CN205439705U - Compass for teaching - Google Patents
Compass for teaching Download PDFInfo
- Publication number
- CN205439705U CN205439705U CN201620145362.4U CN201620145362U CN205439705U CN 205439705 U CN205439705 U CN 205439705U CN 201620145362 U CN201620145362 U CN 201620145362U CN 205439705 U CN205439705 U CN 205439705U
- Authority
- CN
- China
- Prior art keywords
- straight tube
- teaching
- sliding sleeve
- handle
- compasses
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a compass for teaching belongs to the teaching aid, is to comprise handle, flexible ruler, nonelastic soft area and sucking disc, and through the straight tube intercommunication, the top tip of grip straight tube is equipped with the ooff valve between its handle and the sucking disc, and the bearing to the lower part suit of straight tube, and fixed connection nonelastic soft area on the bearing, nonelasticly softly takes the movable fit and is connecting the sliding sleeve, is fixing the chalk cover on the sliding sleeve, and the straight tube lower part is articulating flexible ruler. The utility model discloses a compass for teaching, simple structure, reasonable in design have that the cost is low, work efficiency is high, and the top tip of straight tube is equipped with the ooff valve and uses with the sucking disc cooperation, has improved its life greatly, and simultaneously flexible ruler can receive and release with the straight tube is parallel, and occupation space is little, be convenient for place and carry, is equipped with the location dogtooth on the sliding sleeve, has improved the precision of drawing the circle.
Description
Technical field
This utility model belongs to teaching aid, particularly relates to a kind of compasses for teaching.
Background technology
nullAt present、In the daily teaching of junior-senior high school，Mathematical education personnel usually need at blackboard upper drawing circle，Most of teachers use traditional big compasses to draw，But traditional big compasses is in " people " font，One foot is to be fixed on blackboard as the center of circle during drafting of ferrum point，Another foot is fixed chalk and is carried out drawing around it，On the wooden blackboard that such compasses are former, using effect is all right，But blackboard is glass material at present、The green plate of audio-visual education programme etc.，Tradition compasses the most do not adapt to the blackboard upper drawing circle in these materials，Because the blackboard panel currently used is the most smooth、During picture, the ferrum point of compasses cannot be fixed on a bit，China Patent No. " 2015208086710 " patent entitled " a kind of Practical compass teaching aid "，Although solving disadvantages described above，But yet suffer from following defect，One is to force to separate it with blackboard after sucker suction、Cause service life short，Two is that ruler is fixing with handle is connected，Ruler length is excessive，Entirety is taken up room bigger，Inconvenience is placed，Three is that the mobile pen clip on nonelastic tightrope does not have positioning function.
Utility model content
This utility model aims to present in background technology not enough, and a kind of compasses for teaching provided.
A kind of compasses for teaching of the present utility model, it is to be made up of handle, Expansion ruler, nonelastic soft ribbons and sucker, connected by straight tube between its handle with sucker, at handle, the top end of straight tube is provided with switch valve, the bottom set of straight tube is filled with bearing, and bearing is fixedly connected nonelastic soft ribbons, the dynamic sliding sleeve that is connected in nonelastic soft ribbons, fixed chalk sleeve on sliding sleeve, straight tube lower hinge Expansion ruler.
As further improvement of the utility model, described straight tube top is provided with ruler locking device.
As further improvement of the utility model, the inside of described straight tube bottom is provided with magnet ring block.
As further improvement of the utility model, described sliding sleeve is provided with location double wedge.
A kind of compasses for teaching of the present utility model, simple in construction, reasonable in design, have that cost is low, work efficiency is high, the top end of straight tube be provided with switch valve and sucker with the use of, substantially increase its service life, simultaneous retractable ruler can folding and unfolding parallel with straight tube, take up room little, be easy to place and carry, sliding sleeve is provided with location double wedge, improves the precision of picture circle.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
1 to a kind of compasses for teaching of the present utility model below in conjunction with the accompanying drawings, is described further.
Embodiment 1
A kind of compasses for teaching of the present utility model, it is to be made up of handle 1, Expansion ruler 2, nonelastic soft ribbons 3 and sucker 4, connected by straight tube 5 between its handle 1 with sucker 4, at handle 1, the top end of straight tube 5 is provided with switch valve 6, the bottom set of straight tube 5 is filled with bearing 7, and bearing 7 is fixedly connected nonelastic soft ribbons 3, the dynamic sliding sleeve 8 that is connected in nonelastic soft ribbons 3, fixed chalk sleeve 9 on sliding sleeve 8, straight tube 5 lower hinge Expansion ruler 2.
Embodiment 2
A kind of compasses for teaching of the present utility model, it is to be made up of handle 1, Expansion ruler 2, nonelastic soft ribbons 3 and sucker 4, connected by straight tube 5 between its handle 1 with sucker 4, at handle 1, the top end of straight tube 5 is provided with switch valve 6, the bottom set of straight tube 5 is filled with bearing 7, and bearing 7 is fixedly connected nonelastic soft ribbons 3, the dynamic sliding sleeve 8 that is connected in nonelastic soft ribbons 3, fixed chalk sleeve 9 on sliding sleeve 8, straight tube 5 lower hinge Expansion ruler 2.Described straight tube 5 top is provided with ruler 2 locking device 12.The inside of straight tube 5 bottom is provided with magnet ring block 10, and existing blackboard major part all can be attracting with magnetic piece, and straight tube 5 fixed by magnet ring block 10 and sucker 4 simultaneously, enhances steadiness.Sliding sleeve 8 is provided with location double wedge 11, it is possible to sliding sleeve 8 is fixed on target length position.
Claims (4)
1. a compasses for teaching, it is by handle (1), Expansion ruler (2), nonelastic soft ribbons (3) and sucker (4) are constituted, it is characterized in that being connected by straight tube (5) between handle (1) with sucker (4), the top end at handle (1) place straight tube (5) is provided with switch valve (6), the bottom set of straight tube (5) is filled with bearing (7), nonelastic soft ribbons (3) it is fixedly connected on bearing (7), the upper dynamic sliding sleeve (8) that is connected of nonelastic soft ribbons (3), the upper fixed chalk sleeve (9) of sliding sleeve (8), straight tube (5) lower hinge Expansion ruler (2).
2. a kind of compasses for teaching as claimed in claim 1, it is characterised in that described straight tube (5) top is provided with the locking device (12) of ruler (2).
3. a kind of compasses for teaching as claimed in claim 1 or 2, it is characterised in that the inside of described straight tube (5) bottom is provided with magnet ring block (10).
4. a kind of compasses for teaching as claimed in claim 1 or 2, it is characterised in that described sliding sleeve (8) is provided with location double wedge (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620145362.4U CN205439705U (en) | 2016-02-27 | 2016-02-27 | Compass for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620145362.4U CN205439705U (en) | 2016-02-27 | 2016-02-27 | Compass for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205439705U true CN205439705U (en) | 2016-08-10 |
Family
ID=56582515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620145362.4U Expired - Fee Related CN205439705U (en) | 2016-02-27 | 2016-02-27 | Compass for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205439705U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654146A (en) * | 2019-09-29 | 2020-01-07 | 黑龙江科技大学 | A multi-functional teaching aid for mathematical education usefulness |
-
2016
- 2016-02-27 CN CN201620145362.4U patent/CN205439705U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654146A (en) * | 2019-09-29 | 2020-01-07 | 黑龙江科技大学 | A multi-functional teaching aid for mathematical education usefulness |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20170227 |