CN204296303U - A kind of multifunctional teaching compasses - Google Patents
A kind of multifunctional teaching compasses Download PDFInfo
- Publication number
- CN204296303U CN204296303U CN201420709907.0U CN201420709907U CN204296303U CN 204296303 U CN204296303 U CN 204296303U CN 201420709907 U CN201420709907 U CN 201420709907U CN 204296303 U CN204296303 U CN 204296303U
- Authority
- CN
- China
- Prior art keywords
- support arm
- expansion link
- chalk
- compasses
- bolt
- 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 relates to a kind of compasses, particularly a kind of multifunctional teaching compasses.This multifunctional teaching compasses, comprise support arm, it is characterized in that: described support arm is provided with horn craving scale, angle index tray bottom is provided with magnet, support arm is connected with expansion link, expansion link is fixed by the first bolt and support arm, and expansion link end is provided with chalk, and chalk is fixed together by the second bolt and expansion link.The beneficial effects of the utility model are: when mapping on blackboard, are convenient to the fixing center of circle, and conveniently can fix chalk, immediately can read radius and the angle of drawn circular arc; Structure is simple, easy to use, for teaching brings greatly facility.
Description
(1) technical field
The utility model relates to a kind of compasses, particularly a kind of multifunctional teaching compasses.
(2) background technology
In middle and primary schools' teaching, compasses are one of conventional instruments.But under current technology, when blackboard uses compasses, there are problems: blackboard is vertical, when mapping thereon, the center of circle is wayward, often there will be the phenomenon of skidding; Also harsher to the requirement of chalk, long or too shortly all cannot to map; Cannot be read it fast and do round arc radius and angle.
(3) summary of the invention
The utility model, in order to make up the deficiencies in the prior art, provides the multifunctional teaching compasses that a kind of structure is simple, easy to use.
The utility model is achieved by the following technical solution:
A kind of multifunctional teaching compasses, comprise support arm, it is characterized in that: described support arm is provided with horn craving scale, angle index tray bottom is provided with magnet, support arm is connected with expansion link, expansion link is fixed by the first bolt and support arm, and expansion link end is provided with chalk, and chalk is fixed together by the second bolt and expansion link.
Described support arm is provided with pointer, and leg extremities is provided with handle.
The beneficial effects of the utility model are: when mapping on blackboard, are convenient to the fixing center of circle, and conveniently can fix chalk, immediately can read radius and the angle of drawn circular arc; Structure is simple, easy to use, for teaching brings greatly facility.
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing 1 is main TV structure schematic diagram of the present utility model;
Accompanying drawing 2 is left TV structure schematic diagram of the present utility model;
In figure, 1 support arm, 2 horn craving scales, 3 magnet, 4 expansion links, 5 first bolts, 6 chalks, 7 second bolts, 8 pointers, 9 handles.
(5) detailed description of the invention
Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment comprises support arm 1, and support arm 1 is provided with horn craving scale 2, is provided with magnet 3 bottom horn craving scale 2, support arm 1 is connected with expansion link 4, expansion link 4 is fixed with support arm 1 by the first bolt 5, and expansion link 4 end is provided with chalk 6, and chalk 6 is fixed together with expansion link 4 by the second bolt 7.Support arm 1 is provided with pointer 8, and support arm 1 end is provided with handle 9.
Adopt a kind of multifunctional teaching compasses of the present utility model, horn craving scale 2 installs additional magnet 3, pin with hand during use, be convenient to the fixing center of circle; Expansion link 4 should install the first bolt 5, otherwise easily slides during mapping.And compasses require harsher to chalk, long or too shortly all cannot map, chalk clamp is made into hollow ring, and chalk 6 passes from ring, and adds the second bolt 7 and fix.Make expansion link 4 and horn craving scale 2 with transparent material, expansion link 4 engraves graduation mark and pointer 8, just can read radius and the angle of drawn circular arc.
Claims (1)
1. a multifunctional teaching compasses, comprise support arm (1), it is characterized in that: described support arm (1) is provided with horn craving scale (2), horn craving scale (2) bottom is provided with magnet (3), support arm (1) is connected with expansion link (4), expansion link (4) is fixed by the first bolt (5) and support arm (1), expansion link (4) end is provided with chalk (6), chalk (6) is fixed together by the second bolt (7) and expansion link (4), support arm (1) is provided with pointer (8), and support arm (1) end is provided with handle (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420709907.0U CN204296303U (en) | 2014-11-24 | 2014-11-24 | A kind of multifunctional teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420709907.0U CN204296303U (en) | 2014-11-24 | 2014-11-24 | A kind of multifunctional teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204296303U true CN204296303U (en) | 2015-04-29 |
Family
ID=53101878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420709907.0U Expired - Fee Related CN204296303U (en) | 2014-11-24 | 2014-11-24 | A kind of multifunctional teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204296303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105774328A (en) * | 2016-04-21 | 2016-07-20 | 赵崇儒 | Multi-functional compasses |
-
2014
- 2014-11-24 CN CN201420709907.0U patent/CN204296303U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105774328A (en) * | 2016-04-21 | 2016-07-20 | 赵崇儒 | Multi-functional compasses |
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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: 20150429 Termination date: 20151124 |