CN211649940U

CN211649940U - Non-direct-lighting classroom lamp

Info

Publication number: CN211649940U
Application number: CN201922498868.XU
Authority: CN
Inventors: 严垒
Original assignee: Ningbo Lanlong Photoelectric Technology Co ltd
Current assignee: Ningbo Lanlong Photoelectric Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-09
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a non-direct-projection classroom lamp, including lamp shade (1), light-passing board (2), reflection chamber (3), LED lamp the bottom of light-passing board (2) is provided with grid (4), and lamp shade (1) is formed with reflection of light face (11) on the top surface towards light-passing board (2) one side, and reflection of light face (11) facing is equipped with first reflective membrane (5), and light emitting area (310) top-down of LED lamp plate (31) is gradually to reflection chamber (3) inner slope, and light emitting area (310) orientation reflection of light face (11) arrange. Compared with the prior art, the utility model discloses a light intercrossing that the LED lamp plate of classroom lamp both sides sent shines on the first reflective membrane of reflection of light face to through the multiple reflection on the reflective membrane, and mix the light in the reflection intracavity, avoid the concentration of light source on the LED lamp plate simultaneously, make the luminance in the reflection cavity saturate more, avoid appearing the light and shade contrast of light, thereby reduce the possibility that the glare produced.

Description

Non-direct-lighting classroom lamp

Technical Field

The utility model relates to a classroom lamp, concretely relates to non-perpendicular classroom lamp.

Background

The current classroom lamp usually utilizes light emitted by an LED to illuminate the interior, but because the LED light source is a point light source and the light-emitting surface is small, the visual discomfort of human eyes is easily caused, and glare is generated.

The existing LED lighting device has directional light emission, which is unidirectional light emission, and the LED emitting light generally directly faces the light emitting surface of the lighting device or faces the light emitting surface of the lighting device, and the existing anti-glare method of the LED lighting device mainly includes: the LED light source is shielded by the light-transmitting material with light diffusion or atomization, so that the identification degree of human eyes on the luminous LED light source is reduced, but when the distance between the LED light source and the light-transmitting material is small or the luminous intensity of the LED light source is high, the phenomenon that human eyes directly see the LED light source cannot be avoided, and glare is generated; in addition, the atomization material is usually arranged on the inner side surface of the lampshade to increase the thickness of the lampshade, so as to improve the haze of the lampshade, but the non-uniformity of the haze of the lampshade also causes the light-emitting surface to be non-uniform, and the problems of bright spots, visible spots and the like can occur.

At present, another anti-glare method is to design a certain shading angle on the lamp structure, so that human eyes cannot see the luminous LED light source within a certain elevation angle range.

Therefore, there is a strong need for a non-direct classroom lamp.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem to provide a classroom lamp of non-perpendicular incidence that avoids the LED light emitting source to concentrate and make the luminance saturation in the lamp in order to reach the reduction glare production to prior art's current situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a non-direct projection classroom lamp, includes the lamp shade and sets up the light-passing board in the lamp shade bottom, be formed with the reflection chamber between lamp shade and the light-passing board, the reflection intracavity all is provided with the LED lamp plate at the both ends that lie in light-passing board width direction, the LED lamp plate extends its characterized in that along the length direction of lamp shade: the bottom of light-passing board is provided with the grid, the lamp shade is formed with the reflection of light face on the top surface towards light-passing board one side, the reflection of light face facing is equipped with first reflective membrane, the light emitting area top-down of LED lamp plate slopes to the reflection intracavity gradually, just the light emitting area orientation the reflection of light face arranges.

The structure of the first reflective film adopts: the first reflective film comprises a first back adhesive, a first film substrate and a first high-reflection coating which are sequentially arranged from top to bottom, and the first back adhesive is attached to the reflective surface.

Preferably, the vertical section of the light reflecting surface is an arc section with a downward concave surface, and the curvature of the arc section

Wherein x and y are the abscissa and the ordinate of any point on the arc-shaped section, the value range of the parameter a is 120-150 mm, and the value range of the parameter b is 50-80 mm. Therefore, light emitted by the LEDs at two ends of the width direction of the light-transmitting plate is intersected with each other, and the light is fully reflected and mixed by the reflecting surface in the reflecting cavity, so that the concentration of an LED light source is better avoided, and the brightness in the reflecting cavity is more saturated.

Preferably, the value of the parameter a is 120mm, and the value of the parameter b is 70 mm.

Make things convenient for the heat dissipation of LED lamp plate when realizing the installation of LED lamp plate, the reflection intracavity all is provided with the radiator in light-passing board width direction's both sides, have on the top surface of radiator and supply the spacing groove of LED lamp plate installation.

In order to better avoid the concentration of a light source on the LED lamp panel, a second reflective film is attached to the light emitting surface of the LED lamp panel, and an opening for the luminous body on the LED lamp panel to pass is formed in the second reflective film. The existence of the reflective film increases the multiple reflection of the emitted light, thereby mixing the light, and enabling the light to be more saturated when being subsequently emitted to the reflective surface.

Preferably, the vertical cross section of the second reflective film is in a V shape and comprises a first film layer attached to the LED lamp panel and a second film layer attached to the radiator, and the first film layer is adjacent to the inner side edge of the lampshade. Like this, can cut off light to the light that the LED lamp plate jetted out to reduce light better and appear strong light and shade contrast.

The structural form of the second reflective film is as follows: the first film layer and the second film layer respectively comprise a second back adhesive, a second film substrate and a second high-reflection coating which are sequentially arranged from bottom to top, the second back adhesive of the first film layer is pasted on the light-emitting surface, and the second back adhesive of the second film layer is pasted on the corresponding position of the heat radiator.

In order to realize the installation of the light transmission plates and facilitate the better dissipation of heat on the light transmission plates, the inner side walls of the two heat radiators are respectively provided with a slot for inserting the corresponding outer side edge of the light transmission plate.

In order to facilitate the installation of the grating, the edges of the two sides of the lampshade are provided with folded edges which are bent towards the reflecting cavity, and an installation space for accommodating the grating is formed between the folded edges and the lower surface of the heat radiator.

Compared with the prior art, the utility model discloses a be provided with the LED lamp plate in the reflection intracavity of classroom lamp at the both sides that lie in the light-passing board, the light emitting area of the LED lamp plate of light-passing board both sides all slopes to the reflection intracavity from top to bottom gradually, and the light emitting area is towards the reflection surface arranges, at this moment, the light that the LED lamp plate of both sides sent intercrosses, shines on the first reflective membrane of reflection surface to through the multiple reflection on the reflective membrane, and mix light in the reflection intracavity, avoided the concentration of light source on the LED lamp plate simultaneously, make the luminance in the reflection cavity saturate more, avoid appearing the light and shade contrast of light, thereby reduce the possibility that the glare produced; in addition, the grating is arranged at the bottom of the light-transmitting plate, and light emitted by the light-transmitting plate is irradiated on the irradiated surface after being intercepted by the grating, so that the uniformity and softness of the emitted light are improved, and the possibility of glare is further avoided.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic perspective exploded view of an embodiment of the present invention;

fig. 3 is a partial schematic structural diagram of an embodiment of the present invention;

fig. 4 is a cross-sectional view of an embodiment of the invention;

FIG. 5 is a schematic view of a portion of the structure of FIG. 4 (with the power module removed);

fig. 6 is a schematic structural diagram of a heat sink according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a first retroreflective sheeting;

fig. 8 is a schematic structural view of a second reflective film according to an embodiment of the present invention;

fig. 9 is a cross-sectional view of a first layer (or a second layer) of a second retroreflective sheeting in accordance with an embodiment of the present invention;

FIG. 10 is an enlarged view of portion A of FIG. 4;

fig. 11 is a schematic diagram of the embodiment of the present invention after light is reflected by the reflective surface.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 11, the non-direct classroom lamp of the embodiment of the present invention includes a lampshade 1, a light-transmitting plate 2, an LED lamp panel 3, an LED lamp panel 31, a radiator 32, a power module 33, a grille 4, and an end cover 7, wherein,

light-transmitting board 2 sets up in lamp shade 1 bottom, be formed with reflection chamber 3 between lamp shade 1 and the light-transmitting board 2, lamp shade 1 is formed with reflection of light face 11 on the top surface towards light-transmitting board 2 one side, reflection of light face 11 facing is equipped with first reflective membrane 5, reflection of light chamber 3 inherent both sides that are located light-transmitting board 2 width direction all are provided with LED lamp plate 31, be provided with luminous body 311 on the LED lamp plate 31, this luminous body 311 is the LED lamp, foretell LED lamp plate 31 extends along the length direction of lamp shade 1, grid 4 sets up the bottom at light-transmitting board 2, the light emitting area 310 top-down slope gradually to reflection of light chamber 3 of LED lamp plate 31, and light emitting area 310 arranges towards reflection of light face 11, at this moment, the light that the LED lamp sent is through light-transmitting board 2 and grid 4 outgoing in proper order after. In addition, the light emitting surface 310 of the LED lamp panel 31 is a surface on which the LED lamp is disposed.

The vertical section of the reflecting surface 11 is an arc section with a downward concave surface and the curvature of the arc section

Wherein x and y are the abscissa and the ordinate of any point on the arc-shaped section, the value range of the parameter a is 120-150 mm, the value range of the parameter b is 50-80 mm, and preferably, the value of the parameter a is 120mm, and the value of the parameter b is 70 mm.

In order to make the heat on the LED lamp plate distribute away better, the both sides that are located 2 width direction of light-passing board in reflection chamber 3 all are provided with radiator 32, two radiator 32 installations are all installed on the inside wall of lamp shade, specifically, radiator 32 all have to the convex part 13 that extends in reflection chamber 3 on the double-phase internal wall of lamp shade 1, correspondingly, offer on the radiator 32 and supply to correspond the mounting groove 323 that the convex part 13 holding is wherein, radiator 32 passes through mounting groove 323 and the cooperation that corresponds convex part 13 and installs on the inside wall of lamp shade 1. The LED lamp panel 31 is disposed on the corresponding heat dissipation member 32, the mounting surface of the heat dissipation member 32 is provided with a limiting groove 321 for mounting the corresponding LED lamp panel 31, and the LED lamp panel 31 is disposed on the inner side wall of the lampshade 1 through the corresponding heat dissipation member 32.

In order to avoid concentration of light emitting sources on the LED lamp panel, the second reflective film 6 is arranged on the LED lamp panel 31, the vertical cross section of the second reflective film 6 is in a V shape, and comprises a first film layer 61 and a second film layer 62 connected with the first film layer 61, the first film layer 61 is adjacent to the inner side edge of the lampshade 1, the first film layer 61 is attached to the light emitting surface 310 of the LED lamp panel 31, and an opening 611 for the LED lamp to pass through is formed in the first film layer 61.

In order to facilitate the installation of the second reflective film 6, a mounting surface which is substantially V-shaped and on which the second reflective film 6 is placed is formed at the upper part of the heat radiator 32, and the mounting surface has a first mounting surface 32a adjacent to the inner edge of the lamp shade 1 and a second mounting surface 32b connected with the first mounting surface 32a, wherein the LED lamp panel 31 is arranged on the first mounting surface 32a, the limiting groove 321 is formed at a corner adjacent to the second mounting surface 32b and the first mounting surface 32a, and the second film layer 62 is attached to the second mounting surface 32 b.

The structural form of the first reflective film adopts: the first reflective film 5 comprises a first back adhesive 51, a first film substrate 52 and a first high-reflection coating 53 which are sequentially arranged from top to bottom, wherein the first back adhesive 51 is attached to the reflective surface 11; the structural form of the second reflective film adopts: the first film layer 61 and the second film layer 62 of the second reflective film both include a second adhesive tape 601, a second film base 602, and a second high-reflection coating 603 that are sequentially arranged from bottom to top, the second adhesive tape 601 of the first film layer 61 is attached to the light emitting surface 310 of the LED lamp panel 31, and the second adhesive tape 601 of the second film layer 62 is attached to the second mounting surface 32b of the heat sink 32.

The components of the first high-reflection coating and the second high-reflection coating mainly comprise high polymer resin, barium sulfate, a defoaming agent and a flatting agent, wherein the high polymer resin is a polyvinyl alcohol solution with the mass fraction of 0.5-17%, the particle size of the barium sulfate ranges from 800 meshes to 8100 meshes, and the mass of the barium sulfate is 0.5-1.5 times that of water.

In order to realize the installation of the transparent plate and facilitate the heat dissipation of the transparent plate, the inner side walls of the two heat radiators 32 are respectively provided with a slot 322 for inserting the corresponding outer edge of the transparent plate 2 therein, and the two side edges of the heat radiators 32 are inserted into the corresponding slots 322 and installed at the bottom of the lampshade 1. In addition, in order to realize the installation of the grille 4, the two side edges of the lampshade 1 are respectively provided with a folding edge 12 which is folded towards the interior of the reflection cavity 3, the folding edges 12 are positioned below the corresponding heat radiator 32, and an installation space 10 for accommodating the grille 4 is formed between the two folding edges 12 and the heat radiator 32.

The power module 33 is used to drive the light emitting body 311 on the LED lamp panel 31 to work, and in order to facilitate accommodation of the power module 33, an accommodating groove 110 is formed between the top wall of the lampshade 1 and the light emitting surface 11, in which the power module 33 is accommodated. In addition, end caps 7 are provided at both ends of the lamp housing 1, and the two end caps 7 close both ends of the reflective cavity 3.

The data of the light intensity corresponding to the light reflecting surfaces with different curvatures are as follows:

1)

a(mm)	b(mm)	light efficiency	Uniformity of the film
				120	50	60％	0.52
120	55	67％	0.58
				120	60	72％	0.65
120	65	75％	0.71
				120	70	80％	0.75

2)

a(mm)	b(mm)	Light efficiency	Uniformity of the film
				120	70	80％	0.75
125	70	79％	0.73
				130	70	77％	0.71
135	70	75％	0.68
				140	70	73％	0.65
145	70	68％	0.61
				150	70	63％	0.55

From the data, under the condition that the value of the parameter a is kept unchanged, the curvature rho of the arc-shaped section is gradually increased along with the gradual increase of the value of the parameter b, the light emitting efficiency is continuously increased, and the saturation uniformity of the light brightness in the reflection cavity is increased; under the condition that the value of the parameter b is kept unchanged, the curvature rho of the arc-shaped section is gradually increased along with the gradual reduction of the value of the parameter a, the light emitting efficiency is continuously increased, and the saturation uniformity of the light brightness in the reflection cavity is increased.

Claims

1. The utility model provides a non-direct-projection classroom lamp, includes lamp shade (1) and sets up light-passing board (2) in lamp shade (1) bottom, be formed with reflection chamber (3) between lamp shade (1) and light-passing board (2), all be provided with LED lamp plate (31) at the both ends that are located light-passing board (2) width direction in reflection chamber (3), the length direction of lamp shade (1) is followed in LED lamp plate (31) extends its characterized in that: the bottom of light-passing board (2) is provided with grid (4), lamp shade (1) is formed with reflection of light face (11) on the top surface towards light-passing board (2) one side, reflection of light face (11) facing is equipped with first reflective membrane (5), light emitting area (310) top-down of LED lamp plate (31) is gradually to reflecting chamber (3) inner slope, just light emitting area (310) orientation reflection of light face (11) are arranged.

2. The non-direct classroom lamp as defined in claim 1, wherein: the first reflective film (5) comprises a first back adhesive (51), a first film substrate (52) and a first high-reflection coating (53) which are sequentially arranged from top to bottom, and the first back adhesive (51) is attached to the reflective surface (11).

3. The non-direct classroom lamp as defined in claim 2, wherein: the vertical section of the light reflecting surface (11) is an arc section with a downward concave surface, and the curvature of the arc section

Wherein x and y are the abscissa and the ordinate of any point on the arc-shaped section, the value range of the parameter a is 120-150 mm, and the value range of the parameter b is 50-80 mm.

4. The non-direct classroom lamp as defined in claim 3, wherein: the value of the parameter a is 120mm, and the value of the parameter b is 70 mm.

5. The non-direct classroom lamp defined in any one of claims 1-4, wherein: reflection chamber (3) are interior all to be provided with radiator (32) in light-passing board (2) width direction's both sides, have on the top surface of radiator (32) and supply spacing groove (321) of LED lamp plate (31) installation.

6. The non-direct classroom lamp as defined in claim 5, wherein: the luminous surface (310) of LED lamp plate (31) is pasted and is equipped with second reflective membrane (6), offer opening (611) that luminous body (311) on supplying LED lamp plate (31) to pass on second reflective membrane (6).

7. The non-direct classroom lamp as defined in claim 6, wherein: the vertical cross section of second reflective membrane (6) is the V-arrangement, including pasting first rete (61) of establishing on LED lamp plate (31) and pasting second rete (62) of establishing on radiator (32), the inboard edge of the neighbouring lamp shade (1) of first rete (61).

8. The non-direct classroom lamp as defined in claim 7, wherein: first rete (61) and second rete (62) all include second gum (601), second membrane base (602) and second high-reflection coating (603) that arrange from bottom to top in proper order, second gum (601) subsides of first rete (61) are located on light emitting surface (310), second gum (601) subsides of second rete (62) are established on the corresponding position of radiator (32).

9. The non-direct classroom lamp as defined in claim 5, wherein: slots (322) for inserting the corresponding outer edges of the light transmission plates (2) are formed in the inner side walls of the two heat dissipation bodies (32).

10. The non-direct classroom lamp as defined in claim 9, wherein: the edge of the two sides of the lampshade (1) is provided with a folded edge (12) which is bent towards the interior of the reflection cavity (3), and an installation space (10) for accommodating the grating (4) is formed between the folded edge (12) and the lower surface of the heat dissipation body (32).