CN2905479Y - Circle center positioning reliable compasses - Google Patents
Circle center positioning reliable compasses Download PDFInfo
- Publication number
- CN2905479Y CN2905479Y CN 200620096798 CN200620096798U CN2905479Y CN 2905479 Y CN2905479 Y CN 2905479Y CN 200620096798 CN200620096798 CN 200620096798 CN 200620096798 U CN200620096798 U CN 200620096798U CN 2905479 Y CN2905479 Y CN 2905479Y
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- CN
- China
- Prior art keywords
- center
- spring
- pole
- locating
- compasses
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- 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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- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
The utility model relates to the compasses with a reliable fixation center, which comprises a painting pole, a pole sheath, a lead core, a supporting pole, a change-over joint, a spring, a center needle, a locating casing, a handle and a central axis, wherein a changing-over joint is increased between the front end rod head and the center needle, the changing-over joint and the center needle are sheathed with a cylinder spring, the side of the out diameter of the spring is closely connected to the cylinder groove arranged in the locating groove and the entire locating casing covers the end of the supporting rod, the changing-over joint, the center needle and the spring into the groove. When the center needle points are inserted into the paper, by means of the resistance of the rubber contacting surface of the locating casing as well as the gyrating force of the changing-over joint, the reliable locating center can be achieved and the standard circle can be drawn out, thereby characterized by artful design, simple structure, reliable use and practical utility.
Description
Technical field
The utility model relates to a kind of improvement of compasses, exactly, it is a kind of keeping under the constant substantially prerequisite of existing compasses structure, sets up a locating cover between pole and center of circle pin, the compasses in a commutation joint and the center of circle, reliable location that spring constituted.
Background technology
Now, well-known compasses are one of students in middle and primary schools' learning tools commonly used.But, existing compasses, the location only is inserted on the paper with the center of circle pin syringe needle point during center of circle, and often because of needle point is too little, difficulty or ease are fixed, and troublesome poeration not only, and easily pull open paper is also drawn nonstandardly, gives to do to inscribe and causes many misunderstandings, and this is that each classmate is reluctant to see.
Summary of the invention
The purpose of this utility model, be to overcome the deficiency of prior art exactly, and a kind of the reservation under the constant substantially prerequisite of existing compasses structure that designs and produces, set up a locating cover, the compasses in a commutation joint and the center of circle, reliable location that spring constituted between pole and center of circle pin.
The utility model structurally constitutes by drawing bar, bar cover, lead for retractable pencil, pole, commutation joint, spring, center of circle pin, locating cover, handle, axis etc. successively.
Technical characterictic of the present utility model has three: one, described locating cover are hemispherical, and its top is provided with an inclined hole, and its inside is provided with a cylinder shape groove, and locating cover all covers on the pole termination in the groove together with commutation joint, center of circle pin and spring.Its two, the commutation joint is spherical shape, the inclined hole of its top on locating cover and pole termination closely connect mutually, and with its top the relevant position are provided with a center of circle pin, the two is closely connection mutually.Its three, described spring, for cylindrical, the cylinder shape groove wall of establishing in its external diameter side and the locating cover closely is connected mutually, its top is that nested type is connected with the joint that commutates.
The utility model is based on set up a locating cover between pole and center of circle pin, a commutation joint and a spring, locating cover is made with rubber in addition, the commutation joint is made with bearing, and spring tension is strong, therefore when center of circle pin mark is inserted on the paper, by locating cover rubber stiction, and the revolving force freely of commutation joint, can accomplish rightly by locating the center of circle, draw standard round.It is ingenious, simple in structure to have design, uses characteristics such as reliable, practical.
Description of drawings
Fig. 1 is the utility model overall structure schematic diagram.Wherein, the 1st, picture bar, the 2nd, bar cover, the 3rd, lead for retractable pencil, the 4th, pole, the 5th, commutation joint, the 6th, spring, the 7th, center of circle pin, the 8th, locating cover, the 9th, groove, the 10th, inclined hole, the 11st, handle, the 12nd, axis.
Specific embodiments
Fig. 1 also is the utility model specific embodiment.Wherein, draw bar, the bar cover, lead for retractable pencil, pole and handle, axis is for keeping existing compasses shape and structure.Different is to have set up a commutation joint between pole front end bar head and the center of circle pin, and the commutation joint is together with being nested with a helical spring outside the pin of the center of circle, the cylinder shape groove of establishing in this spring external diameter side and the locating cover closely is connected mutually, whole locating cover is with the pole termination, together with the commutation joint, center of circle pin and spring all cover in the groove.What deserves to be explained is the radius of the bigger locating cover of center of circle pin, just insert paper with needle point and be advisable.
Claims (2)
1, the compasses in the center of circle, a kind of reliable location, constitute by drawing bar (1), bar cover (2), lead for retractable pencil (3), pole (4), commutation joint (5), spring (6), center of circle pin (7), locating cover (8), handle (11) and axis (12), it is characterized in that: described locating cover (8) is for hemispherical, its top is provided with an inclined hole (10), its inside is provided with a cylinder shape groove (9), and locating cover (8) is the termination of pole (4), together with commutation joint (5), center of circle pin (7) and spring (6) all the enclosures in groove (9).
2, according to the described compasses of claim 1, it is characterized in that described commutation joint (5) is spherical shape, inclined hole (10) on its top footpath locating cover (8) closely connects mutually with the termination of pole (4), and is provided with one barrel of center of circle pin (7) with its top opposite position, and the two closely connects mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620096798 CN2905479Y (en) | 2006-05-23 | 2006-05-23 | Circle center positioning reliable compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620096798 CN2905479Y (en) | 2006-05-23 | 2006-05-23 | Circle center positioning reliable compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2905479Y true CN2905479Y (en) | 2007-05-30 |
Family
ID=38114111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620096798 Expired - Fee Related CN2905479Y (en) | 2006-05-23 | 2006-05-23 | Circle center positioning reliable compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2905479Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103144092A (en) * | 2013-01-25 | 2013-06-12 | 李香秀 | Antiskid scribing compass for fitter |
| CN105383213A (en) * | 2015-12-11 | 2016-03-09 | 苏州市启扬商贸有限公司 | Tripod compass |
| CN111452543A (en) * | 2020-04-13 | 2020-07-28 | 湖州禾辞电子商务有限公司 | Anti-deviation learning compasses based on worm gear transmission |
-
2006
- 2006-05-23 CN CN 200620096798 patent/CN2905479Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103144092A (en) * | 2013-01-25 | 2013-06-12 | 李香秀 | Antiskid scribing compass for fitter |
| CN103144092B (en) * | 2013-01-25 | 2015-08-19 | 慈溪市附海红莲塑料制品厂 | A kind of pincers worker is plan with anti-slip |
| CN105383213A (en) * | 2015-12-11 | 2016-03-09 | 苏州市启扬商贸有限公司 | Tripod compass |
| CN111452543A (en) * | 2020-04-13 | 2020-07-28 | 湖州禾辞电子商务有限公司 | Anti-deviation learning compasses based on worm gear transmission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |