CN204020326U - A kind of compass for math teaching - Google Patents
A kind of compass for math teaching Download PDFInfo
- Publication number
- CN204020326U CN204020326U CN201420423227.2U CN201420423227U CN204020326U CN 204020326 U CN204020326 U CN 204020326U CN 201420423227 U CN201420423227 U CN 201420423227U CN 204020326 U CN204020326 U CN 204020326U
- Authority
- CN
- China
- Prior art keywords
- chalk
- rotating shaft
- bull stick
- blackboard
- ledge
- 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 kind of study article, particularly disclose a kind of compass for math teaching.This kind of compass for math teaching, comprises sucker, bull stick, chalk clamp, it is characterized in that: sucker is provided with and is fixedly connected with button, be fixedly connected with to buckle and sequentially rotating shaft, rotating shaft tightness-adjustable button be housed from the inside to the outside, rotating shaft upper end connects is equipped with bull stick, bull stick is provided with radius ruler, bull stick one end is provided with chalk clamp, has ledge for chalk on blackboard in the middle part of chalk clamp, and ledge for chalk on blackboard side is provided with the tight stopper of chalk, the tight stopper of chalk connects chalk degree of tightness adjusting knob, and ledge for chalk on blackboard opposite side is provided with chalk clamp clip.Its beneficial effect is: structure is simple, easy to use, teacher can be helped fast to draw the circle of teaching required size, and exclusive design makes teacher use the speed that can regulate picture circle according to individual use habit, can make the clear standard of circle drawn, also can not fracture chalk.
Description
Technical field
The utility model relates to a kind of study article, particularly a kind of compass for math teaching.
Background technology
Mathematics teacher often uses compasses at teaching geometry and carries out picture circle, existing compasses for teaching is still than the compasses combined with ruler of larger proportion, very inconvenient when blackboard upper drawing circle, picture circular velocity is slow, also frangibility chalk, the teaching of teacher can not be carried out fast and effectively, bring many inconvenience to the teaching of teacher.
Summary of the invention
The utility model, in order to make up the defect of prior art, provides a kind of a kind of compass for math teaching that teacher can be facilitated to use.
The utility model is achieved by the following technical solution:
A kind of compass for math teaching, comprises sucker, bull stick, chalk clamp, it is characterized in that: sucker is provided with and is fixedly connected with button, be fixedly connected with to buckle and sequentially rotating shaft, rotating shaft tightness-adjustable button be housed from the inside to the outside, rotating shaft upper end connects is equipped with bull stick, bull stick is provided with radius ruler, bull stick one end is provided with chalk clamp, has ledge for chalk on blackboard in the middle part of chalk clamp, and ledge for chalk on blackboard side is provided with the tight stopper of chalk, the tight stopper of chalk connects chalk degree of tightness adjusting knob, and ledge for chalk on blackboard opposite side is provided with chalk clamp clip.
Concrete, described rotating shaft is the metallic rod be made up of stainless steel metal, and its anglec of rotation is 360 degree, is provided with rotating shaft tightness-adjustable button outside rotating shaft, and rotating shaft tightness-adjustable button is arranged on to be fixedly connected with and buckles.
Concrete, described sucker diameter is 5 centimetres, and bull stick length is 60 centimetres.
The beneficial effects of the utility model are: structure is simple, easy to use, teacher can be helped fast to draw the circle of teaching required size, and exclusive design makes teacher use the speed that can regulate picture circle according to individual use habit, can make the clear standard of circle drawn, also can not fracture chalk.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing 1 is the structure chart of a kind of compass for math teaching of the utility model;
In figure, 1 sucker, 2 are fixedly connected with button, 3 rotating shaft tightness-adjustable buttons, 4 bull sticks, 5 radius rulers, 6 rotating shafts, 7 chalk clamp, 8 ledges for chalk on blackboard, 9 chalk clamp clips, the tight stopper of 10 chalk, 11 chalk degree of tightness adjusting knobs.
Detailed description of the invention
Accompanying drawing 1 is a kind of specific embodiment of the present utility model.A kind of compass for math teaching of this utility model, comprise sucker 1, bull stick 4, chalk clamp 7, it is characterized in that: sucker 1 is provided with and is fixedly connected with button 2, be fixedly connected with on button 2 and sequentially rotating shaft 6, rotating shaft tightness-adjustable button 3 be housed from the inside to the outside, rotating shaft 6 upper end connects is equipped with bull stick 4, bull stick 4 is provided with radius ruler 5, bull stick 4 one end is provided with chalk clamp 7, has ledge for chalk on blackboard 8 in the middle part of chalk clamp 7, and ledge for chalk on blackboard 8 side is provided with the tight stopper 10 of chalk, the tight stopper 10 of chalk connects chalk degree of tightness adjusting knob 11, and ledge for chalk on blackboard 8 opposite side is provided with chalk clamp clip 9.
Concrete, described rotating shaft 6 is the metallic rod be made up of stainless steel metal, and its anglec of rotation is 360 degree, is provided with rotating shaft tightness-adjustable button 3 outside rotating shaft 6, and rotating shaft tightness-adjustable button 3 is arranged on and is fixedly connected with on button 2.
Concrete, described sucker 1 diameter is 5 centimetres, and bull stick 4 length is 60 centimetres.
A kind of compass for math teaching of this utility model, before using, chalk is loaded in the ledge for chalk on blackboard 8 in chalk clamp 7, chalk degree of tightness adjusting knob 11 is used firmly to be fixed in ledge for chalk on blackboard 8 by the tight stopper 10 of chalk by chalk, then the position of chalk clamp 7 is regulated, distance scale on concrete radius reference radius scale 5, after choosing position, chalk clamp clip 9 is used to be fixed on bull stick 4 by chalk clamp 7, then sucker 1 is adsorbed on blackboard smooth surface place, bull stick 4 is selected after sucker 1 is fixing, bull stick drives chalk clamp 7 to rotate, draw standard circular, speed due to axis of rotation directly has influence on the definition of drawing with coloured chalk circle, the personal habits dynamics that rotating shaft tightness-adjustable button 3 can draw bowlder according to teacher carries out adjusting rotary speed, make each teacher in use can with oneself optimum speed and strength to control the dynamics of drawing with coloured chalk bowlder, thus ensure that the circle drawn is clear, full and be unlikely to overexertion and break chalk.
The utility model is not limited to above-mentioned embodiment, anyone should learn make under enlightenment of the present utility model with the utility model, there is identical or close technical scheme, all fall within protection domain of the present utility model.
Technology, shape, structure part that the utility model is not described in detail are known technology.
Claims (3)
1. a compass for math teaching, comprises sucker, bull stick, chalk clamp, it is characterized in that: sucker is provided with and is fixedly connected with button, be fixedly connected with to buckle and sequentially rotating shaft, rotating shaft tightness-adjustable button be housed from the inside to the outside, rotating shaft upper end connects is equipped with bull stick, bull stick is provided with radius ruler, bull stick one end is provided with chalk clamp, has ledge for chalk on blackboard in the middle part of chalk clamp, and ledge for chalk on blackboard side is provided with the tight stopper of chalk, the tight stopper of chalk connects chalk degree of tightness adjusting knob, and ledge for chalk on blackboard opposite side is provided with chalk clamp clip.
2. a kind of compass for math teaching according to claim 1, it is characterized in that: described rotating shaft is the metallic rod be made up of stainless steel metal, its anglec of rotation is 360 degree, is provided with rotating shaft tightness-adjustable button outside rotating shaft, and rotating shaft tightness-adjustable button is arranged on to be fixedly connected with and buckles.
3. a kind of compass for math teaching according to claim 1, is characterized in that: described sucker diameter is 5 centimetres, and bull stick length is 60 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420423227.2U CN204020326U (en) | 2014-07-30 | 2014-07-30 | A kind of compass for math teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420423227.2U CN204020326U (en) | 2014-07-30 | 2014-07-30 | A kind of compass for math teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204020326U true CN204020326U (en) | 2014-12-17 |
Family
ID=52060232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420423227.2U Expired - Fee Related CN204020326U (en) | 2014-07-30 | 2014-07-30 | A kind of compass for math teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204020326U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109367293A (en) * | 2018-10-23 | 2019-02-22 | 张艺璇 | A kind of modified compasses |
-
2014
- 2014-07-30 CN CN201420423227.2U patent/CN204020326U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109367293A (en) * | 2018-10-23 | 2019-02-22 | 张艺璇 | A kind of modified compasses |
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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 |
Granted publication date: 20141217 Termination date: 20150730 |
|
| EXPY | Termination of patent right or utility model |