CN204622930U - A kind of mathematic compasses - Google Patents
A kind of mathematic compasses Download PDFInfo
- Publication number
- CN204622930U CN204622930U CN201520338455.4U CN201520338455U CN204622930U CN 204622930 U CN204622930 U CN 204622930U CN 201520338455 U CN201520338455 U CN 201520338455U CN 204622930 U CN204622930 U CN 204622930U
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- China
- Prior art keywords
- pin
- swingle
- hinged
- center
- circumference
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- Expired - Fee Related
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Abstract
A kind of mathematic compasses, the utility model relates to mathematic compasses.Existing compasses effect is single, not portable, easily injures blackboard, the problem of concentric circles technique of painting complexity.Angle dish at quarter, center of circle pin and circumference pin are hinged, center of circle pin and circumference pin are respectively equipped with the first guide rail and the second guide rail, be respectively equipped with first in first guide rail and the second guide rail to move bolt and second and move bolt, expansion link is fixed on first and moves bolt and second and move on bolt; Center of circle pin and surface, circumference underfooting are respectively equipped with the first swingle and the second swingle, and the first swingle, head rod and surface, underfooting, the center of circle are hinged; The other end of head rod and one end of the second connecting rod hinged, the other end of the second connecting rod is provided with the first chalk clamp; Second swingle and surface, circumference underfooting hinged; Center of circle pin and rotating shaft hinged, sucker is connected with rotating shaft; Circumference pin and the first fork and the second fork hinged, the lower end of the first fork is provided with the second chalk clamp, and the lower end of the second fork is provided with chalkboard eraser.
Description
Technical field
The utility model relates to mathematic compasses.
Background technology
Mathematics teacher explains in geometric knowledge process, need to make on blackboard to demonstrate compared with the figure of standard, deepen the directly perceived understanding of student to geometric knowledge, set square and compasses are the most frequently used drafting instrument, in present teaching aid, set square and compasses are and are used alone, and mathematic compasses effect is single, in teaching process, teaching aid compares dispersion, not portable.And in teaching process, need picture bowlder, all adopt compasses for teaching, common compasses wherein fixing feet adopt syringe needle, another leg fixes paintbrush, and during use, syringe needle easily injures blackboard, usually when drawing concentrically ringed, need picture several times, inconvenience very.
Utility model content
The purpose of this utility model is to provide a kind of mathematic compasses.Single to solve existing mathematic compasses effect, in teaching process, teaching aid compares dispersion, not portable, and mathematic compasses existence easily injures blackboard, the problem of concentric circles technique of painting complexity.
A kind of mathematic compasses of the utility model comprises angle dish at quarter, center of circle pin, circumference pin, expansion link, head rod, the second connecting rod, the first chalk clamp, rotating shaft, sucker, the first fork, the second fork, the second chalk clamp, chalkboard eraser, the first swingle and the second swingle;
Angle dish at quarter, center of circle pin and circumference pin are hinged, center of circle pin front surface is provided with the first guide rail, circumference pin front surface is provided with the second guide rail, be provided with first in first guide rail and move bolt, be provided with second in second guide rail and move bolt, one end of expansion link is fixed on first and moves on bolt, and the other end of expansion link is fixed on second and moves on bolt;
Pin rear surface, the center of circle is provided with the first swingle along its length, is hinged bottom the first described swingle bottom, one end of head rod and pin rear surface, the center of circle; The other end of head rod and one end of the second connecting rod are hinged, and the other end of the second connecting rod is provided with the first chalk clamp;
Circumference pin rear surface is provided with the second swingle along its length, is hinged bottom the second described swingle bottom and circumference pin rear surface;
The first described swingle top is provided with pin, and the second swingle top is provided with gap, and pin matches with gap;
The upper end of underfooting, center of circle end and rotating shaft is hinged, and sucker is connected with the lower end of rotating shaft by universal joint;
The upper end of circumference underfooting end and the first fork and the upper end of the second fork are hinged, and the lower end of the first fork is provided with the second chalk clamp, and the lower end of the second fork is provided with chalkboard eraser.
