CN110774805A - Compasses for teaching - Google Patents

Compasses for teaching Download PDF

Info

Publication number
CN110774805A
CN110774805A CN201911075416.9A CN201911075416A CN110774805A CN 110774805 A CN110774805 A CN 110774805A CN 201911075416 A CN201911075416 A CN 201911075416A CN 110774805 A CN110774805 A CN 110774805A
Authority
CN
China
Prior art keywords
rod
cylinder
fixed rod
compasses
sliding device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911075416.9A
Other languages
Chinese (zh)
Inventor
关瑛
杜肖叶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi University of Science and Technology
Original Assignee
Shaanxi University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shaanxi University of Science and Technology filed Critical Shaanxi University of Science and Technology
Priority to CN201911075416.9A priority Critical patent/CN110774805A/en
Publication of CN110774805A publication Critical patent/CN110774805A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments
    • B43L9/02Compasses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments
    • B43L9/16Features common to compasses, dividers, and callipers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments
    • B43L9/16Features common to compasses, dividers, and callipers
    • B43L9/24Means for mounting points or writing appliances on legs

Abstract

A compass for teaching, comprising: the fixed rod is connected with the rotary rod through the head part of the connecting piece; the interior of the connecting piece is hollow and used for determining the circle center; the fixed rod is provided with an accommodating groove, and the head part of the fixed rod is connected with the rotary rod in an embedded manner; a sliding groove is formed in the rotating rod, a sliding device is installed on the sliding groove, a cylinder is embedded in the center of the sliding device, and the cylinder is hollow and used for embedding chalk; the upper surface of the fixed rod is provided with a size mark, and the sliding device drives the cylinder to slide to draw the radius of the circle; when the compasses are accommodated, the fixed rod is embedded in parallel with the head of the rotary rod, so that the tail of the rotary rod is embedded into the tail of the fixed rod, and meanwhile, the sliding device also enters the accommodating groove of the fixed rod, so that the cylinder on the sliding device is tangent to the fixed rod. Draw the circular arc through the cooperation of dead lever and rotary rod, it is high to have the drawing precision, uses stable advantage.

