CN201513741U - A reflective LED lighting fixture - Google Patents

Abstract

The utility model provides a reflective LED lighting fixture, which comprises a lamp body reflector, an LED light source, a circuit board, a radiator and a driving power supply. A positioning bracket is installed on the side of the lamp body reflector at the group of light incident holes, the circuit board is installed on the positioning bracket, and the LED light source is installed on the circuit board. The number of LED light sources is the same, the light-emitting part of each LED light source is located in the curved body mirror (34) of a positioning bracket, and the light emitted by the light-emitting part of the LED light source passes through the light incident hole and shoots to the lamp body reflector , and then shoot to the lighting area through the reflector. The reflective lamp design solves the problem of LED glare, has the advantages of simple structure, convenient processing, good heat dissipation effect, uniform illumination, etc., and can be widely used in indoor lighting and other occasions.

Description

A reflective LED lighting fixture

technical field

The utility model relates to the technical field of LED lighting, in particular to a reflective LED lighting lamp.

Background technique

With the rapid development of light-emitting diode (LED) technology, high-power LED manufacturing technology has become increasingly mature. As a new type of lighting source, LED has become the best choice to replace traditional lighting sources due to its long life, small structure, safety, high efficiency and energy saving. At present, LED light sources have been used as landscape lighting and indoor lighting. However, in current LED lamps, a large number of ordinary small LED tubes or multiple power tubes are generally welded on one or more circuit boards, and then placed inside the lamp. There is a fatal defect in this closed lamp structure design, which is that the large amount of heat generated by the LED cannot be dissipated in time, which seriously affects the stability and service life of the LED light source. In addition, the LED lamps currently used generally let the LED light source directly emit toward the lighting space (usually the ground), while LED is a point light source, and the direct light is very uneven, causing glare problems, which is very irritating to human eyes. It affects the lighting effect of LED lamps, which is easy to cause visual fatigue and even vision loss.

Utility model content

The technical problem to be solved by the utility model is to overcome the problems of poor heat dissipation and glare pollution in existing LED lighting fixtures, and provide a reflective LED lighting fixture with simple structure, good heat dissipation effect, uniform illumination and soft light. The utility model is mainly realized through the following technical solutions:

A reflective LED lighting fixture, comprising a lamp body reflector, an LED light source, a circuit board, a heat sink, and a driving power supply, the side of the lamp body reflector is spaced apart from multiple groups of light incident holes, and at each group of light incident holes A positioning bracket is installed on the side of the reflector of the lamp body, the circuit board is installed on the positioning bracket, and the LED light source is installed on the circuit board. The number of holes in each group of light incident holes is equal to the number of LED light sources on each positioning bracket. As a result, the light-emitting part of each LED light source (6) is located in a curved mirror (34) inside a positioning bracket (3), and the light emitted by the light-emitting part of the LED light source passes through the light incident hole and shoots to the lamp body Reflector, and then shoot to the lighting area through the reflector.

In the above-mentioned reflective LED lighting fixture, there are several curved mirrors formed by depressions inside the positioning bracket, and the opening shape of each curved mirror is circular or oval, located inside the positioning bracket, and each LED light source The light-emitting part is located in a cavity surrounded by a curved mirror.

In the above-mentioned reflective LED lighting fixture, the reflector of the lamp body includes two port reflectors and several main reflectors, the port reflector is composed of a spherical arc surface, a connecting welt and a base, and the main reflector is composed of a curved arc surface, The main reflectors are connected by connecting welts, the port reflectors are connected with the main reflector at the outermost end by connecting welts, and multiple positioning brackets are installed on one side or both sides of the main reflectors. on the side.

In the above-mentioned reflective LED lighting fixture, screw ports are provided on the connecting edges of the main reflector and the port reflector, and the main reflector and the port reflector are connected by screws.

For the above-mentioned reflective LED lighting fixture, one side or two sides of the main reflector is provided with multiple groups of light incident holes, and the light incident holes are circular or elliptical, matching the opening shape of each curved mirror surface.

In the above-mentioned reflective LED lighting fixture, the circuit board is provided with multiple sets of screw holes corresponding to the positioning bracket, and the circuit board is fixedly connected to the positioning bracket through screws; the circuit board is provided with electrode wires, and the electrode wires are provided with LED Connecting port for light source and driving power.

In the above-mentioned reflective LED lighting fixture, the base of the LED light source is installed on the metal conductive layer on the upper surface of the circuit board, and the heat dissipation metal layer of the LED light source is in contact with the metal conductive layer, and the light-emitting part of the LED light source is located at Locate the inside of the bracket inside the curved body mirror.

In the above-mentioned reflective LED lighting fixture, the heat sink is composed of a heat sink substrate and a plurality of strip rods, the heat sink is installed on the circuit board, and after installation, the heat sink substrate of the heat sink is in close contact with the metal conductive layer on the lower surface of the circuit board .

In the reflective LED lighting fixture described above, the upper surface metal conduction layer and the lower surface metal conduction layer of the circuit board are connected to each other.

In the reflective LED lighting fixture described above, the positioning bracket and the reflector of the lamp body are connected by screws.

In the above-mentioned reflective LED lighting fixture, the inner wall of the reflector is a smooth arc surface or a smooth surface formed by connecting multiple polyhedral surfaces, or the inner wall of the reflector is composed of a plurality of small concave spherical crowns and convex surfaces. Composition of spherical crown.

Compared with prior art, overall beneficial effect of the utility model is as follows:

As the LED light source is installed on the outside, the good contact between the heat sink metal and the metal heat dissipation layer of the LED light source and the metal conduction layer of the circuit board is effectively used to achieve the best heat conduction, and through the appropriate design of the heat dissipation holes of the lamp base, the lamp holder can dissipate heat The heat sink on the upper layer of the hole can exchange heat with the air very well, greatly reducing the working temperature of the LED light source. The inner wall of the reflector of the lamp body is coated with high-reflective materials and the concave curved mirror surface inside the positioning bracket is designed with high reflectivity, which improves the utilization rate of the lighting space of the LED light. At the same time, the LED light incident holes on both sides of the main reflector are distributed alternately or correspondingly, so that the light emitted by the LED light source to the lighting space is soft and the illumination is more uniform.

The structural design of the lamp adopts modular components, in which the main reflector, positioning bracket, circuit board and heat sink can all be independent modular components. According to the requirements of the lighting space, the length of the LED lamp can be easily extended. In a word, the lighting fixture is simple in structure, convenient in processing, installation and maintenance, and saves cost.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model of the present invention is described in further detail.

Fig. 1 is a schematic diagram of the composition and installation of an LED lamp in an embodiment.

Figure 2 shows the reflector structure of the LED lamp.

Fig. 3 is a cross-sectional view of the main module of the reflective cover of the lamp (refer to the cut-away cross-sectional view of the positioning bracket in Fig. 5 ).

Fig. 4 is the reflected light of the section of the main module of the reflective cover of the lamp.

Fig. 5a is a schematic perspective view of the positioning bracket (viewed from the outside).

Fig. 5b is a schematic perspective view of the three-dimensional structure of the positioning bracket (viewed from the inside).

Figure 5c is a cross-sectional view of the positioning bracket (viewed from the inside).

Fig. 6a is a schematic structural diagram of an LED light source.

Fig. 6b is a schematic diagram of LED light source and circuit board installation.

Fig. 7a is a perspective view of the radiator in the embodiment.

Fig. 7b is a side view of the radiator shown in Fig. 7a.

Fig. 7c is a front view of the radiator shown in Fig. 7a.

Fig. 8 is a schematic structural diagram of an elongated LED lighting fixture.

Explanation of the reference signs in the figure:

1 Main reflector of lamp body; 2 Reflector of lamp body port; 3 Positioning bracket; 4 Circuit board; 5 Radiator; 6 High-power LED light source; Base screw holes; 14 light incident holes in the main reflector circular hole assembly. 15 screw holes; 16 the inner wall of the reflector; 17 the screws used to fix the positioning bracket on the outside of the reflector. 21 The connection welt of the reflector; 22 The screw port of the connection welt; 23 The screw used to fix the main reflector and the port reflector; 24 The base screw for fixing the lamp; 31 The small round hole of the positioning bracket; 32 The outside of the positioning bracket Screw port; 33 The screw port inside the positioning bracket; 34 The depression of the positioning bracket forms an arc reflection mirror; 41 The screw hole of the circuit board; 42 The metal conductive layer on the upper surface of the circuit board; 43 The metal conductive layer on the lower surface of the circuit board; 51 Heat dissipation 52 metal bar of the heat sink; 53 screw holes of the heat sink; 61 LED light source plastic cap; 62 heat dissipation metal layer of the LED light source; 63 electrode lines of the LED light source.

Detailed ways

Example 1:

Fig. 1 to Fig. 8 are preferred embodiments of a reflective LED lighting fixture with a cooling device of the present invention.

In this example, as shown in FIG. 1 , the reflective LED lamp with heat dissipation device includes a lamp body reflector, a high-power LED light source 6 , a positioning bracket 3 , a circuit board 4 , a radiator 5 and a driving power supply 7 . The reflector consists of a main reflector 1 and two port reflectors 2 . Ten screws 23 connect the main reflector and the two port reflectors into one. The two sides of the main reflector 1 are intersected with three groups of circular holes, and each group of circular holes is composed of three screw holes 15 and two light incident holes 14 . Each group of heat dissipation holes 12 on the reflector base 11 is located below each group of round holes, and the base is equipped with mounting screw holes 13, which are convenient for installing the lamp on the ceiling bracket with screws 24. Each group of heat dissipation holes is composed of 11 small circular holes. The holes are arranged regularly. As shown in Figures 5a to 5c, there are two depressions on the inside of each positioning bracket 3 to form a highly reflective curved mirror 34. The inside of the positioning bracket 3 is provided with a screw port 33 corresponding to the round hole of the main reflector, and its outside is provided with a mounting The screw port 32 of the circuit board and the radiator. As shown in FIG. 3 , a small circular hole 31 communicating with the outside of the positioning bracket is opened at the bottom of each curved mirror surface, and the diameter of the small circular hole is slightly larger than the diameter of the light-emitting cap 61 of the LED light source. The inner side of each positioning bracket is matched with a group of round holes of the main reflector (including the screw holes on the inner side of the positioning bracket corresponding to the screw holes of the round hole group, and the two curved mirror openings on the inner side of the bracket are matched with the two round hole group. corresponding to a light incident hole). After installation, the overall reflection direction of the curved mirror surface of the positioning bracket is inclined upward towards the inner wall 16 of the reflector. The circuit board is provided with multiple sets of screw holes corresponding to the positioning bracket, upper and lower metal conductive layers, electrode wires and current-limiting electronic components, wherein the metal conductive layers on the upper and lower surfaces of the circuit board are connected. FIG. 6 a is a schematic structural diagram of an LED light source. The LED light source includes a light emitting plastic cap 61 , a heat dissipation metal layer 62 and an electrode wire 63 . As shown in FIG. 6b, the LED light source 6 is placed on the metal conductive layer 43 on the upper surface of the circuit board 4 and interconnected with the electrode lines on the circuit board. Three groups of LED light sources are installed on one circuit board, and each group is composed of 2 high-power LEDs. The installation quantity and position correspond to the round hole group and positioning bracket of the reflector. Since the metal heat dissipation layer 62 of the LED light source being installed is in good contact with the metal conductive layer of the circuit board, the heat emitted by the LED can be conducted to the upper and lower surfaces of the circuit board in time. The heat dissipation body 5 is integrally formed by die-casting a heat dissipation metal substrate 51 and several metal bars 52, and the material used is aluminum, aluminum alloy or copper. The height of the metal strips of the heat sink is different, the middle is high and the two sides are low, and they are distributed in an arc shape. The metal base plate 51 of the radiator is provided with two screw holes 53, the positions of which correspond to the screw holes 41 of the circuit board and the screw ports 32 of the positioning bracket. The circuit board is located between the outside of the positioning bracket and the radiator, and the circuit board (including the LED light source) and the radiator are tightly combined on the outside of the positioning bracket by screws 51. At this time, the lower surface conductive layer 42 of the circuit board and the metal substrate of the radiator Forming good contact can realize rapid heat conduction, and finally exchange energy through the convection between the radiator and the air, quickly take away the heat emitted by the LED light source, and reduce the working temperature of the LED light source. The driving power supply 7 of the LED can be installed on the top of the main reflector of the lamp body or be powered independently by an external power supply. The main reflector of the LED lamp in this example is equipped with six positioning brackets, two circuit boards and six radiators. The length range of the main reflector is between 500mm and 750mm. In order to make the lighting space have a more uniform light distribution, the positioning brackets located on both sides of the main reflector are arranged in a staggered distribution, as shown in Figure 2.

Figure 4 shows the reflection process of the LED light of this example luminaire into the lighting space. The light emitted by the LED light source directly to the inner wall of the reflector and the light that enters the inner wall of the reflector after being reflected by the mirror surface of the inner arc of the positioning bracket first enters the lighting space after being reflected by the inner wall of the reflector. After trial, the heat dissipation effect of this lamp is excellent, and there is no problem of glare.

Example 2:

In order to increase the scope of the lighting space, an elongated reflective LED lamp can be assembled by using multiple main reflectors and two port reflectors. This embodiment 2 is shown in Figure 8. It is a long reflective LED lamp composed of two main reflectors and two port reflectors. The main reflector of the lamp and the main reflector are tightly connected by five screws 23. combined into one. Other detailed implementation processes are basically the same as Embodiment 1, except that the number of positioning brackets, circuit boards, LED light sources, heat sinks and driving power needs to be doubled. In this embodiment, the main reflector includes a curved arc (it can be said to be a part of the side of the cylinder), a connecting edge and a base, and the port reflector can be composed of a spherical arc, a connecting edge and a base, or can be made of various concave shapes. , Convex, arc plane, connection welt 21 and base form together. The main reflector and the port reflector are tightly combined into a complete lamp body reflector through the screw port 22 and the screw 23 connecting the welt. The opening diameter of the concave curved mirror surface on the inner side of the positioning bracket matches and corresponds to the aperture diameter of the light incident hole of the main reflector. Screw 17 fixes the positioning bracket on the corresponding position on the outside of the main reflector. After installation, the overall reflection direction of the curved mirror surface of the positioning bracket is inclined upward toward the inner wall of the reflector. The bottom of the curved mirror surface is provided with a small round hole communicating with the outside of the positioning bracket. The diameter of this small round hole is slightly larger than the diameter of the light emitting cap of the LED light source. . The light-emitting part of the LED light source passes through the small round hole and is placed in the inner cavity of the curved mirror. The circuit board 4 is provided with multiple sets of screw holes corresponding to the positioning bracket, upper and lower metal conductive layers, electrode wires and current-limiting electronic components, wherein the metal conductive layers on the upper and lower surfaces of the circuit board are connected. The electrode wire is provided with a connection port with an LED light source and a driving power supply. The heat conduction layer on the surface of the installed circuit board directly forms good contact with the metal heat dissipation layer of the LED light source, and can quickly transmit the heat emitted by the LED light source to the heat sink through the upper and lower heat conduction layers of the circuit board. As shown in FIGS. 7 a to 7 c , the radiator 5 is integrally formed by die-casting a radiator substrate 51 and a plurality of bar bars 52 , wherein the radiator substrate is provided with screw holes 53 corresponding to the positioning bracket and the circuit board. The circuit board is located between the outside of the positioning bracket and the heat dissipation metal substrate of the radiator, and the circuit board (including the LED light source) and the radiator are fixed on the outside of the positioning bracket by screws 51 . The base of the main reflector is provided with multiple groups of heat dissipation holes 12, each group of heat dissipation holes is composed of a large number of small heat dissipation holes, which are mainly distributed under the group of round holes (also under the heat dissipation body). The design of cooling holes can promote better energy exchange of the air flow up and down the base. The upper layer of air at the base of the reflector can quickly take away the energy of the radiator, so that the LED lamp has the best heat dissipation effect, and improves the stability and life of the LED light source.

In this embodiment, the structural material of the reflector of the lamp body may be hard plastic, or metal materials such as aluminum, aluminum alloy, iron, and copper. The inner wall of the reflector of the lamp body is plated with a high-reflectivity film material or sprayed with a high-reflectivity coating material, and the material can be an organic or inorganic material.

The light emitted by the LED light source directly to the inner wall of the reflector and the light that enters the inner wall of the reflector after being reflected by the mirror surface of the inner arc of the positioning bracket first enters the lighting space after being reflected by the inner wall of the reflector. In this way, the light irradiated into the lighting space is both soft and uniform, which solves the glare problem commonly existing in current LED lighting fixtures.

Claims (10)

1. reflecting LED lighting, comprise the lamp body reflector, led light source (6), wiring board (4), radiator (5) and driving power (7), the side that it is characterized in that described lamp body reflector has at interval how the group light are gone into perforation (14), go into all corresponding locating support (3) that is equipped with in lamp body reflector side that perforation (14) is located at every group of light, wiring board (4) is installed on the locating support (3), led light source (6) is installed on the wiring board (4), it is consistent with led light source (6) number on each locating support (3) that every group of light is gone into the hole count of perforation (14), each locating support (3) is provided with several cavitys that is surrounded by arc somascope face (34), the luminous site of each led light source (6) is positioned at a cavity, it is relative that the opening of each described cavity and a light are gone into perforation (14), the part light that led light source (6) sends is gone into the described lamp body reflector of perforation (14) directive by light after arc somascope face (34) reflection, another part light is directly gone into perforation (14) directive lamp body reflector by light, and light after reflection is finally from the light-emitting window directive field of illumination of lamp body reflector.

2. reflecting LED lighting according to claim 1, it is characterized in that described lamp body reflector comprises two port reflectors (2) and several principal reflection covers (1), connect by connecting welt between each principal reflection cover (1), port reflector (2) connects by being connected welt with the principal reflection cover (1) that is in outermost end, and a plurality of locating supports (3) are installed on the one or both sides of principal reflection cover (1).

3. reflecting LED lighting according to claim 2 is characterized in that the welt that is connected of principal reflection cover (1) and port reflector (2) is equipped with screw-socket (22), connects by screw (23) between principal reflection cover (1) and the port reflector (2).

4. reflecting LED lighting according to claim 2 is characterized in that the one or both sides of principal reflection cover are provided with how the described light of group is gone into perforation (14), and light is gone into perforation (14) for circular or oval.

5. reflecting LED lighting according to claim 2 is characterized in that port reflector (2) is made of spherical arc, connection welt and base, and principal reflection cover (1) is made of crooked cambered surface, connection welt and base.

6. reflecting LED lighting according to claim 1 is characterized in that described wiring board (4) is provided with many groups and the corresponding screw hole of locating support (3), and wiring board (4) is fixedlyed connected with locating support (3) by screw; Wiring board (4) is provided with electrode wires, and electrode wires is provided with the connector with led light source (6) and driving power (7).

7. reflecting LED lighting according to claim 6, the pedestal that it is characterized in that described led light source (6) is installed on the metal conductive layers of wiring board (4) upper surface, and the heat radiating metallic layer (62) of led light source (6) pedestal is contacted with described metal conductive layers, the luminous site of led light source (6) is positioned at the inboard arc somascope face (34) of locating support (3).

8. reflecting LED lighting according to claim 1 is characterised in that described radiator (5) is installed on the wiring board (4), and radiator (5) is made of a heat-radiating substrate (51) and many bar shaped rods (52).

9. according to each described reflecting LED lighting of claim 1～8, it is characterized in that being connected by screw (17) between locating support (3) and the lamp body reflector.

10. reflecting LED lighting according to claim 9, the inwall that it is characterized in that described reflector is smooth cambered surface or the smooth surface that is linked by a plurality of polyhedrons surface, or the inwall of described reflector is made up of a plurality of little recessed ball spherical crown surfaces and protruding ball spherical crown surface.

Images