CN205480832U - A lens for arc -shaped lampshade's lighting device - Google Patents

Abstract

The utility model discloses a lens used for an illumination device of an arc-shaped lampshade. The bottom surface of the lens is provided with an annular groove for accommodating lamp beads, the inner wall of the annular groove is a first refracting surface, and the upper surface of the lens is provided with There is a ring-shaped convex second refraction surface. The light emitted by the lamp bead passes through the first refraction surface and the second refraction surface in sequence, and then exits. The beam angle of the lens ranges from 150° to 175°. The lens of the utility model is applied to the lighting device of the arc-shaped lampshade. When applied, the lamp bead is placed in the annular groove, and the light emitted by the lamp bead is refracted by the first refraction surface and the second refraction surface of the lens and then diffused, which can Increase the diffusion angle of the light, and control the beam angle of the lens between 150° and 175° to ensure uniform brightness distribution of the arc lampshade, and reduce the diameter range of the light source, reduce the diameter of the lens and the area of the light source board , to reduce the production cost of the lighting device.

Description

Lens for lighting device of arc lampshade

technical field

The utility model relates to the field of lenses, in particular to a lens used for an illumination device of an arc lampshade.

Background technique

The existing lighting devices with arc-shaped lampshades on the market include ceiling lamps. The light emitted by the lamp beads of the ceiling lamps is emitted through the arc-shaped lampshade, but the brightness of the arc-shaped lampshade will be uneven due to the insufficient light emitting angle of the lamp beads. In order to solve this problem, a lighting device with a lens appears on the market, and the light generated by the LED lamp beads is diffused through the lens.

Although the uniformity of light emission of the lighting device can be improved through the lens, in order to achieve this purpose, the LED lamp bead must be arranged near the edge of the arc-shaped lampshade. Correspondingly, the diameter of the light source board and the lens must be larger, resulting in the The cost of the light source plate and the lens is relatively high, so it is necessary to design a lens that can achieve uniform light emission and save the manufacturing cost of the lighting device.

Utility model content

The technical problem to be solved by the utility model is to provide a lens used for the lighting device of the arc lampshade, the lens is set in a concave-convex shape, the light is diffused after being refracted twice by the lens, and the range of the lens beam angle is controlled. The diameter of the lens can be reduced, the amount of lamp beads used and the area of the light source board can be reduced, and the production cost of the lighting device can be reduced.

In order to solve the above-mentioned technical problems, the utility model provides a lens used for the lighting device of the arc-shaped lampshade, the bottom surface of the lens is provided with an annular groove for accommodating lamp beads, and the inner wall of the annular groove is the first refraction surface , The upper surface of the lens is provided with a ring-shaped convex second refraction surface. The light emitted by the lamp bead passes through the first refraction surface and the second refraction surface in sequence, and then exits. The beam angle of the lens ranges from 150° to 175°.

As a preferred embodiment of the lens of the present invention, the outer diameter of the lens is ≤80mm.

As a preferred embodiment of the lens of the present invention, the radial section of the first refracting surface is two symmetrical first arcs, the radial section of the second refracting surface is two symmetrical second arcs, Both the first arc and the second arc are convex structures, and the vertices of the first arc and the second arc on the same section are located on the same vertical line.

As a preferred embodiment of the lens of the present invention, the gap between the first arc and the second arc in the same section becomes gradually larger from the top down.

As a preferred embodiment of the lens of the present invention, the height of the lens is ≤6mm.

As a preferred embodiment of the lens of the present invention, a recessed installation platform is provided at the center of the lens, the second refraction surface is arranged around the installation platform, and a positioning hole is provided on the installation platform.

As a preferred embodiment of the lens of the present invention, the installation platform and the lens are integrally structured.

As a preferred embodiment of the lens of the present invention, the second refracting surface is a frosted surface.

Implement the embodiment of the present utility model, have following beneficial effect:

The lens of the utility model is applied to a lighting device with an arc-shaped lampshade. When applied, the lamp bead is placed in the annular groove, and the light emitted by the lamp bead is refracted by the first refraction surface and the second refraction surface of the lens and then diffused. , increasing the diffusion angle of light can prevent dark areas during lighting. The utility model controls the beam angle of the lens between 150° and 175°, so that when the lens is in a small diameter range, it can also ensure that the brightness distribution of the arc lampshade is uniform, thereby reducing the amount of lamp beads and the light source board. area, greatly reducing the production cost of the lighting device.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model lens;

Fig. 2 is the structural representation of the utility model lens bottom surface;

Fig. 3 is a sectional view of the utility model lens along the radial direction;

Fig. 4 is a partial enlarged view of place A in Fig. 3;

Fig. 5 is a light distribution curve diagram of the lens of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. It is only a statement that the orientation words such as up, down, left, right, front, back, inside, and outside appearing or about to appear in the text of the utility model are only based on the accompanying drawings of the utility model, and it is not a reference to the utility model. New specific restrictions.

Referring to accompanying drawings 1 to 5, the utility model discloses a lens used for a lighting device of an arc-shaped lampshade, which is applied to a ceiling lamp. The bottom surface of the lens 1 is provided with an annular groove 2 for accommodating lamp beads. The inner wall of the annular groove 2 is the first refraction surface 11, and the upper surface of the lens 1 is provided with an annular convex second refraction surface 12, and the light emitted by the lamp bead passes through the first refraction surface 11 and the second refraction surface in sequence 12 shots later. Combined with the annular structure of the first refraction surface 11 and the second refraction surface 12 , the lens 1 has an overall ring shape. The second refraction surface 12 is preferably a frosted surface, and the surface layer of the lens 1, that is, the second refraction surface 12, is frosted to make the lens emit more uniform light, eliminate chromatic aberration, and improve the quality of illumination.

The lens of the utility model is suitable for lamp beads arranged in a circle. When installing, the lamp beads are placed in the annular groove 2 and located at the center line of the annular groove. The lamp beads emit light in the annular groove 2 and pass through the first ring groove. A refraction surface 11 is injected into the lens 1, and after being transmitted by the lens 1, it is emitted from the second refraction surface 12. Its movement direction is shown by arrow B in FIG.

Further, the center of the lens 1 is provided with an indented installation platform 3 , the second refraction surface 12 is arranged around the installation platform 3 , and the installation platform 3 is provided with a positioning hole 31 . The lens 1 of the present utility model is connected with the light source board and the lamp holder through the installation platform 3, specifically, it can be connected through connecting parts such as screws. In order to prevent the installation platform 3 from affecting the light direction of the lamp beads, the installation platform 3 is designed to be In order to simplify the structure and avoid the influence of other connectors, the installation platform 3 and the lens 1 described in the utility model have an integrated structure, which simplifies the installation steps, has a simple structure, and does not block the transmission of light.

It should be noted that the outer diameter of the existing ceiling lamps is generally around or within 350mm (for example, 250mm to 400mm). In order to prevent the occurrence of dark areas, the lamp beads generally need to be placed near the edge of the lampshade. Correspondingly, In order to diffuse the light, the lens needs to cover the lamp beads. At this time, the size of the lens is relatively large, at least 100 mm or more, which will inevitably lead to waste of resources. In order to solve this problem, the beam angle range of the lens 1 of the present invention is 150 ° to 175°, controlling the beam angle of the lens 1 within this range can achieve a uniform brightness distribution of the arc lampshade in the small diameter range of the lens, and the outer diameter of the lens 1 is preferably ≤80mm. At this time, the lens The diameter is greatly reduced, the diameter of the lamp bead arrangement and the area of the light source board can be reduced, which can reduce the production cost of the lighting device, and the lens will not produce total reflection, and can also solve the problem of dark areas in lighting.

As a preferred solution, the height of the lens 1 is less than or equal to 6 mm, corresponding to the diameter of the lens 1 and the range of beam angles. The inventors have found that the height of the lens can be selected within 6 mm to minimize the cost of the lighting device, and will not produce a complete reflections and dark areas.

Referring to Fig. 3 and Fig. 4, the radial section of the first refraction surface 11 is two symmetrical first arcs 110, and the radial section of the second refraction surface 12 is two symmetrical second arcs 120 , the first arc 110 and the second arc 120 are convex structures, and the vertices of the first arc 110 and the second arc 120 in the same section are located on the same vertical line. Set the central vertices of the first arc 110 and the second arc 120 on the same vertical line. According to the design requirements, the part close to the center of the lens 1 is relatively short, and the shorter side is opposite to the same part of the other side. The vertical line is symmetrical on the left and right, the light from the lamp bead can be emitted more evenly, and the gap between the first arc 110 and the second arc 120 in the same section gradually becomes larger from the top downward, that is, the lens 1 gradually expands from the top to both sides. Thicker, at this time, the divergence angle of the light at the edge of the lens is larger, and the divergence angle near the top of the lens is relatively small, this design can expand the divergence angle of the light, and will not produce total reflection, ensuring the brightness of the arc lampshade evenly distributed.

The lens of the utility model is applied to a lighting device with an arc-shaped lampshade. The ratio of the maximum diameter of the arc-shaped lampshade to its lens can reach about 4 times, and the arrangement diameter of the lamp beads is greatly reduced, which can save the number of lamp beads and the cost of the light source board. Area, especially for mass production can greatly save processing costs.

When the lens 1 is applied to the lighting device, it is arranged in the center of the base, and the position of the base other than the lens 1 is relatively large. At this time, the driving power can be set in a position other than the lens 1 in the base, and the driving power will not affect the light direction, and Easy to install.

The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made, these improvements and modifications It is also regarded as the protection scope of the present utility model.

Claims (8)

1. A lens for an illuminating device with a curved lampshade, characterized in that the bottom surface of the lens is provided with an annular groove for accommodating lamp beads, the inner wall of the annular groove is the first refracting surface, and the upper surface of the lens There is a second refraction surface with ring-shaped protrusions. The light emitted by the lamp bead passes through the first refraction surface and the second refraction surface in sequence, and then exits. The beam angle of the lens ranges from 150° to 175°. 2. The lens according to claim 1, characterized in that, the outer diameter of the lens is ≤80mm. 3. The lens according to claim 1, wherein the radial section of the first refracting surface is two symmetrical first arcs, and the radial section of the second refracting surface is two symmetrical The second arc, the first arc and the second arc are convex structures, and the vertices of the first arc and the second arc on the same section are located on the same vertical line. 4 . The lens according to claim 3 , wherein the gap between the first arc and the second arc in the same section gradually becomes larger from the top down. 5. The lens according to any one of claims 1 to 4, characterized in that the height of the lens is ≤6 mm. 6 . The lens according to claim 1 , wherein a recessed installation platform is provided at the center of the lens, the second refraction surface is arranged around the installation platform, and a positioning hole is provided on the installation platform. 7. The lens according to claim 6, wherein the installation platform and the lens are integrated. 8. The lens according to claim 1, wherein the second refracting surface is a frosted surface.