KR20120100777A - Lamp and luminaire - Google Patents

Abstract

PURPOSE: A lamp and a lighting apparatus are provided to distribute light similar to a halogen lamp by emitting light transmitting a reflective surface in a circumference direction. CONSTITUTION: A light emitting unit(4) is installed on one end of a body(2). A base(6) is installed on other end(2B) of the body. The body is made of ceramic resin or insulating materials. The base includes a shell(6A) with a screw thread, an insulating unit(6B) and an eyelet(6C). An LED and a concave reflector(18) are installed on the main surface of a circular plate. A light emitting device is arranged on the bottom of the concave reflector. A reflective surface controls the light distribution of the concave reflector. A lens(20) covers the front opening of the concave reflector.

Description

Lamps and Lighting Fixtures {LAMP AND LUMINAIRE}

The present invention relates to a lamp and a lighting fixture provided with a light source such as an LED or an organic EL element in a light source.

In recent years, with the high output and low cost of LED, the bulb-type LED lamp which has LED as a light source is spreading. In this kind of LED lamp, it has a base which can be attached to the socket of an existing installation, and is used as a replacement of a light bulb (for example, refer patent document 1 and patent document 2).

In addition, halogen bulbs are widely used as light sources for spotlights, and LED lamps for the purpose of replacing these halogen bulbs have also been proposed. In this type of LED lamp, the following structure has been proposed in order to obtain light distribution close to a halogen bulb.

That is, the cover member for accommodating LED in a holder provided with a base in a rear end part, and covering the opening formed in the front end part of the said holder is provided, The side wall part extended to the front side from the front end part of a holder is provided in this cover member. Then, the structure which comprised the said side wall part so that the irradiation light from LED can be transmitted to the exterior is proposed (for example, refer patent document 3). According to the LED lamp of this structure, the light of the LED is radiated in the circumferential direction through the side wall portion of the cover member so that the light distribution is close to the halogen bulb.

A radiator having a bowl-shaped radiator having a bottom part and a side part, an LED provided in the bottom part of the radiator, and a light control member for controlling the emission light of the LED are provided, and the light control member radiates part of the emission light of the LED. The LED lamp of the structure which guide | induces to the side part of and whose side part has light transmittance is also proposed (for example, refer patent document 4). According to the LED lamp of this structure, light is emitted from the side part by inducing and transmitting a part of the light of the LED to the side part while forming a desired spot light distribution by the light control member, so that the entire light distribution of the LED lamp is a halogen bulb. Getting closer to

Japanese Patent Application Publication No. 2009-4130 International Publication No. 2009/063655 Utility Model Registration No. 3164202 Japanese Patent No. 4745467

However, in the LED lamp of patent document 3, when the width | variety (width from the holder opening end part to the front end part of a cover) of the height direction of the side wall part of a cover member is narrow, light distribution, such as a halogen bulb, cannot fully be reproduced and it is uniform. No light distribution is obtained. In order to solve this problem, if the width in the height direction of the side wall portion is increased, the light radiated from the LED in the circumferential direction is irradiated in the circumferential direction through the side wall portion as it is, so that the amount of light in the circumferential direction becomes too large, There arises a problem that the amount of irradiation light also decreases.

Therefore, for example, if the light transmittance of the side wall portion is reduced in order to suppress the amount of irradiation light in the circumferential direction, a problem arises that the amount of light that is shielded and wasted at the side wall portion increases and the utilization efficiency of light is reduced.

On the other hand, in the LED lamp of patent document 4, since the side part of the radiator which accommodated LED passes light, light can be irradiated to the wide range of a circumferential direction compared with the LED lamp of patent document 3. However, since the irradiation of light to the side part is controlled by the light control member, if the light of the LED is not irradiated to a wide range of the side part by the light control member, the side part is limited, similarly to the LED lamp of Patent Document 3 above. Light is irradiated only from the range. In addition, the LED lamp of Patent Document 4 requires a light control member to control the emitted light of the LED, and also to distribute a part of the emitted light to the side portion to control the irradiation in the circumferential direction, and to the light distribution produced by the LED lamp. Therefore, the design of the light control member which simultaneously realizes the control of the light distribution and the distribution of light to the side portions is not easy.

This invention is made | formed in view of the above-mentioned situation, and an object of this invention is to provide the lamp and the lighting fixture which can suppress the quantity of light to a circumferential direction, preventing the fall of the utilization efficiency of light.

In order to achieve the above object, the present invention is to provide a concave reflector and a light emitting element disposed at the bottom of the concave reflector to emit light to one end of the substrate, the light distribution of the concave reflector Provided is a lamp, wherein the reflective surface to be controlled has a light transmittance.

The present invention is also characterized in that in the lamp, the concave reflector is formed of a transparent substrate, and a dichroic film is provided on the inner circumferential surface of the substrate to form the reflective surface.

The present invention is also characterized in that, in the lamp, a neck portion of a non-reflective surface is formed at the bottom of the concave reflector to surround the light emitting element and to enter the light of the light emitting element.

In addition, the present invention is characterized in that in the lamp, the outer peripheral surface of the base material has light diffusivity.

The present invention is also characterized in that the lamp is provided with a lens covering the tip opening of the concave reflector.

In the above lamp, the light emitting element and the concave reflecting mirror are provided, and a base member made of a thermally conductive material is provided at one end of the base, and a heat mass portion is provided at the base member. do.

