CN209859309U - Online education equipment convenient to background is switched - Google Patents

Online education equipment convenient to background is switched Download PDF

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Publication number
CN209859309U
CN209859309U CN201821535822.XU CN201821535822U CN209859309U CN 209859309 U CN209859309 U CN 209859309U CN 201821535822 U CN201821535822 U CN 201821535822U CN 209859309 U CN209859309 U CN 209859309U
Authority
CN
China
Prior art keywords
box body
winding shaft
plate
writing
fixing
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
CN201821535822.XU
Other languages
Chinese (zh)
Inventor
甘宇
胡明丽
彭丽玲
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.)
Hunan College of Information
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Hunan College of Information
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 Hunan College of Information filed Critical Hunan College of Information
Priority to CN201821535822.XU priority Critical patent/CN209859309U/en
Application granted granted Critical
Publication of CN209859309U publication Critical patent/CN209859309U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses an online education device convenient for background switching, which comprises a primary box body and a secondary box body; the primary box body is a box body structure which is formed by splicing a bottom plate, a first back plate and two first side plates, the front end of the box body structure is provided with an opening, and the middle parts of the first back plate and the two first side plates are mutually communicated with a groove; the secondary box body is a box body structure which is formed by splicing a top plate, a second back plate and two second side plates and has an opening at the front end and the bottom; the second back plate and the two second side plates can be movably arranged in the groove up and down; a sucker type fixed table mechanism capable of lifting up and down is arranged in the secondary box body, and a notebook computer for online teaching is fixed on the sucker type fixed table mechanism; the front end of the top plate is hinged with a cover plate; the cover plate is hinged with the electric control background; a continuous page-changing writing mechanism is arranged inside the secondary box body; the first-stage box body is connected with the second-stage box body through a lifting mechanism. The utility model discloses be convenient for accomodate and carry, can carry out quick replacement to the background, improved visual effect.