The beneficial effects of the utility model are: 1, when the second chalk clamp turns in downward direction, and side chalkboard eraser being turned to circumference pin to time, the circle of arbitrary dimension and size can be drawn out as required; 2, when chalkboard eraser turns in downward direction, and the side the second chalk clamp being turned to circumference pin to time, the drawn circle of wiping can be facilitated; 3, by regulating head rod and the second connecting rod, the first chalk clamp is used can to draw concentric circles as required, convenient and practical.4, by rotation first swingle and the second swingle, and pin is matched with gap, corresponding quadrangle can be drawn.5, move the position and second of bolt in the first guide rail by adjustment first and move the position of bolt in the second guide rail, adapt to the length changing expansion link, the triangle of arbitrary size and shape can be drawn; 6, read the anglec of rotation by angle dish at quarter, and draw the angle of respective angles; 7, fixed by compasses by sucker, during use, the center of circle can not be moved, the circle drawn very rounding; 8, sucker is connected with the lower end of rotating shaft by universal joint, and during use, center of circle pin is free to rotate; 9, the utility model one is advised multiplex, improves efficiency of teaching, is easy to carry, with low cost, is easy to large-scale promotion application.
The utility model is used for a kind of mathematic compasses.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of mathematic compasses of the utility model;
Fig. 2 is the rearview of a kind of mathematic compasses of the utility model;
Fig. 3 is the schematic diagram of a kind of mathematic compasses of the utility model when using.
Detailed description of the invention
Technical solution of the present invention is not limited to following cited detailed description of the invention, also comprises any combination between each detailed description of the invention.
Detailed description of the invention one: illustrate present embodiment below in conjunction with Fig. 1 to 3.A kind of mathematic compasses of present embodiment comprises that angle to coil 1 quarter, center of circle pin 2, circumference pin 3, expansion link 4, head rod 5, second connecting rod 6, first chalk clamp 7, rotating shaft 8, sucker 10, first fork 11, second fork 12, second chalk clamp 13, chalkboard eraser 14, first swingle 15 and the second swingle 16;
Angle to coil 1 quarter, center of circle pin 2 is hinged with circumference pin 3, center of circle pin 2 front surface is provided with the first guide rail 2-1, circumference pin 3 front surface is provided with the second guide rail 3-1, be provided with first in first guide rail 2-1 and move bolt 2-2, be provided with second in second guide rail 3-1 and move bolt 3-2, one end of expansion link 4 is fixed on first and moves on bolt 2-2, and the other end of expansion link 4 is fixed on second and moves on bolt 3-2;
Center of circle pin 2 rear surface is provided with the first swingle 15 along its length, is hinged bottom the first described swingle 15 bottom, one end of head rod 5 and center of circle pin 2 rear surface; The other end of head rod 5 and one end of the second connecting rod 6 are hinged, and the other end of the second connecting rod 6 is provided with the first chalk clamp 7;
Circumference pin 3 rear surface is provided with the second swingle 16 along its length, is hinged bottom the second described swingle 16 bottom and circumference pin 3 rear surface;
The first described swingle 15 top is provided with pin 15-1, and the second swingle 16 top is provided with gap 16-1, and pin 15-1 matches with gap 16-1;
The upper end of center of circle pin 2 lower end and rotating shaft 8 is hinged, and sucker 10 is connected by the lower end of universal joint 9 with rotating shaft 8;
The upper end of circumference pin 3 lower end and the first fork 11 and the upper end of the second fork 12 are hinged, and the lower end that the lower end of the first fork 11 is provided with the second chalk clamp 13, second fork 12 is provided with chalkboard eraser 14.
The beneficial effect of detailed description of the invention is: 1, when the second chalk clamp 13 turns in downward direction, and side chalkboard eraser 14 being turned to circumference pin 3 to time, the circle of arbitrary dimension and size can be drawn out as required; 2, when chalkboard eraser 14 turns in downward direction, and the side the second chalk clamp 13 being turned to circumference pin 3 to time, the drawn circle of wiping can be facilitated; 3, by regulating head rod 5 and the second connecting rod 6, the first chalk clamp 7 is used can to draw concentric circles as required, convenient and practical.4, by rotation first swingle 15 and the second swingle 16, and pin 15-1 is matched with gap 16-1, corresponding quadrangle can be drawn.5, move the position and second of bolt 2-2 in the first guide rail 2-1 by adjustment first and move the position of bolt 3-2 in the second guide rail 3-1, adapt to the length changing expansion link 4, the triangle of arbitrary size and shape can be drawn; 6, coil the 1 reading anglec of rotation quarter by angle, and draw the angle of respective angles; 7, fixed by compasses by sucker 10, during use, the center of circle can not be moved, the circle drawn very rounding; 8, sucker 10 is connected by the lower end of universal joint 9 with rotating shaft 8, and during use, center of circle pin 2 is free to rotate; 9, the utility model one is advised multiplex, improves efficiency of teaching, is easy to carry, with low cost, is easy to large-scale promotion application.
Claims (1)
1. a mathematic compasses, is characterized in that a kind of mathematic compasses comprises angle dish at quarter (1), center of circle pin (2), circumference pin (3), expansion link (4), head rod (5), the second connecting rod (6), the first chalk clamp (7), rotating shaft (8), sucker (10), the first fork (11), the second fork (12), the second chalk clamp (13), chalkboard eraser (14), the first swingle (15) and the second swingle (16);
Angle dish at quarter (1), center of circle pin (2) are hinged with circumference pin (3), center of circle pin (2) front surface is provided with the first guide rail (2-1), circumference pin (3) front surface is provided with the second guide rail (3-1), be provided with first in first guide rail (2-1) and move bolt (2-2), be provided with second in second guide rail (3-1) and move bolt (3-2), one end of expansion link (4) is fixed on first and moves on bolt (2-2), and the other end of expansion link (4) is fixed on second and moves on bolt (3-2);
Center of circle pin (2) rear surface is provided with the first swingle (15) along its length, is hinged bottom described the first swingle (15) bottom, one end of head rod (5) and center of circle pin (2) rear surface; The other end of head rod (5) and one end of the second connecting rod (6) are hinged, and the other end of the second connecting rod (6) is provided with the first chalk clamp (7);
Circumference pin (3) rear surface is provided with the second swingle (16) along its length, is hinged bottom described the second swingle (16) bottom and circumference pin (3) rear surface;
Described the first swingle (15) top is provided with pin (15-1), and the second swingle (16) top is provided with gap (16-1), and pin (15-1) matches with gap (16-1);
The upper end of center of circle pin (2) lower end and rotating shaft (8) is hinged, and sucker (10) is connected by the lower end of universal joint (9) with rotating shaft (8);
The upper end of circumference pin (3) lower end and the first fork (11) and the upper end of the second fork (12) are hinged, the lower end of the first fork (11) is provided with the second chalk clamp (13), and the lower end of the second fork (12) is provided with chalkboard eraser (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520338455.4U CN204622930U (en) | 2015-05-22 | 2015-05-22 | A kind of mathematic compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520338455.4U CN204622930U (en) | 2015-05-22 | 2015-05-22 | A kind of mathematic compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204622930U true CN204622930U (en) | 2015-09-09 |
Family
ID=54041988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520338455.4U Expired - Fee Related CN204622930U (en) | 2015-05-22 | 2015-05-22 | A kind of mathematic compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204622930U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202984A (en) * | 2019-05-24 | 2019-09-06 | 南阳理工学院 | A kind of mathematical education adjustable type compasses |
-
2015
- 2015-05-22 CN CN201520338455.4U patent/CN204622930U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202984A (en) * | 2019-05-24 | 2019-09-06 | 南阳理工学院 | A kind of mathematical education adjustable type compasses |
| CN110202984B (en) * | 2019-05-24 | 2020-10-02 | 南阳理工学院 | Adjustable compasses for mathematical education |
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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: 20150909 Termination date: 20160522 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |