CN2089877U

CN2089877U - Curve ruler with compasses board position

Info

Publication number: CN2089877U
Application number: CN 90223533
Authority: CN
Inventors: 俞师强
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-11-10
Filing date: 1990-11-10
Publication date: 1991-12-04

Abstract

The utility model relates to a curve ruler with compasses board position, belonging to the stationary supply; the utility model is assembled by a filamentous ruler arm and tabular compasses; the ruler arm of the curve ruler is a plastic part, and is suitable for the periodicity of each function image; thus the positive and cosine curves, the positive and cotangent curves, the parabola, the hyperbola, the involute and other curves can be smoothly plotted by the curve ruler. The compasses board uses a ruler body as a skeleton, and a glidingly clamp is moved on the ruler body; the relative distance formed by the sliding clamp and a fixed clamp is used as the radius, and a circle drawing device is formed; an elliptical drawing device is formed by the thread rope of the sliding clamp and the fixed clamp equipment; in addition, the curve ruler also has the constructional characteristics and performances of a set-square, a protractor, a pencil knife and a drawing pen.

Description

Curve ruler with compasses board position

The utility model belongs to stationery:

Spline plate and compasses in the stationery are two independently drawing instruments now, and the former is used for picture straight line and some single fixing curves, the curve that the latter is used for the picture circle and is made of circular arc.Their structural behaviour is simple, can not show the curve complicated patterns, even must be used with other drawing instrument, needs certain painting skill, and is very inconvenient during drawing.

The purpose of this utility model: be to avoid the weak point in the above-mentioned technology, provide that a kind of formula spline arm constitutes with the compasses plate by moulding, can draw smoothly, just, cosine curve, just, cotangent curve, parabola, various curves such as hyperbola, ellipse, circle and involute, and have protractor, set square or dull and stereotyped chi simultaneously, comprise the drawing instrument of the design feature and the serviceability of pencil-knife, drawing pen.The utility model reaches with following measure:

Spline is to use the rubber elastomeric material, plastic materials such as metal, hard materials such as duroplasts are made, by chi arm (1), end ring (2), pull bar (3), plotting head (4), chi body (5), locating clip (6), positioning belt (7), static bit card (8), card (9) slides, pencil-knife (10), protractor (11) is formed, being thread chi arm makes with plastic materials such as metals, it is the plastic part of chi body, therefore, its available pull bar changes corresponding camber by end ring by the needs of institute's trace, the periodicity that adapts to each functional picture, can smoothly draw various function curves exactly, and can be fixed on the compasses of platy structure by afterbody or end ring.

The plotting head that the pull bar of spline is subsidiary, the same end ring of its thickness state energy, slip card and common ball penholder are used.Plotting head relies on its thing and inhales juice, also inhales juice automatically.

The compasses plate closes with rubber and so on soft material with duroplasts or glass fibre or metal and so on hard material and makes, and is to be skeleton with the chi body, is the picture round belting that radius constitutes with the relative distance that forms with static bit card that moves of slider on the chi body.The profile of compasses plate or the shape of ruler; Or a upright right angle triangle is with another less upright right angle triangle, one side have protractor by one, the ruler of width between big or small set square contains the shape of rectangular co-ordinate to what form.

The static bit card of spline or slide card have the fixedly characteristics of cotton rope, and realize drawing oval performance with these characteristics.Static bit card can be the plate holder shape, also can be pawl folder shape, goes back the dentalation of unidirectional displacement simultaneously.It can be used as the nook closing member of compasses, also can be as the pen card of compasses.Slide and block or the structure of corrugated spring card, or screw is with the structure of spring leaf combination.It can make thin lead pipe, ball pen and plotting head obtain the location.

The locating clip of spline and positioning belt or make separately or jointly the chi arm and to the location.Locating clip is rigid connection, and positioning belt is that elasticity connects.

The pencil-knife of spline, but blade-like structure, the also structure of pencil sharpener shape.

The utility model has following advantage than prior art:

(1). condensed the design feature and the serviceability of set square (or ruler), protractor, pencil-knife, drawing pen.

(2). improved the construction features of compasses, the superstructure loosening of reason compasses does not make round track skew occur, can directly obtain the numerical value of radius, has improved the accuracy that compasses use.In addition, this structure can also be drawn the track in ellipse garden exactly.

(3). increased the plastic part of chi body, the curved edge that does not occur on the reason hard curve ruler is not restricted, and has enlarged the scope of curve plotting, can smoothly reappear drawn curve exactly, the periodicity that adapts to each functional picture, simple and easy method of drawing each curve.

(4). structural behaviour, plainly easily see, be convenient to grasp and use.

(5). style is attractive in appearance, bright and clear, novel.

(6). cheap, be easy to mechanization production.

Description of drawings is as follows:

Fig. 1 moulds formula spline arm with the positive combination figure that contains the compasses plate of rectangular co-ordinate shape.Fig. 2 is the outline drawing of plotting head and the perspective view of pull bar.Fig. 3 moulds the positive combination figure of formula spline arm with ruler shape compasses plate.

Below in conjunction with accompanying drawing the utility model is further described:

Accompanying drawing 1. is moulded formula spline arm (1) and is made with metal material, is the plastic part of chi body, thereby can change its corresponding camber by the needs of institute's trace, makes it obtain the location by the compasses plate again, just can reappear drawn curve.

The end ring (2) that accompanying drawing 1. is moulded formula spline arm is the part that links the location with the compasses plate, and pull bar (3) also partly reverts to linearity by end ring, makes spline arm (1) after painting the curve of required part, can refigure, change its camber.

The pull bar (3) of accompanying drawing 2. splines is subsidiary plotting head (4), and the same pull bar of plotting head (4) (3) can link and decompose selectively, so that they can same end ring (2) slide and block (9) and common ball penholder is used.

To be duroplasts close the compasses of the platy structure made from soft rubber to the compasses plate of accompanying drawing 1, and it is to be skeleton with chi body (5), and card (9) relative distance that forms with static bit card (8) that moves on the chi body is the picture round belting that radius constitutes to slide.

The external form profile of accompanying drawing 1 spline chi body (5) is that a upright right angle triangle is with another less upright right angle triangle, one side have the ruler of protractor (11) width between big or small set square to forming by one.It contains the form of rectangular co-ordinate, so that draw angle and definite curve " projection " value at " coordinate in length and breadth " usually.

The static bit card (8) of accompanying drawing 1. splines, one is the plate holder shape, another is a pawl folder shape.They all are used for the device nook closing member.The slip card of accompanying drawing 1 spline is the structure of corrugated spring card, and its two holes are used for fixing thin lead pipe, refill for ball-point pen and plotting head (4).The thin lead pipe of the static bit card (8) and the card (9) that slides has the fixedly characteristics of cotton rope, and realizes drawing the performance in ellipse garden for this reason.

The locating clip (6) of accompanying drawing 1 spline is the rigid connection of end ring (2) of homoplasy spline arm.Positioning belt (7) is tight rubber strip, and it is that elasticity connects with the afterbody of chi arm.

The blade-like pencil-knife (10) of accompanying drawing 1. splines and egg type hole are common to be constituted.The protractor of spline (11) is a semi-circular shape.

Spline is the single making of each part, and the system of closing then forms.

Claims

1, a kind of rubber elastomeric material of using, plastic materials such as metal, hard materials such as duroplasts are made, by chi arm (1) end ring (2), pull bar (3), plotting head (4), chi body (5), locating clip (6), positioning belt (7), static bit card (8), card (9) slides, pencil-knife (10), and the spline of protractor (11) composition, it is characterized in that: the chi arm of spline is that the chi body is thread part, the compasses plate of spline is that the chi body is tabular part, it is by static bit card, the ruler or the angle square of card and the chi body formation of sliding picture circle, this spline is combined into one these two parts by its positioner.

2, according to the described spline of claim 1, it is characterized in that the subsidiary plotting head of pull bar of spline, plotting head with the thickness state of pull bar can same end ring, slide card and common ball penholder be used.

3, according to the described spline of claim 1, it is characterized in that the compasses plate to spline location, compasses plate are is skeleton with the chi body, with slip be stuck on the chi body to move the relative distance that forms with static bit card be the picture round belting that radius was constituted.

4, according to the described spline of claim 1, the static bit card that it is characterized in that spline and slip card, they have the fixedly structure and the oval performance of drafting of cotton rope.

5, according to the described spline of claim 1, the locating clip that it is characterized in that spline and positioning belt, locating clip is used for rigid connection, and positioning belt is used for elasticity and connects, and they can be separately or make spline chi arm obtain the location jointly.

6, according to the described spline of claim 1, it is characterized in that the pencil-knife of spline, it can be the blade-like structure, also can be pencil sharpener shape structure.