CN203974324U - Compass for math teaching - Google Patents
Compass for math teaching Download PDFInfo
- Publication number
- CN203974324U CN203974324U CN201420427641.0U CN201420427641U CN203974324U CN 203974324 U CN203974324 U CN 203974324U CN 201420427641 U CN201420427641 U CN 201420427641U CN 203974324 U CN203974324 U CN 203974324U
- Authority
- CN
- China
- Prior art keywords
- bull stick
- axillare
- circular
- center
- eccentric
- 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
A kind of compass for math teaching, belongs to educational aid field, and the compasses that solved current teaching use can not be drawn round problem at blackboard higher position, and it comprises eccentric shaft, housing, handle, rotary handle, sucker and pen container; Described eccentric shaft comprises circular axillare, center bull stick and eccentric bull stick, the circular outer of axillare and the interior edge of housing are rotationally connected, the outer of housing is fixedly connected with handle, lower surface center at circular axillare is provided with center bull stick, the upper surface place of keeping to the side at circular axillare is provided with eccentric bull stick, lower end at center bull stick is provided with sucker, sucker and center bull stick are rotationally connected, upper end and the rotary handle of eccentric bull stick are rotationally connected, and are provided with multiple pen containers at the lower surface of circular axillare.The utility model is for picture circle.
Description
Technical field
The utility model belongs to educational aid field, is specifically related to a kind of compass for math teaching.
Background technology
The height of blackboard will exceed people's height, because it is almost vertical with blackboard to draw bowlder compasses, so the compasses that teaching is used are at present subject to people's height restriction not draw circle at blackboard higher position.
Summary of the invention
The purpose of this utility model is the problem that the compasses in order to solve current teaching use can not be drawn at blackboard higher position circle, and a kind of compass for math teaching is provided, and its technical scheme is as follows:
A kind of compass for math teaching, it comprises eccentric shaft, housing, handle, rotary handle, sucker and pen container; Described eccentric shaft comprises circular axillare, center bull stick and eccentric bull stick, the circular outer of axillare and the interior edge of housing are rotationally connected, the outer of housing is fixedly connected with handle, lower surface center at circular axillare is provided with center bull stick, the upper surface place of keeping to the side at circular axillare is provided with eccentric bull stick, lower end at center bull stick is provided with sucker, sucker and center bull stick are rotationally connected, upper end and the rotary handle of eccentric bull stick are rotationally connected, and are provided with multiple pen containers at the lower surface of circular axillare.
The beneficial effects of the utility model are: can draw circle at blackboard higher position, in a pen container, put into chalk, and a hand-held firmly handle, the circle centre position that sucker is put into drawn circle is pinned, and another holds rotary handle rotation eccentric axis and draws circle.
brief description of the drawings:
Fig. 1 is upper structure schematic diagram of the present utility model;
Fig. 2 is lower structure schematic diagram of the present utility model;
Fig. 3 is the cross-sectional schematic of pen container in the utility model.
detailed description of the invention:
With reference to Fig. 1, Fig. 2 and Fig. 3, a kind of compass for math teaching, it comprises eccentric shaft 1, housing 2, handle 3, rotary handle 4, sucker 5 and pen container 6, described eccentric shaft 1 comprises circular axillare 1-1, center bull stick 1-2 and eccentric bull stick 1-3, the outer of circular axillare 1-1 and the interior edge of housing 2 are rotationally connected, the outer of housing 2 is fixedly connected with handle 3, be provided with center bull stick 1-2 in the lower surface center of circular axillare 1-1, be provided with eccentric bull stick 1-3 at the upper surface place of keeping to the side of circular axillare 1-1, lower end at center bull stick 1-2 is provided with sucker 5, sucker 5 is rotationally connected with center bull stick 1-2, upper end and the rotary handle 4 of eccentric bull stick 1-3 are rotationally connected, be provided with multiple pen containers 6 at the lower surface of circular axillare 1-1.
In order to make pen container 6 can effectively clamp chalk, in pen container 6, be provided with nylon brush hair 6-1, in order to make the more effective circle that draws of chalk energy, be provided with spring 6-2 in pen container 6 bottoms.
Preferably, axillare 1-1 is transparent configuration, conveniently sees the position in the center of circle.
Claims (4)
1. a compass for math teaching, is characterized in that it comprises eccentric shaft (1), housing (2), handle (3), rotary handle (4), sucker (5) and pen container (6), described eccentric shaft (1) comprises circular axillare (1-1), center bull stick (1-2) and eccentric bull stick (1-3), the outer of circular axillare (1-1) and the interior edge of housing (2) are rotationally connected, the outer of housing (2) is fixedly connected with handle (3), be provided with center bull stick (1-2) in the lower surface center of circular axillare (1-1), be provided with eccentric bull stick (1-3) at the upper surface place of keeping to the side of circular axillare (1-1), be provided with sucker (5) in the lower end of center bull stick (1-2), sucker (5) is rotationally connected with center bull stick (1-2), upper end and the rotary handle (4) of eccentric bull stick (1-3) are rotationally connected, be provided with multiple pen containers (6) at the lower surface of circular axillare (1-1).
2. a kind of compass for math teaching as claimed in claim 1, is characterized in that being provided with nylon brush hair (6-1) in pen container (6).
3. a kind of compass for math teaching as claimed in claim 1, is characterized in that being provided with spring (6-2) in pen container (6) bottom.
4. a kind of compass for math teaching as claimed in claim 1, is characterized in that axillare (1-1) is transparent configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420427641.0U CN203974324U (en) | 2014-07-31 | 2014-07-31 | Compass for math teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420427641.0U CN203974324U (en) | 2014-07-31 | 2014-07-31 | Compass for math teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203974324U true CN203974324U (en) | 2014-12-03 |
Family
ID=51971806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420427641.0U Expired - Fee Related CN203974324U (en) | 2014-07-31 | 2014-07-31 | Compass for math teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203974324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113103809A (en) * | 2021-05-25 | 2021-07-13 | 哈尔滨学院 | Ruler device for drawing |
-
2014
- 2014-07-31 CN CN201420427641.0U patent/CN203974324U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113103809A (en) * | 2021-05-25 | 2021-07-13 | 哈尔滨学院 | Ruler device for drawing |
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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: 20141203 Termination date: 20190731 |