JP5858275B2

JP5858275B2 - Lighting device

Info

Publication number: JP5858275B2
Application number: JP2011202788A
Authority: JP
Inventors: 康孝落合; 翼小西; 照郎小西
Original assignee: Ｔｓｓ株式会社
Priority date: 2011-09-16
Filing date: 2011-09-16
Publication date: 2016-02-10
Anticipated expiration: 2031-09-16
Also published as: JP2013065427A

Description

本発明は、照明装置に係り、特に円環状に複数のＬＥＤ（発光ダイオード）素子を配置した照明装置に関する。 The present invention relates to a lighting device, relates to an illumination device in which a plurality of LED (light emitting diode) elements, especially annularly.

ＬＥＤ（発光ダイオード）は、省電力、長寿命といった特性を有することから、白熱灯、蛍光灯等を利用した従来の照明器具に代わるものとして期待されている。
既に工業用検査の分野においては、従来から、光源として多数のＬＥＤ素子を用いた照明装置が好適に用いられている。例えば特許文献１には、反射光を利用し、製品表面の微少な傷や仕上がり具合等を検査するＬＥＤ照明装置が開示されている。 Since LEDs (light emitting diodes) have characteristics such as power saving and long life, they are expected to replace conventional lighting fixtures using incandescent lamps, fluorescent lamps, and the like.
Already, in the field of industrial inspection, conventionally, an illumination device using a large number of LED elements as a light source has been suitably used. For example, Patent Literature 1 discloses an LED lighting device that uses reflected light to inspect minute scratches, finishes, and the like on a product surface.

特許文献１に開示のＬＥＤ照明装置１００は、図２４（断面図）に示すように、円環状の照明ケース１０１の下部に切頭円錐形の基板１０２が設けられ、この基板１０２の下面に一様に複数のＬＥＤ素子１０３が配列されている。
このＬＥＤ照明装置１００によれば、被検査体Ｅに対し、周囲方向から一様にＬＥＤ光が照射される。即ち、被検査体の表面に光度斑が生じることなく被検査体を照射することができ、反射光を高精度に検査することができる。 As shown in FIG. 24 (cross-sectional view), the LED lighting device 100 disclosed in Patent Document 1 is provided with a frustoconical substrate 102 at the lower portion of an annular illumination case 101, and a bottom surface of the substrate 102. Similarly, a plurality of LED elements 103 are arranged.
According to the LED illumination device 100, the LED light is uniformly irradiated from the peripheral direction to the inspection object E. That is, it is possible to irradiate the object to be inspected without causing specular spots on the surface of the object to be inspected, and it is possible to inspect the reflected light with high accuracy.

特許２９７５８９３号公報Japanese Patent No. 2975893

ところで近年、前記のような工業用途ではなく、室内照明等の光源としてＬＥＤを適用することが要求されている。
例えば、円環状の照明管の場合、円環状のガラス管内にＬＥＤ素子を配置することとなるが、その場合、特許文献１に開示された照明装置１００のように、円環状の基板に複数のＬＥＤ素子を配列することが考えられる。 Incidentally, in recent years, it has been required to apply LEDs as a light source for indoor lighting or the like instead of the industrial use as described above.
For example, in the case of an annular illumination tube, LED elements are arranged in an annular glass tube. In this case, a plurality of annular substrates are provided on the annular substrate as in the illumination device 100 disclosed in Patent Document 1. It is possible to arrange LED elements.

しかしながら、図２４に示すように連続する一基板面上に複数のＬＥＤ素子を配置した場合、指向性の強いＬＥＤ光の放射方向は基板面が臨む方向に依存するため、照射領域が狭くなり、室内照明には適さないという課題があった。 However, when a plurality of LED elements are arranged on one continuous substrate surface as shown in FIG. 24, since the radiation direction of the highly directional LED light depends on the direction in which the substrate surface faces, the irradiation area becomes narrow, There was a problem that it was not suitable for indoor lighting.

本発明は、前記した点に着目してなされたものであり、円環状に複数のＬＥＤ素子を配置した照明装置において、明るさの斑（明暗）の発生を抑制し、所定の明るさを確保することのできる照明装置を提供することを目的とする。 The present invention has been made paying attention to the above points, and in a lighting device in which a plurality of LED elements are arranged in an annular shape, the occurrence of brightness spots (brightness and darkness) is suppressed, and a predetermined brightness is ensured. It is an object of the present invention to provide a lighting device that can do this.

前記目的を達成するため、本発明に係る照明装置は、長尺帯状の基板が略円環状に湾曲形成された光源基板と、前記光源基板に配置された複数のＬＥＤ（発光ダイオード）素子と、前記光源基板に電気的接続され、前記ＬＥＤ素子に給電する給電手段と、その外周部が前記光源基板の内周部に接触した状態で、前記光源基板の内周側に収容される全体が略円環状に湾曲形成されたヒートシンクと、を備え、前記光源基板の下部または上部のいずれか一方に、あるいは下部及び上部に、周方向に沿って矩形波状に複数の凸部が配列され、前記凸部がそれぞれ径方向に向けて、湾曲または屈曲されることにより、前記凸部に特定の方向を臨む基板面が形成され、前記特定の方向に臨む基板面に、前記ＬＥＤ（発光ダイオード）素子が配置され、少なくとも前記光源基板と前記ヒートシンクとは、透光性を有するガラス、またはプラスチックからなる円環状の照明管に収容され、前記照明管の上部には、複数の放熱孔が設けられていることを特徴としている。
このように構成することにより、特定の方向に臨む複数の基板面に、前記ＬＥＤ（発光ダイオード）素子が配置されているため、ＬＥＤの発光方向が円状に分散され、下方の空間に一様に照射することができ、光の斑の発生を抑制することができる。
また、その外周部が前記光源基板の内周部に接触した状態で、前記光源基板の内周側に収容される全体が略円環状に湾曲形成されたヒートシンクを備えているため、ＬＥＤ素子の発光により生じる熱は、光源基板を介してヒートシンクへと効率よく伝わり、放熱面積が大きいヒートシンクによって効果的に放熱することができる。
更に、少なくとも前記光源基板と前記ヒートシンクとは、透光性を有するガラス、またはプラスチックからなる円環状の照明管に収容され、前記照明管の上部には、複数の放熱孔が設けられているため、照明管内部の熱を外部に効率的に放熱することができ、ＬＥＤ素子への熱による悪影響を軽減することができる。 In order to achieve the above object, an illumination device according to the present invention includes a light source substrate in which a long belt-like substrate is formed in a substantially annular shape, a plurality of LED (light emitting diode) elements disposed on the light source substrate, The power supply means that is electrically connected to the light source substrate and supplies power to the LED element, and the entirety accommodated on the inner peripheral side of the light source substrate with its outer peripheral portion in contact with the inner peripheral portion of the light source substrate are substantially omitted. A plurality of convex portions arranged in a rectangular wave shape along a circumferential direction on either the lower portion or the upper portion of the light source substrate or on the lower portion and the upper portion of the light source substrate. Each of the portions is curved or bent toward the radial direction, whereby a substrate surface facing a specific direction is formed on the convex portion, and the LED (light emitting diode) element is formed on the substrate surface facing the specific direction. It is arranged, small The Kutomo the light source substrate and the heat sink housed in the lighting tube annular made of glass or plastic, having a light-transmitting property, wherein the top of the light tube, that a plurality of heat radiation holes are formed It is a feature.
With this configuration, since the LED (light emitting diode) elements are arranged on a plurality of substrate surfaces facing a specific direction, the light emitting directions of the LEDs are distributed in a circular shape and uniformly in a lower space. The generation of light spots can be suppressed.
In addition, since the outer peripheral portion is in contact with the inner peripheral portion of the light source substrate, and the entire heat sink accommodated on the inner peripheral side of the light source substrate is provided with a heat sink curved in a substantially annular shape, Heat generated by light emission is efficiently transmitted to the heat sink via the light source substrate, and can be effectively radiated by the heat sink having a large heat radiation area.
Furthermore, at least the light source substrate and the heat sink are accommodated in an annular illumination tube made of light-transmitting glass or plastic, and a plurality of heat radiation holes are provided in the upper portion of the illumination tube. The heat inside the lighting tube can be efficiently radiated to the outside, and the adverse effect of heat on the LED element can be reduced.

ここで、前記ヒートシンクは、平面視が矩形波状の蛇腹形状に屈曲形成されると共に、全体が略円環状に湾曲形成されていることが望ましい。
このように蛇腹形状のヒートシンクを備え、その外周部が光源基板の内周部に接触した状態となされるため、ＬＥＤ素子の発光により生じる熱は、光源基板を介してヒートシンクへと効率よく伝わり、放熱面積が大きいヒートシンクによって効果的に放熱することができる。
また、前記凸部の間の光源基板の本体に、ＬＥＤ（発光ダイオード）素子が配置されていることが望ましい。
また、前記光源基板の本体が折り曲げられ、光源基板の本体に設置されたＬＥＤ（発光ダイオード）素子が外側斜め下方を臨むように配置されているのが望ましい。 Here, it is desirable that the heat sink is bent and formed in a bellows shape having a rectangular wave shape in plan view, and the entire heat sink is bent in a substantially annular shape.
As described above, the bellows-shaped heat sink is provided, and the outer peripheral portion thereof is in contact with the inner peripheral portion of the light source substrate, so that the heat generated by the light emission of the LED element is efficiently transmitted to the heat sink through the light source substrate, Heat can be effectively radiated by a heat sink having a large heat radiation area.
Moreover, it is desirable that an LED (light emitting diode) element is disposed on the main body of the light source substrate between the convex portions.
Further, it is desirable that the light source substrate body is bent and the LED (light emitting diode) elements installed on the light source substrate body are arranged so as to face obliquely downward on the outside.

また、前記複数の凸部は、それぞれ径方向に向けて、湾曲または屈曲されることにより、第１の特定の方向を臨む第１の基板面と、第１の特定の方向と異なる第２の特定の方向を臨む第２の基板面とを形成し、前記第１の基板面及び第２の基板面に前記ＬＥＤ（発光ダイオード）素子が配置されていることが望ましい。
このように、第１の特定の方向を臨む基板面と、第１の特定の方向と異なる第２の特定の方向を臨む基板面とが形成され、これら基板面にＬＥＤ（発光ダイオード）素子が配置されているため、下方の空間に対して、より一様に照射することができ、光の斑の発生を抑制することができる。
尚、前記複数の凸部において、光源基板の下部に複数配列された凸部が、第１の特定の方向を臨む第１の基板面を形成し、光源基板の上部に複数配列された凸部が、第２の特定の方向を臨む第２の基板面を形成し、前記第１の基板面及び第２の基板面に、ＬＥＤ（発光ダイオード）素子が設置されることが望ましい。 The plurality of convex portions are each curved or bent in the radial direction, whereby a first substrate surface facing the first specific direction and a second different from the first specific direction. It is desirable that a second substrate surface facing a specific direction is formed, and the LED (light emitting diode) element is disposed on the first substrate surface and the second substrate surface.
Thus, the substrate surface facing the first specific direction and the substrate surface facing the second specific direction different from the first specific direction are formed, and an LED (light emitting diode) element is formed on these substrate surfaces. Since it is arrange | positioned, it can irradiate more uniformly with respect to the space below, and generation | occurrence | production of the spot of light can be suppressed.
In the plurality of protrusions, the plurality of protrusions arranged at the lower part of the light source substrate forms a first substrate surface facing the first specific direction, and the plurality of protrusions arranged at the upper part of the light source substrate. However, it is preferable that a second substrate surface facing the second specific direction is formed, and an LED (light emitting diode) element is provided on the first substrate surface and the second substrate surface.

また、前記光源基板は、所定の金属層を有することにより屈曲及び湾曲可能な金属ベース基板からなり、前記金属ベース基板が湾曲されて略円環状に形成されていることが望ましい。
このような金属ベース基板を用いることにより、前記光源基板を略円環状に湾曲形成することができる。また、各凸部における基板面の臨む方向の調整を独立して容易に行うことができ、設置場所に応じてＬＥＤ光の放射角度を変えることができる。 Preferably, the light source substrate is formed of a metal base substrate that can be bent and bent by having a predetermined metal layer, and the metal base substrate is bent and formed in a substantially annular shape.
By using such a metal base substrate, the light source substrate can be formed in a substantially annular shape. Moreover, the direction in which the substrate surface faces each convex portion can be easily adjusted independently, and the emission angle of the LED light can be changed according to the installation location.

また、前記給電手段は電源回路を含み、前記電源回路は光源基板内に形成されていることが望ましい。
また、前記光源基板は複数の基板からなり、組み合わされて長尺帯状の基板が略円環状に湾曲の光源基板として構成されていることが望ましい。 Preferably, the power supply means includes a power supply circuit, and the power supply circuit is formed in the light source substrate.
Preferably, the light source substrate is composed of a plurality of substrates, and the long band-shaped substrate is configured as a light source substrate that is curved in a substantially annular shape.

また、前記照明装置に用いられる光源基板は、長尺帯状の基板が略円環状に湾曲形成され、前記基板の下部または上部のいずれか一方に、あるいは下部及び上部に、周方向に沿って矩形波状に複数の凸部が配列され、前記凸部がそれぞれ径方向に向けて、湾曲または屈曲されることにより、前記凸部に特定の方向を臨む基板面が形成され、前記特定の方向に臨む基板面に、前記ＬＥＤ（発光ダイオード）素子が配置されていることが望ましい。
このように構成することにより、特定の方向に臨む複数の基板面に、前記ＬＥＤ（発光ダイオード）素子が配置されているため、ＬＥＤの発光方向が円状に分散され、下方の空間に一様に照射することができ、光の斑の発生を抑制することができる。 In addition, the light source substrate used in the lighting device is a long band-shaped substrate that is curved in a substantially annular shape, and is rectangular along the circumferential direction at either the lower or upper portion of the substrate, or at the lower and upper portions. A plurality of convex portions are arranged in a wavy shape, and each convex portion is curved or bent in the radial direction, whereby a substrate surface facing a specific direction is formed on the convex portion, and faces the specific direction. It is desirable that the LED (light emitting diode) element is disposed on the substrate surface .
With this configuration, since the LED (light emitting diode) elements are arranged on a plurality of substrate surfaces facing a specific direction, the light emitting directions of the LEDs are distributed in a circular shape and uniformly in a lower space. The generation of light spots can be suppressed.

ここで、前記凸部の間の光源基板の本体に、ＬＥＤ（発光ダイオード）素子が配置されていることが望ましい。
また、前記光源基板の本体が折り曲げられ、光源基板の本体に設置されたＬＥＤ（発光ダイオード）素子が外側斜め下方を臨むことが望ましい。 Here, it is desirable that an LED (light emitting diode) element is disposed on the main body of the light source substrate between the convex portions.
In addition, it is preferable that the light source substrate body is bent and an LED (light emitting diode) element installed on the light source substrate body faces obliquely downward on the outside.

また、前記複数の凸部は、それぞれ径方向に向けて、湾曲または屈曲されることにより、第１の特定の方向を臨む第１の基板面と、第１の特定の方向と異なる第２の特定の方向を臨む第２の基板面とが形成され、前記第１の基板面及び第２の基板面に前記ＬＥＤ（発光ダイオード）素子が配置されていることが望ましい。
このように、第１の特定の方向を臨む基板面と、第１の特定の方向と異なる第２の特定の方向を臨む基板面とが形成され、これら基板面にＬＥＤ（発光ダイオード）素子が配置されているため、下方の空間に対して、より一様に照射することができ、光の斑の発生を抑制することができる。
尚、前記複数の凸部において、光源基板の下部に複数配列された凸部が、第１の特定の方向を臨む第１の基板面を形成し、光源基板の上部に複数配列された凸部が、第２の特定の方向を臨む第２の基板面を形成し、前記第１の基板面及び第２の基板面に、ＬＥＤ（発光ダイオード）素子が設置されることが望ましい。 The plurality of convex portions are each curved or bent in the radial direction, whereby a first substrate surface facing the first specific direction and a second different from the first specific direction. It is desirable that a second substrate surface facing a specific direction is formed, and the LED (light emitting diode) element is disposed on the first substrate surface and the second substrate surface.
Thus, the substrate surface facing the first specific direction and the substrate surface facing the second specific direction different from the first specific direction are formed, and an LED (light emitting diode) element is formed on these substrate surfaces. Since it is arrange | positioned, it can irradiate more uniformly with respect to the space below, and generation | occurrence | production of the spot of light can be suppressed.
In the plurality of protrusions, the plurality of protrusions arranged at the lower part of the light source substrate forms a first substrate surface facing the first specific direction, and the plurality of protrusions arranged at the upper part of the light source substrate. However, it is preferable that a second substrate surface facing the second specific direction is formed, and an LED (light emitting diode) element is provided on the first substrate surface and the second substrate surface.

また、前記光源基板は、所定の金属層を有することにより屈曲及び湾曲可能な金属ベース基板からなり、前記金属ベース基板が湾曲されて略円環状に形成されていることが望ましい。また、前記給電手段は電源回路を含み、前記電源回路は光源基板内に形成されていることが望ましい。更に、前記光源基板は複数の基板からなり、前記光源基板を構成する複数の基板を組み合わせて略円環状に湾曲の光源基板として構成されていることが望ましい。 Preferably, the light source substrate is formed of a metal base substrate that can be bent and bent by having a predetermined metal layer, and the metal base substrate is bent and formed in a substantially annular shape. Preferably, the power supply means includes a power supply circuit, and the power supply circuit is formed in the light source substrate. Furthermore, it is desirable that the light source substrate is composed of a plurality of substrates, and is configured as a light source substrate that is curved in a substantially annular shape by combining a plurality of substrates constituting the light source substrate.

本発明によれば、円環状に複数のＬＥＤ素子を配置した照明装置において、明るさの斑（明暗）の発生を抑制し、所定の明るさを確保することのできる照明装置を得ることができる。 ADVANTAGE OF THE INVENTION According to this invention, in the illuminating device which has arrange | positioned several LED element in the annular | circular shape, generation | occurrence | production of the brightness spot (brightness and darkness) can be suppressed, and the illuminating device which can ensure predetermined | prescribed brightness can be obtained. Yes.

図１は、本発明に係る照明装置を上方から見た斜視図である。FIG. 1 is a perspective view of a lighting device according to the present invention as viewed from above. 図２は、本発明に係る照明装置を下方から見た斜視図である。FIG. 2 is a perspective view of the lighting device according to the present invention as viewed from below. 図３は、本発明に係る照明装置を分解した状態で、照明装置を構成する各部材を下方から見た斜視図である。FIG. 3 is a perspective view of members constituting the lighting device as viewed from below in a state where the lighting device according to the present invention is disassembled. 図４は、本発明に係る照明装置が備える光源基板とヒートシンクとを重ねた状態で上方から見た斜視図である。FIG. 4 is a perspective view seen from above in a state in which a light source substrate and a heat sink provided in the illumination device according to the present invention are stacked. 図５は、本発明に係る照明装置が備える光源基板とヒートシンクとを重ねた状態で下方から見た斜視図である。FIG. 5 is a perspective view seen from below in a state in which a light source substrate and a heat sink provided in the lighting device according to the present invention are overlapped. 図６は、図４のＡ−Ａ矢視断面図である。6 is a cross-sectional view taken along line AA in FIG. 図７は、本発明に係る照明装置が備える光源基板を屈曲及び湾曲形成する前の加工前基板を示し、図７（ａ）は正面図、図７（ｂ）は側面図である。7A and 7B show a substrate before processing before bending and bending the light source substrate included in the illumination device according to the present invention, FIG. 7A is a front view, and FIG. 7B is a side view. 図８は、本発明に係る照明装置が備える光源基板の層構造を説明するための断面図である。FIG. 8 is a cross-sectional view for explaining the layer structure of the light source substrate provided in the lighting apparatus according to the present invention. 図９は、本発明に係る照明装置が備える光源基板の形成方法を説明するための図であり、図９（ａ）は正面図、図９（ｂ）は側面図である。9A and 9B are diagrams for explaining a method of forming a light source substrate included in the lighting apparatus according to the present invention, in which FIG. 9A is a front view and FIG. 9B is a side view. 図１０は、本発明に係る照明装置が備える光源基板の形成方法を説明するための光源基板の下面図である。FIG. 10 is a bottom view of the light source substrate for explaining a method of forming the light source substrate included in the illumination device according to the present invention. 図１１は、本発明に係る照明装置が備える光源基板の形成方法を説明するための光源基板の側面図である。FIG. 11 is a side view of a light source substrate for explaining a method of forming a light source substrate included in the illumination device according to the present invention. 図１２は、本発明に係る照明装置が備える光源基板の第１の変形例を示す図であって、（ａ）は、光源基板の加工前基板を示す正面図、（ｂ）はその側面図、（ｃ）は加工後の光源基板を示す側面図である。12A and 12B are views showing a first modification of the light source substrate included in the illumination device according to the present invention, in which FIG. 12A is a front view showing the unprocessed substrate of the light source substrate, and FIG. 12B is a side view thereof. (C) is a side view which shows the light source board | substrate after a process. 図１３は、本発明に係る照明装置が備える光源基板の第２の変形例を示す図であって、（ａ）は、光源基板の加工前基板を示す正面図、（ｂ）はその側面図、（ｃ）は加工後の光源基板を示す側面図である。13A and 13B are diagrams showing a second modification of the light source substrate provided in the illumination device according to the present invention, in which FIG. 13A is a front view showing a substrate before processing the light source substrate, and FIG. 13B is a side view thereof. (C) is a side view which shows the light source board | substrate after a process. 図１４は、本発明に係る照明装置が備える光源基板の第３の変形例を示す図であって、（ａ）は、光源基板の加工前基板を示す正面図、（ｂ）はその側面図、（ｃ）は加工後の光源基板を示す側面図である。14A and 14B are diagrams showing a third modification of the light source substrate provided in the lighting device according to the present invention, in which FIG. 14A is a front view showing the unprocessed substrate of the light source substrate, and FIG. 14B is a side view thereof. (C) is a side view which shows the light source board | substrate after a process. 図１５は、本発明に係る照明装置が備える光源基板の第４の変形例を示す図であって、（ａ）は、光源基板の加工前基板を示す正面図、（ｂ）はその側面図、（ｃ）は加工後の光源基板を示す側面図である15A and 15B are views showing a fourth modification of the light source substrate provided in the illumination device according to the present invention, in which FIG. 15A is a front view showing a substrate before processing the light source substrate, and FIG. 15B is a side view thereof. (C) is a side view which shows the light source substrate after a process. 図１６は、本発明に係る照明装置が備える光源基板の第４の変形例を示す図であって、光源基板の加工前基板を示す正面図である。FIG. 16 is a view showing a fourth modification of the light source substrate provided in the illumination device according to the present invention, and is a front view showing the substrate before processing of the light source substrate. 図１７は、図１６に示した光源基板の加工後の基板を示す斜視図である。FIG. 17 is a perspective view showing the substrate after processing the light source substrate shown in FIG. 図１８は、図１７に示した光源基板の変形例（第５の変形例）を示す図であって、光源基板の加工前基板を示す正面図である。FIG. 18 is a view showing a modified example (fifth modified example) of the light source substrate shown in FIG. 17, and is a front view showing the unprocessed substrate of the light source substrate. 図１９は、光源基板と電源回路との関係を示す模式図であって、（ａ）は光源基板に電源回路基板が電気的に接続されている状態を示す図、（ｂ）は光源基板内に電源回路を形成された変形例を示す図である。19A and 19B are schematic views showing the relationship between the light source board and the power supply circuit, where FIG. 19A shows a state in which the power supply circuit board is electrically connected to the light source board, and FIG. 19B shows the inside of the light source board. It is a figure which shows the modification by which the power supply circuit was formed in. 図２０は、光源基板内に電源回路を形成され、光源基板が全体として多角形（６角形）に形成された変形例を示す図である。FIG. 20 is a diagram showing a modification in which a power supply circuit is formed in a light source substrate, and the light source substrate is formed in a polygon (hexagon) as a whole. 図２１は、照明装置内にＬＥＤ素子が設置された光源基板のみを配置し、照明装置の外部に電源回路基板を設けた変形例を示す模式図である。FIG. 21 is a schematic diagram showing a modification in which only the light source substrate on which the LED elements are installed is arranged in the lighting device, and the power circuit board is provided outside the lighting device. 図２２は、複数の基板（例えば２枚の基板）で略円環状の光源基板を構成した変形例を示す模式図である。FIG. 22 is a schematic diagram illustrating a modification in which a substantially annular light source substrate is configured by a plurality of substrates (for example, two substrates). 、図２３は、複数の電源回路基板が設けられた変形例を示す模式図である。FIG. 23 is a schematic diagram showing a modification in which a plurality of power supply circuit boards are provided. 図２４は、従来の工業用途における円環状のＬＥＤ照明装置の断面図である。FIG. 24 is a cross-sectional view of an annular LED illumination device in a conventional industrial application.

以下、本発明の実施の形態を図面に基づき説明する。図１は、本発明に係る照明装置を上方から見た斜視図、図２は、下方から見た斜視図である。
図１に示す照明装置１は、照明管として円環状のガラス管２を備え、このガラス管２内に光源として複数のＬＥＤ（発光ダイオード）素子を備える。ガラス管２は、透光性に優れる上カバー３と下カバー４とからなり、それらが係合した状態で、上カバー３側から複数本の螺子５により相互に螺合されている。
尚、ガラス管２（上カバー３、下カバー４）の内面には、例えば光拡散のための粉末状の微粒子がベーキングにより付着加工され、ガラス管２は外観上、乳白色を呈している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a lighting device according to the present invention as viewed from above, and FIG. 2 is a perspective view as viewed from below.
The illuminating device 1 shown in FIG. 1 includes an annular glass tube 2 as an illumination tube, and a plurality of LED (light emitting diode) elements as light sources in the glass tube 2. The glass tube 2 includes an upper cover 3 and a lower cover 4 that are excellent in translucency. The glass tube 2 is screwed together by a plurality of screws 5 from the upper cover 3 side in the engaged state.
For example, powdery fine particles for light diffusion are attached to the inner surface of the glass tube 2 (upper cover 3 and lower cover 4) by baking, and the glass tube 2 is milky white in appearance.

また、図１に示すように上カバー３の上面には、複数の放熱孔３ａが形成され、これら放熱孔３ａからガラス管２内部の熱を外部に放熱する構造となされている。
また、円環状のガラス管２の内周面には、一般的な円環状の蛍光管と同様に、電源供給のための電極ピン６を有するコネクタ７が設けられている。 Further, as shown in FIG. 1, a plurality of heat radiation holes 3a are formed on the upper surface of the upper cover 3, and the heat inside the glass tube 2 is radiated to the outside through these heat radiation holes 3a.
A connector 7 having electrode pins 6 for supplying power is provided on the inner peripheral surface of the annular glass tube 2 in the same manner as a general annular fluorescent tube.

次にガラス管２内部の構成について説明する。図３は、照明装置１を分解した状態で、照明装置１を構成する各部材を下方から見た斜視図である。
図３に示すように、ガラス管２（上カバー３、下カバー４）の中には、複数のＬＥＤ素子８が取り付けられた光源基板１０と、放熱のためのヒートシンク２０とが重ねられた状態で収容される。
更に、複数のＬＥＤ素子８に安定した給電を行うための電源回路基板３０（給電手段）が前記光源基板１０に電気的に接続されて収容される。 Next, the structure inside the glass tube 2 will be described. FIG. 3 is a perspective view of the members constituting the illuminating device 1 as seen from below with the illuminating device 1 disassembled.
As shown in FIG. 3, in the glass tube 2 (upper cover 3 and lower cover 4), a light source substrate 10 to which a plurality of LED elements 8 are attached and a heat sink 20 for heat dissipation are overlaid. Is housed in.
Further, a power supply circuit board 30 (feeding means) for stably feeding power to the plurality of LED elements 8 is electrically connected to the light source board 10 and accommodated.

光源基板１０は、１枚の長尺帯状の基板本体１０ａが略円環状に湾曲形成され、その両端１０ｂ、１０ｃは自由端となされている。
また、基板本体１０ａの下部には、矩形波状に複数の凸部１０ｄが周方向に配列されている。それら凸部１０ｄは、径方向に向けて二段階に屈曲され、径方向断面が略Ｌ字形となされている。
尚、基板本体１０ａ、及び各凸部１０ｄには、所定の回路パターン（図示せず）がプリント配線により形成されている。 The light source substrate 10 is formed by bending a long strip-shaped substrate body 10a into a substantially annular shape, and both ends 10b and 10c are free ends.
In addition, a plurality of convex portions 10d are arranged in the circumferential direction in a rectangular wave shape at the lower portion of the substrate body 10a. These convex portions 10d are bent in two stages toward the radial direction, and the radial cross section is substantially L-shaped.
A predetermined circuit pattern (not shown) is formed by printed wiring on the substrate body 10a and each convex portion 10d.

また、凸部１０ｄは、前記のように二段階に屈曲することにより、垂直下方に臨む基板面１０ｅと、外側斜め下方に臨む基板面１０ｆとが形成されている。各凸部１０ｄには、基板面１０ｅと基板面１０ｆのいずれかに１つのＬＥＤ素子８が設置されるが、周方向に配列された複数の凸部１０ｄにおいて、その設置面が交互に異なるようになされている。
このようなＬＥＤ素子８の設置パターンによれば、照明装置１の垂直下方と、外側斜め下方とにＬＥＤの発光方向が円状に分散され、下方の空間に一様に照射することができ、光の斑の発生を抑制することができる。 Further, the convex portion 10d is bent in two stages as described above, thereby forming a substrate surface 10e that faces vertically downward and a substrate surface 10f that faces obliquely downward outside. Each of the convex portions 10d is provided with one LED element 8 on either the substrate surface 10e or the substrate surface 10f, but the plurality of convex portions 10d arranged in the circumferential direction have different installation surfaces. Has been made.
According to such an installation pattern of the LED elements 8, the light emission directions of the LEDs are distributed in a circular shape in the vertically lower side and the outer diagonally lower side of the lighting device 1, and the lower space can be uniformly irradiated. Generation of light spots can be suppressed.

また、ヒートシンク２０は、１枚の長尺の金属板、例えばアルミニウム板が平面視で矩形波状の蛇腹形状に屈曲形成されると共に、光源基板１０と同様に全体が略円環状に湾曲形成されている。このヒートシンク２０が設けられることにより、ＬＥＤ素子８の発光により生じる熱を効果的に放熱することができる。
具体的に説明すると、図４は、光源基板１０とヒートシンク２０とを重ねた状態で上方から見た斜視図、図５は、下方から見た斜視図、図６は、図４のＡ−Ａ矢視断面図である。図４、図５に示すように、略円環状の光源基板１０の内周に沿って、同じく略円環状のヒートシンク２０が丁度収まるように重ねられている。 Further, the heat sink 20 is formed by bending a long metal plate, for example, an aluminum plate into a rectangular corrugated shape in a plan view, and is curved in a substantially annular shape as in the light source substrate 10. Yes. By providing the heat sink 20, heat generated by light emission of the LED element 8 can be effectively radiated.
More specifically, FIG. 4 is a perspective view seen from above with the light source substrate 10 and the heat sink 20 overlapped, FIG. 5 is a perspective view seen from below, and FIG. 6 is AA in FIG. It is arrow sectional drawing. As shown in FIGS. 4 and 5, the substantially annular heat sink 20 is overlapped along the inner periphery of the substantially annular light source substrate 10 so as to be just fit.

即ち、ヒートシンク２０の外周形状は、図６に示すように、光源基板１０の内周形状に合わせて形成され、その外周部２０ａ、２０ｂ、及び下端部２０ｃが、光源基板１０の内周部にそれぞれ接触するようになされている。
したがって、ＬＥＤ素子８の発光により生じる熱は、凸部１０ｄ及び基板本体１０ａを介してヒートシンク２０へと効率よく伝わり、放熱面積が大きいヒートシンク２０によって効果的に放熱される。
尚、図１に示すように上カバー３の内面には、電源回路基板３０を装着するための回路保持部３ｂと、螺子５が螺入される螺子穴３ｃとが形成されると共に、ヒートシンク２０を支持するための複数のリブ３ｄが径方向に沿って複数形成されている。 That is, the outer peripheral shape of the heat sink 20 is formed in accordance with the inner peripheral shape of the light source substrate 10 as shown in FIG. 6, and the outer peripheral portions 20 a and 20 b and the lower end portion 20 c are formed on the inner peripheral portion of the light source substrate 10. Each is in contact.
Therefore, the heat generated by the light emission of the LED element 8 is efficiently transmitted to the heat sink 20 via the convex portion 10d and the substrate body 10a, and is effectively radiated by the heat sink 20 having a large heat radiation area.
As shown in FIG. 1, on the inner surface of the upper cover 3, a circuit holding portion 3b for mounting the power supply circuit board 30 and a screw hole 3c into which the screw 5 is screwed are formed, and a heat sink 20 is provided. A plurality of ribs 3d are formed along the radial direction.

続いて、前記円環状の光源基板１０の形成方法について説明する。
光源基板１０を形成する場合、図７（ａ）に示すように長尺帯状の基板本体１０ａの下部に櫛歯状（矩形波状）に複数の凸部１０ｄが配列された加工前基板２５を用意する。
この加工前基板２５は、図７（ｂ）に示すようにフラット基板であって、その上面には所定の回路パターン（図示せず）がプリント形成されている。
このフラットな状態の加工前基板２５において、ＬＥＤ素子８、チップ抵抗９等が所定の回路パターン上に取り付けられる。
尚、ＬＥＤ素子８は、一列の配列された複数の凸部１０ｄにおいて、その取り付けの位置が交互に異なるようになされる（即ち、基板面１０ｅが形成される位置と、基板面１０ｆが形成される位置とに交互に配置される）。 Next, a method for forming the annular light source substrate 10 will be described.
When the light source substrate 10 is formed, as shown in FIG. 7A, a pre-processing substrate 25 is prepared in which a plurality of convex portions 10d are arranged in a comb-like shape (rectangular wave shape) below the elongated strip-shaped substrate body 10a. To do.
The pre-processing substrate 25 is a flat substrate as shown in FIG. 7B, and a predetermined circuit pattern (not shown) is printed on the upper surface thereof.
On the flat unprocessed substrate 25, the LED element 8, the chip resistor 9 and the like are mounted on a predetermined circuit pattern.
The LED elements 8 are arranged so that the mounting positions of the plurality of convex portions 10d arranged in a row are alternately different (that is, the position where the substrate surface 10e is formed and the substrate surface 10f are formed). Alternate with each other).

また、この加工前基板２５は、屈曲及び湾曲可能な金属ベース基板からなり、例えば、図８に示すような層構造となされている。即ち、ベース層として、金属層１１を有する。この金属層１１は、屈曲及び湾曲を可能とするために、例えば、鉄（Ｆｅ）を主成分とする鋼板１１ａを有し、その上部、及び下部に溶融アルミニウム１１ｂがコーティングされてなる。尚、この溶融アルミニウム１１ｂのコーティング処理は、基板の放熱性（熱伝導性）を向上させるために施される。
また、この金属層１１は、所定の厚さ寸法を有することにより、屈曲及び湾曲した形状を維持できるようになされている。
また、金属層１１の上部、及び下部には、粒径１〜１５μｍの粉末アルミニウムを分散してなる可撓性を有する放熱金属層１２（放熱層）と、同じく可撓性を有する放熱樹脂層１３（放熱層）とが形成されている。
また、上部の放熱樹脂層１３の上部には、接着層１４を介して配線用銅層１５（回路パターン）が形成され、下部の放熱樹脂層１３の下部には、ポリエステル組成物からなる保護層１６が形成されている。 The pre-processing substrate 25 is made of a metal base substrate that can be bent and curved, and has a layer structure as shown in FIG. 8, for example. That is, the metal layer 11 is provided as a base layer. In order to bend and bend, the metal layer 11 has, for example, a steel plate 11a mainly composed of iron (Fe), and the upper and lower portions thereof are coated with molten aluminum 11b. The coating process of the molten aluminum 11b is performed in order to improve the heat dissipation (thermal conductivity) of the substrate.
Further, the metal layer 11 has a predetermined thickness dimension so that a bent and curved shape can be maintained.
Moreover, on the upper part and the lower part of the metal layer 11, a flexible heat radiating metal layer 12 (heat radiating layer) obtained by dispersing powdered aluminum having a particle diameter of 1 to 15 μm, and a flexible heat radiating resin layer. 13 (heat radiation layer) is formed.
Further, a wiring copper layer 15 (circuit pattern) is formed on the upper portion of the heat dissipation resin layer 13 via an adhesive layer 14, and a protective layer made of a polyester composition is formed on the lower portion of the lower heat dissipation resin layer 13. 16 is formed.

このような層構造とすることにより、加工前基板２５を屈曲及び湾曲加工することが可能となる。
即ち、先ず、治具（図示せず）を用いて、図９（ａ）、（ｂ）に示すように凸部１０ｄを二段階に屈曲加工し、その断面が略Ｌ字形とする。これにより凸部１０ｄにおいて基板面１０ｅと基板面１０ｆとが形成される。
次いで、他の治具（図示せず）を用いて、加工前基板２５を略円環状に湾曲加工することにより、図１０（下面図）、図１１（側面図）に示すような光源基板１０を得ることができる。 With such a layer structure, the unprocessed substrate 25 can be bent and curved.
That is, first, using a jig (not shown), the convex portion 10d is bent in two stages as shown in FIGS. 9A and 9B, and the cross section thereof is formed into an approximately L shape. Thereby, the substrate surface 10e and the substrate surface 10f are formed in the convex portion 10d.
Next, the light source substrate 10 as shown in FIG. 10 (bottom view) and FIG. 11 (side view) is obtained by bending the unprocessed substrate 25 into a substantially annular shape using another jig (not shown). Can be obtained.

以上のように本発明に係る実施の形態によれば、光源基板１０において円環状に複数設けられた、垂直下方に臨む基板面１０ｅと外側斜め下方に臨む基板面１０ｆとにＬＥＤ素子８が配置される。
このようなＬＥＤ素子を設置することにより、照明装置の垂直下方と、外側斜め下方とにＬＥＤの発光方向が円状に分散され、下方の空間に一様に照射することができ、光の斑の発生を抑制することができる。 As described above, according to the embodiment of the present invention, the LED elements 8 are arranged on the substrate surface 10e facing the vertically lower side and the substrate surface 10f facing the lower outer side, which are provided in a plurality of annular shapes in the light source substrate 10. Is done.
By installing such an LED element, the light emitting direction of the LED is distributed in a circular shape vertically below the lighting device and obliquely below the outside, so that the space below can be illuminated uniformly, and light spots Can be suppressed.

また、蛇腹形状のヒートシンク２０の外周部が光源基板１０の内周部に接触した状態となされるため、ＬＥＤ素子８の発光により生じる熱は、光源基板１０を介してヒートシンク２０へと効率よく伝わり、放熱面積が大きいヒートシンク２０によって効果的に放熱することができる。また、ガラス管２内部の熱は、ガラス管２上部の放熱孔３ａから効率的に放熱することができ、ＬＥＤ素子８への熱による悪影響をより軽減することができる。
また、光源基板１０は、屈曲可能な層構造により形成されるため、凸部１０ｄにおける基板面１０ｅ、１０ｆの臨む方向の調整を独立して容易に行うことができ、設置場所に応じてＬＥＤ光の放射角度を変えることができる。 Further, since the outer peripheral portion of the bellows-shaped heat sink 20 is in contact with the inner peripheral portion of the light source substrate 10, the heat generated by the light emission of the LED element 8 is efficiently transmitted to the heat sink 20 via the light source substrate 10. The heat sink 20 having a large heat radiation area can effectively radiate heat. Further, the heat inside the glass tube 2 can be efficiently radiated from the heat radiating holes 3 a above the glass tube 2, and adverse effects due to heat on the LED elements 8 can be further reduced.
Further, since the light source substrate 10 is formed with a bendable layer structure, the direction in which the substrate surfaces 10e and 10f face the convex portion 10d can be easily adjusted independently, and the LED light can be selected according to the installation location. The radiation angle can be changed.

尚、前記実施の形態においては、照明管としてガラス管２を例に説明したが、本発明の照明装置にあっては、それに限定されず、照明管としてプラスチック管を用いてもよい。
また、前記ガラス管２は、光拡散のために粉末状の微粒子がベーキングにより付着加工されているものとしたが、それに限定されず、本発明に係る照明管にあっては、その材質に拘わらず、表面に梨地加工が施されたものを用いてもよい。 In the above embodiment, the glass tube 2 is described as an example of the illumination tube. However, the illumination device of the present invention is not limited to this, and a plastic tube may be used as the illumination tube.
Further, the glass tube 2 is such that powdery fine particles are adhered and processed by baking for light diffusion. However, the present invention is not limited to this, and the lighting tube according to the present invention is not limited to the material. Instead, a material with a satin finish on the surface may be used.

また、前記実施の形態においては、光源基板１０の下部に設けられた凸部１０ｄは、径方向に向けて二段階に屈曲されているものとしたが、二段階の屈曲に限定されるものではない。例えば、凸部１０ｄを三段階以上屈曲させ、異なる方向に臨む基板面を複数設け、それら異なる基板面にＬＥＤ素子８を配置してもよい。
或いは、凸部１０ｄを屈曲させるのではなく、径方向に円弧状に湾曲させることにより、異なる方向に臨む基板面を複数設け、それら異なる基板面にＬＥＤ素子８を配置してもよい。 Moreover, in the said embodiment, although the convex part 10d provided in the lower part of the light source board | substrate 10 shall be bent in two steps toward radial direction, it is not limited to two steps of bending. Absent. For example, the convex portion 10d may be bent at three or more stages, a plurality of substrate surfaces facing different directions may be provided, and the LED elements 8 may be arranged on these different substrate surfaces.
Alternatively, instead of bending the convex portion 10d, a plurality of substrate surfaces facing different directions may be provided by curving in an arc shape in the radial direction, and the LED elements 8 may be arranged on these different substrate surfaces.

更に、前記実施の形態においては、光源基板１０の下部に設けられた凸部１０ｄは、径方向に向けて二段階に屈曲されているものとしたが、図１２に示すように、径方向に向けて一段階に屈曲されるものであっても良い。即ち、図１２に示す光源基板１０のように、光源基板１０の下部に凸部１０ｄを設け、屈曲させる凸部１０ｄと、屈曲させない凸部１０ｄとが交互に配置されるようになしても良い。 Furthermore, in the above embodiment, the convex portion 10d provided at the lower portion of the light source substrate 10 is bent in two stages toward the radial direction. However, as shown in FIG. It may be bent in one step. That is, as in the light source substrate 10 shown in FIG. 12, the convex portion 10d may be provided at the lower portion of the light source substrate 10, and the convex portion 10d to be bent and the convex portion 10d not to be bent may be alternately arranged. .

このようなＬＥＤ素子８の設置パターンによれば、照明装置１の水平方向と、外側斜め下方とにＬＥＤの発光方向が円状に分散され、水平、下方の空間に一様に照射することができ、光の斑の発生を抑制することができる。
尚、前記実施の形態及び図１２に示した光源基板にあっては、凸部１０ｄが光源基板の下部に設けられた場合を示したが、凸部１０ｄが光源基板の上部に設けられたものであっても良い。 According to such an installation pattern of the LED elements 8, the light emission direction of the LEDs is distributed in a circular shape in the horizontal direction of the illumination device 1 and obliquely below the outer side, and the horizontal and lower spaces can be uniformly irradiated. And the occurrence of light spots can be suppressed.
In the light source substrate shown in the above embodiment and FIG. 12, the case where the convex portion 10d is provided at the lower portion of the light source substrate is shown, but the convex portion 10d is provided at the upper portion of the light source substrate. It may be.

また、図１３（ａ）に示すように、光源基板１０の下部に凸部１０ｄを形成し、基板本体にＬＥＤ素子８を設けると共に、凸部１０ｄにＬＥＤ素子８を設け、図１３（ｃ）に示すように、前記凸部１０ｄを径方向に向けて屈曲するように構成しても良い。
このようなＬＥＤ素子８の設置パターンによれば、照明装置１の水平方向と、外側斜め下方とにＬＥＤの発光方向が円状に分散され、水平、下方の空間に一様に照射することができ、光の斑の発生を抑制することができる。 Further, as shown in FIG. 13A, a convex portion 10d is formed in the lower portion of the light source substrate 10, the LED element 8 is provided on the substrate body, and the LED element 8 is provided on the convex portion 10d. As shown in FIG. 6, the convex portion 10d may be configured to bend in the radial direction.
According to such an installation pattern of the LED elements 8, the light emission direction of the LEDs is distributed in a circular shape in the horizontal direction of the illumination device 1 and obliquely below the outer side, and the horizontal and lower spaces can be uniformly irradiated. And the occurrence of light spots can be suppressed.

更に、前記実施の形態においては、光源基板１０の下部に設けられた凸部１０ｄを形成した場合を示したが、図１４（ａ）（ｂ）に示すように、光源基板１０の上部、下部に凸部１０ｄを形成し、各凸部１０ｄにＬＥＤ素子８を設置しても良い。
即ち、図１４（ｃ）に示す光源基板１０のように、光源基板１０の上部及び下部に凸部１０ｄを設け、上部凸部１０ｄを所定角度θ２に屈曲させ、また上部凸部１０ｄの屈曲角度θ２と異なる角度θ１に屈曲させた下部凸部１０ｄとを交互に配置するようになしても良い。
このようなＬＥＤ素子８の設置パターンによれば、照明装置１の外側斜め下方にＬＥＤの発光方向が円状に分散され、下方の空間により一様に照射することができ、光の斑の発生を抑制することができる。
尚、図１４（ｃ）に示すように、上部凸部１０ｄの屈曲角度θ２を、下部凸部１０ｄの屈曲角度θ１よりも小さな角度になすことにより、より広範囲の下方空間を照らすことができる。 Furthermore, in the above-described embodiment, the case where the convex portion 10d provided at the lower portion of the light source substrate 10 is formed is shown. However, as shown in FIGS. The protrusions 10d may be formed on the LED elements 8, and the LED elements 8 may be installed on the protrusions 10d.
That is, like the light source substrate 10 shown in FIG. 14C, the convex portions 10d are provided on the upper and lower portions of the light source substrate 10, the upper convex portion 10d is bent at a predetermined angle θ2, and the bending angle of the upper convex portion 10d. Lower convex portions 10d bent at an angle θ1 different from θ2 may be alternately arranged.
According to such an installation pattern of the LED elements 8, the light emission direction of the LEDs is distributed in a circular shape obliquely downward and outward of the lighting device 1, and it can be illuminated uniformly in the lower space, and light spots are generated. Can be suppressed.
As shown in FIG. 14 (c), a wider range of the lower space can be illuminated by making the bending angle θ2 of the upper convex portion 10d smaller than the bending angle θ1 of the lower convex portion 10d.

また、図１５に示すように、光源基板１０の上部、下部に凸部１０ｄを形成し、各凸部１０ｄ及び基板本体１０ａに、連続するように順次、ＬＥＤ素子８を設置しても良い。
即ち、図１５に示す光源基板１０のように、光源基板１０の上部及び下部に凸部１０ｄを設け、上部凸部１０ｄ、基板本体１０ａ、下部凸部１０ｄ、基板本体１０ａ、上部凸部１０ｄと、連続するように順次、ＬＥＤ素子８を設置する。そして、上部凸部１０ｄを所定角度θ２に屈曲させ、また上部凸部１０ｄの屈曲角度θ２と異なる角度θ１に屈曲させる。 Moreover, as shown in FIG. 15, the convex part 10d may be formed in the upper part and the lower part of the light source board | substrate 10, and the LED element 8 may be sequentially installed so that it may continue in each convex part 10d and the board | substrate body 10a.
That is, like the light source substrate 10 shown in FIG. 15, the convex portions 10d are provided on the upper and lower portions of the light source substrate 10, and the upper convex portion 10d, the substrate main body 10a, the lower convex portion 10d, the substrate main body 10a, the upper convex portion 10d, The LED elements 8 are sequentially installed so as to be continuous. Then, the upper convex portion 10d is bent at a predetermined angle θ2, and is bent at an angle θ1 different from the bending angle θ2 of the upper convex portion 10d.

このようなＬＥＤ素子８の設置パターンによれば、照明装置１の、水平方向、外側斜め下方にＬＥＤの発光方向が円状に分散され、水平、下方の空間に一様に照射することができ、光の斑の発生を抑制することができる。
尚、図１５（ｃ）に示すように、上部凸部１０ｄの屈曲角度θ２を、下部凸部１０ｄの屈曲角度θ１よりも小さな角度になすことにより、より広範囲の下方空間を照らすことができる。 According to such an installation pattern of the LED elements 8, the light emission direction of the LEDs is distributed in a circular shape in the horizontal direction and obliquely downward on the outer side of the lighting device 1, and the horizontal and lower spaces can be uniformly irradiated. , The occurrence of light spots can be suppressed.
As shown in FIG. 15 (c), a wider range of the lower space can be illuminated by making the bending angle θ2 of the upper convex portion 10d smaller than the bending angle θ1 of the lower convex portion 10d.

また、図１３、図１５に示された光源基板１０の例にあっては、基板本体１０ａにＬＥＤ素子８を設置し、照明装置１の水平方向の空間を照射できるように構成されている。
この基板本体１０ａにＬＥＤ素子８を設置した場合であっても、照明装置１の下方向の空間を照射できるように構成された場合を図１６、図１７に示す。
図１６及び図１７に示すように、光源基板１０は、１枚の長尺帯状の基板本体１０ａと、基板本体１０ａの下部あるいは上部に、矩形波状に複数の凸部１０ｄが周方向に配列されている。そして、長尺帯状の基板本体１０ａに折曲げ線１０ｇを形成する。この折曲げ線１０ｇは、凸部１０ｄの一端部から相対向する辺まで延設され、前記辺において折り返し、更に前記凸部１０ｄに隣接する凸部１０ｄの端部まで延設される。 Moreover, in the example of the light source board | substrate 10 shown by FIG. 13, FIG. 15, the LED element 8 is installed in the board | substrate body 10a, and it is comprised so that the horizontal space of the illuminating device 1 can be irradiated.
Even when the LED element 8 is installed on the substrate body 10a, FIGS. 16 and 17 show a case where it is configured to irradiate the downward space of the lighting device 1. FIG.
As shown in FIGS. 16 and 17, the light source substrate 10 has a single long strip-shaped substrate body 10a and a plurality of convex portions 10d arranged in a rectangular shape in the circumferential direction on the lower or upper portion of the substrate body 10a. ing. Then, a bending line 10g is formed on the long belt-like substrate body 10a. The fold line 10g extends from one end of the convex portion 10d to the opposite side, is folded at the side, and further extends to the end of the convex portion 10d adjacent to the convex portion 10d.

そして、基板本体１０ａの折曲げ線１０ｇ、及び凸部１０ｄの折曲げ線１０ｈで折り曲げることにより、図１７に示すように、基板本体１０ａのＬＥＤ素子８の設置によって、照明装置１の下方向及び斜め下方向の空間を照射する。
尚、図１７は、基板本体のＬＥＤ素子８の設置状態を見易くするため、上下反対に図示されている。即ち、ＬＥＤ素子８は、下方向の空間を照射するように配置されている。 Then, by bending the folding line 10g of the substrate body 10a and the folding line 10h of the convex portion 10d, as shown in FIG. Irradiate the space in the diagonally downward direction.
Note that FIG. 17 is shown upside down in order to make it easier to see the installation state of the LED elements 8 of the substrate body. That is, the LED element 8 is disposed so as to irradiate a downward space.

また、図１８に示すように、図１６、図１７の凸部１０ｄを、光源基板１０の下部に設け、径方向に向けて二段階に屈曲するように構成しても良い。この場合、二段階に屈曲した夫々の面にＬＥＤ素子８を設置される共に、一段階に屈曲できる面にもＬＥＤ素子８が設置される。 Further, as shown in FIG. 18, the convex portion 10d shown in FIGS. 16 and 17 may be provided at the lower portion of the light source substrate 10 and bend in two stages toward the radial direction. In this case, the LED element 8 is installed on each surface bent in two stages, and the LED element 8 is installed on a surface that can be bent in one stage.

また、上記実施形態にあっては、図１９（ａ）に示すように、略円環状の光源基板１０に、複数のＬＥＤ素子８に安定した給電を行うための電源回路基板３０（給電手段）が電気的に接続されている。
しかしながら、本発明はこれに限定されるものではなく、図１９（ｂ）に示すように、光源基板１０内に、複数のＬＥＤ素子８に安定した給電を行うための電源回路３１を形成しても良い。このように、光源基板１０内に電源回路３１を形成する場合には、電源回路３１を形成するための基板が不要となり、コスト的に安価に生産することができる。 Further, in the above embodiment, as shown in FIG. 19A, a power supply circuit board 30 (feeding means) for stably feeding a plurality of LED elements 8 to a substantially annular light source board 10. Are electrically connected.
However, the present invention is not limited to this, and as shown in FIG. 19B, a power supply circuit 31 for stably supplying power to the plurality of LED elements 8 is formed in the light source substrate 10. Also good. Thus, when forming the power supply circuit 31 in the light source board | substrate 10, the board | substrate for forming the power supply circuit 31 becomes unnecessary, and it can manufacture cheaply in cost.

また、上記実施形態にあっては、図１９（ａ）に示すように、略円環状の光源基板１０を用いているが、電源回路３１を備える光源基板１０を、図２０に示すように、多角形（例えば、６角形）に形成しても良い。また、光源基板１０と電源回路基板３０とで、多角形（例えば、６角形）に形成しても良い。 Moreover, in the said embodiment, as shown to Fig.19 (a), although the substantially annular light source substrate 10 is used, the light source substrate 10 provided with the power supply circuit 31 is shown in FIG. You may form in a polygon (for example, hexagon). Further, the light source substrate 10 and the power supply circuit substrate 30 may be formed in a polygon (for example, a hexagon).

更に、照明装置１内には、図２１に示すように、ＬＥＤ素子８が設置された光源基板１０のみを配置し、照明装置１の外部に電源回路基板３０を設けるようにしても良い。
このように照明装置１の外部に電源回路基板３０が設けているため、ＬＥＤ素子に比べて耐久寿命が短い、電源回路を構成する、気部品（例えば、電界コンデンサ）等が破損した場合にも、電源回路基板３０を容易に交換することができる。 Further, as shown in FIG. 21, only the light source substrate 10 on which the LED elements 8 are installed may be arranged in the lighting device 1, and the power circuit board 30 may be provided outside the lighting device 1.
Since the power supply circuit board 30 is provided outside the lighting device 1 in this way, the durability life is shorter than that of the LED element, and even when an air component (for example, an electric field capacitor) constituting the power supply circuit is damaged. The power supply circuit board 30 can be easily replaced.

また、上記実施形態にあっては、一つの基板で略円環状の光源基板１０を構成した場合を示したが、図２２に示すように、複数の基板（例えば２枚の基板）で略円環状の光源基板１０を構成しても良い。
このように、複数の基板（例えば２枚の基板）で略円環状の光源基板１０を構成した場合には、基板が短いため、照明装置１への取付けを容易に行うことができる。また、一つの光源基板１０に不具合が発生した場合には、その光源基板のみを交換することができ、コスト的安価に修理することができる。 Further, in the above embodiment, the case where the substantially annular light source substrate 10 is configured by one substrate is shown, but as shown in FIG. 22, a plurality of substrates (for example, two substrates) are approximately circular. An annular light source substrate 10 may be configured.
Thus, when the substantially annular light source substrate 10 is configured by a plurality of substrates (for example, two substrates), since the substrate is short, it can be easily attached to the illumination device 1. Further, when a failure occurs in one light source substrate 10, only the light source substrate can be replaced, and repair can be made at low cost.

更に、電源回路基板３０についても、図２３に示すように、複数の基板（例えば２枚の基板）で電源回路基板３０を構成しても良い。例えば、図２３に示すように、２つの光源基板１０に対して、２つの電源回路基板が設けられている場合には、一の光源基板１０に一の電源回路基板が電気的に接続され、他の光源基板１０に他の電源回路基板が電気的に接続されるように構成しても良い。 Furthermore, as for the power supply circuit board 30, as shown in FIG. 23, the power supply circuit board 30 may be composed of a plurality of boards (for example, two boards). For example, as shown in FIG. 23, when two power circuit boards are provided for two light source boards 10, one power circuit board is electrically connected to one light source board 10, Another power supply circuit board may be electrically connected to the other light source board 10.

また、前記実施の形態においては、金属層１１は、屈曲及び湾曲可能とするために、鉄（Ｆｅ）を主成分とする鋼板１１ａが用いられたものとしたが、それに限定されず、その他の金属材料（例えば、銅、アルミニウム等）が用いられたものであってもよい。 Moreover, in the said embodiment, in order to bend and bend the metal layer 11, although the steel plate 11a which has iron (Fe) as a main component was used, it is not limited to it, Other A metal material (for example, copper, aluminum, etc.) may be used.

１照明装置
２ガラス管（照明管）
３上カバー
３ａ放熱孔
４下カバー
５螺子
６電極ピン
７コネクタ
８ＬＥＤ素子
９チップ抵抗
１０光源基板
１０ａ基板本体
１０ｂ端部
１０ｃ端部
１０ｄ凸部
１０ｅ基板面
１０ｆ基板面
１１金属層
１２放熱金属層（放熱層）
１３放熱樹脂層（放熱層）
１４接着層
１５配線用銅層（回路パターン）
２０ヒートシンク
２５加工前基板（金属ベース基板）
３０電源回路基板（給電手段） 1 Lighting device 2 Glass tube (lighting tube)
3 Upper cover 3a Heat dissipation hole 4 Lower cover 5 Screw 6 Electrode pin 7 Connector 8 LED element 9 Chip resistor 10 Light source substrate 10a Substrate body 10b End portion 10c End portion 10d Projection portion 10e Substrate surface 10f Substrate surface 11 Metal layer 12 Heat dissipation metal layer (Heat dissipation layer)
13 Heat dissipation resin layer (heat dissipation layer)
14 Adhesive layer 15 Copper layer for wiring (circuit pattern)
20 Heat sink 25 Substrate before processing (metal base substrate)
30 Power circuit board (power supply means)

Claims

A light source substrate in which a long belt-like substrate is curved in a substantially annular shape;
A plurality of LED (light emitting diode) elements disposed on the light source substrate;
A power supply means that is electrically connected to the light source substrate and supplies power to the LED element;
A heat sink that is curved and formed in a substantially annular shape as a whole, accommodated on the inner peripheral side of the light source substrate, with the outer peripheral portion in contact with the inner peripheral portion of the light source substrate ;
A plurality of convex portions are arranged in a rectangular wave shape along the circumferential direction on either the lower portion or the upper portion of the light source substrate, or on the lower portion and the upper portion,
The convex portion is curved or bent toward the radial direction, whereby a substrate surface facing a specific direction is formed on the convex portion,
The LED (light emitting diode) element is disposed on the substrate surface facing the specific direction,
At least the light source substrate and the heat sink are accommodated in an annular illumination tube made of light-transmitting glass or plastic, and a plurality of heat radiation holes are provided on the illumination tube. A lighting device.

2. The lighting device according to claim 1, wherein the heat sink is bent and formed in a bellows shape having a rectangular wave shape in plan view, and the entire heat sink is bent in a substantially annular shape.

The lighting device according to claim 1, wherein an LED (light emitting diode) element is disposed on a main body of the light source substrate between the convex portions.

The lighting device according to claim 2, wherein the light source substrate body is bent and an LED (light emitting diode) element installed on the light source substrate body faces obliquely downward on the outside.

The plurality of convex portions are curved or bent toward the radial direction, respectively, so that the first specific surface facing the first specific direction and the second specific direction different from the first specific direction are provided. Forming a second substrate surface facing the direction;
The lighting device according to any one of claims 1 to 4 , wherein the LED (light emitting diode) element is disposed on the first substrate surface and the second substrate surface.

In the plurality of convex portions,
A plurality of convex portions arranged at the lower portion of the light source substrate form a first substrate surface facing the first specific direction, and a plurality of convex portions arranged at the upper portion of the light source substrate have a second specific direction. Forming a second substrate surface to face,
The lighting device according to claim 5 , wherein an LED (light emitting diode) element is installed on the first substrate surface and the second substrate surface.

The lighting device according to claim 1, wherein the power supply unit includes a power supply circuit, and the power supply circuit is formed in a light source substrate.

The lighting device according to claim 1, wherein the light source substrate includes a plurality of substrates, and is configured as a light source substrate having a substantially annular shape by combining a plurality of substrates constituting the light source substrate.