CN113305076B - Energy-saving wisdom advertisement screen cleaning device - Google Patents
Energy-saving wisdom advertisement screen cleaning device Download PDFInfo
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- CN113305076B CN113305076B CN202110647258.0A CN202110647258A CN113305076B CN 113305076 B CN113305076 B CN 113305076B CN 202110647258 A CN202110647258 A CN 202110647258A CN 113305076 B CN113305076 B CN 113305076B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 64
- 230000002146 bilateral effect Effects 0.000 claims abstract description 4
- 210000004209 hair Anatomy 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000005485 electric heating Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
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Classifications
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- B08B1/32—
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- B08B1/12—
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- B08B1/30—
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
Abstract
The invention discloses an energy-saving intelligent advertisement screen cleaning device which comprises a top seat, wherein the rear side of the bottom of the top seat is connected with two resistance rods, the two resistance rods are arranged in a bilateral symmetry manner, the lower ends of the resistance rods are movably sleeved with limiting plates, the rear parts of the limiting plates are in threaded connection with lead screws, the upper ends of the lead screws are rotatably connected with the bottom of the top seat through bearings, the front side of the top of each limiting plate is connected with a bearing seat, the front side of the bottom of the top seat is provided with an assembling groove, an advertisement screen is arranged between the assembling groove and the two bearing seats, the left side wall and the right side wall of the top seat are connected with supporting arms, and one ends, close to the two supporting arms, of the two supporting arms are symmetrically connected with cleaning components; the screen cleaning device is reasonable in structural design, is beneficial to reminding operators of adjusting and correcting in time during installation and maintenance, has a good energy-saving effect, is simple and convenient to operate, and is beneficial to improving the working efficiency of screen cleaning.
Description
Technical Field
The invention relates to the technical field of intelligent screen related equipment, in particular to an energy-saving intelligent advertisement screen cleaning device.
Background
The smart screen is one of the televisions, but it should be noted that the smart screen is not only a television but also a "smart entrance" that can connect more living scenes, that is, the smart screen can be a control center of a smart home, and the smart home at home can be controlled through the television. The intelligent screen plays the role of an intelligent home control manager, and is also an information sharing center and a multi-device interaction center, namely the intelligent screen is not a television in the traditional sense, so that the intelligent screen is complete in function and attractive. The release of the intelligent screen opens the future intelligent era of televisions. Unlike a common television, the smart screen only watches the television, can integrate the functions of the television, a computer and a mobile phone tablet, and can be used as a core of smart home.
Wisdom advertisement screen is put by wide application in the advertisement, and in the in-service use in-process, its screen outside can produce more dust along with time accumulation, and the attached tiny particulate matter of screen surface can influence its display effect, for this reason, we provide an energy-saving wisdom advertisement screen cleaning device.
Disclosure of Invention
The invention aims to provide an energy-saving intelligent advertisement screen cleaning device to overcome the technical problems in the prior art.
In order to achieve the technical purpose and achieve the technical effect, the invention provides the following technical scheme:
the utility model provides an energy-saving wisdom advertisement screen cleaning device, includes the footstock, the bottom rear side of footstock is connected with two resistance poles, two resistance pole bilateral symmetry sets up, the lower extreme movable sleeve of resistance pole is equipped with the limiting plate, the rear portion spiro union of limiting plate has the lead screw, the footstock bottom is connected through the bearing rotation in the lead screw upper end, the top front side of limiting plate is connected with accepts the seat, the bottom front side of footstock is seted up the assembly groove, the advertisement screen is installed to assembly groove and two between accepting the seat, the left and right sides wall of footstock is connected with the support arm, two the one end symmetric connection that the support arm is close to mutually has clean subassembly.
Preferably, among an energy-saving wisdom advertisement screen cleaning device, clean subassembly includes the electric putter of rigid coupling support arm, electric putter's expansion end is connected with the level seat, the upper and lower both ends symmetric connection of level seat has the telescopic link, be equipped with reset spring in the telescopic link, the expansion end of telescopic link is connected with the elevator, install the motor on the elevator, the rear side power take off end of motor is connected with the cleaning brush, the preceding terminal surface of cleaning brush butt advertisement screen, the outer wall connection of elevator has permanent magnetism piece, the outer wall connection of level seat has the electro-magnet.
Preferably, in the energy-saving intelligent advertisement screen cleaning device, the telescopic rod comprises an outer sleeve and an inner rod, a guide groove is formed in the inner side wall of the outer sleeve, a sliding block is connected in the guide groove in a sliding manner, one end, extending out of the guide groove, of the sliding block is fixedly connected with the outer wall of the inner rod, one end, extending into the outer sleeve, of the inner rod is connected with a return spring, and the other end of the return spring is fixedly connected with the outer sleeve.
Preferably, in an energy-saving intelligent advertisement screen cleaning device, a pulse controller is installed on the horizontal seat, the pulse controller converts an output signal of a circuit where the pulse controller is located into an intermittent signal, and the pulse controller is electrically connected with the electromagnet.
Preferably, in an energy-saving wisdom advertisement screen cleaning device, the brush hair of cleaning brush adopts flexible material to make, cleaning brush and motor output demountable installation.
Preferably, in the energy-saving intelligent advertisement screen cleaning device, the electromagnet and the permanent magnet block have the same magnetic pole on the side close to the electromagnet.
Preferably, in the energy-saving intelligent advertisement screen cleaning device, a mounting opening is formed in the upper portion of the bearing seat, a conductive rod is inserted into the lower portion of the bearing seat, the rear end of the conductive rod abuts against the resistance rod, an insulating sleeve is installed between the conductive rod and the bearing seat, an ammeter is installed at the front end of the supporting arm, and the ammeter, the resistance rod and the conductive rod are connected in series in the same circuit on the same side.
Preferably, among the energy-saving intelligent advertisement screen cleaning device, the top of footstock is connected with the solar photovoltaic board, the solar photovoltaic board is connected with storage battery, two through charge-discharge controller resistance pole parallel access storage battery, be equipped with the treater on the footstock, treater one side is equipped with wireless signal receiver, wireless signal receiver receives the instruction that mobile terminal sent and transmits to the treater through wireless WIFI.
Compared with the prior art, the invention has the beneficial effects that:
1. the advertising screen is arranged between the assembling groove and the bearing seats, the height of the limiting plate can be adjusted by rotating the lead screw, the bearing seats can be lifted synchronously along with the limiting plate, the inner wall of the installing port can be abutted against the bottom corner of the advertising screen, the conductive rod is abutted against the outer wall of the resistance rod, so that the resistance rod is adjusted to serve as a resistance access circuit, the current of the two resistance rod access circuits is measured through the ammeter, when the difference value of the readings of the two ammeters is larger than a set error, the two bearing seats are not at the same height, the advertising screen is inclined, and an operator can be reminded to adjust and correct in time during installation and maintenance;
2. the solar photovoltaic panel absorbs light energy and converts the light energy into electric energy, the charging and discharging controller is stored in the storage battery pack, the electric energy is conveniently used by electric components in equipment, a good energy-saving effect is achieved, the wireless signal receiver receives an instruction sent by the mobile terminal through wireless WIFI and transmits the instruction to the processor, the operation of each component is conveniently controlled, and the operation is simple and convenient;
3. according to the invention, the motor drives the cleaning brush to rotate, the brush hair of the cleaning brush can be attached to the surface of a screen for cleaning, the electric push rod is utilized to drive the horizontal seat to move in the cleaning process, the transverse position of the cleaning brush can be adjusted, the electromagnet is electrified for processing, and after electrification and magnetization, mutually repulsive acting force can be generated and is greater than the elastic action of the reset spring, so that the inner inserted rod extends out along the outer sleeve, the relative distance between the lifting block and the horizontal seat is increased, and the cleaning area of the cleaning brush can be increased;
4. the invention utilizes the pulse controller to convert the circuit output signal flowing into the electromagnet into an intermittent signal, so that the electromagnet can be electrified in a clearance way, when the electromagnet is powered off, the reset spring elastically resets, the lifting block can radially move along with the electromagnet, the cleaning area of the cleaning brush in unit time is increased, and the working efficiency of cleaning a screen is favorably improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a first overall structural diagram of the present invention;
FIG. 2 is a second overall structural diagram of the present invention;
FIG. 3 is a schematic view of a cleaning assembly of the present invention;
FIG. 4 is a schematic structural diagram of a limiting plate according to the present invention;
fig. 5 is a schematic view of the internal structure of the telescopic rod of the present invention.
In the figure: 1. a top seat; 2. a resistance rod; 3. a limiting plate; 4. a screw rod; 5. a bearing seat; 6. assembling a groove; 7. an advertising screen; 8. a support arm; 9. a cleaning assembly; 10. a solar photovoltaic panel; 11. a battery pack; 12. a processor; 13. a wireless signal receiver; 501. an installation port; 502. a conductive rod; 503. an insulating sleeve; 801. an ammeter; 901. an electric push rod; 902. a horizontal base; 903. a telescopic rod; 904. a return spring; 905. a lifting block; 906. a motor; 907. a cleaning brush; 908. a permanent magnet block; 909. an electromagnet; 9021. a pulse controller; 9031. an outer sleeve; 9032. an inner inserted rod; 9033. a guide groove; 9034. a slide block.
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.
Example one
Please refer to fig. 1-5, the embodiment is an energy-saving intelligent advertisement screen cleaning device, which includes a top seat 1, two resistance rods 2 are connected to the rear side of the bottom of the top seat 1, the two resistance rods 2 are arranged in bilateral symmetry, a limiting plate 3 is movably sleeved on the lower end of the resistance rods 2, a screw rod 4 is screwed on the rear portion of the limiting plate 3, the upper end of the screw rod 4 is rotatably connected to the bottom of the top seat 1 through a bearing, the front side of the top of the limiting plate 3 is connected to a bearing seat 5, an assembling groove 6 is arranged on the front side of the bottom of the top seat 1, an advertisement screen 7 is installed between the assembling groove 6 and the two bearing seats 5, the left and right side walls of the top seat 1 are connected to support arms 8, and one end of the two support arms 8 close to each other is symmetrically connected to a cleaning component 9.
The upper part of the bearing seat 5 is provided with a mounting port 501, the lower part of the bearing seat 5 is inserted with a conductive rod 502, the rear end of the conductive rod 502 is abutted against the resistance rod 2, an insulating sleeve 503 is arranged between the conductive rod 502 and the bearing seat 5, the front end of the supporting arm 8 is provided with an ammeter 801, and the ammeter 801, the resistance rod 2 and the conductive rod 502 on the same side are connected in series in the same circuit.
The top of footstock 1 is connected with solar photovoltaic board 10, and solar photovoltaic board 10 is connected with storage battery 11 through charge-discharge controller, and two resistance bars 2 parallelly connected access storage battery 11 are equipped with treater 12 on the footstock 1, and treater 12 one side is equipped with wireless signal receiver 13, and wireless signal receiver 13 receives the instruction that mobile terminal sent and transmits to treater 12 through wireless WIFI
The specific implementation manner of this embodiment is:
in the device, an advertisement screen 7 is arranged between an assembly groove 6 and a bearing seat 5, the height of a limiting plate 4 can be adjusted by rotating a lead screw 4, the bearing seat 5 is lifted synchronously along with the limiting plate 4, the inner wall of an installation opening 501 can be abutted against the bottom corner of the advertisement screen 7, two resistance rods 2 are connected into a storage battery pack 11 in parallel, and a conductive rod 502 is abutted against the outer walls of the resistance rods 2, so that the resistance rods 2 are adjusted to be used as a resistance access circuit, the current of the two resistance rods 2 accessed into the circuit is measured by an ammeter 801, when the reading difference value of the two ammeters is greater than a set error, the two bearing seats 5 are not at the same height, the advertisement screen 7 is inclined, can be adjusted and corrected in time during installation and maintenance, light energy is absorbed and converted into electric energy by a solar photovoltaic panel 10, and is stored in the storage battery pack 11 by a charge-discharge controller, and discharge controllers are convenient for use by electric components in equipment, more energy-conserving, wireless signal receiver 13 receives the instruction that mobile terminal sent and transmits to treater 12 through wireless WIFI, is convenient for control each subassembly operation, and easy operation is convenient.
Example two
On the basis of the first embodiment, the cleaning assembly 9 includes an electric push rod 901 fixedly connected with the support arm 8, the movable end of the electric push rod 901 is connected with a horizontal seat 902, the upper and lower ends of the horizontal seat 902 are symmetrically connected with an expansion link 903, a return spring 904 is arranged in the expansion link 903, the movable end of the expansion link 903 is connected with a lifting block 905, a motor 906 is installed on the lifting block 905, the rear power output end of the motor 906 is connected with a cleaning brush 907, the cleaning brush 907 is abutted to the front end face of the advertisement screen 7, the outer wall of the lifting block 905 is connected with a permanent magnet 908, and the outer wall of the horizontal seat 902 is connected with an electromagnet 909.
The telescopic rod 903 comprises an outer sleeve 9031 and an inner inserting rod 9032, a guide groove 9033 is formed in the inner side wall of the outer sleeve 9031, a sliding block 9034 is connected in the guide groove 9033 in a sliding mode, one end, extending out of the guide groove 9033, of the sliding block 9034 is fixedly connected with the outer wall of the inner inserting rod 9032, one end, extending into the outer sleeve 9031, of the inner inserting rod 9032 is connected with a return spring 904, the other end of the return spring 904 is fixedly connected with the outer sleeve 9031, the sliding block 9034 is matched with the guide groove 9033 to conduct guiding, and the inner inserting rod 903 is convenient to drive the lifting block 905 to vertically lift.
The pulse controller 9021 is installed on the horizontal seat 902, the pulse controller 9021 converts an output signal of a circuit where the pulse controller 9021 is located into an intermittent signal, and the pulse controller 9021 is electrically connected with the electromagnet 909.
The brush hair of cleaning brush 907 adopts flexible material to make, avoids causing the damage to the screen, and cleaning brush 907 and motor 906 output demountable installation are convenient for wash the change.
The electromagnet 909 has the same magnetic pole as the permanent magnet 908 on the side close thereto, and when energized, the magnets repel each other.
The specific implementation manner of this embodiment is:
when dust on the advertisement screen is more, the motor 906 drives the cleaning brush 907 to rotate, brush hairs of the cleaning brush 907 can be attached to the surface of the screen for cleaning, the electric push rod 901 is utilized to drive the horizontal seat 901 to move in the cleaning process, the transverse position of the cleaning brush 907 can be adjusted, meanwhile, the electromagnet 909 is electrified, the magnetic poles of the electromagnet 909 and the permanent magnet 908 close to one side are the same, after electrification and magnetization, a mutually repulsive acting force can be generated, the acting force is larger than the elastic action of the reset spring 904, so that the inner inserted rod 9032 extends out along the outer sleeve 9031, the relative distance between the lifting block 905 and the horizontal seat 902 is increased, the cleaning area of the cleaning brush can be increased, the pulse controller 9021 is electrically connected with the electromagnet 909, a circuit output signal flowing into the electromagnet 909 is converted into an intermittent signal by the pulse controller 9021, and the electromagnet 909 is electrified in a gap, when the electromagnet 909 is powered off, the return spring 904 elastically returns, and the lifting block 905 can radially move along with the return spring, so that the cleaning area of the cleaning brush 907 in unit time is increased, and the working efficiency of screen cleaning is improved.
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 (7)
1. The utility model provides an energy-saving wisdom advertisement screen cleaning device, includes footstock (1), its characterized in that: the anti-theft device is characterized in that the rear side of the bottom of the top seat (1) is connected with two resistance rods (2), the two resistance rods (2) are arranged in a bilateral symmetry mode, a limiting plate (3) is movably sleeved at the lower end of each resistance rod (2), a lead screw (4) is screwed at the rear part of the limiting plate (3), the upper end of the lead screw (4) is connected with the bottom of the top seat (1) in a rotating mode through a bearing, the front side of the top part of the limiting plate (3) is connected with a bearing seat (5), an assembling groove (6) is formed in the front side of the bottom of the top seat (1), an advertising screen (7) is installed between the assembling groove (6) and the two bearing seats (5), the left side wall and the right side wall of the top seat (1) are connected with supporting arms (8), and one ends, close to the two supporting arms (8), are symmetrically connected with cleaning assemblies (9); the cleaning assembly (9) comprises an electric push rod (901) fixedly connected with a support arm (8), the movable end of the electric push rod (901) is connected with a horizontal seat (902), the upper end and the lower end of the horizontal seat (902) are symmetrically connected with telescopic rods (903), a reset spring (904) is arranged in each telescopic rod (903), the movable end of each telescopic rod (903) is connected with a lifting block (905), a motor (906) is installed on each lifting block (905), the rear power output end of each motor (906) is connected with a cleaning brush (907), the cleaning brush (907) is abutted to the front end face of the advertising screen (7), the outer wall of each lifting block (905) is connected with a permanent magnet (908), and the outer wall of each horizontal seat (902) is connected with an electromagnet (909).
2. The device for cleaning intelligent advertisement screen according to claim 1, wherein: the telescopic rod (903) comprises an outer sleeve (9031) and an inner inserting rod (9032), a guide groove (9033) is formed in the inner side wall of the outer sleeve (9031), a sliding block (9034) is connected in the guide groove (9033) in a sliding mode, one end, extending out of the guide groove (9033), of the sliding block (9034) is fixedly connected to the outer wall of the inner inserting rod (9032), one end, extending into the outer sleeve (9031), of the inner inserting rod (9032) is connected with a return spring (904), and the other end of the return spring (904) is fixedly connected with the outer sleeve (9031).
3. The energy-saving intelligent advertisement screen cleaning device according to claim 1, wherein: the horizontal seat (902) is provided with a pulse controller (9021), the pulse controller (9021) enables output signals of a circuit where the pulse controller (9021) is located to be converted into intermittent signals, and the pulse controller (9021) is electrically connected with the electromagnet (909).
4. The energy-saving intelligent advertisement screen cleaning device according to claim 1, wherein: the brush hair of the cleaning brush (907) is made of flexible materials, and the cleaning brush (907) and the output end of the motor (906) are detachably mounted.
5. The device for cleaning intelligent advertisement screen according to claim 1, wherein: the electromagnet (909) and the permanent magnet (908) have the same magnetic pole at the side close to each other.
6. The device for cleaning intelligent advertisement screen according to claim 1, wherein: the improved electric heating coil socket is characterized in that the upper part of the bearing seat (5) is provided with a mounting port (501), the lower part of the bearing seat (5) is inserted with a conductive rod (502), the rear end of the conductive rod (502) is abutted to the resistance rod (2), an insulating sleeve (503) is arranged between the conductive rod (502) and the bearing seat (5), the front end of the supporting arm (8) is provided with an ammeter (801), and the ammeter (801), the resistance rod (2) and the conductive rod (502) are connected in series in the same circuit at the same side.
7. The energy-saving intelligent advertisement screen cleaning device according to claim 1, wherein: the solar photovoltaic panel (10) is connected with at the top of footstock (1), solar photovoltaic panel (10) are connected with storage battery (11), two through charge-discharge controller resistance pole (2) parallel access storage battery (11), be equipped with treater (12) on footstock (1), treater (12) one side is equipped with wireless signal receiver (13), wireless signal receiver (13) receive the instruction that mobile terminal sent and transmit to treater (12) through wireless WIFI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110647258.0A CN113305076B (en) | 2021-06-10 | 2021-06-10 | Energy-saving wisdom advertisement screen cleaning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110647258.0A CN113305076B (en) | 2021-06-10 | 2021-06-10 | Energy-saving wisdom advertisement screen cleaning device |
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| CN113305076A CN113305076A (en) | 2021-08-27 |
| CN113305076B true CN113305076B (en) | 2022-07-26 |
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| CN114992101B (en) * | 2022-03-09 | 2024-03-26 | 上海绩优机电股份有限公司 | Pneumatic diaphragm pump convenient to clean |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109204129A (en) * | 2018-09-28 | 2019-01-15 | 安徽省中车科技有限公司 | A kind of vehicle intelligent tripod |
| CN209439053U (en) * | 2018-11-22 | 2019-09-27 | 张骞 | A kind of open air photovoltaic panel installation and adjustment and cleaning device |
| CN209216474U (en) * | 2018-12-05 | 2019-08-06 | 上海行一广告有限公司 | Outdoor advertising propaganda board |
| CN110102610B (en) * | 2019-05-31 | 2020-07-28 | 佛山市兴威五金有限公司 | Electric balance adjusting device of bending machine |
| CN110639868B (en) * | 2019-10-11 | 2020-10-30 | 义乌市满旺机械设备有限公司 | Quick cleaning device of large-scale display screen |
| CN211455214U (en) * | 2020-02-17 | 2020-09-08 | 广东汉马传媒有限公司 | Over-and-under type advertisement structure |
| CN210984086U (en) * | 2020-04-01 | 2020-07-10 | 江西省博库信息技术有限公司 | Outdoor advertising media display screen with dust removal function |
| CN213003337U (en) * | 2020-07-13 | 2021-04-20 | 连云港师范高等专科学校 | Adjusting device for laser processing |
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Effective date of registration: 20220708 Address after: 518000 floor 1, No. 5, Ganghua factory, A1, No. 27, Yongnan Road, Gangtou Industrial Zone, Yabian community, Shajing street, Bao'an District, Shenzhen, Guangdong Province Applicant after: SHENZHEN PANGU ZHISHOU TECHNOLOGY Co.,Ltd. Address before: 510000 room 01, building 1, Yinsong Sixth Street, No. 3, Yingbin Avenue, Huadu District, Guangzhou, Guangdong Applicant before: Lei Yufeng |
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