CN206930231U - A kind of dual-purpose protractor of teaching demonstration - Google Patents
A kind of dual-purpose protractor of teaching demonstration Download PDFInfo
- Publication number
- CN206930231U CN206930231U CN201720211940.4U CN201720211940U CN206930231U CN 206930231 U CN206930231 U CN 206930231U CN 201720211940 U CN201720211940 U CN 201720211940U CN 206930231 U CN206930231 U CN 206930231U
- Authority
- CN
- China
- Prior art keywords
- protractor
- line
- angle
- length scale
- angulation
- 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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- Length-Measuring Instruments Using Mechanical Means (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a kind of dual-purpose protractor of teaching demonstration, include the body of nontransparent material, it is characterised in that：The body include protractor body and with the integrally formed length scale chi body of protractor body, the length scale chi body is located at the straight flange having on the protractor body where 0 degree of graduation mark, and one group of through hole is provided with the length scale chi and on the circle centre position and its extended line of protractor zero graduation line.In the case of shorter on the side of tested angulation, the zero graduation line of protractor can be overlapped by a line of the pupil accurately with tested angulation, be tested the another a line of angulation and can be observed by the circular arc of hollow out, can be to read angle.Thus can be shorter at measured angle and in the case that protractor body is opaque, so as to smoothly read the number of degrees at angle, it is easy to teachers and students to operate, and be advantageous to improve the quality of teaching.
Description
Technical field
It the utility model is related to protractor field, more particularly to the dual-purpose protractor of teaching demonstration.
Background technology
At present, the protractor used in school mathematicses teaching process is mostly wood materials.Due to using transparent material
The cost of manufacture of protractor can be increased, and the damage of protractor is easily caused during teaching demonstration, therefore teaching demonstration dosage
Angle device is mostly wood materials.When two sides at the angle of measurement are too short, because wooden protractor is opaque, the zero graduation of protractor
Line accurately can not align with a line at angle, and then can not smoothly measure the accurate number of degrees of angle of departure.
Utility model content
The purpose of this utility model, exactly to solve the problems, such as that prior art is present, and devise a kind of teaching demonstration two
With protractor, make a line and the protractor zero graduation line accurate alignment for being tested angulation.Another a line is seen by the circular arc of hollow out
Observe, so as to smoothly read angle.
The technical solution of the utility model is：A kind of dual-purpose protractor of teaching demonstration, include the body of nontransparent material, institute
State body include protractor body and with the integrally formed length scale chi body of protractor body, the length scale chi body
There is the straight flange where 0 degree of graduation mark on the protractor body, on the length scale chi and in protractor zero graduation
One group of through hole is provided with the circle centre position and its extended line of line.Its advantageous effects is：The a line throughput of tested angulation
Through hole on the device zero graduation line of angle aligns with the zero graduation line of protractor, so as to accurately determine base in measurement angle
Standard, smoothly measure the number of degrees of angle of departure.Length scale chi below protractor, it is added in use and uses function.
The utility model has carried out further improvement to its technical scheme, and specific improvement is as follows：
There is the arc ring of hollow out in the middle part of the dual-purpose protractor body of teaching demonstration.Its advantageous effects is：The one of angle
Bar side is alignd with the zero graduation line of protractor, and another a line is observed by the circular arc of hollow out, so as to smoothly measure
The number of degrees at angle.
Graduation mark is set on the dual-purpose protractor body of teaching demonstration, the graduation mark is prolonged by the center of circle of semicircular protractor
At the maximum radius for reaching protractor body.Its advantageous effects is：The a line at angle is alignd with the zero graduation line of protractor,
The another a line at angle can align with the angle index line on protractor, and then smoothly read angle.
Connecting plate is provided between the hollow out arc ring of the protractor.Its advantageous effects is：Increase connecting plate, the amount of making
Angle device integrated connection is more stable.
The arc ring of hollow out in the middle part of the dual-purpose protractor body of teaching demonstration is semicircular ring.Its advantageous effects
For：In measurement angle, a line at angle can be made to be observed by the semicircular ring of hollow out, so as to smoothly measure angle.
