CN111637328A - Multimedia teaching equipment - Google Patents

Multimedia teaching equipment Download PDF

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Publication number
CN111637328A
CN111637328A CN202010531922.0A CN202010531922A CN111637328A CN 111637328 A CN111637328 A CN 111637328A CN 202010531922 A CN202010531922 A CN 202010531922A CN 111637328 A CN111637328 A CN 111637328A
Authority
CN
China
Prior art keywords
rod
swing
motor
box
bottom box
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
Application number
CN202010531922.0A
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Chinese (zh)
Other versions
CN111637328B (en
Inventor
余苏祥
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.)
Liaocheng Nut Education Technology Co ltd
Original Assignee
Individual
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
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Priority to CN202010531922.0A priority Critical patent/CN111637328B/en
Publication of CN111637328A publication Critical patent/CN111637328A/en
Application granted granted Critical
Publication of CN111637328B publication Critical patent/CN111637328B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/043—Allowing translations
    • F16M11/046—Allowing translations adapted to upward-downward translation movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B5/00—Electrically-operated educational appliances
    • G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Manipulator (AREA)
  • Projection Apparatus (AREA)

Abstract

The invention discloses a multimedia teaching device, which comprises a mounting frame, wherein an open inner cavity is arranged in the mounting frame, a sliding fit box body is arranged in the inner cavity in a sliding manner, an output threaded rod is arranged between the end walls at the two sides of the inner cavity in a rotating manner and is in threaded fit connection with the sliding fit box body, a mobile motor is fixedly arranged at one side of the mounting frame and is in power connection with the output threaded rod, and a bottom box body is arranged at one side of the mounting frame. The longest extension length is achieved in the most space-saving manner.

Description

Multimedia teaching equipment
Technical Field
The invention relates to the technical field of multimedia teaching equipment, in particular to multimedia teaching equipment.
Background
The existing teaching equipment, especially relates to the use of a projector, because frequent height adjustment can be carried out on the projector, the existing equipment has the disadvantages that when the equipment is adjusted on the projector, the cylindrical lifting is mostly adopted, the existing equipment has the disadvantages that the cylindrical structure occupies a large amount of space in the space, and due to the existence of the cylindrical structure in the vertical direction, personnel entering and exiting or article placing can be prevented, and in the actual use, because the cylindrical structure mainly depends on the sliding between the cylinders when the telescopic distance is changed, if a single cylinder breaks down, the actual work of other cylinders can be influenced, the equipment does not have the function of height adjustment, and the reliability of the equipment in the work process is further reduced.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a multimedia teaching apparatus, which can solve the above problems in the prior art.
The invention is realized by the following technical scheme: the multimedia teaching equipment comprises a mounting frame, wherein an open inner cavity is formed in the mounting frame, a sliding fit box body is arranged in the inner cavity in a sliding mode, an output threaded rod is arranged between end walls on two sides of the inner cavity in a rotating mode and is in threaded fit connection with the sliding fit box body, a moving motor is fixedly arranged on one side of the mounting frame and is in power connection with the output threaded rod, a bottom box body is arranged on one side of the mounting frame, a swing adjusting device capable of saving equipment unfolding and folding space and enabling the bottom box body to be capable of adjusting stretching in a larger range is arranged between the bottom box body and the sliding fit box body, and a placing device used for placing a projection instrument is arranged in the bottom box body.
Further technical scheme, swing adjusting device includes a plurality of semicircle pendulum rods, semicircle pendulum rod one side be provided with the side swing arm that the semicircle pendulum rod corresponds, be provided with between semicircle pendulum rod, side swing arm and the cooperation box that slides and to make semicircle pendulum rod, side swing arm and the cooperation box that slides carry out the folding subassembly that expandes that folds between the box that expandes, the bottom box with be provided with between the side swing arm and to make the bottom box carries out the adjusting part that rotates the regulation.
Further technical scheme, folding expansion subassembly including set firmly in the side built-in motor in the cooperation box that slides, the cooperation box that slides with semicircle pendulum rod power is connected, set up with one heart between the semicircle pendulum rod, the diameter of semicircle pendulum rod diminishes gradually, and is relative diameter between semicircle pendulum rod and the side swing rod is the same, and is corresponding be provided with between semicircle pendulum rod and the side swing rod and enable relative pivoted revolution mechanic each other, crisscross the setting be provided with between semicircle pendulum rod and the side swing rod and can make crisscross setting relative pivoted crisscross revolution mechanic between semicircle pendulum rod and the side swing rod.
According to the technical scheme, the rotating structure comprises a swing matching motor fixedly arranged in the semicircular oscillating bar, and the swing matching motor is in power connection with the side oscillating bar on one side of the semicircular oscillating bar.
According to the technical scheme, the staggered rotating structure comprises a side motor fixedly arranged in the side oscillating rod, an output threaded rod is arranged on one side of the side motor in a power connection mode, and the output threaded rod is fixed with the semicircular oscillating rod located on one side of the side motor.
According to a further technical scheme, the adjusting assembly comprises a side lever in power connection with a side motor in the side swinging rod, which is close to the bottom box body and is closest to the bottom box body, a connecting seat body is arranged on one side of the side lever, the connecting seat body is fixed with the bottom box body, the connecting seat body is in running fit connection with the side lever, a matching motor is arranged in the side lever, and the matching motor drives the connecting seat body to rotate.
According to the technical scheme, the placing device comprises a box inner cavity arranged in the bottom box body, a limiting clamping seat is fixedly arranged on the end wall of the box inner cavity, a fan motor is fixedly arranged on one side of the limiting clamping seat, a heat radiation fan is arranged on one side of the fan motor in a power connection mode, a motor-driven swing sealing plate is arranged on one side of the limiting clamping seat in a rotating mode, and the swing sealing plate seals the box inner cavity.
The invention has the beneficial effects that:
the equipment has a simple structure, the equipment adopts a plurality of groups of semi-circular ring structures, and the turning and folding of the semi-circular ring structures are combined, so that the equipment is tightly attached to the top space in a folded state, and can be unfolded to form a structure with higher height, and the single semi-circular ring can be independently disassembled and replaced, so that the equipment is convenient to use, the equipment space is saved, and the longest length is prolonged in a mode of saving the most space.
When the projector is in an initial state, the device, the assembly and the structure are in a stop working state, the equipment can be folded to form a structure with a small occupied area, and the longest extension distance can be realized by the most economical space design when the equipment is unfolded, so that the projector in the inner cavity of the box body can better project when in use and can be retracted to the top of the indoor when being folded and stored.
When the equipment works, firstly, the movable motor works to drive the output threaded rod to rotate, the output threaded rod rotates to drive the sliding fit box body to move, so that the sliding fit box body moves to the central position in the inner cavity, the side built-in motor works to drive the semicircular swing rods to swing, the swing fit motor works to drive the side swing rods to swing, and simultaneously, the side motor drives the output threaded rod to drive the semicircular swing rods which are arranged in a staggered mode to swing, so that the bottom box body is lifted to a certain height after all the semicircular swing rods and the side swing rods swing, and the side rods and the connecting base body rotate to enable the projector in the bottom box body to swing, so that the projection is more accurate, and the inner cavity of the box body can be sealed after the swing sealing plate is turned over, after the fan motor works, the cooling fan is driven to rotate, and the projector in the inner cavity of the box body can be cooled.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
FIG. 1 is a schematic diagram of an internal overall structure of a multimedia teaching apparatus according to the present invention;
FIG. 2 is a side view of the bottom housing of FIG. 1;
FIG. 3 is a schematic view of the drive of the traveling motor of FIG. 1;
FIG. 4 is an expanded schematic view of the apparatus of FIG. 1;
in the figure, a side swing rod 11, a swing matching motor 12, a bottom box 14, a side rod 15, an inner cavity 16, a semicircular swing rod 18, a side built-in motor 21, a sliding matching box 22, a mounting rack 23, a side motor 24, an output threaded rod 25, a connecting seat body 31, a swing closing plate 32, a limiting clamping seat 33, a box inner cavity 34, a fan motor 35 and a cooling fan 36.
Detailed Description
As shown in fig. 1 to 4, the present invention is explained in detail, and for convenience of description, the following orientations are defined as follows: the following up-down, left-right, front-back direction is consistent with the up-down, left-right, front-back direction of the projection relation of the device in the figure 1, the device for multimedia teaching of the invention comprises a mounting frame 23, an inner cavity 16 with an opening is arranged in the mounting frame 23, a sliding fit box body 22 is arranged in the inner cavity 16 in a sliding way, an output threaded rod 25 is arranged between the end walls at the two sides of the inner cavity 16 in a rotating way, the output threaded rod 25 is in threaded fit connection with the sliding fit box body 22, a moving motor 13 is fixedly arranged at one side of the mounting frame 23, the moving motor 13 is in power connection with the output threaded rod 25, a bottom box body 14 is arranged at one side of the mounting frame 23, a swing adjusting device which can save the unfolding and folding space of the device and can adjust, a placing device for placing a projector is arranged in the bottom box 14.
Beneficially, the swing adjusting device includes a plurality of semicircular swing rods 18, a side swing rod 11 corresponding to the semicircular swing rods 18 is arranged on one side of each semicircular swing rod 8, a folding and unfolding assembly capable of enabling the semicircular swing rods 18, the side swing rods 11 and the sliding fit boxes 22 to be folded and unfolded is arranged between each semicircular swing rod 18, each side swing rod 11 and each sliding fit box 22, and an adjusting assembly capable of enabling the bottom box 14 to be adjusted in a rotating mode is arranged between the bottom box 14 and each side swing rod 11.
Beneficially, the folding and unfolding assembly includes a side built-in motor 21 fixedly disposed in the sliding fit box 22, the sliding fit box 22 is in power connection with the semicircular swing rods 18, the semicircular swing rods 18 are concentrically disposed, the diameters of the semicircular swing rods 18 are gradually reduced, the diameters of the opposite semicircular swing rods 18 and the opposite side swing rods 11 are the same, a rotating structure capable of enabling the semicircular swing rods 18 and the side swing rods 11 to rotate relative to each other is disposed between the corresponding semicircular swing rods 18 and the corresponding side swing rods 11, and a staggered rotating structure capable of enabling the semicircular swing rods 18 and the side swing rods 11 to rotate relative to each other is disposed between the semicircular swing rods 18 and the side swing rods 11 which are staggered.
Advantageously, the rotating structure comprises a swing matching motor 12 fixed in the semi-circular swing link 18, and the swing matching motor 12 is in power connection with the side swing rod 11 on one side of the semi-circular swing link 18.
Advantageously, the staggered rotating structure comprises a side motor 24 fixed in the side oscillating rod 11, an output threaded rod 25 is arranged on one side of the side motor 24 in a power connection mode, and the output threaded rod 25 is fixed with the semicircular oscillating rod 18 on one side of the side motor 24.
Advantageously, the adjusting assembly comprises a side lever 15 in power connection with the side motor 24 in the side oscillating lever 11 closest to the bottom box 14, the side lever 15 being provided on one side with a connection seat 31, the connection seat 31 being fixed to the bottom box 14, the connection seat 31 being in rotationally fitted connection with the side lever 15, the side lever 15 being provided with a cooperating motor therein, the cooperating motor driving the connection seat 31 to rotate.
Beneficially, the placing device includes a box inner cavity 34 arranged in the bottom box 14, a limiting clamping seat 33 is fixedly arranged on an end wall of the box inner cavity 34, a fan motor 35 is fixedly arranged on one side of the limiting clamping seat 33, a heat radiation fan 36 is dynamically connected to one side of the fan motor 35, a swing closing plate 32 driven by a motor is rotatably arranged on one side of the limiting clamping seat 33, and the swing closing plate 32 closes the box inner cavity 34.
In the initial state, the above devices, components and structures are in the working stop state, the device can be folded to form a structure with a small occupied area, and the longest extension distance can be realized by the most economical space design when the device is unfolded, so that the projector in the inner cavity 34 of the box body can better project when in use and can be retracted to the top of the room when folded and stored.
When the device works, firstly, the moving motor 13 drives the output threaded rod 25 to rotate after working, the output threaded rod 25 drives the sliding fit box 22 to move after rotating, so that the sliding fit box 22 moves to the central position in the inner cavity 16, the side built-in motor 21 drives the semi-circular swing rods 18 to swing after working, the swing fit motor 12 drives the side swing rods 11 to swing after working, meanwhile, the side motor 24 drives the output threaded rod 25 to drive the semi-circular swing rods 18 which are arranged in a staggered mode to swing, so that after all the semi-circular swing rods 18 and the side swing rods 11 swing, the bottom box 14 is lifted to a certain height, and after the side rods 15 and the seat body 31 are connected to rotate, a projector in the bottom box 14 can swing, so that the projection is more accurate, after the swing closing plate 32 is turned over, the inner cavity 34 of the box body can be closed, and after the fan motor 35 works, the heat dissipation fan 36 is driven to rotate, so that heat can be dissipated from the projector in the inner cavity 34 of the box body.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (7)

1. The utility model provides a multimedia teaching equipment, includes the mounting bracket, be provided with the open-ended inner chamber in the mounting bracket, the gliding cooperation box that slides that is provided with in the inner chamber, the pivoted is provided with the output threaded rod between the end wall of inner chamber both sides, the output threaded rod with the cooperation box screw-thread fit that slides is connected, mounting bracket one side has set firmly traveling motor, traveling motor with output threaded rod power is connected, mounting bracket one side is provided with the bottom box, the bottom box with it can practice thrift equipment expansion folding space and make to be provided with between the cooperation box that slides the flexible swing adjustment device of bottom box can wider regulation, be provided with the placer that is used for placing projection instrument in the bottom box.
2. A multimedia teaching apparatus according to claim 1, wherein: swing adjusting device includes a plurality of semicircle pendulum rods, semicircle pendulum rod one side be provided with the side swing arm that the semicircle pendulum rod corresponds, be provided with between semicircle pendulum rod, side swing arm and the cooperation box that slides and to make semicircle pendulum rod, side swing arm and the cooperation box that slides carry out the folding subassembly that expandes that fold between the box that expandes, the bottom box with be provided with between the side swing arm and to make the bottom box rotates the adjusting part who adjusts.
3. A multimedia teaching apparatus according to claim 2, wherein: folding expansion subassembly including set firmly in the side built-in motor in the cooperation box that slides, the cooperation box that slides with semicircle pendulum rod power is connected, set up with one heart between the semicircle pendulum rod, the diameter of semicircle pendulum rod diminishes gradually, and is relative diameter between semicircle pendulum rod and the side swing rod is the same, and is corresponding be provided with between semicircle pendulum rod and the side swing rod and enable relative pivoted rotating-structure each other, crisscross the setting be provided with between semicircle pendulum rod and the side swing rod and can make crisscross setting relative pivoted crisscross rotating-structure between semicircle pendulum rod and the side swing rod.
4. A multimedia teaching apparatus according to claim 3, wherein: the rotating structure comprises a swing matching motor fixedly arranged in the semicircular swing rod, and the swing matching motor is in power connection with the side swing rod on one side of the semicircular swing rod.
5. A multimedia teaching apparatus according to claim 3, wherein: the staggered rotating structure comprises a side motor fixedly arranged in the side oscillating rod, an output threaded rod is arranged on one side of the side motor in a power connection mode, and the output threaded rod is fixed with the semicircular oscillating rod on one side of the side motor.
6. A multimedia teaching apparatus according to claim 2, wherein: the adjusting assembly comprises a side rod which is in power connection with a side motor in the side swing rod and is closest to the bottom box body, a connecting seat body is arranged on one side of the side rod and is fixed with the bottom box body, the connecting seat body is in running fit connection with the side rod, a matching motor is arranged in the side rod, and the matching motor drives the connecting seat body to rotate.
7. A multimedia teaching apparatus according to claim 1, wherein: the placing device comprises a box inner cavity arranged in the bottom box body, a limiting clamping seat is fixedly arranged on the end wall of the box inner cavity, a fan motor is fixedly arranged on one side of the limiting clamping seat, a heat radiation fan is arranged on one side of the fan motor in a power connection mode, a swing sealing plate driven by a motor is arranged on one side of the limiting clamping seat in a rotating mode, and the swing sealing plate seals the box inner cavity.
CN202010531922.0A 2020-06-11 2020-06-11 Multimedia teaching equipment Expired - Fee Related CN111637328B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010531922.0A CN111637328B (en) 2020-06-11 2020-06-11 Multimedia teaching equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010531922.0A CN111637328B (en) 2020-06-11 2020-06-11 Multimedia teaching equipment

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Publication Number Publication Date
CN111637328A true CN111637328A (en) 2020-09-08
CN111637328B CN111637328B (en) 2021-08-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112291403A (en) * 2020-12-15 2021-01-29 浙江广厦建设职业技术大学 English teaching cell phone stand

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1686418A1 (en) * 2005-01-26 2006-08-02 Audipack Verkoop B.V. In height or otherwise adjustable device for mounting of a projection device.
US20110260015A1 (en) * 2010-04-27 2011-10-27 Elmo Co., Ltd. Visual presenting apparatus
CN203010157U (en) * 2012-12-27 2013-06-19 Tcl集团股份有限公司 Wall-hung support for liquid crystal display device
CN204129975U (en) * 2014-11-25 2015-01-28 张晶 The projector that management drop loss uses
CN207038123U (en) * 2017-08-17 2018-02-23 上海奥帆多媒体科技有限公司 A kind of museum's multimedia projector
CN208719730U (en) * 2018-08-28 2019-04-09 江西工程学院 A kind of transparent university English multifunctional learning machine support

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1686418A1 (en) * 2005-01-26 2006-08-02 Audipack Verkoop B.V. In height or otherwise adjustable device for mounting of a projection device.
US20110260015A1 (en) * 2010-04-27 2011-10-27 Elmo Co., Ltd. Visual presenting apparatus
CN203010157U (en) * 2012-12-27 2013-06-19 Tcl集团股份有限公司 Wall-hung support for liquid crystal display device
CN204129975U (en) * 2014-11-25 2015-01-28 张晶 The projector that management drop loss uses
CN207038123U (en) * 2017-08-17 2018-02-23 上海奥帆多媒体科技有限公司 A kind of museum's multimedia projector
CN208719730U (en) * 2018-08-28 2019-04-09 江西工程学院 A kind of transparent university English multifunctional learning machine support

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112291403A (en) * 2020-12-15 2021-01-29 浙江广厦建设职业技术大学 English teaching cell phone stand

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Effective date of registration: 20210714

Address after: 252000 room 218, 2nd floor, jinrunyuan Street office building, Huanghe Road, high tech Zone, Liaocheng City, Shandong Province

Applicant after: Liaocheng nut Education Technology Co.,Ltd.

Address before: 241009 11-8, Changjiang North Road, Jiujiang District, Wuhu City, Anhui Province

Applicant before: Yu Suxiang

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Granted publication date: 20210813