CN104118245A - Chalk saving clamping device - Google Patents
Chalk saving clamping device Download PDFInfo
- Publication number
- CN104118245A CN104118245A CN201310145945.8A CN201310145945A CN104118245A CN 104118245 A CN104118245 A CN 104118245A CN 201310145945 A CN201310145945 A CN 201310145945A CN 104118245 A CN104118245 A CN 104118245A
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- CN
- China
- Prior art keywords
- chalk
- inner tube
- inner pipe
- notches
- push rod
- 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.)
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Abstract
The invention discloses a chalk saving clamping device which comprises an inner pipe, an outer pipe and a push rod. External threads are arranged on the surface of the inner pipe. Internal threads matched with the external threads are arranged on the inner surface of the outer pipe. Multiple notches are formed in the front end of the inner pipe. A cover cap is arranged at the rear end of the inner pipe. An external slope is arranged at the front end of the inner pipe and located near the notches. An internal slope matched with the external slope is correspondingly arranged at the front end of the outer pipe. The push rod is fixedly connected with the rear end of the inner pipe. Compared with a mode that a chalk is directly held by hand for writing currently, the chalk saving clamping device has the advantages that waste is reduced, the chalk use rate is improved, use is convenient, and the device is simple in structure, low in manufacturing cost, suitable for most schools and training institutions and capable of improving the use condition of chalks to a great extent.
Description
Technical field
The present invention relates to the auxiliary Yongping of a kind of teaching, particularly a kind of chalk that is applicable to chalk recycling is saved and is accommodated device.
Background technology
Chalk is the instrument widely using in daily life, is generally used for book and writes on the blackboard.The chalk in ancient times is made with natural chalk conventionally, but multiplex other material replacement now.The composition of chalk is a kind of white depositions of calcium sulfate, is not easy to be decomposed, and particle is larger than dust.Now, the chalk of domestic use mainly contains two kinds of common chalk and dust-free chalks, and its main component is calcium carbonate (lime stone) and calcium sulfate (gypsum), or containing a small amount of calcium oxide, in school and machine-operated training process, serve as a teacher hand-held chalk-writing at need at present, just chalk is thrown away, but throw away unfortunately, cause waste, continue to use so some teachers just pinch chalk, the time has been grown, finger ache, is used very inconvenient.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides one simple in structure, cut the waste, improve the chalk of chalk utilization rate and save blessing device.
The present invention for the technical scheme that solves its technical problem and adopt is: a kind of chalk is saved and accommodated device, comprise inner tube, outer tube and push rod, the surface of described inner tube is provided with external screw thread, the inner surface of described outer tube is provided with the internal thread mating with external screw thread, the front end of described inner tube is provided with some notches, the rear end of described inner tube is provided with block, the front end of inner tube is also provided with an outer gradient near being also provided with and being positioned at notch, the front end of corresponding outer tube is provided with the interior gradient of mating with outer gradient, and described push rod is fixedly connected with the rear end of inner tube.
As a further improvement on the present invention, the front end of described inner tube is provided with three notches, and three notches are uniformly distributed along inner tube excircle.
As a further improvement on the present invention, the front end of described outer tube is provided with fixing collar.
The invention has the beneficial effects as follows: the present invention is compared with directly writing with hand-held chalk end at present, have and cut the waste, improve chalk utilization rate, advantage easy to use, and this apparatus structure is simple, cost of manufacture is cheap, is applicable to most school and training organization, can significantly improve the behaviour in service of chalk waste.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
In figure, indicate: 1-inner tube; 2-outer tube; 3-push rod; 4-notch; 5-block; The outer gradient of 6-; Gradient in 7-; 8-fixing collar.
Detailed description of the invention
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.
Fig. 1 has shown a kind of chalk of the present invention and has saved a kind of embodiment that accommodates device, comprise inner tube 1, outer tube 2 and push rod 3, the surface of described inner tube 1 is provided with external screw thread, the inner surface of described outer tube 2 is provided with the internal thread mating with external screw thread, the front end of described inner tube 1 is provided with some notches 4, the rear end of described inner tube 1 is provided with block 5, the front end of inner tube 1 is also provided with an outer gradient 6 near being also provided with and being positioned at notch 4, the front end of corresponding outer tube 2 is provided with the interior gradient 7 of mating with outer gradient, described push rod 3 is fixedly connected with the rear end of inner tube 1, the front end of described inner tube 1 is provided with three notches 4, three notches 4 are uniformly distributed along inner tube 1 excircle, the front end of described outer tube 2 is provided with fixing collar 8.
When use, first open the block 5 of inner tube 1, chalk end is packed in inner tube 1, then rotate outer tube 2, promoting chalk end with push rod 3 moves forward, when chalk end rear end is pushed into inner tube 1 front end, be advisable seizing on both sides by the arms, then dextrorotation outer tube 2, outer tube 2 reaches make the gradient compression inner tube 1 of inner side, chalk end is stepped up, and the hand-held outer tube 2 of teacher writes, and reaches the object of chalk recycling.
Claims (3)
1. a chalk is saved and is accommodated device, it is characterized in that: comprise inner tube (1), outer tube (2) and push rod (3), the surface of described inner tube (1) is provided with external screw thread, the inner surface of described outer tube (2) is provided with the internal thread mating with external screw thread, the front end of described inner tube (1) is provided with some notches (4), the rear end of described inner tube (1) is provided with block (5), the front end of inner tube (1) is also provided with an outer gradient (6) near being also provided with and being positioned at notch (4), the front end of corresponding outer tube (2) is provided with the interior gradient (7) of mating with outer gradient, described push rod (3) is fixedly connected with the rear end of inner tube (1).
2. chalk according to claim 1 is saved and is accommodated device, it is characterized in that: the front end of described inner tube (1) is provided with three notches (4), and three notches (4) are uniformly distributed along inner tube (1) excircle.
3. chalk according to claim 1 is saved and is accommodated device, it is characterized in that: the front end of described outer tube (2) is provided with fixing collar (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310145945.8A CN104118245A (en) | 2013-04-25 | 2013-04-25 | Chalk saving clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310145945.8A CN104118245A (en) | 2013-04-25 | 2013-04-25 | Chalk saving clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104118245A true CN104118245A (en) | 2014-10-29 |
Family
ID=51763981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310145945.8A Pending CN104118245A (en) | 2013-04-25 | 2013-04-25 | Chalk saving clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104118245A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106427299A (en) * | 2016-09-12 | 2017-02-22 | 芜湖能盟信息技术有限公司 | Chalk clamping sleeve |
| CN107116930A (en) * | 2017-04-25 | 2017-09-01 | 怀化学院 | A kind of dust-proof propelling chalk sleeve |
-
2013
- 2013-04-25 CN CN201310145945.8A patent/CN104118245A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106427299A (en) * | 2016-09-12 | 2017-02-22 | 芜湖能盟信息技术有限公司 | Chalk clamping sleeve |
| CN107116930A (en) * | 2017-04-25 | 2017-09-01 | 怀化学院 | A kind of dust-proof propelling chalk sleeve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141029 |