CN102072458B - Lens for LED lamp - Google Patents

Abstract

The invention discloses a lens for an LED lamp, which comprises a first lens body and a second lens body which are integrally formed, wherein the central axes of the first lens body and the second lens body are superposed, an LED light source accommodating space is arranged in the first lens body, the LED light source accommodating space is provided with an incident side surface and an incident bottom surface for light rays to enter the first lens body, the first lens body is provided with a refraction surface, and the refraction surface can refract the light rays projected from the incident side surface to the refraction surface onto a lamp cup of the lamp; the second lens body is provided with an inner space which is symmetrical around the central axis of the second lens body, the inner space is provided with an inner reflecting surface, and the inner reflecting surface can reflect the light projected to the inner reflecting surface from the incident bottom surface to the lamp cup of the lamp; the invention makes the light emit after reflecting to the lamp cup of the lamp through the refraction surface and the internal reflection surface of the internal space, so as to avoid the light emitted by the LED from being too concentrated, prevent dazzling due to the too concentrated light and make the light emitted by the LED soft and comfortable.

Description

Lenses for LED Luminaires

technical field

The invention relates to a lens, in particular to a lens applied to an LED lamp.

Background technique

LED (Light Emitting Diode) has been widely used as a lighting source. Due to the special light-emitting principle of LED, the energy consumed by it to achieve the same brightness is far lower than that of ordinary incandescent lamps. With further breakthroughs in key technologies, the light efficiency of LED may be further improved, greatly surpassing all current lighting The light effect of the light source has an attractive prospect in lighting. During the use of LED lamps, it is necessary to perform secondary light distribution on the dispersed light emitted by the optical lens to improve the light output efficiency of the LED and change the light distribution of the LED. The range near the axis, resulting in agglomerated dazzling light spots, giving people a dazzling feeling.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a lens for an LED lamp, through which the light emitted by the LED can be prevented from being too concentrated, and the light emitted by the LED can be soft and comfortable.

The technical solution adopted by the present invention to solve its technical problems is:

The lens for LED lamps is characterized in that it includes an integrally formed first lens body and a second lens body, the central axes of the first lens body and the second lens body coincide, wherein there is an LED in the first lens body A light source accommodating space, the LED light source accommodating space has an incident side surface and an incident bottom surface for the light to enter the first lens body, the first lens body has a refraction surface, and the refraction surface can project light from the incident side to the refraction surface refracted onto the light cup of the lamp; the second lens body has an internal space, which is symmetrical around the central axis of the second lens body, and the internal space has an internal reflection surface, which can project the light from the incident bottom surface to the Light from the internal reflective surface is reflected onto the lamp cup of the luminaire.

As a preferred embodiment of the present invention, the inner space of the second lens body is in the shape of a cone, and the first lens body is in the shape of an arc.

As a more preferred embodiment of the present invention, the apex of the inner space of the second lens body is located on the top surface of the first lens body.

As an improvement to the above-mentioned embodiments of the present invention, the depth of the LED light source accommodating space in the first lens body is greater than the height of the light source.

The accommodating space of the LED light source in the first lens body may be in the shape of a cylinder.

As a further improvement of the above-mentioned embodiments of the present invention, the incident bottom surface of the LED light source accommodating space is in a spherical shape.

The above-mentioned first lens body is provided with a wire outlet groove, and the wire outlet groove communicates with the accommodating space of the LED light source.

There are two wire outlet slots above, and the two wire outlet slots are oppositely arranged on the first lens body on both sides of the LED light source accommodating space.

The beneficial effects of the present invention are: the present invention organically combines the first lens body and the second lens body, and performs secondary light distribution on the scattered light emitted by the LED, so as to improve the light extraction efficiency of the LED and change the light distribution of the LED. The refracting surface of the first lens body and the internal reflection surface of the inner space of the second lens body make the light reflect to the light cup of the lamp and then emit light, so as to avoid the light emitted by the LED from being too concentrated, preventing the light from being too concentrated on the light source and causing glare. Make the light from LED soft and comfortable.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Fig. 1 is a schematic perspective view of the present invention;

Fig. 2 is a sectional view of the present invention;

Fig. 3 is a bottom view of the present invention.

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3, the preferred embodiments of the present invention are shown in the figures. The lens for LED lamps provided by this embodiment includes integrally formed first lens body 1 and second lens body 2. The first lens body 1 is located at the end of the second lens body 2, and the central axes of the first lens body 1 and the second lens body 2 coincide. At the bottom of the first lens body 1, there is a The convex edge 11 is provided with a mounting groove 111, and the present invention can be fixedly mounted above the LED light source through a fixing member passing through the mounting groove 111.

As shown in Figure 2, there is an LED light source accommodating space 12 in the first lens body 1, and the LED light source accommodating space 12 has an incident side surface 121 and an incident bottom surface 122 for the light to enter the first lens body 1, the first lens The body 1 has a refraction surface 13, which can refract the light projected on the refraction surface from the incident side to the light cup of the lamp.

The LED light source accommodating space 12 in the first lens body 1 can be cylindrical, and the first lens body 1 can adopt the shape of an arc, and the depth of the LED light source accommodating space 1 is greater than the height of the light source, so as to ensure that the LED light source is from the incident The light projected from the side to the refraction side can pass through the refraction side and then be completely refracted to the lamp cup of the lamp. Certainly, the LED light source accommodating space of the first lens body may also be in other polygonal cylinder shapes, and the first lens body may also be in the shape of a truncated cone, which will not be described in detail here.

There is an inner space 21 in the second lens body 2, and the inner space 21 is symmetrical around the central axis of the second lens body 2, and the inner space 21 has an inner reflection surface 211, and the inner reflection surface 211 can be a total reflection surface. The internal reflection surface 211 can reflect all the light projected from the incident bottom surface onto the internal reflection surface to the lamp cup of the lamp.

As shown in the figure, the inner space 21 of the second lens body 2 can be in the shape of a cone, the apex of the inner space 21 can be located on the top surface of the first lens body 1, and the incident bottom surface 122 of the LED light source accommodating space 12 can adopt a spherical surface shape to ensure that the direct light emitted by the LED is completely projected onto the internal reflective surface through the incident bottom surface of the convex lens switch. Of course, the apex of the inner space can also be located in other positions within the second lens body. Of course, the inner space can also be in other shapes, for example, the generatrix can be in the shape of an inwardly curved arc, a polygonal pyramid, and the like.

Two outlet grooves 14 are arranged on the first lens body 1, and the two outlet grooves 14 are oppositely arranged on the first lens body 1 on both sides of the LED light source accommodating space 12. 12 connected, the wires connected to the LED lamp pins can be set in the corresponding outlet slots. Of course, only one wire outlet slot may be provided, which will not be described in detail here.

The optical principle of the present invention is as follows: part of the light emitted by the LED enters the first lens body through the incident side of the first lens body, is refracted by the refracting surface of the first lens body, and then projected onto the lamp cup of the lamp, and finally passes through the lamp lamp. The other part of the light emitted by the LED enters the first lens body through the incident bottom surface and is projected onto the internal reflection surface of the second lens body. After being reflected by the internal reflection surface, it comes out from the second lens body and is projected onto the lamp cup. , and finally reflected by the light cup of the lamp. In this way, the present invention not only performs secondary light distribution on the scattered light emitted by the LED, so as to improve the light output efficiency of the LED, change the light distribution of the LED, but also through the refraction surface of the first lens body and the light distribution of the LED. The internal reflective surface of the second lens body internal space, especially the internal reflective surface of the second lens body, makes the light reflect to the light cup of the lamp and then emits light, so as to avoid the light emitted by the LED from being too concentrated, and to prevent the light from being directly emitted from the light source. The light emitted by the LED is soft and comfortable for the glare caused by too concentrated light.

Claims (5)

1. The lens used for LED lamps is characterized in that: it includes an integrally formed first lens body and a second lens body, the central axes of the first lens body and the second lens body coincide, wherein the first lens body is Arc body shape, the first lens body has a LED light source accommodation space, the LED light source accommodation space has incident side and incident bottom surface for light to enter the first lens body, the LED light source accommodation space in the first lens body It is in the shape of a cylinder, and the incident bottom surface is in a spherical shape protruding outward. The first lens body has a refracting surface, which can refract the light projected from the incident side onto the refracting surface onto the lamp cup of the lamp; the second lens body There is an internal space, which is symmetrical around the central axis of the second lens body, and the internal space is in the shape of a cone or the generatrix is in the shape of an inwardly curved arc, and the internal space has an internal reflection surface, and the internal reflection surface can The light projected from the incident bottom surface to the internal reflection surface is reflected on the light cup of the lamp. 2. The lens for LED lamps according to claim 1, wherein the apex of the inner space of the second lens body is located on the top surface of the first lens body. 3. The lens for LED lamps according to claim 1, characterized in that the depth of the LED light source accommodating space in the first lens body is greater than the height of the light source. 4. The lens for LED lamps according to claim 1, wherein the first lens body is provided with a wire slot, and the wire slot communicates with the LED light source accommodating space. 5. The lens for LED lamps according to claim 4, wherein there are two outlet slots, and the two outlet slots are oppositely arranged on the first lens body on both sides of the LED light source accommodation space.

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