CN207880659U - A kind of LED energy-conserving road lamps - Google Patents
A kind of LED energy-conserving road lamps Download PDFInfo
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- CN207880659U CN207880659U CN201820317444.1U CN201820317444U CN207880659U CN 207880659 U CN207880659 U CN 207880659U CN 201820317444 U CN201820317444 U CN 201820317444U CN 207880659 U CN207880659 U CN 207880659U
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- lamp stand
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- wall
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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Abstract
The utility model discloses a kind of LED energy-conserving road lamps that can improve wind power generation efficiency.The LED energy-conserving road lamps, including lamp stand, arm, lamp cap, the lower end of lamp stand is provided with fixed seat, side close to lamp stand upper end is fixed with solar panel by supporting rod, lamp stand is internally provided with inverter, energy supply control module, accumulator and the power cord being electrically connected with city, the upper end of lamp stand is provided with wind power generation plant, pass through the improvement to wind power generation plant wind wheel, the design of taper wind wheel solves the problems, such as conventional wind wheel windage, windage is further eliminated using front fine and rear thick blade, effectively air-flow can be guided into side, eliminate the resistance of wind, greatly utilize wind energy, improve wind power generation efficiency；And it is simple in structure, of low cost, easily operated, blade is all designed using camber line, air-flow can slowly be guided to rear into, and under the action of bending, air-flow is disperseed away, carries out operation.It is suitble to promote and apply in street lamp field.
Description
Technical field
The utility model is related to street lamp fields, and in particular to a kind of LED energy-conserving road lamps.
Background technology
Street lamp shows the lamps and lanterns that road provides illumination functions, refers to lamps and lanterns in the middle road lighting range of traffic lighting.Road
Lamp is widely used in the various places for needing to illuminate.Existing LED energy-conserving road lamps include lamp stand, arm, lamp cap, the arm
One end be fixed on lamp stand, lamp cap is fixed on the other end of arm, and the lower end of lamp stand is provided with fixed seat, close to lamp stand upper end
Side solar panel is fixed with by supporting rod, lamp stand is internally provided with inverter, energy supply control module, accumulator
And the power cord being electrically connected with city, the input terminal of the inverter are connected with solar panel, the output of the inverter
End is connected with the input terminal of energy supply control module, and the power cord is connected with the input terminal of energy supply control module, the power supply control
The output end of molding block and accumulator charging connection, the output end of the accumulator are connected with lamp cap, the accumulator and lamp cap
Between be provided with control switch, the upper end of lamp stand is provided with wind power generation plant, and the wind power generation plant includes wind wheel, power generation
Machine, revolving body, the revolving body are fixed on the upper end of lamp stand by bearing, and bracket is fixedly connected on the revolving body, described
Generator is fixed on bracket, and the shaft of the wind wheel is fixedly connected with alternator shaft, and tail vane, institute are provided on the bracket
The output end for stating generator is connected with the output end of inverter by electric wire, and existing LED energy-conserving road lamps are deposited in use
In problems with：First, the wind wheel of the wind power generation plant of existing LED energy-conserving road lamps is all the form using fan blade,
The wind wheel windage of this structure is larger so that wind energy utilization is relatively low, leads to the less efficient of wind-power electricity generation.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of energy saving roads the LED that can improve wind power generation efficiency
Lamp.
Technical solution is used by the utility model solves above-mentioned technical problem：The LED energy-conserving road lamps, including lamp stand,
One end of arm, lamp cap, the arm is fixed on lamp stand, and lamp cap is fixed on the other end of arm, and the lower end of lamp stand is provided with
Fixed seat, the side close to lamp stand upper end are fixed with solar panel by supporting rod, lamp stand be internally provided with inverter,
Energy supply control module, accumulator and the power cord being electrically connected with city, input terminal and the solar panel phase of the inverter
Even, the output end of the inverter is connected with the input terminal of energy supply control module, the power cord and energy supply control module it is defeated
Enter end to be connected, output end and the accumulator charging connection of the energy supply control module, output end and the lamp cap phase of the accumulator
Even, control switch is provided between the accumulator and lamp cap, the upper end of lamp stand is provided with wind power generation plant, the wind-force hair
Electric installation includes wind wheel, generator, revolving body, and the revolving body is fixed on the upper end of lamp stand by bearing, on the revolving body
It is fixedly connected with bracket, the generator is fixed on bracket, and the shaft of the wind wheel is fixedly connected with alternator shaft, described
Tail vane is provided on bracket, the output end of the generator is connected with the output end of inverter by electric wire, and the wind wheel includes
Conical shell, rotation axis and 4~8 circumferentially disposed blades along conical shell, the rotation axis is along the center of conical shell
Axis is arranged, and rotation axis is fixedly connected with alternator shaft, and blade includes front, middle part and rear portion, and front is close to conical shell
The central shaft of body simultaneously has there are one vertex, central shaft of the rear part far from conical shell, and blade gradually broadens from front to rear portion,
The speedup of width from middle part to rear portion is more than from front to the speedup of middle part width, the side of blade and the appearance of conical shell
Face is connected, and the vertex of bucket front is overlapped with the vertex of a cone of conical shell, the angle of the front of blade and the central shaft of conical shell
It it is 27~35 °, the angle of the central shaft of bucket rear and conical shell is 42~60 °, and the profile of the blade includes connected
First long side and the second long side, the first long side and the second long side all extend to lower part from the vertex on top, and the first long side is gradually remote
The outer wall of shrinking away from theshell body, the second long side are connected with the outer wall of conical shell, and short side is connected between the first long side and the second long side.
Further, first long side and the second long side are camber line, the radian of the first long side is 0.7~1.2rad；
The radian of second long side is 0.7~0.95rad；The short side is camber line.
Further, being provided with the fixing device for fixation of advertisement flag on the lamp stand, the fixing device includes
The first guide roller, the second guide roller, privates wheel, privates wheel, draught line on lamp stand, first movement device, second
Mobile device, first guide roller, the second guide roller are fixed on the side wall of lamp stand upper end, and the first guide roller is fixed
On the outer wall of lamp stand, the second guide roller is fixed on the inner wall of lamp stand, and the privates wheel, privates wheel are fixed on and lean on
On the side wall of low beam bar lower end, and privates wheel is fixed on the outer wall of lamp stand, and privates wheel is fixed on the inner wall of lamp stand
On, the privates wheel is fixed on the underface of the first guide roller, and privates wheel is located at the underface of the second guide roller, the
One guide roller and the second guide roller are in sustained height, and privates wheel and privates wheel are located at sustained height, the traction
One end of line is fixed on first movement device, and the other end of draught line bypasses the first guide roller, the second guide roller, the 4th successively
It is fixed in the second mobile device after guide roller, privates wheel, the first movement device, the second mobile device are along lamp stand
Lower movement, and first movement device is located above the second mobile device, is arranged between first movement device and the second mobile device
Having and is linked together by drawstring, the first movement device includes the first annulus, and first annulus is sleeved on lamp stand, the
There are four the first idler wheels, four the first idler wheels to fix the first annulus by the first connector respectively for setting on the inner wall of one annulus
On inner wall, four the first idler wheels are uniformly arranged along the first annulus, and four the first idler wheels can only roll up and down along lamp stand, institute
The first fixed seat being provided on the outer wall of the first annulus for fixation of advertisement flag is stated, second mobile device includes the second circle
Ring, second annulus are sleeved on lamp stand, and there are four the second idler wheel, four the second idler wheels point for setting on the inner wall of the second annulus
It is not fixed by the second connector on the inner wall of the second annulus, four the second idler wheels are uniformly arranged along the second annulus, and four
Second wheel can only roll up and down along lamp stand, is provided on the outer wall of second annulus solid for the second of fixation of advertisement flag
Rotating handle is arranged on the third idler wheel in reservation.
Further, being provided with winder on the drawstring.
Further, the energy supply control module, which is STM32L151, controls chip.
The beneficial effects of the utility model：The LED energy-conserving road lamps pass through the improvement to wind power generation plant wind wheel, taper wind
The design of wheel solves the problems, such as conventional wind wheel windage, and windage is further eliminated using front fine and rear thick blade, can effectively by
Air-flow guides side into, eliminates the resistance of wind, greatly utilizes wind energy, improves wind power generation efficiency；And it is simple in structure, it is at low cost
Honest and clean, easily operated, blade is all designed using camber line, air-flow can slowly be guided to rear into, and under the action of bending, by gas
Flow point sheds, and carries out operation, and camber line short side can further eliminate windage.
Description of the drawings
Fig. 1 is the structural schematic diagram of LED energy-conserving road lamps described in the utility model；
Fig. 2 is the sectional view along A-A of Fig. 1；
Fig. 3 is the B-B direction sectional view of Fig. 1；
Description of symbols in figure：Lamp stand 1, arm 2, lamp cap 3, fixed seat 4, solar panel 5, inverter 6, power supply control
Module 7, accumulator 8, power cord 9, control switch 10, wind power generation plant 11, wind wheel 1101, conical shell 11011, rotation axis
11012, blade 11013, the first long side 110131, the second long side 110132, short side 110133, generator 1102, revolving body
1103, bracket 1104, tail vane 1105, fixing device 12, the first guide roller 1201, the second guide roller 1202, privates wheel
1203, privates wheel 1204, draught line 1205, first movement device 1206, the first annulus 12061, the first idler wheel 12062,
First connector 12063, the first fixed seat 12064, the second mobile device 1207, the second annulus 12071, the second idler wheel 12072,
Second connector 12073, the second fixed seat 12074, drawstring 1208, winder 1209, rotating handle 1210.
Specific implementation mode
Specific embodiment of the present utility model is further described below in conjunction with the accompanying drawings.
As shown in Figures 1 to 3, the LED energy-conserving road lamps, including lamp stand 1, arm 2, lamp cap 3, one end of the arm 2 are fixed
On lamp stand 1, lamp cap 3 is fixed on the other end of arm 2, and the lower end of lamp stand 1 is provided with fixed seat 4, and one close to 1 upper end of lamp stand
Side is fixed with solar panel 5 by supporting rod, and lamp stand 1 is internally provided with inverter 6, energy supply control module 7, accumulator
8 and the power cord 9 that is electrically connected with city, the input terminal of the inverter 6 be connected with solar panel 5, the inverter 6
Output end is connected with the input terminal of energy supply control module 7, and the power cord 9 is connected with the input terminal of energy supply control module 7, described
The output end of energy supply control module 7 and 8 charging connection of accumulator, the output end of the accumulator 8 are connected with lamp cap 3, the storage
Control switch 10 is provided between battery 8 and lamp cap 3, the upper end of lamp stand 1 is provided with wind power generation plant 11, the wind-power electricity generation
Device 11 includes wind wheel 1101, generator 1102, revolving body 1103, and the revolving body 1103 is fixed on lamp stand 1 by bearing
Upper end is fixedly connected with bracket 1104 on the revolving body 1103, and the generator 1102 is fixed on bracket 1104, the wind
The shaft of wheel 1101 is fixedly connected with 1102 shaft of generator, and tail vane 1105, the generator are provided on the bracket 1104
1102 output end is connected with the output end of inverter 6 by electric wire, and the wind wheel 1101 includes conical shell 11011, rotation
Axis 11012 and 4~8 circumferentially disposed blades 11013 along conical shell 11011, the rotation axis 11012 is along conical shell
11011 central shaft setting, and rotation axis 11012 is fixedly connected with 1102 shaft of generator, blade 11013 including front, in
Portion and rear portion, close to the central shaft and tool of conical shell 11011, there are one vertex for front, and the rear part is far from conical shell
11011 central shaft, blade 11013 gradually broaden from front to rear portion, and the speedup of the width from middle part to rear portion is more than in the past
To the speedup of middle part width, the side of blade 11013 is connected with the outer surface of conical shell 11011 in portion, 11013 front of blade
Vertex is overlapped with the vertex of a cone of conical shell 11011, and the front of blade 11013 and the angle of the central shaft of conical shell 11011 are
27~35 °, 11013 rear portion of blade and the angle of the central shaft of conical shell 11011 are 42~60 °, the wheel of the blade 11013
Exterior feature includes connected the first long side 110131 and the second long side 110132, the first long side 110131 and the second long side 110132 all from
The vertex on top extends to lower part, and the first long side 110131 is gradually distance from the outer wall of shell, the second long side 110132 and conical shell
The outer wall of body 11011 is connected, and short side 110133 is connected between the first long side 110131 and the second long side 110132.By to wind
The design of the improvement of 11 wind wheel 1101 of power generation device, taper wind wheel 1101 solves the problems, such as 1101 windage of conventional wind wheel, adopts
Windage is further eliminated with front fine and rear thick blade 11013, effectively air-flow can be guided into side, eliminate the resistance of wind, greatly
Ground utilizes wind energy, improves wind power generation efficiency；And simple in structure, of low cost, easily operated, first long side 110131
It is camber line with the second long side 110132, the radian of the first long side 110131 is 0.7~1.2rad；The radian of second long side 110132
For 0.7~0.95rad；The short side 110133 is camber line, and blade 11013 is all designed using camber line, can be by air-flow slowly
It guides rear into, and under the action of bending, air-flow is disperseed away, carry out operation, camber line short side 110133 can be into one
Step eliminates windage.
In addition, being provided with the fixing device 12 for fixation of advertisement flag on the lamp stand 1, the fixing device 12 includes lamp
The first guide roller 1201, the second guide roller 1202, privates wheel 1203, privates wheel 1204, draught line on bar 1
1205, first movement device 1206, the second mobile device 1207, first guide roller 1201, the second guide roller 1202 are fixed
On the side wall close to 1 upper end of lamp stand, and the first guide roller 1201 is fixed on the outer wall of lamp stand 1, and the second guide roller 1202 is solid
It is scheduled on the inner wall of lamp stand 1, the privates wheel 1203, privates wheel 1204 are fixed on the side wall close to 1 lower end of lamp stand
On, and privates wheel 1203 is fixed on the outer wall of lamp stand 1, privates wheel 1204 is fixed on the inner wall of lamp stand 1, described
Privates wheel 1203 is fixed on the underface of the first guide roller 1201, and privates wheel 1204 is located at the second guide roller 1202
Underface, the first guide roller 1201 and the second guide roller 1202 are in sustained height, privates wheel 1203 and privates wheel
1204 are located at sustained height, and one end of the draught line 1205 is fixed on first movement device 1206, draught line 1205 it is another
One end is fixed after bypassing the first guide roller 1201, the second guide roller 1202, privates wheel 1204, privates wheel 1203 successively
In the second mobile device 1207, the first movement device 1206, the second mobile device 1207 are moved up and down along lamp stand 1, and
First movement device 1206 is located at the top of the second mobile device 1207, first movement device 1206 and the second mobile device 1207 it
Between be provided with drawstring 1208 and link together, the first movement device 1206 includes the first annulus 12061, described first
Annulus 12061 is sleeved on lamp stand 1, the first idler wheel 12062 there are four settings on the inner wall of the first annulus 12061, four first
Idler wheel 12062 is fixed on the inner wall of the first annulus 12061 respectively by the first connector 12063, four 12062 edges of the first idler wheel
First annulus 12061 is uniformly arranged, and four the first idler wheels 12062 can only be rolled along about 1 lamp stand, first annulus
It is provided with the first fixed seat 12064 for fixation of advertisement flag on 12061 outer wall, second mobile device 1207 includes the
Two annulus 12071, second annulus 12071 are sleeved on lamp stand 1, and there are four for setting on the inner wall of the second annulus 12071
Second wheel 12072, four the second idler wheels 12072 fix the inner wall of the second annulus 12071 by the second connector 12073 respectively
On, four the second idler wheels 12072 are uniformly arranged along the second annulus 12071, and four the second idler wheels 12072 can be along lamp stand 1
It is lower only to roll, the second fixed seat 12074 for fixation of advertisement flag, institute are provided on the outer wall of second annulus 12071
State setting rotating handle 1210 on third idler wheel.By being provided with the fixing device 12 for fixation of advertisement flag on lamp stand 1, when
It needs in fixation of advertisement flag on lamp stand 1, it only need to be by rotating rotating handle 1210 so that first movement device 1206 and second
Mobile device 1207 is displaced downwardly to lower position, and the side of advertisement flag is passed through the first fixed seat 12064 and by operating personnel respectively
Two fixed seats 12074 are fixed, and the length for adjusting drawstring 1208 makes advertisement flag tighten up and down, then negative direction rotation rotation again
Handle 1210 will move to proper height on first movement device 1206 and the second mobile device 1207, installation is very convenient,
It is quick and easy for installation without setting up ladder.Further, the length for adjusting drawstring 1208 for convenience, on the drawstring 1208
It is provided with winder 1209.
In addition, convenient for the charging of control accumulator 8, the energy supply control module 7 is preferably that STM32L151 controls chip.
Claims (5)
1. a kind of LED energy-conserving road lamps, including lamp stand (1), arm (2), lamp cap (3), one end of the arm (2) are fixed on lamp stand
(1) on, lamp cap (3) is fixed on the other end of arm (2), and the lower end of lamp stand (1) is provided with fixed seat (4), on lamp stand (1)
The side at end is fixed with solar panel (5) by supporting rod, and lamp stand (1) is internally provided with inverter (6), power supply control
Module (7), accumulator (8) and the power cord (9) being electrically connected with city, the input terminal and solar cell of the inverter (6)
Plate (5) be connected, the output end of the inverter (6) is connected with the input terminal of energy supply control module (7), the power cord (9) and
The input terminal of energy supply control module (7) is connected, output end and accumulator (8) charging connection of the energy supply control module (7), institute
The output end for stating accumulator (8) is connected with lamp cap (3), and control switch is provided between the accumulator (8) and lamp cap (3)
(10), the upper end of lamp stand (1) is provided with wind power generation plant (11), the wind power generation plant (11) include wind wheel (1101),
Generator (1102), revolving body (1103), the revolving body (1103) are fixed on the upper end of lamp stand (1) by bearing, described time
It is fixedly connected with bracket (1104) on swivel (1103), the generator (1102) is fixed on bracket (1104), the wind wheel
(1101) shaft is fixedly connected with generator (1102) shaft, and tail vane (1105) is provided on the bracket (1104), described
The output end of generator (1102) is connected with the output end of inverter (6) by electric wire, it is characterised in that：The wind wheel (1101)
Including conical shell (11011), rotation axis (11012) and along 4~8 circumferentially disposed blades of conical shell (11011)
(11013), the rotation axis (11012) is arranged along the central shaft of conical shell (11011), and rotation axis (11012) and power generation
Machine (1102) shaft is fixedly connected, and blade (11013) includes front, middle part and rear portion, and front is close to conical shell (11011)
Central shaft and have there are one vertex, central shaft of the rear part far from conical shell (11011), blade (11013) from front to
Rear portion gradually broadens, and the speedup of the width from middle part to rear portion is more than from front to the speedup of middle part width, blade (11013)
Side is connected with the outer surface of conical shell (11011), the cone on the vertex and conical shell (11011) of blade (11013) front
Top overlaps, and the front of blade (11013) and the angle of the central shaft of conical shell (11011) are 27~35 °, blade (11013)
Rear portion and the angle of the central shaft of conical shell (11011) are 42~60 °, and the profile of the blade (11013) includes connected
First long side (110131) and the second long side (110132), the first long side (110131) and the second long side (110132) are all from top
Vertex extend to lower part, the first long side (110131) is gradually distance from the outer wall of shell, the second long side (110132) and conical shell
The outer wall of body (11011) is connected, and short side (110133) is connected between the first long side (110131) and the second long side (110132).
2. LED energy-conserving road lamps as described in claim 1, it is characterised in that：First long side (110131) and the second long side
(110132) it is camber line, the radian of the first long side (110131) is 0.7~1.2rad；The radian of second long side (110132) is
0.7~0.95rad；The short side (110133) is camber line.
3. LED energy-conserving road lamps as described in claim 1, it is characterised in that：It is provided with for fixation of advertisement on the lamp stand (1)
The fixing device (12) of flag, the fixing device (12) include the first guide roller (1201), the second guide roller on lamp stand (1)
(1202), privates wheel (1203), privates wheel (1204), draught line (1205), first movement device (1206), second
Mobile device (1207), first guide roller (1201), the second guide roller (1202) are fixed on close to the side of lamp stand (1) upper end
On wall, and the first guide roller (1201) is fixed on the outer wall of lamp stand (1), and the second guide roller (1202) is fixed on lamp stand (1)
On inner wall, the privates wheel (1203), privates wheel (1204) are fixed on the side wall of lamp stand (1) lower end, and
Privates wheel (1203) is fixed on the outer wall of lamp stand (1), and privates wheel (1204) is fixed on the inner wall of lamp stand (1),
The privates wheel (1203) is fixed on the underface of the first guide roller (1201), and privates wheel (1204) is led positioned at second
The underface of line wheel (1202), the first guide roller (1201) are in sustained height, privates wheel with the second guide roller (1202)
(1203) and privates wheel (1204) is located at sustained height, and one end of the draught line (1205) is fixed on first movement device
(1206) on, the other end of draught line (1205) is led around the first guide roller (1201), the second guide roller (1202), the 4th successively
It is fixed in the second mobile device (1207) after line wheel (1204), privates wheel (1203), the first movement device
(1206), the second mobile device (1207) is moved up and down along lamp stand (1), and first movement device (1206) is located at the second movement and fills
It sets above (1207), drawstring (1208) is provided between first movement device (1206) and the second mobile device (1207) even
It is connected together, the first movement device (1206) includes the first annulus (12061), and first annulus (12061) is sleeved on
On lamp stand (1), there are four the first idler wheel (12062), four the first idler wheels for setting on the inner wall of the first annulus (12061)
(12062) it is fixed on the inner wall of the first annulus (12061) by the first connector (12063) respectively, four the first idler wheels
(12062) it is uniformly arranged along the first annulus (12061), and four the first idler wheels (12062) can only be rolled up and down along lamp stand (1)
It is dynamic, it is provided with the first fixed seat (12064) for fixation of advertisement flag on the outer wall of first annulus (12061), described the
Two mobile devices (1207) include the second annulus (12071), and second annulus (12071) is sleeved on lamp stand (1), the second circle
There are four the second idler wheels (12072), four the second idler wheels (12072) to connect respectively by second for setting on the inner wall of ring (12071)
Fitting (12073) is fixed on the inner wall of the second annulus (12071), and four the second idler wheels (12072) are equal along the second annulus (12071)
Cloth is arranged, and four the second idler wheels (12072) can only roll up and down along lamp stand (1), outside second annulus (12071)
It is provided with the second fixed seat (12074) for fixation of advertisement flag on wall, rotating handle (1210) is set on the third idler wheel.
4. LED energy-conserving road lamps as claimed in claim 3, it is characterised in that：It is provided with winder on the drawstring (1208)
(1209)。
5. LED energy-conserving road lamps as described in claim 1, it is characterised in that：The energy supply control module (7) is STM32L151
Control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820317444.1U CN207880659U (en) | 2018-03-07 | 2018-03-07 | A kind of LED energy-conserving road lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820317444.1U CN207880659U (en) | 2018-03-07 | 2018-03-07 | A kind of LED energy-conserving road lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207880659U true CN207880659U (en) | 2018-09-18 |
Family
ID=63496934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820317444.1U Active CN207880659U (en) | 2018-03-07 | 2018-03-07 | A kind of LED energy-conserving road lamps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207880659U (en) |
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2018
- 2018-03-07 CN CN201820317444.1U patent/CN207880659U/en active Active
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