CN204977967U - Teaching compasses - Google Patents
Teaching compasses Download PDFInfo
- Publication number
- CN204977967U CN204977967U CN201520775473.9U CN201520775473U CN204977967U CN 204977967 U CN204977967 U CN 204977967U CN 201520775473 U CN201520775473 U CN 201520775473U CN 204977967 U CN204977967 U CN 204977967U
- Authority
- CN
- China
- Prior art keywords
- movable sleeve
- pole
- fixed
- lower extreme
- spring
- 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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- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
Teaching compasses, including the radius chi, articulated fixed branch together in upper end and rotation branch, the lower extreme of fixed branch is provided with positioning mechanism, positioning mechanism includes the fixed axle, the universal joint, fixing base and magnet, the lower extreme of fixed branch is equipped with the axial installation hole, fixed cartridge in the axial installation hole in fixed axle upper end, fixed axle lower extreme tip passes through universal joint and fixing base swing joint, magnet is fixed in the bottom of fixing base, the lower extreme that rotates branch is equipped with chalk installation mechanism, chalk installation mechanism includes the collet, movable sleeve and spring, the body of collet for being equipped with the central through hole, the body upper end is fixed in and is rotated branch lower extreme tip, the tip is equipped with the annular arch of radial evagination under the body, a plurality of slot of circumference equipartition are followed to the tip under the body, spring and movable sleeve are from last to the suit is outside in the body in proper order down, make the both ends of spring support by the lower tip in rotating branch and the upper end terminal surface of movable sleeve respectively, the lower extreme of movable sleeve supports the annular arch of leaning on in the body lower extreme.
Description
Technical field
The utility model belongs to teaching aid field, especially relevant with a kind of educational compasses.
Background technology
Compasses are one of apparatus that Students ' Learning or teachers ' teaching are conventional.The compasses of traditional teaching are relatively simple for structure, comprise upper end thereof fixing pole together and rotate pole, arranging pilot pin in the lower end of fixing pole, arrange the pen container for placing chalk in the lower end of rotating pole.During use, pinprick will be located as fixed point on blackboard, and rotate the pole angle of opening with hand adjustment joint and determine required size of drawing circle or circular arc, can picture circle or circular arc.But there are problems when using on existing blackboard in the educational compasses of this structure: the material having glass etc. to have magnetic thing due to existing blackboard is made more, not only hard but also sliding, fixing pole being difficult to of conventional teaching compasses is fixed on blackboard locates, and the pen container design of rotating the upper fixing chalk of pole is unreasonable, chalk frangibility, to fracture or the chalk end be finished in rear pen container not easily takes out, have one section of longer chalk not use in pen container, cause waste.
Utility model content
The purpose of this utility model is intended to overcome existing educational compasses and there is above-mentioned defect, provides the educational compasses that a kind of structure is simple, cost is lower, location is convenient firmly, chalk is not wasted.
For this reason, the utility model is by the following technical solutions: educational compasses, comprise fixing pole, rotate pole and radius ruler, it is characterized in that, the upper end of described fixing pole and the upper end of rotation pole are hinged and are undertaken locking or unclamping by a locker, the lower end of described fixing pole is provided with detent mechanism, described detent mechanism comprises fixed axis, universal joint, holder and magnet, the lower end of described fixing pole is provided with axial installing hole, fixed axis upper end is fixedly plugged in described axial installing hole, described fixed axis lower end is flexibly connected with described holder by described universal joint, described magnet is fixedly connected on the bottom of described holder, the lower end of described rotation pole is provided with chalk installing mechanism, chalk installing mechanism comprises collet, movable sleeve and spring, described collet is the body being provided with central through hole, body upper end is fixedly connected on the lower end of described rotation pole, the periphery of body bottom is provided with the cambered outwards annular protrusion in footpath, end portion along the circumferential direction equally distributed multiple slot of body, facilitate plug-in mounting chalk, body lower end is made to have elasticity, it is outside that described spring and movable sleeve are set in described body from top to bottom successively, the two ends of spring are made to be resisted against the described rotation bottom of pole and the upper end end face of movable sleeve respectively, the lower end of movable sleeve under the action of the spring resilient abutment in the annular protrusion of described body lower end, and make movable sleeve be positioned at the slot outer ring of described body end portion, clamping action is played to the chalk that body lower end is inserted in slot.
During use, required radius of a circle is regulated by radius ruler, the angle of fixing pole and rotation pole is fixed, then by the magnet adsorption of fixing pole lower end on blackboard, by rotating the rotation of pole, circle can be drawn, after chalk uses a period of time, movable sleeve is up pushed away, the clamping force of the body lower end of collet is disappeared, chalk can move axially, chalk is pulled out a segment distance, unclamp movable sleeve, under the action of the spring, movable sleeve is made to be positioned at outside the slot of described body end portion, to the chalk be inserted in body lower end, there is the effect of being fixedly clamped.
The utility model can reach following beneficial effect: by arranging the magnetic detent mechanism of tool in the lower end of the fixing pole of educational compasses, make accurate positioning firm, by arranging the collet that can regulate chalk length and by the elastic clamping of spring and movable sleeve, improve the clamping firmness of chalk, and do not waste chalk, handling chalk is convenient; Overall structure is simple, and swift and convenient to operate, service efficiency is high.
Accompanying drawing explanation
Fig. 1 is exploded perspective view of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.
As shown in Figure 1, the utility model comprises fixing pole 5, rotate pole 8 and radius ruler 9, the upper end of described fixing pole 5 and the upper end of rotation pole 8 are hinged and are undertaken locking or unclamping by a locker 7, described radius ruler 9 one end is flexibly connected with described middle part of rotating pole 8, the middle part of described fixing pole 5 is provided with a cross-perforating 6, during use, radius ruler 9 other end carries out size adjustment through cross-perforating 6, the lower end of described fixing pole 5 is provided with detent mechanism, described detent mechanism comprises fixed axis 3, universal joint 2, holder and magnet 1, the lower end of described fixing pole 5 is provided with axial installing hole 4, fixed axis 3 upper end is fixedly plugged in described axial installing hole 4, described fixed axis 3 lower end is flexibly connected with described holder by described universal joint 2, described magnet 1 is fixedly connected on the bottom of described holder, the lower end of described rotation pole 8 is provided with chalk installing mechanism, chalk installing mechanism comprises collet, movable sleeve 11 and spring 10, described collet is the body 12 being provided with central through hole, body 12 upper end is fixedly connected on the lower end of described rotation pole 8, the periphery of body 12 bottom is provided with the cambered outwards annular protrusion 13 in footpath, end portion along the circumferential direction equally distributed multiple slot of body 12, facilitate plug-in mounting chalk, body 12 lower end is made to have elasticity, it is outside that described spring 10 and movable sleeve 11 are set in described body 12 from top to bottom successively, the two ends of spring 10 are made to be resisted against the described rotation bottom of pole 8 and the upper end end face of movable sleeve 11 respectively, the lower end of movable sleeve 11 under the effect of spring 10 resilient abutment in the annular protrusion 13 of described body 12 lower end, and make movable sleeve 11 be positioned at the slot outer ring of described body 12 end portion, clamping action is played to the chalk that body 12 lower end is inserted in slot, the upper end of described fixing pole 5 is provided with a hanging hole, when not in use, can be mounted on and a hanger on the wall, convenient for collecting.
During use, required radius of a circle is regulated by radius ruler 9, the angle of fixing pole 5 and rotation pole 8 is fixed, then the magnet 1 of fixing pole 5 lower end is adsorbed on blackboard, by rotating the rotation of pole 8, circle can be drawn, after chalk uses a period of time, movable sleeve 11 is up pushed away, the clamping force of body 12 lower end of collet is disappeared, chalk can move axially, chalk is pulled out a segment distance, unclamp movable sleeve 11, under the effect of spring 10, movable sleeve 11 is made to be positioned at outside the slot of described body 12 end portion, to the chalk be inserted in slot, there is the effect of being fixedly clamped.
Claims (1)
1. educational compasses, comprise fixing pole, rotate pole and radius ruler, it is characterized in that: the upper end of described fixing pole and the upper end of rotation pole are hinged and are undertaken locking or unclamping by a locker, the lower end of described fixing pole is provided with detent mechanism, described detent mechanism comprises fixed axis, universal joint, holder and magnet, the lower end of described fixing pole is provided with axial installing hole, fixed axis upper end is fixedly plugged in described axial installing hole, described fixed axis lower end is flexibly connected with described holder by described universal joint, described magnet is fixedly connected on the bottom of described holder, the lower end of described rotation pole is provided with chalk installing mechanism, chalk installing mechanism comprises collet, movable sleeve and spring, described collet is the body being provided with central through hole, body upper end is fixedly connected on the lower end of described rotation pole, the periphery of body bottom is provided with the cambered outwards annular protrusion in footpath, end portion along the circumferential direction equally distributed multiple slot of body, it is outside that described spring and movable sleeve are set in described body from top to bottom successively, the two ends of spring are made to be resisted against the described rotation bottom of pole and the upper end end face of movable sleeve respectively, the lower end of movable sleeve under the action of the spring resilient abutment in the annular protrusion of described body lower end, and make movable sleeve be positioned at the slot outer ring of described body end portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775473.9U CN204977967U (en) | 2015-10-08 | 2015-10-08 | Teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775473.9U CN204977967U (en) | 2015-10-08 | 2015-10-08 | Teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204977967U true CN204977967U (en) | 2016-01-20 |
Family
ID=55112374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520775473.9U Expired - Fee Related CN204977967U (en) | 2015-10-08 | 2015-10-08 | Teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204977967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584935A (en) * | 2017-08-31 | 2018-01-16 | 中山诺顿科研技术服务有限公司 | It is a kind of provided with the educational compasses being convenient for measuring |
-
2015
- 2015-10-08 CN CN201520775473.9U patent/CN204977967U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584935A (en) * | 2017-08-31 | 2018-01-16 | 中山诺顿科研技术服务有限公司 | It is a kind of provided with the educational compasses being convenient for measuring |
| CN107584935B (en) * | 2017-08-31 | 2019-04-26 | 中山诺顿科研技术服务有限公司 | It is a kind of equipped with the educational compasses being convenient for measuring |
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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: 20160120 Termination date: 20171008 |