CN203666190U - Telescopic concentric circle plotting instrument for mathematics teaching - Google Patents
Telescopic concentric circle plotting instrument for mathematics teaching Download PDFInfo
- Publication number
- CN203666190U CN203666190U CN201420017156.6U CN201420017156U CN203666190U CN 203666190 U CN203666190 U CN 203666190U CN 201420017156 U CN201420017156 U CN 201420017156U CN 203666190 U CN203666190 U CN 203666190U
- Authority
- CN
- China
- Prior art keywords
- armed lever
- sliding sleeve
- arm rod
- graduation mark
- sleeve
- 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
Links
Images
Landscapes
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model belongs to the technical field of mathematics teaching tools, and particularly relates to a telescopic concentric circle plotting instrument for mathematics teaching. The instrument comprises a hollow first arm rod of a tubular shape, a sliding sleeve, a second arm rod with a square cross section, a screw and a positioning rod, wherein a pair of opposite walls is provided with sewing openings, the side portion of one sewing opening is provided with first arm rod scale lines, and the position, close to the outer end, of the bottom side face is provided with a first arm rod chalk sleeve, the sliding sleeve is arranged on the first arm rod in a sleeved mode and can slide along the first arm rod, the portions, corresponding the sewing openings, of the side walls are provided with vision windows, the inner end of the second arm rod is inserted into the first arm rod, the side, close to the vision windows, of the second arm rod is provided with second arm rod scale lines, the position, close to the outer end, of the bottom side face is provided with a second arm rod chalk sleeve, the top side face of the sliding sleeve is provided with the screw, the positioning rod is fixedly connected with the bottom side face of the sliding sleeve. The telescopic concentric circle plotting instrument can solve the problem that a straight ruler and compasses need to be exchanged back and forth when an existing ruler is used for drawing a concentric circle, and meanwhile the problem that circle centers are not aligned when a second circle is drawn through the existing ruler.
Description
Technical field
The utility model belongs to teaching apparatus for mathematics technical field, relates in particular to telescopic concentric circles drawing instrument for a kind of mathematical education.
Background technology
When math teacher is drawn concentric circles on blackboard, what adopt is construction with ruler and compasses, first with good first radius of a circle of ruler amount, then draw first circle with compasses, again with second radius of a circle of ruler amount, draw second circle with compasses, this operating process need back and forth use ruler and compasses instead, can not once directly draw required concentric circles, and there will be the center of circle to not positive problem at second bowlder of picture.
Utility model content
The technical problems to be solved in the utility model is: telescopic concentric circles drawing instrument for a kind of mathematical education is provided, can once directly draws required concentric circles and can avoid second bowlder of picture to there will be the center of circle to not positive problem.
The utility model is achieved in that telescopic concentric circles drawing instrument for a kind of mathematical education, and described mathematical education comprises with telescopic concentric circles drawing instrument:
Be the first armed lever of hollow square tube type, on a pair of relative sidewall of described the first armed lever, be respectively equipped with the sealing extending along the length direction of described the first armed lever, the sidepiece of a described sealing is provided with the first armed lever graduation mark, the zero graduation line of described the first armed lever graduation mark arranges near the outer end of described the first armed lever, position near its outer end on the bottom side of described the first armed lever is provided with the first armed lever chalk sleeve, and described the first armed lever chalk sleeve aligns with the zero graduation line of described the first armed lever;
Be set in the sliding sleeve on described the first armed lever, described sliding sleeve can slide along described the first armed lever, and on the sidewall of described sliding sleeve, corresponding described sealing place is provided with the form for calibrating;
The second armed lever that cross section is square, insert in described the first armed lever slidably the inner of described the second armed lever, the outer end dissociative of described the second armed lever, described the second armed lever is provided with the second armed lever graduation mark near a side of described form, the zero graduation line of described the second armed lever graduation mark arranges near the outer end of described the second armed lever, position near its outer end on the bottom side of described the second armed lever is provided with the second armed lever chalk sleeve, and described the second armed lever chalk sleeve aligns with the zero graduation line of described the second armed lever;
In the top side face of described sliding sleeve, be provided with screw, one end of described screw is passed the sidewall of described sliding sleeve and is relied in the top side face of described the first armed lever, for compressing described the second armed lever inserting in described the first armed lever;
With the backstay that the bottom side of described sliding sleeve is fixedly connected with, the bearing of trend of described backstay and described the first armed lever chalk sleeve, the second armed lever chalk sleeve are consistent.
Improve as one, on the opposite side relative with a side that is provided with described the first armed lever graduation mark, be also provided with the first armed lever graduation mark; On the opposite side relative with a side that is provided with described the second armed lever graduation mark, be also provided with the second armed lever graduation mark; Be provided with on the relative opposite side of a side of described form and be also provided with form with described sliding sleeve.
As further improvement, the bottom of described backstay is provided with sucker, and the bottom of described sucker and described backstay is rotationally connected.
Owing to having adopted technique scheme, use the utility model provide the telescopic concentric circles drawing instrument of mathematical education time, first regulate the position of sliding sleeve, because backstay is fixedly connected with sliding sleeve, in moving sliding sleeve position, also drive the position that has changed backstay, make the distance between backstay and the first armed lever chalk sleeve equal first radius of a circle, pull outward again or push away inward the second armed lever, make the distance between the second armed lever chalk sleeve and backstay equal second radius of a circle, can check the second armed lever graduation mark through the form on sliding sleeve and the sealing on the first armed lever, then tighten screw, this just can once make required concentric circles, when solving existing ruler and making concentric circles, need use back and forth the problem of ruler and compasses instead, can solve second the bowlder center of circle of picture occurring when existing ruler is made concentric circles to not positive problem simultaneously, when finishing figure and not using this concentric circles drawing instrument, unclamp screw, the second armed lever is inserted in the first armed lever, and then tighten screw, reduced like this concentric circles drawing instrument length and volume, facilitate teacher to carry.
Brief description of the drawings
Fig. 1 is the perspective view of mathematical education of the present utility model with telescopic concentric circles drawing instrument;
Fig. 2 be along A in Fig. 1 to zoomed-in view;
Wherein, 10, the first armed lever, 101, sealing, 102, zero graduation line, 11, the second armed lever, 111, zero graduation line, 12, sliding sleeve, 121, form, 13, screw, 14, backstay, 15a, the first armed lever chalk sleeve, 15b, the second armed lever chalk sleeve, 16, sucker.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
By Fig. 1, Fig. 2 is known, this mathematical education comprises with telescopic concentric circles drawing instrument: the first armed lever 10 that is hollow square tube type, on a pair of relative sidewall of this first armed lever 10, be respectively equipped with the sealing 101 extending along the length direction of the first armed lever 10, the sidepiece of a sealing 101 is provided with the first armed lever graduation mark, the zero graduation line 102 of the first armed lever graduation mark arranges near the outer end of the first armed lever 10, position near its outer end on the bottom side of this first armed lever 10 is provided with the first armed lever chalk sleeve 15a, this the first armed lever chalk sleeve 15a aligns with the zero graduation line 102 of the first armed lever graduation mark, be set in the sliding sleeve 12 on the first armed lever 10, this sliding sleeve 12 can slide along the first armed lever 10, and on its sidewall, corresponding sealing 101 places are provided with the form 121 for calibrating, the second armed lever 11 that cross section is square, the inner of this second armed lever 11 is slidably inserted in the first armed lever 10, the outer end dissociative of this second armed lever 11, this second armed lever 11 is provided with the second armed lever graduation mark near a side of form 121, the zero graduation line 111 of this second armed lever graduation mark arranges near the outer end of the second armed lever 11, position near its outer end on the bottom side of this second armed lever 11 is provided with the second armed lever chalk sleeve 15b, and this second armed lever chalk sleeve 15b aligns with the zero graduation line 111 of the second armed lever graduation mark, in the top side face of sliding sleeve 12, be provided with screw 13, one end of this screw 13 is passed the sidewall of sliding sleeve 12 and is relied in the top side face of the first armed lever 10, for compressing the second armed lever 11 inserting in the first armed lever 10, the backstay 14 being fixedly connected with the bottom side of sliding sleeve 12, the bearing of trend of this backstay 14 is consistent with the first armed lever chalk sleeve 15a, the second armed lever chalk sleeve 15b, in the present embodiment, the bottom of backstay 14 is provided with sucker 16, and this sucker 16 is rotationally connected with the bottom of backstay 14.
When use, because backstay 14 is fixedly connected with sliding sleeve 12, in moving sliding sleeve 12 positions, also drive the position that has changed backstay 14, first regulate the position of sliding sleeve 12, make the distance between backstay 14 and the first armed lever chalk sleeve 15a equal first radius of a circle, pull outward again or push away inward the second armed lever 11, make the distance between the second armed lever chalk sleeve 15b and backstay 14 equal second radius of a circle, can check the second armed lever graduation mark through the form 121 on sliding sleeve 12 and the sealing 101 on the first armed lever 10, then tighten screw 13, this just can once make required concentric circles, when solving existing ruler and making concentric circles, need use back and forth the problem of ruler and compasses instead, can solve second the bowlder center of circle of picture occurring when existing ruler is made concentric circles to not positive problem simultaneously, when finishing figure and not using this concentric circles drawing instrument, unclamp screw 13, the second armed lever 11 is inserted in the first armed lever 10, and then tighten screw 13, reduced like this concentric circles drawing instrument length and volume, facilitate teacher to carry.
On the opposite side relative with a side that is provided with the first armed lever graduation mark, be also provided with graduation mark; On the opposite side relative with a side that is provided with the second armed lever graduation mark, be also provided with graduation mark; Be provided with on the relative opposite side of a side of form 121 and be also provided with form 121 with sliding sleeve 12.All like this can check the scale the first armed lever 10, the second armed lever 11 from the form 121 of sliding sleeve 12 both sides, very convenient and time saving and energy saving, can improve classroom efficiency.
The mathematical education that the utility model provides comprises with telescopic concentric circles drawing instrument: the first armed lever that is hollow square tube type, on a pair of relative sidewall of this first armed lever, be respectively equipped with the sealing extending along the length direction of the first armed lever, the sidepiece of a sealing is provided with the first armed lever graduation mark, the zero graduation line of the first armed lever graduation mark arranges near the outer end of the first armed lever, position near its outer end on the bottom side of this first armed lever is provided with the first armed lever chalk sleeve, and this chalk sleeve aligns with the zero graduation line of the first armed lever graduation mark; Be set in the sliding sleeve on the first armed lever, this sliding sleeve can slide along the first armed lever, and on its sidewall, corresponding sealing place is provided with the form for calibrating; The second armed lever that cross section is square, the inside and outside end dissociative of the first armed lever is inserted in the inner of this second armed lever, this second armed lever is provided with the second armed lever graduation mark near a side of form, its zero graduation line arranges near the outer end of the second armed lever, position near its outer end on the bottom side of this second armed lever is provided with the second armed lever chalk sleeve, and this second armed lever chalk sleeve aligns with the zero graduation line of the second armed lever; In the top side face of sliding sleeve, be provided with screw, one end of this screw is passed the sidewall of sliding sleeve and is leaned in the top side face of the first armed lever, for compressing the second armed lever inserting in the first armed lever; With the backstay that the bottom side of sliding sleeve is fixedly connected with, the bearing of trend of this backstay and the first armed lever chalk sleeve, the second armed lever chalk sleeve are consistent; When use, first regulate the position of sliding sleeve, make the distance between backstay and the first armed lever chalk sleeve equal first radius of a circle, pull outward again or push away inward the second armed lever, make the distance between the second armed lever chalk sleeve and backstay equal second radius of a circle, then tighten screw, this just can once make required concentric circles, when solving existing ruler and making concentric circles, need use back and forth the problem of ruler and compasses instead, can solve second the bowlder center of circle of picture occurring when existing ruler is made concentric circles to not positive problem simultaneously; When finishing figure and not using this concentric circles drawing instrument, unclamp screw, the second armed lever is inserted in the first armed lever, and then tighten screw, reduced like this concentric circles drawing instrument length and volume, facilitate teacher to carry.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. a telescopic concentric circles drawing instrument for mathematical education, is characterized in that, described mathematical education comprises with telescopic concentric circles drawing instrument:
Be the first armed lever of hollow square tube type, on a pair of relative sidewall of described the first armed lever, be respectively equipped with the sealing extending along the length direction of described the first armed lever, the sidepiece of a described sealing is provided with the first armed lever graduation mark, the zero graduation line of described the first armed lever graduation mark arranges near the outer end of described the first armed lever, position near its outer end on the bottom side of described the first armed lever is provided with the first armed lever chalk sleeve, and described the first armed lever chalk sleeve aligns with the zero graduation line of described the first armed lever;
Be set in the sliding sleeve on described the first armed lever, described sliding sleeve can slide along described the first armed lever, and on the sidewall of described sliding sleeve, corresponding described sealing place is provided with the form for calibrating;
The second armed lever that cross section is square, insert in described the first armed lever slidably the inner of described the second armed lever, the outer end dissociative of described the second armed lever, described the second armed lever is provided with the second armed lever graduation mark near a side of described form, the zero graduation line of described the second armed lever graduation mark arranges near the outer end of described the second armed lever, position near its outer end on the bottom side of described the second armed lever is provided with the second armed lever chalk sleeve, and described the second armed lever chalk sleeve aligns with the zero graduation line of described the second armed lever;
In the top side face of described sliding sleeve, be provided with screw, one end of described screw is passed the sidewall of described sliding sleeve and is relied in the top side face of described the first armed lever, for compressing described the second armed lever inserting in described the first armed lever;
With the backstay that the bottom side of described sliding sleeve is fixedly connected with, the bearing of trend of described backstay and described the first armed lever chalk sleeve, the second armed lever chalk sleeve are consistent.
2. telescopic concentric circles drawing instrument for mathematical education according to claim 1, is characterized in that, is also provided with the first armed lever graduation mark on the opposite side relative with a side that is provided with described the first armed lever graduation mark; On the opposite side relative with a side that is provided with described the second armed lever graduation mark, be also provided with the second armed lever graduation mark; Be provided with on the relative opposite side of a side of described form and be also provided with form with described sliding sleeve.
3. according to telescopic concentric circles drawing instrument for the mathematical education described in claim 1 to 2 any one, it is characterized in that, the bottom of described backstay is provided with sucker, and the bottom of described sucker and described backstay is rotationally connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420017156.6U CN203666190U (en) | 2014-01-10 | 2014-01-10 | Telescopic concentric circle plotting instrument for mathematics teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420017156.6U CN203666190U (en) | 2014-01-10 | 2014-01-10 | Telescopic concentric circle plotting instrument for mathematics teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203666190U true CN203666190U (en) | 2014-06-25 |
Family
ID=50962518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420017156.6U Expired - Fee Related CN203666190U (en) | 2014-01-10 | 2014-01-10 | Telescopic concentric circle plotting instrument for mathematics teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203666190U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108656801A (en) * | 2018-05-08 | 2018-10-16 | 吴烁 | A kind of mathematical education auxiliary teaching device applied to education and instruction |
| CN110816128A (en) * | 2019-11-20 | 2020-02-21 | 韩登利 | Special drawing device of higher mathematics |
| US11588434B2 (en) | 2019-06-18 | 2023-02-21 | Nextracker Llc | Expandable splice for a solar power system |
-
2014
- 2014-01-10 CN CN201420017156.6U patent/CN203666190U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108656801A (en) * | 2018-05-08 | 2018-10-16 | 吴烁 | A kind of mathematical education auxiliary teaching device applied to education and instruction |
| US11588434B2 (en) | 2019-06-18 | 2023-02-21 | Nextracker Llc | Expandable splice for a solar power system |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203666190U (en) | Telescopic concentric circle plotting instrument for mathematics teaching | |
| CN203623231U (en) | Multifunctional teaching tool | |
| CN207449473U (en) | Mathematical education camber line plotting unit | |
| CN204659290U (en) | A kind of integrated mathematical education survey tool | |
| CN208232657U (en) | A kind of mathematical education plotter | |
| CN206344602U (en) | A kind of senior middle school's literal arts writing on the blackboard marking-out rule | |
| CN208021051U (en) | A kind of ruler tool of mathematical education | |
| CN203305728U (en) | Compass for mathematics teaching | |
| CN204322845U (en) | A kind of conic section drawing tool | |
| CN203511082U (en) | Scriber for English teaching | |
| CN207403444U (en) | A kind of applied mathematics teaching combination drawing rule | |
| CN204451720U (en) | Teaching set square | |
| CN203974322U (en) | Piston absorbent-type compasses | |
| CN203567419U (en) | Mathematics teaching appliance | |
| CN204210208U (en) | A kind of mathematic(al) construction apparatus | |
| CN203937396U (en) | A kind of teaching aid of drawing oval arc angle line | |
| CN205929925U (en) | Novel multifunctional compass | |
| CN205468104U (en) | Blackboard is used how much to mathematics | |
| CN108162642A (en) | It is a kind of that there is the teaching ruler of compasses-ruler | |
| CN203496507U (en) | Multifunctional set square | |
| CN207901969U (en) | A kind of mathematics diagraph | |
| CN215153451U (en) | Diagraph for mathematics teaching | |
| CN203485638U (en) | Drawing tool for junior middle school mathematics teaching | |
| CN202685684U (en) | Teaching aid compasses | |
| CN208801779U (en) | A kind of multifunction teaching ruler |
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: 20140625 Termination date: 20150110 |
|
| EXPY | Termination of patent right or utility model |