CN201913962U - Novel compass instrument - Google Patents
Novel compass instrument Download PDFInfo
- Publication number
- CN201913962U CN201913962U CN2010206596773U CN201020659677U CN201913962U CN 201913962 U CN201913962 U CN 201913962U CN 2010206596773 U CN2010206596773 U CN 2010206596773U CN 201020659677 U CN201020659677 U CN 201020659677U CN 201913962 U CN201913962 U CN 201913962U
- Authority
- CN
- China
- Prior art keywords
- elongated slot
- bolt
- chalk
- radius
- center
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a novel compass instrument which comprises a rubber suction cup, a radius ruler marked with length scales and an angular measurement disc marked with angle scales; a bolt I is connected with the center of the suction cup, the end of the radius ruler and the center of the angular measurement disc respectively in sequence; the suction cup and the angular measurement disc are fixed together through the bolt I; the radius ruler positioned between the suction cup and the angular measurement disc can rotate around the bolt I; an elongated slot I and an elongated slot II which are parallel to each other are formed on the radius ruler respectively; the width of the elongated slot I is slightly greater than the diameter of a chalk; a chalk fixing ring capable of sliding along the elongated slot II is fixed on the elongated slot II through a bolt II; a circular hole formed on the chalk fixing ring is positioned above the elongated slot I; and the diameter of the circular hole is equal to the width of the elongated slot I. The compass instrument has the characteristics of low production and processing cost and convenience in operation and use.
Description
Technical field
The utility model relates to a kind of instruments used for education, relates in particular to a kind of compasses teaching aid.
Background technology
Compasses are one of very important teaching aid in the teaching in each stage, but traditional compasses teaching aid uses inconvenient and dangerous, fixedly the tip in the center of circle is easy to skid on blackboard, the fixing bad picture circle failure that causes, the other end is put the chalk place and is also often caused chalk to fracture, and delays instructional blocks of time.Moreover draw fan-shaped very difficultly, and do not know the definite number of degrees that draw, need to measure once more just can know.
Summary of the invention
For solving the problem of above existence, the utility model provides a kind of fixedly center of circle and can draw fan-shaped a kind of novel bow compass instrument, and its technical scheme of taking is:
This compasses instrument comprises rubber suction cups, indicate the radius chi and the angulation dish that indicates angle index of length scale, bolt I connects the center of sucker successively, the center of the end of radius chi and angulation dish, sucker is in the same place by bolting with the angulation dish, radius chi between sucker and angulation dish can rotate around bolt, offer the elongated slot I and the elongated slot II that are parallel to each other on the radius chi, the width of elongated slot I equals the average diameter of chalk, can be fixed on the elongated slot II by bolt II along the chalk retainer ring that elongated slot II slides, the circular hole of offering on the chalk retainer ring be positioned at elongated slot I directly over, the diameter of circular hole equals the width of elongated slot I.
On bolt, be with the bearing of fixedlying connected with the radius chi.
This compasses instrument is fixed on the center of circle on the blackboard by sucker, solved traditional compasses instrument needle point problem of unstable, and it is accurate to draw, and safety is not hindered hand; Scale on the radius chi can mark drawn radius of a circle, need not to remeasure; Also can draw the circular and fan-shaped of the central angle of the radius of random length, any number of degrees, any radius length, can also make ruler and use.
This compasses instrument has production and processing cost characteristics low, easy for operation.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the upward view of Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
As depicted in figs. 1 and 2, mark length scale on radius chi 3, mark is spent to the angle index 360 degree from 0 on the angulation dish 4, sucker 2 adopts elastomeric material to make, bolt 1 passes the center of sucker 2, the end of radius chi 3 and the center of angulation dish 4 successively, they are close together, and sucker 2 and angulation dish 4 are fixed together by bolt 1, and the bearing holder (housing, cover) between sucker 2 and angulation dish 4 is on bolt.
Claims (2)
1. novel bow compass instrument, comprise rubber suction cups (2), indicate the radius chi (3) of length scale and indicate the angulation dish (4) of angle index, it is characterized in that: bolt (1) connects the center of sucker (2) successively, the center of the end of radius chi (3) and angulation dish (4), sucker (2) and angulation dish (4) are fixed together by bolt (1), the radius chi (3) that is positioned between sucker (2) and the angulation dish (4) can rotate around bolt (1), offer the elongated slot I (5) and the elongated slot II (6) that are parallel to each other on the radius chi (3), the width of elongated slot I (5) is slightly larger than the diameter of chalk, can be fixed on the elongated slot II (6) by bolt II (8) along the chalk retainer ring (7) that elongated slot II (6) slides, the circular hole of offering on the chalk retainer ring (7) be positioned at elongated slot I (5) directly over, the diameter of circular hole equals the width of elongated slot I (5).
2. a kind of novel bow compass instrument according to claim 1 is characterized in that: be with the bearing of fixedlying connected with radius chi (3) on bolt (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206596773U CN201913962U (en) | 2010-12-03 | 2010-12-03 | Novel compass instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206596773U CN201913962U (en) | 2010-12-03 | 2010-12-03 | Novel compass instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201913962U true CN201913962U (en) | 2011-08-03 |
Family
ID=44413776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206596773U Expired - Fee Related CN201913962U (en) | 2010-12-03 | 2010-12-03 | Novel compass instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201913962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103568663A (en) * | 2013-11-14 | 2014-02-12 | 上海理工大学 | Combined drawing tool |
-
2010
- 2010-12-03 CN CN2010206596773U patent/CN201913962U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103568663A (en) * | 2013-11-14 | 2014-02-12 | 上海理工大学 | Combined drawing tool |
| CN103568663B (en) * | 2013-11-14 | 2015-07-15 | 上海理工大学 | Combined drawing tool |
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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: 20110803 Termination date: 20111203 |