CN110641209A - Universal drawing device for mathematics learning - Google Patents

Universal drawing device for mathematics learning Download PDF

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Publication number
CN110641209A
CN110641209A CN201911058241.0A CN201911058241A CN110641209A CN 110641209 A CN110641209 A CN 110641209A CN 201911058241 A CN201911058241 A CN 201911058241A CN 110641209 A CN110641209 A CN 110641209A
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CN
China
Prior art keywords
measuring
ruler
long
angle
drawing 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
CN201911058241.0A
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Chinese (zh)
Inventor
曾瑞玲
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201911058241.0A priority Critical patent/CN110641209A/en
Publication of CN110641209A publication Critical patent/CN110641209A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/001Mathematical drawing instruments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/005Portable combined drawing-aids including boards
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00Straightedges
    • B43L7/027Plural non-adjustable straightedges fixed at right angles
    • B43L7/0275Triangles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/24Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes

Abstract

The invention relates to the technical field of mathematics learning drawing devices, and discloses a universal drawing device for mathematics learning, which solves the problems that the prior mathematics drawing tool has single function, is inconvenient to use and carry and cannot be effectively combined for use, and comprises a right-angle triangular ruler, wherein the right-angle long edge of the right-angle triangular ruler is movably connected with a measuring long ruler, the right-angle short edge and the bevel edge at the top of the right-angle triangular ruler are engraved with a first measuring graduated scale, one side of the right-angle long edge at the top of the right-angle triangular ruler is provided with a linear groove, and one side at the top of the measuring long ruler is engraved with a second measuring graduated scale; this omnipotent drawing device is used in mathematics study's function is more various, can satisfy the demand of different drawings, and this omnipotent drawing device is concatenation integral type structure simultaneously to be convenient for dismantle the use and carry, and this omnipotent drawing device can effectually make up the use, the effectual quantity that reduces the drawing instrument has the practicality more.

