CN200970975Y

CN200970975Y - Ellipse drawing instrument

Info

Publication number: CN200970975Y
Application number: CN 200620134850
Authority: CN
Inventors: 钟建明
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-30
Filing date: 2006-11-30
Publication date: 2007-11-07
Anticipated expiration: 2016-11-30

Abstract

The utility model relates to an ellipse drawer, which can solve the problem on quickly and accurately drawing ellipse effectively. The technical propose for solving the problem is that a compasses and a track line are contained, a rotation wheel is provided on the outer side surface at the lower part of one leg of the compasses, one end of a track line is winded and arranged on the rotation wheel, two fixing heads on the lower parts of two legs of the compasses are reapectively provided with a track line rotation fixing ring and a track line fixing rotation ring, the track line passes through the track line rotation fixing ring, and the other end is fixed on the track line fixing rotation ring, a sliding drawing pen fixing sleeve is provided on the track line between the two fixing heads, which is applied for holding a pen that can draw an ellipse and other color pens that can draw the ellipse. The utility model is simple in structure, novelty and unique, easy in manufacturing, low in cost, convenient in application, fast in drawing speed, and high in efficiency, which can not only be used as a common compasses, but also can be used to draw the ellipse, thereby the utility model is a multi-functional tool, and makes the best use of everything, the prior ellipse drawer can not compare with the utility model, thereby the popularization of the utility model is both good to the country and to the people.

Description

Ellipse drawing instrument

One, technical field

The utility model relates to a kind of plotter, particularly a kind of ellipse drawing instrument.

Two, background technology

Drawing in engineering design and teaching is matter of frequent occurrence, but when running into picture, mostly be to adopt to paint round instrument, as compasses, fixed point gyroscope etc., but how to draw for ellipse, generally all be to adopt plotter to carry out step by step, the circular arc that draws earlier, another circular arc that draws again smoothly is connected as one two circular arcs, both bothered during drafting, do not guarantee accuracy again, therefore, oval drafting always is the operational difficult problem of technology, for solving oval drafting problem, now existing multiple ellipse drawing equipment and instrument, but its complex structure uses cumbersome, and the cost height, be difficult for producing and the penetration and promotion application.

Three, utility model content

At above-mentioned situation, the purpose of the utility model just provides a kind of ellipse drawing instrument, can effectively solve oval rapid and precise drafting problem, the technical scheme of its solution is, as everybody knows, ellipse is a kind of special shape of circle, so can utilize compasses and oval formula principle, design, in view of the above, its structure of the utility model is, include compasses and trajectory, on the supporting leg bottom lateral surface of compasses swiveling wheel is housed, trajectory one end installs around on swiveling wheel, fixedly rotating ring of trajectory rotation retainer ring and trajectory is housed respectively on the fixed head of two supporting leg bottoms of compasses, trajectory is passed trajectory rotation retainer ring, and the other end is fixed on trajectory fixedly on the rotating ring, and the paintbrush fixed cover of slip is housed on the trajectories between two fixed, be used to adorn and draw oval paintbrush or other can draw oval-shaped look tool, the utility model is simple in structure, and is novel unique, easily manufactures, cost is low, easy to use, plotting speed is fast, the efficient height, both can make common compasses uses, can paint oval usefulness again, one-object-many-purposes is made the best use of everything, be existing ellipse drawing equipment can't compare, apply and benefit the nation and the people.

Four, description of drawings

Fig. 1 is a structural front view of the present utility model.

Fig. 2 is a fundamental diagram of the present utility model.

Five, the specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.

Provide by Fig. 1, the utility model includes compasses and trajectory, on the one supporting leg bottom lateral surface of compasses 1 swiveling wheel 2 is housed, trajectory 4 one ends install around on swiveling wheel 2, fixedly rotating ring 7 of trajectory rotation retainer ring 3 and trajectory is housed respectively on two fixed 6 of two supporting leg bottoms of compasses 1, trajectory 4 is passed trajectory rotation retainer ring 3, and the other end is fixed on trajectory fixedly on the rotating ring 7, and two are equipped with the paintbrush fixed cover 5 of slip calmly on 6 the trajectory.

In order to guarantee result of use and convenient, swiveling wheel 2 is contained in the rotating shaft 9, and rotating shaft 9 is contained on the support 8, and support 8 is fixed on the lateral surface of supporting leg bottom; Swiveling wheel 2 one side leg bottoms are near the outer threading nose 10 that is equipped with of fixed head; Trajectory fixedly rotating ring 7 is the reassembling type rotating ring, and when time spent not or draw bowlder and can remove from fixed 6, the time spent refills, and both convenient, compasses can be used again more; By shown in Figure 2, draw bowlder, two fixed 6 distance is F ₁, F ₂Between distance, its length is 2a, wherein the length of a is a ²=c ²-b ², a length is that oval center of circle O is to fulcrum F in the formula ₂Between distance, OF ₁Between distance equal OF ₂Between distance, D, E on ellipse short shaft y, A, B on transverse x, D, F ₂Between distance C equal distance between OB or OA.

As everyone knows, said ellipse is meant in the plane and two fixed point F ₁, F ₂Track distance and that equal the point of constant be called ellipse, two fixed points are called focus, the distance between focus is called focal length, is expressed as with mathematical expression:

\frac{y^{2}}{a^{2}} + \frac{x^{2}}{b^{2}} = 1 (a > b > 0)

For preventing that the unnecessary rotation of swiveling wheel 2 can be adorned swiveling wheel stop device 11 near swiveling wheel 2, as screw bolt etc. in the oval process of picture on support 8.

From the above, development of the present utility model is to be based upon on the basis of science fully, design science is reasonable, and it is simple in structure, paint fast oval, during use, as long as find out two fixed points (being bifocal) in accordance with regulations, two 6 on compasses place on two fixed points, with the length of the oval semi-minor axis oval paintbrush point of drawing a picture, with trajectory tension, paintbrush is contained on the ring set 5 on the trajectory, under the affecting of trajectory, the turn paintbrush, just the different ellipse of big or small length semiaxis that can draw on request, of the present utility model succeeding in developing must be made creationary contribution for improving picture elliptical velocity and quality.

Claims

1, a kind of ellipse drawing instrument, include compasses and trajectory, it is characterized in that, on the one supporting leg bottom lateral surface of compasses (1) swiveling wheel (2) is housed, trajectory (4) one ends install around on swiveling wheel (2), fixedly rotating ring (7) of trajectory rotation retainer ring (3) and trajectory is housed respectively on the two fixed heads (6) of two supporting leg bottoms of compasses (1), trajectory (4) is passed trajectory rotation retainer ring (3), the other end is fixed on trajectory fixedly on the rotating ring (7), the paintbrush fixed cover (5) of slip is housed on the trajectory between Liang Dingtou (6).

2, ellipse drawing instrument according to claim 1 is characterized in that, said swiveling wheel (2) is contained in the rotating shaft (9), and rotating shaft (9) is contained on the support (8), and support (8) is fixed on the lateral surface of supporting leg bottom.

3, ellipse drawing instrument according to claim 1 is characterized in that, said swiveling wheel (2) one side leg bottoms are near the outer threading nose (10) that is equipped with of fixed head.

4, ellipse drawing instrument according to claim 1 is characterized in that, said trajectory fixedly rotating ring (7) is the reassembling type rotating ring.

5, ellipse drawing instrument according to claim 1 is characterized in that, the distance between two fixed heads (6) of two supporting leg bottoms of said compasses (1) is F ₁, F ₂Between distance, length is 2a, wherein the length of a is a ²=c ²-b ², a length is that oval center of circle O is to fulcrum F in the formula ₂Between distance, OF ₁Between distance equal OF ₂Between distance, D, E on ellipse short shaft y, A, B on transverse x, D, F ₂Between distance C equal distance between OB or OA.

6, ellipse drawing instrument according to claim 1 is characterized in that, said support (8) is gone up near swiveling wheel (2) swiveling wheel stop device (11) is housed.