CN204451631U - A kind of chalk sleeve that can prevent chalk from fractureing - Google Patents

A kind of chalk sleeve that can prevent chalk from fractureing Download PDF

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Publication number
CN204451631U
CN204451631U CN201420797272.4U CN201420797272U CN204451631U CN 204451631 U CN204451631 U CN 204451631U CN 201420797272 U CN201420797272 U CN 201420797272U CN 204451631 U CN204451631 U CN 204451631U
Authority
CN
China
Prior art keywords
chalk
sleeve
fractureing
prevent
opening
Prior art date
Application number
CN201420797272.4U
Other languages
Chinese (zh)
Inventor
敬成超
Original Assignee
敬成超
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 敬成超 filed Critical 敬成超
Priority to CN201420797272.4U priority Critical patent/CN204451631U/en
Application granted granted Critical
Publication of CN204451631U publication Critical patent/CN204451631U/en

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Abstract

The utility model relates to a kind of chalk sleeve that can prevent chalk from fractureing, comprise cylindrical chalk sleeve body, described chalk sleeve body upper end is provided with opening, chalk can be inserted by opening and shift out, the diameter of chalk is more bigger than the diameter of described opening, both form extruding fit structure, described chalk sleeve also comprises a mechanism that chalk is moved up and down in chalk sleeve, described mechanism comprises: the base be connected with chalk sleeve lower end, be provided with internal thread in described base, described base connect a bottom with externally threaded support bar.While a kind of chalk sleeve that can prevent chalk from fractureing that the utility model relates to can effectively prevent chalk from use fractureing, chalk can be exhausted, avoid causing waste.

Description

A kind of chalk sleeve that can prevent chalk from fractureing
Technical field
The utility model belongs to chalk sleeve field, especially a kind of chalk sleeve that can prevent chalk from fractureing.
Background technology
Chalk is the conventional apparatus of teaching, but easily to fracture because chalk is long, and uses chalk to write both hands of easily making dirty.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of chalk sleeve that can prevent chalk from fractureing that a kind of structure is simple, reasonable in design, easy to use.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of chalk sleeve that can prevent chalk from fractureing, comprise cylindrical chalk sleeve body, described chalk sleeve body upper end is provided with opening, chalk can be inserted by opening and shift out, the diameter of chalk is more bigger than the diameter of described opening, both form extruding fit structure, it is characterized in that: described chalk sleeve also comprises a mechanism that chalk is moved up and down in chalk sleeve, described mechanism comprises: the base be connected with chalk sleeve lower end, be provided with internal thread in described base, described base connect a bottom with externally threaded support bar.
Described screw rod installs advantage of the present utility model and beneficial effect is:
1, a kind of chalk sleeve that can prevent chalk from fractureing that the utility model relates to can effectively prevent chalk from fractureing.
2, a kind of chalk sleeve that can prevent chalk from fractureing that utility model relates to can exhaust chalk, avoids causing waste.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the partial sectional view of Fig. 1
Detailed description of the invention
Below by specific embodiment, the utility model is described in further detail, and following examples are descriptive, is not determinate, can not limit protection domain of the present utility model with this.
A kind of chalk sleeve that can prevent chalk from fractureing that the utility model relates to, comprise cylindrical chalk sleeve body 1, described chalk sleeve body upper end is provided with opening 4, chalk can be inserted by opening and shift out, the diameter of chalk is more bigger than the diameter of described opening, both form extruding fit structure, innovative point of the present utility model is: described chalk sleeve also comprises a mechanism that chalk is moved up and down in chalk sleeve, described mechanism comprises: the base 2 be connected with chalk sleeve lower end, internal thread is provided with in described base, described base connects a bottom with externally threaded support bar 3, rotating base to the left and right, support bar can move up and down in chalk body, thus promote moving downward of chalk.

Claims (1)

1. the chalk sleeve that can prevent chalk from fractureing, comprise cylindrical chalk sleeve body, described chalk sleeve body upper end is provided with opening, chalk can be inserted by opening and shift out, the diameter of chalk is more bigger than the diameter of described opening, both form extruding fit structure, it is characterized in that: described chalk sleeve also comprises a mechanism that chalk is moved up and down in chalk sleeve, described mechanism comprises: the base be connected with chalk sleeve lower end, be provided with internal thread in described base, described base connect a bottom with externally threaded support bar.
CN201420797272.4U 2014-12-05 2014-12-05 A kind of chalk sleeve that can prevent chalk from fractureing CN204451631U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420797272.4U CN204451631U (en) 2014-12-05 2014-12-05 A kind of chalk sleeve that can prevent chalk from fractureing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420797272.4U CN204451631U (en) 2014-12-05 2014-12-05 A kind of chalk sleeve that can prevent chalk from fractureing

Publications (1)

Publication Number Publication Date
CN204451631U true CN204451631U (en) 2015-07-08

Family

ID=53658568

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420797272.4U CN204451631U (en) 2014-12-05 2014-12-05 A kind of chalk sleeve that can prevent chalk from fractureing

Country Status (1)

Country Link
CN (1) CN204451631U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108973432A (en) * 2018-06-29 2018-12-11 王小兰 A kind of chalk sleeve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108973432A (en) * 2018-06-29 2018-12-11 王小兰 A kind of chalk sleeve

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150708

Termination date: 20151205

EXPY Termination of patent right or utility model