JP2004089225A

JP2004089225A - Insulating structure for rice cooker

Info

Publication number: JP2004089225A
Application number: JP2002250676A
Authority: JP
Inventors: Toshiyasu Miyamoto; 宮本　利康; Manabu Tanimura; 谷村　学
Original assignee: Zojirushi Corp
Current assignee: Zojirushi Corp
Priority date: 2002-08-29
Filing date: 2002-08-29
Publication date: 2004-03-25
Anticipated expiration: 2022-08-29
Also published as: JP3868870B2

Abstract

<P>PROBLEM TO BE SOLVED: To improve an insulating sheet which is placed on a part requiring insulation being incorporated in a rice cooker main body, to prevent the insulating sheet from positionally slipping or being removed, and to stably mount the insulating sheet on the part. <P>SOLUTION: In this insulating structure for the rice cooker, an insulating sheet 31 is placed on a cord reel 16 which is incorporated in a body member 5. The insulating sheet 31 is formed into a U-shape cross section comprising an internal sheet part 34 and an external sheet part 33 which are confronted with each other on both of the internal and external surfaces of the cord reel 16, and a gusset part 32 which connects the end parts of the sheets parts 33 and 34 with each other along the bottom surface of the cord reel 16. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、炊飯器（炊飯ジャーを含む。）の絶縁構造に関し、特に要絶縁部品に被せられる絶縁シートの構造に関するものである。
【０００２】
【従来の技術】
一般に、炊飯器は、胴部材の内部に炊飯部、制御基板、コードリール等を収納し、上記胴部材の下部に底部材を取付けることにより炊飯器本体を構成し、該炊飯器本体に蓋を開閉自在に取付けた構成をなす。このうち、制御基板は、充電部であるプリント配線部分が外部に露出し、またコードリールは、その片面中央部に設けられたＡＣ電源接続用の端子が外部に露出する。外部に露出したプリント配線部分や電源端子はいずれも充電部である。
【０００３】
このように充電部は、他の部品等との間に十分な絶縁距離を保持するために、一般に所定の距離を置いたり絶縁物を介在したりする措置がとられる。このような措置は、電気的な絶縁を図るだけでなく、絶縁が何らかの原因で破壊されたことに伴う発火の危険を避けるためにも重要である。
【０００４】
一方、炊飯器の小型化の要請から、要絶縁部品と他の部品との間隔はますます小さく設計される傾向にあるため、小型化の要請に適した絶縁構造が求められている実情にある。
