CN86205658U

CN86205658U - New drawing instrument with the functions of compasses, protractor and set square

Info

Publication number: CN86205658U
Application number: CN 86205658
Authority: CN
Inventors: 张福贵
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-08-09
Filing date: 1986-08-09
Publication date: 1987-09-09

Abstract

The utility model discloses a drawing instrument with the functions of compasses, protractors and set squares, which is a drawing instrument which organically combines a compass, a protractor and a set square to form an integral body. A special disc (or a plane rotary body with other shapes) which is made of organic glass, etc., balances self and is provided with a gauge needle and a radius regulating device replaces traditional bipod compasses, protractors, set squares, etc., and skillfully combines with a transparent triangle and a wooden set square to be made into a universal ruler (straight rulers, scales, French curves, protractors and compasses) for students and teachers.

Description

New drawing instrument with the functions of compasses, protractor and set square

This New drawing instrument with the functions of compasses, protractor and set square is the drawing instrument that combinations such as compasses, protractor and set square are become one, itself and transparent triangle and wooden set square make up differently, can obtain the student of several forms and teacher with multi-purpose rule (ruler, engineer's scale, curve ruler, protractor, compasses).

Existing miscellaneous multi-purpose rule, the function that scarcely possesses the picture circle, if can draw circle, then not to have limited several circular holes on the chi face, an end that is exactly multi-purpose rule has a hole, must specially put on pin, as the center of circle, in a limited number of apertures of the other end, plug nib, draw a limited number of circles.Like this, one, when drawing circle, chi shows with pin and combines, operate more numerous, its two, the chi rotation that rubs on paper, the figure of having finished on the paper of easily making dirty; Its three, be that whole chi rotates around pin during rotation, not consider " object around the axle rotation by center of gravity easily rotates " this principle, effort when therefore rotating, and center of circle movability; Its four, can only make a limited number of circles.Moreover the protractor part range of this chi only is 0～180 °, can not measure 180 °～360 ° angle.Therefore, this class chi is restricted in the use, and it gives people's impression is one " dead chi ".

The compasses that the student uses are if the simple and easy compasses of the iron plate system of use easily go wrong, with just can not normally not used for a long time.If use the accurate compasses of drawing usefulness, price is high again, and the student also is not suitable for.Wooden set square, protractor, compasses that present large, medium and small teacher uses are three larger-size teaching aids, carry very inconvenient.When using compasses construction in addition, rule pin and smooth glass plate easy " skidding ", and ear-piercing noise takes place.

The purpose that designs this New drawing instrument with the functions of compasses, protractor and set square is exactly to provide a cover to handle very skillfully, map rapidly, have enough accuracy, " work chi " easy to carry to numerous teachers and students and drawing personnel.

The disk of this New drawing instrument with the functions of compasses, protractor and set square (or the plane rotary body of other shape, as follows) but there is the rule pin adjusting device of flexible modulation at the center of gravity place, draws bowlder rule pin and screws out, but cycle after painting.Disk has the radius adjusting device that can change the radius of circle size arbitrarily again, can transfer to flexibly and can fix according to the radius that requires.The disk downside has the concentric colored annulus of multiple tracks, and indicates the size of its radius, and the circle of desire work just can find in advance.Have the groove of rectangle (or other shape) on the disk, be used for straight line, ellipse or other curve.

The advantage of this New drawing instrument with the functions of compasses, protractor and set square is:

The disk of New drawing instrument with the functions of compasses, protractor and set square (or plane rotary body of other shape) itself just can be used to picture circle, angulation, makes straight line, selects engineer's scale, paints ellipse or other curve; Itself and transparent triangle make up, and can make and make straight line, select the effect of engineer's scale outstanding; Itself and wooden set square make up, and the teacher easy to carry who can be made into the energy folding uses multi-purpose rule (a chi multipotency: straight line, engineer's scale, curve ruler, protractor, compasses);

Rule pin adjusting device can screw out precession to the rule pin, and time spent rule pin screws out, and uses up cycle, has so both protected the rule pin, has prevented that again the rule pinprick from breaking its thing;

The radius adjusting device can change the size of radius of circle arbitrarily, therefore can make unlimited circle commonly used;

Because disk self is with respect to the rule pin balance by its center of gravity, therefore not only easily rotation flexibly of bowlder is done in rotation, and disk is by advising pins " suspension " on paper, the figure that has drawn on the paper of can not making dirty;

The use of the concentric colored annulus of translucent multiple tracks can make mapping convenient, rapidly, particularly some during complicated mapping (as: known two straight lines and a circle, it is tangent or the like to do the certain circle of a size and they ...), more superior;

The pen of making circle does not resemble the compasses restricted, as long as in the hole with the nib insertion radius adjusting device of pencil, ball pen, crayon, pen, can justify;

Because disk border is carved with angle, so range is 0～360 °, double for 0～180 ° than the standing crop hornwork, and the top, angle during angulation can be fixed by the rule pin, can rotate again, is easy to use;

The all parts of this New drawing instrument with the functions of compasses, protractor and set square (comprising that student, teacher that New drawing instrument with the functions of compasses, protractor and set square is housed use multi-purpose rule) are all detachable, and maintenance is convenient;

The teacher that New drawing instrument with the functions of compasses, protractor and set square is housed is foldable again with multi-purpose rule, so structure is light and handy, and is easy to carry;

This New drawing instrument with the functions of compasses, protractor and set square has fundamentally changed method for making, the usage of metal and wooden bipod compasses, therefore saved steel, timber, and its mapping precision does not subtract.

Concrete structure of this New drawing instrument with the functions of compasses, protractor and set square and using method are (referring to Figure of description.Ratio 1:15) as follows:

On the cover 2, when rotary sleeve 3, interior cover 2 can screw on and screw off in rule pin 1 was fixed on, thereby but 1 spinning in and out of rule pin, inside and outside applying mechanically is threaded.Overcoat 3 is enclosed within half pressure ring 4, and can rotate in half pressure ring 4.Half pressure ring 4 is fixed on the disk 6 by three screws 5.More than be that the rule pin is transferred loop device.

Slide block 7 hollows are tapered, and nib can be put in its underpart, slide block 7 by its outside screw thread with screw being threaded of overcoat 8 inboards.Slide block 7 can move radially along groove 9, move to the radius of requirement after, will screw overcoat 8 and screw, just can justify.It more than is the radius adjusting device.

Disk border is carved with angle 10,0～360 ° of its range.Lower disk surface is carved with translucent color ring 11, and its width is 2mm.

Have the groove of rectangle (or other shape) on the disk again, be used for straight line, ellipse or other curve, but, do not draw in the accompanying drawing for for the purpose of clear.

Claims

1, this New drawing instrument with the functions of compasses, protractor and set square is a kind of drawing instrument, it is characterized in that having rotating circular disk (or rotary body of other shape), rule pin adjusting device is housed in the center of circle, scale (0 ° to 360 °) is arranged on its disc circumference, have a rectangular channel (or other shape) along radial direction, slidingtype radius adjusting device is housed, the various paintbrushes of can packing in the groove.

2, New drawing instrument with the functions of compasses, protractor and set square according to claim 1 is characterized in that the rule pin adjusting device of being made up of rule pin, interior cover and overcoat (or other form) can screw out precession with the rule pin; Can in groove, slide by the radius adjusting device that slide block and thread jacket (or other form) are formed, and can fix.