CN2070397U

CN2070397U - High-efficient blackboard lighting device

Info

Publication number: CN2070397U
Application number: CN90201088U
Authority: CN
Inventors: 关福民; 李源志
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-01-25
Filing date: 1990-01-25
Publication date: 1991-01-30

Abstract

The utility model discloses a high-efficient blackboard lighting device, mainly comprising a ballast, a compact type energy-saving fluorescent light, a high spotlight cylindrical surface reflector special designed for matching the compact type energy-saving fluorescent light with the bus compounded as single or three sets of parabolas. The utility model cam produce more homogeneous lighting effect on a blackboard, so that students are free from glare effect in the observation area. On the other hand, with just a lighting lamp of about 10 watt, about 100LUX illuminance can be produced on the centre of a two square meter blackboard. Therefore, the utility model is a lighting device with high efficiency, energy saving and good photochromics specialized used for blackboards illumination. The utility model has the advantages of simple structure, light weight, small size and low cost. The utility model can also be comprehensively used for illumination of advertising columns or notice boards.

Description

High-efficient blackboard lighting device

A kind of high effect, illumination that is used for classroom blackboard illumination.

Existing classroom illumination lamp adopts ordinary lamp and lantern, is installed on the ceiling of front upper place, dais, holds concurrently for the blackboard illumination, and light source is far away apart from blackboard, and illumination efficiency is lower, and power consumption is high, and the lamp lighting angle is low, causes reflective in the observation of students scope; Employing often causes illumination unevenness near the fluorescent lamp lighting that installs additional of blackboard top, and has shortcomings such as flicker and colour rendering difference, so be difficult for accepting popularization for people.

The utility model provides a kind of the efficient of blackboard illumination that be specifically designed in order to overcome above-mentioned shortcoming, and energy-conservation, cost is low, and is photochromic good, and uniform lighting device throws light on.

The utility model is achieved in that and adopts the light efficiency height, colour rendering is good, the energy-saving fluorescent lamp of flicker free phenomenon (comprising H type fluorescent lamp), strict cooperate this kind compact fluorescent lamp to design a kind of bus to be the high optically focused cylinder reflection shield of compound parabolic and forked type to prop up of being configured to simple in structure, the lighting device of small portable.This lamp installation is the 20-40 centimeters directly over blackboard, can on blackboard, produce illuminating effect comparatively uniformly, in the observation of students district, do not produce glare effect, and illuminating lamp only needs about 10 watts power consumption, can produce at two square metres blackboard center, illumination is illumination more uniformly about 100LUX, and colour rendering is more than 0.8.

Below in conjunction with accompanying drawing, provide embodiment of the present utility model in detail.

Fig. 1: blackboard illuminator structure schematic diagram.

Fig. 2: the compound parabolic line style bus of high optically focused cylinder reflection shield.

Among the figure: 1. fluorescent tube; 2. reflection shield; 3. support; 4. ballast.

As shown in Figure 1, the utility model reaches the ballast ［ 4 ］ that is electrically connected with it by the fluorescent tube or the light tube group ［ 1 ］ of straight tube-like light source, and ［ 3 ］ four critical pieces of reflection shield ［ 2 ］ and support constitute, and wherein, fluorescent tube ［ 1 ］ is a compact fluorescent lamp; Make bus with metal or sheet plastic and be cylinder reflection shields single or three groups of compound parabolic ［ 2 ］, as shown in Figure 2, wherein, arc AB, EF are parabola, and its focus is about O focal length 15mm, and arc BC and DE are O for the center of circle then, and radius is about 30mm; Arc CD focus is O, and the parabola about focal length 25mm or the center of circle are a, and radius is the circular arc about 50mm, and Oa is at a distance of about 25mm.The be not difficult locating notch and the aperture that preset by both sides of above-mentioned reflection shield (2) is fixed on the jag end of forked type support (3) with securing member.But technology should guarantee to be parallel to the symmetrical plane of reflection shield (2) cylinder crestal line and the plane angle (not drawing among the figure) that forked type support plane constitutes 57-77, the standard lamp socket of support (3) one ends guarantees that the fluorescent tube axis of insertion and the focal line of parabolic type cylinder coincide, the length of support arm should make fluorescent tube (1) and metope distance remain on about 40 centimetres, utilize two installing holes of support (3) bottom, light fixture can be installed on the illuminated metope, be installed in support (3) bottom by the wall place with the ballast (4) of fluorescent tube (1) coupling, and be electrically connected with lamp socket by the lead of settling along support (3) yoke.

In sum, the utility model has the advantages that fairly obviously, it can also be widely used in the illumination of billboard and notice board.

Claims

1, a kind of efficient blackboard lighting device, the ballast [4] that it is electrically connected with it by fluorescent tube or light tube group [1], reflection shield [2] and support [3] are formed, it is characterized in that above-mentioned fluorescent tube [1] is the straight tube-like light source, and the focal line of the axis of fluorescent tube [1] and reflection shield [2] cylinder coincides, reflection shield [2] is that a bus is single or the three groups of high optically focused cylinder of compound parabola reflection shields, and be fixed on the jag end of forked type support [3] with securing member, and on technology, guaranteeing to be parallel to reflection shield [2] symmetrical plane of post ridge and the plane angle that forked type support plane constitutes 57-77, the length of support [3] arm should guarantee that fluorescent tube and metope distance are about 40 centimetres.

2, blackboard lighting device according to claim 1, it is characterized in that three groups of compound parabolic of reflection shield ［ 2 ］ line or parabola are respectively: focus is O, parabola AB and EF about focal length 15mm; The center of circle is O, and radius is garden arc BC and the DE about 30mm; Focus is O, and the parabola CD about focal length 25mm or the center of circle are a, and radius is the garden arc CD about 50mm, and a 25mm is apart arranged.

3, blackboard lighting device according to claim 1 is characterized in that fluorescent tube ［ 1 ］ adopts light efficiency height, the compact energy-saving fluorescent lamp that colour rendering is good.