CN203511074U - Compasses for mathematics teaching - Google Patents
Compasses for mathematics teaching Download PDFInfo
- Publication number
- CN203511074U CN203511074U CN201320654592.XU CN201320654592U CN203511074U CN 203511074 U CN203511074 U CN 203511074U CN 201320654592 U CN201320654592 U CN 201320654592U CN 203511074 U CN203511074 U CN 203511074U
- Authority
- CN
- China
- Prior art keywords
- chi
- rotary base
- vernier
- clip
- spill spin
- 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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- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model relates to a teaching appliance, in particular to compasses for mathematics teaching. The compasses for mathematics teaching comprise a turn plate base, a rotating block, a rotary ruler and a vernier fixing button, wherein the rotating block is arranged on the turn plate base, the rotating block is connected with the turn plate base through a rotating shaft, a fixing ring is mounted at the upper end of the rotating shaft, the rotating shaft is hollow, an antiskid pad is disposed at the bottom of the turn plate base, centers of the turn plate base and the antiskid pad are hollow, the rotary ruler is arranged on the right side of the rotating block, the vernier fixing button is disposed on the rotary ruler, a buckle is disposed at the tail end of the rotary ruler, a chalk sliding groove is formed in the middle of the rotary ruler, a zero-degree pointer is mounted on the left side of the turn plate base, and angle scale values are designed on the turn plate base around the rotating block. The compasses for mathematics teaching have the advantages that using functions of the compasses are added, and the operation is simple and convenient.
Description
Technical field
The utility model relates to a kind of teaching aid, particularly a kind of compass for math teaching.
Background technology
At present, compasses of a great variety, but the calipers function that math teachers are used when teaching is more single, because of blackboard relatively level and smooth, the pointer of compasses and blackboard contact area are little, can not fix with blackboard, during operation, easily skid, compasses can not directly be determined and operate radius of a circle length cumbersome.
Utility model content
The utility model, in order to make up the defect of prior art, provides compass for math teaching a kind of simple in structure, easy to use.
The utility model is achieved by the following technical solution:
A kind of compass for math teaching, comprise rotary base, spill spin block, turn chi and vernier clip, on described rotary base, spill spin block is housed, spill spin block is connected by rotating shaft with rotary base, retainer ring is equipped with in rotating shaft upper end, described rotating shaft is hollow shape, slipmat is equipped with in rotary base bottom, rotary base and slipmat center are hollow shape, described spill spin block right side is equipped with and is turned chi, turn vernier clip is housed on chi, turn chi end buckle is housed, turn chi middle part chalk slide slot is housed, 0 degree pointer is equipped with in described rotary base left side, angle index value is housed on the rotary base of spill spin block surrounding.
Further, chalk holddown groove is equipped with in described vernier clip centre, and vernier clip one side is equipped with clamp nut, and axis scale is equipped with in both sides, vernier clip upper end.
Further, the chalk slide slot bilateral symmetry turning described on chi is equipped with length scale value.
Further, described spill spin block is equipped with benchmark pointer with the junction that turns chi.
Further, described rotary base and spill spin block are circular.
Further, the axis scale of both sides, described vernier clip upper end and benchmark pointer are turning on the axis of chi.
The beneficial effects of the utility model are: the contact area of rotary base and blackboard is large, slipmat can effectively avoid rotary base to skid, turn chi and vernier clip and can directly determine radius of a circle length, increased the use function of compasses, can and turn chi by rotary base angle is measured, easy and simple to handle.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is side view of the present utility model.
In figure, 1 rotary base, 2 spill spin blocks, 3 rotating shafts, 4 retainer rings, 5 slipmat, 60 degree pointers, 7 turn chi, 8 vernier clips, 9 chalk slide slots, 10 chalk holddown grooves, 11 clamp nuts, 12 benchmark pointers, 13 axis scales, 14 buckles, 15 angle index values, 16 length scale values.
The specific embodiment
Accompanying drawing 1 is a kind of specific embodiment of the present utility model.A kind of compass for math teaching of this utility model, comprise rotary base 1, spill spin block 2, turn chi 7 and vernier clip 8, on described rotary base 1, spill spin block 2 is housed, spill spin block 2 is connected by rotating shaft 3 with rotary base 1, retainer ring 4 is equipped with in rotating shaft 3 upper ends, described rotating shaft 3 is hollow shape, slipmat 5 is equipped with in rotary base 1 bottom, rotary base 1 is hollow shape with slipmat 5 centers, described spill spin block 2 right sides are equipped with and are turned chi 7, turn vernier clip 8 is housed on chi 7, turn chi 7 ends buckle 14 is housed, turn chi 7 middle parts chalk slide slot 9 is housed, 0 degree pointer 6 is equipped with in described rotary base 1 left side, on the rotary base 1 of spill spin block 2 surroundings, angle index value 15 is housed, chalk holddown groove 10 is equipped with in described vernier clip 8 centres, vernier clip 8 one sides are equipped with clamp nut 11, axis scale 13 is equipped with in vernier clip 8 both sides, upper end, described chalk slide slot 9 bilateral symmetry that turn on chi 7 are equipped with length scale value 16, described spill spin block 2 is equipped with benchmark pointer 12 with the junction that turns chi 7, described rotary base 1 and spill spin block 2 are circular, axis scale 13 and the benchmark pointer 12 of described vernier clip 8 both sides, upper end are turning on the axis of chi 7.A kind of compass for math teaching of this utility model, during use, chalk is placed in the chalk holddown groove 10 on vernier clip 8, the length of chalk should be greater than the distance turning between chi 7 and slipmat 5, a hand is placed on rotary base 1 on blackboard, an other hand turns chi 7 and carries out picture circle, by clamp nut 11, adjust vernier clip 8, according to the length scale value 16 turning on chi 7, adjust radius of a circle, while taking measurement of an angle, the center of circle of rotary base 1 is placed on to the summit of angle, whether the summit that can determine angle by hollow in rotating shaft 3 is on the center of circle of rotary base 1, on rotary base 10 degree pointer 6 is pointed to a limit of angle, by rotation, turn chi 7, when benchmark pointer 12 and axis scale 13 are overlapped with an other limit, angle index value 15 on the rotary base 1 that benchmark pointer 12 is pointed out is number of degrees of the angle of measurement.
The utility model is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection domain of the present utility model.
The technology that the utility model is not described in detail, shape, structure are partly known technology.
Claims (6)
1. a compass for math teaching, comprise rotary base (1), spill spin block (2), turn chi (7) and vernier clip (8), it is characterized in that: spill spin block (2) is housed on described rotary base (1), spill spin block (2) is connected by rotating shaft (3) with rotary base (1), retainer ring (4) is equipped with in rotating shaft (3) upper end, described rotating shaft (3) is hollow shape, slipmat (5) is equipped with in rotary base (1) bottom, rotary base (1) is hollow shape with slipmat (5) center, described spill spin block (2) right side is equipped with and is turned chi (7), turn vernier clip (8) is housed on chi (7), turn chi (7) end buckle (14) is housed, turn chi (7) middle part chalk slide slot (9) is housed, 0 degree pointer (6) is equipped with in described rotary base (1) left side, on the rotary base (1) of spill spin block (2) surrounding, angle index value (15) is housed.
2. a kind of compass for math teaching according to claim 1, it is characterized in that: chalk holddown groove (10) is equipped with in described vernier clip (8) centre, vernier clip (8) one sides are equipped with clamp nut (11), and axis scale (13) is equipped with in vernier clip (8) both sides, upper end.
3. a kind of compass for math teaching according to claim 1, is characterized in that: described in chalk slide slot (9) bilateral symmetry that turns on chi (7) length scale value (16) is housed.
4. a kind of compass for math teaching according to claim 1, is characterized in that: described spill spin block (2) is equipped with benchmark pointer (12) with the junction that turns chi (7).
5. a kind of compass for math teaching according to claim 1, is characterized in that: described rotary base (1) and spill spin block (2) are for circular.
6. a kind of compass for math teaching according to claim 2, is characterized in that: the axis scale (13) of described vernier clip (8) both sides, upper end is turning on the axis of chi (7) with benchmark pointer (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320654592.XU CN203511074U (en) | 2013-10-23 | 2013-10-23 | Compasses for mathematics teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320654592.XU CN203511074U (en) | 2013-10-23 | 2013-10-23 | Compasses for mathematics teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203511074U true CN203511074U (en) | 2014-04-02 |
Family
ID=50370054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320654592.XU Expired - Fee Related CN203511074U (en) | 2013-10-23 | 2013-10-23 | Compasses for mathematics teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203511074U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104002592A (en) * | 2014-05-22 | 2014-08-27 | 张泽奎 | Novel multifunctional compasses |
| CN106813563A (en) * | 2017-04-12 | 2017-06-09 | 张岩 | Angle measurement unit |
-
2013
- 2013-10-23 CN CN201320654592.XU patent/CN203511074U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104002592A (en) * | 2014-05-22 | 2014-08-27 | 张泽奎 | Novel multifunctional compasses |
| CN106813563A (en) * | 2017-04-12 | 2017-06-09 | 张岩 | Angle measurement unit |
| CN106813563B (en) * | 2017-04-12 | 2020-02-21 | 张岩 | Angle measuring 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: 20140402 Termination date: 20141023 |
|
| EXPY | Termination of patent right or utility model |