CN2379324Y

CN2379324Y - Miniature appliance for measuring angle

Info

Publication number: CN2379324Y
Application number: CN 99213239
Authority: CN
Inventors: 李富饶
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-15
Filing date: 1999-06-15
Publication date: 2000-05-24
Anticipated expiration: 2009-06-15

Abstract

The utility model relates to a miniature appliance for measuring angles, which is composed of two circular discs hinged together and main ruler scales and auxiliary ruler scales on the hinged surfaces of the two circular discs. The division value of the utility model is 1 DEG or 1/2 DEG, the angular measurement range is from 0 to 180 DEG and the diameter can be within the range of 2 cm. Moreover, the ruler surface is compact and the scales are striking and are easy to read. The utility model can be ideally combined with a pair of compasses and a graduated scale into a whole for use together. If applied to other measuring implements, the utility model also has the advantage of peculiarity.

Description

Miniature protractor

The utility model is a kind of miniature protractor.

Common compasses look it is the image at an angle.In decades, once there were many people coincidentally to imagine both at home and abroad protractor was combined with compasses, wished that compasses had the function of protractor.But really realize this hope and be not easy.Because concerning compasses, the protractor volume of arranging 181 graduation marks is too big, and it can hinder compasses to use neatly.If protractor is dwindled, also disappointing---one of graduation mark is close to one, and is close and numerous, is difficult to differentiate; Reduce graduation mark and then equal to remove due scale division value, lose real protractor function.

In order to address this problem, Chinese invention patent has proposed " vernier type multipurpose drafting instrument " No. 881069205.This plotter is to establish the vernier protractor of angle between an expression compass leg in the hinged place of two chi formula compass legs, by two disks of compass leg hinged place respectively as the main scale and the secondary chi of vernier protractor.Owing to adopt the vernier mode to represent angle, the volume of angulation part has been dwindled significantly, but still have due scale division value of common protractor (1 degree or 1/2 degree) and angulation scope (0～180 degree).

But as the protractor on the compasses, its volume is more little just good more, and the angulation part of " vernier type multipurpose drafting instrument " then is difficult to further dwindle.

The purpose of this utility model provide a kind of volume littler can be applicable to miniature protractor on compasses, folding chi and other measurer.

The purpose of this utility model is achieved in that miniature protractor is made up of the major and minor chi scale on hinged two disks and two disks hinged, its scale division value is 1 degree or 1/2 degree, the disk of making secondary chi is by the transparent material manufacturing, on main scale, it is characterized in that, the reference circle at secondary chi reading place overlaps mutually with the reference circle at main scale reading place, and the position at the secondary chi reading place masked film that has one deck to cover following main scale reading.Like this, because secondary chi reading can overlap on the main scale reading, secondary chi reading does not upwards occupy in the footpath of disk, so the diameter of protractor can be smaller.

On the secondary chi of miniature protractor, removing between especially per two graduation marks of head also to have a masked film, and this film makes secondary chi except that only obviously exposing a main scale graduation mark between especially per two graduation marks of head.Like this, the graduation mark that must discern on the chi face has reduced, not only recognition easily, and also the chi face is succinct.This external secondary chi does not have the scale position also can have masked film that following main scale scale is covered, thereby makes the chi face more succinct, can stamp ornamental icon etc. in the above.

Positive each the graduated position of secondary chi disk can also be the convex lens that can play amplification, can amplify following major and minor chi graduation mark and reading, simultaneously because the optically focused effect of convex lens has the scale place especially bright, eye-catching readability below making.Like this, major and minor chi graduation mark and reading can be shorter and smaller, and the diameter of protractor can further dwindle.

Because adopt such scheme, the diameter of miniature protractor can be as small as in the 2cm, still have the scale division value of 1 degree or 1/2 degree and the angulation scope of 0～180 degree, and the chi face is succinct, the eye-catching readability of scale.It can be combined as a whole with compasses and rule very ideally, makes the three become same inseparable thing.If it is applied on other measurer, has unique advantage equally.