The arc ring of hollow out in the middle part of the dual-purpose protractor body of teaching demonstration has two or more.It is beneficial to skill
Art effect is：, can be in different hollow out hollow out arc rings according to the difference of the length of side at angle, the side at the angle of observation, so as to survey
Measure the number of degrees at angle.
Through hole on the dual-purpose protractor body of teaching demonstration uniformly divides along the 0 degree of graduation mark and its extended line of angle
Cloth.Its advantageous effects：The one side at angle accurate zero quarter with protractor is enable by the through hole on protractor zero graduation line
Line alignment is spent, so as to measure its angle.
The utility model advantageous effects can be learnt by above-mentioned technical proposal：During using this protractor, it can both be used for
The number of degrees of measurement angle, length can also be measured with length scale chi, facilitate use of the teacher in teaching process.Measuring
During angle, a line at angle and the zero graduation line accurate alignment of protractor can be made, another a line is seen by the arc ring of hollow out
Observe, and then smoothly read the number of degrees at angle.Teacher's teaching is facilitated, also improves the efficiency of teaching.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：1st, angle index, 2, connecting plate, 3, the semicircular ring of hollow out, 4, the semicircular ring of hollow out, 5, on zero graduation line
Hole, 6, length scale line.
Embodiment
In order to more fully understand the utility model, embodiment of the present utility model is explained in detail below in conjunction with the accompanying drawings.
Specific embodiment：As shown in figure 1, the dual-purpose protractor of the teaching demonstration, its structure includes angle index 1, in angulation
Connecting plate is provided between the hollow out arc ring of device, the hollow out annulus 3 and 4 on protractor body, is provided between the annulus of hollow out
Connecting plate, there is uniform hole 5 on the zero graduation line of protractor, there is the graduation mark of measurement length in the bottom of protractor body
6。
When using the protractor measurement angle, a hole 5 become on the device of throughput angle for being tested angulation can be with angulation
The zero graduation line accurate alignment of device, another can be observed by the circular arc of hollow out, measured so as to smoothly read
The number of degrees at angle.Connecting plate is provided between the arc ring of hollow out, to increase the fastness of protractor body.Hollow out protractor body
Bottom is additionally provided with length scale line 6, with for measuring length.The double-purpose functional of protractor facilitates teacher's in teaching process
Use, also improve efficiency of teaching.
It is to be also not limited to the example above, this skill to limitation of the present utility model, the utility model that described above, which is not,
The variations, modifications, additions or substitutions that the those of ordinary skill in art field is made in essential scope of the present utility model, also should
Belong to the scope of protection of the utility model.
Claims (1)
1. a kind of dual-purpose protractor of teaching demonstration, include the body of nontransparent material, it is characterised in that：The body includes angulation
Device body and it is located at the protractor with the integrally formed length scale chi body of protractor body, the length scale chi body
There is the straight flange where 0 degree of graduation mark on body, on the length scale chi body and in the circle centre position of protractor zero graduation line
And its one group of through hole is provided with extended line；There is the arc ring of hollow out in the middle part of the protractor body；On the protractor body
Graduation mark is set, and the graduation mark is extended to the maximum radius of protractor body by the center of circle of semicircular protractor；The angulation
Connecting plate is provided between the hollow out arc ring of device；The arc ring is semicircular ring；The arc ring has two or more；Institute
Through hole is stated to be uniformly distributed along the 0 degree of graduation mark and its extended line of angle；There is uniform hole on the zero graduation line of protractor,
The bottom of protractor body has the graduation mark of measurement length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720211940.4U CN206930231U (en) | 2017-03-07 | 2017-03-07 | A kind of dual-purpose protractor of teaching demonstration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720211940.4U CN206930231U (en) | 2017-03-07 | 2017-03-07 | A kind of dual-purpose protractor of teaching demonstration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206930231U true CN206930231U (en) | 2018-01-26 |
Family
ID=61350363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720211940.4U Expired - Fee Related CN206930231U (en) | 2017-03-07 | 2017-03-07 | A kind of dual-purpose protractor of teaching demonstration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206930231U (en) |
-
2017
- 2017-03-07 CN CN201720211940.4U patent/CN206930231U/en not_active Expired - Fee Related
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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: 20180126 Termination date: 20200307 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |