CN203004798U - Teaching aid-compass - Google Patents
Teaching aid-compass Download PDFInfo
- Publication number
- CN203004798U CN203004798U CN 201320026113 CN201320026113U CN203004798U CN 203004798 U CN203004798 U CN 203004798U CN 201320026113 CN201320026113 CN 201320026113 CN 201320026113 U CN201320026113 U CN 201320026113U CN 203004798 U CN203004798 U CN 203004798U
- Authority
- CN
- China
- Prior art keywords
- compass
- arm
- teaching aid
- compasses
- rotating shaft
- 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 relates to a teaching aid-compass used in teaching of a university mathematics teacher. The compass comprises a graduated compass arm, wherein one end of the compass arm is sleeved in a rotary shaft; the bottom of the rotary shaft is positioned in a suction disc; a sliding groove is formed in the compass arm; and a movable pen clip is mounted on the sliding groove. The compass is very convenient for centered drawing and simple for adjusting the diameter of a circle.
Description
Technical field
The utility model relates to a kind of teaching aid that a kind of College Maths teacher uses, a kind of compass teaching aid of the use of imparting knowledge to students specifically.
Background technology
At present, in the mathematical education of university, usually need to be at the blackboard upper drawing circle, most of teachers adopts compasses to draw.Yet the big compasses of using on the classroom at present is comprised of two pin, and a pin has spur, and another angle is chalk fixedly, and such compasses can use on wooden blackboard.But when the Glass blackboard upper drawing circle, the iron point can't be fixed, i.e. the fixing center of circle; In addition, this lambdoid compasses, handle from blackboard slightly away from, can't accurately control radius of a circle; Draw curve or the major diameter bowlder of reducing when needs, and inconvenient.
The utility model content:
For the problem that existing compass teaching aid exists, the utility model provides a kind of compass teaching aid.This compass teaching aid centering is drawn very convenient, and the circular diameter adjustment is simple.
The technical solution of the utility model is: a kind of compass teaching aid, and comprise and be with graduated compasses arm, described compasses arm one end is sleeved in rotating shaft, and rotating shaft bottom is positioned at sucker, and the compasses arm is provided with chute, and mobile pen clip is housed on chute.
As preferably, above-mentionedly be positioned at the rotation axle head pocketed springs of sucker and connect back of the body cap.
As preferably, described compasses arm is the telescopic arm of adjustable-length.
As preferably, described mobile pen clip lower end is provided with elastic opening.
All be equipped with lock-screw between the upper end of above-mentioned rotating shaft and compasses arm and between mobile pen clip and chute.
The beneficial effects of the utility model are: after adopting technique scheme, only need during draw circles on the classroom sucker both had been adsorbed on blackboard the fixedly center of circle; The compasses arm is made as the telescopic arm of adjustable-length, not the used time nestable can the shortening, be easy to carry, can be according to amount of stretch compasses arm or the mobile pen clip of radius during use, especially when looking for the point-rendering curve according to radius of curvature, when rotating the compasses arm, mobile pen clip, accurately convenient, thus the functional of these compasses increased.
Description of drawings
Fig. 1 is structural representation of the present utility model.
1-compasses arm in figure, the 2-scale, the 3-rotating shaft, the 4-lock-screw, the 5-sucker, 7-carries on the back cap, the 8-spring, the 9-chute, 10-moves pen clip.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
By shown in Figure 1, this compass teaching aid comprises compasses arm 1, rotating shaft 3, sucker interior 5 and pen clip 10, on described compasses arm 1 with scale 2, be used for regulating radius value, above-mentioned compasses arm 1 one ends are sleeved in rotating shaft 3, rotating shaft 3 bottoms are positioned at sucker 5, and compasses arm 1 is provided with the chute 9 of length direction, and mobile pen clip 10 is housed on chute 9.
As preferably, the axle head pocketed springs 8 of the above-mentioned rotating shaft 3 that is positioned at sucker 5 is also fixing by back of the body cap 7, and chalk slightly has wearing and tearing when line, can gently press the upper end of rotating shaft, makes chalk end in contact blackboard, avoids stopping line and adjusts chalk and waste time.
Described compasses arm 1 is the telescopic arm of adjustable-length, nestable compasses arm of used time not, integral body can shorten, be easy to carry, can be according to amount of stretch compasses arm 1 or the mobile pen clip 10 of radius, especially when looking for the point-rendering curve according to radius of curvature during use, when rotating compasses arm 1, mobile pen clip 10, accurately convenient, thus increased the functional of these compasses.
Described mobile pen clip 10 lower ends are provided with elastic opening, facilitate the clamping of chalk.
In addition, 9 of 1, the upper end of above-mentioned rotating shaft 3 and compasses arm and mobile pen clip 10 and chutes all are equipped with lock-screw 4, fix each parts after being used for adjusting radius.
These are only most preferred embodiment of the present utility model, but protection domain is not limited to this, any those of ordinary skill in the art, in the technical scope that the utility model discloses, the variation of expecting easily or replacement all are encompassed in protection domain of the present utility model.
Claims (5)
1. compass teaching aid, comprise the compasses arm (1) with scale (2), it is characterized in that: described compasses arm (1) one end is sleeved in rotating shaft (3), rotating shaft (3) bottom is positioned at sucker (5), compasses arm (1) is provided with chute (9), and mobile pen clip (10) is housed on chute (9).
2. compass teaching aid according to claim 1, is characterized in that: above-mentioned rotating shaft (3) end pocketed springs (8) and the connection back of the body cap (7) that is positioned at sucker (5).
3. compass teaching aid according to claim 1, it is characterized in that: described compasses arm (1) is the telescopic arm of adjustable-length.
4. compass teaching aid according to claim 1 is characterized in that: described mobile pen clip (10) lower end is provided with elastic opening.
5. compass teaching aid according to claim 1, is characterized in that: all be equipped with lock-screw (4) between the upper end of above-mentioned rotating shaft (3) and compasses arm (1) and between mobile pen clip (10) and chute (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320026113 CN203004798U (en) | 2013-01-18 | 2013-01-18 | Teaching aid-compass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320026113 CN203004798U (en) | 2013-01-18 | 2013-01-18 | Teaching aid-compass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203004798U true CN203004798U (en) | 2013-06-19 |
Family
ID=48596423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320026113 Expired - Fee Related CN203004798U (en) | 2013-01-18 | 2013-01-18 | Teaching aid-compass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203004798U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235420A (en) * | 2015-09-25 | 2016-01-13 | 苏州市职业大学 | Mechanical arm type precise circle-drawing device |
| CN108790503A (en) * | 2018-05-21 | 2018-11-13 | 广州大学 | A kind of scalable teaching aid compasses of digitlization |
| CN110816128A (en) * | 2019-11-20 | 2020-02-21 | 韩登利 | Special drawing device of higher mathematics |
-
2013
- 2013-01-18 CN CN 201320026113 patent/CN203004798U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235420A (en) * | 2015-09-25 | 2016-01-13 | 苏州市职业大学 | Mechanical arm type precise circle-drawing device |
| CN108790503A (en) * | 2018-05-21 | 2018-11-13 | 广州大学 | A kind of scalable teaching aid compasses of digitlization |
| CN108790503B (en) * | 2018-05-21 | 2023-10-20 | 广州大学 | Digital telescopic teaching aid compasses |
| CN110816128A (en) * | 2019-11-20 | 2020-02-21 | 韩登利 | Special drawing device of higher mathematics |
| CN110816128B (en) * | 2019-11-20 | 2023-08-04 | 莱芜职业技术学院 | Drawing device special for higher mathematics |
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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: 20130619 Termination date: 20170118 |