CN110816128A - Special drawing device of higher mathematics - Google Patents
Special drawing device of higher mathematics Download PDFInfo
- Publication number
- CN110816128A CN110816128A CN201911141693.5A CN201911141693A CN110816128A CN 110816128 A CN110816128 A CN 110816128A CN 201911141693 A CN201911141693 A CN 201911141693A CN 110816128 A CN110816128 A CN 110816128A
- Authority
- CN
- China
- Prior art keywords
- rod
- sleeve
- mounting rod
- handle
- rods
- 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
Images
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a special drawing device for advanced mathematics, which relates to the technical field of teaching equipment and mainly aims to solve the problem that the existing compasses are inconvenient to use; the novel chalk sleeve drawing device is provided with the two drawing rods, the adjusting screw rods and the movable blocks, the radius of a drawn circle can be adjusted by rotating the adjusting screw rods, the drawing can be completed by rotating the two drawing rods only by 180 degrees, and the positions of the chalk sleeves on the two drawing rods are also different, so that two concentric circles with different radii can be drawn at one time, the convenience and the practicability are realized, the drawing speed is high, and the efficiency is high.
Description
Technical Field
The invention relates to the technical field of teaching equipment, in particular to a special drawing device for advanced mathematics.
Background
The mathematics refers to that objects and methods of mathematics are relatively complicated compared with elementary mathematics, and in a broad sense, mathematics except elementary mathematics are higher mathematics, and algebra, geometry and simple set theory of intermediate school are primarily and logically referred to as intermediate mathematics, which is used as the transition between elementary mathematics in the stage of middle and primary schools and higher mathematics in the stage of university, and the higher mathematics is generally considered to be a basic subject formed by micro-integration, deeper algebra, geometry and cross content among the micro-integration, and the main contents of the basic subject include: limit, calculus, space analytic geometry and linear algebra, series and ordinary differential equation.
The existing special drawing device for advanced mathematics can be used by matching with advanced mathematics. However, in practical use, the compass is single in use effect, generally speaking, when drawing, the compass is driven by hand to rotate at least 360 degrees, so that a complete circle can be drawn, the operation is very inconvenient, the movement of a center point of the circle is easily caused, and only one circle can be drawn at each time.
Disclosure of Invention
The invention aims to provide a special drawing device for advanced mathematics.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a special drawing device of higher mathematics, is including installation pole, handle, drawing pole and chalk cover, installation pole one end is equipped with the handle, the installation pole other end is equipped with the drawing pole, is equipped with the chalk cover on the drawing pole, is equipped with the scale mark on the pole wall of drawing pole, the drawing pole is totally two, the inside cavity of drawing pole and the tip opening of keeping away from the installation pole, be equipped with the movable block in the drawing pole, the movable block part extends to the drawing pole outside and installs the chalk cover, offers the spout that supplies the movable block motion on the pole wall of drawing pole, adjusting screw is worn to be equipped with by the part that the movable block is located the drawing pole, adjusting screw and movable block threaded connection.
On the basis of the technical scheme, the invention also provides the following optional technical scheme:
in one alternative: the handle is rotatably connected with the mounting rod through a bearing, a driving motor is mounted in the handle, and an output shaft of the driving motor is fixedly connected with the mounting rod.
In one alternative: the handle is internally provided with a battery cavity for installing a battery, the outer side wall of the handle is provided with a control button, and the battery, the control button and the driving motor are electrically connected.
In one alternative: two the drawing pole is articulated respectively and is installed on wall of both sides around the installation pole, the outside cover of installation pole is equipped with the sleeve, and sleeve and installation pole clearance fit guarantee that the sleeve slides on the installation pole, all articulate on the wall of sleeve both sides has the connecting rod, and two connecting rod other ends are articulated with two drawing poles respectively, sleeve bottom is equipped with spacing retaining ring on the installation pole, it installs the spring buckle to lie in the sleeve top on the installation pole.
In one alternative: and a sucker is arranged at the bottom end of the mounting rod.
In one alternative: the sucker is rotatably connected with the mounting rod through a bearing.
In one alternative: the sucker is installed on the installation rod through a threaded rod, and the threaded rod is in threaded connection with the installation rod.
Compared with the prior art, the invention has the following beneficial effects:
1. the chalk sleeve is provided with two drawing rods, an adjusting screw rod and a movable block, the adjusting screw rod drives the movable block to move by rotating the adjusting screw rod, the movable block drives the chalk sleeve to move, the radius of a drawn circle is accurately adjusted according to scale marks on the drawing rods, the circle is drawn by the two drawing rods, the chalk sleeve can be rotated by 180 degrees only by the installation rod, the operation is simpler, and two concentric circles with different radiuses can be drawn at one time by enabling the positions of the chalk sleeves on the two drawing rods to be different, so that the chalk sleeve is convenient and practical to use, the drawing speed is high, and the efficiency is high;
2. the chalk sleeve is provided with a driving motor and a control button, the driving motor is started by pressing the control button, the driving motor drives the mounting rod to rotate, the mounting rod drives the painting rod to rotate, the painting rod drives the chalk sleeve to rotate to paint circles, the mounting rod does not need to be driven by hands to rotate, and the center point is prevented from being displaced by manual operation;
3. the drawing rod is driven to be folded through the connecting rod, so that the occupied space of the device is reduced, and the device is convenient to carry and store;
4. be equipped with sucking disc and threaded rod, the sucking disc can make the device adsorb on the blackboard, has improved the stability of device, threaded rod and installation pole threaded connection, when the installation pole rotates, because the effect threaded rod of sucking disc does not rotate to in the drawing, the installation pole can be close to the blackboard gradually, thereby drive the drawing pole and slowly be close to the blackboard gradually, thereby shorten to the chalk wearing and tearing and compensate, just so need not often adjust or change the chalk, it is more convenient to use.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of another embodiment of the present invention.
Notations for reference numerals: 1-mounting rod, 2-spring buckle, 3-sleeve, 4-connecting rod, 5-drawing rod, 6-scale mark, 7-chalk sleeve, 8-sucker, 9-adjusting screw, 10-movable block, 11-rotating rod, 12-driving motor, 13-handle, 14-battery cavity, 15-control button, 16-threaded rod and 17-limit retainer ring.
Detailed Description
The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the several views, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practice. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention. Any obvious modifications or variations can be made to the present invention without departing from the spirit or scope of the present invention.
Example 1
Referring to fig. 1, in the embodiment of the present invention, a drawing device special for advanced mathematics includes an installation rod 1, a handle 13, a drawing rod 5 and a chalk sleeve 7, wherein one end of the installation rod 1 is provided with the handle 13, the handle 13 is rotatably connected with the installation rod 1 through a bearing, a driving motor 12 is installed in the handle 13, an output shaft of the driving motor 12 is fixedly connected with the installation rod 1, a battery cavity 14 for installing a battery is arranged in the handle 13, a control button 15 is installed on an outer side wall of the handle 13, the battery, the control button 15 and the driving motor 12 are electrically connected, the other end of the installation rod 1 is provided with the drawing rod 5, the chalk sleeve 7 is arranged on the drawing rod 5, a scale line 6 is arranged on a rod wall of the drawing rod 5, the number of the drawing rods 5 is two, the two drawing rods 5 are respectively and hingedly installed on front and rear side walls of the installation rod 1, a sleeve 3, the sleeve 3 is in clearance fit with the mounting rod 1 to ensure that the sleeve 3 slides on the mounting rod 1, the two side walls of the sleeve 3 are hinged with the connecting rods 4, the other ends of the two connecting rods 4 are respectively hinged with the two drawing rods 5, the bottom of the sleeve 3 on the mounting rod 1 is provided with the limiting check ring 17 for limiting the position of the sleeve 3 and ensuring that the two drawing rods 5 are kept horizontal, the mounting rod 1 is provided with the spring buckle 2 at the top of the sleeve 3, the spring buckle 2 has the same structure as the spring buckle 2 on an umbrella and is directly applied to the prior art, the description is omitted, when the drawing is omitted, the spring buckle 2 is pressed down to lift the sleeve 3 upwards, the drawing rods 5 are driven by the connecting rods 4 to be folded, the space occupied by the device is reduced, the carrying and the storage are convenient, the bottom end of the mounting rod 1 is provided with the sucker 8, and the sucker 8, the sucking disc 8 has the effects that the device is adsorbed on a blackboard, the stability of the device is improved, the drawing rod 5 is hollow inside and is far away from an end opening of the installation rod 1, a movable block 10 is arranged in the drawing rod 5, part of the movable block 10 extends to the outside of the drawing rod 5 and is provided with a chalk sleeve 7, a sliding groove for the movement of the movable block 10 is formed in the rod wall of the drawing rod 5, an adjusting screw 9 penetrates through the part of the movable block 10 positioned in the drawing rod 5, the adjusting screw 9 is in threaded connection with the movable block 10, a rotating rod 11 is fixed at the end part of the adjusting screw 9, when the device is used, a control button 15 can be pressed down to start a driving motor 12, the driving motor 12 drives the installation rod 1 to rotate, the installation rod 1 drives the drawing rod 5 to rotate, the drawing rod 5 drives the chalk sleeve 7 to rotate to draw a circle, the installation rod 1 does not need to be driven by a hand to rotate, and the displacement of, through rotating adjusting screw 9, adjusting screw 9 drives movable block 10 and removes, movable block 10 drives chalk cover 7 and removes, according to the scale mark 6 on the pole 5 of drawing, thereby the radius of the circle of accurate adjustment, draw a circle through two poles 5 of drawing, only need installation pole 1 to rotate 180 degrees and can accomplish, the operation is simpler, also can be different through making the chalk cover 7 position on two poles 5 of drawing, thereby once draw the different concentric circles of two radiuses, convenience and practicality, it is fast to draw, high efficiency.
Example 2
Referring to fig. 2, the embodiment of the present invention is different from embodiment 1 in that, when drawing, chalk is gradually shortened due to continuous friction with a blackboard, if the distance between the drawing rod 5 and the blackboard is inconvenient, the chalk needs to be frequently adjusted or replaced, in order to solve the above problem, the suction cup 8 is mounted on the mounting rod 1 through the threaded rod 16, the threaded rod 16 is in threaded connection with the mounting rod 1, when the mounting rod 1 rotates, the threaded rod 16 does not rotate due to the action of the suction cup 8, so that the mounting rod 1 gradually approaches the blackboard when drawing, and the drawing rod 5 is driven to gradually approach the blackboard, so as to compensate for the shortened chalk abrasion, so that frequent adjustment or replacement of chalk is not needed, and the use is more convenient.
The working principle of the invention is as follows: when the invention is used, taking embodiment 1 as an example, the control button 15 can be pressed to start the driving motor 12, the driving motor 12 drives the mounting rod 1 to rotate, the mounting rod 1 drives the drawing rod 5 to rotate, the drawing rod 5 drives the chalk sleeve 7 to rotate to draw a circle, the mounting rod 1 does not need to be driven to rotate by hands, the displacement of a center point caused by manual operation is avoided, the adjusting screw 9 drives the movable block 10 to move through rotating the adjusting screw 9, the movable block 10 drives the chalk sleeve 7 to move, the radius of the drawn circle is accurately adjusted according to the scale mark 6 on the drawing rod 5, the circle can be drawn by only rotating the mounting rod 1 by 180 degrees through rotating the two drawing rods 5, the operation is simpler, and two concentric circles with different radiuses can be drawn at one time through making the positions of the chalk sleeves 7 on the two drawing rods 5 different, the invention is convenient and practical, the drawing speed is fast and the efficiency is high, taking embodiment 2 as an example, when drawing, installation pole 1 can be close to the blackboard gradually to drive drawing pole 5 slowly to be close to the blackboard gradually, thereby shorten the chalk wearing and tearing and compensate, just so need not often adjust or change the chalk, it is more convenient to use.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (7)
1. The special drawing device for advanced mathematics comprises an installation rod (1), a handle (13), a drawing rod (5) and a chalk sleeve (7), wherein the handle (13) is arranged at one end of the installation rod (1), the drawing rod (5) is arranged at the other end of the installation rod (1), the chalk sleeve (7) is arranged on the drawing rod (5), and scale marks (6) are arranged on the rod wall of the drawing rod (5), the special drawing device is characterized in that the number of the drawing rods (5) is two, the drawing rod (5) is hollow and is far away from an end opening of the installation rod (1), a movable block (10) is arranged in the drawing rod (5), the movable block (10) partially extends to the outside of the drawing rod (5) and is provided with the chalk sleeve (7), a sliding groove for the movable block (10) to move is formed in the rod wall of the drawing rod (5), and an adjusting screw (9) is arranged on the part of the movable block (10) positioned in the drawing rod (5), the adjusting screw rod (9) is in threaded connection with the movable block (10).
2. The special drawing device for advanced mathematics as claimed in claim 1, wherein said handle (13) is rotatably connected with the mounting rod (1) through a bearing, a driving motor (12) is installed in the handle (13), and the output shaft of the driving motor (12) is fixedly connected with the mounting rod (1).
3. The special drawing device for advanced mathematics as claimed in claim 2, wherein a battery cavity (14) for installing a battery is arranged in the handle (13), a control button (15) is arranged on the outer side wall of the handle (13), and the battery, the control button (15) and the driving motor (12) are electrically connected.
4. The special drawing device for higher mathematics as claimed in any one of claims 1-3, wherein two drawing rods (5) are respectively and hingedly mounted on the front and rear side walls of the mounting rod (1), a sleeve (3) is sleeved outside the mounting rod (1), the sleeve (3) is in clearance fit with the mounting rod (1) to ensure that the sleeve (3) slides on the mounting rod (1), the two side walls of the sleeve (3) are both hinged with connecting rods (4), the other ends of the two connecting rods (4) are respectively and hingedly connected with the two drawing rods (5), a limiting check ring (17) is arranged at the bottom of the sleeve (3) on the mounting rod (1), and a spring buckle (2) is mounted at the top of the sleeve (3) on the mounting rod (1).
5. Special drawing device for advanced mathematics according to claim 4, characterized in that the bottom end of the mounting rod (1) is provided with a suction cup (8).
6. Special drawing device for advanced mathematics according to claim 5, characterized in that said suction cup (8) is rotatably connected to the mounting rod (1) by means of bearings.
7. Special drawing device for advanced mathematics according to claim 5, characterized in that the suction cup (8) is mounted on the mounting rod (1) by means of a threaded rod (16), the threaded rod (16) being in threaded connection with the mounting rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141693.5A CN110816128B (en) | 2019-11-20 | 2019-11-20 | Drawing device special for higher mathematics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141693.5A CN110816128B (en) | 2019-11-20 | 2019-11-20 | Drawing device special for higher mathematics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110816128A true CN110816128A (en) | 2020-02-21 |
| CN110816128B CN110816128B (en) | 2023-08-04 |
Family
ID=69557268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911141693.5A Active CN110816128B (en) | 2019-11-20 | 2019-11-20 | Drawing device special for higher mathematics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110816128B (en) |
Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2674042A (en) * | 1950-03-27 | 1954-04-06 | Ott Hermann | Pantograph |
| CN201291683Y (en) * | 2008-11-12 | 2009-08-19 | 桂观宇 | Novel compasses special for blackboard |
| CN203004798U (en) * | 2013-01-18 | 2013-06-19 | 齐齐哈尔大学 | Teaching aid-compass |
| CN203557891U (en) * | 2013-10-31 | 2014-04-23 | 浙江工贸职业技术学院 | Teaching compasses facilitating drawing |
| CN203666190U (en) * | 2014-01-10 | 2014-06-25 | 潍坊高新技术产业开发区北海学校 | Telescopic concentric circle plotting instrument for mathematics teaching |
| CN104002592A (en) * | 2014-05-22 | 2014-08-27 | 张泽奎 | Novel multifunctional compasses |
| CN203876443U (en) * | 2014-06-18 | 2014-10-15 | 王燕 | Blackboard writing compasses |
| CN203902061U (en) * | 2014-06-19 | 2014-10-29 | 上海市闵行第二中学 | Teaching compasses for conveniently drawing concentric circles |
| CN204432141U (en) * | 2015-02-28 | 2015-07-01 | 莫传华 | One paints round teaching aid automatically |
| CN204749641U (en) * | 2015-05-23 | 2015-11-11 | 杭州华泽医药科技有限公司 | Mathematical education device of drawing |
| CN204774257U (en) * | 2015-05-19 | 2015-11-18 | 杭州华泽医药科技有限公司 | Mathematics device of drawing |
| CN205615215U (en) * | 2016-03-25 | 2016-10-05 | 浙江工业职业技术学院 | Convenient to use's mathematical education compasses |
| CN205818752U (en) * | 2016-03-25 | 2016-12-21 | 浙江工业职业技术学院 | College Mathematics Teaching compass teaching aid |
| CN207207546U (en) * | 2017-04-27 | 2018-04-10 | 杨勇 | Draw circle device |
| CN207449473U (en) * | 2017-06-06 | 2018-06-05 | 张艳锋 | Mathematical education camber line plotting unit |
| CN208069205U (en) * | 2017-08-20 | 2018-11-09 | 杨海林 | A kind of multipurpose horizontal educational compasses with telescopic rod |
| CN208085327U (en) * | 2018-03-16 | 2018-11-13 | 唐春芳 | A kind of multi-functional primary school mathematics teaching ruler |
| CN108973453A (en) * | 2018-06-29 | 2018-12-11 | 王小兰 | A kind of compasses and its application method for blackboard upper drawing circle |
| CN109080336A (en) * | 2018-08-20 | 2018-12-25 | 西安石油大学 | Higher mathematics plotter |
| CN208584986U (en) * | 2018-03-16 | 2019-03-08 | 刘昕宇 | A kind of mathematics displaying device |
| CN208682461U (en) * | 2018-08-09 | 2019-04-02 | 信阳职业技术学院 | Mathematical education camber line plotting unit |
| CN209257730U (en) * | 2018-11-27 | 2019-08-16 | 毕全威 | A kind of multi-functional Higher Mathematics Teaching drawing board |
| CN209486983U (en) * | 2018-08-23 | 2019-10-11 | 云南国土资源职业学院 | Assistant teaching aid is used in a kind of teaching |
| CN209649882U (en) * | 2019-03-12 | 2019-11-19 | 黄河科技学院 | A kind of mathematics drawing instruments |
-
2019
- 2019-11-20 CN CN201911141693.5A patent/CN110816128B/en active Active
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2674042A (en) * | 1950-03-27 | 1954-04-06 | Ott Hermann | Pantograph |
| CN201291683Y (en) * | 2008-11-12 | 2009-08-19 | 桂观宇 | Novel compasses special for blackboard |
| CN203004798U (en) * | 2013-01-18 | 2013-06-19 | 齐齐哈尔大学 | Teaching aid-compass |
| CN203557891U (en) * | 2013-10-31 | 2014-04-23 | 浙江工贸职业技术学院 | Teaching compasses facilitating drawing |
| CN203666190U (en) * | 2014-01-10 | 2014-06-25 | 潍坊高新技术产业开发区北海学校 | Telescopic concentric circle plotting instrument for mathematics teaching |
| CN104002592A (en) * | 2014-05-22 | 2014-08-27 | 张泽奎 | Novel multifunctional compasses |
| CN203876443U (en) * | 2014-06-18 | 2014-10-15 | 王燕 | Blackboard writing compasses |
| CN203902061U (en) * | 2014-06-19 | 2014-10-29 | 上海市闵行第二中学 | Teaching compasses for conveniently drawing concentric circles |
| CN204432141U (en) * | 2015-02-28 | 2015-07-01 | 莫传华 | One paints round teaching aid automatically |
| CN204774257U (en) * | 2015-05-19 | 2015-11-18 | 杭州华泽医药科技有限公司 | Mathematics device of drawing |
| CN204749641U (en) * | 2015-05-23 | 2015-11-11 | 杭州华泽医药科技有限公司 | Mathematical education device of drawing |
| CN205818752U (en) * | 2016-03-25 | 2016-12-21 | 浙江工业职业技术学院 | College Mathematics Teaching compass teaching aid |
| CN205615215U (en) * | 2016-03-25 | 2016-10-05 | 浙江工业职业技术学院 | Convenient to use's mathematical education compasses |
| CN207207546U (en) * | 2017-04-27 | 2018-04-10 | 杨勇 | Draw circle device |
| CN207449473U (en) * | 2017-06-06 | 2018-06-05 | 张艳锋 | Mathematical education camber line plotting unit |
| CN208069205U (en) * | 2017-08-20 | 2018-11-09 | 杨海林 | A kind of multipurpose horizontal educational compasses with telescopic rod |
| CN208085327U (en) * | 2018-03-16 | 2018-11-13 | 唐春芳 | A kind of multi-functional primary school mathematics teaching ruler |
| CN208584986U (en) * | 2018-03-16 | 2019-03-08 | 刘昕宇 | A kind of mathematics displaying device |
| CN108973453A (en) * | 2018-06-29 | 2018-12-11 | 王小兰 | A kind of compasses and its application method for blackboard upper drawing circle |
| CN208682461U (en) * | 2018-08-09 | 2019-04-02 | 信阳职业技术学院 | Mathematical education camber line plotting unit |
| CN109080336A (en) * | 2018-08-20 | 2018-12-25 | 西安石油大学 | Higher mathematics plotter |
| CN209486983U (en) * | 2018-08-23 | 2019-10-11 | 云南国土资源职业学院 | Assistant teaching aid is used in a kind of teaching |
| CN209257730U (en) * | 2018-11-27 | 2019-08-16 | 毕全威 | A kind of multi-functional Higher Mathematics Teaching drawing board |
| CN209649882U (en) * | 2019-03-12 | 2019-11-19 | 黄河科技学院 | A kind of mathematics drawing instruments |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110816128B (en) | 2023-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207636180U (en) | A kind of Noise Sources Identification device | |
| CN106308055A (en) | Shear-type teacher's desk adopting synchronous belt for lifting adjustment | |
| CN110816128A (en) | Special drawing device of higher mathematics | |
| CN202896066U (en) | Multifunctional compasses for mathematical education | |
| CN203713328U (en) | Electric compasses for teaching | |
| CN205970502U (en) | Electrodynamic type compasses | |
| CN211730839U (en) | Multipurpose mathematics drawing teaching aid | |
| CN204820829U (en) | Drawing chalk sharpener | |
| CN205579300U (en) | Telescopic led environmental protection and energy saving wall lamp | |
| CN105235421B (en) | A kind of mechanical arm type multifunctional combination plotting unit | |
| CN201016680Y (en) | Multifunctional angle gage | |
| CN106343717A (en) | Scissor type rostrum table adopting ball screw stretching | |
| CN211942756U (en) | Compasses for mathematical education | |
| CN208744779U (en) | A kind of new-type Art Design Portable tool case | |
| CN210076930U (en) | Combined learning tool | |
| CN208521488U (en) | A kind of Multifunctional teaching aid bar | |
| CN107791176B (en) | Novel positioning cylinder device | |
| CN2528638Y (en) | Compasses | |
| CN204845264U (en) | Many function combination compasses | |
| CN214468074U (en) | Beam lamp with adjustable irradiation angle | |
| CN210363110U (en) | Drawing device for environmental art design | |
| CN214112077U (en) | Ideological and political education course teaching aid that conveniently carries | |
| CN207772753U (en) | A kind of portable multifunctional fine arts case | |
| CN220465113U (en) | Cycloid teaching aid for teaching | |
| CN105252937B (en) | A kind of improved precision locating tab assembly compasses |
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: 20230703 Address after: 250002 No.1 shancai street, Laiwu high tech Zone, Jinan City, Shandong Province Applicant after: LAIWU VOCATIONAL AND TECHNICAL College Address before: No.1, shancai street, Laiwu District, Jinan City, Shandong Province Applicant before: Han Dengli |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |