CN201462678U

CN201462678U - Street lamp reflective cover in double-arc shape

Info

Publication number: CN201462678U
Application number: CN2009201309750U
Authority: CN
Inventors: 辜茂军
Original assignee: Individual
Current assignee: Dongguan City Yanxin Energy-Saving Science & Technology Co Ltd
Priority date: 2009-04-27
Filing date: 2009-04-27
Publication date: 2010-05-12
Anticipated expiration: 2019-04-27

Abstract

A street lamp reflective cover in a double-arc shape comprises a reflector. The cross section of the reflector forms a double-arc shape formed by two same crossed arc surfaces, and the intersecting lines are straight lines. The two ends of the reflector are respectively spliced with a side panel. A light source is arranged above the intersecting lines rather than in the arc focal position, so most light rays can be radiated out of the reflective cover after one-time reflection, only a small part is radiated out of the reflective cover after two-time reflection, and no light rays are radiated out of the reflective cover after three-time reflection. Compared with traditional reflective covers, the utility model largely reduces light loss, increases the brightness of street lamps, and saves power.

Description

Two arc street lamp reflecting shades

Technical field

The utility model relates to a kind of lampshade, refers in particular to the reflection shield that a kind of street lamp is used, and belongs to optical field.

Background technology

After electric light was invented, people's life and social economy had obtained development faster, and what still bring is a large amount of consumption of the energy.Every day, each city, township or street all have a lot of street lamps to be used to illumination, and traditional street lamp reflecting shade is single parabolic shape structure, fluorescent tube or bulb are installed near this paraboloidal focus, according to optical principle, when light source is positioned at the parabolic focus position, emergent light is a directional light, therefore the light that shines the road surface is that the centre is very bright, and the next door is darker, and light is very inhomogeneous.And light need could penetrate reflection shield (nearly 30～40% light need pass through triple reflection) through secondary even triple reflection greatly, caused very big light loss consumption, and, through reflection repeatedly, the portion of energy of light is absorbed by reflection shield, makes that not only emergent ray brightness is low, power consumption increases, and the temperature of reflection shield is very high, causes the life-span of fluorescent tube sharply to shorten.

The utility model content

At above-mentioned shortcoming of the prior art, the utility model proposes a kind of reflection shield organization plan that more rationalizes, not only solved deficiency of the prior art, also saved a large amount of electric energy simultaneously.

For achieving the above object and effect, the technical scheme that this practicality is adopted is as follows:

Two arc street lamp reflecting shades comprise reflector and side cover plate, and the cross section of described reflector is two arcs, and it is to be intersected by two identical arcwall faces to form, and the gained intersection is a straight line.

Described reflector is at described intersection place, two arcs the tangent line vector become 110 °～130 ° angles, two arcwall faces can be parabola.

Two described side cover plates are that flat thin is tabular, and it seamlessly splices the two ends at described reflector, and both sides cover plate and described intersection angulation are 105 °～120 °.

Described reflector and side cover plate are made by nanometer film aluminium sheet or minute surface aluminium sheet, and its light reflectance can reach more than 95%.

Intersection central authorities as described in light emitting source (as fluorescent tube or bulb etc.) is installed in, and certain height is arranged apart from described intersection, because the crevice projection angle difference of light, utilize optical principle, in the close a bit of zone at described intersection place, secondary reflection can take place in light before penetrating, project other position light and then can directly reflect away.Simultaneously, because light emitting source is not in paraboloidal focal position, so the light that reflects is all basic identical towards the distribution of each direction, thereby make that the throw light on the road surface is even, brightness is soft.

Compare with prior art, the beneficial effects of the utility model are: the reflecting shade plate that adopts two arc shapes, and light source is installed in the boundary line of two arcs but not the focus place, the light major part (can reach more than 60%) that makes light source send can penetrate reflection shield through primary event, need the light of secondary reflection also to have only 5～8%, and do not need the light of triple reflection, compare the triple reflection rate and be 30～40% conventional road lamp reflection shield, real in saving electric energy widely, through estimation, its output light flux can increase more than 40%, promptly for same brightness demand, the power of required light source have only adopt employed light source power in the prior art 60%. secondly, light source is installed in intersection top rather than near the focus of arc, again the reverberation quantity that shines on the light source is significantly reduced, thereby avoided the post bake of light, prolong the service life of light source then largely light source.

Description of drawings

Fig. 1---the utility model reflector cross-sectional view;

Fig. 2---the utility model master cutaway view;

Fig. 3---the utility model stereogram;

Preferred embodiment of Fig. 4---the utility model;

Fig. 5---the utility model reflecting effect schematic diagram;

Fig. 6---the utility model emergent ray distribution map.

Among the figure, the 1-reflector; 2-side cover plate; The 3-intersection; The 4-light source.

The specific embodiment

Illustrate in greater detail the technical solution of the utility model and design feature below in conjunction with a description of drawings and a preferred embodiment.

As Fig. 1, Fig. 2 or shown in Figure 3, two arc street lamp reflecting shades comprise reflector 1 and side cover plate 2, the cross section of described reflector 1 is two arcs, it is to be intersected by two identical parabolas to form, and gained intersection 3 is a straight line, and the left and right sides span of this pair arc is 20～24cm.Described side cover plate 2 is plane thin plate.

Described reflector 1 is at described intersection 3 places, and the tangent line of two arc-shaped cross-sections vector becomes hexagonal angle (as shown in Figure 1).Two described side cover plates 2 seamlessly are welded on the two ends of described reflector 1, and both sides cover plate 2 is 120 ° (referring to Fig. 2) with described intersection 3 angulations.

Described reflector 1 and side cover plate 2 are made by nanometer film aluminium sheet or minute surface aluminium sheet, and its light reflectance can reach more than 95%.

With reference to Fig. 5, with light source 4 be arranged on described intersection 3 mid points directly over the 1.3cm place, the light major part that it sends (reaching 60% approximately) directly penetrates reflection shield through primary event, and remainder is that reflection promptly penetrates reflection shield, and the light that needs just to penetrate through secondary reflection reflection shield.And wherein, only have to be no more than 8% light and to need before penetrating reflection shield through secondary reflection, and this part light is to be radiated near one section zone of described intersection 3.In addition, the light that is radiated on the described side cover plate 2 then all can penetrate reflection shield through primary event.Like this, the utilization rate of light can improve largely, has optimized city illumination greatly, saves electric energy simultaneously.

Have again, in the utility model, with light source 4 be arranged on described intersection 3 directly over, by optical theory or daily experience as can be known, the light that light source 4 is sent is after the reflection shield reflection, and only a few can shine on the light source 4 again, so structure, can make light source 4 avoid the post bake of reflection ray, can play bigger direct effect the raising of radiating effect and service life of prolonging light source 4.

Referring to Fig. 6, when the utility model is installed on the street lamp, distribution uniform when its emergent ray projects ground: on the ground, near brightness maximum the utility model center corresponding points " 0 ", near the focus corresponding points of two arcs also brighter and and the brightness of central point corresponding position be more or less the same, general performance goes out brightness radiation response uniformly.And the little and decay fast for the brightness on very bright next door, centre of the light on conventional road lamp ground that reflection shield projects.By contrast, radiation response of the present utility model has obvious improvement.

Above-mentioned embodiment only is to be convenient to understand more intuitively technical characterstic of the present utility model; but not to its do limited exhaustive; staff for this area; understandablely be; under the inspiration of technical solutions of the utility model; also can do some improvement and modification to it. therefore, every any minor variations or modification of doing according to the technical solution of the utility model all should be considered as within its protection domain.

Claims

1. two arc street lamp reflecting shades comprise reflector (1), it is characterized in that: the cross section of described reflector (1) is two arcs, and it is to be intersected by two identical arcwall faces to form, and gained intersection (3) is a straight line.

2. as claimed in claim 1 pair of arc street lamp reflecting shade is characterized in that: described reflector (1) is located at described intersection (3), two arcwall faces tangent line vector become 110 ° of-130 ° of angles.

3. as claimed in claim 1 pair of arc street lamp reflecting shade is characterized in that: also comprise two flat side cover plates (2), described both sides cover plates (2) splicing is at the two ends of described reflector (1).

4. as claimed in claim 1 pair of arc street lamp reflecting shade is characterized in that: described side cover plate (2) is 105 °-120 ° with the angle of described intersection (3).

5. as claimed in claim 1 pair of arc street lamp reflecting shade is characterized in that: described two arcwall faces are for parabolic.

6. as claimed in claim 1 pair of arc street lamp reflecting shade is characterized in that: described reflector (1) and side cover plate (2) are made by nanometer film aluminium sheet or minute surface aluminium sheet.