CN208714751U - A kind of chalk breakage-preventing driving means - Google Patents
A kind of chalk breakage-preventing driving means Download PDFInfo
- Publication number
- CN208714751U CN208714751U CN201821007151.XU CN201821007151U CN208714751U CN 208714751 U CN208714751 U CN 208714751U CN 201821007151 U CN201821007151 U CN 201821007151U CN 208714751 U CN208714751 U CN 208714751U
- Authority
- CN
- China
- Prior art keywords
- hand
- outer tube
- chalk
- held outer
- driving means
- 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
Links
- 239000012634 fragment Substances 0.000 claims abstract description 12
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 235000005121 Sorbus torminalis Nutrition 0.000 claims description 3
- 244000152100 Sorbus torminalis Species 0.000 claims description 3
- 238000005056 compaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
The utility model discloses a kind of chalk breakage-preventing driving means, comprising: hand-held outer tube and push inner tube, the inner wall bottom evagination of the hand-held outer tube is provided with several triangle fixture blocks, the threaded hole being provided on the inner wall of the hand-held outer tube above triangle fixture block, the push inner tube is arranged concentrically in hand-held outer tube and outer circle bottom is provided with one section of external screw thread corresponding with threaded hole, revolving fragment is provided at the top of the push inner tube, the outside of the hand-held outer tube is cylindrical structure or circular cone structure.Chalk breakage-preventing driving means described in the utility model, after chalk is put into hand-held outer tube, gyratory compaction is carried out using push inner tube, it avoids stuck, and adjusts the length that hand-held outer tube bottom end is extended in chalk bottom, both guarantee to write convenience, fracture is avoided the problem that again, triangle fixture block dimpling can carry out multi-angle clamping to the chalk at middle part, improve the stability of chalk in the inner wall surface of hand-held outer tube.
Description
Technical field
The utility model relates to teaching equipment field more particularly to a kind of chalk breakage-preventing driving means.
Background technique
Chalk is relatively common teaching aid.It is usually white, in order to enrich the performance content of chalk, also chromatic colour
Chalk, but be typically easy to generate dust, the hand of user is polluted, and chalk fragile structure, is easily broken off,
And be difficult to hold after writing to certain length, waste is serious.
In order to extend the service life of chalk, reduce pollution of the chalk to hand, in the prior art there are many chalk sleeve or
Person's chalk clamp carries out the package of chalk, but existing chalk sleeve or chalk clamp, and it is stuck to there is a problem of that chalk is easy, difficult
With adjustment length, stability is poor or chalk put chalk clamp into after pull out use again with hand, can also pollute hand in use
Portion needs to improve.
Utility model content
The purpose of this utility model is to provide a kind of chalk breakage-preventing driving means, the adjusting promoted in use process is convenient
Property and structural stability, avoid stuck problem.
For this purpose, the utility model uses following technical scheme:
A kind of chalk breakage-preventing driving means, comprising: hold outer tube and push inner tube, outside the inner wall bottom of the hand-held outer tube
Projection is equipped with several triangle fixture blocks, the threaded hole being provided with above triangle fixture block on the inner wall of the hand-held outer tube,
The push inner tube is arranged concentrically in hand-held outer tube and outer circle bottom is provided with one section of external screw thread corresponding with threaded hole, described
Revolving fragment is provided at the top of push inner tube, the outside of the hand-held outer tube is cylindrical structure or circular cone structure.
Wherein, the outside of the hand-held outer tube is provided with anti-skid chequer.
Wherein, the quantity of the triangle fixture block is 3 ~ 5, and annular array is arranged on the inner wall of hand-held outer tube.
Wherein, the center line of hand-held outer tube is directed toward at the tip of the triangle fixture block.
Wherein, the hand-held outer tube and triangle fixture block are integrated plastic construction.
Wherein, annular array is provided with circular arc protrusion in the outer circle of the revolving fragment, be provided in the middle part of the revolving fragment with
The corresponding through-hole of pipe orifice in pushing.
Wherein, the push bottom of inner tube is provided with plugging plate.
Wherein, the plugging plate, push inner tube and revolving fragment are integrated plastic construction.
The utility model has the beneficial effects that a kind of chalk breakage-preventing driving means, after chalk is put into hand-held outer tube, using pushing away
It send inner tube to carry out gyratory compaction, avoids stuck, and adjust the length that hand-held outer tube bottom end is extended in chalk bottom, both guarantee to write
Convenience, and avoid the problem that fracture, the utilization rate of chalk is improved, triangle fixture block dimpling is in the inner wall table of hand-held outer tube
Face can carry out multi-angle clamping to the chalk at middle part, and be embedded in 0.2 ~ 0.5mm of chalk surface, improve the stability of chalk,
The adaptability to chalk outer diameter is strengthened, avoids the problem that chalk is thrown away, when use is more stable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The technical solution of the utility model is further illustrated below with reference to Fig. 1 and by specific embodiment.
A kind of chalk breakage-preventing driving means, comprising: hand-held outer tube 5 and push inner tube 2, the inner wall bottom of the hand-held outer tube 5
Portion's evagination is provided with several triangle fixture blocks 7, and the quantity of the triangle fixture block 7 is 3 ~ 5, and annular array setting is hand-held outer
On the inner wall of pipe 5.3 ~ 57 dimplings of triangle fixture block can carry out the chalk at middle part more in the inner wall surface of hand-held outer tube 5
Angle clamping, improves the stability of chalk, avoids the problem of chalk is thrown away.
The center line of hand-held outer tube 5 is directed toward at the tip of the triangle fixture block 7, so that 7 tip of triangle fixture block is embedded in powder
0.2 ~ 0.5mm of surface, strengthens the adaptability to chalk outer diameter.
The threaded hole 6 being provided on the inner wall of the hand-held outer tube 5 above triangle fixture block 7, the push inner tube 2
It is arranged concentrically in hand-held outer tube 5 and outer circle bottom is provided with one section of external screw thread 1 corresponding with threaded hole 6, push inner tube 2 rotates
When, the chalk in hand-held outer tube 5 can be pushed, the length of hand-held 5 bottom end of outer tube is extended in control chalk bottom, both protects
Certificate writes convenience, but avoid the problem that fracture, improve the utilization rate of chalk, operate conveniently, and adjustment process finger without
The problem of chalk need to be infected with, avoid pollution hand, when teaching is prepared lessons, more chalk breakage-preventing driving means can be prepared, filled
Good chalk guarantees the use of teaching, promotes efficiency of teaching.
The top of the push inner tube 2 is provided with revolving fragment 3, and annular array is provided with circle in the outer circle of the revolving fragment 3
Arc protrusion, such as plum-shaped structure, facilitate rotation process, are provided in the middle part of the revolving fragment 3 corresponding with push 2 inner hole of inner tube
Through-hole reduces weight, facilitates injection molded.
The outside of the hand-held outer tube 5 is cylindrical structure or circular cone structure, facilitates hand-held, hand when writing
The outside for holding outer tube 5 is provided with anti-skid chequer, good antiskid effect.The hand-held outer tube 5 and triangle fixture block 7 are integrated plastics knot
Structure, injection molded, production convenience.
2 bottom of push inner tube is provided with plugging plate 4, and the convenient push to chalk avoids entering push at the top of chalk
Inner tube 2 and stuck problem.The plugging plate 4, push inner tube 2 and revolving fragment 3 are integrated plastic construction, stable structure.
The above content is only the preferred embodiment of the utility model, for those of ordinary skill in the art, according to this reality
With novel thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as
Limitations of the present invention.
Claims (7)
1. a kind of chalk breakage-preventing driving means characterized by comprising hand-held outer tube and push inner tube, the hand-held outer tube
Inner wall bottom evagination is provided with several triangle fixture blocks, is provided with above triangle fixture block on the inner wall of the hand-held outer tube
Threaded hole, the push inner tube is arranged concentrically in hand-held outer tube and outer circle bottom be provided with one section corresponding with threaded hole it is outer
Screw thread, revolving fragment is provided at the top of the push inner tube, and the outside of the hand-held outer tube is cylindrical structure or the frustum of a cone
Structure, the push bottom of inner tube are provided with plugging plate.
2. chalk breakage-preventing driving means according to claim 1, which is characterized in that the outside of the hand-held outer tube is provided with
Anti-skid chequer.
3. chalk breakage-preventing driving means according to claim 1, which is characterized in that the quantity of the triangle fixture block be 3 ~
5, annular array is arranged on the inner wall of hand-held outer tube.
4. chalk breakage-preventing driving means according to claim 1, which is characterized in that be directed toward at the tip of the triangle fixture block
The center line of hand-held outer tube.
5. chalk breakage-preventing driving means according to claim 1, which is characterized in that the hand-held outer tube and triangle fixture block
For integrated plastic construction.
6. chalk breakage-preventing driving means according to claim 1, which is characterized in that circular array in the outer circle of the revolving fragment
Column are provided with circular arc protrusion, and through-hole corresponding with interior pipe orifice is pushed is provided in the middle part of the revolving fragment.
7. chalk breakage-preventing driving means according to claim 1, which is characterized in that the plugging plate, push inner tube and rotation
Rotor is integrated plastic construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821007151.XU CN208714751U (en) | 2018-06-28 | 2018-06-28 | A kind of chalk breakage-preventing driving means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821007151.XU CN208714751U (en) | 2018-06-28 | 2018-06-28 | A kind of chalk breakage-preventing driving means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208714751U true CN208714751U (en) | 2019-04-09 |
Family
ID=65972228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821007151.XU Expired - Fee Related CN208714751U (en) | 2018-06-28 | 2018-06-28 | A kind of chalk breakage-preventing driving means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208714751U (en) |
-
2018
- 2018-06-28 CN CN201821007151.XU patent/CN208714751U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190409 |