WO2015081625A1

WO2015081625A1 - Downward-emitting led lamp

Info

Publication number: WO2015081625A1
Application number: PCT/CN2014/070775
Authority: WO
Inventors: 史杰
Original assignee: 史杰
Priority date: 2013-12-06
Filing date: 2014-01-17
Publication date: 2015-06-11

Abstract

A downward-emitting LED lamp comprises a lamp cap (6), a lamp holder (5), an LED light source component (2), a lens (7), a reflector (4), a light transmissive cover (3), and a heat dissipation body (1). The lamp cap (6), the lamp holder (5), and the reflector (4) are arranged at one end of the light transmissive cover (3), and the heat dissipation body (1) is fastened at the other end of the light transmissive cover (3). The inner end of the heat dissipation body (1) is located in the light transmissive cover (3), and the outer end of the heat dissipation body (1) extends out of the light transmissive cover (3). A light emitting chamber is formed between the reflector (4) and the light transmissive cover (3), and the LED light source component (2) and the lens (7) are arranged in the light emitting chamber. A light emitting side of the LED light source component (2) is mounted on the lens (7), and a backlight side is mounted at the inner end of the heat dissipation body (1). By using the arrangement of the conical heat dissipation body (1), the downward-emitting LED lamp can provide good heat dissipation for the LED light source component (2). The reflector (4), the light transmissive cover (3), and the lens (7) form a light source chamber for secondary light distribution, so that downward emission is achieved, avoiding the problem that most of light is emitted to the ceiling, and improving the effective utilization of light.

Description

Down light LED bulb

Related application

This patent application claims the priority of the Chinese patent application entitled "Lower-light LED Bulb", which is applied for on December 6, 2013, the application number is 201320795880.7, and the application number is 201320840999.1, the application number is 201320840999.1 The priority of the Chinese Patent Application for "High Angle Imitation Diamond Type Secondary Optical Lens" is hereby incorporated by reference in its entirety.

Technical field

The utility model relates to the field of semiconductor lighting products, and more particularly to a downlight LED bulb.

Background technique

Most of the chips used in LED bulbs on the market are Lambertian, and their light-emitting directions are mostly consistent with the mounting direction. When the bulb is installed vertically, for example, when mounted on a lamp, most of the emitted light is Irradiation on the ceiling creates a waste of resources and is contrary to the concept of LED environmental protection and energy conservation.

Utility model content

Based on this, it is necessary to aim at the light-emitting direction of the LED bulb existing in the prior art, which is mostly consistent with the installation direction, resulting in waste of resources, and can not fully utilize the light energy of the LED bulb, and provides a down-light LED bulb with good heat dissipation effect. Moreover, it can ensure the illumination direction of the LED bulb, realize the downward illumination, and make full use of the light energy of the LED bulb.

The technical solution of the utility model is as follows:

A downlighting LED bulb includes a lamp cap, a lamp holder, an LED light source assembly, a lens, a reflector, a transmissive cover and a heat sink; wherein the lamp cap, the lamp holder and the reflector are disposed at one end of the translucent cover, The heat dissipating body is fixed at the other end of the transparent cover, the inner end of the heat dissipating body is located in the translucent cover, and the outer end of the heat dissipating body extends outside the translucent cover; An illumination cavity is formed between the reflector and the transmissive cover, the LED light source assembly and the lens are disposed in the illumination cavity, and a light emitting side of the LED light source component is mounted on the lens, and a backlight of the LED light source component The side is mounted on the inner side of the heat sink.

Preferably, one end of the lens is provided with a mounting hole for mounting the LED light source assembly, and the other end of the lens is formed with a lens cavity for accommodating the LED light source assembly, the lens facing the LED a portion of the light source assembly is a central portion, and an inner side of the inner surface of the central portion is a first reflective surface, and an outer surface of the central portion The inner side is a second reflecting surface, and the emitted light of the LED light source assembly can be totally reflected on the first reflecting surface and the second reflecting surface, respectively. Preferably, the central section of the central portion of the lens (i.e., the longitudinal section in which the central axis is located) is inverted V-shaped. Preferably, the lens comprises at least two sets of refractive surface arrays consisting of a plurality of refractive surfaces such that the exterior of the lens forms a diamond-like multi-section.

Preferably, the outer diamond-like multi-section of the lens is symmetrical about a central axis of the lens.

Preferably, the outer refractive surface of the lens is a curved surface, a flat surface, a diamond surface or a diamond surface.

Preferably, the outer diamond-like multi-section of the lens is formed by glass or crystal cutting or by plexiglass (including PC, PMMA, etc.).

Preferably, a portion of the heat sink that extends outside the light transmissive cover is conical.

Preferably, an electrical cavity is formed between the socket and the reflector, and the electrical cavity is provided with a driving component, and the LED light source component is electrically connected to the driving component through a pin passing through the lens.

Preferably, the reflector is provided with a card slot adapted to be inserted into the translucent cover, and the reflector is mounted on the lamp holder. Preferably, a light source cavity for secondary light distribution is formed between the reflector, the transparent cover and the lens.

Preferably, the heat sink body is made of a metal heat dissipating material.

Preferably, the translucent cover has a shape of a candle, a circle, a sphere or an olive.

Preferably, the downlight LED bulb has a shape of a candle, a circle, a sphere or an olive.

The beneficial effects of the utility model are:

According to the downlighting LED bulb of the present invention, the light emitted from the LED light source assembly can be totally reflected on the first reflecting surface and the second reflecting surface of the lens, respectively, and the reflector, the transparent cover and the lens are formed. The second light distribution of the light source cavity, thereby achieving downward emission, avoiding most of the light shining on the ceiling, and improving the effective utilization of light energy.

By fixing the LED light source assembly to the inner end of the heat sink, the conical outer end of the heat sink extends outside the light-transmitting cover to achieve good heat dissipation of the LED light source assembly. Moreover, by disposing the LED light source component and the driving component in the light emitting cavity and the electrical cavity respectively, the two heat sources of the LED light source component and the driving component are separated, and the heat is separately cooled, thereby achieving better heat dissipation effect.

The transparent cover has an overall shape of a candle shape, a round shape, a spherical shape or an olive type, and the transparent cover can be made of other transparent materials such as glass and transparent resin. The downlight LED bulb has a shape of a candle, a circle, a sphere or an olive. Thus, while ensuring a better illumination direction, the lower-emitting LED bulb has a beautiful appearance and is more colorful with the crystal chandelier. DRAWINGS

1 is a schematic structural view of an embodiment of a lower-emitting LED bulb of the present invention;

Figure 2 is a cross-sectional view of one embodiment of a lens in the lower light LED bulb of the present invention;

Figure 3 is a perspective view of the lens shown in Figure 2;

Figure 4 is a schematic view showing the principle of light reflection and refraction of the lens shown in Figure 2;

Fig. 5 is a view showing the light distribution effect of the downlighting LED bulb shown in Fig. 1.

Of which: 1-heat sink, 2-LED light source assembly, 3-transmission cover, 4-reflector, 5-lamp holder, 6-lamp, 7-lens, 8-pin, 9-drive assembly, 33-LED Light source mounting hole, 31-lens inner surface, 32-lens outer surface, 321-refractive surface, 41-first reflecting surface, 42-second reflecting surface. detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments to make the technical solutions of the present invention easier to understand and grasp.

As shown in FIG. 1, in one embodiment of the present invention, the downlight LED bulb includes a lamp cap 6, a lamp holder 5, an LED light source assembly 2, a lens 7, a reflector 4, a transmissive cover 3, and a heat sink 1. The lamp holder 6, the lamp holder 5 and the reflector 4 are disposed at the lower end of the translucent cover 3, the heat dissipating body 1 is fixed at the upper end of the translucent cover 3, the lower end of the heat dissipating body 1 is located inside the transmissive cover 3, and the upper end of the heat dissipating body 1 is extended. Outside the translucent cover 3.

Preferably, the portion of the heat sink 1 that extends beyond the light transmissive cover 3 has a conical shape. Preferably, the heat sink 1 is made of a metal heat sink material.

Preferably, the reflector 4 is provided with a card slot adapted to be inserted into the transmissive cover 3, and the reflector 4 is snapped onto the socket 5.

An illumination cavity is formed between the reflector 4 and the translucent cover 3, the LED light source assembly 2 and the lens 7 are disposed in the illumination cavity, and the light emitting side of the LED light source assembly 2 is mounted on the lens 7, and the backlight side of the LED light source assembly 2 Installed at the lower end of the heat sink 1.

By fixing the LED light source unit 2 to the lower end of the heat radiating body 1, the conical upper end of the heat radiating body 1 extends outside the light transmissive cover 3, and good heat dissipation to the LED light source unit 2 can be achieved.

Preferably, an electrical cavity is formed between the socket 5 and the reflector 4, and a drive assembly 9 is provided in the electrical cavity, and the LED light source assembly 2 is electrically connected to the drive assembly 9 through a pin 8 passing through the lens 7.

By disposing the LED light source assembly 2 and the driving assembly 9 in the light-emitting cavity and the electrical cavity respectively, the two heat sources of the LED light source component 2 and the driving component 9 are separated and separately radiated, thereby achieving a better heat dissipation effect. Preferably, the translucent cover 3 is in the shape of a candle, and may also be of a round shape, a spherical shape or an olive type. The translucent cover 3 can be made of other transparent materials such as glass and transparent resin. Preferably, the downlight LED bulb has a shape of a candle, and may also be a round shape, a spherical shape or an olive type. Thus, while ensuring a better illumination direction, the lower-emitting LED bulb has a beautiful appearance and is more colorful with the crystal chandelier.

As shown in FIG. 2, in an embodiment of the present invention, the upper end of the lens 7 is provided with a mounting hole 33 for mounting the LED light source assembly 2, and the lower end of the lens 7 is formed with a lens cavity for accommodating the LED light source assembly 2. A portion of the lens 7 facing the LED light source unit 2 is a central portion, an inner side of the inner surface of the central portion is a first reflecting surface 41, and an inner side of an outer surface of the central portion is a second reflecting surface 42. Preferably, the central section of the central portion of the lens 7 (i.e., the longitudinal section in which the central axis is located) is inverted V-shaped.

Preferably, as shown in Fig. 3, the lens 7 includes two or more sets of refractive surface arrays composed of a plurality of refractive faces 321 such that the outer portion of the lens 7 forms a diamond-like multi-section. Preferably, the refractive surface 321 may be one or more of a curved surface, a flat surface, a diamond surface, and a diamond surface. Preferably, the diamond-like multi-section of the outer portion of the lens 7 is center-symmetrical with respect to the central axis 0 of the lens 7.

As shown in FIG. 4, when the LED light source unit 2 is mounted in the mounting hole, the inverted V-shaped first reflecting surface 41 and the inverted V-shaped second reflecting surface 42 are close to the LED chip, and the LED chip can only be used as a surface. The light source, the light emitted from the front surface is totally reflected on the inverted V-shaped first reflecting surface 41 and the inverted V-shaped second reflecting surface 42, and is refracted through the side portion of the lens 7 and then emitted. The outgoing light having a larger side angle of the LED chip is directly refracted by the side of the lens 7 and then emitted.

The lens 7 is light-transmissive and can be cut from materials such as glass or crystal, or directly molded from materials such as PC and PMMA.

As shown in FIG. 5, in one embodiment of the present invention, the backlight side of the LED chip is mounted on the lower end of the heat sink 1, the light emitting side of the LED chip is downward, and between the reflector 4, the transmissive cover 3 and the lens 7. A light source cavity that forms a secondary light distribution.

After the light emitted by the LED chip passes through the reflection-refraction of the lens 7, most of it is emitted toward the lower side of the lamp body, and a small portion of the light emitted from the front side is reflected by the reflective cup 4 to the upper portion of the bulb, so that the entire bulb is lightly distributed at 300°, and the crystal is bright. effect.

Finally, the above description is only a preferred example of the present invention, and is not limited to the present invention. For those skilled in the art, the technical solutions described in the foregoing examples can still be modified. Or equivalent replacement of some of the technical features. Any modifications, substitutions, and improvements made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

1. A down-emitting LED light bulb, including a lamp holder (6), a lamp holder (5), an LED light source component (2), a lens (7), a reflector (4), a light-transmitting cover (3) and a heat sink (1) ); It is characterized in that: the lamp holder (6), lamp holder (5) and reflector (4) are arranged at one end of the light-transmitting cover (3), and the heat sink (1) is fixed on the light-transmitting cover (3). The other end of the cover (3), the inner end of the heat sink (1) is located within the light-transmitting cover (3), and the outer end of the heat sink (1) extends to the light-transmitting cover (3) In addition; a light-emitting cavity is formed between the reflector (4) and the light-transmitting cover (3), the LED light source assembly (2) and the lens (7) are arranged in the light-emitting cavity, the LED light source assembly The light-emitting side of (2) is installed on the lens (7), and the backlight side of the LED light source assembly (2) is installed on the inner end of the heat sink (1).

2. The downlight LED bulb according to claim 1, characterized in that: one end of the lens (7) is provided with a mounting hole (33) for mounting the LED light source assembly (2), and the lens (7) ) is formed at the other end with a lens cavity for accommodating the LED light source component (2), the part of the lens (7) facing the LED light source component (2) is the central part, and the inner part of the central part The inner side of the surface is a first reflective surface (41), the inner side of the outer surface of the central part is a second reflective surface (42), and the emitted light of the LED light source assembly (2) is reflected on the first reflective surface (41). ) and the second reflective surface (42) can respectively produce total reflection.

3. The downlight LED bulb according to claim 2, characterized in that: the central section of the central part of the lens (7) is in an inverted V shape.

4. The downlight LED bulb according to claim 2, characterized in that: the lens (7) includes at least two sets of refractive surface arrays composed of a plurality of refractive surfaces, so that the exterior of the lens forms an imitation diamond-shaped polygon. section.

5. The downlight LED bulb according to claim 4, characterized in that: the external diamond-like multi-section of the lens (7) is centrally symmetrical about the central axis of the lens.

6. The downlight LED bulb according to claim 4, characterized in that: the external refractive surface of the lens (7) is an arc surface, a flat surface, a rhombus surface or a diamond surface.

7. The downlight LED bulb according to claim 4, characterized in that: the external diamond-like multi-section of the lens (7) is cut and molded by glass or crystal or injection molded by organic glass.

8. The downlight LED bulb according to any one of claims 1 to 7, characterized in that: the portion of the heat sink (1) extending outside the light-transmitting cover (3) is conical.

9. The downlight LED bulb according to any one of claims 1 to 7, characterized in that: the reflector (4) is provided with a slot suitable for plugging the light-transmitting cover (3), so The reflector (4) is mounted on the lamp holder (5).

10. The downlight LED bulb according to any one of claims 1 to 7, characterized in that: a secondary light distribution is formed between the reflector (4), the light-transmitting cover (3) and the lens (7) light source cavity.

11. The downlight LED bulb according to any one of claims 1 to 7, characterized in that: the heat sink (1) is made of metal heat dissipation material.

12. The downlight LED bulb according to any one of claims 1 to 7, characterized in that: the shape of the light-transmitting cover (3) is candle-shaped, round, spherical or olive-shaped.

13. The downlight LED bulb according to any one of claims 1 to 7, characterized in that: the shape of the downlight LED bulb is candle-shaped, round, spherical or olive-shaped.