Description

Compasses for teaching
Technical Field
The invention belongs to the technical field of compasses, and particularly relates to a compass for teaching.
Background
When drawing in classroom teaching, compasses are often used for standard drawing. In the drawing process, when a teacher uses a common compass to draw, the position of the compass is too high and the compass is too large, so that the fixed part of the compass can move during drawing, or the compass is inconvenient to rotate, and errors are easy to generate during drawing.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the compasses for teaching, which solve the displacement error of the fixed part of the compasses in the prior art and have the characteristics of simple structure, simple operation and convenience.
In order to achieve the purpose, the invention adopts the technical scheme that: a compasses for teaching comprises a fixed rod which is rotationally connected with a rotary rod through a connecting piece; one side of the fixed rod corresponding to the rotary rod is provided with an accommodating groove; a sliding chute is arranged in the rotating rod, and a sliding device is arranged on the sliding chute; a cylinder is arranged on the sliding device; the cylinder is used for mounting chalk.
The upper surface of the fixed rod is provided with scale marks.
The inside of the connecting piece is in a hollow shape and used for determining the circle center.
The cylinder is tangent to the fixed rod when the compasses are closed, and the tangent position of the cylinder is provided with nicks.
The center of the connecting piece is used for determining the center of a circle or an arc.
Compared with the prior art, the invention has the following advantages:
the circular drawing machine has the advantages of high drawing precision and stable use. Meanwhile, the compasses can be stored and are convenient to carry. And secondly, the tip position of the ordinary compass fixing part is removed, and the compass fixing rod can be parallel to the drawing surface, so that the compass is not easy to hurt people and draw when in use. Scales are arranged on the surface of the fixed rod, notches on the cylinder correspond to the scales, the radius is directly read and adjusted, the drawing efficiency is improved, and convenience is brought to people.
The compasses for teaching provided by the invention have the advantages that the fixed part of the compasses is not easy to slide, and meanwhile, the compasses have the capability of directly adjusting the radius, so that the time is greatly saved, and the error is reduced.
Drawings
FIG. 1 is a schematic structural view of a compass used for teaching of the present invention.
Fig. 2 is a cross-sectional view of the fixing rod of the present invention.
Fig. 3 is a schematic cross-sectional view of a rotary lever according to the present invention.
Fig. 4 is a schematic structural diagram of the slider of the present invention.
Fig. 5 is a schematic cross-sectional view of a connector of the present invention.
Fig. 6 is a schematic view of the scale on the holder and the score on the cylinder of the present invention.
Detailed Description
The structural and operational principles of the present invention are explained in further detail below with reference to the accompanying drawings.
Referring to fig. 1, 2, 3 and 1, a compass for teaching comprises a fixed rod 1, wherein the fixed rod 1 is rotatably connected with a rotating rod 2 through a connecting piece 5; one side of the fixed rod 1 corresponding to the rotary rod 2 is provided with an accommodating groove; a sliding chute is arranged in the rotating rod 2, and a sliding device 3 is arranged on the sliding chute; a cylinder 4 is arranged on the sliding device 3; the cylinder 4 is used for mounting chalk.
The upper surface of the fixed rod 1 is provided with scale marks. The interior of the connecting piece 5 is hollow and used for determining the circle center. The sliding device 3 drives the cylinder 4 to slide to draw the radius of the circle. When the compasses are accomodate, decide the parallel of pole 1 and 2 link of rotary rod and inlay, and because be equipped with the spout in the rotary rod 2 for in the pole 1 is decided in the rotary rod 2 embedding, slider 3 also gets into in the spout of deciding pole 1 simultaneously. The center of a circle is fixed by the center of the connecting piece 5, the fixed rod 1 rotates the rotating rod 2, and an arc is drawn by matching the fixed rod 1 and the rotating rod 2.
The cylinder 4 is tangent to the fixed rod 1 when the compasses are closed. The tangent of the cylinder 4 is scored.
The center of the connecting piece 5 is used for determining the center of a circle or an arc.
When the compasses are accommodated, the fixed rod is embedded in parallel with the head of the rotary rod, so that the tail of the rotary rod is embedded into the tail of the fixed rod, and meanwhile, the sliding device also enters the accommodating groove of the fixed rod, so that the cylinder on the sliding device is tangent to the fixed rod.
The fixed rod 1 is connected with a rotating rod 2 through a head part of a connecting piece 5; the interior of the connecting piece 5 is hollow and used for determining the circle center; the fixed rod 1 is provided with an accommodating groove, and the head part of the fixed rod 1 is connected with the rotating rod 5 in an embedded manner; a sliding groove is formed in the rotating rod 2, a sliding device 3 is installed on the sliding groove, a cylinder 4 is embedded in the center of the sliding device 3, and the cylinder 4 is hollow and used for embedding chalk. The upper surface of the fixed rod 1 is marked with a dimension, and the sliding device 3 drives the cylinder 4 to slide to draw the radius of a circle. When the compasses were accomodate, dead lever 1 was inlayed with 2 prelude parallels of rotary rod for 2 afterbody embedding dead lever 1 afterbody of rotary rod, slider 3 also got into the holding tank of dead lever 1 simultaneously, made cylinder 4 on the slider 3 tangent with dead lever 1. An arc is drawn by the cooperation of the fixed rod 1 and the rotating rod 2.
The fixing rod 1 and the rotating rod 2 are rotatably connected, and the upper surface of the fixing rod 1 is provided with dimension scales.
The rotating rod 2 is internally provided with a sliding groove for installing the sliding device 3. The sliding device 3 is provided with a hollow cylinder 4, and chalk can be embedded in the cylinder 4.
Referring to fig. 4, the cylinder 4 is tangent to the fixed rod 1 when the compasses are closed, and the tangent position of the cylinder 4 is provided with a nick 6.
The heads of the fixed rod 1 and the rotating rod 2 can be embedded. The center of the connecting piece 5 can be used for determining the center of the circular arc.
The working principle of the invention is as follows:
the center of the connecting piece 5 is aligned to the circle center to be drawn, and the fixed rod 1 is closely tangent to the drawing plane. With chalk embedding cylinder 4, drive slider device 3 through cylinder 4 and carry out the adjustment of position for the nick on the cylinder 4 is corresponding with the scale on the dead lever, and rotatory rotary rod 2 is drawn. After the drawing is completed, the drawing is rotated back to the initial position and stored.

