CN202702970U - Telescopic chalk sleeve - Google Patents
Telescopic chalk sleeve Download PDFInfo
- Publication number
- CN202702970U CN202702970U CN 201220332795 CN201220332795U CN202702970U CN 202702970 U CN202702970 U CN 202702970U CN 201220332795 CN201220332795 CN 201220332795 CN 201220332795 U CN201220332795 U CN 201220332795U CN 202702970 U CN202702970 U CN 202702970U
- Authority
- CN
- China
- Prior art keywords
- chalk
- telescopic
- knob
- telescopic cylinder
- retracting cylinder
- 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 telescopic chalk sleeve. The telescopic chalk sleeve comprises a plastic sleeve head, a chalk, an outer plastic pipe, a knob, a threaded straight rod, a telescopic cylinder and a chalk cap, wherein the knob is fixedly connected with the threaded straight rod, the threaded straight rod can rotate in a bottom hole of the telescopic cylinder and further drive the telescopic cylinder to perform parallel movement, the upper end of the telescopic cylinder is in contact with the chalk, and the plastic sleeve head is sheathed on the chalk. As the plastic sleeve head formed with three contact claws of the telescopic chalk sleeve is sheathed on the chalk, the contact claws at the front end can clamp the chalk, and the size can be adjusted and be well suitable for the thickness of the chalk; a writer can prevent the hand from being in direct contact with the chalk, when the chalk is not long enough, only the knob needs to be rotated for pushing out the chalk till the chalk is very short and can not be used, then the plastic sleeve head can be removed and the remaining chalk can be pushed out; and when the chalk is not used, the chalk cap can be covered for facilitating the carrying.
Description
One, technical field
The utility model relates to a kind of teaching aid, especially a kind of Telescopic chalk holder.
Two, background technology
Existing shape classroom teaching general directly catches chalk to write with hand, can make dirty like this hand, book or lecture notes, and the raw material in the chalk also can have spread effect to skin in addition, pastel especially, also easy cleaning not; And usually also have very long one section to abandon because being inconvenient to use, cause waste.Be exactly the inconvenience of carrying of chalk in addition.
Three, summary of the invention
The purpose of this utility model is to overcome above-mentioned shortcoming, dexterously extension sleeve and hold-down screw is combined, and free Telescopic chalk easily brings cleaning, new teaching apparatus easily to the user.
The technical scheme that the utility model is taked is:
It is pullover by plastics, chalk, outer plastic tube, knob, screw thread straight-bar, retracting cylinder and the cap for brush consist of, described knob is fixedly connected with the screw thread straight-bar, the screw thread straight-bar rotates in the bottom outlet of retracting cylinder, drive the retracting cylinder parallel, the retracting cylinder upper end contacts with chalk, and plastics are pullover to be nested with chalk.
Because the utility model has the plastic sheath headgear of three engaging nails and lives chalk, the engaging nail of its front end can clamp chalk, and is changeable, can be fit to well the thickness of chalk.The writer catches pullover writing with hand, avoid hand directly to contact chalk, when chalk falls short of, as long as clockwise rotate the knob of outer plastic tube tube bottom, promote retracting cylinder by the screw thread straight-bar, thus chalk is extrapolated, until chalk is extremely short after can not using, take off plastics pullover, release residual chalk and get final product.Not the time spent, cover the cap for brush, be easy to carry.
Four, description of drawings
Concrete structure of the present utility model is provided by the following drawings.
Fig. 1 is structural representation of the present utility model.
Sign in the accompanying drawing represents respectively:
1. pullover 2. chalks of plastics 3. outer plastic tube 4. knobs
5. screw thread straight-bar 6. retracting cylinders 7. caps for brush
Five, the specific embodiment
As can be seen from Figure 1, it is pullover 1 by plastics, chalk 2, outer plastic tube 3, knob 4, screw thread straight-bar 5, retracting cylinder 6 and the cap for brush 7 consist of, described knob 4 is fixedly connected with screw thread straight-bar 5, screw thread straight-bar 5 rotates in the bottom outlet of retracting cylinder 6, drive retracting cylinder 6 parallels, retracting cylinder 6 upper ends contact with chalk 2, and plastics pullover 1 are being nested with chalk 2.
During manufacturing, the pullover 1 length 25mm of plastics, 120 ° of distributions of three engaging nails of front end, port diameter 6mm, pipe end diameter 15mm can overlap it outside on the plastic tube 3.Outer plastic tube 3 length 80mm, external diameter 15mm has two raised lines on the inner tubal wall, 180 ° of distributions, knob 4 is equipped with in the bottom, is fixed with the long screw thread straight-bar 5 of 40mm on the knob 4.Be placed with a retracting cylinder 6 that can move along raised line in the pipe, retracting cylinder 6 outer walls have two corresponding grooves, length 40mm, and external diameter 13mm, above except plastics pullover 1, all the other preparation method materials and lip gloss bottle similar.
Claims (1)
1. Telescopic chalk sleeve, it is characterized in that it is made of plastics pullover [1], chalk [2], outer plastic tube [3], knob [4], screw thread straight-bar [5], retracting cylinder [6] and the cap for brush [7], described knob [4] is fixedly connected with screw thread straight-bar [5], screw thread straight-bar [5] rotates in the bottom outlet of retracting cylinder [6], drive retracting cylinder [6] parallel, retracting cylinder [6] upper end contacts with chalk [2], and plastics pullover [1] are being nested with chalk [2].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332795 CN202702970U (en) | 2012-07-10 | 2012-07-10 | Telescopic chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332795 CN202702970U (en) | 2012-07-10 | 2012-07-10 | Telescopic chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202702970U true CN202702970U (en) | 2013-01-30 |
Family
ID=47583304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220332795 Expired - Fee Related CN202702970U (en) | 2012-07-10 | 2012-07-10 | Telescopic chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202702970U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001241A (en) * | 2019-04-23 | 2019-07-12 | 长沙宁湖机械设备有限公司 | A kind of multi-function chalk casing |
-
2012
- 2012-07-10 CN CN 201220332795 patent/CN202702970U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001241A (en) * | 2019-04-23 | 2019-07-12 | 长沙宁湖机械设备有限公司 | A kind of multi-function chalk casing |
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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: 20130130 Termination date: 20130710 |