CN114393946A

CN114393946A - A dustless equipment of writing for environmental protection teaching

Info

Publication number: CN114393946A
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: 2022-04-26
Anticipated expiration: 2042-01-28
Also published as: CN114393946B

Abstract

The invention relates to the technical field of teaching equipment, in particular to dust-free writing equipment for environmental protection teaching. According to the invention, the spring can gradually drive the winding column to wind the dust-free soft leather, so that tension can be applied to the U-shaped plates on the two sides, the supporting rod can be driven to gradually shrink towards the rotating column, the dust-free soft leather on the 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 to perform dust-free writing when needed, teachers can conveniently perform teaching and the like outdoors, the dust-free soft leather on the two sides can be stretched to the length twice as long as the rotating column, the writing equipment can perform writing and the like on a board in enough area, the dust-free soft leather can be rapidly rewound by matching with the winding column, and the surface can be rapidly cleaned in the rewinding process.

Description

A dustless equipment of writing for environmental protection teaching

Technical Field

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

Background

For a long time, people have made blackboards from materials such as wood boards, glass boards, stone boards and the like and have written on the blackboards with chalks, which provides necessary conditions for the study of people, but the blackboard device has the following great disadvantages: firstly, the friction resistance is large, and the writing is laborious; secondly, the dust pollution is serious when the hand and the clothes are dirty, and the human health is also harmed; thirdly, the writing on the blackboard is not easy to clean; fourthly, the consumption of the chalk and the blackboard brush is large. Present blackboard of writing usefulness is difficult for accomodating the transport to be convenient for remove the open air and use of imparting knowledge to students, when wiping the blackboard through the blackboard eraser, produce the chalk dust and can be inhaled the lung by student or mr, thereby be difficult for mr and student's health, and among the chalk dust can spread the air, can cause the influence to school or open air environmental protection like this, and make the cleaning efficiency to writing equipment lower through the mode of artifical wiping, consume the manpower.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a dust-free writing device for environmental teaching, which is characterized in that an installation column is arranged in the dust-free writing device for environmental teaching, a winding column wound with dust-free soft leather is rotatably arranged in the installation column, a clockwork spring is fixedly arranged between the top end of the winding column and the installation 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 along two sides through the rotation of the bidirectional screw rod, so that the rotating columns on two ends of the lifting seats can be driven to rotate, one end of a support rod sleeved in the rotating column rotates along with a U-shaped plate in the rotating process of the rotating column, two ends of the dust-free soft leather can be gradually stretched through the U-shaped plate, and a first rope winding wheel slidably connected with an upper chute of the bidirectional screw rod is arranged on one side of each of the two lifting seats, so that the first rope winding wheel can be driven to rotate while the bidirectional screw rod rotates, the connecting rope can be wound through the first rope winding wheel, and both ends of the connecting rope are connected with one end of the support rod, so that the support rods on both sides can be dragged to slide in the rotating column through the connecting rope, the opening area of the dust-free soft leather can be increased, the dust-free soft leather on both sides can be opened to the width which is twice as wide as the rotating column, when the rotating column abuts against the limiting blocks on the outer wall of the mounting column and the rotating columns on both sides are in a parallel state, the dust-free soft leather can be opened to the largest area, so that teachers can conveniently carry out blackboard writing, when the bidirectional lead screw rotates reversely, the rotating column can be driven to rotate towards the center position of the lead screw through the two lifting seats, and the connecting rope is gradually released through the first rope winding wheel, the clockwork spring can gradually drive the winding column to wind the dust-free soft leather, so that tension can be applied to the U-shaped plates on both sides, so that the support rods can be driven to gradually shrink towards the rotating column, the dust-free soft leather on the two sides can be reeled into the mounting column again, 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 carry out teaching and the like outdoors, and the dust-free soft leather on the two sides can be unfolded to the length twice that of the rotating column, so that the writing equipment has enough area for writing on boards and the like; the bottom end of the mounting column is provided with the second rope winding wheel, the second rope winding wheel is wound with the pulling rope, the pulling rope on the second rope winding wheel can be gradually pulled out of the protective shell through the pull ring, so that the second rope winding wheel can be driven to rotate, the rotating shaft can drive the third gear to rotate, the third gear can be meshed with the first gear and the second gear to drive the rolling column and the two-way screw rod to rotate together, the rolling column can apply force to the spring when rotating, the two-way screw rod can drive the two lifting seats to move towards two sides of the screw rod by rotating, so that two ends of the dust-free soft leather can be stretched through the rotating column and the support rod, teachers and the like can use the dust-free soft leather conveniently, when the pulling rope is stretched to a certain length, the limiting column can be driven to slide in the sleeving column by poking rod, so that the pulling rope can be butted and clamped through the limiting column, the drawing rope is prevented from shrinking, when the surface of the dust-free soft leather is cleaned, the poke rod can drive the limiting column to retract, the spiral spring can drive the winding column to rapidly shrink the dust-free soft leather, when two sides of the dust-free soft leather shrink towards the center, the surface of the dust-free soft leather can be attached to the cleaning pad in the sliding hole to slide, so that the surface of the dust-free soft leather can be rapidly cleaned through the cleaning pad, when the winding column rotates, the first gear at the bottom of the dust-free soft leather can drive the third gear and the second gear to rotate together, the rotation of the third gear can drive the two pairs of drawing ropes of the rope winding wheel to automatically wind, so that the next drawing is convenient, the rotation of the second gear can drive the two-way screw rod to reversely rotate, so that the U-shaped plates at two sides can be driven to approach towards the center, and the rotating columns and the supporting rods at two sides can shrink, so that the dust-free soft leather can be rapidly rewound by matching with the winding column, the surface of the rewinding process can be cleaned, so that the surface of the dust-free soft leather does not need to be manually cleaned, the cleaning efficiency of dust-free equipment can be improved, and education staff can use the dust-free soft leather conveniently.

The purpose of the invention can be realized by the following technical scheme:

a dust-free writing device for environmental protection teaching comprises an installation column, wherein a winding column is rotatably connected in the installation column, a dust-free soft leather is sleeved on the winding column, a clockwork spring is fixedly arranged at the top end of the winding column, sliding holes are formed in opposite side walls of the installation column, the dust-free soft leather is in sliding connection with the sliding holes, U-shaped plates are fixedly connected at two ends of the dust-free soft leather, a bidirectional lead screw is rotatably connected at the middle line position of the bottom of the installation column, two lifting seats are symmetrically and rotatably connected on the bidirectional lead screw about the vertical central plane of the bidirectional lead screw, a rotating column is rotatably connected at two ends of the two lifting seats, a supporting rod is slidably sleeved in the rotating column, one end of the supporting rod is rotatably connected with the U-shaped plate, two sliding grooves are symmetrically formed in the bidirectional lead screw about the vertical central plane of the bidirectional lead screw, and one end of each lifting seat is rotatably connected with a first rope winding wheel, the first rope winding wheel is in sliding clamping connection with the sliding groove, the first rope winding wheel is connected with a connecting rope in a winding mode, and the two ends of the connecting rope are fixedly connected with one end of the supporting rod.

Further, the bottom of the mounting column is fixedly connected with a protective shell, a rotating shaft is rotatably connected in the protective shell, a gear III is fixedly sleeved at the top end of the rotating shaft, a gear I is fixedly sleeved at the bottom end of the winding column and is meshed with the gear III, a gear II is fixedly sleeved at the bottom end of the bidirectional screw rod and is meshed with the gear III, the gear II and the gear I are positioned at two ends of the gear III, a winding wheel II is fixedly sleeved at the bottom end of the rotating shaft, a pulling rope with one end fixedly connected with the winding wheel II is wound on the winding wheel II, the pulling rope is slidably connected with the protective shell, a pull ring is fixedly arranged at the other end of the pulling rope, one end of the pulling rope can be pulled to move to the outside of the protective shell through the pull ring, so that the gear I and the gear II can be driven to rotate through the gear III at the top of the winding wheel II, when the spring drives the winding post to rotate reversely, the gear III and the gear II can be driven to rotate reversely through the gear I, so that the drawing rope can be wound conveniently and the equipment can be retracted.

Further lie in, the central line position department fixedly connected with strip shell of rotation post outer wall, it is inside that the connection rope is located the strip shell, the one end of strip shell is rotated and is provided with the pulley, connect rope and pulley looks solderless wrapped connection, the central line position department fixedly connected with fixed rope post of strip shell lateral wall, it cup joints with the fixed rope post slip to connect the rope, the central point of connecting the rope puts the outer wall fixed connection of department and rope winding wheel one, through the fixed pulley that is provided with in the one end of strip shell to can be convenient for connect rope and pulley solderless wrapped connection slip, be convenient for connect the rolling of rope.

Further lie in, dustless soft skin is the smooth flexible material in surface makes, the surface of dustless soft skin can be drawn with the whiteboard pen and write, through with dustless soft skin with roll up the post and roll up the cover mutually, and the central line position department of dustless soft skin is fixed mutually with the outer wall of rolling up the post, and mr can write drawing etc. on dustless soft skin through using the whiteboard pen to can conveniently impart knowledge to students.

It is further characterized in that, two the sliding hole position department all is provided with the cleaning pad with erection column inner wall looks fixed connection, the side and the dustless soft skin of cleaning pad are laminated mutually and are slided, through be provided with cleaning pad and dustless soft skin surface in sliding hole department and laminate mutually and slide to when dustless soft skin backrush, can carry out quick cleanness to dustless soft skin surface through cleaning pad.

Further, four limiting blocks are fixedly connected to one side wall, close to the bidirectional screw rod, of the mounting column symmetrically about the vertical central plane of the mounting column, the limiting blocks are all abutted to the rotating column, and the 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 linear state.

Further, the bottom fixedly connected with of protecting crust accepts the seat, accept the seat bottom central point and put fixedly connected with regulation seat, the bottom annular equidistance of regulation seat rotates the one end that is connected with three support foot post, and is three the antiskid cover has all been cup jointed to the other end of support foot post, has cup jointed the antiskid cover through the one end in the support foot post to can increase the frictional force that supports the foot post bottom, prevent it from skidding.

Further, fixedly connected with cover post on the lateral wall of protecting crust, cover post central point department of putting sets up the round hole that cup joints with drawing rope looks slip, fixedly connected with mount on the lateral wall of cover post, mount central point department sliding connection has the poker rod, the one end fixedly connected with of poker rod and the gliding spacing post of cover post looks, the one end and the inconsistent joint of pull rope of spacing post, the other end fixedly connected with of spacing post and the fixed extrusion spring of mount looks, extrusion spring cup joints with the poker rod mutually, can drag spacing post through the poker rod and slide, and the spacing post of being convenient for can carry out conflict joint to the pull rope, and when accomodating equipment, need drag spacing post and move back, is convenient for drawing rope and carries out automatic rolling.

The invention has the beneficial effects that:

1. the dust-free writing equipment for environmental teaching is provided with the mounting column, the inside of the mounting column is rotatably provided with the winding column which winds the dust-free soft leather, a clockwork spring is fixedly arranged between the top end of the winding column and the mounting column, one side of the winding column is provided with the bidirectional screw rod, two sides of two lifting seats on the screw rod can be driven to move through 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 support rod sleeved in the rotating column and a U-shaped plate rotate in the rotating process of the rotating column, and two ends of the dust-free soft leather can be gradually spread through the U-shaped plate, as one side of each of the two lifting seats is provided with the first rope winding wheel which is in sliding connection with the upper chute of the bidirectional screw rod, the first rope winding wheel can be driven to rotate while the bidirectional screw rod rotates, and the connecting rope can be wound through the first rope winding wheel, because both ends of the connecting rope are connected with one end of the stay bar, the stay bars on both sides can be dragged to slide in the rotating column through the connecting rope, so that the opening area of the dust-free soft leather can be increased, the dust-free soft leather on both sides can be opened to the width which is twice as wide as the rotating column, when the rotating column is abutted against the limit blocks on the outer wall of the mounting column, the dust-free soft leather can be opened to the largest area when the rotating columns on both sides are in a parallel state, so that teachers can conveniently write on boards, and when the bidirectional screw rod rotates reversely, the rotating column can be driven to rotate towards the central position of the screw rod through the two lifting seats, and because the rope winding wheel releases the connecting rope gradually, the clockwork spring can drive the winding column to wind the dust-free soft leather gradually, so that the U-shaped boards on both sides can be exerted pulling force, so that the stay bars can be driven to shrink towards the rotating column gradually, so that the dust-free soft leather on both sides can be wound into the mounting column again, therefore, the whole writing equipment can be conveniently stored, the dust-free equipment can be conveniently carried, dust-free soft leather can be unfolded to perform dust-free writing when needed, teachers can conveniently perform teaching and the like outdoors, and the dust-free soft leather on the two sides can be stretched to the length twice of the rotating column, so that the writing equipment has enough area to perform blackboard writing and the like;

2. the bottom end of the mounting column is provided with the second rope winding wheel, the second rope winding wheel is wound with the pulling rope, the pulling rope on the second rope winding wheel can be gradually pulled out of the protective shell through the pull ring, so that the second rope winding wheel can be driven to rotate, the rotating shaft can drive the third gear to rotate, the third gear can be meshed with the first gear and the second gear to drive the rolling column and the two-way screw rod to rotate together, the rolling column can apply force to the spring when rotating, the two-way screw rod can drive the two lifting seats to move towards two sides of the screw rod by rotating, so that two ends of the dust-free soft leather can be stretched through the rotating column and the support rod, teachers and the like can use the dust-free soft leather conveniently, when the pulling rope is stretched to a certain length, the limiting column can be driven to slide in the sleeving column by poking rod, so that the pulling rope can be butted and clamped through the limiting column, the drawing rope is prevented from shrinking, when the surface of the dust-free soft leather is cleaned, the poke rod can drive the limiting column to retract, the spiral spring can drive the winding column to rapidly shrink the dust-free soft leather, when two sides of the dust-free soft leather shrink towards the center, the surface of the dust-free soft leather can be attached to the cleaning pad in the sliding hole to slide, so that the surface of the dust-free soft leather can be rapidly cleaned through the cleaning pad, when the winding column rotates, the first gear at the bottom of the dust-free soft leather can drive the third gear and the second gear to rotate together, the rotation of the third gear can drive the two pairs of drawing ropes of the rope winding wheel to automatically wind, so that the next drawing is convenient, the rotation of the second gear can drive the two-way screw rod to reversely rotate, so that the U-shaped plates at two sides can be driven to approach towards the center, and the rotating columns and the supporting rods at two sides can shrink, so that the dust-free soft leather can be rapidly rewound by matching with the winding column, the surface of the rewinding process can be cleaned, so that the surface of the dust-free soft leather does not need to be manually cleaned, the cleaning efficiency of dust-free equipment can be improved, and education staff can use the dust-free soft leather conveniently.

Drawings

The invention will be further described 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 view of the overall top view 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 structural view of the present invention in an overall expanded state;

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

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

FIG. 7 is a schematic view of a bidirectional screw structure according to the present invention;

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

FIG. 9 is a schematic view of the construction of the rotary post of the present invention;

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

FIG. 11 is a schematic view of the support leg structure of the present invention.

In the figure: 101. mounting a column; 102. rolling the column; 103. a clockwork spring; 104. a first gear; 105. a bidirectional screw rod; 106. a chute; 107. a lifting seat; 108. a rope winding wheel I; 109. a second gear; 110. a rotating shaft; 111. a third gear; 112. a second rope winding wheel; 113. pulling a rope; 114. a slide hole; 115. a cleaning pad; 116. a limiting block; 117. a protective shell; 118. sleeving the column; 119. a circular hole; 120. a fixed mount; 121. a poke rod; 122. a limiting column; 123. a compression spring; 201. rotating the column; 202. a stay bar; 203. a strip-shaped shell; 204. connecting ropes; 205. a rope fixing column; 206. a pulley; 207. a U-shaped plate; 300. dust-free soft leather; 401. a bearing seat; 402. an adjusting seat; 403. a support leg; 404. an anti-slip sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

The bottom of the mounting column 101 is fixedly connected with a protective shell 117, a rotating shaft 110 is rotatably connected in the protective shell 117, a gear III 111 is fixedly sleeved at the top end of the rotating shaft 110, a gear I104 is fixedly sleeved at the bottom end of the rolling column 102, the gear I104 is meshed with the gear III 111, a gear II 109 is fixedly sleeved at the bottom end of the bidirectional screw rod 105, the gear II 109 is meshed with the gear III 111, the gear II 109 and the gear I104 are positioned at two ends of the gear III 111, a rolling wheel II 112 is fixedly sleeved at the bottom end of the rotating shaft 110, a pulling rope 113 with one end fixedly connected with the rolling wheel II 112 is wound on the rolling wheel II 112, the pulling rope 113 is in sliding connection with the protective shell 117, a pulling ring is fixedly arranged at the other end of the pulling rope 113, one end of the pulling rope 113 can be pulled to move to the outside of the protective shell 117 through the pulling ring, so as to drive the rolling wheel II 112 to drive the gear III 111 at the top of the gear II 112 to rotate the gear I104 and the gear II 109, when the winding column 102 is driven by the spring 103 to rotate reversely, the gear three 111 and the gear two 109 can be driven to rotate reversely by the gear one 104, so that the drawing rope 113 can be wound and the device can be retracted conveniently.

Center line position department fixedly connected with strip shell 203 of rotating post 201 outer wall, it is inside that connection rope 204 is located strip shell 203, the one end of strip shell 203 is rotated and is provided with pulley 206, it twines mutually with pulley 206 to connect rope 204, the center line position department fixedly connected with fixed rope post 205 of strip shell 203 lateral wall, it cup joints with fixed rope post 205 slip to connect rope 204, the central point of connecting rope 204 puts the outer wall fixed connection of department and a rope winding wheel 108, through the fixed pulley 206 that is provided with in the one end of strip shell 203, thereby can be convenient for connect rope 204 and pulley 206 the wraparound and slide, be convenient for connect the rolling of rope 204.

Dustless soft leather 300 is made for the smooth flexible material in surface, and dustless soft leather 300's surface can be write with the whiteboard pen drawing, through with dustless soft leather 300 with roll up the post 102 and roll up the cover mutually, and dustless soft leather 300's central line position department and the outer wall of rolling up post 102 are fixed mutually, and mr can write drawing etc. on dustless soft leather 300 through using the whiteboard pen to can conveniently impart knowledge to students.

The cleaning pads 115 fixedly connected with the inner walls of the mounting posts 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 to slide, and the cleaning pads 115 are arranged at the positions of the sliding holes 114 and attached to the surface of the dust-free soft leather 300 to slide, so that when the dust-free soft leather 300 is rewound, the surface of the dust-free soft leather 300 can be quickly cleaned through the cleaning pads 115; the four limiting blocks 116 are fixedly connected to one side wall, close to the bidirectional screw rod 105, of the mounting column 101 symmetrically about the vertical central plane of the mounting column, the four limiting blocks 116 are all inconsistent with the rotating column 201, 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 the two sides can be kept in a linear state.

The bottom of the protective 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 rotatably connected with one end of three supporting legs 403, the other ends of the three supporting legs 403 are fixedly sleeved with anti-slip sleeves 404, and the anti-slip sleeves 404 are sleeved at one ends of the supporting legs 403, so that the friction force at the bottom ends of the supporting legs 403 can be increased, and the anti-slip is prevented; fixedly connected with cover post 118 on the lateral wall of protecting crust 117, cover post 118 central point department of putting sets up the round hole 119 that cup joints with drawing rope 113 mutually that slides, fixedly connected with mount 120 on the lateral wall of cup jointing post 118, mount 120 central point department of putting sliding connection has poker rod 121, the one end fixedly connected with of poker rod 121 with cup joint post 118 gliding spacing post 122 mutually, spacing post 122's one end and drawing rope 113 inconsistent joint, spacing post 122's the other end fixedly connected with and mount 120 fixed extrusion spring 123 mutually, extrusion spring 123 cup joints with poker rod 121 mutually, can drag spacing post 122 through poker rod 121 and slide, be convenient for spacing post 122 can carry out the joint to drawing rope 113 and contradict, and when accomodating equipment, need drag spacing post 122 and move back, be convenient for drawing rope 113 carries out the automatic rolling.