Description

Online education equipment convenient to background is switched
Technical Field
The utility model belongs to the teaching field specifically is an online education equipment convenient to background switches.
Background
With the rapid development of information technology, especially from the internet to the mobile internet, cross-space life, work and learning modes are created, and the mode of acquiring knowledge is fundamentally changed. The teaching and learning can be free from the limitation of time, space and place conditions, and the knowledge acquisition channel is flexible and diversified.
At present, online education has no special teaching equipment, so the following problems generally exist: 1. when going out, the computer desk is heavy and inconvenient to carry, and the notebook computer has no place to place, so that courses for online teaching are laid; 2. the content needing to be displayed in writing is more, so that the writing paper on the desktop is placed in disorder, and the teaching effect is influenced; 3. the teaching background is monotonous, visual fatigue is easy to generate, and freshness is not provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at above problem, provide an online education equipment convenient to background switches, be convenient for accomodate and carry, can carry out quick replacement to the background, improved visual effect.
In order to realize the above purpose, the utility model adopts the technical scheme that: it comprises a first-stage box body and a second-stage box body; the primary box body is a box body structure which is formed by splicing a bottom plate, a first back plate and two first side plates, the front end of the box body structure is provided with an opening, and the middle parts of the first back plate and the two first side plates are mutually communicated with a groove; the secondary box body is a box body structure which is formed by splicing a top plate, a second back plate and two second side plates and has an opening at the front end and the bottom; the second back plate and the two second side plates can be movably arranged in the groove up and down; a sucker type fixed table mechanism capable of lifting up and down is arranged in the secondary box body, and a notebook computer for online teaching is fixed on the sucker type fixed table mechanism; a nest for accommodating the notebook computer is arranged at the bottom of the top plate and right above the sucker type fixed table mechanism, and a spongy cushion is arranged on the inner wall of the nest; the front end of the top plate is hinged with a cover plate; the cover plate is hinged with the electric control background; a continuous page-changing writing mechanism is arranged inside the secondary box body; a lighting lamp for supplementing light rays is arranged inside the secondary box body; the first-stage box body is connected with the second-stage box body through a lifting mechanism; the lower end surface of the cover plate is provided with an electric control background accommodating groove, the bottom of the cover plate is provided with a fixed seat, and the fixed seat is hinged at a groove opening in the top plate; a second seat body is arranged in the electric control background accommodating groove; the electric control background comprises a carrier, the carrier is hinged on the second seat body, a fourth square through hole is formed in the middle of the carrier, a third winding shaft and a fourth winding shaft are arranged in the fourth square through hole, background cloth is wound between the third winding shaft and the fourth winding shaft, a second case is arranged at the left end of the carrier, a third stepping motor is arranged inside the second case, and an output shaft of the third stepping motor is connected with the third winding shaft through a second bevel gear; and the third winding shaft and the fourth winding shaft are respectively provided with a first belt pulley and a second belt pulley, and the first belt pulley and the second belt pulley are connected through a driving belt.
Furthermore, the continuous page changing writing mechanism comprises a frame body and reel writing paper, a first winding shaft and a second winding shaft are arranged in the frame body, and a writing cushion block is arranged between the first winding shaft and the second winding shaft; the reel writing paper is arranged on the first winding shaft; the pulling-out end of the reel writing paper is attached to the upper surface of the writing cushion block and extends and is fixed on the second winding shaft; a first chassis is arranged at the left end of the frame body, a first stepping motor is arranged in the first chassis, and an output shaft of the first stepping motor is connected with a second winding shaft through a first helical gear; the upper surface of writing the cushion is higher than the framework, and the both ends of writing the cushion all are provided with the circular arc that is used for preventing the reel writing paper from cutting open.
Further, a connecting seat is arranged on the frame body, a fixed block is arranged on the first back plate, and the connecting seat is hinged to the fixed block; a fixing mechanism for supporting the continuous page-changing writing mechanism is arranged in the first-stage box body.
Furthermore, the fixing mechanism comprises two first linear guide rails which are respectively arranged on the inner side wall of the first side plate; the first linear guide rail is provided with a sliding block for supporting the frame body, and the tail end of the first linear guide rail is provided with a limiting block for preventing the supporting sliding block from slipping.
Furthermore, sucking disc formula fixed station mechanism includes second linear guide, installs sucking disc formula fixed station on the second straight line, and second linear guide's bottom is provided with the dog, installs ball screw between dog and the roof, and ball screw's lower extreme and the output shaft of second step motor, sucking disc formula fixed station and ball screw fixed connection, the outside of second step motor is provided with the protection casing.
Further, sucking disc formula fixed station includes the fixed station body, and the upper end of fixed station body is provided with the third square hole, and the activity is provided with the plate body in the third square hole, and it is fixed to be connected through supporting spring between plate body and the fixed station body bottom, and the sucking disc is installed to the upper end of plate body, and online for the teaching notebook computer install on the sucking disc.
Furthermore, the lifting mechanism comprises a first fixing lug and a second fixing lug which are arranged on the top plate, a support and a support which are arranged on the first back plate, an electric push-pull rod which is arranged on the support, and a guide shaft which is connected to the lower end of the first fixing lug, wherein the guide shaft is movably inserted into the support, and the extending end of the electric push-pull rod is connected with the second fixing lug.
The utility model has the advantages that: the utility model provides an online education equipment convenient to background switches, is convenient for accomodate and carry, can carry out the automation to the background and change, has good privacy simultaneously, has avoided the interference of external activity to online teaching.
1. Be provided with continuous page changing and write the mechanism, write the writing paper of structural upper surface and write the back full, can carry out the change fast to the page, practiced thrift the time of online education paper show in writing, improved teaching efficiency.
2. The utility model discloses a elevating system drives second grade box oscilaltion and accomodates, has made things convenient for the use.
3. The sucking disc formula fixed station can be fixed notebook computer more firmly, and notebook computer accomodates in the nest simultaneously, has the absorbing effect, can play the guard action to notebook computer during the transport.
4. The electronic control background is arranged, the background patterns or the image-text data can be rapidly displayed and switched through the electronic control background, and the requirements of online education are met.
Drawings
Fig. 1 is a schematic view of the first angle of the utility model after expansion.
Fig. 2 is the utility model discloses accomodate the spatial structure sketch map of back first angle.
Fig. 3 is the perspective view of the second angle after storage of the present invention.
Fig. 4 is a schematic perspective view of the second angle after the present invention is unfolded.
Fig. 5 is a schematic view of the three-dimensional structure of the middle-stage box body when the continuous page-changing writing mechanism is installed therein.
FIG. 6 is a schematic view of the three-dimensional structure of the middle stage case without the continuous page-changing writing mechanism
Fig. 7 is a schematic view of the three-dimensional structure of the middle-stage box body when a suction cup type fixed table mechanism is installed therein.
Fig. 8 is a schematic view of the three-dimensional structure of the continuous page-changing writing mechanism of the present invention when no roll is mounted on the writing paper.
Fig. 9 is a schematic view of the three-dimensional structure of the continuous page-changing writing mechanism of the present invention when a roll is installed to write paper.
Fig. 10 is a schematic view of the internal structure of the continuous page-changing writing mechanism of the present invention when no roll paper is mounted.
Fig. 11 is a schematic view of a three-dimensional structure of the middle suction cup type fixing table of the present invention.
Fig. 12 is a top view of the suction cup type fixing table of the present invention.
Fig. 13 is a cross-sectional view taken at a-a in fig. 12.
Fig. 14 is a schematic perspective view of the electronic control background of the present invention in an expanded state.
Fig. 15 is a schematic view of the three-dimensional structure of the electric control background in the storage state of the present invention
Fig. 16 is an internal structure diagram of the electric control background of the present invention.
The text labels in the figures are represented as: 1. a first-stage box body; 2. a second-stage box body; 3. folding arm-chairs; 4. pressing the lock catch; 5. a continuous page-changing writing mechanism; 6. a sucker type fixed table mechanism; 7. a cover plate; 8. an electric control background; 9. a fixing mechanism; 10. a second fixing lug; 11. an electric push-pull rod; 12. a support; 13. a support; 14. a guide shaft; 15. a first fixing lug; 17. an illuminating lamp; 101. a groove; 102. a chute; 103. a fixed block; 104. a T-shaped track; 105. a base plate; 106. a first side plate; 107. a first back plate; 201. a top plate; 202. a second side plate; 204. a nest; 205. a notch; 206. a second back plate; 501. a frame body; 502. a connecting seat; 503. writing a cushion block; 504. a second wind-up reel; 505. a first winding shaft; 506. a first chassis; 507. roll writing paper; 509. a first helical gear; 510. a circular arc; 511. a first stepper motor; 601. a second linear guide; 602. a stopper; 603. a protective cover; 604. a suction disc type fixed table; 605. a ball screw; 606. a second stepping motor; 6041. a fixed table body; 6042. a plate body; 6043. a suction cup; 6044. a track groove; 6045. a through hole; 6046. a third square hole; 6047. a support spring; 701. an electric control background accommodating groove; 702. a fixed seat; 703. a second seat body; 801. a carrier; 802. a fourth square through hole; 803. a third wind-up shaft; 804. a fourth wind-up shaft; 805. rolling background cloth; 806. a second chassis; 807. a drive belt; 808. a second pulley; 809. a third step motor; 810. a second helical gear; 8011. a first pulley; 901. a first linear guide rail; 902. a slider; 903. and a limiting block.
Detailed Description
In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.
As shown in fig. 1-16, the specific structure of the present invention is: it comprises a first-stage box body 1 and a second-stage box body 2; the primary box body 1 is a box body structure with an opening at the front end and the top, and is formed by splicing a bottom plate 105, a first back plate 107 and two first side plates 106, and the middle parts of the first back plate 107 and the two first side plates 106 are mutually communicated with a groove 101; the secondary box body 2 is a box body structure with an opening at the front end and the bottom and formed by splicing a top plate 201, a second back plate 206 and two second side plates 202; the second back plate 206 and the two second side plates 202 are movably arranged in the groove 101 up and down; a sucker type fixed table mechanism 6 capable of lifting up and down is arranged in the secondary box body 2, and a notebook computer for online teaching is fixed on the sucker type fixed table mechanism 6; a nest 204 for accommodating the notebook computer is arranged at the bottom of the top plate 201 and right above the sucker type fixed table mechanism 6, and a sponge pad is arranged on the inner wall of the nest 204; the front end of the top plate 201 is hinged with a cover plate 7; the cover plate 7 is hinged with the electric control background 8; a continuous page-changing writing mechanism 5 is arranged inside the secondary box body 2; an illuminating lamp 17 for supplementing light is arranged inside the secondary box body 2; the first-stage box body 1 is connected with the second-stage box body 2 through a lifting mechanism; an electric control background accommodating groove 701 is formed in the lower end face of the cover plate 7, a fixing seat 702 is arranged at the bottom of the cover plate 7, and the fixing seat 702 is hinged to the notch 205 in the top plate 201; a second seat body 703 is arranged in the electric control background accommodating groove 701; the electric control background 8 comprises a carrier 801, the carrier 801 is hinged to the second seat body 703, a fourth square through hole 802 is formed in the middle of the carrier 801, a third winding shaft 803 and a fourth winding shaft 804 are arranged in the fourth square through hole 802, background cloth 805 is wound between the third winding shaft 803 and the fourth winding shaft 804, a second case 806 is arranged at the left end of the carrier 801, a third stepping motor 809 is arranged inside the second case 806, and an output shaft of the third stepping motor 809 is connected with the third winding shaft 803 through a second bevel gear 810; a first pulley 8011 and a second pulley 808 are respectively arranged on the third take-up shaft 803 and the fourth take-up shaft 804, and the first pulley 8011 and the second pulley 808 are connected by a driving belt 807.
Preferably, the continuous page-changing writing mechanism 5 comprises a frame 501 and a roll of writing paper 507, a first winding shaft 505 and a second winding shaft 504 are installed inside the frame 501, and a writing pad 503 is arranged between the first winding shaft 505 and the second winding shaft 504; the roll writing paper 507 is mounted on the first take-up reel 505; the pulling-out end of the roll writing paper 507 is attached to the upper surface of the writing pad 503 and extends and is fixed on the second winding shaft 504; a first chassis 506 is arranged at the left end of the frame body 501, a first stepping motor 511 is arranged in the first chassis 506, and an output shaft of the first stepping motor 511 is connected with the second winding shaft 504 through a first bevel gear 509; the upper surface of the writing pad block 503 is higher than the frame 501, and both ends of the writing pad block 503 are provided with circular arcs 510 for preventing the roll writing paper 507 from being cut.
Preferably, the frame 501 is provided with a connecting seat 502, the first back plate 107 is provided with a fixing block 103, and the connecting seat 502 is hinged on the fixing block 103; a fixing mechanism 9 for supporting the continuous page-changing writing mechanism 5 is arranged in the first-stage box body 1.
Preferably, the fixing mechanism 9 includes two first linear guide rails 901, and the two first linear guide rails 901 are respectively installed on the inner side wall of the first side plate 106; a slider 902 for supporting the frame 501 is mounted on the first linear guide 901, and a stopper 903 for preventing the supporting slider 902 from slipping is disposed at the end of the first linear guide 901.
Preferably, the suction cup type fixed table mechanism 6 comprises a second linear guide rail 601, a suction cup type fixed table 604 is mounted on the second linear guide rail 601, a stop block 602 is arranged at the bottom of the second linear guide rail 601, a ball screw 605 is mounted between the stop block 602 and the top plate 201, the lower end of the ball screw 605 is connected with an output shaft of a second stepping motor 606, the suction cup type fixed table 604 is fixedly connected with the ball screw 605, and a protective cover 603 is arranged on the outer side of the second stepping motor 606.
Preferably, sucking disc formula fixed station 604 includes fixed station body 6041, and the upper end of fixed station 6041 is provided with third square hole 6046, and third square hole 6046 internalization is provided with plate body 6042, is connected fixedly through supporting spring 6047 between plate body 6042 and the fixed station 6041 bottom, and sucking disc 6043 is installed to plate body 6042's upper end, and online for the teaching notebook computer install on sucking disc 6043.
Preferably, the lifting mechanism comprises a first fixing lug 15 and a second fixing lug 10 which are arranged on the top plate 201, a bracket 13 and a support 12 which are arranged on the first back plate 107, an electric push-pull rod 11 which is arranged on the bracket 13, and a guide shaft 14 which is connected to the lower end of the first fixing lug 15, wherein the guide shaft 14 is movably inserted in the support 12, and the extending end of the electric push-pull rod 11 is connected with the second fixing lug 10.
The utility model discloses be provided with continuous page changing and write the mechanism, write the paper of writing structural upper surface and write the back full, can carry out the rapidization to the page and switch over, practiced thrift the time of online education paper show in writing, improved teaching efficiency.
The utility model discloses a elevating system drives second grade box oscilaltion and accomodates, has made things convenient for the use.
The sucking disc formula fixed station can be fixed notebook computer more firmly, and notebook computer accomodates in the nest simultaneously, has the absorbing effect, can play the guard action to notebook computer during the transport.
The electronic control background is arranged, the background patterns or the image-text data can be rapidly displayed and switched through the electronic control background, and the requirements of online education are met.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims (7)

1. An online education device convenient for background switching is characterized by comprising a primary box body (1) and a secondary box body (2); the primary box body (1) is a box body structure which is formed by splicing a bottom plate (105), a first back plate (107) and two first side plates (106) and is provided with an opening at the front end and the top, and the middle parts of the first back plate (107) and the two first side plates (106) are mutually communicated with a groove (101); the secondary box body (2) is a box body structure which is formed by splicing a top plate (201), a second back plate (206) and two second side plates (202) and is provided with an opening at the front end and the bottom; the second back plate (206) and the two second side plates (202) are movably arranged in the groove (101) up and down; a sucker type fixed table mechanism (6) capable of lifting up and down is arranged in the secondary box body (2), and a notebook computer for online teaching is fixed on the sucker type fixed table mechanism (6); a nest (204) for accommodating the notebook computer is arranged at the bottom of the top plate (201) and right above the sucker type fixed table mechanism (6), and a sponge pad is arranged on the inner wall of the nest (204); the front end of the top plate (201) is hinged with a cover plate (7); the cover plate (7) is hinged with the electric control background (8); a continuous page changing writing mechanism (5) is arranged in the secondary box body (2); an illuminating lamp (17) for supplementing light is arranged inside the secondary box body (2); the primary box body (1) is connected with the secondary box body (2) through a lifting mechanism; an electric control background accommodating groove (701) is formed in the lower end face of the cover plate (7), a fixing seat (702) is arranged at the bottom of the cover plate (7), and the fixing seat (702) is hinged to a notch (205) in the top plate (201); a second seat body (703) is arranged in the electric control background accommodating groove (701); the electric control background (8) comprises a carrier (801), the carrier (801) is hinged to a second seat body (703), a fourth square through hole (802) is formed in the middle of the carrier (801), a third winding shaft (803) and a fourth winding shaft (804) are arranged in the fourth square through hole (802), background cloth (805) is wound between the third winding shaft (803) and the fourth winding shaft (804), a second case (806) is arranged at the left end of the carrier (801), a third stepping motor (809) is arranged inside the second case (806), and an output shaft of the third stepping motor (809) is connected with the third winding shaft (803) through a second bevel gear (810); a first belt pulley (8011) and a second belt pulley (808) are respectively arranged on the third winding shaft (803) and the fourth winding shaft (804), and the first belt pulley (8011) and the second belt pulley (808) are connected through a driving belt (807).
2. The on-line education device convenient for background switching as claimed in claim 1 wherein the continuous page-changing writing mechanism (5) comprises a frame (501) and a roll of writing paper (507), a first winding shaft (505) and a second winding shaft (504) are installed inside the frame (501), and a writing pad (503) is provided between the first winding shaft (505) and the second winding shaft (504); the reel writing paper (507) is arranged on the first winding shaft (505); the pulling-out end of the reel writing paper (507) is attached to the upper surface of the writing cushion block (503) and extends and is fixed on the second winding shaft (504); a first chassis (506) is arranged at the left end of the frame body (501), a first stepping motor (511) is installed inside the first chassis (506), and an output shaft of the first stepping motor (511) is connected with a second winding shaft (504) through a first bevel gear (509); the upper surface of the writing cushion block (503) is higher than the frame body (501), and both ends of the writing cushion block (503) are provided with circular arcs (510) for preventing the reel writing paper (507) from being cut.
3. The online education device convenient for background switching according to claim 2, wherein the frame body (501) is provided with a connecting base (502), the first backboard (107) is provided with a fixing block (103), and the connecting base (502) is hinged on the fixing block (103); a fixing mechanism (9) for supporting the continuous page-changing writing mechanism (5) is arranged in the first-stage box body (1).
4. The online education device convenient for background switching according to claim 3, wherein the fixing mechanism (9) includes two first linear guides (901), each of the first linear guides (901) is mounted on the inner side wall of the first side plate (106); the first linear guide rail (901) is provided with a sliding block (902) for supporting the frame body (501), and the tail end of the first linear guide rail (901) is provided with a limiting block (903) for preventing the supporting sliding block (902) from slipping.
5. The on-line education equipment convenient for background switching as claimed in claim 1 wherein the sucker type fixed table mechanism (6) includes a second linear guide (601) on which the sucker type fixed table (604) is mounted, a stopper (602) is provided at the bottom of the second linear guide (601), a ball screw (605) is mounted between the stopper (602) and the top plate (201), the lower end of the ball screw (605) is connected with the output shaft of the second stepping motor (606), the sucker type fixed table (604) is fixedly connected with the ball screw (605), and a protective cover (603) is provided at the outer side of the second stepping motor (606).
6. The on-line education equipment convenient for background switching as claimed in claim 5 wherein the sucker type fixing table (604) includes a fixing table body (6041), the upper end of the fixing table body (6041) is provided with a third square hole (6046), a plate body (6042) is movably arranged in the third square hole (6046), the plate body (6042) is fixedly connected with the bottom of the fixing table body (6041) through a supporting spring (6047), the upper end of the plate body (6042) is provided with a sucker (6043), and the notebook computer for on-line teaching is mounted on the sucker (6043).
7. An on-line education device convenient for background switching as claimed in claim 1 wherein the lifting mechanism includes a first fixing lug (15) and a second fixing lug (10) on the top plate (201), a bracket (13) and a support (12) on the first back plate (107), an electric push-pull rod (11) mounted on the bracket (13), a guide shaft (14) connected to the lower end of the first fixing lug (15), the guide shaft (14) is movably inserted in the support (12), the protruding end of the electric push-pull rod (11) is connected to the second fixing lug (10).
CN201821535822.XU 2018-09-20 2018-09-20 Online education equipment convenient to background is switched Expired - Fee Related CN209859309U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821535822.XU CN209859309U (en) 2018-09-20 2018-09-20 Online education equipment convenient to background is switched

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821535822.XU CN209859309U (en) 2018-09-20 2018-09-20 Online education equipment convenient to background is switched

Publications (1)

Publication Number Publication Date
CN209859309U true CN209859309U (en) 2019-12-27

Family

ID=68928049

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821535822.XU Expired - Fee Related CN209859309U (en) 2018-09-20 2018-09-20 Online education equipment convenient to background is switched

Country Status (1)

Country Link
CN (1) CN209859309U (en)

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GR01 Patent grant
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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191227

Termination date: 20200920