CN207274232U - A kind of compass for math teaching - Google Patents
A kind of compass for math teaching Download PDFInfo
- Publication number
- CN207274232U CN207274232U CN201720587257.0U CN201720587257U CN207274232U CN 207274232 U CN207274232 U CN 207274232U CN 201720587257 U CN201720587257 U CN 201720587257U CN 207274232 U CN207274232 U CN 207274232U
- Authority
- CN
- China
- Prior art keywords
- cross bar
- inner sleeve
- compass
- piston
- sucker
- 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 kind of compass for math teaching, including cross bar, cross bar right end is fixedly connected with sucker, and cross bar is arranged with vernier surface, and rail surface has engraved scale；Sucker is equipped with outer sleeve, and outer sleeve bottom fixes connection rubber disc, inner sleeve is plugged with outer sleeve, cross bar right end is fixedly connected with the top of inner sleeve；The utility model can use the right end of sucker fixed transverse rod, not use needle point, will not damage blackboard, and press cross bar.Inner sleeve bottom is moved, and the gas in rubber disc is extruded, and plays the role of negative pressure fixation, when releasing fixed, draw ring, piston upwards are pulled, venthole connects first through hole and the second through hole, introduces external air into rubber disc, rubber disc is no longer attached on blackboard；Moving cursor, can accurately adjust by scale, and radius can also accurately be measured by not depending on ruler.
Description
Technical field
It the utility model is related to teaching equipment field, and in particular to a kind of compass for math teaching.
Background technology
Compasses are a kind of common teaching aids, fixed using one end, and the other end surrounds the rotating method of fixing point
Circle is drawn, traditional compasses use needle point as fixing end, but are easy to cause blackboard in blackboard upper drawing circle using needle point in teaching
Damage；Traditional compasses need to measure out the distance between compasses bipod with a yardstick, can not in the case of no ruler as radius
It is accurate to draw circle.
The content of the invention
The purpose of the utility model is to overcome the above-mentioned problems in the prior art, there is provided a kind of mathematical education circle
Rule, do not use needle point, will not damage blackboard, radius can also accurately be measured by not depending on ruler.
To realize above-mentioned technical purpose and the technique effect, the utility model is to be achieved through the following technical solutions：
A kind of compass for math teaching, including cross bar, the cross bar right end are fixedly connected with sucker, and the cross bar is arranged with
Vernier surface, the rail surface have engraved scale；
The sucker is equipped with outer sleeve, and the outer sleeve bottom is fixed connection rubber disc, is plugged with the outer sleeve interior
Sleeve, the inner sleeve top are fixedly connected with cross bar right end, the piston freely up and down slided, the work are equipped with the inner sleeve
Plug is equipped with the L-shaped venthole of connection bottom and top side wall, and the position that the inner sleeve bottom corresponds to venthole bottom offers
First through hole, the inner sleeve top side wall offer the second through hole corresponding with venthole, and the piston is moved to inner sleeve
During top, venthole is connected with the second through hole, and the top land, which abuts, the first spring, first spring and inner sleeve top
Portion abuts, and the top land is connected with hawser, and draw ring is connected to after the perforation that the hawser is opened up through inner sleeve top；
The vernier is equipped with the lantern ring for being set in rail surface, and the collar footprint is fixed with C-shaped card slot.
Further, the scale is engraved in cross bar side.
Further, the guide wheel that hawser guidance passes through is fixed with the perforation.
Further, card slot bottom both ends are connected with catch, are connected in the middle part of the catch by second spring
To card slot inner wall.
Further, it is arranged with rubber layer at the top of the catch.
The income effect of the utility model is：
1st, using the right end of sucker fixed transverse rod, needle point is not used, blackboard will not be damaged, and press cross bar.Inner sleeve
Bottom is moved, and the gas in rubber disc is extruded, and plays the role of negative pressure fixation, when releasing fixed, pulls draw ring, piston is upward
Movement, venthole connection first through hole and the second through hole, introduce external air into rubber disc, rubber disc is no longer attached to blackboard
On.
