CN109681796A - A kind of LED illumination device with light regulatory function - Google Patents
A kind of LED illumination device with light regulatory function Download PDFInfo
- Publication number
- CN109681796A CN109681796A CN201910040074.0A CN201910040074A CN109681796A CN 109681796 A CN109681796 A CN 109681796A CN 201910040074 A CN201910040074 A CN 201910040074A CN 109681796 A CN109681796 A CN 109681796A
- Authority
- CN
- China
- Prior art keywords
- shaft
- protective shell
- reflector
- lamp tube
- led lamp
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/237—Details of housings or cases, i.e. the parts between the light-generating element and the bases; Arrangement of components within housings or cases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/68—Details of reflectors forming part of the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
The present invention relates to a kind of LED illumination devices with light regulatory function, including protective shell and LED lamp tube, the inside of the protective shell is equipped with regulating mechanism, the regulating mechanism includes supporting plate, support shaft, reflector and adjusting component, the adjusting component includes power unit and mobile unit, the mobile unit includes sliding block, rack gear and adjusting rod, the LED illumination device with light regulatory function passes through regulating mechanism, angular adjustment can be carried out to the light that LED lamp tube issues, consequently facilitating adjusting irradiation position as needed, compared with existing regulating mechanism, the regulating mechanism realizes the irradiating angle of LED lamp tube by adjusting the angle of reflector, it is convenient to adjust, improve the practicability of LED illumination device.
Description
Technical field
The present invention relates to LED lamp tube field, in particular to a kind of LED illumination device with light regulatory function.
Background technique
LED lamp tube is also commonly called as light pipe, fluorescent tube, and light source is using LED as illuminator.Traditional fluorescent tube is also known as
Respectively there is a filament at fluorescent lamp, lamp both ends, filled with micro argon and thin mercury vapour in fluorescent tube, are coated with fluorescence on tube inner wall
Powder, when gaseous conduction between two filaments, issue ultraviolet light, and fluorescent powder is made to issue visible light.LED lamp tube has many good qualities, and one
As be used for general lighting, office building, market, restaurant, school, family, the room lightings such as factory.
The irradiating angle of existing LED lamp tube is usually to fix, and can not be adjusted, to be unable to satisfy the need of different users
It asks, adjusts the irradiation position of LED light, to reduce the practicability of LED lamp tube.
Summary of the invention
The technical problem to be solved by the present invention is for overcome the deficiencies in the prior art, providing a kind of with light adjusting
The LED illumination device of function.
The technical solution adopted by the present invention to solve the technical problems is: a kind of LED illumination with light regulatory function
The inside of protective shell, the axis and LED of the protective shell is arranged in equipment, including protective shell and LED lamp tube, the LED lamp tube
The axis of fluorescent tube is parallel, and the inside of the protective shell is equipped with regulating mechanism, and the top of LED lamp tube is arranged in the regulating mechanism；
The regulating mechanism includes supporting plate, support shaft, reflector and adjusts component, and LED lamp tube is arranged in the supporting plate
Top, the supporting plate are fixed in protective shell, and the shape of the vertical cross-section of the reflector is arc-shaped, the circle of the reflector
The center of circle of arc section is located at the lower section of reflector, and the top of the support shaft is fixed on the lower section of supporting plate, the support shaft
The side of the separate LED lamp tube of bottom end and reflector is hinged, the lower section for adjusting component and supporting plate being arranged in, the adjusting component
It is sequentially connected with reflector；
The adjusting component includes power unit and mobile unit, and the top of power unit is arranged in the mobile unit,
The power unit and mobile unit are sequentially connected, and the mobile unit includes sliding block, rack gear and adjusting rod, under the sliding block
Side is fixedly connected with rack gear, and one end of the adjusting rod and sliding block are hinged, and the other end and reflector of the adjusting rod are hinged, institute
Rack gear is stated to connect with power unit.
Preferably, the mobile unit further includes guide rod, the guide rod in order to limit the moving direction of sliding block
Vertical cross-section is U-shaped, and the both ends of the guide rod are each attached to the lower section of supporting plate, and the sliding block is set on guide rod, described
Sliding block is slidably connected with guide rod.
Preferably, in order to which band movable slider is mobile, the power unit include shaft, driving bevel gear, driven wheel of differential,
Transmission shaft and driving gear, the axis of the shaft and the axis of protective shell are vertical, and the side of the protective shell is equipped with through-hole, institute
The one end for stating shaft passes through the outside that protective shell is arranged in through-hole, and the inside of protective shell is arranged in the other end of the shaft, institute
The other end that driving bevel gear is fixed on shaft is stated, the axis of the transmission shaft is vertical with the axis of shaft, described from mantle tooth
Wheel and driving gear are respectively sleeved on the both ends of transmission shaft, and the driven wheel of differential is engaged with driving bevel gear, the rack gear
The lower section of rack gear is set, and the rack gear is engaged with driving gear.
Preferably, in order to give transmission shaft to provide support force, institute's power unit further include support plate, two casings and
The lower section of driving gear is arranged in two fixed links, the support plate, and the support plate is fixed on protective shell, described sleeve pipe with
Fixed link corresponds, and two casings are respectively sleeved at the both ends of transmission shaft, and described sleeve pipe is fixed on support plate by fixed link
On.
Preferably, the power unit further includes bearing and support rod, the bearing in order to provide support force to shaft
Inside be fixedly connected with shaft, the outside of the bearing is fixed on the top of support plate by support rod.
Preferably, one end of the separate driving bevel gear of the shaft is equipped with handle for the ease of rotating shaft.
The invention has the advantages that this has the LED illumination device of light regulatory function by regulating mechanism, it can be right
The light that LED lamp tube issues carries out angular adjustment, consequently facilitating irradiation position is adjusted as needed, with existing regulating mechanism phase
Than the regulating mechanism realizes the irradiating angle of LED lamp tube by adjusting the angle of reflector, and it is convenient to adjust, and improves LED illumination
The practicability of equipment.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of the LED illumination device with light regulatory function of the invention；
Fig. 2 is the structural schematic diagram of the regulating mechanism of the LED illumination device with light regulatory function of the invention；
Fig. 3 is the structural schematic diagram of the power unit of the LED illumination device with light regulatory function of the invention；
In figure: 1. protective shells, 2.LED fluorescent tube, 3. supporting plates, 4. reflectors, 5. shafts, 6. driving bevel gears, 7. from mantle
Gear, 8. transmission shafts, 9. driving gears, 10. rack gears, 11. sliding blocks, 12. adjusting rods, 13. guide rods, 14. bearings, 15. casings,
16. handle, 17. support plates, 18. support rods, 19. fixed links, 20. support shafts.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
As shown in Figure 1, a kind of LED illumination device with light regulatory function, including protective shell 1 and LED lamp tube 2, institute
The inside that protective shell 1 is arranged in LED lamp tube 2 is stated, the axis of the protective shell 1 is parallel with the axis of LED lamp tube 2, the protection
The inside of shell 1 is equipped with regulating mechanism, and the top of LED lamp tube 2 is arranged in the regulating mechanism；
The LED illumination device with light regulatory function is by regulating mechanism, the light that can be issued to LED lamp tube 2
It carries out angular adjustment and improves the practicability of LED illumination device consequently facilitating adjusting irradiation position as needed.
As Figure 2-3, the regulating mechanism includes supporting plate 3, support shaft 20, reflector 4 and adjusts component, the supporting plate
3 are arranged in the top of LED lamp tube 2, and the supporting plate 3 is fixed in protective shell 1, and the shape of the vertical cross-section of the reflector 4 is
Arc-shaped, the center of circle of the circular section of the reflector 4 is located at the lower section of reflector 4, and the top of the support shaft 20 is fixed
In the lower section of supporting plate 3, the side of the separate LED lamp tube 2 of the bottom end and reflector 4 of the support shaft 20 is hinged, the adjusting group
The lower section of supporting plate 3 is arranged in part, and the adjusting component and reflector 4 are sequentially connected；
The adjusting component includes power unit and mobile unit, and the top of power unit is arranged in the mobile unit,
The power unit and mobile unit are sequentially connected, and the mobile unit includes sliding block 11, rack gear 10 and adjusting rod 12, the cunning
The lower section of block 11 is fixedly connected with rack gear 10, and one end of the adjusting rod 12 and sliding block 11 are hinged, the adjusting rod 12 it is another
End is hinged with reflector 4, and the rack gear 10 is connect with power unit.
When carrying out light angle and adjusting work, shaft 5 in rotational power unit, so that power unit works, thus
So that mobile unit works, band carry-over bar 10 is mobile, thus it is mobile with movable slider 11, by adjusting rod 12, so that 4 turns of reflector
It is dynamic, to have adjusted the angle of reflector 4, to realize the irradiating angle for adjusting the light that LED lamp tube 2 issues, it is convenient for root
According to needing to adjust irradiation position, to realize the function of adjusting irradiation area.
Preferably, in order to limit the moving direction of sliding block 11, the mobile unit includes guide rod 13, the guide rod
13 vertical cross-section is U-shaped, and the both ends of the guide rod 13 are each attached to the lower section of supporting plate 3, and the sliding block 11 is set in guiding
On bar 13, the sliding block 11 is slidably connected with guide rod 13.Power unit work, band movable slider 11 is in 13 top shoe of guide rod
11, the moving direction of sliding block 11 is limited, the stability when movement of sliding block 11 is improved.
Preferably, in order to which band movable slider 11 is mobile, the power unit includes shaft 5, driving bevel gear 6, from mantle
Gear 7, transmission shaft 8 and driving gear 9, the axis of the shaft 5 is vertical with the axis of protective shell 1, the side of the protective shell 1
Equipped with through-hole, one end of the shaft 5 passes through the outside that protective shell 1 is arranged in through-hole, and the other end setting of the shaft 5 is being protected
The inside of protective case 1, the driving bevel gear 6 are fixed on the other end of shaft 5, the axis of the transmission shaft 8 and the axis of shaft 5
Vertically, the driven wheel of differential 7 and driving gear 9 are respectively sleeved on the both ends of transmission shaft 8, the driven wheel of differential 7 and drive
Dynamic bevel gear 6 engages, and the lower section of rack gear 10 is arranged in the rack gear 10, and the rack gear 10 is engaged with driving gear 9.
Rotating shaft 5 rotates transmission shaft 8 by driven wheel of differential 7, to drive so that driving bevel gear 6 is rotated
Gear 9 is driven to rotate, since driving gear 9 is engaged with rack gear 10, thus it is mobile with movable slider 11 by rack gear 10, pass through adjusting
Bar 12 rotates reflector 4, to have adjusted the angle of reflector 4, adjusts the light that LED lamp tube 2 issues to realize
Irradiating angle, convenient for as needed adjust irradiation position, thus realize adjust irradiation area function.
Preferably, the power unit further includes 17, two casings of support plate in order to provide support force to transmission shaft 8
15 and two fixed links 19, the lower section of driving gear 9 is arranged in the support plate 17, and the support plate 17 is fixed on protective shell 1
On, described sleeve pipe 15 and fixed link 19 correspond, and two casings 15 are respectively sleeved at the both ends of transmission shaft 8, described sleeve pipe 15
It is fixed in support plate 17 by fixed link 19.By casing 15, support force is provided to transmission shaft 8, transmission shaft 8 is avoided to tilt,
Influence power unit work.
Preferably, the power unit further includes bearing 14 and support rod 18, institute in order to provide support force to shaft 5
The inside for stating bearing 14 is fixedly connected with shaft 5, and the outside of the bearing 14 is fixed on the upper of support plate 17 by support rod 18
Side.By bearing 14, in the case where not influencing the rotation of shaft 5, support force is provided to shaft 5, is improved when shaft 5 rotates
Stability.
Preferably, one end of the separate driving bevel gear 6 of the shaft 5 is equipped with handle for the ease of rotating shaft 5
16。
When carrying out light and adjusting work, shaft in rotational power unit, so that power unit works, so that moving
Moving cell work, band carry-over bar 10 is mobile, thus it is mobile with movable slider 11, by adjusting rod 12, so that reflector 4 rotates, from
And the angle of reflector 4 is had adjusted, the light that LED lamp tube 2 issues is adjusted to realize, expands 2 light-illuminating of LED lamp tube
Range.
Compared with prior art, this has the LED illumination device of light regulatory function by regulating mechanism, can be to LED
The light that fluorescent tube 2 issues carries out angular adjustment, consequently facilitating irradiation position is adjusted as needed, with existing regulating mechanism phase
Than the regulating mechanism realizes the irradiating angle of LED lamp tube 2 by adjusting the angle of reflector 4, and it is convenient to adjust, and improves LED photograph
The practicability of bright equipment.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (6)
1. a kind of LED illumination device with light regulatory function, including protective shell (1) and LED lamp tube (2), the LED lamp tube
(2) it is arranged in the inside of protective shell (1), the axis of the protective shell (1) is parallel with the axis of LED lamp tube (2), and feature exists
In the inside of the protective shell (1) is equipped with regulating mechanism, top of the regulating mechanism setting in LED lamp tube (2)；
The regulating mechanism includes supporting plate (3), support shaft (20), reflector (4) and adjusts component, and supporting plate (3) setting exists
The top of LED lamp tube (2), the supporting plate (3) are fixed in protective shell (1), and the shape of the vertical cross-section of the reflector (4) is
Arc-shaped, the center of circle of the circular section of the reflector (4) is located at the lower section of reflector (4), the top of the support shaft (20)
End is fixed on the lower section of supporting plate (3), the side hinge of the separate LED lamp tube (2) of the bottom end and reflector (4) of the support shaft (20)
It connects, the adjusting component setting is sequentially connected in the lower section of supporting plate (3), the adjusting component and reflector (4)；
The adjusting component includes power unit and mobile unit, and the top of power unit is arranged in the mobile unit, described
Power unit and mobile unit are sequentially connected, and the mobile unit includes sliding block (11), rack gear (10) and adjusting rod (12), described
The lower section of sliding block (11) is fixedly connected with rack gear (10), one end of the adjusting rod (12) and sliding block (11) hingedly, the adjusting
Hingedly, the rack gear (10) connect with power unit for the other end of bar (12) and reflector (4).
2. as described in claim 1 with the LED illumination device of light regulatory function, which is characterized in that the mobile unit
It further include guide rod (13), the vertical cross-section of the guide rod (13) is U-shaped, and the both ends of the guide rod (13) are each attached to branch
The lower section of plate (3), the sliding block (11) are set on guide rod (13), and the sliding block (11) is slidably connected with guide rod (13).
3. as described in claim 1 with the LED illumination device of light regulatory function, which is characterized in that the power unit
Including shaft (5), driving bevel gear (6), driven wheel of differential (7), transmission shaft (8) and gear (9) are driven, the shaft (5)
Axis is vertical with the axis of protective shell (1), and the side of the protective shell (1) is equipped with through-hole, and one end of the shaft (5) passes through logical
Hole setting is in the outside of protective shell (1), and in the inside of protective shell (1), tooth is bored in the driving for the other end setting of the shaft (5)
Wheel (6) is fixed on the other end of shaft (5), and the axis of the transmission shaft (8) is vertical with the axis of shaft (5), described from mantle
Gear (7) and driving gear (9) are respectively sleeved on the both ends of transmission shaft (8), the driven wheel of differential (7) and driving bevel gear
(6) it engages, in the lower section of rack gear (10), the rack gear (10) is engaged with driving gear (9) for rack gear (10) setting.
4. as claimed in claim 3 with the LED illumination device of light regulatory function, which is characterized in that the power unit
It further include support plate (17), two casings (15) and two fixed links (19), support plate (17) setting is in driving gear (9)
Lower section, the support plate (17) is fixed on protective shell (1) (interior), and described sleeve pipe (15) and fixed link (19) correspond,
Two casings (15) are respectively sleeved at the both ends of transmission shaft (8), and described sleeve pipe (15) is fixed on support plate by fixed link (19)
(17) on.
5. as claimed in claim 4 with the LED illumination device of light regulatory function, which is characterized in that the power unit
It further include bearing (14) and support rod (18), the inside of the bearing (14) is fixedly connected with shaft (5), the bearing (14)
Outside is fixed on the top of support plate (17) by support rod (18).
6. as described in claim 1 with the LED illumination device of light regulatory function, which is characterized in that the shaft (5)
One end far from driving bevel gear (6) is equipped with handle (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910040074.0A CN109681796A (en) | 2019-01-16 | 2019-01-16 | A kind of LED illumination device with light regulatory function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910040074.0A CN109681796A (en) | 2019-01-16 | 2019-01-16 | A kind of LED illumination device with light regulatory function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109681796A true CN109681796A (en) | 2019-04-26 |
Family
ID=66193337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910040074.0A Pending CN109681796A (en) | 2019-01-16 | 2019-01-16 | A kind of LED illumination device with light regulatory function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109681796A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604129A (en) * | 2021-07-27 | 2021-11-05 | 苏州地枢新材料科技有限公司 | High-strength and convenient-to-maintain light-emitting floor tile |
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| CN106931350A (en) * | 2017-05-16 | 2017-07-07 | 宁波高瑞照明有限公司 | A kind of lighting apparatus of angle adjustable |
| CN108099760A (en) * | 2017-12-13 | 2018-06-01 | 芜湖润蓝生物科技有限公司 | A kind of headlight for vehicles convenient for adjusting angle |
| CN108317463A (en) * | 2018-01-02 | 2018-07-24 | 深圳市奈士迪技术研发有限公司 | A kind of outdoor illumination equipment being easily installed with cleaning function |
| CN207907027U (en) * | 2018-03-28 | 2018-09-25 | 兰州交通大学 | A kind of building shot-light convenient for handoff angle |
| CN207935814U (en) * | 2018-07-28 | 2018-10-02 | 钱幼华 | A kind of desk lamp convenient for adjusting brightness |
| CN207983279U (en) * | 2018-03-16 | 2018-10-19 | 哈尔滨繁创机械设备有限公司 | A kind of parts machining bracket |
| CN207999711U (en) * | 2018-03-14 | 2018-10-23 | 安庆师范大学 | A kind of LED lamp tube with angle regulating function for fishing boat |
| CN108916761A (en) * | 2018-04-21 | 2018-11-30 | 芜湖渤江智能科技有限公司 | A kind of railway illumination lamp of adjustable-angle |
-
2019
- 2019-01-16 CN CN201910040074.0A patent/CN109681796A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7052165B2 (en) * | 2004-02-09 | 2006-05-30 | Peter Field | Vehicle headlight assembly |
| CN106931350A (en) * | 2017-05-16 | 2017-07-07 | 宁波高瑞照明有限公司 | A kind of lighting apparatus of angle adjustable |
| CN108099760A (en) * | 2017-12-13 | 2018-06-01 | 芜湖润蓝生物科技有限公司 | A kind of headlight for vehicles convenient for adjusting angle |
| CN108317463A (en) * | 2018-01-02 | 2018-07-24 | 深圳市奈士迪技术研发有限公司 | A kind of outdoor illumination equipment being easily installed with cleaning function |
| CN207999711U (en) * | 2018-03-14 | 2018-10-23 | 安庆师范大学 | A kind of LED lamp tube with angle regulating function for fishing boat |
| CN207983279U (en) * | 2018-03-16 | 2018-10-19 | 哈尔滨繁创机械设备有限公司 | A kind of parts machining bracket |
| CN207907027U (en) * | 2018-03-28 | 2018-09-25 | 兰州交通大学 | A kind of building shot-light convenient for handoff angle |
| CN108916761A (en) * | 2018-04-21 | 2018-11-30 | 芜湖渤江智能科技有限公司 | A kind of railway illumination lamp of adjustable-angle |
| CN207935814U (en) * | 2018-07-28 | 2018-10-02 | 钱幼华 | A kind of desk lamp convenient for adjusting brightness |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604129A (en) * | 2021-07-27 | 2021-11-05 | 苏州地枢新材料科技有限公司 | High-strength and convenient-to-maintain light-emitting floor tile |
| CN113604129B (en) * | 2021-07-27 | 2022-08-26 | 苏州地枢新材料科技有限公司 | High-strength and convenient-to-maintain light-emitting floor tile |
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Application publication date: 20190426 |