CN205255841U - End formula compasses are made to duplex for mathematical education - Google Patents
End formula compasses are made to duplex for mathematical education Download PDFInfo
- Publication number
- CN205255841U CN205255841U CN201521084072.5U CN201521084072U CN205255841U CN 205255841 U CN205255841 U CN 205255841U CN 201521084072 U CN201521084072 U CN 201521084072U CN 205255841 U CN205255841 U CN 205255841U
- Authority
- CN
- China
- Prior art keywords
- swingle
- support bar
- rotary rod
- screw rod
- mathematical education
- 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)
Abstract
The utility model discloses an end formula compasses are made to duplex for mathematical education, including articulated bracing piece, first rotary rod and the second rotary rod together in top, a fixed semicircular protractor frame on the bracing piece, be equipped with a round hole in the bottom face of bracing piece, a sliding fit round bar in this round hole has a sucking disc at the bottom of round bar fixed mounting, and the toper all is processed into to the bottom of first rotary rod and second rotary rod, the threaded section of tapering point periphery processing of first rotary rod and second rotary rod, in the screw thread section cover be equipped with with screw thread section complex swivel nut, cross -shaped groove has been seted up to the bottom of tapering point, recess fit in cartridge has a fixed head of installation chalk, the utility model discloses set up two sets of rotary rods and protractor frame and can realize depicing fast of sharp partition, circular arc partition, specific angle etc. Improved the speed of mapping, use for the student and also brought a lot of convenience.
Description
Technical field
The utility model relates to educational aid field, is specially two working ends formula compasses for a kind of mathematical education.
Background technology
Educational compasses is usually used in mathematical education, existing educational compasses generally comprises the hinged support bar in top and swingle, support bar is as central shaft, Rubber end is generally installed in order to location in its end, on swingle, generally fix the gland of an installation chalk, its weak point is, the locate mode less stable of Rubber end, affect the effect of picture circle thereby easily slide, simultaneously, gland is generally arranged on swingle end by eccentric mode, the less stable that it is connected with swingle, function in use also improve by more single needs.
Utility model content
The purpose of this utility model is to provide two working ends formula compasses for a kind of mathematical education, to solve the problem proposing in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
Two working ends formula compasses for a kind of mathematical education, comprise the hinged support bar in top, the first swingle and the second swingle, on support bar, fix a semicircular protractor frame, the middle part, straight base of protractor frame is fixed by a pin to the upper end of support bar, and the arc-shaped edges middle part of protractor frame is fixed by a pin to the middle part of support bar, in the bottom face of support bar, be provided with a circular hole, circular hole extends to the middle-end inside of support bar, a round bar is slidably matched in this circular hole, bottom at round bar is installed with sucker, taper is all processed in the bottom of the first swingle and the second swingle, the tapering point periphery of the first swingle and the second swingle is processed with thread segment, on thread segment, be arranged with the swivel nut coordinating with thread segment, the bottom of tapering point offers cross groove, in groove, coordinate and be fitted with the gland that chalk is installed, gland offers eccentric orfice, the other screwed hole that is communicated with eccentric orfice that offers of eccentric orfice, in screwed hole, be connected with screw rod, the outer end of screw rod is provided with nut, the inner of screw rod is provided with arc.
As further technical scheme of the utility model, the external diameter of described round bar is identical with the internal diameter of circular hole.
As further technical scheme of the utility model, arc is rotating to be arranged on screw rod.
Compared with prior art, when the utility model uses, chalk is arranged in eccentric orfice, screws screw rod, make arc compress chalk, the sucker of support bar is adsorbed on blackboard, rotation compasses, chalk can be at blackboard upper drawing circle, two groups of swingles and protractor frame is set and can realizes describing fast of straight line decile, circular arc decile, special angle etc., improve the speed of mapping, used and also brought a lot of convenience to student.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of mathematical education of the utility model two working ends formula compasses.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical scheme of this patent is described in more detail.
Refer to Fig. 1, two working ends formula compasses for a kind of mathematical education, comprise the hinged support bar in top 4, the first swingle 3 and the second swingle 5, on support bar 4, fix a semicircular protractor frame 2, the middle part, straight base of protractor frame 2 is fixed by a pin to the upper end of support bar 4, and the arc-shaped edges middle part of protractor frame 2 is fixed by a pin to the middle part of support bar 4, in the bottom face of support bar 4, be provided with a circular hole, circular hole extends to the middle-end inside of support bar 4, a round bar 6 is slidably matched in this circular hole, the external diameter of round bar 6 is identical with the internal diameter of circular hole, be installed with sucker 7 in the bottom of round bar 6, taper is all processed in the bottom of the first swingle 3 and the second swingle 5, the tapering point periphery of the first swingle 3 and the second swingle 5 is processed with thread segment, on thread segment, be arranged with the swivel nut 8 coordinating with thread segment, the bottom of tapering point offers cross groove 9, the interior cooperation of groove 9 is fitted with the gland 13 that chalk is installed, gland 13 offers eccentric orfice, the other screwed hole that is communicated with eccentric orfice that offers of eccentric orfice, in screwed hole, be connected with screw rod 11, the outer end of screw rod 11 is provided with nut 10, the inner of screw rod 11 is provided with arc 12, arc 12 is rotating to be arranged on screw rod 11.
When the utility model uses, chalk is arranged in eccentric orfice, screw screw rod 11, make arc 12 compress chalk, the sucker of support bar 47 is adsorbed on blackboard, rotation compasses, chalk can be at blackboard upper drawing circle, two groups of swingles and protractor frame are set and can realize describing fast of straight line decile, circular arc decile, special angle etc., improved the speed of mapping, use and also brought a lot of convenience to student.
Above the preferred embodiments of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, can also under the prerequisite that does not depart from this patent aim, makes various variations.
Claims (3)
1. two working ends formula compasses for mathematical education, is characterized in that, comprise the hinged support bar in top, the first swingle and the second swingle, on support bar, fix a semicircular protractor frame, the middle part, straight base of protractor frame is fixed by a pin to the upper end of support bar, and the arc-shaped edges middle part of protractor frame is fixed by a pin to the middle part of support bar, in the bottom face of support bar, be provided with a circular hole, circular hole extends to the middle-end inside of support bar, a round bar is slidably matched in this circular hole, bottom at round bar is installed with sucker, taper is all processed in the bottom of the first swingle and the second swingle, the tapering point periphery of the first swingle and the second swingle is processed with thread segment, on thread segment, be arranged with the swivel nut coordinating with thread segment, the bottom of tapering point offers cross groove, in groove, coordinate and be fitted with the gland that chalk is installed, gland offers eccentric orfice, the other screwed hole that is communicated with eccentric orfice that offers of eccentric orfice, in screwed hole, be connected with screw rod, the outer end of screw rod is provided with nut, the inner of screw rod is provided with arc.
2. two working ends formula compasses for a kind of mathematical education according to claim 1, is characterized in that, the external diameter of described round bar is identical with the internal diameter of circular hole.
3. two working ends formula compasses for a kind of mathematical education according to claim 1, is characterized in that, arc is rotating to be arranged on screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084072.5U CN205255841U (en) | 2015-12-23 | 2015-12-23 | End formula compasses are made to duplex for mathematical education |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084072.5U CN205255841U (en) | 2015-12-23 | 2015-12-23 | End formula compasses are made to duplex for mathematical education |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205255841U true CN205255841U (en) | 2016-05-25 |
Family
ID=55997389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521084072.5U Expired - Fee Related CN205255841U (en) | 2015-12-23 | 2015-12-23 | End formula compasses are made to duplex for mathematical education |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205255841U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108749415A (en) * | 2018-05-28 | 2018-11-06 | 喻正江 | A kind of novel high-precision compasses for teaching |
| CN113002221A (en) * | 2021-04-07 | 2021-06-22 | 虎思远 | Be applied to mathematics teaching of education and teaching with supplementary teaching device |
-
2015
- 2015-12-23 CN CN201521084072.5U patent/CN205255841U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108749415A (en) * | 2018-05-28 | 2018-11-06 | 喻正江 | A kind of novel high-precision compasses for teaching |
| CN113002221A (en) * | 2021-04-07 | 2021-06-22 | 虎思远 | Be applied to mathematics teaching of education and teaching with supplementary teaching device |
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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 |
Granted publication date: 20160525 Termination date: 20161223 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |