CN109458585A - Tables and chairs illuminator is fixed in classroom - Google Patents
Tables and chairs illuminator is fixed in classroom Download PDFInfo
- Publication number
- CN109458585A CN109458585A CN201811429694.5A CN201811429694A CN109458585A CN 109458585 A CN109458585 A CN 109458585A CN 201811429694 A CN201811429694 A CN 201811429694A CN 109458585 A CN109458585 A CN 109458585A
- Authority
- CN
- China
- Prior art keywords
- classroom
- illuminator
- chairs
- substrate
- lamp holder
- 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
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
-
- 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
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
-
- 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
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
- F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
- F21V23/0471—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor detecting the proximity, the presence or the movement of an object or a person
-
- 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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
-
- 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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
-
- 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
- F21V7/00—Reflectors for light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/30—Lighting for domestic or personal use
- F21W2131/301—Lighting for domestic or personal use for furniture
-
- 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]
Abstract
The invention belongs to lighting technical fields, more particularly, to a kind of fixed tables and chairs illuminator in classroom, it is characterized by comprising lamp holder of the desk front-row seats by back is arranged in, lighting source on this lamp holder is set, lampshade on lamp holder is set, the control switch being connected with lighting source, lighting source includes the substrate being arranged on lamp holder, LED lamp bead on this substrate is set, positioned at substrate top and the heat sink that is connected with substrate, one group of heat gap on lampshade and being located above heat sink is set.The fixed tables and chairs illuminator in classroom of the invention, illumination is high, and low energy consumption, dazzle is weak, and lamps and lanterns are very high to the utilization rate of light, and the luminous flux almost all that light source issues projects on corresponding desk top, and do not have direct light and enter human eye, the academic environment of high-efficiency comfortable can be provided for numerous teachers and students.
Description
Technical field
The invention belongs to lighting technical fields, more particularly, to a kind of fixed tables and chairs illuminator in classroom.
Background technique
With the development of China's economy, science and technology, requirement of the people to life, working and learning environment is being continuously improved.For
Can be provided to people's lives, working and learning one it is comfortable, efficiently, the luminous environment of health, " the building lighting design in China
Standard " (GB 50034-2013) all done specific regulation to illumination quantity, quality and the energy consumption standard of all kinds of buildings.With regard to religion
It educates for building, standard provides that the desk top illumination in classroom and reading room is not less than 300lx, and unified glare value UGR is little
In 19, illuminating power density LPD is no more than 9w/m2.However according to the investigation to the different classes of classroom illumination situation of multiple universities
It is found that the lighting condition of university classroom and there is also larger gaps with existing lighting criteria for not fully up to expectations or even some indexs.
For example, current university classroom illuminator is essentially all straight tube fluorescent lamp, desk top illumination about 100lx, better reaches
200lx or so is arrived, LPD is but substantially all greater than 11w/m2 under such illumination conditions.In addition, looking at the blackboard when we come back
When, bright fluorescent tube has entered our visual field, dazzle is formed, even sustainable degree, also to student's
Vision Health constitutes adverse effect.
Summary of the invention
The object of the present invention is to provide one kind be able to solve current university classroom artificial light environment illumination it is not up to standard, illumination energy
Consume the fixed tables and chairs illuminator in classroom that exceeded, unified glare is worth the problems such as larger.
The purpose of the present invention is what is realized by following technical proposals:
The fixed tables and chairs illuminator in classroom of the invention, it is characterised in that the lamps and lanterns of back are leaned on including desk front-row seats are arranged in
Seat, is arranged in the lighting source on this lamp holder, the lampshade on the lamp holder is arranged in, be connected with the lighting source
Control switch,
The lighting source includes the substrate being arranged on the lamp holder, and the LED lamp bead on this substrate is arranged in, and is located at institute
One on the lampshade and be located above the heat sink is arranged in the heat sink stating substrate top and being connected with the substrate
Group heat gap.
The control switch includes manual switch and infrared controlled switch.
The infrared controlled switch includes infrared inductor.
By back and it is located at below the lighting source equipped with reflective member in the desk front-row seats.
Reflective arc plate is equipped on the inside of the lampshade.
Advantages of the present invention:
(1) the fixed tables and chairs illuminator in classroom of the invention, illumination is high, can although energy consumption only has two LED lamp beads of 1w
To issue the luminous flux of 100lm or more, and the luminous flux almost all that the light source issues projects on corresponding desk top, institute
It is very high with utilization rate of the lamps and lanterns to light, so that the requirement of 300lx or more as defined in standard is fully achieved in desk top illumination；
(2) the fixed tables and chairs illuminator in classroom of the invention, low energy consumption, in situation full and more than desktop illumination 300lx
Under, the lighting energy consumption of desktop is 180 watts, provides the ambient lighting in classroom with 6 15 watts of straight tube LED light, tabletop lighting adds ring
It is 270 watts that border illumination, which has energy consumption altogether, even if the blackboard along with 60 watts illuminates, the illuminating power density LPD in classroom is only
1.86w/m2, far below national lighting criteria value；Moreover, lamps and lanterns of the invention are, it can be achieved that how many people's how many lamp, avoids not
Necessary waste；
(3) the fixed tables and chairs illuminator in classroom of the invention, dazzle is weak, the light almost all issued using lamps and lanterns of the invention
It projects on desk top, does not have direct light and enter human eye, is i.e. human eye can't see bright light source, can provide height for numerous teachers and students
Imitate comfortable academic environment；
(4) the fixed tables and chairs illuminator in classroom of the invention, clean and environmental protection, compared with the common fluorescent lamp of current classroom illumination,
Without mercury vapour in LED light source, will not be polluted the environment because light source damages；In addition, the service life of LED light source is about
5 times of fluorescent lifetime, have not only saved light source and human cost, while greatly reducing the cost for handling waste and old light source, mesh
The preceding processing to old and useless fluorescent lamp has and is much not returned to light source treatment plant and is handled and be treated as common rubbish and throw away,
To pollute the environment, even if LED light source is treated as common rubbish and throws away, the influence to environment is also smaller than fluorescent lamp to be obtained
It is more.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the side view of Fig. 1 of the present invention.
Fig. 3 is the A-A view of Fig. 1 of the present invention.
Fig. 4 is the portion the B enlarged view of Fig. 3 of the present invention.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing.
As shown in Figs 1-4, the fixed tables and chairs illuminator in classroom of the invention, it is characterised in that including setting at desk front row
The lighting source on this lamp holder is arranged in lamp holder on backrest 2, and the lampshade 4 on the lamp holder is arranged in, with institute
The control switch 5 that lighting source is connected is stated,
The lighting source includes the substrate 9 being arranged on the lamp holder, and the LED lamp bead on this substrate 9 is arranged in, is located at
9 top of substrate and the heat sink 8 being connected with the substrate 9 are arranged on the lampshade 4 and are located at the heat sink 8
One group of heat gap 7 of top.
The control switch 5 includes manual switch and infrared controlled switch.
The infrared controlled switch includes infrared inductor.
On the desk front-row seats backrest 2 and it is located at below the lighting source equipped with reflective member 10.
Reflective arc plate is equipped on the inside of the lampshade 4.The selection of reflective arc plate benging radian and setting angle, makes it
The light that light source issues can be projected desktop to the greatest extent, to improve the utilization rate of the light of light source sending, while being avoided straight
It penetrates light and enters human eye, i.e., the light source will not be to artificial at dazzle.
As shown in Figure 1, the fixed tables and chairs illuminator 1 in main body classroom of the invention is mounted in the fixed desk front row seat in classroom
Behind chair back 2, illumination abundance and uniform luminous environment are provided for desk top 3 thereafter.It is of the invention as can see from Figure 2
The control switch 5 of lamps and lanterns, including manual switch and infrared controlled switch, manual switch can realize two grades of controls: half-open and standard-sized sheet.
With the decline of outdoor natural light illumination, when outdoor luminance reduction is to B.C.D., or the desk at the cloudy day, near interior wall
3 luminance reduction of face supplements illumination to needing to open artificial light, at this moment only half-open lamps and lanterns of the invention may be needed just to be enough to reach
To required lighting standard, this lamps and lanterns of standard-sized sheet are just needed to night, can avoid the waste of lighting energy in this way.If someone from
Seat is opened, can be with Turn Off Lights When Leaving, even if having forgotten to turn off the light, infrared inductor also will test the desk, and temporarily unmanned use, delay are certain
After time, it will turn off the lamps and lanterns.
As shown in figure 3, requirement of this lamps and lanterns according to its installation site and desk top 3 to uniformity of illuminance, accurate to control
The shape for making its reflective surface, the light for issuing light source uniformly irradiate from lamps and lanterns opening, i.e., the present invention, which has, suitably matches
Light curve, when installation, selecting the mounting heights of lamps and lanterns according to desktop width, (mounting height of general fixed tables and chairs about exists
150mm), while requiring lamps and lanterns light-emitting window parallel with desktop, 6 almost all of light that light source can in this way issued and uniform
It is irradiated on desk top 3.
For the construction of lamps and lanterns itself as shown in figure 4, LED luminescence unit is mounted on substrate 9, substrate 9 is mounted on heat sink 8
On, heat sink is mounted on the top of lamps and lanterns, opened one group of heat gap 7 at the top of lamps and lanterns, in order to the heat that issues light source and
When distribute, be conducive to keep light source luminous efficiency and service life.The light direct irradiation or pass through that light source issues
Reflective member 10 is reflected into desktop.
Above-described embodiment in use, tool there are two types of use state:
The first use state supplements insufficient illumination, and when cloudy day or solar elevation are lower, indoor desktop illumination is especially leaned on
The desktop illumination of nearly interior wall is lower, at this moment, can half-open lamps and lanterns of the invention to supplement the insufficient illumination of desktop, the back in entire classroom
Scape luminous environment is still provided by natural light.
Second of use state, classroom night in use, lamps and lanterns of the invention in the position standard-sized sheet taken, mention for desktop
For required illumination, forget to turn off the light when leaving seat if there is classmate, then infrared induction switch can detect the position nobody
It uses, setting time is arrived in delay after detecting unmanned use, and still nobody is in use, the position is automatically closed in infrared induction switch
The lamps and lanterns set, in favor of energy conservation.In addition, needing to reduce the brightness pair between desktop and background environment to mitigate glare effects
Than, use several long tube LED light to illuminate ceiling in a manner of indirect lighting thus to provide background ambient illumination, while becoming clear
Fluorescent tube will not enter the visual field of classmates, can provide the luminous environment of a high-efficiency comfortable for classroom in this way.
The fixed tables and chairs illuminator in classroom of the invention, illumination is high, although energy consumption only has two LED lamp beads of 1w,
The luminous flux of 100lm or more can be issued, and the luminous flux almost all that the light source issues projects corresponding desk top 3
On, so the lamps and lanterns are very high to the utilization rate of light, so that 3 illumination of desk top is fully achieved 300lx's or more as defined in standard
It is required that；The fixed tables and chairs illuminator in classroom of the invention, low energy consumption, full and in the case where more than desktop illumination 300lx,
The lighting energy consumption of desktop is 180 watts, provides the ambient lighting in classroom with 6 15 watts of straight tube LED light, tabletop lighting adds environment to shine
Bright energy consumption altogether is 270 watts, even if the blackboard along with 60 watts illuminates, the illuminating power density LPD in classroom is only 1.86w/m2,
Far below national lighting criteria value；Moreover, lamps and lanterns of the invention are, it can be achieved that how many people's how many lamp, avoids unnecessary wave
Take；The fixed tables and chairs illuminator in classroom of the invention, dazzle is weak, is projected using the light almost all that lamps and lanterns of the invention are issued
Onto desk top 3, direct light is not had and enters human eye, i.e. human eye can't see bright light source, and the ambient lighting in classroom can be with
Light source is made using the straight tube LED of high photosynthetic efficiency, using indirect lighting mode, human eye also can't see bright light source, and the purpose is to shine
Bright classroom ceiling, provides background lighting for, and the illumination reduced between desk top 3 and background environment is poor, therefore, uses lamp of the invention
Has the space of illumination, dazzle value is smaller, can provide the academic environment of high-efficiency comfortable for numerous teachers and students；Classroom table dormant of the invention
Chair illuminator, clean and environmental protection, compared with the common fluorescent lamp of current classroom illumination, without mercury vapour, Bu Huiyin in LED light source
It is polluted the environment for light source damage；In addition, the service life of LED light source is about 5 times of fluorescent lifetime, not only save
Light source and human cost, while the cost for handling waste and old light source is greatly reduced, at present to the processing of old and useless fluorescent lamp, have many
It is not returned to light source treatment plant to be handled and be treated as common rubbish and throw away, to pollute the environment, LED light source is
Make to be treated as common rubbish to throw away, the influence to environment is also more much smaller than fluorescent lamp.
Claims (5)
1. a kind of fixed tables and chairs illuminator in classroom, it is characterised in that lean on the lamps and lanterns of back including desk front-row seats are arranged in
Seat, is arranged in the lighting source on this lamp holder, the lampshade on the lamp holder is arranged in, be connected with the lighting source
Control switch,
The lighting source includes the substrate being arranged on the lamp holder, and the LED lamp bead on this substrate is arranged in, and is located at institute
One on the lampshade and be located above the heat sink is arranged in the heat sink stating substrate top and being connected with the substrate
Group heat gap.
2. the fixed tables and chairs illuminator in classroom according to claim 1, it is characterised in that the control switch includes hand
Control switch and infrared controlled switch.
3. the fixed tables and chairs illuminator in classroom according to claim 2, it is characterised in that the infrared controlled switch packet
Include infrared inductor.
4. the fixed tables and chairs illuminator in classroom according to claim 1, it is characterised in that in the desk front-row seats
By back and it is located at below the lighting source equipped with reflective member.
5. the fixed tables and chairs illuminator in classroom according to claim 1, it is characterised in that be equipped on the inside of the lampshade
Reflective arc plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811429694.5A CN109458585A (en) | 2018-11-28 | 2018-11-28 | Tables and chairs illuminator is fixed in classroom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811429694.5A CN109458585A (en) | 2018-11-28 | 2018-11-28 | Tables and chairs illuminator is fixed in classroom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109458585A true CN109458585A (en) | 2019-03-12 |
Family
ID=65611731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811429694.5A Pending CN109458585A (en) | 2018-11-28 | 2018-11-28 | Tables and chairs illuminator is fixed in classroom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109458585A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154294A (en) * | 2021-04-28 | 2021-07-23 | 华北水利水电大学 | Desktop illuminating lamp, illuminating system and method for ladder classroom |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH072131U (en) * | 1991-07-29 | 1995-01-13 | 信子 宗方 | Signpost for moving the seat back |
| US20080136230A1 (en) * | 2004-10-14 | 2008-06-12 | Singapore Airlines Limited | Aircraft Passenger Seat With A Display Monitor Including A Reading Light |
| CN203387737U (en) * | 2013-07-26 | 2014-01-08 | 彩虹集团公司 | Machine room energy saving lighting device |
| CN203979999U (en) * | 2014-05-22 | 2014-12-03 | 东莞快灵通卡西尼电子科技有限公司 | A kind of mini light night of distributed lighting |
| CN104348201A (en) * | 2013-08-02 | 2015-02-11 | 陈煌勋 | Charger with projection lighting function |
| KR20160094601A (en) * | 2015-02-01 | 2016-08-10 | 이영인 | Train Seat with Light |
| CN208901237U (en) * | 2018-11-28 | 2019-05-24 | 辽宁科技大学 | Tables and chairs illuminator is fixed in classroom |
-
2018
- 2018-11-28 CN CN201811429694.5A patent/CN109458585A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH072131U (en) * | 1991-07-29 | 1995-01-13 | 信子 宗方 | Signpost for moving the seat back |
| US20080136230A1 (en) * | 2004-10-14 | 2008-06-12 | Singapore Airlines Limited | Aircraft Passenger Seat With A Display Monitor Including A Reading Light |
| CN203387737U (en) * | 2013-07-26 | 2014-01-08 | 彩虹集团公司 | Machine room energy saving lighting device |
| CN104348201A (en) * | 2013-08-02 | 2015-02-11 | 陈煌勋 | Charger with projection lighting function |
| CN203979999U (en) * | 2014-05-22 | 2014-12-03 | 东莞快灵通卡西尼电子科技有限公司 | A kind of mini light night of distributed lighting |
| KR20160094601A (en) * | 2015-02-01 | 2016-08-10 | 이영인 | Train Seat with Light |
| CN208901237U (en) * | 2018-11-28 | 2019-05-24 | 辽宁科技大学 | Tables and chairs illuminator is fixed in classroom |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154294A (en) * | 2021-04-28 | 2021-07-23 | 华北水利水电大学 | Desktop illuminating lamp, illuminating system and method for ladder classroom |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8479461B2 (en) | Lighting system combining natural and artificial light | |
| CN203744011U (en) | LED blackboard lamp achieving uniform illumination | |
| CN103727466A (en) | LED blackboard lamp capable of achieving uniform lighting | |
| CN104948981A (en) | Light-gathering table lamp | |
| CN208901237U (en) | Tables and chairs illuminator is fixed in classroom | |
| CN109458585A (en) | Tables and chairs illuminator is fixed in classroom | |
| CN209587799U (en) | A kind of anti-dazzle blackboard lights that can freely replace reflector | |
| CN206786496U (en) | A kind of Down lamp with emergency function | |
| CN205579358U (en) | Modular no shadow corner lamp | |
| CN204176408U (en) | Spotlight | |
| CN201462605U (en) | Ceiling lamp with LEDs | |
| CN205824735U (en) | A kind of adjustable ceramic lamp of brightness | |
| CN202532318U (en) | Special multi-curve asymmetric light-distribution single tube lamp for lighting of blackboard in classroom | |
| CN206257554U (en) | A kind of double-colored temperature LED lamp for supporting multi-angle irradiation | |
| CN104747971A (en) | Automatic intelligent induction dimming lamp | |
| CN206708749U (en) | A kind of energy saving and environment friendly LED with high brightness | |
| CN205579201U (en) | LED illumination lamps and lanterns of lightproof loss | |
| CN204187329U (en) | A kind of LED illumination lamp | |
| CN219063224U (en) | Lamp grille and lamp | |
| CN107013830A (en) | Desk lamp and illuminator | |
| CN206754986U (en) | A kind of cake type ceiling lamp | |
| CN205208308U (en) | Blackboard lamp of intelligence | |
| CN215892154U (en) | Non-glare classroom lighting up lamp | |
| CN209587756U (en) | A kind of floor lamp for key lighting | |
| CN213146314U (en) | Blackboard lamp |
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 |