CN202403631U - Bidirectional readable protractor - Google Patents
Bidirectional readable protractor Download PDFInfo
- Publication number
- CN202403631U CN202403631U CN2011205615324U CN201120561532U CN202403631U CN 202403631 U CN202403631 U CN 202403631U CN 2011205615324 U CN2011205615324 U CN 2011205615324U CN 201120561532 U CN201120561532 U CN 201120561532U CN 202403631 U CN202403631 U CN 202403631U
- Authority
- CN
- China
- Prior art keywords
- protractor
- interior
- readable
- bidirectional
- formula weight
- 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 provides a bidirectional readable protractor, belonging to the field of stationery. The bidirectional readable protractor comprises an outer protractor and an inner protractor. The inner parts of the inner protractor and the outer protractor are hollowed and are embedded with each other. The centers of circles and diameters of the inner protractor and the outer protractor are superposed. A rotary rod is connected to the centre of a diameter edge through a rotary shaft. The other end of the rotary rod is provided with a pointer. Compared with the prior art, the bidirectional readable protractor has the advantages of reasonable design, simple structure, convenience in use and the like and is applied in a wide range.
Description
Technical field
The utility model relates to a kind of schooling apparatus, a kind of specifically readable formula weight hornwork simple in structure, two-way.
Background technology
Protractor is student and teacher all indispensable study and teaching aid; Its main function is to be used for taking measurement of an angle; After the student had learnt the number of degrees method of angulation, the student tended to occur become the number of degrees amount of acute angle the number of degrees at corresponding obtuse angle when the number of degrees of angulation; The obtuse angle amount has become the number of degrees of corresponding acute angle, and the number of degrees that just measure and the actual number of degrees and be 180 ° mainly are that the protractor that the teacher demonstrates in teaching exists significant limitation to cause.Thereby the protractor that designs a kind of reading directly perceived is necessary.
Summary of the invention
The technical assignment of the utility model is the deficiency that solves prior art, and a kind of readable formula weight hornwork simple in structure, two-way is provided.
The technical scheme of the utility model realizes by following mode:
Two-way readable formula weight hornwork; Its structure comprises outer protractor, interior protractor; Said outer protractor, the inner hollow out of interior protractor and chimeric each other; The center of circle and the diameter limit of being somebody's turn to do outer protractor, interior protractor all overlap, and are connected with bull stick in the center on diameter limit through rotating shaft, and the other end of said bull stick is provided with pointer.
Said diameter limit is divided into left zero graduation line, right zero scale mark by the center of circle.
The angle index of protractor, outer protractor is reverse each other in said.
The protractor surface is provided with coarse line in said.
The beneficial effect that the utility model is compared with prior art produced is:
Characteristics such as that the two-way readable formula weight hornwork of the utility model has is simple in structure, easy to use, be skillfully constructed, fixation are designed with two-way readable protractor, make things convenient for the student intuitively to read the reading at angle, and quality of instruction is high, is easy to promote the use of.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model.
Mark in the accompanying drawing is represented respectively:
1, outer protractor, 2, interior protractor, 3, pointer, 4, bull stick, 5, rotating shaft, 6, the zero graduation line.
Embodiment
Below in conjunction with accompanying drawing the two-way readable formula weight hornwork of the utility model is done following the detailed description.
Shown in accompanying drawing 1; This two-way readable formula weight hornwork; Its structure comprises outer protractor 1, interior protractor 2, said outer protractor 1, interior protractor 2 inner hollow outs and chimeric each other, and the center of circle and the diameter limit of outer protractor 1, interior protractor 2 all overlap; Center on the diameter limit is connected with bull stick 4 through rotating shaft 5, and the other end of said bull stick 4 is provided with pointer 3.
Said diameter limit is divided into left scale line, right scale mark by the center of circle; The angle index of protractor 2, outer protractor 1 is reverse each other in said; In actual design, can interior protractor 2 surfaces be provided with coarse line, protractor 2 readings in so just can making things convenient for.
When using this protractor measuring angle, at first the summit of the centre point alignment angle of protractor; Overlap the one side at angle with zero graduation line 6; If what overlap is the zero graduation line 6 of interior protractor 2, just rotate bull stick 4, bull stick 4 is overlapped with another limit at angle, see interior protractor 2 number of degrees of pointer 3 indications again, be exactly the number of degrees at this angle; If what overlap is the zero graduation line 6 of outer protractor 1, outer protractor 1 number of degrees of pointer 3 indications are exactly the number of degrees at this angle.Like this, the demonstration of the number of degrees through measuring several angles, students' union comprehends the method for the number of degrees of angulation soon.
Claims (4)
1. two-way readable formula weight hornwork; Comprise outer protractor, interior protractor; It is characterized in that, said outer protractor, the inner hollow out of interior protractor and chimeric each other, the center of circle and the diameter limit of this outer protractor, interior protractor all overlap; Center on the diameter limit is connected with bull stick through rotating shaft, and the other end of said bull stick is provided with pointer.
2. two-way readable formula weight hornwork according to claim 1 is characterized in that said diameter limit is divided into left zero graduation line, right zero scale mark by the center of circle.
3. two-way readable formula weight hornwork according to claim 1 is characterized in that, the angle index of said interior protractor, outer protractor is reverse each other.
4. two-way readable formula weight hornwork according to claim 1 is characterized in that, said interior protractor surface is provided with coarse line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205615324U CN202403631U (en) | 2011-12-29 | 2011-12-29 | Bidirectional readable protractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205615324U CN202403631U (en) | 2011-12-29 | 2011-12-29 | Bidirectional readable protractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202403631U true CN202403631U (en) | 2012-08-29 |
Family
ID=46701273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205615324U Expired - Fee Related CN202403631U (en) | 2011-12-29 | 2011-12-29 | Bidirectional readable protractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202403631U (en) |
-
2011
- 2011-12-29 CN CN2011205615324U patent/CN202403631U/en not_active Expired - Fee Related
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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: 20120829 Termination date: 20121229 |