CN203391528U

CN203391528U - Multifunctional compasses

Info

Publication number: CN203391528U
Application number: CN201320463840.2U
Authority: CN
Inventors: 黄秋松
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2014-01-15
Anticipated expiration: 2023-07-31

Abstract

The utility model relates to multifunctional compasses which comprise a left rotating arm, a right rotating arm and a compasses head. The left rotating arm and the right rotating arm are hinged through a rotating shaft. A wire reel, a scale wire, a wire column, a wire clip and a right location pin are arranged on the right rotating arm. The scale wire is wound on the wire reel, passes through the wire column and the wire clip and penetrates a slim hole in the bottom of the right location pin to be fixed at the bottom of the left location pin. Traditional compasses are modified, and the multifunctional compasses have the functions of drawing circles and ovals and serving as a protractor and a scale.

Description

A kind of multifunctional compass

Technical field

The utility model relates to a kind of study aid, is specifically related to a kind of compasses that can realize several functions.

Background technology

In the process of study, often need picture circle, draw ellipse, measure length dimension and angle, generally all adopt corresponding instrument, carry inconvenience and affect learning efficiency.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of easy to carry, the compasses that gather multi-function in integral whole.

The technical scheme that the utility model adopts: a kind of multifunctional compass, comprise left-hand rotation arm, right-hand rotation arm and rule head, described left-hand rotation arm and right-hand rotation arm are hinged by rotating shaft; Described right-hand rotation arm is provided with reel, graduation mark, wire column, wire clamp and right pilot pin, and described graduation mark is wrapped on described reel, by described wire column and wire clamp and after passing described right pilot pin bottom pore, extends and is fixed to left pilot pin bottom.

Further, described Gui Tou bottom is semicircle, the center superposition of this semicircular center of circle and described rotating shaft, circumferential edges in the semi-circular portion of described rotating shaft is provided with for measuring the scale of left-hand rotation wall and right-hand rotation wall opening angle, this scale " 0 " degree be positioned at rotating shaft center under, described semicircular diameter limit is vertical with the line of " 0 " scale with the center of described rotating shaft; Described reel is positioned at the position in the middle of described right-hand rotation arm, and described wire column is between described reel and right pilot pin, and described wire clamp is positioned at the bottom of right-hand rotation arm; Described left-hand rotation arm lower end is provided with left pilot pin, Telescopic pencil and Telescopic pencil cover; Described reel periphery is offered stria, and described graduation mark is wrapped in described stria; Described graduation mark, with every 1 millimeter of 1 centimetre of ten kinds of color mark of the dark purple orange white grey black of purple greenish-yellow indigo plant, repeats lower 1 centimetre of above-mentioned color marking; Described graduation mark is controlled elasticity by described wire clamp; Described left-hand rotation arm is provided with length scale.

The beneficial effects of the utility model are: a compasses rule protractor part can take measurement of an angle, the left-hand rotation arm that is carved with length graduation mark can be measured length dimension, rely on graduation mark to draw and determine the circle of radius and the ellipse of definite major axis, minor axis and focal length, one-object-many-purposes, easy to carry, can improve operating efficiency, can also be cost-saving.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation;

Fig. 2 is left-hand rotation arm polycrystalline substance schematic diagram described in the utility model;

Fig. 3 is that the utility model is drawn oval schematic diagram.

In accompanying drawing, the list of parts of each label representative is as follows:

1, rule head, 2, rotating shaft, 3, left-hand rotation arm, 4, Telescopic pencil cover, 5, left pilot pin, 6, flexible pencil, 7, right-hand rotation arm, 8, reel, 9, wire column, 10, wire clamp, 11, right pilot pin, 12, graduation mark.

The specific embodiment

Below in conjunction with accompanying drawing, principle of the present utility model and feature are described, example, only for explaining the utility model, is not intended to limit scope of the present utility model.

As shown in Figure 1, multifunctional compass of the present utility model comprises left-hand rotation arm 3, right-hand rotation arm 7 and rule 1, and described left-hand rotation arm 3 and right-hand rotation arm 7 are hinged by rotating shaft 2; Rule 1 bottom is semicircle, the center superposition of this semicircular center of circle and described rotating shaft 2, circumferential edges in the semi-circular portion of described rotating shaft 2 is provided with for measuring the scale of left-hand rotation wall 3 and right-hand rotation wall 7 opening angles, this scale " 0 " degree be positioned at rotating shaft center under, described semicircular diameter limit is vertical with the line of " 0 " scale with the center of rotating shaft.

Described left-hand rotation arm 3 is provided with length scale, lower end is provided with left pilot pin 5, Telescopic pencil 6 and Telescopic pencil cover 4, described Telescopic pencil 6 is arranged on described Telescopic pencil and overlaps 4 inside, while not using, Telescopic pencil 6 is retracted into Telescopic pencil and overlaps 4 inside, during use state, Telescopic pencil 6 stretches out Telescopic pencil cover 4, for graphing, described right-hand rotation arm 7 is provided with reel 8, graduation mark 12, wire column 9, wire clamp 10 and right pilot pin 11, stria is offered in described reel 8 neighborings, it is positioned at the position in the middle of right-hand rotation arm 7, wire column 9 is between reel 8 and right pilot pin 11, wire clamp 10 is positioned at the bottom of right-hand rotation arm 7, every 1 millimeter of 1 centimetre of ten kinds of color mark of the described graduation mark 12 use dark purple orange white grey black of purple greenish-yellow indigo plant, repeat lower 1 centimetre of above-mentioned color marking, it is wrapped on reel 8, by wire column 9 and wire clamp 10 and after passing right pilot pin bottom pore, extend and be fixed to left pilot pin 5 bottoms, and control elasticity by described wire clamp 10.

When drawing circle, first regulate the length of the Telescopic pencil 6 under left-hand rotation arm 3, flexible pencil 6 nibs are stretched out, and the nib length of stretching out exceed the length of left pilot pin 11, object is to avoid left pilot pin 5 affect pencil drawing to justify.Open left-hand rotation wall 3 and right-hand rotation arm 7, regulate the distance of left pilot pin 4 and right pilot pin 11, be with graduated graduation mark 12 can read its distance, the distance that graduation mark 12 is read is equated with the radius of circle of required picture, with the right pilot pin 11Wei center of circle, draw circle, obtain required circle.

Draw the oval upper any point of oval main application to bifocal distance and equal principle.Below with elliptic equation this ellipse for the known major axis of example be 10, minor axis is 6, focal length is 8.Shrink flexible pencil 6 and get back to flexible point protector 4 inside, the height of left pilot pin 5 surpasses the height of flexible point protector, open left-hand rotation arm 3 and right-hand rotation arm 7, making graduation mark 12 length is 10, and part is shunk left-hand rotation arm 3 and right-hand rotation arm 7, and the spacing that makes left pilot pin 5 and right pilot pin 11 is 8, as shown in Figure 3, fixing compasses, outwards strain graduation mark 12 and along graduation mark 12, around compasses, draw that moving once week, can to obtain major axis be 10 with an other pencil, the ellipse that minor axis is 6.

Napier's compasses left-hand rotation arm 3 and right-hand rotation arm 7 overlap with wanting the both sides of angle measurement, and two inner arms are institute's angle measurement angle in scale sum corresponding to rule 1 part.

Napier's compasses left arm 3 has been provided with length scale, can directly measure the length dimension that will survey.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a multifunctional compass, comprises left-hand rotation arm, right-hand rotation arm and rule head, and described left-hand rotation arm and right-hand rotation arm are hinged by rotating shaft; Described right-hand rotation arm is provided with reel, graduation mark, wire column, wire clamp and right pilot pin; Described graduation mark is wrapped on described reel, by described wire column and wire clamp and after passing described right pilot pin bottom pore, extends and is fixed to left pilot pin bottom.

2. multifunctional compass according to claim 1, it is characterized in that: described Gui Tou bottom is for semicircle, the center superposition of this semicircular center of circle and described rotating shaft, circumferential edges in the semi-circular portion of described rotating shaft is provided with for measuring the scale of left-hand rotation wall and right-hand rotation wall opening angle, this scale " 0 " degree be positioned at rotating shaft center under, described semicircular diameter limit is vertical with the line of " 0 " scale with the center of described rotating shaft.

3. multifunctional compass according to claim 1, is characterized in that: described reel is positioned at the position in the middle of described right-hand rotation arm, and described wire column is between described reel and right pilot pin, and described wire clamp is positioned at the bottom of right-hand rotation arm.

4. multifunctional compass according to claim 1, is characterized in that: described left-hand rotation arm lower end is provided with left pilot pin, Telescopic pencil and Telescopic pencil cover.

5. multifunctional compass according to claim 1, is characterized in that: described reel periphery is offered stria, and described graduation mark is wrapped in described stria.

6. multifunctional compass according to claim 1, is characterized in that: described graduation mark, with every 1 millimeter of 1 centimetre of ten kinds of color mark of the dark purple orange white grey black of purple greenish-yellow indigo plant, repeats lower 1 centimetre of above-mentioned color marking.

7. according to the arbitrary described multifunctional compass of claim 1-6, it is characterized in that: described graduation mark is controlled elasticity by described wire clamp.

8. according to the arbitrary described multifunctional compass of claim 1-6, it is characterized in that: described left-hand rotation arm is provided with length scale.