CN203697782U - Maths teaching compasses - Google Patents
Maths teaching compasses Download PDFInfo
- Publication number
- CN203697782U CN203697782U CN201420104803.7U CN201420104803U CN203697782U CN 203697782 U CN203697782 U CN 203697782U CN 201420104803 U CN201420104803 U CN 201420104803U CN 203697782 U CN203697782 U CN 203697782U
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- Prior art keywords
- circuit
- regulation foot
- circle
- arc
- electrically connected
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- 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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Abstract
The utility model discloses a pair of maths teaching compasses. The maths teaching compasses comprises a columnar rotating handle, one end of the rotating handle is connected with the top end of a connecting unit, a fixing compass leg and a rotating compass leg which are symmetrically arranged are hinged to the bottom end of the connecting unit, wherein the tail end of the fixing compass leg is provided with a sucker, and a displacement sensor for measuring the distance between the fixing compass leg and the rotating compass leg is arranged above the sucker; the tail end of the rotating compass leg is the head portion of a signal pen cartridge; the connecting unit is hollow and a control circuit is arranged inside the connecting unit; the control circuit comprises a CPU (central processing unit) circuit, a signal processing circuit, an output circuit and a power circuit, wherein the signal processing circuit, the output circuit and the power circuit are electrically connected with the CPU circuit, the signal processing circuit is also electrically connected with the displacement sensor, and the output circuit is also electrically connected with a nixie tube on the surface of the connecting unit; the nixie tube is used for displaying the radius of a circle or arc which is drawn through the compasses. The maths teaching compasses can help accurately draw a circle or arc with a required radius and can help rapidly draw the circle or arc without changing the center, thereby saving the drawing time.
Description
Technical field
The utility model relates to teaching aid technical field, relates in particular to a kind of compass for math teaching.
Background technology
In mathematical education, compasses are one of indispensable instruments, are often used in blackboard upper drawing circle or arc.Because the structure of existing mathematical education compasses is mostly, the swing handle of metal material, comprises two compass legs, one of them is fixing regulation foot, another is rotation regulation foot, and the end of wherein fixing regulation foot is provided with metal needle, and this metal pinprick is determined the center of circle on blackboard; Rotation regulation foot end is provided with chalk, and this chalk is for the periphery of picture circle or arc.But above-mentioned compasses are along with the development of teaching facilities, the quickening of study rhythm can not be satisfied the demand.Main manifestations is: the blackboard of school is updated to the blackboard of Glass blackboard or steel plate with baking paint material by original wood materials now, but not wooden blackboard is not easy to be punctured by metal needle, therefore the center of circle of drawn circle or arc can not well be determined, can skid and mobile phenomenon; And the drawn circle of existing compasses or the radius of arc be all estimated value, student is for not concept intuitively of the size of the radius of circle or arc so, if determine radius by other rulers are auxiliary, delays instructional blocks of time, uses inconvenient.
Utility model content
The purpose of this utility model is to provide a kind of compass for math teaching, and these compasses can guarantee that the center of circle do not move in picture process, thereby makes the process of picture circle or arc complete and save time fast; These compasses can draw the radius of required circle or arc fast and accurately simultaneously, thereby the time of having saved has been improved quality of instruction.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of compass for math teaching comprises cylindricality swing handle, one end of described swing handle is connected with the top of connecting portion, the bottom of described connecting portion is hinged with symmetrically arranged fixing regulation foot and rotation regulation foot, the cylindricality that described fixing regulation foot is hollow, the end of described fixing regulation foot is provided with sucker, in described fixing regulation foot described sucker above be provided with displacement transducer, described displacement transducer is for measuring distance between described fixing regulation foot end and described rotation regulation foot end; The cylindricality that described rotation regulation foot is hollow, and formed by the upper pin and the leftover bits and pieces that are threaded connection, sign pen core is housed in described leftover bits and pieces, the head of described signal pen core stretches out from described leftover bits and pieces end; Described connecting portion be hollow and inside be provided with control circuit, described control circuit comprises cpu circuit, and the signal processing circuit, output circuit and the power circuit that are electrically connected with described cpu circuit respectively; Described signal processing circuit is also electrically connected with described displacement transducer; Described output circuit is also electrically connected with the charactron that is located at described connecting portion surface, and described charactron is used for showing drawn radius of a circle.
Optimal way is that the side of described swing handle is provided with two handles.
Adopt after technique scheme, the beneficial effects of the utility model are: because compass for math teaching described in the utility model comprises cylindricality swing handle, one end of this swing handle is connected with the top of connecting portion, and the bottom of this connecting portion is hinged with symmetrically arranged fixing regulation foot and rotation regulation foot; Wherein fix the cylindricality that regulation foot is hollow, the end of this fixing regulation foot is provided with sucker, and this sucker holds blackboard for fixing regulation foot, and while having guaranteed to draw circle or arc, the center of circle can not be moved, and has saved the time of drawing circle or arc; Above sucker, be provided with displacement transducer, this displacement transducer is for measuring the distance between fixing regulation foot end and rotation regulation foot end simultaneously, and this distance is the radius of drawn circle or arc; Wherein rotate the cylindricality that regulation foot is hollow, and be made up of the upper pin and the leftover bits and pieces that are threaded connection, in wherein getting a foothold, sign pen core is housed, the head of this signal pen core stretches out from leftover bits and pieces end, the perimeter line of draw a picture circle or arc for the head of this signal pen core; Wherein connecting portion is hollow and inside is provided with control circuit, and this control circuit comprises cpu circuit, and the signal processing circuit, output circuit and the power circuit that are electrically connected with cpu circuit respectively; Wherein signal processing circuit is also electrically connected with displacement transducer; This output circuit is also electrically connected with the charactron that is located at connecting portion surface, and this charactron is for showing the radius of drawn circle or arc.Thereby use the utility model in the time of blackboard upper drawing circle or arc, and first to observe from charactron, mobile rotation regulation foot simultaneously, until demonstrate the radius of drawn circle or arc on charactron.Then allow sucker inhale on blackboard, the rotation rotation regulation foot head of signal pen core draws the periphery of circle or arc on blackboard.Be applicable to very much the blackboard of primary school because signal pen core does not have dust, and signal pen core can change at any time after being finished, while placement at ordinary times, also can not fracture easily.In sum, the utility model can draw circle or the arc of required radius fast on blackboard, has saved the time, has indirectly improved quality of instruction.
Accompanying drawing explanation
Fig. 1 is the structural representation of compass for math teaching of the present utility model;
In figure: 1-swing handle, 2-connecting portion, 3-fixing regulation foot, 30-sucker, 4-rotation regulation foot, 40-upper pin, 41-leftover bits and pieces, the head of 410-signal pen core, 5-handle, 60-charactron, 61-displacement transducer.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of compass for math teaching, comprises cylindricality swing handle 1, and the side of this swing handle 1 is provided with two handles 5; One end of this swing handle 1 is connected with the top of connecting portion 2, and the bottom of this connecting portion 2 is hinged with symmetrically arranged fixing regulation foot 3 and rotation regulation foot 4; Wherein fix the cylindricality that regulation foot 3 is hollow, the end of this fixing regulation foot 3 is provided with sucker 30, above the fixing interior sucker 30 of regulation foot 3, is provided with displacement transducer 61, and this displacement transducer 61 is for measuring the distance between fixing regulation foot 3 ends and rotation regulation foot 4 ends; Wherein rotate the cylindricality that regulation foot 4 is hollow, by the upper pin 40 being threaded connection with get a foothold and 41 form, wherein get a foothold in 41 sign pen core is housed, the head 410 of this signal pen core stretches out from 41 the end of getting a foothold; Wherein connecting portion 2 is hollow and inside is provided with control circuit, and this control circuit comprises cpu circuit, and the signal processing circuit, output circuit and the power circuit that are electrically connected with cpu circuit respectively; Wherein signal processing circuit is also electrically connected with displacement transducer 61; Wherein output circuit is also electrically connected with the charactron 60 that is located at connecting portion 2 surfaces, and this charactron 60 is for showing the radius of drawn circle or arc.
The utility model in use, is first opened the switch of connecting portion 2, and the optional use of power supply of inner control circuit is battery operated.After switch opens, eyes are observed the numerical value on charactron 60, regulate rotation regulation foot 4 pull open or further and fixing regulation foot 3 between distance, this distance is drawn circle or the radius of arc, and this distance is presented on charactron 60.Till the numerical value on charactron 60 is required numerical value, stop regulating rotation regulation foot 4; Then the sucker 30 of fixing regulation foot 3 ends is adsorbed on blackboard, because present blackboard is mostly glass material, therefore sucker 30 can well be adsorbed on blackboard, has fixed the center of circle of drawn circle or arc.The head 410 that now rotates the signal pen core of regulation foot 4 contacts with blackboard, then holds handle 5 and borrows power, then allows rotation regulation foot 4 rotate take sucker 30 as the center of circle; The periphery of last required circle or arc is drawn on blackboard.Due to the adjusting of the radius of above-mentioned circle or arc easily fast and accurately, in allowing student there is round intuitively concept, saved and drawn circle or arc and adjust circle or big or small time of arc, indirectly improved quality of instruction.
In addition, the cylindricality rotation regulation foot 4 of the utility model hollow is made up of upper pin 40 and leftover bits and pieces 41, the 41 interior placement signal pen cores of getting a foothold, the head 410 of this signal pen core exposes as the pen of compasses and uses from 41 the end of getting a foothold, because the head 410 of signal pen core is easy to leave a trace on the blackboard of glass material, very convenient while making picture circle or arc.And signal pen core frangibility not in the time that the utility model is deposited, and the upper pin 40 being threaded and get a foothold and 41 open very conveniently, make the replacing of signal pen core very convenient; Further drawn circle or the arc of signal pen core wiped Shi Buhui generation dust, utilizes pupil to grow up healthy and sound.And the utility model is simple in structure, easy to operate.
The above preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing, be equal to compass for math teaching and improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model and principle.
Claims (2)
1. a compass for math teaching, comprises cylindricality swing handle, and one end of described swing handle is connected with the top of connecting portion, and the bottom of described connecting portion is hinged with symmetrically arranged fixing regulation foot and rotation regulation foot, it is characterized in that:
The cylindricality that described fixing regulation foot is hollow, the end of described fixing regulation foot is provided with sucker, in described fixing regulation foot described sucker above be provided with displacement transducer, described displacement transducer is for measuring distance between described fixing regulation foot end and described rotation regulation foot end;
The cylindricality that described rotation regulation foot is hollow, and formed by the upper pin and the leftover bits and pieces that are threaded connection, sign pen core is housed in described leftover bits and pieces, the head of described signal pen core stretches out from described leftover bits and pieces end;
Described connecting portion be hollow and inside be provided with control circuit, described control circuit comprises cpu circuit, and the signal processing circuit, output circuit and the power circuit that are electrically connected with described cpu circuit respectively; Described signal processing circuit is also electrically connected with described displacement transducer; Described output circuit is also electrically connected with the charactron that is located at described connecting portion surface, and described charactron is used for showing drawn radius of a circle.
2. compass for math teaching according to claim 1, is characterized in that: the side of described swing handle is provided with two handles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420104803.7U CN203697782U (en) | 2014-03-10 | 2014-03-10 | Maths teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420104803.7U CN203697782U (en) | 2014-03-10 | 2014-03-10 | Maths teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203697782U true CN203697782U (en) | 2014-07-09 |
Family
ID=51048272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420104803.7U Expired - Fee Related CN203697782U (en) | 2014-03-10 | 2014-03-10 | Maths teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203697782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106965601A (en) * | 2017-04-17 | 2017-07-21 | 李良杰 | Multifunctional compass |
-
2014
- 2014-03-10 CN CN201420104803.7U patent/CN203697782U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106965601A (en) * | 2017-04-17 | 2017-07-21 | 李良杰 | Multifunctional compass |
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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: 20140709 Termination date: 20150310 |
|
| EXPY | Termination of patent right or utility model |