CN208730625U - A kind of chalk sleeve for preventing dirty hand - Google Patents
A kind of chalk sleeve for preventing dirty hand Download PDFInfo
- Publication number
- CN208730625U CN208730625U CN201820212964.6U CN201820212964U CN208730625U CN 208730625 U CN208730625 U CN 208730625U CN 201820212964 U CN201820212964 U CN 201820212964U CN 208730625 U CN208730625 U CN 208730625U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- push rod
- tightening portion
- chalk
- dustproof part
- 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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- Pens And Brushes (AREA)
Abstract
The utility model discloses a kind of chalk sleeves for preventing dirty hand, including sleeve, push rod, tightening portion and dustproof part, sleeve and push rod are cylindrical structure, and one end of the big one end of the bore in tightening portion and sleeve is fixedly linked, and the front end in tightening portion is uniformly provided with several gap around its axle center；The front end of push rod is protruded into sleeve, and push rod is connect with bush whorl, and the front end of push rod is also fixedly installed with the rubber base of U-shaped structure, and the open end upper cover of push rod is equipped with end cap；Dustproof part is hollow frustum cone structure, and dustproof part is sheathed on one end that on sleeve and it is open small and is fixedly linked with sleeve, and the small one end that is open of dustproof part is towards tightening portion.The utility model structure is simple, easy to use, can effectively prevent teacher using chalk is infected with when chalk on hand and considers phenomenon to be worth doing, while can increase the use length of chalk, easy to hold.
Description
Technical field
The utility model relates to realia fields, are related specifically to a kind of chalk sleeve for preventing dirty hand.
Background technique
Chalk is tool widely used in daily life, is generally used for being written on blackboard, and user is mostly teacher.Always
Teacher's phase is taken with hand and holds chalk, and chalk dust is easily sticked on hand, not only unclean, but also chalk dust can make hand burn into be cracked,
Seriously affect health.Traditional chalk is shorter, user take hold when it is more inconvenient, especially when chalk is with to tail portion, often
Often, to can abandon, it can cause to waste because of too short and small and bad use；And teacher at school when would generally use one to
Two chalks, teacher can generally take a box chalk spare thus, using being inconvenient.
Utility model content
The purpose of this utility model is that aiming at the shortcomings in the prior art, a kind of chalk sleeve for preventing dirty hand is provided, with solution
The certainly above problem.
The technical issues of the utility model is solved can be realized using following technical scheme:
A kind of chalk sleeve for preventing dirty hand, including sleeve, push rod, tightening portion and dustproof part, the sleeve and push rod are circle
Column construction, the internal cavities of sleeve and its both ends are open, and tightening portion is the truncated cone-shaped structure of internal cavities and its both ends is equal
Opening, the rear end in tightening portion and one end of sleeve are fixedly linked, and the bore of its rear end is greater than the bore of its front end, tightening portion
Front end is uniformly provided with several gap around its axle center, and extending direction of the gap along tightening portion opens up；The front end of push rod is protruded into
In sleeve, the outer wall of push rod is equipped with external screw thread, and the inner wall of sleeve is equipped with the internal screw thread matched with the external screw thread of push rod, pushes away
The front end of bar is also fixedly installed with the rubber base of U-shaped structure, the internal cavities of push rod and thereafter end opening, on the open end of push rod
It is covered with end cap；The dustproof part is hollow frustum cone structure, and dustproof part is sheathed on one end and set that on sleeve and it is open small
Cylinder is fixedly linked, and small one end of opening of dustproof part is towards tightening portion.
Further, the sleeve and tightening portion are integrally formed, and are equipped with foam-rubber cushion on the inner wall in tightening portion.
Further, the length of the push rod is not less than the length of a chalk.
Further, the sleeve and tightening portion are stainless steel material.
Compared with prior art, the beneficial effects of the utility model are as follows:
The utility model is compact structure and easy to use, chalk when can effectively reduce teacher's chalk-writing by dustproof part
Bits directly descend slowly and lightly it is upper teacher on hand, clean the hand holding of teacher.Foam-rubber cushion not only can effective protection powder when in use
Pen, avoids chalk from being broken, while can also adsorb certain dust, reduces injury of the dust to user.Push rod can both lead to
Cross screw thread and release chalk from sleeve, and can be used as storage chamber use, if teacher at school when in sleeve plus one
Chalk and in push rod plus a chalk, without the whole box chalk of band one, while can also increase the length of chalk sleeve, side
Just user takes and holds, and an object three is used, easy to use.Sleeve and tightening portion are stainless steel material, and cooperation tightening be portion and chalk
The truncated cone-shaped structure and gap that shape matches make the front end in tightening portion have certain elastic tightening effect, prevent chalk
It is dropped out from sleeve.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the chalk sleeve described in the utility model for preventing dirty hand.
Specific embodiment
To be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, below
In conjunction with specific embodiment, the utility model is further described.
Referring to Fig. 1, a kind of chalk sleeve for preventing dirty hand described in the utility model, including sleeve 10, push rod 20, tightening portion 30
With dustproof part 40.Sleeve 10 and push rod 20 are cylindrical structure, internal cavities of sleeve 10 and its both ends is open.Tightening portion
30 be the truncated cone-shaped structure of internal cavities and its both ends is open.The rear end in tightening portion 30 and one end of sleeve 10 are fixedly linked,
And the bore of its rear end is greater than the bore of its front end.The front end in tightening portion 30 is uniformly provided with several gap 31 around its axle center, slits
Extending direction of the mouth 31 along tightening portion 30 opens up.The front end of push rod 20 is protruded into sleeve 10, and the outer wall of push rod 20 is equipped with outer spiral shell
Line, the inner wall of sleeve 10 are equipped with the internal screw thread 11 matched with the external screw thread of push rod 20.The front end of push rod 20 is also fixedly mounted
There is the rubber base 50 of U-shaped structure.Chalk need to be only added in sleeve 10 when use and be located at the major part of chalk in rubber base 50,
Rotating push rod 20 can make push rod 20 that will slowly release from sleeve 10 respectively.The internal cavities of push rod 20 and thereafter end opening,
The open end upper cover of push rod 20 is equipped with end cap 60.Dustproof part 40 is hollow frustum cone structure, and dustproof part 40 is sheathed on sleeve 10
And its one end for being open small is fixedly linked with sleeve 10, small one end of opening of dustproof part 40 is towards tightening portion 30.It is old when use
Teacher takes the sleeve for holding 40 rear side of dustproof part, and chalk bits are direct when can effectively reduce teacher's chalk-writing by dustproof part 40
On descending slowly and lightly teacher on hand, make teacher hand keep cleaning.
Sleeve 10 and tightening portion 30 are integrally formed, and are equipped with foam-rubber cushion on the inner wall in tightening portion 30.Foam-rubber cushion not only can be with
Effective protection chalk when in use avoids chalk from being broken, while can also adsorb certain dust, reduces dust to user's
Injury.
The length of push rod 20 is not less than the length of a chalk, and at least piece of chalk can be placed in push rod 20.Push rod
20 can not only be released chalk by screw thread from sleeve 10, but can be used as storage chamber use, as long as teacher at school when
Add a chalk in sleeve 10 and add a chalk in push rod 20, without the whole box chalk of band one, while can also increase
The length of long chalk sleeve is held convenient for users to taking, and an object three is used, easy to use.
Sleeve 10 and tightening portion 30 are stainless steel material, cooperate the truncated cone-shaped matched with chalk shape in tightening portion 30
Structure and gap 31 make the front end in tightening portion 30 have certain elastic tightening effect, prevent chalk from dropping out from sleeve 10.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (4)
1. a kind of chalk sleeve for preventing dirty hand, it is characterised in that: including sleeve, push rod, tightening portion and dustproof part, the sleeve and push away
Bar is cylindrical structure, internal cavities of sleeve and its both ends is open, tightening portion be the truncated cone-shaped structure of internal cavities and
Its both ends is open, and the rear end in tightening portion and one end of sleeve are fixedly linked, and the bore of its rear end is greater than the bore of its front end,
The front end in tightening portion is uniformly provided with several gap around its axle center, and extending direction of the gap along tightening portion opens up；Push rod
Front end is protruded into sleeve, the outer wall of push rod is equipped with external screw thread, and the inner wall of sleeve is equipped with to be matched with the external screw thread of push rod
Internal screw thread, the front end of push rod are also fixedly installed with the rubber base of U-shaped structure, the internal cavities of push rod and thereafter end opening, push rod
Open end upper cover be equipped with end cap；The dustproof part is hollow frustum cone structure, and dustproof part is sheathed on sleeve and its opening is small
One end be fixedly linked with sleeve, small one end of opening of dustproof part is towards tightening portion.
2. the chalk sleeve according to claim 1 for preventing dirty hand, it is characterised in that: the sleeve and tightening portion are integrally formed,
Foam-rubber cushion is installed on the inner wall in tightening portion.
3. the chalk sleeve according to claim 1 for preventing dirty hand, it is characterised in that: the length of the push rod is not less than a powder
The length of pen.
4. the chalk sleeve according to claim 1 for preventing dirty hand, it is characterised in that: the sleeve and tightening portion are stainless steel
Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820212964.6U CN208730625U (en) | 2018-02-07 | 2018-02-07 | A kind of chalk sleeve for preventing dirty hand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820212964.6U CN208730625U (en) | 2018-02-07 | 2018-02-07 | A kind of chalk sleeve for preventing dirty hand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208730625U true CN208730625U (en) | 2019-04-12 |
Family
ID=66023151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820212964.6U Expired - Fee Related CN208730625U (en) | 2018-02-07 | 2018-02-07 | A kind of chalk sleeve for preventing dirty hand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208730625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108274921A (en) * | 2018-02-07 | 2018-07-13 | 嘉善信息技术工程学校 | A kind of chalk sleeve for preventing dirty hand |
-
2018
- 2018-02-07 CN CN201820212964.6U patent/CN208730625U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108274921A (en) * | 2018-02-07 | 2018-07-13 | 嘉善信息技术工程学校 | A kind of chalk sleeve for preventing dirty hand |
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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: 20190412 Termination date: 20210207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |