CN214008749U - Teaching device for innovative entrepreneurship education course - Google Patents

Teaching device for innovative entrepreneurship education course Download PDF

Info

Publication number
CN214008749U
CN214008749U CN202023320229.3U CN202023320229U CN214008749U CN 214008749 U CN214008749 U CN 214008749U CN 202023320229 U CN202023320229 U CN 202023320229U CN 214008749 U CN214008749 U CN 214008749U
Authority
CN
China
Prior art keywords
fixed
course teaching
fixedly connected
display screen
counter weight
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.)
Expired - Fee Related
Application number
CN202023320229.3U
Other languages
Chinese (zh)
Inventor
陈斌
叶莎
毛书高
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orient Science & Technology College Of Hunan Agricultural University
Original Assignee
Orient Science & Technology College Of Hunan Agricultural University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Orient Science & Technology College Of Hunan Agricultural University filed Critical Orient Science & Technology College Of Hunan Agricultural University
Priority to CN202023320229.3U priority Critical patent/CN214008749U/en
Application granted granted Critical
Publication of CN214008749U publication Critical patent/CN214008749U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Electrically Operated Instructional Devices (AREA)

Abstract

The utility model discloses an innovation venture education course teaching device, load case, control panel and first removable cover including the counter weight, the counter weight loads the fixed cutting ferrule of all fixedly connected with in the top of the outside both sides of case, and the counter weight loads the fixed stopper of all fixedly connected with in both sides on incasement portion top. The utility model discloses a load incasement portion's bottom fixed connection's rolling box at the counter weight, electric telescopic handle can promote course teaching display screen to suitable expansion height, servo motor can drive the rolling wheel and rotate at rolling incasement portion, then the rolling wheel can carry out the rolling to the pulling connection rope, then the pulling connection rope can be connected the pulley through first connection pulley and second in proper order, and the pulling connection rope can stimulate course teaching display screen and rotate through first loose axle, the course teaching display screen can receive the gravity of connecting the hanging weight and keep horizontal position's stability, then can be convenient adjust the angle when using course teaching display screen, the comfort level is best on earth when making its use.

Description

Teaching device for innovative entrepreneurship education course
Technical Field
The utility model relates to a teaching device technical field specifically is an innovation venture education course teaching device.
Background
The innovative entrepreneurship education aims at cultivating talents with entrepreneurship basic quality and creative type personality, is not only education mainly aiming at cultivating entrepreneurship consciousness, entrepreneurship spirit and innovative entrepreneurship capacity of students in school, but also education for carrying out innovative thinking cultivation and entrepreneurship capacity exercise in a staged and hierarchical manner aiming at entrepreneurship groups which intend to entrepreneurship, entrepreneurship and successful entrepreneurship, and a teaching device is used in an innovative entrepreneurship education course, and the existing innovative entrepreneurship education course teaching device has many problems in the using process, and the specific problems are as follows:
1. the height position of the existing innovative entrepreneurship education course demonstration device is fixed in the using process, and the height of the existing innovative entrepreneurship education course demonstration device cannot be adjusted according to requirements;
2. the existing innovative entrepreneurship education course demonstration device is large in size and inconvenient to carry in the using process;
3. the current innovation entrepreneurship education course teaching device uses the angle fixed in the use, can not select suitable angle to use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an innovation venture education course teaching device to what provide in solving above-mentioned background art can not highly adjust it according to the demand, carry comparatively inconvenient to it, can not select suitable angle to use the scheduling problem.
In order to achieve the above object, the utility model provides a following technical scheme: an innovative venture education course demonstration device comprises a counterweight loading box, a control panel, a fixed bearing plate, a rolling box and a first movable cover plate, wherein the top ends of two sides of the outside of the counterweight loading box are fixedly connected with fixed cutting sleeves, the two sides of the top end of the inside of the counterweight loading box are fixedly connected with fixed limiting blocks, the counterweight loading box is fixedly connected with the bottom end of the inside of the counterweight loading box, the two sides of the bottom end of the inside of the counterweight loading box are fixedly connected with fixed hollow sleeve columns, the bottom end of the inside of each fixed hollow sleeve column is fixedly connected with a connecting spring, the inside of each fixed hollow sleeve column is slidably connected with a connecting sliding support rod, the connecting sliding support rod is fixedly connected with the fixed bearing plate at the top end, an electric telescopic rod is installed at the middle position of the top end of the fixed bearing plate, the top end of the electric telescopic rod is movably connected with a course demonstration, one side swing joint of course demonstration display screen has first removable cover, and the opposite side swing joint of course demonstration display screen has the second removable cover, control panel is installed to the intermediate position of the outside one side of case is loaded to the counter weight.
Preferably, the top fixedly connected with pulling of course teaching display screen one side is connected the rope, and the bottom of course teaching display screen one side is fixed through being connected with and is connected the counterweight block.
Preferably, connect the inside one side equidistance of slip branch and evenly be provided with a plurality of spacing jacks, and connect the fixed sliding block of bottom fixedly connected with of slip branch, fixed sliding block and coupling spring fixed connection, and fixed sliding block sliding connection inside fixed hollow sleeve post, pulley is connected to one side fixedly connected with second on fixed loading board top, and the first connecting pulley of intermediate position fixedly connected with in fixed loading board bottom.
Preferably, the top end of one side of the outside of the fixed hollow sleeve column is fixedly connected with a fixing nut, the inside of the fixing nut is movably connected with a limiting bolt, the inside of the fixing nut is provided with an internal thread, and the outside of the limiting bolt is provided with an external thread matched with the internal thread of the fixing nut.
Preferably, the middle position swing joint of the inside of rolling box has the rolling wheel, and one side of rolling wheel installs servo motor, the rolling wheel is connected the rope through the pulling and is connected with course teaching display screen.
Preferably, the first movable cover plate and the second movable cover plate are in a central symmetry structure, and both ends of one side of the first movable cover plate and one side of the second movable cover plate are fixedly connected with first connecting limiting sleeves.
Preferably, the other side of one side of the first movable cover plate and the other side of one side of the second movable cover plate are both fixedly connected with a second connecting limiting sleeve, and the inside of the second connecting limiting sleeve is movably connected with a limiting inserted rod.
Preferably, the middle positions of one sides of the first movable cover plate and the second movable cover plate are movably connected with movable clamping rods, one sides of the movable clamping rods are provided with second movable shafts, and the outer diameter of each movable clamping rod is matched with the inner diameter of the corresponding fixed clamping sleeve.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the course teaching device for innovative venture education comprises a connecting sliding rod slidably connected inside a fixed hollow sleeve column, a fixed sliding block can slide inside the fixed hollow sleeve column under the elasticity of a connecting spring, the fixed sliding block can push the connecting sliding rod to correspondingly slide inside the fixed hollow sleeve column, so that the connecting sliding rod can push a course teaching display screen at the top end of a fixed bearing plate to move to a proper height position, a limiting bolt can be rotated inside a fixed nut, the limiting bolt can move inside the fixed nut and can be inserted into a limiting jack at the position, the position of the connecting sliding rod can be fixed, the height position of the course teaching display screen can be fixed, the connecting sliding rod can be detached and loosened in the same way, and the use height of the connecting sliding rod can be adjusted according to requirements, it is convenient to use it.
(2) The course demonstration device for innovation and entrepreneurship education comprises a first movable cover plate and a second movable cover plate which are movably connected with each other on two sides of a course demonstration display screen, wherein the course demonstration display screen is lifted to a proper position, the first movable cover plate and the second movable cover plate can be unfolded and placed on two sides of the course demonstration display screen, a limit inserting rod can be inserted into a second connecting limit sleeve to limit and fix the course demonstration display screen, the course demonstration display screen is horizontally placed at the top end of a fixed bearing plate, an electric telescopic rod can enable the course demonstration display screen to be lowered to the lowest position, a connecting sliding support rod can be retracted into a fixed hollow sleeve column, the first movable cover plate and the second movable cover plate can cover the top end of the course demonstration display screen, the limit inserting rod can be inserted into the first connecting limit sleeve, and limit between the first movable cover plate and the second movable cover plate is realized, and can block movable clamping rod into inside the fixed cutting ferrule, carry on spacing to first removable cover and second removable cover once more, then can make the teaching device place in the counter weight loading incasement portion to comparatively simple and convenient when carrying the teaching device.
(3) This kind of innovation venture education course teaching device, the rolling box through the bottom fixed connection who loads incasement portion at the counter weight, electric telescopic handle can promote course teaching display screen to suitable expansion height, servo motor can drive the rolling wheel and rotate at rolling incasement portion, then the rolling wheel can be connected the rope to the pulling and carry out the rolling, then the pulling is connected the rope and can be connected the pulley through first connection pulley and second in proper order, and the pulling is connected the rope and can be pulled course teaching display screen and rotate through first loose axle, and course teaching display screen can receive the gravity of connecting the suspended weight piece and keep horizontal position's stability, then can be convenient the angle when using course teaching display screen is adjusted, the comfort level is best on the earth when making it use.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is a schematic view of a back view structure of the course demonstration display screen of the present invention;
fig. 3 is a schematic view of the folding structure of the present invention;
fig. 4 is an enlarged schematic structural diagram of a in fig. 1 according to the present invention.
In the figure: 1. a counterweight loading bin; 101. fixing the clamping sleeve; 102. fixing a limiting block; 2. a control panel; 3. a course demonstration display screen; 301. pulling the connecting rope; 302. a first movable shaft; 303. connecting the suspended weight blocks; 4. fixing a bearing plate; 401. a first connecting pulley; 402. a second connecting pulley; 403. an electric telescopic rod; 404. connecting a sliding support rod; 405. fixing the sliding block; 406. limiting the jacks; 5. fixing the hollow sleeve column; 501. a connecting spring; 502. fixing a nut; 503. a limit bolt; 6. a rolling box; 601. a winding wheel; 602. a servo motor; 7. a first removable cover; 701. the first connecting limiting sleeve; 702. the second connecting limiting sleeve; 703. a limiting inserted rod; 704. a movable clamping rod; 705. a second movable shaft; 8. and a second removable cover.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides an embodiment: the utility model provides an innovation venture education course teaching device, loads case 1, control panel 2, fixed loading board 4, rolling case 6 and first removable cover 7 including the counter weight, the top of case 1 outside both sides is loaded to the counter weight all fixedly connected with fixes cutting ferrule 101, and the both sides on the inside top of case 1 are loaded to the counter weight all fixedly connected with fixed stopper 102, and folding course teaching display screen 3 can be taken in the counter weight and load inside case 1 to place the top at fixed stopper 102. The winding box 6 of the inside bottom fixed connection of counter weight loading box 1, the inside intermediate position swing joint of winding box 6 has winding wheel 601, and servo motor 602 is installed to one side of winding wheel 601, and winding wheel 601 is connected with course teaching display screen 3 through pulling connection rope 301.
During the use, servo motor 602 can drive rolling wheel 601 and rotate in winding case 6 is inside, and then rolling wheel 601 can be to pulling connection rope 301 and carry out the rolling.
The both sides of the inside bottom of counter weight loading case 1 are fixed hollow sleeve post 5 by fixedly connected with, the inside bottom fixedly connected with coupling spring 501 of fixed hollow sleeve post 5, the top fixedly connected with fixation nut 502 of the outside one side of fixed hollow sleeve post 5, and the inside swing joint of fixation nut 502 has stop bolt 503, the inside of fixation nut 502 is provided with the internal thread, and stop bolt 503's outside is provided with the external screw thread that matches with fixation nut 502 internal thread.
When the fixing device is used, the limiting bolt 503 can be rotated inside the fixing nut 502, and then the limiting bolt 503 can move inside the fixing nut 502, and the limiting bolt 503 can be inserted into the limiting insertion hole 406 at the position, so that the position of the connecting sliding support rod 404 is fixed.
The inside sliding connection of fixed hollow socle 5 has connection sliding support rod 404, connects sliding support rod 404 and obtains the fixed loading board 4 of top fixedly connected with, and the intermediate position on fixed loading board 4 top installs electric telescopic handle 403, and electric telescopic handle 403 can promote course teaching display screen 3 to suitable expansion height.
Connect inside one side equidistance of slip branch 404 evenly to be provided with a plurality of spacing jacks 406, and connect the fixed sliding block 405 of bottom fixedly connected with of slip branch 404, fixed sliding block 405 and coupling spring 501 fixed connection, and fixed sliding block 405 sliding connection is inside fixed hollow sleeve post 5, pulley 402 is connected to one side fixedly connected with second on fixed loading board 4 top, and the intermediate position fixedly connected with first connecting pulley 401 of fixed loading board 4 bottom.
When the device is used, the fixed sliding block 405 can push the connecting sliding support rod 404 to correspondingly slide in the fixed hollow sleeve column 5, so that the connecting sliding support rod 404 can push the course teaching display screen 3 at the top end of the fixed bearing plate 4 to move to a proper height position.
Electric telescopic handle 403's top end swing joint has course demonstration display screen 3, and the intermediate position of course demonstration display screen 3 bottom is provided with first loose axle 302, and the rope 301 is connected in the pulling of the top fixedly connected with of course demonstration display screen 3 one side, and the bottom mounting of course demonstration display screen 3 one side is connected the suspended weight piece 303 through being connected with.
When in use, the course teaching display screen 3 is kept stable in horizontal position by the gravity of the connecting weight 303.
One side swing joint of course teaching display screen 3 has first removable cover 7, first removable cover 7 is central symmetrical structure with second removable cover 8, and first removable cover 7 all fixedly connected with first connection stop collar 701 with the both ends of second removable cover 8 one side, first removable cover 7 all fixedly connected with second connection stop collar 702 with the opposite side of second removable cover 8 one side, and the inside swing joint that the second connects stop collar 702 has spacing inserted bar 703, the intermediate position of first removable cover 7 and second removable cover 8 one side all swing joint has activity kelly 704, and one side of activity kelly 704 is provided with second loose axle 705, the external diameter size of activity kelly 704 and the internal diameter size phase-match of fixed cutting ferrule 101, and the opposite side swing joint of course teaching display screen 3 has second removable cover 8.
During the use, can insert inside first connection stop collar 701 with spacing inserted bar 703, realize spacing between first removable cover 7 and the second removable cover 8, and can carry out spacing to first removable cover 7 and second removable cover 8 once more inside fixed cutting ferrule 101 is gone into with activity kelly 704 card.
The middle position of one side of the outer part of the counterweight loading box 1 is provided with a control panel 2, the output end of the control panel 2 is electrically connected with the input ends of an electric telescopic rod 403 and a servo motor 602 through a lead, the servo motor 602 is YL-7112, and the electric telescopic rod 403 is DYTZB 1000-500/110-X.
The working principle is as follows: when the device is used, the fixed sliding block 405 can slide in the fixed hollow sleeve column 5 by the elastic force of the connecting spring 501, the fixed sliding block 405 can push the connecting sliding support rod 404 to correspondingly slide in the fixed hollow sleeve column 5, so that the connecting sliding support rod 404 can push the course teaching display screen 3 at the top end of the fixed bearing plate 4 to move to a proper height position, at the moment, the limiting bolt 503 can rotate in the fixed nut 502, the limiting bolt 503 can move in the fixed nut 502, and the limiting bolt 503 can be inserted into the limiting insertion hole 406 at the position, thereby fixing the position of the connecting sliding support rod 404, fixing the height position of the course teaching display screen 3, similarly, the device can be detached and loosened, the using height of the device can be adjusted according to requirements, the device is convenient to use, the electric telescopic rod 403 can push the course teaching display screen 3 to a proper unfolding height, the servo motor 602 can drive the winding wheel 601 to rotate inside the winding box 6, the winding wheel 601 can wind the pulling connecting rope 301, the pulling connecting rope 301 sequentially passes through the first connecting pulley 401 and the second connecting pulley 402, the pulling connecting rope 301 can pull the course teaching display screen 3 to rotate through the first movable shaft 302, the course teaching display screen 3 can be kept stable in a horizontal position under the action of the gravity connected with the suspension weight 303, the angle of the course teaching display screen 3 in use can be conveniently adjusted, the comfort level of the course teaching display screen 3 in use is optimal, after the course teaching display screen 3 is lifted to a proper position, the first movable cover plate 7 and the second movable cover plate 8 can be unfolded and placed on two sides of the course teaching display screen 3, the limit inserting rod 703 can be inserted into the second connecting limit sleeve 702 to limit and fix the course teaching display screen 3, and therefore the course teaching display screen 3 can be used, course teaching display screen 3 keeps flat behind fixed loading board 4 top, electric telescopic handle 403 can make it fall to the lowest position, and can make and connect inside sliding support rod 404 contracts into fixed hollow sleeve post 5, first removable cover 7 and second removable cover 8 can cover the top at course teaching display screen 3 this moment, and can insert inside first connecting stop collar 701 with spacing inserted bar 703, realize spacing between first removable cover 7 and the second removable cover 8, and can block movable clamping bar 704 into inside fixed cutting ferrule 101, carry on spacingly to first removable cover 7 and second removable cover 8 once more, then can make teaching device can place inside counter weight loading box 1, thereby it is comparatively simple and convenient when carrying teaching device.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. The utility model provides an innovation venture education course teaching device, loads case (1), control panel (2), fixed loading board (4), rolling case (6) and first removable cover (7) including the counter weight, its characterized in that: the top of the outside both sides of the counter weight loading box (1) is fixedly connected with a fixed clamping sleeve (101), the two sides of the inside top of the counter weight loading box (1) are fixedly connected with a fixed limiting block (102), the counter weight loading box (1) is fixedly connected with a winding box (6) at the inside bottom of the counter weight loading box (1), the two sides of the inside bottom of the counter weight loading box (1) are fixedly connected with a fixed hollow sleeve column (5), the bottom of the inside of the fixed hollow sleeve column (5) is fixedly connected with a connecting spring (501), the inside of the fixed hollow sleeve column (5) is slidably connected with a connecting sliding support rod (404), the connecting sliding support rod (404) is fixedly connected with a fixed bearing plate (4), an electric telescopic rod (403) is installed at the middle position of the top of the fixed bearing plate (4), and a course demonstration screen (3) is movably connected to the top of the electric telescopic rod (403), and the intermediate position of course teaching display screen (3) bottom is provided with first loose axle (302), one side swing joint of course teaching display screen (3) has first removable cover (7), and the opposite side swing joint of course teaching display screen (3) has second removable cover (8), control panel (2) are installed to the intermediate position of counter weight loading box (1) outside one side.
2. The innovative startup education course teaching device according to claim 1, wherein: the top fixedly connected with pulling of course teaching display screen (3) one side is connected rope (301), and the bottom mounting of course teaching display screen (3) one side is through being connected with and connects counterweight block (303).
3. The innovative startup education course teaching device according to claim 1, wherein: connect inside one side equidistance of slip branch (404) and evenly be provided with a plurality of spacing jacks (406), and connect the fixed sliding block (405) of bottom fixedly connected with of slip branch (404), fixed sliding block (405) and coupling spring (501) fixed connection, and fixed sliding block (405) sliding connection is inside fixed hollow sleeve post (5), and pulley (402) are connected to one side fixedly connected with second on fixed loading board (4) top, and the intermediate position fixedly connected with first connecting pulley (401) of fixed loading board (4) bottom.
4. The innovative startup education course teaching device according to claim 1, wherein: the top end of one side of the outside of the fixed hollow sleeve column (5) is fixedly connected with a fixing nut (502), the inside of the fixing nut (502) is movably connected with a limiting bolt (503), the inside of the fixing nut (502) is provided with an internal thread, and the outside of the limiting bolt (503) is provided with an external thread matched with the internal thread of the fixing nut (502).
5. The innovative startup education course teaching device according to claim 1, wherein: the inside intermediate position swing joint of coiling box (6) has rolling wheel (601), and one side of rolling wheel (601) installs servo motor (602), rolling wheel (601) are connected rope (301) and course teaching display screen (3) through the pulling.
6. The innovative startup education course teaching device according to claim 1, wherein: the first movable cover plate (7) and the second movable cover plate (8) are of a central symmetry structure, and both ends of one side of the first movable cover plate (7) and one side of the second movable cover plate (8) are fixedly connected with first connecting limiting sleeves (701).
7. The innovative startup education course teaching device according to claim 1, wherein: the other side of one side of the first movable cover plate (7) and the other side of one side of the second movable cover plate (8) are both fixedly connected with a second connecting limiting sleeve (702), and a limiting inserted rod (703) is movably connected inside the second connecting limiting sleeve (702).
8. The innovative startup education course teaching device according to claim 1, wherein: the middle positions of one sides of the first movable cover plate (7) and the second movable cover plate (8) are movably connected with movable clamping rods (704), one sides of the movable clamping rods (704) are provided with second movable shafts (705), and the outer diameter of each movable clamping rod (704) is matched with the inner diameter of the corresponding fixed clamping sleeve (101).
CN202023320229.3U 2020-12-31 2020-12-31 Teaching device for innovative entrepreneurship education course Expired - Fee Related CN214008749U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023320229.3U CN214008749U (en) 2020-12-31 2020-12-31 Teaching device for innovative entrepreneurship education course

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023320229.3U CN214008749U (en) 2020-12-31 2020-12-31 Teaching device for innovative entrepreneurship education course

Publications (1)

Publication Number Publication Date
CN214008749U true CN214008749U (en) 2021-08-20

Family

ID=77294039

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023320229.3U Expired - Fee Related CN214008749U (en) 2020-12-31 2020-12-31 Teaching device for innovative entrepreneurship education course

Country Status (1)

Country Link
CN (1) CN214008749U (en)

Similar Documents

Publication Publication Date Title
CN108961930A (en) A kind of fine-tuning Modern Literature show stand for showing range
CN210223298U (en) Pie chart presentation device for finance teaching
CN214008749U (en) Teaching device for innovative entrepreneurship education course
CN211092790U (en) Auxiliary device for guiding and learning of broadcast television
CN208906960U (en) A kind of convenient wire dispenser of movement
CN215577598U (en) Novel instructor student management is with bulletin device
CN205318799U (en) Bulletin board for ideological and political education
CN210722054U (en) Friction force experimental device
CN210348834U (en) Foreign chinese teaching presentation device with rotary mechanism
CN204432118U (en) A kind of high number teaching Multipurpose display shelf
CN209895573U (en) Junior middle school history teaching is with show stores pylon
CN209070797U (en) A kind of learning data analysis table showing stand in wisdom classroom
CN206451406U (en) A kind of portable think of political affairs teaching demonstration device
CN207663616U (en) A kind of adjustable board of education
CN207683188U (en) A kind of employment teaching demonstration device
CN209846587U (en) Drawing and text hanging device for junior middle school Chinese teaching
CN206249675U (en) A kind of new education technology exhibiting device
CN206021672U (en) A kind of Economic Majored Students propaganda and education showing stand
CN209185901U (en) A kind of this support frame of Chinese literature didactic works
CN108887956A (en) A kind of teacher's chart hanging rack for teaching
CN215435827U (en) Kindergarten mr uses taste drawing board convenient to use
CN220709913U (en) Fruit bulletin board
CN211021732U (en) Liftable picture is hung
CN214705099U (en) Portable english teaching board
CN215014531U (en) Student thinks political affairs with portable speech table of working

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20210820

Termination date: 20211231

CF01 Termination of patent right due to non-payment of annual fee