CN202923220U - Novel compasses - Google Patents
Novel compasses Download PDFInfo
- Publication number
- CN202923220U CN202923220U CN 201220640442 CN201220640442U CN202923220U CN 202923220 U CN202923220 U CN 202923220U CN 201220640442 CN201220640442 CN 201220640442 CN 201220640442 U CN201220640442 U CN 201220640442U CN 202923220 U CN202923220 U CN 202923220U
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- CN
- China
- Prior art keywords
- arm
- utility
- support arm
- novel compasses
- model
- 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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- Electrically Operated Instructional Devices (AREA)
Abstract
The utility model discloses a pair of novel compasses and belongs to the technical field of mathematical teaching aids. The utility model adopts the following technical scheme: the novel compasses comprise a handle, a rotary shaft, a positioning arm, an arc ruler and a drawing arm, and is characterized in that a support arm is arranged on the rotary shaft, and a propelling pencil is fixedly arranged on the support arm. The novel compasses are simple in structure, can be used for drawing a circle on a blackboard or paper in the mathematical teaching process, are simple to operate and relieve the working difficulty of a teacher.
Description
Technical field: the utility model belongs to the teaching apparatus for mathematics technical field, is a kind of novel bow compass specifically.
Background technology: at present, generally justify with compasses in the mathematical education process, justify but define on blackboard in use, also need chalk is changed if make bowlder on page, operating so extremely bothers, wastes time and energy, and has increased work difficulty to the teacher.
Summary of the invention: the purpose of this utility model is to provide a kind of novel bow compass that can facilitate the plate face to make circle and paper work circle in the mathematical education process.
The technical solution of the utility model is: comprise squeezing handle, rotating shaft, registration arm, arc chi and draw arm, it is characterized in that being provided with support arm in rotating shaft, being fixed with propelling pencil on support arm.
The beneficial effects of the utility model are: the utility model is simple in structure, can facilitate plate face work circle and paper to justify in the mathematical education process, and is easy and simple to handle, alleviated teacher's work difficulty.
Description of drawings: accompanying drawing 1 is structural representation of the present utility model.
In figure 1, squeezing handle, 2, rotating shaft, 3, registration arm, 4, the arc chi, 5, draw arm, 6, support arm, 7, propelling pencil.
The specific embodiment: comprise squeezing handle 1, rotating shaft 2, registration arm 3, arc chi 4 and draw arm 5, it is characterized in that being provided with support arm 6 in rotating shaft 2, being fixed with propelling pencil 7 on support arm 6.The picture arm 5 of in advance chalk being packed in the mathematical education process is interior fixing, selects picture arm 5 or propelling pencil 7 to draw according to the drawing needs and gets final product.
Claims (1)
1. novel bow compass, comprise squeezing handle (1), rotating shaft (2), registration arm (3), arc chi (4) and draw arm (5), it is characterized in that: be provided with support arm (6) in rotating shaft (2), be fixed with propelling pencil (7) on support arm (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220640442 CN202923220U (en) | 2012-11-15 | 2012-11-15 | Novel compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220640442 CN202923220U (en) | 2012-11-15 | 2012-11-15 | Novel compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202923220U true CN202923220U (en) | 2013-05-08 |
Family
ID=48213214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220640442 Expired - Fee Related CN202923220U (en) | 2012-11-15 | 2012-11-15 | Novel compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202923220U (en) |
-
2012
- 2012-11-15 CN CN 201220640442 patent/CN202923220U/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: 20130508 Termination date: 20131115 |