CN202156189U

CN202156189U - Multifunctional compasses

Info

Publication number: CN202156189U
Application number: CN 201120220784
Authority: CN
Inventors: 张可可; 浦灵敏
Original assignee: Chien Shiung Institute of Technology
Current assignee: Chien Shiung Institute of Technology
Priority date: 2011-06-27
Filing date: 2011-06-27
Publication date: 2012-03-07
Anticipated expiration: 2021-06-27

Abstract

The utility model discloses multifunctional compasses, which comprise a positioning leg, a measuring leg and a measuring disc. The upper portion of the positioning leg and the upper portion of the measuring leg are fixed together, and the measuring disc comprises a measuring portion and a fixing portion which is used for fixing the measuring disc onto the positioning leg. The measuring portion comprises a measuring part and an angle index plate which is positioned at the edge of the measuring part, and both the measuring portion and the measuring part are in quarter circle shapes. The multifunctional compasses integrate functions of a ruler and a protractor, so that functions of measuring length of segments and angles can be realized. In addition, the multifunctional compasses can be used for not only measuring trigonometric function values and inverse trigonometric function values corresponding to angles, but also drawing circles with given radiuses, thereby being simple and convenient in use.

Description

Multifunctional compass

Technical field

The utility model relates to a kind of drawing instrument, particularly relates to a kind of multifunctional compass.

Background technology

Need carry multiplex's tool carefully in student's study: pen, cutter, ruler, protractor, compasses, or the like, quantity is many, and it is big to take up space, and carry also inconvenience, and buying expenses is also bigger; A various tool often pencil box all can not load, thus need various tool be integrated, for student's pencil box is born.

Compasses are student or staff's drawing instrument commonly used in study, work, but present compasses function singleness can only be used to paint circle.Protractor is the instrument that work is used to take measurement of an angle, but when the use amount hornwork takes measurement of an angle, must know that angle just can be measured in the both sides at angle, extremely inconvenience.And it is inevitable related with trigonometric function to use angle, must measure angle substitution formula calculating more earlier and calculate trigonometric function, and whole process is very loaded down with trivial details.

The utility model content

The utility model purpose: the purpose of the utility model is in order to solve the deficiency of prior art; A kind of multifunctional compass that the function of ruler, protractor, compasses is integrated in one is provided, and the trigonometric function value that simultaneously the said compasses of the utility model can also angle is measured and the calculating of antitrigonometric function.

Technical scheme: in order to realize above purpose, the described a kind of multifunctional compass of the utility model, it comprises: angle with measure pin, said angle with measure pin top and be fixed together; It also comprises: measuring disk, and said measuring disk comprises: measurement section and fixed part; Said fixed part is fixed in measuring disk on the angle; Said measurement section comprises: measure body and angle dial; Angle dial is positioned at the outer of measuring body; Said measurement section all is one 1/4 circle with measuring body.The above-mentioned compasses that are made up of angle, measurement pin and measuring disk luminous energy are drawn circle, and directly angle is measured.

Respectively be provided with a semicircle on two right-angle sides of the body of measurement described in the utility model, be respectively: semicircle D and semicircle E, said semicircle D and semicircle E are diameter with the right-angle side of measuring body; That is: the radius of measurement body is the twice of semicircle D and semicircle E radius; Said measurement pin and angle opposed side edges are provided with the trigonometric function dial.On the measurement body, add two semicircles and the trigonometric function dial is set on angle, SIN function, cosine function that requirement is taken measurement of an angle can be directly through measuring; And measured SIN function, cosine function, and then can obtain tangent value, cotangent value easily through formula.

Measurement pin and angle opposed side edges are provided with the scale graduation dish described in the utility model; The adding of scale graduation dish can be used to draw known radii circle and can measure the length of unknown line segment.

The side of angle described in the utility model is provided with the length dial that is used for the slotted line segment length; The adding of length dial can be used to measure the length of line segment, has realized the measurement function of ruler.

Beneficial effect: the utility model compared with prior art has the following advantages:

1, the described multifunctional compass of the utility model merges the function of ruler, protractor in the compasses, can realize slotted line segment length, the function that takes measurement of an angle;

2, the described multifunctional compass of the utility model can also be measured the trigonometric function value (comprising the angle of known dimensions and the angle on known both sides) of corresponding angle and the value of antitrigonometric function, and is easy to use;

3, the described multifunctional compass of the utility model fenestra that can be used in the known radii of drawing in addition can be measured the length of unknown line segment.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the structural representation of angle in the utility model.

Fig. 3 is a structural representation of measuring pin in the utility model.

Fig. 4 is the structural representation of measuring disk in the utility model.

Fig. 5 is the structural representation of measurement section in the utility model.

Fig. 6 is the sketch map among the utility model embodiment.

The specific embodiment:

Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the utility model; Should understand these embodiment only be used to the utility model is described and be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.

Embodiment

A kind of multifunctional compass shown in Fig. 1-5 comprises: angle 1, measurement pin 2 and measuring disk 3.

Angle 1 as shown in Figure 2 comprises: swivel head 11, angle connector 12 and backstay 13; Backstay 13 sides are provided with length dial 14.

Measurement pin 2 as shown in Figure 3 comprises: measure pin connector 21 and measuring stick 22; Measuring stick 22 is provided with trigonometric function dial 23 and scale graduation dish 24 with backstay 13 opposed side edges.

Comprise like Fig. 4, measuring disk 3 shown in Figure 5: measurement section 31 and fixed part 32; Measurement section 31 comprises: measure body 311 and angle dial 312; Angle dial 312 is positioned at the outer of measuring body 311; Said measurement section 31 all is one 1/4 circle with measuring body 311;

Respectively be provided with a semicircle on two right-angle sides of measurement body 311 as shown in Figure 5, be respectively: semicircle D and semicircle E, said semicircle D and semicircle E are diameter with the right-angle side of measuring body 311, the radius of measuring body 311 is the twice of semicircle D and semicircle E radius.

The annexation of above-mentioned parts is following:

Angle connector 12 on the angle 1 links together angle 1 and measurement pin 2 with the measurement pin connector of measuring on the pin 2 21; Fixed part 32 on the measuring disk 3 is connected with backstay 13 measuring disk 3 is fixed on the backstay 13 on one side; The summit of angle 1 and the joining of measuring pin 2 and measurement section 31 is intersected and is called the A point together, and the inner side edge end points of angle 1 is B point (like Fig. 1, shown in Figure 2), and the inner side edge end points of measuring pin 2 is C point (like Fig. 1, shown in Figure 3).

In the present embodiment on the angle 1 the AB edge lengths equal the length on AC limit.

When adopting present embodiment to measure, concrete operations are following:

1, takes measurement of an angle

At first alignd with two limits of tested angulation in AB limit, AC limit, the angle value of on the angle dial 312 that intersects with the AC limit, reading then is the angle value of measured angle.

2, measure sine value

Method one: the situation on the both sides of known angle; Alignd with two limits of tested angulation in AB limit, the AC limit of the said compasses of present embodiment; AC limit and semicircle D intersect to produce intersection point, read that trigonometric function dial 23 is the sine value of asking at the numerical value of this intersection point on the AC limit.

Method two: the situation of the size of known angle, on horn craving scale 312, find out the value of this angle, the AC limit is slided on this scale value, AC limit and semicircle D intersect and produce intersection point, read that trigonometric function dial 23 is the sine value of asking at the numerical value of this intersection point on the AC limit.

3, measure cosine value

Method one: the situation on the both sides of known angle, alignd with two limits of tested angulation in AB limit, AC limit, AC limit and semicircle E intersect to produce intersection point, read that trigonometric function dial 23 is the cosine value of asking at the numerical value of this intersection point on the AC limit.

Method two: the situation of the size of known angle; On horn craving scale 312, find out the value of this angle, the AC limit is slided on this scale value, AC limit and semicircle E intersect to produce intersection point, read that trigonometric function dial 23 is the cosine value of asking at the numerical value of this intersection point on the AC limit.

4, tangent

With the sine value and the cosine value substitution tangent formula that measure, promptly remove cosine value with sine value, be the tangent value of being asked.

5, cotangent:

With the sine value and the cosine value substitution cotangent formula that measure, promptly remove sine value with cosine value, be the cotangent value of being asked.

6, arcsin function:

AC limit and semicircle D are intersected, and the reading of joining on trigonometric function dial 23 equates that with the sine value of wanting angle measurement then AC limit and the reading of angle dial 312 joinings on angle dial 312 are the values of the SIN function of negating.

7, inverse cosine function:

AC limit and semicircle E are intersected, and the reading of joining on trigonometric function dial 23 equates that with the sine value of wanting angle measurement then AC limit and the reading of angle dial 312 joinings on angle dial 312 are the values of the cosine function of negating.

8, survey unknown line segment length:

B, 2 of C are overlapped with the two-end-point that requires line segment respectively, read the scale M on the angle dial 312 this moment, the AC limit of sliding then makes it at the M/2 place, and this moment, AC limit and the reading of D semicircle joining on scale graduation dish 24 were desired values.

As shown in Figure 6, the length of known R is asked the length of line segment y, measures the sine value Sina of angle a with multifunctional compass; Through formula S ina=(y/2)/R=y/ (2R); Obtain y=2RSina; Can obtain the length of y.

9, draw the circle of known radii:

Draw the circle of known radii, reality is exactly to survey the inverse process of unknown line segment size.Elder generation slip AC limit; Make AC limit and the reading of semicircle D joining on scale graduation dish 24 by the radius that will draw of institute; Read the number of degrees M on the angle dial 312, the AC limit of sliding then is to the 2M number of degrees place of H dial, this moment BC size be exactly the radius length that will draw.

Claims

1. multifunctional compass, it comprises: angle (1) and measure pin (2), said angle (1) is fixed together with measurement pin (2) top; It is characterized in that:

It also comprises: measuring disk (3), and said measuring disk (3) comprising: measurement section (31) and fixed part (32);

Said fixed part (32) is fixed in measuring disk (3) on the angle (1);

Said measurement section (31) comprising: measure body (311) and angle dial (312); Angle dial (312) is positioned at the outer of measuring body (311); Said measurement section (31) and measurement body (311) all are one 1/4 circle.

2. a kind of multifunctional compass according to claim 1; It is characterized in that: respectively be provided with a semicircle on two right-angle sides of said measurement body (311); Be respectively semicircle D and semicircle E, said semicircle D and semicircle E are diameter with the right-angle side of measuring body (311); The radius of promptly measuring body (311) is the twice of semicircle D and semicircle E radius; Said measurement pin (2) is provided with trigonometric function dial (23) with angle (1) opposed side edges.

3. a kind of multifunctional compass according to claim 2 is characterized in that: said measurement pin (2) is provided with scale graduation dish (24) with angle (1) opposed side edges.

4. a kind of multifunctional compass according to claim 1 is characterized in that: said angle (1) side is provided with the length dial (14) that is used for the slotted line segment length.