CN215336161U - Direct type panel lamp - Google Patents

Abstract

The application discloses a direct type panel lamp which comprises a frame, a diffusion plate, a back plate and at least one lamp strip; the diffusion plate has a light-transmitting function and forms a light-emitting surface, and the edge of the diffusion plate is lapped on the frame; the back plate is of a housing-shaped structure made of metal plates through deformation, the edge area of the back plate is overlapped on the frame, the central area of the back plate is arched and is configured to be used for installing and fixing the light bar, the edge area is deformed into a convex rib extending along the side length direction of the back plate, the first convex rib where each edge of the back plate is located comprises a first extending section located at two ends and a second extending section located in the middle, and the height of the first extending section is higher than that of the second extending section along the height direction of the direct type panel lamp; this scheme is for prior art, protruding muscle all offsets with the edge of diffuser plate towards one side of diffuser plate, through the emergence deformation of first extension section to carry out reverse offset with the deformation that the backplate produced, can reduce the deformation volume of marginal area, avoid its pulling frame, make the frame take place deformation.

Description

Direct type panel lamp

Technical Field

The application relates to a panel light field especially relates to a straight following formula panel light.

Background

The LED panel lamp has the advantages of good illumination uniformity, soft and comfortable light, environment-friendly materials, low power consumption and the like, and is a popular indoor lighting lamp at present.

The basic structure of the panel lamp comprises a frame, a back plate, a diffusion plate, a driving power supply and a plurality of light-emitting assemblies, wherein the back plate is installed on the back face of the frame, the diffusion plate is installed on the front face of the frame, the light-emitting assemblies are arranged between the back plate and the diffusion plate and installed on the lower surface of the back plate, and the driving power supply is installed on one side, back to the lamp body assemblies, of the back plate. The light emitting component forms a uniform plane light emitting effect after passing through the diffusion plate with high light transmittance, and the driving power supply is used for driving the light emitting element.

When the panel light was installed on the fossil fragments of ceiling, because light-emitting component's weight direct action is on the backplate, the middle part that leads to the backplate can sink downwards, and the edge of backplate can the perk, can take place the marginal pulling frame deformation of backplate to make the frame form the warpage, cause the problem that the panel light can't be set level on fossil fragments.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present application provides a direct type panel lamp, including:

the LED lamp comprises at least one lamp strip and a light source, wherein the lamp strip comprises a substrate, LED lamp beads fixed on the substrate and lenses covered on the LED lamp beads;

the frame is formed by splicing a plurality of frame strips, and each frame strip is provided with a first mounting surface and a second mounting surface which are at different heights;

the diffusion plate has a light-transmitting function, forms a light-emitting surface, and is overlapped on the lower first mounting surface at the edge;

the back plate is of a housing-shaped structure which is made of a metal plate through deformation, the edge area of the back plate is overlapped on a second higher mounting surface, the central area is arched and is configured to mount and fix the light bar, the edge area is deformed into a convex rib extending along the side length direction of the back plate, and the convex rib abuts against the diffusion plate to enable the diffusion plate to be attached to the first mounting surface;

the first convex rib on each side of the back plate comprises first extension sections positioned at two ends and a second extension section positioned in the middle, and the height of the first extension section is higher than that of the second extension section along the height direction of the direct type panel lamp.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, two first ribs located on adjacent sides of the back plate are continuously arranged along the circumferential direction of the back plate.

Optionally, for the same rib, the first extension section is connected to the second extension section through an arc-shaped transition surface.

Optionally, the height of the first extension is H1, the height of the second extension is H2, and H1: h2 ═ (1.02-1.1): 1.

optionally, the central region of the back plate is raised to form a cavity for accommodating the light bar, the cavity comprises a flat bottom wall and an inclined side wall, and the bottom wall is provided with grooves for arranging the light bar in a criss-cross manner.

Optionally, the side wall is deformed into a step structure extending along the side length direction of the back plate, and a first portion and a second portion are formed on two sides of the step structure.

Optionally, the first portion is located between the diffuser plate and the step structure, and the second portion is located between the step structure and the bottom wall;

the included angle between the first portion and the light emitting surface is larger than the included angle between the second portion and the light emitting surface.

Optionally, the step structure is adjacent to the bottom wall.

Optionally, the cross section of each frame strip is of an L-shaped structure and comprises a horizontal portion and a vertical portion, the edge of the diffusion plate and the edge of the back plate are lapped on the horizontal portion, and the vertical portion surrounds a limiting space for shielding the mounting structure on the edge of the back plate.

Optionally, the thickness of the back plate is 0.1 mm-0.4 mm.

When straight following formula panel light in this application is under the mounted state, protruding muscle all offsets with the edge of diffuser plate towards one side of diffuser plate to make the diffuser plate paste and lean on first installation face, through the emergence deformation of first extension, with reverse offset the deformation that the backplate produced, can reduce marginal area's deformation volume, avoid its pulling frame, make the frame take place deformation, and then make straight following formula panel light and fossil fragments contact on the ceiling apply ointment or plaster, the gap can not appear.

Drawings

Fig. 1 is a schematic structural diagram of a direct type panel lamp according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a direct type panel lamp according to an embodiment of the present disclosure;

FIG. 3 is an exploded view of the direct type panel lamp of FIG. 1;

FIG. 4 is a partial structural view of the direct type panel lamp of FIG. 1;

FIG. 5 is a schematic diagram of the power line of FIG. 4;

FIG. 6 is a partial schematic view of the direct type panel lamp of FIG. 1;

FIG. 7 is a schematic structural view of the LED lamp bead and the lens in FIG. 3;

FIG. 8 is a schematic structural diagram of the circuit board of FIG. 3;

FIG. 9 is a schematic diagram of a conductive strip structure in FIG. 3;

FIG. 10 is a partial structural view of the frame strip of FIG. 1 with one side omitted;

FIG. 11 is a schematic view of the frame strip of FIG. 10;

FIG. 12 is a schematic structural diagram of the back plate of FIG. 3;

fig. 13 is a partial structural view of the back plate in fig. 3.

The reference numerals in the figures are illustrated as follows:

100. a direct type panel lamp; 101. a light-emitting surface;

10. a light bar; 11. a substrate; 111. a first metal layer; 112. a first insulating layer; 113. a first circuit layer; 114. a second window; 12. LED lamp beads; 13. a lens; 131. a convex foot; 14. a conductive strip; 141. a second insulating layer; 142. a second circuit layer; 143. a second solder resist layer; 144. a first window;

20. a back plate; 21. a central region; 211. a bottom wall; 212. a protrusion; 213. recessing; 22. an edge region; 221. a side wall; 222. a rib is protruded; 223. an annular step; 224. a first portion; 225. a second portion; 23. a cavity; 24. a wire passing hole; 241. a card slot; 242. a first hole; 243. a second hole; 25. a first extension section; 26. a second extension section;

30. a diffusion plate;

40. a frame; 41. a frame strip; 42. a first mounting surface; 43. a second mounting surface; 44. a horizontal portion; 45. a vertical portion; 46. thickening the portion; 47. vertically folding; 471. a screw slot;

50. a power line; 51. a wire; 52. a protective sleeve; 53. a connector; 531. a mating surface; 532. a limiting member; 533. snapping; 534. a hook-like structure; 535. a guide surface;

60. and driving the cartridge.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, the present application provides a direct type panel lamp 100, which includes a frame 40, a back plate 20, a diffusion plate 30, a driving power source and at least one light bar 10, wherein the back plate 20 is installed on a back surface of the frame 40, the diffusion plate 30 is installed on a front surface of the frame 40, the light bar 10 is disposed between the back plate 20 and the diffusion plate 30 and installed on a lower surface of the back plate 20, and the driving power source is installed on a back surface of the direct type panel lamp 100 and electrically connected to the light bar 10 through a power line 50.

The central area of the back plate 20 is bulged to form a cavity 23 for accommodating the light bars 10, the cavity 23 includes a flat bottom wall 211 and an inclined side wall 221, each light bar 10 is fixed on the bottom wall 211, the diffusion plate 30 is disposed opposite to the back plate 20 to close the cavity 23, the frame 40 is formed by splicing a plurality of (usually four) side frame strips 41, and each side frame strip 41 is connected to the diffusion plate 30 and the corresponding edge of the back plate 20.

Each lamp strip 10 is the strip structure and arranges in parallel, and single lamp strip 10 includes base plate 11 and a plurality of LED lamp pearl 12 of installing in base plate 11, and each LED lamp pearl 12 arranges along lamp strip 10 length direction in proper order, and LED lamp pearl 12 is the matrix distribution in backplate 20 inboard for light source evenly distributed. The light bar 10 further comprises a lens 13 covering the LED lamp beads 12, the diffusion plate 30 has a light transmission function, light emitted by the LED lamp beads 12 sequentially penetrates through the lens 13 and the diffusion plate 30, a plurality of LED point light sources form a uniform surface light source after the light is diffused, and a light emitting surface 101 is formed on the bottom surface of the diffusion plate 30.

From the standpoint of processing and heat dissipation, the backplate 20 is stamped from a sheet metal material (e.g., ST13) to form a domed housing-like structure that includes a central region 21 (e.g., including the bottom wall 211) and an edge region 22 (e.g., including the side walls 221) disposed at the periphery of the central region 21. The edge region 22 overlaps the side frame strip 41, and the light bar 10 is disposed on the lower surface of the central region 21. The side of the backplate 20 within the cavity 23 is coated with a light reflective coating. The light reflecting coating may be various metal paints including epoxy, UV resin, etc.

Direct type panel light 100 is under the user state, because lamp strip 10 sets up the lower surface at central zone 21, under the effect of gravity, central zone 21 of backplate 20 also can collapse down, leads to its corner part to upwarp, if the intensity of frame 40 is not enough, can pull frame 40 and take place to warp and warp. To solve the technical problem, in some embodiments, as shown in fig. 10 and 12, the edge region 22 of the back plate 20 is deformed by itself to form a rib 222 extending along the side length direction of the back plate 20, and the rib 222 can increase the supporting strength of the whole back plate 20, especially the structural strength of the edge region 22, so as to prevent the rib 40 from pulling the frame 40 to deform the frame 40, and further, the direct type panel light 100 is applied to the keel on the ceiling in a contact manner, and no gap is generated.

In some embodiments, to reduce the difficulty of machining the ribs 222, the edge region 22 is bent upon itself to form the ribs 222. The deformation is carried out by conventional processing methods such as mechanical punching. In order to reduce the weight of the back plate 20 itself, the thickness of the back plate 20 is 0.1mm to 0.4mm in some embodiments while satisfying the supporting strength of the back plate 20. Preferably, the thickness of the back plate 20 is 0.2 mm.

The rib 222 abuts against the edge of the diffuser plate 30 to make it close to the first mounting surface 42, and because the back plate 20 has a certain elasticity, when the rib 222 abuts against the diffuser plate 30, the rib 222 is elastically deformed, so that the rib 222 applies pressure to the diffuser plate 30, and the rib 222 and the first mounting surface 42 cooperate to clamp the edge of the diffuser plate 30, so as to prevent the edge of the diffuser plate 30 from being bent, thereby preventing the central portion of the diffuser plate 30 (the geometric center of the diffuser plate 30 or the geometric center close to the diffuser plate 30) from collapsing downward.

In order to further solve the problem that the deformation of the back plate 20 is often unavoidable, and the provision of the plurality of ribs 222 only alleviates the problem, as shown in fig. 13, the first ribs 222 on each side of the back plate 20 include first extending sections 25 at both ends and second extending sections 26 in the middle, and the height of the first extending section 25 is higher than that of the second extending section 26 in the height direction of the direct type panel light 100; in the installed state of the direct type panel light 100, the side of the rib 222 facing the diffuser 30 is abutted against the edge of the diffuser 30, so that the diffuser 30 is abutted against the first installation surface 42, and the deformation of the first extension section 25 is used to counteract the deformation of the back plate 20. In some embodiments, two first ribs 222 are continuously disposed along the circumference of the back plate 20 at the adjacent edges of the back plate 20. Wherein, for the same rib 222, the first extension 25 is connected with the second extension 26 through an arc transition surface.

In order to avoid a gap between the rib 222 and the diffusion plate 30 (e.g., caused by an excessively large height difference between the first extending section 25 and the second extending section 26) and to avoid the deformation of the back plate 20 from being reversely offset (e.g., caused by an excessively small height difference between the first extending section 25 and the second extending section 26) when the rib 222 abuts against the diffusion plate 30, in some embodiments, the height of the first extending section 25 is H1, the height of the second extending section 26 is H2, and H1 is satisfied: h2 ═ (1.02-1.1): 1. preferably, H1: h2 ═ 1.08: 1.

in this embodiment, the back plate 20 is subjected to secondary stamping, so that the side wall 221 is deformed into an annular step 223 extending along the side length direction of the back plate 20, and the first portion 224 and the second portion 225 are formed on both sides of the annular step 223, and the step structure 223 can further enhance the structural strength of the back plate 20, and prevent the back plate 20 from collapsing or deforming. The first portion 224, the annular step 223, and the second portion 225 are sequentially arranged from bottom to top in the thickness direction of the direct type panel lamp 100.

The first portion 224 is located between the diffusion plate 30 and the annular step 223, the second portion 225 is located between the annular step 223 and the bottom wall 211, and an included angle between the first portion 224 and the light exit surface 101 is larger than an included angle between the second portion 225 and the light exit surface 101, so that the light emission of the direct type panel lamp 100 can be improved, and the requirement of the thickness of the direct type panel lamp 100 can be reduced. In some embodiments, the direct type panel lamp 100 has a thickness of less than 30 mm.

In the specific arrangement of the side walls 221, referring to one embodiment, the side walls 221 gradually converge from one end facing the diffusion plate 30 to one end facing the bottom wall 211 toward the geometric center of the direct type panel lamp 100; the second portion 225 is closer to the geometric center of the direct type panel lamp 100 than the first portion 224. In some embodiments, the first portion 224 and the second portion 225 each engage the annular step 223 via an arcuate transition surface.

In the embodiment, an included angle between the first portion 224 and the light emitting surface 101 is a1, an included angle between the second portion 225 and the light emitting surface 101 is a2, and a 1: a2 ═ 1.2 to 1.6: 1. preferably, an included angle between the first portion 224 and the light emitting surface 101 is 70 degrees, and an included angle between the second portion 225 and the light emitting surface 101 is 50 degrees. Wherein the annular step 223 is adjacent the bottom wall 211. In the thickness direction of the direct type panel lamp 100, the height of the first portion 224 is L1, the height of the second portion 225 is L2, and L1: l2 ═ 8 to 12: 1.

the backboard 20 is provided with a wire passing hole 24, one end of the power wire 50 is connected with the driving power supply, and the other end of the power wire passes through the wire passing hole 24 and then is electrically connected with the lamp strip 10. During assembly and installation of the direct type panel light 100, the power line 50 exposed outside the direct type panel light 100 may be pulled, and the power line 50 may be separated from the light bar 10. In order to solve the technical problem, in the embodiment, as shown in fig. 4 to fig. 5, the power line 50 includes a protective sleeve 52 and a wire 51, the wire 51 is inserted into the protective sleeve 52 and electrically connected to the light bar 10 through the wire passing hole 24, the protective sleeve 52 has a connector 53, the connector 53 has at least one mating surface 531 which is attached to the outer side of the back plate 20, and the mating surface 531 is provided with a latch 533, and the latch 533 extends into the wire passing hole 24 to prevent the power line 50 from being separated from the back plate 20. The protective sleeve 52 relatively fixes the position of the power line 50 in the wire passing hole 24, so that when the power line 50 exposed outside the direct type panel lamp 100 is pulled, the wires 51 in the back plate 20 (in the cavity 23) are not pulled, thereby avoiding the problem that the wires 51 are separated from the light bar 10.

The connector 53 is located at an end of the protective sheath 52, and in order to enable the wire 51 to pass through the protective sheath 52 and the connector 53, referring to an embodiment, the protective sheath 52 has a first wire passing channel, the connector 53 has a second wire passing channel communicated with the first wire passing channel, and the wire 51 sequentially passes through the first wire passing channel and the second wire passing channel to be electrically connected to the light bar 10. In some embodiments, the protective sleeve 52 and the connector 53 are integrally formed and made of plastic.

In this embodiment, the lead 51 is fixed relative to the protective sleeve 52 and/or the connector 53. The lead 51 may be connected to the protective sheath 52 and the connector 53 by bonding or melting. Specifically, when the wire 51 passes through the first wire passing channel and the second wire passing channel, the first wire passing channel and the second wire passing channel are filled with bonding materials (glue), so that the wire 51 is fixed relative to the inner wall of the first wire passing channel and/or the inner wall of the second wire passing channel; alternatively, the lead 51 is passed through the first and second passages, and then the lead 51 is pinched by melting the protective sheath 52 and/or the connector 53.

In order to avoid the power line 50 affecting the thickness of the direct type panel light 100 (the thickness of the direct type panel light 100 is: the height of the direct type panel light 100 in the installation state), in one embodiment, the wire passing hole 24 is opened on the sidewall 221. The wire through hole 24 has a length direction and a width direction, the length direction and the width direction are perpendicular to each other, and the width direction of the wire through hole 24 is the same as the thickness direction of the direct type panel light 100.

In this embodiment, the number of the elastic buckles 533 is at least two, and the two elastic buckles 533 are respectively matched with two opposite sides of the wire through hole 24 along the length direction thereof to prevent the power wire 50 from being separated from the back plate 20. In the specific arrangement of the snap button 533, referring to one embodiment, the ends of the snap button 533 extending into the wire passing hole 24 are provided with hook structures 534, and the hook structures 534 cooperate with the mating surface 531 to be fixed to the back plate 20. In the process that the two elastic buckles 533 extend into the wire passing hole, the hook-shaped structures 534 abut against the inner wall of the wire passing hole 24, so that the ends of the two elastic buckles 533 move towards each other until the hook-shaped structures 534 of the two elastic buckles 533 are placed in the cavity 23, and at this time, the two elastic buckles 533 are reset and matched with the matching surface 531 to be fixed on the back plate 20. In order to avoid the hook structures 534 from affecting the appearance of the direct type panel lamp 100, in some embodiments, the hook structures 534 are hidden within the cavity 23.

In the embodiment, the engagement surface 531 of the connecting head 53 is provided with a limiting member 532, and the limiting member 532 cooperates with the wire passing hole 24 to limit the twisting of the power cord 50 and the rear panel 20. In some embodiments, the position-limiting member 532 is located between two snap buckles 533, and a gap for the wire 51 to pass through is formed between the two snap buckles 533, so that the wire 51 passes through the connector 53. In some embodiments, the limiting member 532 is provided with a positioning groove for matching with the conducting wire 51 to prevent the conducting wire 51 from moving in the gap.

In this embodiment, the two opposite sides of the wire through hole 24 along the width direction thereof are provided with clamping grooves 241 engaged with the limiting members 532. The limiting member 532 is block-shaped, and has two first sides along the width direction of the wire passing hole 24 and two second sides along the length direction of the wire passing hole 24, the two first sides respectively abut against the two sidewalls 221 of the slot 241 along the width direction of the wire passing hole 24, and the two second sides respectively abut against the two sidewalls 221 of the slot 241 along the length direction of the wire passing hole 24.

To facilitate the insertion of the limiting member 532 into the slot 241, in some embodiments, the limiting member 532 has a guiding surface 535, and the guiding surface 535 is used to guide the limiting member 532 to extend into the slot 241. In the present embodiment, the guide surfaces 535 are arranged in pairs at opposite sides of the limiting member 532 in the length direction of the wire passing hole 24. The guide surfaces 535 are both planar, and along the moving direction of the limiting member 532, the two guide surfaces 535 gradually get close from the connecting head 53 to the end of the limiting member 532 facing away from the connecting head 53.

Of course, in other embodiments, the wire passing hole 24 has a cross-shaped structure, and includes a first hole 242 and a second hole 243 that are connected to each other, and the extending direction of the first hole 242 is perpendicular to the extending direction of the second hole 243; the elastic buckle 533 extends into the first hole 242 to prevent the power cord 50 from being disengaged, and the limiting member 532 cooperates with the second hole 243 to limit the power cord 50 from twisting with the back plate 20.

In some embodiments, as shown in fig. 3 and fig. 6, all the light bars 10 are connected in parallel by a conductive strip 14, and the conductive strip 14 is connected to each light bar 10 by welding; the conductive strips 14 are pressed on all the light bars 10 and perpendicularly intersect with all the light bars 10. Wherein, each lamp strip 10 all is vertical interval arrangement, and conducting strip 14 all is horizontal arranging.

In order to realize the electrical connection between the conductive strips 14 and the light bar 10, the edge of the conductive strip 14 has a first window 144, the substrate 11 has a second window 114 at a position close to the conductive strip 14, and pads are disposed at the two windows, which are electrically connected by soldering.

The substrate 11 can be a metal substrate 11, preferably an aluminum substrate 11, or an FR-4 glass fiber board. In some embodiments, the substrate 11 is coated with white solder resist ink to improve light reflection efficiency. The substrate 11 may be fixed to the lower surface of the back plate 20 by screws, preferably by bonding with a thermally conductive adhesive.

As shown in fig. 7 to 9, in some embodiments, the substrate 11 includes a first metal layer 111, a first insulating layer 112 and a first circuit layer 113, and the LED lamp bead 12 is soldered on the first circuit layer 113. A pad for soldering the LED lamp bead 12 is generally disposed on the first circuit layer 113. In order to provide protection for the first circuit layer 113, the surface of the substrate 11 is coated with white solder resist ink to form a first solder resist layer, while leaving a window at the pad to expose the pad for soldering the LED lamp bead 12.

The lens 13 on the light bar 10 is mainly used for light diffusion, the lens 13 is fixed on the substrate 11 through epoxy glue or UV glue, for convenience of installation, the back of the lens 13 is provided with a convex foot 131, and the corresponding substrate 11 is provided with a positioning hole matched with the convex foot 131. The light spot projected on the diffusion plate 30 after passing through the lens 13 is circular, in order to make the light diffusion uniform, the light spot should be spread over the whole diffusion plate 30, the diameter D of the light spot is not less than the distance between two diagonal LED lamp beads 12, because the intensity of the light spot is large in the middle and small in the edge, the adjacent light spots have partial overlap, so that the light intensity of each position of the diffusion plate 30 is substantially uniform.

The conductive strip 14 is a strip structure including a second insulating layer 141, a second circuit layer 142, and a second solder resist layer 143, wherein the second insulating layer 141 is made of an insulating resin material, and the second solder resist layer 143 is formed of white solder resist ink coated on a surface thereof, so that a position where the conductive strip 14 is disposed also has a light reflecting function. To make the connection, the edge of the conductive strip 14 has a first window 144 without solder resist ink, the substrate 11 has a second window 114 without solder resist ink near the conductive strip 14, and the two openings are provided with solder pads, which are electrically connected by soldering.

To facilitate positioning of the light bar 10, in some embodiments, as shown in fig. 6, the back plate 20 has a matrix of recesses 213, and the light bar 10 is disposed between two rows of recesses 213. In order to facilitate the processing of the recess 213 on the back plate 20, the back plate 20 is stamped to form a plurality of protrusions 212 facing away from the cavity 23, the recesses 213 are formed between adjacent protrusions 212, the light bars 10 are arranged in parallel, therefore, the protrusions 212 should also be arranged in parallel, and the gaps between adjacent protrusions 212 are used for mounting the light bars 10, so that the light bars 10 are generally in a straight strip structure.

In the specific configuration of the side frame strip 41, referring to one embodiment, the side frame strip 41 is made of metal section (e.g. aluminum alloy), and the end portions of the adjacent side frame strips 41 are welded and fixed. Of course, the frame strips 41 may also be made of a polymer material by injection molding, and since the polymer material cannot be welded, corner pieces for connecting adjacent frame strips 41 are generally required to be disposed at corners of the frame 40, or the adjacent frame strips 41 are connected by lap joints, but compared with a welding process, the flatness of the frame 40 is poor.

In some embodiments, as shown in fig. 10 and 11, the cross section of the frame strip 41 is an L-shaped structure, and includes a horizontal portion 44 and a vertical portion 45, the edge of the diffuser plate 30 and the edge of the back plate 20 are overlapped on the horizontal portion 44, and the vertical portion 45 encloses a limited space for shielding the installation structure of the edge of the back plate 20, so as to achieve decoration and certain protection.

In order to increase the strength of the sectional material, according to one embodiment, the thickness of the inner side of the corner of the frame strip 41 is increased to form a thickened portion 46, so that a step structure is formed on the horizontal portion 44 to form a first mounting surface 42 and a second mounting surface 43 on the step structure and the horizontal portion 44, the edge of the diffuser plate 30 is overlapped on the lower first mounting surface 42, and the edge of the back plate 20 is overlapped on the upper second mounting surface 43 and is fixed by fastening screws. To save material, in some embodiments, thickened portion 46 is a hollow structure.

In some embodiments, the edge of the back plate 20 is fixed to the frame 40 by fastening screws, and the frame strip 41 is provided with screw grooves 471 arranged along the length direction thereof. In some embodiments, the middle portion of the upper surface of the horizontal portion 44 has a vertical fold 47, the gap between the vertical fold 47 and the step structure forms the screw groove 471, and the top surface of the vertical fold 47 supports the edge of the back plate 20.

In this embodiment, the direct type panel lamp 100 further includes a driving cassette 60 installed at the back of the direct type panel lamp 100, and the driving module is installed in the driving cassette 60, thereby facilitating fixing and protecting the driving module, and simultaneously simplifying the maintenance or replacement of the driving module, thereby reducing the expenditure of time and labor cost.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. Direct type panel light, its characterized in that includes:

the LED lamp comprises at least one lamp strip and a light source, wherein the lamp strip comprises a substrate, LED lamp beads fixed on the substrate and lenses covered on the LED lamp beads;

the frame is formed by splicing a plurality of frame strips, and each frame strip is provided with a first mounting surface and a second mounting surface which are at different heights;

the diffusion plate has a light-transmitting function, forms a light-emitting surface, and is overlapped on the lower first mounting surface at the edge;

the back plate is of a housing-shaped structure which is made of a metal plate through deformation, the edge area of the back plate is overlapped on a second higher mounting surface, the central area is arched and is configured to mount and fix the light bar, the edge area is deformed into a convex rib extending along the side length direction of the back plate, and the convex rib abuts against the diffusion plate to enable the diffusion plate to be attached to the first mounting surface;

the first convex rib on each side of the back plate comprises first extension sections positioned at two ends and a second extension section positioned in the middle, and the height of the first extension section is higher than that of the second extension section along the height direction of the direct type panel lamp.

2. The direct type panel lamp according to claim 1, wherein two first ribs are continuously disposed at adjacent edges of the back plate along a circumferential direction of the back plate.

3. The direct type panel lamp according to claim 1 or 2, wherein the first extension segment is joined to the second extension segment by an arc-shaped transition surface for the same rib.

4. The direct type panel lamp according to claim 1 or 2, wherein the first extension segment has a height of H1, the second extension segment has a height of H2, and satisfies H1: h2 ═ (1.02-1.1): 1.

5. the direct type panel lamp according to claim 1, wherein the central area of the back plate is raised to form a cavity for accommodating the light bar, the cavity comprises a flat bottom wall and inclined side walls, and the bottom wall is provided with grooves for arranging the light bar in a criss-cross manner.

6. The direct type panel lamp according to claim 5, wherein the sidewall is deformed to have a step structure extending along a side length of the back plate, and the first portion and the second portion are formed at both sides of the step structure.

7. The direct type panel lamp according to claim 6, wherein the first portion is located between the diffusion plate and the step structure, and the second portion is located between the step structure and the bottom wall;

the included angle between the first portion and the light emitting surface is larger than the included angle between the second portion and the light emitting surface.

8. The direct type panel lamp according to claim 7, wherein the step structure is adjacent to the bottom wall.

9. The direct type panel lamp according to claim 1, wherein the frame strip has an L-shaped cross section, and comprises a horizontal portion and a vertical portion, wherein the edge of the diffuser plate and the edge of the back plate are overlapped on the horizontal portion, and the vertical portion forms a limited space for shielding the mounting structure of the edge of the back plate.

10. The direct type panel lamp according to claim 1, wherein the back plate has a thickness of 0.1mm to 0.4 mm.

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