CN214083629U

CN214083629U - Horizontal pulling scroll type flexible white board suite

Info

Publication number: CN214083629U
Application number: CN202022929581.0U
Authority: CN
Inventors: 董永健
Original assignee: Changzhou Vocational Institute of Mechatronic Technology
Current assignee: Changzhou Vocational Institute of Mechatronic Technology
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-08-31
Anticipated expiration: 2030-12-07

Abstract

The utility model discloses a horizontal pulling scroll type flexible whiteboard suite, which comprises a supporting frame and a whiteboard operating system, wherein the whiteboard operating system comprises a flexible whiteboard, a writing lining plate, a roller sliding component, a driving scroll component, a wiping device and a crank driving device; the sliding roller component comprises a first sliding roller and a second sliding roller, the driving roller component comprises a first driving roller and a second driving roller, the board wiping device comprises a first writing wiping board and a second writing wiping board, the crank driving device comprises a first crank and a second crank, the flexible white board can slide on the writing lining board under the driving of the first driving roller or the second driving roller through the transmission of the first sliding roller and the second sliding roller, and when the flexible white board passes through the first writing wiping board and the second writing wiping board, surface writing is automatically erased. The flexible whiteboard suite is long in size, can automatically erase handwriting, facilitates teaching of teachers and facilitates students to master knowledge points, and greatly improves teaching efficiency and quality.

Description

Horizontal pulling scroll type flexible white board suite

Technical Field

The utility model relates to a teaching equipment product technical field especially relates to a violently draw spool formula flexible blank external member.

Background

At present, in the prior art, the hard white board for teaching of schools and training institutions or the flexible white board used by being attached to a wall is limited in general size, teachers need to frequently erase writing on the white board when teaching to reserve space for continuing teaching, inconvenience is brought to the teachers, time and labor are wasted, and on the other hand, due to the fact that the time of the writing content staying on the white board is short, the writing recording or the memory mastering of the students are not facilitated, and therefore the teaching efficiency and quality are affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome prior art not enough, provide a violently draw spool formula flexible blank external member, its size is long, and can realize the automatic of writing and erase, makes things convenient for the teacher to teach and does benefit to the student and master the knowledge point, has improved teaching efficiency and quality greatly.

In order to solve the technical problem, the technical scheme of the utility model is that:

a transverse pull scroll type flexible whiteboard kit comprises a supporting frame and a whiteboard operating system, wherein the whiteboard operating system comprises a flexible whiteboard, a writing lining board, a sliding roller component, a driving scroll component, a board wiping device and a crank driving device; the writing lining plate is fixedly arranged at the front end of the top of the support frame and used for serving as a substrate for the flexible white board; the roller assembly comprises a first roller and a second roller, the first roller and the second roller are rotatably mounted at the front ends of two sides of the top of the support frame and positioned behind two sides of the writing lining plate and are used for driving the flexible white board; the driving scroll assembly comprises a first driving scroll and a second driving scroll, and the first driving scroll and the second driving scroll are rotatably arranged at the rear ends of the two sides of the top of the supporting frame, are positioned behind the writing lining plate and are used for driving the flexible white board to slide; the erasing plate device comprises a first writing erasing plate and a second writing erasing plate, wherein the first writing erasing plate and the second writing erasing plate are fixedly arranged on two sides of the top of the supporting frame, are close to the first sliding roller and the second sliding roller and are used for erasing the writing on the surface of the flexible white board; the crank driving device comprises a first crank and a second crank, and the first crank and the second crank are respectively connected with the first driving reel and the second driving reel and are used for controlling the rotation of the first driving reel and the second driving reel; the flexible whiteboard is characterized in that two ends of the flexible whiteboard are respectively connected to the first driving scroll and the second driving scroll in a winding mode, the middle of the flexible whiteboard is sequentially tightly attached to and surrounds the first sliding roller, the outer surface of the writing lining plate and the second sliding roller, the flexible whiteboard penetrates through gaps between the first handwriting wiping plate and the first sliding roller and between the second sliding roller, the flexible whiteboard can slide on the writing lining plate under the driving of the first driving scroll or the second driving scroll through the transmission of the first sliding roller and the second sliding roller, and when the flexible whiteboard is wiped through the first handwriting wiping plate and the second handwriting wiping plate, surface handwriting is automatically erased.

Furthermore, the first crank and the second crank are respectively arranged on two sides of the supporting frame in a penetrating and rotating mode; a first transverse corner gear is arranged at the inner side end of the first crank handle, a first central shaft which penetrates through the first driving reel up and down is arranged at the center of the first driving reel, the first central shaft penetrates through the top surface of the supporting frame and is rotatably installed on the top surface of the supporting frame, and a first vertical corner gear matched with the first transverse corner gear is arranged at the lower end of the first central shaft; and a second transverse corner gear is arranged at the inner side end of the second crank, a second central shaft which penetrates through the second crank from top to bottom is arranged at the center of the second driving reel, the second central shaft penetrates through the supporting frame and is rotatably installed on the top surface of the supporting frame, and a second vertical corner gear matched with the second transverse corner gear is arranged at the lower end of the second central shaft.

Furthermore, a first serrated jaw ring facing to one direction is arranged on the wall of the inner ring of the first driving scroll, a first jaw is rotatably embedded outside the first central shaft, a first return spring is further arranged between the first jaw and the first central shaft, the first jaw is clamped in the first jaw ring, and when the first central shaft rotates along the serrated direction of the first jaw ring, the first driving scroll can be driven to rotate, otherwise, the first driving scroll idles; set up the cockscomb structure second jack catch circle towards another direction on the second drive spool inner circle wall, the rotatory embedding in second center pin outside is provided with the second jack catch, still is equipped with second return spring between second jack catch and the second center pin, and in the second jack catch circle was gone into to the second jack catch card, when the cockscomb structure direction of second jack catch circle was rotatory along to the second center pin, can drive the rotation of second drive spool, otherwise is the idle running.

Furthermore, trapezoidal card strips are arranged at the upper edge and the lower edge of the inner side of the flexible white board, corresponding sliding roller clamping grooves are formed in the upper edge and the lower edge of the first sliding roller column and the upper edge and the lower edge of the second sliding roller column, and corresponding sliding clamping grooves are formed in the upper edge and the lower edge of the outer side of the writing lining board.

Further, the height of the first handwriting wiping plate and the height of the second handwriting wiping plate are larger than that of the flexible white board, the inner sides of the first handwriting wiping plate and the second handwriting wiping plate are in a concave curved surface shape, and the inner surfaces of the first handwriting wiping plate and the second handwriting wiping plate are respectively tightly attached to the first sliding roller and the second sliding roller.

Furthermore, the supporting frame both ends all are provided with changes the core, the hollow passageway that runs through from top to bottom is all seted up at first smooth roller and second smooth roller center, and first smooth roller and second smooth roller cup joint on changeing the core through hollow passageway to can revolute the core rotation.

Further, the bottom of the supporting frame is provided with an eccentric pulley for moving the whole structure.

Further, the outer sides of the first handwriting wiping plate and the second handwriting wiping plate are respectively provided with a dust cover, and the bottom end of the dust cover is fixedly connected to the top of the supporting frame.

Furthermore, the first slide roller and the second slide roller are made of plastics.

Further, the first handwriting wiping plate and the second handwriting wiping plate are made of plastic, sponge and cloth.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

the utility model discloses a to smooth roller subassembly, drive spool subassembly, wipe the design of parts such as board device, make the teacher through rotating crank drive arrangement, just can realize the automation of writing and wipe, saved and cleaned time and teacher's strength, make things convenient for the teacher to teach better. The flexible whiteboard is long in transverse size and large in writing area, and teachers can adopt a mode of rolling up one point and using one point when teaching, so that the time of teaching contents staying on the whiteboard is longer, and students can copy records and master the content of the taught knowledge more favorably. The utility model discloses not only solved the limited problem of ordinary blank size, removed the manual fatigue that erases the writing moreover from in the use, practical value is high, has improved teaching efficiency and quality greatly.

Through the design to violently erecting corner gear between crank and the center pin, change horizontal revolving force into vertical revolving force, reduced the strength that the teacher cleaned better, make things convenient for the teacher to impart knowledge to students, improve teaching efficiency. Through the design of the one-way bayonet catch between the driving scroll and the central shaft, the problem of mistakenly wiping important contents due to reverse rotation is well avoided, more convenience is provided for continuous teaching and wiping, the teaching of teachers is facilitated, and the teaching efficiency and quality are further optimized.

Drawings

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

FIG. 2 is a schematic front view of the present invention;

fig. 3 is a schematic top view of the present invention;

fig. 4 is a schematic rear side structure diagram of the present invention;

fig. 5 is an enlarged schematic view of the structure of the flexible whiteboard of the present invention;

FIG. 6 is an enlarged view of the writing liner and roller assembly of the present invention;

fig. 7 is a schematic top sectional view of the first drive spool and the first center shaft of the present invention;

fig. 8 is a schematic top sectional view of a second drive spool and a second center shaft according to the present invention;

the writing tool comprises a supporting frame 1, a flexible white board 2, a writing lining board 3, an eccentric pulley 11, an eccentric pulley 12, a dust cover 41, a first sliding roller column 42, a second sliding roller column 51, a first driving scroll 52, a second driving scroll 53, a first vertical corner gear 54, a second vertical corner gear 55, a first central shaft 56, a second central shaft 61, a first handwriting wiping plate 62, a second handwriting wiping plate 71, a first crank 72, a second crank 73, a first transverse corner gear 74, a second transverse corner gear 101, a rotating core 201, a trapezoidal clamping strip 202, a sliding roller clamping groove 203, a sliding clamping groove 510, a first clamping ring 520, a second clamping ring 550, a first clamping jaw 551, a first return spring 560, a second clamping jaw 561 and a second return spring.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

As shown in fig. 1 to 8, in the present embodiment, a horizontal pull scroll type flexible whiteboard set comprises a supporting frame 1 and a whiteboard operating system, wherein the supporting frame 1 may be constructed by a light alloy material, and the whiteboard operating system specifically comprises a flexible whiteboard 2, a writing lining board 3, a sliding roller assembly, a driving scroll assembly, a board wiping device and a crank driving device; the writing liner plate 3 is fixedly arranged at the front end of the top of the support frame 1 and used for lining the flexible white board 2, so that writing is facilitated, and a hard board can be adopted; the sliding roller component comprises a first sliding roller 41 and a second sliding roller 42, the first sliding roller 41 and the second sliding roller 42 are rotatably arranged at the front ends of the two sides of the top of the supporting frame 1 and are positioned behind the two sides of the writing lining plate 3, and are used for driving the flexible white board 2, so that the smooth sliding of the flexible white board 2 on the writing lining plate 3 can be ensured; the driving scroll assembly comprises a first driving scroll 51 and a second driving scroll 52, the first driving scroll 51 and the second driving scroll 52 are rotatably arranged at the rear ends of the two sides of the top of the supporting frame 1, are positioned behind the writing liner 3 and are used for driving the flexible white board 2 to slide; the board wiping device comprises a first writing wiping board 61 and a second writing wiping board 62, wherein the first writing wiping board 61 and the second writing wiping board 62 are fixedly arranged on two sides of the top of the supporting frame 1 and are close to the first sliding roller 41 and the second sliding roller 42 for wiping the writing on the surface of the flexible white board 2; the crank driving device comprises a first crank 71 and a second crank 72, wherein the first crank 71 and the second crank 72 are respectively connected with the first driving reel 51 and the second driving reel 52 and are used for controlling the rotation of the first driving reel 51 and the second driving reel 52; the two ends of the flexible white board 2 are respectively connected to the first driving scroll 51 and the second driving scroll 52 in a winding way, the middle part of the flexible white board is sequentially clung to and surrounding the first sliding roller 41, the outer surface of the writing lining board 3 and the second sliding roller 42, and the flexible white board 2 passes through the gaps between the first writing erasing board 61 and the second writing erasing board 62 and the first sliding roller 41 and the second sliding roller 42 respectively, can slide on the writing lining board 3 under the driving of the first driving scroll 51 or the second driving scroll 52 through the transmission of the first sliding roller 41 and the second sliding roller 42, and when passing through the first writing erasing board 61 and the second writing erasing board 62, surface writing is automatically erased. So set up when the teacher rotates crank drive arrangement, just can realize the automation of handwriting and wipe, saved and cleaned time and teacher's strength, make things convenient for the teacher to teach better, and this flexible whiteboard horizontal size is long, the teacher can take a book a bit when teaching, with a bit mode, the time that can make the teaching content stop on the whiteboard like this is longer, thereby more be favorable to the student to copy the record and master the knowledge content of teaching, and then improve teaching efficiency and quality greatly.

In order to save more labor during wiping, the first crank 71 and the second crank 72 in the embodiment are respectively installed on two sides of the supporting frame 1 in a penetrating and rotating manner and can be connected in a rotating manner through bearings, so that flexible rotation and reduction of movable gaps are realized; a first transverse corner gear 73 is arranged at the inner end of the first crank handle 71, a first central shaft 55 which penetrates up and down is arranged at the center of the first driving reel 51, the first central shaft 55 penetrates through the top surface of the supporting frame 1 and is rotatably arranged, the penetrating positions are connected by adopting bearings, and a first vertical corner gear 53 matched with the first transverse corner gear 73 is arranged at the lower end of the first central shaft 55; a second transverse corner gear 74 is arranged at the inner end of the second crank 72, a second central shaft 56 which penetrates up and down is arranged at the center of the second driving reel 52, the second central shaft 56 penetrates through and is rotatably installed on the top surface of the supporting frame 1, the penetrating positions are connected by adopting bearings, and a second vertical corner gear 54 which is matched with the second transverse corner gear 74 is arranged at the lower end of the second central shaft 56. So set up and be convenient for change horizontal revolving force into vertical revolving force into, can reduce the strength that the teacher cleaned better, it is more laborsaving to remove the blank, makes things convenient for the teacher to impart knowledge to students, further improves teaching efficiency.

In order to prevent the problem of mistaken wiping caused by the reverse rotation of the crank handle in the teaching process, the inner wall of the first driving reel 51 in the embodiment is provided with a first bayonet ring 510 with a saw-toothed shape facing one direction, the outer side of the first central shaft 55 is provided with a first claw 550 in a rotating and embedding manner, a first return spring 551 is further arranged between the first claw 550 and the first central shaft 55, the first claw 550 is clamped in the first bayonet ring 510, when the first central shaft 55 rotates along the saw-toothed direction of the first bayonet ring 510, the first driving reel 51 can be driven to rotate under the clamping action of the first claw 550, otherwise, the first claw 550 can rotate inwards under the extrusion of the saw-toothed bayonet of the first bayonet ring 510, so that the first claw 550 idles without any resistance, and when the first claw 550 just enters the next saw-toothed bayonet, the first claw 550 is successfully clamped in the saw-toothed bayonet under the action of the return spring 551, and if the first claw rotates along the saw-toothed direction of the first bayonet ring 510, the first driving reel 51 is successfully driven to rotate, if the first driving reel rotates reversely, the first driving reel continues to idle, and the steps are repeated; the inner wall of the second driving reel 52 is provided with a serrated second bayonet ring 520 facing the other direction, the outer side of the second central shaft 56 is rotatably embedded with a second claw 560, a second return spring 561 is further arranged between the second claw 560 and the second central shaft 56, the second claw 560 is clamped in the second bayonet ring 520, when the second central shaft 56 rotates along the serrated direction of the second bayonet ring 520, the second driving reel 52 can be driven to rotate under the clamping action of the second claw 560, otherwise, the second claw 560 rotates inwards under the extrusion of the serrated bayonet of the second bayonet ring 520, so that the second driving reel 52 idles without any resistance, when the second claw 560 just enters the next serrated bayonet, the second claw is successfully clamped in the serrated bayonet under the action of the return spring 561, and if the second claw rotates along the serrated direction of the second bayonet ring 520, the second driving reel 52 is successfully driven to rotate, if the rotation is still opposite, the idle rotation is continued, and the operation is repeated. Taking this embodiment as an example, referring to fig. 7 and 8 which are cross-sectional views of a top view, and referring to a top view of fig. 3, when the first crank 71 rotates clockwise, the first central shaft 55 rotates counterclockwise, and then drives the first driving reel 51 to rotate counterclockwise, so that the front flexible whiteboard 2 slides to the right, otherwise, the first crank 71 rotates counterclockwise, and then idles; when the second crank 72 rotates counterclockwise, the second central shaft 56 rotates clockwise, and then the second driving reel 52 is driven to rotate clockwise, so that the front flexible whiteboard 2 slides to the left, otherwise, the second crank 72 rotates clockwise to idle. So set up through the design of the one-way bayonet socket jack catch between drive spool and the center pin, can only control 2 unidirectional movement of flexible blank, avoided well because of the anti-problem that causes the mistake to wipe important content of commentaries on classics, for lasting teaching and wiping provide more convenience, do benefit to teacher's teaching, further improved teaching efficiency and quality.

In order to prevent the flexible whiteboard 2 from sagging or deforming due to gravity, the inner upper and lower edges of the flexible whiteboard 2 in this embodiment are provided with trapezoidal clamping strips 201, which may be made of rubber, the upper and lower edges of the first and

second roller columns

41 and 42 are provided with corresponding roller clamping slots 202, and the outer upper and lower edges of the writing liner 3 are provided with corresponding sliding clamping slots 203. The trapezoidal card strip 201 at the edge of the flexible white board 2 can be tightly attached to the slide roller clamping groove 202 of the slide roller and the slide clamping groove 203 of the writing lining board 3, the flexible white board 2 is not easy to have the condition that the middle part is sagged or the shape is deformed, and the teaching quality of a teacher is further ensured.

In this embodiment, the height of the first writing erasing plate 61 and the second writing erasing plate 62 is greater than the height of the flexible whiteboard 2, the inner sides of the first writing erasing plate 61 and the second writing erasing plate 62 are concave curved, and the inner surfaces thereof respectively abut against the first sliding roller 41 and the second sliding roller 42. So set up and to make to clean more fully clean, the design that the concave curved surface form was hugged closely has not only adapted to the surface of smooth roller, can help the trapezoidal card strip 201 in edge of flexible whiteboard 2 to imbed in smooth roller draw-in groove 202 better, play correction and reinforced effect, and when the roll of flexible whiteboard 2 stopped suddenly, the drive spool of being driven rotatory can continue to rotate a bit because of physical inertia, cause flexible whiteboard 2 to relax slightly, this moment because the reason that the smooth roller was tightly hugged to the handwriting wiping board, the trapezoidal card strip 201 that can not make flexible whiteboard 2 and the slip draw-in groove 203 that writes welt 3 pine take off, avoid influencing the teacher and use.

In this embodiment, the two ends of the supporting frame 1 are respectively provided with a rotating core 101, the centers of the first sliding roller column 41 and the second sliding roller column 42 are respectively provided with a hollow channel which penetrates through the center from top to bottom, and the first sliding roller column 41 and the second sliding roller column 42 are sleeved on the rotating core 101 through the hollow channels and can rotate around the rotating core 101. So set up the position stability that can guarantee the smooth roller, and more smooth and easy when rotating, do not influence the transmission of flexible blank 2.

In order to facilitate the moving position, the bottom of the supporting frame 1 in this embodiment is provided with an eccentric pulley 11 for the movement of the whole structure. So set up and can conveniently use in other classrooms, be convenient for directly promote to the position of wanting and impart knowledge to students, provide a lot of convenience for the teaching.

