CN205615215U - Convenient to use's mathematical education compasses - Google Patents
Convenient to use's mathematical education compasses Download PDFInfo
- Publication number
- CN205615215U CN205615215U CN201620241486.2U CN201620241486U CN205615215U CN 205615215 U CN205615215 U CN 205615215U CN 201620241486 U CN201620241486 U CN 201620241486U CN 205615215 U CN205615215 U CN 205615215U
- Authority
- CN
- China
- Prior art keywords
- compasses
- sliding sleeve
- arm
- screw
- lock
- 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
Links
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to a convenient to use's mathematical education compasses, including having the compasses arm scale, the platykurtic, the wide face upper band of compasses arm is scaled, and compasses arm one end is equipped with centre of a circle leg assembly, is equipped with the spout on the compasses arm, is equipped with the removal pen clip on the spout, and centre of a circle leg assembly is fixed with the sliding sleeve including rotation axis and sucking disc on the rotation axis, the sliding sleeve with slidable mode suit on the compasses arm, the screw thread is equipped with locking screw soon on the sliding sleeve, locking screw and compasses arm locking cooperation, the rotation axis lower extreme with rotatable mode cartridge on the sucking disc, the wide face of compasses arm and rotation axis axial are perpendicular arranging, the sliding sleeve is the platykurtic that the level is extended, locking screw locates the top of sliding sleeve, and locking screw is located the intermediate position at sliding sleeve top, and locking screw cooperates with the wide face width direction's of compasses arm intermediate position locking. Compared with the prior art, the utility model, the advantage that has is: convenience, convenient to use are observed to the scale in the use.
Description
Technical field
This utility model relates to a kind of teaching aid, the compass teaching aid for making circle that a kind of College Maths teacher uses.
Background technology
In the mathematical education of university, it is often necessary at blackboard upper drawing circle, most of teachers uses compasses to draw.But, the big compasses on Traditional Classroom is made up of two feet, and a foot has spur, and chalk is fixed at another angle, and such compasses can use on wooden blackboard.But when Glass blackboard upper drawing circle, ferrum point cannot be fixed, and i.e. cannot fix the center of circle；Additionally, this lambdoid compasses, handle from blackboard slightly away from, it is impossible to accurately control the radius of circle；When needing curve or the large-diameter circular drawing reducing and inconvenient.
For ease of teaching, China Patent No. is the compass teaching aid of 201320026113.X, and this compass teaching aid includes carrying graduated compasses arm, described compasses arm one end is sleeved in rotary shaft, being positioned at sucker bottom rotary shaft, compasses arm is provided with chute, equipped with mobile pen clip on chute.The centering of this compass teaching aid is drawn very convenient, and circular diameter adjusts simple.But as disclosed in its specification and drawings, the width of compasses arm is axial consistent with rotary shaft, so during mapping, scale face is at vertical direction, and vertical with the direction of visual lines of people, scale face is caused and blocked, observation for scale face causes the biggest inconvenience, is not easy to adjust.And the design of the lock solid structure of existing centre point is unreasonable, there is the unreliable and unhandy defect of locking.
Summary of the invention
The technical problem existed for existing compass teaching aid, this utility model is that the wide face providing a kind of compasses arm is vertical with rotary shaft, it is simple to during use, scale is observed conveniently, mathematical education compasses easy to use.
For achieving the above object, the technical solution of the utility model is:
nullA kind of mathematical education compasses easy to use，Include band graduated、The compasses arm of flat，With scale on the wide face of compasses arm，Compasses arm one end is provided with center of circle leg assembly，Compasses arm is provided with chute，Equipped with mobile pen clip on chute，Described center of circle leg assembly includes rotary shaft and sucker，Rotary shaft upper end is fixed with sliding sleeve，Described sliding sleeve is slidably sleeved on compasses arm，On described sliding sleeve, screw thread is installed with lock-screw，Lock-screw coordinates with the locking of compasses arm，Described rotary shaft lower end is rotatably inserted on sucker，It is characterized in that: the wide face of described compasses arm and the axial perpendicular layout of rotary shaft，The flat that described sliding sleeve extends horizontally，The top of sliding sleeve is located at by described lock-screw，Lock-screw is positioned at the centre position at sliding sleeve top，Lock-screw is locked with the centre position of the wide face width of compasses arm and is coordinated.
Technique scheme, by the wide face of compasses arm and the perpendicular layout of rotary shaft, the width making compasses arm faces up, consistent with people's sight line in use, it is simple to observe, and lock-screw is arranged on sliding sleeve top, it is easy to locking and conciliates latching operation, it is simple to the position of regulation center of circle assembly, the Position Design of lock-screw the most at any time, compasses scale can be avoided, it is to avoid the lock-screw infringement to scale.
As preferably: the rotary-top of described sliding sleeve is dynamic is combined with nut, nut portion exceeds the top of sliding sleeve and forms operating portion, the top of sliding sleeve is provided with the through hole coaxial with the screwed hole of nut, and described lock-screw screw thread spinning is in nut, and the locking end of lock-screw stretches in described through hole.When operation, rotatable nut, under the driving of screw thread, lock-screw realizes moving axially, thus realizes locking and conciliate latching operation, and structure is the compactest, operates more convenient；And the screw thread that nut facilitates lock-screw screws so that the installation of lock-screw is the most firm, having stable behavior.
As preferably: the operating portion circumferential side wall of described nut is provided with anti-slip veins.The most anti-skidding lines plays increase rubbing action so that easy to operate.
As preferably: the locking end end of described lock-screw is provided with flexible rubber pad.Flexible rubber pad can play a protective role, and can play elastic locking, and the locking to compasses arm is the most firm.
As preferably: the lateral sidewalls of described sliding sleeve is provided with the scale eye split extended along compasses arm width, and scale eye split is corresponding with the axial centerline of rotary shaft.So, can realize the central axis of rotary shaft by scale eye split and align with compasses arm high scale line, the determination in the center of circle is the most accurate, improves the accuracy of mapping.
As preferably: described rotary shaft is positioned at one end of sucker and is set with spring and connection has back of the body cap.When line, chalk slightly weares and teares, and can gently press the upper end of rotary shaft, make chalk end in contact blackboard, it is to avoid stops line adjustment chalk and wastes time.
As preferably: the described telescopic arm that compasses arm is adjustable-length.Compasses arm is set to the telescopic arm of adjustable-length, the used time nestable can not shorten, it is easy to carry, can be according to the amount of stretch compasses arm of radius or mobile pen clip during use, especially when looking for point-rendering curve according to radius of curvature, while rotating compasses arm, mobile pen clip, convenient accurate, thus add the functional of these compasses.
Below in conjunction with the accompanying drawings this utility model is further described.
Accompanying drawing explanation
Fig. 1 is the mathematical education compasses structural representation that this utility model is easy to use；
Fig. 2 is the mathematical education compasses top view that this utility model is easy to use；
Fig. 3 is part A partial enlarged view in Fig. 1.
Detailed description of the invention
nullSee accompanying drawing 1、Accompanying drawing 2 and accompanying drawing 3，A kind of mathematical education compasses easy to use disclosed in this utility model，Include band graduated、The compasses arm 1 of flat，With scale on the wide face of compasses arm 1，Compasses arm 1 one end is provided with center of circle leg assembly，Compasses arm 1 is provided with chute 11，Equipped with mobile pen clip 2 on chute 11，Described center of circle leg assembly includes rotary shaft 3 and sucker 4，Rotary shaft 3 upper end is fixed with sliding sleeve 31，Sliding sleeve 31 can be one-body molded with rotary shaft 3，Described sliding sleeve 31 is slidably sleeved on compasses arm 1，On described sliding sleeve 31, screw thread is installed with lock-screw 32，Lock-screw 32 coordinates with compasses arm 1 locking，Described rotary shaft 3 lower end is rotatably inserted on sucker 4，Wide of described compasses arm 1 and the axial perpendicular layout of rotary shaft 3，The flat that described sliding sleeve 31 extends horizontally，The top of sliding sleeve 31 is located at by described lock-screw 32，Lock-screw 32 is positioned at the centre position at sliding sleeve 31 top，Lock-screw 32 is locked with the centre position of the wide face width of compasses arm 1 and is coordinated.
The rotary-top of described sliding sleeve 31 is dynamic is combined with nut 33, it is provided with installing hole at the top of sliding sleeve 31, nut 33 end is provided with annular stop flange 331, annular stop flange 331 is rotatable in embedding installing hole, it is fixed with the spacing ring 34 being limited in installing hole by annular stop flange 331 at installing hole port, spacing ring 34 is spacing with defining flange 331 to be coordinated, nut 33 part exceeds the top of sliding sleeve and forms operating portion 332, nut easy installation and reliable, the top of sliding sleeve 31 is provided with the through hole coaxial with the screwed hole of nut 33, described lock-screw 32 screw thread spinning is in nut 33, the locking end of lock-screw 32 stretches in described through hole.Operating portion 332 circumferential side wall of described nut 33 is provided with anti-slip veins (not shown).When operation, rotatable nut, under the driving of screw thread, lock-screw realizes moving axially, thus realizes locking and conciliate latching operation, and structure is the compactest, operates more convenient；And the screw thread that nut facilitates lock-screw screws so that the installation of lock-screw is the most firm, having stable behavior.
Additionally, the locking end end of described lock-screw 32 is provided with flexible rubber pad 321.Flexible rubber pad can play a protective role, and can play elastic locking, and the locking to compasses arm is the most firm.The lateral sidewalls of described sliding sleeve 31 is provided with the scale eye split 311 extended along compasses arm 1 width, and scale eye split 311 is corresponding with the axial centerline of rotary shaft 3.So, can realize the central axis of rotary shaft by scale eye split and align with compasses arm high scale line, the determination in the center of circle is the most accurate, improves the accuracy of mapping.Described rotary shaft 3 is positioned at one end of sucker 4 and is set with spring 5 and connects and have back of the body cap 6.When line, chalk slightly weares and teares, and can gently press the upper end of rotary shaft, make chalk end in contact blackboard, it is to avoid stops line adjustment chalk and wastes time.
As preferably, described compasses arm 1 is the telescopic arm of adjustable-length.Compasses arm is set to the telescopic arm of adjustable-length, the used time nestable can not shorten, it is easy to carry, can be according to the amount of stretch compasses arm of radius or mobile pen clip during use, especially when looking for point-rendering curve according to radius of curvature, while rotating compasses arm, mobile pen clip, convenient accurate, thus add the functional of these compasses.
Claims (7)
- null1. mathematical education compasses easy to use，Include band graduated、The compasses arm of flat，With scale on the wide face of compasses arm，Compasses arm one end is provided with center of circle leg assembly，Compasses arm is provided with chute，Equipped with mobile pen clip on chute，Described center of circle leg assembly includes rotary shaft and sucker，Rotary shaft upper end is fixed with sliding sleeve，Described sliding sleeve is slidably sleeved on compasses arm，On described sliding sleeve, screw thread is installed with lock-screw，Lock-screw coordinates with the locking of compasses arm，Described rotary shaft lower end is rotatably inserted on sucker，It is characterized in that: the wide face of described compasses arm and the axial perpendicular layout of rotary shaft，The flat that described sliding sleeve extends horizontally，The top of sliding sleeve is located at by described lock-screw，Lock-screw is positioned at the centre position at sliding sleeve top，Lock-screw is locked with the centre position of the wide face width of compasses arm and is coordinated.
- Mathematical education compasses the most easy to use, it is characterized in that: the rotary-top of described sliding sleeve is dynamic is combined with nut, nut portion exceeds the top of sliding sleeve and forms operating portion, the top of sliding sleeve is provided with the through hole coaxial with the screwed hole of nut, described lock-screw screw thread spinning is in nut, and the locking end of lock-screw stretches in described through hole.
- Mathematical education compasses the most easy to use, it is characterised in that: the operating portion circumferential side wall of described nut is provided with anti-slip veins.
- 4. according to mathematical education compasses easy to use described in claim 1 or 2 or 3, it is characterised in that: the locking end end of described lock-screw is provided with flexible rubber pad.
- 5. according to mathematical education compasses easy to use described in claim 1 or 2 or 3, it is characterised in that: the lateral sidewalls of described sliding sleeve is provided with the scale eye split extended along compasses arm width, and scale eye split is corresponding with the axial centerline of rotary shaft.
- 6. according to mathematical education compasses easy to use described in claim 1 or 2 or 3, it is characterised in that: described rotary shaft is positioned at one end of sucker and is set with spring and connection has back of the body cap.
- 7. according to mathematical education compasses easy to use described in claim 1 or 2 or 3, it is characterised in that: the described telescopic arm that compasses arm is adjustable-length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620241486.2U CN205615215U (en) | 2016-03-25 | 2016-03-25 | Convenient to use's mathematical education compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620241486.2U CN205615215U (en) | 2016-03-25 | 2016-03-25 | Convenient to use's mathematical education compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205615215U true CN205615215U (en) | 2016-10-05 |
Family
ID=57031464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620241486.2U Expired - Fee Related CN205615215U (en) | 2016-03-25 | 2016-03-25 | Convenient to use's mathematical education compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205615215U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107284087A (en) * | 2017-07-19 | 2017-10-24 | 郑金风 | A kind of teaching aid compasses |
| CN110816128A (en) * | 2019-11-20 | 2020-02-21 | 韩登利 | Special drawing device of higher mathematics |
-
2016
- 2016-03-25 CN CN201620241486.2U patent/CN205615215U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107284087A (en) * | 2017-07-19 | 2017-10-24 | 郑金风 | A kind of teaching aid compasses |
| CN110816128A (en) * | 2019-11-20 | 2020-02-21 | 韩登利 | Special drawing device of higher mathematics |
| CN110816128B (en) * | 2019-11-20 | 2023-08-04 | 莱芜职业技术学院 | Drawing device special for higher mathematics |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205818752U (en) | College Mathematics Teaching compass teaching aid | |
| CN102632749B (en) | Drawing method of multifunctional combined drawing instrument | |
| CN205615215U (en) | Convenient to use's mathematical education compasses | |
| CN107139613A (en) | A kind of mathematics aided education device | |
| CN201646147U (en) | Multipurpose ruler-compass for teaching | |
| CN202608349U (en) | Multifunctional tape and compass | |
| CN207711657U (en) | A kind of educational compasses ruler of mathematics | |
| CN203681090U (en) | Combined compass set square | |
| CN202345180U (en) | Suction-disc-type multipurpose compasses | |
| CN203004798U (en) | Teaching aid-compass | |
| CN202463329U (en) | Novel compasses | |
| CN207808859U (en) | A kind of primary school math teaching ruler | |
| CN205255841U (en) | End formula compasses are made to duplex for mathematical education | |
| CN211138815U (en) | Compasses | |
| CN211493449U (en) | Compasses capable of randomly adjusting radius and length | |
| CN107554145A (en) | A kind of educational compasses | |
| CN207291430U (en) | A kind of teaching folding compasses | |
| CN202623698U (en) | Compass capable of setting diameter fast | |
| CN208277704U (en) | A kind of educational compasses of accurate Drawing radius | |
| CN208521488U (en) | A kind of Multifunctional teaching aid bar | |
| CN201592605U (en) | Teaching compasses | |
| CN201728995U (en) | Multifunctional teaching compass | |
| CN201646141U (en) | Sphere quantitative circle describing instrument | |
| CN206344601U (en) | Anti-slip energy-saving educational compasses | |
| CN204894894U (en) | Novel compasses are used in teaching |
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 |
Granted publication date: 20161005 Termination date: 20170325 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |