CN216202729U

CN216202729U - Blackboard lamp

Info

Publication number: CN216202729U
Application number: CN202121109277.XU
Authority: CN
Inventors: 方翔; 洪建顺; 陈云伟; 赵毅
Original assignee: Leeleds Lighting Xiamen Co Ltd
Current assignee: Leeleds Lighting Xiamen Co Ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-04-05
Anticipated expiration: 2031-05-21

Abstract

The utility model provides a blackboard lamp, which comprises a lamp body, a light source, a light homogenizing sheet and a light guide assembly, wherein the lamp body is provided with a light source hole; the light source is arranged in the lamp body; the light guide assembly is arranged on the light emitting side of the light source; the light homogenizing sheet is attached to the light incident side of the light guide assembly, and a serrated groove body is formed in the light incident side of the light homogenizing sheet. The blackboard lamp provided by the utility model can reduce glare projected on a blackboard, reduce the projection angle of light and improve the utilization rate of the light.

Description

Blackboard lamp

Technical Field

The utility model belongs to the technical field of illumination, and particularly relates to a blackboard lamp.

Background

The blackboard is used as a common teaching tool and is an important medium for transmitting information between teachers and students. When indoor light is not enough, the students cannot see the content on the blackboard clearly, normal teaching is influenced, and the blackboard lamp needs to be arranged indoors to increase the brightness of light on the blackboard. The existing blackboard lamp usually adopts a reflecting cover or a lens to collect and convert light rays emitted by a light source, so that the emitted light rays can be intensively and uniformly irradiated on a writing area of a blackboard. However, the light is collected and converted by adopting the reflecting cover or the lens, so that the luminous surface of the blackboard lamp is small, the light concentration is high, glare is easily generated on the blackboard, and the teaching quality is influenced. If light is converted through the light guide plate, glare can be reduced, but the low light uniformity and the incomplete projection of light on the blackboard are easily caused, and the light energy utilization rate is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a blackboard lamp, which aims to reduce glare projected on a blackboard, reduce the projection angle of light and improve the utilization rate of the light.

In order to achieve the purpose, the utility model adopts the technical scheme that: provided is a blackboard lamp including: further comprising:

a lamp body;

the light source is arranged in the lamp body;

the light guide assembly is arranged on the light emitting side of the light source; and

and the light homogenizing sheet is attached to the light incident side of the light guide assembly, and the light incident side of the light homogenizing sheet is provided with a serrated groove body.

In a possible implementation manner, the side wall of the groove body is a plane or a concave cambered surface.

In one possible implementation, the light guide assembly includes:

a polarizing plate having a side portion disposed corresponding to the light source; and

and the reflecting sheet is attached to one side of the polarizing plate, which is opposite to the light emergent side.

In one possible implementation manner, the light homogenizing sheet is attached to the light incident side of the polarizing plate.

In one possible implementation, the lamp body includes:

the fixed shell is used for fixing the light source, the light homogenizing sheet and the light guide assembly;

the driving assembly is arranged outside the fixed shell and is electrically connected with the light source; and

and the mounting assembly is arranged on one side of the fixed shell, which is back to the light-emitting direction of the light source.

In one possible implementation, the fixing case includes:

the heat dissipation cover is used for fixing the light source, the light homogenizing sheet and the light guide assembly; and

and the two end covers are respectively covered at the two ends of the heat dissipation cover.

In a possible implementation manner, a first accommodating groove for accommodating the light source and a second accommodating groove for respectively clamping the two opposite side edges of the light guide assembly are formed in the heat dissipation cover.

In one possible implementation, the heat dissipation cover includes:

the cover body is provided with a light outlet corresponding to the light outlet side of the light guide component;

the first fixing shell is arranged at the light outlet and is abutted against one side of the light outlet surface of the light guide assembly; and

the second fixed shell is arranged at the light outlet and is abutted against the other side of the light-emitting surface of the light guide assembly;

the first fixing shell and the cover body are enclosed to form the first accommodating groove and one of the second accommodating grooves, and the second fixing shell and the cover body are enclosed to form the other second accommodating groove.

In a possible implementation mode, the heat dissipation cover is provided with a mounting groove, the blackboard lamp further comprises an elastic block arranged in the mounting groove, and the elastic block is used for abutting against one side of the light guide assembly away from the light incident side.

In one possible implementation, the drive assembly includes:

the mounting frame is arranged outside the fixed shell; and

and the driver is fixed on the mounting frame and is electrically connected with the light source.

The blackboard lamp provided by the utility model has the beneficial effects that: compared with the prior art, the light homogenizing sheet is arranged on the light emitting side of the light source, the zigzag groove bodies on the light homogenizing sheet can reduce the projection angle of light, the projection path of the light in the light guide assembly is prolonged, the light is projected outwards on one side far away from the light source after passing through the light guide assembly, the light emitted by the light source is concentrated in the blackboard area, and the light utilization rate is improved. The light guide assembly can adjust the projection direction of light, enlarge the projection area of light, enable the light to be uniformly irradiated in a blackboard area, and avoid glare.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a blackboard lamp according to a first embodiment of the present invention;

fig. 2 is an exploded view of a blackboard lamp according to a first embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of a blackboard lamp according to a first embodiment of the present invention;

FIG. 4 is an enlarged view of a portion A of FIG. 3;

fig. 5 is an exploded view of a lamp body used in one embodiment of the present invention;

FIG. 6 is a top view of a lamp body used in one embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;

FIG. 8 is a structural diagram of a light homogenizing sheet according to an embodiment of the present invention;

FIG. 9 is a structural diagram of a light homogenizing sheet according to a second embodiment of the present invention;

FIG. 10 shows (a) a light projection diagram with a light uniformizing sheet and (b) a light projection diagram without a light uniformizing sheet;

fig. 11 (a) and (b) are partially enlarged views of portions C and D in fig. 10, respectively.

In the figure: 1. a polarizing plate; 2. a light-reflecting sheet; 3. a second stationary case; 301. mounting grooves; 4. light homogenizing; 401. a trough body; 5. a cover body; 6. an end cap; 7. a first stationary case; 8. a light source; 9. mounting the component; 10. a mounting frame; 11. a driver; 12. an elastic block; 13. a first accommodating groove; 14. a second accommodating groove; 15. a blackboard.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It should be noted that "front" refers to a direction in which the light source 8 emits light, and "rear" refers to a direction away from the light source 8.

Referring to fig. 1 to 4 together, the blackboard lamp of the present invention will now be described. The blackboard lamp comprises a lamp body, a light source 8, a light homogenizing sheet 4 and a light guide assembly; the light source 8 is arranged in the lamp body; the light guide assembly is arranged on the light emitting side of the light source 8; the light homogenizing sheet 4 is attached to the light incident side of the light guide assembly, and a serrated groove body 401 is formed in the light incident side of the light homogenizing sheet 4.

Compared with the prior art, the light homogenizing sheet 4 is arranged on the light emitting side of the light source 8 of the blackboard lamp, the zigzag groove body 401 on the light homogenizing sheet 4 can reduce the projection angle of light, the projection path of the light in the light guide assembly is prolonged, the light is projected outwards on one side far away from the light source 8 after passing through the light guide assembly, the light emitted by the light source 8 is concentrated in the area of the blackboard 15, and the light utilization rate is improved. The light guide assembly can adjust the projection direction of light, enlarge the projection area of light, enable the light to be uniformly irradiated on the blackboard 15, and avoid glare.

Specifically, referring to fig. 10 to 11, arrows indicate the projection paths of the light rays. The angle of the light entering the light guide assembly after passing through the light homogenizing sheet 4 is reduced, and the light is prevented from being projected to the area outside the blackboard 15. Tests show that the uniformity of the blackboard lamp provided with the uniform light sheet 4 is more than or equal to 0.86, and the uniformity of the blackboard lamp without the uniform light sheet 4 is 0.78-0.83.

Specifically, the light source 8 includes an LED light source plate and an aluminum substrate, and the aluminum substrate is favorable for heat dissipation of the LED light source plate.

Alternatively, the light homogenizing sheet 4 may use PET, PC, PMMA, PS, or transparent glass as a substrate, and then a serrated groove 401 is formed on the surface by means of UV transfer printing.

In some embodiments, referring to fig. 8 to 9, the side wall of the trough 401 is a plane or a concave arc.

Light that 8 launches of light source in this embodiment throws on even light 4, takes place the refraction behind the cell body 401 of cockscomb structure, the lateral wall of cell body 401 is plane or sunken cambered surface homoenergetic and has reduced the projection angle of light, increased the projection distance of light in light guide component, make light can outwards throw in the one end that light guide component kept away from 8, avoid light to throw in the regional outside of blackboard, improved light utilization ratio.

In some embodiments, referring to fig. 1 to 4, the light guide assembly includes a polarizer 1 and a reflector 2, wherein a side of the polarizer 1 is disposed corresponding to the light source 8; the reflecting sheet 2 is attached to the side of the polarizing plate 1 opposite to the light exit side.

Light gets into in the polarizing plate 1 from the income light side of polarizing plate 1 to take place the refraction when getting into polarizing plate 1, reduced the projection angle of light, reflector panel 2 reflects light, makes light outwards throw from one side of polarizing plate 1, has improved the concentration and the utilization ratio of light.

In some embodiments, referring to fig. 2 to 4, the light-homogenizing sheet 4 is attached to the light-incident side of the polarizer 1.

The light homogenizing sheet 4 is attached to the light incident side of the polarizing plate 1, and the light homogenizing sheet 4 is fixed conveniently. Meanwhile, light directly enters the polarizing plate 1 after passing through the light homogenizing sheet 4, so that the light is prevented from being scattered outwards to influence the illumination effect.

Optionally, the light-homogenizing sheet 4 is adhered to the polarizer 1 by using a transparent optical adhesive. The glue can be coated and fixed locally or coated and fixed on the light homogenizing sheet 4 completely.

Alternatively, the light uniformizing sheet 4 may be fixed to the polarizing plate 1 by a screw connector or other mechanical structure.

Alternatively, the light homogenizing sheet 4 may be press-molded with the polarizing plate 1.

In some embodiments, referring to fig. 1 to 4, the lamp body includes a fixing shell, a driving component and a mounting component 9, the fixing shell is used for fixing the light source 8, the light homogenizing sheet 4 and the light guide component; the driving component is arranged outside the fixed shell and is electrically connected with the light source 8; the mounting component 9 is arranged on one side of the fixed shell, which is back to the light-emitting direction of the light source 8.

The light source 8, the dodging sheet 4 and the light guide assembly are respectively arranged inside the fixed shell, so that the damage to the fixed shell caused by the external environment can be avoided. The driving assembly is arranged outside the fixed shell, so that the inner space of the fixed shell is reduced, and the structure of the fixed shell is simpler. The driving assembly can control the light source 8 to be turned on or off, and is arranged outside the fixed shell to facilitate operation. The mounting assembly 9 can connect the fixing shell with an external working surface, and is convenient to mount.

In some embodiments, referring to fig. 1 to 7, the fixing housing includes a heat dissipation cover and two end caps 6, the heat dissipation cover is used for fixing the light source 8, the light uniformizing sheet 4 and the light guide assembly; two end covers 6 are respectively covered at two ends of the heat dissipation cover.

The end covers 6 seal the two ends of the heat dissipation cover, and prevent the light source 8, the light homogenizing sheet 4 or the light guide assembly from sliding out of the two ends of the fixed shell.

In some embodiments, referring to fig. 1 to 4, a first receiving groove 13 for receiving the light source 8 and a second receiving groove 14 for being respectively clamped with two opposite side edges of the light guide assembly are formed in the heat dissipation cover.

Light source 8 inserts and establishes in first holding tank 13, need not to fix light source 8 through other connecting pieces, avoids drilling on light source 8 to cause light source 8 to damage. Insert respectively in two second holding tanks 14 in light guide assembly's the front and back both sides, then make the lateral wall and the light guide assembly joint of second holding tank 14 through end cover 6 to fix light guide assembly, influence the projection distance of light when avoiding adopting bonding or other connecting pieces to light guide assembly fixed, improved the utilization ratio of light. This simple structure has avoided adopting too much connecting piece to connect and has caused the part to lose easily.

Optionally, the light homogenizing sheet 4 is connected to the light incident side of the light guide assembly, and then inserted into the second accommodating groove 14 together with the light guide assembly.

In some embodiments, referring to fig. 5 to 7, the heat dissipation cover includes a cover body 5, a first fixing case 7 and a second fixing case 3; the cover body 5 is provided with a light outlet corresponding to the light outlet side of the light guide component; the first fixed shell 7 is arranged at the light outlet and is abutted against one side of the light outlet surface of the light guide assembly; the second fixed shell 3 is arranged at the light outlet and is abutted against the other side of the light outlet surface of the light guide assembly;

the first fixing shell 7 and the cover body 5 are enclosed to form a first accommodating groove 13 and one second accommodating groove 14, and the second fixing shell 3 and the cover body 5 are enclosed to form another second accommodating groove 14.

First stationary housing 7 and second stationary housing 3 respectively with cover 5 butt, and lie in the same one side of the cover body 5, insert first holding tank 13 and second holding tank 14 back respectively with light source 8 and leaded light subassembly, cover end cover 6 at both ends, it is fixed with cover body 5 with end cover 6 through threaded connection spare to it is fixed with cover body 5 respectively with first stationary housing 7 and second stationary housing 3, avoids light source 8 and leaded light subassembly to take place to remove.

Optionally, the second stationary housing 3 is also connected to the end cap 6 by a threaded connection.

In some embodiments, referring to fig. 5 to 7, the heat dissipation cover is provided with an installation groove 301, the blackboard lamp further includes an elastic block 12 disposed in the installation groove 301, and the elastic block 12 is used for abutting against a side of the light guide assembly away from the light incident side.

Elastic block 12 is placed and is kept away from one side butt of income light side with the leaded light subassembly in mounting groove 301, provides the support to the leaded light subassembly, avoids the direct rigid contact of taking place of cover that dispels the heat and leads to the fact wearing and tearing easily to the surface of leaded light subassembly with the leaded light subassembly.

Optionally, the elastic block 12 is a silicone member.

Optionally, the elastic block 12 is provided in plurality, and the plurality of elastic blocks 12 are arranged at intervals.

In some embodiments, referring to fig. 1 to 3 and fig. 5, the driving assembly includes a mounting bracket 10 and a driver 11, the mounting bracket 10 is disposed outside the fixing housing; the driver 11 is fixed to the mounting frame 10 and electrically connected to the light source 8.

Driver 11 installs on mounting bracket 10, then is connected with the set casing through mounting bracket 10, conveniently fixes driver 11, need not to drill on driver 11, avoids damaging driver 11.

Alternatively, the mounting bracket 10 is slidably connected to the fixed housing, and the mounting bracket 10 can slide along the long axis of the fixed housing to adjust the position of the driver 11.

Optionally, the two sides of the driver 11 are provided with insertion pieces, the mounting frame 10 is provided with insertion slots in insertion fit with the insertion pieces, and the insertion pieces are in insertion fit with the insertion slots to connect the driver 11 with the mounting frame 10.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. Blackboard lamp, its characterized in that includes:

a lamp body;

the light source is arranged in the lamp body;

2. The blackboard lamp according to claim 1, characterized in that the side wall of the slot body is a plane or a concave arc.

3. The blackboard light of claim 1, wherein the light guide assembly includes:

4. The blackboard lamp according to claim 3, wherein the light homogenizing sheet is attached to the light incident side of the polarizing plate.

5. The blackboard lamp according to claim 1, characterized in that the lamp body includes:

6. The blackboard lamp according to claim 5, characterized in that the fixed case includes:

7. The blackboard lamp according to claim 6, wherein a first receiving groove for receiving the light source and a second receiving groove for being respectively clamped with the two opposite side edges of the light guide assembly are formed in the heat dissipation cover.

8. The blackboard lamp according to claim 7, wherein the heat dissipation cover includes:

9. The blackboard lamp of claim 6, wherein the heat dissipation cover is provided with an installation groove, the blackboard lamp further comprises an elastic block arranged in the installation groove, and the elastic block is used for abutting against one side of the light guide assembly, which is far away from the light incident side.

10. The blackboard lamp according to claim 5, characterized in that the driving assembly comprises:

the mounting frame is arranged outside the fixed shell; and