阅读说明：本技术 一种便捷型椭圆规 (Convenient ellipsograph ) 是由 陈天星 陈熹民 徐洪亮 胡亚森 杨玉洁 袁标 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种便捷型椭圆规,包括箱壳；箱壳上设置有相配合的画图组件和锚定组件；锚定组件包括设置于箱壳底部的固定针脚和移动针脚；箱壳顶部设置有位于固定针脚上方的束线组件；束线组件内设置有线绳；线绳穿过固定针脚与移动针脚连接；画图组件包括镂空杆件和画针；镂空杆件转动设置于箱壳顶部；画针一端与镂空杆件活动连接,另一端与位于固定针脚和移动针脚之间的线绳连接。本发明使用方便,能够快速准确的对椭圆进行绘制,绘制精度高。(The invention discloses a convenient ellipsograph, which comprises a box shell; the box shell is provided with a drawing component and an anchoring component which are matched with each other; the anchoring component comprises a fixed pin and a movable pin which are arranged at the bottom of the box shell; the top of the box shell is provided with a wire harness component positioned above the fixed stitch; a wire rope is arranged in the wire harness component; the thread rope penetrates through the fixed stitch and is connected with the movable stitch; the drawing assembly comprises a hollow rod piece and a drawing needle; the hollow rod piece is rotatably arranged at the top of the box shell; one end of the drawing needle is movably connected with the hollowed-out rod piece, and the other end of the drawing needle is connected with a thread rope between the fixed stitch and the movable stitch. The invention has convenient use, can draw the ellipse quickly and accurately and has high drawing precision.)

1. a convenient ellipsograph is characterized by comprising a box shell; the box shell is provided with a drawing component and an anchoring component which are matched with each other;

The anchoring component comprises a fixed pin and a movable pin which are arranged at the bottom of the box shell; the top of the box shell is provided with a wire harness component positioned above the fixed pins; a wire rope is arranged in the wire harness component; the thread rope penetrates through the fixed stitch and is connected with the movable stitch;

the drawing assembly comprises a hollow rod piece and a drawing needle; the hollow rod piece is rotatably arranged at the top of the box shell; one end of the drawing needle is movably connected with the hollowed-out rod piece, and the other end of the drawing needle is connected with a thread rope between the fixed stitch and the movable stitch.

2. the portable ellipsograph according to claim 1, wherein a fixed shaft is provided at a midpoint of a top of said case; the fixing shaft is sleeved with a hollow rod piece which can rotate and is hollow, and a box shell shaft sealing cover which is positioned above the hollow rod piece is arranged on the fixing shaft.

3. The portable ellipsograph according to claim 2, wherein a U-shaped holding rod is slidably disposed in the hollow rod, and a horizontal rod cover is disposed at an opening end of the hollow rod; the other end of the holding rod is connected with the drawing needle.

4. the portable ellipsograph according to claim 1, wherein a pencil lead is embedded in the bottom of the drawing pin, and a wire groove for a wire rope to be embedded is formed in the drawing pin and above the pencil lead.

5. The portable ellipsograph according to claim 1, wherein a fixing pin is provided at a bottom of one end of the housing, and a sliding groove is formed on the housing; the sliding groove is provided with scale values, and a moving pin screwing device connected with a moving pin is arranged in the sliding groove in a sliding mode.

6. The portable ellipsometer according to claim 5, wherein said moving pin tightening device comprises a screw slidably disposed within a sliding slot; the screw rod is fixedly connected with the movable pin, and a nut which is matched with the screw rod through threads is arranged outside the box shell.

7. The portable ellipsograph according to claim 1, wherein said wire harness assembly comprises a fixed post and a stepped threaded fixed post in an integral structure above a fixed pin; the fixed column is arc-shaped and is fixed on the box shell; the ladder thread fixing shaft is sleeved with a wire spool which is rotatable and connected with a wire rope, and a wire locking disk which is connected with the ladder thread fixing shaft through threads and used for locking the wire spool.

8. The portable ellipsograph according to claim 7, wherein a fixing cavity fixed on the stepped threaded fixing shaft is formed at a side of the wire spool far from the wire locking plate; and a coil spring for driving the wire spool to rotate is arranged in the fixed cavity.

9. The portable ellipsograph according to claim 7, wherein the string is connected to the wire spool at one end, and connected to the moving pin through the case and the fixing pin at the other end, and a fastening plug for the string to pass through is movably installed on the case.

10. The portable ellipsograph according to claim 9, wherein the fastening plug is in the shape of an inverted triangle with the tip movably inserted into the housing.

Technical Field

the invention belongs to the technical field of teaching aids, and particularly relates to a convenient ellipsograph.

Background

An ellipse is a typical geometric figure, which is elegant in shape and agile in trajectory. People often need to use ellipses in learning, working, designing and creating. However, drawing an ellipse is always a difficult problem. Currently, common methods for drawing ellipses can be divided into two categories: one is by means of so-called ellipsoids, and the other is "approximation".

The existing ellipsograph has the following defects due to the problem of structural arrangement:

(1) The pencil independent of the structure is used for drawing lines, so that the error is large, the lines are positioned on a paper surface when drawing, the contact condition with a pen point is poor, and large friction exists;

(2) the adopted ruler has larger width, the center of the painting brush and the center line of the ruler are not on the same straight line, and the error is larger;

(3) The plane of the painting brush and the drawn graph cannot be guaranteed to be vertical all the time, and errors exist in the winding process;

(4) The drawing pen and the drawing plane can not be guaranteed to be perpendicular all the time, the flexible rule serves as a line, certain error exists in the result due to the width of the flexible rule, and the processing mode of the extending part of the flexible rule is unreasonable.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a convenient ellipsograph which can effectively solve the problem that the existing ellipsograph is inaccurate in drawing.

in order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:

A convenient ellipsograph comprises a box shell; the box shell is provided with a drawing component and an anchoring component which are matched with each other;

The anchoring component comprises a fixed pin and a movable pin which are arranged at the bottom of the box shell; the top of the box shell is provided with a wire harness component positioned above the fixed stitch; a wire rope is arranged in the wire harness component; the thread rope penetrates through the fixed stitch and is connected with the movable stitch;

The drawing assembly comprises a hollow rod piece and a drawing needle; the hollow rod piece is rotatably arranged at the top of the box shell; one end of the drawing needle is movably connected with the hollowed-out rod piece, and the other end of the drawing needle is connected with a thread rope between the fixed stitch and the movable stitch.

furthermore, a fixed shaft is arranged at the midpoint of the top of the box shell; the fixed shaft is sleeved with a hollow rod piece which can rotate and is hollow, and the fixed shaft is provided with a box shell shaft sealing cover which is positioned above the hollow rod piece.

Furthermore, a U-shaped holding rod is arranged in the hollow rod piece in a sliding manner, and a horizontal rod piece sealing cover is arranged at the opening end of the hollow rod piece; the other end of the holding rod is connected with the painting needle.

Furthermore, a pencil core is embedded into the bottom of the drawing pin, and a wire groove which is positioned above the pencil core and is used for embedding the wire rope is formed in the drawing pin.

furthermore, a fixing pin is arranged at the bottom of one end of the box shell, and a sliding groove is formed in the box shell; the sliding groove is provided with scale values, and a moving pin screwing device connected with a moving pin is arranged in the sliding groove in a sliding mode.

Further, the moving pin screwing device comprises a screw rod which is arranged in the sliding groove in a sliding manner; the screw rod is fixedly connected with the movable pin, and a nut which is matched with the screw rod through threads is arranged outside the box shell.

Furthermore, the wire harness assembly comprises a fixing column and a stepped thread fixing shaft which are located above the fixing pins and are of an integrated structure; the fixed column is arc-shaped and fixed on the box shell; the ladder thread fixing shaft is sleeved with a wire spool which is rotatable and connected with a wire rope, and a wire locking disk which is connected with the ladder thread fixing shaft through threads and used for locking the wire spool.

Furthermore, a fixing cavity fixed on the stepped thread fixing shaft is arranged on one side, away from the wire locking disc, of the wire winding disc; a coil spring which drives the wire spool to rotate is arranged in the fixing cavity.

Furthermore, one end of the cord is connected with the wire spool, the other end of the cord penetrates through the case shell and the fixed stitch to be connected with the movable stitch, and a fastening plug for the cord to penetrate is movably arranged on the case shell.

Furthermore, the fastening plug is in an inverted triangle shape, and the tip is movably embedded into the box shell.

Further, the cords are made of a low elasticity, low ductility material.

The invention has the beneficial effects that:

1. Through the cooperation of drawing subassembly, anchor subassembly and bunch subassembly, can be fast accurate draw the ellipse, and can control the length of the cotton rope that uses when drawing, satisfy the drawing of the ellipse of different sizes.

2. under the cooperation of the anchoring assembly and the wire harness assembly, the length of the wire rope can be accurately controlled, and the drawing precision is improved.

Drawings

FIG. 1 is a schematic structural view of the apparatus;

FIG. 2 is a schematic view of the construction of a wire harness assembly;

FIG. 3 is a schematic view of the installation of the mobile pin tightening device;

fig. 4 is an isometric view of the present device.

Wherein, 1, a box shell; 2. fixing pins; 3. moving the stitch; 4. a fixed shaft; 5. hollowing out the rod piece; 6. a box shell shaft sealing cover; 7. a holding rod; 8. a drawing needle; 9. a pencil lead; 10. a pencil cap; 11. a chute; 12. fixing a column; 13. a stepped threaded fixed shaft; 14. a wire spool; 15. a wire locking disc; 16. a cord; 17. covering the horizontal rod piece; 18. a screw; 19. a nut; 20. a coil spring; 21. and (5) fastening the plug.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.