CN201721205U - Compasses - Google Patents
Compasses Download PDFInfo
- Publication number
- CN201721205U CN201721205U CN2010201839016U CN201020183901U CN201721205U CN 201721205 U CN201721205 U CN 201721205U CN 2010201839016 U CN2010201839016 U CN 2010201839016U CN 201020183901 U CN201020183901 U CN 201020183901U CN 201721205 U CN201721205 U CN 201721205U
- Authority
- CN
- China
- Prior art keywords
- compasses
- vernier
- scale
- slider
- ruler
- 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)
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a pair of compasses, which comprise a suction cup, a ruler, a slider-fixing nut and a slider, the suction cup is fixed on one end of the ruler, the slider is fixed on the ruler by the slider-fixing nut, a slot is arranged on the central line of the scales of the ruler, and a round hole corresponding to the slot is arranged on the slider. The slider can slide on the ruler to adjust an accurate circle-drawing radius, the suction cup can fix the whole compasses on a blackboard, a variety of circles with the same circle center and different radii can be drawn, and moreover, the compasses have the advantages of high precision, convenient operation and simple structure.
Description
Technical field
The utility model relates to a kind of compasses, relates in particular to a kind of compasses of blackboard upper drawing circle.
Background technology
In the past during the blackboard upper drawing circle, the center of circle fulcrum of compasses moves easily and does not draw the circle of a plurality of phase concentrics, even also can not draw a complete circle.Also need when we draw on blackboard sometimes to come the picture material can draw figure according to concrete size, existing compasses all are difficult to reach, and draw during so just to teaching and have brought very big inconvenience.
Summary of the invention
In order to address the above problem, the utility model provides a kind of compasses, moves on slide calliper rule by vernier and adjusts accurate picture radius of circle, and sucker is fixed on whole device on the blackboard, and the different circle of multiple same center of circle radius can draw.
A kind of compasses, comprise sucker, scale, vernier fixed screw and vernier, described sucker is fixed on an end of scale, and described vernier is installed on the scale by the vernier fixed screw, be dead slot on the center line of described scale label, the circular hole corresponding with described dead slot is set on the described vernier.
Chalk inserts from described dead slot and circular hole;
Described sucker is threaded with scale, coincide with described circular hole;
The diameter of described vernier fixed screw is less than the width of described dead slot.
The beneficial effects of the utility model are: be fixed on the blackboard by sucker, regulate can the draw circle of a center of circle, accurate dimension radius of the scale of vernier on scale, drawing in the teaching has been brought convenience, and these compasses are simple in structure, easy to operate, and cost is low.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is connected to the structural representation of scale for sucker;
Fig. 3 is connected to the structural representation of scale for vernier.
The specific embodiment
Be illustrated in figure 1 as structural representation of the present utility model, a kind of compasses, comprise sucker 1, scale 2, vernier 3 and vernier fixed screw 5, described sucker 1 is fixed on an end of scale 2, described vernier 3 is installed on the scale 2 by vernier fixed screw 5, be dead slot 4 on the center line of described scale 2 scales, the circular hole 6 corresponding with described dead slot 4 is set on the described vernier 3.
Be illustrated in figure 2 as the connection diagram of sucker 1, be provided with vertical screw 7 at the center of sucker 1, screw 7 is fixedly connected on the initial end of scale label by nut.
Be illustrated in figure 3 as the connection diagram of vernier 3, vernier 3 is installed on the scale 2 by vernier fixed screw 5, wherein the diameter of vernier fixed screw 5 is less than the width of described dead slot 4, can guarantee that vernier fixed screw 5 fixing verniers 3 move, and so just can control required picture radius of a circle on scale 2.
On described vernier 3, be provided with dead slot 4 corresponding circular holes 6, the chalk 8 of can packing into, chalk 8 pass circular hole 6 and dead slot 4, coincide with described circular hole 6, are fixed on the circular hole 6, when drawing circle, chalk 8 can not come off because be fixed on top.
Claims (4)
1. compasses, it is characterized in that comprising sucker, scale, vernier fixed screw and vernier, described sucker is fixed on an end of scale, described vernier is installed on the scale by the vernier fixed screw, be dead slot on the center line of described scale label, the circular hole corresponding with described dead slot is set on the described vernier.
2. a kind of compasses as claimed in claim 1 is characterized in that, chalk inserts from described dead slot and circular hole, coincide with described circular hole.
3. a kind of compasses as claimed in claim 1 is characterized in that described sucker is threaded with scale.
4. a kind of compasses as claimed in claim 1 is characterized in that the diameter of described vernier fixed screw is less than the width of described dead slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201839016U CN201721205U (en) | 2010-04-29 | 2010-04-29 | Compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201839016U CN201721205U (en) | 2010-04-29 | 2010-04-29 | Compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201721205U true CN201721205U (en) | 2011-01-26 |
Family
ID=43489499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201839016U Expired - Fee Related CN201721205U (en) | 2010-04-29 | 2010-04-29 | Compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201721205U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659785A (en) * | 2013-10-15 | 2014-03-26 | 浙江吉利控股集团有限公司 | Vernier scribing compasses |
| CN107284087A (en) * | 2017-07-19 | 2017-10-24 | 郑金风 | A kind of teaching aid compasses |
| CN110654145A (en) * | 2018-06-29 | 2020-01-07 | 白天畅 | Gyro compasses |
-
2010
- 2010-04-29 CN CN2010201839016U patent/CN201721205U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659785A (en) * | 2013-10-15 | 2014-03-26 | 浙江吉利控股集团有限公司 | Vernier scribing compasses |
| CN107284087A (en) * | 2017-07-19 | 2017-10-24 | 郑金风 | A kind of teaching aid compasses |
| CN110654145A (en) * | 2018-06-29 | 2020-01-07 | 白天畅 | Gyro compasses |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201721205U (en) | Compasses | |
| CN203241019U (en) | Flatness test rack | |
| CN203881286U (en) | A combined piston coaxiality detection measuring tool | |
| CN103115550A (en) | Adjustable pitch measuring device | |
| CN204664784U (en) | Portable air distributing device adjustable support | |
| CN204128473U (en) | A kind of simple type groove depth measurement mechanism | |
| CN204373843U (en) | A kind of load transducer verification platform | |
| CN204373552U (en) | For the cubing of notebook-type computer screen bracing strut | |
| CN203869709U (en) | Adjustable forced centering plate | |
| CN203172274U (en) | Modified compasses | |
| CN203266468U (en) | Assembling and locating plate for photoelectric receiving module of encoder | |
| CN202433025U (en) | Fixture structure with finely adjustable angle | |
| CN205761301U (en) | A kind of test tube rack | |
| CN204666175U (en) | A kind of novel simple dial framework | |
| CN202225635U (en) | Multi-functional scriber | |
| CN206733901U (en) | A kind of Novel ruler compasses | |
| CN201849162U (en) | Compass ruler | |
| CN202029589U (en) | Parallel line running rule | |
| CN204044397U (en) | A kind of optical fiber collimator | |
| CN202420964U (en) | Scribing device for cylindrical test samples of elastic modulus of concrete | |
| CN203046630U (en) | Compasses for drawing concentric circles | |
| CN201525221U (en) | Anti-skidding compass | |
| CN201974132U (en) | Novel height-measuring tool | |
| CN102442130B (en) | Graph plotter for plotting circles | |
| CN203209077U (en) | Chemical experiment erector |
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: 20110126 Termination date: 20110429 |