JP2006313727A - Compact bulb type lamp - Google Patents

Compact bulb type lamp Download PDF

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JP2006313727A
JP2006313727A JP2005269017A JP2005269017A JP2006313727A JP 2006313727 A JP2006313727 A JP 2006313727A JP 2005269017 A JP2005269017 A JP 2005269017A JP 2005269017 A JP2005269017 A JP 2005269017A JP 2006313727 A JP2006313727 A JP 2006313727A
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light source
peripheral
heat
substrate
source substrate
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JP4849305B2 (en
Inventor
Kazuto Morikawa
和人 森川
Shigeru Osawa
滋 大澤
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Toshiba Lighting & Technology Corp
東芝ライテック株式会社
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/02Globes; Bowls; Cover glasses characterised by the shape
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/238Arrangement or mounting of circuit elements integrated in the light source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00Fastening of light sources or lamp holders
    • F21V19/001Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0055Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by screwing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/001Arrangement of electric circuit elements in or on lighting devices the elements being electrical wires or cables
    • F21V23/002Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/006Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact bulb type lamp which can suppress efficiently temperature rise of a light source and is capable of realizing operation reliability of a lighting circuit with small size and suppressing deterioration of its lifetime. <P>SOLUTION: The compact bulb type lamp includes a metallic enclosure member 3 having a peripheral part exposed to the outside, a light source installation part formed integrally with this peripheral part, and a recessed part formed inside the peripheral part, a base 31 arranged at the opening edge part of the recessed part, a light source substrate 12 on which the point light source is mounted and which is installed at the outside of the light source installation part so as to heat-conduct to the light source installation part, a fixing member 13 which is installed at the nearly center of the light source substrate and fixes the light source substrate to the enclosure member, and a lighting circuit 21 which has a circuit component, a lead wire of which one end is electrically connected to the circuit component and the other end is electrically connected to the light source and which is fixed to the peripheral part of the light source substrate, and a circuit board to which the lead wire and the circuit component are installed, and which is housed in the recessed part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えばLED(発光ダイオード)等の発光素子を光源として用いた電球型ランプに関する。   The present invention relates to a light bulb type lamp using a light emitting element such as an LED (light emitting diode) as a light source.
LEDは、その温度が上昇するに従い、光出力の低下とともに寿命も短くなることが知られている。このため、LEDを光源とするランプでは、LEDの温度上昇を抑制することが求められている。   It is known that the lifetime of an LED shortens as the light output decreases as its temperature rises. For this reason, in the lamp | ramp which uses LED as a light source, it is calculated | required to suppress the temperature rise of LED.
従来、こうした要請に配慮して、LEDから伝わる熱を外部に放出するための放熱部を備え、この放熱部を外部に露出させたLED電球が知られている(例えば、特許文献1参照。)。   Conventionally, in consideration of such a demand, an LED bulb that includes a heat radiating portion for releasing heat transmitted from the LED to the outside and exposes the heat radiating portion to the outside is known (for example, see Patent Document 1). .
この特許文献1のLED電球は、略球体の内部に設けた金属基板の外面にLEDを実装している。略球体は、一端に口金が設けられ、他端の開口部に向けてラッパ状をなす金属製放熱部と、前記開口部に取付けられた透光性カバーとにより形成されている。金属基板は、絶縁性を有する高熱伝導部材を介して前記開口部に固着されている。   In the LED bulb of Patent Document 1, an LED is mounted on the outer surface of a metal substrate provided in a substantially spherical body. The substantially spherical body is formed of a metal heat dissipating portion having a cap at one end and a trumpet shape toward the opening at the other end, and a translucent cover attached to the opening. The metal substrate is fixed to the opening through an insulating high heat conductive member.
これにより、LED電球の点灯中にLEDが発生した熱は、金属基板から高熱伝導部材を介してラッパ状の金属製放熱部に伝えられ、この放熱部の外周面から外部に放出されるので、LEDの温度上昇を抑制できる。
特開2001−243809号公報(段落0005、0011−0013、図1)
Thereby, the heat generated by the LED during the lighting of the LED bulb is transmitted from the metal substrate to the trumpet-shaped metal heat dissipating part through the high heat conducting member, and is released to the outside from the outer peripheral surface of this heat dissipating part. LED temperature rise can be suppressed.
JP 2001-243809 (paragraphs 0005, 0011-0013, FIG. 1)
特許文献1の技術では、LED電球の外部に露出する放熱部と、LEDが直に実装された金属基板とが別部材である。このため、両者が高熱伝導部材を介して固着されているといえども、金属基板から放熱部への熱伝導経路では、高熱伝導部材と金属基板との間、及び高熱伝導部材と放熱部との間で、夫々熱抵抗が生じる。したがって、LEDの温度上昇を抑制する上では改善の余地がある。   In the technique of Patent Document 1, the heat radiation part exposed to the outside of the LED bulb and the metal substrate on which the LED is directly mounted are separate members. For this reason, even though both are fixed via the high heat conduction member, in the heat conduction path from the metal substrate to the heat radiating portion, between the high heat conduction member and the metal substrate and between the high heat conduction member and the heat radiating portion. In between, thermal resistance occurs. Therefore, there is room for improvement in suppressing the temperature rise of the LED.
また、特許文献1では、LEDを点灯させるための点灯回路について言及した記載がない。また、点灯回路をLED電球に設ける場合、それによってLED電球が軸方向に大きくならないようにすることが要請されている。更に、一般的に、点灯回路の温度が異常に上昇すると、この回路の動作信頼性及び寿命を損なう恐れがあることは知られている。このため、点灯回路をLED電球に設ける場合には、点灯回路の温度が異常に上昇しないようにすることも要請される。しかし、これらの要請は特許文献1では満たすことができない。   Moreover, in patent document 1, there is no description which mentioned the lighting circuit for lighting LED. In addition, when the lighting circuit is provided in the LED bulb, it is required that the LED bulb does not increase in the axial direction. Furthermore, it is generally known that if the temperature of the lighting circuit rises abnormally, the operation reliability and life of the circuit may be impaired. For this reason, when providing a lighting circuit in an LED bulb, it is also required to prevent the temperature of the lighting circuit from rising abnormally. However, these requests cannot be satisfied by Patent Document 1.
本発明の目的は、光源の温度上昇を効果的に抑制できるとともに、小形化を図りつつ、点灯回路の動作信頼性及び寿命の低下を抑制できる電球型ランプを提供することにある。   An object of the present invention is to provide a light bulb type lamp that can effectively suppress a temperature rise of a light source and can suppress a reduction in operation reliability and lifetime of a lighting circuit while achieving miniaturization.
請求項1の発明は、外部に露出する周部、この周部に一体に形成された光源取付け部および前記周部の内側に形成された凹部を有する金属製の外郭部材と;前記凹部の開口縁部側に配設された口金と;点状光源を実装し、前記光源取付け部に熱伝導するようにこの光源取付け部の外面に装着された光源基板と;光源基板のほぼ中心部に設けられ、前記光源基板を前記外郭部材に固着させる固定部材と;回路部品と、一端が回路部品に電気的に接続され他端が前記光源に電気的に接続されるともに前記光源基板の周辺部に固着されるリード線と、リード線および回路部品を取付けてなる回路基板を有し、前記凹部に収容される点灯回路と;を具備することを特徴とする電球型ランプ。   According to a first aspect of the present invention, there is provided a metal outer member having a peripheral portion exposed to the outside, a light source mounting portion formed integrally with the peripheral portion, and a concave portion formed inside the peripheral portion; and an opening of the concave portion A base disposed on the edge side; a light source board on which a point light source is mounted and mounted on the outer surface of the light source mounting part so as to conduct heat to the light source mounting part; provided at substantially the center of the light source board A fixing member for fixing the light source substrate to the outer member; a circuit component, one end of which is electrically connected to the circuit component and the other end is electrically connected to the light source, and at the periphery of the light source substrate A light-bulb lamp comprising: a lead wire to be fixed; and a lighting circuit having a circuit board on which the lead wire and circuit components are attached and housed in the recess.
この発明で、外郭部材をなす金属には、鉄及びその合金、これらよりも熱伝導性が良い金属例えば銅及びその合金、更に、鉄及びその合金などより軽い軽金属例えばアルミニウム及びその合金等を使用できる。   In the present invention, iron and its alloys, metals having better thermal conductivity than these, such as copper and its alloys, and lighter metals such as iron and its alloys, such as aluminum and its alloys, are used as the metal constituting the outer member. it can.
この発明で、外郭部材の放熱面積を増やすための構成として、外郭部材の周部に、ローレット加工を施してその外周面を粗面とすることは可能であり、これに代えて放熱フィンを形成することも可能である。更に、外郭部材の周部の外周面を防錆のための保護膜でコーテングしてもよく、この場合、黒色の保護膜をコーテングすれば、外郭部材から外部への熱輻射を更に向上できる点で好ましい。   In this invention, as a configuration for increasing the heat radiation area of the outer member, it is possible to roughen the outer peripheral surface by applying knurling to the peripheral portion of the outer member, and instead form a heat radiating fin. It is also possible to do. Furthermore, the outer peripheral surface of the outer periphery of the outer member may be coated with a protective film for rust prevention. In this case, if the black protective film is coated, the heat radiation from the outer member to the outside can be further improved. Is preferable.
この発明で、外郭部材に一体に形成された光源取付け部は、凹部の奥壁を兼ねていても良く、或いは、この奥壁から更に軸方向に沿ってカバーの内面方向に延びる凸部で形成することもできる。   In this invention, the light source mounting portion formed integrally with the outer member may also serve as the back wall of the recess, or is formed by a protrusion extending further from the back wall along the axial direction toward the inner surface of the cover. You can also
この発明で、点状光源には、電気エネルギーを光に変換する発光素子、例えば半導体発光素子とも称される発光ダイオード(LED)を好適に用いることができるが、エレクトリックルミネッセンス素子(EL素子)を用いることも可能であり、また、使用する点状光源の数は1以上であればよい。   In the present invention, a light emitting element that converts electrical energy into light, for example, a light emitting diode (LED), also referred to as a semiconductor light emitting element, can be suitably used as the point light source, but an electric luminescence element (EL element) is used. The number of point light sources to be used may be one or more.
この発明で、透光性カバーは、主に充電部をなす点状光源に対して他のものが接触することを妨げるため等に設けられるものであって、グローブ形状をなしていても、フラット状をなしていてもよい。このカバーがグローブである場合、その内面の一部に反射膜を設けることは妨げないとともに、カバーの形状は点状光源が発した光を例えば拡散または集光させるために任意形状とすることができる。更に、透光性カバーとして、点状光源が発した光を集光または拡散させるためのレンズを用いることも可能である。   In this invention, the translucent cover is provided to prevent other objects from coming into contact with the point light source that mainly forms the charging unit, and is flat even if it has a glove shape. It may have a shape. When this cover is a globe, it is not hindered to provide a reflective film on a part of its inner surface, and the shape of the cover may be any shape to diffuse or condense light emitted from a point light source, for example. it can. Furthermore, it is also possible to use a lens for condensing or diffusing the light emitted from the point light source as the translucent cover.
この発明で、点灯回路は凹部に収容されるものであるが、その一部が口金の内側に収容される状態に配置されていてもよい。この発明で、絶縁部材には、合成樹脂例えばPP(ポリプロピレン)またはPBT(ポリブチレンテレフタレート)などを好適に用いることができる。   In the present invention, the lighting circuit is housed in the recess, but a part of the lighting circuit may be placed inside the base. In the present invention, a synthetic resin such as PP (polypropylene) or PBT (polybutylene terephthalate) can be suitably used for the insulating member.
請求項1の発明では、固定部材は光源基板のほぼ中心部に設けられ、前記光源基板を前記外郭部材に固着させ、リード線は、その一端が回路部品に電気的に接続され、他端が前記光源に電気的に接続されるともに前記光源基板の周辺部に固着されているので、光源基板の中心部は固定部材により、また、周辺部はリード線により外郭部材に固定されているので、光源基板は、金属製外郭部材に密着して点状光源の熱を外郭部材の周部に伝導させて、効率良くこの周部から外部に放出できる。   According to the first aspect of the present invention, the fixing member is provided at substantially the center of the light source substrate, the light source substrate is fixed to the outer member, and one end of the lead wire is electrically connected to the circuit component and the other end is Since it is electrically connected to the light source and is fixed to the periphery of the light source substrate, the center portion of the light source substrate is fixed to the outer member by the fixing member and the periphery is fixed to the outer member by the lead wire. The light source substrate is brought into close contact with the metal outer member, and the heat of the point light source is conducted to the peripheral portion of the outer member, and can be efficiently discharged from the peripheral portion to the outside.
また、請求項2の発明は、請求項1に記載の電球型ランプにおいて、前記光源は、前記光源基板の周辺部に固着されたリード線と前記固定部材と間に配設されているので、光源の熱により光源基板の周辺部が金属製外郭部材から浮き上がろうとしても、光源基板の周辺部を固定しているリード線がこれを抑制することができる。   Further, the invention according to claim 2 is the light bulb type lamp according to claim 1, wherein the light source is disposed between a lead wire fixed to a peripheral portion of the light source substrate and the fixing member. Even if the peripheral portion of the light source substrate is lifted from the metal outer member by the heat of the light source, the lead wire fixing the peripheral portion of the light source substrate can suppress this.
また、請求項3の発明は、請求項1又は2記載の電球型ランプにおいて、前記金属製の外郭部材には、前記光源を覆って透光性カバーを配設しているので、前記カバー内部の温度が光源の熱により上昇しようとしても、光源基板は、金属製外郭部材に密着し点状光源の熱を、外郭部材の周部に伝導させて、効率良くこの周部から外部に放出できる。   The invention of claim 3 is the light bulb type lamp according to claim 1 or 2, wherein the metal outer member is provided with a light-transmitting cover so as to cover the light source. Even if the temperature of the light source is going to rise due to the heat of the light source, the light source substrate adheres to the metal outer member and conducts the heat of the point light source to the peripheral part of the outer member, and can be efficiently discharged from this peripheral part to the outside. .
請求項1の発明によれば、光源基板の中心部は固定部材により、また、周辺部はリード線により外郭部材に固定されているので、光源基板は、金属製外郭部材に密着して点状光源の熱を外郭部材の周部に伝導させて、効率良くこの周部から外部に放出できる。   According to the first aspect of the present invention, since the central portion of the light source substrate is fixed to the outer member by the fixing member and the peripheral portion is fixed to the outer member by the lead wire, the light source substrate is in close contact with the metal outer member and is dotted. The heat of the light source can be conducted to the peripheral portion of the outer shell member, and can be efficiently emitted from the peripheral portion to the outside.
請求項2の発明によれば、リード線は、光源の熱により光源基板の周辺部が金属製外郭部材から浮き上がろうとすることを抑制することができる。   According to the second aspect of the present invention, the lead wire can suppress the peripheral portion of the light source substrate from floating from the metal outer member due to the heat of the light source.
請求項3の発明によれば、透光性カバー内部の温度が光源の熱により上昇しようとしても、光源基板は、金属製外郭部材に密着して点状光源の熱を外郭部材の周部に伝導させて、効率良くこの周部から外部に放出できる。   According to the invention of claim 3, even if the temperature inside the translucent cover is going to rise due to the heat of the light source, the light source substrate is in close contact with the metal outer member and the heat of the point light source is applied to the peripheral portion of the outer member. It can be conducted and efficiently discharged from the periphery to the outside.
図1〜図4を参照して本発明の一実施形態を説明する。図1及び図2中符号1は電球型ランプ(以下ランプと略称する。)を示している。このランプ1は、金属製の外郭部材2と、点状光源11と、透光性のカバー18と、点灯回路21と、絶縁部材26と、口金31とを具備している。   An embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 in FIGS. 1 and 2 denotes a light bulb type lamp (hereinafter abbreviated as a lamp). The lamp 1 includes a metal outer member 2, a point light source 11, a translucent cover 18, a lighting circuit 21, an insulating member 26, and a base 31.
外郭部材2は、例えばアルミニウムの一体成形品からなる。図2及び図3に示すように外郭部材2は、周部3と、これと一体の光源取付け部4とからなり、周部3の内側に凹部5が形成されている。光源取付け部4は周部3の軸方向一端を閉じた奥壁で形成されており、凹部5は周部3の軸方向他端に開口されている。   The outer member 2 is made of, for example, an integrally formed product of aluminum. As shown in FIGS. 2 and 3, the outer member 2 includes a peripheral portion 3 and a light source mounting portion 4 integrated with the peripheral portion 3, and a concave portion 5 is formed inside the peripheral portion 3. The light source mounting portion 4 is formed by a back wall with one axial end of the peripheral portion 3 closed, and the concave portion 5 is opened at the other axial end of the peripheral portion 3.
周部3の外周面3a(図2参照)は、放熱面として機能するものであって、光源取付け部4から凹部5の開口縁部2aに向けて次第に径が小さくなる円錐状のテーパ面で形成されている。開口縁部2aの内周面に環状をなす係止溝2bが設けられている。周部3と光源取付け部4とが一体に連続する部位に溝2cが形成されている。   The outer peripheral surface 3a (see FIG. 2) of the peripheral portion 3 functions as a heat radiating surface, and is a conical tapered surface whose diameter gradually decreases from the light source mounting portion 4 toward the opening edge 2a of the concave portion 5. Is formed. An annular locking groove 2b is provided on the inner peripheral surface of the opening edge 2a. A groove 2c is formed at a portion where the peripheral portion 3 and the light source mounting portion 4 are continuously integrated.
溝2cは、例えば光源取付け部4を囲んで環状に設けられていて、光源取付け部4の周部外面に開放されている。溝2cを設けたことによって、この溝2cがない構成に比較して外郭部材2の表面積(放熱面積)が増やされている。ランプ1に要求される外形的形状から放熱容積が限定されている外郭部材2において、その放熱面積を溝2cによって増やしたことにより、外郭部材2からの放熱量が増大される。したがって、光源取付け部4の温度、ひいては点状光源11の温度上昇を抑制する上で好ましい。この環状の溝2cは好ましい例としてカバー取付け溝を兼ねている。   For example, the groove 2 c is provided in an annular shape so as to surround the light source mounting portion 4, and is open to the outer peripheral surface of the light source mounting portion 4. By providing the groove 2c, the surface area (heat radiation area) of the outer member 2 is increased as compared with the configuration without the groove 2c. In the outer member 2 whose heat dissipation volume is limited due to the external shape required for the lamp 1, the heat dissipation area from the outer member 2 is increased by increasing the heat dissipation area by the groove 2c. Therefore, it is preferable to suppress the temperature rise of the light source mounting portion 4 and, in turn, the temperature of the point light source 11. The annular groove 2c also serves as a cover mounting groove as a preferred example.
図2及び図4に示すように光源取付け部4の中央部にねじ孔4aが開けられている。図4に示すように光源取付け部4には、ねじ孔4aを間に置いて一対の通孔4bが開けられている。これらねじ孔4a及び通孔4bの一端は、光源取付け部4の平坦な外面4cに開口され、この外面4cと平行な光源取付け部4の内面にねじ孔4a及び通孔4bの他端が開口されている。   As shown in FIGS. 2 and 4, a screw hole 4 a is formed at the center of the light source mounting portion 4. As shown in FIG. 4, the light source mounting portion 4 has a pair of through holes 4b with a screw hole 4a therebetween. One ends of these screw holes 4a and through holes 4b are opened in the flat outer surface 4c of the light source mounting portion 4, and the other ends of the screw holes 4a and through holes 4b are opened in the inner surface of the light source mounting portion 4 parallel to the outer surface 4c. Has been.
点状光源11をなすチップ状の発光素子にはLEDが用いられている。この点状光源11は、平板状の光源基板12に複数例えば4個(2個のみ図示する。)実装されていて、光源基板12を光源取付け部4の外面4cに固定することによって、光源取付け部4に熱伝導するように装着されている。   An LED is used as a chip-like light emitting element forming the point light source 11. A plurality of, for example, four (two are shown) of the point light sources 11 are mounted on the flat light source substrate 12, and the light source substrate 12 is fixed to the outer surface 4 c of the light source mounting portion 4, thereby mounting the light source. The unit 4 is mounted so as to conduct heat.
詳しくは、図4に示すように光源基板12は、絶縁板12aの一面に、銅等の金属箔からなるパターン層12bとともに、このパターン層12bを覆った絶縁レジスト層12cを設けるとともに、絶縁板12aの他面に、銅等の金属箔からなる熱拡散層12dとこれを覆った絶縁レジスト層12eを設けて形成されている。熱拡散層12dは、パターン層12bよりも厚く、各点状光源毎に対応して夫々形成されている。この光源基板12のパターン層12bに点状光源11が接続して面実装されている。光源基板12には、熱伝導性に優れる金属基板の両面に既述の各層を設けてなるものを用いることもできるが、コストの面からガラス粉末が混入されたエポキシ樹脂などの樹脂基板の両面に既述の各層を設けてなるものを用いることが好ましい。   Specifically, as shown in FIG. 4, the light source substrate 12 is provided with an insulating resist layer 12c covering the pattern layer 12b and a pattern layer 12b made of a metal foil such as copper on one surface of the insulating plate 12a. A heat diffusion layer 12d made of a metal foil such as copper and an insulating resist layer 12e covering the heat diffusion layer 12d are provided on the other surface of 12a. The thermal diffusion layer 12d is thicker than the pattern layer 12b, and is formed corresponding to each point light source. The point light source 11 is connected to the pattern layer 12 b of the light source substrate 12 and mounted on the surface. The light source substrate 12 may be one in which the above-described layers are provided on both surfaces of a metal substrate excellent in thermal conductivity. However, both surfaces of a resin substrate such as an epoxy resin mixed with glass powder from the viewpoint of cost. It is preferable to use a material provided with each layer described above.
光源基板12は、その熱拡散層12dを裏側にして、言い換えれば熱拡散層12dが光源取付け部4の外面4cに向くようにしてこの外面4cに重ねられている。この状態で、光源基板12の中心部を貫通してねじ孔4aに、固定部材としてのねじ13を光源取付け部4にねじ込むことにより、光源取付け部4の外面4cに光源基板12が密接して固定されている。これにより、点状光源11が発する熱を、絶縁板12aを介して良熱伝導性の熱拡散層12dに伝えて、この熱拡散層12dで拡散させてから絶縁レジスト層12eを介して光源取付け部4に直接的に伝導させることができる。   The light source substrate 12 is overlaid on the outer surface 4c with the heat diffusion layer 12d on the back side, in other words, the heat diffusion layer 12d faces the outer surface 4c of the light source mounting portion 4. In this state, the light source substrate 12 is brought into close contact with the outer surface 4c of the light source mounting portion 4 by screwing the screw 13 as a fixing member into the light source mounting portion 4 through the central portion of the light source substrate 12 into the screw hole 4a. It is fixed. As a result, the heat generated by the point light source 11 is transmitted to the heat diffusion layer 12d having good thermal conductivity via the insulating plate 12a, diffused by the heat diffusion layer 12d, and then attached to the light source via the insulating resist layer 12e. The part 4 can be directly conducted.
こうした光源基板12から光源取付け部4への熱伝導経路での熱抵抗をより小さくするために、光源基板12と光源取付け部4との間に、シリコンやグリースなどの伝熱要素を充填するなどして良熱伝導性の伝熱層を設けてもよい。   In order to further reduce the thermal resistance in the heat conduction path from the light source substrate 12 to the light source mounting portion 4, a heat transfer element such as silicon or grease is filled between the light source substrate 12 and the light source mounting portion 4. Then, a heat transfer layer having good heat conductivity may be provided.
透光性のカバー18は、合成樹脂製などにより例えば半球状に形成されたグロープからなる。カバー18はその開口縁部18aを外郭部材2の溝2cに嵌めることによって外郭部材2に装着されている。したがって、カバー18は、光源取付け部4を覆い隠しており、点状光源11はカバー18の内面に対向している。   The translucent cover 18 is made of, for example, a hemisphere made of synthetic resin. The cover 18 is attached to the outer member 2 by fitting the opening edge portion 18 a into the groove 2 c of the outer member 2. Therefore, the cover 18 covers the light source mounting portion 4, and the point light source 11 faces the inner surface of the cover 18.
点状光源11を点灯させるための点灯回路21は、図2に示すように回路基板22に各種の回路部品23を取付けて、ユニット化されている。回路基板22は円形状をなしており、回路部品23はコンデンサ(図示しない)を含んでいる。回路部品23の多くは、そのリード端子を回路基板22に貫通させて回路基板22の一面側に実装されていて、前記リード端子は回路基板22の他面に設けられている図示しない回路パターンに半田付けされている。   The lighting circuit 21 for lighting the point light source 11 is unitized by attaching various circuit components 23 to a circuit board 22 as shown in FIG. The circuit board 22 has a circular shape, and the circuit component 23 includes a capacitor (not shown). Many of the circuit components 23 are mounted on one side of the circuit board 22 with their lead terminals penetrating the circuit board 22, and the lead terminals are formed on a circuit pattern (not shown) provided on the other side of the circuit board 22. Soldered.
点灯回路21は凹部5に収容されている。この点灯回路21は点状光源11に電気的に接続するためのリード線としての2本の絶縁被覆電線24(図4参照。)と、後述する口金31に接続するための絶縁被覆電線(図示しない)とを有している。絶縁被覆電線24は通孔4bを通って光源基板12のパターン層12bに半田付けにより接続されている。したがって、これらの絶縁被覆電線24によってまた、光源基板12周辺部は外郭部材3に固定されているので、光源基板12は、金属製外郭部材3に密着し、点状光源11の熱を外郭部材3の周部に伝導させて、効率良くこの周部から外部に放出できる。また、前記光源11は、前記光源基板12の周辺部に固着された絶縁被覆電線24と前記ねじ13と間に配設されているので、光源11の熱により光源基板12の周辺部が金属製外郭部材3から浮き上がろうとしても、光源基板12の周辺部を固定しているが絶縁被覆電線24がこれを抑制することができる。   The lighting circuit 21 is accommodated in the recess 5. The lighting circuit 21 has two insulated wires 24 (see FIG. 4) as lead wires for electrical connection to the point light source 11, and an insulated wire (not shown) for connection to a base 31 described later. Not). The insulating covered electric wire 24 is connected to the pattern layer 12b of the light source substrate 12 by soldering through the through hole 4b. Therefore, since the peripheral portion of the light source substrate 12 is also fixed to the outer shell member 3 by these insulated coated electric wires 24, the light source substrate 12 is in close contact with the metal outer shell member 3 and the heat of the point light source 11 is transferred to the outer shell member. 3 can be conducted to the periphery of the outer periphery and efficiently discharged from the periphery. Further, since the light source 11 is disposed between the insulation-coated electric wire 24 fixed to the peripheral portion of the light source substrate 12 and the screw 13, the peripheral portion of the light source substrate 12 is made of metal by the heat of the light source 11. Even if it tries to float from the outer member 3, the peripheral portion of the light source substrate 12 is fixed, but the insulation-coated electric wire 24 can suppress this.
絶縁部材26は合成樹脂例えばポリブチレンテレフタレートの成形体である。この絶縁部材26は、後述する口金31に向けて開口するとともにこの開口側ほど大径となる円筒状部26b、及びこの円筒状部26bの一端に連続して前記開口に対向する閉鎖壁部26aを有してカップ状をなしている。図2に示すように絶縁部材26の軸方向の長さAは、光源取付け部4の内面(凹部5の奥壁面)から係止溝2bに至る外郭部材2の軸方向に沿った長さBより短い。   The insulating member 26 is a molded body of a synthetic resin such as polybutylene terephthalate. The insulating member 26 opens toward a base 31 to be described later, and has a cylindrical portion 26b whose diameter increases toward the opening side, and a closed wall portion 26a that is continuous with one end of the cylindrical portion 26b and faces the opening. And has a cup shape. As shown in FIG. 2, the length A in the axial direction of the insulating member 26 is a length B along the axial direction of the outer member 2 extending from the inner surface of the light source mounting portion 4 (the inner wall surface of the recess 5) to the locking groove 2b. Shorter.
絶縁部材26は、その外周面を凹部5の内周面に接触させるとともに、閉鎖壁部26aの外面を光源取付け部4の内面に接触させて設けられている。この絶縁部材26の内側に点灯回路21が収容されている。この場合、点灯回路21は、回路基板22の前記リード端子が突出された面を閉鎖壁部26aに対向させるとともに、回路部品23が実装された面を絶縁部材26の開口に向けた横置き姿勢で絶縁部材26に収容されている。したがって、絶縁部材26は凹部5の内面と点灯回路21とを仕切ってこれらの間に設けられている。なお、絶縁部材26の閉鎖壁部26aには、図4に示すように絶縁被覆電線24を通すための一対の電線通孔26cが開けられている。   The insulating member 26 is provided with its outer peripheral surface in contact with the inner peripheral surface of the recess 5 and with the outer surface of the closed wall portion 26 a in contact with the inner surface of the light source mounting portion 4. The lighting circuit 21 is accommodated inside the insulating member 26. In this case, the lighting circuit 21 faces the closed wall portion 26a so that the surface of the circuit board 22 from which the lead terminal protrudes, and the surface on which the circuit component 23 is mounted faces the opening of the insulating member 26. In the insulating member 26. Therefore, the insulating member 26 divides the inner surface of the recess 5 and the lighting circuit 21 and is provided between them. As shown in FIG. 4, a pair of wire through holes 26 c for allowing the insulation-coated wires 24 to pass through are opened in the closed wall portion 26 a of the insulating member 26.
点灯回路21に電源を供給するために外郭部材2の開口縁部2a側に配設された口金31は、口金要素32と、この口金要素32に固定され連結部材33とを有している。図示しないランプソケットに着脱自在に取付けられる口金要素32は、その周部に例えば螺旋溝を有していて、図示しないランプソケットに着脱自在にねじ込まれる部分をなしている。連結部材33は、合成樹脂例えばポリブチレンテレフタレートなどの絶縁材製であり、凹部5の開口縁部2aに接続されている。   A base 31 disposed on the opening edge 2 a side of the outer member 2 for supplying power to the lighting circuit 21 includes a base element 32 and a connection member 33 fixed to the base element 32. The base element 32 that is detachably attached to a lamp socket (not shown) has, for example, a spiral groove on the periphery thereof, and forms a part that is detachably screwed into the lamp socket (not shown). The connecting member 33 is made of an insulating material such as synthetic resin such as polybutylene terephthalate, and is connected to the opening edge 2 a of the recess 5.
この接続のために、連結部材33の先端部外周に環状の係止凸部33a(図3参照)が形成されている。この係止凸部33aを開口縁部2aの係止溝2bに嵌入させ係止させることによって、図1、図2に示すように口金31と外郭部材2とが連結されている。この連結を担った連結部材33は、口金要素32の金属部と金属製の外郭部材2との間に介在して、これら両者間を電気的に絶縁するとともに、熱的にも絶縁している。   For this connection, an annular locking projection 33a (see FIG. 3) is formed on the outer periphery of the distal end portion of the coupling member 33. By fitting the locking projection 33a into the locking groove 2b of the opening edge 2a and locking it, the base 31 and the outer member 2 are connected as shown in FIGS. The connection member 33 responsible for this connection is interposed between the metal portion of the base element 32 and the metal outer member 2 to electrically insulate them from each other and also to thermally insulate them. .
この連結状態で周部3の外周面3aと連結部材33の外周面とは面一に連続される。また、凹部5への連結部材33の先端部の挿入深さは、連結部材33の段部33bが周部3の端面に当たることにより規制されている。寸法のばらつきによる係止溝2bへの係止凸部33aの係合不良を生じないようにするために、前記規制により係止凸部33aが絶縁部材26の開口縁に当たらないようになっている(図2参照)。   In this connected state, the outer peripheral surface 3a of the peripheral portion 3 and the outer peripheral surface of the connecting member 33 are flush with each other. Further, the insertion depth of the distal end portion of the connecting member 33 into the recess 5 is regulated by the stepped portion 33 b of the connecting member 33 hitting the end surface of the peripheral portion 3. In order to prevent a failure in engagement of the locking projection 33a with the locking groove 2b due to dimensional variations, the locking projection 33a does not hit the opening edge of the insulating member 26 due to the restriction. (See FIG. 2).
前記構成のランプ1は、外郭部材2に設けた凹部5に点灯回路21を収容したので、点灯回路21を配置するためのスペースを外郭部材2に対してその軸方向に並べて確保する必要がない。これにより、ランプ1の軸方向長さが短くなり、コンパクトなランプ1とすることができる。   Since the lamp 1 having the above configuration houses the lighting circuit 21 in the recess 5 provided in the outer member 2, it is not necessary to secure a space for arranging the lighting circuit 21 in the axial direction with respect to the outer member 2. . Thereby, the axial direction length of the lamp | ramp 1 becomes short, and it can be set as the compact lamp | ramp 1. FIG.
こうしたランプ1のコンパクト化において、外郭部材2と点灯回路21との間に絶縁部材26を介在させたので、後述のように放熱を担う外郭部材2が金属製であるにも拘わらず、その凹部5に内蔵された点灯回路21を、外郭部材2に対して電気的に絶縁できる。   In making the lamp 1 compact, the insulating member 26 is interposed between the outer member 2 and the lighting circuit 21. Therefore, the outer member 2 that is responsible for heat dissipation is made of metal, as described later. The lighting circuit 21 built in 5 can be electrically insulated from the outer member 2.
このランプ1の点灯時、点状光源11は熱を発生する。この熱は、カバー18内での対流による冷却などに加えて、以下のように冷却される。すなわち、点状光源11の熱は、金属製の外郭部材2の光源取付け部4に直接的に伝導されて、ここから外郭部材2の周部3に伝導して、この周部3の外周面3aからランプ1の外部に放出される。   When the lamp 1 is turned on, the point light source 11 generates heat. In addition to cooling by convection in the cover 18, this heat is cooled as follows. That is, the heat of the point light source 11 is directly conducted to the light source mounting portion 4 of the metal outer member 2 and from here to the peripheral portion 3 of the outer member 2, and the outer peripheral surface of the peripheral portion 3. 3a is discharged to the outside of the lamp 1.
このランプ1が備えた外郭部材2の周部3と光源取付け部4とは一体に成形されていて接合部がないので、放熱経路をなす外郭部材2での熱抵抗が小さい。このため、点状光源11の熱を受ける光源取付け部4から周部3に至る熱伝導が良好で、以上の放熱による点状光源11に対する冷却性能が優れている。したがって、点状光源11の温度が異常に上昇することが抑制されて、点状光源11の発光効率の低下と寿命の低下とを抑制できる。   Since the peripheral portion 3 and the light source mounting portion 4 of the outer member 2 included in the lamp 1 are integrally formed and have no joint portion, the thermal resistance of the outer member 2 forming the heat radiation path is small. For this reason, the heat conduction from the light source mounting portion 4 receiving the heat of the point light source 11 to the peripheral portion 3 is good, and the cooling performance for the point light source 11 by the above heat radiation is excellent. Therefore, the temperature of the point light source 11 is prevented from rising abnormally, and the light emission efficiency and the life of the point light source 11 can be suppressed from decreasing.
しかも、点状光源11の熱は、これが実装された光源基板12の熱拡散層12dを通ることによって、広範囲な面積で直接的に光源取付け部4に授受されるので、点状光源11から外郭部材2への熱伝導が良好である。この点においても点状光源11に対する冷却性能を向上できる。   Moreover, since the heat of the point light source 11 passes through the heat diffusion layer 12d of the light source substrate 12 on which the point light source 11 is mounted, it is directly transferred to the light source mounting portion 4 over a wide area. The heat conduction to the member 2 is good. Also in this respect, the cooling performance for the point light source 11 can be improved.
また、放熱経路をなす外郭部材2に対して点灯回路21を電気的に絶縁したカップ状の絶縁部材26は、外郭部材2よりも低い熱伝導性の絶縁材料で作られているので、この絶縁部材26によって、外郭部材2に内蔵された点灯回路21に、外郭部材2の熱が伝わることを抑制できる。こうして凹部5内の点灯回路21を熱的に保護できるので、点灯回路21の動作信頼性及び寿命の低下を抑制できる。   In addition, the cup-shaped insulating member 26 that electrically insulates the lighting circuit 21 from the outer member 2 that forms a heat dissipation path is made of a heat conductive insulating material lower than that of the outer member 2. The member 26 can suppress the heat of the outer member 2 from being transmitted to the lighting circuit 21 built in the outer member 2. Thus, since the lighting circuit 21 in the recess 5 can be thermally protected, it is possible to suppress a reduction in the operational reliability and life of the lighting circuit 21.
また、点灯回路21は、一端が光源取付け部4で閉じられた外郭部材2と、この外郭部材2の他端を閉じるように開口縁部2aに接続された口金31とで仕切られた空間に収容されていて、この空間にはランプ1の外部空気が流通することがない。このため、トラッキング現象の原因となる空気中の埃が点灯回路21に付着することもない。   Further, the lighting circuit 21 is in a space partitioned by an outer member 2 whose one end is closed by the light source mounting portion 4 and a base 31 connected to the opening edge 2a so as to close the other end of the outer member 2. In this space, the outside air of the lamp 1 does not flow. For this reason, dust in the air that causes a tracking phenomenon does not adhere to the lighting circuit 21.
本発明の一実施形態に係る電球型ランプを示す斜視図。1 is a perspective view showing a light bulb type lamp according to an embodiment of the present invention. 図1の電球型ランプを示す断面図。Sectional drawing which shows the light bulb type lamp of FIG. 図1の電球型ランプを分解して示す断面図。FIG. 2 is an exploded cross-sectional view of the light bulb type lamp of FIG. 1. 図2中F4−F4線に沿って示す断面図。Sectional drawing shown along the F4-F4 line | wire in FIG.
符号の説明Explanation of symbols
1…電球型ランプ、2…外郭部材、2a…外郭部材の開口縁部、2b…係止溝、3…外郭部材の周部、3a…周部の外周面(放熱面)、4…外郭部材の光源取付け部、4a…ねじ孔、4c…光源取付け部の外面、5…外郭部材の凹部、5a…ストッパ部、11…点状光源、13…ねじ、18…透光性カバー、21…点灯回路、22…回路基板、23…回路部品、24…絶縁被覆電線、26…絶縁部材、26a…閉鎖壁部、26b…円筒状部、31…口金、32…口金要素、33…連結部材、33a…係止凸部。   DESCRIPTION OF SYMBOLS 1 ... Light bulb type | mold lamp, 2 ... Outer member, 2a ... Opening edge part of outer member, 2b ... Locking groove, 3 ... Peripheral part of outer member, 3a ... Outer peripheral surface (heat dissipation surface) of peripheral part, 4 ... Outer member 4a ... external surface of the light source mounting portion, 5 ... concave portion of the outer shell member, 5a ... stopper portion, 11 ... point light source, 13 ... screw, 18 ... translucent cover, 21 ... lighting Circuit, 22 ... Circuit board, 23 ... Circuit component, 24 ... Insulated coated wire, 26 ... Insulating member, 26a ... Closed wall part, 26b ... Cylindrical part, 31 ... Base, 32 ... Base element, 33 ... Connecting member, 33a ... locking convex part.

Claims (3)

  1. 外部に露出する周部、この周部に一体に形成された光源取付け部および前記周部の内側に形成された凹部を有する金属製の外郭部材と;
    前記凹部の開口縁部側に配設された口金と;
    点状光源を実装し、前記光源取付け部に熱伝導するようにこの光源取付け部の外面に装着された光源基板と;
    光源基板のほぼ中心部に設けられ、前記光源基板を前記外郭部材に固着させる固定部材と;
    回路部品と、一端が回路部品に電気的に接続され他端が前記光源に電気的に接続されるともに前記光源基板の周辺部に固着されるリード線と、リード線および回路部品を取付けてなる回路基板とを有し、前記凹部に収容される点灯回路と;
    を具備することを特徴とする電球型ランプ。
    A metal outer member having a peripheral portion exposed to the outside, a light source mounting portion formed integrally with the peripheral portion, and a concave portion formed inside the peripheral portion;
    A base disposed on the opening edge side of the recess;
    A light source substrate mounted with a point light source and mounted on the outer surface of the light source mounting portion so as to conduct heat to the light source mounting portion;
    A fixing member provided at a substantially central portion of the light source substrate and fixing the light source substrate to the outer member;
    A circuit component, a lead wire having one end electrically connected to the circuit component and the other end electrically connected to the light source and fixed to the periphery of the light source substrate, and the lead wire and the circuit component are attached. A lighting circuit having a circuit board and received in the recess;
    A light bulb type lamp characterized by comprising:
  2. 前記光源は、前記光源基板の周辺部に固着されたリード線と前記固定部材との間に配設されていることを特徴とする請求項1に記載の電球型ランプ。   The light bulb lamp according to claim 1, wherein the light source is disposed between a lead wire fixed to a peripheral portion of the light source substrate and the fixing member.
  3. 前記金属製の外郭部材には、前記光源を覆って透光性カバーを配設していることを特徴とする請求項1又は2記載の電球型ランプ。   3. The light bulb-type lamp according to claim 1, wherein a translucent cover is disposed on the metal outer member so as to cover the light source.
JP2005269017A 2005-04-08 2005-09-15 Bulb-type lamp Expired - Fee Related JP4849305B2 (en)

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