CN204322813U - The dust-proof intubate of teaching chalk - Google Patents
The dust-proof intubate of teaching chalk Download PDFInfo
- Publication number
- CN204322813U CN204322813U CN201420772034.8U CN201420772034U CN204322813U CN 204322813 U CN204322813 U CN 204322813U CN 201420772034 U CN201420772034 U CN 201420772034U CN 204322813 U CN204322813 U CN 204322813U
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- intubate
- chalk
- shell fragment
- diameter
- dust
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Abstract
The utility model discloses the dust-proof intubate of a kind of teaching chalk, comprise intubate, intubate is hollow circular-tube, and length is greater than the length of chalk; Be provided with multiple fixed structure in intubate, fixed structure is distributed on cannula interior, is evenly distributed in each vertical plane of intubate, and each fixed structure structure is identical, by shell fragment and spring composition; Wherein, described shell fragment is rotatable to be arranged on the inwall of intubate, and the front end of shell fragment is arc-shaped, and the diameter of the circular arc formed in each vertical plane of intubate is less than the diameter of chalk, and the medial surface of shell fragment is all connected with the inwall of intubate by spring.The utility model structure is simple, easy to make, ensure that making full use of of chalk; Meanwhile, making full use of of chalk, avoids situation about being dropped, and then prevents because being trampled, roll and the dust brought to the destruction of the healthy harm of user and environment, meet the requirement of national green environmental protection, there are market prospects widely.
Description
Technical field
The utility model relates to a kind of chalk intubate, and specifically the dust-proof intubate of a kind of teaching chalk, belongs to stationery technical field of auxiliary equipment.
Background technology
Chalk is the instrument widely used in daily life, is generally used for book and writes on the blackboard.Along with the development of society, the material kind of the use of chalk also gets more and more.
At present, the chalk of domestic use mainly contains common chalk and dust-free chalk two kinds, and its main component is calcium carbonate (lime stone) and calcium sulfate (gypsum), or containing a small amount of calcium oxide.These add by powder the chalks suppressed after adhesive and are easily fractureed in the process of writing, and when chalk write soon only remain a chalk end time, hand is difficult to catch, generation dysgraphia.Therefore little chalk can be fully used.In general, time chalk is fractureed or only remains chalk end, people habitually can abandon them, virtually add the consumption of chalk.But the chalk be dropped can because trample, to roll etc. and leave the marking at ground desktop and affect environment, dust of its generation simultaneously also can affect the healthy of user.
Utility model content
For above-mentioned prior art Problems existing, the utility model provides a kind of teaching chalk dust-proof intubate, structure is simple, easy to make, guarantee that chalk makes full use of, meanwhile, avoid causing being trampled because being dropped, roll and the dust brought to the destruction of the healthy harm of user and environment.
To achieve these goals, the utility model provides the dust-proof intubate of a kind of teaching chalk, comprises intubate, and intubate is hollow circular-tube, and length is greater than the length of chalk; Be provided with multiple fixed structure in intubate, fixed structure is distributed on cannula interior, is evenly distributed in each vertical plane of intubate, and each fixed structure structure is identical, by shell fragment and spring composition; Wherein, described shell fragment is rotatable to be arranged on the inwall of intubate, and the front end of shell fragment is arc-shaped, and the diameter of the circular arc formed in each vertical plane of intubate is less than the diameter of chalk, and the medial surface of shell fragment is all connected with the inwall of intubate by spring.On this basis, in described fixed structure, the back side of shell fragment is all vertically provided with a brake pad, and brake pad is rectangular-shaped, and brake pad that is upper and lower and left and right is corresponding, and the distance between bottom is less than the diameter of chalk; In fixed structure, described shell fragment, spring and brake pad all use identical material for material, and concrete use stainless steel or aluminium alloy are material.
Further, intubate entirety is skewed, and outside and inner diameter all directly increase successively from front end to rear end, and wherein, the maximum gauge of the circular arc that the front end of shell fragment forms in each vertical plane of intubate is less than the diameter of chalk.
Further, overall stepped outside intubate, the outer dia of front end is less than the diameter of tail end, and cannula interior is also stepped, and the diameter of intubate tail end inside is identical with intubate front end outer dia; The corresponding bonnet of intubate tail end, bonnet is fixedly connected sequentially by jacking block, fixed cap and pull bar and forms; Wherein, jacking block is cylindrical, and diameter is consistent with intubate front end outer dia, and fixed cap is cylindrical, consistent with the diameter of intubate tail end inside, and is connected by crowded formula, screw-type or buckle-type with intubate tail end inside.
Preferably, in each vertical plane of intubate, be provided with four fixed structures, in 90 ° of distributions.
Preferably, in each vertical plane of intubate, be provided with three fixed structures, in 120 ° of distributions.
Preferably, cannula material uses plastics to be material.
Preferably, spring is many, is evenly connected between the medial surface of shell fragment and the inwall of intubate.
Operation principle: intubate of the present utility model is hollow circular-tube, length is 20-25cm, inserts many chalks successively, till stretching out until chalk head the length that can write from intubate front end; Now, shell fragment is subjected to displacement due to the pressure active position of chalk, and chalk is fixed in intubate by the elastic force of its spring.When writer writes writing on the blackboard, because blackboard gives chalk end pressure backward, make it the movement tendency produced backward, due to the one-way conduction characteristic of shell fragment, chalk can clamp and make it to move backward again by shell fragment, and now chalk can normally be write.When chalk is soon used up, be inserted into intubate 1 tail end and continue to use.The utility model also add bonnet, and bonnet is fixedly connected sequentially by jacking block, fixed cap and pull bar and forms; Wherein, jacking block is cylindrical, and diameter is consistent with intubate front end outer dia, and fixed cap is cylindrical, consistent with the diameter of intubate tail end inside, and is connected by crowded formula, screw-type or buckle-type with intubate tail end inside.Overall structure advances the tail end of intubate in use by pull bar, prevent shell fragment Long-Time Service and cause elasticity to weaken, and cannot ensure to insert the stable of chalk, avoids dust to spill from the tail end of intubate simultaneously.
On this basis, in fixed structure, the back side of shell fragment is all vertically provided with a brake pad, brake pad is rectangular-shaped, and brake pad that is upper and lower and left and right is corresponding, and the distance between bottom is less than the diameter of chalk, owing to processing the surface of chalk, guarantee the smooth of surface; In addition, in fixed structure, shell fragment, spring and brake pad all use identical material for material, and concrete use stainless steel or aluminium alloy are material, guarantee service life.
In conjunction with operation principle, the utility model structure is simple, easy to make, ensure that making full use of of chalk, meets the requirement that national energy-saving reduces discharging; Meanwhile, making full use of of chalk, avoids situation about being dropped, and then prevents because being trampled, roll and the dust brought to the destruction of the healthy harm of user and environment, meet the requirement of national green environmental protection, there are market prospects widely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is left view of the present utility model;
Fig. 3 is the utility model
the schematic enlarged-scale view at place.
In figure: 1, intubate, 2, spring, 3, shell fragment, 4, bonnet, 5, jacking block, 6, fixed cap, 7, pull bar, 8, fixed structure, 9, chalk, 10, brake pad.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further.
