JP2021014130A - LED lighting device - Google Patents

Abstract

To provide an LED lighting device which can equalize light extracted from a lighting device and at the same time is capable of extracting the lighting at wide-angle.SOLUTION: A substrate 23 is fixed on a rear face side of an inner frame body 5. An LED light source 17a is implemented at a substantial center on a rear face of the substrate 23. An emission surface of the LED light source 17a is inserted into an insertion hole 25a of a light reflecting plate 21a. A reflecting external frame body 19 is disposed on a rear face side of an outer frame body 3. The substrate 23 implemented with the LED light source 17a, and the light reflecting plate 21a are disposed on a reflecting external frame body 19 side (rear face side of the inner frame body 5) with respect to the inner frame body 5. In addition, a lens 10 or convex-shaped parts of an inner lens 7 and an outer lens 9 are formed on a side opposed to the reflecting external frame body 19 (front side of the inner frame body 5) with respect to the inner frame body 5. The lens 10 or the convex-shaped parts of the inner lens 7 and the outer lens 9 serve as a light taking-out part.SELECTED DRAWING: Figure 2

Description

The present invention relates to an LED lighting device used in, for example, an automobile.

LED (Light Emitting Diode) lighting has become widespread because of its energy saving and long life, and many lightings using LEDs have been proposed. As these lighting devices, there are those in which a light reflector is arranged inside the frame of the lighting device to diffusely reflect light and irradiate it uniformly.

For example, an LED lighting device for double-structured lighting composed of an inner frame and an outer frame of a microfoamed resin sheet capable of uniformly extracting light, and a light extraction method for the LED lighting device have been proposed. (For example, Patent Document 1).

In Patent Document 1, the surface side of the inner frame functions as a reflector. Therefore, a first light guide space is formed between the surface side of the inner frame and the opening. Similarly, the back surface side of the inner frame and the front surface side of the outer frame function as reflectors, and a second light guide space is formed between the back surface side of the inner frame and the front surface side of the outer frame. To. At this time, the light that guides the second light guide space is averaged by being repeatedly reflected by the reflector, so that uniform light can be taken out.

In addition, the inner frame is mounted on the inner surface of the thin, substantially cylindrical and substantially rectangular frame, and a light diffusing plate is provided at the opening of the frame to take out light from the outer periphery of the light reflector. A lighting device to be used has been proposed (Patent Document 2).

The lighting device of Patent Document 2 has a frame body made of a microfoamed resin sheet having an opening on one side, an LED light source arranged at the center of the top surface of the frame body, and a predetermined distance from the inner side surface of the frame body. It includes a light diffusing plate arranged in the opening of the frame. A reflector is arranged on the back surface of the light diffuser, and the light from the LED light source is reflected by the reflector and the frame. A mirror is provided on the light extraction portion side of the back surface of the reflector, and uniform light is taken out from between the inner side surface of the frame and the mirror.

Further, there has been proposed an interior lighting for a vehicle capable of obtaining illumination light having high uniformity of light emission amount and emission color (Patent Document 3).

In Patent Document 3, the peak of the radiation directivity of the light emitted from the LED light source is directed to a reflector having a downwardly convex curvature and expanding toward the light extraction portion. The light emitted from the LED light source is reflected by the reflecting surface and indirectly incidents on the outer lens. This makes it possible to prevent a problem that the brightness of a part of the light emitting surface corresponding to the light emitting portion of the LED light source is locally increased. As described above, in Patent Document 3, the light from the LED light source can be controlled by combining the reflector and the outer lens.

In addition, light can be taken out from the inner lens to the front of the lighting device, and light can be taken out from the gap between the housing and the lens, so that the design can be improved regardless of whether the light source is turned on or off. Various interior lights for vehicles have been proposed (Patent Document 4).

In the vehicle interior light of Patent Document 4, the LED light source is covered from the vehicle interior side by a light transmitting lens. The lens is formed with a portion that maintains the light transmission as it is and two decorative portions that decorate the lens by processing to reduce the light transmission of the lens. The housing into which the lens is fitted integrally has a main body portion that holds the lens via a substrate and a peripheral wall portion that protrudes from the peripheral edge of the main body portion toward the vehicle interior side. A gap is formed between the peripheral wall portion and the lens, and in a plan view, the two decorative portions form an annular shape over the entire circumference of the lens with a width substantially the same as the gap. When the LED light source is lit, light leaks into the vehicle interior through the gap.

Further, a vehicle lighting device capable of improving workability related to mounting and suppressing deterioration of design has been proposed (Patent Document 5).

The vehicle lighting device of Patent Document 5 includes a base member, an LED light source arranged on the base member, an inner lens attached to the base member, and an outer lens. The inner lens covers the LED light source and has a general portion having an insertion hole through which the screw member is inserted at a position facing the mounting portion of the LED light source, and a vertical wall erected from the general portion to the base member side so as to surround the insertion hole. Has a part. The LED light source is arranged in the vicinity of the standing wall portion of the base member. In Patent Document 5, light from an LED light source arranged on a substrate directly passes through an inner lens and an outer lens, and light is extracted from these lens members. At this time, a diffuse reflection portion that has been subjected to lauret processing is provided on the surface of the inner lens, and the light from the LED light source is diffusely reflected to equalize the light extracted from the inner lens. Further, by applying the same processing to the inner surface of the outer lens, the irradiation light can be equalized.

Further, there has been proposed a vehicle lamp that can increase the commercial value by obtaining a glittering feeling and a high brightness feeling of metal when the inside of the stop lamp is viewed from the outside (Patent Document 6).

The vehicle lamp of Patent Document 6 has a triangular wave-shaped mirror block, which has a reflecting surface that reflects light from an LED light source toward the inner lens and a mirror surface that reflects light such as sunlight. And have. A plurality of triangular wave-shaped reflecting surfaces are alternately provided in the mirror block, and the plurality of reflecting surfaces are arranged within the range of the irradiation angle of the light from the LED light source. The reflected light from the mirror surface or the reflecting surface of the mirror block is received at a predetermined position on the inner lens.

Japanese Unexamined Patent Publication No. 2015-184351 JP-A-2017-016854 JP-A-2009-067097 Japanese Unexamined Patent Publication No. 2016-022790 JP-A-2015-214182 Japanese Unexamined Patent Publication No. 2004-139903

However, in Patent Document 1, an LED light source is provided in a second light guide space created by facing reflectors, and light is extracted from a light extraction unit by repeating diffuse reflection in the second light guide space. However, the light is emitted only in the front direction of the lighting device and cannot be taken out in the side direction.

Further, in Patent Document 2, a light extraction portion is arranged on the outer peripheral portion of the frame body, and the light from the LED light source is multiple-reflected by the frame body made of microfoam resin and the light reflector, so that the frame from the light extraction portion is framed. Light can be taken out in the front direction of the body, but as in Patent Document 1, light cannot be taken out to the side surface of the lighting device. Patent Document 2 does not have a light guide space for light extraction in addition to the light guide space for diffuse reflection of light.

Further, Patent Document 3 also uses a reflector and an outer lens as optical components, but since light is extracted only from the outer lens arranged in front of the lighting device, the same as in Patent Document 1 and the like. Light cannot be extracted to the side of the luminaire. Patent Document 3 does not have a light guide space for light extraction in addition to the light guide space for diffuse reflection of light.

Further, Patent Document 4 extracts light from the gap between the housing and the lens in the side surface direction of the lighting device, and there is no light guide space for diffuse-reflecting and equalizing the light of the LED light source. For this reason, the light is equalized by a pattern formed on the inner surface of the lens for scattering the light, but it is difficult to make the light uniform only with this structure, and uneven brightness is likely to occur.

Further, in Patent Document 5, as in Patent Document 4, the light is equalized by the light diffusion reflection portion formed on the inner surface of each lens, and there is no light guide space that diffusely reflects and equalizes the light of the LED light source. Therefore, it is difficult to make the light uniform, and uneven brightness is likely to occur.

Further, in Patent Document 6, only the reflecting surface arranged within the range of the irradiation angles of the light from the plurality of LED light sources is selectively used, but the inner lens of Patent Document 6 has a substantially rectangular period. It has a structure, and a part of the light diffusing prism element group directly contributes to the light extraction from the LED light source, and like Patent Document 1 and the like, the light cannot be extracted laterally.

The present invention has been made in view of such a problem, and an object of the present invention is to provide an LED lighting device capable of equalizing the light extracted from the lighting device and capable of extracting light at a wide angle.

In order to achieve the above-mentioned object, the first invention comprises an outer frame having an opening in the center, an inner frame arranged in the opening of the outer frame, and a substrate fixed to the inner frame. A first light reflecting plate arranged on the back surface of the substrate and having a first insertion hole, a first LED light source mounted on the substrate, and a reflective outer frame fixed to the outer frame. And, it is arranged so as to straddle the annular light transmitting hole formed between the outer frame body and the inner frame body, connect the outer frame body and the inner frame body, and cover the light transmitting hole. A convex lens is provided, the first light reflecting plate and the reflecting outer frame are formed of a light reflecting member, and the first LED light source has a light emitting surface of the first light reflecting. In a state of being inserted into the first insertion hole of the plate, it is fixed to the back surface of the substrate, the opening of the reflective outer frame is widened toward the substrate, and the bottom surface of the reflective outer frame is the said. It has a concave shape so as to face the first LED light source, the peripheral surface of the opening of the reflective outer frame is formed so as to surround the outer periphery of the substrate, and the lens has a hole surface of the light transmission hole. The substrate is formed in an annular shape in the direction or in the direction of the opening surface of the outer frame, and the substrate and the first LED light source on which the first LED light source is mounted are mounted on the reflective outer frame side with the inner frame as a reference. The LED lighting device is characterized in that a light reflecting plate is arranged and a light extracting portion of the lens is formed on a side opposite to the reflecting outer frame.

The cross-sectional shape of the lens that is substantially perpendicular to the hole surface of the light transmission hole of the lens may be formed in a convex shape so as to protrude from the light transmission hole.

Here, as the light-reflective member forming the first light-reflecting plate and the reflective outer frame, a metal member such as aluminum or stainless steel, a material whose surface is coated with a light-reflective paint, a microfoam resin, or the like is used. Can be used. Here, other materials can be used as long as they have the same light reflectivity as the above-mentioned materials and have high light reflectivity. Further, the first light reflector and the reflective outer frame may be made of microfoamed resin.

According to the first invention, the light of the first LED light source is a space surrounded by a reflecting frame member, an inner frame body, and a first light reflecting plate formed on the back surface of the inner frame body and an outer frame body. Is a light guide space, and the light emitted from the LED light source is repeatedly reflected in the light guide space, so that indirect light having a uniform brightness of the light taken out from the lens to the outside of the lighting device can be taken out.

Here, if the first light reflecting plate and the reflective outer frame are formed of microfoaming resin, the microfoaming resin has high diffuse reflectance, so that the light emitted from the LED light source is the light guide. By being repeatedly diffusely reflected in the space, it is possible to take out as indirect light in which the brightness of the light taken out of the illuminating device is more uniform than when it is multiple-reflected by another light reflecting member such as metal.
The lens in the first invention may be arranged at the position of the inner lens in the second invention described later, or may be arranged at the position of the outer lens.

The second invention is to provide a convex outer lens so as to cover the inner lens at a predetermined distance from the inner lens. Specifically, the second invention comprises an outer frame having an opening in the center, an inner frame arranged in the opening of the outer frame, a substrate fixed to the inner frame, and the like. A first light reflecting plate arranged on the back surface of the substrate and having a first insertion hole, a first LED light source mounted on the substrate, a reflective outer frame fixed to the outer frame, and the above. A convex shape that straddles an annular light transmitting hole formed between the outer frame and the inner frame, connects the outer frame and the inner frame, and is arranged so as to cover the light transmitting hole. An inner lens and a convex outer lens arranged so as to cover the inner lens at a predetermined distance from the inner lens are provided, and the first light reflecting plate and the reflecting outer frame are light. The first LED light source, which is formed of a reflective member, is fixed to the back surface of the substrate with a light emitting surface inserted into the first insertion hole of the first light reflecting plate, and is not reflected. The frame has a concave shape so that the opening expands toward the substrate and the bottom surface of the reflective outer frame faces the first LED light source, and the periphery of the opening of the reflective outer frame. The surface is formed so as to surround the outer periphery of the substrate, the inner lens is formed in an annular shape in the direction of the hole surface of the light transmitting hole, and the outer lens is formed in an annular shape in the direction of the opening surface of the opening of the outer frame. The substrate on which the first LED light source is mounted and the first light reflecting plate are arranged on the reflective outer frame side with the inner frame as a reference. The LED lighting device is characterized in that a light extraction portion of the inner lens and the outer lens is formed on the opposite side.

The cross-sectional shape of the inner lens that is substantially perpendicular to the hole surface of the light transmission hole is formed in a convex shape so as to protrude from the light transmission hole, and is formed in the direction of the opening surface of the opening of the outer frame of the outer lens. The cross-sectional shape of the substantially vertical lens may be formed in a convex shape so as to project from the opening surface of the outer frame.

Here, for example, as the light-reflecting member, a metal member such as aluminum or stainless steel, a material whose surface is coated with a light-reflecting paint, or the like can be used. Here, other materials can be used as long as they have the same light reflectivity as the above-mentioned materials and have high light reflectivity. Further, also in the second invention, the light reflecting member forming the first light reflecting plate and the reflecting outer frame may be made of microfoamed resin.

Here, if the first light reflecting plate and the reflective outer frame are made of microfoamed resin, the microfoamed resin forming these light reflecting members has high diffuse reflection property, so that the LED light source can be used. By repeatedly diffuse-reflecting the emitted light in the light guide space, the brightness of the light taken out of the lighting device is made more uniform than when it is multiple-reflected by other light-reflecting members such as metal. It can be taken out as light.

The outer circumference of the outer frame is larger than the outer circumference of the opening of the reflective outer frame, and the light transmission hole is formed between the opening of the outer frame and the end of the flange of the inner frame. .. Therefore, it is desirable that the outer circumference of the light transmitting hole is smaller than the opening of the reflective outer frame.

A flange portion may be provided on the outer periphery of the opening of the reflective outer frame body, and the flange portion may be fixed to the outer frame body.

It is desirable that any of the lens, the inner lens, and the outer lens is a transparent or translucent resin material or a glass material. Here, for example, the resin material may be any of silicone resin, epoxy resin, acrylic resin, polycarbonate resin and glass, but various materials may be applied as long as they are transparent or translucent materials. it can.

It is desirable that a microfoam resin is used as the light-reflecting member, and as the microfoam resin, any one of polyethylene terephthalate resin, polycarbonate resin, flame-retardant polycarbonate resin, acrylic resin or flame-retardant acrylic resin may be used. ..

The microfoamed resin may have a total reflectance of 90% or more, a diffuse reflectance of 90% or more, and an average cell diameter of 10 μm or less as the optical reflectance of the aluminum oxide standard plate as optical characteristics. ..

A first switch is arranged on the surface of the substrate in a storage space formed between the inner frame and the substrate arranged on the inner circumference of at least one of the lens, the inner lens, and the outer lens. You may.

Second LED light sources may be arranged on both sides of the first switch in the storage space at a substantially central portion of the substrate on the side opposite to the first LED light source.

Second switches are arranged on both sides of the first switch in the storage space at a substantially central portion of the substrate on the side opposite to the first LED light source, and further, the second switch in the storage space. Second LED light sources may be symmetrically arranged on both sides of the switch.

The second switch and the second LED so that at least one of the lens, the inner lens, and the outer lens surrounds the second switch and the second LED light source arranged in the storage space. It may be provided outside the light source.

The second light reflector having a second insertion hole through which the light emitting surface of the second LED light source is inserted is arranged so as to guide the light from the light emitting surface of the second LED light source. The light reflector of 2 may have a shape as a light guide portion that gradually expands from the second insertion hole toward the outer opening.

A light extraction unit is provided on the upper portion of the second light reflector, the second LED light source is arranged at a position visible from the light extraction unit, and the light from the second LED light source is generated. It may be taken out from the light extraction part.

The first LED light source may be surface-emitting indirect lighting, and the second LED light source may be spot lighting.

According to the second invention, the light of the LED light source repeats reflection (multiple reflection) many times between the light reflector on the back surface of the substrate and the reflective outer frame to equalize the light extracted from the LED lighting device. Can be transformed into. Further, by arranging the LED light source at a position where it cannot be visually recognized from the outside of the LED lighting device, it is possible to realize indirect lighting of surface emission without a feeling of glare.

Here, if the first light reflector and the reflective outer frame are made of microfoamed resin, the microfoamed resin has high diffuse reflectance, so that the light reflecting plate and the reflective outer frame are multiplexed in the light guide space including these members. By measuring the uniformity of light by diffuse reflection, it becomes possible to extract more uniform indirect light from the illuminating device than when multiple reflections are made by another light reflecting member such as metal.

Further, since both the inner lens and the outer lens have a convex shape, the light of the LED light source can pass through the two-stage lens, and the wide angle from the front direction to the side direction of the LED lighting device is omitted. Uniform light can be taken out. Further, since the brightness of the light extracted from the LED lighting device can be adjusted in two stages through the inner lens and the outer lens, it is possible to uniformly extract soft light.

Here, when the inner lens and the outer lens in the present application have a convex shape, one surface of the lens has a convexly protruding contour, and the other surface of the lens also has a shape corresponding to the other surface. It refers to a shape in which a convex space is formed on the other surface side of the lens. That is, it means that both one surface and the other surface of the lens are formed convexly in the same direction.

Further, in the present invention, since both the inner lens and the outer lens have a convex shape, when an external force acts on the inner lens or the outer lens, the stress from the inner lens or the outer lens is easily released to the outer frame. Further, by fixing all the parts such as the switch and the substrate to the outer frame in addition to the reflective outer frame, the miniaturization and assembling property of the LED lighting device are improved.

Further, the brightness of the LED lighting device can be secured as a whole by forming the light transmission hole, which is the light outlet between the outer frame and the inner frame, and the inner lens and the outer lens in a ring shape in a plan view. At the same time, it is possible to realize lighting with excellent design.

Further, by making the outer periphery of the outer frame larger than the outer circumference of the opening of the reflective outer frame and making the light transmission hole smaller than the opening of the reflective outer frame, diffuse reflection is performed by the reflective outer frame. After homogenizing the light, the light can be intensified and taken out of the LED lighting device.

Further, by providing a flange portion on the outer periphery of the opening of the reflective outer frame body and fixing the flange portion and the outer frame body, the reflective outer frame body and the outer frame body can be reliably fixed.

Further, it is desirable to use a transparent or translucent resin material or a glass material as the lens, the inner lens, and the outer lens. Here, as the resin material, any material such as silicone resin, epoxy resin, acrylic resin, polycarbonate resin or glass may be applied, and various transparent or translucent materials other than the above may be applied. The material can be applied.

Further, as the microfoam resin used for the light-reflecting member, polyethylene terephthalate resin, polycarbonate resin, flame-retardant polycarbonate resin, acrylic resin or flame-retardant acrylic resin can be applied, and various materials can be applied. it can.

Further, if the light reflectance of the microfoamed resin in the visible light band is 90% or more for the total reflectance and 90% or more for the diffuse reflectance, the light can be efficiently reflected and the light can be guided. ..

Further, a storage space is formed between the inner frame body and the substrate arranged on the inner circumference of at least one of the lens, the inner lens and the outer lens, and a first storage space is formed on the surface of the substrate in the storage space. By arranging the switch, the operation of the LED lighting device is easy.

Further, by arranging the second LED light sources on both sides of the first switch in the storage space, it is possible to irradiate different types of light.

At this time, the second switches are arranged on both sides of the first switch in the storage space, and the second LED light sources are symmetrically arranged on both sides of the second switch in the storage space. , The operation of the second LED light source is easy.

Further, at least one of the lens, the inner lens, and the outer lens is provided so as to surround the second switch and the second LED light source, so that the design is excellent and the operability is also good.

Further, by arranging the second light reflecting plate having a shape as a light guide portion so as to guide the light from the light emitting surface of the second LED light source, the light of the second LED light source is made more uniform. Can be taken out.

Further, by providing a light extraction unit on the upper portion of the second light reflector and extracting the light from the second LED light source from the light extraction unit, the light can be made uniform in the light extraction unit.

Further, if the first LED light source is surface-emitting indirect lighting and the second LED light source is spot lighting, for example, when the LED lighting device is applied to an automobile, the spot lighting light source, the ceiling, and the vehicle interior are used. You can switch between the indirect lighting that illuminates and use it, or you can use both at the same time.

According to the present invention, by separating the light guide space for equalizing light and the light extraction space, it is possible to equalize the light extracted from the lighting device and the LED capable of extracting light at a wide angle. Lighting equipment can be provided.

(A) is a plan view showing the LED lighting device 1, and (b) is a plan view showing the LED lighting device 1 with the outer lens 9 removed. FIG. 1A is a cross-sectional view taken along the line AA of FIG. 1A. (A) is a cross-sectional view showing the LED lighting device 1c, and (b) is a cross-sectional view showing the LED lighting device 1d. (A) is a plan view showing the LED lighting device 1a, and (b) is a plan view showing the LED lighting device 1a with the outer lens 9 removed. FIG. 4 (a) is a sectional view taken along line BB. An exploded sectional view of the LED lighting device 1a. Sectional drawing of LED lighting apparatus 1b.

(First Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a plan view showing the LED lighting device 1, and FIG. 2 is a sectional view taken along line AA of FIG. In the following description, the wiring of the LED light source and the like will not be shown.

As shown in FIG. 2, the LED lighting device 1 mainly includes an outer frame 3, an inner frame 5, an inner lens 7, an outer lens 9, an LED light source 17a, a reflective outer frame 19, a light reflector 21a, and a substrate. It is composed of 23 mag.

The outer frame 3 is a member having a shape corresponding to the outer shape of the LED lighting device 1, and is an annular member having an opening in the center. A protrusion protruding toward the back surface is formed on the outer edge of the outer frame 3. In the following description, the lower direction of FIG. 2 is referred to as the back surface side of the LED lighting device 1, and the upper direction is referred to as the front surface side of the LED lighting device 1.

The inner frame 5 is arranged in the opening of the outer frame 3. The shape of the inner frame 5 is not particularly limited, but the outer shape corresponds to the opening of the outer frame 3. The inner frame 5 is smaller in size than the opening of the outer frame 3, and the inner frame 5 is smaller than the opening of the outer frame 3. Is formed in the outer frame body 3 in a size that can be stored inside the opening. Therefore, when the outer frame body 3 and the inner frame body 5 are arranged so as to be aligned with each other, a gap is formed in an annular shape between the inner peripheral portion of the outer frame body 3 and the outer peripheral portion of the inner frame body 5. The annular gap formed between the outer frame 3 and the inner frame 5 serves as the light transmission hole 15.

The inner frame 5 is a molded body having a convex shape at the center and a convex shape portion 5a having a flange portion on the outer periphery and a flange portion 5b, and the central portion projects toward the surface side. A storage space 30a is formed between the convex portion 5a and the substrate on the back surface side, and a hole is formed in a substantially central portion of the convex portion 5a. A switch 11a, which will be described later, is arranged in the storage space 30a formed between the back surface side of the convex portion 5a and the substrate, and the switch 11a is formed through a hole which is an opening of the inner frame 5 forming the storage space 30a. Be exposed. The materials of the outer frame 3 and the inner frame 5 are not particularly limited, but for example, they are made of resin or metal. For example, aluminum may be preferably used as the metal material and thermoplastic resin may be preferably used as the resin material. it can. In the illustrated example, a hole is formed in the convex portion 5a of the inner frame body 5, but the hole is not formed in the convex shape portion 5a of the inner frame body 5 and is in contact with the back surface side of the inner frame body 5. It is also possible to arrange the switch 11a on the.

Here, as the material of the outer frame body 3 and the inner frame body 5, in the case of a metal material, a thin metal plate can be press-molded, or a thermoplastic resin sheet can be molded by injection molding. Considering the formation of holes in the inner frame 5, injection molding is suitable.

The substrate 23 is fixed to the back surface side of the inner frame body 5. The substrate 23 is, for example, a general glass epoxy substrate. A light reflecting plate 21a, which is a first light reflecting plate, is arranged on the back surface of the substrate 23. That is, the light reflecting plate 21a covers the back surface of the substrate 23. An insertion hole 25a, which is a first insertion hole through which the LED light source 17a, which is the first LED light source, is inserted, is provided at substantially the center of the light reflector 21a.

The LED light source 17a is mounted substantially in the center of the back surface of the substrate 23. The light emitting surface of the LED light source 17a is inserted into the insertion hole 25a of the light reflector 21a. The LED light source 17a is fixed to the back surface of the substrate 23 in this state.

The LED light source 17a is, for example, a white or neutral white light source, or a red, green, or blue colored light source. Further, the LED light source 17a may be capable of controlling the emission color by switching or mixing the red, green, and blue colored light sources. By doing so, a decoration effect or the like can be imparted.

A reflective outer frame body 19 is arranged on the back surface side of the outer frame body 3. The reflective outer frame body 19 has a concave shape in which the opening expands toward the substrate 23 side (front surface side). Further, the bottom surface of the reflective outer frame 19 faces the LED light source 17a. The opening edge portion of the reflective outer frame body 19 is fitted inside the protrusion on the back surface side of the outer frame body 3 described above, and the reflective outer frame body 19 is fixed to the outer frame body 3. In this way, the reflective outer frame body 19 is formed so that the peripheral surface of the opening of the reflective outer frame body 19 surrounds the outer periphery of the substrate 23.

The size of the outer circumference of the outer frame 3 is larger than the size of the outer circumference of the opening of the reflective outer frame 19. Further, the size of the outer circumference of the above-mentioned light transmitting hole 15 formed between the opening of the outer frame 3 and the end of the flange 5b of the inner frame 5 is the size of the opening of the reflective outer frame 19. Smaller than That is, the area of the annular shape of the light transmitting hole 15 is smaller than the area of the opening of the reflective outer frame 19.

Here, the light reflector 21a and the reflective outer frame 19 are both formed of a light-reflecting member, but here, it is desirable that the light-reflecting plate 21a and the reflective outer frame 19 are formed of a microfoamed resin having the highest diffuse reflectance. The microfoamed resin used in the present invention is an insulating resin sheet having a foamed layer in the center and non-foamed layers on both sides. Here, the foamed layer means a layer in which bubbles are generated by foaming. The light reflector 21a and the reflective outer frame 19 are made of other materials such as a metal material and a material having a light-reflecting coating film formed on the surface, as long as they are light-reflecting members having high light-reflecting properties. Can also be used.

The thickness of the microfoamed resin sheet used in the present invention is 0.4 mm to 2.0 mm, and the thickness of the non-foamed layer on the surface is 10 to 30 μm. Further, the microfoamed resin sheet of the present invention preferably has an average cell diameter in the range of 0.2 μm to 10 μm. If the average cell diameter is less than 0.2 μm, the light transmittance becomes high and the reflectance decreases. Further, if the average cell diameter is too large, the diffuse reflectance decreases, so that the average cell diameter is preferably 0.2 μm or more and 10 μm or less.

As the optical characteristics of the microfoamed resin in the visible light band with a wavelength of 450 to 650 nm, the light reflectance when an aluminum oxide standard plate is used is that the total reflectance is 90% or more and the diffuse reflectance is 90% or more. desirable. Further, it is preferable that the total reflectance is 95% or more and the diffuse reflectance is 95% or more. The optical characteristics for visible light having a wavelength of 450 to 650 nm do not differ significantly between the microfoamed resin sheet before molding and the light reflecting plate 21a and the reflective outer frame 19 after molding.

Further, in the present invention, the microfoam resin sheet used as the light-reflecting member is preferably composed of any one of polyethylene terephthalate resin, polycarbonate resin, flame-retardant polycarbonate resin, acrylic resin or flame-retardant acrylic resin.

An inner lens 7 is provided so as to straddle the light transmission hole 15 and connect the outer frame body 3 and the inner frame body 5. That is, the inner lens 7 is arranged so as to cover the light transmitting hole 15. Here, since the light transmission hole 15 is the remaining space of the opening of the reflection outer frame body 19 shielded by the outer frame body 3 and the inner frame body 5, light is transmitted to the light extraction portion side through the light transmission hole 15. Since a large amount of light passes diagonally through the light transmitting hole 15 in the case of guiding light, the light transmitting hole 15 has the effect of a diaphragm, and in this respect as well, it is easy to take out light at a wide angle. The inner lens 7 has a convex shape on the surface side of the outer frame body 3 and the inner frame body 5, and projects toward the surface side from the outer frame body 3 and the inner frame body 5. Therefore, a light guide space is formed between the inner lens 7, the outer frame body 3 and the inner frame body 5 on the back side of the inner lens 7, and the light taken out from the light transmission hole 15 is guided to this light guide space. be able to. At this time, as shown in FIG. 2, the inner lens 7 may be formed on the surfaces of the outer frame body 3 and the inner frame body 5, but the lower end portion of the inner lens 7 is formed in a flange shape and the flange is formed. The portion may be fixed to the back surface of the flange portion 5b of the outer frame body 3 and the inner frame body 5.

The outer lens 9 is arranged on the surface side of the inner lens 7 so as to cover the inner lens 7. The outer lens 9 is arranged at a predetermined distance from the inner lens 7. The outer lens 9 has a convex shape on the surface side of the outer frame body 3 and the inner frame body 5, and projects toward the surface side from the outer frame body 3 and the inner frame body 5. That is, the cross-sectional shape substantially perpendicular to the hole surface of the light transmitting hole 15 of the inner lens 7 protrudes from the light transmitting hole 15 and is formed into a convex shape. Further, the cross-sectional shape of the lens substantially perpendicular to the opening surface direction of the opening surface of the outer frame body 3 of the outer lens 9 is formed in a convex shape so as to project from the opening surface of the outer frame body 3. That is, the convex shape of the outer lens 9 is a shape that covers the entire convex shape of the inner lens 7 at a predetermined distance from the convex shape of the inner lens 7. In this way, a light guide space is formed between the back surface side of the outer lens 9 and the front surface side of the inner lens 7.

As described above, the substrate 23 on which the LED light source 17a is mounted and the light reflector 21a are arranged on the reflective outer frame 19 side (the back surface side of the inner frame 5) with the inner frame 5 as a reference. Further, with the inner frame body 5 as a reference, convex portions of the inner lens 7 and the outer lens 9 are formed on the side opposite to the reflective outer frame body 19 (the surface side of the inner frame body 5). Although details will be described later, the convex portions of the inner lens 7 and the outer lens 9 serve as light extraction portions.

Here, as shown in FIG. 1A, the outer lens 9 is formed in an annular shape in the direction of the opening surface of the opening of the outer frame body 3 (see FIG. 2). Further, FIG. 1B is a plan view of the LED lighting device 1 with the outer lens 9 removed. As shown in FIG. 1B, the inner lens 7 is formed in an annular shape in the hole surface direction of the light transmitting hole 15 (see FIG. 2).

Here, the direction of the opening surface of the opening of the outer frame 3 and the direction of the hole surface of the light transmission hole 15 are the cases where the inner lens 7 and the outer lens 9 are viewed in a substantially planar direction, that is, the outline of the plan view. It represents the shape, not the direction in the strict sense. Therefore, there is no particular problem even if the connecting portion between the inner lens 7 or the outer lens 9 and the inner frame body 5 or the outer frame body 3 is not formed exactly horizontally in the plane direction and there is a slight step.

The material of the inner lens 7 and the outer lens 9 may be any material such as a resin material or a glass material as long as it has light transmittance and a predetermined strength. For example, a transparent or translucent silicone resin, an epoxy resin, or an acrylic resin. , Polycarbonate resin, polyethylene terephthalate resin, polycarbonate resin, glass and various other materials can be applied. Further, in particular, the LED lighting device 1 may be used as decorative lighting by using colored outer lenses 9 such as blue, red, green, yellow, and orange.

A switch 11a, which is a first switch, is arranged on the surface of the substrate 23 and on the inner circumference of the annular inner lens 7 and the outer lens 9. The switch 11a operates the LED light source 17a. As described above, the inner frame body 5 is arranged on the surface side of the substrate 23, and a hole is formed in a substantially central portion of the inner frame body 5. The switch 11a is exposed from the hole of the inner frame body 5 and can be operated.

Here, the switch 11a may be a mechanical push switch or a capacitance switch. Further, a touch panel display may be provided on the front surface side of the inner frame body 5, and the operation may be performed with, for example, a transparent touch panel.

Next, a method of extracting light from the LED lighting device 1 will be described. As described above, the light emitted from the LED light source 17a irradiates the bottom of the reflective outer frame 19 facing the LED light source 17a. The light diffusely reflected by the reflection outer frame 19 is further diffusely reflected by the light reflector 21a facing the reflection outer frame 19. That is, diffuse reflection is repeated between the reflective outer frame 19 and the light reflecting plate 21a. This equalizes the light. Here, the light reflector 21a needs to cover at least a part of the flange portion 5b of the inner frame, but can also cover the whole. It is preferable to cover the entire flange portion 5b with the light reflector 21a because the brightness of the light taken out from the LED lighting device 1 is improved.

The equalized light guides the light to the light transmission hole 15. That is, the space surrounded by the reflective outer frame body 19, the light reflecting plate 21a, and the back surface of the outer frame body 3 is the light guide space. The light light guided through the light guide space and equalized is guided to the inside of the convex shape of the inner lens 7 through the light transmission hole 15, and is transmitted through the convex portion of the inner lens 7 to pass through the convex shape portion of the inner lens 7. Is irradiated to the surface side of.

At this time, since the inner lens 7 has a convex shape, light is transmitted not only in the front direction (convex direction) of the inner lens 7 but also in the side of the inner lens 7. Further, when the light passes through the inner lens 7, the light is also diffused by the inner lens 7 itself. Therefore, the light is equalized in each direction by the inner lens 7.

The light transmitted through the inner lens 7 is guided to the light guide space between the inner lens 7 and the outer lens 9, then passes through the convex portion of the outer lens 9 and is irradiated to the front surface of the LED lighting device 1. At this time, since the outer lens 9 has a convex shape, light is transmitted not only in the front direction (convex direction) of the outer lens 9 but also in the side of the outer lens 9. Further, when the light passes through the outer lens 9, the light is also diffused by the outer lens 9 itself. Therefore, the outer lens 9 equalizes the light in each direction. That is, light is irradiated over a wide range from the front to the side of the LED lighting device 1.

Here, the size of the light transmitting hole 15 is smaller than that of the opening of the reflective outer frame body 19. That is, the size of the light transmission hole 15 is small with respect to the region of the light guide space of the reflection outer frame body 19. Therefore, before the light passes through the light transmission hole 15, diffuse reflection can be repeated many times inside the light guide space to sufficiently equalize the light. Here, the smaller the size of the light transmitting hole 15, the stronger the effect of equalizing the light. Further, after the light is homogenized by being diffusely reflected by the reflective outer frame 19 and the light reflecting plate 21a, the light can be strengthened by collecting the light in the light transmitting hole 15 from the inner lens 7 and the outer lens 9. Light can be taken out.

As described above, according to the present embodiment, since the two convex lenses of the inner lens 7 and the outer lens 9 are used, when light is transmitted through each lens, the LED lighting device 1 is oriented in the front and side directions. It is possible to take out almost uniform light while gradually spreading it over a wide angle. Therefore, by adjusting the brightness of the light extracted from the LED lighting device 1 in two stages, soft light can be extracted.

Further, since the inner lens 7 and the outer lens 9 which are the light extraction portions are annular, the LED lighting device 1 can function as an annular surface light source, and the design is also excellent.

Further, since the reflective outer frame 19 and the light reflecting plate 21a, which are the main members forming the light guide space, are each made of microfoamed resin and have extremely high diffuse reflectance, the brightness can be increased even by light reflection many times. It is possible to suppress the decrease and make the light uniform and take out. Further, since the size of the light transmitting hole 15 is smaller than the size of the light guide space, light that repeats diffuse reflection in the light guide space can be collected and taken out in the light transmitting hole 15 to obtain high illuminance. ..

Further, since the LED light source 17a is arranged on the back surface side of the inner frame body 5 and can directly shield the light, the glare feeling can be reduced.

Further, since the switch 11a is arranged inside the inner lens 7 and the outer lens 9 which are annular light extraction portions, it is excellent in operability and design.

Further, since the inner lens 7 and the outer lens 9 are annular members having a convex cross section, the inner lens 7 and the outer lens 9 themselves have predetermined rigidity and are easy to handle. Further, when an external force is locally applied to a part of the outer lens 9, stress is released in the circumferential direction of each lens, and further stress is applied from the inner lens 7 and the outer lens 9 to the outer frame 3 and the inner frame 5. Easy to escape.

By integrally molding the inner lens 7, the outer frame 3 and the inner frame 5, the assembling property is good. Further, if the rigidity of the assembly of the outer frame 3 and the inner frame 5 is secured at a predetermined level by fixing the substrate 23 or the like to the outer frame 3 and the inner frame 5, the assembling property is easy and the rigidity is increased. It is possible to realize a compact LED lighting device 1 having excellent characteristics.

The LED lighting device 1 of the present invention is particularly suitable for a portable lighting device, an indoor lighting device, and a vehicle lighting device. For example, when the LED lighting device 1 is used as a vehicle interior lamp (vehicle ceiling lighting), soft light can be uniformly extracted from the entire vehicle interior including the ceiling surface. When the LED lighting device 1 is the interior lighting of the vehicle, the reflective outer frame 19 and the like are embedded in the vehicle interior and used, so that stress is not applied from the outside.

(Second Embodiment)
Next, the second embodiment will be described. FIG. 3A shows the LED lighting device 1c, and FIG. 3B shows the LED lighting device 1d. In the following description, the configurations that perform the same functions as the LED lighting device 1 are designated by the same reference numerals as those in FIGS.

In the LED lighting device 1, the outer lens 9 is provided on the inner lens 7 at a predetermined distance, but in the LED lighting devices 1c and 1d, only the lens 10 is provided instead of the inner lens 7 and the outer lens 9. It differs in that it is done. In the LED lighting device 1c, the lens 10 is provided at the position of the inner lens 7 in the LED lighting device 1, and the lens is not provided at the position where the outer lens 9 is arranged. Further, in the LED lighting device 1d, the lens 10 is provided at the position of the outer lens 9 in the LED lighting device 1, and the lens is not provided at the position where the inner lens 7 is arranged.

Similar to the LED lighting device 1, the LED lighting devices 1c and 1d have an inner frame body 5 composed of a convex shape portion 5a and a flange portion 5b, and a storage space 30a is provided between the back surface side of the convex shape portion 5a and the substrate 23. It is formed and a switch is arranged in the storage space 30a. Further, in the LED lighting devices 1c and 1d, the arrangement of the LED light source 17a and the light reflector 21a and the arrangement of the outer frame body 3, the inner frame body 5, and the reflection outer frame body 19 are the same as those of the LED lighting device 1.

The LED lighting devices 1c and 1d straddle the annular light transmitting hole 15 formed between the outer frame body 3 and the inner frame body 5, and connect the outer frame body 3 and the inner frame body 5 to the light transmitting hole 15. A convex lens 10 is arranged so as to cover the lens 10. The lens 10 is formed in an annular shape in the hole surface direction of the light transmitting hole 15 or in the opening surface direction of the outer frame 3.

As described above, even when one lens 10 is arranged in the LED lighting devices 1c and 1d, the guide surrounded by the reflective outer frame body 19, the inner frame body 5, the light reflecting plate 21a, and the outer frame body 3 In the light space, the light emitted from the LED light source 17a can be uniformly diffused and reflected. Therefore, after passing through the light transmission hole 15, the brightness of the light emitted from the lens 10 to the outside of the LED lighting devices 1c and 1d can be made uniform.

As described above, when only one lens 10 is provided as the light extraction portion, the arrangement of the lens 10 is restricted if it can be formed so as to straddle the surface of the outer frame 3 and the flange portion 5b of the inner frame 5. Instead, the lens 10 can be provided at an arbitrary position on the surface of the outer frame 3 and the flange portion 5b of the inner frame 5. The specific position of the lens 10 can be appropriately determined in consideration of the brightness of the LED lighting device, the size of the light extraction space, the light extraction direction, the design of the LED lighting device, and the like.

Further, the lens 10 which is a light extraction portion can be formed in an annular shape around the switch 11a. With such a structure, the switch 11a is arranged inside the lens 10 which is an annular light extraction portion, and has a design in operability similar to the LED lighting device 1 shown in FIG. Also excellent.

According to the second embodiment, the same effect as that of the first embodiment can be obtained. Further, even if only one lens 10 is provided, the light emitted from the LED light source 17a can be repeatedly diffusely reflected in the light guide space inside the reflection frame 19 to extract the uniformed light to the outside.

(Third Embodiment)
Next, a third embodiment will be described. FIG. 4A is a plan view showing the LED lighting device 1a, and FIG. 4B is a plan view showing the LED lighting device 1a in a state where the outer lens 9 is removed. Further, FIG. 5 is a sectional view taken along line BB of FIG. 4A, and FIG. 6 is an exploded sectional view of FIG.

As shown in FIGS. 5 and 6, the LED lighting device 1a has almost the same configuration as the LED lighting device 1, but is further provided with a second LED light source such as an LED light source 17b and a switch 11b. different.

As described above, the switch 11a is arranged at a substantially central portion on the surface side of the substrate 23 (the side opposite to the LED light source 17a). Further, switches 11b, which are second switches, are arranged on both sides of the switch 11a. Further, LED light sources 17b, which are second LED light sources, are symmetrically arranged on both sides of the switch 11b. That is, LED light sources 17b are arranged on both sides of the switch 11b.

The switch 11b operates the LED light source 17b. The LED light sources 17b on both sides can be operated independently of each other by the switch 11b provided.

As described above, the switch 11b may be a mechanical push switch or a capacitance switch. Further, a touch panel display may be provided on the front surface side of the inner frame body 5, and both the switches 11a and 11b may be operated by the touch panel. In particular, when the switch unit requires light transmission and the touch panel type is used, the projection type capacitance type touch panel type switch is preferable.

A light reflector 21b, which is a second light reflector, is arranged on the surface side of the substrate 23 at a position corresponding to the LED light source 17b. The light reflector 21b, which is the second light reflector, has an insertion hole 25b, which is a second insertion hole. The light emitting surface of the LED light source 17b is inserted into the insertion hole 25b of the light reflector 21b. The emission colors of the LED light source 17a and the LED light source 17b may be changed.

The light reflector 21b gradually expands from the insertion hole 25b toward the outer opening. That is, the light reflector 21b has a shape as a light guide portion so as to guide the light from the light emitting surface of the LED light source 17b. For the light reflector 21b, any material other than a metal material, a material having a light-reflecting coating film formed on the surface, a microfoam resin, and the like can be used as long as it is a light-reflecting member having high light reflection.

A lens 13 which is a light extraction portion is provided on the upper portion of the light reflector 21b. The light from the LED light source 17b is taken out from the lens 13 which is a light extraction unit. The same material as the inner lens 7 and the outer lens 9 can be applied to the lens 13.

In a plan view, the inner frame 5 is exposed inside the annular inner lens 7 and the outer lens 9. As described above, the inner frame body 5 has a shape in which the central portion is convex toward the surface side, and a plurality of holes are formed in the convex shape portion 5a. A storage space 30b is formed on the back surface of the convex shape portion 5a, and a switch 11a, a switch 11b, and an LED light source 17b are formed in a hole which is an opening of the storage space 30b from the center to the end portion of the convex shape portion 5a. The lenses 13 are arranged symmetrically in order. Therefore, both the inner lens 7 and the outer lens 9 are provided outside the switch 11b, the LED light source 17b, and the like so as to surround all of the switch 11a, the switch 11b, and the LED light source 17b (lens 13).

As described above, the LED light source 17a is arranged on the back surface side of the inner frame body 5 and cannot be visually recognized from the outside. Therefore, the light from the LED light source 17a is uniformized in the light guide space and is taken out from the outer lens 9 in each direction. Therefore, the LED light source 17a can function as indirect illumination of surface emission. On the other hand, the LED light source 17b is arranged at a position visible from the light extraction unit. Therefore, the LED light source 17b can function to directly extract light through the lens 13 as spot illumination in the light extraction direction of the LED lighting device 1a.

Here, although not particularly shown, even when a structure in which only the lens 10 is arranged instead of the inner lens 7 and the outer lens 9 as in the LED lighting devices 1c and 1d, other switches, LED light sources, etc. are used. If the configuration is the same, the same effect as that of the LED lighting device 1a can be obtained.

That is, the second switches are arranged on both sides of the switch 11a, the second LED light source that directly extracts light is arranged outside the switch 11a in order from the center, and the outer circumference thereof is surrounded by the lens 10 that is the light extraction unit. It is also possible to have a structure like this. With such a structure, the light from the LED light source 17a can be uniformly extracted from the lens 10, and at the same time, the direct light from the LED light source 17b can be extracted from the lens 13 which is the light extraction portion of the LED light source. it can.

For example, if the lighting device of the present invention is installed in an automobile, soft indirect light is taken out from the outer lens 9 on the outer periphery of the entire vehicle interior, and spot illumination is arranged on the inner circumference of the inner lens 7 and the outer lens 9. Direct light can be taken out from the left and right seats, respectively.

According to the third embodiment, the same effect as that of the first embodiment can be obtained. Further, by further providing the LED light source 17b, it is possible to secure the functions of both the indirect lighting by the LED lighting device 1a and the spot lighting by the LED lighting device 1b.

Further, by arranging the light reflecting plate 21b, which is a second light reflecting plate having a shape as a light guide portion, with respect to the LED light source 17b, the light extraction direction and the light irradiation region of the direct light can be adjusted, and the brightness can be adjusted. Can be adjusted. Therefore, light can be efficiently extracted through the lens 13. Here, since the purpose of the light guide unit is to reflect the light of the LED light source 17b and take it out in a predetermined direction, a light reflector made of microfoamed resin having high diffusion reflectivity is used as the light reflector 21b. There is no need. If a predetermined light reflectance is obtained, a material having a high specular reflectance such as a resin or a metal is often used, but in some cases, a material having a high diffuse reflectance can also be used.

Further, the switches 11a and 11b are arranged inside the inner lens 7 and the outer lens 9 which are annular light extraction portions, and the outer periphery of the lighting device is covered by these lenses, so that the operability and the design are excellent. ..

(Fourth Embodiment)
Next, a fourth embodiment will be described. FIG. 7 is a cross-sectional view showing the LED lighting device 1b, and is a view corresponding to FIG. The LED lighting device 1b has almost the same configuration as the LED lighting device 1a, but the form of the reflective outer frame 19 is different.

A flange portion 27 is provided on the outer periphery of the opening of the reflective outer frame body 19. The flange portion 27 is a flat portion that protrudes outward from the opening edge portion of the reflective outer frame body 19. Further, in the present embodiment, no protrusions are formed and the outer frame 3 is formed flat on the back surface side of the outer peripheral portion. The reflective outer frame body 19 is fixed to the outer frame body 3 by joining the flange portion 27 and the back surface of the outer frame body 3 by adhesion or the like.

In the illustrated example, an example is shown in which the method of fixing the reflective outer frame body 19 and the outer frame body 3 using the flange portion 27 is applied to the LED lighting device 1a, but the reflective outer frame body 19 having the flange portion 27 is shown. Is also applicable to the LED lighting device 1.

According to the fourth embodiment, the same effect as that of the first embodiment can be obtained. In this way, by using the flange portion 27, the reflective outer frame body 19 and the outer frame body 3 can be reliably fixed.

Here, in the first to fourth embodiments, the configurations in which the switches 11a and 11b are arranged in the holes formed in the convex portion 5a are shown, but in the present invention, the inner frame 5 and the substrate 23 are arranged. Since it is sufficient that the switches 11a and 11b can be arranged in the storage space 30a formed between the two, the LED light source is formed between the inner frame 5 and the back surface of the substrate 23 without forming a hole on the back surface of the convex portion 5a. May be placed and fixed.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention does not depend on the above-described embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

1, 1a, 1b, 1c, 1d ……… LED lighting device 3 ……… Outer frame 5 ……… Inner frame 5a ……… Convex shape 5b ……… Flange 7 ……… Inner lens 9… …… Outer lens 10 ………… Lens 11a, 11b ………… Switch 13 ………… Lens 15 ………… Light transmission hole 17a, 17b ………… LED light source 19 ………… Reflective outer frame 21a, 21b ………… Light reflector 23 ……… Substrate 25a, 25b ……… Insertion hole 27 ……… Flange 30a, 30b ……… Storage space

Claims (18)

An outer frame with an opening in the center,
The inner frame body arranged in the opening of the outer frame body and
The substrate fixed to the inner frame and
A first light reflector arranged on the back surface of the substrate and having a first insertion hole,
The first LED light source mounted on the substrate and
A reflective outer frame fixed to the outer frame and
A convex shape that straddles an annular light transmitting hole formed between the outer frame body and the inner frame body, connects the outer frame body and the inner frame body, and is arranged so as to cover the light transmitting hole. Lens and
Equipped with
The first light reflecting plate and the reflecting outer frame are formed of a light reflecting member, and are formed of a light reflecting member.
The first LED light source is fixed to the back surface of the substrate in a state where the light emitting surface is inserted into the first insertion hole of the first light reflector.
The reflective outer frame has an opening that expands toward the substrate, and has a concave shape so that the bottom surface of the reflective outer frame faces the first LED light source, and the opening of the reflective outer frame. The peripheral surface of the portion is formed so as to surround the outer periphery of the substrate.
The lens is formed in an annular shape in the hole surface direction of the light transmission hole or the opening surface direction of the outer frame.
With the inner frame as a reference, the substrate on which the first LED light source is mounted and the first light reflector are arranged on the reflection outer frame side, and on the side opposite to the reflection outer frame. , An LED lighting device characterized in that a light extraction portion of the lens is formed. The LED lighting device according to claim 1, wherein the cross-sectional shape of the lens substantially perpendicular to the hole surface of the light transmitting hole is formed in a convex shape so as to protrude from the light transmitting hole. The LED lighting device according to claim 1 or 2, wherein the light-reflecting member forming the first light-reflecting plate and the reflective outer frame is made of a microfoam resin. An outer frame with an opening in the center,
The inner frame body arranged in the opening of the outer frame body and
The substrate fixed to the inner frame and
A first light reflector arranged on the back surface of the substrate and having a first insertion hole,
The first LED light source mounted on the substrate and
A reflective outer frame fixed to the outer frame and
A convex shape that straddles an annular light transmitting hole formed between the outer frame body and the inner frame body, connects the outer frame body and the inner frame body, and is arranged so as to cover the light transmitting hole. Inner lens and
A convex outer lens arranged so as to cover the inner lens at a predetermined distance from the inner lens,
Equipped with
The first light reflecting plate and the reflecting outer frame are formed of a light reflecting member, and are formed of a light reflecting member.
The first LED light source is fixed to the back surface of the substrate in a state where the light emitting surface is inserted into the first insertion hole of the first light reflector.
The reflective outer frame has an opening that expands toward the substrate, and has a concave shape so that the bottom surface of the reflective outer frame faces the first LED light source, and the opening of the reflective outer frame. The peripheral surface of the portion is formed so as to surround the outer periphery of the substrate.
The inner lens is formed in an annular shape in the hole surface direction of the light transmission hole.
The outer lens is formed in an annular shape in the direction of the opening surface of the opening of the outer frame.
With the inner frame as a reference, the substrate on which the first LED light source is mounted and the first light reflector are arranged on the reflection outer frame side, and on the side opposite to the reflection outer frame. , An LED lighting device characterized in that a light extraction portion of the inner lens and the outer lens is formed. The cross-sectional shape of the inner lens that is substantially perpendicular to the hole surface of the light transmission hole is formed in a convex shape so as to protrude from the light transmission hole, and is formed in the direction of the opening surface of the opening of the outer frame of the outer lens. The LED lighting device according to claim 4, wherein the cross-sectional shape of the substantially vertical lens is formed in a convex shape so as to project from the opening surface of the outer frame. The LED lighting device according to claim 4 or 5, wherein the light-reflecting member forming the first light-reflecting plate and the reflective outer frame is made of a microfoam resin. The outer periphery of the outer frame is larger than the outer periphery of the opening of the reflective outer frame, and the light transmission hole is formed between the opening of the outer frame and the end of the flange of the inner frame. The LED lighting device according to any one of claims 1 to 6, wherein the outer periphery of the light transmitting hole is smaller than the opening of the reflective outer frame body. The LED according to any one of claims 1 to 7, wherein a flange portion is provided on the outer periphery of the opening of the reflective outer frame body, and the flange portion is fixed to the outer frame body. Lighting device. The LED illumination according to any one of claims 1 to 8, wherein any of the lens, the inner lens, and the outer lens is either a transparent or translucent resin material or a glass material. apparatus. The LED lighting device according to claim 3 or 6, wherein any of polyethylene terephthalate resin, polycarbonate resin, flame-retardant polycarbonate resin, acrylic resin, and flame-retardant acrylic resin is used as the microfoam resin. The microfoamed resin is characterized in that the total reflectance is 90% or more, the diffuse reflectance is 90% or more, and the average cell diameter is 10 μm or less as the optical reflectance with respect to the aluminum oxide standard plate as optical characteristics. The LED lighting device according to claim 3 or 6. A first switch is provided on the surface of the substrate in a storage space formed between the inner frame and the substrate arranged on the inner circumference of at least one of the lens, the inner lens, and the outer lens. The LED lighting device according to any one of claims 1 to 11, wherein the LED lighting device is arranged. A claim, wherein the second LED light sources are arranged on both sides of the first switch in the storage space at a substantially central portion of the substrate on the side opposite to the first LED light source. 12. The LED lighting device according to 12. Second switches are arranged on both sides of the first switch in the storage space at a substantially central portion of the substrate on the side opposite to the first LED light source, and further, the second switch in the storage space. The LED lighting device according to claim 12, wherein a second LED light source is symmetrically arranged on both sides of the switch. The second switch and the second switch so that at least one of the lens, the inner lens, and the outer lens surrounds the second switch and the second LED light source arranged in the storage space. The LED lighting device according to claim 14, wherein the LED lighting device is provided outside the LED light source. A second light reflector having a second insertion hole through which the light emitting surface of the second LED light source is inserted is arranged, and the second light reflector is from the light emitting surface of the second LED light source. One of claims 14 or 15, which has a shape as an optical guide portion that gradually expands from the second insertion hole toward the outer opening so as to guide light. The LED lighting device according to. A light extraction unit is provided on the upper portion of the second light reflecting plate, the second LED light source is arranged at a position visible from the light extraction unit, and the light from the second LED light source is generated. The LED lighting device according to claim 16, wherein the LED lighting device is taken out from the light extraction unit. The LED lighting device according to any one of claims 13 to 17, wherein the first LED light source is surface-emitting indirect lighting, and the second LED light source is spot lighting.

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