CN202703025U - Secure and convenient mathematics board - Google Patents
Secure and convenient mathematics board Download PDFInfo
- Publication number
- CN202703025U CN202703025U CN 201220099647 CN201220099647U CN202703025U CN 202703025 U CN202703025 U CN 202703025U CN 201220099647 CN201220099647 CN 201220099647 CN 201220099647 U CN201220099647 U CN 201220099647U CN 202703025 U CN202703025 U CN 202703025U
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- China
- Prior art keywords
- ruler
- edge
- millimeters
- base plate
- base board
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- 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
A secure and convenient mathematics board comprises a transparent plastic base board. A long-stripped step which is 2 millimeters * 2 millimeters in size is respectively arranged at positions which are 2 millimeters away from an upper edge and a lower edge and at the back face of the base board, An arc-shaped step which is 2 millimeters * 2 millimeters in size is arranged at a position which is 2 millimeters away from the top edge of a sector and at the back face of a protractor, edges of all graphics on the base board do not contact a paper surface, and a non-contact space exists. An upper edge, a lower edge and a left edge of the base board are provided with rulers (4, 5 and 6) in an engraving mode, zero points of the ruler (5) at the lower edge and the ruler (6) at the left edge are identical, and a zero point of the ruler (4) at the upper edge coincides with a terminal point of the ruler (6) at the left edge. Bottom edges of a right triangle (7), a parallelogram (8), a trapezium (9), a square (10) and a rectangle (11) are aligned to degree scales of the ruler (5), and a perpendicular edge of the right triangle (7) is aligned to degree scales of the ruler (6). Other graphics on the base board are marked with symmetric lines in the centers, and a groove which is 2 millimeters long is respectively arranged at the bottom edge of the protractor and a position half of the radius. The secure and convenient mathematics board can be used to rapidly draw various graphics, and the situation that ink pollutes drawn lines is avoided.
Description
Technical field:
The utility model relates to the junior middle school, the grade teacher prepare lessons, give lessons, the architecture advances of student's used drawing board in operation, belong to the cultural goods technical field of structures.
Background technology:
At present, pupil, junior school student will draw many figures when learning mathematics, must be equipped with the drawing instrument of ruler, set square, protractor and so on, these drawing instrument function singlenesses.Existing middle school Geometric figure drawing plate is generally for the high school student, though its function is complete, because design defect, it is not convenient to use, when ruling by the arris of all figures in the template, normal owing to ink too much on the bow pen and arris generation siphonage, trajectory is produced pollute, impact line quality.
Summary of the invention:
The utility model discloses a kind of relieved convenient mathematical board, has overcome existing mathematics (or how much) template marking and has easily polluted, and uses not easily shortcoming.
Embodiment:
Technical solution of the present utility model is:
1. at the reverse side of base plate, upper edge, the inside 2mm of lower arris place arranges the rectangular step of 2*2mm, and the inside 2mm of the reverse side covering of the fan top arris place of protractor arranges the lonely shape 2cm of 2*2mm bucket step.The arris of all figures does not contact with paper on the base plate, and leaves the noncontact space, during line, even the arris ink of figure is too much on the base plate, does not worry that meeting produces siphonage and pollutes trajectory yet.
2. 3 on the summit of the following left end of the zero point of the zero point of lower edge ruler (5) scale, left margin ruler (6) scale and base plate overlaps and is that a bit (A), the terminal point of the zero point of upper edge ruler (4) scale, left margin ruler (6) scale overlap with 3 on the summit of base plate top left end and is a bit (B).Like this, when drawing any right angle figure (square, rectangle, right angled triangle, right-angled trapezium), as long as put the position that to draw shape well, once can mark two lines on level, vertical both sides, move again a drawing board, aim at corresponding position, just can mark two other level, vertical line (or hypotenuse).
3. align with ruler (5) scale in a limit of square (10), rectangle (11), triangle (7), parallelogram (8), trapezoidal (9) level, and the perpendicular edge of right angled triangle (7) is alignd with ruler (6) scale.Easily find size when drawing above-mentioned figure by mathematical board.
4. circular (15), oval (16), equilateral triangle (17), symmetrical triangle (18), prismatic (19), pentagon (20), hexagon (21) all indicate symmetrical center line.At 1/2 place of the central radius of protractor (22), open the wide groove of 30-150 degree 2mm; Horizontal level is opened the 2mm groove.Overcome on the market protractor in the Geometric figure drawing plate can not strike horizontal line, the minor radius garden is lonely and fan-shaped shortcoming, facilitates the student.
The positive rim circumference of each circular port is less than the reverse side rim circumference on the base plate.
The step at the base plate back side becomes to stand like the legs of a tripod steadily, guarantees to draw the line quality of all figures on the mathematical board.
Description of drawings:
Fig. 1 is the utility model structure principle chart.
Fig. 2 is the utility model dorsal view.
The specific embodiment:
The utility model is made of a transparent plastic base plate.The reverse side of base plate, upper edge, the inside 2mm of lower arris place, the rectangular step (1,2) of 2*2mm is set, the inside 2mm of reverse side covering of the fan top arris place at protractor, 2*2mm arc platform (3) is set consists of " tripodia pushes up vertical " placement steadily, the arris of all figures in the base plate is not contacted with paper, larger noncontact space is arranged.
3 on the summit of the following left end of the zero point of the zero point of lower edge ruler (5) scale, left margin ruler (6) scale and base plate overlaps and is that a bit (A), the terminal point of the zero point of upper edge ruler (4) scale, left margin ruler (6) scale overlap with 3 on the summit of base plate top left end and is a bit (B).
Align with base plate lower edge ruler (5) scale in the base of right angled triangle (7), parallelogram (8), trapezoidal (9), square (10), rectangle (11), the perpendicular edge of right angled triangle (7) is alignd with left margin ruler (6) scale.Equilateral triangle (12), symmetrical triangle (18), pentagon (20), hexagon (21), circular (15), oval (16), prismatic (19) all indicate centre symmetry line.
Open 1/2 position of the wide groove of 2mm and radius in position, protractor base, open the wide groove of (30-150) degree 2mm.
Claims (3)
1. relieved convenient mathematical board is made of a transparent plastic base plate, and ruler (4,5,6) is arranged on the limit of base plate, triangle (7), parallelogram (8), trapezoidal (9), square (10), rectangle (11), protractor (22) is characterized in that: at the reverse side of base plate, and upper edge, the inside 2mm of lower arris place arranges the rectangular step of 2*2mm, the inside 2mm of reverse side covering of the fan top arris place at protractor arranges 2*2mm arc step.
2. relieved convenient mathematical board according to claim 1, it is characterized in that, be carved with ruler (4,5,6) on the upper edge of described base plate, lower edge, the left margin, be same zero point the zero point of the zero point of lower edge ruler (5) and left margin ruler (6), and the terminal point of the zero point of upper edge ruler (4) and left margin ruler (6) is for a bit.
3. relieved convenient mathematical board according to claim 1, it is characterized in that, align with base plate lower edge ruler (5) scale in the base of described right angled triangle (7), parallelogram (8), trapezoidal (9), square (10), rectangle (11), the perpendicular edge of right angled triangle (7) is alignd with left margin ruler (6) scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220099647 CN202703025U (en) | 2012-03-16 | 2012-03-16 | Secure and convenient mathematics board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220099647 CN202703025U (en) | 2012-03-16 | 2012-03-16 | Secure and convenient mathematics board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202703025U true CN202703025U (en) | 2013-01-30 |
Family
ID=47583359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220099647 Expired - Fee Related CN202703025U (en) | 2012-03-16 | 2012-03-16 | Secure and convenient mathematics board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202703025U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299050A (en) * | 2019-07-06 | 2019-10-01 | 宁波同舟文化传媒有限公司 | International number form evil spirit plate |
-
2012
- 2012-03-16 CN CN 201220099647 patent/CN202703025U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299050A (en) * | 2019-07-06 | 2019-10-01 | 宁波同舟文化传媒有限公司 | International number form evil spirit plate |
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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: 20130130 Termination date: 20140316 |