The working principle is as follows: when the dust-free writing instrument is used, the three supporting legs 403 are pulled to enable the three supporting legs 403 to fall on the ground, so that the supporting and positioning of the dust-free writing instrument can be completed, when the teaching is required, the pull rope 113 can be pulled through the pull ring to pull the pull rope 113 to the outside of the protective shell 117, the second rope winding 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 to rotate through the rotating shaft 110, the first gear 104 and the second gear 109 at two sides can be meshed and driven through the third gear 111, the first gear 104 can drive the winding legs 102 to rotate, so that the spring 103 can be energized, 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 to move towards two sides, and in the process, the lifting seats 107 can drive the rotating legs 201 at two ends to rotate, thereby gradually driving the U-shaped plates 207 at the two ends of the device to move towards the two sides, thereby gradually driving the two ends of the dust-free soft leather 300 to be drawn out from the sliding holes 114 at the two sides of the mounting column 101, driving the rope winding wheel 108 on the lifting seat 107 to rotate when the bidirectional screw rod 105 rotates, winding the connecting rope 204 through the rope winding wheel 108, because the two ends of the connecting rope 204 are connected with one end of the stay bar 202, thereby dragging the stay bars 202 at the two sides to slide out from the rotating column 201 when the connecting rope 204 contracts towards the center, the stay bar 202 can push the U-shaped plates 207 at the two sides to move, thereby increasing the expansion area of the dust-free soft leather 300, leading the expansion width at the two sides of the dust-free soft leather 300 to be twice the length of the rotating column 201, thereby being convenient for teachers to carry out board writing or drawing and the like, when the rotating column 201 abuts against the limiting block 116, the drawing rope 113 can be butted and clamped through the limiting column 122, preventing the material from shrinking back;

when the surface of the dust-free soft leather 300 is required to be cleaned or the equipment is required to be stored, the limiting column 122 can be pulled out of the sleeve-connection column 118 through the poke rod 121, the spiral spring 103 can drive the winding column 102 to rotate, so that 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 gear III 111 can drive the winding wheel II 112 at the bottom to rotate when rotating, so that the drawing rope 113 can be automatically wound through the winding wheel II 112, so that the drawing rope can be drawn next time, when the gear II 109 rotates, the two-way screw rod 105 can be driven to reversely rotate, so that the two lifting seats 107 can be driven to move towards the center of the screw rod, the lifting seats 107 can drive the rotating columns 201 at the two ends to reversely rotate, so that the U-shaped plates 207 at the two sides of the equipment can be driven to approach towards the mounting column 101 and due to the reverse rotation of the two-way screw rod 105, thereby can drive lifting seat 107 upward take-up sheave 108 antiport, thereby can release connection rope 204 gradually, and vaulting pole 202 then slides down rotating in post 201 under the thrust of U template 207, thereby shrink gradually, can accomplish the shrink of equipment gradually like this, thereby can be convenient for after take in equipment, when rolling up post 102 and carry out quick rewind to dustless soft skin 300, dustless soft skin 300's both sides surface ability and the cleaning pad 115 of slide opening 114 position department slide fit, can clean dustless soft skin 300's surface fast like this, thereby do not need manual to clean dustless soft skin 300's surface, can improve the cleaning efficiency to dustless equipment, the educational affiliator of being convenient for uses.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims

1. The dust-free writing equipment for environmental protection teaching is characterized by comprising a mounting column (101), wherein 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 clockwork 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 at two ends of the dust-free soft leather (300), a bidirectional screw rod (105) is rotatably connected at the middle line position of the bottom of the mounting column (101), two lifting seats (107) are symmetrically and rotatably connected on the bidirectional screw rod (105) relative to the vertical central plane of the bidirectional screw rod, two rotating columns (201) are rotatably connected at two ends of the lifting seats (107), and a support rod (202) is slidably sleeved in the rotating column (201), the one end and the U template (207) of vaulting pole (202) rotate to be connected, two spout (106), two have been seted up in its vertical central plane symmetry on two-way lead screw (105) the one end of lift seat (107) is all rotated and is connected with a rope sheave (108), a rope sheave (108) and spout (106) slip joint, the wire-wound connection has connection rope (204) on a rope sheave (108), the both ends of connecting rope (204) all with the one end fixed connection of vaulting pole (202).

2. The dust-free writing device for environmental teaching as claimed in claim 1, wherein a protective shell (117) is fixedly connected to the bottom of the mounting column (101), a rotating shaft (110) is rotatably connected in the protective shell (117), a gear three (111) is fixedly sleeved on the top end of the rotating shaft (110), a gear one (104) is fixedly sleeved on the bottom end of the winding column (102), the gear one (104) is meshed with the gear three (111), a gear two (109) is fixedly sleeved on the bottom end of the bidirectional screw rod (105), the gear two (109) is meshed with the gear three (111), the gear two (109) and the gear one (104) are located at two ends of the gear three (111), a winding wheel two (112) is fixedly sleeved on the bottom end of the rotating shaft (110), a drawing rope (113) with one end fixedly connected with the winding wheel two (112) is wound on the winding wheel two (112), the pulling rope (113) is connected with the protective shell (117) in a sliding mode, and a pulling ring is fixedly arranged at the other end of the pulling rope (113).

3. The dust-free writing device for environmental teaching as claimed in claim 1, wherein a strip-shaped shell (203) is fixedly connected to a central line position of an outer wall of the rotating column (201), the connecting rope (204) is located inside the strip-shaped shell (203), a pulley (206) is rotatably arranged at one end of the strip-shaped shell (203), the connecting rope (204) is in winding connection with the pulley (206), a fixed rope column (205) is fixedly connected to a central line position of an outer wall of the strip-shaped shell (203), the connecting rope (204) is in sliding sleeve connection with the fixed rope column (205), and a central position of the connecting rope (204) is fixedly connected with an outer wall of the rope winding wheel I (108).

4. A dust-free writing device for environmental teaching according to claim 1, wherein the dust-free soft cover (300) is made of a flexible material with a smooth surface, and the surface of the dust-free soft cover (300) can be written by a whiteboard pen.

5. The dust-free writing device for environmental teaching as claimed in claim 1, wherein a cleaning pad (115) fixedly connected with the inner wall of the mounting post (101) is arranged at each of the two sliding holes (114), and the side surface of the cleaning pad (115) is attached to the dust-free soft leather (300) to slide.

6. The dust-free writing device for environmental teaching as claimed in claim 1, wherein four limiting blocks (116) are symmetrically and fixedly connected to a side wall of the mounting column (101) close to the bidirectional screw rod (105) about a vertical central plane of the mounting column, and the four limiting blocks (116) are all abutted to the rotating column (201).

7. The dust-free writing device for environmental teaching as claimed in claim 2, wherein the bottom of the protective shell (117) is fixedly connected with a receiving base (401), the central position of the bottom of the receiving base (401) is fixedly connected with an adjusting base (402), the bottom of the adjusting base (402) is rotatably connected with one end of three supporting legs (403) in an annular and equidistant manner, and the other end of each of the three supporting legs (403) is fixedly sleeved with an anti-slip sleeve (404).

8. A dust-free writing apparatus for environmental teaching according to claim 2, a sleeve connecting column (118) is fixedly connected on the side wall of the protective shell (117), a round hole (119) which is in sliding sleeve connection with the pulling rope (113) is arranged at the central position of the sleeve connecting column (118), a fixed mount (120) is fixedly connected on the side wall of the sleeving connection column (118), a poke rod (121) is connected at the center of the fixed mount (120) in a sliding manner, one end of the poke rod (121) is fixedly connected with a limit column (122) which slides with the sleeving column (118), the one end and the inconsistent joint of drawing rope (113) of spacing post (122), the other end fixedly connected with of spacing post (122) and mount (120) extrusion spring (123) fixed mutually, extrusion spring (123) cup joint mutually with poker rod (121).