CN2340040Y

CN2340040Y - Vernier type multifunction teaching ruler

Info

Publication number: CN2340040Y
Application number: CN 98237871
Authority: CN
Inventors: 康福震; 张佐兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-06
Filing date: 1998-06-06
Publication date: 1999-09-22
Anticipated expiration: 2008-06-06

Abstract

The utility model relates to a teaching ruler, which is composed of general drawing instruments, such as a straight ruler, a protractor, etc. The utility model is characterized in that a vernier is sheathed on the straight ruler, and the upper end of the vernier is provided with a protractor and a shaft of the center of a circle. One end of the straight ruler is provided with a pen ring. The vernier type multifunction teaching ruler can be used for drawing various geometrical figures, such as straight lines, angles, circles, arcs, triangles, quadrangles, etc., and has the advantages of reasonable design, simple structure, flexible and convenient use, and multi-function of one ruler.

Description

The cursor type multifunctional teaching ruler

The utility model belongs to a kind of drawing geometric figures instrument that classroom instruction is used.

The course that has must be explained in conjunction with figure in when teaching, so teacher saying class hour, draw geometric figure on blackboard, in order to draw more accurately, must use drawing tools.Present used drawing instrument, its function singleness is so teacher is at school the time, will be for several instruments such as set square, compasses, volume is big, number of packages is many, carries, uses all inconvenient, if being the compass foot of glass, also can't fix blackboard for education, therefore the teacher who has does not want to take the trouble, and just uses no or little drawing instrument, and the randomness of drawing is big, figure is inaccurate, intuitive is poor, has influenced the understanding of student to teaching material, is unfavorable for the raising of quality of instruction.

The purpose of this utility model is that design is a kind of simple in structure, multiple functional, carries, cursor type multifunctional teaching ruler easy to use.

The utility model cursor type multifunctional teaching ruler is made up of ruler and protractor, it is characterized in that being with on ruler vernier, in the upper end of vernier protractor and circle core shaft is installed; End at ruler is fixed with the pen ring.

Be described further below in conjunction with accompanying drawing.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the rear view of vernier;

Fig. 3 is the structural representation of circle core shaft;

Fig. 4 is the binding synoptic diagram of vernier and protractor.

Vernier 1 is annular, and there is " V " shape opening the front, in its bottom jackscrew 7 is housed, amount Near the lower limb of hornwork 2 middle part and the upper end of vernier 1 admittedly together, in vernier 1 upper end The center has circular hole 8, and the lower end of circle core shaft 4 is fixed with soft materials 6, pointer 5 and circle core shaft 4 Be fixedly connected with, behind circle core shaft 4 patchholes 8, pointer 5 can be with axle 4 along protractor 2 planar slides.

The utility model can be made drafting instrument as circle core shaft and pen ring are improved a little.

The utility model has the following advantages than prior art:

The utility model is with many drawing instruments commonly used such as existing ruler, protractors, combine dexterously, just produced multiple function, can draw, measure the angle of any size, circle, the circular arc of the various radius length of drawing again, also can draw various triangles, quadrilateral figures, have reasonable in design, simple in structure, in light weight, volume is little, easy to use flexibly, a tool such as uses at characteristics more.

Now lift an example, and be illustrated in conjunction with the accompanying drawings:

According to technique scheme, the inventor has manufactured experimently a cursor type multifunctional teaching ruler, ruler 3 long 400mm, vernier 1, pointer 5 and pen ring 9 usefulness scale coppers are made, amount transparent hornwork 2 is used adhesive bond with vernier 1, circle core shaft 4 is a plastic production, and the lower end is fixed with rubber, and the course of work now is described: draw bowlder, adjust a circle core shaft 4 and a distance of ring 9 central points, be that radius of a circle is long, it is fixing to tighten jackscrew 7 then, and pointer 5 is close to ruler 3 on one side, it is motionless that hand is pressed circle core shaft 4, the another hand inserts the pen cap 9 with chalk, and ruler 3 is changeed around circle core shaft 4, and arc or circle promptly draw, and can conveniently see the angle of 5 on ruler 3 and pointer, utilize the corner relation equally, triangle easily can draw, the quadrilateral figures, convenient, flexibly, be suitable for.

Claims

1, a kind of cursor type multifunctional teaching ruler is made up of ruler (3) and protractor (2), it is characterized in that being with on ruler (3) vernier (1), and protractor (2) and circle core shaft (4) are installed in the upper end of vernier (1); The fixing pen ring of an end (9) at ruler (3).

2, according to the described teaching chi of claim 1, it is characterized in that vernier (1) is annular, there is " V " shape opening the front, in its bottom jackscrew (7) is housed, near the lower limb of protractor (2) middle part and vernier (1) upper end are fixed together, and have circular hole (8) at the center of vernier (1) upper end.

3, according to the described teaching chi of claim 1, the lower end that it is characterized in that circle core shaft (4) is fixed with soft materials (6), pointer (5) is fixedlyed connected with circle core shaft (4), and behind circle core shaft (4) patchhole (8), pointer (5) can be with axle (4) along protractor (2) planar slide.