CN106864114B - A kind of compasses - Google Patents
A kind of compasses Download PDFInfo
- Publication number
- CN106864114B CN106864114B CN201710138477.XA CN201710138477A CN106864114B CN 106864114 B CN106864114 B CN 106864114B CN 201710138477 A CN201710138477 A CN 201710138477A CN 106864114 B CN106864114 B CN 106864114B
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- radius
- disk
- columns
- rotary shaft
- pen
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- 238000010276 construction Methods 0.000 claims description 6
- 244000309464 bull Species 0.000 claims description 2
- 238000013507 mapping Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002547 anomalous effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000003550 marker Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L9/00—Circular curve-drawing or like instruments
- B43L9/02—Compasses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/16—Compasses, i.e. with a pair of pivoted arms
- G01B3/166—Compasses, i.e. with a pair of pivoted arms provided with a measuring scale
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The present invention relates to a kind of compasses, including drawing portion and the positioning region for being used to support and fixing the drawing portion;The drawing portion includes estimating disk, estimating disk axis direction along described the radius ruler being arranged in the rotary shaft estimated on disk, in the rotary shaft estimated below disk and perpendicular to the rotary shaft and the radius pen being fastened on straight down on the radius ruler, the radius pen is arranged and can be moved horizontally along the radius ruler;The positioning region includes and the lower fixed ring for estimating disk coaxial arrangement, the A columns that are vertically arranged and the B columns being vertically arranged, the lower end of the A columns and the B columns is relatively fixed respectively on the circumferential edges of the lower fixed ring, and the upper end of the A columns and the B columns is relatively fixed respectively on the circumferential edges for estimating disk.The compasses of the present invention are safe to use, and the good precision of mapping effect is high, simple in structure, operation is flexible, easy to carry, can improve the working efficiency and operation enjoyment of user.
Description
Technical field
The invention belongs to drawing tool technical fields, and in particular to a kind of compasses.
Background technology
Compasses are for, to draw the tool of circle or string, being usually used in construction with ruler and compasses in mathematics and drawing.Traditional compasses are logical
It is often made of metal, including two feet, the upper end of two feet is hinged, and lower end arbitrarily can separate or close up, to adjust painted circular arc
The size of radius, wherein the end of a foot is needle point, for fixing drawing, the end of another foot can be packed into drawing pencil line
Or the line of ink marker, for drawing.
However, the needle point that compasses in the prior art are used to fix drawing is very sharp, drawing or desktop can not only be made
At damage, to operator, there are security risks, and it is easy to appear cause because operation is firmly uneven during mapping
It easily slides in the center of circle so that mapping is ineffective;In addition to this, it is easy to happen offset for the tip part of pen of drawing, causes to make
It is bad to scheme superior degree;And traditional compasses can not disposably draw concentric circles, need multi-pass operation, it is time-consuming and laborious;It can not determine circle
The radian of arc, needs independent measurement, causes inconvenient to use.
Invention content
In view of this, it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of compasses, compasses of the invention
Safe to use, the good precision of mapping effect is high, simple in structure, operation is flexible, easy to carry, can improve the working efficiency of user
With operation enjoyment.
In order to achieve the above object, the present invention adopts the following technical scheme that:
A kind of compasses, including drawing portion and the positioning region for being used to support and fixing the drawing portion;
The drawing portion include estimate disk, along it is described estimate disk axis direction be arranged the rotary shaft estimated on disk,
It perpendicular to the radius ruler of rotary shaft setting and is fastened in the rotary shaft estimated below disk and straight down
Radius pen on the radius ruler, the radius pen can be moved horizontally along the radius ruler;
The positioning region includes and the lower fixed ring for estimating disk coaxial arrangement, the A columns that are vertically arranged and vertical
The lower end of the B columns of setting, the A columns and the B columns is relatively fixed respectively in the circumferential edges of the lower fixed ring
On, the upper end of the A columns and the B columns is relatively fixed respectively on the circumferential edges for estimating disk.
The compasses of the present invention are made of metal with tradition, including two feet, and the upper end of two feet is hinged, and lower end can be random
It separates or closes up, to adjust the size of painted arc radius, wherein the end of a foot is needle point, it is another for fixing drawing
The end of foot can be packed into drawing pencil line or the line of ink marker, and the compasses structure for drawing is different;
Present invention improves over the fixed forms of traditional compasses first, using what is be made of lower fixed ring, A columns and B columns
Positioning region is fixed, and since lower fixed ring is contacted with paper or desktop for face, for needle point fixation, contact area is more
Greatly, fixation is more firm, therefore will not be damaged to paper or desktop etc., will not make circle because of reasons such as the breakages of paper
Rule occur to slide and then influence the precision drawn, while also avoiding to security risk caused by operator;
In addition invention increases the settings of radius ruler, while by radius pen can be erected in a manner of radius ruler horizontal anomalous movement
It is directly fastened on radius ruler downwards, the circle or circular arc of arbitrary radius can not only be drawn out, and can determine the half of circle or circular arc
Diameter size further increases the precision of the present invention;
When in use, can compasses be directly placed on paper etc. to draw in plane, compresses lower fixed ring, then stirs
Shaft or the radius ruler being connected with shaft, can draw out round or circular arc, and the radius of the circle or circular arc drawn can be with
It is determined by the scale on the radius ruler corresponding to radius pen, level stirs radius when drawing the circle or circular arc of different radii
The size of style section radius.
Preferably:The rotary shaft by be arranged it is described estimate the bearing of dish axle in the heart be threaded through it is described estimate on disk,
Swingle is provided in the rotary shaft estimated above disk, the swingle is parallel to the radius ruler, the rotation
Telltale mark is provided on bar, the telltale mark marks the number of rotation of the radius pen with the rotation of the swingle.
The setting of swingle further simplifies the operation of the present invention, keeps it more convenient when in use, in addition revolves
On bull stick the setting of telltale mark can further accurate drawn circular arc the number of degrees so that the present invention be not only simple in structure,
Operation is flexible, and the good precision of effect of mapping is high, additionally it is possible to improve the working efficiency and operation enjoyment of user.
Preferably:It is described estimate slowspeed machine and control handle are provided on disk, the output shaft of the slowspeed machine is located at
The shaft core position for estimating disk, the rotary shaft are fixedly connected with the output shaft of the slowspeed machine, are set in the rotary shaft
It is equipped with power supply, for the slowspeed machine with the control handle by the power electric connection, the control handle control is described defeated
The number of rotation of shaft.
The present invention can also be mapped by the way of electronic, be revolved by the way that slowspeed machine and control are arranged on estimating disk
Button, wherein control handle can control the number of rotation of output shaft, and the gear on adjusting control knob draws the circle of different radians
Arc, electronic mode map it is not only time saving and energy saving and also mapping effect it is more accurate.
Further:The rotary shaft is hollow-core construction, and the lower end of the rotary shaft is equipped with to mark center location
The center of circle pen.
In view of in drawing course it needs to be determined that the center of circle, the present invention sets rotary shaft to hollow-core construction, and is rotating
The lower end installation center of circle pen of axis is to realize positioning and the mark in the center of circle, and center of circle pen is different from needle point, will not destroy paper or
Desktop and other items will not scratch user.
Further:The lower end of the rotary shaft is equipped with laser infrared lamp, and the laser infrared lamp is revolved with the control
By the power electric connection, the control handle controls the keying of the laser infrared lamp and controls the rotation of the output shaft button
Turn the number of degrees.
When using electronic mode, in order to further increase the convenience that the present invention uses, pacify in the lower end of rotary shaft
Laser infrared lamp is filled, after startup power supply, the point light source of laser infrared lamp transmitting can be used as determining the label in the center of circle.
Preferably:The both ends of the A columns respectively with it is described to estimate disk and the lower fixed ring hinged, the B columns
Both ends also respectively with described to estimate disk and the lower fixed ring hinged.
A columns and B columns are fixed on by hinged mode by the present invention to be estimated on disk and lower fixed ring, when not needing
When using compasses, A columns and B columns are rotated to same direction, until estimating disk and the lower overlap-like state of fixed ring, thus
The volume for reducing compasses makes it easy to carry and store.
Preferably:Be provided on the radius ruler can along the clip of the radius ruler horizontal movement, the clip top
Side is installed with the card slot for plugging the radius ruler, and the clip is removably sheathed on described half by the card slot
The outside of diameter ruler corresponds to and is provided with reading window on the clip at the radius ruler graduation mark, and the edge of the reading window is set
It is equipped with the indicateing arm for positioning the radius ruler graduation mark, is provided with to install the radius pen below the clip
Accommodating cavity corresponds to and is provided with the first fixed knob on the clip side wall of the accommodating cavity, and first fixed knob passes through
Perpendicular to the screw in the radius direction to fasten the radius pen.
Further:The top of the clip is additionally provided with the second fixed knob, second fixed knob by perpendicular to
The screw in the radius ruler direction is to fasten the clip.
Preferably:Clip setting 1-3.
When clip is 1 or more, each clip can be fixed on the radius ruler of different location, then respectively in clip
Lower part install pencil, it is time saving and energy saving the needs of can meeting while draw multiple concentric circles when rotating shaft.
Preferably:The bottom surface of the lower fixed ring is provided with non-slip mat.
The setting of non-slip mat further increases the fixed function of lower fixed ring, increases its precision of mapping.
Beneficial effects of the present invention:
1, present invention improves over the fixed forms of traditional compasses, are determined using what is be made of lower fixed ring, A columns and B columns
Position portion is fixed, and since lower fixed ring is contacted with paper or desktop for face, for needle point fixation, contact area is more
Greatly, fixation is more firm, therefore will not be damaged to paper or desktop etc., will not make circle because of reasons such as the breakages of paper
Rule occur to slide and then influence the precision drawn, while also avoiding to security risk caused by operator;
In addition invention increases the settings of radius ruler, while by radius pen can be erected in a manner of radius ruler horizontal anomalous movement
It is directly fastened on radius ruler downwards, the circle or circular arc of arbitrary radius can not only be drawn out, and can determine the half of circle or circular arc
Diameter size further increases the precision of the present invention;
2, the present invention, which can be used to draw manually, can also be used electronic drawing, when using mapping manually, above shaft
Swingle is set, further simplifies the operation of the present invention, keeps it more convenient when in use, in addition positioned on swingle
The setting of label can further accurate drawn circular arc the number of degrees so that the present invention be not only simple in structure, operate it is flexible, and
And the good precision of mapping effect is high, additionally it is possible to improve the working efficiency and operation enjoyment of user;
When electronic mapping, by the way that slowspeed machine and control handle are arranged on estimating disk, output shaft is controlled with control handle
Number of rotation, the gear on adjusting control knob to draw the circular arc of different radians, map not only time saving province by this mapping mode
Power and mapping effect it is more accurate;
3, the present invention sets rotary shaft to hollow-core construction, and in the lower end of rotary shaft installation center of circle pen, is arranged such full
Foot can go out center location, and center of circle pen is not when in the drawing course it needs to be determined that center of circle with center of circle pen positioning and mark
It is same as needle point, paper or desktop and other items will not be destroyed, user will not be scratched;In addition to this, when being set on estimating disk
When setting motor, also laser infrared lamp can be installed in the lower end of rotary shaft to replace center of circle pen, after startup power supply, laser infrared lamp hair
The point light source penetrated can be used as determining the label in the center of circle, further increase the convenience that the present invention uses;
4, A columns and B columns are fixed on by hinged mode and estimate on disk and lower fixed ring by the present invention, when being not required to
When using compasses, A columns and B columns are rotated to same direction, until estimate disk and the lower overlap-like state of fixed ring, by
This reduces the volume of compasses, makes it easy to carry and store.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of the invention;
Fig. 2 is the structural schematic diagram of another embodiment of the present invention;
Fig. 3 is radius ruler and the structural schematic diagram after the assembly of radius pen in one embodiment of the invention;
Fig. 4 is the side view of clip in one embodiment of the invention.
1 in figure, estimate disk;2, rotary shaft;3, radius ruler;4, radius pen;5, lower fixed ring;6, A columns;7, B columns;8、
Swingle;9, slowspeed machine;10, control handle;11, laser infrared lamp;12, center of circle pen;13 clips;14, card slot;15, first
Fixed knob;16, the second fixed knob;17, window is read.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, technical scheme of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Shown in as shown in Figure 1, Figure 3 and Figure 4, the present invention provides a kind of compasses, including drawing portion and it is used to support and fixes institute
State the positioning region in drawing portion;Drawing portion include estimate disk 1, along estimate rotary shaft 2 that 1 axis direction of disk is arranged on estimating disk 1,
The radius ruler 3 that is arranged in the rotary shaft 2 for estimating the lower section of disk 1 and perpendicular to rotary shaft 2 and it is fastened on radius straight down
Radius pen 4 on ruler 3, radius pen 4 can be along 3 horizontal anomalous movements of radius ruler;Its manner passes through realization arranged below:In radius ruler
Clip 13 is set on 3, and the side on the top of clip 13 is offered for plugging 3 card slot 14 of radius ruler, and clip 13 passes through card slot 14
Dismountable outside for being sheathed on radius ruler 3 realizes that clip 13 is moved along 3 horizontal direction of radius ruler is movable, in addition in correspondence
The top edge setting of setting reading window 17 on clip 13 at 3 graduation mark of radius ruler, reading window 17 is used for location radii ruler 3
The indicateing arm of graduation mark so can intuitively and accurately set radius length, then in clip 13 when in use
Lower section is arranged to install the accommodating cavity of radius pen 4, corresponding to being provided with first on 13 side wall of clip of the accommodating cavity
Fixed knob 15, the first fixed knob 15 fasten the radius pen 4 by the screw perpendicular to 4 direction of radius pen;Card
Hoop 13 top be equipped with the second fixed knob 16, the second fixed knob 16 by the screw perpendicular to 3 direction of radius ruler with
Fastening clamp 13;
Positioning region includes and estimates the lower fixed ring 5 of the coaxial arrangement of disk 1, the A columns 6 being vertically arranged and be vertically arranged
The lower end of B columns 7, A columns 6 and B columns 7 is relatively fixed respectively on the circumferential edges of lower fixed ring 5, and A columns 6 and B are vertical
The upper end of column 7 is relatively fixed respectively on the circumferential edges for estimating disk 1.
The compasses of the present invention are different from traditional compasses structure;First present invention improves over the fixed form of traditional compasses,
It is fixed using the positioning region being made of lower fixed ring 5, A columns 6 and B columns 7, due to lower fixed ring 5 and paper or desktop
It is contacted for face, for needle point fixation, contact area bigger, fixation is more firm, therefore will not be to paper or desktop etc.
It damages, compasses will not be made to occur to slide because of reasons such as the breakages of paper and then influences the precision drawn, while also keeping away
Exempt to security risk caused by operator;In addition invention increases the settings of radius ruler 3, while by radius pen 4 with can
Mode along 3 horizontal anomalous movement of radius ruler is fastened on straight down on radius ruler 3, can not only draw out the circle or circle of arbitrary radius
Arc, and can determine the radius size of circle or circular arc, further increase the precision of the present invention;
When in use, can the compasses of the present invention be directly placed on paper etc. to draw in plane, compresses lower fixed ring
5, rotary shaft 2 or the radius ruler being connected with rotary shaft 23 are then stirred, round or circular arc, the circle drawn can be drawn out
Or the radius of circular arc can be determined by the scale on the radius ruler 3 corresponding to radius pen 4, draw different radii circle or
Level stirs the size that radius pen 4 adjusts radius when circular arc.
As shown in Figure 1, in order to can determine that the radian of drawn circular arc, and be further simplified the operation of the present invention, make its
It is more convenient when use, rotary shaft 2 is estimated by being arranged to be threaded through in the bearing estimated on 1 axle center of disk on disk 1,
And swingle 8 is being set in the rotary shaft 2 estimated above disk 1, swingle 8 is parallel to radius ruler 3, while in swingle 8
Upper setting telltale mark, telltale mark can mark the number of rotation of the radius pen 4 with the rotation of the swingle 8.Swingle 8
Setting make the present invention not only operation be flexible, but also the good precision of effect of mapping is high, additionally it is possible to improve the working efficiency of user
With operation enjoyment.
As shown in Fig. 2, in order to enable the invention saves time and labor and mapping effect it is more accurate, compasses are set as electronic
Make chart-pattern, slowspeed machine 9 and control handle 10 are set specially on estimating disk, the output shaft of slowspeed machine 9, which is located at, to be estimated
The shaft core position of disk 1, rotary shaft 2 are fixedly connected with the output shaft of slowspeed machine 9, and power supply is provided in rotary shaft 2 (not in figure
Show), for slowspeed machine 9 with control handle 10 by power electric connection, control handle 10 controls the number of rotation of the output shaft.
So set, the gear on direct adjusting control knob 10 can draw the circular arc of different radians when in use, not only time saving province
Power and mapping effect it is more accurate.
In view of in drawing course it needs to be determined that the center of circle, the present invention sets rotary shaft 2 to hollow-core construction, and is rotating
The lower end installation center of circle pen 12 of axis 2 is to realize positioning and the mark in the center of circle, and center of circle pen 12 is different from needle point, will not destroy paper
Or desktop and other items, user will not be scratched.
In order to further increase the convenience that the present invention uses, in the lower end of rotary shaft 2, installation laser infrared lamp 11, swashs
With control handle 10 by power electric connection, control handle 10 controls the keying of laser infrared lamp 11 and controls defeated light infrared lamp 11
The number of rotation of shaft, startup power supply when in use, laser infrared lamp 11 can the place's of transmitting point light source can be used as determining the center of circle
Label.
In order to keep compasses easy to carry and store, by the both ends of A columns 6 respectively with estimate disk 1 and lower fixed ring 5 is hinged, B
The both ends of column 7 also respectively with to estimate disk 1 and lower fixed ring 5 hinged, it is when compasses need not be used, A columns and B columns is equal
It is rotated to same direction, until estimating 5 overlap-like state of disk 1 and lower fixed ring, thus reduces the volume of compasses, make it easy to
It carries and stores.
In order to meet while the needs of draw multiple concentric circles, the clip 13 is set as 1-3.In use,
Each clip can be separately fixed at according to the size of radius size on the radius ruler of corresponding position, then respectively in each clip
Lower part install pencil, it is time saving and energy saving the needs of can meeting while draw multiple concentric circles when rotating shaft.
The fixed function for descending fixed ring 5 in order to further increase increases its precision of mapping, is arranged in the bottom surface of lower fixed ring
Non-slip mat (is not shown).
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of compasses, which is characterized in that including drawing portion and the positioning region for being used to support and fixing the drawing portion;
The drawing portion includes estimating disk (1), estimating the setting of disk (1) axis direction in the rotation estimated on disk (1) along described
Shaft (2), in the rotary shaft (2) estimated below disk (1) and the radius ruler that is arranged perpendicular to the rotary shaft (2)
(3) and straight down the radius pen (4) being fastened on the radius ruler (3), the radius pen (4) can be along the radius ruler
(3) it moves horizontally;
The positioning region include with the lower fixed ring (5) for estimating disk (1) coaxial arrangement, the A columns (6) that are vertically arranged and
The lower end of the B columns (7) being vertically arranged, the A columns (6) and the B columns (7) is relatively fixed in articulated manner respectively
On the circumferential edges of the lower fixed ring (5), the upper end of the A columns (6) and the B columns (7) is respectively with hinged side
Formula is relatively fixed on the circumferential edges for estimating disk (1).
2. compasses according to claim 1, which is characterized in that the rotary shaft (2) estimates disk (1) by being arranged described
Bearing on axle center is estimated described in being threaded through on disk (1), and rotation is provided in the rotary shaft (2) estimated above disk (1)
Bull stick (8), the swingle (8) is parallel to the radius ruler (3), telltale mark is provided on the swingle (8), described fixed
Position label marks the number of rotation of the radius pen (4) with the rotation of the swingle (8).
3. compasses according to claim 1, which is characterized in that it is described estimate be provided on disk (1) slowspeed machine (9) and control
Knob (10) processed, the output shaft of the slowspeed machine (9) are located at the shaft core position for estimating disk (1), the rotary shaft (2) with
The output shaft of the slowspeed machine (9) is fixedly connected, and power supply, the slowspeed machine (9) and institute are provided in the rotary shaft (2)
Control handle (10) is stated by the power electric connection, the control handle (10) controls the number of rotation of the output shaft.
4. compasses according to claim 3, which is characterized in that the lower end of the rotary shaft (2) is equipped with laser infrared lamp
(11), the laser infrared lamp (11) passes through the power electric connection, the control handle (10) with the control handle (10)
It controls the keying of the laser infrared lamp (11) and controls the number of rotation of the output shaft.
5. compasses according to claim 2 or 3, which is characterized in that the rotary shaft (2) is hollow-core construction, the rotation
The lower end of axis (2) is equipped with to mark the center of circle pen (12) of center location.
6. compasses according to claim 1, which is characterized in that being provided on the radius ruler (3) can be along the radius ruler
(3) side of the clip (13) of horizontal movement, clip (13) top is installed with the card for plugging the radius ruler (3)
Slot (14), the clip (13) are removably sheathed on the outside of the radius ruler (3) by the card slot (14), it is corresponding described in
Reading window (17) is provided on clip (13) at radius ruler (3) graduation mark, the edge of the reading window (17) is provided with
Indicateing arm for positioning the radius ruler (3) graduation mark is provided with to install the radius below the clip (13)
The accommodating cavity of pen corresponds to and is provided with the first fixed knob (15) on clip (13) side wall of the accommodating cavity, and described first
Fixed knob (15) is by the screw perpendicular to radius pen (4) direction to fasten the radius pen (4).
7. compasses according to claim 6, which is characterized in that the top of the clip (13) is additionally provided with the second fixed knob
(16), second fixed knob (16) by the screw perpendicular to the radius ruler (3) direction to fasten the clip
(13)。
8. compasses according to claim 7, which is characterized in that clip (13) setting 1-3.
9. compasses according to claim 8, which is characterized in that the bottom surface of the lower fixed ring (5) is provided with non-slip mat.
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CN201710138477.XA CN106864114B (en) | 2017-03-09 | 2017-03-09 | A kind of compasses |
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CN201710138477.XA CN106864114B (en) | 2017-03-09 | 2017-03-09 | A kind of compasses |
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CN106864114A CN106864114A (en) | 2017-06-20 |
CN106864114B true CN106864114B (en) | 2018-10-16 |
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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107460815A (en) * | 2017-09-15 | 2017-12-12 | 葛均远 | One kind rotates quick sanding instrument |
CN110450566A (en) * | 2019-08-20 | 2019-11-15 | 叶成香 | A kind of math teaching aid facilitating drawing |
CN114074335A (en) * | 2020-08-21 | 2022-02-22 | 拓乾自动化装备(上海)有限公司 | Robot tail end structure for machining precise small circle and using method thereof |
CN113895170A (en) * | 2021-11-23 | 2022-01-07 | 浙江理工大学 | Electronic compasses |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE4007245C2 (en) * | 1990-03-08 | 1999-10-14 | Leica Geosystems Ag | Device for centering a geodetic instrument over a defined point on the ground |
CN201009595Y (en) * | 2007-03-14 | 2008-01-23 | 缪家栋 | Novel compasses ruler |
CN103144470A (en) * | 2013-03-05 | 2013-06-12 | 东华理工大学 | Laser positioning compass |
CN203792984U (en) * | 2014-04-30 | 2014-08-27 | 赵光磊 | Compass for mathematic teaching |
CN205416880U (en) * | 2015-10-26 | 2016-08-03 | 燕山大学里仁学院 | Novel simple and convenient easily fixable's blackboard compasses for teaching |
CN205112767U (en) * | 2015-11-14 | 2016-03-30 | 李琅琅 | Sucking disc compasses of can feeling relieved |
CN205292034U (en) * | 2015-12-21 | 2016-06-08 | 山东科技大学 | Novel compasses |
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