In this embodiment, the first writing erasing plate 61 and the second writing erasing plate 62 are both provided with a dust cover 12 at the outer side, and the bottom end of the dust cover 12 is fixedly connected to the top of the supporting frame 1. So set up and can block and clean some dust that the in-process produced, the air quality when keeping the teaching does benefit to the environment when teaching.

The first and

second rollers

41 and 42 in this embodiment are made of plastic. Thus, the flexible whiteboard 2 is lighter, has smaller resistance when rotating, is smoother to rotate, and is smoother to slide.

The first and second

writing brush boards

61 and 62 in this embodiment are made of plastic, sponge, and cloth. Such three-layer design makes to clean the effect better, and the cloth cover is cleaned and also can be convenient for wash the change, and the sponge is soft be convenient for flexible blank 2's smooth through.

This section violently draws spool formula flexible whiteboard external member has solved the limited problem of ordinary whiteboard size, has removed the tired of manual erasing the writing in the use from, reasonable in design, system stability, solution thinking are clear, and technical scheme is novel, and practical value is high, and manufacturing cost is not high moreover, does not need high processing technology very much, has certain market demand and good spreading value.

The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a violently draw spool formula flexible whiteboard external member which characterized in that: the whiteboard operation system comprises a support frame (1) and a whiteboard operation system, wherein the whiteboard operation system comprises a flexible whiteboard (2), a writing lining plate (3), a sliding roller component, a driving scroll component, a board wiping device and a crank driving device;

the writing lining plate (3) is fixedly arranged at the front end of the top of the supporting frame (1) and is used for serving as a substrate for the flexible white board (2);

the roller assembly comprises a first roller (41) and a second roller (42), the first roller (41) and the second roller (42) are rotatably arranged at the front ends of two sides of the top of the support frame (1) and are positioned behind two sides of the writing lining plate (3) and used for driving the flexible white board (2);

the driving scroll assembly comprises a first driving scroll (51) and a second driving scroll (52), the first driving scroll (51) and the second driving scroll (52) are rotatably arranged at the rear ends of the two sides of the top of the supporting frame (1) and are positioned behind the writing lining plate (3) and used for driving the flexible white board (2) to slide;

the board wiping device comprises a first writing wiping board (61) and a second writing wiping board (62), wherein the first writing wiping board (61) and the second writing wiping board (62) are fixedly arranged on two sides of the top of the supporting frame (1), are close to the first sliding roller (41) and the second sliding roller (42), and are used for wiping writing on the surface of the flexible white board (2);

the crank driving device comprises a first crank (71) and a second crank (72), wherein the first crank (71) and the second crank (72) are respectively connected with a first driving reel (51) and a second driving reel (52) and are used for controlling the rotation of the first driving reel (51) and the second driving reel (52);

the flexible whiteboard (2) is characterized in that two ends of the flexible whiteboard (2) are respectively connected to a first driving scroll (51) and a second driving scroll (52) in a winding mode, the middle of the flexible whiteboard is sequentially and tightly attached to and surrounds a first sliding roller (41), the outer surface of the writing lining plate (3) and a second sliding roller (42), the flexible whiteboard penetrates through a gap between a first handwriting wiping plate (61) and a second handwriting wiping plate (62) and a gap between the first sliding roller (41) and a gap between the second sliding roller (42) and the second handwriting wiping plate (62), the flexible whiteboard (2) can slide on the writing lining plate (3) under the driving of the first driving scroll (51) or the second driving scroll (52) through the transmission of the first sliding roller (41) and the second sliding roller (42), and surface handwriting is automatically erased when the first handwriting wiping plate (61) and the second handwriting wiping plate (62) pass.

2. The pull-reel flexible whiteboard kit according to claim 1, wherein: the first crank handle (71) and the second crank handle (72) are respectively arranged on two sides of the supporting frame (1) in a penetrating and rotating mode; a first transverse corner gear (73) is arranged at the inner side end of the first crank handle (71), a first central shaft (55) which penetrates through the first driving reel (51) up and down is arranged at the center of the first driving reel, the first central shaft (55) penetrates through the top surface of the supporting frame (1) and is rotatably installed on the top surface of the supporting frame, and a first vertical corner gear (53) matched with the first transverse corner gear (73) is arranged at the lower end of the first central shaft (55); a second transverse corner gear (74) is arranged at the inner side end of the second crank (72), a second central shaft (56) which penetrates through the second driving reel (52) up and down is arranged at the center of the second driving reel, the second central shaft (56) penetrates through the top surface of the supporting frame (1) and is rotatably installed on the top surface of the supporting frame, and a second vertical corner gear (54) which is matched with the second transverse corner gear (74) is arranged at the lower end of the second central shaft (56).

3. The pull-reel flexible whiteboard kit according to claim 2, wherein: the wall of the inner ring of the first driving scroll (51) is provided with a first serrated jaw ring (510) facing to one direction, the outer side of the first central shaft (55) is rotatably embedded with a first jaw (550), a first return spring (551) is further arranged between the first jaw (550) and the first central shaft (55), the first jaw (550) is clamped in the first jaw ring (510), and when the first central shaft (55) rotates along the serrated direction of the first jaw ring (510), the first driving scroll (51) can be driven to rotate, otherwise, the first driving scroll is idle; the inner ring wall of the second driving scroll (52) is provided with a serrated second jaw ring (520) facing to the other direction, the outer side of the second central shaft (56) is rotatably embedded with a second jaw (560), a second return spring (561) is further arranged between the second jaw (560) and the second central shaft (56), the second jaw (560) is clamped into the second jaw ring (520), and when the second central shaft (56) rotates along the serrated direction of the second jaw ring (520), the second driving scroll (52) can be driven to rotate, otherwise, the second driving scroll is idle.

4. The pull-reel flexible whiteboard kit according to claim 1, wherein: trapezoidal card strip (201) are provided with to the inboard top and bottom edge of flexible whiteboard (2), corresponding smooth roll draw-in groove (202) have been seted up to the top and bottom edge of first smooth roller (41) and second smooth roller (42), corresponding slip draw-in groove (203) have been seted up to the top and bottom edge in the outside of writing welt (3).

5. The pull-reel flexible whiteboard kit according to claim 4, wherein: the height of the first writing erasing plate (61) and the height of the second writing erasing plate (62) are larger than that of the flexible white board (2), the inner sides of the first writing erasing plate (61) and the second writing erasing plate (62) are in a concave curved surface shape, and the inner surfaces of the first writing erasing plate and the second writing erasing plate are respectively tightly attached to the first sliding roller (41) and the second sliding roller (42).

6. The pull-reel flexible whiteboard kit according to claim 1, wherein: the supporting frame is characterized in that rotating cores (101) are arranged at two ends of the supporting frame (1), hollow channels which penetrate through the first sliding roller column (41) and the second sliding roller column (42) from top to bottom are formed in the centers of the first sliding roller column (41) and the second sliding roller column (42), the first sliding roller column (41) and the second sliding roller column (42) are sleeved on the rotating cores (101) through the hollow channels, and the first sliding roller column and the second sliding roller column can rotate around the rotating cores (101).

7. The pull-reel flexible whiteboard kit according to claim 1, wherein: the bottom of the supporting frame (1) is provided with an eccentric pulley (11) for moving the whole structure.

8. The pull-reel flexible whiteboard kit according to claim 1, wherein: the outer sides of the first writing erasing plate (61) and the second writing erasing plate (62) are respectively provided with a dust cover (12), and the bottom end of the dust cover (12) is fixedly connected to the top of the supporting frame (1).

9. The pull-reel flexible whiteboard kit according to claim 1, wherein: the first sliding roller (41) and the second sliding roller (42) are made of plastics.

10. The pull-reel flexible whiteboard kit according to claim 1, wherein: the first handwriting wiping plate (61) and the second handwriting wiping plate (62) are made of plastic, sponge and cloth.