CN2166976Y - Multi-purpose compass for drawing for teacher use - Google Patents

Abstract

The utility model relates to a multi-purpose compass for drawing for teacher use. The utility model solves the shortage that the teaching drawing aid is single and independent, each teaching drawing aid is carried one by one according to the requirement when teachers have a lesson, and different drawing aids are changed according to the graph lines to be drawn when the teaching drawing aids are used. The utility model is characterized in that dimension graduation 5 are labeled on two rotating feet 1, 4. The center of the connecting portion of the lower rotating foot 1 is labeled with a protractor 7 in 360 DEG, and a pointer 3 for indicating angle is respectively labeled on the center of the connecting portion of the transparent rotating foot 4 and the protractor 7 aligning to 'zero' arranged on the lower rotating foot 1. The multi-purpose compass for drawing for teacher use can be used for teaching and charting, and can be used for drawing lines, circles, angles and measuring angles. The utility model has the advantages of convenient portability and preservation, convenience and practicality.

Description

Multi-purpose compass for drawing for teacher use

The utility model relates to a kind of drawing advises, particularly a kind of picture straight line, picture circle, picture angle of both can being used for, and the teaching that can measure length again, takes measurement of an angle is advised with the multipurpose drawing.

Teaching drafting instrument of the prior art is independently single, and promptly compasses are drawn circle, and length is surveyed in the ruler setting-out, and protractor takes measurement of an angle.Their appearance provides drafting instrument comparatively easily for teachers' instruction.But its weak point is that owing to be independently single, last class hour teacher need be with one by one, and is very inconvenient.In use according to the difference of made pattern line, need change corresponding drafting instrument at any time in addition, also make troubles.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and one kind of multiple functional unifications are provided, and the teaching that need not to change at any time corresponding drafting instrument during use is with multipurpose drawing rule.

Technical solution of the present utility model is: be marked with size scale 5 at two rotation pin 1,4, be used to measure length, draw straight line, these two rotations pin, 1,4 coupling parts are transparent material, indicate one 360 tolerance hornworks 7 at the center, coupling part that rotates pin 1 down, " zero " indicated the pointer 3 of an indication angle at the center, coupling part and the 360 tolerance hornworks 7 on the following rotation pin 1 of last rotation pin 4.Except that can drawing 360 degree circles, also can draw angle like this, take measurement of an angle, reach the purpose of this utility model.

The utility model has following advantage compared to existing technology:

1, can be used for the picture straight line, draw circle, survey length, angle measurement degree, " one-machine-multi-function ", having exempted teachers' instruction will be simultaneously with the worry that goes up set square, compasses, protractor.

Need not to change other drawing instrument when 2, using.Being easy to carry, preserving, is a kind of very convenient, practical new teaching drawing apparatus.

The drawing of accompanying drawing is described as follows:

Fig. 1 is an overall structure schematic diagram of the present utility model.Wherein 1 is the following rotation pin of one of two rotation pin, 2 for connecting the headless screw that rotates pin up and down, 3 is the pointer of the indication angle on the last rotation pin 4, and 5 for rotating the size scale on the pin up and down, and 6 for rotating up and down on the pin in order to connect the tenon of chalk and center of circle thimble.

Fig. 2 is for rotating the overall structure schematic diagram of pin 1 down.Wherein 7 is 360 tolerance hornworks.

The utility model is described in further detail below in conjunction with accompanying drawing and embodiment: have tenon 6 and the same end that indicates the upper and lower rotation pin 4,1 of size scale 5 on it, by being connected with its screw that flushes 2, the bonding pad of going up rotation pin 4 at least is transparent on every side.At the center, coupling part that rotates pin 1 down, indicate 1 and measure hornworks 7, measure hornworks 7 to " zero " at the center, coupling part of last rotation pin 4 with rotating 360 on the pin 1 down, indicate the pointer 3 of an indication angle.Like this, with required angle on the pointer 3 amount of alignment hornworks 7, this angle of can drawing and taking measurement of an angle; Utilize 6, one of two tenons to make axle, draw a circle for one, get final product the picture circle; Utilize two rotation pin 1,4, get final product the picture straight line, amount length.Can use for the teaching drawing.

Claims (1)

1, a kind of teaching is advised with the multipurpose drawing, upper and lower rotation pin has tenon (6) on (4,1), it is characterized in that, the same end of upper and lower rotation pin (4,1) with size scale (5) is by being connected with its screw that flushes (2), the bonding pad of going up rotation pin (4) at least is transparent on every side, at the center, coupling part that rotates pin (1) down, indicate one 360 tolerance hornworks (7), measure hornworks (7) to " zero " at the center, coupling part of last rotation pin (4) with rotating 360 on the pin (1) down, indicate the pointer (3) of an indication angle.

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