In the lamp, the base member includes an edge portion protruding in the circumferential direction of the base, and integrally the heat mass portion extending in a direction substantially orthogonal to the circumferential direction on the protruding edge portion. And a heat mass cover covering the exposed portion of the heat mass portion, wherein the heat mass cover has electrical insulation properties and has a lower thermal conductivity than the heat mass portion.

In addition, in order to achieve the above object, the present invention is provided with a reflecting surface for controlling light distribution is provided with a concave reflector having a light transmittance that transmits a part of the incident light, and the bottom surface of the concave reflector A light emitting device for emitting light is provided in a case body provided with a mounting portion at a mechanism installation location, and a power supply circuit is provided in the case body for supplying lighting power to the light emitting element. .

The present invention is also characterized in that in the above lighting apparatus, a base member made of a thermally conductive material provided with the light emitting element is provided, and a heat sink thermally coupled to the case body is provided on the rear surface side of the base member. It is done.

The present invention is also characterized in that in the above lighting apparatus, a base member made of a thermally conductive material provided with the light emitting element is provided, and the base member includes a heat mass portion.

Moreover, in the said lighting fixture, the neck part of the non-reflective surface which surrounds the circumference | surroundings of the said light emitting element, and the light of the said light emitting element injects is provided in the bottom part of the said concave reflector.

Moreover, in the said lighting fixture, this invention WHEREIN: The said case body is formed in the cylinder shape, It is characterized by covering the opening of the edge part of the said case body with the said base member.

In this specification, all the contents of Japanese Patent Application No. 2011-45903 filed on March 3, 2011 and Japanese Patent Application No. 2012-2416, filed on January 10, 2012 This includes.

According to the present invention, since the reflective surface of the concave reflector is made to have light transmittance, light passing through the reflective surface is radiated in the circumferential direction, so that light distribution close to the halogen bulb can be realized. In particular, since the reflective surface for controlling light distribution is provided with light transmittance, light of the light emitting element is incident on the reflective surface without using a separate member, and light can be radiated in a wide range in the circumferential direction. In addition, since the light which does not penetrate the reflective surface among the emitted light of the light emitting element is used for irradiation in the optical axis direction, which is almost all of the main irradiation direction, the decrease in illumination efficiency is suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS The whole perspective view of the LED lamp which concerns on 1st Embodiment of this invention. (A) is an upper perspective view, (B) is a lower perspective view.
Fig. 2 is a diagram showing an external configuration of an LED lamp, (A) is a plan view, (B) is a side view, and (C) is a bottom view.
3 is a cross-sectional view taken along the line AA of FIG. 2.
FIG. 4 is an enlarged view of the concave reflector of FIG. 3. FIG.
5 shows light distribution of an LED lamp and a halogen bulb;
Fig. 6 is a diagram showing an example of optical characteristics of a reflective film, (A) showing the spectral transmittance of the reflective film, and (B) showing the spectral reflectance of the reflective film.
Fig. 7 is a diagram showing the emission spectrum characteristics of the LED lamp, the conventional LED lamp and the halogen bulb of the present embodiment.
FIG. 8 is a view showing a plane, bottom, front and side surfaces of an LED lighting device according to a second embodiment of the present invention, (A) is a plan view, (B) is a bottom view, (C) is a front view, and ( D) A side view.
9 is a cross-sectional view illustrating an internal configuration of an LED lighting fixture.
10 is an enlarged view of a light emitting unit.
11 is a cross-sectional view showing an internal configuration of an LED lighting fixture according to a modification of the second embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings.

In the following embodiment, although LED is illustrated as an example of the light emitting element which comprises a light source, this invention is not limited to this, For example, other light emitting elements, such as an organic EL, may be sufficient.

[First Embodiment]

1 is an overall perspective view of the LED lamp 1 according to the present embodiment, in which FIG. 1A is an upper perspective view, and FIG. 1B is a lower perspective view. 2 is a figure which shows the external appearance structure of the LED lamp 1, FIG. 2A is a top view, FIG. 2B is a side view, and FIG. 2C is a bottom view. 3 is a cross-sectional view showing the internal configuration of the LED lamp 1.

The LED lamp 1 is comprised so that shape and optical characteristic may become substantially the same as a conventional halogen bulb or an incandescent bulb, and it can be used as a replacement of a conventional bulb.

That is, the LED lamp 1 has a substantially cylindrical base 2, as shown in Fig. 1, and the light emitting unit 4 is placed at the tip end 2A (Fig. 3), which is one end of the base 2; The base 6 is provided in the terminal part 2B which is the other end part. The base 2 is formed of a material having insulation such as ceramics and resin. The base 6 includes a threaded cylindrical shell 6A that is screwed into a socket (not shown), and an eyelet 6C provided through an insulating portion 6B at the top of the end of the shell 6A. 6 A of these shells and 6 C of eyelets are comprised by the dimension of shape which can be attached to the existing socket. Thereby, the said LED lamp 1 can be attached to an existing socket on a ceiling or a wall surface, and can be used as a replacement of a conventional halogen bulb or an incandescent bulb.

The light emitting unit 4 includes an LED 10 as a light source, and as shown in FIG. 3, an electric circuit board having an electric circuit such as a driver circuit or a power supply circuit required for lighting the LED 10 ( 12 is housed inside the base 2. The power supply circuit of the electric circuit board 12 and the shell 6A and eyelet 6C of the base 6 are electrically connected to each other, and the shell of the base 6 is mounted by attaching the base 6 to the socket. Power is supplied from the socket via 6A and 6C to the power supply circuit of the electric circuit board 12.

In addition, when the structure of the light emitting part 4 is explained in full detail, as shown in FIG. 3, the light emitting part 4 is the said LED 10, the installation base member 16, and the concave reflecting mirror 18. As shown in FIG. ) And a Fresnel lens 20.

As the LED 10, a surface mount type LED package emitting white light is used. That is, although the LED 10 is not shown in figure, the LED chip and a thin package of substantially rectangular shape in plan view with the storage recess for accommodating the LED chip are provided. It is sealed with transparent resin of. In this transparent resin, phosphors (fluorescent pigments, fluorescent dyes, etc.) as wavelength converting materials which are excited by light emitted from the LED chip and emit light of a light emission color different from that of the LED chip are dispersed, and the light and the phosphor of the LED chip are dispersed. White is obtained by mixing of the light.

As shown in FIG. 3, the mounting base member 16 includes a support for the concave reflector 18, a pedestal for placing the light emitting surface of the LED 10 upward, a heat sink, and a heat mass of the LED 10. It is a member that functions as.

That is, the mounting base member 16 includes a plate-shaped disc portion 30 which is substantially circular in view from the top, a truncated pedestal portion 32 protruding toward the substantially center upper surface of the disc portion 30, and a disc. It is provided with the heat mass part 34 provided over the perimeter of the part 30, and is integrally shape | molded by metal materials, such as aluminum materials, which have high thermal conductivity.

The disc 30 is provided with an LED 10 and a concave reflecting mirror 18 on the major surface side on the front side, and the base 2 is provided substantially vertically on the major surface on the back side. The disc portion 30 closes the tip 2A of the base 2 and has a diameter at which the edge protrudes in the circumferential direction to the outside of the tip 2A of the base 2, and the protruding edge is entirely A heat mass 34 to be described later, which extends up and down (direction perpendicular to the circumferential direction) is integrally provided along the outer circumferential surface of the base 2 over the circumference.

The pedestal portion 32 is an LED 10 that is loaded, and is a convex portion that is substantially circular when viewed from an upper surface integrally provided at an approximately center of the main surface on the surface side of the disc portion 30. An insertion hole 32A into which 10 is inserted is formed. By inserting the LED 10 into the insertion hole 32A, the heat generation of the LED 10 moves to the pedestal portion 32 from both the bottom surface and the side surface of the LED 10, thereby improving the heat radiation efficiency. It is planned. Moreover, the pedestal part 32 is provided with two through-holes 32B which penetrate up and down, and each lead wire of the electrostatic potential and the negative potential which extends from the electric circuit board 12 of the base body 2 penetrates, respectively. It is connected to the LED 10 through the hole 32B.

The heat mass portion 34 extends up and down along the central axis K of the base 2 at the edge portion of the disc portion 30 to form a sidewall having a height width W, and the LED 10. It functions as a sufficient heat mass (heat capacity) to absorb the exothermic heat. Further, the lower end portion 34A of the heat mass portion 34 forms an insertion opening 39 that accommodates the tip portion 2A of the base 2. An adhesive resin 38 is filled between the base 2 and the mounting base member 16 without a gap to be adhered and sealed.

The gap between the base 2 and the heat mass 34 of the mounting base member 16 is preferably 3 mm or less, whereby a finger can be prevented from coming into contact with the heat mass 34 from this gap.

Moreover, since the lower end part 34A of the heat mass part 34 is formed as the insertion opening 39, and the front end part 2A of the base | substrate 2 is inserted and fixed to the said insertion opening 39, LED lamp ( The overall length of 1) can be shortened.

Here, since the heat mass of the heat mass part 34 becomes large in proportion to a volume, heat mass performance can be improved by making height width W or thickness T large. At this time, if the thickness T is made large so as to protrude from the concave reflector 18 described later in plan view in the circumferential direction of the substrate 2 (orthogonal to the central axis K), the LED lamp 1 The thickness T is preferably limited to the thickness at which the heat mass portion 34 is settled within the range of the tip opening 18A of the concave reflector 18 in plan view. When the heat mass is required exceeding the said limit, it is preferable to make height width W large. However, when the height width W is increased, the upper end portion 34B has the same degree as the neck portion 42 of the concave reflector 18 so as not to limit the shape of the concave reflector 18 described later. It is preferable to extend the height position to the same height position as the lower end portion 44A of the reflecting surface 44 to the limit, and the shortage of the heat mass extends the lower end portion 34A to the lower side to compensate.

The heat generated by the LED 10 is absorbed by the mounting base member 16 including the heat mass portion 34 to radiate heat from the heat mass portion 34 to the outside. The heat is radiated to the outside from the entire body 2 as well.

In the LED lamp 1, since the heat mass portion 34 protrudes in the circumferential direction than the base 2, it is a location that is easy for the user to contact, but the mounting base member 16 including the heat mass portion 34 is Since it is formed of the metal material which has high thermal conductivity, it is high in electroconductivity and may become high temperature by heat mass. Therefore, in order to prevent the electric shock and the burn by the contact with the said heat mass part 34, the heat mass part 34 is formed with the adhesive which has high insulation property and has lower thermal conductivity than the heat mass part 34, and heat The heat mass cover 46 which covers the whole exposed part exposed to the outer side of the mass part 34 is provided.

Thereby, even when the heat mass of the heat mass part 34 is raised and the cooling performance of the LED 10 is improved, the electric shock and the image by the contact with the said heat mass part 34 can be prevented.

The heat mass cover 46 is provided by insert molding around the mounting base member 16, for example, and is thereby firm and rigid enough to prevent the heat mass cover 46 from peeling off. The furnace heat mass cover 46 can be fixed to the heat mass unit 34.

In the present embodiment, the thickness (thickness in the circumferential direction) of the heat mass cover 46 is a lower limit of a thickness (for example, 2 mm) that can prevent burns at the time of contact with a withstand voltage of 1.2 kPa, and the existing halogen The dimension (for example, 4 mm) of the circumferential direction which can be attached to the socket holder for electric bulbs etc. is made into an upper limit.

FIG. 4 is an enlarged view of the concave reflector 18 in FIG. 3.

The concave reflector 18 has a reflecting surface 44 of a rotating ellipsoid which reflects light emitted by the LED 10 in the optical axis direction and controls light distribution to form spot light distribution, and at the same time, the reflecting surface 44 Is formed to have light transmittance, and emits light in the circumferential direction with respect to the optical axis from the whole of the reflecting surface 44, and the optical axis is provided approximately coaxial with the central axis K of the base 2. It is.

Specifically, the concave reflector 18 has a bottom opening 18B at the bottom center, and is approximately the entire surface of the inner surface of the range D from the bottom opening 18B to the tip opening 18A. It is formed as this reflecting surface 44. Moreover, the cylindrical neck part 42 extended to the rear end side is integrally provided in the bottom opening 18B. The neck part 42 is arrange | positioned in the groove part 50 formed by the pedestal part 32 of the installation base member 16, and the outer heat mass part 34, and is provided in the clearance gap between the heat mass part 34. FIG. Bonded by a filled transparent adhesive 52. Thus, since the concave reflector 18 is inserted into the groove 50 and fixed, the overall length of the LED lamp 1 can be shortened. At this time, the width | variety of the groove part 50 is preferably the size which makes the clearance gap between the concave reflector 18 and the heat mass part 34 to be 3 mm or less, and a finger contacts the heat mass part 34 from this gap by this. Can be prevented.

In addition, the length L of the neck portion 42 is longer than the height from the disc portion 30 of the pedestal portion 32 of the mounting base member 16, whereby the LED provided on the upper surface of the pedestal portion 32. The neck part 42 surrounds the circumference | surroundings of 10, and the reflecting surface 44 is arrange | positioned in the position higher than the light emitting surface 10A of the said LED 10. FIG. More precisely, the light emitting surface of the LED 10 is a position where the periphery is surrounded by the neck portion 42, and the height at which light emitted from the light emitting surface is incident on both the neck portion 42 and the reflecting surface 44. Is placed in position.

The concave reflector 18 is electrically insulating, has a high thermal resistance between the mounting base member 16 (lower thermal conductivity than the mounting base member 16), and is transparent to the light of the LED 10. The reflective surface 44 is provided with the base material 60 shape | molded by phosphorus transparent resin, transparent glass, etc., and this base material 60 is a reflection film which has the light transmittance on the whole surface of the inner side surface with respect to the said range D. It is formed by forming. By forming the concave reflector 18 by such a base material 60, the concave reflector 18 exposed to the outside is prevented from becoming electric and becoming high temperature.

As shown in FIG. 4, the light M1 emitted from the LED 10 and incident on the reflecting surface 44 is reflected by the reflecting surface 44 through the tip opening 18A as the reflected light M2. It is radiated outward (in the direction of the central axis K), and part of it is transmitted through the reflecting surface 44 and radiated in the circumferential direction as the transmitted light M3.

As a result, the transmitted light M3 is radiated in the circumferential direction from substantially the entire surface of the reflecting surface 44, so that light distribution close to a halogen bulb or an incandescent bulb can be realized.

In addition, since the reflective surface 44 is made to have light transmittance, light that does not transmit through the reflective surface 44 is used as the reflected light M2 so as not to be wasted as the main irradiated light in the direction of the central axis K. The efficiency can be improved.

The reflecting surface 44 is not formed in the neck portion 42 of the concave reflecting mirror 18, and is in a state of being completely transparent material. Therefore, the light M4 incident on the neck portion 42 from the LED 10 is transmitted through the neck portion 42 so that the gap between the heat mass portion 34 and the light portion 34 emits light, thereby reflecting the reflective surface 44. The light intensity in the circumferential direction at the lower end portion (bottom opening 18B) portion of is supplemented. In addition, a part of the light M4 incident on the neck portion 42 becomes the propagation light M5 propagating inside the base 60 of the concave reflector 18 to emit the entire base 60, This contributes to an increase in the amount of emitted light in the circumferential direction.

The Fresnel lens 20 is provided in the tip opening 18A of the concave reflecting mirror 18. The Fresnel lens 20 forms grooves of which the angles are all concentric in the front and back of the disc-shaped member made of resin. In this embodiment, the Fresnel lens 20 is a concave reflector in a posture in which the grooved main surface 20A faces the inner side (the LED 10 side) and the other main surface 20B faces the outside. It is provided in 18 A of front end openings of (18).

Specifically, the stepped portion 19 in which the Fresnel lens 20 is fitted is formed in the tip opening 18A of the concave reflector 18, and the Fresnel lens 20 is formed in the stepped portion 19. ), The Fresnel lens 20 is fixed in a state in which the tip opening 18A of the concave reflector 18 is closed.

Since the Fresnel lens 20 is provided by closing the tip opening 18A, part of the light M6 incident on the grooved surface 20A of the light M6 incident on the Fresnel lens 20. Is reflected toward the reflecting surface 44, and the reflected light M7 is transmitted through the reflecting surface 44 to be radiated in the circumferential direction, so that the amount of emitted light in the circumferential direction is increased, and the light utilization efficiency can be improved.

As a result, as shown in FIG. 5, even in the LED lamp 1, light distribution close to light distribution of the halogen bulb is realized.

Here, in the present embodiment, a dichroic film made of a dielectric multilayer film is used as the reflecting film for forming the reflecting surface 44 of the concave reflecting mirror 18, so that the reflecting surface 44 has a wavelength selectivity of light to be transmitted. I do it.

6 is a view showing an example of optical properties of the reflective film, in which FIG. 6A shows the spectral transmittance of the reflective film, and FIG. 6B shows the spectral reflectance of the reflective film.

The reflecting film of the reflecting surface 44 reflects (approximately non-transmissive) light having an emission wavelength of 400 nm to 800 nm of the LED 10 and has an optical characteristic of transmitting part of light at wavelengths of 400 nm to 800 nm. . Since some of the light passing through the reflective film can emit light suitable for indirect light in illumination in the circumferential direction, and the reflected light from the reflecting surface 44 is emitted from the tip opening 18A as the main irradiation light. As shown in FIG. 7, color rendering properties equivalent to those of existing LED lamps can be maintained.

Although the reflective film forming the reflecting surface 44 is a dichroic film made of a dielectric multilayer film, it is possible to have a wavelength selection of transmitted light and to transmit free wavelengths according to the requirements of an illumination design. Since wavelength dependence arises in the advancing direction of transmitted light, color nonuniformity and roughness nonuniformity generate | occur | produce when irradiated light of the circumferential direction is irradiated, for example on a wall surface.

Therefore, for example, embossing is performed on the outer circumferential surface 62 of the concave reflector 18 so as to have a light scattering function for scattering the transmitted light on its surface, whereby the color unevenness of the light emitted in the circumferential direction And roughness unevenness are suppressed.

As described above, according to the present embodiment, the LED 10 as a light emitting element which is disposed in the concave reflector 18 and the bottom opening 18B of the concave reflector 18 and emits light is a substrate ( It was provided in the front-end | tip part 2A of 2), and it was set as the LED lamp 1 which made light transmittance to the whole surface of the reflecting surface 44 of the concave reflecting mirror 18. FIG.

As a result, transmitted light is radiated from the substantially entire surface of the reflecting surface 44 in the circumferential direction of the LED lamp 1, so that light distribution close to a halogen bulb or an incandescent bulb can be realized. In particular, since the reflecting surface 44 is made to have light transmittance, light that does not transmit through the reflecting surface 44 is used for irradiation in the optical axis direction, which is the main irradiation direction, as reflected light, so that waste is generated even if the amount of transmitted light is suppressed. There is no work, and light utilization efficiency can be made favorable.

In addition, according to the present embodiment, since the concave reflector 18 is molded into a transparent substrate 60, a dichroic film is formed on the inner circumferential surface of the substrate 60 to form the reflecting surface 44. According to the request and the like, the wavelength of the light transmitted in the circumferential direction can be selected simply and freely, and the variation of the LED lamp 1 with different colors of the irradiation light in the circumferential direction can be made simple.

In addition, according to the present embodiment, since the outer circumferential surface 62 of the base material 60 of the concave reflector 18 has light diffusing property by embossing or the like, the dichroic reflector 44 is made of a dielectric multilayer film. Even if formed by the film, the color unevenness and illuminance unevenness of light emitted in the circumferential direction is suppressed.

In addition, according to the present embodiment, since the Fresnel lens 20 covers the tip opening 18A of the concave reflector 18, the light reflected from the back surface of the Fresnel lens 20 is circumferentially directed. It can be utilized efficiently as irradiation light to the.

Moreover, according to this embodiment, the LED 10 and the concave reflecting mirror 18 are provided in the main surface of the surface side of the disk part 30 which is a plate-shaped base member, and the back surface side of the disk part 30 is provided. The base body 2 of cylindrical shape is provided, and the edge part of the disc part 30 protrudes in the circumferential direction (direction orthogonal to a center axis | shaft) of the base material 2, and the base body 2 is spread over the perimeter of the said protruding edge part. It was set as the LED lamp 1 which installs the heat mass part 34 extended along the outer peripheral surface of this, and installs the heat mass cover 46 which covers the exposed part of this heat mass part 34. As shown in FIG.

With this configuration, heat generation of the LED 10 can be guided to the heat mass portion 34 through the disc portion 30 to be efficiently processed, and the safety at the time of contacting the heat mass portion 34 can be ensured. have.

In particular, since the heat mass cover 46 has lower electrical conductivity than the electrical insulating property and the heat mass portion 34, electric shock and burns at the time of contact can be prevented.

It goes without saying that the first embodiment can be arbitrarily modified and applied without departing from the spirit of the present invention.

[Second Embodiment]

In the LED lamp 1 demonstrated in 1st Embodiment, the electric circuit board 12 which mounted electric circuits, such as a power supply circuit of the LED 10, is accommodated in the base body 2 as a lamp main body in which the base 6 was installed. It is. For this reason, it is not easy to increase the power capacity of a power supply circuit by the limitation of the space of the base | substrate 2, but it is a deterioration of the high output of the quantity of light of the LED lamp 1. As shown in FIG.

Therefore, in this embodiment, the lighting fixture which is easy to increase the power capacity of a power supply circuit is demonstrated. In addition, in each drawing referred to by this embodiment, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Embodiment, and description is abbreviate | omitted.

FIG. 8 is a view showing the plane, bottom, front and side surfaces of the LED lighting device 100 according to the present embodiment, where FIG. 8A is a plan view, FIG. 8B is a bottom view, and FIG. (C) is a front view and FIG. 8 (D) is a side view. 9 is sectional drawing which shows the internal structure of the LED lighting fixture 100. FIG.

Like the LED lamp 1 of 1st Embodiment, this LED lighting fixture 100 is comprised substantially the same as the existing halogen bulb used for the spot light source, and light distribution, and can be used for spot illumination instead of a halogen bulb. It is supposed to be done.

That is, as shown in FIG. 8, the LED lighting fixture 100 has a substantially cylindrical case body 102, and corresponds to the front-end | tip part 102A (FIG. 9) which is an end of this case body 102. As shown in FIG. The light emitting part 104 which emits light in the direction of the center axis K of the case body 102 is provided, and the support tool 106 as an installation part in a mechanism installation location is attached to the terminal part 102B which is the other end part. It is installed and configured.

The supporter 106 is slidably provided along a rail (not shown) called a lighting rail, a wiring duct rail, or the like, which is installed at a fixture installation location of the LED lighting device 100 to support the case body 102. will be. That is, the support 106 is provided with a socket 108 having a locking portion 108A coupled to the rail, and a hollow support rod 110 extending from the socket 108. The distal end portion 110A is rotatably connected to the distal end portion 102B of the case body 102. The electric power to the LED lighting device 100 is supplied from the rail through the electrode 108B (FIG. 8B) provided in the engaging portion 108A of the socket 108, and passes through the supporting rod 110. It guides to the case body 102 through wiring (not shown).

The case body 102 is formed of, for example, a metal material having high thermal conductivity, and the end portion 102B is provided with a fitting support 112 for rotatably inserting the tip portion 110A of the support rod 110. In addition, by rotating the case body 102 relative to the supporting rod 110, the irradiation direction of the light emitting part 104 can be directed to a desired direction.

The case body 102 has the same dimension shape as a holder to which a conventional halogen bulb is mounted. The existing holder has a cylindrical shape in which a halogen bulb is inserted from the tip, has a socket that is screwed into the base of the halogen bulb, and is provided to be movable in the above-described rail slide to support the halogen bulb. In this conventional holder, when the halogen bulb provided with the reflector is mounted, the lower side is accommodated in the holder from the reflector of the halogen bulb, and the upper side is exposed from the distal end to the outside from the reflector. Also in the LED lighting fixture 100 of this embodiment, the concave reflector 18 with which the light emission part 104 is equipped is at the front-end | tip part 102A of the case body 102 comprised by the existing holder and external shape in the same dimension shape. Since it is provided in the state which protruded, it is similar to the lighting fixture which attached the halogen bulb to the existing holder not only in light distribution but also in external appearance.

The light emitting part 104 is equipped with the LED 10 similarly to the light emitting part 4 of 1st Embodiment. As shown in FIG. 11, the case body 102 accommodates the electric circuit board 115 in which the electric circuits, such as a driver circuit and the power supply circuit 176, which are required for the LED 10 to light up are mounted. The wiring drawn into the case body 102 is connected to the power supply circuit 176 through the support rod 110 of the support tool 106, and electric power is supplied to the power supply circuit 176 through the wiring. The power supply circuit 176 generates the lighting power of the LED 10 based on this power, and supplies it to the LED 10 under the control of the driver circuit.

10 is an enlarged view of the light emitting unit 104.

The light emitting part 104 of this embodiment has the light distribution equivalent to the existing halogen bulb for spot light sources, and as shown to FIG. 9 and FIG. 11, similarly to the light emitting part 4 of 1st Embodiment, The LED 10, the mounting base member 116, the cup-shaped concave reflecting mirror 18, and the Fresnel lens 20 are provided. As shown in FIG. 10, the LED 10 has a top surface configured as a light emitting surface 10A, and a surface mount type LED package that emits light from the light emitting surface 10A.

As in the first embodiment, the mounting base member 116 of the present embodiment has a substantially circular plate-shaped disk portion 130 viewed from an upper surface, and a truncated shape protruding to an approximately central upper surface of the disk portion 130. The base portion 132 and the heat mass portion 134 provided over the entire circumference of the disc portion 130 are integrally formed by a metal material such as aluminum material having high thermal conductivity. In addition, the installation base member 116 is provided with a heat mass cover 146 covering the entire exposed portion exposed to the outside of the heat mass portion 134.

The disc portion 130 has a heat mass 134 having a size that is positioned at the edge portion 103 of the distal end portion 102A of the case body 102, and the heat mass covering the heat mass portion 134. The cover 146 is brought into close contact with the edge portion 103, and the mounting base member 116 is attached to the case body 102. The opening of the tip end portion 102A of the case body 102 is blocked by the mounting base member 116, whereby the introduction of dust, dust, or the like is prevented.

In addition, as shown in FIG. 10, the heat mass cover 146 also covers the lower end portion 134A of the heat mass portion 134, whereby the front end portion 102A and the heat mass portion 134 of the case body 102. It interposes in between, and electrical insulation between them is aimed at.

Here, the thickness T of the heat mass portion 134 is preferably limited to the thickness at which the heat mass portion 134 is settled within the range of the tip opening 18A of the concave reflector 18 in plan view. In addition, when heat mass is requested | required exceeding the said limit, it is preferable to make height width W large. However, when increasing the height width W, the upper end part 134B of the heat mass part 134 does not restrict | limit the shape of the concave reflector 18 mentioned later, The height position is the same as the neck portion 42 and extends to the same height position as the lower end 44A of the reflecting surface 44 to the limit, and the shortage of the heat mass extends the lower end 134A downward. It is desirable to supplement.

The heat generated by the LED 10 conducts the mounting base member 116 including the heat mass portion 134 and accumulates in the heat mass portion 134 to radiate heat to the outside. The base member 116 is configured to actively conduct heat generation from the side of the case body 102.

That is, when the internal structure of the case body 102 is demonstrated, as shown in FIG. 9 mentioned above, the inside of the case body 102 is divided into the side of the front-end | tip part 102A, and the side of the terminal part 102B. The partition plate 115A is integrally provided. The said fitting support part 112 is provided in the side of the terminal part 102B partitioned by the partition plate 115A, and the side of the front end part 102A is comprised as the board | substrate storage container 172 which accommodates the electric circuit board 115. As shown in FIG. It is. The partition plate 115A constitutes the bottom surface of the substrate storage container 172, and the electrical circuit board 115 is housed in the partition plate 115A in a standing state so that the filler 171 is filled. The filler 171 has high electrical insulation and thermal conductivity, and heat generation of the electric circuit board 115 is thermally conducted to the case body 102 through the filler 171 to radiate heat from the surface of the case body 102.

On the other hand, a heat sink 170 is provided in close contact with the back surface of the disc portion 130 of the mounting base member 116, and the heat sink 170 is formed from a front end portion 102A of the case body 102 with a filler ( It is press-fitted into 171 and is thermally coupled to the case body 102 via the filler 171. The heat sink 170 is in surface contact so as to include the pedestal portion 132 directly under the pedestal portion 132 of the disc portion 130. Thereby, heat generation of the LED 10 is efficiently conducted from the pedestal part 132 to the heat sink 170 on the side of the case body 102, and is thermally conducted to the case body 102 through the filler 171, thereby providing a case. It radiates heat from the surface of the sieve 102.

In this way, in the LED lighting device 100, the installation base member 116 includes a heat mass portion 134 for accumulating heat generated by the LED 10, and in addition, heat conduction is conducted to the side of the case body 102 to radiate heat. Since the heat sink 170 is provided, heat dissipation of the LED 10 can be efficiently radiated and high cooling performance can be obtained. As a result, the high output of the LED 10 is facilitated, and the high-power LED lighting device 100 can be easily realized.

In addition, while the concave reflector 18 is provided in the case body 102 having the same dimension shape as the holder in which the base of the existing halogen bulb is mounted, the LED 10 is provided in the case body 102. Since the power supply circuit 176 is incorporated, the space for accommodating the power supply circuit 176 can be expanded as compared with the case where the power supply circuit 176 is incorporated into the LED lamp that simulates the halogen bulb. As a result, the LED lamp simulating a halogen bulb can be made into an external shape in a state of being mounted on an existing holder, and a high power LED lighting device 100 can be configured by incorporating a large power supply circuit 176.

The concave reflecting mirror 18 of this embodiment is comprised in substantially the same structure and optical characteristic, and the said case so that the optical axis of the reflecting surface 44 may become substantially coaxial with the central axis K of the case body 102. It is provided in the front-end | tip part 102A of the sieve 102.

Under such a configuration, in the LED lighting apparatus 100, the LED lighting apparatus 100 is configured to have the same light distribution (FIG. 5) and the same color rendering (FIG. 6) as the LED lamp 1 of the first embodiment.

As described above, according to the present embodiment, a power supply circuit for supplying lighting power to the case body 102 including the socket 108 that is a mounting portion at a mechanism installation location (rail in this embodiment) by the LED 10. Since the structure 176 is provided, the space for accommodating the power supply circuit 176 can be made larger than a conventional LED lamp, so that the power capacity of the power supply circuit 176 can be easily increased, and the output power can be easily increased.

In addition, according to this embodiment, since the heat sink 170 which is thermally coupled with the case body 102 is provided in the back surface side of the installation base member 116 which consists of a thermally conductive material in which the LED 10 is installed, LED The heat generation of 10 can be transmitted from the installation base member 116 to the case body 102, and the heat dissipation performance can be improved.

In particular, according to the present embodiment, since the mounting base member 116 includes the heat mass portion 134, even when the high-output type LED 10 is used, heat is emitted from the LED 10 to the mounting base member 116. ) And the heat sink 170 can be sufficiently processed.

Moreover, according to this embodiment, the neck part 42 of the non-reflective surface which surrounds the circumference | surroundings of the LED 10 at the bottom of the concave reflector 18, and in which the light of LED 10 injects is provided. By this structure, the connection part of the concave reflector 18 and the case body 102 emits light by the light M4 which entered the neck part 42, and the base material 60 of the concave reflector 18 is emitted. Since the whole base material 60 emits light by generating the propagation light M5 which propagates inside), it contributes to the increase of the amount of emitted light in the circumferential direction, and becomes closer to the light distribution of the existing halogen bulb.

Moreover, according to this embodiment, since the opening of the front-end | tip part 102A of the case body 102 was covered with the mounting base member 116, it is not necessary to provide the member which closes this opening separately, and is easy to assemble. do.

Further, the finger on the upper surface of the mounting base member 116 is formed by the electrically insulating concave reflecting mirror 18 provided on the upper surface of the mounting base member 116 and the heat mass portion 134 provided along the circumference. Of the heat mass cover 146 is prevented from entering and the surface exposed to the outside of the heat mass portion 134 is covered with the heat mass cover 146, so that the mounting base member 116 is provided outside the case body 102. It is possible to prevent direct finger contact with the installation base member 116.

In addition, according to the present embodiment, since the concave reflector 18 is formed of a transparent substrate 60, a dichroic film composed of a dielectric multilayer film is formed on the inner circumferential surface of the substrate 60 to form the reflecting surface 44. According to the request from the lighting design, the wavelength of the light transmitted in the circumferential direction can be selected simply and freely, and the variation of the LED lighting device 100 having different colors of the irradiation light in the circumferential direction can be made simple.

In addition, according to the present embodiment, since the outer circumferential surface 62 of the base material 60 of the concave reflector 18 has light diffusing property by embossing or the like, the dichroic reflector 44 is made of a dielectric multilayer film. Even if formed by the film, the color unevenness and illuminance unevenness of light emitted in the circumferential direction is suppressed.

In addition, according to the present embodiment, since the Fresnel lens 20 covers the tip opening 18A of the concave reflector 18, the light reflected from the back surface of the Fresnel lens 20 is circumferentially directed. It can be utilized efficiently as irradiation light to the.

In addition, a deformation | transformation and application are possible for this 2nd Embodiment arbitrarily in the range which does not deviate from the meaning of this invention.

For example, in 2nd Embodiment, the structure which thermally indirectly couples the heat sink 170 provided in the back surface of the mounting base member 116 to the case body 102 via the filler 171 via the filler 171 is illustrated. It was. However, the present invention is not limited thereto, and the heat sink 170 may be thermally coupled directly to the case body 102. For example, like the LED luminaire 200 shown in FIG. 11, the heat sink 170 has a side wall 270A that is in close contact with the main surface of the case body 102 and directly transfers heat. It is good also as a structure provided integrally with the said. Thereby, since the heat resistance from the heat sink 170 to the case body 102 is reduced, the heat dissipation performance of the LED 10 can be further improved.

In addition, in the structure of FIG. 11, since the case body 102 is electrically connected with the mounting base member 116 via the heat sink 170, the said case body 102 is formed with the material with high electrical insulation.

In addition, as long as the heat sink 170 is the structure thermally couple | bonded with the back surface of the mounting base member 116, any of a separate body and an integral part with the mounting base member 116 may be sufficient. By integrally installing the heat sink 170 on the rear surface of the mounting base member 116, the heat resistance between the mounting base member 116 and the heat sink 170 is eliminated, and the LED 10 is placed on the side of the case body 102. It is possible to efficiently transmit heat.

For example, although 2nd Embodiment demonstrated the LED lighting apparatus 100,200 installed in a rail, it is not limited to this, The installation part fixed directly or indirectly to the mounting surface, such as a wall or a ceiling, is a case. The structure 102 may be provided and fixed to the mounting surface by the mounting portion.

1: LED lamp (lamp)
2: gas
2A, 102A: Tip (one end)
3, 103: border portion
4, 104: light emitting unit
10: LED (light emitting element)
16, 116: mounting base member (base member)
18: concave reflector
18A: Tip opening
18B: Bottom opening (bottom)
20: Fresnel lens (lens)
30, 130: disc part (base part)
32, 132: pedestal
34,134: Heat mass part
42: neck part
44: reflective surface
46, 146: heat mass cover
60: description
62: outer circumference
100, 200: LED lighting equipment (lighting equipment)
102: case body
106: support (installation part)
170: heat sink
176: power circuit
K: central axis

Claims (9)

A concave reflector and a light emitting element disposed at the bottom of the concave reflector for emitting light are provided at one end of the base, and the reflecting surface for controlling light distribution of the concave reflector is made to have light transmittance. To do, lamp. The lamp according to claim 1, wherein the concave reflector is formed of a transparent substrate, and a dichroic film is provided on an inner circumferential surface of the substrate to form the reflective surface. The lamp according to claim 2, wherein an outer circumferential surface of the base material has light diffusivity. The lamp of Claim 1 or 2 provided with the lens which covers the front end opening of the said concave reflector. The said light emitting element and the said concave reflecting mirror are provided, The base member which consists of a thermally conductive material is provided in the one end of the said base, The heat mass part was provided in the said base member, The said base member is characterized by the above-mentioned. To do, lamp. The said base member is provided with the edge part which protruded in the circumferential direction of the said base, The said heat mass part is provided integrally with the said protruding edge part extended in the direction substantially orthogonal to the said circumferential direction,
The heat mass cover which covers the exposed part of the said heat mass part is provided, The said heat mass cover has electrical insulation property, and has lower thermal conductivity than the said heat mass part, The lamp of Claim 1 characterized by the above-mentioned. A concave reflector provided with a reflecting surface for controlling light distribution, the reflecting surface passing through a part of the incident light, and a light emitting element disposed at the bottom of the concave reflecting mirror to emit light, at the apparatus installation point. And a power supply circuit for providing lighting power to the light emitting element in the case body, wherein the power supply circuit is provided to the case body. The lighting apparatus of Claim 7 provided with the base member which consists of a heat conductive material in which the said light emitting element is provided, and the heat sink thermally couple | bonded with the said case body is provided in the back surface side of the said base member. . The lighting fixture of Claim 7 or 8 provided with the base member which consists of a thermally conductive material in which the said light emitting element is provided, and the said base member is equipped with the heat mass part.

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