CN202623700U - Teaching compasses - Google Patents
Teaching compasses Download PDFInfo
- Publication number
- CN202623700U CN202623700U CN 201220314477 CN201220314477U CN202623700U CN 202623700 U CN202623700 U CN 202623700U CN 201220314477 CN201220314477 CN 201220314477 CN 201220314477 U CN201220314477 U CN 201220314477U CN 202623700 U CN202623700 U CN 202623700U
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- CN
- China
- Prior art keywords
- teaching
- compasses
- gland
- bar
- universal joint
- 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 teaching compasses, and relates to a teaching aid for a university mathematics teacher. The tip of the lower end of a fixed rod of the compasses is easily fixed on a teaching blackboard made of glass, so that teaching can be normally carried out, and the radius value of a circle drawn by using the compasses can be clear. The fixed rod is hinged with the upper end of a movable rod through a pin shaft, a universal joint ball head is arranged at the lower end of the fixed rod, a gland is provided with a circular hole, the universal joint ball head is arranged in the circular hole of the gland and limited through the gland, the gland is connected with a connecting seat, the lower end of the connecting seat is provided with a central inner cavity, the central inner cavity of the connecting seat is sleeved on a sucking disc seat of the sucking disc in a sliding mode, a central hole is formed in the middle of the lower surface of the sucking disc seat, a shaft sleeve is arranged in the central hole, a baffle ring is arranged at the lower end of the shaft sleeve, a circular pin handle is arranged at the upper end of a centering pin, the circular pin handle is arranged in the shaft sleeve and limited through the baffle ring, a spring is arranged in the shaft sleeve, and one end of an arc-shaped ruler is connected with the fixed rod. The teaching compasses are used in university mathematics class and provide convenience for teaching.
Description
Technical field
The utility model relates to the teaching aid that a kind of university math teacher uses, particularly a kind of compasses for teaching.
Background technology
At present, there is following problems in the compasses that in College Mathematics Teaching, use: one, compasses are decided the tip of bar lower end and the blackboard for education of glass material is difficult to fix, and have influenced normally carrying out of teaching; Two, compasses are done radius of a circle numerical value and can not be come into plain view.
Summary of the invention
The purpose of the utility model provides a kind of compasses for teaching, and these compasses are decided the tip of bar lower end and the blackboard for education easy fixation of glass material, and teaching is normally carried out, and compasses are done radius of a circle numerical value and can be come into plain view.
Realize above-mentioned purpose, the technical scheme that the utility model is taked is:
A kind of compasses for teaching, said compasses comprise decides bar and moving bar, and the upper end of deciding bar and moving bar is hinged through bearing pin; The lower end of deciding bar is equipped with the universal joint bulb, and gland is provided with circular hole, and the universal joint bulb is installed in the circular hole of gland; The universal joint bulb is spacing through gland, and gland links to each other with Connection Block, and the lower end of Connection Block is provided with central lumen; The central lumen slip cap of Connection Block is contained on the sucker disk seat of sucker, and the lower surface of sucker disk seat middle part is provided with centre bore, and axle sleeve is installed in the centre bore; The lower end of axle sleeve is provided with baffle ring, and the upper end of centering pin is provided with circular needle handle, and circular needle handle is arranged in the axle sleeve; Circular needle handle is spacing through baffle ring, and spring is housed in the axle sleeve, an end of arc chi with decide bar and link to each other.
The said outer surface of deciding bar and moving bar is equipped with anti-skidding line.
The utility model with respect to the beneficial effect of prior art is: the utility model is slightly firmly depressed the sucker of compasses in teaching owing to sucker is installed deciding the bar lower end, can sucker be adsorbed on the blackboard for education of glass material, and convenient fixing is firm; The radius of circle numerical value that the arc slide calliper rule of deciding bar can make compasses make comes into plain view; Moving bar is provided with anti-skidding line with the outer surface of deciding bar, is beneficial to hand-held compasses, improves the stability when using.
Description of drawings
Fig. 1 is the vertical view of a kind of compasses for teaching of the utility model.
Wherein, decide bar 1, moving bar 2, bearing pin 3, universal joint bulb 4, gland 5, Connection Block 6, sucker 7, sucker disk seat 8, axle sleeve 9, baffle ring 10, centering pin 11, circular needle handle 12, spring 13, arc chi 14, anti-skidding line 15.
The specific embodiment
As shown in Figure 1, a kind of compasses for teaching, said compasses comprise decides bar 1 and moving bar 2, and it is hinged through bearing pin 3 with the upper end of moving bar 2 to decide bar 1; The lower end of deciding bar 1 is equipped with universal joint bulb 4, and gland 5 is provided with circular hole, and universal joint bulb 4 is installed in the circular hole of gland 5; Universal joint bulb 4 is spacing through gland 5, and gland 5 and Connection Block 6 link to each other through connecting bolt, and the lower end of Connection Block 6 is provided with central lumen; The central lumen slip cap of Connection Block 6 is contained on the sucker disk seat 8 of sucker 7, and the lower surface of sucker disk seat 8 middle part is provided with centre bore, and axle sleeve 9 is installed in the centre bore; The lower end of axle sleeve 9 is provided with baffle ring 10, and the upper end of centering pin 11 is provided with circular needle handle 12, and circular needle handle 12 is arranged in the axle sleeve 9; Circular needle handle 12 is spacing through baffle ring 10, and spring 13 is housed in the axle sleeve 9, an end of arc chi 14 with decide bar 1 and link to each other; The said outer surface of deciding bar 1 and moving bar 2 is equipped with anti-skidding line 15.
Claims (2)
1. compasses for teaching, said compasses comprise decides bar (1) and moving bar (2), and decide bar (1) and the upper end of moving bar (2), to pass through bearing pin (3) hinged; It is characterized in that: the lower end of deciding bar (1) is equipped with universal joint bulb (4), and gland (5) is provided with circular hole, and universal joint bulb (4) is installed in the circular hole of gland (5); Universal joint bulb (4) is spacing through gland (5), and gland (5) links to each other with Connection Block (6), and the lower end of Connection Block (6) is provided with central lumen; The central lumen slip cap of Connection Block (6) is contained on the sucker disk seat (8) of sucker (7), and the lower surface of sucker disk seat (8) middle part is provided with centre bore, and axle sleeve (9) is installed in the centre bore; The lower end of axle sleeve (9) is provided with baffle ring (10); The upper end of centering pin (11) is provided with circular needle handle (12), and circular needle handle (12) is arranged in the axle sleeve (9), and circular needle handle (12) is spacing through baffle ring (10); Spring (13) is housed in the axle sleeve (9), an end of arc chi (14) with decide bar (1) and link to each other.
2. a kind of according to claim 1 compasses for teaching is characterized in that: the said outer surface of deciding bar (1) and moving bar (2) is equipped with anti-skidding line (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314477 CN202623700U (en) | 2012-07-02 | 2012-07-02 | Teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314477 CN202623700U (en) | 2012-07-02 | 2012-07-02 | Teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202623700U true CN202623700U (en) | 2012-12-26 |
Family
ID=47376930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220314477 Expired - Fee Related CN202623700U (en) | 2012-07-02 | 2012-07-02 | Teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202623700U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103637451A (en) * | 2013-11-21 | 2014-03-19 | 大连大学 | Multifunctional measuring scale for tailoring |
| CN104002592A (en) * | 2014-05-22 | 2014-08-27 | 张泽奎 | Novel multifunctional compasses |
| CN109130626A (en) * | 2018-10-26 | 2019-01-04 | 刘小亮 | A kind of teaching compass ruler |
| CN112109477A (en) * | 2020-09-23 | 2020-12-22 | 郑州铁路职业技术学院 | Mathematics teaching auxiliary device |
-
2012
- 2012-07-02 CN CN 201220314477 patent/CN202623700U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103637451A (en) * | 2013-11-21 | 2014-03-19 | 大连大学 | Multifunctional measuring scale for tailoring |
| CN104002592A (en) * | 2014-05-22 | 2014-08-27 | 张泽奎 | Novel multifunctional compasses |
| CN109130626A (en) * | 2018-10-26 | 2019-01-04 | 刘小亮 | A kind of teaching compass ruler |
| CN111251755A (en) * | 2018-10-26 | 2020-06-09 | 刘小亮 | Teaching compass ruler and use method thereof |
| CN112109477A (en) * | 2020-09-23 | 2020-12-22 | 郑州铁路职业技术学院 | Mathematics teaching auxiliary 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: 20121226 Termination date: 20150702 |
|
| EXPY | Termination of patent right or utility model |