CN204263777U - A kind of variable-size automatic blackboard - Google Patents
A kind of variable-size automatic blackboard Download PDFInfo
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- CN204263777U CN204263777U CN201420727649.9U CN201420727649U CN204263777U CN 204263777 U CN204263777 U CN 204263777U CN 201420727649 U CN201420727649 U CN 201420727649U CN 204263777 U CN204263777 U CN 204263777U
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- Prior art keywords
- blackboard
- lower fixed
- axis
- variable
- lifting shaft
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Abstract
The utility model discloses a kind of variable-size automatic blackboard, comprise support, lifting shaft, the elevating mechanism that lifting shaft can be driven to move up and down, central fixed shaft, lower fixed axis, movable axis and blackboard cloth; This elevating mechanism, central fixed shaft and lower fixed axis are installed on described support, and lifting shaft is positioned at top, and central fixed shaft is positioned at centre, and lower fixed axis is positioned at below; This blackboard cloth is ring-band shape, and it sequentially walks around lifting shaft, lower fixed axis, central fixed shaft, movable axis return lifting shaft, and this movable axis is positioned at the rear side of lower fixed axis.The utility model adopts the device of similar conveyer belt, changes blackboard area by electric pushrod, can be larger meet the requirement that class-teaching of teacher writes plate face.Coordinate a motor again, frictional force can be utilized to drive blackboard cloth to do cyclic rotation, not only can forward the plate face of not writing to front, can also conveniently realize automatic erasing function.
Description
Technical field
The utility model relates to a kind of blackboard for classroom or family expenses, espespecially a kind of variable-size automatic blackboard.
Background technology
At present, blackboard is as instrument conventional in school's daily teaching, and the daily teaching for teacher provides a lot of help, allows student more easily take notes simultaneously and improves learning efficiency.The material major part that normal blackboard uses is steel plate with baking paint character, writes the chalk that used main component is calcium carbonate and calcium sulfate.And the chalk dust using chalk to produce is totally unfavorable to the healthy of Faculty and Students.For this reason, market there is the product much normal blackboard improved, such as blank, electronic whiteboard, Glass blackboard etc.Although the blackboard of these improvement solves normal blackboard and easily produces some problems such as harmful material, but there is the problems such as mobile inconvenience.Blackboard position known is at present substantially fixing, and the function possessed is also comparatively single, and service efficiency is low, therefore needs to improve.
Can find out by carrying out retrieval to the prior art of blackboard or blank, this series products probably can be divided into following several:
The first, can the structure of automatic erasing, such as Authorization Notice No. is the Chinese utility model patent of CN201394995Y, disclose one " automatic erasing dust-free black board ", it can reach the function of writing on auto-erasing blackboard, saves teacher labour, improves classroom efficiency.
The second, the blackboard that can be elevated, such as Authorization Notice No. is the Chinese utility model patent of CN202727726U, discloses one " improvement blackboard ", which solves the problem of original blackboard movable up and down lifting difficulty.
3rd, the blackboard of variable-size, such as Authorization Notice No. is the Chinese utility model patent of CN203236911U, discloses " a kind of blackboard of variable write area ", it realizes increasing the usable floor area of blackboard by arranging the portable plate that can move horizontally, improve the efficiency of explanation of giving lessons.
Be not difficult to find out by case before above-mentioned patent, existing blackboard structure exists following not enough:
1. the blackboard of variable-size adopts laterally extending form, and floor space is comparatively large, and be difficult to realize automatic erasing function again;
2. liftable blackboard accommodation is less, generally only can be applied in classroom and wait fixed-site;
3. the blackboard of automatic erasing usually also can be difficult to realize variable-size, use and there is limitation.
Utility model content
Irremovable for traditional blackboard, size is immutable, topmost part is not easy to write the problems such as entire area utilization rate is low, and technical problem to be solved in the utility model is to provide a kind of and can move freely and can according to the automatic blackboard of the variable-size of teacher's increase in demand area.
Another technical problem to be solved in the utility model be to provide a kind of can automatic erasing and the automatic blackboard of variable-size.
For solving the problems of the technologies described above, technical solution of the present utility model is:
A kind of variable-size automatic blackboard, comprises support, lifting shaft, the elevating mechanism that lifting shaft can be driven to move up and down, central fixed shaft, lower fixed axis, movable axis and blackboard cloth; This elevating mechanism, central fixed shaft and lower fixed axis are installed on described support, and lifting shaft is positioned at top, and central fixed shaft is positioned at centre, and lower fixed axis is positioned at below; This blackboard cloth is ring-band shape, and it sequentially walks around lifting shaft, lower fixed axis, central fixed shaft, movable axis return lifting shaft, and this movable axis is positioned at the rear side of lower fixed axis.
