CN2233843Y - Multi-purpose set square - Google Patents
Multi-purpose set square Download PDFInfo
- Publication number
- CN2233843Y CN2233843Y CN 95224438 CN95224438U CN2233843Y CN 2233843 Y CN2233843 Y CN 2233843Y CN 95224438 CN95224438 CN 95224438 CN 95224438 U CN95224438 U CN 95224438U CN 2233843 Y CN2233843 Y CN 2233843Y
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- China
- Prior art keywords
- square
- function
- utility
- isosceles
- model
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- Expired - Fee Related
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- Length-Measuring Instruments Using Mechanical Means (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to a multi-purpose set square which is composed of an equicrural drawing square and a drawing square with 30 DEG-60 DEG. A protractor hole with a certain shape is arranged on the equicrural drawing square, and a table edge is arranged on the short vertical angle edge of the drawing square with 30 degees-60 DEG (or arranged on the oblique edge of the equicrural drawing square). The calculation function of the trigonometric function and inverse trigonometric function can be obtained by the matching of the table edge and the protractor hole, and the functions of an ordinary set square, a T-square and an angle square are combined. The utility model has the advantages of simple and optimized structure, complete function, convenient operation, strong versatility, etc.
Description
The utility model relates to a kind of multipurpose set square.
At present, common set square, protractor and various ruler, various in style, function is more single, generally can only measure, draw, though the function that has is more, but complex structure uses inconvenience.
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of have trigonometric function and antitrigonometric function computing function are provided, and compatible amount picture function, structure optimization, the multipurpose set square of highly versatile.
The purpose of this utility model is achieved in that a kind of multipurpose set square is made up of isosceles drawing square and 30 ° of-60 ° of drawing squares, it is characterized in that having on the isosceles drawing square protractor hole of given shape, it is surrounded by vertical edge, horizontal sides and circular arc limit; The short right-angle side of 30 ° of-60 ° of drawing squares or the hypotenuse of isosceles drawing square are provided with the platform edge; Preferably platform is along being located on the short right-angle side of 30 ° of-60 ° of set squares.
Adopt the utility model can realize above-mentioned purpose.The short right-angle side of the hypotenuse of isosceles drawing square and 30 ° of-60 ° of drawing squares can rely on platform along making the parallel sliding of constant space, thereby guarantees that the zero graduation line on the long right-angle side of 30 ° of-60 ° of drawing squares overlaps with the diameter line maintenance in protractor hole.
According to the trigonometric function formula:
sinα＝y/r cosα＝x/r sinα＝cos(90?°-α)
Tg α=y/x ctg α=x/y tg α=ctg (90 °-α) r is the circular arc limit radius in protractor hole; Y is 30 ° of scale values on-60 ° of long right-angle sides of drawing square, and x is the scale value on the isosceles right triangle hypotenuse.Utilize 30 ° of-60 ° of drawing squares to overlap the place like this, read corresponding angle and length value, can accurately and apace calculate trigonometric function and antitrigonometric function value with the intersection, circular arc limit in protractor hole or with vertical edge.Perhaps utilize the scale on the isosceles drawing square hypotenuse to calculate.
After the short right-angle side of 30 ° of-60 ° of drawing squares is provided with the platform edge, can be used as small-sized T-square or angle square and use.
Superiority of the present utility model is, in the time of compatible common set square profile and amount picture function, has realized trigonometric function, antitrigonometric function calculating and T-square, angle square function dexterously.Optimization simple in structure, multiple functional easy to use, highly versatile.
With most preferred embodiment in detail the utility model is described in detail below in conjunction with accompanying drawing.
Fig. 1 is an isosceles drawing square structural representation of the present utility model;
Fig. 2 is 30 ° of-60 ° of drawing square structural representations of the present utility model;
Fig. 3 is a user mode schematic diagram of the present utility model;
Have protractor hole 3 on the isosceles drawing square 1 as shown in Figure 1, it is surrounded by vertical edge 4, horizontal sides 5 and circular arc limit 6, horizontal sides 5 long (50
Mm, circular arc limit 6 radius 50mm; Be carved with metric system scale 7 on the hypotenuse, its zero point and the vertical hypotenuse of dividing equally of protractor hole 3 circle center line connectings;
As shown in Figure 2, the short right-angle side of 30 ° of-60 ° of drawing squares 2 is provided with platform along 8, long right-angle side is carved with metric system scale 7, and its zero groove and platform equal the hypotenuse of isosceles drawing square and the distance of horizontal sides 5 along 8 distance, and one section minimum scale of 0-50mm is 0.5mm.
As shown in Figure 3, the platform that the hypotenuse of isosceles drawing square 1 is leaned against 30 ° of-60 ° of drawing squares 2 is along on 8 and parallel sliding, both are when certain relative position or the long right-angle side of 30 ° of-60 ° of drawing squares 2 when overlapping with the vertical edge 4 of isosceles drawing square 1, read series data, can calculate trigonometric function and antitrigonometric function value.
According to the trigonometric function formula: sin α=y/r cos α=x/r sin α=cos (90 °-α) tg α=y/x ctg α=x/y tg α=ctg (90 °-α) because r=50mm
, then
sinα＝y/r＝y/50＝2y×10
-2
tgα＝y/x＝3y×10
-2
If the least unit of y is got 0.5mm, so above-mentioned trigonometric function value is accurate to 0.005 and 0.0075 respectively, and the compute classes of other trigonometric function and antitrigonometric function value seemingly.
Claims (2)
1, a kind of multipurpose set square, form by isosceles drawing square (1) and 30 ° of-60 ° of drawing squares (2), it is characterized in that having on the isosceles drawing square (1) the protractor hole (3) of given shape, it is surrounded by vertical edge (4), horizontal sides (5) and circular arc limit (6), and the hypotenuse of the short right-angle side of 30 ° of-60 ° of drawing squares (2) or isosceles drawing square (1) is provided with platform along (8).
2, multipurpose set square according to claim 1, the platform that it is characterized in that 30 ° of-60 ° of drawing squares (2) is located on the short right-angle side along (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95224438 CN2233843Y (en) | 1995-10-13 | 1995-10-13 | Multi-purpose set square |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95224438 CN2233843Y (en) | 1995-10-13 | 1995-10-13 | Multi-purpose set square |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2233843Y true CN2233843Y (en) | 1996-08-28 |
Family
ID=33871222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95224438 Expired - Fee Related CN2233843Y (en) | 1995-10-13 | 1995-10-13 | Multi-purpose set square |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2233843Y (en) |
-
1995
- 1995-10-13 CN CN 95224438 patent/CN2233843Y/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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |