CN202413147U - Chalk compass - Google Patents
Chalk compass Download PDFInfo
- Publication number
- CN202413147U CN202413147U CN2011205419935U CN201120541993U CN202413147U CN 202413147 U CN202413147 U CN 202413147U CN 2011205419935 U CN2011205419935 U CN 2011205419935U CN 201120541993 U CN201120541993 U CN 201120541993U CN 202413147 U CN202413147 U CN 202413147U
- Authority
- CN
- China
- Prior art keywords
- chalk
- compass
- utility
- centering pin
- model
- 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 chalk compass which comprises a handle, a rotating arm and a positioning arm, wherein the handle, the rotating arm and the positioning arm are connected through a rotating shaft, the lower end of the rotating arm is fixedly connected with a chalk fixture, and the chalk fixture is in a rotatablely retractable lipstick structure form; and the lower end of the positioning arm is connected with a centering pin, and the centering pin is a permanent magnet. The chalk compass provided by the utility model is simple in structure, and low in cost; when the chalk compass is used, the chalk compass is installed conveniently and quickly, and the length of a chalk can be adjusted according to application needs; meanwhile, because the centering pin is a permanent magnet, when the chalk compass is used, the chalk compass has small possibility of sliding, thereby ensuring the quality of a drawn circle, and improving the teaching quality.
Description
Technical field
The utility model belongs to a kind of daily necessities, especially a kind of chalk compasses.
Background technology
At present, blackboard and chalk have become requisite requirement in the school, in teaching, hold an important position.But many metal blackboards have appearred in varied along with present blackboard, and it is more and more inconvenient on blackboard, to use traditional compasses to draw, and very easily slides, and is difficult to the circle of the standard of drawing, and has influenced Teaching Quality greatly.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of chalk compasses simple in structure, easy to use are provided.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of chalk compasses comprise handle, cursor and registration arm, and handle, cursor are connected through rotating shaft with registration arm, it is characterized in that: said cursor lower end is fixedly connected with the chalk anchor clamps, connects centering pin in the registration arm lower end.
And described centering pin is a permanent magnet.
The advantage and the good effect of the utility model are:
The utility model is simple in structure, with low cost, and when using the chalk compasses, easy for installation, quick, the length of chalk can be regulated according to the use needs; And centering pin is a permanent magnet, makes when using the chalk compasses, is difficult for producing slip, thereby has guaranteed the quality of drawn circle, has improved Teaching Quality.
Description of drawings
Fig. 1 is the profile front view of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model embodiment is done further detailed description, following embodiment is illustrative, is not determinate, can not limit the protection domain of the utility model with following embodiment.
A kind of chalk compasses comprise handle 1, cursor 3 and registration arm 4, and handle, cursor are connected through rotating shaft 2 with registration arm, and said cursor lower end is fixedly connected with chalk anchor clamps 5, and said chalk anchor clamps have the version of the rotatable lipstick that stretches; Connect centering pin 6 in the registration arm lower end, centering pin is a permanent magnet.
The utility model is simple in structure, with low cost, and when using the chalk compasses, easy for installation, quick, the length of chalk can be regulated according to the use needs; And centering pin is a permanent magnet, makes when using the chalk compasses, is difficult for producing slip, thereby has guaranteed the quality of drawn circle, has improved Teaching Quality.
The described embodiment of the utility model is illustrative; Rather than it is determinate; Therefore the utility model is not limited to the embodiment described in the specific embodiment; Every by those skilled in the art according to other embodiments that the technical scheme of the utility model draws, belong to the scope of the utility model protection equally.
Claims (2)
1. chalk compasses comprise handle, cursor and registration arm, and handle, cursor are connected through rotating shaft with registration arm, it is characterized in that: said cursor lower end is fixedly connected with the chalk anchor clamps, connects centering pin in the registration arm lower end.
2. chalk compasses according to claim 1 is characterized in that: described centering pin is a permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205419935U CN202413147U (en) | 2011-12-22 | 2011-12-22 | Chalk compass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205419935U CN202413147U (en) | 2011-12-22 | 2011-12-22 | Chalk compass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202413147U true CN202413147U (en) | 2012-09-05 |
Family
ID=46737935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205419935U Expired - Fee Related CN202413147U (en) | 2011-12-22 | 2011-12-22 | Chalk compass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202413147U (en) |
-
2011
- 2011-12-22 CN CN2011205419935U patent/CN202413147U/en not_active Expired - Fee Related
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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: 20120905 Termination date: 20121222 |