JP2004329237A

JP2004329237A - Light for sewing machine

Info

Publication number: JP2004329237A
Application number: JP2003124722A
Authority: JP
Inventors: Yoshio Kumazaki; 佳男熊崎
Original assignee: Nippo Sewing Machine Co Ltd
Current assignee: Nippo Sewing Machine Co Ltd
Priority date: 2003-04-30
Filing date: 2003-04-30
Publication date: 2004-11-25

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light for a sewing machine capable of illuminating the needle location position and the periphery of the sewing machine, the hand part (bosom) of an operator and a sewing part of an object to be sewn, etc., to lightness suitable for sewing work in the sewing work. <P>SOLUTION: After fixing a fixing part 30 of the light 10 for the sewing machine to the arm part Aa of the sewing machine A by a magnet 31, the spherical member 41 or the like and cylindrical member 42 or the like of a supporting part 40 are turned and bent, and an illumination part 20 is variably adjusted to the direction and angle of emitting light toward the needle location position and the periphery of the sewing machine A. Also, the light emitted from the cold cathode tube 21 of the illumination part 20 and the light reflected by a reflector 23 are converged to a visual field angle by a converging sheet 22 and roughly equally emitted toward the hand part (bosom) of the operator and the sewing part of the object to be sewn with the needle location position of the sewing machine A as a center, and illumination for clearly viewing the needle location position of the sewing machine A, the hand part (bosom) of the operator and the sewing part of the object to be sewn with the eyes of the operator is obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば縫製作業において、縫製ミシンの針落ち位置及びその周辺を縫製作業に適した明るさに照光するときに用いられるミシン用ライトに関する。
【０００２】
【従来の技術】
従来、上述のミシン用ライトとしては、例えば縫製ミシンを構成するミシン針棒近傍に取付けた第１ランプ及び第２ランプから照射される光を、針落ち位置を中心として作業者の手元部分（ふところ）及び被縫製物の縫付け部分に向けて照射する特許文献１のランプ装置がある。
【０００３】
【特許文献１】
特開平９−１２２３７０号公報。
【０００４】
【発明が解決しようとする課題】
しかし、特許文献１のランプ装置は、第１ランプ及び第２ランプをミシン針棒近傍の定位置に取付けているため、作業者の要望及び縫製作業に適した取付け場所に変更することができない。また、第１ランプ及び第２ランプを露出した状態に取付けているので、例えば糸屑や油が付着しやすく、定期的に除去しなければならない。且つ、カバーで覆われているものに比べて、寿命がはるかに短く、短期間で交換しなければならないという問題点を有している。
【０００５】
また、縫製ミシンのアーム部上方から照光する照明装置（ランプ）も既に市販されているが、この装置は、例えばフレキシブルパイプやスライドパイプ等の支持アームに取付けた蛍光ランプから照射される光が縫製ミシンのアーム部で遮光されるため、作業者の手元部分（ふところ）及び被縫製物の縫付け部分を、作業者の眼で明確に見える明るさに照光することが難しく、被縫製物の縫付け部分に皺が付くか、縫い位置がズレたりする等して、被縫製物の仕上がり状態が悪くなる。且つ、作業者の眼に与える影響が大きく、疲労しやすいため、縫製作業が長時間行えないという問題点を有している。
【０００６】
この発明は上記問題に鑑み、照光部を、縫製ミシンの針落ち位置及びその周辺に向けて光が照射される状態に取付けることにより、縫製ミシンの針落ち位置及び作業者の手元部分（ふところ）、被縫製物の縫付け部分等を、作業者の眼で明確に見える明るさに照光することができるミシン用ライトの提供を目的とする。
【０００７】
【課題を解決するための手段】
