CN216885974U

CN216885974U - Adjustable blackboard and automatic blackboard eraser

Info

Publication number: CN216885974U
Application number: CN202122288140.1U
Authority: CN
Inventors: 孙褚红
Original assignee: Shandong Huayu University of Technology
Current assignee: Shandong Huayu University of Technology
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-07-05
Anticipated expiration: 2031-09-22

Abstract

An adjustable blackboard and an automatic blackboard eraser effectively solve the problems that a blackboard and a projection screen can be mutually influenced when being matched for use, the use mode is not flexible enough, in addition, the blackboard is wiped manually, the wiping time is long, and the teaching time of teachers is influenced; including support frame, blackboard plate and projection curtain, support frame middle part fixedly connected with division board, two crisscross the left side of placing at the division board around the blackboard plate, it has two guide ways with blackboard plate sliding connection to open on the support frame, the guide way with install the stopper between the blackboard plate, the projection curtain is located the right side of division board, support frame and blackboard plate fixed connection of projection curtain below, the support frame front side is equipped with mobilizable blackboard eraser.

Description

Adjustable blackboard and automatic blackboard eraser

Technical Field

The utility model relates to the technical field of educational appliances, in particular to an adjustable blackboard and an automatic blackboard eraser.

Background

School's lessons, teacher writes the mathematics subject with the blackboard more, current blackboard is if the less needs of specification and dimension are continuous write and clean, specification and dimension is big, the user receives the restriction of self height when using, can't write comprehensively to the blackboard, the limited utilization ratio of blackboard is not high, write simultaneously and clean the in-process, all need the manual work to go on, can waste a large amount of time and the amount of labour at this process, the time of every lesson is limited when teaching, a large amount of clean and write the time that has reduced the teaching, the efficiency of user teaching has been influenced, in addition, along with the progress of science and technology, partial class has the projection, teacher uses the projection on one side, use the blackboard on one side, there is interference between the two, it has the defect to cooperate the use again.

SUMMERY OF THE UTILITY MODEL

Aiming at the situation, the utility model provides the adjustable blackboard and the automatic blackboard eraser to overcome the defects of the prior art, and the problems that the blackboard and the projection curtain can be mutually influenced when being matched for use, the use mode is not flexible enough, in addition, the blackboard is required to be manually erased, the erasing time is long, and the teaching time of teachers is influenced are effectively solved through the design.

In order to achieve the purpose, the utility model provides the following technical scheme: the blackboard comprises a support frame, blackboard plates and a projection curtain, wherein the middle part of the support frame is fixedly connected with a partition plate, the two blackboard plates are staggered in the front and back direction on the left side of the partition plate, the support frame is provided with two guide grooves in sliding connection with the blackboard plates, a limiter is arranged between the guide grooves and the blackboard plates, the projection curtain is positioned on the right side of the partition plate, the support frame below the projection curtain is fixedly connected with the blackboard plates, and the front side of the support frame is provided with a movable blackboard eraser.

Preferably, the stopper comprises a limiting groove positioned in the guide groove, the limiting groove is matched with a limiting block in sliding connection with the blackboard plate, the rear side of the limiting block is fixedly connected with a sliding block, a through hole is formed in the sliding block, a sliding rod capable of vertically sliding is connected in the through hole in a sliding manner, a connecting pin is fixedly connected to the sliding rod, the connecting pin is matched with an oblique sliding groove positioned on the sliding block, and the sliding rod penetrates through the blackboard plate and is in sliding connection with the blackboard plate;

the limiting block and the sliding block are provided with a connecting rod in sliding connection with the blackboard plate, and the connecting rod is sleeved with a first spring.

Preferably, the bottom of the sliding rod is fixedly connected with a first rectangular plate, the first rectangular plate is fixedly connected with a first support rod in sliding connection with the blackboard plate, the first support rod is sleeved with a second spring, and the bottom of the first rectangular plate is provided with trundles matched with the guide grooves.

Preferably, the front side of the blackboard block is fixedly connected with a connecting piece, and a gasket is arranged on the connecting piece.

