CN107097569A - One kind teaching picture circle and oval apparatus - Google Patents
One kind teaching picture circle and oval apparatus Download PDFInfo
- Publication number
- CN107097569A CN107097569A CN201710471304.XA CN201710471304A CN107097569A CN 107097569 A CN107097569 A CN 107097569A CN 201710471304 A CN201710471304 A CN 201710471304A CN 107097569 A CN107097569 A CN 107097569A
- Authority
- CN
- China
- Prior art keywords
- oval
- circular
- inner ring
- chalk
- picture circle
- 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.)
- Pending
Links
- 230000000694 effects Effects 0.000 claims abstract description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000252254 Catostomidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002699 waste material Substances 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
- B43L9/04—Beam 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
- B43L11/00—Non-circular-curve-drawing instruments
- B43L11/02—Non-circular-curve-drawing instruments for drawing conic sections
- B43L11/04—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses
-
- 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
- B43L12/00—Means to prevent slippage
-
- 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
Landscapes
- Pivots And Pivotal Connections (AREA)
Abstract
The invention discloses one kind teaching picture circle and oval apparatus, including chalk, chalk is fixed in chalk fixed cylinder, its upper end activity is plugged in the loose slot of cross bar, and the inner of loose slot is fixedly connected with chalk fixed cylinder by stage clip, and cross bar is fixedly mounted on the two ends of support shaft, the bottom of support shaft is fixedly mounted on the inner ring of bearing block, bearing block is arranged on firm banking, and firm banking bottom is provided with sucker, and the side of fixed bottom is fixedly connected with circular inner by connecting rod.Structure of the present invention increases the frictional force between firm banking and blackboard by sucker when in use, press rotating handles, can contact circular inner and blackboard surface, so as to which whole drawing device is movably fixed on blackboard, elliptical slot and circular trough are divided into by two independent regions by connecting shaft, two chalks are located at the opposed two ends in two regions respectively, now hand-held rotating handles, and rotating 180 ° just can complete picture circle or oval.
Description
Technical field
It is specially a kind of teaching picture circle and oval apparatus the present invention relates to educational outfit field.
Background technology
In mathematical education, teacher is needed in blackboard upper drawing circle or ellipse, and drawing round instrument in teaching at present is mostly
Compasses, because the central shaft lower end of compasses is mostly tip portion, easily cause damage to blackboard, while in drawing during circle
Mandrel segment is unstable, and compasses are easily slided, and teacher is usually that manual letter is drawn when drawing oval, and there is presently no correlation
Apparatus, cause math teacher draw circle and it is oval when waste more time, be this it is proposed that a kind of teaching picture circle and oval
Apparatus is used to solve the above problems.
The content of the invention
It is an object of the invention to provide one kind teaching picture circle and oval apparatus, to solve what is proposed in above-mentioned background technology
Problem.
To achieve the above object, the present invention provides following technical scheme：One kind teaching picture circle and oval apparatus, including powder
Pen, the chalk is fixed in chalk fixed cylinder, and the chalk fixed cylinder is L-type structure, and its upper end activity is plugged on cross bar
In loose slot, the inner of the loose slot is fixedly connected with chalk fixed cylinder by stage clip, and the cross bar is fixedly mounted on support shaft
Two ends, the bottom of the support shaft is fixedly mounted on the inner ring of bearing block, and the bearing block is arranged on firm banking, institute
Firm banking bottom is stated provided with sucker, and the side of fixed bottom is fixedly connected with circular inner by connecting rod, it is described circular interior
It is provided with the outside of ring between oval inner ring, and circular inner and oval inner ring and is provided with circular trough, on the outside of the oval inner ring
Elliptical slot, the lateral surface of the circular inner are provided with provided with oval outer shroud, and between oval inner ring and oval outer shroud
Two ends are fixed with connecting shaft respectively, and the connecting shaft, which is sequentially passed through, is fixedly connected with oval inner ring and oval outer shroud, is located at
The front and rear end side surface of oval outer shroud is provided with screw, the screw is connected with bolt, correspondence spiral shell by helicitic texture
The oval inner ring of bolt is provided with movable span.
It is preferred that, loose slot is circular slot structure in the cross bar, and the diameter of the loose slot is equal to the width of stage clip, described
Stage clip is constantly in compressive state, and the extension elongation of chalk fixed cylinder can be adjusted by stage clip.
It is preferred that, the support shaft upper end is fixed with rotating handles.
It is preferred that, the firm banking is cylindrical structure, and the bottom of the sucker is located at the lower section of circular inner bottom,
The support shaft is rotated by bearing block on firm banking.
It is preferred that, the circular inner is cyclic structure, and its interior bore and outer bore are circle.
It is preferred that, the oval inner ring is cyclic structure, and its outer bore is ellipse, and its interior bore is circular configuration,
And the internal diameter of oval inner ring is more than the external diameter of circular inner.
It is preferred that, the oval outer shroud is cyclic structure, and its outer bore and interior bore are ellipse, its interior bore
Size is more than the outer caliber size of oval inner ring.
It is preferred that, elliptical slot and circular trough are divided into two independent regions by the connecting shaft, and two chalks distinguish position
In the opposed two ends in two regions.
It is preferred that, the quantity of the bolt is two groups, and the bolt on the inside of oval outer shroud is provided with arc block, the arc
The inner side face curvature of shape block is equal to the curvature of bore in oval inner ring.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, structure of the present invention increases the frictional force between firm banking and blackboard by sucker when in use, presses rotating handles,
Can contact circular inner and blackboard surface, so that whole drawing device is movably fixed on blackboard, will be ellipse by connecting shaft
Circular trough and circular trough are divided into two independent regions, and two chalks are located at the opposed two ends in two regions respectively, now hand
Rotating handles is held, rotating 180 ° just can complete picture circle or oval；
2nd, when needing regulation picture shape, on the inside of chalk fixed cylinder regulation to arc block, swivel bolt can fix chalk
Cylinder is pushed or is positioned in circular trough or elliptical slot；
3rd, stage clip is constantly in compressive state, by stage clip can adjust chalk fixed cylinder always movable contact in circular trough or ellipse
On circular trough inwall.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is bar structure schematic diagram in the present invention；
Fig. 3 is firm banking attachment structure schematic diagram of the present invention.
In figure：1 oval outer shroud, 21 elliptical slots, 22 circular troughs, 3 oval inner ring, 4 circular inners, 5 connecting shafts, 6
Firm banking, 7 suckers, 8 connecting rods, 9 bolts, 10 screws, 11 bearing blocks, 12 support shafts, 13 cross bars, 14 chalk fixed cylinders, 15
Chalk, 16 rotating handleses, 17 stage clips, 18 movable spans.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1-3 are referred to, the present invention provides a kind of technical scheme：One kind teaching picture circle and oval apparatus, including chalk 15,
Chalk is fixed in chalk fixed cylinder 14, and chalk fixed cylinder 14 is L-type structure, and its upper end activity is plugged on the loose slot of cross bar 13
Interior, the inner of loose slot is fixedly connected with chalk fixed cylinder 14 by stage clip 17, and cross bar 13 is fixedly mounted on the two ends of support shaft 12,
Loose slot is circular slot structure in cross bar 13, and the diameter of the loose slot is equal to the width of stage clip 17, and stage clip 17 is constantly in compression
State, the extension elongation of chalk fixed cylinder 14 can be adjusted by stage clip 17.
The bottom of support shaft 12 is fixedly mounted on the inner ring of bearing block 11, and the upper end of support shaft 12 is fixed with rotating handles
16, by hand-held rotating handles 16, rotating 180 ° just can complete picture circle or oval.
Bearing block 11 is arranged on firm banking 6, and the bottom of firm banking 6 is provided with sucker 7, and firm banking 6 is cylindrical type knot
Structure, the bottom of sucker 7 is located at the lower section of the bottom of circular inner 4, and support shaft 12 is rotated by bearing block 11 on firm banking 6,
Frictional force between firm banking 6 and blackboard is increased by sucker 7, rotating handles 16 is pressed, circular inner 4 and blackboard table can be made
Face is contacted.
And the side of fixed bottom 6 is fixedly connected with circular inner 4 by connecting rod 8, the outside of circular inner 4 is provided with ellipse
Be provided with circular trough 22 between inner ring 3, and circular inner 4 and oval inner ring 3, circular inner 4 is cyclic structure, its interior bore and
Outer bore is circle.
Oval inner ring 3 is cyclic structure, and its outer bore is ellipse, and its interior bore is in circular configuration, and ellipse
The internal diameter of ring 3 is more than the external diameter of circular inner 4.
The oval outside of inner ring 3 is provided between oval outer shroud 1, and oval inner ring 3 and oval outer shroud 1 provided with oval
Shape groove 21, oval outer shroud 1 is cyclic structure, and its outer bore and interior bore are ellipse, and the size of its interior bore is more than ellipse
The outer caliber size of circular inner 3.
The lateral surface two ends of circular inner 4 are fixed with connecting shaft 5 respectively, and connecting shaft 5, which is sequentially passed through, is fixedly connected with ellipse
Elliptical slot 21 and circular trough 22 are divided into two independent regions, two chalks by shape inner ring 3 and oval outer shroud 1, connecting shaft 5
15 are located at the opposed two ends in two regions respectively, and the figure position that wherein connecting shaft 5 is blocked can be by the manual polishing of teacher, greatly
The big time for saving teacher's picture.
It is provided with screw 10, screw 10 and is flexibly connected by helicitic texture positioned at the front and rear end side surface of oval outer shroud 1
There is bolt 9, the oval inner ring 3 of correspondence bolt 9 is provided with movable span 18, and the quantity of bolt 9 is two groups, positioned at oval outer shroud
The bolt 9 of 1 inner side is provided with arc block, and the inner side face curvature of the arc block is equal to the curvature of bore in oval inner ring 3, passed through
Swivel bolt 9, can control the position of the inner arc block of bolt 9, and the arc block is foil structures, when needing to adjust picture shape
During shape, chalk fixed cylinder 14 is adjusted on the inside of arc block, chalk fixed cylinder 14 can be pushed or be positioned over circle by swivel bolt 9
In groove 22 or elliptical slot 21.
Operation principle：Structure of the present invention increases the frictional force between firm banking 6 and blackboard by sucker 7 when in use,
Rotating handles 16 is pressed, can contact circular inner 4 and blackboard surface, so that whole drawing device is movably fixed into blackboard
On, elliptical slot 21 and circular trough 22 are divided into by two independent regions by connecting shaft 5, two chalks 15 are located at two respectively
The opposed two ends in region, now hand-held rotating handles 16, rotating 180 ° just can complete picture circle or oval, be drawn when needing to adjust
During shape, chalk fixed cylinder 14 is adjusted on the inside of arc block, chalk fixed cylinder 14 can be pushed or be positioned over circle by swivel bolt 9
In shape groove 22 or elliptical slot 21, wherein stage clip 17 is constantly in compressive state, and chalk fixed cylinder can be adjusted by stage clip 17
14 always movable contact on circular trough 22 or the inwall of elliptical slot 21.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. one kind teaching picture circle and oval apparatus, including chalk (15), the chalk are fixed in chalk fixed cylinder (14), it is special
Levy and be：The chalk fixed cylinder (14) is L-type structure, and its upper end activity is plugged in the loose slot of cross bar (13), the work
The inner of dynamic groove is fixedly connected with chalk fixed cylinder (14) by stage clip (17), and the cross bar (13) is fixedly mounted on support shaft (12)
Two ends, the bottom of the support shaft (12) is fixedly mounted on the inner ring of bearing block (11), and the bearing block (11) is arranged on
On firm banking (6), firm banking (6) bottom is provided with sucker (7), and the side of fixed bottom (6) passes through connecting rod (8)
It is fixedly connected on the outside of circular inner (4), the circular inner (4) provided with oval inner ring (3), and circular inner (4) and ellipse
It is provided between shape inner ring (3) on the outside of circular trough (22), the oval inner ring (3) provided with oval outer shroud (1), and in ellipse
Elliptical slot (21) is provided between ring (3) and oval outer shroud (1), the lateral surface two ends of the circular inner (4) are fixed respectively
Provided with connecting shaft (5), the connecting shaft (5), which sequentially passes through, is fixedly connected with oval inner ring (3) and oval outer shroud (1), is located at
The front and rear end side surface of oval outer shroud (1) is provided with screw (10), the screw (10) and is connected with by helicitic texture
Bolt (9), the oval inner ring (3) of correspondence bolt (9) is provided with movable span (18).
2. a kind of teaching picture circle according to claim 1 and oval apparatus, it is characterised in that：It is movable in the cross bar (13)
Groove is circular slot structure, and the diameter of the loose slot is equal to the width of stage clip (17), and the stage clip (17) is constantly in compressive state,
The extension elongation of chalk fixed cylinder (14) can be adjusted by stage clip (17).
3. a kind of teaching picture circle according to claim 1 and oval apparatus, it is characterised in that：Support shaft (12) upper end
It is fixed with rotating handles (16).
4. a kind of teaching picture circle according to claim 1 and oval apparatus, it is characterised in that：The firm banking (6) is
Cylindrical structure, the bottom of the sucker (7) is located at the lower section of circular inner (4) bottom, and the support shaft (12) passes through bearing
Seat (11) is rotated on firm banking (6).
5. a kind of teaching picture circle according to claim 1 and oval apparatus, it is characterised in that：The circular inner (4) is
Cyclic structure, its interior bore and outer bore are circle.
6. a kind of teaching picture circle according to claim 1 and oval apparatus, it is characterised in that：The oval inner ring (3)
For cyclic structure, its outer bore is ellipse, and its interior bore is circular configuration, and the internal diameter of oval inner ring (3) is more than circle
The external diameter of inner ring (4).
7. a kind of teaching picture circle according to claim 1 and oval apparatus, it is characterised in that：The oval outer shroud (1)
For cyclic structure, its outer bore and interior bore are ellipse, and the size of its interior bore is more than the outer bore of oval inner ring (3)
Size.
8. a kind of teaching picture circle according to claim 1 and oval apparatus, it is characterised in that：The connecting shaft (5) will be ellipse
Circular trough (21) and circular trough (22) are divided into two independent regions, and it is opposed that two chalks (15) are located at two regions respectively
Two ends.
9. a kind of teaching picture circle according to claim 1 and oval apparatus, it is characterised in that：The quantity of the bolt (9)
For two groups, the bolt (9) on the inside of oval outer shroud (1) is provided with arc block, and the inner side face curvature of the arc block is equal to ellipse
The curvature of circular inner (3) interior bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710471304.XA CN107097569A (en) | 2017-06-20 | 2017-06-20 | One kind teaching picture circle and oval apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710471304.XA CN107097569A (en) | 2017-06-20 | 2017-06-20 | One kind teaching picture circle and oval apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107097569A true CN107097569A (en) | 2017-08-29 |
Family
ID=59664019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710471304.XA Pending CN107097569A (en) | 2017-06-20 | 2017-06-20 | One kind teaching picture circle and oval apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107097569A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112693252A (en) * | 2021-01-29 | 2021-04-23 | 重庆电子工程职业学院 | Mathematics teaching is with supplementary teaching device |
| CN112793339A (en) * | 2021-02-04 | 2021-05-14 | 日照职业技术学院 | Mathematics teaching is with automatic drawing device |
| CN113133622A (en) * | 2021-04-21 | 2021-07-20 | 陈孙豪 | A work of fine arts show shelf for classroom teaching |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567662A (en) * | 1983-08-30 | 1986-02-04 | Peter Wallner | Device for drawing ellipses |
| CN86207966U (en) * | 1986-10-18 | 1987-08-12 | 唐映晖 | Beam compasses centring with suction cup |
| CN2032147U (en) * | 1988-07-07 | 1989-02-08 | 王世武 | Simple ellipse compasses |
| CN2042420U (en) * | 1989-02-01 | 1989-08-09 | 总参谋部炮兵装备技术研究所 | Halving elliptic board |
| CN2850949Y (en) * | 2005-12-08 | 2006-12-27 | 韩芳琦 | Compasses for blackboard |
| CN201619351U (en) * | 2010-03-26 | 2010-11-03 | 刘春荣 | Novel cyclograph |
| CN201721210U (en) * | 2010-04-08 | 2011-01-26 | 莫昌清 | Looped ellipse formwork |
| CN202200740U (en) * | 2011-08-03 | 2012-04-25 | 袁安锋 | Novel compass |
| CN202213388U (en) * | 2011-08-03 | 2012-05-09 | 时琰琰 | Mathematics teaching aid |
| MD428Z (en) * | 2010-02-01 | 2012-05-31 | Ион РАССОХИН | Curve tracing mechanism |
| CN202345177U (en) * | 2011-12-15 | 2012-07-25 | 王庆萍 | Adjustable compass for mathematical teaching |
| CN202847250U (en) * | 2012-09-30 | 2013-04-03 | 王德湘 | Magnetic teaching compasses |
| CN202986529U (en) * | 2013-01-11 | 2013-06-12 | 宁波大学 | Portable compass |
| CN203267577U (en) * | 2013-05-27 | 2013-11-06 | 吴美英 | Oval drawing board for teaching |
| CN203325282U (en) * | 2013-06-03 | 2013-12-04 | 杨新宇 | Elliptical teaching instrument |
| CN203974323U (en) * | 2014-07-25 | 2014-12-03 | 泰山职业技术学院 | A kind of rotation chi for animation design |
| CN205292034U (en) * | 2015-12-21 | 2016-06-08 | 山东科技大学 | Novel compasses |
-
2017
- 2017-06-20 CN CN201710471304.XA patent/CN107097569A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567662A (en) * | 1983-08-30 | 1986-02-04 | Peter Wallner | Device for drawing ellipses |
| CN86207966U (en) * | 1986-10-18 | 1987-08-12 | 唐映晖 | Beam compasses centring with suction cup |
| CN2032147U (en) * | 1988-07-07 | 1989-02-08 | 王世武 | Simple ellipse compasses |
| CN2042420U (en) * | 1989-02-01 | 1989-08-09 | 总参谋部炮兵装备技术研究所 | Halving elliptic board |
| CN2850949Y (en) * | 2005-12-08 | 2006-12-27 | 韩芳琦 | Compasses for blackboard |
| MD428Z (en) * | 2010-02-01 | 2012-05-31 | Ион РАССОХИН | Curve tracing mechanism |
| CN201619351U (en) * | 2010-03-26 | 2010-11-03 | 刘春荣 | Novel cyclograph |
| CN201721210U (en) * | 2010-04-08 | 2011-01-26 | 莫昌清 | Looped ellipse formwork |
| CN202213388U (en) * | 2011-08-03 | 2012-05-09 | 时琰琰 | Mathematics teaching aid |
| CN202200740U (en) * | 2011-08-03 | 2012-04-25 | 袁安锋 | Novel compass |
| CN202345177U (en) * | 2011-12-15 | 2012-07-25 | 王庆萍 | Adjustable compass for mathematical teaching |
| CN202847250U (en) * | 2012-09-30 | 2013-04-03 | 王德湘 | Magnetic teaching compasses |
| CN202986529U (en) * | 2013-01-11 | 2013-06-12 | 宁波大学 | Portable compass |
| CN203267577U (en) * | 2013-05-27 | 2013-11-06 | 吴美英 | Oval drawing board for teaching |
| CN203325282U (en) * | 2013-06-03 | 2013-12-04 | 杨新宇 | Elliptical teaching instrument |
| CN203974323U (en) * | 2014-07-25 | 2014-12-03 | 泰山职业技术学院 | A kind of rotation chi for animation design |
| CN205292034U (en) * | 2015-12-21 | 2016-06-08 | 山东科技大学 | Novel compasses |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112693252A (en) * | 2021-01-29 | 2021-04-23 | 重庆电子工程职业学院 | Mathematics teaching is with supplementary teaching device |
| CN112793339A (en) * | 2021-02-04 | 2021-05-14 | 日照职业技术学院 | Mathematics teaching is with automatic drawing device |
| CN113133622A (en) * | 2021-04-21 | 2021-07-20 | 陈孙豪 | A work of fine arts show shelf for classroom teaching |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107097569A (en) | One kind teaching picture circle and oval apparatus | |
| CN209274218U (en) | A kind of adjustable architectural design drawing board | |
| CN206717443U (en) | Thin wall cylinder parts process expanding support device | |
| CN207535573U (en) | A kind of teaching picture circle and oval apparatus | |
| CN208894899U (en) | A kind of stainless steel tube straightener | |
| CN208894900U (en) | A kind of clipping stainless steel tube straightener | |
| CN107571663B (en) | Adjustable pen holder | |
| CN208498048U (en) | A kind of multi-functional environment-protection pen | |
| CN202319541U (en) | Portable folding type teaching ruler | |
| CN208290792U (en) | Adjustable appliance for holding pen | |
| CN208630188U (en) | A kind of mathematics drawing instruments | |
| CN209320563U (en) | A kind of brush made with fetal hair processing penholder localization machine | |
| CN202439391U (en) | Pen convenient for drawing straight line | |
| CN207825792U (en) | A kind of chart board plotting unit | |
| CN207105940U (en) | A kind of examination paper clamping device for being easy to browse | |
| CN203172274U (en) | Modified compasses | |
| CN208842095U (en) | Drawing Ellipse tool | |
| CN206841005U (en) | A kind of pencil of novel belt ruler | |
| CN201881699U (en) | Special pen for civil engineering drawing | |
| CN206285430U (en) | A kind of arm of force adjustable arm exerciser | |
| CN206242760U (en) | A kind of foreign language teaching chalker | |
| CN207207535U (en) | A kind of chalk sleeve | |
| CN203600829U (en) | Pencil sleeve | |
| CN202130171U (en) | Writing pen | |
| CN106515276B (en) | A kind of Portable intelligent teaching aid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180709 Address after: 274000 Heze University Road in Shandong Province Applicant after: Heze University Address before: 314500 Zhejiang, Jiaxing, Tongxiang city zhouquan town Qu Jia Bang village, No. 19 Applicant before: Qu Leitao |
|
| TA01 | Transfer of patent application right | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20190104 |
|
| AD01 | Patent right deemed abandoned |