CN112519456A - Foldable intelligent blackboard and system thereof - Google Patents
Foldable intelligent blackboard and system thereof Download PDFInfo
- Publication number
- CN112519456A CN112519456A CN202011495898.6A CN202011495898A CN112519456A CN 112519456 A CN112519456 A CN 112519456A CN 202011495898 A CN202011495898 A CN 202011495898A CN 112519456 A CN112519456 A CN 112519456A
- Authority
- CN
- China
- Prior art keywords
- blackboard
- seat
- display
- shaft
- groove
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
- A47B97/04—Easels or stands for blackboards or the like
- A47B97/06—Easels or stands for blackboards or the like with means for balancing weight of blackboards or the like, e.g. connected to wall
-
- 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
- G09B5/06—Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
- G09B5/065—Combinations of audio and video presentations, e.g. videotapes, videodiscs, television systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a foldable intelligent blackboard and a system thereof, wherein the foldable intelligent blackboard comprises: a first blackboard and a second blackboard are arranged on two sides of the front surface of the display; the middle of the back of the display is provided with a mounting seat; two sides of the mounting seat are respectively provided with a connecting seat; a sliding seat is slidably arranged on the connecting seat; the sliding seat is connected with the first blackboard/the second blackboard through a connecting rod; the driving motor drives the first blackboard/the second blackboard to rotate along the pin shaft through the sliding seat and the connecting rod. According to the blackboard-writing device, the blackboard capable of writing on both sides is arranged on the front face of the display, and the blackboard is driven to rotate through the motor and the lead screw connecting rod structure, so that the blackboard-writing can be performed by the blackboard when the display is not used, the display is prevented from being exposed for a long time, dust accumulation of the display is avoided, and the display can be protected.
Description
Technical Field
The invention belongs to the technical field of education equipment, and particularly relates to a foldable intelligent blackboard and a system thereof.
Background
The intelligent blackboard usually comprises an electronic flat plate and a writing plate which are formed in a splicing mode, the electronic flat plate can be operated in a touch mode to present teaching contents in modes of pictures, videos and the like, and the writing plate can be used for teachers to write on the electronic flat plate and present the teaching contents in a blackboard-writing mode. Dull and stereotyped and the clipboard combination of electron can realize traditional teaching and the combination of electronic teaching, promotes the teaching effect.
Traditional wisdom blackboard is that there is a writing blackboard in the both sides of display fixed mounting respectively, and wisdom blackboard is when not using, and the display exposes outside, and easy deposition or damage for solving this problem, designs a folding wisdom blackboard now.
Disclosure of Invention
The invention aims to provide a foldable intelligent blackboard and a system thereof.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a foldable intelligent blackboard which comprises a display, wherein a first blackboard and a second blackboard are arranged on two sides of the front surface of the display; the middle of the back of the display is provided with a mounting seat; two sides of the mounting seat are respectively provided with a connecting seat; a sliding seat is slidably arranged on the connecting seat; the sliding seat is connected with the first blackboard/the second blackboard through a connecting rod; wherein, both sides of the upper and lower end surfaces of the display are provided with a pin shaft; a sliding groove is formed in the middle of one surface of the connecting seat; two opposite side surfaces of the sliding groove are respectively provided with a limiting groove; a driving motor is arranged in the middle of one side face of the sliding groove; a screw rod and a screw rod are fixed on a rotating shaft of the driving motor; the sliding seat is in sliding fit with the sliding groove; two opposite side surfaces of the sliding seat are respectively provided with a limiting column; the limiting column is in sliding fit with the limiting groove; the upper surface of the sliding seat is provided with a through groove; a screw hole of the screw rod is formed in one side surface of the sliding seat; the screw hole of the screw rod is meshed with the screw rod of the screw rod; the other side surface of the sliding seat is provided with a connecting groove; the connecting groove is hinged with one end of the connecting rod; the lower ends of the front and back surfaces of the first blackboard are provided with a first object placing plate; the upper end of the back of the first blackboard is provided with a first baffle; the upper end and the lower end of one side of the first blackboard are respectively provided with a first connecting plate; the upper surface of the first connecting plate is provided with a first shaft hole; the first shaft hole is in hinged fit with a pin shaft on the left side of the display; a first shaft seat is arranged on one side surface of the first blackboard; the first shaft seat is hinged with the other end of the connecting rod; the lower ends of the front and back surfaces of the second blackboard are provided with a second object placing plate; a second baffle is arranged at the upper end of the back of the second blackboard; the upper end and the lower end of one side of the second blackboard are respectively provided with a second connecting plate; a second shaft hole is formed in the upper surface of the second connecting plate; the second shaft hole is in hinged fit with a pin shaft on the right side of the display; a second shaft seat is arranged on one side surface of the second blackboard; the second shaft seat is hinged with the other end of the connecting rod; the driving motor drives the first blackboard/the second blackboard to rotate along the pin shaft through the sliding seat and the connecting rod.
Furthermore, two opposite side surfaces of the display are both arc surfaces; and the middle of two sides of the back of the display is respectively provided with a groove.
Furthermore, a limiting nut is meshed at the top of the screw rod and the screw rod.
Furthermore, the front and back surfaces of the first blackboard and the second blackboard are both writing boards.
Furthermore, a first article holding groove is formed in the upper surface of the first article holding plate; the upper surface of the second object placing plate is provided with a second object placing groove.
Furthermore, a semicircular positioning groove is formed in one side face of the first blackboard; a semicircular positioning strip is arranged on one side surface of the second blackboard; the semicircular positioning groove is matched with the semicircular positioning strip.
Furthermore, connecting shafts are arranged at two ends of the connecting rod; connecting holes matched with the connecting shaft are respectively formed in the two opposite side surfaces of the connecting groove; two opposite side surfaces of the first shaft seat are provided with first through holes matched with the connecting shaft; and second through holes matched with the connecting shaft are formed in two opposite side surfaces of the second shaft seat.
Furthermore, the mounting seat is of an I-shaped structure, and a fixing plate is arranged in the middle of the mounting seat; a plurality of fixing holes are arranged on one surface of the fixing plate side by side; the fixing holes are matched with the fixing bolts to fix the display on the wall surface.
A control system of a foldable intelligent blackboard comprises a controller and a control panel; the control panel transmits a control signal to the controller, and the controller controls the operation of the driving motor according to the control signal; the controller is also electrically connected with an infrared sensor and a timer respectively; the timer transmits a standard clock signal to the controller; the infrared sensor senses a human body signal in front of the display; when the infrared sensor does not sense a human body signal within 10min, the controller controls the driving motor to operate to select the first blackboard and the second blackboard from the display.
The invention has the following beneficial effects:
according to the blackboard-writing device, the blackboard capable of writing on both sides is arranged on the front face of the display, and the blackboard is driven to rotate through the motor and the lead screw connecting rod structure, so that the blackboard-writing can be performed by the blackboard when the display is not used, the display is prevented from being exposed for a long time, dust accumulation of the display is avoided, and the display can be protected.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a foldable intelligent blackboard in a folded state;
FIG. 2 is a schematic view of a foldable intelligent blackboard;
FIG. 3 is a schematic view of the foldable intelligent blackboard in an unfolded state;
FIG. 4 is a schematic diagram of a display;
FIG. 5 is a schematic view showing the front view angle of the first blackboard;
FIG. 6 is a schematic structural view of a rear view angle of the first blackboard;
FIG. 7 is a structural view showing a front view angle of a second blackboard;
FIG. 8 is a structural illustration of a second blackboard rear view angle;
FIG. 9 is a schematic structural view of the slider;
FIG. 10 is a schematic view of a connecting rod;
fig. 11 is a system block diagram of a control system of a foldable intelligent blackboard.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1-10, the present invention is a foldable intelligent blackboard, which includes a display 1, a first blackboard 3 and a second blackboard 4 disposed on two sides of the front of the display 1; the middle of the back of the display 1 is provided with a mounting seat 7; two sides of the mounting seat 7 are respectively provided with a connecting seat 2; a sliding seat 5 is arranged on the connecting seat 2 in a sliding way; the sliding seat 5 is connected with the first blackboard 3/the second blackboard 4 through a connecting rod 6; the driving motor 203 drives the first blackboard 3/the second blackboard 4 to rotate along the pin shaft 101 through the sliding seat 5 and the connecting rod 6; the front and back sides of the first blackboard 3 and the second blackboard 4 are writing boards;
as shown in fig. 4, two sides of the upper and lower end surfaces of the display 1 are respectively provided with a pin 101; two opposite side surfaces of the display 1 are arc surfaces 102; the middle of two sides of the back of the display 1 is respectively provided with a groove 103; the mounting seat 7 is of an I-shaped structure, and a fixing plate 701 is arranged in the middle of the mounting seat 7; a plurality of fixing holes 702 are arranged in parallel on one surface of the fixing plate 701; the fixing holes 702 are matched with the fixing bolts to fix the display 1 on the wall surface;
a chute 201 is arranged in the middle of one surface of the connecting seat 2; two opposite side surfaces of the sliding chute 201 are respectively provided with a limiting groove 202; a driving motor 203 is arranged in the middle of one side surface of the sliding chute 201; a screw rod 204 is fixed on the rotating shaft of the driving motor 203; the top of the screw rod 204 is engaged with a limit nut 205;
wherein, as shown in fig. 9-10, the sliding seat 5 is in sliding fit with the sliding groove 201; two opposite side surfaces of the sliding base 5 are respectively provided with a limiting column 505; the limiting column 505 is in sliding fit with the limiting groove 202; the upper surface of the sliding seat 5 is provided with a through groove 501; one side surface of the sliding seat 5 is provided with a screw rod screw hole 502; the lead screw hole 502 is engaged with the lead screw 204; the other side surface of the sliding seat 5 is provided with a connecting groove 503; connecting holes 504 matched with the connecting shaft 601 are respectively arranged on two opposite side surfaces of the connecting groove 503; the connecting groove 503 is hinged with one end of the connecting rod 6; connecting shafts 601 are arranged at two ends of the connecting rod 6;
as shown in fig. 5-6, the lower ends of the front and back sides of the first blackboard 3 are provided with a first object placing plate 301; the upper surface of the first object placing plate 301 is provided with a first object placing groove 3011; the upper end of the back of the first blackboard 3 is provided with a first baffle plate 302; the upper end and the lower end of one side of the first blackboard 3 are respectively provided with a first connecting plate 303; the upper surface of the first connecting plate 303 is provided with a first shaft hole 304; the first shaft hole 304 is hinged and matched with the pin shaft 101 on the left side of the display 1; a first shaft seat 305 is arranged on one side surface of the first blackboard 3; the first shaft base 305 is hinged with the other end of the connecting rod 6; a semicircular positioning groove 307 is formed in one side surface of the first blackboard 3; two opposite side surfaces of the first shaft seat 305 are provided with first through holes 306 matched with the connecting shaft 601;
as shown in fig. 7-8, the lower ends of the front and back sides of the second blackboard 4 are provided with a second object placing plate 401; a second object holding groove 4011 is formed on the upper surface of the second object holding plate 401; the upper end of the back of the second blackboard 4 is provided with a second baffle 402; the upper end and the lower end of one side of the second blackboard 4 are respectively provided with a second connecting plate 403; a second shaft hole 404 is formed in the upper surface of the second connecting plate 403; the second shaft hole 404 is hinged and matched with the pin shaft 101 on the right side of the display 1; a second shaft seat 405 is arranged on one side surface of the second blackboard 4; the second shaft seat 405 is hinged with the other end of the connecting rod 6; (ii) a Second through holes 406 which are matched with the connecting shaft 601 are formed in two opposite side surfaces of the second shaft seat 405; a semicircular positioning strip 407 is arranged on one side surface of the second blackboard 4; the semicircular positioning groove 307 is matched with the semicircular positioning strip 407;
as shown in fig. 11, a control system of a foldable intelligent blackboard includes a controller and a control panel; the control panel transmits a control signal to the controller, and the controller controls the operation of the driving motor 203 according to the control signal; the controller is also electrically connected with an infrared sensor and a timer respectively; the timer transmits a standard clock signal to the controller; the infrared sensor senses a human body signal in front of the display 1; when the infrared sensor does not sense the human body signal within 10min, the controller controls the driving motor 203 to operate to select the first blackboard 3 and the second blackboard 4 to the display 1.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The utility model provides a folding wisdom blackboard, includes display (1), its characterized in that: a first blackboard (3) and a second blackboard (4) are arranged on two sides of the front surface of the display (1); the middle of the back surface of the display (1) is provided with a mounting seat (7); two sides of the mounting seat (7) are respectively provided with a connecting seat (2); a sliding seat (5) is slidably mounted on the connecting seat (2); the sliding seat (5) is connected with the first blackboard (3)/the second blackboard (4) through a connecting rod (6);
wherein, two sides of the upper and lower end surfaces of the display (1) are respectively provided with a pin shaft (101);
a sliding groove (201) is arranged in the middle of one surface of the connecting seat (2); two opposite side surfaces of the sliding groove (201) are respectively provided with a limiting groove (202); a driving motor (203) is arranged in the middle of one side surface of the sliding chute (201); a screw rod (204) is fixed on a rotating shaft of the driving motor (203);
the sliding seat (5) is in sliding fit with the sliding groove (201); two opposite side surfaces of the sliding seat (5) are respectively provided with a limiting column (505); the limiting column (505) is in sliding fit with the limiting groove (202); a through groove (501) is formed in the upper surface of the sliding seat (5); a screw rod screw hole (502) is formed in one side face of the sliding seat (5); the screw rod screw hole (502) is meshed with the screw rod screw (204); the other side surface of the sliding seat (5) is provided with a connecting groove (503); the connecting groove (503) is hinged with one end of the connecting rod (6);
the lower ends of the front and the back of the first blackboard (3) are respectively provided with a first object placing plate (301); the upper end of the back of the first blackboard (3) is provided with a first baffle (302); the upper end and the lower end of one side of the first blackboard (3) are respectively provided with a first connecting plate (303); a first shaft hole (304) is formed in the upper surface of the first connecting plate (303); the first shaft hole (304) is in hinged fit with a pin shaft (101) on the left side of the display (1); a first shaft seat (305) is arranged on one side surface of the first blackboard (3); the first shaft seat (305) is hinged with the other end of the connecting rod (6);
the lower ends of the front and back surfaces of the second blackboard (4) are respectively provided with a second object placing plate (401); the upper end of the back of the second blackboard (4) is provided with a second baffle (402); the upper end and the lower end of one side of the second blackboard (4) are respectively provided with a second connecting plate (403); a second shaft hole (404) is formed in the upper surface of the second connecting plate (403); the second shaft hole (404) is in hinged fit with a pin shaft (101) on the right side of the display (1); a second shaft seat (405) is arranged on one side surface of the second blackboard (4); the second shaft seat (405) is hinged with the other end of the connecting rod (6);
the driving motor (203) drives the first blackboard (3)/the second blackboard (4) to rotate along the pin shaft (101) through the sliding seat (5) and the connecting rod (6).
2. A foldable intelligent blackboard according to claim 1, wherein the two opposite sides of the display (1) are arc surfaces (102); the middle of the two sides of the back of the display (1) is respectively provided with a groove (103).
3. The foldable intelligent blackboard according to claim 1, wherein the top of the lead screw rod (204) is engaged with a limit nut (205).
4. The foldable intelligent blackboard according to claim 1, wherein the front and back sides of the first blackboard (3) and the second blackboard (4) are writing boards.
5. The foldable intelligent blackboard according to claim 1, wherein the first object placing plate (301) has a first object placing slot (3011) on its upper surface; the upper surface of the second object placing plate (401) is provided with a second object placing groove (4011).
6. A foldable intelligent blackboard according to claim 1, wherein a semicircular positioning groove (307) is formed on one side of the first blackboard (3); a semicircular positioning strip (407) is arranged on one side surface of the second blackboard (4); the semicircular positioning groove (307) is matched with a semicircular positioning strip (407).
7. The foldable intelligent blackboard according to claim 4, wherein the connecting rod (6) has connecting shafts (601) at both ends; two opposite side surfaces of the connecting groove (503) are respectively provided with a connecting hole (504) matched with the connecting shaft (601); two opposite side surfaces of the first shaft seat (305) are provided with first through holes (306) matched with the connecting shaft (601); and second through holes (406) matched with the connecting shaft (601) are formed in two opposite side surfaces of the second shaft seat (405).
8. The foldable intelligent blackboard according to claim 1, wherein the installation seat (7) is of an I-shaped structure, and a fixing plate (701) is arranged in the middle of the installation seat (7); a plurality of fixing holes (702) are arranged on one surface of the fixing plate (701) side by side; the fixing holes (702) are matched with the fixing bolts to fix the display (1) on the wall surface.
9. The control system of a foldable intelligent blackboard according to claim 1, including a controller and a control panel; the control panel transmits a control signal to the controller, and the controller controls the operation of the driving motor (203) according to the control signal;
the controller is also electrically connected with an infrared sensor and a timer respectively; the timer transmits a standard clock signal to the controller; the infrared sensor senses a human body signal in front of the display (1);
when the infrared sensor does not sense a human body signal within 10min, the controller controls the driving motor (203) to operate to select the first blackboard (3) and the second blackboard (4) to the display (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011495898.6A CN112519456A (en) | 2020-12-17 | 2020-12-17 | Foldable intelligent blackboard and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011495898.6A CN112519456A (en) | 2020-12-17 | 2020-12-17 | Foldable intelligent blackboard and system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112519456A true CN112519456A (en) | 2021-03-19 |
Family
ID=75001013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011495898.6A Withdrawn CN112519456A (en) | 2020-12-17 | 2020-12-17 | Foldable intelligent blackboard and system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112519456A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113400840A (en) * | 2021-06-04 | 2021-09-17 | 江门职业技术学院 | Preschool education is with teaching show board |
-
2020
- 2020-12-17 CN CN202011495898.6A patent/CN112519456A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113400840A (en) * | 2021-06-04 | 2021-09-17 | 江门职业技术学院 | Preschool education is with teaching show board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6493216B1 (en) | Portable computer with an LCD which can be rotated within 360 degrees | |
| CN112519456A (en) | Foldable intelligent blackboard and system thereof | |
| CN209515125U (en) | A kind of open air new-type billboard | |
| CN203995304U (en) | A kind of based on the rotary triangular prism intelligent blackboard of Electronic Control | |
| WO2023274319A1 (en) | Electronic apparatus | |
| CN201070924Y (en) | Multimedia triangular prism arrangement blackboard | |
| WO2021047302A1 (en) | Display device base and display device | |
| CN111240060A (en) | Liquid crystal writing diaphragm circuit structure, liquid crystal writing diaphragm and liquid crystal writing board thereof | |
| CN202651457U (en) | Electric liquid crystal desktop socket | |
| CN215730598U (en) | A data show shelf for engineering cost | |
| CN214198071U (en) | Intelligent display device | |
| CN208588948U (en) | A kind of frame and interactive intelligent tablet computer | |
| CN201280006Y (en) | Folding blackboard | |
| CN215577194U (en) | Political thought education display device capable of being recycled | |
| CN219916388U (en) | Novel car clock recorder | |
| CN201449288U (en) | Electronic projection scale | |
| CN207662414U (en) | A kind of Multifunctional GPS navigation system for Audi A4L | |
| CN215411771U (en) | Deformable power taking system applicable to goods shelf rails with various sizes | |
| CN216211559U (en) | All-in-one machine with time-sharing reminding function | |
| CN210155882U (en) | Multimedia teaching device for student management | |
| CN211883031U (en) | Wisdom is exhibition support for blackboard | |
| CN213282004U (en) | Angle-adjustable bookshelf | |
| CN215834048U (en) | Device is used in teaching of visual transmission design specialty | |
| CN215954776U (en) | Portable law propaganda show shelf | |
| CN215527191U (en) | Property management publicity column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210319 |