Preferably, the left side of the support frame is rotatably connected with a rotatable first screw rod, the first screw rod is in threaded connection with a first connecting block in sliding connection with the support frame, the first connecting block is fixedly connected with a first telescopic rod, and the first telescopic rod is fixedly connected with the left side of the blackboard eraser;

the blackboard eraser is characterized in that a second telescopic rod is fixedly connected to the upper side of the blackboard eraser, a second connecting block is fixedly connected to the other end of the second telescopic rod, a second lead screw in rotating connection with the supporting frame is in threaded connection with the second connecting block, and the second connecting block is in sliding connection with the supporting frame.

Preferably, a second rectangular plate is arranged at the bottom of the blackboard eraser, a second supporting rod is fixedly connected to the upper portion of the second rectangular plate, a third spring is sleeved on the second supporting rod, a friction strip is installed at the bottom of the second supporting rod, and a roller is rotatably connected to the second rectangular plate in the middle of the friction strip.

Preferably, the bottom of the support frame is rotatably connected with an arc-shaped containing plate, the containing plate is fixedly connected with a worm wheel, the worm wheel is meshed with a worm rotatably connected with the support frame, and the width of the containing plate is larger than the thickness of the support frame.

Preferably, the side edge of the support frame is fixedly connected with a positioning sheet, and the positioning sheet is provided with a mounting hole.

Compared with the prior art, the utility model has the outstanding advantages that: the blackboard plate and the projection curtain are arranged in the support frame, the projection curtain and the blackboard plate are not interfered with each other, the blackboard plate and the projection curtain are prevented from being influenced with each other when in use, the two blackboard plates on the left side can slide up and down and can be freely adjusted, a user can write conveniently, and the convenience degree of the device when in use is improved; the blackboard eraser is controlled by the first screw rod and the second screw rod which are connected with the single chip microcomputer, automatic wiping can be achieved, time waste in the aspect is avoided, and working efficiency of a user is improved; the blackboard eraser has the advantages of novel structure, ingenious design and simple and convenient operation, and effectively solves the problems that the blackboard and the projection curtain can be mutually influenced when being matched for use, the use mode is not flexible enough, in addition, the blackboard eraser needs to be manually operated when being used for erasing the blackboard, the erasing time is longer, and the teaching time of teachers is influenced.

Drawings

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

FIG. 2 is a schematic view of a partial structure of the support frame of the present invention.

FIG. 3 is a schematic diagram of the blackboard plate structure of the present invention.

FIG. 4 is a schematic sectional view of the blackboard plate according to the present invention.

FIG. 5 is a schematic view of a slider connection structure according to the present invention.

FIG. 6 is an enlarged view of A in FIG. 1 according to the present invention.

FIG. 7 is an enlarged view of B in FIG. 2 according to the present invention.

Fig. 8 is a schematic cross-sectional view of a portion of the blackboard eraser of the present invention.

Reference numbers in the figures: 1. a support frame; 2. a blackboard block; 3. a projection screen; 4. a partition plate; 5. a guide groove; 6. a blackboard eraser; 7. a limiting groove; 8. a limiting block; 9. a slider; 10. a through hole; 11. a slide bar; 12. a connecting pin; 13. a chute; 14. a connecting rod; 15. a first spring; 16. a first rectangular plate; 17. a first support bar; 18. a second spring; 19. a caster wheel; 20. connecting sheets; 21. a first lead screw; 22. a first connection block; 23. a first telescopic rod; 24. a second telescopic rod; 25. a second connecting block; 26. a second lead screw; 27. a second rectangular plate; 28. a second support bar; 29. a third spring; 30. rubbing the strips; 31. a roller; 32. a storage plate; 33. a worm gear; 34. a worm; 35. and (6) a positioning sheet.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings 1 to 8.

The blackboard comprises a support frame 1, blackboard plates 2 and a projection curtain 3, wherein a partition plate 4 is fixedly connected to the middle of the support frame 1, the two blackboard plates 2 are staggered in the front and back direction on the left side of the partition plate 4, two guide grooves 5 connected with the blackboard plates 2 in a sliding manner are formed in the support frame 1, a stopper is arranged between each guide groove 5 and each blackboard plate 2, the projection curtain 3 is positioned on the right side of the partition plate 4, the support frame 1 below the projection curtain 3 is fixedly connected with the blackboard plates 2, and a movable blackboard eraser 6 is arranged on the front side of the support frame 1.

The blackboard blocks 2 are three, the projection screen 3 is one, the projection screen 3 and the blackboard blocks 2 have the same specification and occupy one of four wind directions of the support frame 1, and the two blackboard blocks 2 on the left side of the partition plate can slide up and down relative to the support frame 1 and the partition plate, so that when the blackboard blocks 2 on the upper side are written, the blackboard blocks 2 on the upper side can be moved down, a user can write conveniently, the blackboard blocks can be moved up after writing is finished, the blackboard blocks can be conveniently watched by students in the back row, meanwhile, the size of the blackboard is increased, the user can write more conveniently, and the teaching efficiency is improved; blackboard plate 2 and projection curtain 3 on baffle right side are fixed, and the position that is located 2 upsides of blackboard plate of projection curtain 3, the field of vision is wider, and blackboard plate 2 on baffle right side is fixed simultaneously and can avoid sheltering from of blackboard plate 2 to projection curtain 3, and blackboard plate 2 also can supply the user to carry out the blackboard writing simultaneously, increases the utilization ratio of 1 inner space of support frame.

The limiting device comprises a limiting groove 7 positioned in a guide groove 5, the limiting groove 7 is matched with a limiting block 8 in sliding connection with the blackboard plate 2, the rear side of the limiting block 8 is fixedly connected with a sliding block 9, a through hole 10 is formed in the sliding block 9, a sliding rod 11 capable of vertically sliding is connected in the through hole 10 in a sliding mode, a connecting pin 12 is fixedly connected on the sliding rod 11, the connecting pin 12 is matched with an inclined sliding groove 13 positioned on the sliding block 9, and the sliding rod 11 penetrates through the blackboard plate 2 and is in sliding connection with the blackboard plate 2;

a connecting rod 14 connected with the blackboard plate 2 in a sliding manner is arranged between the limiting block 8 and the sliding block 9, and a first spring 15 is sleeved on the connecting rod 14; the blackboard eraser is characterized in that a first rectangular plate 16 is fixedly connected to the bottom of the sliding rod 11, a first supporting rod 17 which is connected with the blackboard plate 2 in a sliding mode is fixedly connected to the first rectangular plate 16, a second spring 18 is sleeved on the first supporting rod 17, and a caster wheel 19 matched with the guide groove 5 is installed at the bottom of the first rectangular plate 16.

The two guide grooves 5 are distributed in a staggered manner from front to back, the two blackboard plates 2 are respectively arranged in the different guide grooves 5, the limiting groove 7 is positioned in the guide groove 5 and distributed at each position, and the limiting block 8 and the sliding block 9 are both positioned in the blackboard plates 2 and only have sliding freedom with the blackboard plates 2; as shown in fig. 4, 5 and 7, in an initial state, the first spring 15 applies a left-side elastic force to the limit block 8, so that the limit block 8 is engaged with the limit groove 7, and the connecting rod 14 drives the slider 9 to move to a leftmost position where the slider 9 can slide in the blackboard plate 2, when the blackboard plate 2 needs to be moved, by pressing the blackboard plate 2, the blackboard plate 2 moves downward relative to the sliding rod 11 after being stressed, and the slider 9 also moves downward relative to the sliding rod 11, and under the engagement of the through hole 10, the sliding groove 13, the sliding rod 11 and the connecting pin 12, the slider 9 in the blackboard plate 2 moves rightward, and when the slider 9 moves rightward, the connecting rod 14 drives the limit block 8 to move rightward, so that the limit block 8 is disengaged from the limit groove 7, and then the blackboard plate 2 can be pushed to vertically move in the sliding groove 13, after moving, the first spring 15 pushes the limiting block 8 to be matched with the limiting groove 7, and the position at the moment is fixed; the first shaft support rod and the second spring 18 ensure that only the sliding freedom degree exists between the blackboard plate 2 and the first rectangular plate 16, the moving track of the blackboard plate is ensured, the caster wheel 19 can reduce the friction force of the blackboard plate 2 when the blackboard plate slides in the guide groove 5, and a user can conveniently push and adjust the blackboard plate.

The front side of the blackboard plate 2 is fixedly connected with a connecting sheet 20, and a gasket is arranged on the connecting sheet 20.

The connecting piece 20 is made of metal and mainly used for reinforcing the blackboard plate 2.

A rotatable first screw rod 21 is rotatably connected to the left side of the support frame 1, a first connecting block 22 which is slidably connected with the support frame 1 is in threaded connection with the first screw rod 21, a first telescopic rod 23 is fixedly connected to the first connecting block 22, and the first telescopic rod 23 is fixedly connected with the left side of the blackboard eraser 6;

the blackboard eraser is characterized in that a second telescopic rod 24 is fixedly connected to the upper side of the blackboard eraser 6, a second connecting block 25 is fixedly connected to the other end of the second telescopic rod 24, a second lead screw 26 rotatably connected with the support frame 1 is in threaded connection with the second connecting block 25, and the second connecting block 25 is in sliding connection with the support frame 1.

The first lead screw 21 and the second lead screw 26 are connected with motors in a distinguishing mode, the motors are controlled by a single chip microcomputer, the motors drive the first lead screw 21 and the second lead screw 26 to rotate asynchronously, the first telescopic rod 23 and the second telescopic rod 24 are telescopic rods without self-locking, only sliding freedom degrees exist between the first connecting block 22 and the second connecting block 25 and the support frame 1, when the first lead screw 21 rotates, the first lead screw 21 drives the blackboard eraser 6 to move in the vertical direction through the first connecting block 22 and the first telescopic rod 23, when the second lead screw 26 rotates, the second lead screw 26 drives the blackboard eraser 6 to move in the left-right direction through the second connecting block 25 and the second telescopic rod 24, therefore, the blackboard eraser 6 can automatically wipe the blackboard plates 2, the workload of a user is reduced, and the teaching efficiency is improved.

The bottom of the blackboard eraser 6 is provided with a second rectangular plate 27, the upper portion of the second rectangular plate 27 is fixedly connected with a second support rod 28, a third spring 29 is sleeved on the second support rod 28, a friction strip 30 is installed at the bottom of the second support rod 28, and a roller 31 is rotatably connected in the second rectangular plate 27 in the middle of the friction strip 30.

Third spring 29 has decurrent elasticity to second rectangular plate 27, guarantee that the friction strip 30 of second rectangular plate 27 downside can contact with blackboard plate 2 all the time, guarantee the effect of wiping, the second bracing piece 28 of upside has the guide effect to the removal of second rectangular plate 27 on the second rectangular plate 27, guarantee that second rectangular block can follow blackboard eraser 6 and receive the regulation and control of first telescopic link 23 and second telescopic link 24, frictional force when gyro wheel 31 can reduce blackboard eraser 6 and remove, when the guarantee wiped the effect, avoid the too much loss of energy.

But support frame 1 bottom is rotated and is connected with curved storage plate 32, fixedly connected with worm wheel 33 on the storage plate 32, worm wheel 33 meshes has the worm 34 of being connected with support frame 1 rotation, the width of storage plate 32 is greater than the thickness of support frame 1.

Storage plate 32 is the arc structure of perk upwards, and storage plate 32 is located support frame 1 below, mainly collects the chalk powder after cleaning, and the angularly adjustable between storage plate 32 and the support frame 1 to the convenience is arranged in order and is cleaned storage plate 32 inside.

The side fixedly connected with spacer 35 of support frame 1, it has the mounting hole to open on the spacer 35.

The spacer 35 all has the distribution around the support frame 1, and the mounting hole is used for installing set screw, fixes support frame 1 on the wall through set screw.

The blackboard eraser has the advantages of novel structure, ingenious design and simple and convenient operation, and effectively solves the problems that the blackboard and the projection curtain 3 can be mutually influenced when being matched for use, the use mode is not flexible enough, in addition, the blackboard eraser 6 needs to be manually wiped, the wiping time is long, and the teaching time of teachers is influenced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides an adjustable blackboard and automatic blackboard eraser (6), includes support frame (1), blackboard plate (2) and projection curtain (3), its characterized in that, support frame (1) middle part fixedly connected with division board (4), two crisscross the left side of placing at division board (4) around blackboard plate (2), it has two guide way (5) with blackboard plate (2) sliding connection to open on support frame (1), guide way (5) with install the stopper between blackboard plate (2), projection curtain (3) are located the right side of division board (4), support frame (1) and blackboard plate (2) fixed connection of projection curtain (3) below, support frame (1) front side is equipped with mobilizable blackboard eraser (6).

2. The adjustable blackboard and automatic blackboard eraser (6) according to claim 1, wherein the stopper includes a limiting groove (7) located in the guide groove (5), the limiting groove (7) is fitted with a limiting block (8) slidably connected with the blackboard plate (2), the rear side of the limiting block (8) is fixedly connected with a sliding block (9), a through hole (10) is formed in the sliding block (9), a sliding rod (11) capable of vertically sliding is slidably connected in the through hole (10), a connecting pin (12) is fixedly connected to the sliding rod (11), the connecting pin (12) is fitted with an oblique sliding groove (13) located on the sliding block (9), and the sliding rod (11) penetrates through the blackboard plate (2) and is slidably connected with the blackboard plate (2);

a connecting rod (14) which is connected with the blackboard plate (2) in a sliding manner is arranged between the limiting block (8) and the sliding block (9), and a first spring (15) is sleeved on the connecting rod (14).

3. The adjustable blackboard and automatic blackboard eraser (6) according to claim 2, wherein the bottom of the sliding rod (11) is fixedly connected with a first rectangular plate (16), the first rectangular plate (16) is fixedly connected with a first supporting rod (17) which is slidably connected with the blackboard plate (2), the first supporting rod (17) is sleeved with a second spring (18), and the bottom of the first rectangular plate (16) is provided with a caster (19) which is matched with the guide groove (5).

4. An adjustable blackboard and automatic blackboard eraser (6) according to claim 1, characterised in that the front side of the blackboard plate (2) is fixedly connected with a connecting piece (20), the connecting piece (20) is equipped with a spacer.

5. The adjustable blackboard and automatic blackboard eraser (6) according to claim 1, wherein a rotatable first lead screw (21) is rotatably connected to the left side of the support frame (1), a first connecting block (22) slidably connected with the support frame (1) is connected to the first lead screw (21) in a threaded manner, a first telescopic rod (23) is fixedly connected to the first connecting block (22), and the first telescopic rod (23) is fixedly connected to the left side of the blackboard eraser (6);

blackboard eraser (6) upside fixedly connected with second telescopic link (24), second telescopic link (24) other end fixedly connected with second connecting block (25), second connecting block (25) threaded connection have with support frame (1) rotate second lead screw (26) of being connected, second connecting block (25) with support frame (1) sliding connection.

6. The adjustable blackboard and automatic blackboard eraser (6) according to claim 1 or 5, characterized in that a second rectangular plate (27) is arranged at the bottom of the blackboard eraser (6), a second support rod (28) is fixedly connected to the upper portion of the second rectangular plate (27), a third spring (29) is sleeved on the second support rod (28), a friction strip (30) is installed at the bottom of the second support rod (28), and a roller (31) is rotatably connected to the second rectangular plate (27) in the middle of the friction strip (30).

7. The adjustable blackboard and automatic blackboard eraser (6) according to claim 1, wherein the bottom of the support frame (1) is rotatably connected with a receiving plate (32) which can be curved, the receiving plate (32) is fixedly connected with a worm wheel (33), the worm wheel (33) is engaged with a worm (34) rotatably connected with the support frame (1), and the width of the receiving plate (32) is greater than the thickness of the support frame (1).

8. The adjustable blackboard and automatic blackboard eraser (6) according to claim 1, wherein a positioning plate (35) is fixedly connected to a side edge of the support frame (1), and a mounting hole is formed on the positioning plate (35).