2nd, moving cursor, can accurately adjust by scale, and radius can also accurately be measured by not depending on ruler.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the utility model embodiment, make required for being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the utility model,
For those of ordinary skill in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the structure diagram of compasses described in the utility model；
Fig. 2 is the structure diagram of sucker described in the utility model；
Fig. 3 is profile, i.e., the structure diagram of vernier described in the utility model at A-A in Fig. 1；
In attached drawing, parts list represented by the reference numerals is as follows：
100- cross bars；
200- suckers, 201- outer sleeves, 202- rubber discs, 203- inner sleeves, 204- pistons, 205- ventholes, 206-
One through hole, the second through holes of 207-, the first springs of 208-, 209- hawsers, 210- perforation, 211- draw rings, 212- guide wheels；
300- verniers, the 301- lantern rings, 302- card slots, 303- catch, 304- second springs, 305- rubber layers；
400- scales.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without creative efforts
The all other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figs. 1-3, the utility model is a kind of compass for math teaching, including cross bar 100,100 right end of cross bar are consolidated
Surely sucker 200 is connected with, cross bar 100 is arranged with 300 surface of vernier, and scale 400 has been engraved on 100 surface of cross bar；
Sucker 200 is equipped with outer sleeve 201, and 201 bottom of outer sleeve is fixed connection rubber disc 202, is plugged with outer sleeve 201
Inner sleeve 203, the top of inner sleeve 203 are fixedly connected with 100 right end of cross bar, the piston freely up and down slided are equipped with inner sleeve 203
204, piston 204 is equipped with the L-shaped venthole 205 of connection bottom and top side wall, and 203 bottom of inner sleeve corresponds to 205 bottom of venthole
The position in portion offers first through hole 206, and 203 top side wall of inner sleeve offers second through hole corresponding with venthole 205
207, when piston 204 is moved to 203 top of inner sleeve, venthole 203 is connected with the second through hole 207, and the top of piston 204, which abuts, to be had
First spring 208, the first spring 208 are abutted with the top of inner sleeve 203, and the top of piston 204 is connected with hawser 209, and hawser 209 is worn
Cross the perforation 210 that the top of inner sleeve 203 opens up and be connected to draw ring 211 afterwards；
Vernier 300 is equipped with the lantern ring 301 for being set in 100 surface of cross bar, and 301 bottom of the lantern ring is fixed with C-shaped card slot 302.
Wherein, scale 400 is engraved in 100 side of cross bar.
Wherein, it is fixed with the guide wheel 212 that hawser guidance 209 passes through in perforation 210.
Wherein, 302 bottom both ends of card slot are connected with catch 303, and the middle part of catch 303 is connected by second spring 304
To 302 inner wall of card slot.
Wherein, the top of catch 303 is arranged with rubber layer 305.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Live feature with reference to specific features, structure, the material that the embodiment or example describe and be contained at least one of the utility model
In embodiment or example.In the present specification, schematic expression of the above terms be not necessarily referring to identical embodiment or
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiments or example
In combine in an appropriate manner.
The preferred embodiment in the utility model disclosed above is only intended to help and illustrates the utility model.Preferred embodiment is simultaneously
There is no the details that detailed descriptionthe is all, it is only the embodiment also not limit the utility model.Obviously, according to this theory
The content of bright book, can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is in order to preferably
The principle and practical application of the utility model is explained, so that skilled artisan can be best understood by and utilize this
Utility model.The utility model is limited only by the claims and their full scope and equivalents.
Claims (5)
- A kind of 1. compass for math teaching, it is characterised in that：Including cross bar（100）, the cross bar（100）Right end is fixedly connected with Sucker（200）, the cross bar（100）It is arranged with vernier（300）Surface, the cross bar（100）Scale is engraved in surface（400）； The sucker（200）Equipped with outer sleeve（201）, the outer sleeve（201）Connection rubber disc is fixed in bottom（202）, the overcoat Cylinder（201）Inside it is plugged with inner sleeve（203）, the inner sleeve（203）Top is fixedly connected with cross bar（100）Right end, the inner sleeve Cylinder（203）It is interior equipped with the piston freely up and down slided（204）, the piston（204）L-shaped equipped with connection bottom and top side wall Venthole（205）, the inner sleeve（203）Bottom corresponds to venthole（205）The position of bottom offers first through hole（206）, The inner sleeve（203）Top side wall offers and venthole（205）Corresponding second through hole（207）, the piston（204）Move Move to inner sleeve（203）During top, venthole（205）With the second through hole（207）Connection, the piston（204）Top, which abuts, to be had First spring（208）, first spring（208）With inner sleeve（203）Top abuts, the piston（204）Top is connected with Hawser（209）, the hawser（209）Through inner sleeve（203）The perforation that top opens up（210）Draw ring is connected to afterwards（211）； The vernier（300）Equipped with being set in cross bar（100）The lantern ring on surface（301）, the lantern ring（301）Bottom is fixed with C-shaped card Groove（302）.
- A kind of 2. compass for math teaching according to claim 1, it is characterised in that：The scale（400）Engrave in horizontal stroke Bar（100）Side.
- A kind of 3. compass for math teaching according to claim 1, it is characterised in that：The perforation（210）Inside it is fixed with Hawser guidance（209）The guide wheel passed through（212）.
- A kind of 4. compass for math teaching according to claim 1, it is characterised in that：The card slot（302）Bottom both ends It is connected with catch（303）, the catch（303）Middle part passes through second spring（304）It is connected to card slot（302）Inner wall.
- A kind of 5. compass for math teaching according to claim 4, it is characterised in that：The catch（303）Top is arranged There is rubber layer（305）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720587257.0U CN207274232U (en) | 2017-05-25 | 2017-05-25 | A kind of compass for math teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720587257.0U CN207274232U (en) | 2017-05-25 | 2017-05-25 | A kind of compass for math teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207274232U true CN207274232U (en) | 2018-04-27 |
Family
ID=61992431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720587257.0U Expired - Fee Related CN207274232U (en) | 2017-05-25 | 2017-05-25 | A kind of compass for math teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207274232U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130623A (en) * | 2018-08-14 | 2019-01-04 | 安徽信息工程学院 | Compasses suitable for blackboard |
| CN109130626A (en) * | 2018-10-26 | 2019-01-04 | 刘小亮 | A kind of teaching compass ruler |
| CN109605992A (en) * | 2018-12-06 | 2019-04-12 | 陕西理工大学 | A kind of damping fixture block location type drawing composite ruler |
| CN114228373A (en) * | 2021-12-23 | 2022-03-25 | 陈燕 | Auxiliary circle drawing device and method with adaptively protruded chalk heads for teaching |
| CN114407558A (en) * | 2022-03-07 | 2022-04-29 | 浙江国际海运职业技术学院 | Drawing tool for mathematical education |
-
2017
- 2017-05-25 CN CN201720587257.0U patent/CN207274232U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130623A (en) * | 2018-08-14 | 2019-01-04 | 安徽信息工程学院 | Compasses suitable for blackboard |
| CN109130626A (en) * | 2018-10-26 | 2019-01-04 | 刘小亮 | A kind of teaching compass ruler |
| CN109605992A (en) * | 2018-12-06 | 2019-04-12 | 陕西理工大学 | A kind of damping fixture block location type drawing composite ruler |
| CN114228373A (en) * | 2021-12-23 | 2022-03-25 | 陈燕 | Auxiliary circle drawing device and method with adaptively protruded chalk heads for teaching |
| CN114228373B (en) * | 2021-12-23 | 2022-10-11 | 陈燕 | Teaching chalk head adaptability convex auxiliary circle drawing device and method |
| CN114407558A (en) * | 2022-03-07 | 2022-04-29 | 浙江国际海运职业技术学院 | Drawing tool for mathematical education |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180427 Termination date: 20190525 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |