CN205439709U - Mathematical teaching rule - Google Patents
Mathematical teaching rule Download PDFInfo
- Publication number
- CN205439709U CN205439709U CN201521135508.9U CN201521135508U CN205439709U CN 205439709 U CN205439709 U CN 205439709U CN 201521135508 U CN201521135508 U CN 201521135508U CN 205439709 U CN205439709 U CN 205439709U
- Authority
- CN
- China
- Prior art keywords
- plectane
- rule
- rule body
- bevel protractor
- coordinates
- 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.)
- Expired - Fee Related
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a mathematical teaching rule, it contains drawing rule body (1), and bevel protractor (2) are outwards extended to the one end of this drawing rule body (1), bevel protractor (2) whole semicircular hollow out construction that is, bevel protractor (2) and drawing rule body (1) between be provided with and draw pole (3), the one end that should draw pole (3) is passed through hinge (15) and drawing rule body (1) rotation and is connected the cooperation, the other end of drawing rule body (1) is provided with drawing circle chi. The utility model discloses simple structure, convenient to use need not be with the help of angulation chi point -device angle of can drawing up in painting angle degree or measurement angle degree, the great drawing error that has reduced, and also need not be with the help of compasses when drawing the circle, direct on drawing the circle chi circle that can draw up, the great has shortened the time of drawing, has improved classroom efficiency.
Description
Technical field
This utility model relates to teaching aid technical field, is specifically related to a kind of Mathematical teaching rule.
Background technology
Existing mathematical education drawing rule is mostly split-type structural, use unusual inconvenience, store and bother the most very much, need could draw by protractor in particular for the when of drawing angle or measure angle, also just can draw by compasses when of drawing circle, time of not only drawing is longer, and classroom efficiency is greatly reduced, and the geometric graph drawn can exist certain error.
Utility model content
This utility model purpose is to provide a kind of Mathematical teaching rule, and it can efficiently solve the problem in the presence of background technology.
nullIn order to solve the problem in the presence of background technology，It comprises drawing rule body 1，One end of this drawing rule body 1 extends outward bevel protractor 2，The described the most semicircular engraved structure of bevel protractor 2，Drafting bar 3 it is provided with between described bevel protractor 2 and drawing rule body 1，One end of this drafting bar 3 is rotationally connected with drawing rule body 1 by hinge 15 and coordinates，The other end of described drawing rule body 1 is provided with picture circle chi，Described picture circle chi is by the first plectane 4、Second plectane 5、3rd plectane 6 and the 4th plectane 7 are socketed successively and are formed，It is rotationally connected between the first described plectane 4 and the second plectane 5 and coordinates，It is rotationally connected between the second described plectane 5 and the 3rd plectane 6 and coordinates，It is rotationally connected between the 3rd described plectane 6 and the 4th plectane 7 and coordinates，Described first plectane 4、Second plectane 5、A circle boss 8 is extended outward respectively at the circumference of the 3rd plectane 6 and the 4th plectane 7，The first described plectane 4、Second plectane 5、3rd plectane 6 and the 4th plectane 7 offer respectively and are available for the hole 9 that chalk inserts，The near middle of described drawing rule body 1 is provided with parallel rule 10，Its location slide 11 moved of laminating it is provided with on this parallel rule 10，The positioning seat 12 with its clearance sliding fit it is provided with on described location slide 11，The spiral knob 13 coordinated that spins with it it is provided with on this positioning seat 12，The end of this spiral knob 13 is in close contact with parallel rule 10.
The two bottom sides of described parallel rule 10 inwardly offers groove 14.
The edge of described drawing rule body 1, bevel protractor 2 and picture circle chi is respectively arranged with scale.
Owing to have employed above technical scheme, this utility model has the advantages that simple in construction, easy to use, need not to draw point-device angle by angle square drawing angle or measure angle when, it is greatly reduced rendering error, and also without by compasses drawing circle when, directly can draw a circle drawing on circle chi one, greatly shorten the time of drafting, improve classroom efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model, below in conjunction with accompanying drawing, embodiment is briefly described.
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation drawing circle chi part in this utility model；
Fig. 3 is the structural representation of parallel rule part in this utility model.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and be easy to understand with effect, below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described.
nullReferring to Fig. 1-3，This detailed description of the invention is to be achieved by the following technical solutions，It comprises drawing rule body 1，One end of this drawing rule body 1 extends outward bevel protractor 2，The described the most semicircular engraved structure of bevel protractor 2，Drafting bar 3 it is provided with between described bevel protractor 2 and drawing rule body 1，One end of this drafting bar 3 is rotationally connected with drawing rule body 1 by hinge 15 and coordinates，The other end of described drawing rule body 1 is provided with picture circle chi，Described picture circle chi is by the first plectane 4、Second plectane 5、3rd plectane 6 and the 4th plectane 7 are socketed successively and are formed，It is rotationally connected between the first described plectane 4 and the second plectane 5 and coordinates，It is rotationally connected between the second described plectane 5 and the 3rd plectane 6 and coordinates，It is rotationally connected between the 3rd described plectane 6 and the 4th plectane 7 and coordinates，Described first plectane 4、Second plectane 5、A circle boss 8 is extended outward respectively at the circumference of the 3rd plectane 6 and the 4th plectane 7，The first described plectane 4、Second plectane 5、3rd plectane 6 and the 4th plectane 7 offer respectively and are available for the hole 9 that chalk inserts，The near middle of described drawing rule body 1 is provided with parallel rule 10，Its location slide 11 moved of laminating it is provided with on this parallel rule 10，The positioning seat 12 with its clearance sliding fit it is provided with on described location slide 11，The spiral knob 13 coordinated that spins with it it is provided with on this positioning seat 12，The end of this spiral knob 13 is in close contact with parallel rule 10.
The two bottom sides of described parallel rule 10 inwardly offers groove 14.
The edge of described drawing rule body 1, bevel protractor 2 and picture circle chi is respectively arranged with scale.
Owing to have employed above technical scheme, this utility model has the advantages that simple in construction, easy to use, need not to draw point-device angle by angle square drawing angle or measure angle when, it is greatly reduced rendering error, and also without by compasses drawing circle when, directly can draw a circle drawing on circle chi one, greatly shorten the time of drafting, improve classroom efficiency.
Last it is noted that above example is only in order to illustrate the technical solution of the utility model, it is not intended to limit；Although being described in detail this utility model with reference to previous embodiment, it will be understood by those within the art that, the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of this utility model each embodiment technical scheme.
Claims (3)
- null1. a Mathematical teaching rule，It is characterized in that it comprises drawing rule body (1)，One end of this drawing rule body (1) extends outward bevel protractor (2)，Described bevel protractor (2) the most semicircular engraved structure，Drafting bar (3) it is provided with between described bevel protractor (2) and drawing rule body (1)，One end of this drafting bar (3) is rotationally connected with drawing rule body (1) by hinge (15) and coordinates，The other end of described drawing rule body (1) is provided with picture circle chi，Described picture circle chi is by the first plectane (4)、Second plectane (5)、3rd plectane (6) and the 4th plectane (7) are socketed successively and are formed，It is rotationally connected between described the first plectane (4) and the second plectane (5) and coordinates，It is rotationally connected between described the second plectane (5) and the 3rd plectane (6) and coordinates，It is rotationally connected between the 3rd described plectane (6) and the 4th plectane (7) and coordinates，Described first plectane (4)、Second plectane (5)、A circle boss (8) is extended outward respectively at the circumference of the 3rd plectane (6) and the 4th plectane (7)，Described the first plectane (4)、Second plectane (5)、3rd plectane (6) and the 4th plectane (7) offer respectively and are available for the hole (9) that chalk inserts，The near middle of described drawing rule body (1) is provided with parallel rule (10)，Its location slide (11) moved of laminating it is provided with on this parallel rule (10)，The positioning seat (12) with its clearance sliding fit it is provided with on described location slide (11)，The spiral knob (13) that being provided with on this positioning seat (12) spins with it coordinates，The end of this spiral knob (13) is in close contact with parallel rule (10).
- A kind of Mathematical teaching rule the most according to claim 1, it is characterised in that the two bottom sides of described parallel rule (10) inwardly offers groove (14).
- A kind of Mathematical teaching rule the most according to claim 1, it is characterised in that the edge of described drawing rule body (1), bevel protractor (2) and picture circle chi is respectively arranged with scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521135508.9U CN205439709U (en) | 2015-12-25 | 2015-12-25 | Mathematical teaching rule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521135508.9U CN205439709U (en) | 2015-12-25 | 2015-12-25 | Mathematical teaching rule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205439709U true CN205439709U (en) | 2016-08-10 |
Family
ID=56599498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521135508.9U Expired - Fee Related CN205439709U (en) | 2015-12-25 | 2015-12-25 | Mathematical teaching rule |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205439709U (en) |
-
2015
- 2015-12-25 CN CN201521135508.9U patent/CN205439709U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20161225 |