CN2326452Y

CN2326452Y - Multifunctic compasses

Info

Publication number: CN2326452Y
Application number: CN 98225892
Authority: CN
Inventors: 孙银焕
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-21
Filing date: 1998-01-21
Publication date: 1999-06-30
Anticipated expiration: 2008-01-21

Abstract

The utility model relates to compasses which can draw ellipses. The utility model is mainly composed of a locator pin, a support bracket, a trace circular ring, a scale, a support, a slide member, a trace rod and a pen bracket. The compasses have the advantages of reasonable structure and simple processing technology. The utility model can rapidly and simply draw ellipses and circles, and can also measure angles.

Description

A kind of multifunctional compass

The utility model relates to a kind of stationery, particularly can draw oval compasses.

Usually people are easy to utilize general compasses to draw out various circles, when people drawing when oval, often adopt four kinds of approximate techniques of painting, i.e. focal method, method of altering course with a concentric circle, parallelogram method, four heart sub-elliptical methods, yet no matter adopt which kind of method, all time-consuming drawing quality that influences again.

The purpose of this utility model is to provide a kind of can draw oval multifunctional compass fast.

For achieving the above object, the utility model is mainly by pilot pin, support, the track annulus, scale, support member, sliding part, Track Point, penholder is formed, the pilot pin upper end is fixed on the top of support, the two ends of support are coated at a diameter direction of track annulus by cylinder axis, scale is the circular arc of the big and track annulus external diameter of an internal diameter, one end of scale is connected the pilot pin upper end, the other end of scale be connected with the perpendicular track annulus of cylinder axis place diameter on, scale is marked with the graduation mark of the difference of oval length semiaxis, support member is nested with outside pilot pin, sliding part is arranged on the interior gathering sill of support member, resigning hole is set on the sliding part, Track Point be arranged in parallel near the interior circle of track annulus and with pilot pin, Track Point is fixed in sliding part, the Track Point lower end connects penholder, and spring steel plate one end is fixed on the support member, and the other end withstands on the Track Point.

Be marked with angle line at above-mentioned track annulus.

Track annulus of the present utility model is in and the perpendicular position of pilot pin, regulate the nib of penholder and the distance between the backstay, make it to be oval major semiaxis numerical value,, make the locus circle loop mapping on the graduation mark of the difference of the length semiaxis of scale then around support lower end axial wobble track annulus.After finding the center on the drawing, pin the pilot pin upper end, in one week of rotatable support, can draw out required ellipse.

Track annulus of the present utility model is placed and the perpendicular position of pilot pin, regulate the nib of penholder and the distance between the pilot pin, make it to be radius of a circle, then after finding the center of circle on the drawing, pin the pilot pin upper end, in one week of rotatable support, can draw out required circle.

Utilize the utility model also can take measurement of an angle.Adjust penholder, make penholder and Track Point be in same axis,, catch the pilot pin upper end the drift angle of pilot pin due to required measurement, the rotary motion trace bar, on the track annulus to zero after, the rotary motion trace bar arrives desired location again, can take measurement of an angle.

The utility model is according to the formation principle of ellipse: the circle that with the main shaft is diameter is round the required angle of this main shaft rotation, and can determine the ellipse that produces on the perspective plane thus.The utility model is novel, and is rational in infrastructure, and processing technology is simple, easy to use, can draw out the ellipse of lines slyness apace.

Now in conjunction with the accompanying drawings, embodiment is described.

Fig. 1 is the utility model master TV structure schematic diagram;

Fig. 2 is the B-B cut-away view;

Fig. 3 is the C-C cut-away view;

Fig. 4 is the A-A cut-away view.

Among the figure, 1 support, 2 track annulus, 3 sliding parts, 4 support members, 5 pilot pins, 6 penholders, 7 Track Points, 8 spring steel plates, 9 scales, 10 locus circle loop mapping nuts, 11 cylinder axis, 12 nuts, 13 penholder hold-down nuts, 14 screw rods, 15 gathering sills, 16 resigning holes.

Pilot pin 5 is fixed in the groove on semi-round ring shape support 1 top, the two ends of support 1 are provided with to projecting inward cylinder axis 11, the external diameter of track annulus 2 is less than the internal diameter of support 1, be carved with angle line on the track annulus 2, diameter direction at track annulus 2 is provided with a pair of groove that matches with the cylinder axis 11 of support 1, and support 1 is placed on outside the track annulus 2 by cylinder axis 11.Scale 9 is one 1/4 annulus, its internal diameter is greater than the external diameter of track annulus 2, be carved with the graduation mark of the difference of oval length semiaxis on the scale 9, the upper end of scale 9 is enclosed within the top of pilot pin 5, on the perpendicular track annulus 2 of cylinder axis 11 place diameters, screw rod 14, locus circle loop mapping nut 10 are set, the other end of scale 9 is locked on the track annulus 2.On support member 4, offer the gathering sill 15 perpendicular, the resigning hole 16 of length direction is set on the sliding part 3, sliding part 3 is placed in the gathering sill 15 of support member 4, pilot pin 5 is placed on supports in 4 with pilot pin 5.Track Point 7 at the fixing interior circle near track annulus 2 of the end of sliding part 3, and make Track Point 7 be parallel to pilot pin 5, on support member 4,, make the other end of spring steel plate 8 be butted on Track Point 7, connect penholder 6 with penholder hold-down nut 13 in the lower end of Track Point 7 with nut 12 fixing spring steel discs 8.

Claims

1, a kind of multifunctional compass, comprise pilot pin, it is characterized in that compasses also comprise support, the track annulus, scale, support member, sliding part, Track Point, penholder, the pilot pin upper end is fixed on the top of support, the two ends of support are coated at a diameter direction of track annulus by cylinder axis, scale is the circular arc of the big and track annulus external diameter of an internal diameter, one end of scale is connected the pilot pin upper end, the other end of scale be connected with the perpendicular track annulus of cylinder axis place diameter on, scale is marked with the graduation mark of the difference of oval length semiaxis, support member is nested with outside pilot pin, sliding part is arranged on the interior gathering sill of support member, resigning hole is set on the sliding part, Track Point be arranged in parallel near the interior circle of track annulus and with pilot pin, and Track Point is fixed in sliding part, and the Track Point lower end connects penholder, spring steel plate one end is fixed on the support member, and the other end withstands on the Track Point.

2,, it is characterized in that the track annulus is marked with angle line according to the described compasses of claim 1.