CN205033798U - Multifunctional teaching compasses - Google Patents
Multifunctional teaching compasses Download PDFInfo
- Publication number
- CN205033798U CN205033798U CN201520806669.XU CN201520806669U CN205033798U CN 205033798 U CN205033798 U CN 205033798U CN 201520806669 U CN201520806669 U CN 201520806669U CN 205033798 U CN205033798 U CN 205033798U
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- CN
- China
- Prior art keywords
- support arm
- chalk
- sleeve
- compasses
- fixed
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Abstract
The utility model relates to a compasses, in particular to multifunctional teaching compasses. This multifunctional teaching compasses, including the support arm, characterized by: be equipped with the horn craving scale on the support arm, the connection of the angle index portion of trying to get to the heart of a matter is equipped with the sleeve, and upward the sleeve lower part is inserted and is equipped with the lower sleeve, goes up and is fixed with the spring between sleeve and the lower sleeve, and the lower sleeve bottom is equipped with magnet, and the support arm is connected with the telescopic link, and the telescopic link is fixed through first bolt and support arm mutually. The beneficial effects of the utility model are that: when mapping on the blackboard, the fixed centre of a circle of being convenient for, and can conveniently fix the chalk, but the radius and the angle of the circular arc that the in -line readout is drawn need not frequently to adjust the chalk position, simple structure, convenient to use, for teaching work brought greatly convenient.
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.In addition, because the compasses strong point needs simultaneously concordant with blackboard surface with chalk point, but a mathematics class likely can be more figure, needs the adjustment often carrying out chalk, wastes time very much.
(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 connected with upper bush, upper bush bottom is inserted with lower sleeve, is fixed with spring between upper bush and lower sleeve, is provided with magnet bottom lower sleeve, support arm is connected with expansion link, and expansion link is fixed by the first bolt and support arm.
Described 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, without the need to frequently regulating chalk position; 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 upper bushes, 4 lower sleeves, 5 springs, 6 magnet, 7 expansion links, 8 first bolts, 9 chalks, 10 second bolts, 11 pointers, 12 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, support arm 1 is provided with horn craving scale 2, upper bush 3 is connected with bottom horn craving scale 2, upper bush 3 bottom is inserted with lower sleeve 4, spring 5 is fixed with between upper bush 3 and lower sleeve 4, be provided with magnet 6 bottom lower sleeve 4, support arm 1 is connected with expansion link 7, and expansion link 7 is fixed with support arm 1 by the first bolt 8.Expansion link 7 end is provided with chalk 9, and chalk 9 is fixed together with expansion link 7 by the second bolt 10.Support arm 1 is provided with pointer 11, and support arm 1 end is provided with handle 12.
Adopt a kind of multifunctional teaching compasses of the present utility model, horn craving scale 2 installs additional magnet 6, pin with hand during use, be convenient to the fixing center of circle; When mapping, can press down gently according to feel, under spring 5 acts on, upper bush 3 is descending along lower sleeve 4, and the chalk 9 after so can employing a period of time contacts blackboard surface, without the need to frequently regulating chalk 9.Expansion link 7 should install the first bolt 8, 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 9 passes from ring, and adds the second bolt 10 and fix.Make expansion link 7 and horn craving scale 2 with transparent material, expansion link 7 engraves graduation mark and pointer 11, just can read radius and the angle of drawn circular arc.
Claims (3)
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 connected with upper bush (3), upper bush (3) bottom is inserted with lower sleeve (4), is fixed with spring (5) between upper bush (3) and lower sleeve (4), and lower sleeve (4) bottom is provided with magnet (6), support arm (1) is connected with expansion link (7), and expansion link (7) is fixed by the first bolt (8) and support arm (1).
2. a kind of multifunctional teaching compasses according to claim 1, is characterized in that: described expansion link (7) end is provided with chalk (9), and chalk (9) is fixed together by the second bolt (10) and expansion link (7).
3. a kind of multifunctional teaching compasses according to claim 1, is characterized in that: described support arm (1) is provided with pointer (11), and support arm (1) end is provided with handle (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520806669.XU CN205033798U (en) | 2015-10-19 | 2015-10-19 | Multifunctional teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520806669.XU CN205033798U (en) | 2015-10-19 | 2015-10-19 | Multifunctional teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205033798U true CN205033798U (en) | 2016-02-17 |
Family
ID=55292724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520806669.XU Expired - Fee Related CN205033798U (en) | 2015-10-19 | 2015-10-19 | Multifunctional teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205033798U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106142922A (en) * | 2016-08-01 | 2016-11-23 | 万象设计江苏有限责任公司 | A kind of multifunction double-layer blackboard |
-
2015
- 2015-10-19 CN CN201520806669.XU patent/CN205033798U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106142922A (en) * | 2016-08-01 | 2016-11-23 | 万象设计江苏有限责任公司 | A kind of multifunction double-layer blackboard |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160217 Termination date: 20161019 |