CN204451634U - A kind of simple and easy chalk end fixture - Google Patents
A kind of simple and easy chalk end fixture Download PDFInfo
- Publication number
- CN204451634U CN204451634U CN201420813925.3U CN201420813925U CN204451634U CN 204451634 U CN204451634 U CN 204451634U CN 201420813925 U CN201420813925 U CN 201420813925U CN 204451634 U CN204451634 U CN 204451634U
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- China
- Prior art keywords
- cylinder
- face
- chalk
- easy
- internal diameter
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of teaching aid, be specifically related to a kind of simple and easy chalk end fixture that can fully recycle for chalk end, comprise chuck body, described chuck body entirety is a hollow structure, the equal opening in front-end and back-end of described chuck body, the internal diameter of described front opening is less than the internal diameter of open rearward end, the internal diameter of described front opening is suitable with the diameter of chalk, the internal diameter of described open rearward end is suitable with human body forefinger diameter, the utility model structure is simple, easy to operate, there is good promotional value.Entirety is a hollow structure, and chalk end is installed in one end, and the other end is sleeved on finger, if the hyperbrachycephalic words of chalk, so can adjust boosting bar, the size of the end of installing chalk end is diminished, so just can install shorter chalk end, easy to use.
Description
Technical field
The utility model relates to a kind of teaching aid, is specifically related to a kind of simple and easy chalk end fixture that can fully recycle for chalk end.
Background technology
At present, in concrete teaching practice, the main expression still being realized teacher's meaning by the word that writes with chalk on blackboard, but due to the restriction of staff, for the chalk end that size is shorter, then have no idea to have re-used, mainly once the shorter words of chalk end, so staff will be inconvenient by chalk end, do not use strength, thus cause very large waste.Sometimes a class gets off, and likely all can have one deck chalk end on the ground, cause very large waste.
Summary of the invention
The purpose of this utility model is overcome deficiency of the prior art and provide a kind of simple and easy chalk end fixture, and this fixture can realize use again for shorter chalk end, and this clamp structure is simple, only needs to be sleeved on finger both can operate.
The purpose of this utility model is achieved in that
A kind of simple and easy chalk end fixture, comprise chuck body, described chuck body entirety is a hollow structure, the equal opening in front-end and back-end of described chuck body, the internal diameter of described front opening is less than the internal diameter of open rearward end, the internal diameter of described front opening is suitable with the diameter of chalk, and the internal diameter of described open rearward end is suitable with human body forefinger diameter.
Based on the above, the outline of described front opening is a taper surface one, inner surface is the combination of a face of cylinder one and taper surface two, a boosting bar is fitted with in described columniform front opening, described open rearward end outline is a cylinder, inner surface is a face of cylinder two, and the described face of cylinder two is docked with taper surface two.
Based on the above, described boosting bar outline is the structure be butted into by the face of cylinder three, taper surface three and the face of cylinder four, the described face of cylinder three is suitable with the face of cylinder one, and described taper surface three is suitable with taper surface two, and the described face of cylinder four is suitable with the face of cylinder two.
Based on the above, the tail end of described boosting bar is fixedly installed a rubber blanket.
Based on the above, the outer surface of described open rearward end is provided with a recess pressed in order to thumb.
Based on the above, the breech face of described boosting bar is provided with the jack of a T-shaped structure, corresponding rubber blanket is provided with the plug of a T-shaped structure.
Based on the above, the external diameter of described rubber blanket is identical with the external diameter of boosting bar.
The utility model has following advantage:
The utility model structure is simple, easy to operate, has good promotional value.Entirety is a hollow structure, and chalk end is installed in one end, and the other end is sleeved on finger, if the hyperbrachycephalic words of chalk, so can adjust boosting bar, the size of the end of installing chalk end is diminished, so just can install shorter chalk end, easy to use.
Accompanying drawing explanation
Fig. 1 is the structural representation that boosting bar is pushed to completely.
Fig. 2 is the structural representation that boosting bar is not pushed to.
Fig. 3 is the structural representation that half pushed to by boosting bar.
Fig. 4 is the syndeton schematic diagram of boosting bar and rubber blanket.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model will be further described.
As shown in Figure 1,2,3, 4, a kind of simple and easy chalk end fixture, comprise chuck body 1, described chuck body 1 entirety is a hollow structure, the equal opening in front-end and back-end of described chuck body 1, the internal diameter of described front opening 2 is less than the internal diameter of open rearward end 3, and the internal diameter of described front opening 2 is suitable with the diameter of chalk, and the internal diameter of described open rearward end 3 is suitable with human body forefinger diameter.When using, be directly sleeved on index by open rearward end 3, be set with in place, just at front opening 2 position, chalk end can be installed, chalk end be inserted into front opening position, expose outside certain size, be convenient to write.
Overall structure mainly relies on the strength of the forefinger of people to carry out support fixture, thus extend the tail dimension of chalk, so just can write on blackboard very easily, because chalk end is shorter, if therefore front opening 2 is arranged to vertical cross-section, so chalk end is just not easy to write on blackboard, inconvenient operation.Given this, the outline of front opening 2 is a taper surface 1, so just facilitates chalk to operate on blackboard, and is unlikely to write word on black because chalk end is shorter.
Front opening 2 inner surface is the combination of a face of cylinder 1 and taper surface 25, because the internal diameter of front opening 2 is less than the internal diameter of open rearward end 3, therefore, in concrete process, the inner surface of front opening 2 can only be made the combination of the face of cylinder and taper surface, such design is more reasonable, and the structure on the face of cylinder is also convenient to the smaller chalk end of installation dimension, makes chalk end entirety have a support.
