CN110103616B - Compasses for drawing ellipses and perfect circles and using method thereof - Google Patents
Compasses for drawing ellipses and perfect circles and using method thereof Download PDFInfo
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- CN110103616B CN110103616B CN201910507895.0A CN201910507895A CN110103616B CN 110103616 B CN110103616 B CN 110103616B CN 201910507895 A CN201910507895 A CN 201910507895A CN 110103616 B CN110103616 B CN 110103616B
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- control shaft
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- shaft
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004804 winding Methods 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 8
- 230000001788 irregular Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L11/00—Non-circular-curve-drawing instruments
- B43L11/02—Non-circular-curve-drawing instruments for drawing conic sections
- B43L11/04—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses
- B43L11/045—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses with cords or like flexible elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L9/00—Circular curve-drawing or like instruments
- B43L9/02—Compasses
Abstract
The invention provides a compass for drawing ellipses and perfect circles and a use method thereof, comprising a main control shaft; the outer parts of the upper part and the middle part of the main control shaft are sleeved with main control shaft sleeves, and one side of each main control shaft sleeve is connected with an auxiliary control shaft; an elliptic center positioning needle is arranged at the bottom of the main control shaft; the bottom of the auxiliary control shaft is provided with a pencil lead fixing sleeve; a focus fixing shaft structure is arranged at the lower part of the main control shaft; the lower part of the pencil lead fixing sleeve is provided with a silk thread perforation, and silk threads are penetrated into the silk thread perforation and both sides of the lower part of the focus fixing shaft structure. The invention has the beneficial effects that: solves the problems that the existing compass for drawing ellipses has complicated operation, long drawing time and irregular drawing, can not draw ellipses and perfect circles one by one.
Description
Technical Field
The invention belongs to the technical field of drawing tools, and particularly relates to a compass for drawing ellipses and perfect circles and a using method thereof.
Background
In mathematics, an ellipse is a curve in a plane around two foci, such that for each point on the curve, the sum of the distances to the two foci is constant. It is therefore a generalization of a circle, which is a special type of ellipse with two foci at the same location. The shape of an ellipse (how "elongated") is represented by its eccentricity, which for an ellipse can be any number from 0 (limit of a circle) to any number that is close to but less than 1. The ellipse is a closed conical section: a planar curve intersected by the cone and the plane. Ellipses are very similar to other two forms of conical cross-section: parabolic and hyperbolic, both open and unbounded. The cross section of the cylinder is elliptical unless the cross section is parallel to the axis of the cylinder.
Oval drawing is often needed in a classroom, students also need to draw an oval in homework, but no special tool exists at present to enable a teacher to accurately draw the oval on a blackboard, and the oval is often drawn by bare hands. Thus not only being inaccurate, but also affecting the normal thinking of solving the problem of students. There are two types of instruments that can draw ellipses currently, as shown by the data. The first type is a traditional compass, which consists of a bottom plate of a cross-shaped chute, a rotary rod and a slider, and is formed by rotating the slider. However, the utility model is only a teaching aid at present due to the huge shape. And limited by the vertical and horizontal sliding grooves, the ellipses which can be drawn are very limited. The second type is an ellipsograph, which is an ellipsograph for students. However, the ellipsometer is complex to operate, the drawing process is clumsy, the drawn ellipses are not very standard, the key drawing time is long, and the ellipses can not meet the needs of people obviously.
In the prior art, tools capable of drawing ellipses and perfect circles at the same time do not exist, and when people draw perfect circles and ellipses, different tools need to be changed, so that the operation and the carrying are very inconvenient.
Therefore, it is necessary to invent a compass for drawing ellipses and perfect circles and a using method thereof.
Disclosure of Invention
In order to solve the technical problems, the invention provides the compass for drawing the ellipse and the perfect circle and the use method thereof, so as to solve the problems that the existing compass for drawing the ellipse is complex in operation, long in drawing time and nonstandard in drawing, can not draw one or two pictures, and can draw the ellipse and the perfect circle.
A compass for drawing ellipses and perfect circles comprises a main control shaft 2; the outer parts of the upper part and the middle part of the main control shaft 2 are sleeved with a main control shaft sleeve 1, and one side of the main control shaft sleeve 1 is connected with an auxiliary control shaft 3; an elliptical heart positioning needle 6 is arranged at the bottom of the main control shaft 2; the bottom of the auxiliary control shaft 3 is provided with a pencil lead fixing sleeve 4; a focus fixing shaft structure 5 is arranged at the lower part of the main control shaft 2; the lower part of the pencil lead fixing sleeve 4 is provided with a silk thread perforation 8, and silk threads 7 are penetrated on two sides of the lower part of the focus fixing shaft structure 5 and in the silk thread perforation 8.
Preferably, the focus fixing shaft structure 5 comprises a connecting plate 501, an internal thread groove 502, a movable connecting shaft 503, a connecting block 504, a focus positioning needle 505, a hole 506 without threads, a positioning screw 508 and a spiral vertical rod 509; the internal thread groove 502 is longitudinally formed in the middle position inside the connecting plate 501; the movable connecting shafts 503 are respectively connected with the left side and the right side of the connecting plate 501 in a shaft way; the connecting block 504 is connected to the lower end of the movable connecting shaft 503 in a shaft way; the focus positioning needle 505 is embedded in the middle position of the lower surface of the connecting block 504; the unthreaded hole 506 is transversely formed in the middle position inside the connecting block 504; the positioning screw 508 is connected with the unthreaded hole 506 in a penetrating way; the spiral vertical rod 509 is in threaded connection with the internal thread groove 502.
Preferably, the main control shaft 2 comprises a sleeve spring thin rod 21, a thin rod spring 22, a supporting seat 23, a toggle groove 24 arranged at the head of a spiral vertical rod, a focus fixing shaft structure arranging box 25 and a threaded hole 26; the integrated supporting seat 23 that is equipped with in cover spring slender rod 21 bottom, supporting seat 23 bottom fixedly connected with spiral montant head is placed and is stirred groove 24, spiral montant head is placed and is stirred groove 24 bottom fixedly connected with focus fixed axle construction and is placed box 25, focus fixed axle construction is placed box 25 bottom intermediate position and is offered threaded hole 26.
Preferably, the spiral montant head placing and stirring groove 24 is semi-circular, and is matched with the size of the head of the spiral montant 509, the head of the spiral montant 509 is embedded into the spiral montant head placing and stirring groove 24, and the spiral montant head placing and stirring groove 24 is semi-circular, so that the head of the spiral montant 509 is exposed at half sides, and the user finger stirring operation is facilitated.
Preferably, the height of the spiral vertical rod head placing toggle groove 24 is larger than or equal to the width of a human finger, so that the user can conveniently dial the finger.
Preferably, the support seat 23 is cylindrical.
Preferably, a sleeve spring thin rod groove 11 and a supporting seat groove 12 are formed in the main control shaft sleeve 1, the sleeve spring thin rod groove 11 and the supporting seat groove 12 are communicated in a penetrating mode, and the shape of the sleeve spring thin rod groove is matched with the shape of the sleeve spring thin rod 21 and the shape of the supporting seat 23 respectively.
Preferably, the diameter of the thin rod spring 22 is larger than the diameter of the sleeve spring thin rod groove 11 and smaller than the diameter of the supporting seat 23.
Preferably, a hole for conveniently placing and inserting the spiral vertical rod 509 is formed in the top of the focus fixing shaft structure placing box 25, and the front side and the rear side of the focus fixing shaft structure placing box 25 are not closed, so that the focus fixing shaft structure 5 is conveniently placed and inserted.
Preferably, a wire winding wheel 507 is further screwed at the middle position of the outer upper part of the connecting block 504 on the left side, a wire end perforation 510 is arranged at the lower edge of the connecting block 504 on the left side, the left end of the wire 7 passes through the wire end perforation 510 on the left side and is fixed on the wire winding wheel 507, and the right end of the wire 7 is fixed on the connecting block 504 on the right side.
Preferably, the wire winding wheel 507 is screwed to the middle position of the outer upper part of the left connecting block 504 and the right connecting block 504, the wire end perforation 510 is arranged at the lower edge of the left connecting block 504 and the lower edge of the right connecting block 504, the left end of the wire 7 passes through the left wire end perforation 510 and is fixed on the left wire winding wheel 507, and the right end of the wire 7 passes through the right wire end perforation 510 and is fixed on the right wire winding wheel 507.
Preferably, the left side of main control axle sleeve 1 still is provided with draws circle fixed establishment 9, draw circle fixed establishment 9 includes supporting spring 91, lock nut 92 and adjusting threaded rod 93, adjusting threaded rod 93's left end fixed connection is in main control axle sleeve 1's right side lower part intermediate position, adjusting threaded rod 93's left side surface cover have supporting spring 91, vertical bar through-hole 31 has been seted up to auxiliary control axle 3's well upper portion intermediate position, adjusting threaded rod 93's right-hand member transversely runs through auxiliary control axle 3 bar through-hole 31, lock nut 92 threaded connection is in adjusting threaded rod 93's surface right side position.
Preferably, the width of the bar-shaped through hole 31 is smaller than the diameter of the supporting spring 91 and larger than the diameter of the adjusting threaded rod 93.
Preferably, a top nut 10 is arranged at the top of the sleeve spring thin rod 21, a threaded through hole 101 is formed in the middle position inside the lower surface of the top nut 10, and the threaded through hole 101 is in threaded connection with the sleeve spring thin rod 21.
Preferably, the main control shaft sleeve 1 is rotationally connected with the auxiliary control shaft 3 through a U-shaped connecting rod 13, the opening end of the U-shaped connecting rod 13 is fixedly connected with the right side of the main control shaft sleeve 1, the closed end of the U-shaped connecting rod 13 is a shaft end, and the U-shaped connecting rod transversely penetrates through the top of the auxiliary control shaft 3.
Preferably, the bottom of the main control shaft sleeve 1 is sleeved at the middle position of the supporting seat 23.
Preferably, the middle portion of the positioning screw 508 is provided with threads for screwing with the threaded hole 26.
Preferably, the positioning screw 508 has a plurality of different length models for drawing ellipses of different sizes. For example, when an ellipse with a focal length of 2-3cm is to be drawn, a positioning screw 508 with a length of 3cm is selected; when an ellipse with a focal length of 3-4cm is to be drawn, a positioning screw 508 with a length of 4cm is selected; when an ellipse with a focal length of 4-5cm is to be drawn, a set screw 508 of 5cm length is selected.
Preferably, the connecting plate 501 is a T-shaped stainless steel plate.
Preferably, the lock nut 92 is disposed on the right side of the secondary control shaft.
Preferably, one end of the supporting spring 91 is connected with the right lower part of the main control shaft sleeve 1 by a screw, and the other end is connected with the left side of the auxiliary control shaft 3 by a screw.
The using method of the compass for drawing ellipses and perfect circles comprises the following steps:
when an ellipse is drawn, a positioning screw rod 508 with the length which is not much different from the focal length of twice of the drawn ellipse is selected, and the positioning screw rod 508 sequentially passes through the left unthreaded hole 506, the threaded hole 26 and the right unthreaded hole 506 to form a straight line;
then the rotary spiral vertical rod 509 is shifted to realize the lifting of the connecting plate 501, the distance between the focus positioning needle 505 and the elliptical heart positioning needle 6 is adjusted, the distance between the left focus positioning needle and the right focus positioning needle is equal to the drawn elliptical focal length, at the moment, the elliptical heart positioning needle 6 is positioned on the elliptical center, and the elliptical heart positioning needle 6 and the two focus positioning needles 505 are in contact with the paper surface;
then the main control shaft sleeve 1 is pressed downwards, the main control shaft sleeve 1 drives the auxiliary control shaft 3 to keep balance with the main control shaft 2 under the action of the thin rod spring 22, the wire winding wheel 507 is rotated, the distance between the pencil lead fixing sleeve 4 and the elliptical center positioning needle 6 is equal to the value of a or b (a is half-length shaft length and b is half-short shaft length), and the wires in the wire perforation 8 are in a straight state; at this time, the distance required by the elliptical core positioning needle 6, the two focus positioning needles 505 and the pencil head in the pencil core fixing sleeve 4 is adjusted completely and is contacted with the paper surface at the same time;
rotating the auxiliary control shaft 3 for half a circle, driving the pencil head in the pencil lead fixing sleeve 4 by the auxiliary control shaft 3 to draw one half of an ellipse, then rotating the auxiliary control shaft 3 to the opposite side, and then rotating the auxiliary control shaft for half a circle to draw the other half of the ellipse;
when a perfect circle needs to be drawn, the spiral vertical rod 509 is shifted to lift the focus fixing shaft structure 5 upwards, so that the two focus positioning needles 505 are higher than the elliptical core positioning needle 6, then the positions of the elliptical core positioning needle 6 and the pencil core fixing sleeve 4 are adjusted according to the diameter of the perfect circle, namely the radius of the circle, the lock nut 92 is rotated leftwards from the right end of the adjusting threaded rod 93 to be in contact with the auxiliary control shaft 3, and the pencil core fixing sleeve can be used as a compass for drawing the perfect circle.
The beneficial effects of the invention are as follows:
1. the invention combines ellipse drawing and circle drawing into a whole, and when people draw the whole circle and ellipse, tools are not required to be changed, so that the invention is very convenient to operate and carry, and has two purposes.
2. The invention has the advantages of simple and quick operation, short drawing time, high efficiency and standard drawing specification no matter whether drawing an ellipse or a perfect circle.
3. The invention utilizes the coordination of silk thread and focus fixed shaft structure, main control shaft and auxiliary control shaft, and can draw standard ellipse according to focal length, semi-major axis a or semi-minor axis b.
4. According to the pencil lead fixing sleeve, the pencil lead fixing sleeve is beneficial to fixing an elliptical pencil, so that slipping is prevented, and convenience in drawing an ellipse is improved.
5. According to the invention, the silk thread winding wheel is beneficial to connecting and fixing silk threads, and the elliptical focal length is convenient to adjust.
6. According to the invention, the setting of the focus positioning needle can accurately determine the focus, is beneficial to shaping and fixing the compasses, and prevents movement in the drawing process.
7. In the invention, the arrangement of the main control shaft and the spiral vertical rod is beneficial to adjusting the lifting of the focus fixing shaft structure according to the requirement, thereby increasing the convenience of use.
8. In the invention, the positioning screw rod penetrates through the threaded hole and the unthreaded hole, thereby being beneficial to adjusting and positioning and being convenient for adjusting the distance between the focus positioning needle and the focus positioning needle.
9. According to the invention, the lock nut and the adjusting threaded rod are arranged, so that the auxiliary control shaft is favorably unfolded, the angle is adjusted, and the drawing accuracy is ensured.
