CN2452751Y

CN2452751Y - Multi-functional compasses

Info

Publication number: CN2452751Y
Application number: CN 00232699
Authority: CN
Inventors: 鲁觉海
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-05
Filing date: 2000-05-05
Publication date: 2001-10-10
Anticipated expiration: 2010-05-05

Abstract

The utility model relates to a pair of compasses, which solves the technical problems of complex method, slow speed and inconvenience of the existing compasses when an ellipse is drawn. The size and the eccentricity of a drawn circle and the sizes of two oscillating arms can be respectively determined by the utility model through adjustment, and the radius of the compasses is extended and shortened according to a definite period to draw. Both various positive circles and various ellipses can be drawn by the compasses, and known length and a line segment can also be drawn (a straightedge is not additionally used). The utility model is suitable for various fields such as industrial design, education, teaching, etc. and has the advantages of easy use and fast and precise drawing.

Description

Multifunctional compass

The utility model relates to a kind of compasses, can make various circles, is specially adapted to do oval.

The compasses of extensive use have two pins in the life, by change distance between two pins do each eccentricity (the flat degree of circle) be zero just round, do with it oval, must be with " four heart methods " or the mapping of " concentric circles " method, method is loaded down with trivial details, speed is slow.Make ellipse in addition and also use oval template.The oval nib that has several sizes, eccentricity not to wait on the template.But number of orifices is limited eventually, is difficult to sometimes be suitable for.

The purpose of this utility model provides compasses in, and it can not only make the just round of various radiuses, and can make the ellipse of any eccentricity.

The purpose of this utility model is achieved in that diaxon (5), (16) are enclosed within axle sleeve (2), (15) respectively and are connected by swing arm (11), cushion pin (7) is enclosed within on the axle (5), pen cap pin is enclosed within on the axle (16) by swing arm (21), overlapping conical gear (4), (17) respectively on axle (5) and the axle (16), the number of teeth of active conical gear is 2 times of passive conical gear, and is connected by travelling gear (3), (18) and telescopic shaft (10).

Axle sleeve (15) kink and can slide in swing arm (11).

Chute head (22) kink and can slide in swing arm (21).

It is many that the utility model compared with prior art has function, adaptable advantage, and it can not only do the just round of various radiuses, and can directly make various ellipses fast; Can also make the line segment of length (not using ruler in addition) as can be known.

Description of drawings:

Fig. 1 is the multifunctional compass vertical section.

Among the figure 1, stem 2, axle sleeve 3, travelling gear 4, active conical gear 5, axle 6, bolt 7, cushion pin (dovetail pin) 8, axle sleeve frame 9, fastening bolt 10, telescopic shaft 11, swing arm 12, fastening bolt 13, axle sleeve frame 14, stop screw 15, axle sleeve 16, axle 17, driven bevel gear 18, travelling gear 19, stop screw 20, chute head 21, swing arm 22, chute head 23, stop screw 24, pen cap pin 25, stop screw 26, pen.

Of the present utility model each zero, the structural relation of parts: the lower end of axle (5) is by bolt (6) the dovetail pin (7) of ining succession, the upper end kink is in axle sleeve (2) lining, axle (5) tightens initiatively conical gear (4) of set, axle sleeve (2) one sides are fixed a swing arm (indicating scale) (11), the other end kink axle sleeve of swing arm (11) is in the axis hole of (15), axle (16) tightens a driven bevel gear (17), main, driven bevel gear (4), (17) respectively with travelling gear (3), (18) Vertical Meshing, the travelling gear (3) that two numbers of teeth equate, (18) be fastened on an energy axial stretching, and can transmit the two ends of the telescopic shaft (10) of torsion, telescopic shaft (10) two ends travelling gears (3), (18) difference kink in back is at two axle sleeve framves (8), (13) in, diaxon stock (8), (13) respectively by two fastening bolts (9), (12) be fixed on axle sleeve (2), (15) inboard, the number of gears of active conical gear (4) is 2 times of driven bevel gear (17), the fastening chute head (20) in lower end of axle (16), swing arm (21) one end kinks are in the chute of chute head (20), lock by stop screw (19), other end kink is locked by stop screw (23) in the chute of chute head (22).A following fastening pen cap pin (24) of chute head (22), pen (26) is inserted in the pen cap of straight straddle (24), is locked by stop screw (25).

During mapping, earlier according to long axis of ellipse and minor axis length, by regulating stop screw (14), (23) harmonize axle sleeve (15) respectively in swing arm (11), the position of chute head (22) in swing arm (21) and locking, hand is held dovetail pin (7) with pen (26) vertical the be inserted in plate when mapping used of stem (1) with compasses, on the faces such as paper, when compasses are the center of circle clockwise (counterclockwise) rotation with dovetail pin (7), relative plate, faces such as paper, axle (5), active conical gear (4), dovetail pin (7) does not rotate, and all the other each zero, parts all rotate around axle (5), wherein (26), pen cap pin (24) is with swing arm (21), (11) when axle (5) rotates, because of travelling gear (3) rotates the telescopic shaft (10) by transmitting torsion and the transmission of travelling gear (18) around active conical gear (4) engagement, make driven bevel gear (17) (clockwise) commentaries on classics counterclockwise of meshing travelling gear (18).The pen (26) that is swing arm (21) one ends is around axle (16) (clockwise) rotation counterclockwise.The angular speed of swing arm (21) is 2 times of swing arm (11), and in sum: when swing arm (11) goes to 90 when spending clockwise around axle (5), swing arm (21) goes to 180 degree counterclockwise, and the distance of pen this moment (26) and dovetail pin (7) from large to small; When swing arm (11) goes to 180 when spending clockwise, swing arm (21) goes to 360 degree counterclockwise, and pen this moment (26) changes from small to big with the distance of dovetail pin (7); When swing arm (11) continues to pass on when 360 spend, swing arm (21) is changeed 720 degree around axle (16), but pen (26) is around axle (a 5) three-sixth turn.Just pen replaces the distance of shortening and elongation and dovetail pin (7) for (26) 2 times, promptly obtains an ellipse of 2 major axis of 2 minor axises.

When chute head (22) slides to chute head (20), when making nib on the axial line of axle (16), the figure that is done is that major axis equals the just round of minor axis; When the size that goes up locking in swing arm (11) and swing arm (21) equated, the figure that is done was a line segment, length equal to lock in two swing arms apart from sum.

Claims

1, a kind of multifunctional compass, two pins are arranged, and the distance (radius) that changes between two pins is made curve by pen cap pin cast-over pin, and it is characterized in that: diaxon (5), (16) are enclosed within axle sleeve (2) respectively, (15) and by swing arm (11) connect, cushion pin (7) is enclosed within on the axle (5).Pen cap pin is enclosed within on the axle (16) by swing arm (21), and the number of teeth of overlapping conical gear (4), (17) active conical gear on axle (5) and the axle (16) respectively is 2 times of passive conical gear, and is connected by travelling gear (3), (18) and telescopic shaft (10).

2, according to the described multifunctional compass of claim 1, it is characterized in that: axle sleeve (5) kink is in swing arm (11).

3. multifunctional compass according to claim 1 is characterized in that: chute head (22) kink is in swing arm (21).