CN2693480Y - Semi-automatic chalk cover - Google Patents
Semi-automatic chalk cover Download PDFInfo
- Publication number
- CN2693480Y CN2693480Y CN 200420035531 CN200420035531U CN2693480Y CN 2693480 Y CN2693480 Y CN 2693480Y CN 200420035531 CN200420035531 CN 200420035531 CN 200420035531 U CN200420035531 U CN 200420035531U CN 2693480 Y CN2693480 Y CN 2693480Y
- Authority
- CN
- China
- Prior art keywords
- chalk
- semi
- shell
- cover
- impetus
- 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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Abstract
The utility model relates to a semi-automatic chalk sleeve, comprising a housing. The inner part of the housing is provided with a cushion collar. The housing and the cushion collar are provided with grooves in which a pushing rod is arranged. A force point sleeve is sheathed on the front end of the housing. The utility model has the advantages of uneasy breaking off in use, simple structure and beautiful appearance, and can ensure the full utilization of a chalk on the premise of convenient writing.
Description
Technical field
The utility model relates to a kind of semi-automatic chalk sleeve.
Background technology
Chalk is an indispensable instrument in the teaching process, all is with finger contact chalk when teacher writes in teaching.Because the main component of chalk is quick lime and gypsum, when human body skin Long contact time chalk, the sweat that skin oozed out just produces chemical action with quick lime, generates alkalescent material calcium hydroxide, human body skin there is corrosiveness, is unfavorable for the health of human body.In writing process, if chalk is long with regard to frangibility, and too shortly to be inconvenient to write, therefore a lot of chalks have just still fallen after using 2/3rds, have so just caused waste, also are not easy to carry simultaneously.
Summary of the invention
Technical problem to be solved in the utility model is at the deficiencies in the prior art, a kind of semi-automatic chalk sleeve is provided, thereby this chalk sleeve can make people's both hands directly not contact with chalk and avoid the erosion human body skin, and can improve the utilization rate of chalk, avoids waste.
The technical scheme that solution the utility model technical problem is adopted is this semi-automatic chalk sleeve, comprises shell, and shell is built-in with cushion collar, has groove on shell and the cushion collar, and push rod is arranged in the groove.The impetus condom is arranged in the shell front end.
The utility model in use, chalk is frangibility not, and can guarantee to guarantee under the prerequisite that chalk can use up substantially writing easily.
Description of drawings
Below in conjunction with the embodiment accompanying drawing, the utility model is described in further detail.
Fig. 1 is a structural front view of the present utility model
Among the figure: 1-impetus cover 2-groove 3-cushion collar 4-shell 5-push rod 6-chalk goes out head end
The specific embodiment
In the present embodiment, shell of the present utility model (4) adopts organic plastics to make, and the length of shell (4) is 8.5cm, and the thickness of shell (4) is 0.1cm, and internal diameter is 1.1cm.Shell (4) is built-in with cushion collar (3), and cushion collar (3) is used to encase chalk.Cushion collar (3) is made by flexible plastic, and the frictional force size degree between its material and chalk should guarantee: when vertically holding shell (4) under the situation that the external diameter and cushion collar (3) internal diameter of chalk equates, chalk can not drop out.The length of cushion collar (3) is 8.5cm, and thickness is 0.1cm.Have groove (2) on the shell (4), the length of groove (2) is 5.5cm, and width is 0.2cm.Groove (2) is 0.5cm from the distance that chalk goes out head end (6), and push rod (5) is arranged in the groove (2), and push rod (5) is used to promote chalk and moves to chalk outlet end (6).Have impetus cover (1) to be placed in the front end of shell (4), impetus cover (1) adopts medium-hard plastic production, and its hardness should guarantee: the people points when writing with chalk word and is holding impetus cover (1), and impetus cover (1) can not cave in into.The length of impetus cover (1) is 1.5cm, and width is 0.5cm, and its external diameter matches with the internal diameter of shell (4).The front end of impetus cover (1) is 0.5cm from the distance that chalk goes out head end (6).The both sides that impetus cover (1) is gone up groove (2) have two breach symmetrically, when the user hold chalk the time, thumb and forefinger place respectively in two breach, be convenient to better fixedly chalk, when writing, the stress point of chalk just in time falls within this section chalk that impetus cover (1) entangles, like this chalk frangibility not just.
During use, specification according to a complete chalk: long 6.5cm, external diameter is 1cm, chalk from chalk lift one's head (6) pack in the cushion collar (3), adjust chalk and only expose one section that is fit to write, simultaneously the thumb of staff and forefinger are placed respectively in two breach of impetus cover (1) and hold chalk, just can write.After the one section chalk that exposes uses up, promote push rod (5) forward, chalk moves forward, and after exposing one section suitable chalk, can proceed again to write.Shift groove (2) onto foremost up to push rod (5) like this,, just can not promote push rod again and (5), just show also that simultaneously this root chalk uses up substantially if the one section chalk that at this moment exposes uses up.When not using after having write, can in shell (4), push away chalk, in the whole retraction shells of chalk (4), so just can carry chalk easily, the clothing of can not making dirty.
The utility model is simple in structure, light and handy, and the while is at the mountable different colors and the pattern of being decorated with of shell (4), to increase aesthetic property.
Claims (9)
1, a kind of semi-automatic chalk sleeve comprises shell (4), it is characterized in that shell (4) is built-in with cushion collar (3), has groove (2) on shell (4) and the cushion collar (3), and push rod (5) is arranged in the groove (2).
2, semi-automatic chalk sleeve according to claim 1 is characterized in that having impetus cover (1) to be placed in the front end of shell (4).
3, semi-automatic chalk sleeve according to claim 2 is characterized in that impetus cover (1) upward has two breach in the both sides of groove (2) symmetrically.
4, semi-automatic chalk sleeve according to claim 2 is characterized in that the front end of impetus cover (1) is 0.5cm from the distance that chalk goes out head end (6).
5, semi-automatic chalk sleeve according to claim 2, the length that it is characterized in that impetus cover (1) is 1.5cm.
6, semi-automatic chalk sleeve according to claim 1, the length that it is characterized in that groove (2) is 5.5cm, width is 0.2cm.
7, semi-automatic chalk sleeve according to claim 1, the thickness that it is characterized in that shell (4) is 0.1cm, internal diameter is 1.1cm.
8, semi-automatic chalk sleeve according to claim 1, the thickness that it is characterized in that cushion collar (3) is 0.1cm.
9, semi-automatic chalk sleeve according to claim 1 is characterized in that groove (2) is 0.5cm from the distance that chalk goes out head end (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420035531 CN2693480Y (en) | 2004-04-05 | 2004-04-05 | Semi-automatic chalk cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420035531 CN2693480Y (en) | 2004-04-05 | 2004-04-05 | Semi-automatic chalk cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2693480Y true CN2693480Y (en) | 2005-04-20 |
Family
ID=34773277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420035531 Expired - Fee Related CN2693480Y (en) | 2004-04-05 | 2004-04-05 | Semi-automatic chalk cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2693480Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275964A (en) * | 2013-07-03 | 2015-01-14 | 章惠 | Automatic chalk sleeve |
-
2004
- 2004-04-05 CN CN 200420035531 patent/CN2693480Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275964A (en) * | 2013-07-03 | 2015-01-14 | 章惠 | Automatic chalk sleeve |
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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 |