CN205818752U - College Mathematics Teaching compass teaching aid - Google Patents
College Mathematics Teaching compass teaching aid Download PDFInfo
- Publication number
- CN205818752U CN205818752U CN201620240914.XU CN201620240914U CN205818752U CN 205818752 U CN205818752 U CN 205818752U CN 201620240914 U CN201620240914 U CN 201620240914U CN 205818752 U CN205818752 U CN 205818752U
- Authority
- CN
- China
- Prior art keywords
- screw
- lock
- sliding sleeve
- compasses arm
- compasses
- 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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Abstract
This utility model relates to a kind of College Mathematics Teaching compass teaching aid, 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, described lock-screw is arranged along the width of described compasses arm, lock-screw screw thread spinning is at the top of sliding sleeve, the locking end of lock-screw is locked with the upper surface of compasses arm and is coordinated.This utility model compared with prior art, have the advantage that for: lock solid and reliable, it is to avoid scale face damage, regulate easy to operate, service life is long.
Description
Technical field
This utility model relates to a kind of teaching aid, the compasses religion for making circle that a kind of College Maths teacher uses
Tool.
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,
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 be
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 herringbone
The compasses of shape, handle from blackboard slightly away from, it is impossible to accurately control the radius of circle；When needing to draw curve or the large-diameter circular of reducing
Time, and inconvenient.
For ease of teaching, China Patent No. is the compass teaching aid of 201320026113.X, and this compass teaching aid included with quarter
The compasses arm of degree, described compasses arm one end is sleeved in rotary shaft, is positioned at sucker bottom rotary shaft, and compasses arm is provided with cunning
Groove, equipped with mobile pen clip on chute.The centering of this compass teaching aid is drawn very convenient, and circular diameter adjusts simple.But such as its explanation
Disclosed in book and accompanying drawing, lock-screw uses the scale face towards compasses arm to lock, during life-time service, and locking
Screw can damage scale face, and the thickness direction that locking direction is compasses arm of lock-screw, misoperation is easily caused circle
Rule brachiocylloosis, reduces service life.
Summary of the invention
The technical problem existed for existing compass teaching aid, this utility model is to provide a kind of College Mathematics Teaching compasses
Teaching aid, locks solid and reliable, it is to avoid scale face is damaged, and regulates easy to operate, and service life is long.
For achieving the above object, the technical solution of the utility model is:
A kind of College Mathematics Teaching compass teaching aid, includes with graduated, the compasses arm of flat, the wide face of compasses arm
On be provided with center of circle leg assembly with scale, compasses arm one end, compasses arm is provided with chute, equipped with mobile pen clip, institute on chute
Stating center of circle leg assembly and include rotary shaft and sucker, rotary shaft upper end is fixed with sliding sleeve, and described sliding sleeve is with slidably side
Formula is sleeved on compasses arm, and on described sliding sleeve, screw thread is installed with lock-screw, and lock-screw coordinates with the locking of compasses arm, described
Rotary shaft lower end is rotatably inserted on sucker, and the wide face of compasses arm is consistent with the axial direction of rotary shaft, and it is special
Levy and be: described lock-screw along described compasses arm width arrange, lock-screw screw thread spinning at the top of sliding sleeve,
The locking end of lock-screw is locked with the upper surface of compasses arm and is coordinated.
Technique scheme, is arranged on sliding sleeve top by lock-screw, then lock-screw is lived along the width of compasses
Dynamic, the upper surface (leptoprosopy) of compasses arm is locked, effectively avoids compasses scale, it is to avoid the lock-screw infringement to scale,
And compasses arm is bigger along the intensity on width, avoids locking the excessive compasses arm bending hidden danger caused completely.