Description

Universal drawing device for mathematics learning
Technical Field
The invention belongs to the technical field of drawing devices for mathematics learning, and particularly relates to a universal drawing device for mathematics learning.
Background
Mathematics is a subject of researching concepts such as quantity, structure, change, space, information and the like, and belongs to one of formal science from a certain angle; mathematics is generated from counting, computing, measuring and observing the shape and movement of objects through the use of abstraction and logical reasoning; mathematics has become part of the educational category in many countries and regions, and it is used in different fields including science, engineering, medicine, economics, finance, etc.
Various figures can be drawn to assist in learning in the process of mathematics learning, the current drawing tools are various in types, most of the tools only have the function of one drawing tool, so that various drawing tools need to be carried in the learning process, the use and carrying are inconvenient, and meanwhile, various drawing tools cannot be effectively combined for use, so that the practicability is lacked; therefore, in view of the current situation, a universal drawing device for mathematics learning is needed to solve the shortcomings of the current mathematics drawing tools.
Disclosure of Invention
Aiming at the situation, the invention provides the universal drawing device for mathematics learning to overcome the defects of the prior art, and effectively solves the problems that the prior mathematical drawing tool has single function, is inconvenient to use and carry and cannot be effectively combined for use.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a mathematics is learned with omnipotent drawing device, includes the right angle set square, the long limit swing joint in right angle of right angle set square has the measurement ruler, and the right angle minor face and the hypotenuse at right angle set square top all engrave and have first measurement scale, and the straight line groove has been seted up to the long limit in right angle at right angle set square top one side, and the one side of measuring the ruler top engraves and has the second to measure the scale, measures the one end fixedly connected with angular surveying ware at ruler top, and the opposite side movable mounting who measures the ruler top has the measurement drawing ruler, and the one end of measuring the ruler is equipped with the cutting part.
Preferably, the right-angle set square, the measuring long ruler, the angle measurer and the measuring drawing ruler are all made of transparent plastic materials.
Preferably, the two ends of one side of the long measuring ruler are fixedly provided with first powerful magnet blocks, and the two ends of the right-angle long edge of the right-angle triangular ruler are fixedly provided with third powerful magnet blocks.
Preferably, the other end of the measuring long ruler is fixedly provided with a second strong magnet block.
Preferably, one end of the top of the long measuring ruler, which is close to the cutting part, is fixedly provided with a fourth strong magnet block, the axis measured by the angle measurer is positioned at the top of the long measuring ruler and is provided with a connecting rotating hole, and a first alignment line is engraved between the fourth strong magnet block and the connecting rotating hole and is positioned at the top of the long measuring ruler.
Preferably, one side of the measuring drawing ruler is movably provided with a rotating part, the middle part of the top of the measuring drawing ruler is equidistantly provided with drawing round holes, and the top of each drawing round hole, which is positioned at the top of the measuring drawing ruler, is engraved with a second alignment line.
Preferably, a fifth strong magnet block is fixedly mounted on one side of the bottom of the measuring drawing ruler, which is far away from the rotating part.
Preferably, rotate the piece including perforation, intubate, inserted bar, according to piece, supporting shoe and centre of a circle bump, the perforation is seted up in one side of measuring the drawing ruler, and intubate fixed mounting is on fenestrate upper portion, and the inserted bar activity is pegged graft between perforation and intubate, according to piece and supporting shoe fixed connection at the both ends of inserted bar, and the supporting shoe is located fenestrate inside, and the centre of a circle bump is located the middle part of centre of a circle bump bottom.
Preferably, an auxiliary line is engraved in the middle of the linear groove and on the top of the right-angle triangular ruler, and the auxiliary line is perpendicular to the linear groove.
Preferably, cutting portion includes protective cover and cutting knife, and the movable card of protective cover is in the one end of measuring the long ruler, and cutting knife fixed connection just is located the inside of protective cover in the one end of measuring the long ruler, and equilateral triangle, regular pentagon, square and oval have been seted up at the middle part of right angle set square.
Compared with the prior art, the invention has the beneficial effects that:
(1) in the work, the universal drawing device for mathematics learning has more various functions and can meet the requirements of different drawings by arranging the right-angle set square, the measuring long ruler, the first measuring graduated scale, the linear groove, the auxiliary line, the second measuring graduated scale, the angle measurer, the measuring drawing ruler and the cutting part; the angle measuring device can effectively measure the angle by matching the angle measurer with the measuring drawing ruler, and can independently draw circles and sectors with different sizes by the measuring drawing ruler and effectively cut paper and the like by the cutting part;
(2) the universal drawing device for mathematics learning is of a splicing integrated structure by being provided with the first strong magnet block, the third strong magnet block, the fourth strong magnet block and the fifth strong magnet block, so that the universal drawing device for mathematics learning is convenient to disassemble, use and carry; the right-angle set square and the measuring long ruler can be stably and effectively connected through the use of the first strong magnet block and the third strong magnet block, and the measuring drawing ruler can be stably connected to the measuring long ruler through the use of the fourth strong magnet block and the fifth strong magnet block;
(3) through being provided with the second strong magnet piece, connect and rotate the hole, first alignment line, rotate the piece, the perforation, the intubate, the inserted bar, press the briquetting, the supporting shoe, centre of a circle bump, draw round hole and second alignment line, make this mathematics study can effectually use with the combination of omnipotent drawing device, the effectual quantity that reduces the drawing instrument, the practicality has more, be connected through second strong magnet piece and third strong magnet piece, make right angle set square and measurement length that the first measurement scale of extension can form a right angled region with the measurement length of measuring the ruler, connect through connecting and rotate the hole and rotate the piece and connect, make it carry out the measurement of angle, use through the cooperation that rotates piece and draw the round hole, can draw circle and fan-shaped of equidimension not.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic top view of the measuring tape of the present invention;
FIG. 3 is a schematic top-down view of the right triangle of the present invention;
FIG. 4 is a schematic view of a top-down structure of the measuring long ruler of the present invention;
FIG. 5 is a schematic view of a front cross-sectional structure of the measuring long ruler of the present invention;
FIG. 6 is a schematic view of a front cross-sectional structure of the measuring ruler according to the present invention;
FIG. 7 is a schematic view of a portion of the structure of FIG. 6 according to the present invention;
in the figure: 1. a right-angle set square; 2. measuring a long ruler; 3. a first measurement scale; 4. a linear groove; 401. an auxiliary line; 5. a second measurement scale; 6. an angle measurer; 7. measuring a drawing ruler; 8. a cutting section; 801. a protective cover; 802. cutting; 9. a first strong magnet block; 10. a second strong magnet block; 11. a third strong magnet block; 12. a fourth strong magnet block; 13. connecting the rotating hole; 14. a first alignment line; 15. a rotating member; 1501. perforating; 1502. inserting a tube; 1503. inserting a rod; 1504. a pressing block; 1505. a support block; 1506. a circle center salient point; 16. a fifth strong magnet block; 17. drawing a circular hole; 18. a second alignment line; 19. an equilateral triangle; 20. a regular pentagon; 21. a square shape; 22. an oval shape.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the first embodiment, as shown in fig. 1, 2, 3, 4, 5 and 6, the present invention includes a right angle triangular rule 1, a long right angle side of the right angle triangular rule 1 is movably connected with a long measuring rule 2, a first measuring scale 3 is engraved on both the short right angle side and the bevel side of the top of the right angle triangular rule 1, a straight line groove 4 is opened on one side of the long right angle side of the top of the right angle triangular rule 1, a second measuring scale 5 is engraved on one side of the top of the long measuring rule 2, an angle measuring device 6 is fixedly connected with one end of the top of the long measuring rule 2, the long measuring rule 2 has an angle measuring function by the arrangement of the angle measuring device 6, a measuring drawing rule 7 is movably installed on the other side of the top of the long measuring rule 2, the angle measuring by the arrangement of the measuring drawing rule 7 can be effectively assisted by the angle measuring scale 6, a circle can be independently drawn, one end of the long measuring rule 2 is provided, by providing the cutting section 8, a cutter can be provided when cutting is required.
In the second embodiment, as shown in fig. 1, the right-angle triangular rule 1, the measuring long rule 2, the angle measuring device 6, and the measuring drawing rule 7 are all made of transparent plastic, and thus can be used effectively.
In the third embodiment, on the basis of the first embodiment, as shown in fig. 3 and 4, the first strong magnet block 9 is fixedly mounted at both ends of one side of the long measurement ruler 2, the third strong magnet block 11 is fixedly mounted at both ends of the right-angle long side of the right-angle triangular ruler 1, and the right-angle triangular ruler 1 and the long measurement ruler 2 can be effectively connected and detached by the arrangement of the first strong magnet block 9 and the third strong magnet block 11.
In a fourth embodiment, as shown in fig. 1, 3 and 4, in addition to the first embodiment, the second strong magnet block 10 is fixedly attached to the other end of the long measurement scale 2, the right-angle triangle 1 and the long measurement scale 2 can be effectively used in combination by the arrangement of the second strong magnet block 10, the second strong magnet block 10 and the third strong magnet block 11 are attached to each other to form a right-angled region, and the measurement length of the first measurement scale 3 is extended.
In the fifth embodiment, as shown in fig. 2, a fourth strong magnet block 12 is fixedly mounted at one end of the top of the long measuring ruler 2 close to the cutting part 8, a connecting rotation hole 13 is formed at the position of the axis measured by the angle measuring device 6 and at the top of the long measuring ruler 2, and a first alignment line 14 is engraved at the top of the long measuring ruler 2 between the fourth strong magnet block 12 and the connecting rotation hole 13, so that the angle measuring device 6 can accurately and effectively perform measurement through the arrangement of the connecting rotation hole 13 and the first alignment line 14.
Sixth embodiment, on the basis of the first embodiment, as shown in fig. 1, 6 and 7, a rotating member 15 is movably installed at one side of the measuring drawing ruler 7, drawing round holes 17 are equidistantly formed in the middle of the top of the measuring drawing ruler 7, a second alignment line 18 is engraved on the top of each drawing round hole 17 and located on the top of the measuring drawing ruler 7, and the measuring drawing ruler 7 and the angle measuring device 6 can accurately measure angles by the aid of the rotating member 15, the drawing round holes 17 and the second alignment line 18, and meanwhile, the measuring drawing ruler 7 can independently draw circles with different diameters.
Seventh embodiment, in addition to the first embodiment, as shown in fig. 5 and 6, a fifth strong magnet 16 is fixedly mounted on the bottom of the measuring scale 7 on the side away from the rotating member 15, and the fifth strong magnet 16 is disposed so as to be effectively attracted to the fourth strong magnet 12, thereby keeping the measuring scale 7 stably attached to the surface of the measuring long scale 2.
Eighth embodiment, based on the sixth embodiment, as shown in fig. 7, the rotating member 15 includes a through hole 1501, an insertion pipe 1502, an insertion rod 1503, a pressing block 1504, a supporting block 1505, and a circle center salient point 1506, the through hole 1501 is formed at one side of the measurement drawing ruler 7, the insertion pipe 1502 is fixedly installed at the upper portion of the through hole 1501, the insertion rod 1503 is movably inserted between the through hole 1501 and the insertion pipe 1502, the pressing block 1504 and the supporting block 1505 are fixedly connected to two ends of the insertion rod 1503, the supporting block 1505 is located inside the through hole 1501, the circle center salient point 1506 is located at the middle of the bottom of the circle center salient point 1506, and the through hole 1501, the insertion pipe 1502, the insertion rod 1503, the pressing block 1504, the supporting block 1505, and the circle center salient point 1506 are arranged, so that the measurement drawing.
In the ninth embodiment, based on the first embodiment, as shown in fig. 1, an auxiliary line 401 may be engraved in the middle of the linear groove 4 and on the top of the right-angle triangular ruler 1, and the auxiliary line 401 is perpendicular to the linear groove 4, so that the linear groove 4 can conveniently and effectively draw two perpendicular straight lines.
Embodiment ten, on the basis of embodiment one, given by fig. 1, fig. 3, fig. 4 and fig. 5, cutting part 8 includes protective cover 801 and cutting knife 802, protective cover 801 activity card is in the one end of measuring long ruler 2, cutting knife 802 fixed connection is in the one end of measuring long ruler 2 and is located the inside of protective cover 801, through the setting of protective cover 801 and cutting knife 802, make cutting part 8 can be used safely effectual, equilateral triangle 19 has been seted up at the middle part of right angle set square 1, regular pentagon 20, square 21 and ellipse 22, make right angle set square 1 can be quick draw some conventional figures.
The working principle is as follows: drawing can be effectively performed by the right triangle rule 1 and the measuring long rule 2, and some conventional figures can be effectively performed by the combination of the angle measuring device 6 and the measuring drawing rule 7 (pressing the bottom of the rotation member 15 to the inside of the connecting rotation hole 13, then the measuring drawing rule 7 by rotating and aligning the first alignment line 14 and the second alignment line 18 to both sides of the measuring angle, and then displaying the size of the angle on the surface of the angle measuring device 6), while circles and sectors of different sizes can be drawn by the measuring drawing rule 7 alone (detaching the measuring drawing rule 7 from the measuring long rule 2, then fixing the measuring drawing rule 7 by the pressing block 1504, the supporting block 1505, and the circle center bump 1506, then inserting the pen into the inside of the circle drawing hole 17 and moving the measuring drawing rule 7 around the plunger 1503), and cutting the paper or the like efficiently by the cutting section 8; the right-angle triangular ruler 1 and the measuring long ruler 2 can be stably and effectively connected through the use of the first strong magnet block 9 and the third strong magnet block 11, and the measuring drawing ruler 7 can be stably connected to the measuring long ruler 2 through the use of the fourth strong magnet block 12 and the fifth strong magnet block 16; through being connected of second powerful magnet piece 10 and third powerful magnet piece 11, make right angle set square 1 and measure long chi 2 and can form a right angle region and prolong the first measurement scale 3's of measurement length, rotate the hole 13 and rotate the piece 15 through connecting and connect, make it can carry out the measurement of angle, use through the cooperation that rotates piece 15 and draw circle hole 17, can draw circle and fan-shaped of equidimension not.