CN201922765U - Rectilinear ruler for math teaching - Google Patents
Rectilinear ruler for math teaching Download PDFInfo
- Publication number
- CN201922765U CN201922765U CN2011200629373U CN201120062937U CN201922765U CN 201922765 U CN201922765 U CN 201922765U CN 2011200629373 U CN2011200629373 U CN 2011200629373U CN 201120062937 U CN201120062937 U CN 201120062937U CN 201922765 U CN201922765 U CN 201922765U
- Authority
- CN
- China
- Prior art keywords
- ruler
- pen cap
- straight plate
- rail groove
- track groove
- 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 rectilinear ruler for math teaching, comprising a straight plate; the straight plate is provided with length scales; a positioning rod is installed at position of the zero-scale; one end of the positioning rod is tapered; the positioning rod is provided with an angle dial plate; the straight plate is further provided with a track groove, and the track groove is parallel to the scale surface of the straight plate; the two side walls of the track groove are respectively provided with sliding grooves; the rectilinear ruler further comprises a pen cap rod; the diameter of the pen cap rod is less than the width of the track groove; the pen cap rod is provided with a sliding ring, and the sliding ring is positioned in the sliding groove; the diameter of the sliding ring is greater than that of the track groove and is less than the maximum distance between the sliding grooves in two side walls of the track groove; and the middle of the pen cap rod is provided with a pen placing through cavity. The rectilinear ruler has the advantages that the defects of the prior art can be solved; the functions of rectilinear ruler, compasses and triangle plate are combined; the rectilinear ruler can be used for drawing straight lines, circles and pre-set angles; a length fixing device is arranged, so an arc with pre-set radius can be drawn; and the ruler has a reasonable structure, is convenient to use and is suitable for teaching.
Description
Technical field
The utility model relates to mathematical education apparatus field, specifically is a kind of mathematical education ruler that can draw the different radii circular arc.
Background technology
At present, in the mathematical education field, when the mathematics teacher on blackboard during graphing; usually can use ruler, compasses, set square etc., wherein utilize ruler to draw straight line, it is circular to utilize compasses to draw; utilize set square to draw the line of certain angle, and the three can't substitute mutually.This will teacher of the seeking advice in teaching, must carry many cover teaching aids, carry inconvenience.Simultaneously, existing compasses for teaching can't sizing be drawn circle, must be earlier draws behind the length straight line of required radius of circle with ruler, chooses radius with compasses according to this straightway again and carries out that picture is round to be operated, and is very loaded down with trivial details, wasted instructional blocks of time.
The utility model content
The purpose of this utility model is to provide a kind of mathematical education ruler, it is integrated in one with ruler function, compasses function, set square, can realize straight line, circle and decide the drafting of angle angle, and the circular arc of the designated length radius that can directly draw, easy to use, be easy to mathematical education and use.
The utility model for achieving the above object, be achieved through the following technical solutions: a kind of mathematical education ruler, comprise straight plate, straight plate is provided with the length scale, backstay is installed at " 0 " scale place, backstay one end is a cone tip shape, and setting angle dial on the backstay is offered rail groove on straight plate, rail groove is parallel with the scale face of straight plate, chute is set respectively on the two side of rail groove, also comprises pen cap bar, the diameter of pen cap bar is less than the width of rail groove, on the pen cap bar slip ring is installed, slip ring is positioned at chute, and the diameter of slip ring is provided with in the middle of the pen cap bar and puts a cavity greater than the diameter of rail groove and less than the ultimate range between the chute of rail groove two side.
Described putting on the cavity madial wall is provided with the sponge chuck.
Advantage of the present utility model is: can solve the deficiency that exists in the known technology; Ruler function, compasses function, set square are integrated in one, can realize straight line, circle and decide the drafting of angle angle; Be provided with length control device, the circular arc of the designated length radius that can directly draw; Rational in infrastructure, easy to use, be easy to teaching and use; Low cost of manufacture is easy to carry about with one etc.
Description of drawings
Accompanying drawing 1 is a main TV structure schematic diagram of the present utility model;
Accompanying drawing 2 be in the accompanying drawing 1 A to local structure for amplifying schematic diagram.
Label shown in the accompanying drawing: 1, backstay; 2, length scale; 3, straight plate; 4, rail groove; 5, put a cavity; 6, pen cap bar; 7, angle dial; 8, chute; 9, slip ring.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
A kind of mathematical education ruler described in the utility model, agent structure comprises straight plate 3, and described straight plate 3 is used ruler for teaching, and its length overall is at 50cm-60cm.Straight plate 3 preferred employing highstrenghtpistons make.Straight plate 3 is provided with length scale 2.At " 0 " scale place backstay 1 is installed, backstay 1 one ends are cone tip shape, and backstay 1 can use as location, the center of circle, backstay 1 general bolt, screw or the tapered rod of adopting, preferred tapered rod.Setting angle dial 7 on the backstay 1, angle dial 7 keeps motionless with backstay 1, can measure the anglec of rotation of straight plate 3, thereby draws two lines or the circular arc of different angles.On straight plate 3, offer rail groove 4, rail groove 4 is parallel with the scale face of straight plate 3, chute 8 is set respectively on the two side of rail groove 4, also comprise pen cap bar 6, the diameter of pen cap bar 6 is less than the width of rail groove 4, slip ring 9 is installed on the pen cap bar 6, slip ring 9 is positioned at chute 8, the diameter of slip ring 9 is greater than the diameter of rail groove 4 and less than the ultimate range of 8 of two side chutes, pen cap bar 6 utilizes slip ring 9 to be installed on rail groove 4, and can in rail groove 4, move easily, be provided with in the middle of the described pen cap bar 6 and put a cavity 5, put to place in the cavity 5 and draw with pen.
In the utility model, draw with pen in order to clamp, preferably the sponge chuck is set described putting on a cavity 5 madial walls.
When the utility model is drawn the measured length radius arc at needs, adjust and put a cavity 5 positions, making draws arrives predetermined graduated with pen, pins backstay 1 then, rotates straight plate 3 and can draw out the circular arc of deciding radius.
Claims (2)
1. mathematical education ruler, it is characterized in that: comprise straight plate (3), straight plate (3) is provided with length scale (2), backstay (1) is installed at " 0 " scale place, backstay (1) one end is a cone tip shape, backstay (1) is gone up setting angle dial (7), on straight plate (3), offer rail groove (4), rail groove (4) is parallel with the scale face of straight plate (3), chute (8) is set respectively on the two side of rail groove (4), also comprise pen cap bar (6), the diameter of pen cap bar (6) is less than the width of rail groove (4), and pen cap bar (6) is gone up slip ring (9) is installed, and slip ring (9) is positioned at chute (8), the diameter of slip ring (9) is provided with in the middle of the pen cap bar (6) and puts a cavity (5) greater than the diameter of rail groove (4) and less than the ultimate range between rail groove (4) two side chute (8).
2. a kind of mathematical education ruler according to claim 1 is characterized in that: described putting on a cavity (5) madial wall is provided with the sponge chuck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200629373U CN201922765U (en) | 2011-03-11 | 2011-03-11 | Rectilinear ruler for math teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200629373U CN201922765U (en) | 2011-03-11 | 2011-03-11 | Rectilinear ruler for math teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201922765U true CN201922765U (en) | 2011-08-10 |
Family
ID=44426633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200629373U Expired - Fee Related CN201922765U (en) | 2011-03-11 | 2011-03-11 | Rectilinear ruler for math teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201922765U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105882250A (en) * | 2014-11-18 | 2016-08-24 | 陆平 | Compasses |
| CN112432574A (en) * | 2020-11-30 | 2021-03-02 | 中冶宝钢技术服务有限公司 | Bolt positioner with adjustable |
-
2011
- 2011-03-11 CN CN2011200629373U patent/CN201922765U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105882250A (en) * | 2014-11-18 | 2016-08-24 | 陆平 | Compasses |
| CN112432574A (en) * | 2020-11-30 | 2021-03-02 | 中冶宝钢技术服务有限公司 | Bolt positioner with adjustable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20120311 |