CN2070251U - Multi-purpose rule for maths - Google Patents

Abstract

The utility model relates to a multi-purpose rule for maths; holes are evenly arranged on a main rule according to graduation, and a line drawing penetrates the upright holes arranged at both ends of the main rule; both ends of the line drawing is provided with a drawing needle, and the line drawing is provided with a drawing ring; one end of the drawing needle can fix a chalk, and the other end can be tightly inserted in the hole of the main rule body. The main rule is provided with a protractor that matches with a heavy needle to indicate the angle of the main rule body; the main rule is provided with a suction cup that conveniently fixes the ruler on a blackboard or a drawing board. The multi-purpose rule can conveniently draw various ellipses, circles, horizontal lines, heavy straight-lines, fixed angles, internal bisectors, etc.

Description

Multi-purpose rule for maths

The utility model relates to a kind of teaching multipurpose ruler, is applicable to the mapping of blackboard or chart board.

Existing teaching uses the blackboard drawing tool such as set square, ruler, protractor, compasses etc., because its function is more single, teaching is drawn needs the long period, more particularly as ellipse or complex figure, also need multiple instrument to cooperate, this has just demonstrated the deficiency of above-mentioned existing drawing tool.

The purpose of this utility model is that a kind of teaching mapping all-purpose instrument will be provided, provide a kind of teaching multipurpose ruler specifically, has multiple drawing function on the chi, only use a chi just can make things convenient for and promptly draw various figures such as comprising ellipse, parallel lines, angular bisector, thereby overcome the deficiency that has drawing tool now.

Realize that the purpose of this utility model adopts following measure.Be provided with the protractor that to indicate main scale body heeling condition automatically on one's body at graduated main scale, so just can draw such as parallel lines figure such as angular bisector easily.Main scale by the even porose solid drawing with coloured chalk pin that is used for inserting of scale, has setting-out to pass main scale body two ends vertical core on one's body, and two lies in the drawing with coloured chalk pin.The other end at the drawing with coloured chalk pin has the cover of inserting solid chalk, and in the different on one's body illustration hole of main scale, the chalk on promptly available another drawing with coloured chalk pin is the circle of center of circle different radii with this main scale end vertical core by conversion one drawing with coloured chalk pin.Be installed with the picture ring in setting-out, can also can between drawing with coloured chalk pin and vertical core chalk sleeve be being drawn on the ring between main scale body two vertical cores, the slotting maintenance of conversion two drawing with coloured chalk pins is put the various ellipses that just can draw.Be convenient mapping, carry on the body at main scale and fixator is set chi can be fixed on blackboard or the chart board easily that fixator can be a rubber sucker.

The drawing of accompanying drawing is described as follows: Fig. 1 is a schematic diagram of the present utility model, (1) main scale body wherein, and (2) hole, (3) vertical core, (4) drawing with coloured chalk pin, (5) setting-out, (6) draw ring, (7) protractor, (8) pointer, (9) sucker.

Below by embodiment: in conjunction with the accompanying drawings the utility model is further described.

The available plastics of main scale body (1), bamboo and wood etc. are made, and the size in the hole (2) on the main scale body (1) makes drawing with coloured chalk pin (4) can conveniently take out and insert solid.Sucker (9) adopts rubber suction cups, multipurpose ruler is adsorbed on blackboard or the chart board easily, pointer (8) adopts Chong Chung pin, it can be along its free turn of axle at protractor (7) center, make vertical all the time use level hornwork (7) indication of pointer (8) main scale body (1) heeling condition by gravity in use, in setting-out (5), there are two plastics to draw ring (6), one between two vertical cores (3), one between vertical core (3) and drawing with coloured chalk pin (4), the slotting maintenance of conversion two drawing with coloured chalk pins (4) is put during use, and chalk is placed in the different ellipse that can draw in the picture ring (6).

The utlity model has simple in structure, the characteristics such as a chi is multiplex, and is easy to use.

Claims (5)

1, the teaching multipurpose ruler comprises graduated main scale body, it is characterized in that main scale is evenly porose by scale on one's body, and there is vertical core at main scale body two ends, and there is the picture pin at the two ends of passing the vertical core setting-out, and the picture ring is arranged in the setting-out; Main scale has the protractor of indication main scale body heeling condition on one's body, and carrying face on the body at main scale has fixator.

2, chi as claimed in claim 1, an end that it is characterized in that the picture pin is the powder device fixedly, and the other end is closely in the patchhole.

3, chi as claimed in claim 1 is characterized in that having two to draw ring, one between two vertical cores, one at vertical core with draw between the pin.

4, chi as claimed in claim 1 is characterized in that protractor center You Chong Chung pin indication main scale body heeling condition.

5, chi as claimed in claim 1, the fixator that it is characterized in that the main scale back side are two rubber suckers.