CN2504089Y

CN2504089Y - Novel vernier compasses

Info

Publication number: CN2504089Y
Application number: CN 01263687
Authority: CN
Inventors: 武湖月
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-31
Filing date: 2001-10-31
Publication date: 2002-08-07
Anticipated expiration: 2011-10-31

Abstract

The utility model relates to a novel vernier bow compass, and consists of the axis of a circle center and a rotating axis that are connected mutually vertically. The utility model is characterized in that the rotating axis consists of a clipping groove board (16) and a vernier ruler (14), and the clipping groove board and the vernier ruler are connected in an inserted way. The vernier ruler (14) passes through the section between a gourd seat (9) of the axis of the circle center and the clipping groove board (16), and the teeth on the edge of the vernier ruler (14) mesh the vernier regulation cam (11) on the clipping groove board (16). The vernier ruler (14) can be leaded to move horizontally in the clipping groove of the clipping groove board (16) by toggling the vernier regulation cam (11), an automatic reposition lead tip (15) arranged on the vernier ruler (14) is guaranteed to be parallel to the needle of the circle center (10) and a measurement-displaying window (8) for displaying the scales of the vernier ruler is arranged on the gourd seat (9). The structure of the vernier bow compass is scientifically reformed based upon the theories of parallelism and perpendicular, and has scientific structure, high accuracy, perfect function and extensive application. The utility model itself can ascertain the accurate radius and efficiently eliminate the mutual restrictions between auxiliary stationery as well as subtle changes and possible inaccuracies in the course of application.

Description

Novel Vernier compasses

(1) technical field

The utility model relates to a kind of science and education stationery, industry circle is made and detected utensil, specifically a kind of accurate Vernier compasses of of many uses, perfect in shape and function.

(2) background technology

At present, the precision drawing auxiliary equipment compasses of uses such as compasses that the student generally uses and scientific research are drawn, open-air mapping all are " people " font structures, the angle becomes the sequential impermanence, can not determine the radius distance, in use, only abide by the rule of rounding, the rule of the circle of not observing the prescribed period of mourning for one's deceased parent, drawn circle has rule not have rule, clockwisely must not overlap, reverse and can not kiss.When the fork angle is big more, become above 45 ° with the angle of entry, the center of circle loses uniqueness; Increase slightly along with plumbous head tiltedly decreases drawn circular arc lines, radius reduces.As seen, there are many drawbacks such as unreasonable structure, accuracy be low in " people " font compasses.

(3) summary of the invention

The purpose of this utility model is the novel Vernier compasses that a kind of scientific structure, accuracy height is provided, self can determines accurate radius.This Vernier compasses comprises circle core shaft and rotating shaft two large divisions, circle core shaft is connected with rotating shaft is orthogonal, rotating shaft is pegged graft by draw-in groove plate and vernier scale and is formed, vernier scale passes between the cucurbit seat of circle core shaft and draw-in groove plate, fine setting cam meshing on teeth on the vernier scale edge and the draw-in groove plate closes, stirring the fine setting cam can make vernier scale move horizontally in the draw-in groove of draw-in groove plate, reset plumbous and the center of circle pin that is provided with on the corresponding scale of vernier scale guaranteed parallel, and what have demonstration vernier scale scale on the cucurbit seat shows the meter window.This novel Vernier compasses is used the student structure of the auxiliary equipment compasses of compasses and scientific research and design special use and is carried out the science reorganization according to parallel and vertical principle, remedy original all compasses and self can not determine the defective of effective radius and the limitation of self specification, get rid of little change that takes place usually in all application processes and the error that may cause thereof; Simplify unnecessary spare and accessory parts, increased compasses due functions itself and its extensive use is worth, be implemented in accurately absolute in the decimillimeter unit.

(4) description of drawings

Fig. 1 is the monnolithic case figure of novel Vernier compasses;

Fig. 2 is the frame diagram of novel Vernier compasses;

Fig. 3 is the main part figure of novel Vernier compasses as the slide calliper rule utilization;

Fig. 4 is novel Vernier compasses collapsed shape figure.

(5) specific implementation

Among the figure: the 1-block; 2-stores tube; The meticulous carbon pen of 3-; 4-cap for brush screw; 5-cap for brush deck; 6-carries buckle; The 7-screw; The 8-scale shows the meter window; 9-cucurbit seat; 10-center of circle pin; 11-finely tunes cam; 12-acute angle right angle is to the line plate; The 13-protractor; The 14-vernier scale; The 15-plumbous head that automatically resets; 16-draw-in groove plate.

