CN205535396U - Light -emitting diode (LED) tube lamp - Google Patents

Abstract

The utility model discloses an LED downlight, which comprises a power supply, a lamp body and a front decoration ring. The power supply is connected to the upper part of the lamp body, and the lower part of the lamp body is connected to the front decoration ring. The utility model can eliminate stroboscopic flicker, the luminous surface is soft and even, and the efficiency of the lamp is high.

Description

A kind of LED downlight

technical field

The utility model relates to an LED lamp, in particular to an LED downlight.

Background technique

At present, the commonly used LED downlights in the market are mainly divided into two categories. The first category is the structure of SMD lamp board + aluminum heat dissipation shell + diffusion plate + external power supply. The second category is COB light source + aluminum heat dissipation shell + reflector. + The structure of the external power supply, but for the first category of LED downlights, there are still some defects, mainly manifested as: stroboscopic, low power supply efficiency, inconvenient installation, low light efficiency, high height, light-emitting surface Uneven, but also easy to accumulate dust, insufficient heat dissipation and short service life.

Utility model content

Aiming at the deficiencies in the above-mentioned prior art, the purpose of this utility model is to provide an LED downlight, which can eliminate stroboscopic flicker, have a soft and uniform light-emitting surface, and have high lamp efficiency.

In order to achieve the above object, the utility model adopts the following technical solutions:

An LED downlight, comprising a power supply, a lamp body and a front bezel, the power supply is connected to the top of the lamp body, and the bottom of the lamp body is connected to the front bezel;

The lamp body includes cooling fins and a lampshade. The top of the cooling fins is connected to the power supply, and the bottom of the cooling fins is connected to the top of the lampshade. The lampshade is an inverted concave cavity with the bottom facing the cooling fins and the opening facing downwards. The surroundings are connected with the front decorative ring, the bottom of the lampshade is equipped with an SMD lamp board, and a corresponding through hole is opened in the center of the lamp body and the SMD lamp board, and a locking wire buckle is worn on the two through holes, and the locking wire buckle is used for To realize threading and locking of wires, a layer of reflective film is provided on the side of the lampshade, and a diffusion plate is arranged between the lampshade and the front bezel.

The heat dissipation fins are arranged in an array around the central axis, and the central surface is a concave surface.

The diameter of the opening of the lampshade is larger than the diameter of the bottom.

The through hole of the lamp body is also provided with a groove hole.

The locking wire buckle is fixed on the lamp body through a nut, and the nut is arranged in the groove hole.

The locking wire buckle protrudes from the SMD lamp board.

Among the above technical solutions, the utility model has the following beneficial effects:

1. The power supply and the lamp body are fixed together, and the whole lamp is compact, low in height and light in weight, which not only improves the installation efficiency but also expands the application range, and is suitable for ceilings in low-ceiling spaces;

2. The special lock wire buckle structure design in the middle of the lamp body, the structure is simple and powerful, which not only ensures the safety performance, but also further compresses the structural space;

3. The heat dissipation fins are concentrated on the back of the SMD lamp board, which greatly improves the heat dissipation capacity of the lamp body and saves material costs;

4. High power efficiency, the line topology is a half-bridge LLC economical structure, the extremely low current output ripple, so that the whole lamp has no flicker, and the cost is reduced by 1/3 compared with the original;

5. The overall lighting efficiency is improved, the reliability and life of the lamp are further extended.

Description of drawings

Fig. 1 is the schematic diagram of the utility model;

Fig. 2 is a sectional view of the utility model.

detailed description

The technical scheme of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1 to Figure 2, a LED downlight of the present invention includes a power supply 1, a lamp body 2 and a front trim ring 3, the power supply 1 is connected to the top of the lamp body 2, and the bottom of the lamp body 2 is connected to the front Bezel 3, due to the limitation of installation height, this embodiment selects a 6-inch LED downlight, the height of which does not exceed 90mm, and the power supply 1 and lamp body 2 are fixed together, so there is no strobe.

The lamp body 2 includes cooling fins 201 and a lampshade 202. The top of the cooling fins 201 is connected to the power supply 1, and the bottom of the cooling fins 201 is connected to the top of the lampshade 202. The cooling fins 201 are arranged in an array around the central axis, and the center The surface is a concave surface, with protrusions around; the lampshade 202 is an inverted concave cavity, similar to a semi-conical shape, the diameter of the opening is greater than the diameter of the bottom, and the bottom faces the cooling fins 201, the opening faces downward and the surrounding Connecting the front bezel 3, the bottom of the lampshade 202 is provided with an SMD lamp board 4, and a corresponding through hole is opened in the center of the lamp body 2 and the SMD lamp board 4, and a lock wire buckle 5 is threaded through the two through holes, and the lock The wire buckle 5 is used to pass through and lock the wire 6. The through hole of the lamp body 2 is also provided with a groove hole, and the nut 7 is arranged in the groove hole, and the locking wire buckle 5 is fixed on the lamp body 2 through the nut 7 , in this structural design, the nut 7 sinks in the groove hole, the SMD light board 4 covers it, the locking wire buckle 5 and the wire 6 pass through the hole in the middle of the SMD light board 4, and the locking wire buckle 5 just protrudes larger than On the surface of the SMD lamp board 4, the locking wire buckle 5 made of plastic just forms a layer of insulation between the wire 6 and the SMD lamp board 4, and at the same time does not affect the light output of the lamp beads, which greatly increases the safety performance of the lamp. , There is a horizontal screw locking wire 6 inside the locking wire buckle 5 above the lamp body 2. This structural design is simple and powerful, which not only ensures the safety performance, but also further compresses the structural space, and at the same time, it is not easy for dust to enter the lamp body here on the back. 2 in the cavity.

A layer of reflective film 8 is provided on the side of the lampshade 202 , and a diffusion plate 9 is arranged between the lampshade 202 and the front bezel 3 , and the diffuser plate 9 is lifted and fixed on the lamp body 2 by the lowermost front bezel 3 .

In addition, in order to make the light-emitting surface uniform and soft, and the lamps and lanterns have high efficiency, the following conditions must be met:

(D-d)/h=0.92～0.94;

a/h<0.67;

b/h<0.52;

In the formula, D is the radius of the light outlet, d is the radius of the outermost light source arrangement of the SMD lamp board, h is the height from the surface of the light source on the SMD lamp board to the diffuser plate, a is the distance between the lamp beads, and b is the SMD lamp board Radius of the innermost light source arrangement.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above-mentioned The changes and modifications of the embodiments will all fall within the scope of the claims of the present utility model.

Claims (6)

1. a LED down, it is characterised in that include power supply, lamp body and front decorative circle, power supply is even Being connected to the top of lamp body, the lower section of lamp body connects front decorative circle；

Lamp body includes radiating fin and lampshade, radiating fin be connected above in power supply, radiating fin Lower section is connected to the top of lampshade, and lampshade is an inverted concave cavity, towards in heat radiating fin bottom it Sheet, peristome down and surrounding connect before decorative circle, the bottom of lampshade is provided with SMD lamp plate, lamp body and SMD lamp plate the most all offers a corresponding through hole, two through holes are equipped with buckle for locking wire, lock Cableties are in order to realize wearing and locking wire, and the side in lampshade is provided with one layer of reflective membrane, lampshade with One piece of diffuser plate it is provided with between front decorative circle.

2. a kind of LED down as claimed in claim 1, it is characterised in that described radiating fin For arranging round central shaft array, and median plane is a concave surface.

3. a kind of LED down as claimed in claim 1, it is characterised in that described lampshade opening The diameter in portion is more than the diameter of bottom.

4. a kind of LED down as claimed in claim 1, it is characterised in that leading to of described lamp body Recess hole it is further opened with on hole.

5. a kind of LED down as claimed in claim 4, it is characterised in that described buckle for locking wire leads to Crossing nut to be fixed on lamp body, nut is located in recess hole.

6. a kind of LED down as claimed in claim 1, it is characterised in that described buckle for locking wire is convex Arise from SMD lamp plate.