CN203063364U - Breaking prevention type chalk sleeve - Google Patents
Breaking prevention type chalk sleeve Download PDFInfo
- Publication number
- CN203063364U CN203063364U CN 201320080018 CN201320080018U CN203063364U CN 203063364 U CN203063364 U CN 203063364U CN 201320080018 CN201320080018 CN 201320080018 CN 201320080018 U CN201320080018 U CN 201320080018U CN 203063364 U CN203063364 U CN 203063364U
- Authority
- CN
- China
- Prior art keywords
- chalk
- sleeve
- pen holder
- pen container
- clamping sleeve
- 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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- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
Abstract
The utility model discloses a breaking prevention type chalk sleeve which comprises a pen holder with the inner diameter larger than maximum outer diameter of a chalk, wherein at least two clamp jaws are arranged at the bottom end of the pen holder; a pressing piece pressing on the chalk tightly is hinged on the inner side of each clamp jaw; and a compress sleeve for retracting the clamp jaws is mounted on the pen holder. During usage, the compress sleeve is taken out, and the chalk is put from the top end of the pen holder, so that the thin end of the chalk extends out of the middle part of the pressing pieces below the pen holder; after the extending length of the chalk is adjusted, the compress sleeve is mounted on the pen holder from the bottom end of the pen holder; when the chalk is shortened, the compress sleeve is taken down, the extending length of the chalk is adjusted, and the compress sleeve is mounted again; the steps are repeated until the chalk is used up; and with the adoption of the design of the clamp jaws and the pressing pieces, the problem that the thickness of the chalk is inconsistent and difficult to adjust is solved, the pressing pieces and the chalk adopt surface contact, and the chalk is prevented from being pinched off.
Description
Technical field
The utility model relates to a kind of educational aid, relates in particular to a kind of chalk sleeve.
Background technology
Chalk is in use made teacher's hand dirty easily, and is unhygienic, and new chalk is long, if firmly excessive during use, easily chalk fractureed; Chalk shortens gradually, and inconvenience is used in also bad gripping.Because chalk is upper coarse and lower fine cone, so all there are a lot of technical barriers in existing chalk sleeve, the chalk sleeve that adopts jaw is arranged, its shortcoming is that the clamping part of jaw is the some contact, chalk fractures easily in the use, and behind the chalk usefulness weak point, the easy deflection activity of chalk can't be used chalk freely.
The utility model content
Technical problem to be solved in the utility model provides a kind of adjustable length and anti-breaking formula chalk sleeve easy to use.
For solving the problems of the technologies described above, the technical solution of the utility model is: anti-breaking formula chalk sleeve, comprise that internal diameter is greater than the pen container of chalk maximum outside diameter, the bottom of described pen container is provided with at least two jaws, the inboard of each described jaw all is hinged with the compressing tablet that is pressed on the chalk, and the clamping sleeve that described jaw is drawn in is installed on the described pen container.
As a kind of optimized technical scheme, described compressing tablet arranges along the chalk length direction.
As a kind of optimized technical scheme, described compressing tablet has the taper cambered surface corresponding with chalk.
As a kind of optimized technical scheme, described clamping sleeve is threaded with described pen container, and the bottom of described clamping sleeve is provided with the choke that compresses described jaw.
As a kind of optimized technical scheme, the outer peripheral face of described clamping sleeve is provided with anti-skidding line.
Owing to adopted technique scheme, anti-breaking formula chalk sleeve, comprise that internal diameter is greater than the pen container of chalk maximum outside diameter, the bottom of described pen container is provided with at least two jaws, the inboard of each described jaw all is hinged with the compressing tablet that is pressed on the chalk, is equipped with on the described pen container described compressing tablet is pressed on clamping sleeve on the chalk; During use, clamping sleeve is taken off, chalk is put into from the top of pen container, the thin end of chalk is stretched out in the middle of the compressing tablet of pen container below, after adjusting the length that chalk stretches out, the bottom of clamping sleeve from pen container is installed on the pen container, after chalk shortens, takes off clamping sleeve, adjust the length that chalk stretches out, again clamping sleeve is installed, so repeatedly, used up up to chalk; Jaw and compressing tablet design have not only solved the inconsistent problem that is difficult to adjust of chalk thickness, and compressing tablet is that face contacts with chalk, can prevent the chalk pinch off.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the cutaway view of the utility model embodiment;
Among the figure: the 1-pen container; The 2-jaw; The 3-compressing tablet; The 4-clamping sleeve; The anti-skidding line of 41-; The 42-choke.
