CN201633391U - Teaching compass convenient for drawing - Google Patents
Teaching compass convenient for drawing Download PDFInfo
- Publication number
- CN201633391U CN201633391U CN2009202294856U CN200920229485U CN201633391U CN 201633391 U CN201633391 U CN 201633391U CN 2009202294856 U CN2009202294856 U CN 2009202294856U CN 200920229485 U CN200920229485 U CN 200920229485U CN 201633391 U CN201633391 U CN 201633391U
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- CN
- China
- Prior art keywords
- fixed
- cavity
- leg
- compass
- convenient
- 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)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
Abstract
A teaching compass convenient for drawing comprises a fixed compass leg (1) and a rotary compass leg (2) which are connected via a rotary shaft (3). A chalk fixing sleeve (11) is arranged at the lower end of the rotary compass leg (2). The teaching compass is characterized in that a cavity (9) of 3-4cm is arranged at the lower end of the fixed compass leg (1), a chute (5) is arranged on the cavity (9), a fixed needle (4) provided with a fixed seat (6) is arranged inside the cavity (9), a protruding slider (7) is arranged outside the fixed seat (6) and embedded into the chute (5), and a rubber sucker (8) is further arranged at the lower end of the fixed compass leg (1) and covered outside the fixed needle (4). The teaching compass has the advantages of simple structure, convenient, accurate and labor-saving drawing and high safety factor due to the fact that the telescopic fixed needle can be retracted after a circle center is fixed for drawing and damage on a blackboard and injury of people can be avoided.
Description
Technical field
The utility model relates to educational aid, specifically is a kind of convenient educational compasses of drawing.
Background technology
The present employed compasses of teacher, all be one iron pin to be installed at the front end of fixed gauge leg, when the blackboard upper drawing circle, be fixed on a point, exert oneself the excessive next hole point that will stay along with access times increase on blackboard, will stay a lot of points on blackboard, the chalk dust in the point of hole is difficult to wipe, influence the definition that teacher writes, also can influence the attractive in appearance of blackboard; If firmly too small, can not well fix, compasses skidded when rotation was drawn, and caused the inconvenience of drawing.People design a kind of compasses with sucker at present, change locking pin into sucker exactly, though solved fixing trouble, because sucker is not a point, are difficult to determine the center of circle, also can influence drawing quality.
Summary of the invention
It is convenient, accurate that the purpose of this utility model provides a kind of drawing, and can not cause the educational compasses of damage to blackboard.
Described convenient educational compasses of drawing, be formed by connecting by rotating shaft by fixed gauge leg and rotation rule leg, the lower end of rotation rule leg is provided with the chalk fixed cover, it is characterized in that: fixed gauge leg lower end has the cavity of 3-4cm, has chute on the face of chamber, is provided with the locking pin of a band holder in the cavity, the outside of holder is provided with the slide block of projection, slide block embeds in the chute, also is provided with a rubber suction cups in the lower end of fixed gauge leg, and rubber suction cups covers on outside the locking pin.
On the fixed gauge leg, be with a rubber sleeve that is used for fixing slide block.
The utility model is simple in structure, and it is convenient, accurate, laborsaving to draw, and locking pin can stretch, and with its pinch in, and can not cause damage to blackboard after drawing bowlder to fix the center of circle, also can prevent to hurt sb.'s feelings, and safety coefficient is higher.
Description of drawings
Fig. 1 is a structural representation of the present utility model,
Fig. 2 is needle point and the structural representation of advising the leg coupling part.
Among the figure: 1-fixed gauge leg, 2-rotation rule leg, 3-rotating shaft, 4-locking pin, 5-chute, 6-holder, 7-slide block, 8-rubber suction cups, 9-cavity, 10-rubber sleeve, 11-chalk fixed cover.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.Among Fig. 1,2, described a kind of convenient educational compasses of drawing, be formed by connecting by rotating shaft 3 by fixed gauge leg 1 and rotation rule leg 2, the lower end of rotation rule leg 2 is provided with chalk fixed cover 11 and it is characterized in that: fixed gauge leg 1 lower end has the cavity 9 of 3-4cm, have chute 5 on the cavity 9, be provided with the locking pin 4 of a band holder 6 in the cavity 9, the outside of holder 6 is provided with the slide block 7 of projection, slide block 7 embeds in the chute 5, also be provided with a rubber suction cups 8 in the lower end of fixed gauge leg 1, rubber suction cups 8 covers on outside the locking pin 4.
On fixed gauge leg 1, be with a rubber sleeve 10 that is used for fixing slide block 7.
During drawing, can want locking pin 4 is skidded off by slide block, it is stretched out outside the rubber suction cups 8, find out centre point on blackboard, be fixed on this position then locking pin 4 is slowly slided in the cavity 9, inhale on blackboard with rubber suction cups 8, fixedly picture is justified.Also locking pin 4 can be retracted in the cavity 9 at ordinary times, avoid needle point to hurt the people, cause security incident.
Claims (2)
1. one kind makes things convenient for the educational compasses of drawing, be formed by connecting by rotating shaft (3) by fixed gauge leg (1) and rotation rule legs (2), the lower end of rotation rule legs (2) is provided with chalk fixed cover (11) and it is characterized in that: fixed gauge leg (1) lower end has the cavity (9) of 3-4cm, have chute (5) on the cavity (9), be provided with the locking pin (4) of a band holder (6) in the cavity (9), the outside of holder (6) is provided with the slide block (7) of projection, slide block (7) embeds in the chute (5), also be provided with a rubber suction cups (8) in the lower end of fixed gauge leg (1), rubber suction cups (8) covers on outside the locking pin (4).
2. convenient educational compasses of drawing according to claim 1 is characterized in that: be with a rubber sleeve (10) that is used for fixing slide block (7) on the cylindrical of fixed gauge leg (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202294856U CN201633391U (en) | 2009-11-05 | 2009-11-05 | Teaching compass convenient for drawing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202294856U CN201633391U (en) | 2009-11-05 | 2009-11-05 | Teaching compass convenient for drawing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201633391U true CN201633391U (en) | 2010-11-17 |
Family
ID=43077872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202294856U Expired - Fee Related CN201633391U (en) | 2009-11-05 | 2009-11-05 | Teaching compass convenient for drawing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201633391U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529526A (en) * | 2012-03-17 | 2012-07-04 | 孙友方 | Anti-slip and energy-saving teaching compass |
| CN102910005A (en) * | 2012-10-26 | 2013-02-06 | 华侨大学 | Compasses applicable to any smooth surface |
| CN103317908A (en) * | 2013-06-25 | 2013-09-25 | 吴江市德佐日用化学品有限公司 | Multifunctional safety compasses |
| CN105522854A (en) * | 2016-01-25 | 2016-04-27 | 信阳农林学院 | Teaching bow compass with length-variable support leg |
| CN105730092A (en) * | 2016-01-25 | 2016-07-06 | 信阳农林学院 | Teaching bow compass with sucker |
-
2009
- 2009-11-05 CN CN2009202294856U patent/CN201633391U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529526A (en) * | 2012-03-17 | 2012-07-04 | 孙友方 | Anti-slip and energy-saving teaching compass |
| CN102529526B (en) * | 2012-03-17 | 2014-11-12 | 孙友方 | Anti-slip and energy-saving teaching compass |
| CN102910005A (en) * | 2012-10-26 | 2013-02-06 | 华侨大学 | Compasses applicable to any smooth surface |
| CN102910005B (en) * | 2012-10-26 | 2016-08-03 | 华侨大学 | A kind of compasses that can use on any smooth surface |
| CN103317908A (en) * | 2013-06-25 | 2013-09-25 | 吴江市德佐日用化学品有限公司 | Multifunctional safety compasses |
| CN105522854A (en) * | 2016-01-25 | 2016-04-27 | 信阳农林学院 | Teaching bow compass with length-variable support leg |
| CN105730092A (en) * | 2016-01-25 | 2016-07-06 | 信阳农林学院 | Teaching bow compass with sucker |
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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: 20101117 Termination date: 20111105 |