A boosting bar 6 is fitted with in described columniform front opening 2, the effect of boosting bar 6 mainly increases and reduces the size in space on the face of cylinder 1, the convenient chalk end installing different size size, if the length on the face of cylinder 1 needed is long, so just can with chalk top once boosting bar 6 just can increase the space on the face of cylinder 1, if need smaller space, so just to be pushed up boosting bar 6 by finger, the size in the space of arc surface 4 just can be reduced.In concrete operation, forefinger immediate roof is to boosting bar 6, and finger tip can compare pain, therefore, the tail end of described boosting bar 6 is fixedly installed a rubber blanket 12, and such finger tip will act on boosting bar 6 by rubber blanket 12, reduce the pain of finger tip, on the contrary can be very comfortable.In addition, rubber blanket 12 and the installation of boosting bar 6, adopt following mode: the breech face of described boosting bar 6 is provided with the jack 61 of a T-shaped structure, corresponding rubber blanket 12 be provided with the plug 62 of a T-shaped structure.Rubber blanket 12 and boosting bar 6 can more firmly combine by the jack 61 of T-shaped structure and the setting of plug 62, add firm performance.
Described open rearward end 3 outline is a cylinder, and inner surface is a face of cylinder 28, and the described face of cylinder 28 is docked with taper surface 25.The structure on the face of cylinder 28 can be good at being formed with finger being set with, and can not feel under the weather.The face of cylinder 28 is docked with taper surface 25, mainly considers the structure of boosting bar,
Boosting bar 6 outline is the structure be butted into by the face of cylinder 39, taper surface 3 10 and the face of cylinder 4 11, the described face of cylinder 39 is suitable with the face of cylinder 1, described taper surface 3 10 is suitable with taper surface 25, the described face of cylinder 4 11 is suitable with the face of cylinder 28, the outline of such boosting bar can be good at being formed with the inner surface of fixture coordinating closely, especially on the face of cylinder 1, taper surface 25 and the face of cylinder 28 position of docking, can be more smooth and easy.
Based on the above, based on the above, the outer surface of described open rearward end 3 is provided with a recess 13 pressed in order to thumb.The setting of this recess 13 is an auxiliary effect to a certain extent, such as, when this clamp chalk of use, the strength of forefinger is sometimes limited after all, thumb is at this time just needed to assist, at this time thumb by being pressed on recess 13, can prevent horizontally slipping and firmly uneven situation of thumb
Based on the above, the external diameter of described rubber blanket is identical with the external diameter of boosting bar 6.Boosting bar 6 and rubber blanket is made to seem to become as a whole, when moving up and down, can be more smooth and easy.If size arranges skimble-scamble words, so upper and lower motion will have some setbacks very much.
Claims (7)
1. a simple and easy chalk end fixture, it is characterized in that: comprise chuck body (1), described chuck body (1) entirety is a hollow structure, the equal opening in front-end and back-end of described chuck body (1), the internal diameter of described front opening (2) is less than the internal diameter of open rearward end (3), the internal diameter of described front opening (2) is suitable with the diameter of chalk, and the internal diameter of described open rearward end (3) is suitable with human body forefinger diameter.
2. the simple and easy chalk end fixture of one according to claim 1, it is characterized in that: the outline of described front opening (2) is a taper surface one (7), inner surface is the combination of a face of cylinder one (4) and taper surface two (5), a boosting bar (6) is fitted with in described columniform front opening (2), described open rearward end (3) outline is a cylinder, inner surface is a face of cylinder two (8), and the described face of cylinder two (8) is docked with taper surface two (5).
3. the simple and easy chalk end fixture of one according to claim 2, it is characterized in that: described boosting bar (6) outline is the structure be butted into by the face of cylinder three (9), taper surface three (10) and the face of cylinder four (11), the described face of cylinder three (9) is suitable with the face of cylinder one (4), described taper surface three (10) is suitable with taper surface two (5), and the described face of cylinder four (11) is suitable with the face of cylinder two (8).
4. the simple and easy chalk end fixture of one according to claim 2, is characterized in that: the tail end of described boosting bar (6) is fixedly installed a rubber blanket (12).
5. the simple and easy chalk end fixture of one according to claim 2, is characterized in that: the outer surface of described open rearward end (3) is provided with a recess (13) pressed in order to thumb.
6. the simple and easy chalk end fixture of one according to claim 4, is characterized in that: the breech face of described boosting bar (6) is provided with the jack (61) of a T-shaped structure, corresponding rubber blanket (12) is provided with the plug (62) of a T-shaped structure.
7. the simple and easy chalk end fixture of one according to claim 6, is characterized in that: the external diameter of described rubber blanket is identical with the external diameter of boosting bar (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420813925.3U CN204451634U (en) | 2014-12-22 | 2014-12-22 | A kind of simple and easy chalk end fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420813925.3U CN204451634U (en) | 2014-12-22 | 2014-12-22 | A kind of simple and easy chalk end fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204451634U true CN204451634U (en) | 2015-07-08 |
Family
ID=53658571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420813925.3U Expired - Fee Related CN204451634U (en) | 2014-12-22 | 2014-12-22 | A kind of simple and easy chalk end fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204451634U (en) |
-
2014
- 2014-12-22 CN CN201420813925.3U patent/CN204451634U/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: 20150708 Termination date: 20151222 |
|
| EXPY | Termination of patent right or utility model |