As preferably: the rotary-top of described sliding sleeve is dynamic is combined with nut, nut portion exceeds the top of sliding sleeve and is formed
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, in nut, is locked
The locking end of tight screw stretches in described through hole.When operation, rotatable nut, under the driving of screw thread, lock-screw realizes
Moving axially, thus realize locking and conciliate latching operation, structure is the compactest, operates more convenient；And nut facilitates locking screw
The screw thread of nail 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 guarantor
Protecting effect, and can play elastic locking, 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,
Scale eye split is corresponding with the axial centerline of rotary shaft.So, the central shaft of rotary shaft can be realized by scale eye split
Line aligns with compasses arm high scale line, and 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, makes chalk end in contact blackboard, it is to avoid when stopping line adjustment chalk delays
Between.
As preferably: the described telescopic arm that compasses arm is adjustable-length.Compasses arm is set to the telescopic arm of adjustable-length, no
Used time is nestable can be shortened, it is simple to carry, and especially can exist according to the amount of stretch compasses arm of radius or mobile pen clip during use
When looking for point-rendering curve according to radius of curvature, while rotating compasses arm, mobile pen clip, convenient accurate, thus add this
Compasses functional.
Below in conjunction with the accompanying drawings this utility model is further described.
Accompanying drawing explanation
Fig. 1 is this utility model College Mathematics Teaching compass teaching aid structural representation；
Fig. 2 is part A partial enlarged view in Fig. 1.
Detailed description of the invention
Seeing accompanying drawing 1, accompanying drawing 2, disclosed in this utility model, a kind of College Mathematics Teaching compass teaching aid, included with quarter
Degree, 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, and 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, and sliding sleeve 31 can be one-body molded with rotary shaft 3, and described sliding sleeve 31 slidably overlaps
Being contained on compasses arm 1, on described sliding sleeve 31, screw thread is installed with lock-screw 32, and lock-screw 32 coordinates with compasses arm 1 locking, institute
Rotary shaft 3 lower end stated rotatably is inserted on sucker 4, wide of compasses arm 1 with the axial direction one of rotary shaft 3
Causing, described lock-screw 32 is arranged along the width of described compasses arm 1, and lock-screw 32 screw thread spinning is on the top of sliding sleeve 31
Portion, the locking end of lock-screw 32 is locked with the upper surface of compasses arm 1 and is coordinated.Lock-screw is arranged on sliding sleeve top, then locks
Tight screw is movable along the width of compasses, locks the upper surface (leptoprosopy) of compasses arm, effectively avoids compasses scale,
Avoid the lock-screw infringement to scale, and compasses arm is bigger along the intensity on width, avoid locking excessive completely
The compasses arm bending hidden danger caused.
The rotary-top of described sliding sleeve 31 is dynamic is combined with nut 33, is provided with installing hole, nut 33 at the top of sliding sleeve 31
End is provided with annular stop flange 331, and annular stop flange 331 is rotatable in embedding installing hole, is fixed with at installing hole port
The spacing ring 34 being limited in installing hole by annular stop flange 331, spacing ring 34 is spacing with defining flange 331 to be coordinated, nut
33 parts exceed the top of sliding sleeve and form operating portion 332, nut easy installation and reliable, and the top of sliding sleeve 31 is provided with and nut 33
The coaxial through hole of screwed hole, described lock-screw 32 screw thread spinning is in nut 33, and the locking end of lock-screw 32 stretches into institute
State in through hole.Operating portion 332 circumferential side wall of described nut 33 is provided with anti-slip veins (not shown).When operation, can
Rotating nut, under the driving of screw thread, lock-screw realizes moving axially, thus realizes locking and conciliate latching operation, and structure is more
Compact, operate 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 guarantor
Protecting effect, and can play elastic locking, 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, scale eye split 311 and the axial centerline pair of rotary shaft 3
Should.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 more
For accurately, improve 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 and adjusts
Chalk 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 simple to carries, 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
This compasses functional.
Claims (6)
1. a College Mathematics Teaching compass teaching aid, includes with graduated, the compasses arm of flat, on the wide face of compasses arm
With scale, compasses arm one end is provided with center of circle leg assembly, and compasses arm is provided with chute, equipped with mobile pen clip on chute, described
Center of circle leg assembly includes rotary shaft and sucker, and rotary shaft upper end is fixed with sliding sleeve, and described sliding sleeve is slidably
Being sleeved on compasses arm, on described sliding sleeve, screw thread is installed with lock-screw, and lock-screw coordinates with the locking of compasses arm, described rotation
Rotating shaft lower end is rotatably inserted on sucker, and the wide face of compasses arm is consistent with the axial direction of rotary shaft, its feature
Being: described lock-screw is arranged along the width of described compasses arm, lock-screw screw thread spinning, at the top of sliding sleeve, is locked
The locking end of tight screw is locked with the upper surface of compasses arm and is coordinated, and the rotary-top of described sliding sleeve is dynamic is combined with nut, nut
Part exceeds the top of sliding sleeve and forms operating portion, and the top of sliding sleeve is provided with the through hole coaxial with the screwed hole of nut, described locking
Screw thread spinning is in nut, and the locking end of lock-screw stretches in described through hole, is provided with installing hole, spiral shell at the top of sliding sleeve
Female end portion is provided with annular stop flange, and annular stop flange is rotatable in embedding installing hole, is fixed with ring at installing hole port
Shape defining flange is limited in the spacing ring in installing hole, and spacing ring is spacing with defining flange to be coordinated.
College Mathematics Teaching compass teaching aid the most according to claim 1, it is characterised in that: the operating portion circumference of described nut
Sidewall is provided with anti-slip veins.
College Mathematics Teaching compass teaching aid the most according to claim 1 or claim 2, it is characterised in that: the lock of described lock-screw
Tight end end is provided with flexible rubber pad.
College Mathematics Teaching compass teaching aid the most according to claim 1 or claim 2, it is characterised in that: the lateral sidewalls of described sliding sleeve
It is provided with the axial centerline pair of the scale eye split extended along compasses arm width, scale eye split and rotary shaft
Should.
College Mathematics Teaching compass teaching aid the most according to claim 1 or claim 2, it is characterised in that: described rotary shaft is positioned at suction
One end in dish is set with spring and connection has back of the body cap.
College Mathematics Teaching compass teaching aid the most according to claim 1 or claim 2, it is characterised in that: described compasses arm is adjustable
The telescopic arm of length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620240914.XU CN205818752U (en) | 2016-03-25 | 2016-03-25 | College Mathematics Teaching compass teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620240914.XU CN205818752U (en) | 2016-03-25 | 2016-03-25 | College Mathematics Teaching compass teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205818752U true CN205818752U (en) | 2016-12-21 |
Family
ID=58148827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620240914.XU Expired - Fee Related CN205818752U (en) | 2016-03-25 | 2016-03-25 | College Mathematics Teaching compass teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205818752U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108058514A (en) * | 2017-12-07 | 2018-05-22 | 曾董科 | A kind of multifunctional compass |
| CN108556533A (en) * | 2018-04-08 | 2018-09-21 | 袁静 | A kind of mathematical education instruments used for education |
| CN109203791A (en) * | 2018-11-20 | 2019-01-15 | 张文锴 | A kind of compasses for teaching |
| CN110816128A (en) * | 2019-11-20 | 2020-02-21 | 韩登利 | Special drawing device of higher mathematics |
-
2016
- 2016-03-25 CN CN201620240914.XU patent/CN205818752U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108058514A (en) * | 2017-12-07 | 2018-05-22 | 曾董科 | A kind of multifunctional compass |
| CN108556533A (en) * | 2018-04-08 | 2018-09-21 | 袁静 | A kind of mathematical education instruments used for education |
| CN109203791A (en) * | 2018-11-20 | 2019-01-15 | 张文锴 | A kind of compasses for teaching |
| CN109203791B (en) * | 2018-11-20 | 2024-01-09 | 张文锴 | Compass for teaching |
| 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 |
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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: 20161221 Termination date: 20180325 |