CN203937396U - A kind of teaching aid of drawing oval arc angle line - Google Patents
A kind of teaching aid of drawing oval arc angle line Download PDFInfo
- Publication number
- CN203937396U CN203937396U CN201420330280.8U CN201420330280U CN203937396U CN 203937396 U CN203937396 U CN 203937396U CN 201420330280 U CN201420330280 U CN 201420330280U CN 203937396 U CN203937396 U CN 203937396U
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- angle
- handle
- dwang
- square
- draw
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- Expired - Fee Related
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- 230000000694 effects Effects 0.000 abstract description 2
- 230000000875 corresponding Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Abstract
Draw a teaching aid for oval arc angle line, mainly comprise set square body, handle, dwang, chute body, it is characterized in that: handle is connected with hypotenuse and the vertical straight arm of angle of set square body by hand tighten screw, and handle is dismountable; Dwang top indicates radius graduation mark, and lower end is provided with elastic clip; The top of the set square body vertical straight arm of angle indicates angle index line, and bottom is provided with chute body.Beneficial effect is that detachable handle is provided with rubber slide block, cord, slipping ring, can easily draw different sizes oval on blackboard; Dwang indicates radius graduation mark, can easily draw circular arc and the circle of different radii on blackboard; Vertical straight arm of angle the first half is provided with angle index line, can easily draw the angle line of different angles on blackboard.
Description
Technical field
The utility model relates to a kind of mathematics teaching aid, specifically the dismountable set square that can draw ellipse, circular arc, angle line of a kind of handle.
Technical background
At present, teacher is in mathematical education process, often use teaching aid to map on blackboard, can use set square, compasses, protractor teaching aid to draw circle, circular arc, angle line, these teaching aids not only relatively disperse, and can not draw ellipse, if leave behind wherein which teaching aid, will affect lesson teaching.Therefore study a kind of teaching aid with flexible picture ellipse, circular arc, circle, angle line, very necessary.
Technical scheme
The utility model object is to provide a kind of dismountable set square of its handle of drawing ellipse and circular arc, angle line.
Solving the scheme that its technical problem takes is that this teaching aid of drawing ellipse, circular arc, angle line, mainly comprises set square body, handle, dwang, chute body.
Described handle is dismountable handle, two ends are respectively provided with a circular hole, hand tighten screw is fixed on handle in the corresponding screw thread mouth of hypotenuse and right-angle side middle part of set square body by circular hole, handle body is provided with dovetail groove, in dovetail groove, being provided with two larger lower ends of viscous damping is the rubber slide block of dovetail ridge, and the lower end of two rubber slide blocks is dovetail ridge, and rubber slide block is connected with tightrope, tightrope is provided with slipping ring, and slipping ring can insert chalk; When use, take off hand tighten screw, unload handle, left hand is pressed in handle on blackboard, and according to oval definite value principle, the right hand regulates rubber slide position by the chalk in slipping ring, can draw the ellipse of different definite values.
Described set square body upper end is connected with dwang by rotating shaft, vertical straight arm of angle the first half is provided with angle index line, the joining of the vertical straight arm of angle and dwang is in angle index line present position, can determine its folding angle, not only there is the picture angle line function of conventional 30 degree, 45 degree, 60 degree, 90 degree in teaching, can also draw flexibly with reference to angle graduation mark the angle line of different angles.
Described dwang is the compasses dwang of picture bowlder, dwang the first half is provided with the dimension line that represents compasses lower ending opening distance, also be picture circular arc, draw radius of a circle dimension line, in the position of dimension line, can draw circular arc and the circle of different radii with reference to the joining of dwang and the vertical straight arm of angle; Lower end is provided with places the elastic clip that snaps in chalk.
Described chute body is located at set square vertical straight arm of angle bottom, and set square right-angle side bottom and chute body correspondence position are provided with dovetail groove, and chute body bottom is dovetail ridge, and dovetail groove is slidably connected; Chute body top is ∪ shape, and chute body bottom is ∨ shape, stirs chute body downwards, ∨Xing top, bottom is pressed in and on blackboard, can be used as compasses fixing feet, can holding dwang in the ∪ shape groove of chute body top, do not use dwang to draw circle, while drawing circular arc, in order to place and to block dwang lower end.
While implementing the utility model, left hand is held set square upper end, releases chute body as fixing feet, according to the radius graduation mark on dwang, draws very easily circular arc and the circle of relevant radii.
While implementing the utility model, according to the angle index line on the set square vertical straight arm of angle, forward dwang to relevant position, draw the angle line of respective angles.
While implementing the utility model, take off handle, left hand is pressed in handle on blackboard, the right hand oval size adjustment tightrope two ends rubber slide block as required, and the sliding ring that chalk inserts on tightrope can draw corresponding size ellipse.
Beneficial effect is that detachable handle is provided with rubber slide block, cord, slipping ring, can easily draw different sizes oval on blackboard; Dwang indicates radius graduation mark, can easily draw circular arc and the circle of different radii on blackboard; Vertical straight arm of angle the first half is provided with angle index line, can easily draw the angle line of different angles on blackboard.
