CN201872476U - Free telescopic compasses - Google Patents
Free telescopic compasses Download PDFInfo
- Publication number
- CN201872476U CN201872476U CN2010206585270U CN201020658527U CN201872476U CN 201872476 U CN201872476 U CN 201872476U CN 2010206585270 U CN2010206585270 U CN 2010206585270U CN 201020658527 U CN201020658527 U CN 201020658527U CN 201872476 U CN201872476 U CN 201872476U
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- CN
- China
- Prior art keywords
- compasses
- chalk
- tube
- storekeeper
- hinged
- 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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Abstract
The utility model provides free telescopic compasses, belonging to the technical field of teaching instruments, comprising a sucking disc, a rotary shaft and a chalk accommodating tube, wherein the sucking disc is fixedly connected with the rotary shaft which is sleeved in a hinged support tube, an external thread tube is hinged on the hinged support tube through a hinged shaft and in thread connection with an internal thread tube, one end of the internal thread tube is connected with the chalk accommodating tube through a ball hinge, and an accommodating tube hoop is arranged on the periphery of the chalk accommodating tube and provided with a hook bolt. In the free telescopic compasses, the radius of the compasses is extended and shortened by the rotation of the thread connection of the thread tubes. The hinged shaft and ball hinge can make the compasses more convenient and agile during the use. The sucking disc can be adsorbed on the blackboard stably to fix a circle center, thereby avoiding the offset of the circle center. The hoop of the chalk accommodating tube makes the replacement and disassembly of chalk convenient. The compasses are convenient and agile and can meet the basic requirements of drawing well.
Description
Technical field
The utility model relates to the teaching equipment technical field, the telescopic compasses of specifically a kind of freedom.
Background technology
General, in the mathematical education process teacher sometimes on blackboard the drawing circular pattern to explain mathematical problem or other, the instrument of draw circles is varied in the prior art, wherein great majority are two leg formula compasses, two leg formula compasses need bipod to contact blackboard simultaneously and wherein between center of circle pin and the blackboard displacement can not be arranged painting bowlder, this has technological challenge to a certain extent concerning the illustrator, moreover on blackboard, draw circular pattern and so simple not as drawing on the table, the specification of drawing circular compasses on blackboard is bigger, action is difficult to control, brings to a certain extent inconvenience to the teacher.
Summary of the invention
Technical assignment of the present utility model is to solve the deficiencies in the prior art, provides a kind of freedom telescopic compasses.
The technical solution of the utility model realizes in the following manner, the telescopic compasses of this freedom, its structure comprises sucker, rotating shaft and chalk storekeeper, sucker is fixedlyed connected with rotating shaft, and rotating shaft is socketed in the free bearing pipe, is hinged with male-pipe by hinge on the free bearing pipe, male-pipe is threaded with riffled tube, riffled tube one end is connected with the chalk storekeeper by ball pivot, and chalk storekeeper outer periphery is equipped with the storekeeper clip, and the storekeeper clip is provided with the clip bolt.
The external screw thread of male-pipe and the internal thread of riffled tube match, and pitch is 2 centimetres.
The beneficial effect that the utility model is compared with prior art produced is:
The telescopic compasses of this freedom are realized the elongation and the shortening of compasses radius by the rotation that is threaded of screwed pipe, the setting of its hinge and ball pivot more can make the more convenient agility of compasses action in use, can not produce and paint that the bowlder chalk leaves blackboard and make that the path of circle is imperfect, thoroughly overcome the weak point of bifoot type compasses, sucker can be firm be adsorbed on the blackboard the fixedly center of circle, avoid departing from of the center of circle, chalk can be changed and dismantle to the clip setting of chalk storekeeper also very easily, convenient to use, be well positioned to meet and paint round basic demand, it is reasonable in design, simple in structure, easy to use, in the teaching equipment field of mathematics, use the teaching requirement that to satisfy day by day, help improving the quality of teaching.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Mark in the accompanying drawing is represented respectively:
1, sucker, 2, rotating shaft, 3, the free bearing pipe, 4, hinge, 5, male-pipe, 6, external screw thread, 7, riffled tube, 8, internal thread, 9, ball pivot, 10, the chalk storekeeper, 11, the storekeeper clip, 12, the clip bolt.
The specific embodiment
Below in conjunction with accompanying drawing the telescopic compasses of freedom of the present utility model are done following detailed description the in detail.
As shown in Figure 1, the telescopic compasses of freedom of the present utility model, its structure comprises sucker 1, rotating shaft 2 and chalk storekeeper 10, sucker 1 is fixedlyed connected with rotating shaft 2, and rotating shaft 2 is socketed in the free bearing pipe 3, is hinged with male-pipe 5 by hinge 4 on the free bearing pipe 3, male-pipe 5 is threaded with riffled tube 7, riffled tube 7 one ends are connected with chalk storekeeper 10 by ball pivot 9, and chalk storekeeper 10 outer periphery are equipped with storekeeper clip 11, and storekeeper clip 11 is provided with clip bolt 12.The external screw thread 6 of male-pipe and the internal thread 8 of riffled tube match, and pitch is 2 centimetres.
Claims (2)
1. free telescopic compasses, it is characterized in that comprising sucker, rotating shaft and chalk storekeeper, sucker is fixedlyed connected with rotating shaft, rotating shaft is socketed in the free bearing pipe, be hinged with male-pipe by hinge on the free bearing pipe, male-pipe is threaded with riffled tube, and riffled tube one end is connected with the chalk storekeeper by ball pivot, chalk storekeeper outer periphery is equipped with the storekeeper clip, and the storekeeper clip is provided with the clip bolt.
2. the telescopic compasses of freedom according to claim 1 is characterized in that the external screw thread of male-pipe and the internal thread of riffled tube match, and pitch is 2 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206585270U CN201872476U (en) | 2010-12-14 | 2010-12-14 | Free telescopic compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206585270U CN201872476U (en) | 2010-12-14 | 2010-12-14 | Free telescopic compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201872476U true CN201872476U (en) | 2011-06-22 |
Family
ID=44160409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206585270U Expired - Fee Related CN201872476U (en) | 2010-12-14 | 2010-12-14 | Free telescopic compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201872476U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442130A (en) * | 2011-10-22 | 2012-05-09 | 奇瑞汽车股份有限公司 | Graph plotter for plotting circles |
| CN103072410A (en) * | 2013-02-04 | 2013-05-01 | 李香秀 | Manual type large circle drawing device |
| CN106626906A (en) * | 2016-12-30 | 2017-05-10 | 徐书晗 | Multi-fixed-point compass assembly for teaching |
| CN108583084A (en) * | 2018-05-28 | 2018-09-28 | 喻正江 | A kind of compasses for teaching |
| CN108656801A (en) * | 2018-05-08 | 2018-10-16 | 吴烁 | A kind of mathematical education auxiliary teaching device applied to education and instruction |
-
2010
- 2010-12-14 CN CN2010206585270U patent/CN201872476U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442130A (en) * | 2011-10-22 | 2012-05-09 | 奇瑞汽车股份有限公司 | Graph plotter for plotting circles |
| CN103072410A (en) * | 2013-02-04 | 2013-05-01 | 李香秀 | Manual type large circle drawing device |
| CN103072410B (en) * | 2013-02-04 | 2015-09-09 | 慈溪市附海大奇电器厂 | A kind of hand draws Large circular coil apparatus |
| CN106626906A (en) * | 2016-12-30 | 2017-05-10 | 徐书晗 | Multi-fixed-point compass assembly for teaching |
| CN108656801A (en) * | 2018-05-08 | 2018-10-16 | 吴烁 | A kind of mathematical education auxiliary teaching device applied to education and instruction |
| CN108583084A (en) * | 2018-05-28 | 2018-09-28 | 喻正江 | A kind of compasses for teaching |
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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: 20110622 Termination date: 20111214 |