CN203792969U - Multifunctional compass for teaching - Google Patents
Multifunctional compass for teaching Download PDFInfo
- Publication number
- CN203792969U CN203792969U CN201420150442.XU CN201420150442U CN203792969U CN 203792969 U CN203792969 U CN 203792969U CN 201420150442 U CN201420150442 U CN 201420150442U CN 203792969 U CN203792969 U CN 203792969U
- Authority
- CN
- China
- Prior art keywords
- dwang
- fixed pole
- positioning rule
- radius
- radius positioning
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- 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)
Abstract
The utility model discloses a multifunctional compass for teaching. The multifunctional compass comprises a fixed rod, a rotating rod and a radius positioning rule, the top end of the fixed rod is hinged to that of the rotating rod, each of the fixed rod and the rotating rod is of a sheet structure, the top ends of the fixed rod and the rotating rod are superposed together, a sucker is arranged at the tail end of the fixed rod, a chalk ferrule is arranged at the tail end of the rotating rod, a zero-scale end of the radius positioning rule and the fixed rod are superposed and hinged, an upper edge of the radius positioning rule is aligned at the fixed rod along the central point of the length direction, a zero-scale point of the radius positioning rule is aligned at the an outer lateral side of the fixed rod, a scale value displayed on the radius positioning rule is half of radius of a drawn circle, length scale lines are marked on the outer surface of the rotating rod, multiple marked angle lines are diverged from an intersected outer point when the fixed rod and the rotating rod form an angle of 90 degrees, and a positioning central line is arranged on the inner surface of the rotating rod along the length direction and passes the midpoint of width of the rotating rod.
Description
Technical field
The utility model relates to teaching aid, relates in particular to a kind of for teaching multifunctional compass.
Background technology
In teaching process, especially, in the science teaching such as mathematics, material resources, chemistry, more frequent for the use of drawing tool, conventional drawing tool has compasses, ruler, protractor etc.This just needs teacher before giving lessons, and prepares multiple drawing tool aided educations.At present, because some schools lacks of capital, do not reach the condition that is equipped with a set of teaching drawing tool for each teacher, making needs mutually to use between teacher, brings very large trouble.Meanwhile, in the time giving lessons, according to difference mapping requirement, need to change frequently drawing tool, waste hours of instruction, affect the efficiency of giving lessons.
Utility model content
The purpose of this utility model is to provide a kind of teaching multifunctional compass, not only can draw like a cork the circle of required radius, can also use under the condition of same drawing tool the angle of draw straight line, drawing the required number of degrees.
The technical solution adopted in the utility model is:
A kind of teaching multifunctional compass, comprises a fixed pole and a dwang, and the top of fixed pole and dwang is hinged, described fixed pole and dwang adopt laminated structure, the top of fixed pole and dwang overlaps together, and the end of fixed pole is provided with sucker, and the end of dwang is provided with chalk cutting ferrule; Also comprise radius positioning rule, 0 scale end of radius positioning rule and fixed pole laminate and are hinged, align with fixed pole central point along its length in the upper edge of radius positioning rule, 0 calibration points of radius positioning rule is alignd with the outer side edges of fixed pole, the half that the scale value showing in radius positioning rule is actual drawn radius of circle; The outer surface mark of described dwang has length graduation mark; In the time that fixed pole and dwang are 90 °, exhale the angle line of many marks from crossing exterior point; The inner surface of dwang is provided with location center line along its length, and location center line is crossed the mid point of the width of dwang.
On the inner side edge of fixed pole and the inner side edge of dwang, be equipped with along its length dovetail groove, and cooperation is provided with the pole of two ends with bathrocephaly.
Described radius positioning rule slabbing, radius positioning rule width is less than or equal to the width of fixed pole.
The number of degrees of described angle line representative from top to bottom angle reduce gradually.
The utility model, on the basis of original compasses, improves, and has additional radius positioning rule, draw as required the circle of specifying radius length, having additional angle line and length graduation mark, drawing angle and the length of appointment, simple in structure, easy to operate, raising efficiency of teaching.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is structural representation rearview of the present utility model;
Fig. 3 is angle line mark enlarged diagram of the present utility model;
Fig. 4 is dovetail groove enlarged diagram of the present utility model;
Fig. 5 is branching rod structure schematic diagram of the present utility model.
Detailed description of the invention
As shown in Figures 1 to 5, the utility model comprises a fixed pole 1 and a dwang 2, the top of fixed pole 1 and dwang 2 overlaps together and is hinged, fixed pole 1 and dwang 2 adopt laminated structure, save space, the end of fixed pole 1 is provided with plastic suction disc 3, and sucker 3 can well be fixed on the utility model on blackboard, and the end of dwang 2 is provided with chalk cutting ferrule 4, also comprise radius positioning rule 5, radius positioning rule 5 is for drawing the circle of specifying radius, 0 scale end of radius positioning rule 5 and fixed pole 1 laminate and are hinged, align with fixed pole 1 central point A along its length in the upper edge of radius positioning rule 5, 0 calibration points B of radius positioning rule 5 aligns with the outer side edges 16 of fixed pole 1, the half that the scale value showing in radius positioning rule 5 is actual drawn radius of circle, radius positioning rule 5 slabbings, radius positioning rule 5 width are less than or equal to the width of fixed pole 1, the inner surface 2-1 of dwang 2 is provided with location center line 15 along its length, location center line 15 is crossed the mid point of the width of dwang 2, the outer surface 2-2 mark of described dwang 2 has length graduation mark 12, and length graduation mark 12 is for drawing the straight line of designated length, in the time that fixed pole 1 and dwang 2 are 90 °, exhale the angle line 13 of many marks from crossing exterior point D, the number of degrees of angle line 13 representatives from top to bottom angle reduce gradually, and angle line 13 is specified big or small angle for drawing.On the inner side edge 109 of dwang 2 and the inner side edge of dwang 2, be equipped with along its length dovetail groove 8, and cooperation is provided with the pole 7 of two ends with bathrocephaly 14, pole 7 is the angle with dwang 2 for fixing fixed pole 1, in the time rotating, can not dwindle because of user's improper operation or expand and specify radius round.
