CN203172271U - Ruler protractor - Google Patents

Abstract

The utility model relates to the field of teaching measuring tools, in particular to a ruler protractor. The ruler protractor is characterized in that the ruler protractor is mainly composed of a pair of compasses and a protractor body, a chalk positioning device is installed on a movable compasses leg with scales, the protractor body made of organic glass fiber reinforced plastic is fixed with a fixed compasses leg with scales, a magnetic disk is implanted into the protractor body made of the glass fiber reinforced plastic, a control hand shank controls the movable compasses leg with the scales to accurately measure the angle of a corner under the rotation of a movable rotating plate with an arc-shaped sliding rail, chalk can be installed on the chalk positioning device and is driven by the control hand shank to rotate along the arc-shaped sliding rail towards one side, the radius of a circle needing to be drawn is controlled through the angle, and the two legs with the scales can be used as a ruler when being opened by 180 degrees. The ruler protractor has the advantages of being simple in structure, novel and unique in shape and reasonable in design.

Description

The scale protractor

Technical field

The utility model relates to a kind of teaching measurer technical field, a kind of scale protractor.

Technical background

At present, " the young chi of snake " is the chi that special use comes trace.Set square is the chi of right angled triangle or isosceles triangle, conveniently draws parallel lines or vertical line.Slide ruler: a kind of computational tool.Tape: be commonly used to measure human body parts.Draw chi: be used for measuring building, furniture etc.Slide measure: the more smart little thing of the amount of being used for.In construction with ruler and compasses, chi is regarded as drawing the instrument of the straight line of infinite length.

Two duplicate elongated set squares can be combined into an equilateral triangle.The hypotenuse length of elongated set square is the twice of short right-angle side length.

Compasses are made of nib, rotating shaft, compasses supporting leg, lattice chi, hinged joint, handwriting, nib, compasses point, microtia, the upper end that is connected handwriting is inserted in the lower end of its nib, the lower end of the formation of handwriting compasses is threaded in the upper end of nib, the concordant end of microtia is welded in the middle of the outside of compasses supporting leg, and the lower end of compasses supporting leg clamps the upper end that is connected the compasses point.

The one side of handwriting is pasted the one side that is connected hinged joint, and the another side of hinged joint is pasted and is connected in the middle of the end of lattice chi, and the two ends that are connected rotating shaft are inserted in both sides, the crack of handwriting upper end, and the axis body of rotating shaft wears the upper end that is connected the compasses supporting leg.

The natural sciences instructors often has set square, compasses, ruler, Angle protractor etc. in teaching, and many problems of carrying inconvenience are arranged.In the teaching use, fall on the ground from blackboard through being everlasting careless to slip out of the hand, be easy to hurt and teach teacher and influence teaching time and safety.

Summary of the invention

In order to overcome the vacancy of prior art, the utility model provides a kind of scale protractor, and being convenient for carrying use is the scale protractor that can inhale on blackboard.

The technical scheme that its technical problem that solves the utility model adopts is: by chalk locator 1, sucker 2, the movable compass leg 3 of band rule, the band rule is compass leg 4 fixedly, joystick 5, arc-shaped slide rail 6, magnetic disk 7, protractor 8 and rotating disk 9 are formed, it is characterized in that: described a kind of scale protractor, mainly be to be constituted by compasses and protractor, chalk locator 1 is installed on the movable compass leg 3 of band rule, perspex steel protractor 8 and band rule fixedly compass leg 4 be fixed together, magnetic disk 7 is implanted in perspex steel protractor 8 inside, and the movable compass legs of joystick 5 control band rules are finished the accurate angle of angulation having arc-shaped slide rail 6 under movable disk 9 rotates.

The beneficial effects of the utility model are: being convenient for carrying use is that the scale protractor manufactured materials that can inhale on blackboard is originated extensively, and cost is low, and is simple in structure, is convenient to make, and practical, the application market amount is big, and there are great returns of investment the side of practicing midwifery.

For remedy some measurer in the use unicity and carry and take care of on the use inconvenience, this product has simple in structure, the modern design uniqueness, reasonable in design, have flexibility and comprehensive practical value in the use, realize multi-use, thereby increased work efficiency, embodied social benefit again.

Therefore the present invention has following advantage: the school of the overwhelming majority is all also using traditional wooden teaching appliance (comprising wooden educational compasses, wooden set square etc.) at present.Though the unit price of this series products is cheap, but damage easily, general school uses an academic year, even halves just needs to change very waste.

So, this novel multifunctional educational compasses set square just base design therewith:

Than function: no matter compasses, ellipsograph, set square, protractor, ruler, even the function of teacher's pointer are primary schools, junior middle school, or senior middle school, and buy a cover multifunctional compass and be equivalent to buy 6 teaching aids, it is convenient, powerful to save, from unopposed.

Specific mass: the quality of common wood-based product is needless to say more, and school used all to be known, often falls on the ground because of carelessness just to have dissipated, and is very easy to bad.But adopt superpower plastics to make, falls test through anti-, so long as not wanting intentionally it is broken, at will fall definitely fall not bad.

This scale angle gage structure is simple, and is easy to make, popularizes use easily.

Description of drawings

Fig. 1: be schematic perspective view of the present utility model.

Fig. 2: be structural representation of the present utility model.

Among the figure: by 1, the chalk locator, 2, sucker, 3, the movable compass leg of band rule, 4, the fixing compass leg of band rule, 5, joystick, 6, arc-shaped slide rail, 7, the magnetic disk, 8, protractor, 9, rotating disk.

The specific embodiment

Embodiment: with reference to shown in Figure 1, described a kind of scale protractor, mainly be to be constituted by compasses and protractor, chalk locator 1 is installed on the movable compass leg 3 of band rule, perspex steel protractor 8 and band rule fixedly compass leg 4 be fixed together, magnetic disk 7 is implanted in perspex steel protractor 8 inside, and the movable compass legs of joystick 5 control band rules are finished the accurate angle of angulation having arc-shaped slide rail 6 under movable disk 9 rotates.Also can load onto chalk at the chalk locator, under the drive of joystick 5 along arc-shaped slide rail to a sideway swivel, need picture bowlder radius of a circle with angular dimension control, two leg open angles that have a rule 180 degree the time can make ruler and use." doing line segment and angle with ruler " is a learning content after " conditions of the feature of parallel lines and exploration parallel lines ", plays a part to form a connecting link in the chronological order of this chapter teaching material.This class is introduced teaching to concrete life situation, allows the student experience the close ties of mathematics and daily life, and the realistic meaning that a line segment equals known line segment is made in impression simultaneously.Do the activity of beautiful pattern by ruler, cultivate student's aesthetic consciousness, allow them in study, know from experience MATHEMATICAL AESTHETICS and how much U.S.s, the more important thing is the space that further develops the student, form the good habit of Research Learning, for the study of follow-up chapters and sections lays the first stone.Because seven classmans are in thinking in images to the period of abstract thinking transition, have stronger curiosity, aspiration to knowledge, mutual enthusiasm of puing question to cooperate with each other between the student also than higher, they have possessed the ability that certain conclusion is summed up and expressed simultaneously, and have the aesthetic conceptions of oneself, so they should be than higher for the enthusiasm of study construction with ruler and compasses.

Based on above analysis, the design philosophy of this class is: the student plays an active part in teachers organization, under guiding, coaching, and is diligent in starting, and really in the process of independently probing into cooperation and exchange effectively understands and grasps knowledge.

Can arbitrarily draw angle, measuring angle, picture vertical line, parallel lines, survey gradient, perpendicularity, levelness, can work as inside and outside right angle and turn chi, open, close up, can work as the length ruler and can also more intuitively read, and the circle of the given size of drawing.Product can be made three types: the small-sized stationery of A (main material is plastics) is useful for pupils and students; Type B teaching aid (main material is plastics) is useful for school teacher; C type instrument (main material is stainless steel metal) is useful for factory, workshop, carpenter, skilled worker, mechanic etc.As: teacher, pupils and students' doing mathematics, geometry and little making or mechanic measure to draw, need carry when making protractor, set square, ruler, compasses and workman with horizon rule, turn chi, estimate above-mentioned measurer such as table.For remedy above-mentioned measurer in the use unicity and carry and take care of the inconvenience of using.That this product has is simple in structure, modern design is unique, and is reasonable in design, very flexible in use, has comprehensive practical value, realized multi-use, thereby improves working efficiency.This scale angle gage structure is simple, and is easy to make, popularizes use easily.

Above-described embodiment is the utility model preferred implementation, but embodiment of the present utility model is not restricted to the described embodiments, and the utility model not part of detailed description is known technology.

Claims (1)

1. scale protractor, by chalk locator (1), sucker (2), the movable compass leg (3) of band rule, the band rule is compass leg (4) fixedly, joystick (5), arc-shaped slide rail (6), magnetic disk (7), protractor (8) and rotating disk (9) are formed, it is characterized in that: described a kind of scale protractor, mainly be to be constituted by compasses and protractor, chalk locator (1) is installed on the band movable compass leg of rule (3), perspex steel protractor (8) and the band rule fixedly compass leg (4) be fixed together, magnetic disk (7) is implanted in perspex steel protractor (8) inside, and the movable compass leg of joystick (5) control band rule rotates the accurate angle of finishing angulation having arc-shaped slide rail (6) at movable disk (9).

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