CN216281255U - 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, a power line and at least one lamp strip; the back plate is of a housing-shaped structure formed by stamping a metal plate, the back plate is provided with a wire passing hole, the length of the wire passing hole along the first direction is L1, the length of the wire passing hole along the second direction is L2, and the L1 is larger than the L2; the diffusion plate seals the cavity; the frame is connected with the diffusion plate and the corresponding edge of the back plate; the power line comprises a protective sleeve and a lead, the lead penetrates through the protective sleeve and is electrically connected with the lamp strip, the protective sleeve is provided with a connector, the connector is provided with at least two elastic buckles, each elastic buckle is arranged along a first direction and enters the wire passing hole, and after the wire passing hole is rotated by a preset angle, each elastic buckle is respectively matched with the side wall of the wire passing hole, which is oppositely arranged along a second direction; this scheme is for prior art, and the protective sheath makes the power cord at the wire hole position relatively fixed of crossing, when dragging the power cord that exposes outside straight following formula surface lamp, the wire that is located the backplate can not be dragged.

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.

The backboard is provided with a wire passing hole, and a power wire of the driving power supply is electrically connected with the light-emitting component through the wire hole. During assembly and installation of the panel light, the power cord may be pulled, and the power cord may be separated from the light emitting assembly.

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, wherein each lamp strip comprises a substrate and a plurality of LED lamp beads arranged on the substrate, and the LED lamp beads are sequentially arranged along the length direction of the lamp strip;

the frame is formed by splicing a plurality of frame strips;

the diffusion plate has a light transmission function, and the edge of the diffusion plate is lapped on the frame;

the back plate is of a housing-shaped structure formed by stamping a metal plate, the edge area of the back plate is abutted against the edge of the diffusion plate, a recess is formed in the central area of the back plate and is spaced from the diffusion plate by a certain distance, each light bar is fixed on the bottom wall of the recess, the back plate is provided with a wire passing hole, the length of the wire passing hole along the first direction is L1, the length of the wire passing hole along the second direction is L2, and the L1 is larger than the L2;

the power cord, the power cord includes protective sheath and wire, the wire is worn to locate in the protective sheath, and via cross the line hole with the lamp strip electricity is connected, the protective sheath has a connector, the connector has a fitting surface at least and laminates mutually with the outside of backplate, and this fitting surface is provided with two at least ammunition buckles, and each ammunition buckle sets up and enters into along the first direction cross the line hole, after rotating preset angle, each ammunition buckle respectively with cross the relative lateral wall cooperation that sets up of line hole along the second direction, in order to stop the power cord breaks away from the backplate.

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, an included angle between the first direction and the second direction is 45 degrees to 90 degrees.

Optionally, the wire passing hole is arranged in a plane and/or an arc surface along two opposite sides of the first direction, and in a plane and/or an arc surface along two opposite sides of the second direction.

Optionally, the lateral wall of the connector be provided with connector integrated into one piece's installation department, the installation department laminates mutually with the outside of backplate and through the fastener with the backplate is connected.

Optionally, the fastener is a bolt or a screw;

the inner wall of the back plate is provided with a stud, and the fastener sequentially penetrates through the mounting part, the back plate and the stud.

Optionally, the protective sleeve has a first wire passing channel, the connector has a second wire passing channel communicated with the first wire passing channel, and the wire sequentially passes through the first wire passing channel and the second channel to be electrically connected with the light bar;

the wire with the protective sheath and/or the connector is relatively fixed.

Optionally, the number of the elastic buckles is at least two, and the two elastic buckles are respectively matched with the two opposite sides of the wire passing hole along the second direction to prevent the power line from being separated from the back plate.

Optionally, a fixing block is further disposed on the fitting surface of the connector, and the fixing block is located between the two elastic buckles and forms a gap for a lead to pass through with the corresponding elastic buckle.

Optionally, one end of the elastic buckle extending into the wire passing hole is provided with a hook-shaped structure, and the hook-shaped structure is matched with the matching surface to be fixed on the back plate;

the hook structure is hidden within the back plate.

Optionally, the surface of the back plate is provided with a plastic powder layer;

the thickness of the back plate is less than 2 mm.

Protective sheath in this application makes the power cord cross line hole position relatively fixed, when drawing and exposing the outer power cord of straight following formula face lamp, the wire that is located the backplate can not drawn to play and avoid taking place the problem that wire and lamp strip break away from mutually.

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 partial sectional view of the direct type panel lamp of fig. 1;

FIG. 3 is a partial structural view of the direct type panel lamp of FIG. 1;

FIG. 4 is a schematic diagram of the power line of FIG. 3;

FIG. 5 is a partial structural view of the direct type panel lamp of FIG. 3;

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. 6;

FIG. 8 is a schematic structural diagram of the circuit board of FIG. 6;

FIG. 9 is a schematic diagram of a conductive strip structure in FIG. 6;

fig. 10 is a schematic view of the frame strip in fig. 1.

The reference numerals in the figures are illustrated as follows:

100. a direct type panel lamp;

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; 22. an edge region; 221. a side wall; 222. a rib is protruded; 23. recessing; 24. a wire passing hole; 25. a stud;

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 fixed block; 533. snapping; 534. a hook-like structure; 54. a fastener; 55. an installation part.

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, 2 and 6, 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 edge region 22 of the back plate 20 abuts against the edge of the diffusion plate 30, and the central region forms a recess 23 spaced apart from the diffusion plate 30 by a predetermined distance, and each light bar 10 is fixed to the bottom wall 211 of the recess 23. The diffuser 30 is disposed opposite to the back plate 20 to close the recess 23, and the frame 40 is formed by splicing a plurality of (usually four) frame bars 41, each frame bar 41 being connected to the diffuser 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, and a plurality of LED point light sources form an even area light source after the light is diffused.

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. 3 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 connecting head 53, the connecting head 53 has at least one mating surface 531 which is attached to the outer side of the back plate 20, the mating surface 531 is provided with at least two elastic buckles 533, and each elastic buckle 533 extends into the wire passing hole 24 to prevent the power line 50 from separating from the back plate 20. The protective sleeve 52 fixes the power line 50 relatively at the position of the wire through hole 24, so that when the power line 50 exposed outside the direct type panel light 100 is pulled, the wires 51 in the back plate 20 (in the recess 23) are not pulled, thereby avoiding the problem that the wires 51 are separated from the light bar 10. Wherein, the number of the elastic buckles 533 is two, or more than two; and at least two elastic buckles 533 are oppositely arranged and matched with the side walls oppositely arranged with the wire through holes 24. In order to prevent the power line 50 from 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 installed state), in another embodiment, the wire passing hole 24 is opened at the side wall 221.

In order to facilitate the snap 533 to enter the wire through hole 24, referring to one embodiment, the length of the wire through hole 24 along the first direction (e.g., X direction in fig. 5) is L1, the length of the wire through hole 24 along the second direction (e.g., Y direction in fig. 5) is L2, and L1 is greater than L2; each elastic buckle 533 is arranged along the first direction and enters the wire passing hole 24, and after the elastic buckle 533 rotates by a preset angle, each elastic buckle 533 is respectively matched with the side wall of the wire passing hole 24, which is oppositely arranged along the second direction.

In another embodiment, the angle between the first direction and the second direction is 45 degrees to 90 degrees. Preferably, the angle between the first direction and the second direction is 90 degrees. After each elastic buckle 533 enters the wire passing hole 24 and rotates 90 degrees, each elastic buckle 533 is respectively matched with the side wall arranged opposite to the wire passing hole 24.

In the present embodiment, the wire passing hole 24 is disposed along two opposite sides of the first direction in a plane and/or arc shape, and along two opposite sides of the second direction in a plane and/or arc shape. In the present embodiment, the wire passing hole 24 is disposed in a plane along two opposite sides of the first direction, and disposed in a cambered surface along two opposite sides of the second direction.

In order to fix the connection head 53 to the back plate 20 more firmly, referring to one embodiment, the connection head 53 is connected to the back plate 20 by a fastening member 54. Wherein, the side wall of the connector 53 is provided with a mounting part 55 integrally formed with the connector, and the mounting part 55 is attached to the outer side of the back plate 20 and connected with the back plate 20 through a fastener 54.

In the present embodiment, the fasteners 54 are bolts or screws. In order to make the connection between the fastening member 54 and the back plate 20 more secure, in another embodiment, the inner wall of the back plate 20 is provided with a stud 25, and the fastening member 54 is connected with the stud 25 through the mounting portion 55 and the back plate 20 in sequence. The stud 25 is provided with a threaded hole, the back plate 20 and the mounting part 55 are both provided with through holes, wherein the through holes on the back plate 20 are communicated with the threaded hole, and the through holes of the mounting part 55 can be aligned with the through holes on the back plate 20; one end of the fastener 54 is threaded to the stud 25 after passing through the through holes of the back plate 20 and the mounting portion 55 in sequence. In another embodiment, the studs 25 are fixedly connected to the inner wall of the back plate 20 by welding or the like.

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 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 second length direction 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. The two snaps 533 extend into the wire passage hole 24, and a portion of the inner wall of the back plate 20 is located between the hook 534 and the mating surface 531. In order to avoid the hook structures 534 from affecting the appearance of the direct type panel light 100, in some embodiments, the hook structures 534 are hidden within the back plate 20.

In this embodiment, the mating surface 531 of the connector 53 is provided with a fixing block 532, and the fixing block 532 is located between two elastic buckles 533 and forms a gap for the wires 51 to pass through with the corresponding elastic buckles 533, so that the wires 51 pass through the connector 53 respectively.

In some embodiments, as shown in 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 may be a metal substrate, preferably an aluminum substrate, 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.

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. 2 and 10, 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.

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 back plate 20 within the recess 23 is coated with a light reflecting 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. In some embodiments, as shown in fig. 2, 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, and prevent it from pulling the frame 40 to deform the frame 40, so that the direct type panel light 100 is applied to the keel on the ceiling in a contact manner without a gap.

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, under the condition that the supporting strength of the back plate 20 is satisfied, in some embodiments, the surface of the back plate 20 is provided with a plastic powder layer; the thickness of the back plate 20 is less than 2 mm. Preferably, the thickness of the back plate 20 is less than 1.2 mm.

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

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, wherein each lamp strip comprises a substrate and a plurality of LED lamp beads arranged on the substrate, and the LED lamp beads are sequentially arranged along the length direction of the lamp strip;

the frame is formed by splicing a plurality of frame strips;

the diffusion plate has a light transmission function, and the edge of the diffusion plate is lapped on the frame;

the back plate is of a housing-shaped structure formed by stamping a metal plate, the edge area of the back plate is abutted against the edge of the diffusion plate, a recess is formed in the central area of the back plate and is spaced from the diffusion plate by a certain distance, each light bar is fixed on the bottom wall of the recess, the back plate is provided with a wire passing hole, the length of the wire passing hole along the first direction is L1, the length of the wire passing hole along the second direction is L2, and the L1 is larger than the L2;

the power cord, the power cord includes protective sheath and wire, the wire is worn to locate in the protective sheath, and via cross the line hole with the lamp strip electricity is connected, the protective sheath has a connector, the connector has a fitting surface at least and laminates mutually with the outside of backplate, and this fitting surface is provided with two at least ammunition buckles, and each ammunition buckle sets up and enters into along the first direction cross the line hole, after rotating preset angle, each ammunition buckle respectively with cross the relative lateral wall cooperation that sets up of line hole along the second direction, in order to stop the power cord breaks away from the backplate.

2. The direct type panel lamp according to claim 1, wherein an angle between the first direction and the second direction is 45-90 degrees.

3. The direct type panel lamp according to claim 1 or 2, wherein the wire through hole is formed in a plane and/or arc shape along two opposite sides in the first direction, and in a plane and/or arc shape along two opposite sides in the second direction.

4. The direct type panel lamp according to claim 1, wherein the side wall of the connecting head is provided with a mounting portion integrally formed with the connecting head, the mounting portion is attached to the outer side of the back plate and connected to the back plate through a fastening member.

5. The direct type panel lamp according to claim 4, wherein the fastening member is a bolt or a screw;

the inner wall of the back plate is provided with a stud, and the fastener sequentially penetrates through the mounting part, the back plate and the stud.

6. The direct type panel lamp as claimed in claim 1, wherein the protective sleeve has a first wire passage, the connecting head has a second wire passage connected to the first wire passage, and the wires are electrically connected to the light bar through the first wire passage and the second wire passage in sequence;

the wire with the protective sheath and/or the connector is relatively fixed.

7. The direct type panel lamp according to claim 1, wherein the number of the snap buttons is at least two, and the two snap buttons are respectively engaged with opposite sides of the wire through hole in the second direction to prevent the power wire from being separated from the back plate.

8. The direct type panel lamp according to claim 7, wherein the mating surface of the connecting head is further provided with a fixing block, the fixing block is located between the two elastic buckles, and a gap for a wire to pass through is formed between the fixing block and the corresponding elastic buckle.

9. The direct type panel lamp according to claim 1 or 7, wherein the ends of the elastic buckles extending into the wire passing holes are provided with hook structures, and the hook structures are matched with the matching surfaces to be fixed on the back plate;

the hook structure is hidden within the back plate.

10. The direct type panel lamp according to claim 1, wherein a surface of the back plate has a plastic powder layer;

the thickness of the back plate is less than 2 mm.

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