Brief description of the drawings
Fig. 1 is front elevational schematic of the present utility model.
Fig. 2 is the schematic diagram that the chute body in the utility model amplifies.
Fig. 3 is that the chute body in the utility model is connected profile with the dovetail groove of set square vertical straight arm of angle bottom.
Wherein, 1, set square body, 2, handle, 3, hand tighten screw, 4, rubber slide block, 5, rotating shaft, 6, forward bar to, 7, elastic clip, 8, chute body, 9, flexure strip, 10, locating slot.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 shows, this teaching aid of drawing ellipse, circular arc, angle line provided by the utility model, mainly comprises set square body 1, handle 2, dwang 6, chute body 8.
Handle 2 is dismountable, two ends are respectively provided with a circular hole, hand tighten screw 3 is fixed in by circular hole in the corresponding screw thread mouth of hypotenuse and vertical straight arm of angle middle part of set square body 1, handle 2 bodies are provided with dovetail groove, in dovetail groove, being provided with the lower end that two larger lower ends of viscous damping are 4, two rubber slide blocks 4 of rubber slide block of dovetail ridge is dovetail ridge, and rubber slide block 4 is connected with tightrope, tightrope is provided with slipping ring, and slipping ring can insert chalk; When use, take off hand tighten screw 3, unload handle 2, left hand is pressed in handle 2 on blackboard, and according to oval definite value principle, the right hand regulates rubber slide block 4 positions, by the chalk in slipping ring, can draw the ellipse of different definite values.
Described set square body upper end is connected with dwang 6 by rotating shaft 5, vertical straight arm of angle the first half is provided with angle index line, the joining of the vertical straight arm of angle and dwang is in angle index line present position, can determine its folding angle, not only there is the picture angle line function of conventional 30 degree, 45 degree, 60 degree, 90 degree in teaching, can also draw flexibly with reference to angle graduation mark the angle line of different angles.
The compasses dwang that described dwang 6 is picture bowlders, dwang 5 the first half are provided with the dimension line that represents compasses lower ending opening distance, also be picture circular arc, picture radius of a circle dimension line, in the position of dimension line, can draw circular arc and the circle of different radii with reference to the joining of dwang 6 and the vertical straight arm of angle; Lower end is provided with places the elastic clip 7 that snaps in chalk.
Described chute body 8 is located at set square vertical straight arm of angle bottom, and set square right-angle side bottom and chute body 8 correspondence positions are provided with dovetail groove, and chute body bottom is dovetail ridge, and dovetail groove is slidably connected; Chute body 8 tops are ∪ shape, chute body 8 bottoms are ∨ shape, stir chute body 8 downwards, flexure strip 9 lower ends snap in locating slot 10, position after transfering in order to fixing chute body 8, ∨Xing top, bottom is pressed in and on blackboard, can be used as compasses fixing feet, can holding dwang 6 in chute body 8 top ∪ shape grooves, while not using dwang 6 to draw circle, circular arc, in order to place and to block dwang 6 lower ends.
Fig. 2 is shape and the connection for better explanation chute body 8 and flexure strip 9, the enlarged diagram providing, wherein flexure strip 9 upper ends are fixed on set square vertical straight arm of angle bottom, and chute body 8 is stirred downwards, locating slot 10 is blocked in flexure strip 9 lower ends, has fixed the position after chute body 8 is transferred to.
Fig. 3 is that chute body 8 is connected profile with the dovetail groove of set square vertical straight arm of angle bottom, and wherein set square body 1 vertical straight arm of angle bottom is provided with dovetail groove, and chute body 8 bottoms are provided with dovetail ridge, and dovetail groove and dovetail ridge are slidably connected.
Claims (1)
1. the teaching aid that can draw oval arc angle line, is characterized in that: handle (2) is connected with hypotenuse and the vertical straight arm of angle of set square body by hand tighten screw (3), and handle (2) is dismountable; Dwang (6) top indicates radius graduation mark, and lower end is provided with elastic clip (7); The top of the set square body vertical straight arm of angle indicates angle index line, and bottom is provided with chute body (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330280.8U CN203937396U (en) | 2014-06-13 | 2014-06-13 | A kind of teaching aid of drawing oval arc angle line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330280.8U CN203937396U (en) | 2014-06-13 | 2014-06-13 | A kind of teaching aid of drawing oval arc angle line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203937396U true CN203937396U (en) | 2014-11-12 |
Family
ID=51856740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420330280.8U Expired - Fee Related CN203937396U (en) | 2014-06-13 | 2014-06-13 | A kind of teaching aid of drawing oval arc angle line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203937396U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085231A (en) * | 2014-06-13 | 2014-10-08 | 胡健强 | Training aid capable of drawing elliptical arc angle line |
-
2014
- 2014-06-13 CN CN201420330280.8U patent/CN203937396U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085231A (en) * | 2014-06-13 | 2014-10-08 | 胡健强 | Training aid capable of drawing elliptical arc angle line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20170613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |