CN204296301U - Circular mapping teaching aid - Google Patents
Circular mapping teaching aid Download PDFInfo
- Publication number
- CN204296301U CN204296301U CN201420632541.1U CN201420632541U CN204296301U CN 204296301 U CN204296301 U CN 204296301U CN 201420632541 U CN201420632541 U CN 201420632541U CN 204296301 U CN204296301 U CN 204296301U
- Authority
- CN
- China
- Prior art keywords
- teaching aid
- sucker
- positioning strip
- bearing
- fixed
- 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
Links
Landscapes
- Toys (AREA)
Abstract
The utility model discloses a kind of circular mapping teaching aid, relate to teaching aid technical field, especially a kind of teaching aid drawing circle.It comprises sucker, bearing; The upper end of sucker is rotatably connected to fixed pulley; Lock ring is socketed with in the race of fixed pulley; Lock ring is connected with positioning strip; The other end of positioning strip is walked around fixed pull ring doubling and is connected by tape; Fixed pull ring is fixedly connected with the lateral wall of bearing.The beneficial effects of the utility model are easy to use, simple to operate, time saving and energy saving, the circle rule drawn.
Description
Technical field
The utility model relates to teaching aid technical field, especially a kind of teaching aid drawing circle.
Background technology
In the teaching process of junior high school, teacher draws positive round often through the experience of self on clipboard, but the positive Circular test irregularity drawn, rough.When adopting compasses, because the material of clipboard is comparatively hard, the leg tip of compasses can not be pricked in clipboard, so when picture bowlder often offsets owing to fixing not firm, this just needs to wipe the partial traces drawn, and again draws circle.In addition, two legs of compasses make it have certain altitude perpendicular to clipboard direction, so just need picture bowlder, ensure that the plane at two leg places is vertical with clipboard, waste time and energy.Moreover, two legs of traditional compasses often by bolt tightening, when press downwards larger time, often cause the angle of two supporting legs to change.
Utility model content
Technical problem to be solved in the utility model is the technical deficiency for above-mentioned existence, provides a kind of circular mapping teaching aid, easy to use, simple to operate, time saving and energy saving, the circle rule drawn.
The technical solution adopted in the utility model is: provide circular mapping teaching aid, comprise sucker, bearing; The upper end of sucker is rotatably connected to fixed pulley; Lock ring is socketed with in the race of fixed pulley; Lock ring is connected with positioning strip; The other end of positioning strip is walked around fixed pull ring doubling and is connected by tape; Fixed pull ring is fixedly connected with the lateral wall of bearing.
Further optimization the technical program, the medial surface top of the sucker of circular mapping teaching aid is fixed with magnet.
Further optimization the technical program, the positioning strip of circular mapping teaching aid is evenly distributed with graduation mark in the longitudinal direction.
Different from traditional compasses structure, the beneficial effects of the utility model are:
1, the axis of fixed pulley is as the center of circle of drawn circle, by sucker fixed pulley is fixedly adsorbed on clipboard that (on market, the rear portion, plate face of existing clipboard is mostly provided with irony gripper shoe, so magnet can be adsorbed onto on clipboard, the absorption affinity of further reinforcement sucker and clipboard), after sucker and clipboard adsorb, the power of the horizontal direction that can bear is large, fixed, can not offset.Be placed in by chalk in the dead eye of bearing, clipboard slides around fixed pulley can draw regular circle in one week, and picture circular velocity is fast.
2, the length of positioning strip can be adjusted by doubling amount, and can preset circular radius by graduation mark, uses simple, easy to operate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is Fig. 1 upward view.
In figure, 1, sucker; 2, bearing; 3, fixed pulley; 4, lock ring; 5, positioning strip; 6, fixed pull ring; 7, medial surface; 8, magnet; 9, graduation mark; 10, dead eye.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1-2, circular mapping teaching aid, comprises sucker 1, bearing 2; The upper end of sucker 1 is rotatably connected to fixed pulley 3; Lock ring 4 is socketed with in the race of fixed pulley 3; Lock ring 4 is connected with positioning strip 5; The other end of positioning strip 5 is walked around fixed pull ring 6 doubling and is connected by tape; Fixed pull ring 6 is fixedly connected with the lateral wall of bearing 2; Medial surface 7 top of sucker 1 is fixed with magnet 8; Positioning strip 5 is evenly distributed with graduation mark 9 in the longitudinal direction.