Structure accompanying drawing illustrates using method of the present utility model below:
The utlity model has three functions, draw and specify the circle of radius, the straight line of drawing designated length and picture to specify the angle of angle.
Draw the circle of specifying radius: first break fixed pole 1 and dwang 2 into two with one's hands level and put on the table, radius positioning rule 5 is rotated, 0 calibration points of radius positioning rule 5 is alignd with the outer side edges 16 of fixed pole 1, when drawing the bowlder that radius is 8cm, dwang 2 is rotated, it is crossing that location center line 15 and the radius positioning rule 5 that the inner surface 2-1 of dwang 2 is arranged indicates 4 graduation mark, due to the scale value showing in radius positioning rule 5 half that is actual drawn radius of circle, according to triangle neutrality line theorem, leg-of-mutton neutrality line is parallel to the 3rd limit (not contacting with neutrality line), and equal the half on the 3rd limit.Determine after radius size, then pole 7 is stuck between fixed pole 1 and dwang 2, what make that fixed pole 1 and dwang 2 can not be random dwindles or expands, and preparation is complete.Again sucker 3 is adsorbed on blackboard, rotates a circle, can obtain the circle of required radius.The radius that the utility model provides is 0-28cm, can, according to self teaching condition, range size be suitably set.
Draw the straight line of designated length: utilize the outer surface 2-2 mark of dwang 2 to have length graduation mark 12, fixed pole 1 and dwang 2 merging are superimposed, can draw required straight line, the scope that the utility model provides is 0-15cm.
Draw the angle of specifying angle: first break fixed pole 1 and dwang 2 into two with one's hands level and put on the table, the number of degrees of angle line 13 representatives from top to bottom angle reduce gradually, and as shown in Figure 4, the angle number of degrees that provide have 75 °, 60 °, 45 °, 30 °, 15 °.In the time need to drawing the angle of 30 °, the inner side edge of dwang 2 10 is alignd with 30 ° of angle lines, more whole device is pressed to blackboard, can draw 30 ° of angles.
Fixed pole 1 of the present utility model, dwang 2 and radius positioning rule 5 can adopt rigid plastics or light wood to make, lightweight, be easy to carry, easy to operate.
Claims (4)
1. a teaching multifunctional compass, comprise a fixed pole and a dwang, the top of fixed pole and dwang is hinged, it is characterized in that: described fixed pole and dwang adopt laminated structure, the top of fixed pole and dwang overlaps together, the end of fixed pole is provided with sucker, and the end of dwang is provided with chalk cutting ferrule; Also comprise radius positioning rule, 0 scale end of radius positioning rule and fixed pole laminate and are hinged, align with fixed pole central point along its length in the upper edge of radius positioning rule, 0 calibration points of radius positioning rule is alignd with the outer side edges of fixed pole, the half that the scale value showing in radius positioning rule is actual drawn radius of circle; The outer surface mark of described dwang has length graduation mark; In the time that fixed pole and dwang are 90 °, exhale the angle line of many marks from crossing exterior point; The inner surface of dwang is provided with location center line along its length, and location center line is crossed the mid point of the width of dwang.
2. teaching multifunctional compass according to claim 1, is characterized in that: on the inner side edge of fixed pole and the inner side edge of dwang, be equipped with along its length dovetail groove, and cooperation is provided with the pole of two ends with bathrocephaly.
3. teaching multifunctional compass according to claim 2, is characterized in that: described radius positioning rule slabbing, radius positioning rule width is less than or equal to the width of fixed pole.
4. teaching multifunctional compass according to claim 3, is characterized in that: the number of degrees of described angle line representative from top to bottom angle reduce gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420150442.XU CN203792969U (en) | 2014-03-31 | 2014-03-31 | Multifunctional compass for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420150442.XU CN203792969U (en) | 2014-03-31 | 2014-03-31 | Multifunctional compass for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203792969U true CN203792969U (en) | 2014-08-27 |
Family
ID=51375226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420150442.XU Expired - Fee Related CN203792969U (en) | 2014-03-31 | 2014-03-31 | Multifunctional compass for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203792969U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109094259A (en) * | 2018-09-27 | 2018-12-28 | 台州学院 | A kind of auxiliary brush pen draws the tool of circle |
| CN111231548A (en) * | 2020-02-17 | 2020-06-05 | 张传水 | Teaching device |
-
2014
- 2014-03-31 CN CN201420150442.XU patent/CN203792969U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109094259A (en) * | 2018-09-27 | 2018-12-28 | 台州学院 | A kind of auxiliary brush pen draws the tool of circle |
| CN111231548A (en) * | 2020-02-17 | 2020-06-05 | 张传水 | Teaching device |
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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 |
Granted publication date: 20140827 Termination date: 20150331 |
|
| EXPY | Termination of patent right or utility model |