10. According to the invention, the supporting spring is beneficial to playing a role of supporting and buffering, so that the main shaft and the auxiliary shaft are in a straightened state.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the main control shaft of the present invention.
Fig. 3 is a schematic structural view of the main control sleeve of the present invention.
Fig. 4 is a schematic view of the structure of the focus fixing shaft of the present invention mounted on the main control shaft.
Fig. 5 is a schematic structural view of a focus fixing shaft structure of the present invention.
Fig. 6 is a schematic structural view of a focus fixing shaft structure double wire winding wheel of the present invention.
Fig. 7 is a schematic structural view of the auxiliary control shaft of the present invention.
Fig. 8 is a schematic view of the structure of the top nut of the present invention.
Fig. 9 is a schematic structural view of the connection block of the present invention.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings:
in the figure:
1. a main control shaft sleeve; 11. sleeving a spring thin rod groove; 12. supporting seat groove
2. A main control shaft; 21. sleeving a spring thin rod; 22. a thin rod spring; 23. a support base; 24. a toggle groove is arranged at the head part of the spiral vertical rod; 25. a focus fixing shaft structure placing box; 26. a threaded bore;
3. an auxiliary control shaft; 31. strip-shaped through hole
4. A pencil lead fixing sleeve;
5. a focus fixing shaft structure; 501. A connecting plate; 502. an internal thread groove; 503. a movable connecting shaft; 504. a connecting block; 505. a focus positioning needle; 506. the screw hole is not arranged; 507. a wire winding wheel; 508. positioning a screw; 509. a spiral vertical rod; 510. perforating the end of the silk thread;
6. elliptic centre positioning needle
7. A silk thread;
8. perforating the silk thread;
9. a circle drawing fixing mechanism; 91. a support spring; 92. a lock nut; 93. adjusting threaded rod
10. A top nut; 101. a through hole;
13. a U-shaped connecting rod;
examples
As shown in fig. 1, 4 and 5, an ellipse drawing compass comprises a main control shaft 2; the outer parts of the upper part and the middle part of the main control shaft 2 are sleeved with a main control shaft sleeve 1, and one side of the main control shaft sleeve 1 is connected with an auxiliary control shaft 3; an elliptical heart positioning needle 6 is embedded at the bottom of the main control shaft 2; the bottom of the auxiliary control shaft 3 is provided with a pencil lead fixing sleeve 4, and the bottom of the auxiliary control shaft 3 is fixedly connected with the pencil lead fixing sleeve 4 through screws; a focus fixing shaft structure 5 is arranged at the lower part of the main control shaft 2; a silk thread perforation 8 is arranged at the lower part of the pencil lead fixing sleeve 4, and silk threads 7 are penetrated at the left side of the lower part of the focus fixing shaft structure 5, the silk thread perforation 8 and the right side of the lower part of the focus fixing shaft structure 5;
the focus fixing shaft structure 5 comprises a connecting plate 501, an internal thread groove 502, a movable connecting shaft 503, a connecting block 504, a focus positioning needle 505, a hole 506 without threads, a positioning screw 508 and a spiral vertical rod 509; the internal thread groove 502 is longitudinally formed in the middle position inside the connecting plate 501; the movable connecting shafts 503 are respectively connected with the left side and the right side of the connecting plate 501 in a shaft way; the connecting block 504 is connected to the lower end of the movable connecting shaft 503 in a shaft way; the focus positioning needle 505 is embedded in the middle position of the lower surface of the connecting block 504; the unthreaded hole 506 is transversely formed in the middle position inside the connecting block 504; the positioning screw 508 is connected with the unthreaded hole 506 in a penetrating way; the spiral vertical rod 509 is in threaded connection with the internal thread groove 502;
as shown in fig. 2, in the above embodiment, specifically, the main control shaft 2 includes a sleeve spring thin rod 21, a thin rod spring 22, a supporting seat 23, a toggle groove 24 placed on the head of the spiral vertical rod, a focus fixing shaft structure placing box 25 and a threaded hole 26; the bottom of the sleeve spring thin rod 21 is integrally connected with the supporting seat 23, the bottom of the supporting seat 23 is fixedly connected with the spiral vertical rod head placing toggle groove 24, the bottom of the spiral vertical rod head placing toggle groove 24 is fixedly connected with the focus fixed shaft structure placing box 25, and a threaded hole 26 is formed in the middle of the bottom of the focus fixed shaft structure placing box 25.
In the above embodiment, specifically, the spiral vertical rod head placing and stirring groove 24 is in a semicircular shape, which is matched with the head of the spiral vertical rod 509, and the head of the spiral vertical rod 509 is embedded into the spiral vertical rod head placing and stirring groove 24, and since the spiral vertical rod head placing and stirring groove 24 is in a semicircular shape, the head of the spiral vertical rod 509 is exposed at half side, which is convenient for the user to stir.
In the above embodiment, specifically, the height of the dial groove 24 placed on the head of the spiral vertical rod is greater than or equal to the width of the finger, so as to facilitate the user's finger to dial.