この発明は、縫製ミシンの針落ち位置及びその周辺を縫製作業に適した明るさに照光するミシン用ライトであって、上記針落ち位置及びその周辺を照光する光源が内蔵された照光部と、上記照光部を上記縫製ミシンの所望する部分に対して固定する固定部とを連結すると共に、上記光源から照射される光が透過許容される透光体を、該光源と対向して上記照光部前面に形成した窓部全体が覆われる状態に取付けたミシン用ライトであることを特徴とする。
【０００８】
上述の光源は、例えば液晶表示装置の背面照明（バックライト）に用いられる冷陰極管や発光素子（ＬＥＤ）等の消費電力及び発熱量が少ないもので構成することができる。且つ、冷陰極管は、従来の蛍光ランプに比べて消費電力が少なく、約１／３程度の消費で済むと共に、振動及び衝撃に強く、耐久性に優れている。また、固定部は、例えば照光部全体の取付け状態を維持するのに必要な吸着力（磁力）を有するマグネットや面ファスナー、その維持に必要な負圧力を発生する吸着パッド、粘着力を有する両面粘着テープ、挟持力を有するクリップ、係止力を有する凹部材及び凸部材等で構成される。また、透光体は、例えば透光性及び透明性を有するプラスチックやガラス、集光機能を有する集光体（集光シート）等で構成することもできる。
【０００９】
つまり、縫製ミシンによる縫製作業において、固定部を、縫製ミシンの所望する部分（例えば縫製ミシンを構成するアーム部の下部及び側部、上部、後部、前部等）に固定して、照光部を、縫製ミシンの針落ち位置及びその周辺、作業者の手元部分（ふところ）、被縫製物の縫付け部分等に向けて光が照射される状態に取付ける。且つ、照光部の光源から照射される光を、窓部前面に取付けた透光体を透過させて、縫製ミシンの針落ち位置を中心として作業者の手元部分（ふところ）及び被縫製物の縫付け部分に向けて略均等に照射し、縫製ミシンの針落ち位置、作業者の手元部分（ふところ）、被縫製物の縫付け部分を、作業者の眼で明確に見える明るさに照光する。
【００１０】
実施の形態として、上記透光体を、上記光源から照射される光を視野角に集光する集光体で構成することができる。且つ、集光体は、例えばアクリル樹脂のプリズムパターン（略三角形状のパターン）を、透光性及び透明性を有するポリエステルシートの表面全体に対して略均一に精密成形したプラスチック製の光学フィルム（フィルムも含む）で構成され、光源から照射される光を、例えば略７０度までの視野角に集光（略正面方向に向けて集光）する。且つ、上述のアクリルやポリエステル以外のプラスチック、ガラス等で構成することもできる。
【００１１】
また、上記光源から照射される視野角外の光を上記集光体で集光される角度に反射する反射体を、上記光源の後部側と対向して照光部内部に設けることができる。且つ、反射体は、例えば光源から照射される視野角外の光を、集光体で集光される角度に反射する鏡面形状（例えば曲面や斜面、多面等）及び反射率を有する鏡面加工及び鏡面仕上げしたもの構成される。且つ、光源の後面側と対向する収容部内壁面を鏡面加工及び鏡面仕上げしてもよい。
【００１２】
また、上記照光部及び固定部の間を、上記縫製ミシンの針落ち位置を照光するのに適した方向及び角度に可変調節自在な支持部で連結することができる。且つ、支持部は、例えばフレキシブルパイプやスライドパイプ等を複数連結した自在継手構造、球状部材及び筒状部材を長さ方向に対して数珠繋ぎ状態に複数連結してなる自在継手構造等で構成することができる。
【００１３】
また、上記光源を、冷陰極管で構成することができるが、例えば発光素子（ＬＥＤ）等の消費電力及び発熱量が少ないもので構成することもできる。
【００１４】
【作用及び効果】
この発明によれば、照光部を、作業者の要望及び縫製作業に応じて、縫製ミシンの針落ち位置及びその周辺に向けて光が照射される状態に取付けるので、縫製ミシンの針落ち位置及び作業者の手元部分（ふところ）、被縫製物の縫付け部分等を、作業者の眼で明確に見える明るさに確実に照光することができると共に、縫製ミシンによる様々な縫製作業が正確且つ迅速に行え、所望及び良好な状態に縫製仕上げすることができる。
【００１５】
且つ、光源及び冷陰極管を照光部に内蔵するので、例えば糸屑や油等が付着したり、手や物等が当接したりせず、照光機能を長期間維持することができると共に、従来の蛍光ランプに比べて消費電力が少なく、耐久時間が長いため、その時期が到来するまで交換不要であり、振動及び衝撃に強く、経費の節約及び縫製コストの低減を図ることができる。
【００１６】
且つ、透光体の一例である集光体で、光源から照射される光及び反射板が反射する光を視野角に集光して照射するので、光源自体の光量を明るくする必要が無く、眼に優しい光量に抑えることができ、作業者の眼に与える影響を少なくすることができる。且つ、作業に適した明るさが集光により得られるため、光源自体の発熱を抑えて、作業者の手や被縫製物に対する熱の影響を少なくすることができる。
【００１７】
【実施例】
この発明の一実施例を以下図面に基づいて詳述する。
図面は、縫製作業において、縫製ミシンの針落ち位置及びその周辺を縫製作業に適した明るさに照光するミシン用ライトを示し、図１に於いて、このミシン用ライト１０は、縫製ミシンＡを構成するミシン針Ａｂの針落ち位置及びその周辺を作業者の眼で明確に見える明るさに照光する照光部２０と、縫製ミシンＡを構成するアーム部Ａａの所望する部分に対して固定される固定部３０と、照光部２０及び固定部３０の間を所望する方向及び角度に対して可変調節自在に連結する自在継手構造の支持部４０とで構成される。
【００１８】
上述の照光部２０は、図２及び図３にも示すように、例えば液晶表示装置の背面照明（バックライト）に用いられるような略Ｕ字状の冷陰極管２１を、略中空形状に形成した収容部２０ａの左側内部に内蔵し、冷陰極管２１から照射される光を視野角に集光する集光シート２２を、冷陰極管２１と対向して収容部２０ａの左側前面に開口した窓部２０ｂ前面が覆われる状態に取付け、冷陰極管２１の側部及び後部に向けて照射される光を反射する一つ又は複数の反射板２３を、冷陰極管２１の後部側と対向して収容部２０ｂ内部に配設している。且つ、冷陰極管２１の点灯及び消灯を制御する制御回路２４を、収容部２０ａの右側内部に内蔵している。また、複数本の冷陰極管２１を、収容部２０ａの左側内部に内蔵してもよい。
【００１９】
上述の冷陰極管２１は、光源の一例であり、正面側から見て略横長形状に形成した窓部２０ｂと略平行して、収容部２０ａの略中央部に形成した隔壁２０ｃの左側中央面に対して取付けられ、収容部２０ａの内壁面に対して接触が回避される状態に支持されている。且つ、冷陰極管２１の両端部を、収容部２０ａの右側内部に内蔵した制御回路２４に接続している。なお、冷陰極管２１は、従来の蛍光ランプに比べて消費電力が少なく、約１／３程度の消費で済む。また、冷陰極管２１の代わりに、例えば発光素子（ＬＥＤ）等のような消費電力及び発熱量が少ないものを用いることもできる。
【００２０】
前述の集光シート２２は、透光体及び集光体の一例であり、図４にも示すように、例えばアクリル樹脂のプリズムパターン２２ａ（略三角形状のパターン）を、透光性及び透明性を有するポリエステルシート２２ｂの表面全体に対して略均一に精密成形した光学フィルムで構成され、冷陰極管２１から照射される光及び後述する反射板２３が反射する光を、例えば略７０度までの視野角に集光（略正面方向に向けて集光）して窓部２０ｂ前方に向けて照射する。また、プリズムパターン２２ａの屈折率やパターンを変更すると、略７０度以下及び略７０度以上の視野角に集光することができる。
【００２１】
且つ、照光部２０の窓部２０ｂ全体が覆われる大きさ及び形状に形成すると共に、その窓部２０ｂ及び集光シート２２の対向縁部を、例えば接着剤で接着するか、超音波溶着機及び加熱ヒータで熱溶着する等して、ゴミや糸屑、虫、水等の侵入が防止される気密状態或いは水密状態にシール固定している。また、集光シート２２の代わりに、例えば略同等の透光性及び集光性を有するガラス板やガラスシート等を用いることもできる。
【００２２】
前述の反射板２３は、反射体の一例であり、図５にも示すように、冷陰極管２１から照射される光を効率よく反射するのに適した状態に鏡面加工及び鏡面処理され、冷陰極管２１の側部及び後部に向けて照射される視野角外の光を、上述の集光シート２２で集光される角度に反射する鏡面形状（例えば曲面や斜面、多面等）に形成している。
【００２３】
つまり、冷陰極管２１から照射される視野角外の光を、集光シート２２により集光される角度に反射板２３で反射させると共に、冷陰極管２１から照射される光及び反射板２３が反射する光を集光シート２２で視野角に集光して照射し、縫製ミシンＡの針落ち位置及びその周辺、作業者の手元部分（ふところ）、被縫製物の縫付け部分等を作業者の眼で明確に見える明るさに照光する。
【００２４】
且つ、電源（例えば一般家庭用又は工業用のコンセント）に接続されるプラグ付き電源コード２５を、照光部２０に内蔵された制御回路２４に接続（例えばコンデンサーを介して）し、その電源から供給される電流を通電及び遮断するための電源スイッチ２６を、照光部２０の前面（或いは側面、後面等）に配設している。また、コンデンサー（図示省略）を照光部２０に内蔵するか、電源スイッチ２６を電源コード２５の途中に設けることもできる。
【００２５】
且つ、上述の電源スイッチ２６の他に、例えば照光量を可変調節する光量調節スイッチ（図示省略）、照光時間を可変設定するタイマー等を設けてもよい。或いは、針落ち位置及び周辺の明るさを検知する明るさセンサーから出力される検知信号に基づいて、照光部２０を点灯及び消灯するか、照光部２０の照光量を可変調節する等してもよい。
【００２６】
前述の固定部３０は、照光部２０全体の取付け状態を維持するのに必要な吸着力（磁力）に励磁されると共に、その吸着力が充分に得られるような大きさ及び形状に形成した略円盤状のマグネット３１を、吸着面側が開口された凹状の収容部３２に嵌込み固定して構成している。且つ、マグネット３１は、縫製ミシンＡを構成する金属部分に対して吸着固定するか、縫製ミシンＡが設置された作業台の金属部分に対して吸着固定することができる。
【００２７】
且つ、前述の照光部２０を構成する突出部２７の後側中央部と、固定部３０を構成する収容部３２の後側中央部とを、後述する支持部４０で所望する方向及び角度に対して可変調節自在に連結している。
【００２８】
また、マグネット３１の代わりに、例えば照光部２０の取付け状態を維持するのに必要な吸着力を有する面ファスナー、それに必要な負圧力を発生する吸着パッド、粘着力を有する両面粘着テープ、挟持力を有するクリップ、係止力を有する凹部材及び凸部材等を用いてもよい。
【００２９】
前述の支持部４０は、図６、図７にも示すように、球状部材４１…及び筒状部材４２…を長さ方向に対して数珠繋ぎ状態に連結してなる自在継手構造を有し、球状部材４１を構成する軸部４１ａの一端側に形成した球体部４１ｂを、筒状部材４２の一端側に形成した受け部４２ａに嵌め込んで、所望する方向及び角度に対して回動可能に収容及び保持している。
【００３０】
且つ、球状部材４１の軸部４１ａを、筒状部材４２の一端側周縁部に形成した溝部４２ｂに嵌り込ませて、所望する角度に折曲げ自在に設けている。また、溝部４２ｂを筒状部材４２の他端側周縁部に形成するか、その一端側周縁部及び他端側周縁部に沿って複数形成する等してもよい。つまり、受け部４２ａに保持された球体部４１ｂの回動と、軸部４１ａを溝部４２ｂに嵌り込ませる動作との組み合わせで、照光部２０を、縫製ミシンＡを構成するミシン針Ａｂの針落ち位置及びその周辺、作業者の手元部分（ふところ）、被縫製物の縫付け部分等が作業者の眼で明確に見えるように照光される方向及び角度に可変調節する。
【００３１】
且つ、照光部２０側に連結される球状部材４１の球体部４１ｂを、照光部２０を構成する突出部２７の後側中央部に形成した受け部２７ａに嵌め込み、固定部３０を構成する収容部３２の上面側中央部に突設した軸部３２ａ先端の球体部３２ｂを、固定部３０側に連結される筒状部材４２の受け部４２ａに嵌め込み、軸部３２ａ，４１ａを、受け部２７ａの対向周縁部に形成した溝部２７ｂ，２７ｂを嵌り込ませて、照光部２０及び固定部３０を、所望する方向及び角度に対して回動自在に連結している。
【００３２】
なお、球状部材４１及び筒状部材４２の組付け数を多くすると、照光部２０の旋回半径及び回動角度を大きくすることができる。また、従来通り作業者側から見て左側から照光することもできる。且つ、球状部材４１及び筒状部材４２の代わりに、例えばフレキシブルパイプやスライドパイプ等の一方又は両方で構成される自在継手構造を用いてもよい。
【００３３】
加えて、図８に示すように、固定部３０の収容部３２に突設した軸部３２ａを、照光部２０の突出部２７に形成した受け部２７ａに直接嵌め込んで、照光部２０及び固定部３０を、所望する方向及び角度に対して回動自在に連結することもできる。また、その照光部２０及び固定部３０間に、１組又は複数組の球状部材４１及び筒状部材４２を介在してもよい。或いは、照光部２０を、縫製ミシンＡの所望する部分（アーム部Ａａ）に対して直接固定してもよい。
【００３４】
図示実施例は上記の如く構成するものにして、以下、縫製ミシンＡによる被縫作業において、針落ち位置及びその周辺、作業者の手元部分（ふところ）、被縫製物の縫付け部分を作業者の眼で明確に見える明るさにミシン用ライト１０で照光する方法を説明する。
【００３５】
先ず、図１及び図７に示すように、ミシン用ライト１０の固定部３０を、縫製ミシンＡを構成するアーム部Ａａ下部の所望する部分にマグネット３１で吸着固定した後、支持部４０の球状部材４１…と筒状部材４２…とを回動及び屈曲して、照光部２０を、縫製ミシンＡを構成する針落ち位置及びその周辺、作業者の手元部分（ふところ）、被縫製物の縫付け部分等に向けて光が照光される方向及び角度に可変調節する。また、固定部３０を、例えばアーム部Ａａの側部、上部、後部、前部等に固定してもよい。
【００３６】
次に、照光部２０の方向及び角度を調節後又は調節前において、電源コード２５を、例えば一般家庭用又は工業用のコンセント等の電源（図示省略）に接続した後、照光部２０の電源スイッチ２６をＯＮ操作して、冷陰極管２１から前部に向けて照射される光を、集光シート２２で略７０度の視野角に集光して、予め設定した略正面方向に向けて照射する。
【００３７】
且つ、冷陰極管２１から側部及び後部に向けて照射される視野角外の光を、反射板２３で集光シート２２で集光される角度に反射させ、集光シート２２で略７０度の視野角に集光して、照光部２０から照射される略全体の光を、縫製ミシンＡの針落ち位置を中心として作業者の手元部分（ふところ）及び被縫製物の縫付け部分に向けて略均等に照射するので、反射板２３が反射する光を利用しないときに比べて、略１．６倍〜略２．０倍に照度アップさせることができ、縫製ミシンＡの針落ち位置及びその周辺、作業者の手元部分（ふところ）、被縫製物の縫付け部分等を作業者の眼で明確に見える明るさに確実に照光することができる。
【００３８】
つまり、縫製ミシンＡによる縫製作業において、充分な明るさが得られるため、被縫製物の縫付け部分に皺が付いたり、縫い位置がズレたりせず、所望及び良好な状態に綺麗に縫製仕上げすることができ、様々な縫製作業が正確且つ迅速に行える。
【００３９】
以上のように、照光部２０を、作業者の要望及び縫製作業に応じて、縫製ミシンＡの針落ち位置及びその周辺に向けて光が照射される状態に固定部３０の吸着力で固定するので、縫製ミシンＡの針落ち位置及び作業者の手元部分（ふところ）、被縫製物の縫付け部分等を、作業者の眼で明確に見える明るさに確実に照光することができると共に、縫製ミシンＡによる様々な縫製作業が正確且つ迅速に行え、所望及び良好な状態に縫製仕上げすることができる。
【００４０】
且つ、冷陰極管２１を照光部２０に内蔵しているので、例えば糸屑や油が付着したり、手や物等が当接したりせず、照光機能を長期間維持することができると共に、従来の蛍光ランプに比べて消費電力が少なく、約１／３程度の消費で済むため、経済的である。また、約２万時間の耐久性を有しているため、通常の条件で使用した場合、その時期が到来するまで交換が不要（約１０年程）であり、振動及び衝撃に強く、経費の節約及び縫製コストの低減を図ることができる。
【００４１】
且つ、冷陰極管２１から照射される光及び反射板２３が反射する光を集光シート２２で視野角に集光して照度アップするので、冷陰極管２１の光量を明るくする必要が無く、眼に優しい光量に抑えることができるため、作業者の眼に与える影響を少なくすることができる。
【００４２】
且つ、支持部４０を回動及び屈曲して、照光部２０の高さ及び角度、方向を可変調節するので、作業者の要望及び縫製作業に応じて、作業者の手元部分（ふところ）及び被縫製物の縫付け部分を所望する方向（例えば左右及び前後、斜め上方等の様々な方向）から照光することができる。且つ、作業に適した明るさが集光により得られるため、冷陰極管２１自体の発熱を抑えて、作業者の手や被縫製物に対する熱の影響を少なくすることができる。
【図面の簡単な説明】
【図１】ミシン用ライトの取付け状態を示す作業側から見た斜視図。
【図２】ミシン用ライトの照光構造を示す断面図。
【図３】照光部の照光構造を示す縦断側面図。
【図４】集光シートの集光構造を示す断面図。
【図５】反射板の反射構造を示す説明図。
【図６】支持部の自在継手構造を示す側面図。
【図７】照光部を所望する方向に回動及び屈曲した状態を示す正面図。
【図８】照光部及び固定部を直結した他の例を示す正面図。
【符号の説明】
Ａ…縫製ミシン
１０…ミシン用ライト
２０…照光部
２１…冷陰極管
２２…集光シート
２３…反射板
２４…制御回路
２５…電源コード
２６…電源スイッチ
３０…固定部
３１…マグネット
４０…支持部[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine light used to illuminate a needle drop position of a sewing machine and its periphery to a brightness suitable for the sewing operation, for example, in a sewing operation.
[0002]
[Prior art]
Conventionally, as the sewing machine light described above, for example, light radiated from a first lamp and a second lamp attached near a sewing needle bar constituting a sewing sewing machine is focused on an operator's hand (center) around a needle drop position. ) And a lamp device that irradiates a sewn portion of a sewn object with the lamp device.
[0003]
[Patent Document 1]
JP-A-9-122370.
[0004]
[Problems to be solved by the invention]
However, in the lamp device of Patent Literature 1, the first lamp and the second lamp are mounted at fixed positions near the needle bar of the sewing machine. Also, since the first lamp and the second lamp are mounted in an exposed state, for example, lint or oil easily adheres and must be removed periodically. In addition, there is a problem that the life is much shorter than that covered with a cover, and it is necessary to replace it in a short period of time.
[0005]
An illumination device (lamp) that illuminates from above the arm portion of the sewing machine is already on the market. However, this device sews light emitted from a fluorescent lamp attached to a support arm such as a flexible pipe or a slide pipe. Since the light is shielded by the arm of the sewing machine, it is difficult to illuminate the worker's hand (foot) and the sewn part of the workpiece to a brightness that can be clearly seen by the operator's eyes. The finished part of the sewing object is deteriorated due to wrinkling of the attachment portion or deviation of the sewing position. In addition, there is a problem that the sewing operation cannot be performed for a long time because the influence on the eyes of the worker is large and the fatigue is easily caused.
[0006]
In view of the above-mentioned problem, the present invention mounts the illuminating portion in a state where light is emitted toward the needle drop position of the sewing machine and the periphery thereof, so that the needle drop position of the sewing machine and a hand portion (foot) of an operator are provided. It is another object of the present invention to provide a sewing machine light capable of illuminating a sewn portion or the like of an object to be sewn to a brightness clearly visible to an operator's eyes.
[0007]
[Means for Solving the Problems]
The present invention is a sewing machine light that illuminates a needle drop position of a sewing sewing machine and its surroundings to a brightness suitable for sewing work, and an illuminating unit incorporating a light source that illuminates the needle drop position and its surroundings, A light-transmitting member that allows the light emitted from the light source to pass therethrough is connected to a fixing portion that fixes the light-emitting portion to a desired portion of the sewing machine, and the light-emitting portion faces the light source. It is a light for a sewing machine mounted so that the entire window formed on the front surface is covered.
[0008]
The above-mentioned light source can be composed of, for example, a cold-cathode tube or a light-emitting element (LED) used for backlighting (backlight) of a liquid crystal display device, which consumes little power and generates little heat. In addition, the cold-cathode tube consumes less power than conventional fluorescent lamps, consumes about 1/3, is resistant to vibration and impact, and has excellent durability. Further, the fixing portion includes, for example, a magnet or a hook-and-loop fastener having an attraction force (magnetic force) necessary to maintain the attached state of the entire illuminating portion, an attraction pad for generating a negative pressure required to maintain the attachment portion, and a double-sided adhesive force. It is composed of an adhesive tape, a clip having a clamping force, a concave member and a convex member having a locking force, and the like. Further, the light-transmitting member may be made of, for example, plastic or glass having a light-transmitting property and transparency, a light-collecting member (light-collecting sheet) having a light-condensing function, or the like.
[0009]
That is, in the sewing operation by the sewing machine, the fixing portion is fixed to a desired portion of the sewing machine (for example, a lower portion and a side portion, an upper portion, a rear portion, a front portion, and the like of an arm portion constituting the sewing machine), and the illuminating portion is formed. The sewing machine is mounted in such a manner that light is emitted toward the needle drop position and its surroundings, the hand (foot) of the operator, the sewn portion of the workpiece, and the like. In addition, the light emitted from the light source of the illuminating unit is transmitted through a light-transmitting body attached to the front surface of the window to sew the hand part (foot) of the operator and the sewing object around the needle drop position of the sewing machine. Irradiation is performed substantially evenly toward the attachment portion to illuminate the needle drop position of the sewing machine, the hand portion (foot) of the operator, and the sewn portion of the sewing object to a brightness that can be clearly seen by the operator's eyes.
[0010]
As an embodiment, the light-transmitting member may be formed of a light collector that collects light emitted from the light source at a viewing angle. In addition, the light collector is a plastic optical film (for example, a plastic pattern in which a prism pattern (substantially triangular pattern) of, for example, an acrylic resin is approximately uniformly precision-molded over the entire surface of a translucent and transparent polyester sheet. The light emitted from the light source is condensed at a viewing angle of, for example, approximately 70 degrees (condensed substantially in the front direction). Further, it may be made of plastic, glass, or the like other than the above-mentioned acrylic and polyester.
[0011]
In addition, a reflector that reflects light emitted from the light source outside the viewing angle at an angle where the light is collected by the light collector may be provided inside the illumination unit so as to face the rear side of the light source. The reflector has, for example, a mirror surface shape (for example, a curved surface, an inclined surface, or a multi-surface) that reflects light outside the viewing angle emitted from the light source at an angle condensed by the light collector, and mirror processing having a reflectance. Mirror finished. In addition, the inner wall surface of the housing portion facing the rear surface side of the light source may be mirror-finished and mirror-finished.
[0012]
In addition, the illuminating section and the fixed section can be connected by a support section that can be variably adjusted in a direction and an angle suitable for illuminating the needle drop position of the sewing machine. In addition, the support portion is configured by a universal joint structure in which a plurality of flexible pipes, slide pipes, and the like are connected, a universal joint structure in which a plurality of spherical members and cylindrical members are connected in a daisy chain in the length direction, and the like. Can be.
[0013]
In addition, the light source can be configured by a cold cathode tube, but can also be configured by a light emitting element (LED) or the like that consumes less power and generates less heat.
[0014]
[Action and effect]
According to the present invention, the illuminating unit is attached to the needle drop position of the sewing machine and a state where light is emitted toward the periphery thereof in accordance with the demands of the worker and the sewing operation. In addition to being able to reliably illuminate the operator's hand (foot) and the sewn part of the workpiece to a clearly visible brightness with the operator's eyes, various sewing operations using a sewing machine can be performed accurately and quickly. Sewn to the desired and good condition.
[0015]
In addition, since the light source and the cold-cathode tube are built into the illuminating section, for example, lint or oil does not adhere, hands or objects do not come into contact, and the illuminating function can be maintained for a long time. As compared with the fluorescent lamp, the power consumption is small and the durability time is long. Therefore, it is not necessary to replace the fluorescent lamp until the time comes, it is resistant to vibration and impact, and it is possible to save costs and reduce sewing costs.
[0016]
In addition, since the light that is emitted from the light source and the light that is reflected by the reflector are collected at a viewing angle and irradiated with a light collector that is an example of a translucent body, there is no need to brighten the light amount of the light source itself, It is possible to suppress the light quantity to be gentle to the eyes, and to reduce the influence on the eyes of the worker. In addition, since light suitable for work can be obtained by condensing light, the heat generated by the light source itself can be suppressed, and the influence of heat on the hands of the operator and the sewing object can be reduced.
[0017]
【Example】
An embodiment of the present invention will be described below in detail with reference to the drawings.
The drawing shows a sewing machine light that illuminates the needle drop position of the sewing machine and its surroundings to a brightness suitable for the sewing work in the sewing work. In FIG. 1, the sewing machine light 10 is a sewing machine A. The illuminating section 20 for illuminating the needle drop position of the sewing machine needle Ab and its surroundings to a brightness that can be clearly seen by the operator's eyes, and is fixed to a desired portion of the arm section Aa configuring the sewing machine A. It is composed of a fixed part 30 and a support part 40 of a universal joint structure for variably connecting the illuminating part 20 and the fixed part 30 to a desired direction and angle.
[0018]
As shown in FIGS. 2 and 3, the illuminating section 20 is formed by forming a substantially U-shaped cold cathode tube 21 used for, for example, back lighting (backlight) of a liquid crystal display device into a substantially hollow shape. A light-collecting sheet 22 built in the inside of the left side of the accommodated portion 20a and condensing light emitted from the cold-cathode tube 21 at a viewing angle is opened on the left front surface of the accommodating portion 20a facing the cold-cathode tube 21. One or a plurality of reflectors 23, which are mounted in a state where the front surface of the window portion 20b is covered and reflect light emitted toward the side portion and the rear portion of the cold-cathode tube 21, face the rear portion of the cold-cathode tube 21. It is arranged inside the accommodating portion 20b. Further, a control circuit 24 for controlling the turning on and off of the cold cathode tubes 21 is built in the right side inside of the housing section 20a. Further, a plurality of cold cathode tubes 21 may be built in the inside of the left side of the housing portion 20a.
[0019]
The above-mentioned cold cathode tube 21 is an example of a light source, and is substantially parallel to the window portion 20b formed in a substantially horizontal shape when viewed from the front side, and is a left central surface of a partition wall 20c formed in a substantially central portion of the housing portion 20a. And is supported in a state where contact with the inner wall surface of the housing portion 20a is avoided. In addition, both ends of the cold cathode tube 21 are connected to a control circuit 24 built in the right inside of the housing portion 20a. The cold cathode tube 21 consumes less power than the conventional fluorescent lamp, and consumes about one third. Further, instead of the cold cathode tubes 21, for example, a light emitting element (LED) or the like having a small power consumption and a small amount of heat generation can be used.
[0020]
The above-described light-collecting sheet 22 is an example of a light-transmitting body and a light-collecting body. As shown in FIG. 4, for example, a prism pattern 22a (substantially triangular pattern) of acrylic resin is formed by translucent and transparent. The optical film is formed of an optical film that is formed approximately uniformly and precisely with respect to the entire surface of the polyester sheet 22b, and the light emitted from the cold-cathode tube 21 and the light reflected by the reflecting plate 23 described later are, for example, approximately 70 degrees. The light is condensed at a viewing angle (condensed substantially in the front direction) and is irradiated toward the front of the window 20b. When the refractive index and the pattern of the prism pattern 22a are changed, the light can be condensed at a viewing angle of about 70 degrees or less and about 70 degrees or more.
[0021]
The window 20b of the illuminating unit 20 is formed in a size and a shape that covers the entire window 20b, and the window 20b and the opposing edge of the light-condensing sheet 22 are bonded with, for example, an adhesive, or an ultrasonic welding machine. The seal is fixed in an airtight state or a watertight state in which intrusion of dust, lint, insects, water, and the like is prevented by, for example, heat welding with a heater. Further, instead of the light-collecting sheet 22, for example, a glass plate or a glass sheet having substantially the same light-transmitting and light-collecting properties can be used.
[0022]
The above-described reflector 23 is an example of a reflector. As shown in FIG. 5, the reflector 23 is mirror-finished and mirror-finished in a state suitable for efficiently reflecting light emitted from the cold-cathode tube 21. Light outside the viewing angle irradiated toward the side and rear of the cathode tube 21 is formed into a mirror-like shape (for example, a curved surface, an inclined surface, or a multi-surface) that reflects the light at an angle converged by the condensing sheet 22 described above. ing.
[0023]
That is, the light emitted from the cold cathode tube 21 is reflected by the reflector 23 at an angle converged by the condensing sheet 22 while the light emitted from the cold cathode tube 21 and the reflector 23 are reflected by the light condensing sheet 22. The reflected light is condensed to a viewing angle by the light condensing sheet 22 and irradiated, and the position of the needle drop of the sewing machine A and its surroundings, the hand part (foot) of the worker, the sewn part of the sewing object, and the like are displayed by the worker. It illuminates to a brightness that can be clearly seen with the eyes of the person.
[0024]
In addition, a power cord 25 with a plug connected to a power supply (for example, a general household or industrial outlet) is connected to a control circuit 24 built in the illumination unit 20 (for example, via a capacitor) and supplied from the power supply. A power switch 26 for energizing and interrupting the applied current is provided on the front surface (or side surface, rear surface, or the like) of the illumination unit 20. Further, a condenser (not shown) may be built in the illumination unit 20, or the power switch 26 may be provided in the power cord 25.
[0025]
Further, in addition to the power switch 26, for example, a light amount adjustment switch (not shown) for variably adjusting the illumination light amount, a timer for variably setting the illumination time, and the like may be provided. Alternatively, based on a detection signal output from a brightness sensor that detects the needle drop position and the surrounding brightness, the illumination unit 20 may be turned on and off, or the illumination amount of the illumination unit 20 may be variably adjusted. Good.
[0026]
The above-described fixing portion 30 is excited to a suction force (magnetic force) required to maintain the attached state of the entire illuminating portion 20, and is formed in a size and a shape such that the suction force is sufficiently obtained. A disk-shaped magnet 31 is configured to be fitted and fixed in a concave accommodating portion 32 having an open suction surface. In addition, the magnet 31 can be suction-fixed to a metal part of the sewing machine A, or can be suction-fixed to a metal part of a workbench on which the sewing machine A is installed.
[0027]
In addition, the rear central portion of the projecting portion 27 forming the illuminating portion 20 and the rear central portion of the housing portion 32 forming the fixing portion 30 are moved with respect to a direction and an angle desired by the support portion 40 described later. Variably connected.
[0028]
Instead of the magnet 31, for example, a hook-and-loop fastener having a suction force necessary to maintain the mounted state of the illuminating unit 20, a suction pad for generating a necessary negative pressure, a double-sided adhesive tape having an adhesive force, a clamping force , A concave member and a convex member having a locking force, or the like.
[0029]
As shown in FIGS. 6 and 7, the support portion 40 has a universal joint structure in which spherical members 41 and cylindrical members 42 are connected in a daisy chain in the length direction. The spherical portion 41b formed at one end of the shaft portion 41a constituting the member 41 is fitted into a receiving portion 42a formed at one end of the cylindrical member 42, and is housed so as to be rotatable in a desired direction and angle. And holding.
[0030]
Further, the shaft portion 41a of the spherical member 41 is fitted into a groove 42b formed on the peripheral edge on one end side of the cylindrical member 42, and is provided to be freely bent at a desired angle. Further, the groove 42b may be formed in the peripheral edge on the other end side of the cylindrical member 42, or a plurality of grooves 42b may be formed along the peripheral edge on one end side and the peripheral edge on the other end side. In other words, the combination of the rotation of the spherical body portion 41b held by the receiving portion 42a and the operation of fitting the shaft portion 41a into the groove portion 42b causes the illuminating portion 20 to drop through the needle needle Ab of the sewing needle Ab constituting the sewing machine A. The position and its periphery, the hand portion (foot) of the operator, the sewn portion of the sewing object, and the like are variably adjusted to the direction and angle of illumination so that the operator can clearly see it.
[0031]
Further, the spherical portion 41b of the spherical member 41 connected to the illuminating portion 20 is fitted into a receiving portion 27a formed at the rear central portion of the projecting portion 27 forming the illuminating portion 20, and the housing portion forming the fixing portion 30 A spherical portion 32b at the tip of a shaft portion 32a protruding from a central portion on the upper surface side of the upper surface 32 is fitted into a receiving portion 42a of a tubular member 42 connected to the fixed portion 30 side, and the shaft portions 32a and 41a are attached to the receiving portion 27a. The illuminating portion 20 and the fixed portion 30 are rotatably connected to a desired direction and angle by fitting grooves 27b, 27b formed in the opposite peripheral portion.
[0032]
When the number of the spherical members 41 and the cylindrical members 42 is increased, the turning radius and the turning angle of the illumination unit 20 can be increased. In addition, the light can be illuminated from the left side as viewed from the worker side as in the related art. Further, instead of the spherical member 41 and the cylindrical member 42, a universal joint structure composed of one or both of a flexible pipe and a slide pipe may be used.
[0033]
In addition, as shown in FIG. 8, the shaft portion 32 a protruding from the housing portion 32 of the fixing portion 30 is directly fitted into the receiving portion 27 a formed on the protruding portion 27 of the illuminating portion 20, and the illuminating portion 20 and the fixing portion are fixed. The part 30 can also be connected so as to be rotatable in a desired direction and angle. Also, one or more sets of spherical member 41 and cylindrical member 42 may be interposed between the illuminating section 20 and the fixing section 30. Alternatively, the illumination unit 20 may be directly fixed to a desired portion (arm portion Aa) of the sewing machine A.
[0034]
The illustrated embodiment is configured as described above. In the sewing operation by the sewing machine A, the needle drop position and its surroundings, the hand portion (foot) of the operator, and the sewing portion of the workpiece are sewn. A method of illuminating with the sewing machine light 10 a brightness that can be clearly seen with the eyes of the user will be described.
[0035]
First, as shown in FIGS. 1 and 7, the fixing portion 30 of the sewing machine light 10 is suction-fixed to a desired portion below the arm portion Aa constituting the sewing machine A with a magnet 31, and then the spherical portion of the support portion 40 is formed. By rotating and bending the members 41 and the tubular members 42, the illuminating section 20 is sewn to the needle drop position and its surroundings constituting the sewing machine A, the hand portion (foot) of the operator, and the sewing object. It is variably adjusted to a direction and an angle at which light is illuminated toward a mounting portion or the like. Further, the fixing portion 30 may be fixed to, for example, a side portion, an upper portion, a rear portion, a front portion, or the like of the arm portion Aa.
[0036]
Next, after or before adjusting the direction and angle of the illumination unit 20, the power cord 25 is connected to a power supply (not shown) such as a household or industrial outlet, and then the power switch of the illumination unit 20 is turned on. 26, the light emitted from the cold-cathode tube 21 toward the front is condensed to a viewing angle of approximately 70 degrees by the light condensing sheet 22 and is irradiated in a substantially set frontal direction. I do.
[0037]
In addition, light outside the viewing angle emitted from the cold-cathode tube 21 toward the side and the rear is reflected by the reflector 23 at an angle of being collected by the light-collecting sheet 22, and the light collected by the light-collecting sheet 22 is approximately 70 degrees. And the substantially entire light emitted from the illuminating unit 20 is directed to the hand (foot) of the worker and the sewn portion of the sewing object with the needle drop position of the sewing machine A as the center. Irradiance can be increased approximately 1.6 times to approximately 2.0 times compared to when the light reflected by the reflector 23 is not used, and the needle drop position of the sewing machine A and It is possible to reliably illuminate the surrounding area, the hand portion (foot) of the operator, the sewn portion of the workpiece, and the like to a brightness that can be clearly seen by the operator's eyes.
[0038]
In other words, in the sewing operation using the sewing machine A, sufficient brightness can be obtained, so that the sewn portion of the sewing object does not wrinkle or the sewing position is not shifted, and the sewing is finished neatly in a desired and favorable state. And various sewing operations can be performed accurately and quickly.
[0039]
As described above, the illuminating unit 20 is fixed by the suction force of the fixing unit 30 in a state in which light is irradiated toward the needle drop position of the sewing machine A and the vicinity thereof in accordance with the demand of the worker and the sewing operation. Therefore, the needle drop position of the sewing machine A, the hand portion (foot) of the operator, the sewn portion of the workpiece, and the like can be reliably illuminated to a brightness that can be clearly seen by the operator's eyes. Various sewing operations by the sewing machine A can be performed accurately and quickly, and the sewing can be finished in a desired and favorable state.
[0040]
In addition, since the cold cathode tube 21 is built in the illuminating section 20, for example, lint or oil does not adhere, hands or objects do not come into contact, and the illuminating function can be maintained for a long time. It is economical because it consumes less power than conventional fluorescent lamps and consumes about 1/3. In addition, since it has a durability of about 20,000 hours, when used under normal conditions, it is not necessary to replace it until the time comes (about 10 years), it is resistant to vibration and shock, and cost It is possible to save money and reduce sewing costs.
[0041]
In addition, since the light emitted from the cold cathode tube 21 and the light reflected by the reflector 23 are collected at a viewing angle by the light collecting sheet 22 to increase the illuminance, it is not necessary to brighten the light amount of the cold cathode tube 21, Since the amount of light can be suppressed to an eye-friendly amount, the influence on the eyes of the worker can be reduced.
[0042]
In addition, since the height, angle, and direction of the illuminating unit 20 are variably adjusted by rotating and bending the support unit 40, the operator's hand (foot) and cover can be adjusted according to the operator's request and sewing work. The sewn portion of the sewing product can be illuminated from a desired direction (for example, various directions such as left and right, front and rear, and obliquely upward). In addition, since the brightness suitable for the work is obtained by condensing, the heat generation of the cold cathode tube 21 itself can be suppressed, and the influence of heat on the hand of the worker and the sewing object can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a sewing machine light is attached, as viewed from a working side.
FIG. 2 is a cross-sectional view showing an illumination structure of the sewing machine light.
FIG. 3 is a vertical side view showing an illumination structure of an illumination unit.
FIG. 4 is a cross-sectional view showing a light-collecting structure of a light-collecting sheet.
FIG. 5 is an explanatory view showing a reflection structure of a reflection plate.
FIG. 6 is a side view showing a universal joint structure of a support portion.
FIG. 7 is a front view showing a state where the illuminating unit is turned and bent in a desired direction.
FIG. 8 is a front view showing another example in which the illumination unit and the fixing unit are directly connected.
[Explanation of symbols]
A: Sewing machine 10: Sewing machine light 20: Illumination unit 21: Cold cathode tube 22: Condenser sheet 23: Reflector 24: Control circuit 25: Power cord 26: Power switch 30: Fixed unit 31: Magnet 40: Support unit

Claims

A sewing machine light that illuminates the needle drop position of the sewing machine and its surroundings to a brightness suitable for sewing work,
An illuminating unit having a built-in light source for illuminating the needle drop position and its surroundings,
Attaching a fixing part for fixing the illuminating part to a desired part of the sewing machine,
A light for a sewing machine, wherein a light-transmitting body through which light emitted from the light source is allowed to pass is mounted so as to face the light source and cover an entire window formed on the front surface of the illumination unit.

2. The sewing machine light according to claim 1, wherein the light transmitting member is a light collector that collects light emitted from the light source at a viewing angle.

3. The light source according to claim 1, wherein a reflector that reflects light outside the viewing angle emitted from the light source at an angle at which the light is collected by the light collector is provided inside the illuminating unit facing the rear side of the light source. Light for sewing machine.

The sewing machine light according to claim 1, wherein the illuminating portion and the fixed portion are connected by a support portion that is variably adjustable in a direction and an angle suitable for illuminating a needle drop position of the sewing machine.

4. The sewing machine light according to claim 1, wherein said light source comprises a cold cathode tube.