JP4858330B2 - Downlight - Google Patents

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JP4858330B2
JP4858330B2 JP2007167222A JP2007167222A JP4858330B2 JP 4858330 B2 JP4858330 B2 JP 4858330B2 JP 2007167222 A JP2007167222 A JP 2007167222A JP 2007167222 A JP2007167222 A JP 2007167222A JP 4858330 B2 JP4858330 B2 JP 4858330B2
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support
translucent cover
cover body
downlight
support portion
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JP2009009709A (en
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賢吾 庄司
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Noritz Corp
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Description

本発明は、ダウンライト、特に、浴室用ダウンライトに関する。より詳細には、本発明は、ダウンライト本体の下面に取り付ける透光カバー体において、ダウンライト本体に取り付けるための取付体の支持部を複数形成し、複数の支持部が温度上昇によって溶ける速度を異ならせ、異常加熱時に透光カバー体の少なくとも1つの支持部で支持することにより、ダウンライト本体から透光カバー体が脱落することなく開き、異常な温度上昇を防止することのできる透光カバー体の取付構造に関する。   The present invention relates to a downlight, and more particularly to a bathroom downlight. More specifically, the present invention provides a translucent cover body to be attached to the lower surface of the downlight body, wherein a plurality of support portions for the attachment body for attachment to the downlight body are formed, and the speed at which the plurality of support portions melts due to a temperature rise. A translucent cover that can be opened without falling off from the downlight main body and prevented from abnormal temperature rise by being supported by at least one support portion of the translucent cover body during abnormal heating The present invention relates to a body mounting structure.

エアコン等の冷暖房効果を上げるために、天井裏に断熱材を敷設することがあるが、そのような場合、天井裏に位置するダウンライトの上部を断熱材でカバーしてしまうおそれがある。   In order to increase the cooling / heating effect of an air conditioner or the like, a heat insulating material may be laid on the back of the ceiling. In such a case, there is a possibility that the upper part of the downlight located on the back of the ceiling is covered with the heat insulating material.

ところで、ダウンライトは、室内側(照明側)の開口に樹脂製の透光カバー体を取り付けて密閉構造にする場合がある。例えば、ダウンライトを、システムバスのように浴室用に使用したり、洗面所用等に使用したりする場合は、ダウンライトの電球、電気的接触部およびスイッチ部等を、室内の湿気から守るために、透光カバー体を取り付ける必要がある。   By the way, a downlight may have a sealed structure by attaching a resin transparent cover body to an opening on the indoor side (illumination side). For example, when the downlight is used for a bathroom such as a system bath, or for a bathroom, etc., to protect the light bulb, electrical contact part and switch part of the downlight from indoor moisture. In addition, it is necessary to attach a translucent cover body.

ダウンライトの天井裏に位置する上部を断熱材でカバーし、しかも照明側の開口に樹脂製の透光カバー体を取り付けて密閉構造にすると、電球から発生する照明熱によって、ダウンライトが異常加熱して火災につながってしまうという問題がある。このようなダウンライトの異常加熱を防ぎ、火災等の事故を防ぐ手段として、ダウンライトの安全構造が必要である。   If the upper part of the downlight's ceiling is covered with a heat insulating material and a resin transparent cover is attached to the opening on the lighting side to create a sealed structure, the downlight will be heated abnormally by the illumination heat generated from the bulb. Then there is a problem that it leads to a fire. As a means for preventing such abnormal heating of the downlight and preventing an accident such as a fire, a safety structure for the downlight is required.

従来、ダウンライトにおいて、断熱材をカバーして不測の事態が生じても、過熱による発煙を回避するために、温度ヒューズを設け、ヒューズの遮断により通電を遮断するものが知られている(特許文献1参照)。また、ダウンライトにおいて、断熱材で覆われても、器具外殻温度が異常に上昇しないよう外面を断熱材で形成したものが知られている(特許文献2参照)。   Conventionally, in a downlight, even if an unexpected situation occurs by covering a heat insulating material, a thermal fuse is provided in order to avoid smoke generation due to overheating, and the current is cut off by cutting off the fuse (patent) Reference 1). Further, a downlight is known in which an outer surface is formed of a heat insulating material so that the outer shell temperature does not rise abnormally even when covered with the heat insulating material (see Patent Document 2).

そして、ダウンライトにおいて、反射板と器具本体内側壁との空間内に、金属製の熱伝導板を設け、ランプ側の面に塗装を施したものが知られている(特許文献3参照)。さらに、ダウンライトにおいて、本体側壁に複数の放熱孔を設け、放熱孔を閉塞する可溶性薄膜を設けたものが知られている(特許文献4参照)。   In the downlight, a metal heat conduction plate is provided in the space between the reflection plate and the inner wall of the appliance body, and the lamp side surface is coated (see Patent Document 3). Further, a downlight is known in which a plurality of heat radiating holes are provided on a side wall of a main body and a soluble thin film that closes the heat radiating holes is provided (see Patent Document 4).

登録実用新案3116839号公報Registered Utility Model No. 3116839 実開昭60−136418公報Japanese Utility Model Publication No. 60-136418 実開昭62−88315号公報Japanese Utility Model Publication No. 62-88315 実開昭60−76811号公報Japanese Utility Model Publication No. 60-76811

上記のような従来知られているダウンライトの照明熱による異常な加熱や温度上昇を防ぐ手段は、その構成は必ずしも簡単ではない。そこで、本発明者は、浴室天井用のダウンライトの異常加熱を防ぐ手段を鋭意開発した結果、ダウンライトの本体の照明側開口に取り付けられた透光カバー体の温度が異常に上昇すると、この透光カバー体を取り付けている部位が溶けて透光カバー体が外れることで、ダウンライトの温度上昇を抑制するという新規な構成を想到した。   The conventionally known means for preventing abnormal heating and temperature rise due to illumination heat of the downlight is not necessarily simple in configuration. Therefore, as a result of earnestly developing means for preventing abnormal heating of the downlight for the bathroom ceiling, the present inventor, when the temperature of the translucent cover body attached to the illumination side opening of the downlight main body rises abnormally, A new configuration has been conceived in which the temperature increase of the downlight is suppressed by melting the portion where the translucent cover body is attached and removing the translucent cover body.

この構成において、ダウンライトが異常加熱して透光カバー体を複数の部位で取り付け、これら複数の部位が溶けて透光カバー体が外れると、透光カバー体が天井から落下し、落下に伴う危害が生じる。   In this configuration, when the downlight is abnormally heated and the translucent cover body is attached at a plurality of parts, and the plurality of parts melt and the translucent cover body is detached, the translucent cover body falls from the ceiling and is accompanied by the fall. Hazards occur.

そこで、本発明は、ダウンライトが異常加熱し、透光カバー体を取り付けている部位が溶けて透光カバー体が外れるという構成であり、しかも投光カバーがダウンライト本体から完全に外れて落下するようなことが起こらない構造の投光カバーの取り付け構造を実現することを課題とする。   Therefore, the present invention is a configuration in which the downlight is abnormally heated, the portion where the translucent cover body is attached melts, and the translucent cover body is detached, and the floodlight cover is completely detached from the downlight main body and dropped. It is an object of the present invention to realize a light emitting cover mounting structure that does not cause such a situation.

本発明は上記課題を解決するために、投光するランプと、ランプを内包し、下端面が開放された筒状本体と、筒状本体の下端面を覆う透光カバー体と、透光カバー体を筒状本体に取り付けるための複数の取付体とを備えたダウンライトであって、透光カバー体は複数の取付体を支持する複数の支持部を備え、取付体は透光カバー体の支持部に固定される支持具を各々備えており、透光カバー体の複数の支持部の温度上昇による溶ける度合いが互いに異なっており、異常加熱時に、複数の支持部のうち少なくとも1つ支持部で、透光カバー体が取付体から外れ、少なくとも1つの支持部で、透光カバー体が支持されることにより、筒状本体およびその内部の温度上昇を抑制することを特徴とするダウンライトを提供する。   In order to solve the above-described problems, the present invention provides a lamp for projecting light, a cylindrical main body containing the lamp and having a lower end surface opened, a translucent cover body covering the lower end surface of the cylindrical main body, and a translucent cover A downlight including a plurality of attachment bodies for attaching the body to the cylindrical main body, wherein the translucent cover body includes a plurality of support portions that support the plurality of attachment bodies, and the attachment body is formed of the translucent cover body. Each of the support members is provided with a support fixed to the support part, and the degree of melting of the plurality of support parts of the translucent cover body is different from each other due to a temperature rise. At the time of abnormal heating, at least one of the support parts A downlight characterized in that the translucent cover body is detached from the mounting body, and the translucent cover body is supported by at least one support portion, thereby suppressing the temperature rise in the cylindrical main body and the inside thereof. provide.

透光カバー体の支持部は、取付体の支持具の熱を受けるように構成されており、複数の取付体の支持具の少なくとも1つの支持具に塗装が施されている、または複数の取付体の支持具が温度上昇による溶ける度合いの異なる材料で形成されていることが好ましい。   The support portion of the translucent cover body is configured to receive heat from the support of the mounting body, and at least one support of the support of the plurality of mounting bodies is coated, or the plurality of mountings It is preferable that the body support is formed of materials having different degrees of melting due to temperature rise.

透光カバー体の複数の支持部の材質、形状、もしくは厚みが互いに異なっていることが好ましい。   It is preferable that the materials, shapes, or thicknesses of the plurality of support portions of the translucent cover body are different from each other.

透光カバー体の複数の支持部のうち、少なくとも1つの支持部に他の部材が埋設または固定されていることが好ましい。   It is preferable that another member is embedded or fixed to at least one of the plurality of support portions of the translucent cover body.

透光カバー体の複数の支持部が孔で構成され、複数の孔の位置もしくは大きさが互いに異なっていることが好ましい。   It is preferable that the plurality of support portions of the translucent cover body are configured by holes, and the positions or sizes of the plurality of holes are different from each other.

本発明によれば、ダウンライトが異常加熱しても、透光カバー体を取り付けている複数の取付部のうちの少なくとも1箇所の取付部が溶けることで透光カバー体が外れ、放熱が可能となり、それ以上、昇温しないので、異常な温度上昇を防止でき、しかも、透光カバー体がダウンライト本体から完全に外れて落下することがないので、ダウンライトの落下による危害は防止できる。   According to the present invention, even when the downlight is abnormally heated, the translucent cover body is detached and heat can be dissipated by melting at least one of the multiple mounting sections to which the translucent cover body is attached. Since the temperature does not rise any further, an abnormal temperature rise can be prevented, and further, the translucent cover body does not fall off from the downlight body completely, so that it is possible to prevent harm due to the fall of the downlight.

本発明に係るダウンライトを実施するための最良の形態を実施例に基づき図面を参照して、以下説明する。本発明に係るダウンライトは、ダウンライト本体の下面に取り付ける透光カバー体が異常加熱した際に、透光カバー体をダウンライト本体に取り付けている支持部が溶けて透光カバー体が外れて開く構成である。   The best mode for carrying out the downlight according to the present invention will be described below with reference to the drawings based on the embodiments. In the downlight according to the present invention, when the translucent cover body attached to the lower surface of the downlight main body is abnormally heated, the support portion that attaches the translucent cover body to the downlight main body melts and the translucent cover body is detached. It is an open configuration.

そして、本発明に係るダウンライトは、ダウンライト本体に取り付けるための取付体の支持部を複数形成し、複数の支持部が温度上昇によって溶ける速度を異ならせ、異常加熱時に透光カバー体の少なくとも1つの支持部で支持することにより、ダウンライト本体から透光カバー体が脱落することなく開き、異常な温度上昇を防止することのできる透光カバー体の取付構造を特徴とする。   And the downlight according to the present invention forms a plurality of support portions of the attachment body to be attached to the downlight body, changes the speed at which the plurality of support portions melt due to temperature rise, and at least the light-transmitting cover body during abnormal heating By being supported by one support portion, the translucent cover body can be opened without dropping from the downlight body, and an abnormal temperature rise can be prevented.

図1〜図5において、本発明に係るダウンライトの実施例1を説明する。ダウンライト1は、図1、2に示すように、筒状本体2と、筒状本体2の下端面を覆う透光カバー体3と、透光カバー体3を筒状本体2に取り付けるための2つの取付体4とを備えている。筒状本体2には、投光用のランプ5が内包されており、このランプ5は、筒状本体2の上部に設けられた電球ソケット6に取り付けられるように構成されている。   A first embodiment of a downlight according to the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the downlight 1 includes a cylindrical main body 2, a translucent cover body 3 that covers the lower end surface of the cylindrical main body 2, and a translucent cover body 3 for attaching the translucent cover body 3 to the cylindrical main body 2. Two attachment bodies 4 are provided. The tubular main body 2 includes a lamp 5 for light projection, and the lamp 5 is configured to be attached to a light bulb socket 6 provided on the upper portion of the tubular main body 2.

筒状本体2は、その下端面が開放されて下端開口7が形成されている。また、筒状本体2の側壁8における互いに対向する2箇所に、それぞれ取付孔9が形成されている。筒状本体2は、樹脂(例.ポリカーボネート等)、或いは金属(鉄、アルミ等)で形成されている。下端開口7の外周囲にはパッキン10が装着されている。   The lower end surface of the cylindrical main body 2 is opened to form a lower end opening 7. In addition, attachment holes 9 are formed at two positions on the side wall 8 of the cylindrical main body 2 facing each other. The cylindrical main body 2 is formed of a resin (eg, polycarbonate) or a metal (iron, aluminum, etc.). A packing 10 is attached to the outer periphery of the lower end opening 7.

透光カバー体3は、図3(a)に示すように、筒部11と、この筒部11の下端の外周に張り出すフランジ部12とから成る透光カバー本体13、および筒部11の下端開口7に装着され、光散乱面を有する透光板14とから成る。筒部11は、図2(b)に示すように、筒状本体2の下端開口7内に嵌合するように構成されている。   As shown in FIG. 3A, the translucent cover body 3 includes a translucent cover main body 13 including a cylindrical portion 11 and a flange portion 12 projecting to the outer periphery of the lower end of the cylindrical portion 11, and the cylindrical portion 11. The light transmitting plate 14 is attached to the lower end opening 7 and has a light scattering surface. The cylindrical part 11 is comprised so that it may fit in the lower end opening 7 of the cylindrical main body 2, as shown in FIG.2 (b).

透光カバー体3の筒部11における互いに対向する2箇所に、第1の支持部15および第2の支持部16が形成されている。これらの第1の支持部15および第2の支持部16とは、それぞれ筒部11に矩形の第1の支持孔18および第2の支持孔19が形成された構成である(図3(a)参照)。   A first support portion 15 and a second support portion 16 are formed at two positions facing each other in the cylindrical portion 11 of the translucent cover body 3. These 1st support parts 15 and 2nd support parts 16 are the structures by which the rectangular 1st support hole 18 and 2nd support hole 19 were formed in the cylinder part 11, respectively (FIG. 3 (a) )reference).

透光カバー本体13は、本実施例1では樹脂(例.ポリカーボネート等)で形成され、透光板14は、樹脂(例.アクリル等)又はガラスで形成されている。透光板14は透明でもよいが、その表面に光散乱面を形成されているものでもよい。図3(b)に示すように、透光カバー体3の筒部11の支持部15、16に、取付体4が取り付けられている。   In the first embodiment, the translucent cover main body 13 is made of resin (eg, polycarbonate), and the translucent plate 14 is made of resin (eg, acrylic) or glass. The translucent plate 14 may be transparent, but may have a light scattering surface formed on the surface thereof. As shown in FIG. 3B, the attachment body 4 is attached to the support portions 15 and 16 of the cylindrical portion 11 of the translucent cover body 3.

取付体4は、図4(a)〜(d)に示すように、捩りばね20と、捩りばね20に取り付けられた支持具21とを備えている。捩りばね20は、リング状の捩り部22と、この捩り部22によってV字状に拡開するように付勢された一対のアーム部23とから構成され、支持具21は捩り部22に嵌めるようにして取り付けられる。   As shown in FIGS. 4A to 4D, the attachment body 4 includes a torsion spring 20 and a support 21 attached to the torsion spring 20. The torsion spring 20 includes a ring-shaped torsion part 22 and a pair of arm parts 23 urged so as to expand in a V shape by the torsion part 22, and the support 21 is fitted to the torsion part 22. It is attached in this way.

支持具21は、この実施例では金属板が内側部24と外側部25に折り返されて形成されている。内側部24の下端には外側に向けて屈曲した係合部26が形成されており、外側部25には係合部26に対応して係合孔27が形成されているとともに、内側にクランク状の折曲げ片28が形成されている(図4(d)参照)。   In this embodiment, the support 21 is formed by folding a metal plate into an inner part 24 and an outer part 25. An engagement portion 26 that is bent outward is formed at the lower end of the inner portion 24, and an engagement hole 27 is formed in the outer portion 25 corresponding to the engagement portion 26, while A bent piece 28 is formed (see FIG. 4D).

支持具21は、透光カバー体3の筒部11をその上縁側から弾力的に挟持するように筒部11に装着される。そして、係合部26は筒部11の第1の支持孔18(又は第2の支持孔19)および係合孔27に係入し、さらに折曲げ片28も係合孔27から筒部11の内側に係入するように構成されている。これによって、取付体4は、図4(a)〜(d)に示すように、投光カバー体3に取り付けられている。   The support tool 21 is attached to the cylindrical portion 11 so as to elastically hold the cylindrical portion 11 of the translucent cover body 3 from the upper edge side. The engaging portion 26 is engaged with the first supporting hole 18 (or the second supporting hole 19) and the engaging hole 27 of the cylindrical portion 11, and the bent piece 28 is also connected to the cylindrical portion 11 from the engaging hole 27. It is comprised so that it may engage inside. Accordingly, the attachment body 4 is attached to the light projecting cover body 3 as shown in FIGS.

透光カバー体3を、ダウンライト1の筒状本体2に装着する時は、透光カバー体3の2箇所にそれぞれ取り付けられた支持具21の一対のアーム部23を、その上端から取付孔9に挿入する(図2(a)参照)。   When the translucent cover body 3 is attached to the cylindrical body 2 of the downlight 1, the pair of arm portions 23 of the support 21 respectively attached to the two locations of the translucent cover body 3 are attached from the upper end to the mounting holes. 9 (see FIG. 2A).

そして、支持具21を取り付けた透光カバー体3を、その筒部11を筒状本体2の下端開口7内に嵌合していく。すると、一対のアーム部23が、その弾力で取付孔9内で上昇しながら拡開し、その弾力により、透光カバー体3が筒状本体2の下部開口7内に完全に嵌合した状態で保持される(図1(c)、図2(b)参照)。   Then, the translucent cover body 3 to which the support 21 is attached is fitted into the lower end opening 7 of the tubular body 2 with the tubular portion 11. Then, a pair of arm parts 23 are expanded in the attachment hole 9 by the elasticity, and the translucent cover body 3 is completely fitted in the lower opening 7 of the cylindrical main body 2 by the elasticity. (See FIGS. 1C and 2B).

透光カバー体3の筒部11の第1の支持部15および第2の支持部16に取り付けられた2つの支持具21は、例えば、金属片(鉄片等)で形成され、通常は黒色以外の色である。しかし、本発明では、2つの支持具21のうち、一つの支持具21は、黒色に着色する。この着色は、例えば、塗装やスプレーで塗料を塗布して黒色とする。   The two support tools 21 attached to the first support portion 15 and the second support portion 16 of the cylindrical portion 11 of the translucent cover body 3 are formed of, for example, a metal piece (iron piece or the like), and are usually other than black Is the color. However, in the present invention, one of the two support tools 21 is colored black. This coloring is, for example, made black by applying a paint by painting or spraying.

(作用)
以上の構成から成る本発明に係るダウンライト1の作用を説明する。ダウンライト1の上部を断熱材でカバーしたような場合は、ダウンライト1は、ランプ5(電球)の熱が放散しにくいために、筒状本体2の内部に熱がこもってしまいダウンライト1の温度は上昇する。
(Function)
The operation of the downlight 1 according to the present invention having the above configuration will be described. When the upper part of the downlight 1 is covered with a heat insulating material, the downlight 1 is hard to dissipate the heat of the lamp 5 (bulb), so the heat is trapped inside the cylindrical body 2 and the downlight 1 Temperature rises.

ダウンライト1の温度が上昇し、透光カバー体3の温度が上昇した場合、透光カバー体3の筒部11の2箇所に取り付けた2つの支持具21のうち、第1の支持部15に取り付けた支持具21を黒色とした場合は、第2の支持部16に取り付けた黒色ではない支持具21に較べて、熱を吸収し易く、温度上昇度が速い。   When the temperature of the downlight 1 rises and the temperature of the translucent cover body 3 rises, the first support portion 15 out of the two supports 21 attached to the two portions of the cylindrical portion 11 of the translucent cover body 3. When the support tool 21 attached to is black, it is easier to absorb heat and the temperature rise is faster than the non-black support tool 21 attached to the second support portion 16.

その結果、第1の支持部15に取り付けた黒色の支持具21は、第2の支持部16に取り付けた支持具21に較べて高温となるので、その熱を受けて、第1の支持部15は、図5(a)に示すように、第2の支持部16より速く溶けてしまい、第1の支持部15の第1の支持孔18は、第2の支持部16の支持孔19より速く破断してしまう。   As a result, the black support tool 21 attached to the first support part 15 has a higher temperature than the support tool 21 attached to the second support part 16, so that the first support part receives the heat. As shown in FIG. 5A, 15 melts faster than the second support portion 16, and the first support hole 18 of the first support portion 15 is supported by the support hole 19 of the second support portion 16. It breaks faster.

第1の支持部15のみが溶けて第1の支持孔18が破断すると、第1の支持部15の黒色の支持具21が第1の支持部15から外れ、第2の支持部16に取り付けた支持具21は外れない。これにより、透光カバー体3は、図5(b)に示すように、筒状本体2から、第1の支持部15側だけ外れて開き、落下するようなことはない。   When only the first support 15 is melted and the first support hole 18 is broken, the black support 21 of the first support 15 is detached from the first support 15 and attached to the second support 16. The support 21 does not come off. Thereby, as shown in FIG.5 (b), the translucent cover body 3 opens from the cylindrical main body 2, only the 1st support part 15 side, and does not fall.

このため、ダウンライト1の落下事故を防止でき、しかも、ダウンライト1の筒状本体2内にこもっていた熱は、透光カバー体3が片側に開いた部分から放散するので、ダウンライト1の筒状本体2およびその内部の温度は、抑制されて、それ以上は上昇しない。その後、使用者は、必要に応じて、新しい透光カバー体3或いはダウンライト1全体を付け替えればよい。   For this reason, the fall accident of the downlight 1 can be prevented, and the heat confined in the cylindrical body 2 of the downlight 1 is dissipated from the portion where the translucent cover body 3 is opened on one side. The cylindrical main body 2 and the temperature inside thereof are suppressed and do not rise any further. Thereafter, the user may replace the new translucent cover body 3 or the entire downlight 1 as necessary.

(変形例)
上記実施例1では、第1の支持部15に取り付けられた支持具21を黒色に塗装したが、逆に、第1の支持部15に取り付けられた支持具21は特に着色することなく、第2の支持部16に取り付けられた支持具21を白色に塗装して吸熱しにくくすると、白色の支持具21の温度上昇は、第1の支持部15に取り付けられた支持具に較べて遅くなる。
(Modification)
In the first embodiment, the support 21 attached to the first support 15 is painted black, but conversely, the support 21 attached to the first support 15 is not particularly colored, When the support tool 21 attached to the second support part 16 is painted white to make it difficult to absorb heat, the temperature rise of the white support tool 21 becomes slower than that of the support tool attached to the first support part 15. .

その結果、第1の支持部15がより速く溶けて第1の支持孔18は破断し、上記実施例1の場合(図5(b)参照)と同様に、透光カバー体3は、筒状本体2から第1の支持部15側だけ外れて開き、落下するようなことはない。   As a result, the first support portion 15 melts faster and the first support hole 18 breaks, and the translucent cover body 3 has a cylindrical shape as in the case of the first embodiment (see FIG. 5B). The first main body 15 is not separated from the main body 2 and is not opened and dropped.

また、第2の支持部16に取り付けた支持具21を白色に塗装して吸熱しにくくするともに、第1の支持部15に取り付けた支持具21を黒色に塗装して吸熱しやすくすれば、第1の支持具21と第2の支持具21の吸熱乃至溶けやすさの度合いは、より大きな差が生じる。   If the support 21 attached to the second support 16 is painted white to make it difficult to absorb heat, and the support 21 attached to the first support 15 is painted black to make it easy to absorb heat, There is a greater difference in the degree of heat absorption or melting between the first support member 21 and the second support member 21.

そのため、ダウンライト1の異常加熱の際に、第1の支持部15が溶けその支持孔21が破断する速度が相対的に速くなるので、第1の支持部15のみ筒状本体2から、確実に外れることとなる。   Therefore, when the downlight 1 is abnormally heated, the speed at which the first support portion 15 melts and the support hole 21 breaks is relatively high, so that only the first support portion 15 is reliably removed from the cylindrical main body 2. It will come off.

なお、第1の支持部15に取り付けた第1の支持具21および第2の支持部16に取り付けた第2の支持具21を樹脂で成形し、いずれにも着色はしないが、第1の支持具を第2の支持具より、より速く溶けやすい樹脂材料で形成することで、第1の支持具と、第1の支持部15(又は捩りばね20)との取付構造を、第2の支持具に較べてより速く破断するような構成としてもよい。   The first support 21 attached to the first support 15 and the second support 21 attached to the second support 16 are molded with resin, and neither of them is colored, but the first By forming the support tool from a resin material that is easier to melt than the second support tool, the mounting structure of the first support tool and the first support portion 15 (or torsion spring 20) can be changed to the second support tool. It is good also as a structure which breaks faster compared with a support tool.

次に本発明に係るダウンライトの実施例2について図6によって以下説明する。実施例2は、実施例1とほぼ同じ構成(同じ構成部分は同じ符号を引用する。)であり、特に、筒状本体2は全く同じ構成であるが、透光カバー体30は実施例1と次のとおり異なる特徴的な構成を備えている。   Next, a second embodiment of the downlight according to the present invention will be described with reference to FIG. The second embodiment has substantially the same configuration as the first embodiment (the same components are referred to by the same reference numerals). In particular, the cylindrical main body 2 has the same configuration, but the translucent cover 30 is the first embodiment. It has a different characteristic configuration as follows.

即ち、実施例1は、二つの支持具21、21の色を互いに変えて、両者の昇温速度に差をつけて第1の支持部15が先に溶けて第1の支持孔18が破断することで、透光カバー体3を第1の支持部15側のみ開く構成とした。   That is, in the first embodiment, the colors of the two support tools 21 and 21 are changed from each other, the temperature rising speeds of the two support tools 21 are changed, the first support portion 15 is melted first, and the first support hole 18 is broken. By doing so, it was set as the structure which opens the translucent cover body 3 only in the 1st support part 15 side.

しかし、この実施例2では、二つの支持具21、21の構成(材質、色、形状等)は互いに同じであるが、透光カバー体30の筒部11に形成された第1の支持部31と第2の支持部32について、筒部11において、第1の支持孔18が形成される部分33と第2の支持孔19が形成される部分33’の材質を互いに異なるように形成した。   However, in the second embodiment, the configurations (material, color, shape, etc.) of the two support tools 21, 21 are the same, but the first support portion formed on the cylindrical portion 11 of the translucent cover body 30. 31 and the second support portion 32, the cylindrical portion 11 is formed such that the material of the portion 33 where the first support hole 18 is formed and the portion 33 ′ where the second support hole 19 is formed are different from each other. .

このような構成とすることで、ダウンライト1が異常に加熱されて第1の支持部31と第2の支持部32の温度が上昇した際、第1の支持孔18が第2の支持孔19より速く溶けて先に破断するような構成とした。   With this configuration, when the downlight 1 is abnormally heated and the temperatures of the first support portion 31 and the second support portion 32 rise, the first support hole 18 becomes the second support hole. The structure was such that it melted faster than 19 and broke first.

具体的には、この実施例2の透光カバー体30は、その筒部11の対向する二箇所には、図6(a)に示すように、第1の支持部31と第2の支持部32が形成されている。そして、透光カバー体30は、全体的には樹脂(例.ポリカーボネート等)で成形されているが、例えば、第1の支持部31を構成する筒部11の部分33のみは、透光カバー体10の他の部分に較べて熱で溶けやすい材料又は同じ材料でも溶けやすい配合の材料で形成されている。   Specifically, the translucent cover body 30 according to the second embodiment has a first support portion 31 and a second support portion at two opposing portions of the cylindrical portion 11 as shown in FIG. A portion 32 is formed. The translucent cover body 30 is entirely formed of a resin (eg, polycarbonate). For example, only the portion 33 of the cylindrical portion 11 constituting the first support portion 31 has a translucent cover. Compared to other parts of the body 10, it is formed of a material that is easily melted by heat or a material that is easily melted by the same material.

このような構成は、具体的には、異なる樹脂材料を組み合わせて一体成形するダブルモールド(二色成形)によって成形可能である。実施例2によれば、第1の支持部31は、第2の支持部32に較べてより速く溶け、第1の支持孔18は速く破断し、第1の支持部31に装着した支持具は脱落して、透光カバー体30は、実施例1と同様に第1の支持部31側のみ外れる。   Specifically, such a configuration can be formed by a double mold (two-color molding) in which different resin materials are combined and integrally molded. According to the second embodiment, the first support portion 31 melts faster than the second support portion 32, the first support hole 18 breaks faster, and the support device attached to the first support portion 31. Falls off, and the translucent cover 30 is removed only on the first support portion 31 side as in the first embodiment.

(変形例)
図6(b)は、実施例2の変形例を説明する図である。この変形例では、透光カバー体34の筒部11の第1の支持部35における筒部11の内面に切り欠き37を形成し、この切り欠き37内に、第1の支持孔18に一致する孔38を形成した金属片39(例.鉄片、鋼片等)を埋設して接着剤で接着する構成とした。なお、金属片39を第1の支持部35に埋設するのではなく、単に金属片39のような他の部材を固定する構成としてもよい。
(Modification)
FIG. 6B illustrates a modification of the second embodiment. In this modified example, a notch 37 is formed on the inner surface of the cylinder portion 11 in the first support portion 35 of the cylinder portion 11 of the translucent cover body 34 and coincides with the first support hole 18 in the notch 37. A metal piece 39 (e.g., iron piece, steel piece, etc.) in which a hole 38 to be formed is buried and bonded with an adhesive. Instead of embedding the metal piece 39 in the first support portion 35, another member such as the metal piece 39 may be simply fixed.

これにより、第1の支持部35を溶けにくくして、筒部11の第2の支持部36の第2の支持孔19が第1の支持部35より速く溶けて、第2の支持孔19のみは破断して、実施例1とは逆に、図示はしないが、第2の支持部36側のみ透光カバー体34が開く構成とした。   Accordingly, the first support portion 35 is hardly melted, and the second support hole 19 of the second support portion 36 of the cylindrical portion 11 is melted faster than the first support portion 35, so that the second support hole 19. However, although not shown, the translucent cover 34 is configured to open only on the second support portion 36 side.

次に本発明に係るダウンライトの実施例3について、図7によって以下説明する。実施例3は、実施例1、2とほぼ同じ構成(同じ構成については同じ符号を使用する。)であるが、その特徴的な構成は次のとおりである。   Next, a third embodiment of the downlight according to the present invention will be described with reference to FIG. The third embodiment has substantially the same configuration as the first and second embodiments (the same reference numerals are used for the same configuration), but the characteristic configuration is as follows.

即ち、実施例3では、二つの支持具21、21の構成(材質、色、形状等)は互いに同じであるが、実施例2と同様に、実施例3の透光カバー体40の第1の支持部41を第2の支持部42より速く溶けるようにして、第1の支持部41の支持孔18のみが破断するように形成した。   That is, in the third embodiment, the configurations (material, color, shape, etc.) of the two support tools 21 and 21 are the same as each other, but as in the second embodiment, the first of the translucent cover body 40 of the third embodiment. The support part 41 was melted faster than the second support part 42, so that only the support hole 18 of the first support part 41 was broken.

しかし、この実施例3では、実施例2のように2箇所に形成された第1の支持部および第2の支持部について、互いに異なる材質を使用するのではなく、図7(a)に示すように、第1の支持部41および第2の支持部42における筒部11の厚みを互いに異なるようにすることで、第1の支持部41が先に溶けて、第1の支持部41の支持孔18が先に破断するように形成した。   However, in the third embodiment, different materials are used for the first support portion and the second support portion formed in two places as in the second embodiment, and the first support portion and the second support portion are shown in FIG. Thus, by making the thickness of the cylinder part 11 in the 1st support part 41 and the 2nd support part 42 mutually differ, the 1st support part 41 melt | dissolves previously and the 1st support part 41 of The support hole 18 was formed so as to break first.

具体的には、筒部11の第1の支持部41における部分の厚みを、筒部11の第2の支持部42を含むそれ以外の部分の厚みより、図7(a)に示すように薄くすることで、より溶けやすい構成とした。これにより、ダウンライト1の異常加熱の際に、第1の支持部41の支持孔18は第2の支持部42の支持孔19に較べてより速く破断して、第1の支持部41の側のみ透光カバー体40は筒状本体2から開く構成とした。   Specifically, as shown in FIG. 7A, the thickness of the portion of the first support portion 41 of the cylindrical portion 11 is determined from the thickness of the other portion including the second support portion 42 of the cylindrical portion 11. By making it thinner, the structure is more easily melted. As a result, when the downlight 1 is abnormally heated, the support hole 18 of the first support portion 41 breaks faster than the support hole 19 of the second support portion 42, and the first support portion 41 The translucent cover body 40 is configured to open from the cylindrical main body 2 only on the side.

図7(b)は、 逆に、筒部11の第2の支持部42における部分の厚みを、筒部11の第1の支持部41を含むそれ以外の部分の厚みより、厚くすることで、第1の支持部41に較べて、遅く溶ける。この結果、相対的に、第1の支持部41の支持孔18は、第2の支持部42の支持孔19に較べて、より速く破断して、第1の支持部41側のみ透光カバー体40は筒状本体2から開く構成とした。   7B, conversely, the thickness of the portion of the second support portion 42 of the cylindrical portion 11 is made thicker than the thickness of the other portions including the first support portion 41 of the cylindrical portion 11. Compared to the first support part 41, it melts later. As a result, relatively, the support hole 18 of the first support portion 41 is broken faster than the support hole 19 of the second support portion 42, and only the first support portion 41 side is transparent. The body 40 is configured to open from the cylindrical main body 2.

(変形例)
図7(c)〜(g)は、実施例3の変形例を説明する図である。 第1の支持部41における支持孔18の形成されている部分の筒部11の上縁に切り欠き43を形成することで(図7(d)参照)、第2の支持部42(図7(e)参照)に較べて、第1の支持部41に形成した支持孔18と上縁の間の寸法を小さくして薄肉とした。
(Modification)
FIGS. 7C to 7G are diagrams illustrating a modification of the third embodiment. By forming a notch 43 in the upper edge of the cylindrical portion 11 in the portion where the support hole 18 is formed in the first support portion 41 (see FIG. 7D), the second support portion 42 (FIG. 7). Compared to (e), the dimension between the support hole 18 formed in the first support portion 41 and the upper edge is reduced to make it thinner.

逆に、第2の支持部42に突出縁部44を設けて厚肉としてもよい(図7(g)参照)。このような構成とすれば、第1の支持部41の支持孔18(図7(f)参照)は、第2の支持部42の支持孔19より速く溶けて破断するので、この変形例の透光カバー体45は第1の支持部41側のみ筒状本体2から開くことができる。   On the contrary, the projecting edge portion 44 may be provided on the second support portion 42 so as to be thick (see FIG. 7G). With such a configuration, the support hole 18 (see FIG. 7F) of the first support portion 41 melts faster and breaks than the support hole 19 of the second support portion 42. The translucent cover body 45 can be opened from the cylindrical main body 2 only on the first support portion 41 side.

さらに、図示はしないが、実施例3の別の変形例として、第1の支持部41の支持孔18を第2の支持部42の支持孔19より筒部11の上縁に近づけて形成することで、第1の支持部40の支持孔18を第2の支持部42の支持孔19より速く溶けて破断するような構成としてもよい。   Further, although not shown, as another modification of the third embodiment, the support hole 18 of the first support portion 41 is formed closer to the upper edge of the cylindrical portion 11 than the support hole 19 of the second support portion 42. Thus, the support hole 18 of the first support part 40 may be melted faster than the support hole 19 of the second support part 42 and broken.

この場合、第1の支持部40の支持孔18は、2の支持部42の支持孔19より上方に位置し、高さが若干異なるが、捩りばね20の一対のアーム部23が取付孔9への挿入および係合度合によって、この高さの差異は吸収され、特に問題は生じない。あるいは、支持孔18と支持孔19の大きさを変えることで、筒部11の上縁からの距離を異ならせ、第1の支持部40と第2の支持部42の溶ける度合いを異ならせてもよい。   In this case, the support hole 18 of the first support part 40 is located above the support hole 19 of the second support part 42 and has a slightly different height, but the pair of arm parts 23 of the torsion spring 20 are attached to the attachment hole 9. This height difference is absorbed by the insertion and the degree of engagement, and no particular problem occurs. Alternatively, by changing the sizes of the support hole 18 and the support hole 19, the distance from the upper edge of the cylindrical portion 11 is varied, and the degree of melting of the first support portion 40 and the second support portion 42 is varied. Also good.

以上、本発明に係るダウンライトを実施するための最良の形態を実施例に基づいて説明したが、本発明はこのような実施例に限定されるものではなく、特許請求の範囲に記載された技術的事項の範囲内でいろいろな実施例があることは言うまでもない。   The best mode for carrying out the downlight according to the present invention has been described based on the embodiments. However, the present invention is not limited to such embodiments, and is described in the claims. It goes without saying that there are various embodiments within the scope of technical matters.

本発明に係るダウンライトは、上記のような構成であり、浴室天井部に設置するダウンライトだけでなく、同様に湿気が多く透光カバー体を装着するに適した洗面室、その他の室のダウンライト、特に断熱材でカバーされかつ透光カバー体を装着して使用する場合に好適である。   The downlight according to the present invention is configured as described above, and is not only a downlight installed on the ceiling of the bathroom, but also a washroom suitable for mounting a translucent cover body having a high humidity, and other rooms. It is suitable for a downlight, particularly when it is covered with a heat insulating material and is used with a translucent cover body.

本発明に係るダウンライトの実施例1の斜視図であり、(a)は全体構成を示し、(b)、(c)は要部を示す。BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of Example 1 of the downlight which concerns on this invention, (a) shows the whole structure, (b), (c) shows the principal part. 本発明に係るダウンライトの実施例1の内部の構成を示し、(a)は透光カバー体を開いた状態を示し、(b)は透光カバー体を閉じた状態を示す。The internal structure of Example 1 of the downlight which concerns on this invention is shown, (a) shows the state which opened the translucent cover body, (b) shows the state which closed the translucent cover body. (a)は本発明に係るダウンライトの実施例1の透光カバー体の構成を示し、(b)は取付体を透光カバー体に取り付けた状態を示す。(A) shows the structure of the light transmission cover body of Example 1 of the downlight which concerns on this invention, (b) shows the state which attached the attachment body to the light transmission cover body. 本発明に係るダウンライトの取付体を透光カバー体に取り付けた状態を示し、(a)は正面図、(b)は(a)のA−A断面図であり、(c)は(a)の要部を示す図であり、(d)は(c)のB−B断面図である。The state which attached the attachment body of the downlight concerning this invention to the translucent cover body is shown, (a) is a front view, (b) is AA sectional drawing of (a), (c) is (a) (D) is a cross-sectional view taken along line BB of (c). 本発明に係るダウンライトの作用を説明する図である。It is a figure explaining the effect | action of the downlight which concerns on this invention. 本発明に係るダウンライトの実施例2を説明する図であり、(a)は透光カバー体の平面図であり、(b)〜(d)は実施例2の変形例を説明する図で、(b)は平面図、(c)は(a)の要部A拡大図、(d)はB−B断面図である。It is a figure explaining Example 2 of the downlight which concerns on this invention, (a) is a top view of a translucent cover body, (b)-(d) is a figure explaining the modification of Example 2. FIG. (B) is a top view, (c) is the principal part A enlarged view of (a), (d) is BB sectional drawing. 本発明に係るダウンライトの実施例3を説明する図であり、(a)、(b)は透光カバー体の平面図であり、(c)〜(g)は実施例3の変形例を説明する図であり、(c)は透光カバー体の平面図であり、(d)〜(g)は透光カバー体の筒部をA方向およびB方向に視認した図である。It is a figure explaining Example 3 of the downlight which concerns on this invention, (a), (b) is a top view of a translucent cover body, (c)-(g) is a modification of Example 3. It is a figure explaining, (c) is a top view of a translucent cover body, (d)-(g) is the figure which visually recognized the cylinder part of the translucent cover body in A direction and B direction.

符号の説明Explanation of symbols

1 ダウンライト
2 筒状本体
3、30、34、40、45 透光カバー体
4 取付体
5 投光用のランプ
6 電球ソケット
7 下端開口
8 筒状本体の側壁
9 取付孔
10 パッキン
11 透光カバー体の筒部
12 フランジ部
13 透光カバー本体
14 透光板
15、31、35、41 第1の支持部
16、32、36、42 第2の支持部
18 第1の支持孔
19 第2の支持孔
20 捩りばね
21 支持具
22 捩りばねのリング状の捩り部
23 捩りばねの一対のアーム部
24 支持具の内側部
25 支持具の外側部
26 支持具の係合部
27 支持具の係合孔
28 支持具の折曲げ片
37、43 切り欠き
38 孔
39 金属片
44 突出縁部
1 Downlight
2 Tubular body
3, 30, 34, 40, 45 Translucent cover body
4 Mounting body
5 Lamp for floodlight
6 Light bulb socket
7 Lower end opening
8 Side wall of cylindrical body
9 Mounting hole
10 Packing
11 Cylinder part of translucent cover body
12 Flange
13 Translucent cover body
14 Translucent plate
15, 31, 35, 41 1st support part
16, 32, 36, 42 Second support portion
18 First support hole
19 Second support hole
20 Torsion spring
21 Support
22 Ring-shaped torsion part of torsion spring
23 A pair of torsion spring arms
24 Inside the support
25 Outer part of support
26 Engagement part of support
27 Engagement hole of support
28 Bending pieces of support
37, 43 Notch
38 holes
39 Metal pieces
44 Protruding edge

Claims (5)

投光するランプと、ランプを内包し、下端面が開放された筒状本体と、筒状本体の下端面を覆う透光カバー体と、透光カバー体を筒状本体に取り付けるための複数の取付体とを備えたダウンライトであって、透光カバー体は複数の取付体を支持する複数の支持部を備え、取付体は透光カバー体の支持部に固定される支持具を各々備えており、透光カバー体の複数の支持部の温度上昇による溶ける度合いが互いに異なっており、異常加熱時に、複数の支持部のうち少なくとも1つ支持部で、透光カバー体が取付体から外れ、少なくとも1つの支持部で、透光カバー体が支持されることにより、筒状本体およびその内部の温度上昇を抑制することを特徴とするダウンライト。   A lamp for projecting light, a cylindrical main body containing the lamp and having a lower end surface open, a translucent cover body covering the lower end surface of the cylindrical main body, and a plurality of light-transmitting cover bodies for attaching the translucent cover body to the cylindrical main body A downlight including a mounting body, wherein the translucent cover body includes a plurality of support portions that support the plurality of mounting bodies, and each of the mounting bodies includes a support that is fixed to the support portion of the translucent cover body. The degree of melting of the plurality of support portions of the translucent cover body due to temperature rise is different from each other, and at the time of abnormal heating, the translucent cover body is detached from the attachment body at at least one of the plurality of support portions. The downlight is characterized in that the transparent body is supported by at least one support portion, thereby suppressing the temperature rise in the cylindrical main body and the inside thereof. 請求項1記載のダウンライトであって、透光カバー体の支持部は、取付体の支持具の熱を受けるように構成されており、複数の取付体の支持具の少なくとも1つの支持具に塗装が施されている、または複数の取付体の支持具が温度上昇による溶ける度合いの異なる材料で形成されていることを特徴とするダウンライト。   The downlight according to claim 1, wherein the support portion of the translucent cover body is configured to receive heat from the support body of the mounting body, and is attached to at least one of the support bodies of the plurality of mounting bodies. A downlight characterized by being coated or formed of materials having different degrees of melting due to an increase in temperature. 請求項1記載のダウンライトであって、透光カバー体の複数の支持部の材質、形状、もしくは厚みが互いに異なっていることを特徴とするダウンライト。   2. The downlight according to claim 1, wherein the plurality of support portions of the translucent cover body are different in material, shape, or thickness. 請求項1記載のダウンライトであって、透光カバー体の複数の支持部のうち、少なくとも1つの支持部に他の部材が埋設または固定されていることを特徴とするダウンライト。   2. The downlight according to claim 1, wherein another member is embedded or fixed to at least one of the plurality of support portions of the translucent cover body. 請求項1記載のダウンライトであって、透光カバー体の複数の支持部が孔で構成され、複数の孔の位置もしくは大きさが互いに異なっていることを特徴とするダウンライト。   The downlight according to claim 1, wherein the plurality of support portions of the translucent cover body are configured by holes, and the positions or sizes of the plurality of holes are different from each other.
JP2007167222A 2007-06-26 2007-06-26 Downlight Expired - Fee Related JP4858330B2 (en)

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