CN202641103U - Chalk writing isolation sleeve for teaching - Google Patents
Chalk writing isolation sleeve for teaching Download PDFInfo
- Publication number
- CN202641103U CN202641103U CN 201220318269 CN201220318269U CN202641103U CN 202641103 U CN202641103 U CN 202641103U CN 201220318269 CN201220318269 CN 201220318269 CN 201220318269 U CN201220318269 U CN 201220318269U CN 202641103 U CN202641103 U CN 202641103U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- chalk
- teaching
- wall
- rubber ring
- 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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Abstract
The utility model provides a chalk writing isolation sleeve for teaching, and relates to the technical field of teaching aiding tools. The chalk writing isolation sleeve for the teaching comprises a sleeve, a sliding block, a screw rod, a fastening nut, an elastic rubber ring and a soft hair brush, and is characterized in that the sliding block matched with the inner diameter of the sleeve is sleeved on the inner side of the sleeve in a sliding mode, the outer wall of the sleeve is provided with anti-sliding stripes, the screw rod vertically fixed on the side wall of the sliding block penetrates through an axial through hole in the wall of the sleeve and is in threaded connection with the fastening nut, the center of the left end face of the sliding block is provided with a circular concave groove, the inner diameter of the circular concave groove is matched with the outer diameter of a piece of chalk, the inner wall of an opening end of the sleeve is provided with the elastic rubber ring matched with the circular concave groove, the inner diameter of the elastic rubber ring is smaller than the outer diameter of the piece of chalk, and the outer wall of the bottom of the sleeve is fixedly connected with the soft hair brush. The chalk writing isolation sleeve for teaching has the advantages that a hand can be prevented from being directly contacted with the piece of chalk, and the hand keeps clean and hygienic; and the outer wall of the bottom of the sleeve is provided with the soft hair brush, when an individual wrongly written character is written on a blackboard, the wrongly written character can be wiped at any time through the soft hair brush, and accordingly the chalk writing isolation sleeve for the teaching is convenient to use.
Description
Technical field: the utility model relates to teaching appurtenance technical field, specifically a kind of chalk writing spacer sleeve for teaching.
Background technology: chalk is the staple that school teacher writes at blackboard, points directly to contact with chalk when writing, and often expires after class the powder that hand is white for one, and the adversary pollutes, healthy unfavorable to the people; And when the indivedual wrongly written characters during to blackboard writing are wiped, because the ordinary blackboard eraser volume is larger, often a plurality of words are wiped simultaneously, it is very inconvenient to use.
Summary of the invention: the purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of hand of can not only avoiding directly to contact with chalk, and can also Convenient scrubber except the chalk writing spacer sleeve for teaching of indivedual wrongly written characters.
The purpose of this utility model is achieved in that this chalk writing spacer sleeve for teaching is comprised of sleeve, slide block, screw rod, clamp nut, elastic rubber ring, banister brush, the sleeve inner that outer wall is provided with anti-skidding striped is slided and to be set with the slide block that adapts with its internal diameter, and vertical fixing screw rod is threaded with clamp nut after passing axially extending bore above the sleeve wall above the slider side wall; Center, slide block left side is provided with the circular spill that internal diameter and chalk external diameter adapt, and sleeve opening end inwall is provided with the internal diameter corresponding with circular groove less than the elastic rubber ring of chalk external diameter, and outer wall is being connected and fixed banister brush at the bottom of the sleeve cylinder.
During use, after chalk being passed elastic rubber ring and inserting circular groove above the slide block just hand-holdable sleeve write, moving slider can be released chalk gradually.
Advantage of the present utility model: can avoid hand directly to contact with chalk, keep the sanitation and hygiene of hand; And outer wall is provided with banister brush at the bottom of the sleeve cylinder, when when blackboard has been write indivedual wrongly written character, can with banister brush wrong word be wiped at any time, and is very easy to use.
Description of drawings: accompanying drawing 1 is structure cutaway view of the present utility model.
The specific embodiment: be described in further detail below in conjunction with 1 pair of the utility model of accompanying drawing: this chalk writing spacer sleeve for teaching is comprised of sleeve 1, slide block 2, screw rod 3, clamp nut 4, elastic rubber ring 5, banister brush 6, sleeve 1 slides within that outer wall is provided with anti-skidding striped is being set with the slide block 2 that adapts with its internal diameter, and vertical fixing screw rod 3 is threaded with clamp nut 4 after passing axially extending bore above sleeve 1 barrel above slide block 2 sidewalls; Center, slide block 2 left side is provided with the circular spill that internal diameter and chalk external diameter adapt, and sleeve 1 opening end inwall is provided with the internal diameter corresponding with circular groove less than the elastic rubber ring 5 of chalk external diameter, and outer wall is being connected and fixed banister brush 6 at the bottom of 1 in the sleeve.
Claims (1)
1. chalk writing spacer sleeve for teaching, formed by sleeve (1), slide block (2), screw rod (3), clamp nut (4), elastic rubber ring (5), banister brush (6), it is characterized in that outer wall is provided with the sleeve of anti-skidding striped (1) slides within and is being set with the slide block (2) that adapts with its internal diameter, be threaded with clamp nut (4) after the screw rod (3) that slide block (2) is vertically fixed above the sidewall passes the axially extending bore of sleeve (1) above the barrel; Slide block (2) center, left side is provided with the circular spill that internal diameter and chalk external diameter adapt, sleeve (1) opening end inwall is provided with the internal diameter corresponding with circular groove less than the elastic rubber ring (5) of chalk external diameter, and sleeve (1) cylinder end outer wall is being connected and fixed banister brush (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220318269 CN202641103U (en) | 2012-06-16 | 2012-06-16 | Chalk writing isolation sleeve for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220318269 CN202641103U (en) | 2012-06-16 | 2012-06-16 | Chalk writing isolation sleeve for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202641103U true CN202641103U (en) | 2013-01-02 |
Family
ID=47410260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220318269 Expired - Fee Related CN202641103U (en) | 2012-06-16 | 2012-06-16 | Chalk writing isolation sleeve for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202641103U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110861429A (en) * | 2018-08-28 | 2020-03-06 | 成都友谊教学设备有限公司 | Chalk sleeve for teaching |
-
2012
- 2012-06-16 CN CN 201220318269 patent/CN202641103U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110861429A (en) * | 2018-08-28 | 2020-03-06 | 成都友谊教学设备有限公司 | Chalk sleeve for teaching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20130616 |