CN2294378Y - Suspending type fluorescent lamp's pendant with back side small angle visor - Google Patents

Abstract

The utility model relates to a suspended type daylight lamp bracket. When the light is used for normal illumination, the utility model doesn't form counterlight effect behind a lamp (which is relative to a blackboard which is arranged in the front of a classroom). The utility model is characterized in that a shading plate is arranged behind the lamp bracket, under the condition that the lamp bracket is provided with a transverse cross section, an intersection angle of the cross section between a point of the shading plate on the lower end of the cross section and a tangent of the lower end of a cross section circle of the same cross section and a vertical perpendicular line from a point of tangent are between 35 DEG and 50 DEG, and therefore, a person which is on a back position in the classroom can not be damaged by the front counterlight effect when the person views flatly and forward.

Description

Rear side low-angle shadow shield suspension type Fluorescent lamp bracket

The utility model relates to a kind of fluorescent lighting fixtures, is a kind of illumination light that this device sent in use (as for the blackboard in classroom, meeting room the place ahead, dais) Fluorescent lamp bracket of irradiation on a large scale backward that stops.

At present, the employed suspension type Fluorescent lamp bracket that in classroom, common conference chamber, is used to throw light on, its structure has two kinds substantially.A kind of is the Fluorescent lamp bracket that both sides do not have shadow shield, a kind of is that both sides have shadow shield, and two side visors are seen under the situation of whole lamp bracket being done cross section, the lower end tangent line of the point of its rear side (as for the blackboard in classroom, meeting room the place ahead, the dais) lower end of shadow shield in the cross section itself and the cross section circle of fluorescent-lamp tube in same cross section, with the cross section angle of the vertical vertical line of this point of contact beginning certainly in the scope of 75-90 degree, Fluorescent lamp bracket.Such Fluorescent lamp bracket, when using night, exist such problem, because of this lamp bracket light when (as saying with respect to classroom, the blackboard in meeting room the place ahead, dais) backward shines on the large-scale desk, also shine on almost same people's on a large scale thereafter the eyes.Like this, be sitting in the classroom people of position after a while, when looking squarely blackboard or dais forward, its eye just is subjected to the interference and the injury of its anterior all fluorescent lamp light.This injury forms a kind of backlight negative effect.On the one hand, be subjected to the effect of this backlight negative effect, influence those be arranged in classroom, meeting room after a while the people of position see the writing on the blackboard or the explanation in dead ahead clearly, thereby influence study and exchanging; On the other hand, be subjected to the effect of this backlight negative effect, aggravated the fatigue of these people's optic nerves, thereby influence the health of its optic nerve.This problem, the suffered injury of the people who sits in the last row in using the classroom of existing Fluorescent lamp bracket is the most serious.

The purpose of this utility model, be that a kind of Fluorescent lamp bracket that uses in classroom, common conference chamber will be provided, the irradiation on a large scale of (as for the blackboard in classroom, meeting room the place ahead, dais) backward that it can stop fluorescent lamp light effectively, thereby light modulation light on the controll day backlight negative effect of (as for the blackboard in classroom, meeting room the place ahead, dais) backward.

The purpose of this utility model is achieved like this: at the rear portion of Fluorescent lamp bracket (as with respect to the classroom, the blackboard in meeting room the place ahead, the dais) with light-proof material a shadow shield to the back lower place is set, and make shadow shield, under the situation of whole lamp bracket being made cross section, see, the lower end tangent line of the point of the lower end of this shadow shield in the cross section and the fluorescent-lamp tube cross section circle in same cross section, with the angle of vertical vertical line in the cross section at this point of contact certainly, in the scope of 35-50 degree, thereby each fluorescent lamp light is not being influenced when being positioned at the illumination below this lamp lamp, utilize the opaqueness of shadow shield, reached stop this fluorescent lamp light to lamp after (as with respect to the classroom, the blackboard in meeting room the place ahead, the dais) purpose of the generation of the backlight negative effect of shining on a large scale.

The utility model, because of to rear side (as with respect to the classroom, the blackboard in meeting room the place ahead, the dais) shadow shield has been made controll day light modulation light backward (as with respect to the classroom, the blackboard in meeting room the place ahead, the dais) range of exposures is the setting of purpose, prevented that effectively fluorescent lamp light is backward (as with respect to the classroom, the blackboard in meeting room the place ahead, the dais) generation of backlight negative effect on a large scale, thereby, can be on the one hand, help being positioned at the classroom, in the meeting room after a while the people of position can see the writing on the blackboard in the place ahead like a cork clearly, object view, on the other hand, the eyes that prevented these people bear unnecessary influence and injury, help the health of these eyes.

Further specify below in conjunction with drawings and Examples:

What accompanying drawing was given is the transverse sectional view of lamp bracket.

In this transverse sectional view: 1. be lamp bracket frame box part, dress ballast in the same with common Fluorescent lamp bracket, connecting line, side dress starter 2. is that the lamp bracket rear side is (as with respect to the classroom, the blackboard in meeting room the place ahead, the dais) shadow shield, by light-proof material make 3. for fluorescent-lamp tube 4. (as with respect to back side visor 2 shadow shields, making A. by light-proof material is that rear side in the schematic diagram is (as with respect to the classroom for the front side, the blackboard in meeting room the place ahead, the dais) terminal B of shadow shield lower end. for point of contact, the lower end BC. of the cross section circle of back side visor lower end terminal A and fluorescent tube (3) in the schematic diagram be from the B point under vertical vertical line b. be formed angle in this cross section by line AB and line BC

In the embodiment shown in the figures, under the situation of whole lamp bracket being made cross section, see, the point (A) of the lower end of back side visor (2) in the cross section and the round lower end tangent line (AB in the cross section of fluorescent-lamp tube (3) in same cross section, B is the point of contact), with the angle (b) of vertical vertical line (BC) in the cross section of this point of contact (B) certainly, be preferably in the scope of 35-50 degree.

Claims (1)

1. A kind of suspension type Fluorescent lamp bracket, it is characterized in that: (as for the blackboard in classroom, meeting room the place ahead, dais) is provided with a shadow shield to the back lower place with light-proof material at the rear portion of suspension type Fluorescent lamp bracket, and make shadow shield, under the situation of whole lamp bracket being made cross section, see, the lower end tangent line of the point of the lower end of this shadow shield in the cross section and the fluorescent-lamp tube cross section circle in same cross section, with the angle of vertical vertical line in the cross section at this point of contact certainly, in the scope of 35-50 degree.

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