CN206890171U - A kind of adjustable light bar structure of irradiating angle and light bar mounting structure - Google Patents

A kind of adjustable light bar structure of irradiating angle and light bar mounting structure Download PDF

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Publication number
CN206890171U
CN206890171U CN201720555216.3U CN201720555216U CN206890171U CN 206890171 U CN206890171 U CN 206890171U CN 201720555216 U CN201720555216 U CN 201720555216U CN 206890171 U CN206890171 U CN 206890171U
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CN
China
Prior art keywords
light
light bar
irradiating angle
turnbarrel
bar
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Expired - Fee Related
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CN201720555216.3U
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Chinese (zh)
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钟焕锋
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Individual
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Individual
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

House ornamentation or frock field are the utility model is related to, discloses a kind of adjustable light bar structure of irradiating angle and light bar mounting structure.By configuring bar shaped lamp housing, turnbarrel, turnbarrel holder and column for the strip light source plate in light bar structure, on the one hand it may be such that the light that strip light source plate is launched can be by the regulation of irradiating angle, more project in ceiling, ground, metope and room space, it is the illuminating effect to whole room that the environment of light bar is interspersed into effect promoting, change traditional direct light mode, on the other hand occlusion effect of the light trough environment to light can be reduced, the luminous energy reduced in light trough interior zone consumes, and realizes the purpose for saving electric energy.Simultaneously because light bar light emitting source is still to be hidden in light trough, while illuminating effect is provided, the directly incident human eye of light of light bar light emitting source can also be avoided, although solving the problems, such as that traditional lighting light fixture is highlighted dazzling, beneficial to the life or work of people.

Description

A kind of adjustable light bar structure of irradiating angle and light bar mounting structure
Technical field
The utility model is related to house ornamentation or frock field, in particular it relates to a kind of adjustable light bar structure of irradiating angle and Light bar mounting structure.
Background technology
In current house ornamentation or frock, light bar generally is being arranged positioned at the light trough bottom of room top edge, to be room Between illumination environment be provided intersperse effect, but be limited by the irradiating angle of light bar and the height of light trough shadow shield, it is actual to play Illuminating effect is not strong.Existing light bar mounting structure as shown in Figure 1, is primarily present following three defect:(1) it is limited by conventional lamp The shading of shadow shield 801 with 9 lighting angle (about 120 °) and light trough 8 influences, and as shown by arrows, light is in light trough 8 There is luminous energy consumption in interior zone (place that i.e. ordinary person can't see), the height of shadow shield 801 is higher, and the depth of light trough 8 is deeper, The luminous energy of consumption is more, and generally, the accounting for consuming luminous energy can be more than 30%;(2) width of light trough 8 is limited by, it is conventional By the fringe region of the interior zone for being radiated at light trough 8 and top ceiling, (it effectively shines most of light that light bar 9 is sent Bright width is about in 50cm or so), for whole ceiling, small part region is only accounted for, the illumination without practicality is imitated Fruit;(3) irradiating angle for being limited by conventional light bar 9 is fixed (being usually zero degree, i.e., main transmitting light is parallel with metope), Transmitting light will largely be reflected back the interior zone of light trough 8 after top ceiling is irradiated to, and only small part can reflex to On ground, metope and room space so that the light luminance in whole room is dark, it is necessary to be reconfigured at one in ceiling center Or multiple illuminating lamps.
To sum up, existing conventional light bar exists due to the installation site in light trough is relatively low and irradiating angle is fixed The problem of luminous energy loss is greatly and effective irradiated area is small so that it is limited to the illuminating effect in whole room, it is unfavorable for saving.
Utility model content
For existing conventional light bar due to the installation site in light trough is relatively low and irradiating angle is fixed, light be present The problem of big and effective irradiated area is small can be lost, the utility model provides a kind of adjustable light bar structure of irradiating angle and lamp Band mounting structure.
The technical solution adopted in the utility model, a kind of adjustable light bar structure of irradiating angle is on the one hand provided, including Strip light source plate, bar shaped lamp housing, turnbarrel, turnbarrel holder and column, wherein, the single line on the strip light source plate It is disposed with several lamp beads, the height of the column is less than 10~15mm of depth of light trough to be installed row;The strip source Plate is fixed in the bar shaped lamp housing, and the part of the bar shaped lamp housing is nested by the turnbarrel, and the turnbarrel is by institute The clamping of turnbarrel holder is stated, the turnbarrel holder is fixed on the top of the column.
Optimization, when a plurality of strip light source plate is sequentially connected in series, two adjacent strip light source plates are connected by electric lead.Enter One-step optimization, it is provided with the buckle structure for conductance thread end described in grafting in the end of the strip light source plate.
Optimization, include the constant-current driving power supply of the electrical connection strip light source plate.
Optimization, the bar shaped lamp housing is formed by aluminium sheet compacting.
Optimization, it is provided with two in the inwall of the turnbarrel and is used to engage the spacing of the strip light shell-side edge Bar.
Optimization, the turnbarrel holder uses elastic arm clamping structure or yoke configurations.
Optimization, the column is Liftable type column.
Optimization, the column is insulation column.
The technical solution adopted in the utility model, on the other hand additionally provide a kind of adjustable light bar installation knot of irradiating angle Structure, the adjustable light bar structure of the foregoing irradiating angle of linear arrangement in the light trough of edge at the top of room.
To sum up, using the adjustable light bar structure of irradiating angle provided by the utility model and light bar mounting structure, have Following beneficial effect:(1) by configuring bar shaped lamp housing, turnbarrel, rotary sleeve collet chuck for the strip light source plate in light bar structure Gripping member and column, on the one hand strip light source plate, bar shaped lamp housing and turnbarrel can be combined into a rotatable bar shaped hair Body of light, realize that light bar is rotatable and its adjustable purpose of irradiating angle, and then make it that the light that strip light source plate is launched can So that by the regulation of irradiating angle, more projection (direct projection or reflection), will into ceiling, ground, metope and room space It is the illuminating effect to whole room that the environment of light bar, which intersperses effect promoting, changes traditional direct light mode, on the other hand Column and turnbarrel holder can be utilized to increase setting height(from bottom) of the light bar light emitting source in light trough, and then light trough ring can be reduced Is reduced in border (especially light trough shadow shield) by the luminous energy consumption in light trough interior zone, realizes and saves electricity for the occlusion effect of light The purpose of energy, can power saving more than 60% relative to conventional lights band under equal illumination effect;(2) can be at the top of room The light bar structure is installed in the light trough of edge, makes the central area of ceiling because the convergence of four cowl lamp light acts on and is in highlighted Degree state, the use of additional illumination light fixture is reduced, especially for the parlor or room within 30 square metres, light bar light emitting source hair Light has reached the use of sufficient light demand;(3) because the surrounding of light bar structure is arranged, light bar light emitting source surrounding can be made to light, with Just more light pass through metope reflection to provide secondary illumination, room for promotion illuminating effect;(4) because light bar light emitting source is still It is hidden in light trough, while illuminating effect is provided, the directly incident human eye of light of light bar light emitting source can be avoided, solves to pass Although the problem of illuminator of uniting is highlighted but dazzling, beneficial to the life or work of people;(5) because the light bar light emitting source that shadow is hidden is sent out Light has met lighting demand, then other lamp decorations that can be seen on surface can only do the brightness of very little, or even conventional 100 watts Headlight, it is proposed that only make more than ten watts, U.S. of the profile of lamp decoration is just lighted in brightness, allows what lamp decoration bursted forth in the case where turning on light It is more beautiful, but because the brightness ratio of lamp decoration is relatively low, let us can heartily appreciate lamp decoration for a long time in the case where turning on light Moulding U.S., solve the more and more good-looking lamp decoration of in the market, brightness is low after turning on light, or because it is local too it is bright cause it is dazzling The problem of;(6) the light bar structure and light bar mounting structure are also with setting height(from bottom) is adjustable, steadiness is high, simple in construction and easy In realize the features such as, it is easy to practical application and popularization.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is existing light bar mounting structure schematic diagram.
Fig. 2 is the adjustable light bar structural representation of irradiating angle provided by the utility model.
Fig. 3 is the connection diagram of the strip light source plate provided by the utility model in light bar structure.
Fig. 4 is the assembling of revoling tube, revoling tube holder and pillar provided by the utility model in light bar structure Schematic diagram.
Fig. 5 is the adjustable light bar mounting structure schematic diagram of irradiating angle provided by the utility model.
In above-mentioned accompanying drawing:1st, strip light source plate 101, lamp bead 102, buckle structure 2, bar shaped lamp housing 3, turnbarrel 4th, turnbarrel holder 5, column 6, electric lead 7, constant-current driving power supply 8, light trough 801, shadow shield 9, conventional light bar.
Embodiment
Hereinafter with reference to accompanying drawing, it is adjustable that irradiating angle provided by the utility model is described in detail by way of example Light bar structure and light bar mounting structure.Herein it should be noted that being used to help understand for the explanation of these way of example The utility model, but do not form to restriction of the present utility model.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, expression may have three kinds of passes System, for example, A and/or B, can be represented:Individualism A, individualism B, while tri- kinds of situations of A and B, the terms be present "/and " it is another affiliated partner relation of description, expression may have two kinds of relations, for example, A/ and B, can be represented:Individually deposit In A, two kinds of situations of individualism A and B, in addition, character "/" herein, it is that a kind of "or" is closed to typically represent forward-backward correlation object System.
Embodiment one
Fig. 2 shows the adjustable light bar structural representation of irradiating angle provided by the utility model, and Fig. 3 shows this practicality The connection diagram of strip light source plate in light bar structure of new offer, Fig. 4 shows provided by the utility model in light bar The assembling schematic diagram of revoling tube, revoling tube holder and pillar in structure, Fig. 5 show irradiation provided by the utility model The light bar mounting structure schematic diagram of adjustable angle.
The adjustable light bar structure of the irradiating angle that the present embodiment provides, including strip light source plate 1, bar shaped lamp housing 2, rotation Rotaring sleeve 3, turnbarrel holder 4 and column 5, wherein, it is disposed with several lamps on the strip light source plate 1 single line row Pearl 101, the height of the column 5 are less than 10~15mm of depth of light trough to be installed;The strip light source plate 1 is fixed on the bar In shape lamp housing 2, the part of the bar shaped lamp housing 2 is nested by the turnbarrel 3, and the turnbarrel 3 is by the turnbarrel Holder 4 clamps, and the turnbarrel holder 4 is fixed on the top of the column 5.
As shown in Figure 2-5, in the light bar structure, the strip light source plate 1 is used for the light emitting source as light bar, profit Realized with the lamp bead 101 of single line row arrangement and linearly lighted, it can be, but not limited to as aluminium base light source board;In addition, the strip light The length of source plate 1 can be pre-designed according to actual installation demand or Assembling.The bar shaped lamp housing 2 is used to be used as institute State the hard carrier of strip light source plate 1, also to realize the rotation of whole light bar light emitting source when it rotates, its can with but it is unlimited Formed in by aluminium sheet compacting, not only production cost is low, can also utilize the high reflection feature of aluminium sheet, further lifting illumination effect Fruit, while high the characteristics of radiating of aluminium sheet, the effect of further prolonging service lives of lamps can also be utilized;In addition, the strip light The length of shell 2 needs and the length of the strip light source plate 1 matches, and be pre-designed according to actual installation demand or Assembling.The turnbarrel 3 is used for the part of the nested bar shaped lamp housing 2, as shown in Fig. 2 the turnbarrel 3 is nested At the both ends of the bar shaped lamp housing 2, the series connection of more bar shaped lamp housings 2 is realized, can also be nested in the bar shaped lamp housing 2 Portion, to provide midfoot support with reference to the turnbarrel holder 4 and the column 5;When the turnbarrel 3 rotates The bar shaped lamp housing 2 is driven to rotate, it can be, but not limited to (Polycarbonate, gather from clear glass material or transparent PC Carbonic ester) material is made, not only insulate but also ease of assembly.
The turnbarrel holder 4 is used to grip the turnbarrel 3 for having mixed up angle, so as to which light bar is sent out The irradiating angle of light source is fixed up, and it can be, but not limited to use the clamp structures such as elastic arm clamping structure or yoke configurations, such as Shown in Fig. 2 and 4, as what is further optimized, the elastic arm clamping structure of the use of turnbarrel holder 4, not only simple in construction, It is high to clamp steadiness, the rotation to the turnbarrel 3 can also be realized under clamp position, and then conveniently adjust light bar at any time The irradiating angle of light emitting source, make installation more flexible.The column 5 is used to support the turnbarrel holder 4, is the bar shaped The rotation of lamp housing 2 and light belt provides certain revolution space, in addition, being additionally operable to increase installation height of the light bar light emitting source in light trough Degree, while the height of the column 5 is less than 10~15mm of depth of light trough to be installed, and light bar light emitting source can be made to be immediately lower than light trough The height of shadow shield, that is, the raising of illuminating effect is ensure that, turn avoid transmitting light and directly enter human eye, it can be according to be installed The depth of light trough 8 carry out matched design, such as when the depth of light trough 8 is 7cm, the height of the column 5 can be by producer It is pre-designed between 5.5~6cm, the height error of all columns 5 is no more than 5mm.Further optimize, for anti-leak-stopping Electricity, lift house security, the column 5 preferably insulation column, such as wooden post.
Based on the description of aforementioned lamps band structure, by configuring bar shaped lamp housing 2, rotation for the strip light source plate 1 in light bar structure Rotaring sleeve 3, turnbarrel holder 4 and column 5, on the one hand can be by 3 groups of strip light source plate 1, bar shaped lamp housing 2 and turnbarrel A rotatable bar shaped illuminator is synthesized, realizes that light bar is rotatable and its adjustable purpose of irradiating angle, and then causes bar shaped The light that light source board 1 is launched can by the regulation of irradiating angle, more project (direct projection or reflection) to ceiling, In face, metope and room space, it is the illuminating effect to whole room that the environment of light bar is interspersed into effect promoting, is changed traditional Direct light mode, on the other hand column 5 and turnbarrel holder 4 can be utilized to increase peace of the light bar light emitting source in light trough Dress height, and then light trough environment (especially light trough shadow shield) can be reduced to the occlusion effect of light, reduce in light trough inner area Domain luminous energy consumption, realize save electric energy purpose, under equal illumination effect, relative to conventional lights band can power saving 60% with On.Simultaneously because light bar light emitting source is still to be hidden in light trough, while illuminating effect is provided, light bar light emitting source can be avoided The directly incident human eye of light, although solving the problems, such as that traditional lighting light fixture is highlighted dazzling, beneficial to the life or work of people. In addition, the light bar structure also has the characteristics that steadiness is high, simple in construction and be easily achieved, it is easy to practical application and popularization.
Optimization, when a plurality of strip light source plate 1 is sequentially connected in series, two adjacent strip light source plates 1 pass through the phase of electric lead 6 Even.As shown in figure 3, being acted on by the series connection of the electric lead 6, all strip light source plates 1 can be made all by same power supply Driving, and the flexible assembling of strip light source plate 1 is further realized, such as it is assembled into longer linear light source board or fold-line-shaped light Source plate.Further optimize, in order to lift the steadiness of electrical connection, as shown in figure 3, being set in the end of the strip light source plate 1 There is the buckle structure 102 for the end of electric lead described in grafting 6.
Optimization, include the constant-current driving power supply 7 of the electrical connection strip light source plate 1.As shown in Fig. 2 the constant current Driving power 7 is used for external civil power (such as AC220V), and alternating current is converted into constant-current dc electricity, is driven with synchronous described All lamp beads 101 in strip light source plate 1 are luminous.
Optimization, it is provided with two in the inwall of the turnbarrel 3 and is used to engage the spacing of the lateral edges of bar shaped lamp housing 2 Bar 301.As shown in figure 4, by setting the positive stop strip 301, the nested bar shaped of the turnbarrel 3 can be further lifted The steadiness of lamp housing 2, it is ensured that be not in loosen when rotated.
Optimization, the column 5 is Liftable type column.The Liftable type column can be, but not limited to use screw thread liter Drop pipe, so as to which in installation process, according to the actual grade of light trough 8, the height progress to light bar light emitting source is micro- at the scene Adjust, further facilitate flexible installation.In addition it is also possible to according to the actual grade of client's light trough to be installed, by producer in shipment The column of most reasonable altitudes is matched to user, reduces the installation steps of user's fine setting.
The adjustable light bar structure of the irradiating angle and light bar mounting structure that the present embodiment provides, have following beneficial to effect Fruit:(1) by configuring bar shaped lamp housing, turnbarrel, turnbarrel holder and column for the strip light source plate in light bar structure, On the one hand strip light source plate, bar shaped lamp housing and turnbarrel can be combined into a rotatable bar shaped illuminator, realizes lamp With the adjustable purpose of rotatable and its irradiating angle, and then the light that strip light source plate is launched passes through illumination angle The regulation of degree, (direct projection or reflection) is more projected into ceiling, ground, metope and room space, by the environment point of light bar It is the illuminating effect to whole room to sew effect promoting, changes traditional direct light mode, on the other hand can utilize column And turnbarrel holder increases setting height(from bottom) of the light bar light emitting source in light trough, and then light trough environment (especially lamp can be reduced Groove shadow shield) to the occlusion effect of light, the luminous energy reduced in light trough interior zone consumes, and realizes the purpose for saving electric energy, , can power saving more than 60% relative to conventional lights band under equal illumination effect;(2) because light bar light emitting source is still to be hidden in light trough In, while illuminating effect is provided, the directly incident human eye of light of light bar light emitting source can be avoided, solves traditional lighting light fixture Although the problem of highlighted but dazzling, beneficial to the life or work of people;(3) overturning conventional surface can see headlight to brightness demand Requirement, be more responsible for interspersing effect from this headlight, be reduced as far as may dazzling brightness, allow lamp decoration it is how good-looking why Light, if it is comfortable can be wilful turn brightness down, can provide brightness not dazzling enough to the demand light bar of light;(4) The light bar structure and light bar mounting structure also have that setting height(from bottom) is adjustable, steadiness is high, simple in construction and the spy such as be easily achieved Point, is easy to practical application and popularization.
Embodiment two
A kind of concrete application scheme of the present embodiment as light bar structure described in embodiment one, its irradiating angle provided can The light bar mounting structure of tune is as follows:Linear arrangement is as described in embodiment one in the light trough 8 of edge at the top of room The adjustable light bar structure of irradiating angle.By this light bar mounting structure, the central area of ceiling can be made because of four cowl lamp light Convergence effect and be in high brightness state, the use of reduction additional illumination light fixture, especially for the room within 30 square metres, Lighting demand can be can reach because light bar light emitting source is luminous, and save the cost of installation illuminator, and make ceiling more whole It is clean attractive in appearance.Simultaneously because the surrounding arrangement of light bar structure, can make light bar light emitting source surrounding light, to there is more light to pass through wall Face is reflected to provide secondary illumination, room for promotion illuminating effect., can be with addition, in order to further improve spatial illumination effect In the bottom surface of the light trough 8 or internal face attachment high reflection dope layer.
The adjustable light bar mounting structure of the irradiating angle that the present embodiment provides, base of its technique effect in embodiment one On plinth, also have the following technical effect that:(1) central area of ceiling can be made because the convergence of four cowl lamp light acts on and is in highlighted Degree state, the use of additional illumination light fixture is reduced, especially for the room within 30 square metres, can be sent out because of light bar light emitting source Light i.e. can reach lighting demand, other lamp decorations that can see can reduce brightness as much as possible, allow lamp decoration moulding U.S., It is more beautiful in the case where turning on light, it is but again not dazzling;(2) because the surrounding of light bar structure is arranged, light bar light emitting source four can be made Zhou Faguang, to there are more light to pass through metope reflection to provide secondary illumination, room for promotion illuminating effect.
As described above, it can preferably realize the utility model.For a person skilled in the art, it is new according to this practicality The teaching of type, design the adjustable light bar structure of various forms of irradiating angles and light bar mounting structure and do not need creativeness Work.These embodiments are changed in the case where not departing from principle of the present utility model and spirit, change, replaced, whole Close and modification is still fallen within the scope of protection of the utility model.

Claims (10)

1. a kind of adjustable light bar structure of irradiating angle, it is characterised in that including strip light source plate (1), bar shaped lamp housing (2), rotation Rotaring sleeve (3), turnbarrel holder (4) and column (5), wherein, it is disposed with the strip light source plate (1) single line row Several lamp beads (101), the height of the column (5) are less than 10~15mm of depth of light trough to be installed;
The strip light source plate (1) is fixed in the bar shaped lamp housing (2), and the part of the bar shaped lamp housing (2) is by the rotation Sleeve (3) is nested, and the turnbarrel (3) is clamped by the turnbarrel holder (4), the turnbarrel holder (4) It is fixed on the top of the column (5).
2. a kind of adjustable light bar structure of irradiating angle as claimed in claim 1, it is characterised in that when a plurality of strip light source plate (1) when being sequentially connected in series, two adjacent strip light source plates (1) are connected by electric lead (6).
3. a kind of adjustable light bar structure of irradiating angle as claimed in claim 2, it is characterised in that in the strip light source plate (1) end is provided with the buckle structure (102) for electric lead (6) end described in grafting.
4. a kind of adjustable light bar structure of irradiating angle as claimed in claim 1, it is characterised in that also include described in electrical connection The constant-current driving power supply (7) of strip light source plate (1).
A kind of 5. adjustable light bar structure of irradiating angle as claimed in claim 1, it is characterised in that the bar shaped lamp housing (2) Formed by aluminium sheet compacting.
6. a kind of adjustable light bar structure of irradiating angle as claimed in claim 1, it is characterised in that in the turnbarrel (3) inwall is provided with two positive stop strips (301) for being used to engage bar shaped lamp housing (2) lateral edges.
A kind of 7. adjustable light bar structure of irradiating angle as claimed in claim 1, it is characterised in that the turnbarrel clamping Part (4) uses elastic arm clamping structure or yoke configurations.
8. a kind of adjustable light bar structure of irradiating angle as claimed in claim 1, it is characterised in that the column (5) is can Lift column.
9. a kind of adjustable light bar structure of irradiating angle as claimed in claim 1, it is characterised in that the column (5) is exhausted Edge column.
A kind of 10. adjustable light bar mounting structure of irradiating angle, it is characterised in that the light trough in the edge at the top of room (8) the adjustable light bar structure of linear arrangement irradiating angle as claimed in any one of claims 1 to 9 wherein in.
CN201720555216.3U 2017-05-18 2017-05-18 A kind of adjustable light bar structure of irradiating angle and light bar mounting structure Expired - Fee Related CN206890171U (en)

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CN201720555216.3U CN206890171U (en) 2017-05-18 2017-05-18 A kind of adjustable light bar structure of irradiating angle and light bar mounting structure

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Application Number Priority Date Filing Date Title
CN201720555216.3U CN206890171U (en) 2017-05-18 2017-05-18 A kind of adjustable light bar structure of irradiating angle and light bar mounting structure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106996520A (en) * 2017-05-18 2017-08-01 钟焕锋 A kind of adjustable light bar structure of irradiating angle and light bar mounting structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106996520A (en) * 2017-05-18 2017-08-01 钟焕锋 A kind of adjustable light bar structure of irradiating angle and light bar mounting structure

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Granted publication date: 20180116