【０００５】
このような要請に応える絶縁構造として、特開２００１−３５２１８３号公報には、炊飯器本体の内部に取付けられた要絶縁部品に接近した炊飯器本体の内面に、左右一対のガイド片を設け、そのガイド片間に絶縁シートを挿入する構造が開示されている。
【０００６】
【解決しようとする課題】
しかしながら、上記の絶縁構造は、絶縁シートを取付けるために一対のガイド片を炊飯器本体に設ける必要があるため、炊飯器本体の構造そのものの変更、すなわち、成形金型の変更を伴うため、製作コストに影響する問題がある。また、要絶縁部品と炊飯器本体以外との間の絶縁を図る場合には採用できない構造である問題もある。
【０００７】
要絶縁部品を絶縁する簡便な手段として、相手部品との間に絶縁シートを介在する方法や、絶縁シートを被せる方法が考えられる。この方法は、炊飯器の胴部材を上下反転させその下端の開放部を上に向けて部品を組付けたのち、絶縁シートを差し込んだり、被せたりすることにより組付けられ、その後、胴部材の開放部に底部材が取付けられる。
【０００８】
しかし、上記の絶縁シートは、部品や胴部材等に支持される部分がないため不安定であり、振動その他の影響により組付け位置がずれたり、外れたりする不都合があり、生産能率の向上を阻害する問題がある。
【０００９】
そこで、この発明は、炊飯器本体に特別な構成を付加することなく、しかも安定よく絶縁シートを組付けることができる絶縁構造を提供することを課題とする。
【００１０】
【課題を解決するための手段】
上記の課題を解決するために、この発明は、胴部材の内部に炊飯部、制御基板、コードリール等を収納し、上記胴部材の下部に底部材を取付けることにより炊飯器本体を構成し、上記制御基板、コードリール等の要絶縁部品に絶縁シートを被せてなる炊飯器の絶縁構造において、上記絶縁シートを要絶縁部品の両面に沿う対向したシート部と、要絶縁部品の底面に沿って上記両シート部の下端相互間を連結する襠部とにより形成した構成を採用した。
【００１１】
上記の構成によると、炊飯器本体には絶縁シートを支持する部分を設ける必要がなく、また、絶縁シートは、襠（まち）部があるため、安定よく要絶縁部品の上に載り、位置ずれしたり外れたりする不都合がない。
【００１２】
また、上記の要絶縁部品がコードリールであり、該コードリールの底部に設けられた底部材差込み用の突片に嵌合する穴を上記絶縁シートの襠部に設け、該襠部を該コードリールの底部に被せると同時に上記穴に前記底部材差込み用の突片を嵌合する構成を採ることができる。この場合は、絶縁シートが襠部の存在により安定性が良好であるだけでなく、その襠部に設けた穴にコードリールの突片を嵌合することにより一層安定する。
【００１３】
また、上記絶縁シートの対向した両シート部のうち、該コードリールの一側面から突き出した充電部をカバーする方のシート部に上記襠部に沿った切込みを設け、その切込みの終端部において該切込みと直角方向に屈曲段差部を設けることによりその屈曲段差部分だけ外方に離れたカバーシート部を設け、そのカバーシート部により前記充電部をカバーした構成を採ることもできる。この構成によると、コードリールの充電部が突き出していても、その突き出し量に応じてカバーシート部が無理なく変形して充電部をカバーすることができる。
【００１４】
また、上記カバーシート部を設けたシート部と反対側のシート部の上端縁を、コードリールとコードリール収納部内面に設けたリブとの間で挟持させた構成を採用することもできる。この構成によると、シート部の保持が一層確実となる。
【００１５】
また、上記の要絶縁部品が制御基板であり、該制御基板が前記胴部材の内面に設けた下面開放の収納ポケットに差し込んで取付けられ、該制御基板の上端部の両面を挟持する対向一対の挟持リブを該ポケット上端部に設け、該制御基板のプリント配線側の面に接する一方の挟持リブと該プリント配線側の面との間で、前記絶縁シートの一方のシート部の上端縁を挟持させた構成を採ることができる。
【００１６】
この場合も、炊飯器本体には絶縁シートを支持する部分を設ける必要がなく、また、絶縁シートは、襠部があるため、安定よく要絶縁部品である制御基板上に載り、位置ずれしたり外れたりする不都合がない。さらに、絶縁シートの一方のシートが挟持リブと該プリント配線側の面との間に差し込まれるため一層安定性が良好である。
【００１７】
【発明の実施の形態】
以下、添付図面に基づいてこの発明の実施形態を説明する。図１に示した炊飯器は、炊飯器本体１と、これに対しヒンジ軸２により開閉自在に取付けられた蓋３を有する。炊飯器本体１の両側面にＵ字形のハンドル４の両端部が取付けられる。
【００１８】
炊飯器本体１は、胴部材５及び底部材６を有し、その胴部材５は炊飯部７を支持する肩部８と、炊飯器本体１の外郭を構成する胴部９を一体成形したものである。肩部８と胴部９を別体に成形する場合もあるが、この発明では、一体成形したもの、或いは別体に成形したものいずれも、胴部材と総称する。上記の炊飯部７の底部にヒーター１１を内蔵した加熱板１２が設けられ、その炊飯部７に炊飯鍋１４が出し入れ自在に収納される。上記の炊飯部７の後部と胴部材５の後端面５ａとの間に、該後端面５ａと平行のリール収納部１５が設けられる。
【００１９】
図２、図３（これらは、理解の便宜のために、炊飯器の上下を反転した状態、即ち組立時の状態で示す。以下、説明上、上下関係を示す必要がある場合は、図１の正立状態における上下関係を基準とする。）に示すように、コードリール１６は、扁平な金属製円形のリールケース１７に電源コードを巻き込んだものであり、その底部から電源プラグ１８が突き出している。このコードリール１６は、リールケース１７の両側面が、胴部材５の後端面５ａと平行になるよう、前記のリール収納部１５に収納される。
【００２０】
上記のリールケース１７の中心ボス部１９に一対の電源端子２１、２１が突き出して設けられ、その電源端子２１、２１に図示省略の電源リード線が接続される。また、リールケース１７の外周面の２箇所、即ち、両側面と、底面にそれぞれ突片２２、２３、２４が設けられる。電源プラグ１８が突き出した方向に突き出した突片２２がリール収納部１５の壁面に設けたスリット２５に挿入され、またその反対方向に突き出した突片２３が、同じくリール収納部１５の他方の壁面に設けたスリット２６に挿入され（図４参照）、それぞれ前後方向の位置決めを行う。底面の突片２４は、後述のように、底部材６の穴２７に差し込まれ、上下方向の位置決めを行う。また、コードリール１６はリール収納部１５内に設けられた複数の位置決めリブ２８、２８’により前後方向から支持される（図４（ｂ）、図５参照）。
【００２１】
上記のコードリール１６は、充電部である電源端子２１、２１が胴部材５の後端面５ａに接近しているため、絶縁及び発火防止の規格を満たすべく、その間に絶縁シート３１が介在される。この絶縁シート３１は、絶縁性及び難燃性を備えた厚さ０．１ｍｍの合成樹脂シート（例、ＰＥＴ　ＶＴＭ−２）が用いられ、図６（ａ）（ｂ）に示すように、全体としてコの字形に屈曲され、相互に対向する外側シート部３３と内側シート部３４の下端相互間が一定幅の襠部３２により連結された構造をなす。外側シート部３３は、コードリール１６の電源端子２１、２１が突き出した面と、胴部材５の後端面５ａとの間に介在される部分であり、内側シート部３４はその反対側に介在される部分であり、図６（ｂ）に示すように、内側シート部３４はコードリール１６の径より若干短く形成され（図４参照）、また、外側シート部３３は内側シート部３４より若干長く形成される。
【００２２】
上記の襠部３２の外側シート部３３側の屈曲部分に長穴３５が設けられ、コードリール１６の突片２４がこれに挿通される（図４、図５参照）。また、外側シート部３３の襠部３２に沿った部分に、該襠部３２と平行の切込み３６を外側シート部３３の一側辺からその中程まで設ける。その切込み３６の終端部で該切込み３６に対し直角方向の屈曲段差部３７を設け、その屈曲段差部３７の立ちあがり分だけ外方に離れたカバーシート部３３ａが形成される。また、そのカバーシート部３３ａの上端辺（図６では下端辺に示しているが、前述のように図１の正立状態を基準にすれば上端辺）にＶ字形の切込み３８を設けている。さらに、該カバーシート部３３ａの側辺に突片３９を設けている。
【００２３】
上記の絶縁シート３１を組付ける要領は、図４に示すように、コードリール１６をその収納部１５に組み込む前に、該絶縁シート３１をコードリール１６に被せる。この場合、襠部３２をコードリール１６の底面に沿わせるとともに、内側シート部３４をコードリール１６の内面側に被せ、外側シート部を電源端子２１が突き出した外面側に被せる（図３参照）。この場合、外側シート部３３の屈曲段差部３７から外方に離れたカバーシート部３３ａが電源端子２１をカバーする（図５参照）。
【００２４】
絶縁シート３１を上記のようにコードリール１６に被せたのち、これをコードリール収納部１５に組込む。コードリール１６は、その突片２２、２３がスリット２５、２６に嵌合して位置決めされると同時に、内側シート部３４の上端部がコードリール１６の内面と位置決めリブ２８との間で挟持される。また、カバーシート部３３ａのＶ字形の切込み３８が位置決めリブ２８’に嵌合される。
【００２５】
なお、コードリール１６のもう一つの突片２４は、後述のように、底部材６を胴部材５に取付ける際にその穴２７（図１参照）に差し込まれる。
【００２６】
一方、胴部材５の前端部内面に、下面開放の収納ポケット４１が設けられ、これに制御基板４２が収納される。収納ポケット４１は、図７及び図８に示すように、胴部材５の内側において、炊飯部７に沿って設けられた垂下壁４３と、その両側部において外向きに屈曲された大略三角形の側壁４４、４４を有する。各側壁４４の内側に傾斜リブ４５が設けられる。その傾斜リブ４５の途中にこれを横断するコの字形の切込み４６（図８（ａ）参照）によって区画され、該傾斜リブ４５よりも垂下壁４３側に突き出した部分が自由端となる爪片４７が設けられる。この爪片４７に先端側が低い傾斜突起４８（図８（ｄ）参照）が形成される。また、上記の切込み４６に隣接して、傾斜リブ４５の内側面に小突起４９が設けられる。さらに、上記収納ポケット４１の奥所、即ち上端部内面に、制御基板４２の幅をおいて対向した挟持リブ５１、５１’が左右方向に３対設けられる（図７参照）。
【００２７】
制御基板４２は、図７に示すように、垂下壁４３に沿って下方から差し込まれ、その先端部を挟持リブ５１，５１’間に差し込んだのち、図８（ａ）の矢印ａで示したように、傾斜リブ４５側に倒す。その際、爪片４７の傾斜突起４８に乗り上げ、爪片４７を弾性変形させて乗り越える。これと当時に、制御基板４２の両側辺に設けられた切欠き５２が小突起４９に嵌合される。これにより、制御基板４２は、傾斜リブ４５に押し当てられるとともに、下方への抜け出しが防止され、収納ポケット４１内で支持される（図８（ｃ）（ｄ）参照）。
【００２８】
上記の制御基板４２に被せられる絶縁シート３１’は、前述の場合と同様の絶縁性と難燃性のある合成樹脂シートが用いられ、図９に示すように、コの字形に屈曲して、外側シート部３３’と内側シート部３４’を形成するとともに、その上端相互間を襠部３２’で連結したものである。内側シート部３４’は制御基板４２とほぼ同一の大きさに形成されるが、外側シート部３３’はその半分弱程度の大きさである。
【００２９】
上記の絶縁シート３１’は、制御基板４２の下端辺に襠部３２’を沿わせ、また、内側シート部３４’を制御基板４２のプリント配線面に被せる。外側シート部３３’は制御基板４２の部品搭載面の一部に被せる。このように絶縁シート３１’を制御基板４２に被せた状態で、該制御基板４２を収納ポケット４１に組付けると、絶縁シート３１’の内側シート部３４’の先端部が制御基板４２と挟持リブ５１間で挟持される。
【００３０】
上記のように、制御基板４２に絶縁シート３１’を被せたのち、これを収納ポケット４１内に組付けるようにしてもよいが、先に制御基板４２を組付けたのちに絶縁シート３１’を被せ、内側シート部３４’の先端部を制御基板４２と挟持リブ５１間に差し込むようにしてもよい。
【００３１】
上記の各絶縁シート３１、３１’は、製造工程においては、炊飯器本体１を上下反転し胴部材５の下端開放面を上向きにして組付けられた状態で次工程に送られる間に、外部からの振動等を受けるが、襠部３２、３２’の存在により、安定性がよい。さらに、挟持リブ２８、５１等で挟持したり、絶縁シート３１の場合は、これに設けた穴３５にコードリール１６の突片２４を差し込んだりすることにより一層安定性が増し、外れたり、位置ずれしたりすることがない。
【００３２】
以上のようにして、コードリール１６と制御基板４２に、それぞれ絶縁シート３１、３１’を被せたのちに、底部材６（図２参照）を胴部材５の開放面に被せ、前述のようにコードリール１６の突片２４を底部材６の穴２７に差し込むとともに、電源プラグ１８を底部材６のプラグ穴５３に通す。そのうえで、底部材６を胴部材５に固定する。
【００３３】
底部材６を固定した状態で、コードリール１６に被せられた絶縁シート３１は、図１に示すように、その襠部３２の一部が底部材６の一部に当たることにより、下方への位置ずれが防止される。また、制御基板４２に被せられた絶縁シート３１’もその襠部３２’の一部が底部材６のリブ５４に支持され、下方への位置ずれが防止される。
【００３４】
【発明の効果】
以上のように、この発明は、炊飯器の組付けられるコードリールや制御基板等の要絶縁部品に被せる絶縁シートとして、襠部を有するものを使用したので、製造工程において、安定よく支持される。また、コードリールに被せられる絶縁シートにおいては、これに設けた穴にコードリールの突片を嵌合することにより、一層安定性が増す。さらに、襠部に沿った切込みと屈曲段差部で囲まれたカバーシート部を設けることにより、コードリールの面から突き出した電源端子等の充電部を無理なくカバーすることができる。
【００３５】
また、制御基板用の絶縁シートにおいて、そのシート部の先端を該制御基板と挟持リブとの間で挟持するようにしたので、この場合も安定よく支持することができる。
【図面の簡単な説明】
【図１】実施形態の断面図
【図２】同上の分解斜視図
【図３】（ａ）同上の一部斜視図
（ｂ）同上の一部断面図
【図４】同上の一部分解斜視図
【図５】同上の一部平面図
【図６】（ａ）同上の絶縁シートの斜視図
（ｂ）同上の絶縁シートの側面図
【図７】同上の収納ポケット部分の分解斜視図
【図８】（ａ）同上の収納ポケット部分の断面図
（ｂ）（ａ）図のｂ−ｂ線の断面図
（ｃ）（ａ）図のｃ−ｃ線の断面図
（ｄ）（ａ）図のｄ−ｄ線の断面図
【図９】（ａ）絶縁シートの他の例の斜視図
（ｂ）（ａ）図の側面図
【符号の説明】
１　炊飯器本体
２　ヒンジ軸
３　蓋
４　ハンドル
５　胴部材
５ａ　後端面
６　底部材
７　炊飯部
８　肩部
９　胴部
１１　ヒーター
１２　加熱板
１４　炊飯鍋
１５　リール収納部
１６　コードリール
１７　リールケース
１８　電源プラグ
１９　中心ボス部
２１　電源端子
２２　突片
２３　突片
２４　突片
２５　スリット
２６　スリット
２７　穴
２８、２８’　位置決めリブ
３１　絶縁シート
３２、３２’　襠部
３３、３３’　外側シート部
３３ａ　カバーシート部
３４、３４’　内側シート部
３５　長穴
３６　切込み
３７　屈曲段差部
３８　切込み
３９　突片
４１　収納ポケット
４２　制御基板
４３　垂下壁
４４　側壁
４５　傾斜リブ
４６　切込み
４７　爪片
４８　傾斜面
４９　小突起
５１，５１’　挟持リブ
５２　切欠き
５３　プラグ穴
５４　リブ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an insulating structure of a rice cooker (including a rice cooker), and more particularly to a structure of an insulating sheet to be placed on an insulated component.
