CN2159309Y

CN2159309Y - Ellipse compass

Info

Publication number: CN2159309Y
Application number: CN 92241208
Authority: CN
Inventors: 王焕明
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-04
Filing date: 1992-11-04
Publication date: 1994-03-23
Anticipated expiration: 2002-11-04

Abstract

The utility model provides a drawing instrument used for drawing ellipses, which separates a plug pin having a needle of a general compass into a short tube type and a guide rod structure. The short tube is moved and rotated on the guide rod up to the hilt. The short tube does not have radial jumpiness. A slope angle between the guide rod and a plane can be adjusted and fixed. The short tube is rotated for a circle. A pen point of a plug pin having a pen is ensured to adhere to one plane just right and slid upwards and downwards. An ellipse is obtained. Ellipses with optional curvatures can be drawn exactly one time when the utility model is used. The utility model provides convenience for the drawing of ellipses of people. The utility model is a quantum jump of the drawing history of human beings. The utility model has the advantages of simple structure, easy use and high efficiency of drawing. The utility model is suitable for commercialized production.

Description

Ellipse compass

The utility model relates to a kind of oval drawing instrument of doing.

At present, work is oval nothing more than three kinds of methods: 1, the approximate technique of painting in four centers of circle; 2, method of loci; 3, computer graphics.Obviously, said method is done ovally to have such shortcoming respectively: 1, can not disposablely make figure, and do figure untrue; 2, mapping random big (referring to the lines smooth degree), and method trouble; 3, can not popularization and application.

The purpose of this utility model provides a kind of ellipsograph that can once do ovally fast.

Main points of the present utility model are, pin (1) is inserted on the socket on (2), socket (2) links to each other with boom (3), boom (3) links to each other with a side of double-purpose bar (4), as structure shown in Fig. 1 center line, this part constitutes general compasses syndeton, the opposite side of double-purpose bar (4) is done coelosis shape structure, can on guide rod (5), rotate freely and slide up and down, but circular runout can not be arranged, slide up and down and rotate along guide rod (5) to drive pin (1), this process a value is constant, the shape of double-purpose bar (4) is such: on one side except that the necessary shape that is connected with boom, another side is made tubular structure, and its lower end (is the boundary with the position that links to each other with boom) is short as far as possible, and tubular length is not to cause that lateral shake is a criterion, and, its chamber shape axis and pin (1), socket (2), boom (3) is in the same plane.In addition, in order to guarantee certain 0, slide block (6), screw (7), turnbuckle (8), pilot pin (10,11,12) have been set up, their position relation is such: two mutual vertical but disjoint circular holes are arranged on the slide block, wherein a hole is passed through for slide bar, and horizontal this hole that puts in of a screw is arranged, be fixed on the slide bar soon so that will slide, another hole is passed through for turnbuckle, the bolt top have one with the hole of axis normal, pass through for backstay,, backstay arbitrarily can be fixed on the slide block as long as tighten turnbuckle (8) like this.The structure of backstay as shown in Figure 3, its lower end three pieces of pins that distribute, the line of ragged edge two needle points is vertical with backstay mobile jib (9), and both keep a determining deviation, after guaranteeing that two needle points touch in the plane, mobile jib is difficult for toppling on a certain plane.Middle one piece of pin length is advisable to be no more than the two pieces of pins in both sides, its position should be: after guide rod (5), backstay (9) are fixed on the slide block, be in the same plane with guide rod (5), play the mark effect, for this reason, backstay can be done the square column shape, and both sides needle point line is vertical with two parallel surfaces of this square column.At last, because the pin of this instrument requires the scope of circling round bigger,, can adopt the structure of Fig. 4 so pin (1) can not have unusual outstanding position on every side.Utilize spiral shell to emit the thrust of (14) that pen core (15) is fixed in the chamber (13).

The principle of these ellipse rule (describes in detail slightly) shown in accompanying

drawing

5,6,7.

Accompanying drawing 1 is the structural representation of ellipsograph.Wherein: the pin of 1--band pen, the 2--socket, 3--boom, 4--double-purpose bar, the 5--guide rod, the 6--slide block, 7--screw, 8--turnbuckle, the 9--backstay, 10,11, the 12--pilot pin, the angle on θ--part 3 and certain plane, the nib of a--spare 1 is to the distance of part 4.

Accompanying drawing 2, the A-A profile of accompanying drawing 1.

Accompanying drawing 3, the B of accompanying drawing 1 is to view.

Accompanying drawing 4, the view of piece number 1 in the accompanying drawing 1, wherein: 13--chamber, the 14--spiral shell emits, 15--stamen.

Fig. 5,6, the 7th, the operation principle accompanying drawing of ellipsograph.Wherein Fig. 6 is certain cylindrical front view, and Fig. 5 is cylinder cross section C ₁NC ₃Orthographic drawing, Fig. 7 is cylindrical oblique section C ₂MC ₃Orthographic drawing.

Accompanying drawing 8, the vertical view in the accompanying drawing 1.

Accompanying drawing 9, the C-C profile of accompanying drawing 4.

The using method of this ellipsograph is such: draw two orthogonal cross spiders at first in the plane, shape size according to ellipse, slide block (6) is fixed on suitable position on the guide rod (5), the tip of guide rod (5) is inserted on the intersection point of cross spider, again a value is transferred to the b/2(b--ellipse short shaft), then, utilize backstay (9), pilot pin (10,11,12), slide blocks etc. are transferred to required angle with 0, fixed strain bolt (8) again, and notice that pilot pin (11) will be by the extended line of transverse, like this, make guide rod spatially fixing by a hand again, another rotates double-purpose bar (4) on hand, and the limit moves up and down, nib track in the plane promptly is the ellipse of the work of asking so.

Claims

1, a kind of ellipsograph, by pin (1), socket (2), boom (3), double-purpose bar (4), guide rod (5), backstay (6), slide block compositions such as (6), wherein socket (2) links to each other with boom (3), boom (3) links to each other with a side of double-purpose bar (4), pin (1) can be inserted on the socket (2), constitute similar compasses syndeton, feature of the present utility model is that the opposite side of double-purpose bar (4) links to each other with guide rod (5), and can go up at guide rod (5) simultaneously and slide and rotation, the direction line of its slip and pin (1), boom (3), the axial line of socket (2) is in the same plane, in addition, guide rod (5) links to each other with backstay (9) by slide block (6), and can go up the location at guide rod (5) and backstay (9) simultaneously, to guarantee certain 0, one end of guide rod (5) is pointed structure, the body of rod links to each other with slide block (6), the body of rod of backstay (9) also links to each other with slide block (6), and three pieces of pilot pins (10 of end distribution, 11,12), wherein two piece (10,12) top line is vertical with backstay (9), mark middle one piece (11), after guide rod (5) and backstay (9) are located by slide block (6), guide rod (9) is in and two pilot pins (10 all the time, 12) in the vertical plane of most advanced and sophisticated line, telltale mark (11) is in by guide rod (5) and two pilot pins (10,12) in the plane that most advanced and sophisticated line is vertical.

2, according to the described ellipsograph of claim 1, a side that it is characterized in that double-purpose bar (4) except that with necessary shape that boom (3) links to each other, its opposite side is a tubular structure, the centerline of the center line of pore and pin (1), socket (2), boom (3) is in same plane, the size in hole and guide rod (5) match, the length of pipe is: its lower end (with boom (3) connecting place be the boundary) short as far as possible, upper end face distribution on-slip line, whole length does not cause that with it excessive circular runout exceeds on guide rod (5).

3, according to claim 1 or 2 described ellipsographs, it is characterized in that guide rod (5) is the pole shape, wherein an end is the tip-like structure, and the diameter of guide rod (5) is looked length and determined, to guarantee that enough rigidity is as the criterion, the length of guide rod (5) is looked the size of ellipsograph and is determined.

4, according to the described ellipsograph of claim 1, it is characterized in that having on the slide block (6) two mutual vertical and disjoint holes, wherein a hole is that guide rod (5) passes, and horizontal this hole that puts in of a screw (7) is arranged, so that slide block (6) is positioned on the guide rod (5), another hole is that turnbuckle (8) passes, one end of turnbuckle (8) has a hole, passes through for backstay (9), and the other end has nut, interact, stay slide block (6) is fixed on the backstay (9).

5, according to the described ellipsograph of claim 1, the body of rod that it is characterized in that backstay (9) is a column structure, one end distribution, three pieces of pilot pins (10,11,12), and the line at wherein two pieces (10,12) tip is vertical with backstay (9), middle one piece (11) make telltale mark, its position is: after guide rod (5) and backstay (9) were by slide block (6) location, telltale mark (11) was in the vertical plane by guide rod (5) and the most advanced and sophisticated line of two pilot pins (10,12).

6, according to the described ellipsograph of claim 1, a stamen (15) that it is characterized in that pin (1) is to rely on spiral shell to emit (14) to be fixed in the chamber (13), and the periphery of a chamber (13) does not allow unusual outstanding position.