CN216897144U - Lens structure and blackboard lamp and classroom lighting system who uses thereof - Google Patents

Abstract

The utility model provides a lens structure, a blackboard lamp and a classroom lighting system using the lens structure. The lens structure includes: the bottom of the lens body is inwards sunken to form an optical cavity for installing a light source in the optical cavity, and light rays emitted by the light source irradiate on a target plane through the lens body; a first incident surface, a total reflection surface and a first exit surface which are connected in sequence are arranged on the far target plane side of the lens body, so that light rays are incident through the first incident surface, are totally reflected through the total reflection surface and exit through the first exit surface to irradiate a first part of a target plane; and a second incident surface and a second emergent surface which are mutually connected are arranged on the side of the lens body close to the target plane, so that light rays are emitted through the second emergent surface to irradiate a second part of the target plane after being incident through the second incident surface. The utility model can improve the light energy utilization rate of the light source and the illumination uniformity of the target plane, and reduce the cost and the energy consumption of the lamp.

Description

Lens structure and blackboard lamp and classroom lighting system applying same

Technical Field

The utility model relates to the technical field of LED (light emitting diode) illumination, in particular to a lens structure and a blackboard lamp and a classroom illumination system applying the lens structure.

Background

With the increasing importance of the education industry on the quality of the light environment of the classroom of the school, professional LED classroom lamps and LED blackboard lamps are produced. At present, the arrangement scheme of the common lamps for classrooms is a 9+3 scheme, namely 9 classroom lamps are arranged in a 3X3 mode, and 3 additional blackboard lamps are arranged side by side. However, such a scheme has the defects of high cost, low light energy utilization rate and large energy consumption. Therefore, a technical scheme is needed to be provided, so that the classroom illumination cost is reduced, the light energy utilization rate is improved, and energy is saved under the condition that the requirements of GB7793-2010 on the average illumination and the illumination uniformity of the blackboard surface in classroom illumination and sanitation standards of primary and secondary schools are met.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, the present invention is to provide a lens structure and a blackboard lamp and a classroom lighting system to which the same is applied.

To achieve the above and other related objects, a first aspect of the present invention provides a lens structure comprising: the bottom of the lens body is inwards sunken to form an optical cavity for installing a light source in the optical cavity, and light rays emitted by the light source irradiate on a target plane through the lens body; a first incident surface, a total reflection surface and a first exit surface which are connected in sequence are arranged at the far target plane side of the lens body, so that light rays are incident through the first incident surface, are totally reflected through the total reflection surface and exit through the first exit surface to irradiate a first part of the target plane; and a second incident surface and a second emergent surface which are mutually connected are arranged on the side of the lens body close to the target plane, so that light rays are emitted through the second emergent surface to irradiate a second part of the target plane after being incident through the second incident surface.

In a preferred embodiment of the first aspect of the present invention, the lens body includes: a third incident surface; the first incident surface, the third incident surface and the second incident surface are sequentially connected to form the inner surface of the optical cavity, and light is emitted through the first emergent surface to irradiate the first part of the target plane after being incident through the third incident surface.

In a preferred embodiment of the first aspect of the present invention, the first incident surface, the total reflection surface, the first exit surface, the second incident surface, and the third incident surface are sequentially connected end to form the closed lens body.

In a preferred embodiment of the first aspect of the present invention, the second incident surface is a first free-form surface; the second emergent surface is a second free-form surface.

In a preferred embodiment of the first aspect of the present invention, the lens body is an injection molded structure.

In a preferred embodiment of the first aspect of the present invention, a junction of the third incident surface and the second incident surface is located on a bottom midperpendicular of the lens body.

To achieve the above and other related objects, a second aspect of the present invention provides a blackboard lamp including: a substrate; the LED chip is connected with the substrate; the lens structure covers the LED chip so that the chip is positioned in the light cavity.

In a preferred embodiment of the second aspect of the present invention, the blackboard lamp includes: and the frosted plate is arranged at the periphery of the lens structure to disperse the emergent light beams.

In a preferred embodiment of the second aspect of the present invention, the blackboard lamp includes: the LED chips are arranged on the substrate side by side; and the lens structures are arranged in one-to-one correspondence with the LED chips.

To achieve the above and other related objects, a third aspect of the present invention provides a classroom lighting system including: the two blackboard lamps are symmetrically arranged on two sides of the top of the blackboard.

As described above, the lens structure and the blackboard lamp and classroom lighting system using the same according to the present invention have the following advantages: through the optical design of the lens structure, partial light emitted by the light source irradiates the lower half part of the target object through the first incident surface, the total reflection surface and the first emergent surface, and partial light irradiates the upper half part of the target object through the second incident surface and the second emergent surface, so that the light energy utilization rate of the light source and the illumination uniformity of a target plane are improved, lamps required by an application scene are reduced, and the lamp cost and the energy consumption are reduced; further, the lens is produced by injection molding of a mold, and the product consistency is good; the lamp adopts the frosted plate to emit light, the light visual effect is soft and not dazzling, and the user experience is good.

Drawings

Fig. 1 is a schematic diagram of a lens structure according to an embodiment of the utility model.

Fig. 2 is a schematic structural diagram of a lens body according to an embodiment of the utility model.

Fig. 3 and fig. 4 are schematic perspective views illustrating a lens structure according to an embodiment of the utility model.

Fig. 5 and 6 are schematic views showing another lens structure according to an embodiment of the present invention.

Fig. 7 and 8 are schematic structural views illustrating a blackboard lamp according to an embodiment of the present invention.

Fig. 9 and 10 are schematic structural diagrams illustrating a classroom lighting system according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, etc. shown in the drawings and attached to the present specification are only used for matching the disclosure and are not used for limiting the practical limitations of the present invention, so that the present invention has no technical significance, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, without affecting the efficacy and the purpose of the present invention, shall fall within the scope of the technical disclosure. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present invention is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "above," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," "retained," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," and/or "comprising," when used in this specification, specify the presence of stated features, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions or operations are inherently mutually exclusive in some way.

The utility model provides a lens structure, a blackboard lamp and a classroom lighting system applying the lens structure, and aims to solve the technical problems of high classroom lighting cost, low light energy utilization rate and high energy consumption in the prior art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention are further described in detail by the following embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

As shown in fig. 1, an embodiment of the utility model provides a schematic view of a lens structure, which includes: the bottom of the lens body 11 is recessed inwards to form an optical cavity 111 for installing the light source 12 in the optical cavity 111, and light emitted by the light source 12 irradiates the target plane 13 through the lens body 11.

A first incident surface 112, a total reflection surface 113 and a first exit surface 114 which are connected in sequence are arranged at the far target plane side of the lens body 11, so that light rays are incident through the first incident surface 112, are totally reflected through the total reflection surface 113, and exit through the first exit surface 114 to irradiate a first part 131 of the target plane; the lens body 11 has a second incident surface 115 and a second emergent surface 116 on a side close to the target plane, which are connected to each other, so that the light beam is incident through the second incident surface 115 and then exits through the second emergent surface 116 to irradiate a second portion 132 of the target plane 13.

Optionally, the lens body 11 includes, but is not limited to, any one or a combination of a silicone lens, a PMMA lens (polymethyl methacrylate, i.e., acryl), a PC lens (Polycarbonate), a glass lens, and the like. The PMMA lens is preferable, the manufacturing cost is low, the production efficiency is high, and the popularization and the use of products are facilitated. The light source 12 is preferably an LED chip, which has the advantages of energy saving, environmental protection, and high light emitting efficiency, and is particularly suitable for the present invention.

The lens body 11 includes, but is not limited to, a compression molding structure, an injection molding structure, or a combination molding structure, an integral molding structure, etc. The injection molding and integral molding structure is preferred, and the injection molding and integral molding structure has the advantages of good product consistency and mature production process, and is particularly suitable for the utility model.

The unique optical design of the lens structure in the embodiment enables most light emitted by the light source to irradiate the target plane, so that the utilization rate of light energy and the illumination uniformity of the target plane can be effectively improved. Under the condition that the target plane is a blackboard plane, the first part 131 of the target plane is the lower half part of the blackboard, the second part 132 of the target plane is the lower half part of the blackboard, most of light rays passing through the first incident surface 112, the total reflection surface 113 and the first emergent surface 114 can be projected to the lower half part of the blackboard, and the illuminance of the lower half part of the blackboard is improved so as to improve the illuminance uniformity of the blackboard; most of the light passing through the second incident surface 115 and the second exit surface 116 provides light intensity for the upper half of the blackboard and appropriately complements the illuminance of the lower half of the blackboard, so as to achieve higher uniformity of the illuminance of the blackboard surface.

Preferably, the light source 12 is disposed on the bottom middle vertical line of the lens body 11, half of the light emitted from the light source 12 will be irradiated on the first portion 131 of the target plane through the first incident surface 112, the total reflection surface 113 and the first exit surface 114, and the other half of the light emitted from the light source 12 will be irradiated on the second portion 132 of the target plane 13 through the second incident surface 115 and the second exit surface 116, so as to improve the illuminance uniformity of the target plane.

In a preferred embodiment of the present embodiment, the lens body 11 includes a third incident surface 117; the first incident surface 112, the third incident surface 117 and the second incident surface 115 are sequentially connected to form an inner surface of the optical cavity 111, and after being incident through the third incident surface 117, the light is emitted through the first emitting surface 114 to irradiate the first portion 131 of the target plane 13. In this embodiment, the light path from the first incident surface 112, the total reflection surface 113 and the first exit surface 114 to the target plane is long, and the light energy loss is large, so that the illumination of the first portion 131 of the target plane 13 is supplemented by the third incident surface 117, and the illuminance uniformity of the target plane can be further improved.

In a preferred embodiment of this embodiment, the second incident surface is a first free-form surface; the second emergent surface is a second free-form surface. Compared with the traditional spherical optics, the free-form surface can be formed by randomly combining asymmetric, irregular and complex free-form surfaces, and by using the very compact design of the free-form surface, smaller space envelope can be realized, so that the weight is lighter; the number of optical surfaces can be reduced and thus the yield increased, and is particularly suitable for the present invention.

Fig. 2 is an enlarged schematic structural view of the lens body 11 in fig. 1. In the preferred embodiment of the present invention, the first incident surface 112, the total reflection surface 113, the first exit surface 114, the second exit surface 116, the second incident surface 115 and the third incident surface 117 are sequentially connected end to form the closed lens body 11. The junction of the third incident surface 117 and the second incident surface 115 is located on the bottom perpendicular bisector of the lens body 11, and the light source 12 is also located on the bottom perpendicular bisector of the lens body 11, which is favorable for improving the illuminance uniformity of the light source to the target plane.

For easy understanding, fig. 3 and fig. 4 are schematic perspective views of the lens structure according to the present embodiment, the lens structure includes a lens body 11, a surface of the lens body 11 is recessed inward to form an optical cavity 111, and a light source 12 is disposed in the optical cavity 111, and light emitted by the light source is refracted or reflected by the lens body 11 and then uniformly irradiates a target plane on one side.

For example, as shown in fig. 5 and fig. 6, an embodiment of the utility model provides another lens structure, where fig. 5 is a side cross-sectional view of the lens structure, and fig. 6 is a top view of the lens structure. The distance a between the light source 12 and the first incident surface 112 is 0.36mm, the distance b between the light source 12 and the second incident surface 115 is 3.24mm, and the distance c between the light source 12 and the farthest ends of the two sides of the lens body 11 is 7.97 mm. It should be noted that this example is only an example, and the specific lens size design can be adjusted according to the size of the light source, the size of the target plane, and the like, which is not limited by the utility model.

As shown in fig. 7 and 8, an embodiment of the utility model provides a structural schematic diagram of a blackboard lamp, wherein fig. 7 is a top perspective view, and fig. 8 is a side perspective view. The arrows in fig. 7 point to the blackboard surface. The blackboard lamp includes a substrate 21; an LED chip 22 connected to the substrate 21; the lens structure 23 is disposed over the LED chip 22 to locate the chip in the light cavity 111.

In some examples, the substrate 21 may optionally have a rigid substrate or a flexible substrate material; or paper base, glass fiber cloth base, composite base (CEM series), laminated multilayer board base, special material base (ceramic, metal core base, etc.), etc. can be selected. The aluminum substrate is preferred, the operation temperature of the product can be reduced, the power density and the reliability of the product are improved, the service life of the product is prolonged, the volume of the product is reduced, the hardware and assembly cost are reduced, and the aluminum substrate is particularly suitable for the utility model.

In the preferred embodiment of the present embodiment, the blackboard lamp includes a frosted plate (light emitting plate) 24 disposed at the periphery of the lens structure to disperse the emitted light beam. The frosted plate with specific transmittance and haze enables the light emitting surface to emit light softly and not to be dazzled, and the requirement of blue light harming RG0 is met. Preferably, the blackboard lamp is a frosted board with 90% transmittance and 33% haze, and eye health of a user is protected under the condition of improving light energy utilization rate.

In the preferred embodiment of the present invention, the blackboard lamp includes a lamp body section 25, which is a solid straight bar formed by plastic working and having a certain cross-sectional shape and size. The method comprises the following optional steps: hot rolled, cold bent, cold rolled, cold drawn, extruded, forged, hot bent, welded, and special rolled profiles, etc.

In some examples, the blackboard light includes a plurality of LED chips disposed side-by-side on the substrate; the LED chip structure also comprises a plurality of lens structures which are arranged corresponding to the LED chips one to one. For example, in a blackboard lamp with a total length of 1.8m, 64 LED chips are arranged side by side on a substrate, and 64 lenses are correspondingly mounted.

As shown in fig. 9 and fig. 10, an embodiment of the utility model provides a structural schematic diagram of a classroom lighting system, wherein fig. 9 is a front view, and fig. 10 is a side view. The lighting system includes: the two blackboard lamps 31 are symmetrically arranged at two sides of the top of the blackboard 32. Compared with the existing lamp arrangement scheme for classrooms: the 9+3 scheme is that 9 classroom lamps are arranged in a 3X3 mode, and 3 additional blackboard lamps are arranged side by side, in the embodiment, two blackboard lamps replace three blackboard lamps, the power of a single lamp is unchanged, energy consumption is reduced, and the cost of the lamp and the installation cost are reduced.

In some examples, the angle between the bottom of the lens structure in the blackboard lamp 31 and the horizontal plane is 18.20 °, the vertical distance e between the blackboard lamp 31 and the top of the blackboard 32 is 35cm, the spacing distance f between the blackboard lamps 31 is 90cm, and the horizontal distance g between the blackboard lamp 31 and the blackboard 32 is 55 cm. It should be noted that this example is only an example, and the specific installation manner of the blackboard lamp can be adjusted according to the blackboard size, the blackboard lamp size, the application requirements, and the like, which is not limited in the present invention.

In summary, the present invention provides a lens structure and a blackboard lamp and a classroom lighting system using the same: through the optical design of the lens structure, partial light emitted by the light source irradiates the lower half part of the target object through the first incident surface, the total reflection surface and the first emergent surface, and partial light irradiates the upper half part of the target object through the second incident surface and the second emergent surface, so that the light energy utilization rate of the light source and the illumination uniformity of a target plane are improved, lamps required by an application scene are reduced, and the lamp cost and the energy consumption are reduced; further, the lens is produced by injection molding of a mold, and the product consistency is good; the lamp adopts the frosted plate to emit light, the light visual effect is soft and not dazzling, and the user experience is good. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A lens structure, comprising:

the bottom of the lens body is inwards sunken to form an optical cavity for installing a light source in the optical cavity, and light rays emitted by the light source irradiate on a target plane through the lens body;

a first incident surface, a total reflection surface and a first exit surface which are connected in sequence are arranged at the far target plane side of the lens body, so that light rays are incident through the first incident surface, are totally reflected through the total reflection surface and exit through the first exit surface to irradiate a first part of the target plane;

and a second incident surface and a second emergent surface which are mutually connected are arranged on the side of the lens body close to the target plane, so that light rays are emitted through the second emergent surface to irradiate a second part of the target plane after being incident through the second incident surface.

2. The lens structure of claim 1, wherein the lens body comprises:

a third incident surface; the first incident surface, the third incident surface and the second incident surface are sequentially connected to form the inner surface of the optical cavity, and light is emitted through the first emergent surface to irradiate the first part of the target plane after being incident through the third incident surface.

3. The lens structure of claim 2, comprising:

the first incident surface, the total reflection surface, the first emergent surface, the second incident surface and the third incident surface are sequentially connected end to form the closed lens body.

4. The lens structure of claim 1, wherein the second incident surface is a first free-form surface; the second emergent surface is a second free-form surface.

5. The lens structure of claim 1, wherein the lens body is an injection molded structure.

6. The lens structure of claim 2, wherein the junction of the third entrance face and the second entrance face is located on a bottom midperpendicular of the lens body.

7. A blackboard lamp, comprising:

a substrate;

the LED chip is connected with the substrate;

the lens structure of any one of claims 1 to 6, over the LED chip such that the chip is located within the cavity.

8. The blackboard lamp according to claim 7, characterised by comprising:

and the frosted plate is arranged at the periphery of the lens structure to disperse the emergent light beams.

9. The blackboard lamp according to claim 7, characterized by comprising:

the LED chips are arranged on the substrate side by side;

and the lens structures are arranged in one-to-one correspondence with the LED chips.

10. A classroom lighting system comprising:

two blackboard lights according to any of claims 7 to 9, symmetrically disposed on either side of the top of the blackboard.

Images