CN204322810U - Convenient chalk - Google Patents
Convenient chalk Download PDFInfo
- Publication number
- CN204322810U CN204322810U CN201420647505.2U CN201420647505U CN204322810U CN 204322810 U CN204322810 U CN 204322810U CN 201420647505 U CN201420647505 U CN 201420647505U CN 204322810 U CN204322810 U CN 204322810U
- Authority
- CN
- China
- Prior art keywords
- chalk
- spacer
- convenient
- button
- outer tube
- 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
A kind of convenient chalk, comprise chalk and the chalk frame of chalk is installed, it is characterized in that: described chalk frame comprises urceolus and inner core, described inner core is close with chalk external diameter size, cavity is provided with between inner/outer tube, one button is contacted with the spacer be arranged on outer tube wall by cavity, and described spacer contacts with chalk, between described outer tube wall and spacer, be provided with spring.The utility model is by the improvement to existing structure, the improvement to chalk structure is reached by the parts of simple structure such as use spacer and spring etc., not only save the use amount of chalk, it also avoid fractureing of chalk in writing process, simultaneously because its structure is simple, easy to make, be also convenient to universal use.
Description
Technical field
The utility model belongs to a kind of realia---and the chalk write, relates to a kind of convenient chalk with supply chalk automatically concretely.
Background technology
Because teacher will write teaching notes on classroom, to impart knowledge to students, usually use chalk, because chalk has an impact at can descend slowly and lightly chalk dust and the hand of chalk dust to teacher of writing process, simultaneously because chalk belongs to fragile goods, easily fracture in writing process and be inconvenient to operate when its length shortens, short chalk is caused to be thrown away, be easy to the waste causing chalk, for this situation, therefore the propelling chalk of a lot of different structure is created, be convenient to teacher use, but the ubiquitous problem of these schemes is complicated structure, popularity rate is lower.In view of this, be necessary to improve for existing propelling chalk structure, make its structure more simple, easy to use.
Summary of the invention
For above problem, the utility model provides a kind of convenient chalk, also reaches the object of saving chalk consumption, have structure simple while convenient teaching uses, easy to use and low price.
A kind of convenient chalk, comprise chalk and the chalk frame of chalk is installed, it is characterized in that: described chalk frame comprises urceolus and inner core, described inner core is close with chalk external diameter size, cavity is provided with between inner/outer tube, one button is contacted with the spacer be arranged on outer tube wall by cavity, and described spacer contacts with chalk, between described outer tube wall and spacer, be provided with spring.
Further, described button is in " Π " type, and two catch bars on button are contacted with spacer by the hole arranged between inner core with urceolus top.This structure is simple, easy to make.
Further, described spacer one end and outer tube wall hinged, the other end contacts with chalk.By hinged, the loosening chalk that carries out being convenient to realize spacer advances automatically.
Further, it is curved that described spacer and chalk contact one end, matches with chalk.This structure makes spacer and chalk contact area increase, and is convenient to be fixed chalk.
Further, described spacer and button two catch bar contact site are provided with little groove, catch bar end and little groove fit.This structure mainly limits button when action, ensures that catch bar does not slide on spacer, ensures the flexibility ratio needing when sending at chalk.
Further, two catch bars on described button, slightly in " eight " font, coordinate with the outer wall in the hole between inner core and urceolus.This structure mainly ensures that resilient engagement is carried out in the hole on the catch bar of button and chalk frame, ensure button can not from chalk frame after landing.
beneficial effect
The utility model is by the improvement to existing structure, the improvement to chalk structure is reached by the parts of simple structure such as use spacer and spring etc., the use amount of not only having saved chalk also ensures that chalk is unlikely to fracture when writing simultaneously, because its structure is simple, easy to make, be also convenient to universal use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of convenient chalk, comprise chalk 4 and the chalk frame of chalk is installed, described chalk frame comprises urceolus 2 and inner core 3, described inner core 3 is close with chalk 4 external diameter size, chalk can slide in inner core 3, cavity is provided with between inner/outer tube, one button 1 is contacted with the spacer 5 be arranged on urceolus 2 wall by cavity, described spacer contacts with chalk, as can be seen from the figure, spacer coordinates with chalk is inclined, is provided with spring 6 between described outer tube wall and spacer.Spring 6 one end is fixed on pin that spacer is arranged; The other end is fixed on outer tube wall, the fixing mode that can adopt welding or pin; This structure passes through spring and spacer, in chalk use procedure, when chalk-writing end shortens, only need to click button 1, promoting button makes spacer expand, and then chalk glides, and extends its length, release button, under the action of the spring, spacer contacts with chalk, because spacer and chalk are in inclination contact, certain active force is produced to chalk, chalk can be stoped to retreat.
In the present embodiment, described button 1 is in " Π " type, and two catch bars 7 on button are contacted with spacer by the hole arranged between inner core with urceolus top.This structure is simple, easy to make.
In the present embodiment, described spacer one end and outer tube wall hinged, the other end contacts with chalk, outer tube wall arranges journal stirrup and to journal stirrup providing holes, providing holes on spacer is also connected by bearing pin, reach hinged object, by hinged, the loosening chalk that carries out being convenient to realize spacer advances automatically.
In the present embodiment, it is curved that described spacer and chalk contact one end, matches with chalk.Curved end size is suitable with chalk contact portion, and this structure makes spacer and chalk contact area increase, and is convenient to be fixed chalk.
In the present embodiment, described spacer and button two catch bar 7 contact site are provided with little groove (not drawing in figure), catch bar 7 end and little groove fit.This structure mainly limits button when action, ensures that catch bar does not slide at spacer, ensures the flexibility ratio when chalk needs to send to.
In the present embodiment, two catch bars 7 on described button, slightly in " eight " font, coordinate with the outer wall in the hole between inner core and urceolus.This structure mainly ensures that resilient engagement is carried out in the hole that the catch bar 7 of button and chalk frame are arranged, ensure button can not from chalk frame after landing.
Claims (6)
1. a convenient chalk, comprise chalk and the chalk frame of chalk is installed, it is characterized in that: described chalk frame comprises urceolus and inner core, described inner core is close with chalk external diameter size, cavity is provided with between inner/outer tube, one button is contacted with the spacer be arranged on outer tube wall by cavity, and described spacer contacts with chalk, between described outer tube wall and spacer, be provided with spring.
2. convenient chalk according to claim 1, is characterized in that: described button is in " Π " type, and two catch bars on button are contacted with spacer by the hole arranged between inner core with urceolus top.
3. convenient chalk according to claim 2, is characterized in that, described spacer one end and outer tube wall hinged, the other end contacts with chalk.
4. convenient chalk according to claim 3, is characterized in that: it is curved that described spacer and chalk contact one end, matches with chalk.
5. convenient chalk according to claim 2, is characterized in that: two catch bar contact sites on described spacer and button are provided with little groove, catch bar end and little groove fit.
6. convenient chalk according to claim 5, is characterized in that: two catch bars on described button, slightly in " eight " font, coordinate with the outer wall in the hole between inner core and urceolus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420647505.2U CN204322810U (en) | 2014-11-03 | 2014-11-03 | Convenient chalk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420647505.2U CN204322810U (en) | 2014-11-03 | 2014-11-03 | Convenient chalk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204322810U true CN204322810U (en) | 2015-05-13 |
Family
ID=53159203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420647505.2U Expired - Fee Related CN204322810U (en) | 2014-11-03 | 2014-11-03 | Convenient chalk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204322810U (en) |
-
2014
- 2014-11-03 CN CN201420647505.2U patent/CN204322810U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20151103 |
|
| EXPY | Termination of patent right or utility model |