Claims (4)

1. A pair of compasses for teaching comprises a fixed rod (1), wherein the fixed rod (1) is rotatably connected with a rotating rod (2) through a connecting piece (5); one side of the fixed rod (1) corresponding to the rotary rod (2) is provided with an accommodating groove; a sliding chute is arranged in the rotating rod (2), and a sliding device (3) is arranged on the sliding chute; a cylinder (4) is arranged on the sliding device (3); the cylinder (4) is used for mounting chalk.
2. The compasses for teaching of claim 1, wherein the upper surface of said fixed bar (1) is provided with graduation marks.
3. Compasses for teaching according to claim 1, characterized in that said connecting element (5) is hollow inside.
4. The compasses of claim 1, wherein said cylinder (4) is tangent to said fixed shaft (1) when said compasses are closed, and the tangent position of said cylinder (4) is scored.
CN201911075416.9A 2019-11-06 2019-11-06 Compasses for teaching Pending CN110774805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911075416.9A CN110774805A (en) 2019-11-06 2019-11-06 Compasses for teaching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911075416.9A CN110774805A (en) 2019-11-06 2019-11-06 Compasses for teaching

Publications (1)

Publication Number Publication Date
CN110774805A true CN110774805A (en) 2020-02-11

Family

ID=69389439

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911075416.9A Pending CN110774805A (en) 2019-11-06 2019-11-06 Compasses for teaching

Country Status (1)

Country Link
CN (1) CN110774805A (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2035713U (en) * 1988-09-10 1989-04-12 曹爱军 Compass for blackboard drawing
CN2151015Y (en) * 1993-02-19 1993-12-29 申会生 Multifunctional angle ruler
CN2412755Y (en) * 2000-02-02 2001-01-03 郑鑫 Multi-purpose teaching ruler
CN2515038Y (en) * 2001-09-05 2002-10-09 李海荣 Combined teaching-aid
CN201169163Y (en) * 2008-01-30 2008-12-24 孙丽娟 Novel self-suction type compasses
CN201257850Y (en) * 2008-08-15 2009-06-17 秦元梅 Multi-purpose teaching aid
CN201264451Y (en) * 2008-07-17 2009-07-01 李岩 Multifunctional teaching aid
CN101544149A (en) * 2009-04-28 2009-09-30 陕西科技大学 Multifunctional drawing tool
CN201366884Y (en) * 2009-01-06 2009-12-23 东莞三协塑胶制品有限公司 Compasses capable of accommodating pen refill
CN201961014U (en) * 2011-01-19 2011-09-07 陈振宇 Sucker type cyclograph used for teaching
CN203528143U (en) * 2013-11-08 2014-04-09 马丽红 Teaching compasses facilitating drawing
CN206327053U (en) * 2016-08-26 2017-07-14 刘润盛 A kind of compasses for teaching
CN206510640U (en) * 2016-12-28 2017-09-22 闫晓璐 Collateral line rendering ruler

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2035713U (en) * 1988-09-10 1989-04-12 曹爱军 Compass for blackboard drawing
CN2151015Y (en) * 1993-02-19 1993-12-29 申会生 Multifunctional angle ruler
CN2412755Y (en) * 2000-02-02 2001-01-03 郑鑫 Multi-purpose teaching ruler
CN2515038Y (en) * 2001-09-05 2002-10-09 李海荣 Combined teaching-aid
CN201169163Y (en) * 2008-01-30 2008-12-24 孙丽娟 Novel self-suction type compasses
CN201264451Y (en) * 2008-07-17 2009-07-01 李岩 Multifunctional teaching aid
CN201257850Y (en) * 2008-08-15 2009-06-17 秦元梅 Multi-purpose teaching aid
CN201366884Y (en) * 2009-01-06 2009-12-23 东莞三协塑胶制品有限公司 Compasses capable of accommodating pen refill
CN101544149A (en) * 2009-04-28 2009-09-30 陕西科技大学 Multifunctional drawing tool
CN201961014U (en) * 2011-01-19 2011-09-07 陈振宇 Sucker type cyclograph used for teaching
CN203528143U (en) * 2013-11-08 2014-04-09 马丽红 Teaching compasses facilitating drawing
CN206327053U (en) * 2016-08-26 2017-07-14 刘润盛 A kind of compasses for teaching
CN206510640U (en) * 2016-12-28 2017-09-22 闫晓璐 Collateral line rendering ruler

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SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20200211

RJ01 Rejection of invention patent application after publication