Preferably, described elevating mechanism is electric pushrod.
Preferably, two parallel before and after described lifting shaft is provided with.
Preferably, described elevating mechanism is electric pushrod, and at each side installation electric pushrod of described support, described lifting shaft is arranged between two electric pushrods.
Preferably, two described electric pushrods are respectively provided with a contiguous block, contiguous block are provided with bearing block, are provided with bearing in bearing block, the two ends of described lifting shaft are arranged in bearing; Respectively arrange a drawer guideway on two electric pushrod sides, the fixture of this drawer guideway is arranged on described support, and its movable part is then fixed together with described contiguous block.
Preferably, described blackboard cloth adopts the PVC magnetic sheet of soft quality.
Preferably, spring is provided with between described movable axis and floor or support.
Preferably, comprise a motor that described lower fixed axis can be driven to rotate further, and described central fixed shaft is also for being rotatably installed on described support.
Preferably, described lower fixed axis and central fixed shaft are by installing bearing block on the bracket and bearing is arranged on this support.
Preferably, comprise blackboard eraser further, this blackboard eraser comprises wiping board, is connected to connecting rod with wiping board, and connecting rod is provided with axis hole; Described support is provided with blackboard eraser axle, this blackboard eraser axle is positioned at the below of described lower fixed axis, described blackboard eraser is arranged on this blackboard eraser axle by its axis hole, and after installing, wiping board is positioned at the rear of lower fixed axis, and is clamped condition to blackboard cloth together with lower fixed axis.
After adopting such scheme, the utility model has following effectively effect:
1. the utility model adopts four or five axles at three move in plane, the device of similar conveyer belt is formed with blackboard cloth, the movement in plane is realized by electric pushrod, wherein two axles are fixed irremovable, other two or three axles can move up and down, change blackboard area with this, can be larger meet the requirement that class-teaching of teacher writes plate face.If this variable-size blackboard changes little makings size into and just can use within the family in addition, head of a family's antithetical phrase woman is facilitated to be in teaching.
2. due to the utility model, to adopt the structure of similar conveyer belt to realize the size in plate face variable, under so only need arranging a driven by motor again, fixed axis rotates, frictional force can be utilized to drive blackboard cloth to do cyclic rotation, after rotation, not only can forward the plate face of not writing to front, to increase clipboard face, and by arranging a blackboard eraser again, can realize in the process of rotating, the plate face of having write being wiped.Whole process is without the need to manual intervention.This design is compared with existing blank, and blackboard panel is fully used and is saved teacher and cleans the time used without font.
3. the utility model can adopt the PVC magnetic sheet of soft quality as blackboard material, thus free ink pen can be used as the material writing writing on the blackboard.This design, compared with traditional normal blackboard, can not produce chalk dust, more be conducive to the healthy of teacher and student.
Accompanying drawing explanation
Fig. 1 is perspective view of the present utility model (before rising);
Fig. 2 is front view of the present utility model;
Fig. 3 is left view of the present utility model;
Fig. 4 is upward view of the present utility model;
Fig. 5 is the perspective view that the utility model removes blackboard cloth;
Fig. 6 is the perspective view after the utility model raises;
Fig. 7 is the structural representation of blackboard eraser described in the utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
What the utility model disclosed is a kind of variable-size automatic blackboard, as shown in Figures 1 to 5, is preferred embodiment of the present utility model.Described blackboard comprises support 1, lifting shaft 2, the elevating mechanism 3 that lifting shaft 2 can be driven to move up and down, central fixed shaft 4, lower fixed axis 5, movable axis 6 and blackboard cloth 7.Wherein:
Described elevating mechanism 3 is fixed on described support 1, and it can drive lifting shaft 2 to move up and down, and this elevating mechanism can adopt various structures to realize, such as cylinder etc.In the present embodiment, this elevating mechanism 3 is electric pushrod, in order to make lifting shaft 2 operate steadily, at each side installation electric pushrod of described support 1, can be arranged between two electric pushrods by described lifting shaft 2.
Described central fixed shaft 4 and lower fixed axis 5 are installed on described support 1, and described lifting shaft 2 is positioned at top, and described central fixed shaft 4 is positioned at centre, and described lower fixed axis 5 is positioned at below.
Described blackboard cloth 7 is ring-band shape, and it can adopt the PVC magnetic sheet of soft quality.This blackboard cloth 7 sequentially walks around lifting shaft 2, lower fixed axis 5, central fixed shaft 4, movable axis 6 return lifting shaft 2, and this movable axis 6 is not fixed, and it is positioned at the rear side of lower fixed axis 5.
When blackboard area will be expanded, press the switch of electric pushrod, electric pushrod is upwards extended, the lifting shaft 2 being positioned at top follows electric pushrod up to move, because the movable axis 6 of rear side is not fixed, but can freely move up and down, be hidden in the blackboard cloth 7 at rear so just along with the rising of lifting shaft 2 moves on to front, use for teacher, movable axis 6 is then elevated under the drive of blackboard cloth 7, in the process, stop by compressing switch at any time, electric pushrod can be made to stop at arbitrary height, thus the size of blackboard panel can be regulated according to the actual conditions of teacher, blackboard after rising state as shown in Figure 6.When reducing blackboard area, Push switch makes electric pushrod bounce back, and lifting shaft 2 declines, and the blackboard cloth 7 of rear side moves down under the pulling force of movable axis 6 self gravitation, makes the blackboard cloth 7 had more again be hidden in rear side.Further, can arrange a spring (not shown) between described movable axis 6 and floor or support 1, when can prevent electric pushrod from bouncing back like this, the shortage in weight of movable axis 6 declines to drive blackboard cloth 7, can improve the feasibility of mechanism.
Further, two parallel before and after described lifting shaft 2 can be arranged, the front and back width above blackboard cloth 7 can being increased like this, preventing blackboard cloth from having some setbacks when being elevated.In addition, in order to make rear side blackboard cloth 7 move up and down more smoothly, described lifting shaft 2 with rotatable structure installment on described elevating mechanism 3.The present embodiment respectively arranges a contiguous block 31, installation shaft bearing on contiguous block 31 on described two electric pushrods, installs bearing, be arranged in bearing at the two ends of lifting shaft 2, thus realize the smooth and easy rotation of lifting shaft 2 in bearing block.And this elevating mechanism 3 can arrange guide rail further, can adopt drawer guideway 32, and a drawer guideway 32 is respectively set on two electric pushrod sides.The fixture of this drawer guideway 32 is arranged on described support 1, and the movable part of this drawer guideway 32 is then fixed together with described contiguous block 31.Such lifting shaft 2, when being elevated, can moving up and down along guide rail, lifting shaft 2 be run more steady.
Blackboard described in the utility model can further include a motor 8 that described lower fixed axis 5 can be driven to rotate, and described central fixed shaft 4 is also for being rotatably installed on described support 1.For making the rotation of lower fixed axis 5 and central fixed shaft 4 more smooth and easy, by the relevant position installation shaft bearing of support 1 and bearing, then by bearing, lower fixed axis 5 and central fixed shaft 4 can be installed equally.
When motor 8 rotates, lower fixed axis 5 can be driven to rotate, when fixed axis 5 rotates instantly, blackboard cloth 7 can be driven to rotate together by frictional force, the cycle rotation of blackboard cloth 7 can be realized like this, make the blackboard cloth being positioned at rear side turn to front, thus can write area be increased.Further, rubber sleeve can be overlapped on each axle, to provide enough frictional force, blackboard cloth be done cyclic rotation.
Moreover in order to realize automatic erasing function, the utility model can also arrange blackboard eraser.As shown in Figure 7, it comprises wiping board 91, is connected to connecting rod 92 with wiping board 91 concrete structure of blackboard eraser 9, and connecting rod 91 is provided with axis hole 93.Described support 1 arranges blackboard eraser axle 11, this blackboard eraser axle 11 is positioned at the below of lower fixed axis 5, described blackboard eraser 9 is arranged on blackboard eraser axle 11 by its axis hole 93, and after installing, wiping board 91 is positioned at the rear of lower fixed axis 5, and together with lower fixed axis 5 to blackboard cloth 7 in clamped condition.When motor 8 rotates, blackboard cloth 7 also rotates, and rotation can be carried out wiping to the writing below it by such wiping board 91, reaches the object of automatic erasing.
The above, it is only preferred embodiment of the present utility model, not technical scope of the present utility model to be imposed any restrictions, therefore the change in every case done according to claim of the present utility model and description or modification, all should belong within scope that the utility model patent contains.
Claims (10)
1. a variable-size automatic blackboard, is characterized in that: comprise support (1), lifting shaft (2), the elevating mechanism (3) that lifting shaft (2) can be driven to move up and down, central fixed shaft (4), lower fixed axis (5), movable axis (6) and blackboard cloth (7); This elevating mechanism, central fixed shaft and lower fixed axis are installed on described support, and lifting shaft is positioned at top, and central fixed shaft is positioned at centre, and lower fixed axis is positioned at below; This blackboard cloth is ring-band shape, and it sequentially walks around lifting shaft, lower fixed axis, central fixed shaft, movable axis return lifting shaft, and this movable axis is positioned at the rear side of lower fixed axis.
2. a kind of variable-size automatic blackboard according to claim 1, is characterized in that: described elevating mechanism (3) is electric pushrod.
3. a kind of variable-size automatic blackboard according to claim 1, is characterized in that: two parallel before and after described lifting shaft (2) is provided with.
4. a kind of variable-size automatic blackboard according to claim 1 or 3, it is characterized in that: described elevating mechanism (3) is electric pushrod, and at each side installation electric pushrod of described support (1), described lifting shaft (2) is arranged between two electric pushrods.
5. a kind of variable-size automatic blackboard according to claim 4, it is characterized in that: two described electric pushrods are respectively provided with a contiguous block (31), contiguous block is provided with bearing block, is provided with bearing in bearing block, the two ends of described lifting shaft (2) are arranged in bearing; Respectively arrange a drawer guideway (32) on two electric pushrod sides, the fixture of this drawer guideway is arranged on described support (1), and its movable part is then fixed together with described contiguous block.
6. a kind of variable-size automatic blackboard according to claim 1, is characterized in that: described blackboard cloth (7) adopts the PVC magnetic sheet of soft quality.
7. a kind of variable-size automatic blackboard according to claim 1, is characterized in that: be provided with spring between described movable axis (6) and floor or support (1).
8. according to a kind of variable-size automatic blackboard one of claim 1-3,5-7 Suo Shu, it is characterized in that: comprise a motor (8) that described lower fixed axis (5) can be driven to rotate further, and described central fixed shaft (4) is also for being rotatably installed on described support (1).
9. a kind of variable-size automatic blackboard according to claim 8, is characterized in that: described lower fixed axis (5) and central fixed shaft (4) are by being arranged on bearing block on described support (1) and bearing is arranged on this support.
10. a kind of variable-size automatic blackboard according to claim 8, is characterized in that: comprise blackboard eraser (9) further, and this blackboard eraser comprises wiping board (91), is connected to connecting rod (92) with wiping board (91), and connecting rod is provided with axis hole (93); Described support (1) is provided with blackboard eraser axle (11), this blackboard eraser axle is positioned at the below of described lower fixed axis (5), described blackboard eraser is arranged on this blackboard eraser axle by its axis hole, and wiping board (91) is positioned at the rear of lower fixed axis after installing, and together with lower fixed axis to blackboard cloth (7) in clamped condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420727649.9U CN204263777U (en) | 2014-11-28 | 2014-11-28 | A kind of variable-size automatic blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420727649.9U CN204263777U (en) | 2014-11-28 | 2014-11-28 | A kind of variable-size automatic blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204263777U true CN204263777U (en) | 2015-04-15 |
Family
ID=52798671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420727649.9U Expired - Fee Related CN204263777U (en) | 2014-11-28 | 2014-11-28 | A kind of variable-size automatic blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204263777U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106827882A (en) * | 2017-03-05 | 2017-06-13 | 刘金凤 | A kind of teaching aid of self-cleaning |
| CN111348080A (en) * | 2020-04-21 | 2020-06-30 | 宁波富美光电科技有限公司 | Multifunctional lifting cart |
| CN111775593A (en) * | 2020-06-15 | 2020-10-16 | 安徽机电职业技术学院 | Rolling type whiteboard for teaching |
-
2014
- 2014-11-28 CN CN201420727649.9U patent/CN204263777U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106827882A (en) * | 2017-03-05 | 2017-06-13 | 刘金凤 | A kind of teaching aid of self-cleaning |
| CN111348080A (en) * | 2020-04-21 | 2020-06-30 | 宁波富美光电科技有限公司 | Multifunctional lifting cart |
| CN111775593A (en) * | 2020-06-15 | 2020-10-16 | 安徽机电职业技术学院 | Rolling type whiteboard for teaching |
| CN111775593B (en) * | 2020-06-15 | 2022-07-05 | 安徽机电职业技术学院 | Rolling type whiteboard for teaching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20151128 |