CN2218087Y - Two-way ellipse and circle drawing instrument - Google Patents

Abstract

The utility model relates to a two-purpose ellipse and circle drawing instrument which is formed by combining an assembly for drawing circles and an assembly for drawing ellipses, wherein, the assembly for drawing circles is composed of a pair of compasses and a run idle type sheathing head, and the assembly for drawing ellipses which is composed of a master member of a transforming gear set, a secondary member, a shaft rod, a radius regulation plate and a transmission rod. The run idle type sheathing head is sheathed on the head top of the compasses. When a user draws, the run idle type sheathing head is supported in a palm or is nipped between finger slots to be used as an interval type centralized positioning rod. The head of the compasses is rotated by fingers, which can draw a circle. The sheathing head clips and moves a crankshaft driven by the gear set, the difference of the shaft diameter of the longest shaft and the shaft diameter of the shortest shaft of an ellipse is converted into linear type push and pull through the transmission rod by a handle of the shaft, a drawing rod is gradually operated and controlled, and an ellipse is drawn.

Description

The just round double-purpose rule of ellipse

The utility model relates to the just round double-purpose rule of a kind of ellipse, and it mainly is a kind of drawing instrument that can conveniently provide the user to draw ellipse or just justifying.

From student's lessons until the technological applications of social life, all draftings all can use ellipse to describe the projection of its different angles about the three-dimensional chart of circle, so the oval probability that is used is very frequent.

Oval system belongs to a kind of non-circular curve, and it is by the not equidistant similar round shape that the diameter of axle constituted, and circle can at will just can carry out with two waddys so merely unlike just drawing so draw ellipse.

When generally drawing ellipse, except the action of operation picture circle, need operate both sides and draw oval operation.Therefore, for making the oval energy of drafting convenient, in the past, once creation has been invented many different instruments for user's utilization, and its basic structure, generally all establish earlier and stand still for a long while on the center of circle, establish one again and draw bar and draw circle, and then some assemblies are set control the picture bar and reach and draw oval operation by an axostylus axostyle.

Axostylus axostyle is wherein mostly continued to use on the upright paper of fixed form of compasses axostylus axostyle, also has and establishes a bracing frame or framework in addition, makes plane operation to support instrument.And paint round picture bar, all with bar head bolt on fixed axostyle, be provided with adjusting distance and pitch of the laps drawing between two bars, and the drafting elliptical components that it is set up is more variant, various creation all have its different characteristics and assembly, have with gear driven, as No. 19945 ＂ arbitrary ellipse rule of the novel patent in Taiwan ＂, No. 33889 ＂ ellipsograph ＂ etc., have and drive with flexible member, as No. 23000 ＂ ellipsograph ＂ of Taiwan patent, No. 215638 ＂ ellipsograph ＂ etc., have draw with guider guiding oval, as No. 88680 any line of apsides ellipsograph of ＂ of Taiwan patent ＂, No. 130018 ＂ device for drawing ellipses ＂ ... Deng.Only these valuable creation are on framework, mostly follow above-mentioned basic structure and fail to do breakthrough improvement, cause the disappearance that always has blemish in an otherwise perfect thing, be that every kind of creation instrument mostly needs to make with the hands operation simultaneously to draw and can not can be by one hand through easy to operate as common compasses, even have costliness and problem such as not portable concurrently, cause general students in middle and primary schools generally not use, it shows the necessity that is improved again.

Therefore the purpose of this utility model promptly is: provide a kind of ellipse just round double-purpose rule, its be a kind of can be by singlehanded ease of Use, and be again the just round double-purpose rule of ellipse of the simple low cost of parts.

The utility model provides a kind of ellipse just round double-purpose rule, is to paint round assembly and by one to draw elliptical components and combine, wherein

This paints round assembly: be a sheathed idle rotation type is pullover on the rule head of compasses,

This drafting elliptical components: comprise a conversion bevel gear set, radius regulation and control plate and a drive link, conversion bevel gear set wherein comprises an axostylus axostyle and is vertically set on the compasses head, and load one helical gear is done rectilinear rotation from part, make a helical gear main part be solidly set on the pullover lower end of idle rotation type again and be meshing with each other from part with this helical gear, and on the disk axes of radius regulation and control plate to be frame be locked in helical gear from the part, and the set point on radius regulation and control plate forms a crank axle to disk axes, and this set point socket one drive link is connected on the keyed end of compasses picture bar.

By this, make that idle rotation type is pullover to be nested with on the compasses crown, so that withstand on the palm of the hand or be clipped between webs central locating rod painting bowlder as compartment, can point the rotation compasses head and paint round operation, make pullover card move a crank axle again in addition, with the difference of the long and short two diameter of axle of ellipse, convert the push-and-pull of orthoscopic to and control the picture bar and do to draw oval operation via drive link.

The just round double-purpose rule of aforesaid ellipse, wherein radius regulation and control plate can be adjusted the length of footstalk at any time to set the difference of the diameter of axle.

The just round double-purpose rule of aforesaid ellipse are wherein drawn elliptical components and can be unclamped meshed gears or unclamp the regulation and control plate of rotation or make the set point of regulation and control plate be set on the disk axes or mode such as rejecting and only paint round operation.

Advantage of the present utility model is: the assembly of formation is simple, makes cheaply, and it is cheap and easy to carry to cause consumption price.Simple structure again, except that available singlehanded easy operation, still can be easily by the distance of measuring the push-and-pull of drive link institute, set the difference of the longest oval and the shortest two diameters of axle, use and be very easy to be its main characteristic, simultaneously the utility model can be drawn the chart of any size and the ellipse of the length diameter of axle arbitrarily, and also can make ellipse, just round double-purpose is its main effect.

Further specify architectural feature of the present utility model and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings:

Fig. 1 is the front view of the utility model one preferred embodiment.

Fig. 2 is the three-dimensional exploded view of the utility model idle rotation type pullover and rule heads and bevel gear set.

Fig. 3 draws the schematic perspective view of elliptical components for the utility model.

The utility model is the just round double-purpose rule of a kind of ellipse, and it is to be provided with that an idle rotation type is pullover to be nested with on the crown of common compasses, so that withstand on the palm of the hand when drawing or be clipped between webs central locating rod as compartment, rotates compasses and paints round operation and can point; And,, the difference of the longest and the shortest two diameters of axle of ellipse by the push-and-pull of footstalk through drive link, is driven the picture bar gradually and does to draw oval operation by the rotation of crank axle again by the moving gear train of drawing elliptical components of pullover card.The assembly of present embodiment paints round assembly by one and a drafting elliptical components is formed, and wherein paint round assembly as shown in Figure 1, comprise that common compasses and an idle rotation type overlap first-class element and combine, wherein common compasses contain that the most basic central shaft 11, is drawn bar 12, a compasses head 13 is tacked by bolt 14 jointly, and idle rotation type pullover 2 is to be set in the compasses top to go up (as shown in Figure 2).

Draw elliptical components: as Fig. 1, comprise that elements such as a conversion bevel gear set, radius regulation and control plate and a drive link combine, conversion bevel gear set wherein comprises an axostylus axostyle 33 and is vertically set on the compasses head 13, and load one helical gear is done rectilinear rotation (as Fig. 2) from part 32, make a helical gear main part 31 fixed covers be located at pullover 2 lower ends again, make main part 31 then and mesh (as Fig. 3) from part 32.And 4 of plates of radius regulation and control are locked on rotating disk 34 axle center of helical gear from the part 32, and set set point 41 be connected on the keyed end 121 of picture bar 12 by set point socket one drive link 5 on regulation and control plate 4.

When instrument when drawing general positive circular graphical chart (as Fig. 1), can carry compasses head 13 by one hand, make pullover 2 on being enclosed within withstand on the palm of the hand (or being clipped between webs), and stand still for a long while on the predetermined centre point of drawing board with the fixed axostyle 11 of compasses, set the radius of 12 on axostylus axostyle and picture bar again, and the tight bolt 14 of bolt, (must unclamp draw elliptical components meshed gears group make only paint round operation) and then to point the compasses head 13 of rotation compasses gently.At this moment withstand on pullover 2 of the palm of the hand and will become fixed position, and and stand still for a long while common central locating rods that form a kind of compartment of bar pin 111 on drawing board, a whole simultaneously compasses become dynamic gig, therefore draw the pie chart that bar just can draw very easily and expect.The improved drafting mode of this kind not only can reduce the probability of mistake, also can reduce the inconvenience of rotation setting stick when drawing, and makes operation more easy.

Drawing when oval when instrument again, owing to painting circle and drawing oval two systems and carrying out simultaneously, so when painting the rotation of round assembly, the helical gear axostylus axostyle 33 of conversion that is fixedly installed on compasses head 13 sides helical gear from and then compasses head 13 rotations (as Fig. 2) of part 32 with load, at this moment the cover helical gear main part 31 that fixes on pullover 2 lower ends is because of being to maintain static, just can mesh helical gear continuously from part 32 (as Fig. 3), and the moving rotating disk 34 from part 32 of card, make the rotation voluntarily of its one side, simultaneously one side is being followed and is being painted round assembly pitch of the laps and walk, so, if no matter paint round assembly and rotate to any orientation, helical gear main part 31 can continue all that card is moving does rectilinear rotation from part 32, therefore if the number of teeth 311 of helical gear main part equals helical gear 2 times from the number of teeth 321 of part, then, just can drive rotating disk 34 rotations 2 circles whenever painting round one week of assembly pitch of the laps.And then in radius regulation and control plate 4 setting set points 41, make set point form a crank axle (as Fig. 3) to 341 of disk axes, be set on the footstalk length 42 with the longest difference that reaches the shortest two diameters of axle, and convert the push-and-pull of orthoscopic to and drive the oval operation of picture bar 12 do draftings via the rotation of drive link 5 with footstalk length with ellipse.At this moment if 42 push-and-pulls of footstalk length of establishing crank axle the push-and-pull distance of drawing bar be oval the longest and the shortest two diameters of axle difference four/for the moment, then crank axle revolution moving 1 encloses, just can drive the picture bar and draw the elliptic curve of a circulation, so when whenever painting round assembly when drawing the chart of a circle, crank axle just rotates 2 times, draw bar and will be drawn the push-and-pull of 2 circulations of elliptical components, and respectively draw the elliptic curve of half-turn on the circumference both sides, and finish the oval chart of an expection.

Claims (1)

1. just round double-purpose rule of an ellipse are to paint round assembly and by one to draw elliptical components and combine, and it is characterized in that:

This paints round assembly: be a sheathed idle rotation type is pullover on the rule head of compasses,

This drafting elliptical components: comprise a conversion bevel gear set, radius regulation and control plate and a drive link, conversion bevel gear set wherein comprises an axostylus axostyle and is vertically set on the compasses head, and load one helical gear is done rectilinear rotation from part, make a helical gear main part be solidly set on the pullover lower end of idle rotation type again and be meshing with each other from part with this helical gear, and on the disk axes of radius regulation and control plate to be frame be locked in helical gear from the part, and the set point on radius regulation and control plate forms a crank axle to disk axes, and this set point socket one drive link is connected on the keyed end of compasses picture bar.

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