In the above embodiment, specifically, the supporting seat 23 is cylindrical.
In the above embodiment, as shown in fig. 3, specifically, the main control sleeve 1 is provided with a sleeve spring thin rod groove 11 and a supporting seat groove 12, where the sleeve spring thin rod groove 11 and the supporting seat groove 12 are communicated through, and the shapes of the sleeve spring thin rod 11 and the supporting seat groove are respectively matched with those of the sleeve spring thin rod 21 and the supporting seat 23. When the main control shaft sleeve 1 is sleeved on the main control shaft 2, the sleeve spring thin rod 21 penetrates through the sleeve spring thin rod groove 11, the upper portion of the supporting seat groove 12 is contacted with the thin rod spring 22, and when the balance degree of the main control shaft 2 and the auxiliary control shaft 3 needs to be adjusted in the ellipse drawing process, the main control shaft sleeve is only required to be pressed downwards or loosened upwards, and the adjustment work can be well performed under the action of the thin rod spring.
In the above embodiment, specifically, the diameter of the thin rod spring 22 is larger than the diameter of the thin rod groove 11 of the sleeve spring and smaller than the diameter of the supporting seat 23.
As shown in fig. 2, 4 and 5, in the above embodiment, specifically, a hole for conveniently placing and inserting the spiral vertical rod 509 is formed at the top of the focus fixing shaft structure placing box 25, and the front and rear sides of the focus fixing shaft structure placing box 25 are not sealed, so that the focus fixing shaft structure 5 is conveniently placed and inserted. When the focus fixed shaft structure 5 is placed, the spiral vertical rod 509 passes through a hole at the top of the focus fixed shaft structure placing box 25, so that the head of the spiral vertical rod 509 is placed in the spiral vertical rod head placing toggle groove 24, and then the spiral vertical rod 509 is in threaded connection with the internal thread groove 502, so that the focus fixed shaft structure 5 can be inserted into the focus fixed shaft structure placing box 25. In the process of drawing an ellipse, when the focus fixing shaft structure 5 needs to be lifted according to specific situations, the lifting of the focus fixing shaft structure 5 can be realized only by pulling the spiral vertical rod 509 with a finger.
In the above embodiment, as shown in fig. 5, specifically, the middle position of the outer upper portion of the left connecting block 504 is further screwed with a wire winding wheel 507, the middle of the lower edge of the left connecting block 504 is provided with a wire end perforation 510 (as shown in fig. 9, the wire perforation 510 may be a through hole formed in the middle of the lower edge of the front side of the connecting block 504, or a small ring may be fixedly glued to the middle of the lower edge of the connecting block 504, for inserting the wire 7), the left end of the wire 7 passes through the left wire end perforation 510 and is fixed on the wire winding wheel 507, and the right end of the wire 7 is fixed on the right connecting block 504. When it is desired to adjust the length of the wire, the wire winding wheel 507 may be rotated.
As shown in fig. 6, in the above embodiment, specifically, the middle positions of the outer upper portions of the left connecting block 504 and the right connecting block 504 are respectively connected with a wire winding wheel 507 in a threaded manner, the middle parts of the lower edges of the left connecting block 504 and the right connecting block 504 are respectively provided with a wire end perforation 510, the left end of the wire 7 passes through the left wire end perforation 510 and is fixed on the left wire winding wheel 507, the right end of the wire 7 passes through the right wire end perforation 510 and is fixed on the right wire winding wheel 507, and when the length of the wire 7 needs to be adjusted, the required wire length can be achieved by rotating the left wire winding wheel 507 and the right wire winding wheel 507 respectively.
As shown in fig. 1 and 7, in the foregoing embodiment, specifically, the left side of the main control shaft sleeve 1 is further provided with a circle drawing fixing mechanism 9, the circle drawing fixing mechanism 9 includes a supporting spring 91, a lock nut 92 and an adjusting threaded rod 93, the left end of the adjusting threaded rod 93 is in threaded connection with the middle position of the lower right side of the main control shaft sleeve 1, the left outer surface of the adjusting threaded rod 93 is sleeved with the supporting spring 91, the middle position of the middle upper part of the auxiliary control shaft 3 is provided with a vertical bar-shaped through hole 31, the right end of the adjusting threaded rod 93 transversely penetrates through the bar-shaped through hole 31 of the auxiliary control shaft 3, and the lock nut 92 is in threaded connection with the right side position of the outer surface of the adjusting threaded rod 93. When a perfect circle needs to be drawn, the spiral vertical rod 509 is shifted to lift the focus fixing shaft structure 5 upwards, so that the two focus positioning needles 505 are higher than the elliptical core positioning needle 6, then after the positions of the elliptical core positioning needle 6 and the pencil core fixing sleeve 4 are adjusted according to the diameter of the perfect circle, the lock nut 92 can be rotated leftwards from the right end of the adjusting threaded rod 93 to be in contact with the auxiliary control shaft 3.
In the above embodiment, specifically, the width of the strip-shaped through hole 31 is smaller than the diameter of the supporting spring 91 and larger than the diameter of the adjusting threaded rod 93.
As shown in fig. 1 and 8, in the above embodiment, specifically, the top of the sleeve spring thin rod 21 is provided with a top nut 10, a threaded through hole 101 is provided in a middle position inside the lower surface of the top nut 10, and the threaded through hole 101 is in threaded connection with the sleeve spring thin rod 21.
As shown in fig. 1, in the foregoing embodiment, specifically, the main control shaft sleeve 1 is rotatably connected with the auxiliary control shaft 3 by a U-shaped connecting rod 13, an open end of the U-shaped connecting rod 13 is fixedly connected with the right side of the main control shaft sleeve 1, and a closed end of the U-shaped connecting rod 13 is a shaft end and traverses through the top of the auxiliary control shaft 3.
As shown in fig. 1, in the above embodiment, specifically, the bottom of the main control sleeve 1 is sleeved on the middle position of the supporting seat 23.
In the above embodiment, as shown in fig. 5, specifically, the middle portion of the positioning screw 508 is provided with a thread for screwing with the threaded hole 26.
In the above embodiment, specifically, the positioning screw 508 has several types with different lengths, so as to draw ellipses with different sizes. For example, when an ellipse with a focal length of 2-3cm is to be drawn, a positioning screw 508 with a length of 3cm is selected; when an ellipse with a focal length of 3-4cm is to be drawn, a positioning screw 508 with a length of 4cm is selected; when an ellipse with a focal length of 4-5cm is to be drawn, a set screw 508 of 5cm length is selected.
As shown in fig. 1, in the above embodiment, specifically, the inclination angle of the pencil lead fixing sleeve 4 is 60 degrees.
In the above embodiment, specifically, the wire perforation 8 at the lower part of the pencil lead fixing sleeve 4 is a perforation formed at the inner side of the lower part of the pencil lead fixing sleeve 4, or is a small ring glued at the inner side of the lower part of the pencil lead fixing sleeve 4.
In the above embodiment, specifically, the connection plate 501 is a T-shaped stainless steel plate.
In the above embodiment, specifically, one end of the supporting spring 91 is screwed to the right lower portion of the main control shaft sleeve 1, and the other end is screwed to the left side of the auxiliary control shaft 3.
Principle of operation
When an ellipse is drawn, a positioning screw rod 508 with the length which is not much different from the focal length of twice of the drawn ellipse is selected, and the positioning screw rod 508 sequentially passes through the left unthreaded hole 506, the threaded hole 26 and the right unthreaded hole 506 to form a straight line;
then the rotary spiral vertical rod 509 is shifted to realize the lifting of the connecting plate 501, the distance between the focus positioning needle 505 and the elliptical heart positioning needle 6 is adjusted, the distance between the left focus positioning needle and the right focus positioning needle is equal to the drawn elliptical focal length, at the moment, the elliptical heart positioning needle 6 is positioned on the elliptical center, and the elliptical heart positioning needle 6 and the two focus positioning needles 505 are in contact with the paper surface;
then the main control shaft sleeve 1 is pressed downwards, the main control shaft sleeve 1 drives the auxiliary control shaft 3 to keep balance with the main control shaft 2 under the action of the thin rod spring 22, the wire winding wheel 507 is rotated, the distance between the pencil core fixing sleeve 4 and the elliptical center positioning needle 6 is equal to the value of a or b (a is half-length shaft length and b is half-short shaft length), and the wires in the wire perforation 8 are in a straight state; at this time, the distance required by the elliptical core positioning needle 6, the two focus positioning needles 505 and the pencil head in the pencil core fixing sleeve 4 is adjusted completely and is contacted with the paper surface at the same time;
rotating the auxiliary control shaft 3 for half a circle, driving the pencil head in the pencil lead fixing sleeve 4 by the auxiliary control shaft 3 to draw one half of an ellipse, then rotating the auxiliary control shaft 3 to the opposite side, and then rotating the auxiliary control shaft for half a circle to draw the other half of the ellipse;
when a perfect circle needs to be drawn, the spiral vertical rod 509 is shifted to lift the focus fixing shaft structure 5 upwards, so that the two focus positioning needles 505 are higher than the elliptical core positioning needle 6, then the positions of the elliptical core positioning needle 6 and the pencil core fixing sleeve 4 are adjusted according to the diameter of the perfect circle, namely the radius of the circle, the lock nut 92 is rotated leftwards from the right end of the adjusting threaded rod 93 to be in contact with the auxiliary control shaft 3, and the pencil core fixing sleeve can be used as a compass for drawing the perfect circle.
By using the technical scheme of the invention or under the inspired by the technical scheme of the invention, a similar technical scheme is designed by a person skilled in the art, so that the technical effects are achieved, and the technical effects fall into the protection scope of the invention.
Claims (6)
1. Compasses for drawing ellipses and perfect circles, characterized in that it comprises a main control shaft (2); the outer parts of the upper part and the middle part of the main control shaft (2) are sleeved with a main control shaft sleeve (1), and one side of the main control shaft sleeve (1) is connected with an auxiliary control shaft (3); an elliptical center positioning needle (6) is arranged at the bottom of the main control shaft (2); the bottom of the auxiliary control shaft (3) is provided with a pencil lead fixing sleeve (4); a focus fixing shaft structure (5) is arranged at the lower part of the main control shaft (2); a silk thread perforation (8) is arranged at the lower part of the pencil lead fixing sleeve (4), silk threads (7) are penetrated on two sides of the lower part of the focus fixing shaft structure (5) and in the silk thread perforation (8);
the focus fixing shaft structure (5) comprises a connecting plate (501), an internal thread groove (502), a movable connecting shaft (503), a connecting block (504), a focus positioning needle (505), a hole without threads (506), a positioning screw (508) and a spiral vertical rod (509); the internal thread groove (502) is longitudinally formed in the middle position inside the connecting plate (501); the movable connecting shafts (503) are respectively connected with the left side and the right side of the connecting plate (501) in a shaft way; the connecting block (504) is connected to the lower end of the movable connecting shaft (503) in a shaft way; the focus positioning needle (505) is embedded in the middle position of the lower surface of the connecting block (504); the non-threaded hole (506) is transversely formed in the middle position inside the connecting block (504); the positioning screw rod (508) is connected with the unthreaded hole (506) in a penetrating way; the spiral vertical rod (509) is in threaded connection with the internal thread groove (502);
the main control shaft (2) comprises a sleeve spring thin rod (21), a thin rod spring (22), a supporting seat (23), a toggle groove (24) arranged at the head of the spiral vertical rod, a focus fixing shaft structure arranging box (25) and a threaded hole (26); the bottom of the spring sleeving thin rod (21) is integrally provided with the supporting seat (23), the bottom of the supporting seat (23) is fixedly connected with the spiral vertical rod head placing poking groove (24), the bottom of the spiral vertical rod head placing poking groove (24) is fixedly connected with the focus fixing shaft structure placing box (25), and the middle position of the bottom of the focus fixing shaft structure placing box (25) is provided with the threaded hole (26);
a sleeve spring thin rod groove (11) and a supporting seat groove (12) are formed in the main control shaft sleeve (1), the sleeve spring thin rod groove (11) and the supporting seat groove (12) are communicated in a penetrating mode, and the shape of the sleeve spring thin rod groove is matched with the shape of the sleeve spring thin rod (21) and the shape of the supporting seat (23) respectively; the left side of main control axle sleeve (1) still is provided with drawing circle fixed establishment (9), drawing circle fixed establishment (9) are including supporting spring (91), lock nut (92) and adjusting threaded rod (93), the left end fixed connection of adjusting threaded rod (93) is in the right side lower part intermediate position of main control axle sleeve (1), the left side surface cover of adjusting threaded rod (93) have supporting spring (91), vertical bar through-hole (31) have been seted up to the well upper portion intermediate position of assisting control axle (3), the right-hand member of adjusting threaded rod (93) transversely runs through assisting bar through-hole (31) of control axle (3), lock nut (92) threaded connection is in the surface right side position of adjusting threaded rod (93).
2. The compass for drawing ellipses and perfect circles according to claim 1, wherein the spiral vertical rod head placing toggle groove (24) is semi-circular and is matched with the head of the spiral vertical rod (509), and the head of the spiral vertical rod (509) is embedded into the spiral vertical rod head placing toggle groove (24).
3. The compass for drawing ellipses and perfect circles according to claim 1, wherein a wire winding wheel (507) is further screwed at the middle position of the outer upper portion of the left connecting block (504), a wire end through hole (510) is provided at the lower edge of the left connecting block (504), the left end of the wire (7) passes through the left wire end through hole (510) and is fixed on the wire winding wheel (507), and the right end of the wire (7) is fixed on the right connecting block (504).
4. The compass for drawing ellipses and perfect circles according to claim 1, wherein a wire winding wheel (507) is respectively screwed at the middle positions of the outer upper parts of the left connecting block (504) and the right connecting block (504), wire end perforations (510) are respectively arranged at the lower edge of the left connecting block (504) and the lower edge of the right connecting block (504), the left end of the wire (7) passes through the left wire end perforations (510) and is fixed on the left wire winding wheel (507), and the right end of the wire (7) passes through the right wire end perforations (510) and is fixed on the right wire winding wheel (507).
5. The compass for drawing ellipses and perfect circles according to claim 1, wherein a top screw cap (10) is arranged at the top of the sleeve spring thin rod (21), a threaded through hole (101) is formed in the middle position inside the lower surface of the top screw cap (10), and the threaded through hole (101) is in threaded connection with the sleeve spring thin rod (21); the main control shaft sleeve (1) is rotationally connected with the auxiliary control shaft (3) through a U-shaped connecting rod (13), the opening end of the U-shaped connecting rod (13) is fixedly connected with the right side of the main control shaft sleeve (1), the closed end of the U-shaped connecting rod (13) is a shaft end, and the U-shaped connecting rod transversely penetrates through the top of the auxiliary control shaft (3).
6. The method of using the compass for drawing ellipses and perfect circles according to claim 1, wherein the method of using the compass for drawing ellipses and perfect circles comprises the following steps:
when an ellipse is drawn, a positioning screw rod (508) with the length which is not greatly different from the focal length of twice of the drawn ellipse is selected, and the positioning screw rod (508) sequentially passes through the left unthreaded hole (506), the threaded hole (26) and the right unthreaded hole (506) to form a straight line;
then, the rotary spiral vertical rod (509) is shifted to realize lifting of the connecting plate (501), the distance between the focus positioning needle (505) and the elliptical center positioning needle (6) is adjusted, the distance between the left focus positioning needle and the right focus positioning needle is equal to the drawn elliptical focal length, at the moment, the elliptical center positioning needle (6) is positioned on the elliptical center, and the elliptical center positioning needle (6) and the two focus positioning needles (505) are in contact with the paper surface;
then the main control shaft sleeve (1) is pressed downwards, the main control shaft sleeve (1) drives the auxiliary control shaft (3) to keep balance with the main control shaft (2) under the action of the thin rod spring (22), the silk thread winding wheel (507) is rotated, the distance between the pencil lead fixing sleeve (4) and the elliptical core positioning needle (6) is equal to the value of the half long shaft length a or the half short shaft length b, and silk threads in the silk thread perforation (8) are in a straight state; at the moment, the distance required by the pencil heads in the elliptical center positioning needle (6), the two focus positioning needles (505) and the pencil core fixing sleeve (4) is adjusted completely and simultaneously contacts with the paper surface;
rotating the auxiliary control shaft (3) for half a circle, driving the pencil head in the pencil lead fixing sleeve (4) by the auxiliary control shaft (3) to draw one half of an ellipse, then rotating the auxiliary control shaft (3) to the opposite side, and then rotating the auxiliary control shaft for half a circle to draw the other half of the ellipse;
when a right circle is required to be drawn, the focus fixing shaft structure (5) is lifted upwards by stirring the spiral vertical rod (509), so that the two focus positioning needles (505) are higher than the elliptical core positioning needle (6), then the positions of the elliptical core positioning needle (6) and the pencil core fixing sleeve (4) are adjusted according to the diameter of the right circle, namely, the radius of the circle, the locking nut (92) is rotated leftwards from the right end of the adjusting threaded rod (93) to be contacted with the auxiliary control shaft (3), the auxiliary control shaft (3) is driven to rotate by the main control shaft sleeve (1), and the pencil head in the pencil core fixing sleeve (4) is driven by the auxiliary control shaft (3) to draw the right circle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910507895.0A CN110103616B (en) | 2019-06-12 | 2019-06-12 | Compasses for drawing ellipses and perfect circles and using method thereof |
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| CN201910507895.0A CN110103616B (en) | 2019-06-12 | 2019-06-12 | Compasses for drawing ellipses and perfect circles and using method thereof |
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| CN110103616B true CN110103616B (en) | 2024-01-23 |
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|---|---|---|---|---|
| CN2411902Y (en) * | 1999-12-29 | 2000-12-27 | 帕尔哈提·努尔 | Ellipsograph |
| CN2472965Y (en) * | 2001-04-13 | 2002-01-23 | 克孜尔哈力·乔吉汗 | Ellipsograph |
| CN2611179Y (en) * | 2002-11-04 | 2004-04-14 | 董明 | Standard ellipsograph |
| CN202006677U (en) * | 2011-03-16 | 2011-10-12 | 南昌航空大学 | Elliptic trammel |
| CN102582325A (en) * | 2011-01-04 | 2012-07-18 | 百顺 | Adjustable ellipse compasses |
| CN204659293U (en) * | 2015-06-11 | 2015-09-23 | 范佳琪 | A kind of multifunction ellipse compasses |
| CN210416027U (en) * | 2019-06-12 | 2020-04-28 | 杨胜强 | Compasses for drawing ellipse and circle |
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2019
- 2019-06-12 CN CN201910507895.0A patent/CN110103616B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2411902Y (en) * | 1999-12-29 | 2000-12-27 | 帕尔哈提·努尔 | Ellipsograph |
| CN2472965Y (en) * | 2001-04-13 | 2002-01-23 | 克孜尔哈力·乔吉汗 | Ellipsograph |
| CN2611179Y (en) * | 2002-11-04 | 2004-04-14 | 董明 | Standard ellipsograph |
| CN102582325A (en) * | 2011-01-04 | 2012-07-18 | 百顺 | Adjustable ellipse compasses |
| CN202006677U (en) * | 2011-03-16 | 2011-10-12 | 南昌航空大学 | Elliptic trammel |
| CN204659293U (en) * | 2015-06-11 | 2015-09-23 | 范佳琪 | A kind of multifunction ellipse compasses |
| CN210416027U (en) * | 2019-06-12 | 2020-04-28 | 杨胜强 | Compasses for drawing ellipse and circle |
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| CN110103616A (en) | 2019-08-09 |
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