CN201573405U - Chalk sleeve - Google Patents
Chalk sleeve Download PDFInfo
- Publication number
- CN201573405U CN201573405U CN2009202542470U CN200920254247U CN201573405U CN 201573405 U CN201573405 U CN 201573405U CN 2009202542470 U CN2009202542470 U CN 2009202542470U CN 200920254247 U CN200920254247 U CN 200920254247U CN 201573405 U CN201573405 U CN 201573405U
- Authority
- CN
- China
- Prior art keywords
- chalk
- sleeve
- outer sleeve
- rotating ring
- bulge loop
- 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 provides a chalk sleeve which comprises an outer sleeve, a screw stud and a rotary ring. The screw stud which can freely move is sheathed in the outer sleeve, the middle part of the outer sleeve is a convex ring, one end of the convex ring is open, the rotary ring is arranged in the convex ring, and the outer diameter of the rotary ring is smaller than the inner diameter of the convex ring; an external thread of the screw stud is matched with an internal thread of the rotary ring, round grooves are arranged at the two ends of the screw stud, and chalks are inserted in the round grooves. The chalks in different colors can be inserted into the chalk sleeve; when the chalk sleeve is held for writing, direct contact between the hand and the chalk can be avoided, thereby preventing chalk dust from being directly adhered on the hand. Meanwhile, as the exposed part of the chalk is short, the chalk cannot be easily broken off and a chalk end can be fully used, thereby reducing wastes.
Description
Technical field
The utility model relates to a kind of blackboard and writes and use chalk sleeve.
Background technology
The teacher needed writing on the blackboard at last class hour, the supporting ways of writing of chalk and blackboard is easy to use because of it, intuitively eye-catching, characteristics such as available obtain more application everywhere.Common chalk is many to be that primary raw material is made with white lime and calcium sulfate, and frangibility, dust are many; When writing, hand directly contacts with chalk, and chalk dust sticks on hand easily, has a class at every turn and all need wash one's hands.
In the field research process, the teacher usually needs to use the key content of different colours chalk mark teaching, normally put down chalk on hand, the chalk that takes out another kind of color marks, the process of seeking chalk often causes the classroom short interruption, waste time, attention of student is disperseed, the continuity of influence teaching.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the defective of above-mentioned prior art and a kind of environmental protection, chalk sleeve easy to use are provided.
The alleged problem of the utility model is solved by following technical scheme:
A kind of chalk sleeve, be provided with outer sleeve in the formation, be socketed in the double-screw bolt and the rotating ring that can move freely in the outer sleeve, described outer sleeve mid portion is a bulge loop, bulge loop one end opening, rotating ring is positioned at bulge loop, and the external diameter of rotating ring is less than the bulge loop internal diameter, wherein, the external screw thread of double-screw bolt and the screw-internal thread fit of rotating ring, described double-screw bolt two ends are provided with circular groove, and chalk inserts in the circular groove.
Above-mentioned chalk sleeve, described outer sleeve two-port is provided with elastic washer, and described elastic washer external diameter cooperates fixing with the outer sleeve internal diameter, and elastic washer internal diameter and chalk external diameter are adaptive.
The chalk of difference plug-in mounting different colours in the above-mentioned chalk sleeve, the circular groove at described double-screw bolt tube two ends.
The utility model double-screw bolt two ends chalk of all can pegging graft, in the practical application, the chalk of the different colours of can pegging graft is convenient to make marks.Hold chalk sleeve and write, avoid staff directly to contact with chalk, chalk dust can directly not sticked on the staff, the part that the while chalk exposes is very short, when the part of expenditure uses up, rotate double-screw bolt again, chalk is stretched out, not only frangibility not also can make full use of the chalk head, thereby reduce waste.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The label of each parts is expressed as follows among the figure: 1. outer sleeve; 2. double-screw bolt; 3. rotating ring; 4. circular groove; 5. elastic washer; 6. chalk; 7. bulge loop.
The specific embodiment
Referring to Fig. 1, the utility model is provided with outer sleeve 1 in constituting, is socketed in the double-screw bolt 2 and the rotating ring 3 that can move freely in the outer sleeve, described outer sleeve mid portion is bulge loop 7 (outer sleeve that is used for fixing both sides), bulge loop one end opening, rotating ring is put into bulge loop by opening, and the external diameter of described rotating ring is less than the bulge loop internal diameter, and the internal thread of rotating ring cooperates with the external screw thread of double-screw bolt, described double-screw bolt two ends are provided with circular groove 4, and chalk 6 inserts in the circular groove.The chalk of difference plug-in mounting different colours in the circular groove at described double-screw bolt tube two ends.Described outer sleeve two-port is provided with elastic washer 5, and described elastic washer external diameter cooperates fixing with the outer sleeve internal diameter, and elastic washer internal diameter and chalk external diameter are adaptive.
In the practical application; in the circular groove at double-screw bolt tube two ends the different colours chalk is set respectively, can be directly when need using any chalk and of the chalk back-out of rotation rotating ring with a termination, the other end follows up thereupon; because it is shorter to screw out part; in conjunction with the protective effect of elastic washer, chalk is frangibility not, makes full use of the chalk head; thereby reduced the waste of chalk; and hold chalk sleeve and write, avoid staff directly to contact with chalk, chalk dust can directly not sticked on the staff.
Claims (2)
1. chalk sleeve, it is characterized in that, it comprises outer sleeve (1), is socketed in the double-screw bolt (2) and the rotating ring (3) that can move freely in the outer sleeve, and described outer sleeve mid portion is bulge loop (7), bulge loop one end opening, rotating ring is positioned at bulge loop, the external diameter of rotating ring is less than the bulge loop internal diameter, wherein, and the external screw thread of double-screw bolt and the screw-internal thread fit of rotating ring, described double-screw bolt two ends are provided with circular groove (4), and chalk (6) inserts in the circular groove.
2. according to claims 1 described chalk sleeve, it is characterized in that: described outer sleeve two-port is provided with elastic washer (5), and described elastic washer external diameter cooperates fixing with the outer sleeve internal diameter, and elastic washer internal diameter and chalk external diameter are adaptive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202542470U CN201573405U (en) | 2009-10-30 | 2009-10-30 | Chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202542470U CN201573405U (en) | 2009-10-30 | 2009-10-30 | Chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201573405U true CN201573405U (en) | 2010-09-08 |
Family
ID=42693287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202542470U Expired - Fee Related CN201573405U (en) | 2009-10-30 | 2009-10-30 | Chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201573405U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108116102A (en) * | 2017-12-22 | 2018-06-05 | 温州习得教育科技有限公司 | A kind of chalk sleeve for being convenient for making full use of chalk |
| CN108638697A (en) * | 2018-06-27 | 2018-10-12 | 俞妍冰 | A kind of chalk sleeve |
-
2009
- 2009-10-30 CN CN2009202542470U patent/CN201573405U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108116102A (en) * | 2017-12-22 | 2018-06-05 | 温州习得教育科技有限公司 | A kind of chalk sleeve for being convenient for making full use of chalk |
| CN108638697A (en) * | 2018-06-27 | 2018-10-12 | 俞妍冰 | A kind of chalk sleeve |
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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: 20100908 Termination date: 20111030 |