CN202156155U - Telescopic chalk barrel - Google Patents
Telescopic chalk barrel Download PDFInfo
- Publication number
- CN202156155U CN202156155U CN2011202664174U CN201120266417U CN202156155U CN 202156155 U CN202156155 U CN 202156155U CN 2011202664174 U CN2011202664174 U CN 2011202664174U CN 201120266417 U CN201120266417 U CN 201120266417U CN 202156155 U CN202156155 U CN 202156155U
- Authority
- CN
- China
- Prior art keywords
- chalk
- telescopic
- tube
- barrel
- hands
- 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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- Pens And Brushes (AREA)
Abstract
The utility model relates to a chalk barrel which can avoid direct contact of hands and chalk, reduce harm to the hands and save the use amount of the chalk. The telescopic chalk barrel comprises a chalk barrel and a sleeve arranged outside the chalk barrel and matched with the chalk barrel, and has the advantages that harm to the hands of a teacher can be reduced, chalk dust can be prevented from polluting the hands or the finger nails, thus being more sanitary; the telescopic design is humanized, the length of the chalk can be adjusted according to need in use, and waste can be reduced as the chalk is uneasy to break; and the structure is simple, the operation is simple, the cost is very low, and the telescopic chalk barrel is convenient to popularize and use.
Description
Technical field
The utility model relates to a kind of hand of can avoiding and directly contacts with chalk, reduces adversary's injury, and the telescopic chalk tube of the chalk consumption of having saved, and belongs to realia and makes the field.
Background technology
At present, school adopts chalk to help teaching, yet chalk has certain corrosivity; Teacher use adversary year in year out more or less has some injuries, and is simultaneously on hand, can be stained with chalk dust in the nail, very unhygienic; The material of chalk own is also very fragile, and long fractures easily, can bring influence to teaching; Short be inconvenient to again write, caused waste.
The utility model content
Purpose of design: avoid the weak point in the above-mentioned background technology, design a kind of hand of can avoiding and directly contact, reduce adversary's injury with chalk, and the telescopic chalk tube of the chalk consumption of having saved.
Design: in order to realize above-mentioned purpose of design.The chalk tube is equipped with the design of the sleeve that matches with the chalk tube outward, is the major technique characteristic of the utility model.The purpose of doing like this is: the chalk tube is cylindrical, and the external diameter of size and chalk matches, and can chalk be stuck in the chalk tube sleeve ovalize; The short radius of inboard profile is consistent with the external diameter of chalk tube, and the chalk tube can arbitrarily be stretched in sleeve, the length of regulating chalk, and it is long and fracture easily to have solved chalk; Resolute problem of being inconvenient to write, respectively there is a row kick at corresponding two, chalk tube surface, and corresponding two, sleeve short radius place respectively has groove one, when regulating chalk sleeve; Forward bossed two only the major radius place of sleeve to, avoid flexible the generation disturbed, when reaching suitable length, rotate chalk sleeve; Projection is snapped in the groove in the sleeve, and because of projection is the flexible plastic material, it is bigger to rub; After blocking, the fixed-site that elastic force that the protrusion-shaped sell of one's property is given birth to and frictional force can guarantee chalk sleeve is when teaching; Use the application can reduce the injury to teacher's hand, much cleaner, chalk is not easy to fracture and reduced waste simultaneously.
Technical scheme: a kind of telescopic chalk tube, it comprises the chalk tube, said chalk tube is equipped with the sleeve that matches with the chalk tube outward.
The utility model is compared with background technology, and the one, can reduce injury to teacher's hand, also make chalk dust be not easy to be stained with to hand or in the nail, much cleaner; The 2nd, very hommization of telescopic design, the length of regulating chalk during use as required, chalk is not easy to fracture and reduced waste; The 3rd, structure is simple, and is simple to operate, and cost is very low, conveniently promotes the use of.
Description of drawings
Fig. 1 is the structural representation of telescopic chalk tube.
The specific embodiment
Embodiment 1: with reference to accompanying drawing 1.A kind of telescopic chalk tube, it comprises chalk tube 1, the said chalk tube 1 outer sleeve 2 that matches with chalk tube 1 that is equipped with; Chalk tube 1 is cylindrical, and the external diameter of size and chalk matches, and respectively there is a row kick 3 at corresponding two, surface; Projection 3 is the flexible plastic material, sleeve 2 ovalizes, and the short radius of inboard profile is consistent with the external diameter of chalk tube 1; Corresponding two, short radius place respectively has groove 4 one, and projection 3 can snap in the groove 4, with fixing chalk tube 1; Its manufacture craft is a prior art, is not described herein at this.
What need understand is: though the foregoing description is to the mentality of designing of the utility model detailed text description of contrasting; But these text descriptions; Just the simple text of the utility model mentality of designing is described; Rather than to the restriction of the utility model mentality of designing, any combination, increase or modification that does not exceed the utility model mentality of designing all falls in the protection domain of the utility model.
Claims (3)
1. telescopic chalk tube, it comprises the chalk tube, it is characterized in that: said chalk tube is equipped with the sleeve that matches with the chalk tube outward.
2. a kind of telescopic chalk tube according to claim 1, it is characterized in that: said chalk tube is cylindrical, and the external diameter of size and chalk matches, and respectively there is a row kick at corresponding two, surface, and projection is the flexible plastic material.
3. a kind of telescopic chalk tube according to claim 1 is characterized in that: said sleeve ovalize, and the short radius of inboard profile is consistent with the external diameter of chalk tube, and corresponding two, short radius place respectively has groove one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202664174U CN202156155U (en) | 2011-07-26 | 2011-07-26 | Telescopic chalk barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202664174U CN202156155U (en) | 2011-07-26 | 2011-07-26 | Telescopic chalk barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202156155U true CN202156155U (en) | 2012-03-07 |
Family
ID=45763800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202664174U Expired - Fee Related CN202156155U (en) | 2011-07-26 | 2011-07-26 | Telescopic chalk barrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202156155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196741A (en) * | 2015-10-02 | 2015-12-30 | 刘乐凝 | Chalk with protecting bushes |
-
2011
- 2011-07-26 CN CN2011202664174U patent/CN202156155U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196741A (en) * | 2015-10-02 | 2015-12-30 | 刘乐凝 | Chalk with protecting bushes |
| CN105196741B (en) * | 2015-10-02 | 2016-11-16 | 刘乐凝 | A kind of chalk of band sheath |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20120726 |