CN2780485Y - Chalk cover for erasing writing integrated blackboard writing - Google Patents
Chalk cover for erasing writing integrated blackboard writing Download PDFInfo
- Publication number
- CN2780485Y CN2780485Y CN 200420097911 CN200420097911U CN2780485Y CN 2780485 Y CN2780485 Y CN 2780485Y CN 200420097911 CN200420097911 CN 200420097911 CN 200420097911 U CN200420097911 U CN 200420097911U CN 2780485 Y CN2780485 Y CN 2780485Y
- Authority
- CN
- China
- Prior art keywords
- writing
- chalk
- chalks
- blackboard
- sleeve body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a chalk sleeve with an integral function of erasing and writing used for writing on a blackboard, which is composed of a sleeve body 1 and a brush 4, wherein the side wall of the front end of the sleeve body 1 is fixedly provided with the brush 4, the back end of the sleeve body 1 is provided with an advancing mechanism 2 and the inner mouth edge point of the front end wall of the sleeve body 1 is fixedly provided with a hair device 3. Since the chalk sleeve with an integral function of erasing and writing used for writing on the blackboard combines chalks and a blackboard eraser into a whole, operation is flexible and convenient, and a writing error can be erased in time; since the chalks are put in the sleeve body, the fingers of a teacher can not be polluted by chalk dust, and the operation is sanitary; in addition, the extending of the chalks adopts an advancing type, so the chalks are not easy broken and the waste of the chalks is reduced.
Description
Technical field
The utility model relates to a kind of improvement of teaching aid, specifically a kind of erasable integral type writing on the blackboard chalk sleeve.
Background technology
In school instruction, chalk and blackboard eraser remain the most widely used teaching aid in the school, and this chalk and blackboard eraser are and separate are provided with, and its weak point is: the one, and the chalk frangibility, and chalk lacked very difficult usefulness, wastes bigger; The 2nd, the teacher hands chalk, can stick chalk powder on hand, not enough health; The 3rd, writing when clerical mistake occurring, need get blackboard eraser in addition and wipe, relatively lose time, also pretty troublesome, for accelerating to write, the teacher just wipes with finger sometimes, also health inadequately.
Summary of the invention
The purpose of this utility model is to provide a kind of deficiency that solves in the above technology, and simple in structure, and clerical mistake occurring can in time wipe, and does not influence writing speed, prevents the erasable integral type writing on the blackboard chalk sleeve that chalk fractures.
For reaching above purpose, the technical scheme that the utility model adopted is: this erasable integral type writing on the blackboard chalk sleeve, constitute by body, hairbrush, it is characterized in that on the body front end side wall, being fixed with hairbrush, so that can in time wipe when clerical mistake occurring, and needn't get blackboard eraser in addition, to save time, be provided with propulsive mechanism in the body rear end, to regulate the length of chalk in body, body front bulkhead internal orifice is fixed with pellet shot from a slingshot along the place, to choke chalk under the pellet shot from a slingshot effect, prevents that chalk is along skidding off in the body.The utility model is also implemented by following measure: described propulsive mechanism is made of screw rod, handle, pushing plate, and screw rod passes body aft bulkhead center screw fixedlys connected the fixedly connected handle of spiro rod rear end with the endoceliac pushing plate of cover; Described pellet shot from a slingshot is made of spring, steel ball, pellet shot from a slingshot shell, and spring is contained in the pellet shot from a slingshot shell, and steel ball is contained in the mouth edge of pellet shot from a slingshot shell, and sheath body is contained in the cylindrical cavity of body inwall, and pellet shot from a slingshot can be arranged 3-4 symmetrically.When using the utility model, chalk is filled in from the front end of body, with after short, the turn handle is released one section forward with chalk and is re-used and get final product at the chalk front end.
The beneficial effects of the utility model are: compare with blackboard eraser with the chalk of present use, because chalk and blackboard eraser be combined as a whole, thus flexible and convenient to use, meet clerical mistake and can in time wipe; Because chalk is in the body, no chalk powder pollutes teacher's finger, uses than health; Stretching out of chalk is push type in addition, so chalk frangibility has not reduced the waste of chalk.
Description of drawings
Fig. 1 looks schematic diagram for the utility model structure master.
Fig. 2 is that the utility model is along Figure 1A-A cross-sectional schematic.
Fig. 3 analyses and observe enlarged diagram for the utility model pellet shot from a slingshot.
The specific embodiment
Make the utility model with reference to accompanying drawing 1,2,3.This erasable integral type writing on the blackboard chalk sleeve is made of body 1, hairbrush 4, is fixed with hairbrush 4 on body 1 front end side wall, is provided with propulsive mechanism 2 in body 1 rear end, and body 1 front bulkhead internal orifice is fixed with pellet shot from a slingshot 3 along the place.Described propulsive mechanism 2 is made of screw rod 21, handle 22, pushing plate 23, and screw rod 21 passes body 1 aft bulkhead center screw fixedlys connected the fixedly connected handle 22 in screw rod 21 rear ends with the pushing plate 23 in body 1 chamber; Described pellet shot from a slingshot 3 is made of spring 31, steel ball 32, pellet shot from a slingshot shell 33, and spring 31 is contained in the pellet shot from a slingshot shell 33, and steel ball 32 is contained in the mouth edge of pellet shot from a slingshot shell 33, and pellet shot from a slingshot shell 33 is contained in the cylindrical cavity of body 1 inwall, and pellet shot from a slingshot 3 can be arranged 3-4 symmetrically.
Claims (2)
1, a kind of erasable integral type writing on the blackboard chalk sleeve, constitute by body (1), hairbrush (4), it is characterized in that being fixed with hairbrush (4) on body (1) front end side wall, be provided with propulsive mechanism (2) in body (1) rear end, body (1) front bulkhead internal orifice is fixed with pellet shot from a slingshot (3) along the place.
2, erasable integral type writing on the blackboard chalk sleeve according to claim 1, it is characterized in that described propulsive mechanism (2) is made of screw rod (21), handle (22), pushing plate (23), screw rod (21) passes body (1) aft bulkhead center screw fixedlys connected the fixedly connected handle in screw rod (21) rear end (22) with the pushing plate (23) in body (1) chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420097911 CN2780485Y (en) | 2004-11-30 | 2004-11-30 | Chalk cover for erasing writing integrated blackboard writing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420097911 CN2780485Y (en) | 2004-11-30 | 2004-11-30 | Chalk cover for erasing writing integrated blackboard writing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2780485Y true CN2780485Y (en) | 2006-05-17 |
Family
ID=36761682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420097911 Expired - Fee Related CN2780485Y (en) | 2004-11-30 | 2004-11-30 | Chalk cover for erasing writing integrated blackboard writing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2780485Y (en) |
-
2004
- 2004-11-30 CN CN 200420097911 patent/CN2780485Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |