CN203449809U - Foldable magnetic compasses - Google Patents
Foldable magnetic compasses Download PDFInfo
- Publication number
- CN203449809U CN203449809U CN201320339869.XU CN201320339869U CN203449809U CN 203449809 U CN203449809 U CN 203449809U CN 201320339869 U CN201320339869 U CN 201320339869U CN 203449809 U CN203449809 U CN 203449809U
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- CN
- China
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- plate
- strong magnet
- compasses
- adjustment
- adjustable plate
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- Expired - Fee Related
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Abstract
The utility model belongs to the technical field of teaching appliances, in particularly relates to foldable magnetic compasses. The foldable magnetic compasses comprise a bottom plate, an adjustment plate and an absorption plate which are arranged on the bottom plate, wherein the adjustment plate is arranged between the bottom plate and the absorption plate, one end of each of the adjustment plate and the absorption plate is fixed on the bottom plate by adjustment nuts, a strong magnet is arranged on the bottom of the other end of the absorption plate, the position of the adjustment plate relative to the absorption plate can be freely adjusted at the loose state of the adjustment nuts, a pen insert hole is formed on the other end of the adjustment plate, and a rotary nut communicated with the pen insert hole is arranged on the side part of the adjustment plate. The compasses can be firmly absorbed on a magnetic blackboard, and not easily drop down from the blackboard, and a relatively standard circle can be very conveniently drawn by only one hand.
Description
Technical field
The utility model belongs to teaching aid technical field, relates in particular to a kind of collapsible magnetic compasses.
Background technology
Teacher, when blackboard upper drawing circle, adopts three kinds of compasses at present: on a supporting leg of the first compasses, iron nail is housed and is fixed on blackboard; On a supporting leg of the second compasses, rubber being housed is fixed on blackboard; On a supporting leg of the third compasses, sucker being housed is fixed on blackboard.Present blackboard is all magnet board, and its feature is made of iron sheet material, surperficial smoother, and very hard again, magnetic a little less than.Teacher when the blackboard upper drawing circle, has many weak points with above-mentioned compasses: the first compasses, and draw bowlder iron nail and be not easy on blackboard fixingly, be easy to landing from blackboard, and nail is easy to blackboard to cause damage.It is unstable too that the second compasses are made bowlder, easily landing.The third compasses sucker is difficult to hold blackboard sometimes, and easily from blackboard landing, and sucker is softer, and in the process of drawing, radius of circle has some variation, and drawn circle is standard not too.
Summary of the invention
The purpose of this utility model is to solve above-described technical problem, and a kind of collapsible magnetic compasses are provided, and its technical scheme is as follows:
A kind of collapsible magnetic compasses, comprise base plate, it is characterized in that, described base plate is provided with adjustable plate and adsorption plate, described adjustable plate is between base plate and adsorption plate, described adjustable plate and one end of adsorption plate are fixed on base plate by adjusting nut, the bottom of the other end of described adsorption plate is provided with strong magnet, described adjustable plate can free adjustment under adjusting nut releasing orientation and adsorption plate between position, on the other end of described adjustable plate, offer pen plughole, the sidepiece of described adjustable plate is provided with the rotating nut communicating with pen plughole.
Optimal way is, described strong magnet is annular strong magnet, and the center of described annular strong magnet is provided with the screw flushing with annular strong magnet.
Optimal way is to be provided with stiffener between described rotating nut and adjustable plate.
Optimal way is to be provided with and to increase plate between described adsorption plate and strong magnet.
The collapsible magnetic compasses that the utility model provides, when in use,
1. first the one end with magnet is placed on blackboard, by magnet, whole compasses are adsorbed on blackboard, and the center of magnet is exactly the center of circle of drawn circle.
2. then adjusting nut is unclamped, make freely activity of adjustable plate, adjust the position of adjustable plate, make it arrive the position of required picture radius of a circle.
3. then in pen plughole, insert chalk, by rotating nut, chalk is fixed in pen plughole.Then adjusting nut is being tightened.
4. arrest chalk, can directly on blackboard, justify.
Between rotating nut described in the utility model and adjustable plate, be provided with stiffener.Can be so that chalk can better be fixed in pen plughole by stiffener.
Between adsorption plate described in the utility model and strong magnet, be provided with and increase plate.Be free to regulate and increase the height of plate, thereby strong magnet and base plate are positioned in same level, make picture circle more convenient and accurate.
Strong magnet described in the utility model is annular strong magnet, and the center of described annular strong magnet is provided with the screw flushing with annular strong magnet.By coating chalk dust with chalk on middle screw, when inhaling on magnet board, magnetic compasses can leave the vestige of chalk dust, and this vestige is exactly the center of circle of circle.Can, so that the center of circle is more obvious, contribute to teaching like this.
The utility model is aimed at common compasses to carry out easily moving in picture circle on blackboard, and cumbersome need to operate time, neither be very convenient while carrying.
Compasses of the present utility model can be inhaled on magnet board firmly, are not easy landing from blackboard, draw bowlder as long as just can draw easily the circle of a standard of comparison with a hand, and magnetic compasses are more much smaller than above-mentioned three kinds of compasses, light and handy, easy to use.
Accompanying drawing explanation
Fig. 1 schematic diagram of the present utility model.
Fig. 2 adjustable plate schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with Fig. 1 and Fig. 2, illustrate embodiment:
A kind of collapsible magnetic compasses, comprise base plate 1, it is characterized in that, described base plate 1 is provided with adjustable plate 2 and adsorption plate 3, described adjustable plate 2 is between base plate 1 and adsorption plate 3, described adjustable plate 2 and one end of adsorption plate 3 are fixed on base plate 1 by adjusting nut 4, the bottom of the other end of described adsorption plate 3 is provided with strong magnet 5, described adjustable plate 2 can free adjustment under adjusting nut 4 releasing orientations and adsorption plate 3 between position, on the other end of described adjustable plate 2, offer pen plughole 6, the sidepiece of described adjustable plate 2 is provided with the rotating nut 7 communicating with pen plughole 6.
Optimal way is, described strong magnet 5 is annular strong magnet, and the center of described annular strong magnet is provided with the screw 8 flushing with annular strong magnet.
Optimal way is to be provided with stiffener 9 between described rotating nut 7 and adjustable plate 2.
Optimal way is to be provided with and to increase plate 10 between described adsorption plate 3 and strong magnet 5.
The collapsible magnetic compasses that the utility model provides, when in use,
1. first the one end with magnet is placed on blackboard, by magnet, whole compasses are adsorbed on blackboard, and the center of magnet is exactly the center of circle of drawn circle.
2. then adjusting nut is unclamped, make freely activity of adjustable plate, adjust the position of adjustable plate, make it arrive the position of required picture radius of a circle.
3. then in pen plughole, insert chalk, by rotating nut, chalk is fixed in pen plughole.Then adjusting nut is being tightened.
4. arrest chalk, can directly on blackboard, justify.
Claims (4)
1. collapsible magnetic compasses, comprise base plate, it is characterized in that, described base plate is provided with adjustable plate and adsorption plate, described adjustable plate is between base plate and adsorption plate, described adjustable plate and one end of adsorption plate are fixed on base plate by adjusting nut, the bottom of the other end of described adsorption plate is provided with strong magnet, described adjustable plate can free adjustment under adjusting nut releasing orientation and adsorption plate between position, on the other end of described adjustable plate, offer pen plughole, the sidepiece of described adjustable plate is provided with the rotating nut communicating with pen plughole.
2. collapsible magnetic compasses as claimed in claim 1, is characterized in that, described strong magnet is annular strong magnet, and the center of described annular strong magnet is provided with the screw flushing with annular strong magnet.
3. collapsible magnetic compasses as claimed in claim 1, is characterized in that, between described rotating nut and adjustable plate, are provided with stiffener.
4. collapsible magnetic compasses as claimed in claim 1, is characterized in that, between described adsorption plate and strong magnet, are provided with and increase plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320339869.XU CN203449809U (en) | 2013-06-14 | 2013-06-14 | Foldable magnetic compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320339869.XU CN203449809U (en) | 2013-06-14 | 2013-06-14 | Foldable magnetic compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203449809U true CN203449809U (en) | 2014-02-26 |
Family
ID=50129711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320339869.XU Expired - Fee Related CN203449809U (en) | 2013-06-14 | 2013-06-14 | Foldable magnetic compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203449809U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332046A (en) * | 2013-06-14 | 2013-10-02 | 雷洪炳 | Folding magnetic compasses |
-
2013
- 2013-06-14 CN CN201320339869.XU patent/CN203449809U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332046A (en) * | 2013-06-14 | 2013-10-02 | 雷洪炳 | Folding magnetic compasses |
| CN103332046B (en) * | 2013-06-14 | 2016-01-06 | 雷洪炳 | A kind of collapsible magnetic compasses |
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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: 20140226 Termination date: 20150614 |
|
| EXPY | Termination of patent right or utility model |