CN2373282Y

CN2373282Y - Multifunction angle drawing appliance

Info

Publication number: CN2373282Y
Application number: CN 99213319
Authority: CN
Inventors: 李昕; 郭竞雄
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-11
Filing date: 1999-06-11
Publication date: 2000-04-12
Anticipated expiration: 2009-06-11

Abstract

The utility model provides a multifunctional angle-drawing appliance, which belongs to the drawing teaching aids and especially has the simple and convenient functions of a ruler, drawing angles and circles, measuring angles, calculating trigonometric functions, etc. The multifunctional angle-drawing appliance is provided with a ruler, a circle-drawing ruler, a protractor, a positioning sleeve, etc., wherein, the protractor is in expanding arrangement at one side of an 'O' point of the ruler, the protrusion center at one end of the circle-drawing ruler is coincident with the circle center of the protractor and the 'O' point of the ruler, an elongated slot is arranged on a central shaft of the circle-drawing ruler, the 'O' point is provided with a small hole, and the positioning sleeve which is provided with a penetrating small hole in the center is sheathed on the circle-drawing ruler.

Description

The multifunction picture hornwork

The utility model relates to a kind of drawing teaching aid.

Teaching is widely used with the angle drawing device of study usefulness.When drawing the angle with common angle drawing device, need to draw earlier straight line, measure angle again, draw straight line at last, it is convenient inadequately to use.CN 2290090Y patent provides a kind of multipurpose geometric chi, is made up of 4 rulers, and three rulers connect from beginning to end, and another ruler one end is connected in the set square summit; Constitute on two rulers of set square two waists, respectively have an elongated slot that the tie point that constitutes the set square summit can be slided along elongated slot along its length, thereby constitute arbitrary triangle.The set square base moves up and down with respect to the angle index on the 4th ruler can read the set square base angle number of degrees; With the set square summit is the center of circle, is radius with a certain length scale on the 4th ruler, and rotating the 4th ruler can the picture circle.

It is a kind of easy, quick that the purpose of this utility model is to provide, and has the multifunction picture hornwork of functions such as ruler, picture angle and angulation, picture circle, calculating trigonometric function.

The utility model is provided with a ruler, extends a semicircle protractor at the O of ruler point place to the side direction of ruler, and the O point of ruler overlaps with the center of circle of protractor.Be provided with second ruler (claiming picture circle ruler) side by side in the same side that ruler extends protractor, an end of drawing the circle ruler extends a protuberance that is interlockingly connected with protractor towards first ruler, and the center of protuberance overlaps with the center of circle of protractor, and rotates around the center of circle.Draw the central shaft of circle ruler and offer elongated slot,, establish aperture at the O dot center place of drawing the circle ruler drawing sheathed one transparent can establishing at the center of positioning sleeve and run through aperture on the circle ruler along drawing the positioning sleeve that the circle ruler moves.At the 10cm place of two rulers calibrate, and set a set square.

Of the present utility model simple in structure, use simple and directly, have ruler, draw the angle, draw circle, calculate functions such as trigonometric function.Because ruler indicates scale, therefore can be used as ruler and use.Because protractor and ruler and draw circle ruler is ingenious and combine, so can arbitrarily draw angle or angulation.Owing on picture circle ruler that indicates scale and positioning sleeve, establish aperture, make that the distance between two apertures can arbitrarily change, the circle of the different radii that therefore can draw.Simultaneously, utilize the corner of trigonometric function to concern Sin α=opposite side/hypotenuse etc., only need mix the set square of band scale, can directly draw the trigonometric function value at various angles.

Fig. 1 is a structure chart of the present utility model.

As Fig. 1, the utility model is established ruler 1, protractor 2, is drawn circle ruler 3 and positioning sleeve 4, and protractor 2 extends in ruler one end side, draws the end of circle ruler 3 and establishes the semicircle protuberance that is interlockingly connected with protractor, and its center overlaps with the center of circle 21 of protractor 2.Draw circle ruler 3 central shafts and establish elongated slot 31, establish aperture 32 at O dot center place.Establish at the center of positioning sleeve 4 in addition and run through aperture 41.

Claims

1. multifunction picture hornwork, it is characterized in that being provided with ruler, draw circle ruler, protractor, positioning sleeve, semicircular protractor extends a side of ordering in ruler O, draw the circle ruler and be located at ruler one side side by side, draw an end of circle ruler and establish protuberance, the center of protuberance overlaps with the center of circle of ruler O point and protractor, and drawing circle ruler and ruler can be around this center of circle rotation; Draw the central shaft of circle ruler and offer an elongated slot, establish aperture at O dot center place; Positioning sleeve is placed on the picture circle ruler, establishes at the center of positioning sleeve and runs through aperture; At the 10cm place of two rulers calibrate.

2. multifunction picture hornwork as claimed in claim 1 is characterized in that the set protuberance in picture circle ruler one end is the semicircle identical with semicircular protractor.