CN104325818A - Circle describing instrument for blackboard - Google Patents
Circle describing instrument for blackboard Download PDFInfo
- Publication number
- CN104325818A CN104325818A CN201410573984.2A CN201410573984A CN104325818A CN 104325818 A CN104325818 A CN 104325818A CN 201410573984 A CN201410573984 A CN 201410573984A CN 104325818 A CN104325818 A CN 104325818A
- Authority
- CN
- China
- Prior art keywords
- blackboard
- circle
- lifting bolt
- tape measure
- instrument
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L9/00—Circular curve-drawing or like instruments
Abstract
The invention discloses a circle describing instrument for a blackboard. The circle describing instrument for the blackboard comprises an adsorption plant and a tape; the adsorption plant comprises a support frame; the bottom end of the support frame is provided with a sucker; the upper part of the support frame is in threaded connection with a lifting bolt; the lifting bolt is provided with a lantern ring; the other end of the lantern ring is connected with the tape. According to the structure of the circle describing instrument, the required radius can be conveniently selected, and circles can be conveniently described; the structure is simple in operation and lower in cost.
Description
Technical field
The present invention relates to a kind of tutor auxiliary platform instrument, specifically circle instrument drawn by a kind of blackboard.
Background technology
Teacher is in teaching process, and traditional compasses of use, often have a lot of inconvenient place, as a pin of the compasses in the center of circle, not only hard but also sharp often, blackboard is smoother also, and teacher is at picture bowlder, this pin very easily skids, and affect the effect of picture circle, the point of compasses also can damage blackboard.In addition, the time of compasses has been grown, and the screw fixing two compass legs is easily loose, draws bowlder and easily misplaces, also can affect round effect, draw bowlder radius of a circle also not easily accurate.And have not yet to see Related product and solve this difficult problem.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of blackboard to draw circle instrument, it is both non-slip, easy to operate, accurately can draw circle with radius.
For solving the problems of the technologies described above, circle instrument drawn by blackboard of the present invention, it is characterized in that it comprises adsorbent equipment, tape measure, described adsorbent equipment comprises bracing frame, bracing frame bottom is provided with sucker, and support frame as described above top is threaded with lifting bolt, and described lifting bolt is provided with the collar, this collar other end is connected with tape measure, and the end of this tape measure is provided with noose.
Adopt after such scheme, owing to being provided with sucker, and lifting bolt can the degree of tightness of manual adjustments sucker, can choose required radius with tape measure easily and draw circle easily.This structure operation is simple, and cost is also lower.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structural representation that circle instrument drawn by blackboard of the present invention.
Detailed description of the invention
As shown in Figure 1, circle instrument drawn by blackboard of the present invention, it is characterized in that it comprises adsorbent equipment, tape measure 5, described adsorbent equipment comprises bracing frame 2, bracing frame 2 bottom is provided with sucker 3, and support frame as described above 2 top is threaded with lifting bolt 1, and described lifting bolt 1 is provided with the collar 4, this collar 4 other end is connected with tape measure 5, and the end of this tape measure 5 is provided with noose 6.
The object of adsorbent equipment is to set up a stable center of circle, so that follow-up picture circle process.The lifting bolt 1 of adsorbent equipment is elevated on bracing frame 2, to reach the object holding out against sucker 3.
Adsorbent equipment in use, is first placed in blackboard plane by this structure, makes sucker 3 be attached in blackboard plane, then manual adjustments lifting bolt 1, makes it fastening and by the air emptying in sucker 3, and then sucker 3 is tightly adsorbed on blackboard.Then tape measure 5 is installed on lifting bolt 1 by the collar 4, needs picture bowlder, elongates tape measure 5 to appropriate length, entangles chalk with the noose 6 on it, such chalk just with lifting bolt 1 for center of circle rotary picture is justified, finally draw required circular pattern.
The adsorbent equipment related in this structure belongs to prior art, no longer describes in detail here.
Claims (1)
1. circle instrument drawn by a blackboard, it is characterized in that it comprises adsorbent equipment, tape measure (5), described adsorbent equipment comprises bracing frame (2), bracing frame (2) bottom is provided with sucker (3), support frame as described above (2) top is threaded with lifting bolt (1), described lifting bolt (1) is provided with the collar (4), and this collar (4) other end is connected with tape measure (5), and the end of this tape measure (5) is provided with noose (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573984.2A CN104325818A (en) | 2014-10-24 | 2014-10-24 | Circle describing instrument for blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573984.2A CN104325818A (en) | 2014-10-24 | 2014-10-24 | Circle describing instrument for blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104325818A true CN104325818A (en) | 2015-02-04 |
Family
ID=52400680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410573984.2A Pending CN104325818A (en) | 2014-10-24 | 2014-10-24 | Circle describing instrument for blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104325818A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1178373A (en) * | 1997-09-04 | 1999-03-23 | Kazuyoshi Umemoto | Compass |
| CN201070930Y (en) * | 2007-05-29 | 2008-06-11 | 熊尧 | Circular curve-drawing instrument for blackboard |
| CN201124681Y (en) * | 2007-12-18 | 2008-10-01 | 李丹 | Drawing apparatus |
| CN201124678Y (en) * | 2007-10-10 | 2008-10-01 | 王新鹏 | Convenient compasses |
| CN201141753Y (en) * | 2007-12-22 | 2008-10-29 | 王立玉 | Multifunctional band tape |
| CN203046628U (en) * | 2013-01-25 | 2013-07-10 | 梁维秀 | Box ruler type teaching divider |
| CN203557892U (en) * | 2013-10-31 | 2014-04-23 | 浙江工贸职业技术学院 | Teaching compass |
| CN203888467U (en) * | 2014-06-04 | 2014-10-22 | 浙江机电职业技术学院 | Portable circle-drawing tool for teaching |
-
2014
- 2014-10-24 CN CN201410573984.2A patent/CN104325818A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1178373A (en) * | 1997-09-04 | 1999-03-23 | Kazuyoshi Umemoto | Compass |
| CN201070930Y (en) * | 2007-05-29 | 2008-06-11 | 熊尧 | Circular curve-drawing instrument for blackboard |
| CN201124678Y (en) * | 2007-10-10 | 2008-10-01 | 王新鹏 | Convenient compasses |
| CN201124681Y (en) * | 2007-12-18 | 2008-10-01 | 李丹 | Drawing apparatus |
| CN201141753Y (en) * | 2007-12-22 | 2008-10-29 | 王立玉 | Multifunctional band tape |
| CN203046628U (en) * | 2013-01-25 | 2013-07-10 | 梁维秀 | Box ruler type teaching divider |
| CN203557892U (en) * | 2013-10-31 | 2014-04-23 | 浙江工贸职业技术学院 | Teaching compass |
| CN203888467U (en) * | 2014-06-04 | 2014-10-22 | 浙江机电职业技术学院 | Portable circle-drawing tool for teaching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150204 |