WO2018076520A1

WO2018076520A1 - Conic curve drawing instrument

Info

Publication number: WO2018076520A1
Application number: PCT/CN2016/111969
Authority: WO
Inventors: 段惠中
Original assignee: 段惠中
Priority date: 2016-10-26
Filing date: 2016-12-25
Publication date: 2018-05-03
Also published as: CN106427318A

Abstract

A conic curve drawing instrument, comprising a flexible cord (1), a flexible cord bead string (2), a flexible cord pen (3), a bead string slide fastener clamp (4), a bead string slide fastener pen (5), a fixing needle (6), a framework (7), a fixing strip (8) and a sliding T-shaped frame (9); the flexible cord bead string (2) consisting of the flexible cord (1) and beads (21) threaded on the flexible cord (1); the flexible cord pen (3) consisting of a pen nib (31) and a pen holder (32); the bead string slide fastener pen (5) consisting of a drawing pen (51) and a box body (52) mounted on the drawing pen (51), the box body being used to fix the bead string slide fastener clamp (4); the fixing needle (6) consisting of a fixing needle pen nib (61) and a fixing needle pen holder (62); the framework consisting of a framework a (71), a framework b (72), a bolt (73) and a fixing element (74); and a fixing needle insertion hole (91) and a slide groove (92) being provided on the sliding T-shaped frame (9), the slide groove (92) allowing the bead string slide fastener pen (5) to slide freely. The present drawing instrument has relatively high use value and economic value.

Description

Quadratic curve plotter

Technical field

The invention relates to the field of student drawing, teaching equipment and the field of hand drawing of related drawing personnel, and particularly relates to a quadratic curve drawing instrument.

Background technique

The quadratic curve generally refers to the conic curve. The ancient Greek mathematicians first began to study the conic curve and obtained a lot of results. The ancient Greek mathematician Apollon used the method of plane cutting cone to study these curves. By cutting the cone perpendicular to the plane of the cone axis, the result is a circle; the plane is gradually inclined to obtain an ellipse; when the plane is inclined to "and and only parallel to a busbar of the cone, a parabola is obtained; with an axis parallel to the cone The plane interception can obtain one of the hyperbola (when the conical surface is replaced by the corresponding conical surface, the hyperbola can be obtained). Apolloni once called the ellipse "defect curve" and the hyperbola "super". "The curve", the parabola is called the "homogeneous curve". In fact, Apollon has used the pure geometry method in his work to obtain all the properties and results of the conic curve in today's high school mathematics. It is well known that the conic curve must be drawn. Special tools can be used. However, the drawing tools in the prior art often have the disadvantages of complicated structure and no portable belt, and further improvements are needed.

Summary of the invention

The present invention provides a quadratic curve plotter that is easy to use and has the function of drawing a plurality of quadratic curves in view of the above-mentioned deficiencies of the prior art.

The technical solution adopted by the present invention to solve the above problems is as follows:

The present invention provides a quadratic curve plotter, comprising a cord, a cord string, a cord stringer, a beaded zipper clip, a beaded zipper pen, a fixed pin, a bracket, a fixed strip, and a sliding T-frame. The cord string is composed of a cord and a bead worn on the cord, the cord pen consisting of a pen tip and a pen holder, and the pen holder is provided with a through hole for wearing the cord The pen holder is fixed on the bracket, and the bead string zipper pen is composed of a brush and a box body disposed on the brush body, and the box body is used for fixing the box a bead string zipper clip, the fixing pin is composed of a fixed needle pen tip and a fixed pin pen bar, the fixed pin pen bar is provided with a soft wire through hole, and the soft wire rope through hole is provided with a rotating bolt, the bracket The frame body a, the frame body b, the bolt and the fixing member are fixed, the frame body a and the frame body b are fixed on the fixing member by the bolt, and the frame body a and the frame body are controlled by the bolt The opening and closing of the frame body a and the lower end of the frame body b are provided with a bayonet, and the sliding T-shaped frame is provided with a fixing pin insertion hole and a sliding groove, and the sliding groove is used for the bead string zipper pen Free to slide.

Further, the fixing needle is not less than two.

Further, the beads on the cord string are equally spaced.

Further, the cord string is not less than 2 strings, and the cord string is threaded through the bead string zipper clip and synchronously slid in the bead string zipper clip.

The beneficial effects of the invention are:

The quadratic curve plotter provided by the invention has the advantages of being convenient to carry and convenient to use, and the quadratic curve plotter can quickly and accurately draw the circle, the ellipse, the hyperbola and the parabola, which greatly facilitates the student, The learning and work of teachers and related drafters have greater use value and economic value.

DRAWINGS

1 is a structural view of a cord stringer of a quadratic plotter according to the present invention;

2 is a structural view of a cord pen of a quadratic curve plotter of the present invention;

3 is a structural view of a bead zipper clip of a quadratic plotter of the present invention;

4 is a structural view of a bead zipper pen of a quadratic curve drawing device of the present invention;

Figure 5 is a structural view showing a fixing needle of a quadratic plotter according to the present invention;

Figure 6 is a structural view of a bracket of a quadratic plotter of the present invention;

7 is a schematic diagram of a quadratic plotter of the present invention when drawing an ellipse;

Figure 8 is a schematic diagram of a quadratic plotter of the present invention when drawing a hyperbola;

Figure 9 is a schematic diagram of a quadratic plotter of the present invention when drawing a parabola.

detailed description

The embodiments of the present invention are exemplified in the following with reference to the accompanying drawings, which are for the purpose of illustration and description.

As shown in FIG. 1 to FIG. 6 , the present invention provides a quadratic curve drawing apparatus, including a cord, a cord string 2, a cord pen 3, a beaded zipper 4, a beaded zipper 5, and a fixed a needle 6, a bracket 7, a fixing strip 8 and a sliding T-frame 9, the cord string consisting of a cord 1 and a bead 21 worn on the cord, the cord 3 being composed of a pen tip 31 and a pen holder 32, the pen holder 32 is provided with a through hole 33 for wearing the cord 1 , the pen holder 32 is fixed on the bracket 7 , and the bead string zip pen 5 is composed of a brush 51 and The casing 52 is disposed on the brush 51 for fixing the bead string zipper 4, and the fixing pin 6 is composed of a fixed stylus tip 61 and a fixed stylus pen 62, the fixing pin The pen holder 62 is provided with a cord passing hole 63, and the cord passing hole 63 is provided with a rotating bolt 64, and the cord passing hole 63 of the fixing pin 6 is used for passing through the cord 1 or through the cord The end of the string 2 of the cord string 2, the rotating bolt 64 is used for fastening the cord, the bracket 7 is composed of a frame a71, a frame b72, a bolt 73 and a fixing member 74, the frame a71, the frame Body b72 through The bolts 73 are fixed on the fixing member 74, and the opening and closing of the frame body a71 and the frame body b72 are controlled by the bolts 73. The frame body 71 and the lower end of the frame body b72 are provided with a bayonet 75. A fixing pin 6 or a cord pen 3 is inserted, and the sliding T-bar 9 is provided with a fixing pin insertion hole 91 and a chute 92 for free sliding of the bead string zipper pen 5.

In this embodiment, the number of the fixing pins is two.

In this embodiment, the beads on the cord string 2 are equally spaced.

In this embodiment, the cord string 2 is two strings, and the cord string is threaded through the bead string zipper and synchronously slid in the bead string zipper.

The following is a detailed explanation of a quadratic curve plotter provided by the present invention in combination with specific embodiments. Said.

Example 1

Round drawing

Install the fixed needle and the cord pencil separately on the stylus holder, and use the compass to draw the circle.

Example 2

The drawing of the ellipse, as shown in Figure 7,

The equation for an ellipse is:

The embodiment provides a quadratic curve drawing apparatus, including a cord, a cord pen 3, a fixing pin 6, and a bracket 7. After the cord 1 passes through the cord pen 2, the two ends are fixed at the mounting. On the fixed needle 6 on the bracket 7, the flexible cord pen 3 can be moved to draw an ellipse.

Example 3

The hyperbola is drawn as shown in Figure 8.

The hyperbolic equation is:

A quadratic curve plotter provided by the embodiment includes a cord string 2, a beaded zipper clip 4, a beaded zipper pen 5, a fixed pin 6 and a bracket 7, and the cord string 2 is inserted through the beaded zipper clip 4 In the beaded zipper pen 5, one end of the cord string 2 is fixed to the fixing pin 6, and when the cord string 2 is pulled, the bead zipper pen 5 draws a hyperbola.

Example 4

The hyperbola is drawn as shown in Figure 9.

The hyperbolic equation is:

A quadratic curve plotter provided by the embodiment includes a cord string 2, a beaded zipper clip 4, a beaded zipper pen 5, a fixed pin 6, a fixed strip 8 and a sliding T-frame 9. The fixed pin 6 is provided. Fixed in the fixed pin insertion hole 91, and the other fixed pin 6 is fixed on the parabola

Wherein, one end of the cord string 2 is fixed on the fixing pin, and passes through the bead string zipper 4, and the bead string zipper 4 is inserted and fixed on the box 52 of the bead string zipper pen 5, and the T-frame 9 is slid. Moving up and down along the fixing strip to drive the bead string zipper pen 5 to slide along the chute 92, drawing a parabola, the beaded zipper pen 5 to the fixing strip 8 and

The distance at which the needle 6 is fixed is equal.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and combinations thereof may be made without departing from the spirit and scope of the invention. Simplifications should all be equivalent replacements and are included in the scope of the present invention.

Claims

A quadratic curve plotter, comprising: a cord, a cord string, a cord stringer, a beaded zipper clip, a beaded zipper pen, a fixed pin, a bracket, a fixed strip and a sliding T-frame. The cord string is composed of a cord and a bead worn on the cord, the cord pen consisting of a pen tip and a pen holder, and the pen holder is provided with a pass for wearing the cord a hole, the pen holder is fixed on the bracket, the bead string zipper is composed of a brush and a box body disposed on the brush, the box body is used for fixing the bead string zipper clip, the fixed pin The utility model is composed of a fixed needle tip and a fixed needle pen, wherein the fixed needle pen is provided with a soft wire through hole, and the flexible wire through hole is provided with a rotating bolt, the bracket is composed of a frame body a, a frame body b, and a bolt And the fixing member is configured, the frame body a and the frame body b are fixed on the fixing member by the bolt, and the opening and closing of the frame body a and the frame body b are controlled by the bolt, the frame body a And a lower end of the frame b is provided with a bayonet, and the sliding T-frame is provided with a fixed pin insertion hole and a sliding slot, The chute is used for free sliding of the bead string zipper.
A quadratic plotter according to claim 1, wherein said fixed pins are not less than two.
A quadratic plotter according to claim 1, wherein the beads on the cord string are equally spaced.
A quadratic plotter according to claim 1, wherein said cord string is not less than two strings, and said cord string is threaded through said bead string zipper clip and Simultaneous sliding in the beaded zipper clip.