As shown in Figures 1 to 4, the novel Vernier compasses that the utility model provides comprises circle core shaft and rotating shaft two large divisions, and circle core shaft and rotating shaft are orthogonal.Circle core shaft is made up of the cucurbit seat 9 of meticulous carbon pen 3 and center of circle pin 10, have on the cucurbit seat 9 show vernier scale 14 scales show meter window 8, the penholder of meticulous carbon pen 3 is storage tubes 2, in equipment with the automatically reset vernier scale 14 of plumbous 15 and prolongation of polychrome, block 1 is threaded onto the tail end of storage tube 2, meticulous carbon pen 3 and cap for brush deck 5 usefulness cap for brush screws 4 are connected as sleeve pipe, cap for brush deck 5 is provided with and carries buckle 6, carry screw 7 on the buckle 6 and be vertical fastening effect, it can make meticulous carbon pen 3 and cap for brush deck 5 form a whole circle core shaft, and wherein cap for brush deck 5 is the folding hinges that connect circle core shaft and rotating shaft.Rotating shaft is pegged graft with vernier scale 14 by draw-in groove plate 16 and is formed, draw-in groove plate 16 is provided with the acute angle right angle to line plate 12 and protractor 13, the draw-in groove part of draw-in groove plate 16 can prolong, its prolongation can connect with hinge, vernier scale 14 passes between the cucurbit seat 9 of circle core shaft and draw-in groove plate 18, teeth on vernier scale 14 edges are meshed with fine setting cam 11 on the draw-in groove plate 16, stir fine setting cam 11 gently, vernier scale 14 is moved horizontally in the draw-in groove of draw-in groove plate 16, vernier scale 14 also can prolong, its prolongation can join with primary and secondary fourth of the twelve Earthly Branches button, each centimeters of the bottom surface of vernier scale 14 has an eye, be used for screwing in and automatically reset plumbous 15, automatically reset plumbous 15 with circle core shaft cucurbit seat 9 on center of circle pin 10 guarantee parallel.

The Vernier compasses that the utility model provides, its scope of application least radius can reach 0.5 centimetre.Can fold and carry or place writing case as shown in Figure 4 at ordinary times.Need the picture bowlder, earlier circle core shaft and rotating shaft are removed into 90 °, screw the holding screw 7 that carries buckle 6, the block 1 of outwarding winding, the vernier scale 14 of take out automatically reseting of required look kind plumbous 15 and required specification is stirred fine setting cam 11, the vernier scale 14 of required specification is pushed in the draw-in groove of draw-in groove plate 16, automatically reset plumbous 15 at silk eye place, vernier scale 14 bottom screw-in, the fine setting cam 11 of harmonizing again makes scale show that meter window 8 places show required scale, the circle of the required size of can drawing.

When the especially big bowlder of need picture, the primary and secondary fourth of the twelve Earthly Branches of vernier scale 14 and prolongation thereof buckled join, the prolongation of draw-in groove plate 16 is folded in the back side of protractor 13 at ordinary times, it is pulled directly, the vernier scale 14 that snapping is prolonged again, push the draw-in groove of draw-in groove plate 16, at this moment, can draw check round or that justify than long radius according to what you needed.

When needs were drawn lined, grid, form rapidly, the interval according to you need automatically reset plumbous 15 by last several successively, and parallel moving promptly can be drawn some parallel lines for one, and two just can be drawn as several grids.When needs picture concentric circles, one can be drawn as several concentric colorful circles.In addition, also can one be write as several standard word.

Need retouch, when filling in, screw off special-purpose meticulous carbon pen 3 and just can use.The use that screws off 3 pairs of compasses of meticulous carbon pen is unaffected.

If need on crude metallic plate or other hard plate faces picture circles, will automatically reset and unload for plumbous 15, change the diamond pin and get final product.In addition, this Vernier compasses takes down meticulous carbon pen 3 and can also be used as the slide calliper rule of special requirement are tested round goods in order to amount dark, high, long and interior external diameter.

Claims

1, a kind of novel Vernier compasses, comprise circle core shaft and rotating shaft two large divisions, circle core shaft is connected with rotating shaft is orthogonal, it is characterized in that rotating shaft is pegged graft by draw-in groove plate (16) and vernier scale (14) forms, vernier scale (14) passes between the cucurbit seat (9) of circle core shaft and draw-in groove plate (16), teeth on vernier scale (14) edge are meshed with fine setting cam (11) on the draw-in groove plate (16), vernier scale (14) go up to be provided with, and automatically reset plumbous head (15) and center of circle pin (10) guaranteed parallelly, has on the cucurbit seat (9) and shows that showing of vernier scale scale count window (8).

2, novel Vernier compasses according to claim 1, the first half that it is characterized in that above-mentioned cucurbit seat (9) is a meticulous carbon pen (3), the penholder of meticulous carbon pen (3) is a storage tube (2), in equipment with the automatically reset vernier scale (14) of plumbous head (15) and prolongation of polychrome, block (1) is threaded onto the tail end of storage tube (2), meticulous carbon pen (3) is connected as sleeve pipe with cap for brush screw (4) with cap for brush deck (5), cap for brush deck (5) is provided with and carries buckle (6), carry the screw (7) that buckle (6) has been provided with vertical fastening effect, wherein cap for brush deck (5) is the folding hinge that connects circle core shaft and rotating shaft.

3, novel Vernier compasses according to claim 1, it is characterized in that above-mentioned draw-in groove plate (16) is provided with the acute angle right angle to line plate (12) and protractor (13), the draw-in groove part of draw-in groove plate (16) can prolong, its prolongation can connect with hinge, vernier scale (14) also can prolong, and its prolongation can join with primary and secondary fourth of the twelve Earthly Branches button.