The specific embodiment
Below in conjunction with drawings and Examples, further set forth the utility model.In the following detailed description, only by the mode of explanation some one exemplary embodiment of the present utility model has been described.Undoubtedly, those of ordinary skill in the art can recognize, under the situation that does not depart from spirit and scope of the present utility model, can revise described embodiment with various mode.Therefore, accompanying drawing is illustrative with being described in essence, rather than is used for the protection domain of restriction claim.
As depicted in figs. 1 and 2, anti-breaking formula chalk sleeve, comprise that internal diameter is greater than the pen container 1 of chalk maximum outside diameter, the bottom of described pen container 1 is provided with at least two jaws 2, in the present embodiment, is provided with three jaws 2, the outer peripheral face of three jaws 2 forms discontinuous conically shaped, the inboard of each described jaw 2 all is hinged with the compressing tablet 3 that is pressed on the chalk, and described compressing tablet 3 arranges along the chalk length direction, and described compressing tablet 3 has the taper cambered surface corresponding with chalk.The clamping sleeve 4 that described jaw 2 is drawn in is installed on the described pen container 1, and the outer peripheral face of described clamping sleeve 4 is provided with anti-skidding line 41, and described clamping sleeve 4 is threaded with described pen container 1, and the bottom of described clamping sleeve 4 is provided with the choke 42 that compresses described jaw 2.
During use, clamping sleeve 4 is taken off, chalk is put into from the top of pen container 1, chalk relies on the gravity of self to move down, the thin end of chalk is stretched out in the middle of the compressing tablet 3 of pen container 1 below, certainly, also can prevent chalk from an end that is provided with compressing tablet 3, concrete operation method is decided on user's custom, adjust the length that chalk stretches out after, the bottom of clamping sleeve 4 from pen container 1 is installed on the pen container 1, namely from an end that is provided with compressing tablet 3 clamping sleeve 4 is sleeved on the pen container 1, screw clamping sleeve 4 then, utilize the choke 42 extruding jaws 2 of clamping sleeve 4, because the outer peripheral face of jaw 2 is inclined-planes, so along with tightening of clamping sleeve 4, the extruding force of 42 pairs of jaws 2 of choke is more big, and jaw 2 extruding compressing tablets 3 are pressed on the chalk compressing tablet 3; After chalk shortens, take off clamping sleeve 4, adjust the length that chalk stretches out, again clamping sleeve 4 is installed, so repeatedly, use up up to chalk; Jaw 2 and compressing tablet 3 designs have not only solved the inconsistent problem that is difficult to adjust the chalk extension elongation of chalk thickness, and compressing tablet 3 is that face contacts with chalk, can prevent that in use chalk is by pinch off.Use chalk sleeve described in the utility model to reduce and be applied to user's chalk bits on hand, clean hygiene more.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. anti-breaking formula chalk sleeve, it is characterized in that: comprise that internal diameter is greater than the pen container of chalk maximum outside diameter, the bottom of described pen container is provided with at least two jaws, and the inboard of each described jaw all is hinged with the compressing tablet that is pressed on the chalk, and the clamping sleeve that described jaw is drawn in is installed on the described pen container.
2. anti-breaking formula chalk sleeve as claimed in claim 1, it is characterized in that: described compressing tablet arranges along the chalk length direction.
3. anti-breaking formula chalk sleeve as claimed in claim 2, it is characterized in that: described compressing tablet has the taper cambered surface corresponding with chalk.
4. anti-breaking formula chalk sleeve as claimed in claim 1, it is characterized in that: described clamping sleeve is threaded with described pen container, and the bottom of described clamping sleeve is provided with the choke that compresses described jaw.
5. as the described anti-breaking formula chalk sleeve of the arbitrary claim of claim 1 to 4, it is characterized in that: the outer peripheral face of described clamping sleeve is provided with anti-skidding line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320080018 CN203063364U (en) | 2013-02-01 | 2013-02-01 | Breaking prevention type chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320080018 CN203063364U (en) | 2013-02-01 | 2013-02-01 | Breaking prevention type chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203063364U true CN203063364U (en) | 2013-07-17 |
Family
ID=48762184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320080018 Expired - Fee Related CN203063364U (en) | 2013-02-01 | 2013-02-01 | Breaking prevention type chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203063364U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538953A (en) * | 2016-03-10 | 2016-05-04 | 济南高达信息技术有限公司 | Environment-friendly chalk |
| CN105599492A (en) * | 2016-02-19 | 2016-05-25 | 刘乐凝 | Chalk shell |
-
2013
- 2013-02-01 CN CN 201320080018 patent/CN203063364U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105599492A (en) * | 2016-02-19 | 2016-05-25 | 刘乐凝 | Chalk shell |
| CN105538953A (en) * | 2016-03-10 | 2016-05-04 | 济南高达信息技术有限公司 | Environment-friendly chalk |
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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: 20130717 Termination date: 20140201 |