CN110822319A

CN110822319A - Flat lamp

Info

Publication number: CN110822319A
Application number: CN201910986958.5A
Authority: CN
Inventors: 周明杰; 张晓华
Original assignee: Oceans King Lighting Science and Technology Co Ltd; Oceans King Dongguan Lighting Technology Co Ltd; Shenzhen Oceans King Lighting Engineering Co Ltd
Current assignee: Oceans King Lighting Science and Technology Co Ltd; Oceans King Dongguan Lighting Technology Co Ltd; Shenzhen Oceans King Lighting Engineering Co Ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-02-21

Abstract

The utility model is suitable for the lighting technology field, the utility model provides a panel lamp, which comprises an outer shell, lamp source subassembly and light guide plate, the lamp source subassembly includes the lamp source board and locates the lamp pearl on the lamp source board, the shell includes the first casing and the second casing of mutual lock, be equipped with spacing muscle in the first casing, first side and second side have on the spacing muscle, first side forms the draw-in groove with an inboard wall of first casing, the lamp source board is located in the draw-in groove and spacing in first side, lamp source board side and locate the second side are located to the light guide plate, and the distance of second side to the inside wall is greater than the lamp pearl and keeps away from the distance of lamp source board one side to the inside wall, in order to prevent that light guide. Through set up spacing muscle in first casing, and form the draw-in groove between the inside wall of spacing muscle and first casing, the lamp source board is fixed in the draw-in groove, and the light guide plate is spacing in the second side, prevents that the light guide plate from touching or extrudeing the lamp pearl, and sets up spacing muscle on first casing, and the operation is very simple, reduce cost.

Description

Flat lamp

Technical Field

The invention belongs to the technical field of illumination, and particularly relates to a flat lamp.

Background

At present, the lighting lamp suitable for the square cabin generally adopts a flat lamp with a side light. The flat lamp generally comprises a lamp source plate and a light guide plate, wherein the lamp source plate is arranged on the side face of the light guide plate, and a lamp bead used for emitting light is arranged on the lamp source plate. Because the lamp pearl of lamp source board generally locates the side of light guide plate, when using, the easy touching of light guide plate or even extrusion lamp pearl leads to the lamp pearl to damage.

The existing flat lamp is damaged by extrusion in order to avoid lamp beads, and is generally soft spacing between the light guide plate and the lamp beads by arranging a rubber pad between the light guide plate and the lamp source plate, or an aluminum block is welded on the lamp source plate to be hard spacing so as to prevent the light guide plate from touching the lamp beads. And when the light guide plate is easy inflation after using longer time, then can drive rubber pad extrusion lamp pearl, though the setting of aluminium pig can avoid light guide plate touching lamp pearl, nevertheless weld the complexity that the aluminium pig can increase technology on the lamp source board, reduce the efficiency of production.

Disclosure of Invention

The invention aims to provide a flat lamp, and aims to solve the technical problem that in the prior art, lamp beads on a lamp source board are easily extruded and damaged on the side surface of a light guide plate.

In order to solve the above problems, an embodiment of the present invention provides a flat lamp, including a housing, a lamp source assembly, and a light guide plate, where the lamp source assembly includes a lamp source plate and a lamp bead disposed on the lamp source plate, the housing includes a first casing and a second casing that are fastened to each other, a limiting rib is disposed in the first casing, the limiting rib has a first side and a second side, the first side and an inner sidewall of the first casing form a slot, the lamp source plate is disposed in the slot and limited to the first side, the light guide plate is disposed beside the lamp source plate and disposed at the second side, and a distance from the second side to the inner sidewall is greater than a distance from a side of the lamp bead far from the lamp source plate to the inner sidewall, so as to prevent the light guide plate from touching the lamp bead.

Furthermore, the number of the lamp source plates is two, two opposite limiting ribs are arranged on the first shell, two clamping grooves are formed in the two limiting ribs and the two inner side walls of the first shell respectively, the two lamp source plates are arranged in the two clamping grooves respectively, and the light guide plate is arranged between the two lamp source plates.

Further, spacing muscle is located first casing on the inside wall, the lamp source board is fixed in on the inside wall, first side with the second side is adjacent to be set up, first side be circular-arc and with the inside wall forms the draw-in groove, the second side arrives the distance of inside wall is greater than the lamp pearl is kept away from one side of inside wall arrives the distance of inside wall.

Furthermore, two opposite ends of an inner side wall of the first shell are respectively provided with two limiting ribs, the two limiting ribs are respectively formed into the clamping grooves with the inner side wall of the first shell, and two ends of the lamp source plate are respectively arranged in the clamping grooves.

Furthermore, spacing muscle with the first casing the inside wall interval sets up, first side reaches the second side sets up relatively, the second side is to the distance of inside wall is greater than the lamp pearl is kept away from the lamp source board reaches the distance of inside wall.

Furthermore, a first step is arranged on one inner side wall of the first shell, the limiting ribs are arranged on the first step, and the light source plate is supported on the first step.

Furthermore, the first step is further provided with a limiting strip arranged at an interval with the limiting rib, the edge of the lamp source plate is provided with a limiting opening, and the limiting strip is limited in the limiting opening.

Further, the light guide plate with the butt has the buffer block between the lamp source board, the thickness of buffer block is greater than the thickness of lamp pearl.

Further, a second step is arranged in the first shell, and the light guide plate is arranged on the second step.

Furthermore, a diffusion plate and reflective paper are respectively arranged on two opposite sides of the light guide plate, the diffusion plate is arranged on the light emitting side of the light guide plate, a window is arranged on the second shell, and the diffusion plate is opposite to the window.

The flat lamp provided by the invention has the beneficial effects that: compared with the prior art, the light guide plate and the lamp beads are respectively limited on the second side and the first side of the limiting rib, the light guide plate is arranged on the second side, the distance from the second side to the inner side wall is larger than the distance from one side, far away from the light source plate, of the lamp beads to the inner side wall, gaps are reserved between the second side and the lamp beads, the light guide plate and the lamp beads are respectively limited on the second side and the first side of the limiting rib, the light guide plate is prevented from touching or extruding the lamp beads, the limiting rib is arranged on the first shell, operation is very simple, and cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in 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 based on these drawings without inventive exercise.

Fig. 1 is a perspective view of a flat lamp according to an embodiment of the present invention;

FIG. 2 is a partial perspective view of the flat panel lamp of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a perspective view of a first housing of the flat panel lamp of FIG. 1;

FIG. 5 is an enlarged view of a portion of FIG. 4;

fig. 6 is a sectional view of the flat lamp shown in fig. 1.

Wherein, in the figures, the respective reference numerals:

100-flat panel lamp; 1-a lamp source assembly; 2-a light guide plate; 3-a control component; 4-a housing; 5, a diffusion plate; 6-reflective paper; 7-a buffer pad; 11-a lamp source plate; 12-lamp beads; 13-a limiting port; 14-a buffer block; 31-a control circuit board; 32-a transfer switch; 33-an aviation socket; 34-a potentiometer; 41-a first housing; 42-a second housing; 43-a containment chamber; 44-an insulating pad; 45-limiting ribs; 46-a card slot; 47-a stop bar; 48-fixing the ear; 411 — first step; 412-a second step; 421-window.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 3, a flat lamp 100 according to an embodiment of the present invention is suitable for use in a cabin of a shelter, and includes a housing 4, a light source assembly 1, and a light guide plate 2.

Specifically, lamp source subassembly 1 includes lamp source board 11 and locates lamp pearl 12 on lamp source board 11, and shell 4 includes first casing 41 and the second casing 42 of mutual lock, is equipped with spacing muscle 45 in the first casing 41, has first side and second side on the spacing muscle 45, and first side and the inboard wall of first casing 41 form draw-in groove 46, and lamp pearl 12 is located on one side of lamp source board 11, and the opposite side butt of lamp source board 11 is in first inside wall. The lamp source plate 11 is clamped in the clamping groove 46 to fix the lamp source plate 11, i.e. the lamp source plate 11 is limited on the first side, and meanwhile, the lamp beads 12 on the lamp source plate 11 are limited on the first side. The light guide plate 2 is arranged at the side of the lamp source plate 11 and on the second side of the limiting rib 45, the thickness of the limiting rib 45 is larger than the distance between the lamp bead 12 and the lamp source plate 11, and even if the lamp source plate 11 and the light guide plate 2 are respectively abutted against the first side and the second side, the light guide plate 2 can be prevented from touching the lamp bead 12. The setting of spacing muscle 45 not only realizes the fixed of lamp source board 11, still can make light guide plate 2 and lamp pearl 12 spacing respectively in the both sides of spacing muscle 45 simultaneously, even light guide plate 2 is using long-time back and expand, also can be spacing in the second side of spacing muscle 45, avoids the touching of light guide plate 2 extrusion even in order to destroy lamp pearl 12, improves the life of lamp pearl 12.

In the embodiment of the invention, the limiting rib 45 is arranged in the first shell 41, the limiting rib 45 is provided with a first side and a second side which are opposite, a clamping groove 46 is formed between the first side and one inner side wall of the first shell 41, the lamp source plate 11 is fixed in the clamping groove 46 and limited on the first side of the limiting rib 45, the light guide plate 2 is arranged on the second side, the thickness of the limiting rib 45 is larger than the distance between the lamp bead 12 and the lamp source plate 11, a gap is always reserved between the second side and the lamp bead 12, so that the light guide plate 2 and the lamp bead 12 are respectively limited on the two opposite sides of the limiting rib 45, the light guide plate 2 is prevented from touching or extruding the lamp bead 12, and the limiting rib 45 is arranged on the first shell 41, so that the operation is.

Specifically, in the present embodiment, the flat lamp 100 is mounted on the top of the cabin, the first housing 41 is an upper case, and the second housing 42 is a lower case, and the upper case is in contact with and fixed on the top of the cabin. Of course, the positions of the first housing 41 and the second housing 42 are not limited to the specific ones. Specifically, a plurality of fixing lugs 48 are distributed on the periphery of the first housing 41 for fixing the whole flat lamp 100 on the cabin top of the shelter.

Specifically, in this embodiment, can be integrated into one piece setting between spacing muscle 45 and the first casing 41, first casing 41 is the plastic material, and spacing muscle 45 can reduce the processing degree of difficulty of spacing muscle 45 with first casing 41 so, improves its shaping production efficiency, still can reduce cost simultaneously, and the structure is still simple relatively, is applicable to the volume production.

Specifically, one side of the lamp source plate 11 departing from the lamp bead 12 is pasted with a heat conducting glue (not shown), and the heat conducting glue is abutted on the lamp source plate 11 and the first inner side wall, so that heat on the lamp source plate 11 can be guided conveniently.

Specifically, referring to fig. 3, in the present embodiment, an accommodating cavity 43 is formed in the first housing 41, the light source assembly 1 and the light guide plate 2 are both disposed in the accommodating cavity 43, and the limiting rib 45 is disposed in the accommodating cavity 43.

Further, referring to fig. 2 and 4, in the present embodiment, the number of the light source plates 11 is two, and the two light source plates 11 are respectively disposed at two opposite ends of the light guide plate 2, so as to enhance the illumination brightness of the flat lamp 100.

Specifically, the first housing 41 is provided with two opposite limiting ribs 45, the two limiting ribs 45 are respectively formed between two opposite inner side walls of the first housing 41, and the two lamp source plates 11 are respectively disposed in the two clamping grooves 46, so that the light guide plate 2 is disposed between the two lamp source plates 11.

Preferably, referring to fig. 3, in the present embodiment, the limiting rib 45 is disposed on an inner side wall of the first casing 41, and the slot 46 is formed between the limiting rib and the inner side wall, wherein the lamp source plate 11 is clamped in the slot 46 and fixed on the inner side wall. Wherein, first side and the adjacent setting in second side, first side are circular-arc and form draw-in groove 46 with the inboard wall to make lamp pearl 12 spacing in first side, and one side that spacing muscle 45 deviates from this inside wall is the second side, and the distance of second side to this inside wall is greater than the distance that lamp pearl 12 deviates from one side of lamp source board 11 and this inside wall, even make and leave the clearance between light guide plate 2 and the lamp pearl 12, avoid lamp pearl 12 to be damaged.

Specifically, in this embodiment, the thickness of the limiting rib 45 can be larger than the distance between the lamp bead and the inner side wall of the first casing 41, that is, the lamp bead 12 is fixed on the inner side wall of the first casing 41, even if the light guide plate 2 drops to enable one end of the light guide plate to abut against the second side, a gap is always reserved between the lamp bead 12 and the second side of the limiting rib 45, and therefore the light guide plate 2 on the second side can be prevented from touching or even extruding the lamp bead 12.

The lamp source plate 11 is fixed to an inner sidewall of the first housing 41 by welding, and the fixing manner is not limited herein.

Further, referring to fig. 4, in the present embodiment, two limiting ribs 45 are respectively disposed at two opposite ends of an inner side wall of the first casing 41, the two limiting ribs 45 and the inner side wall both form a slot 46, and two ends of the lamp source plate 11 are respectively disposed in the two slots, so as to enhance the balance and fixation of the lamp source plate 11.

Optionally, in this other embodiment, the limiting rib 45 is disposed in the first casing 41 and spaced apart from an inner side wall of the first casing 41, and the first side and the second side are disposed oppositely, so that a distance between the second side and the inner side wall is greater than a distance between one side of the lamp bead 12 departing from the lamp source plate 11 and the inner side wall.

Specifically, the distance between the first side and the second side can be larger than the distance between the lamp bead 12 and the lamp source plate 11, even if the lamp source plate 11 drops and abuts against the first side of the limiting rib 45 in the working process, and the light guide plate 2 abuts against the second side, a gap still exists between the lamp bead 12 and the light guide plate 2 at the moment, and the protection of the lamp bead 12 can still be realized.

Further, referring to fig. 4 and fig. 5, in this embodiment, a first step 411 is further disposed on the first inner sidewall, the limiting rib 45 is disposed on the first step 411, and the light source board 11 is supported on the first step 411 and is clamped in the clamping groove 46.

Further, referring to fig. 5, in this embodiment, the first step 411 is further provided with a limiting strip 47 spaced from the limiting rib 45, the edge of the lamp source plate 11 is provided with a limiting opening 13, and when the lamp source plate 11 is clamped in the clamping groove 46, the limiting strip 47 is inserted into the limiting opening 13 to prevent the lamp source plate 11 from shaking.

Specifically, in this embodiment, the two opposite inner side walls of the first housing 41 are respectively provided with a limiting strip 47, so that the limiting function of the two lamp source plates 11 can be realized.

Further, please refer to fig. 3, in this embodiment, a buffer block 14 is abutted between one end of the light guide plate 2 and the lamp source plate 11, the buffer block 14 is attached to one side of the lamp source plate 11 and is spaced from the lamp bead 12, a compression space is provided between one end of the light guide plate 2 and the lamp source plate 11, and the thickness of the buffer block 14 is greater than that of the lamp bead 12, so as to realize soft limit for the lamp bead 12, and prevent the light guide plate 2 from touching and even squeezing the lamp bead 12. In this embodiment, through the setting of spacing muscle 45 and buffer block 14, realize the dual spacing between light guide plate 2 and the lamp pearl 12, prevent that light guide plate 2 from touching even extrusion lamp pearl 12, realize the protection to lamp pearl 12, prolong the life of lamp pearl 12.

In this embodiment, the buffer blocks 14 may be disposed in a plurality of numbers, and the buffer blocks 14 are uniformly distributed on one side of the light source plate 11, so that the contact between the light source plate 11 and the light guide plate 2 can be more balanced.

In this embodiment, the buffer block 14 is provided as a rubber block, and of course, the material of the buffer block 14 is not limited herein.

In this embodiment, the light source plates 11 are set to two, and one side of the two light source plates 11 close to the light guide plate 2 is provided with the buffer block 14, so that the two opposite ends of the light guide plate 2 can be respectively abutted against the buffer block 14 on the two light source plates 11, and the light guide plate 2 is elastically fixed between the two light source plates 11, thereby fixing the light guide plate 2 and facilitating the assembly and disassembly of the light guide plate.

Further, referring to fig. 4 and fig. 5, in the present embodiment, a second step 412 is disposed in the first housing 41, the second step 412 is disposed at an interval with the limiting rib 45, and the light guide plate 2 is disposed on the second step 412 and limited at a second side of the limiting rib 45.

Further, referring to fig. 6, in the embodiment, two opposite sides of the light guide plate 2 are respectively provided with a diffusion plate 5 and a reflective paper 6, the diffusion plate 5 is disposed on the light emitting side of the light guide plate 21, light emitted by the lamp beads 12 of the light source boards 11 at two ends of the light guide plate 21 is guided into the light guide plate 21 and diffused out through the diffusion plate 5, so as to realize the illumination function, and the arrangement of the reflective paper 6 can improve the utilization rate of the light.

In this embodiment, diffuser plate 5's two sides all is through dull polish processing, and light can realize the effect of diffuse transmission when diffusing away from diffuser plate 5, can effectively reduce the glare simultaneously, improves the degree of consistency of light luminance.

Specifically, referring to fig. 6, in the present embodiment, the second casing 42 is provided with a window 421, the diffusion plate 5 faces the cover window 421, and the light diffused from the diffusion plate 5 can directly pass through the window 421, so as to implement the illumination function.

Further, in this embodiment, the lamp beads 12 include white lamp beads 12 and colored lamp beads 12, and the lamp beads 12 on the two lamp source plates 11 face the two opposite ends of the light guide plate 2, so that the light emitted from the white lamp beads 12 and the colored lamp beads 12 can be guided into the guide plate 2.

Referring to fig. 1 and fig. 2, the flat lamp 100 further includes a control component 3, the control component 3 includes a control circuit board 31 disposed in the first housing 41 and electrically connected to the lamp source board 11, and a switch 32 disposed on the control circuit board 31, the switch 32 can control the control circuit board 31 to switch on the white light beads 12 or the colored light beads 12, respectively, so that a user in the shelter can switch the white light or the colored light of the shelter lamp according to actual use conditions, thereby playing a role of air defense warning in the shelter.

Wherein, white lamp pearl 12 and colored lamp pearl 12 all set up to a plurality ofly, equally divide a plurality of white lamp pearls 12 and colored lamp pearl 12 of cloth on each lamp source board 11, and white lamp pearl 12 and colored lamp pearl 12 evenly distributed are in 11 one sides of lamp source board to make no matter make white light or colorama all can evenly leading-in to light guide plate 2 in, strengthen the degree of consistency of light ground. Here, the colored light bead 12 can be set to be red, blue or green which is commonly used in air defense warning, and here, the specific color of the colored light bead 12 is not limited uniquely. The switch 32 is controllable to switch the white light and the colored light of the lamp bead 12.

Specifically, referring to fig. 6, in the embodiment, a buffer 7 is disposed between the control circuit board 31 and the reflective paper 6, and the buffer 7 abuts against the second step 412 to provide a compression space between the control circuit board 31 and the reflective sheet to prevent the control circuit board 31 from being squeezed. An insulating pad 44 is disposed between the control circuit board 31 and the inner wall of the first housing 41.

Specifically, referring to fig. 4, in this embodiment, the first housing 41 is further provided with an aviation socket 33 and a potentiometer 34, which are disposed with the switch 32, and the potentiometer 34 is electrically connected to the control circuit board 31 and can be used for adjusting to change the current of the lamp bead 12, so as to adjust the illumination brightness of the lamp source assembly 1, so that the shelter lamp can meet various illumination requirements.

Specifically, in this embodiment, the lamp beads 12 are LED lamp beads 12, and certainly, the type of the lamp beads 12 is not limited uniquely here.

Wherein, aviation socket 33 electricity is connected in control circuit board 31, and can be used to connect external equipment electrically to control circuit board 31 transmits external information in order to control lamp pearl 12.

In this embodiment, the external device can be set up to the sensor, thereby can respond to peripheral environment and give control circuit board 31 transmission information, thereby control circuit board 31 can automatic control lamp pearl 12 according to the information of its transmission and send white light or colorama to realize the effect of air defense warning. For example, the sensor is a temperature sensor, and can sense the temperature of the external environment and transmit temperature information to the control circuit board 31 to control the switching of the white light and the colored light, and of course, the sensor can also sense the external brightness change, so that the control circuit board 31 automatically controls and adjusts the display brightness of the lamp beads 12. The information transmitted by the external device to the control circuit board 31 through the aviation socket 33 is not limited to the specific information.

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 invention, 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. The utility model provides a panel lamp, its characterized in that, includes shell, lamp source subassembly and light guide plate, the lamp source subassembly includes the lamp source board and locates lamp pearl on the lamp source board, the shell includes first casing and the second casing of mutual lock, be equipped with spacing muscle in the first casing, first side and second side have on the spacing muscle, first side with an inboard wall of first casing forms the draw-in groove, the lamp source board is located in the draw-in groove and spacing in first side, the light guide plate is located lamp source board side is located the second side, just the second side arrives the distance of inside wall is greater than the lamp pearl is kept away from one side of lamp source board arrives the distance of inside wall, in order to prevent the light guide plate touching the lamp pearl.

2. The flat lamp according to claim 1, wherein the number of the lamp source plates is two, the first housing has two opposing limiting ribs, the two limiting ribs respectively form two slots with the two inner sidewalls of the first housing, the two lamp source plates are respectively disposed in the two slots, and the light guide plate is disposed between the two lamp source plates.

3. The flat lamp according to claim 1, wherein the limiting rib is disposed on the inner sidewall of the first housing, the lamp source plate is fixed on the inner sidewall, the first side is disposed adjacent to the second side, the first side has an arc shape and forms the slot with the inner sidewall, and a distance from the second side to the inner sidewall is greater than a distance from a side of the lamp bead away from the inner sidewall to the inner sidewall.

4. The flat lamp as claimed in claim 3, wherein two of said limiting ribs are respectively disposed at two opposite ends of said inner sidewall of said first housing, said two limiting ribs respectively form said slots with said inner sidewall, and two ends of said lamp source plate are respectively disposed in said slots.

5. The flat lamp of claim 1, wherein the limiting rib is spaced apart from the inner side wall of the first housing, the first side and the second side are disposed opposite to each other, and a distance from the second side to the inner side wall is greater than a distance from the lamp bead to the inner side wall when the lamp bead is away from the lamp source plate.

6. The flat lamp of claim 1, wherein a first step is disposed on the inner sidewall of the first housing, the limiting rib is disposed on the first step, and the lamp source plate is supported on the first step.

7. The flat lamp as claimed in claim 6, wherein the first step further comprises a position-limiting strip spaced apart from the position-limiting rib, the edge of the lamp source plate is provided with a position-limiting opening, and the position-limiting strip is positioned in the position-limiting opening.

8. The flat lamp according to claim 1, wherein a buffer block is abutted between the light guide plate and the lamp source plate, and the thickness of the buffer block is greater than that of the lamp bead.

9. A flat panel lamp as claimed in claim 1, wherein a second step is provided in the first housing, and the light guide plate is provided on the second step.

10. A flat panel lamp as claimed in any one of claims 1 to 9, wherein a diffuser plate and a reflective paper are provided on opposite sides of the light guide plate, respectively, the diffuser plate being provided on the light exit side of the light guide plate, and a window being provided on the second housing, the diffuser plate facing the window.