CN201525223U - Multifunctional deltoid plate for blackboard - Google Patents
Multifunctional deltoid plate for blackboard Download PDFInfo
- Publication number
- CN201525223U CN201525223U CN2009202535674U CN200920253567U CN201525223U CN 201525223 U CN201525223 U CN 201525223U CN 2009202535674 U CN2009202535674 U CN 2009202535674U CN 200920253567 U CN200920253567 U CN 200920253567U CN 201525223 U CN201525223 U CN 201525223U
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- CN
- China
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- isosceles right
- right angle
- hypotenuse
- triangle body
- angled
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Abstract
The utility model relates to a multifunctional deltoid plate for a blackboard, comprising an isosceles right-angled deltoid plate body. The internal part of the isosceles right-angled deltoid plate body is provided with a semicircular hollow center (6); the straight line of the semicircular hollow center (6) is arranged on the inclined side of the isosceles right-angled deltoid plate, and the center position of the inclined side is provided with a midpoint (5); the outer side of the curve of the semicircular hollow center (6) is provided with angle measuring scales (3) taking the midpoint (5) as the center of circle and ranging from 0 degree to 180 degrees; the center position of the inclined side of the isosceles right-angled plate body is further provided with a level (4); the inclined side of the isosceles right-angled plate body is further uniformly provided with 2-30 circular holes (1); and the inclined side of the isosceles right-angled plate body is further provided with ruler scales (2). The multifunctional deltoid plate for a blackboard is multifunctional, and has simple operation, convenient carrying and low cost.
Description
Technical field
The utility model relates to a kind of mathematical education drawing instrument technical field, is specifically related to a kind of multi-functional blackboard set square.
Background technology
In the present all kinds of schools, in course teachings such as solid geometry, descriptive geometry, all kinds of drawing, the employed for a long time drawing instrument of teacher all is traditional instrument, i.e. ruler, set square, compasses etc.During drawing, by teacher's range estimation, so just often there are a lot of errors in drawn horizontal line and vertical line entirely, and have also influenced the speed of drawing greatly.If in teaching, adopt the mode of wall chart to solve this problem, just need at the very start an intact wall chart is presented on the classroom student in face of, certainly will will influence or distract the attention of the students, all unfavorable to the training of student's spatial thinking ability and manipulative ability.
The Chinese patent publication number is CN2191104, the utility model specification that open day is March 8 nineteen ninety-five discloses " how much, drawing teaching drawing board ", this utility model is formed by chart board, ram with along the leveling ruler that ram moves up and down, it has solved horizontal reference problem in the drawing link of classroom instruction for numerous teachers, brought convenience for the teaching of solid geometry, plane geometry and all kinds of drawing subjects, advantages such as it has the drawing standard, speed is fast, and is simple in structure, easy to use.But, this utility model more complicated that operates, the often bad grasp of user, in addition, its function ratio is less, can not carry out angulation or draws circle and use.
The utility model content
The purpose of this utility model is at existing teaching drawing instrument function singleness, complicated operation, carries deficiencies such as inconvenience, and a kind of diverse in function, the simple, convenient a kind of multi-functional blackboard set square that carries are provided.
The purpose of this utility model realizes by following technological means: a kind of multi-functional blackboard set square, include isosceles right angle triangle body, it is hollow that the inside of described isosceles right angle triangle body is provided with semicircle, the hollow straight line of semicircle is arranged on the hypotenuse of isosceles right angle triangle body, the middle position of hypotenuse is provided with mid point, and the hollow curve outside of semicircle is provided with the mid point angle measuring calibration of the 0-180 degree that is the center of circle.
The middle position of the hypotenuse of described isosceles right angle triangle body also is provided with level meter.
Also evenly be provided with 2-30 circular hole on the hypotenuse of described isosceles right angle triangle body.
Also be provided with the ruler scale on the hypotenuse of described isosceles right angle triangle body.
Compared with prior art the utlity model has following tangible advantage: this multi-functional blackboard can roll into one traditional protractor function and traditional set square with set square, can judge whether this multi-functional blackboard is in the position of level with the hypotenuse of set square, the difference of drawing big or small circle or circular arcs, the distance of energy cut-off line line segment; This multi-functional blackboard with the set square diverse in function, simple, conveniently carry, with low cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Among the figure, the 1-circular hole, 2-ruler scale, the 3-angle measuring calibration, the 4-level meter, the 5-mid point, the 6-semicircle is hollow.
The specific embodiment
Below in conjunction with the description of drawings and the specific embodiment the utility model is described in further detail:
A kind of multi-functional blackboard set square as shown in Figure 1, include isosceles right angle triangle body, the inside of described isosceles right angle triangle body is provided with semicircle hollow 6, the straight line of semicircle hollow 6 is arranged on the hypotenuse of isosceles right angle triangle body, the middle position of hypotenuse is provided with mid point 5, and it is the angle measuring calibration 3 of the 0-180 degree in the center of circle that the curve outside of semicircle hollow 6 is provided with mid point 5.Be provided with like this, traditional protractor function and traditional set square can be rolled into one, increased function of the present utility model.
The middle position of the hypotenuse of described isosceles right angle triangle body also is provided with level meter 4.Be provided with like this, the teacher can judge according to the indication of droplets in the level meter 4 whether this multi-functional blackboard is in the position of level with the hypotenuse of set square easily and fast when picture is horizontal.
Also evenly be provided with 2-30 circular hole 1 on the hypotenuse of described isosceles right angle triangle body.Be provided with like this, the teacher can distinguish two chalks in two circular holes 1, is the center of circle with a chalk, and another chalk is rotated, and a circle or circular arc can draw; And then by selecting two circular holes 1 of different distance, the circle or the circular arc of different sizes can draw.
Also be provided with ruler scale 2 on the hypotenuse of described isosceles right angle triangle body.Be provided with like this, can be when drawing straight line or amount straight line line segment, clear and definite distance accurately, convenient and practical, increased function of the present utility model.
In a word, the utility model provides a kind of diverse in function, the simple, convenient a kind of multi-functional blackboard set square that carries.
Claims (5)
1. multi-functional blackboard set square, include isosceles right angle triangle body, it is characterized in that: the inside of described isosceles right angle triangle body is provided with semicircle hollow (6), the straight line of semicircle hollow (6) is arranged on the hypotenuse of isosceles right angle triangle body, the middle position of hypotenuse is provided with mid point (5), and it is the angle measuring calibration (3) of the 0-180 degree in the center of circle that the curve outside of semicircle hollow (6) is provided with mid point (5).
2. a kind of multi-functional blackboard set square according to claim 1 is characterized in that: the middle position of the hypotenuse of described isosceles right angle triangle body also is provided with level meter (4).
3. a kind of multi-functional blackboard set square according to claim 1 and 2 is characterized in that: also evenly be provided with 2-30 circular hole (1) on the hypotenuse of described isosceles right angle triangle body.
4. a kind of multi-functional blackboard set square according to claim 1 and 2 is characterized in that: also be provided with ruler scale (2) on the hypotenuse of described isosceles right angle triangle body.
5. a kind of multi-functional blackboard set square according to claim 3 is characterized in that: also be provided with ruler scale (2) on the hypotenuse of described isosceles right angle triangle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202535674U CN201525223U (en) | 2009-11-18 | 2009-11-18 | Multifunctional deltoid plate for blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202535674U CN201525223U (en) | 2009-11-18 | 2009-11-18 | Multifunctional deltoid plate for blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201525223U true CN201525223U (en) | 2010-07-14 |
Family
ID=42516520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202535674U Expired - Fee Related CN201525223U (en) | 2009-11-18 | 2009-11-18 | Multifunctional deltoid plate for blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201525223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103921595A (en) * | 2014-04-24 | 2014-07-16 | 周维保 | Multi-functional isosceles set square |
-
2009
- 2009-11-18 CN CN2009202535674U patent/CN201525223U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103921595A (en) * | 2014-04-24 | 2014-07-16 | 周维保 | Multi-functional isosceles set square |
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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: 20100714 Termination date: 20101118 |