Make specific description below in conjunction with accompanying drawing

Fig. 1 and Fig. 2 are first kind of embodiment schematic diagrames.

Fig. 3 and Fig. 4 are second kind of embodiment schematic diagrames.

Fig. 5, Fig. 6 and Fig. 7 are the third embodiment schematic diagrames.

The masked film that oblique lattice in the accompanying drawing and grid representation are made of printing-ink.

With reference to Fig. 1, the every lattice of main scale graduation mark of miniature protractor are 10 degree, totally 36 lattice.Graduation mark and reading are imprinted on positive hinged.

Fig. 2 is secondary chi, and by the transparent material manufacturing, its graduation mark and reading at first are imprinted on hinged of reverse side, and then stamp light color inks, form needed masked film.The every big lattice of secondary chi are 19 degree, totally 10 big lattice.Secondary chi one big lattice and main scale two lattice differ 1 degree, with numeral " 1 " expression; Secondary chi two big lattice and main scale four lattice differ 2 degree, with numeral " 2 " expression ..., numeral " 1,2,3 ... 9 " be the individual place reading of angle.Have a down scale, secondary chi one little lattice and main scale one lattice to differ 1/2 degree in the middle of the every big lattice of secondary chi, promptly the scale division value of protractor is 1/2 degree.

As can be seen, secondary chi reading overlaps on the main scale reading from the figure of Fig. 1 and Fig. 2 and back.For the ease of distinguishing major and minor chi scale, major and minor chi scale can be printed as two kinds of colors, for example redness and black.

As two disks of main scale and secondary chi, can adopt multi-form hingedly as required, the axle riveted joint of centre bore is for example arranged with an axle or one; Perhaps hinged with the transparent axle that central point or center " ten " word are arranged; Perhaps use bolt, nut hinged.The core of two disks can adopt the convex cone concave cone to cooperate to improve concentricity, loads onto jointed shaft then.

Secondary chi in the main scale among Fig. 1 and Fig. 3 is combined, promptly is second kind of embodiment shown in Figure 4.In order to keep visual balance, the first lattice of secondary chi are made as 29 degree, all the other every lattice 19 degree, 10 lattice (no matter the every lattice of secondary chi are 9 degree, 19 degree, 29 degree, still use with for three kinds, and the scale difference of major and minor chi is all identical, can both form the such scale division value of 1 degree) altogether.As can be seen from Figure 4, the masked film between per two graduation marks of secondary chi has hidden a part of graduation mark of main scale, and the graduation mark that must discern on the chi face has only 20, easily recognition.And whole protractor has only 46 graduation marks altogether, just can 181 number of degrees in 0～180 degree all be showed, and does not need the number graduation mark.

In the third embodiment, Fig. 5 is a main scale, and Fig. 6 is secondary chi, and there are 10 protruding spheres in secondary chi disk front, forms 10 little magnifying glasses, and following graduation mark and reading are exaggerated, illuminate, easier recognition.In order to make secondary chi front composition more terse, the facing figure and can be processed into fan-shaped of little magnifying glass.

In Fig. 7, secondary chi start index is between main scale 30 degree and 40 degree, and secondary chi scale 6 aligns with the main scale graduation mark, i.e. 36 degree.

Claims

1. miniature protractor, form by the major and minor chi scale on hinged two disks and two disks hinged, its scale division value is 1 degree or 1/2 degree, the disk of making secondary chi is by the transparent material manufacturing, on main scale, it is characterized in that the reference circle at secondary chi reading place overlaps mutually with the reference circle at main scale reading place, and the position at the secondary chi reading place masked film that has one deck to cover following main scale reading.

2. the described miniature protractor of claim 1 is characterized in that, secondary chi removes between especially per two graduation marks of head all a masked film, and this film makes secondary chi except that only obviously exposing a main scale graduation mark between especially per two graduation marks of head.

3. claim 1 or 2 described miniature protractors is characterized in that, positive each the graduated position of secondary chi disk all is the convex lens that can play amplification.