CN204678097U - Mirror lens formula LED - Google Patents

Abstract

A reflective lens type LED lamp, comprising an LED light source, a lens, a substrate, and a lamp head body, the LED light source is arranged on the substrate, the substrate is fixed on the top of the lamp head body, the lens is arranged above the LED light source, The middle part of the top surface of the lens is recessed toward the substrate to form a first reflective surface, the top surface of the lens surrounds the first reflective surface to form a light-emitting surface, the outer surface of the lens forms a second reflective surface, and the bottom surface of the lens is facing the LED light source The light emitted by the LED light source is mostly refracted toward the first reflective surface after entering the incident surface, and most of the light emitted to the first reflective surface is mostly directed toward the second reflective surface by the first reflective surface. The reflective surface is reflective, the second reflective surface should be set on the first reflective surface, the light incident on the second reflective surface is reflected by the second reflective surface toward the light-emitting surface, and most of the light is refracted by the light-emitting surface and then goes outward shoot out. The reflective lens type LED lamp has the advantage of low cost.

Description

Reflective lens LED lights

technical field

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

Background technique

In recent years, due to the rapid development of the LED industry, LED lamps have gradually replaced traditional lighting fixtures, especially LED spotlights. A kind of LED spotlight in the prior art usually solves the problem of uneven light rays by setting a lens inside the spotlight. For LED spotlights with this structure, the thickness of the lens is generally thicker. For example, the date of authorization announcement is February 06, 2013, and the Chinese utility model patent No. 201220160640.5 discloses a LED spotlight with a new type of lens. The spotlight includes a base, a radiator fixed on the base, and a The aluminum substrate in the radiator, the LED light beads arranged on the aluminum substrate, a lens and a lens cover fixedly connected with the radiator, the lens includes a body and a horn-shaped extension extending from the body to one side, the body is in the shape of Ring-shaped, and form a second step downward from the upper end surface, the section of the extension part toward the body is larger than the end away from the body, and smaller than the body, the extension part of the lens is placed in the accommodating space of the radiator, and the lens body is under the The end face is placed on the upper end face of the radiator, and the LED lamp beads are located in the extension of the lens.

This kind of traditional LED spotlight lens mainly realizes the refraction of light by increasing the area of the side surface of the lens to meet the light distribution requirements. Therefore, the overall height of this type of lens is high, and it takes up a lot of space in the lamp cup.

Utility model content

In view of this, it is necessary to provide a reflective lens type LED lamp with high light utilization efficiency and small thickness.

The technical scheme adopted by the utility model is: a reflective lens type LED lamp, comprising an LED light source, a lens, a base plate, and a lamp head body, the LED light source is arranged on the base plate, the base plate is fixed on the top of the lamp head body, and the lens Located above the LED light source, the middle part of the top surface of the lens is recessed toward the substrate to form a first reflective surface, the top surface of the lens surrounds the first reflective surface to form a light-emitting surface, and the outer surface of the lens forms a second reflective surface, The bottom surface of the lens is the incident surface facing the LED light source, and most of the light emitted by the LED light source enters the incident surface and is refracted toward the first reflecting surface, and most of the light incident on the first reflecting surface is mostly The first reflective surface reflects toward the second reflective surface, and the second reflective surface is set corresponding to the first reflective surface. Most of the light is emitted outward after being refracted by the light emitting surface.

Compared with the prior art: the reflective lens type LED lamp of the utility model sets the first reflective surface of the lens, the second reflective surface reflective surface, the light-emitting surface and the incident surface, and most of the light emitted by the LED light source enters the incident surface. Refracted towards the first reflective surface, most of the light directed towards the first reflective surface is mostly reflected by the first reflective surface towards the second reflective surface, and the light directed towards the second reflective surface is reflected by the second reflective surface The surface is reflected toward the light-emitting surface, and most of the light is emitted outward after being refracted by the light-emitting surface. In this way, the light emitted by the LED light source is reflected twice by the first reflective surface and the second reflective surface and then emitted from the top surface, which can reduce the height of the lens and reduce the cost, so that the reflective lens type LED lamp has the advantage of lower cost .

Description of drawings

Fig. 1 is a schematic cross-sectional view of the first embodiment of the utility model after assembly of the reflective lens type LED lamp.

Fig. 2 is a schematic perspective view of the assembled reflective lens LED lamp shown in Fig. 1 .

Fig. 3 is a schematic diagram of the optical path of the lens in the reflective lens type LED lamp shown in Fig. 1 .

Explanation of reference signs:

100 reflective lens LED lights

10 Substrate

20 LED light source

30 lens

31 The first reflective surface

32 light emitting surface

33 Second reflective surface

34 incident surface

Detailed ways

The utility model is elaborated below by specific embodiment:

1 is a schematic cross-sectional view of a reflective lens-type LED lamp 100 assembled in the first embodiment of the present invention. The reflective lens-type LED lamp 100 includes a substrate 10, an LED light source 20, and a lens 30. These LED light sources 20 are arranged on the substrate 10. , the substrate 10 is fixed on the top of the lamp head body (not shown in the figure), the lens 30 is arranged directly above these LED light sources 20 and is spaced a small distance from these LED light sources, and a plurality of LED light sources 20 are arranged in the shape of a ring. on the substrate 10.

Please refer to FIGS. 1 to 3 , the lens 30 has a rounded frustum shape as a whole. The middle portion of the top surface of the lens 30 is recessed toward the substrate 10 to form a first reflective surface 31 , and the top surface of the lens 30 surrounds the first reflective surface 31 to form a light emitting surface 32 . The outer surface of the lens 30 forms a second reflective surface 33 , and the bottom surface of the lens 30 faces the LED light source 20 to form an incident surface 34 . The light emitting surface 32 is an annular planar structure. The light emitting surface 32 is substantially parallel to the incident surface 34 . Most of the light emitted by these LED light sources 20 enters the incident surface 34 and is mostly refracted toward the first reflective surface 31, and most of the light emitted to the first reflective surface 31 is mostly directed toward the second reflective surface 31 by the first reflective surface 31. reflective surface 33 reflection; the second reflective surface 33 is set corresponding to the first reflective surface 31, and the light directed to the second reflective surface 33 is reflected by the second reflective surface 33 toward the light-emitting surface 32 and the light passes through the light-emitting surface After 32 refraction, most of them are shot outward.

Please refer to FIG. 1 to FIG. 3, the first reflective surface 31 is an inverted conical structure, and the projected area of the first reflective surface 31 on the substrate 10 is larger than the area of the area where the LED light source 20 is located on the substrate 10, thereby covering all LED light source (as shown in Figure 1). The portion between the middle part and the edge of the first reflective surface 31 protrudes toward the direction away from the second reflective surface 33 to form an arc structure (as shown in FIG. 1 ), which can emit light from the LED light source. More light is reflected toward the second reflective surface 33 . A reflective layer (not shown) may also be provided on the first reflective surface 31, and the reflective layer is used to reflect light toward the second reflective surface 33; the reflective layer may be a coating or a reflective silver layer, and the reflective layer The setting can make the first reflective surface 31 reflect light more effectively. The lens 30 has a rounded truncated structure, and the area of the incident surface 34 is larger than the area of the area where the LED light source 20 is located on the substrate 10 . The outer diameter of the second reflective surface 33 gradually increases in the direction away from the substrate 10 . The middle of the second reflective surface 33 protrudes away from the first reflective surface 31 to form an arc surface, and the arc surface can reflect more light toward the light-emitting surface 32 . The light emitting surface 32 is respectively connected to top ends of the first reflecting surface 31 and the second reflecting surface 33 , and the light emitting surface 32 is substantially parallel to the incident surface 34 . The outer diameter of the light emitting surface 32 is larger than the outer diameter of the incident surface 34 . The bottom of the second reflective surface 33 is connected to the periphery of the incident surface 34 . The top of the second reflective surface 33 is connected to the middle of the bottom of the light-emitting surface 32 , so that the outer diameter of the light-emitting surface 32 is larger than that of the second reflective surface 33 , thereby increasing the light-emitting efficiency. The incident surface 34 is concaved away from the LED light sources 20 to form an arc surface, so that the incident surface 34 refracts more light emitted by the LED light sources 20 toward the first reflective surface 31 .

During operation, the light emitted by these LED light sources 20 is refracted into the lens 30 through the incident surface 34 of the lens 30, and this part of the light is fully radiated to the side surface of the lens 30 through the first reflective surface 31 on the lens 30, and then again The total reflection is emitted from the light emitting surface 32 of the lens 30 . Compared with the traditional refraction-reflection lens, the light near the direction perpendicular to the light-emitting surface is no longer refracted only through the upper and lower sides of the lens, so the lens 30 overcomes the disadvantage of poor light control ability of the refraction surface, and after reasonable design The free curved surface of the upper surface of the lens 30 gathers the diverging light, which saves the area of the side surface of the lens 30 , thereby reducing the overall height of the lens 30 .

In summary, the reflective lens type LED lamp 100 of the present invention sets the first reflective surface 31, the second reflective surface 33, the light emitting surface 32 and the incident surface 34 on the lens 30, so that the light emitted by these LED light sources 20 passes through After the reflection and refraction of the first reflective surface 31 and the second reflective surface 33, the top, side wall and bottom of the bulb shell are illuminated, so that the reflective lens type LED lamp 100 achieves the effect of omnidirectional and uniform light emission. At the same time, the lens 30 overcomes the shortcoming of the traditional lens that has a limited light-gathering ability when facing a large-area light source at the center of the lens, and can greatly increase the peak light intensity while reducing the beam angle. Moreover, compared with traditional lenses, the lens 30 has a smaller height, is more economical, and has the beneficial effect of lower cost.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present utility model shall include Within the protection scope of the utility model.

Claims (10)

1. a mirror lens formula LED, comprise LED light source, lens, substrate, body, described LED light source is arranged on the substrate, this substrate is fixed on the top of this body, the top of described LED light source is located at by these lens, it is characterized in that: the middle part of this lens end face forms the first reflecting surface towards this base plate recess, this lens end face forms exiting surface around this first reflecting surface, the lateral surface of these lens forms the second reflecting surface, the bottom surface of these lens is just to the plane of incidence of LED light source, after the light that described LED light source sends enters this plane of incidence, major part is reflected by towards this first reflecting surface, the most of light major part of this first reflecting surface of directive by this first reflecting surface towards this second reflective surface, this second reflecting surface is to arranging by the first reflecting surface, the light of this second reflecting surface of directive to be reflected towards this exiting surface by this second reflecting surface and makes light major part outwards injection after the refraction of this exiting surface.

2. mirror lens formula LED according to claim 1, it is characterized in that: this first reflecting surface is turbination structure, the area that this first reflecting surface projects on the substrate is greater than the area of LED light source region on this substrate.

3. mirror lens formula LED according to claim 2, is characterized in that: the position between the middle part of this first reflecting surface and edge protrudes out formation globoidal structure towards the direction away from this second reflecting surface.

4. mirror lens formula LED according to claim 1, is characterized in that: this first reflecting surface is provided with reflector layer, and this reflector layer is used for light towards this second reflective surface.

5. mirror lens formula LED according to claim 1, it is characterized in that: these lens are inverted round stage structure, the area of this plane of incidence is greater than the area of LED light source region on this substrate, and this second reflecting surface is increasing gradually away from the external diameter on the direction of this substrate.

6. mirror lens formula LED according to claim 5, is characterized in that: the medium position of this second reflecting surface protrudes out formation cambered surface towards the direction away from this first reflecting surface.

7. mirror lens formula LED according to claim 5, it is characterized in that: this exiting surface connects one end of this first reflecting surface and this second reflecting surface respectively, this exiting surface is roughly parallel with this plane of incidence.

8. mirror lens formula LED according to claim 1, is characterized in that: the external diameter of this exiting surface is greater than the external diameter of this plane of incidence.

9. mirror lens formula LED according to claim 1, is characterized in that: this plane of incidence is recessed to form cambered surface towards the direction away from this LED light source, so that more light that this LED light source sends by this plane of incidence reflect towards this first reflecting surface.

10. mirror lens formula LED according to claim 1, is characterized in that: comprise multiple LED light source, described LED light source be circular setting on the substrate.