During use, sucker 1 is pressed to clipboard face, make sucker 1 be adsorbed onto on clipboard, on market, the plate face degree of roughness of some clipboards is comparatively large, likely makes sucker 1 ineffective.But the rear portion, plate face of most of clipboard, is provided with irony stereotype plate on market, so sucker 1 can also be connected with clipboard face by magnet 8.
After sucker 1 fixes, according to the radius of a circle that will draw, positioning strip 5 measures Len req, connect after remainder doubling by tape.Internal diameter chalk being placed in dead eye 10(dead eye 10 is between 1cm-1.3cm, is greater than the maximum gauge of existing chalk on market) in, then strain positioning strip 5, rotate along fixed pulley 3.
Claims (3)
1. a circular mapping teaching aid, is characterized in that: comprise sucker (1), bearing (2); The upper end of sucker (1) is rotatably connected to fixed pulley (3); Lock ring (4) is socketed with in the race of fixed pulley (3); Lock ring (4) is connected with positioning strip (5); The other end of positioning strip (5) is walked around fixed pull ring (6) doubling and connects by tape; Fixed pull ring (6) is fixedly connected with the lateral wall of bearing (2).
2. circle mapping teaching aid according to claim 1, is characterized in that: medial surface (7) top of sucker (1) is fixed with magnet (8).
3., according to the circle mapping teaching aid of claim 2 gained, it is characterized in that: positioning strip (5) is evenly distributed with graduation mark (9) in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420632541.1U CN204296301U (en) | 2014-10-29 | 2014-10-29 | Circular mapping teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420632541.1U CN204296301U (en) | 2014-10-29 | 2014-10-29 | Circular mapping teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204296301U true CN204296301U (en) | 2015-04-29 |
Family
ID=53101876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420632541.1U Expired - Fee Related CN204296301U (en) | 2014-10-29 | 2014-10-29 | Circular mapping teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204296301U (en) |
-
2014
- 2014-10-29 CN CN201420632541.1U patent/CN204296301U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204296301U (en) | Circular mapping teaching aid | |
| CN203077267U (en) | Pipeline opposite opening scriber | |
| CN202319550U (en) | Compass for math teaching | |
| CN204701338U (en) | A kind of Portable blackboard special compasses | |
| CN204621409U (en) | A kind of location production line for organizing vertical machine | |
| CN204236096U (en) | Drawing Ellipse teaching aid | |
| CN202345177U (en) | Adjustable compass for mathematical teaching | |
| CN201220547Y (en) | Compass | |
| CN201619354U (en) | Attracted-disc cyclograph | |
| CN201619351U (en) | Novel cyclograph | |
| CN205185667U (en) | Antiskid drawing compass | |
| CN202163185U (en) | Multifunctional cyclograph | |
| CN202463321U (en) | Teaching equilateral triangular ruler | |
| CN204324510U (en) | A kind of drying baker outlet automatic deviation rectifying device | |
| CN204253639U (en) | A kind of automobile shafts bearing | |
| CN201816353U (en) | Compasses used on blackboard | |
| CN203078071U (en) | Chalk compasses | |
| CN202293914U (en) | Ruler device for mathematics teaching | |
| CN202703023U (en) | Single-rod compass for instruction | |
| CN205220164U (en) | Teaching compasses | |
| CN202896073U (en) | Angle ruler for mechanical drawing teaching | |
| CN202439432U (en) | Suction disc type teaching compasses | |
| CN202413134U (en) | Circle drawing machine for math teaching | |
| CN202345175U (en) | Suction cup type compass | |
| CN203110689U (en) | Compasses for teaching |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20171029 |