CN2272820Y

CN2272820Y - Moving combination ruler

Info

Publication number: CN2272820Y
Application number: CN 95232406
Authority: CN
Inventors: 方文龙
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-10-09
Filing date: 1995-10-09
Publication date: 1998-01-21
Anticipated expiration: 2005-10-09

Abstract

The utility model relates to a moving combination ruler used for calculating and drawing the rim angle of a triangular, and calculating the trigonometric function values. The utility model is characterized in that the moving combination ruler is composed of a main ruler 1, an auxiliary ruler A2, and an auxiliary ruler B3. The auxiliary ruler A 2 and the auxiliary ruler B3 can carry out he relative slide on the straight groove and the arc-shaped groove of the main ruler 1, and can form an arbitrary angle whose degree is lower than 90 DEG. The reading number of the formed rim angle can be directly read from three rulers. Therefore, the utility model can rapidly and accurately draw triangular, angle, parallelogram, trapezoid, square, or rectangle, and other figures according to the requirement, and carry out the calculation of the rim angle of the triangular and the trigonometric function value. The utility model with simple structure can be extensively used for teaching and drawing of the scientific and technical personnel.

Description

A kind of removable combination ruler

The utility model relates to and a kind ofly is used to draw and removable combination ruler that triangle corner and trigonometric function value calculate.

At present, when people draw triangle, angle, parallelogram, trapezoidal, square or rectangle figures,, draw tired lock and often cause figure inaccurate, bring difficulty to working and learning mainly by protractor and fixing set square; In addition, when carrying out the calculating of triangle corner and trigonometric function value, still need use mathematic(al) table, not only bother but also not directly perceived, be easy to occur mistake in computation.

Task of the present utility model is to provide a kind of removable combination ruler, adopt this removable combination ruler, both can draw triangle, angle, parallelogram, trapezoidal, square or rectangle figures rapidly, accurately, and can carry out triangle corner and trigonometric function value again rapidly, accurately, intuitively and calculate.

The utility model is to realize like this.It is made up of main scale 1, pair chi A2, pair chi B3, screw 4, its assembling process is as follows: will pay deep-slotted chip breaker on the chi A2 and the straight trough on the main scale 1 earlier to good, pay chi A2 ruler section and main scale 1 ruler section at grade, with screw 4 fixing (but the two is slided relatively) in groove; To pay chi B3 again and go up deep-slotted chip breaker on straight trough and the main scale 1, pay chi B3 and main scale 1 ruler section at grade, and fix (but can make the two slip relatively in groove) with screw 4 and promptly assemble and finish good.

During use, pay chi A2 and can on main scale 1 straight trough, slide relatively, and can form the following any angle of 90 degree; Paying chi B3 can slide on main scale 1 deep-slotted chip breaker relatively, and can form the following angle arbitrarily of 90 degree; Paying the zero point of chi B3 length can slide on the limit of paying chi A1, and the length of three chis is the Length Indication point zero point, and angle is directly read on main scale 1, pair chi A2 by the angle index line.Therefore, with this removable combination ruler, both can draw triangle, angle, parallelogram, trapezoidal, square or rectangle figures rapidly, accurately, and can carry out the calculating of triangle corner and trigonometric function value again rapidly, accurately, intuitively.As:

1. drafting triangle: as long as provide the leg-of-mutton condition (both sides angle or three limits or two jiaos of contained sides) of doing, pay chis with regard to removable two and form triangle, and can draw by given condition.

2. paint the angle:, with regard to removable pair of chi A2 or pay a chi B3 and press specified criteria formation angle, and can one draw as long as provide the condition (number of degrees and two edge lengths) of doing the angle.

3. drafting parallelogram: by given both sides and an acute angle, move earlier and pay chi A2 or pay chi B3, make an acute angle and both sides, move again and make the 3rd limit, connect the 4th limit and promptly finish.

4. draw trapezoidal: by given two acute angles and base, move two and pay chis, just can form three limits and two acute angles of needed figure, draw become figure after, the top margin line is promptly drawn and is finished.

5. draw square or rectangle: press specified criteria, pay chi two and be moved into an angle of 90 degrees, main scale demonstrates a length of side, can draw three limits, and the another side line is promptly drawn and finished.

6. carrying out the triangle corner calculates: as long as provide the leg-of-mutton condition (both sides angle or three limits or two jiaos of contained sides) of doing, pay chis with regard to removable two and form triangle by given condition, and can be by reading on the chi reading at the limit of asking or angle.

7. carrying out trigonometric function value calculates: as long as provide the number of degrees that will calculate the angle, pay chi with regard to removable two and form the right angled triangle that contains this angle number by given condition, and can calculate any trigonometric function value at this angle according to three edge lengths by the length of reading this Atria limit on the chi.

The utility model is simple in structure, easy to operate, practical, both can draw triangle, angle, parallelogram, trapezoidal, square or rectangle figures rapidly, accurately, can carry out triangle corner and trigonometric function value again rapidly, accurately, intuitively and calculate.Can be widely used in teaching and scientific and technical personnel and draw, have a extensive future.

Accompanying drawing is the utility model structural representation.

Below in conjunction with accompanying drawing enforcement of the present utility model is further described.

Accompanying drawing shows structure of the present utility model, main scale 1 left part be ruler shape and on top the standard laid down by the ministries or commissions of the Central Government length numeral is arranged, mark numeral place is thinner than other position, and a stepped line that is used for the reading angular numeral is arranged, and in the middle of the ruler part groove is arranged, the wide 5mm in groove bottom, the wide 2mm in top, right part are circular arc more than 1/4, and outer circumferential edge is marked with 0～90 measuring angle numeral, by numeral the inside one wide 2mm deep-slotted chip breaker is arranged, the left part ruler partly is thicker than the right part circular arc shaped portion; Paying chi A2 top is ruler shape, one end is dihedral and indicates platoon leader's number of degrees word on limit, angular vertex place, and the bottom is a circular arc more than 1/4, and outer circumferential edge is marked with 0～90 measuring angle numeral, by numeral the inside one wide 2mm deep-slotted chip breaker is arranged, ruler shape part and circular arc shaped portion be not or not same plane; Paying chi B3 is ruler shape, and an end is dihedral, and other end arc has platoon leader's number of degrees word from angular vertex along limit portion, and there is the straight line of a reading angular numeral at the portion 3mm place of keeping to the side, a groove is arranged, the wide 5mm in groove bottom, the wide 2mm in top in the middle of the chi; Screw 4 is a finished parts.

The utility model master, a pair chi material can be plastics, lucite, aluminium alloy or stainless steel.

Claims

1, a kind ofly is used to draw and removable combination ruler that triangle corner and trigonometric function value calculate.It is characterized in that it by main scale 1, pay chi A2, pay chi B3 etc. and form, and:

A: screw 4 pass that the deep-slotted chip breaker paid on the chi A2 is connected the two with straight trough on the main scale 1 and pair chi A2 ruler section and main scale 1 ruler section at grade;

B: screw 4 pass pay that chi B3 goes up that straight trough is connected the two with deep-slotted chip breaker on the main scale 1 and pair chi B3 and main scale 1 ruler section at grade.

2, root a tree name claim 1 is described a kind ofly is used to draw and removable combination ruler that triangle corner and trigonometric function value calculate, it is characterized in that: main scale 1 left part be ruler shape and on top the standard laid down by the ministries or commissions of the Central Government length numeral is arranged, mark numeral place is thinner than other position, one stepped line that is used for the reading angular numeral is arranged, in the middle of the ruler part a low wide and up narrow elongated slot is arranged, right part is a circular arc more than 1/4, outer circumferential edge is marked with 0～90 measuring angle numeral, by numeral the inside one deep-slotted chip breaker is arranged, the left part ruler partly is thicker than the right part circular arc shaped portion.

3, root a tree name claim 1 is described a kind ofly is used to draw and removable combination ruler that triangle corner and trigonometric function value calculate, it is characterized in that:; Paying chi A2 top is ruler shape, one end is dihedral and indicates platoon leader's number of degrees word on limit, angular vertex place, and the bottom is a circular arc more than 1/4, and outer circumferential edge is marked with 0～90 measuring angle numeral, by mileage word the inside one deep-slotted chip breaker is arranged, ruler shape part and circular arc shaped portion be not or not same plane.

4, root a tree name claim 1 is described a kind ofly is used to draw and removable combination ruler that triangle corner and trigonometric function value calculate, it is characterized in that: paying chi B3 is ruler shape, one end is dihedral, other end arc, one platoon leader's number of degrees word is arranged from angular vertex along limit portion, there is the straight line of a reading angular numeral at the portion 3mm place of keeping to the side, and a low wide and up narrow elongated slot is arranged in the middle of the chi.