CN109130626A - A kind of teaching compass ruler - Google Patents
A kind of teaching compass ruler Download PDFInfo
- Publication number
- CN109130626A CN109130626A CN201811261161.0A CN201811261161A CN109130626A CN 109130626 A CN109130626 A CN 109130626A CN 201811261161 A CN201811261161 A CN 201811261161A CN 109130626 A CN109130626 A CN 109130626A
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- China
- Prior art keywords
- center
- circle
- scale
- telescoping tube
- wall
- 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.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000003032 molecular docking Methods 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003292 glue Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- 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
-
- 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
- B43L9/16—Features common to compasses, dividers, and callipers
- B43L9/24—Means for mounting points or writing appliances on legs
-
- 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
- B43L9/16—Features common to compasses, dividers, and callipers
- B43L9/24—Means for mounting points or writing appliances on legs
- B43L9/245—Means for mounting points or writing appliances on legs for mounting centering elements
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The present invention provides a kind of teaching compass ruler, including the first scale, the second scale and center of circle positioning mechanism, one end of first scale and one end of the second scale are hinged, first scale has the first link block far from one end joggle of the second scale, the surface of first link block is in rounded shape, first link block has clamping bar far from one end joggle of the first scale, and the surface of the first clamping bar is socketed with fixed ring, is related to education sector.The teaching compass ruler is when in use, the position in the center of circle required for first being drawn on blackboard using chalk, find and fix the position of center of circle positioning mechanism accurately by center of circle positioning mechanism, then end and the docking of center of circle positioning mechanism will be positioned, then start picture circle, achieved the effect that can to find accurately center of circle stable position and drawn circle, so that the current teaching compass ruler of effective solution is not easy to be stabilized on blackboard when in use, the problem of center of circle is easy sliding when picture, is easy to appear error.
Description
Technical field
The present invention relates to field of Educational Technology, specially a kind of teaching compass ruler.
Background technique
Compasses are a kind of common teaching aids, be often used as picture circle, draw arc etc., compasses type can also be divided into teaching and use
It is smaller with the compasses of student, student, it is easy to carry, it is primarily directed to compasses for teaching here.
The compasses of teaching are the tools for needing to map on blackboard, compasses for teaching needed when blackboard is drawn by
One section is stabilized on blackboard and just can be used, and the method one of which of firm compasses is directly to plug gold in one end of scale at present
Belong to nail, in use, carrying out picture circle on blackboard with nail thorn, the meeting of use for a long time is so that the ground of many recess occurs in blackboard
Side, causes the damage of blackboard, is exactly that one end of scale is rectangular by one still an alternative is that being fixed by magnet
Magnetic patch fix the center of circle, this mode can draw circle, but there are very big drawback, first, magnetic patch needs certain area
Just difficult to slide, the shape of magnetic patch is just not easy to find the center of circle accurately, and it is made of adsorbable material that the absorption of the second magnetic patch, which needs blackboard,
Third magnetic patch is not easy to remove from blackboard after, and current teaching compass ruler is not easy to be stabilized in blackboard when in use
On, the center of circle is easy sliding when picture, error is easy to appear, so needing a kind of teaching compass ruler.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of teaching compass rulers, solve current teaching circle
The problem of scale is not easy to be stabilized on blackboard when in use, and the center of circle is easy sliding when picture, is easy to appear error.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of teaching compass ruler, including the
One scale, the second scale and center of circle positioning mechanism, one end of first scale and one end of the second scale are hinged, and described first
Scale has the first link block far from one end joggle of the second scale, and the surface of first link block is in rounded shape, and described first
Link block has clamping bar far from one end joggle of the first scale, and the surface of first clamping bar is socketed with fixed ring, described solid
The surface of the inner wall and clamping bar of determining ring is slidably connected, and second scale has the second connection far from one end joggle of the first scale
The surface of block, second link block is in rounded shape, and second link block has positioning end far from a face joggle of the first scale
The inside of head, the positioning end is inlaid with the first magnetic bead, and first magnetic bead is located at the center of positioning end.
Preferably, the surface of first scale and the second scale is provided with scale, first scale and the second rule
The material of ruler includes timber, and one end that first scale and the second scale mutually join is arc-shaped shape, and scale can make
Compasses combined with ruler is also used as ruler measurement when drawing circle and uses.
Preferably, the quantity of the clamping bar is three, and three clamping bars are with the center on the first link block surface
The center of circle is circumferentially distributed, and the material of three clamping bars includes timber, and three clamping bars can be bent to a certain degree,
With certain toughness, chalk is connected between three clamping bars.
Preferably, the positioning end is arc-shaped shape, the table of first magnetic bead far from one end of the second link block
The rounded shape in face.
Preferably, the center of circle positioning mechanism includes rubber suction cups, and the material of the rubber suction cups includes transparent rubber, institute
The surface for stating rubber suction cups is bonded with center of circle locating piece, and the center of circle locating piece is located at the top center of rubber suction cups, thoroughly
Rubber suction cups made of bright rubber facilitates observation when adsorbing fixed, will not hinder the position for observing the center of circle.
Preferably, the surface of the center of circle locating piece offers center of circle location hole, and the center of circle location hole is fixed positioned at the center of circle
The center of position block, the inner wall of the center of circle location hole slidably connect the first telescoping tube, the inner wall of first telescoping tube
The second telescoping tube is slidably connected, the surface of flexible second telescoping tube is fixedly connected with the first spring, and first spring is separate
One end of second telescoping tube is fixedly connected with the inner wall of the first telescoping tube, and the inner wall of first telescoping tube offers limiting slot,
The inner wall of the limiting slot slidably connects sliding block, and the surface of the sliding block is fixedly connected with the surface of the second telescoping tube.
Preferably, the inner wall of second telescoping tube slidably connects Telescopic positioning lever, the surface of the Telescopic positioning lever
It is fixedly connected with second spring, the fixed company of the inner wall of the one end of the second spring far from Telescopic positioning lever and the second telescoping tube
It connects, the inner wall of second telescoping tube offers limiting slot, and the inner wall of the limiting slot slidably connects sliding block, the sliding block
Surface is fixedly connected with the surface of Telescopic positioning lever, and the surface of the Telescopic positioning lever is bonded with arc rubber pad, limiting slot and
Limited block can be accurately aimed to avoid the landing of the second telescoping tube and Telescopic positioning lever, arc one end of arc rubber pad
The center of circle, while certain anti-skidding effect is also functioned to, it can also be to avoid damage blackboard.
Preferably, the inner wall of the center of circle location hole is bonded with gasket, and the surface of first telescoping tube offers
One end of one venthole, first venthole is connected to the inside of rubber suction cups, the surface of the center of circle locating piece and sealing
The surface of pad offers the second venthole, and one end of second venthole is connected to outside.
Preferably, the surface of first telescoping tube is fixedly connected with docking end, and the docking end is fixed positioned at the center of circle
The upper surface of the center of position block, the docking end offers arc groove, and the inner wall of the arc groove is inlaid with the second magnetic
Power pearl, second magnetic bead are located at the center of arc groove inner wall, the rounded shape in surface of second magnetic bead, institute
State that the first magnetic bead is different with the second magnetic bead magnetism, the lower surface of the docking end is inlaid with ball, the table of the ball
Face is connect with the upper surface slide of center of circle locating piece.
(3) beneficial effect
(1) in the use of the present invention, the position in the center of circle required for first being drawn on blackboard using chalk, fixed by the center of circle
Position mechanism finds accurately and fixes the position of center of circle positioning mechanism, then will position end and the docking of center of circle positioning mechanism, and then open
Beginning picture circle, center of circle stable position can be found accurately by, which having achieved the effect that, draws circle.
(2) present invention is by setting center of circle positioning mechanism, and first rotation docking end, butt end head drive first when in use
Telescoping tube rotation, the rotation of the first telescoping tube drive the rotation of the first venthole, and the first venthole is separated with the second venthole, gasket
It blocks, then the center location drawn on the arc rubber pad and blackboard of protrusion is docked, then press center of circle locating piece, the center of circle
Locating piece presses rubber suction cups, and rubber suction cups is adsorbed on blackboard, has reached the contact alignment center of circle, improves picture circle accuracy
Effect, while the center of circle of picture circle can be consolidated with negative-pressure adsorption.
(3) need will be more than the positioning mechanism of the center of circle when blackboard separation by the present invention, it is only necessary to rotate center of circle locating piece, first is led to
Stomata touches the second venthole, and extraneous gas enters the inside of rubber suction cups by the second venthole and the first venthole,
Center of circle positioning mechanism can be easily taken down, has been achieved the effect that convenient for separating sucker.
(4) present invention is by the first spring of setting and second spring, in a first aspect, the first spring and second spring can stretch
Contracting, shrinks back Telescopic positioning lever and the second telescoping tube, will not influence rubber suction cups and be adsorbed on blackboard, second party
Face, the first spring and second spring can pass to the contact of one opposite force of hand when hand squeezes center of circle positioning mechanism
Sense facilitates the control alignment center of circle.
(5) for the present invention by setting Telescopic positioning lever, on the one hand Telescopic positioning lever can pass to hand contact sense, another
The Telescopic positioning lever of aspect protrusion can be convenient user's observation and the alignment center of circle.
(6) present invention is by the second magnetic bead of setting, and on the one hand the second magnetic bead is docked with positioning end, can be to avoid fixed
Position end skids off center of circle positioning mechanism, while the first magnetic bead and the second magnetic bead attract each other, compasses can be with flexible rotating
While it is also ensured that the center of circle be aligned.
(7) center that the present invention is located at center of circle locating piece by the way that center of circle location hole is arranged, the unique rubber of center of circle locating piece
The center of glue sucker, docking end are located at the center of center of circle locating piece, and the second magnetic bead is located at the center of arc groove
Position, so that it is always consistent to draw the center of circle that the bowlder center of circle that is aligned of positioning end and center of circle positioning mechanism are fixed, from
And the current teaching compass ruler of effective solution is not easy to be stabilized on blackboard when in use, the center of circle is easy to slide when picture
The problem of moving, being easy to appear error.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is positioning mechanism cross-sectional view in the center of circle of the present invention；
Fig. 3 is the first connecting block structure bottom view of the invention；
Fig. 4 is rubber suction cups structure top view of the present invention.
Wherein, 1 first scale, 2 second scales, 3 center of circle positioning mechanisms, 301 rubber suction cups, 302 center of circle locating pieces, 303
Center of circle location hole, 304 first telescoping tubes, 305 second telescoping tubes, 306 first springs, 307 Telescopic positioning levers, 308 second springs,
309 arc rubber pads, 3010 gaskets, 3,011 first ventholes, 3,012 second ventholes, 3013 docking ends, 3014 arcs
Slot, 3,015 second magnetic beads, 4 first link blocks, 5 clamping bars, 6 fixed rings, 7 second link blocks, 8 positioning ends, 9 first magnetic force
Pearl.
Specific embodiment
Below in conjunction with attached drawing of the invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
As shown in Figs 1-4, the embodiment of the present invention provides a kind of teaching compass ruler, including the first scale 1, the second scale 2
With center of circle positioning mechanism 3, the surface of the first scale 1 and the second scale 2 is provided with scale, the first scale 1 and the second scale 2
Material includes timber, and one end that the first scale 1 and the second scale 2 mutually join is arc-shaped shape, one end of the first scale 1 and the
One end of two scales 2 is hinged, and the first scale 1 has the first link block 4 far from one end joggle of the second scale 2, the first link block 4
Surface is in rounded shape, and the first link block 4 has clamping bar 5 far from one end joggle of the first scale 1, and the quantity of clamping bar 5 is three,
Three clamping bars 5 are circumferentially distributed using the center on 4 surface of the first link block as the center of circle, are connected with chalk between three clamping bars 5,
The surface of first clamping bar 5 is socketed with fixed ring 6, and the surface of the inner wall and clamping bar 5 of fixed ring 6 is slidably connected, the second scale 2
One end joggle far from the first scale 1 has the second link block 7, and the surface of the second link block 7 is in rounded shape, and the second link block 7 is remote
A face joggle from the first scale 1 has positioning end 8, and the inside of positioning end 8 is inlaid with the first magnetic bead 9, and positioning end 8 is remote
One end from the second link block 7 is arc-shaped shape, the rounded shape in surface of the first magnetic bead 9, and the first magnetic bead 9 is located at positioning
The center of end 8, center of circle positioning mechanism 3 include rubber suction cups 301, and the material of rubber suction cups 301 includes transparent rubber, rubber
The surface of glue sucker 301 is bonded with center of circle locating piece 302, and center of circle locating piece 302 is located at the top center position of rubber suction cups 301
It sets, the surface of center of circle locating piece 302 offers center of circle location hole 303, and center of circle location hole 303 is located in center of circle locating piece 302
Heart position, the inner wall of center of circle location hole 303 slidably connect the first telescoping tube 304, and the inner wall of the first telescoping tube 304 is slidably connected
There is the second telescoping tube 305, the surface of flexible second telescoping tube 305 is fixedly connected with the first spring 306, and the first spring 306 is separate
One end of second telescoping tube 305 is fixedly connected with the inner wall of the first telescoping tube 304, and the inner wall of the first telescoping tube 304 opens up limited
Position slot, the inner wall of limiting slot slidably connect sliding block, and the surface of sliding block is fixedly connected with the surface of the second telescoping tube 305, and second
The inner wall of telescoping tube 305 slidably connects Telescopic positioning lever 307, and the surface of Telescopic positioning lever 307 is fixedly connected with second spring
308, the one end of second spring 308 far from Telescopic positioning lever 307 is fixedly connected with the inner wall of the second telescoping tube 305, and second is flexible
The inner wall of pipe 305 offers limiting slot, and the inner wall of limiting slot slidably connects sliding block, the surface of sliding block and Telescopic positioning lever 307
Surface be fixedly connected, the surface of Telescopic positioning lever 307 is bonded with arc rubber pad 309, the inner wall bonding of center of circle location hole 303
There is gasket 3010, the surface of the first telescoping tube 304 offers the first venthole 3011, one end of the first venthole 3011 and rubber
The inside of glue sucker 301 is connected to, and the surface of center of circle locating piece 302 and the surface of gasket 3010 offer the second venthole
3012, one end of the second venthole 3012 is connected to outside, and the surface of the first telescoping tube 304 is fixedly connected with docking end
3013, docking end 3013 is located at the center of center of circle locating piece 302, and the upper surface of docking end 3013 offers arc groove
3014, the inner wall of arc groove 3014 is inlaid with the second magnetic bead 3015, and the second magnetic bead 3015 is located at 3014 inner wall of arc groove
Center, the rounded shape in surface of the second magnetic bead 3015, the first magnetic bead 9 is magnetic different with the second magnetic bead 3015,
The lower surface of docking end 3013 is inlaid with ball, and the surface of ball is connect with the upper surface slide of center of circle locating piece 302.
In use, when in use, sliding fixed ring 6 to close to the first link block 4, breaking clamping bar 5 into two with one's hands, chalk is inserted into
Between three clamping bars 5, fixed ring 6 is then slided on clamping bar 5 and fixes chalk, required for then being drawn using chalk
Circular position, then in individually operated center of circle positioning mechanism 3, first rotation docking end 3013, docking end 3013 is driven
The rotation of first telescoping tube 304, the rotation of the first telescoping tube 304 drive the rotation of the first venthole 3011, the first venthole 3011 and the
The separation of two ventholes 3012, gasket 3010 block, then the center of circle position that will be drawn on the arc rubber pad 309 of protrusion and blackboard
Docking is set, center of circle locating piece 302 is then pressed, center of circle locating piece 302 presses rubber suction cups 301, and rubber suction cups 301 is adsorbed on black
On plate, positioning end 8 is docked with arc groove 3014 again later, the first magnetic bead 9 attracts each other with the second magnetic bead 3015, so
Chalk contacts blackboard afterwards, starts picture circle, after the completion of drawing circle, positioning end 8 is separated with arc groove 3014, rotates center of circle locating piece
302, the first venthole 3011 is touched into the second venthole 3012, extraneous gas passes through the second venthole 3012 and the first ventilation
Hole 3011 enters the inside of rubber suction cups 301, and center of circle positioning mechanism 3 is removed from blackboard, so as to complete entire teaching
With the use process of compasses combined with ruler.
Claims (9)
1. a kind of teaching compass ruler, including the first scale (1), the second scale (2) and center of circle positioning mechanism (3), feature exists
In: one end of first scale (1) and one end of the second scale (2) are hinged, and first scale (1) is far from the second scale
(2) one end joggle has the first link block (4), and the surface of first link block (4) is in rounded shape, first link block
(4) one end joggle far from the first scale (1) has clamping bar (5), and the surface of first clamping bar (5) is socketed with fixed ring
(6), the surface of the inner wall and clamping bar (5) of the fixed ring (6) is slidably connected, and second scale (2) is far from the first scale
(1) one end joggle has the second link block (7), and the surface of second link block (7) is in rounded shape, second link block
(7) the face joggle far from the first scale (1) has positioning end (8), and the inside of positioning end (8) is inlaid with the first magnetic force
Pearl (9), first magnetic bead (9) are located at the center of positioning end (8).
2. a kind of teaching compass ruler according to claim 1, it is characterised in that: first scale (1) and the second rule
The surface of ruler (2) is provided with scale, and the material of first scale (1) and the second scale (2) includes timber, first rule
One end that ruler (1) and the second scale (2) mutually join is arc-shaped shape.
3. a kind of teaching compass ruler according to claim 1, it is characterised in that: the quantity of the clamping bar (5) is three
A, three clamping bars (5) are circumferentially distributed using the center on the first link block (4) surface as the center of circle, three clamping bars
(5) chalk is connected between.
4. a kind of teaching compass ruler according to claim 1, it is characterised in that: the positioning end (8) is far from second
One end of link block (7) is arc-shaped shape, the rounded shape in surface of first magnetic bead (9).
5. a kind of teaching compass ruler according to claim 1, it is characterised in that: the center of circle positioning mechanism (3) includes
The material of rubber suction cups (301), the rubber suction cups (301) includes transparent rubber, the surface bonding of the rubber suction cups (301)
Have center of circle locating piece (302), the center of circle locating piece (302) is located at the top center of rubber suction cups (301).
6. a kind of teaching compass ruler according to claim 5, it is characterised in that: the table of the center of circle locating piece (302)
Face offers center of circle location hole (303), and the center of circle location hole (303) is located at the center of center of circle locating piece (302), described
The inner wall of center of circle location hole (303) slidably connects the first telescoping tube (304), the inner wall sliding of first telescoping tube (304)
The second telescoping tube (305) are connected with, the surface of flexible second telescoping tube (305) is fixedly connected with the first spring (306), and described the
One spring (306) is fixedly connected far from the one end of the second telescoping tube (305) with the inner wall of the first telescoping tube (304), and described first
The inner wall of telescoping tube (304) offers limiting slot, and the inner wall of the limiting slot slidably connects sliding block, the surface of the sliding block with
The surface of second telescoping tube (305) is fixedly connected.
7. a kind of teaching compass ruler according to claim 6, it is characterised in that: second telescoping tube (305) it is interior
Wall slidably connects Telescopic positioning lever (307), and the surface of the Telescopic positioning lever (307) is fixedly connected with second spring (308),
The second spring (308) is fixedly connected far from the one end of Telescopic positioning lever (307) with the inner wall of the second telescoping tube (305), institute
The inner wall for stating the second telescoping tube (305) offers limiting slot, and the inner wall of the limiting slot slidably connects sliding block, the sliding block
Surface is fixedly connected with the surface of Telescopic positioning lever (307), and the surface of the Telescopic positioning lever (307) is bonded with arc rubber pad
(309)。
8. a kind of teaching compass ruler according to claim 6, it is characterised in that: the center of circle location hole (303) it is interior
Wall is bonded with gasket (3010), and the surface of first telescoping tube (304) offers the first venthole (3011), and described first
One end of venthole (3011) is connected to the inside of rubber suction cups (301), the surface of the center of circle locating piece (302) and gasket
(3010) surface offers the second venthole (3012), and one end of second venthole (3012) is connected to outside.
9. a kind of teaching compass ruler according to claim 6, it is characterised in that: the table of first telescoping tube (304)
Face is fixedly connected with docking end (3013), and docking end (3013) is located at the center of center of circle locating piece (302), institute
The upper surface for stating docking end (3013) offers arc groove (3014), and the inner wall of the arc groove (3014) is inlaid with the second magnetic
Power pearl (3015), second magnetic bead (3015) are located at the center of arc groove (3014) inner wall, second magnetic bead
(3015) the rounded shape in surface, first magnetic bead (9) and magnetic different, the butt end of the second magnetic bead (3015)
The lower surface of head (3013) is inlaid with ball, and the surface of the ball is connect with the upper surface slide of center of circle locating piece (302).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811261161.0A CN109130626B (en) | 2018-10-26 | 2018-10-26 | Compasses ruler for teaching |
| CN202010157186.7A CN111251755B (en) | 2018-10-26 | 2018-10-26 | Teaching compass ruler and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811261161.0A CN109130626B (en) | 2018-10-26 | 2018-10-26 | Compasses ruler for teaching |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010157186.7A Division CN111251755B (en) | 2018-10-26 | 2018-10-26 | Teaching compass ruler and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109130626A true CN109130626A (en) | 2019-01-04 |
| CN109130626B CN109130626B (en) | 2020-05-05 |
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ID=64809970
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811261161.0A Active CN109130626B (en) | 2018-10-26 | 2018-10-26 | Compasses ruler for teaching |
| CN202010157186.7A Active CN111251755B (en) | 2018-10-26 | 2018-10-26 | Teaching compass ruler and use method thereof |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010157186.7A Active CN111251755B (en) | 2018-10-26 | 2018-10-26 | Teaching compass ruler and use method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130626B (en) * | 2018-10-26 | 2020-05-05 | 杭州海特工量具有限公司 | Compasses ruler for teaching |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109130626B (en) | 2020-05-05 |
| CN111251755A (en) | 2020-06-09 |
| CN111251755B (en) | 2021-06-18 |
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