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a mathematics is learned with omnipotent drawing device, includes right angle set square (1), its characterized in that: the long limit swing joint in right angle of right angle set square (1) has measures long chi (2), the right angle minor face and the hypotenuse at right angle set square (1) top all engrave and have first measurement scale (3), straight line groove (4) have been seted up to the one side on the long limit in right angle at right angle set square (1) top, the one side of measuring long chi (2) top engraves and has the second to measure scale (5), measure one end fixedly connected with angular surveying ware (6) at long chi (2) top, the opposite side movable mounting at measurement long chi (2) top has measures drawing chi (7), the one end of measuring long chi (2) is equipped with cutting part (8).
2. The universal drawing device for mathematics learning as claimed in claim 1, wherein: the right-angle set square (1), the measuring long ruler (2), the angle measurer (6) and the measuring drawing ruler (7) are all made of transparent plastic materials.
3. The universal drawing device for mathematics learning as claimed in claim 1, wherein: the two ends of one side of the long measuring ruler (2) are fixedly provided with first powerful magnet blocks (9), and the two ends of the right-angle long edge of the right-angle triangular ruler (1) are fixedly provided with third powerful magnet blocks (11).
4. The universal drawing device for mathematics learning as claimed in claim 1, wherein: and a second strong magnet block (10) is fixedly arranged at the other end of the measuring long ruler (2).
5. The universal drawing device for mathematics learning as claimed in claim 1, wherein: one end of the top of the long measuring ruler (2) close to the cutting part (8) is fixedly provided with a fourth strong magnet block (12), the axis of the angle measuring device (6) is measured, the top of the long measuring ruler (2) is positioned at the axis, a connecting rotating hole (13) is formed in the top of the angle measuring device, and a first alignment line (14) is engraved in the top of the long measuring ruler (2) and between the fourth strong magnet block (12) and the connecting rotating hole (13).
6. The universal drawing device for mathematics learning as claimed in claim 1, wherein: one side movable mounting of measuring drawing chi (7) has rotation piece (15), and the middle part equidistance of measuring drawing chi (7) top has seted up and has drawn round hole (17), and the top of drawing round hole (17) just is located the top of measuring drawing chi (7) and has engraved second alignment line (18).
7. The universal drawing device for mathematics learning as claimed in claim 1, wherein: and a fifth strong magnet block (16) is fixedly arranged on one side of the bottom of the measuring drawing ruler (7) far away from the rotating part (15).
8. The universal drawing device for mathematics learning as claimed in claim 6, wherein: the rotating piece (15) comprises a through hole (1501), an insertion pipe (1502), an insertion rod (1503), a pressing block (1504), a supporting block (1505) and a circle center salient point (1506), the through hole (1501) is arranged on one side of the measuring drawing ruler (7), the insertion pipe (1502) is fixedly arranged on the upper portion of the through hole (1501), the insertion rod (1503) is movably inserted between the through hole (1501) and the insertion pipe (1502), the pressing block (1504) and the supporting block (1505) are fixedly connected to two ends of the insertion rod (1503), the supporting block (1505) is located inside the through hole (1501), and the circle center salient point (1506) is located in the middle of the bottom of the circle center salient point (1506).
9. The universal drawing device for mathematics learning as claimed in claim 1, wherein: auxiliary lines (401) are engraved in the middle of the linear grooves (4) and positioned at the top of the right-angle triangular ruler (1), and the auxiliary lines (401) are perpendicular to the linear grooves (4).
10. The universal drawing device for mathematics learning as claimed in claim 1, wherein: cutting portion (8) include protective cover (801) and cutting knife (802), and protective cover (801) activity card is in the one end of measuring long ruler (2), and cutting knife (802) fixed connection just is located the inside of protective cover (801) in the one end of measuring long ruler (2), and equilateral triangle (19), regular pentagon (20), square (21) and oval (22) have been seted up at the middle part of right angle set square (1).
CN201911058241.0A 2019-11-01 2019-11-01 Universal drawing device for mathematics learning Pending CN110641209A (en)

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Application Number Priority Date Filing Date Title
CN201911058241.0A CN110641209A (en) 2019-11-01 2019-11-01 Universal drawing device for mathematics learning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911058241.0A CN110641209A (en) 2019-11-01 2019-11-01 Universal drawing device for mathematics learning

Publications (1)

Publication Number Publication Date
CN110641209A true CN110641209A (en) 2020-01-03

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CN201911058241.0A Pending CN110641209A (en) 2019-11-01 2019-11-01 Universal drawing device for mathematics learning

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Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0413576A (en) * 1990-05-07 1992-01-17 Yasuhiko Yamato Inked ruler
JPH1016490A (en) * 1996-06-27 1998-01-20 Katsuhiro Yoshie Drafting tools
KR100225397B1 (en) * 1996-11-29 1999-10-15 신윤식 Device for determining circle center
CN202944096U (en) * 2012-12-03 2013-05-22 杨艳荣 Mathematics plotting instrument
CN103112289A (en) * 2013-03-13 2013-05-22 张佳乐 Ruler convenient to use
CN203172283U (en) * 2013-02-06 2013-09-04 段德强 Multifunctional teaching ruler
CN203496507U (en) * 2013-08-09 2014-03-26 刘效年 Multifunctional set square
CN204196534U (en) * 2014-11-16 2015-03-11 樊守芳 College Maths multifunctional drawing ruler
CN204367709U (en) * 2015-01-26 2015-06-03 杭州金南工量具有限公司 A kind of multi-functional triangular ruler
CN205149338U (en) * 2015-10-13 2016-04-13 徐州鼎龙自动化科技有限公司 Multifunctional ruler
CN107953704A (en) * 2017-12-26 2018-04-24 东莞唯度电子科技服务有限公司 A kind of mathematical education multifunctional drawing ruler
CN207772709U (en) * 2017-12-22 2018-08-28 杭州临安区安澜科技有限公司 A kind of mechanical drawing folding ruler
CN208558788U (en) * 2018-06-21 2019-03-01 咸阳师范学院 A kind of drawing tools for mathematics class
CN109774355A (en) * 2017-11-15 2019-05-21 陈静燕 A kind of polynary teaching aid device

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0413576A (en) * 1990-05-07 1992-01-17 Yasuhiko Yamato Inked ruler
JPH1016490A (en) * 1996-06-27 1998-01-20 Katsuhiro Yoshie Drafting tools
KR100225397B1 (en) * 1996-11-29 1999-10-15 신윤식 Device for determining circle center
CN202944096U (en) * 2012-12-03 2013-05-22 杨艳荣 Mathematics plotting instrument
CN203172283U (en) * 2013-02-06 2013-09-04 段德强 Multifunctional teaching ruler
CN103112289A (en) * 2013-03-13 2013-05-22 张佳乐 Ruler convenient to use
CN203496507U (en) * 2013-08-09 2014-03-26 刘效年 Multifunctional set square
CN204196534U (en) * 2014-11-16 2015-03-11 樊守芳 College Maths multifunctional drawing ruler
CN204367709U (en) * 2015-01-26 2015-06-03 杭州金南工量具有限公司 A kind of multi-functional triangular ruler
CN205149338U (en) * 2015-10-13 2016-04-13 徐州鼎龙自动化科技有限公司 Multifunctional ruler
CN109774355A (en) * 2017-11-15 2019-05-21 陈静燕 A kind of polynary teaching aid device
CN207772709U (en) * 2017-12-22 2018-08-28 杭州临安区安澜科技有限公司 A kind of mechanical drawing folding ruler
CN107953704A (en) * 2017-12-26 2018-04-24 东莞唯度电子科技服务有限公司 A kind of mathematical education multifunctional drawing ruler
CN208558788U (en) * 2018-06-21 2019-03-01 咸阳师范学院 A kind of drawing tools for mathematics class

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Application publication date: 20200103

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