JP3548685B2

JP3548685B2 - Waterproof socket

Info

Publication number: JP3548685B2
Application number: JP15259698A
Authority: JP
Inventors: 伸通西浜; 鉱一田中
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 1998-06-02
Filing date: 1998-06-02
Publication date: 2004-07-28
Anticipated expiration: 2018-06-02
Also published as: JPH11345665A

Description

【０００１】
【発明の属する技術分野】
この発明は、蛍光灯の防水型照明器具等に取付けられる防水ソケットに関するものである。
【０００２】
【従来の技術】
従来例（例えば実公平７−３５９２号）を図８から図１０に示す。すなわち、この防水ソケットは、回転式ソケットすなわちランプピンを回動させることによりはさみ込んで導電接触するタイプの防水ソケットであって、ソケット本体１００のねじ筒部１０４の少なくとも一箇所にランプピン挿通溝１０４ａがあるため、ランプ口金部Ｌａの防水構造としては、防水パッキン１０２の舌片円周部１０２ａと当接するランプＬの管壁、防水パッキン１０２の凸部１０２ｂと当接する防水リング１０１の内面、およびソケット本体１００のねじ部１０４とこれに螺合する防水リング１０１との間のＯリング１０３の３箇所に設けており、防水部材は防水パッキン１０２とＯリング１０３のそれぞれ独立した２部品から構成されており、防水リング１０１の締付けにより防水パッキン１０２およびＯリング１０３を圧縮変形させることで、各部品の防水性を確保している。１０５はランプピンが給電のため接触する導電接触子である。
【０００３】
図１１はランプピンを突き合わせて導電接触するタイプの防水ソケットであり、この場合はランプピン挿通溝が不要なため、Ｏリングが不要であり、防水パッキン１０２のみでソケット本体１００とランプＬと防水リング１０１に密着して防水している。
【０００４】
【発明が解決しようとする課題】
しかし、挾み込み式の防水ソケットは、Ｏリングがあるため部品点数が多く、これを紛失しやすく、また密着面が多く摩擦抵抗が大きいので防水リングの締付け操作性が悪いという欠点があった。
したがって、この発明の目的は、ランプピン挿通溝を有するものにおいて、防水部品を削減するとともに、防水リングの締付けにより生じる防水部分の摩擦抵抗を低減し、従来のＯリングを圧縮変形させるための大きな力を必要とせず、防水リングの締付け操作性を向上させることができる防水ソケットを提供することである。
【０００５】
【課題を解決するための手段】
請求項１記載の防水ソケットは、前面にねじ筒部を有し、このねじ筒部内に直管蛍光灯を装着するランプ装着部を有するソケット本体と、
前記直管蛍光灯が挿通される略円筒状で前記ソケット本体の前記ねじ筒部に螺合する防水リングと、
この防水リング内に嵌められた略円筒状で前記直管蛍光灯が挿通される防水パッキンとを備え、
前記防水リングを前記ソケット本体の前記ねじ筒部に螺合して、前記防水リングで前記防水パッキンを前記ソケット本体側に押し付けることにより、前記直管蛍光灯および前記ソケット本体に前記防水パッキンを密着させて前記直管蛍光灯の前記ランプ装着部を防水するようにした防水ソケットにおいて、
前記ソケット本体は、前記ねじ筒部の少なくとも一箇所に内外貫通して前記直管蛍光灯のランプピンを挿通させ前記直管蛍光灯を前記ランプ装着部に配置させるランプピン挿通溝を設けるとともに、前記ランプピン挿通溝の後端面と同一平面上または前記後端面より奥の前記ねじ筒部の内底面に略環状の防水パッキン当接面を設け、
前記防水リングは、前端部に防水リング当接部を有し、
前記防水パッキンは、内周面にランプ当接面を有し、
前記防水リングを前記ねじ筒部に螺合することにより、前記ランプ当接面を前記直管蛍光灯に密着するとともに、前記防水リング当接部により前記防水パッキンの前端部を軸方向に押圧して後端部を前記防水パッキン当接面に当接したことを特徴とするものである。
【０００６】
請求項１記載の防水ソケットによれば、ソケット本体のランプピン挿通溝の後端面以上の奥のねじ筒部の内底面に、略環状の防水パッキン当接面を設け、防水パッキンの前端部を防水リングにより押圧して後端部をソケット本体内の防水パッキン当接面に当接させて防水構造としたため、従来例のＯリングを削減でき、Ｏリングの紛失の問題がなくなり、防水面も減らすことができる。その結果、防水リングの締付けによる防水パッキンへの摩擦力を低減し操作性を向上しながら、防水面への密着力を向上させることができ、従来より低コストかつ組立が容易で、さらに小さな締付け力の安定した防水性能が得られる。
【０００７】
請求項２記載の防水ソケットは、請求項1において、前記防水パッキンを前記防水リングに挿入し、前記防水リングを前記ねじ筒部に螺合して締付ける前の状態において、前記防水パッキンはその後端部を前記防水リングの外に突出する寸法をもつものである。
請求項２記載の防水ソケットによれば、請求項1と同様な効果のほか、防水リングに防水パッキンを挿入した状態で、ソケット本体のねじ部へ螺合しながら締めつける際、ランプピン挿通溝から防水パッキンの状態を確認できる。
【０００８】
請求項３記載の防水ソケットは、請求項１において、前記防水パッキンはその外側面中間部に、前記防水リングの内面に当接して前記防水リングに係止する外鍔部を設けたものである。
請求項３記載の防水ソケットによれば、請求項１と同様な効果のほか、防水パッキンの外鍔部を防水リングに係止すると、防水パッキンが抜けにくく外れにくくなる。
【０００９】
請求項４記載の防水ソケットは、請求項３において、前記外鍔部から前記防水パッキンの後端部までの長さを直管蛍光灯のランプピンの長さに略等しくしたものである。
請求項４記載の防水ソケットによれば、請求項３と同様な効果のほか、防水パッキンの全長が長くなり、防水リングの締付けストロークが長いのでリング締付け操作感がよくなる。
【００１０】
【発明の実施の形態】
この発明の一実施の形態を図１から図４により説明する。すなわち、この回転式ソケットの防水ソケットは、ソケット本体１と、防水リング２と、防水パッキン３とを有する。
ソケット本体１は、前面にねじ筒部１１を筒状に突出形成し、このねじ筒部１１に少なくとも一箇所に内外貫通して例えば直管蛍光灯を用いたランプＬのランプピンを挿入させるランプピン挿通溝１２を設け、ねじ筒部１１内にランプＬを配置するランプ装着部１３を設けている。実施の形態のランプ装着部１３はねじ筒部１１内の中央に立設した割り付き筒軸２０に回転自在に取付けた回転子１４を設け、回転子１４にその回転によりランプピン挿通溝１２に整合するランプピン装着溝１５を形成し、回転子１４に覆われるようにランプピンに接触する導電接触子（図示せず）をねじ筒部１１内の筒軸２０の周側面に配設している。ランプピン挿通溝１２を通してランプピン装着部１３のランプピン装着溝１５にランプピンを通した状態でランプピンを回転子１４とともに略９０度回転すると、ランプピンが導電接触子に接触して給電状態となる。またランプピン挿通溝１２の後端面と同一平面上または後端面より奥のねじ筒部１１の内底面に略環状の防水パッキン当接面１ａを設けている。１８は取付部である。
【００１１】
また防水リング２はランプＬを挿通する略円筒状に形成されており、ソケット本体１のねじ筒部１１に螺合するものであり、ねじ部１０を内周面に有する。防水リング２の前端部には内向き鍔状の防水リング当接部１６を設けている。この防水リング２の内に略円筒状でランプＬが挿通される防水パッキン３が配設されている。
【００１２】
防水パッキン３はその前端部を防水リング当接部１６に当接するとともに後端部を防水パッキン当接面１ａに当接する。実施の形態では、ソケット本体１のランプピン挿通溝１２の後端面以上の奥のねじ筒部１１の内底面すなわち防水パッキン当接面１ａに先端が当接する円筒部４と、ランプＬと防水リング２の円筒内面との間に挾装される主筒部５から構成される。円筒部４の断面積は主筒部５より小さく形成される。防水パッキン３の円筒部４のソケット本体１の防水パッキン当接面１ａとの当接面には、円筒部４の断面積よりも小さくなった略環状の凸部９を設けてある。また主筒部５の防水リング２の内面の防水リング当接部１６の当接面にも同様の凸部７を設けている。これらの凸部７、９は防水パッキン当接面１ａおよび防水リング当接部１６の当接面に対して線接触に近い状態で接触するようになっており、防水リング２をソケット本体１のねじ筒部１１に螺合して、防水リング２を締めつけることにより防水パッキン３に作用する摩擦力を低減することができる。
【００１３】
また主筒部５の前端近傍には薄肉部８を設け、薄肉部８の内周面にランプ当接面８ａを設けてあり、防水リング２の締付けにより防水リング当接部１６により軸方向に防水パッキン３に作用する圧縮力を、この薄肉部８でランプ管壁側へ変形させながら逃し、薄肉部８の内周面のランプ当接面８ａをランプ管壁に密着した後、ランプ軸方向へ防水パッキン３を圧縮するように作用し、このとき円筒部４の断面積を主筒部５より小さくしてあるため、ランプ軸方向の圧縮力は、円筒部４の先端の凸部９へ伝わりやすくなり、先述の防水パッキン３の２箇所の防水面に確実に密着力を加えることができ、従来よりも小さな締付け力で安定した防水性能が得られる。
【００１４】
また、防水パッキン３は、これを防水リング２に挿入して防水パッキン３の前端部を防水リング２の前端部に当接した状態で、防水パッキン３の後端部を防水リング２の外方に寸法ｂだけ突出させている。さらに防水パッキン３の円筒部４の中間部に防水リング２の内面に当接して防水リングに係止する外鍔部６を設けている。実施の形態では外鍔部６を係止凹部例えばねじ部１０に係止している。また外鍔部６を円筒部４と主筒部５との境界部の肉厚差による段部２４に連続するように形成している。そして外鍔部６から防水パッキン３の後端部すなわち凸部９までの長さをランプＬのランプピンの長さに略等しくしている。
【００１５】
この実施の形態は、防水リング２をソケット本体１のねじ筒部１１に螺合して、防水リング２で防水パッキン３をソケット本体１側に押し付けることにより、ランプＬ、ソケット本体１および防水リング２に防水パッキン３を密着させてランプＬのランプ装着部１３を防水する。
この実施の形態によれば、ソケット本体１のランプピン挿通溝１２の後端面以上の奥のねじ筒部１１の内底面に、略環状の防水パッキン当接面１ａを設け、防水パッキン３は前端部を防水リング当接部１６に当接させるとともに後端部をソケット本体１内の防水パッキン当接面１ａに当接させて防水構造としたため、従来例のＯリングを削減でき、Ｏリングの紛失の問題がなくなり、防水面も減らすことができる。その結果、防水リング２の締付けによる防水パッキン３への摩擦力を低減し操作性を向上しながら、防水面への密着力を向上させることができ、従来より低コストかつ組立が容易で、さらに小さな締付け力の安定した防水性能が得られる。
【００１６】
また、防水リング２の締付けにより防水パッキン３に作用する圧縮力を主筒部に設けた薄肉部８で逃がすことができ、また防水パッキン３の後端の円筒部４の肉厚を主筒部５より薄くしているため、ランプ軸方向の圧縮力は円筒部４の単位面積当たりに対して主筒部５より大きくなり、ソケット本体１との当接面にはさらに円筒部４の断面積よりも小さくなった凸部９を形成しているから、防水パッキン当接面１ａで生じる摩擦力を低減しながら、密着力を向上することができ、従来よりも小さな締付け力で安定した防水性能が得られる。
【００１７】
防水パッキン３を防水リング２に挿入して防水パッキン３の前端部を防水リング２の前端部に当接した状態で、防水パッキン３の後端部を防水リング２の外に突出させているため、防水リング２をソケット本体１にねじ込む際にまず防水パッキン３が防水パッキン当接面１ａに当接するのですぐに防水効果が得られ、かつ防水リング２の締付けによりゆるみ止め効果が得られる。またはさみ込みソケットの場合、ソケット本体１にランプピン挿通溝１２があり、防水リング２を防水パッキン３を挿入した状態で、ソケット本体１のねじ部１０へ螺合しながら締めつける際、ランプピン挿通溝１２から防水パッキン３の当接部分の密着状態を確認できる。従来は、防水リングの端面より内部に防水パッキンの装着状態だったため、どの位置まで防水リングを締付ければ防水性が保てるのか分かりにくかった。
【００１８】
また、防水パッキン３はその外側面中間部に、防水リング２の内面に当接して防水リング２に係止する外鍔部６を設けたため、防水パッキン３の外鍔部６を防水リング２に係止すると、防水パッキン２が抜けにくく外れにくくなる。すなわち、器具の使用状態から防水リング２を外した状態でも防水パッキン３が防水リング２から脱落することがなく、また防水パッキン３の主筒部５と円筒部４へ防水リング２の締付けにより作用する圧縮力を、段部２４または段部２４に連続した外鍔部６の位置を調整することで、段部２４をソケット本体１のねじ筒部１１の上端面に押し当てて、防水パッキン３の圧縮変形量を主筒部４と円筒部５で設定可能となり、例えば管径の異なるランプＬに対して、防水パッキン３のみの形状違い品により他の部品を共通化することができる。
【００１９】
さらに、外鍔部６から防水パッキン３の後端部すなわち凸部９までの長さをランプＬのランプピンの長さに略等しくしているため、防水パッキン３の全長が長くなり、防水リング２の締付けストロークが長いのでリング締付け操作感がよくなる。
なお、防水パッキン当接面１ａは、ランプピン挿通溝１２の後端面と同一平面上のねじ筒部１１の内底面に形成したが、ねじ筒部１１の内底面をランプピン挿通溝１２の後端面より奥になるように形成して、ランプピン挿通溝１２の後端面より奥のねじ筒部１１の内底面に略環状の防水パッキン当接面１ａを設けてもよい。
【００２０】
図５は、防水ソケットは前記と同じであるが、ランプＬの直径が（ａ）〜（ｃ）のように上記の実施の形態を示す（ｄ）〜（ｆ）と比べて小さい例である。この場合、防水パッキン３の薄肉部８が防水リング２の締付けに伴って（ｃ）から順次（ａ）に至るように大きく屈曲することにより管径の違いを吸収し、ランプ当接面８ａがランプＬの外周に密着する。なお、ランプＬの管径に合わせて防水パッキン３の断面積を大きくしたり、内径を変えることは可能である。
【００２１】
図６および図７は小径のランプＬに適応する防水リング２および防水パッキン３の他の実施の形態であり、防水リング２は中間に傾斜段部２３を設けて前端側を小径にし、前端部の防水リング当接部１６の傾斜面を大きくしている。防水パッキン３は防水リング２に合わせて主筒部５の径を小さくし、前端部を中心側に傾斜してその前端を防水リング当接部１６に当接する凸部７とし、前端内周縁をランプ当接面８ａとしている。防水リング２を締めつけると凸部７が防水リング当接部１６の傾斜に沿って径方向中心側に押されながら密着し、ランプ当接面８ａがランプＬに密着し、防水が得られる。
【００２２】
その他は、前記の実施の形態と同様である。
【００２３】
【発明の効果】
請求項１記載の防水ソケットによれば、ソケット本体のランプピン挿通溝の後端面以上の奥のねじ筒部の内底面に、略環状の防水パッキン当接面を設け、防水パッキンの前端部を防水リングにより押圧して後端部をソケット本体内の防水パッキン当接面に当接させて防水構造としたため、従来例のＯリングを削減でき、Ｏリングの紛失の問題がなくなり、防水面も減らすことができる。その結果、防水リングの締付けによる防水パッキンへの摩擦力を低減し操作性を向上しながら、防水面への密着力を向上させることができ、従来より低コストかつ組立が容易で、さらに小さな締付け力の安定した防水性能が得られる。
【００２４】
請求項２記載の防水ソケットによれば、請求項1と同様な効果のほか、防水リングに防水パッキンを挿入した状態で、ソケット本体のねじ部へ螺合しながら締めつける際、ランプピン挿通溝から防水パッキンの状態を確認できる。
請求項３記載の防水ソケットによれば、請求項１と同様な効果のほか、防水パッキンの外鍔部を防水リングに係止すると、防水パッキンが抜けにくく外れにくくなる。

【００２５】
請求項４記載の防水ソケットによれば、請求項３と同様な効果のほか、防水パッキンの全長が長くなり、防水リングの締付けストロークが長いのでリング締付け操作感がよくなる。
【図面の簡単な説明】
【図１】この発明の一実施の形態を示し、（ａ）は使用状態の一部破断側面図、（ｂ）は正面図である。
【図２】分解側面図である。
【図３】（ａ）は防水リングの締付け前の一部破断側面図、（ｂ）は防水リングおよび防水キャップの半断面側面図である。
【図４】（ａ）は防水リングを分離した状態の一部破断平面図、（ｂ）は防水リングを螺合して締付ける前の状態の一部破断平面図、（ｃ）は使用状態の一部破断平面図である。
【図５】（ａ）〜（ｃ）はランプの管径が小さい場合の防水リングの締付け動作を説明する一部破断側面図、（ｄ）〜（ｆ）はランプの管径が大きい場合の防水リングの締付け動作を説明する一部破断側面図である。
【図６】防水リングおよび防水パッキンの他の実施の形態を示し、（ａ）はその使用状態の一部破断側面図、（ｂ）はその正面図である。
【図７】分解側面図である。
【図８】従来例を示し、（ａ）は使用状態の一部破断側面図、（ｂ）はその正面図である。
【図９】その分解側面図である。
【図１０】従来例の防水リングの締付け前の状態の一部破断側面図、（ｂ）はその防水リングおよび防水パッキンの半断面側面図である。
【図１１】突き合わせ式のソケットを示し、（ａ）はその一部破断側面図、（ｂ）はその正面図である。
【符号の説明】
１ソケット本体
１ａ防水パッキン当接面
２防水リング
３防水パッキン
６外鍔部
１１ねじ筒部
１２ランプ挿通溝
１３ランプ装着部
１６防水リング当接部
Ｌランプ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a waterproof socket which is attached to a waterproof lighting device of a fluorescent lamp or the like.
[0002]
[Prior art]
FIGS. 8 to 10 show a conventional example (for example, Japanese Utility Model Publication No. Hei 7-3592). In other words, the waterproof socket is a rotary socket, that is, a waterproof socket of a type in which the lamp pin is rotated to rotate so as to be in contact with and electrically connected to the socket, and a lamp pin insertion groove 104 a is provided in at least one portion of the screw cylinder portion 104 of the socket body 100. Therefore, as the waterproof structure of the lamp base La, the tube wall of the lamp L abutting on the tongue piece circumferential portion 102a of the waterproof packing 102, the inner surface of the waterproof ring 101 abutting on the convex portion 102b of the waterproof packing 102, and the socket The O-ring 103 is provided at three places between the screw portion 104 of the main body 100 and the waterproof ring 101 screwed thereto, and the waterproof member is made up of two independent parts, a waterproof packing 102 and an O-ring 103. The waterproof packing 102 and the O-ring 103 are tightened by the waterproof ring 101. By causing condensation deformed so as to ensure the waterproof property of each component. Reference numeral 105 denotes a conductive contact that the lamp pin contacts for power supply.
[0003]
FIG. 11 shows a waterproof socket of a type in which the lamp pins are brought into contact with each other to make conductive contact. In this case, since the lamp pin insertion groove is not required, an O-ring is not required, and the socket body 100, the lamp L and the waterproof ring 101 are provided only by the waterproof packing 102. Closely waterproof.
[0004]
[Problems to be solved by the invention]
However, the pinch-type waterproof socket has disadvantages that the number of parts is large due to the presence of the O-ring, which is easily lost, and that the waterproof ring has poor tightening operability due to its large contact surface and large frictional resistance. .
Therefore, an object of the present invention is to reduce the number of waterproof parts, reduce the frictional resistance of a waterproof portion caused by tightening of a waterproof ring, and provide a large force for compressively deforming a conventional O-ring in a lamp having a lamp pin insertion groove. It is an object of the present invention to provide a waterproof socket capable of improving the operability of tightening a waterproof ring without requiring a waterproof socket.
[0005]
[Means for Solving the Problems]
The waterproof socket according to claim 1, wherein the socket body has a screw tube portion on the front surface, and a socket for mounting a straight tube fluorescent lamp in the screw tube portion;
A waterproof ring screwed into the screw tube portion of the socket body in a substantially cylindrical shape into which the straight tube fluorescent lamp is inserted,
A waterproof packing in which the straight tube fluorescent lamp is inserted in a substantially cylindrical shape fitted in the waterproof ring,
By screwing the waterproof ring to the threaded tube portion of the socket body and pressing the waterproof packing against the socket body side with the waterproof ring, the waterproof packing is closely attached to the straight tube fluorescent lamp and the socket body. In a waterproof socket which is made to waterproof the lamp mounting portion of the straight tube fluorescent lamp,
The socket body has a lamp pin insertion groove that penetrates at least one portion of the screw tube portion to penetrate the lamp pin of the straight tube fluorescent lamp, and arranges the straight tube fluorescent lamp in the lamp mounting portion. A substantially annular waterproof packing contact surface is provided on the inner bottom surface of the threaded tube portion on the same plane as the rear end surface of the insertion groove or deeper than the rear end surface,
The waterproof ring has a waterproof ring contact portion at a front end,
The waterproof packing has a lamp contact surface on an inner peripheral surface,
By screwing the waterproof ring to the screw tube portion, the lamp contact surface is brought into close contact with the straight tube fluorescent lamp, and the waterproof ring contact portion presses the front end of the waterproof packing in the axial direction. And a rear end portion of the contact portion abuts on the waterproof packing contact surface.
[0006]
According to the waterproof socket of the present invention, a substantially annular waterproof gasket contact surface is provided on the inner bottom surface of the screw cylinder portion deeper than the rear end surface of the lamp pin insertion groove of the socket body, and the front end of the waterproof gasket is waterproofed. Since the waterproof structure is made by pressing the rear end of the socket with the waterproof packing abutting surface in the socket body by pressing with the ring, the O-ring of the conventional example can be reduced, the problem of loss of the O-ring is eliminated, and the waterproof surface is also reduced. be able to. As a result, the frictional force against the waterproof packing due to the tightening of the waterproof ring is reduced, and the operability is improved, while the adhesion to the waterproof surface can be improved. Waterproof performance with stable power is obtained.
[0007]
In the waterproof socket according to claim 2, in the state before inserting the waterproof packing into the waterproof ring according to claim 1, and before screwing the waterproof ring to the screw cylinder portion and tightening, the waterproof packing is a rear end thereof. The portion has a dimension protruding out of the waterproof ring.
According to the waterproof socket described in claim 2, in addition to the same effects as in claim 1, when the waterproof packing is inserted into the waterproof ring and tightened while screwing into the threaded portion of the socket body, the waterproofing is performed from the lamp pin insertion groove. The condition of the packing can be checked .
[0008]
According to a third aspect of the present invention, there is provided the waterproof socket according to the first aspect, wherein the waterproof packing is provided at an intermediate portion of an outer surface thereof with an outer flange portion which abuts on an inner surface of the waterproof ring to be engaged with the waterproof ring. .
According to the waterproof socket of the third aspect, in addition to the same effects as those of the first aspect, when the outer flange portion of the waterproof packing is locked to the waterproof ring, the waterproof packing is hard to come off and hard to come off.
[0009]
According to a fourth aspect of the present invention, in the third aspect, the length from the outer flange to the rear end of the waterproof packing is substantially equal to the length of the lamp pin of the straight tube fluorescent lamp.
According to the waterproof socket of the fourth aspect, in addition to the same effects as those of the third aspect, the entire length of the waterproof packing is long and the tightening stroke of the waterproof ring is long, so that the feeling of tightening the ring is improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention will be described with reference to FIGS. That is, the waterproof socket of this rotary socket has a socket body 1, a waterproof ring 2, and a waterproof packing 3.
The socket main body 1 has a screw tube portion 11 formed in a cylindrical shape on the front surface thereof, and a lamp pin insertion for inserting a lamp pin of a lamp L using, for example, a straight tube fluorescent lamp by penetrating the screw tube portion 11 into and out of at least one place. A groove 12 is provided, and a lamp mounting portion 13 for arranging the lamp L in the screw tube portion 11 is provided. The lamp mounting portion 13 of the embodiment is provided with a rotor 14 rotatably mounted on a split cylindrical shaft 20 erected in the center of the screw cylindrical portion 11, and the rotor 14 is aligned with the lamp pin insertion groove 12 by the rotation thereof. A conductive contact (not shown) that contacts the lamp pin so as to be covered by the rotor 14 is disposed on the peripheral side surface of the cylindrical shaft 20 in the screw cylindrical portion 11. When the lamp pin is rotated approximately 90 degrees together with the rotor 14 while the lamp pin is passed through the lamp pin mounting groove 15 of the lamp pin mounting portion 13 through the lamp pin insertion groove 12, the lamp pin comes into contact with the conductive contact to be in a power supply state. A substantially annular waterproof packing contact surface 1a is provided on the inner bottom surface of the screw cylinder portion 11 on the same plane as the rear end surface of the lamp pin insertion groove 12 or behind the rear end surface. 18 is a mounting part.
[0011]
The waterproof ring 2 is formed in a substantially cylindrical shape through which the lamp L is inserted, and is screwed to the screw cylinder 11 of the socket body 1 and has a screw 10 on the inner peripheral surface. An inward flange-shaped waterproof ring contact portion 16 is provided at the front end of the waterproof ring 2. A waterproof packing 3 having a substantially cylindrical shape through which the lamp L is inserted is provided in the waterproof ring 2.
[0012]
The waterproof packing 3 has its front end in contact with the waterproof ring contact portion 16 and its rear end in contact with the waterproof packing contact surface 1a. In the embodiment, the cylindrical portion 4 whose tip abuts on the inner bottom surface of the screw cylinder portion 11 deeper than the rear end surface of the lamp pin insertion groove 12 of the socket body 1, that is, the waterproof packing contact surface 1a, the lamp L and the waterproof ring 2 And a main cylinder portion 5 sandwiched between the inner surface of the cylinder. The cross-sectional area of the cylindrical portion 4 is formed smaller than the main cylindrical portion 5. On the contact surface of the cylindrical portion 4 of the waterproof packing 3 with the waterproof packing contact surface 1a of the socket body 1, a substantially annular convex portion 9 smaller than the cross-sectional area of the cylindrical portion 4 is provided. A similar convex portion 7 is provided on the contact surface of the waterproof ring contact portion 16 on the inner surface of the waterproof ring 2 of the main cylinder portion 5. These convex portions 7 and 9 come into contact with the waterproof packing contact surface 1a and the contact surface of the waterproof ring contact portion 16 in a state close to a line contact. The frictional force acting on the waterproof packing 3 can be reduced by screwing the waterproof ring 2 into the threaded cylindrical portion 11.
[0013]
A thin portion 8 is provided in the vicinity of the front end of the main cylindrical portion 5, and a lamp contact surface 8 a is provided on the inner peripheral surface of the thin portion 8. The waterproof ring 2 is tightened by the waterproof ring contact portion 16 in the axial direction. The compressive force acting on the waterproof packing 3 is released while being deformed toward the lamp tube wall by the thin portion 8, and the lamp contact surface 8a on the inner peripheral surface of the thin portion 8 is brought into close contact with the lamp tube wall. Acts to compress the waterproof packing 3. At this time, since the cross-sectional area of the cylindrical portion 4 is smaller than that of the main cylindrical portion 5, the compressive force in the lamp axis direction is applied to the convex portion 9 at the tip of the cylindrical portion 4. It can be easily transmitted, and the adhesion can be reliably applied to the two waterproof surfaces of the waterproof packing 3 described above, so that a stable waterproofing performance can be obtained with a smaller tightening force than before.
[0014]
When the waterproof packing 3 is inserted into the waterproof ring 2 and the front end of the waterproof packing 3 is in contact with the front end of the waterproof ring 2, the rear end of the waterproof packing 3 is placed outside the waterproof ring 2. At a distance b. Further, an outer flange portion 6 is provided at an intermediate portion of the cylindrical portion 4 of the waterproof packing 3 so as to be in contact with the inner surface of the waterproof ring 2 and to be engaged with the waterproof ring. In the embodiment, the outer flange portion 6 is locked to a locking concave portion, for example, a screw portion 10. Further, the outer flange portion 6 is formed so as to be continuous with the step portion 24 due to a difference in thickness at a boundary portion between the cylindrical portion 4 and the main cylindrical portion 5. The length from the outer flange portion 6 to the rear end portion of the waterproof packing 3, that is, the convex portion 9 is substantially equal to the length of the lamp pin of the lamp L.
[0015]
In this embodiment, the waterproof ring 2 is screwed into the screw cylinder 11 of the socket body 1 and the waterproof packing 3 is pressed against the socket body 1 by the waterproof ring 2, so that the lamp L, the socket body 1 and the waterproof ring The waterproof packing 3 is brought into close contact with 2 to waterproof the lamp mounting portion 13 of the lamp L.
According to this embodiment, a substantially annular waterproof packing contact surface 1a is provided on the inner bottom surface of the screw cylinder portion 11 deeper than the rear end surface of the lamp pin insertion groove 12 of the socket body 1, and the waterproof packing 3 is provided at the front end portion. Abuts the waterproof ring abutting portion 16 and the rear end thereof abuts against the waterproof packing abutting surface 1a in the socket body 1 to provide a waterproof structure. Therefore, the O-ring of the conventional example can be reduced, and the O-ring is lost. Problem is eliminated, and the waterproof surface can be reduced. As a result, the frictional force on the waterproof packing 3 due to the tightening of the waterproof ring 2 can be reduced, and the operability can be improved, while the adhesion to the waterproof surface can be improved. Stable waterproof performance with small tightening force can be obtained.
[0016]
Further, the compression force acting on the waterproof packing 3 by tightening the waterproof ring 2 can be released by the thin portion 8 provided on the main cylinder portion, and the thickness of the cylindrical portion 4 at the rear end of the waterproof packing 3 can be reduced by the main cylinder portion. 5, the compressive force in the lamp axis direction becomes larger than the main cylinder 5 per unit area of the cylinder 4, and the contact area with the socket body 1 further has a cross-sectional area of the cylinder 4. Since the projections 9 are smaller than those of the prior art, the adhesion can be improved while reducing the frictional force generated at the waterproof packing contact surface 1a. Is obtained.
[0017]
Since the waterproof packing 3 is inserted into the waterproof ring 2 and the front end of the waterproof packing 3 is in contact with the front end of the waterproof ring 2, the rear end of the waterproof packing 3 is projected outside the waterproof ring 2. When the waterproof ring 2 is screwed into the socket body 1, the waterproof packing 3 first comes into contact with the waterproof packing contact surface 1a, so that the waterproof effect can be obtained immediately, and the loosening effect can be obtained by tightening the waterproof ring 2. Alternatively, in the case of a pinched socket, there is a lamp pin insertion groove 12 in the socket body 1, and when the waterproof ring 2 is screwed into the threaded portion 10 of the socket body 1 with the waterproof packing 3 inserted, the lamp pin insertion groove 12 is used. Thus, the contact state of the contact portion of the waterproof packing 3 can be confirmed. In the past, since the waterproof packing was installed inside the end face of the waterproof ring, it was difficult to understand to which position the waterproof ring should be tightened to maintain waterproofness.
[0018]
In addition, since the waterproof packing 3 is provided with an outer flange 6 at an intermediate portion on an outer surface thereof, the outer flange 6 abuts on the inner surface of the waterproof ring 2 and is locked to the waterproof ring 2. When locked, the waterproof packing 2 is hard to come off and hard to come off. That is, even when the waterproof ring 2 is removed from the use state of the appliance, the waterproof packing 3 does not fall off the waterproof ring 2, and works by tightening the waterproof ring 2 on the main cylindrical portion 5 and the cylindrical portion 4 of the waterproof packing 3. By adjusting the position of the step portion 24 or the outer flange portion 6 continuous with the step portion 24, the step portion 24 is pressed against the upper end surface of the threaded tube portion 11 of the socket body 1, and the waterproof packing 3 is pressed. Can be set by the main cylindrical portion 4 and the cylindrical portion 5, and for example, for lamps L having different tube diameters, other parts can be used in common by using only the waterproof packing 3 having a different shape.
[0019]
Further, since the length from the outer flange portion 6 to the rear end of the waterproof packing 3, that is, the convex portion 9, is substantially equal to the length of the lamp pin of the lamp L, the total length of the waterproof packing 3 becomes longer, Since the tightening stroke is long, the feeling of tightening the ring is improved.
The waterproof packing contact surface 1a is formed on the inner bottom surface of the screw tube portion 11 on the same plane as the rear end surface of the lamp pin insertion groove 12. A substantially annular waterproof packing contact surface 1 a may be provided on the inner bottom surface of the screw cylinder portion 11 deeper than the rear end surface of the lamp pin insertion groove 12.
[0020]
FIG. 5 shows an example in which the waterproof socket is the same as described above, but the diameter of the lamp L is smaller than (d) to (f) showing the above embodiment as in (a) to (c). . In this case, the thin portion 8 of the waterproof packing 3 is largely bent from (c) to (a) sequentially with the tightening of the waterproof ring 2 to absorb a difference in tube diameter, and the lamp contact surface 8a is reduced. It adheres to the outer periphery of the lamp L. Note that it is possible to increase the cross-sectional area of the waterproof packing 3 or change the inner diameter in accordance with the tube diameter of the lamp L.
[0021]
FIGS. 6 and 7 show another embodiment of the waterproof ring 2 and the waterproof packing 3 adapted to the small-diameter lamp L. The waterproof ring 2 is provided with an inclined step portion 23 in the middle to reduce the diameter at the front end side and to reduce the front end portion. Of the waterproof ring contact portion 16 of FIG. The waterproof packing 3 reduces the diameter of the main tubular portion 5 in accordance with the waterproof ring 2, inclines the front end portion toward the center side, forms a convex portion 7 in which the front end contacts the waterproof ring contact portion 16, and forms an inner peripheral edge of the front end. It is a lamp contact surface 8a . When the waterproof ring 2 is tightened, the convex portion 7 is pressed against the center in the radial direction along the inclination of the waterproof ring contact portion 16 and is brought into close contact with the lamp contact surface 8a .
[0022]
Others are the same as the above-mentioned embodiment.
[0023]
【The invention's effect】
According to the waterproof socket of the present invention, a substantially annular waterproof gasket contact surface is provided on the inner bottom surface of the screw cylinder portion deeper than the rear end surface of the lamp pin insertion groove of the socket body, and the front end of the waterproof gasket is waterproofed. The waterproof structure is made by pressing the rear end with the waterproof packing contact surface in the socket body by pressing with the ring , so the O-ring of the conventional example can be reduced, the problem of loss of the O-ring is eliminated, and the waterproof surface is also reduced. be able to. As a result, the frictional force against the waterproof packing due to the tightening of the waterproof ring is reduced, and the operability is improved, while the adhesion to the waterproof surface can be improved. Waterproof performance with stable power is obtained.
[0024]
According to the waterproof socket described in claim 2, in addition to the same effects as in claim 1, when the waterproof packing is inserted into the waterproof ring and tightened while screwing into the threaded portion of the socket body, the waterproofing is performed from the lamp pin insertion groove. The condition of the packing can be checked.
According to the waterproof socket of the third aspect, in addition to the same effects as those of the first aspect, when the outer flange portion of the waterproof packing is locked to the waterproof ring, the waterproof packing is hard to come off and hard to come off.

[0025]
According to the waterproof socket of the fourth aspect, in addition to the same effects as the third aspect, the overall length of the waterproof packing is long and the tightening stroke of the waterproof ring is long, so that the feeling of tightening the ring is improved.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, in which (a) is a partially cutaway side view in a used state, and (b) is a front view.
FIG. 2 is an exploded side view.
FIG. 3A is a partially cutaway side view of a waterproof ring before tightening, and FIG. 3B is a half sectional side view of a waterproof ring and a waterproof cap.
4A is a partially broken plan view showing a state where a waterproof ring is separated, FIG. 4B is a partially broken plan view showing a state before screwing and tightening a waterproof ring, and FIG. It is a partially broken plan view.
FIGS. 5A to 5C are partially cutaway side views for explaining a tightening operation of the waterproof ring when the lamp diameter is small, and FIGS. 5D to 5F when the lamp diameter is large. It is a partially broken side view explaining the fastening operation | movement of a waterproofing ring.
FIGS. 6A and 6B show another embodiment of a waterproof ring and a waterproof packing, in which FIG. 6A is a partially cutaway side view in a used state, and FIG. 6B is a front view thereof.
FIG. 7 is an exploded side view.
8A and 8B show a conventional example, in which FIG. 8A is a partially cutaway side view in a used state, and FIG. 8B is a front view thereof.
FIG. 9 is an exploded side view thereof.
FIG. 10 is a partially cutaway side view of a conventional waterproof ring before being tightened, and FIG. 10B is a half sectional side view of the waterproof ring and the waterproof packing.
11A and 11B show a butt-type socket, where FIG. 11A is a partially cutaway side view, and FIG. 11B is a front view thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Socket main body 1a Waterproof packing contact surface 2 Waterproof ring 3 Waterproof packing 6 Outer flange 11 Screw cylinder 12 Lamp insertion groove 13 Lamp mounting part 16 Waterproof ring contact L

Claims

A socket body having a screw tube portion on the front side and having a lamp mounting portion for mounting a straight tube fluorescent lamp in the screw tube portion,
A waterproof ring screwed into the screw tube portion of the socket body in a substantially cylindrical shape into which the straight tube fluorescent lamp is inserted,
A waterproof packing in which the straight tube fluorescent lamp is inserted in a substantially cylindrical shape fitted in the waterproof ring,
By screwing the waterproof ring to the threaded tube portion of the socket body and pressing the waterproof packing against the socket body side with the waterproof ring, the waterproof packing is closely attached to the straight tube fluorescent lamp and the socket body. In a waterproof socket which is made to waterproof the lamp mounting portion of the straight tube fluorescent lamp,
The socket body has a lamp pin insertion groove that penetrates at least one portion of the screw tube portion to penetrate the lamp pin of the straight tube fluorescent lamp, and arranges the straight tube fluorescent lamp in the lamp mounting portion. A substantially annular waterproof packing contact surface is provided on the inner bottom surface of the threaded tube portion on the same plane as the rear end surface of the insertion groove or deeper than the rear end surface,
The waterproof ring has a waterproof ring contact portion at a front end,
The waterproof packing has a lamp contact surface on an inner peripheral surface,
By screwing the waterproof ring to the screw tube portion, the lamp contact surface is brought into close contact with the straight tube fluorescent lamp, and the waterproof ring contact portion presses the front end of the waterproof packing in the axial direction. A waterproof socket, wherein a rear end portion of the socket contacts the waterproof packing contact surface.

Before the waterproof packing is inserted into the waterproof ring, and before the waterproof ring is screwed into the screw tube portion and fastened, the waterproof packing has a dimension such that its rear end projects outside the waterproof ring. The waterproof socket according to item 1.

2. The waterproof socket according to claim 1, wherein the waterproof packing is provided with an outer flange portion at an intermediate portion on an outer surface thereof, the outer flange portion being in contact with an inner surface of the waterproof ring and engaging with the waterproof ring.

The waterproof packing according to claim 3, wherein a length from the outer flange to a rear end of the waterproof packing is substantially equal to a length of a lamp pin of the straight tube fluorescent lamp.