CN206049143U - A kind of compass for students - Google Patents
A kind of compass for students Download PDFInfo
- Publication number
- CN206049143U CN206049143U CN201620864629.5U CN201620864629U CN206049143U CN 206049143 U CN206049143 U CN 206049143U CN 201620864629 U CN201620864629 U CN 201620864629U CN 206049143 U CN206049143 U CN 206049143U
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- CN
- China
- Prior art keywords
- foot
- fixed foot
- fan
- angle scale
- fixed
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- Expired - Fee Related
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- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
A kind of compass for students disclosed in this utility model, including the fixed foot and drawing foot that are connected by rotating shaft, near the side of rotating shaft on fixed foot, and fan-shaped graduated tile is fixed with the side wall of drawing foot, fan-shaped graduated tile is with rotating shaft, fixed foot, the intersecting point of drawing foot is used as the center of circle, rotate in the plane to be formed around fixed foot in drawing bottoms, the central axis projection of fixed foot is Chong Die with fan-shaped graduated tile zero graduation line projection, and fan-shaped graduated tile and the intersection point of fixed foot are zero graduation point, fixed foot is divided into two parts by zero graduation point, rotary shaft to zero graduation point part is the A sections for fixing foot, remaining part is the B sections for fixing foot, the lenth ratio of A sections and B sections is the ratio for measuring radius value and real radius value.The utility model has the advantage of, picture circle can be completed in the case of only compasses or the task of arc is drawn for student for the rounded steps of simplification existing compasses.
Description
Technical field
This utility model is related to learning tool technical field, specially compass for students.
Background technology
Traditional compasses simple structure, only two feet around same Zhou Xuanzhuan：One is used to fix home position
Fixed foot, a drawing foot for being used for drawing.When drawing circle or arc with this kind of compasses, in addition to the center of circle is determined, it is necessary to first use scale
Chi measuring radius, central angle is measured with protractor.
That is, drawing circle with traditional compasses, student must possess three sample instruments simultaneously：Compasses, rule, angulation
Device.Once student does not have any of which the same, the task of drawing circle cannot just be completed.
Utility model content
In order to solve above-mentioned technical problem, the utility model discloses a kind of compass for students, its purpose realized is,
The circle or arc of different radii can be drawn using compasses without the need for other appurtenances, the use of appurtenance is reduced, work is improved
Make efficiency.
To achieve these goals, the technical scheme that this utility model is taken is one kind that this utility model is designed
Life compasses, including the fixed foot and drawing foot that are connected by rotating shaft, near the side of rotating shaft and near drawing on fixed foot
Be fixed with fan-shaped graduated tile on the side wall of foot, fan-shaped graduated tile using the intersecting point of rotating shaft, fixed foot, drawing foot as the center of circle,
Drawing bottoms is rotated in the plane to be formed around fixed foot, central axis projection and the fan-shaped graduated tile zero graduation line projection of fixed foot
Overlap, and the intersection point of fan-shaped graduated tile and fixed foot is zero graduation point, fixed foot is divided into two parts, rotary shaft by zero graduation point
It is the A sections of fixing foot to zero graduation point part, remaining part is the B sections for fixing foot, and A sections are measurement half with the lenth ratio of B sections
Footpath is worth the ratio with real radius value.The radius for measuring drawn circle that can be instant by the graduated tile set up, due to fixed foot
The angle formed and drawing foot between gradually increases, straight after directly being converted on graduated tile hence with ratio relation
The actual radius of mark is connect, it is accurate, convenient, the use of aid is reduced, needed for can drawing only with a compasses
Circle or arc.
Further, pointer is removably connected with drawing foot, pointer has kink, and kink is to fan-shaped graduated tile
Bending is until fit with fan-shaped graduated tile.The pointer of bending can help fixed drawing foot, drawing foot stablized, be difficult in drawing
It is subjected to displacement, so as to accurately draw the circle or arc of demand, in addition, may be used to indicate that the concrete numerical value of radius.
Further, the compasses include circular angle scale, and circular angle scale home position is provided with perforation, and circular angle scale leads to
Perforation being crossed through fixed foot, and being connected with fixed foot by serpentine buckle A, fixed foot is rotated and buckle A driven in circular angle scale
Upper rotation measuring angle.The said structure set up can accurately set the radian of picture arc, more subtract the circular arc for drawing demand just.
Further circle angle scale is provided with connecting hole, and buckle B is provided with annular groove, and buckle B is using groove through connection
Hole is installed on circular angle scale, straight with diameter greater than circular angle scale with the grove shaped circumferential surface of circular angle scale junction
Footpath, on annular groove, and circular angle scale junction be nested with fixed pad.So that buckle B and angle scale stable connection, from
And the circle or arc that make to draw are accurate.
To sum up, this utility model has the advantages that, the rounded steps of the existing compasses of simplification, allows the student can be only
Picture circle is completed in the case of there are compasses or the task of arc is drawn.
Description of the drawings
Fig. 1 is this utility model planar structure schematic diagram；
Fig. 2 is this utility model circle angle scale planar structure schematic diagram；
Fig. 3 is this utility model another kind example structure schematic diagram；
In figure, 1, rotating shaft；2nd, fixed foot；3rd, drawing foot；4th, fan-shaped graduated tile；5th, circular angle scale；6th, bore a hole；7th, buckle
A。
Specific embodiment
Below by specific embodiment and combine accompanying drawing this utility model is described in further detail.
With reference to shown in Fig. 1, a kind of compass for students disclosed in this utility model, including the fixed foot 2 connected by rotating shaft 1
With drawing foot 3, fan-shaped graduated tile 4 is fixed near the side of rotating shaft and on the side wall of close drawing foot on fixed foot, it is fan-shaped
Graduated tile rotates the plane to be formed using the intersecting point of rotating shaft, fixed foot, drawing foot as the center of circle in drawing bottoms around fixed foot
On, the central axis projection of fixed foot is Chong Die with fan-shaped graduated tile zero graduation line projection, and the friendship of fan-shaped graduated tile and fixed foot
It is zero graduation point to put, and fixed foot is divided into two parts by zero graduation point, and rotary shaft to zero graduation point part is the A sections for fixing foot,
It is the ratio for measuring radius value and real radius value that remaining part is the lenth ratio of the B sections for fixing foot, A sections and B sections.For example,
When zero graduation point is just in the centre position of fixed foot, i.e., when A segment length is equal to B segment length, measurement radius value is just reality
It is worth 2 times, so that it may by scale with " 0.2 centimetre " as least unit, so can directly draw real radius value.Further, exist
Be removably connected with pointer on drawing foot, pointer has a kink, kink to the bending of fan-shaped graduated tile until with fan-shaped scale
Plate is fitted.
The compasses also include circular angle scale 5, and with reference to shown in Fig. 2, circular angle scale home position is provided with perforation to its structure
6, circular angle scale is by boring a hole through fixed foot, and is connected with fixed foot by serpentine buckle A7, with reference to shown in Fig. 3, fixes
Foot is rotated and drives buckle A rotation measuring angles on circular angle scale, and when installing circular angle scale, the top of flicking buckle A will
Circular angle scale is stuck on circular angle scale through fixed foot, buckle A lower ends, and buckle is stuck at round angle circle setting and can be set to
Zero graduation line, its scale can be arbitrary scale, such as, with " 5 degree " as least unit, so can measure angle when rotating.
Further, buckle B is connected with circular angle scale perforation, buckle B is stuck on fixed foot.
Circular angle scale is provided with connecting hole, and buckle B is provided with annular groove, and buckle B is installed on through connecting hole using groove
The diameter with diameter greater than circular angle scale on circular angle scale, with the grove shaped circumferential surface of circular angle scale junction.
On annular groove, and circular angle scale junction be nested with fixed pad.
If using this novel bow compass, by the process simplification for drawing circle or arc can be：1 li of a treaty is drawn in center of circle side
The long short-term of rice；The established angle scale on compasses, and bipod is adjusted on fan-shaped graduated tile at the scale of correspondence formulation radius；
Angle scale " 0 " graduation mark is directed at short-term, rotates drawing for compasses；When short-term is aligned formulates the scale of angle, complete, need not
Using other aids.
Preferred embodiment of the present utility model is the foregoing is only, this utility model is not limited to, for this
For the technical staff in field, this utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. are should be included within protection domain of the present utility model.
Claims (6)
1. a kind of compass for students, including the fixed foot (2) and drawing foot (3) that are connected by rotating shaft (1), it is characterised in that
It is fixed with fan-shaped graduated tile (4) on fixed foot near the side of rotating shaft and on the side wall of drawing foot, fan-shaped graduated tile is turning
The intersecting point of axle, fixed foot, drawing foot is rotated in the plane to be formed around fixed foot in drawing bottoms as the center of circle, fixed foot
Central axis projection is Chong Die with fan-shaped graduated tile zero graduation line projection, and fan-shaped graduated tile and the intersection point of fixed foot are zero graduation
Fixed foot is divided into two parts by point, zero graduation point, and rotary shaft to zero graduation point part is the A sections for fixing foot, and remaining part is
The lenth ratio of the B sections of fixed foot, A sections and B sections is the ratio for measuring radius value and real radius value.
2. compass for students according to claim 1, it is characterised in that be removably connected with pointer on drawing foot, refer to
Needle set has kink, and kink is to the bending of fan-shaped graduated tile until fitting with fan-shaped graduated tile.
3. compass for students according to claim 1, it is characterised in that the compasses also include circular angle scale (5), circular
Angle scale home position is provided with perforation (6), circular angle scale by perforation through fixed foot, and by serpentine buckle A (7) with
Fixed foot connection, fixed foot are rotated and drive buckle A rotation measuring angles on circular angle scale.
4. compass for students according to claim 3, it is characterised in that be connected with buckle B at circular angle scale perforation,
Buckle B is stuck on fixed foot.
5. compass for students according to claim 4, it is characterised in that circular angle scale is provided with connecting hole, and buckle B is provided with
Annular groove, buckle B are installed on circular angle scale through connecting hole using groove, the groove ring with circular angle scale junction
The diameter with diameter greater than circular angle scale on shape surface.
6. compass for students according to claim 5, it is characterised in that on annular groove, and circular angle scale connection
Place is nested with fixed pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620864629.5U CN206049143U (en) | 2016-08-10 | 2016-08-10 | A kind of compass for students |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620864629.5U CN206049143U (en) | 2016-08-10 | 2016-08-10 | A kind of compass for students |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206049143U true CN206049143U (en) | 2017-03-29 |
Family
ID=58380270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620864629.5U Expired - Fee Related CN206049143U (en) | 2016-08-10 | 2016-08-10 | A kind of compass for students |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206049143U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773235A (en) * | 2018-06-14 | 2018-11-09 | 黄永怀 | A kind of combined type mathematical education drawing instrument |
-
2016
- 2016-08-10 CN CN201620864629.5U patent/CN206049143U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773235A (en) * | 2018-06-14 | 2018-11-09 | 黄永怀 | A kind of combined type mathematical education drawing instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170329 Termination date: 20180810 |