CN112848760A - Compasses for teaching - Google Patents
Compasses for teaching Download PDFInfo
- Publication number
- CN112848760A CN112848760A CN202110097873.9A CN202110097873A CN112848760A CN 112848760 A CN112848760 A CN 112848760A CN 202110097873 A CN202110097873 A CN 202110097873A CN 112848760 A CN112848760 A CN 112848760A
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- Prior art keywords
- rotating
- gear
- driving
- extension
- deflection
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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
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- Drawing Aids And Blackboards (AREA)
Abstract
The invention is suitable for the technical field of teaching aids, and provides a compass for teaching, which comprises: a support portion; a rotating part; an extension portion; a deflection unit; the first driving mechanism is used for driving the rotating part to rotate on the supporting part; the second driving mechanism is used for driving the extension part to slide in the sliding groove so as to enable the extension part to slide out of or slide into the rotating part; the extension part can be limited when the extension part stops sliding; and a transmission mechanism. The compasses disclosed by the invention have the advantages that the design of the compass tip is cancelled, the rotating part rotates on the supporting part, and the supporting part abuts against the blackboard when in use, so that the compasses disclosed by the invention can be stably arranged on the blackboard, the blackboard cannot be damaged, and the problem that the compass tip hurts people does not exist. In addition, the first driving mechanism is arranged to drive the rotating part to rotate on the supporting part, manual rotation of the rotating shaft is not needed, automatic drawing can be performed, and drawn circular lines are continuous and have no defects.
Description
Technical Field
The invention belongs to the technical field of teaching aids, and particularly relates to compasses for teaching.
Background
Compasses are used for drawing circles or strings in mathematics and drawing, and are commonly used for drawing rulers and compasses. The traditional compasses consist of a pen point, a rotating shaft, compass supporting legs, a ruler, a hinge, a pen body, a pen point, a compass tip and a small lug, wherein the lower end of the pen point is inserted and connected with the upper end of the pen body, the lower end of the pen body is in threaded connection with the upper end of the pen point, the parallel and level end of the small lug is welded in the middle of the outer side of the compass supporting legs, and the lower end of the compass supporting legs is clamped and connected with the upper end of the compass. The method is characterized in that: one side of the pen body is pasted and connected on one side of the hinge, the other side of the hinge is pasted and connected in the middle of one end of the ruler, two sides of the upper end of a crack of the pen body are inserted and connected at two ends of the rotating shaft, and the shaft body of the rotating shaft is connected at the upper end of the compass supporting leg in a penetrating and sleeving manner.
The using process is as follows: 1. measuring the distance between two feet of the compasses by using a ruler as a radius; 2. fixing one end with a needle at one place as a circle center; 3. the end with the pencil is rotated for a circle.
The applicant of the present invention has found that the above technical means has at least the following problems:
the blackboard is not suitable for teachers, and the compasses cannot stand firmly due to the fact that the blackboard is a smooth plane, so that drawing is difficult; when drawing, the compasses tip can damage the blackboard; the rotating shaft needs to be rotated manually, because the compass point is often fixed insecure, and the drawing range on the blackboard is large, circles can be drawn only by rotating the rotating shaft for many times, and the drawn circles have cracks or bulges; the compass point is exposed and leaked outside, and people are easily injured.
Disclosure of Invention
The embodiment of the invention aims to provide a pair of compasses for teaching, and aims to solve the problems in the background technology.
The embodiment of the invention is realized in such a way that the compasses for teaching comprise:
a support portion;
a rotating part rotatably provided on the supporting part; a sliding groove is arranged in the rotating part;
the extension part is arranged in the sliding groove in a sliding manner; one end of the extension part is provided with a groove;
the deflection part is rotatably arranged in the groove; the deflection part is provided with a fixing piece for fixing the pen point;
the first driving mechanism is used for driving the rotating part to rotate on the supporting part;
the second driving mechanism is used for driving the extension part to slide in the sliding groove so as to enable the extension part to slide out of or slide into the rotating part; the extension part can be limited when the extension part stops sliding;
the transmission mechanism drives the deflection part to deflect in the groove through the transmission mechanism when the extension part slides in the sliding groove; and when the groove slides out of the rotating part, the transmission mechanism drives the deflection part to deflect to a specified angle.
Preferably, the first drive mechanism includes:
a connecting member fixedly connected to the rotating portion;
the first gear is in transmission connection with the connecting piece;
a second gear engaged with the first gear;
and the motor is used for driving the second gear to rotate.
Preferably, the second driving mechanism includes:
a drive assembly for driving the elongate portion to slide within the chute;
a self-locking assembly; when the driving assembly stops driving the extension part to slide in the sliding groove, the self-locking assembly can limit the extension part through the driving assembly.
Preferably, the driving assembly includes:
the rack is fixedly arranged on one side of the extension part;
a third gear engaged with the rack;
the rotating shaft is arranged on the rotating part in a sliding mode; one end of the rotating shaft is connected with the third gear;
and the rotating part is used for driving the rotating shaft to rotate.
Preferably, the self-locking assembly comprises:
a self-locking switch disposed in the rotating portion; the self-locking switch is arranged on one side of the third gear.
Preferably, the transmission mechanism includes:
and the fourth gear is used for driving the deflection part to deflect in the groove.
An incomplete gear intermittently meshed with the fourth gear;
a spool rotatably disposed within the extension; the winding drum is connected with the incomplete gear;
the coil spring is wound on the winding drum; one end of the coil spring is fixedly arranged in the rotating part.
Preferably, a limiting member is arranged in the groove and used for limiting the deflection part to deflect to a specified angle.
Preferably, a first scale area is arranged on the rotating part, and a second scale area is arranged on the extending part; the scale value of the first scale area is gradually increased along the direction that the extension part slides out of the rotating part, and the scale value of the second scale area is gradually decreased along the direction that the extension part slides into the rotating part; the maximum value of the first scale region is equal to the minimum value of the second scale region.
Preferably, the compass further comprises:
and the rotating part is rotatably arranged between the supporting part and the holding and pressing part.
The compasses for teaching provided by the embodiment of the invention comprise: a support portion; a rotating part rotatably provided on the supporting part; a sliding groove is arranged in the rotating part; the extension part is arranged in the sliding groove in a sliding manner; one end of the extension part is provided with a groove; the deflection part is rotatably arranged in the groove; the deflection part is provided with a fixing piece for fixing the pen point; the first driving mechanism is used for driving the rotating part to rotate on the supporting part; the second driving mechanism is used for driving the extension part to slide in the sliding groove so as to enable the extension part to slide out of or slide into the rotating part; the extension part can be limited when the extension part stops sliding; the transmission mechanism drives the deflection part to deflect in the groove through the transmission mechanism when the extension part slides in the sliding groove; and when the groove slides out of the rotating part, the transmission mechanism drives the deflection part to deflect to a specified angle.
Compared with the prior art, the compasses provided by the invention have the advantages that the design of the compass tip is firstly cancelled, the rotating part rotates on the supporting part, and the supporting part abuts against the blackboard when in use, so that the compasses can be stably arranged on the blackboard, and the blackboard cannot be damaged when in drawing, and the problem that people are injured by the compass tip is avoided. In addition, the first driving mechanism is arranged to drive the rotating part to rotate on the supporting part, manual rotation of the rotating shaft is not needed, automatic drawing can be performed, and drawn circular lines are continuous and have no defects. In addition, the invention can adapt to drawing of circles with different diameters by sliding the extension part in the rotating part, and changes the mode of deflecting the compass supporting leg in the prior art. Meanwhile, when the pen is not used, the pen point can be deflected to the bright groove and then is collected into the rotating part, so that the problem of damage to the pen point is solved.
Drawings
FIG. 1 is a schematic structural view of a compass for teaching according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first driving mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second driving mechanism according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a transmission mechanism provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a deflection portion according to an embodiment of the present invention.
In the drawings: 1. a support portion; 2. a rotating part; 3. a holding and pressing part; 4. an extension portion; 5. a deflection unit; 6. a fixing member; 7. a second gear; 8. a second gear; 9. a connecting member; 10. a chute; 11. a rack; 12. a rotating member; 13. a rotating shaft; 14. a third gear; 15. a self-locking switch; 16. a coil spring; 17. a reel; 18. an incomplete gear; 19. a fourth gear; 20. a limiting member; 21. a strip-shaped groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
As shown in fig. 1, a compass for teaching according to an embodiment of the present invention includes:
a support part 1;
a rotating part 2 rotatably provided on the support part 1; a chute 10 is arranged in the rotating part 2;
an extension 4 slidingly disposed within the chute 10; one end of the extension part 4 is provided with a groove;
the deflection part 5 is rotatably arranged in the groove; the deflection part 5 is provided with a fixing part 6 for fixing the pen point;
a first driving mechanism for driving the rotating part 2 to rotate on the supporting part 1;
a second driving mechanism for driving the extension part 4 to slide in the sliding slot 10, so that the extension part 4 slides out of or slides into the rotating part 2; and can limit the extension 4 when it stops sliding;
a transmission mechanism, when the extension part 4 slides in the sliding groove 10, the extension part 4 drives the deflection part 5 to deflect in the groove through the transmission mechanism; and when the groove slides out of the rotating part 2, the transmission mechanism drives the deflection part 5 to deflect to a specified angle.
In the embodiment of the invention, the length of both ends of the rotating part 2 exceeds the supporting part 1, the exceeding end is used as a drawing end, the other end is used as a handle, the handheld operation is convenient, and different pen points such as chalks, pencils and the like can be arranged on the fixing part 6 according to actual use requirements. When the blackboard eraser is used, the supporting part 1 is abutted to a blackboard, the second driving mechanism is started, the groove extends out of the rotating part 2, meanwhile, the extending part 4 enables the deflection part 5 to deflect in the groove through the transmission mechanism, when the groove slides out of the rotating part 2, the transmission mechanism just drives the deflection part 5 to deflect to be perpendicular to the blackboard, and the pen point on the fixing part 6 is made to contact with the blackboard. At this moment, the extension part 4 is limited to stop sliding, then the first driving mechanism is started, the rotating part 2 is driven to rotate on the supporting part 1 through the first driving mechanism, and the pen point on the fixing part 6 is driven to draw a circle on the blackboard.
When the not circular of equidimension is drawn to needs, only need through the length of the 4 roll-off rotating parts 2 of second actuating mechanism control extension portion, and no matter how long the length of the 4 roll-off rotating parts 2 of extension portion is, as long as behind the recess roll-off rotating parts 2, drive mechanism just can drive deflection portion 5 and deflect to appointed angle, just no longer changes. The deflection angle can be preset according to actual conditions during the manufacture of the compasses, and is generally 90 degrees, so that the deflection part 5 is just vertical to the blackboard after deflection is finished.
Compared with the prior art, the compasses disclosed by the invention firstly cancel the design of the compass tip, and the compasses can be stably arranged on the blackboard by enabling the rotating part 2 to rotate on the supporting part 1 and enabling the supporting part 1 to abut against the blackboard when in use, and the compasses do not damage the blackboard and do not hurt people by the compass tip when in drawing. In addition, the first driving mechanism is arranged to drive the rotating part 2 to rotate on the supporting part 1, the rotating shaft 13 does not need to be manually rotated, automatic drawing can be performed, and drawn circular lines are continuous and have no defects. In addition, the invention can adapt to drawing of circles with different diameters by sliding the extension part 4 in the rotating part 2, and changes the mode of deflecting the compass supporting leg in the prior art. Meanwhile, the pen point can be deflected to the bright groove when the pen is not used, and then the pen point is retracted into the rotating part 2, so that the problem of damage to the pen point is avoided.
The invention is not only suitable for teachers to use, but also can be used as compasses for students by properly reducing the size and changing the manufacturing materials. The compasses used by the students at present have the problem of easily puncturing paper, and the compasses perfectly solve the problem by abutting the supporting part 1 on the paper when in use. The compasses used by students also have the problems that the pen point is exposed and leaked outside, and paper, a writing case and the like are easily polluted when the compasses are not used.
As shown in fig. 2, as a preferred embodiment of the present invention, the first driving mechanism includes:
a connecting member 9 fixedly connected to the rotating portion 2;
the first gear is in transmission connection with the connecting piece 9;
a second gear 78 engaged with the first gear;
and the motor is used for driving the second gear 78 to rotate.
Specifically, in the embodiment of the present invention, the connection member 9 is fixed inside the rotating portion 2. When drawing circularly, drive second gear 78 through the motor and rotate, second gear 78 drives first gear again and rotates, and first gear drives connecting piece 9 again and rotates, because connecting piece 9 fixes the inside at rotating part 2 to it rotates to drive rotating part 2 emergence. When the rotating part 2 rotates, the extension part 4 inside the rotating part is driven to rotate together, and the pen point at one end of the extension part 4 slides on the blackboard to draw a circle.
In the embodiment of the invention, the motor is controlled by the controller, the controller can be arranged in the supporting part 1, and one side of the supporting part 1 can be provided with the control switch.
As a preferred embodiment of the present invention, the second drive mechanism includes:
a drive assembly for driving the extension 4 to slide in the chute 10;
a self-locking assembly; when the driving assembly stops driving the extension portion 4 to slide in the sliding groove 10, the self-locking assembly can limit the extension portion 4 through the driving assembly.
Specifically, after the support 1 abuts on the blackboard, the extension part 4 is driven by the driving assembly to extend out of the rotating part 2, and the extending length is determined according to the size of a circle to be drawn. After the drawing machine stretches out to a specified length, the driving assembly stops driving the extension part 4 to slide in the sliding groove 10, and the self-locking assembly limits the extension part 4 through the driving assembly to prevent the diameter of a circle from changing during drawing.
As shown in fig. 3, as a preferred embodiment of the present invention, the driving assembly includes:
a rack 11 fixedly disposed at one side of the extension 4;
a third gear 14 engaged with the rack 11;
a rotating shaft 13 slidably provided on the rotating portion 2; one end of the rotating shaft 13 is connected with the third gear 14;
and the rotating part 12 is used for driving the rotating shaft 13 to rotate.
Specifically, the rotating portion 2 is provided with a through hole, and the rotating shaft 13 slides and is rotatably disposed in the through hole. After the support part 1 abuts against the blackboard, the rotating shaft 13 is driven to rotate by the rotating part 12, the rotating shaft 13 drives the third gear 14 to rotate, and the third gear 14 drives the rack 11 to linearly displace, so that the extension part 4 slides in and out of the rotating part 2. With the above operations, the diameters of the different circles are determined, or the nib is retracted into the rotary part 2 when not in use.
In the embodiment of the present invention, the rotating member 12 may be a handle manually rotated by a person, or may be a motor, and the motor drives the rotating shaft 13 to rotate.
As shown in fig. 3, as a preferred embodiment of the present invention, the self-locking assembly includes:
a self-locking switch 15 provided in the rotating portion 2; the self-locking switch 15 is disposed at one side of the third gear 14.
Specifically, a connecting shaft is provided between the self-locking switch 15 and the third gear 14. Under the condition that extension portion 4 does not need to be limited, when third gear 14 drives rack 11 to move, after extension portion 4 stretches out to required length from rotating part 2, press and rotate piece 12, make pivot 13 drive third gear 14 and slide downwards, utilize the connecting axle to press down self-locking switch 15, make self-locking switch 15 lock the connecting axle, prevent that third gear 14 from continuing to rotate.
As shown in fig. 4, as a preferred embodiment of the present invention, the transmission mechanism includes:
a fourth gear wheel 19 for driving the deflection portion 5 to deflect in the recess.
A partial gear 18 intermittently meshed with the fourth gear 19;
a reel 17 rotatably arranged within said extension 4; the reel 17 is connected with the incomplete gear 18;
a coil spring 16 wound around the bobbin 17; one end of the coil spring 16 is fixedly disposed in the rotary part 2.
Specifically, the extension portion 4 is provided with a strip-shaped groove 21, and the coil spring 16 is arranged in the strip-shaped groove 21 and fixedly connected with the rotating portion 2. Taking the example that the extension part 4 slides out of the rotating part 2, at this time, the extension part 4 drives the coil spring 16 to extend and wind out of the winding drum 17, the winding drum 17 is driven to rotate in the winding-out process, the winding drum 17 drives the incomplete gear 18 to rotate, when the incomplete gear 18 rotates to be meshed with the fourth gear 19, the fourth gear 19 is driven to rotate, and the fourth gear 19 drives the deflection part 5 to deflect in the groove. When the incomplete gear 18 is rotated out of engagement with the fourth gear 19, the deflection section 5 is just driven to deflect to a specified angle, typically 90 °. At this point, although the coil spring 16 still drives the driving reel 17, the deflector 5 remains in position at this time, since the incomplete gear 18 is disengaged from the fourth gear 19. During the elongation of the elongation 4, the partial gear 18 can only mesh once with the fourth gear 19, i.e. the wrap spring 16 can only drive the drum 17 through one rotation.
After the drawing is finished, the self-locking switch 15 is pressed down, the rotating shaft 13 and the rotating part 12 are bounced, and the self-locking switch 15 is in a non-self-locking state. At this time, the coil spring 16 rebounds and is wound on the winding drum 17 again to drive the winding drum 17 to rotate reversely, the winding drum 17 drives the incomplete gear 18 to rotate reversely, when the incomplete gear 18 rotates to be meshed with the fourth gear 19, the fourth gear 19 is driven to rotate reversely, the fourth gear 19 drives the deflection part 5 to deflect reversely in the groove, and therefore the deflection part 5 is restored into the groove. The coil spring 16 also drives the extension 4 to slide into the rotary part 2 during the reverse rotation of the driving reel 17, so as to recover the nib into the rotary part 2.
As shown in fig. 5, as a preferred embodiment of the present invention, a limiting member 20 is disposed in the groove for limiting the deflection of the deflecting unit 5 to a predetermined angle.
Specifically, in order to avoid that the coil spring 16 drives the winding drum 17 to rotate for too many turns, so that the incomplete gear 18 is meshed with the fourth gear 19 for many times, and the deflection part 5 deflects for too many angles, in the embodiment of the present invention, the limiting member 20 is disposed in the groove, and when the deflection part 5 deflects to the limiting member 20, the deflection part 5 cannot be deflected continuously, so that the deflection part 5 deflects to a specified angle each time.
As a preferred embodiment of the present invention, a first calibration area is provided on the rotating portion 2, and a second calibration area is provided on the extension portion 4; the scale value of the first scale area is gradually increased along the direction that the extension part 4 slides out of the rotating part 2, and the scale value of the second scale area is gradually decreased along the direction that the extension part 4 slides into the rotating part 2; the maximum value of the first scale region is equal to the minimum value of the second scale region.
Specifically, when the compasses in the prior art draw a circle, a ruler is needed to measure the distance between two feet of the compasses as a radius, so that the step is complicated and troublesome, a large amount of time is wasted, and the ruler needs to be additionally configured. Therefore, in order to solve the above problem, the extension portion 4 is provided with scales, when the extension portion 4 slides out of the rotating portion 2, the scale value on the extension portion 4 gradually increases, and the scale value corresponding to the rotating portion 2 is always the actual radius value of the drawn circle. In addition, in order to increase the utility of the present invention, scales are also provided on the rotating portion 2, so that the present invention can be used as a ruler.
As shown in fig. 1, as a preferred embodiment of the present invention, the compass further includes:
and the rotating part 2 is rotatably arranged between the supporting part 1 and the pressing part 3.
Specifically, in order to facilitate the rotation of the rotating portion 2, the supporting portion 1 can be abutted against the blackboard, so the holding portion 3 is added above the rotating portion 2, the rotating portion 2 is rotatably disposed between the supporting portion 1 and the holding portion 3, that is, the rotation of the rotating portion 2 is not affected, and the supporting portion 1 is also abutted against the blackboard when the rotating portion 2 rotates. The specific structure can adopt the following scheme: the rotating part 2 is provided with a rotating shaft, the holding and pressing part 3 is internally provided with a bearing, and the rotating shaft is arranged in the bearing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The compasses for teaching, characterized in that, the compasses include:
a support portion;
a rotating part rotatably provided on the supporting part; a sliding groove is arranged in the rotating part;
the extension part is arranged in the sliding groove in a sliding manner; one end of the extension part is provided with a groove;
the deflection part is rotatably arranged in the groove; the deflection part is provided with a fixing piece for fixing the pen point;
the first driving mechanism is used for driving the rotating part to rotate on the supporting part;
the second driving mechanism is used for driving the extension part to slide in the sliding groove so as to enable the extension part to slide out of or slide into the rotating part; the extension part can be limited when the extension part stops sliding;
the transmission mechanism drives the deflection part to deflect in the groove through the transmission mechanism when the extension part slides in the sliding groove; and when the groove slides out of the rotating part, the transmission mechanism drives the deflection part to deflect to a specified angle.
2. The compass for teaching of claim 1, wherein the first drive mechanism comprises:
a connecting member fixedly connected to the rotating portion;
the first gear is in transmission connection with the connecting piece;
a second gear engaged with the first gear;
and the motor is used for driving the second gear to rotate.
3. The compass for teaching of claim 1, wherein the second drive mechanism comprises:
a drive assembly for driving the elongate portion to slide within the chute;
a self-locking assembly; when the driving assembly stops driving the extension part to slide in the sliding groove, the self-locking assembly can limit the extension part through the driving assembly.
4. The teaching compass according to claim 3, wherein the drive assembly comprises:
the rack is fixedly arranged on one side of the extension part;
a third gear engaged with the rack;
the rotating shaft is arranged on the rotating part in a sliding mode; one end of the rotating shaft is connected with the third gear;
and the rotating part is used for driving the rotating shaft to rotate.
5. The compasses of claim 4, wherein said self-locking assembly comprises:
a self-locking switch disposed in the rotating portion; the self-locking switch is arranged on one side of the third gear.
6. The compass for teaching of claim 1, wherein the transmission mechanism comprises:
the fourth gear is used for driving the deflection part to deflect in the groove;
an incomplete gear intermittently meshed with the fourth gear;
a spool rotatably disposed within the extension; the winding drum is connected with the incomplete gear;
the coil spring is wound on the winding drum; one end of the coil spring is fixedly arranged in the rotating part.
7. The compasses of claim 1, wherein a stop is disposed in said recess for limiting the deflection of said deflection portion to a predetermined angle.
8. The compasses of claim 1, wherein said rotary member has a first graduated area and said extension member has a second graduated area; the scale value of the first scale area is gradually increased along the direction that the extension part slides out of the rotating part, and the scale value of the second scale area is gradually decreased along the direction that the extension part slides into the rotating part; the maximum value of the first scale region is equal to the minimum value of the second scale region.
9. The compass for teaching of claim 1, further comprising:
and the rotating part is rotatably arranged between the supporting part and the holding and pressing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110097873.9A CN112848760A (en) | 2021-01-25 | 2021-01-25 | Compasses for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110097873.9A CN112848760A (en) | 2021-01-25 | 2021-01-25 | Compasses for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112848760A true CN112848760A (en) | 2021-05-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110097873.9A Pending CN112848760A (en) | 2021-01-25 | 2021-01-25 | Compasses for teaching |
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| CN (1) | CN112848760A (en) |
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| CN201015934Y (en) * | 2007-03-15 | 2008-02-06 | 阿布杜克热木·喀迪尔 | Electric compasses |
| CN203557891U (en) * | 2013-10-31 | 2014-04-23 | 浙江工贸职业技术学院 | Teaching compasses facilitating drawing |
| CN203713328U (en) * | 2014-03-03 | 2014-07-16 | 孔祥莲 | Electric compasses for teaching |
| CN103950324A (en) * | 2014-04-30 | 2014-07-30 | 电子科技大学 | Portable four-degree-of-freedom teaching compass |
| CN204472302U (en) * | 2015-01-24 | 2015-07-15 | 酒泉职业技术学院 | A kind of teaching compasses |
| CN204586246U (en) * | 2015-04-03 | 2015-08-26 | 申贝贝 | The Geometric figure drawing compasses that a kind of mathematical education is special |
| CN204936607U (en) * | 2015-09-25 | 2016-01-06 | 徐克成 | Mathematical education electricity consumption animation arc device |
| CN205929926U (en) * | 2016-06-10 | 2017-02-08 | 薛丽红 | Mathematics teaching instrument |
| CN110171236A (en) * | 2018-12-11 | 2019-08-27 | 肇庆学院 | A kind of Portable teaching compasses |
| CN210026821U (en) * | 2019-03-27 | 2020-02-07 | 吉林省清大科博教育科技有限公司 | Mathematics teaching aid |
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2021
- 2021-01-25 CN CN202110097873.9A patent/CN112848760A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201015934Y (en) * | 2007-03-15 | 2008-02-06 | 阿布杜克热木·喀迪尔 | Electric compasses |
| CN203557891U (en) * | 2013-10-31 | 2014-04-23 | 浙江工贸职业技术学院 | Teaching compasses facilitating drawing |
| CN203713328U (en) * | 2014-03-03 | 2014-07-16 | 孔祥莲 | Electric compasses for teaching |
| CN103950324A (en) * | 2014-04-30 | 2014-07-30 | 电子科技大学 | Portable four-degree-of-freedom teaching compass |
| CN204472302U (en) * | 2015-01-24 | 2015-07-15 | 酒泉职业技术学院 | A kind of teaching compasses |
| CN204586246U (en) * | 2015-04-03 | 2015-08-26 | 申贝贝 | The Geometric figure drawing compasses that a kind of mathematical education is special |
| CN204936607U (en) * | 2015-09-25 | 2016-01-06 | 徐克成 | Mathematical education electricity consumption animation arc device |
| CN205929926U (en) * | 2016-06-10 | 2017-02-08 | 薛丽红 | Mathematics teaching instrument |
| CN110171236A (en) * | 2018-12-11 | 2019-08-27 | 肇庆学院 | A kind of Portable teaching compasses |
| CN210026821U (en) * | 2019-03-27 | 2020-02-07 | 吉林省清大科博教育科技有限公司 | Mathematics teaching aid |
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