CN203078072U - Compasses for teaching - Google Patents
Compasses for teaching Download PDFInfo
- Publication number
- CN203078072U CN203078072U CN 201220757289 CN201220757289U CN203078072U CN 203078072 U CN203078072 U CN 203078072U CN 201220757289 CN201220757289 CN 201220757289 CN 201220757289 U CN201220757289 U CN 201220757289U CN 203078072 U CN203078072 U CN 203078072U
- Authority
- CN
- China
- Prior art keywords
- teaching
- compasses
- chalk
- movable arm
- utility
- 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 compasses for teaching. The compasses for the teaching comprise a fixing shaft and a movable arm. The compasses for the teaching are characterized in that the movable arm is of a slide rule structure and is located through a fixing clip, one end of the movable arm is connected with the fixing shaft, and the other end of the movable arm is of a chalk clamp structure. When the teaching is carried out, a slide rule is adjusted to select the radius of a drawn circle, a teacher does not need to determine the radius by the aid of a straight rule, a chalk is directly fixed on the compasses through a clamp, and accuracy is better than accuracy of a traditional way that a hand is used for fixing a chalk to draw a circle. The compasses for the teaching are simple in structure and convenient to operate, and bring convenience for the teaching.
Description
Technical field
The utility model relates to the teaching aid field, a kind of compasses for teaching of specific design.
Background technology
Compasses be how much teachings must use teaching aid, but traditional compasses only are applicable to general paper, serve as a teacher in the time of need demonstrating in the classroom, often are difficult to play a role, and perhaps also need finish by other teaching aids such as rulers, are not easy to use.
The utility model content
For more convenient teaching, the utility model has designed a kind of novel compasses for teaching, comprises fixed axis, lever arm is characterized in that lever arm is a slide rule structure, and by fixedly sticking into the row location, one end is connected with fixed axis, and the other end is a chalk yoke configurations.Can select drawn radius of a circle by regulating slide rule during teaching, determine radius without the teacher by means of ruler, and chalk directly is fixed on the compasses by clip, fixedly the drawing with coloured chalk accuracy of justifying is good than former useful hand.
Wherein said compasses for teaching is if be used for normal blackboard, and then described fixed axis polycrystalline substance is the gusseted shelf structure, guarantees the stability of fixed axis.
Wherein said compasses for teaching is if be used for magnet board, and then described fixed axis bottom can be the paster with magnetic, and direct like this and magnet board adsorbs, and fixes.
Compasses for teaching of the present utility model, simple in structure, be convenient to operation, for teaching offers convenience.
Description of drawings
Fig. 1 is the structural representation according to the compasses for teaching of the utility model embodiment.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is done into to describe in detail.Following examples are used to illustrate the utility model, but are not used for limiting scope of the present utility model.
As described in Figure 1, the utility model provides a kind of compasses for teaching, comprises fixed axis 1, and lever arm 2, lever arm 2 are slide rule structures, and positions by fixing card 3, and an end is connected with fixed axis, and the other end is chalk clip 4 structures.
The fixed axis bottom of wherein said compasses for teaching can be a triangular support bracket, also can be the paster with magnetic.
Can select drawn radius of a circle by regulating slide rule during teaching, determine radius without the teacher by means of ruler, and chalk directly is fixed on the compasses by clip, fixedly the drawing with coloured chalk accuracy of justifying is good than former useful hand.
Compasses for teaching of the present utility model, simple in structure, be convenient to operation, for teaching offers convenience.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (3)
1. a compasses for teaching comprises fixed axis (1), and lever arm (2) is characterized in that lever arm (2) is a slide rule structure, and positions by fixing card (3), and an end is connected with fixed axis, and the other end is a chalk clip (a 4) structure.
2. compasses for teaching as claimed in claim 1 is characterized in that, described fixed axis (1) bottom is a triangular support bracket.
3. compasses for teaching as claimed in claim 1 or 2 is characterized in that, described fixed axis (1) bottom is the paster with magnetic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220757289 CN203078072U (en) | 2012-12-31 | 2012-12-31 | Compasses for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220757289 CN203078072U (en) | 2012-12-31 | 2012-12-31 | Compasses for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203078072U true CN203078072U (en) | 2013-07-24 |
Family
ID=48823940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220757289 Expired - Fee Related CN203078072U (en) | 2012-12-31 | 2012-12-31 | Compasses for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203078072U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985956A (en) * | 2015-07-03 | 2015-10-21 | 河南科技大学 | Storable tool used for drawing great circles through self-chosen pen |
-
2012
- 2012-12-31 CN CN 201220757289 patent/CN203078072U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985956A (en) * | 2015-07-03 | 2015-10-21 | 河南科技大学 | Storable tool used for drawing great circles through self-chosen pen |
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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: 20130724 Termination date: 20131231 |