CN2273255Y

CN2273255Y - Multifunction spline

Info

Publication number: CN2273255Y
Application number: CN 96210477
Authority: CN
Inventors: 俞师强
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-05-02
Filing date: 1996-05-02
Publication date: 1998-01-28
Anticipated expiration: 2006-05-02

Abstract

The utility model belongs to stationery tool. A part of a multifunction spline, used for drawing sine and cosine curves, parabolas and hyperbolas, is composed of a silk-shaped curve and a spline plate through a curve arm clamp, a screw connection piece and a guiding hole of the spline plate. Moreover, a part of the multifunctional spline, used for drawing ellipses and circles, is composed of a line cord and the spline plate through a line clamp, the screw connection piece and the guiding hole of the spline plate. In addition, a part of the multifunctional spline, used for drawing involutes, is composed of an involute ring and the spline plate through the screw connection piece and the guiding hole of the spline plate.

Description

Multi-functional spline

The utility model belongs to stationery:

Chi plate, curve ruler and compasses in the stationery are normally made by a kind of material now, their structural behaviour is simple, can only draw some straight lines, angle and some single fixing curves, the curve that compasses also can only be drawn some circles and be made of circular arc, can not show ellipse on demand, involute and have periodically variable curve, very inconvenient during drawing.

The purpose of this utility model: be to avoid the weak point in the above-mentioned technology, provide a kind of plasticity to crank arm by the card of cranking arm, cotton rope is by ply-yarn drill, gradually open loop is by fixed ring card, match by the guide hole of threaded connector with the chi plate, constitute can draw parabola exactly, ellipse is a main performance, and can just draw smoothly simultaneously, cosine curve, just, cotangent curve, hyperbola, various function curves such as circle and involute, the multi-functional spline at angle, the chi body of this multi-functional spline contains various ways: it can be a ruler, angle square, it also can be T-square, protractor, even can be the chi plate that designs on the chopping board.

The utility model reaches with following measure:

Multi-functional curve is with plastic materials such as soft metals enough, hard material such as duroplasts or hard metal is made, by chi plate (1), crank arm (2), the card (3) of cranking arm, threaded connector (4), guide hole (5) ply-yarn drill (6), cotton rope (7), gradually open loop (8), fixed ring card (9) is formed, the plasticity that is fixed is cranked arm, adapt to that each letter ring card (9) forms, the plasticity that is fixed is cranked arm, the periodicity that adapts to each function curve, can smoothly draw various function curves exactly, and can be by the card of cranking arm, threaded connector is by the guide hole of chi plate, big low profile on demand is fixed on the chi plate.

The ply-yarn drill of multi-functional spline, be fixed on the chi plate by the focal length of ellipse and the cotton rope of fixed length, constitute and draw oval device, when focal length is zero, constitute the device of picture circle by the guide hole of threaded connector by the chi plate.

The gradually open loop of multi-functional spline, be fixed on the chi plate by the guide hole of chi plate, constitute the device of drawing involute by fixed ring card, threaded connector.

The profile of multi-functional spline chi plate, or ruler or angle square or T-square or protractor, even can also be the chi plate of guide rail plotter combination, it is characterized in that the guide hole structure of chi plate.No matter the chi plate of using as the student, still as teacher's teaching ruler plate, or as the chi plate of designer's guide rail plotter, as long as this guide hole structure on the chi plate can be the card of cranking arm, ply-yarn drill, fixed ring card, be combined into one by the screw thread fitting, just can constitute the multi-functional spline of drawing various curves.

Multi-functional spline, but also can load onto pencil-knife, this pencil-knife blade-like structure, the also structure of pencil sharpener shape.

The utility model possesses following advantage than prior art:

1, have multiple parts, multiple material, multiple function, it is rational in infrastructure, each parts mounting or dismounting is convenient, is connected firmly.

2, can draw the track of various ellipses on request exactly.

3, can repeatedly draw the various function curves that constitute by parabola effectively smoothly.

4, can draw the involute of different circular diameters on request.

5, attractive in appearance, bright and clear, the utility model of structure, be convenient to the palm and use.

6, with low cost, simple in structure, be easy to machinery and produce in batches.

Description of drawings is as follows:

Fig. 1, be card, cotton rope, ply-yarn drill and threaded connector the positive combination figure that cranks arm, cranks arm of multi-functional spline with angle square shape chi plate.

Fig. 2, be card, cotton rope, ply-yarn drill and threaded connector the positive combination figure that cranks arm, cranks arm of multi-functional spline with ruler shape chi plate.

Fig. 3, be the gradually open loop of multi-functional spline and the positive combination figure of fixed ring card.

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

The multi-functional spline of accompanying drawing (1) and accompanying drawing (2) is cranked arm, it is the plastic part of chi body, can change its camber on demand, and can make its outline position of upper and lower, left and right conversion on demand of cranking arm, under optimal profile, obtain the location by the card of cranking arm, guide hole structure, threaded connector.

Two ply-yarn drills size of accompanying drawing (1) and the multi-functional spline of accompanying drawing (2) is consistent, and structure is relative, and the sharp corner pressed close to mutually of two ply-yarn drills contains the aperture of a threading respectively.One of them ply-yarn drill can relatively move in the guide hole of chi plate, makes the distance of ply-yarn drill and the length of cotton rope, with according to the oval situation that will draw, is fixed by threaded connector.

Multi-functional spline is the single making of each part, and the system of closing then forms.

Claims

1, a kind of by plastic materials such as soft metals, hard materials such as duroplasts are made, by chi plate (1), crank arm (2), the card of cranking arm (3), threaded connector (4) guide hole (5), ply-yarn drill (6), cotton rope (7), gradually open loop (8), fixed ring card (9), the multi-functional spline that constitutes, it is characterized in that the cranking arm of multi-functional spline, cotton rope respectively by the card of cranking arm, ply-yarn drill, and the guide hole structure of threaded connector by the chi plate be fixed on the chi plate.

2, according to the described multi-functional spline of claim 1, it is characterized in that the gradually open loop and the fixed ring card of multi-functional spline, be fixed on the chi plate by the guide hole on the chi plate by threaded connector.

3, according to the described multi-functional spline of claim 1, it is characterized in that the guide hole structure on the multi-functional spline chi plate, this chi plate that plays the guide hole structure that is connected with threaded connector, but ruler, angle square, T-square are also with the combined chi plate of design chopping board.