As depicted in figs. 1 and 2, the dust-proof intubate of a kind of teaching chalk, is characterized in that, comprises intubate 1, and intubate 1 is hollow circular-tube, and length is 20-25cm;
Shown in composition graphs 3, be provided with multiple fixed structure 8 in intubate 1, it is inner that fixed structure 8 is distributed on intubate 1, and be evenly distributed in each vertical plane of intubate 1, each fixed structure 8 structure is identical, forms by shell fragment 3 and spring 2; Wherein, on the rotatable inwall being arranged on intubate 1 of shell fragment 3, the front end that shell fragment 3 is is arc-shaped, and the diameter of the circular arc formed in each vertical plane of intubate 1 is less than the diameter of chalk 9, and the medial surface of shell fragment 3 is all connected by the inwall of spring 2 with intubate 1.On this basis, in fixed structure, the back side of shell fragment is all vertically provided with a brake pad, brake pad is rectangular-shaped, and brake pad that is upper and lower and left and right is corresponding, and the distance between bottom is less than the diameter of chalk, owing to processing the surface of chalk, guarantee the smooth of surface; In addition, in fixed structure, shell fragment, spring and brake pad all use identical material for material, and concrete use stainless steel or aluminium alloy are material, guarantee service life.
Further improve as the utility model, intubate 1 entirety is skewed, and outside and inner diameter all directly increase successively from front end to rear end, and wherein, the maximum gauge of the circular arc that the front end of shell fragment 3 forms in each vertical plane of intubate 1 is less than the diameter of chalk 9.Intubate 1 is made as skewed, guarantees the firm of the chalk 9 inserted, and can be suitable for the chalk 9 of different-diameter simultaneously.
As the preferred mode of the utility model, in each vertical plane of intubate 1, be provided with four fixed structures 8, in 90 ° of distributions, guarantee the firm of the chalk 9 inserted.
As the preferred mode of the utility model, in each vertical plane of intubate 1, be provided with three fixed structures 8, in 120 ° of distributions, guarantee the firm of the chalk 9 inserted.
As the preferred mode of the utility model, intubate 1 materials'use plastics are material, improve hardness and the plasticity of overall intubate 1.
As the preferred mode of the utility model, spring 2 is many, is evenly connected between the medial surface of shell fragment 3 and the inwall of intubate 1, guarantees elasticity, improves the effect of extruding.
During use, in intubate 1, insert many chalks successively, till chalk head stretches out from intubate 1 front end the length that can write; Now, shell fragment 3 is subjected to displacement due to the pressure active position of chalk, and chalk is fixed in intubate 1 by the elastic force of its spring 2.When writer writes writing on the blackboard, because blackboard gives chalk end pressure backward, make it the movement tendency produced backward, due to the one-way conduction characteristic of shell fragment 3, chalk can clamp and make it to move backward again by shell fragment 3, and now chalk can normally be write.When chalk is soon used up, be inserted into intubate 1 tail end and continue to use.
Further, further improve as the utility model, overall stepped outside intubate 1, the outer dia of front end is less than the diameter of tail end, and intubate 1 inside is also stepped, and the diameter of intubate 1 tail end inside is identical with intubate 1 front end outer dia; The corresponding bonnet 4 of intubate 1 tail end, bonnet 4 is fixedly connected sequentially by jacking block 5, fixed cap 6 and pull bar 7 and forms; Wherein, jacking block 5 is cylindrical, and diameter is consistent with intubate 1 front end outer dia, and fixed cap 6 is cylindrical, consistent with the diameter of intubate 1 tail end inside, and is connected by crowded formula, screw-type or buckle-type with intubate 1 tail end inside.Above-mentioned design, prevents shell fragment 3 Long-Time Service and causes elasticity to weaken, and cannot ensure to insert the stable of chalk, avoids dust to spill from the tail end of intubate simultaneously.
The utility model structure is simple, easy to make, ensure that making full use of of chalk, meets the requirement that national energy-saving reduces discharging; Meanwhile, making full use of of chalk, avoids situation about being dropped, and then prevents because being trampled, roll and the dust brought to the destruction of the healthy harm of user and environment, meet the requirement of national green environmental protection, there are market prospects widely.
Claims (7)
1. the dust-proof intubate of teaching chalk, comprises intubate (1), and described intubate (1) is hollow circular-tube, and length is 20-25cm; Multiple fixed structure (8) is provided with in described intubate (1), it is inner that described fixed structure (8) is distributed on intubate (1), be evenly distributed in intubate (1) each vertical plane, each fixed structure (8) structure is identical, by shell fragment (3) and spring (2) composition; Wherein, on the described rotatable inwall being arranged on intubate (1) of shell fragment (3), the front end that shell fragment (3) is is arc-shaped, and the diameter of the circular arc of composition is less than the diameter of chalk (9) in intubate (1) each vertical plane, the medial surface of shell fragment (3) is all connected by the inwall of spring (2) with intubate (1);
It is characterized in that, in described fixed structure (8), the back side of shell fragment (3) is all vertically provided with a brake pad (10), and described brake pad (10) is for rectangular-shaped, brake pad (10) that is upper and lower and left and right is corresponding, and the distance between bottom is less than the diameter of chalk (9);
In described fixed structure (8), described shell fragment (3), spring (2) and brake pad (10) all use identical material for material, and concrete use stainless steel or aluminium alloy are material.
2. the dust-proof intubate of a kind of teaching chalk according to claim 1, it is characterized in that, described intubate (1) entirety is skewed, outside and inner diameter all directly increase successively from front end to rear end, wherein, the maximum gauge of circular arc that the front end of shell fragment (3) forms in intubate (1) each vertical plane is less than the diameter of chalk (9).
3. the dust-proof intubate of a kind of teaching chalk according to claim 1, it is characterized in that, intubate (1) outside is overall stepped, the outer dia of front end is less than the diameter of tail end, intubate (1) inside is also stepped, and the diameter of intubate (1) tail end inside is identical with intubate (1) front end outer dia; The corresponding bonnet (4) of intubate (1) tail end, described bonnet (4) is fixedly connected sequentially by jacking block (5), fixed cap (6) and pull bar (7) and forms; Wherein, jacking block (5) is for cylindrical, and diameter is consistent with intubate (1) front end outer dia, and described fixed cap (6) is for cylindrical, consistent with the diameter of intubate (1) tail end inside, and be connected by crowded formula, screw-type or buckle-type with intubate (1) tail end inside.
4. the dust-proof intubate of a kind of teaching chalk according to claim 1 or 2 or 3, is characterized in that, is provided with four fixed structures (8) in described intubate (1) each vertical plane, in 90 ° of distributions.
5. the dust-proof intubate of a kind of teaching chalk according to claim 1 or 2 or 3, is characterized in that, is provided with three fixed structures (8) in described intubate (1) each vertical plane, in 120 ° of distributions.
6. the dust-proof intubate of a kind of teaching chalk according to claim 1 or 2 or 3, is characterized in that, described intubate (1) materials'use plastics are material.
7. the dust-proof intubate of a kind of teaching chalk according to claim 1 or 2 or 3, is characterized in that, described spring (2) is many, is evenly connected between the medial surface of shell fragment (3) and the inwall of intubate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420772034.8U CN204322813U (en) | 2014-12-10 | 2014-12-10 | The dust-proof intubate of teaching chalk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420772034.8U CN204322813U (en) | 2014-12-10 | 2014-12-10 | The dust-proof intubate of teaching chalk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204322813U true CN204322813U (en) | 2015-05-13 |
Family
ID=53159206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420772034.8U Expired - Fee Related CN204322813U (en) | 2014-12-10 | 2014-12-10 | The dust-proof intubate of teaching chalk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204322813U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108116102A (en) * | 2017-12-22 | 2018-06-05 | 温州习得教育科技有限公司 | A kind of chalk sleeve for being convenient for making full use of chalk |
-
2014
- 2014-12-10 CN CN201420772034.8U patent/CN204322813U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108116102A (en) * | 2017-12-22 | 2018-06-05 | 温州习得教育科技有限公司 | A kind of chalk sleeve for being convenient for making full use of chalk |
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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: 20151210 |
|
| EXPY | Termination of patent right or utility model |