CN204340485U - A kind of set square for teaching - Google Patents
A kind of set square for teaching Download PDFInfo
- Publication number
- CN204340485U CN204340485U CN201420784226.0U CN201420784226U CN204340485U CN 204340485 U CN204340485 U CN 204340485U CN 201420784226 U CN201420784226 U CN 201420784226U CN 204340485 U CN204340485 U CN 204340485U
- Authority
- CN
- China
- Prior art keywords
- main scale
- hole
- rotary knob
- magnet
- degree
- 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 set square for teaching, relate to teaching aid, comprise main scale, chi hole, magnet, through hole and rotary knob; Main scale is isosceles right triangle, chi hole is positioned at main scale inside, chi hole is have an angle to be the right angled triangle of 30 degree, magnet is fixedly connected on main scale front, magnet thickness is less than the half of main scale thickness, and rotary knob is movably connected on main scale, and rotary knob thickness is identical with main scale thickness, through hole through main scale, and is evenly distributed on main scale.The utility model can draw circle, straight line and triangle, and the angle that can draw 15 degree, 30 degree, 45 degree, 60 degree and 90 degree etc. are different, can be adsorbed on blackboard when not using, also can ensure during use that ruler can not arbitrarily movement, cause drawn straight line distortion, picture bowlder also can effectively reduce magnet and have an impact to picture.
Description
Technical field
The utility model relates to teaching aid, is specifically related to a kind of set square for teaching.
Background technology
Mathematics teacher was ruler to the instrument that student's upper class hour is the most frequently used, set square and compasses, and it is very inconvenient to carry these apparatus simultaneously, many teachers are caused above class hour to draw figure conveniently, because figure is irregular, often can affect student and understand classroom knowledge, use multiple types of tools not only to carry trouble simultaneously, the time that drawing tools not only occupies classroom preciousness is often changed in teaching process, and instrument put affect on the table teacher use teaching notes and, the study of math teacher teaching of use instrument to student is facilitated to play very large help, and facilitate teachers ' teaching.
Utility model content
The purpose of this utility model is the defect for above-mentioned prior art, provides a kind of set square for teaching, has structure simple, advantage easy to use.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of set square for teaching, comprises main scale, chi hole, magnet, through hole and rotary knob; Described main scale is isosceles right triangle, it is inner that described chi hole is positioned at described main scale, described chi hole is have an angle to be the right angled triangle of 30 degree, described magnet is fixedly connected on described main scale front, described magnet thickness is less than the half of described main scale thickness, and described rotary knob is movably connected on described main scale, and described rotary knob thickness is identical with described main scale thickness, described through hole through described main scale, and described in be evenly distributed on described main scale.
Preferably, described rotary knob cross section is annular, can ensure that main scale can ensure that described rotary knob can not drop out while rotary knob rotates.
Preferably, described through hole is at least provided with two, and described through hole and described rotary knob are located on the same line, and facilitates teacher to find the through hole can drawing the circle varied in size accurately.
Preferably, described magnet is at least provided with two, rotates when preventing the utility model to be adsorbed on blackboard.
The beneficial effects of the utility model: the utility model can draw circle, straight line and triangle, and the angle that can draw 15 degree, 30 degree, 45 degree, 60 degree and 90 degree etc. are different, can be adsorbed on blackboard when not using, also can ensure during use that ruler can not arbitrarily movement, cause drawn straight line distortion, picture bowlder also can effectively reduce magnet and have an impact to picture.
Accompanying drawing explanation
Fig. 1 is the utility model Facad structure schematic diagram;
Fig. 2 is the utility model structure schematic diagram;
Fig. 3 is the utility model rotary knob cross-sectional view.
In figure, description of reference numerals is as follows: 1, main scale; 2, chi hole; 3, magnet; 4, through hole; 5, rotary knob.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail:
As shown in Figure 1, Figure 2 and Figure 3, a kind of set square for teaching, comprises main scale 1, chi hole 2, magnet 3, through hole 4 and rotary knob 5; Main scale 1 is isosceles right triangle, it is inner that chi hole 2 is positioned at main scale 1, chi hole 2 is the right angled triangle of 30 degree for there being an angle, magnet 3 is fixedly connected on main scale 1 front, magnet 3 thickness is less than the half of main scale 1 thickness, and rotary knob 5 is movably connected on main scale 1, and rotary knob 5 thickness is identical with main scale 1 thickness, through hole 4 through main scale 1, and is evenly distributed on main scale 1.
Rotary knob 5 cross section is annular, can ensure that main scale 1 can ensure that rotary knob 5 can not drop out while rotary knob 5 rotates.
Through hole 4 is at least provided with two, and through hole 4 and rotary knob 5 are located on the same line, and facilitates teacher to find accurately can to draw the through hole 4 of the circle varied in size.
Magnet 3 is at least provided with two, rotates when preventing the utility model to be adsorbed on blackboard.
When the utility model comes into operation, if when teacher needs picture angle or triangle, the angle of main scale 1 can be utilized, the angle in chi hole 2 or main scale 1 and chi hole 2 coordinate, draw the triangle of multiple different angle or different angles, draw straight line, when angle or triangle teacher by the utility model just facing to blackboard, the frictional force of the utility model and blackboard can be increased by the attraction of magnet 3 pairs of blackboards, the line segment drawn is prevented to be distorted, when needs picture is circular, the back side of the present utility model is faced toward blackboard by teacher, pin choosing dress button, by chalk through through hole 4, then main scale 1 is driven to rotate around rotary knob 5 with chalk, the frictional force that magnet 3 increases can be effectively reduced, and the circle of standard can be drawn, can by ruler just facing to blackboard when not using the utility model, the utility model is made to be adsorbed on blackboard, being placed on dais also can not affect teacher uses teaching materials.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technology people of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. a set square for teaching, is characterized in that: comprise main scale, chi hole, magnet, through hole and rotary knob; Described main scale is isosceles right triangle, it is inner that described chi hole is positioned at described main scale, described chi hole is have an angle to be the right angled triangle of 30 degree, described magnet is fixedly connected on described main scale front, described magnet thickness is less than the half of described main scale thickness, and described rotary knob is movably connected on described main scale, and described rotary knob thickness is identical with described main scale thickness, described through hole through described main scale, and described in be evenly distributed on described main scale.
2. set square for teaching according to claim 1, is characterized in that: described rotary knob cross section is annular.
3. set square for teaching according to claim 1, is characterized in that: described through hole is at least provided with two, and described through hole and described rotary knob are located on the same line.
4. set square for teaching according to claim 1, is characterized in that: described magnet is at least provided with two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420784226.0U CN204340485U (en) | 2014-12-11 | 2014-12-11 | A kind of set square for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420784226.0U CN204340485U (en) | 2014-12-11 | 2014-12-11 | A kind of set square for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204340485U true CN204340485U (en) | 2015-05-20 |
Family
ID=53223782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420784226.0U Expired - Fee Related CN204340485U (en) | 2014-12-11 | 2014-12-11 | A kind of set square for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204340485U (en) |
-
2014
- 2014-12-11 CN CN201420784226.0U patent/CN204340485U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20151211 |
|
| EXPY | Termination of patent right or utility model |