[0002]
[Prior art]
In general, a rice cooker stores a rice cooker, a control board, a code reel, and the like inside a body member, forms a rice cooker body by attaching a bottom member to a lower portion of the body member, and covers the rice cooker body with a lid. It is configured to be openable and closable. Of these, the printed wiring portion, which is a charging portion, is exposed to the outside on the control board, and the AC power supply connection terminal provided at the center of one surface of the code reel is exposed to the outside. Both the printed wiring portion and the power supply terminal exposed to the outside are charging portions.
[0003]
As described above, in order to maintain a sufficient insulation distance between the charging unit and other components, measures are generally taken to keep a predetermined distance or to interpose an insulator. Such measures are important not only to ensure electrical insulation, but also to avoid the risk of fire due to the insulation being destroyed for any reason.
[0004]
On the other hand, due to the demand for miniaturization of rice cookers, the spacing between insulated parts and other parts tends to be designed to be smaller and smaller, and there is a need for an insulating structure suitable for the demand for miniaturization. .
[0005]
JP-A-2001-352183 discloses an insulating structure that satisfies such a demand, in which a pair of left and right guide pieces are provided on the inner surface of the rice cooker body close to the required insulating parts mounted inside the rice cooker body. A structure in which an insulating sheet is inserted between the guide pieces is disclosed.
[0006]
[Problem to be solved]
However, since the above-mentioned insulating structure requires a pair of guide pieces to be provided on the rice cooker main body in order to attach the insulating sheet, the structure itself of the rice cooker main body is changed, that is, the molding die is changed. There are issues that affect costs. In addition, there is a problem that the structure cannot be adopted when insulating between the insulated parts and a part other than the rice cooker main body.
[0007]
As a simple means for insulating the insulated component, a method of interposing an insulating sheet between the component and a mating component or a method of covering the insulating sheet with the mating component can be considered. In this method, the body member of the rice cooker is turned upside down, and after assembling the parts with the opening at the lower end thereof facing upward, inserting or covering the insulating sheet, and thereafter assembling the body member, A bottom member is attached to the opening.
[0008]
However, the above-mentioned insulating sheet is unstable because there is no part supported by the parts, the body member, and the like, and there is a disadvantage that the mounting position is shifted or deviated due to vibration or other influences, thereby improving the production efficiency. There is a problem of inhibition.
[0009]
Therefore, an object of the present invention is to provide an insulating structure that can stably mount an insulating sheet without adding a special configuration to a rice cooker main body.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention comprises a rice cooker main body in which a rice cooker, a control board, a code reel, and the like are stored inside a body member, and a bottom member is attached to a lower portion of the body member. In the insulating structure of a rice cooker in which an insulating sheet is placed on an insulative component such as the control board and the code reel, the insulative sheet is disposed along the opposite sheet portions along both surfaces of the insulative component and along the bottom surface of the insulated component. A configuration formed by a gore portion connecting the lower ends of the two sheet portions to each other is adopted.
[0011]
According to the above configuration, there is no need to provide a portion for supporting the insulating sheet in the rice cooker main body, and since the insulating sheet has a gore (town) portion, it can be stably placed on the required insulating parts and displaced. There is no inconvenience to drop or slip.
[0012]
The above-mentioned insulated component is a cord reel, and a hole is provided in the gore portion of the insulating sheet for fitting into a projection for inserting a bottom member provided at the bottom of the cord reel. It is possible to adopt a configuration in which the protruding piece for inserting the bottom member is fitted into the hole at the same time as covering the bottom of the reel. In this case, the stability of the insulating sheet is not only good due to the presence of the gore portion, but is further stabilized by fitting the projecting piece of the code reel into a hole provided in the gore portion.
[0013]
In addition, a cut along the gore portion is provided in a portion of the opposite sheet portion of the insulating sheet that covers the charging portion protruding from one side of the cord reel, and a cut end is provided at the end of the cut. It is also possible to adopt a configuration in which by providing a bent step portion in a direction perpendicular to the cut, a cover sheet portion that is separated outward by the bent step portion is provided, and the charged portion is covered by the cover sheet portion. According to this configuration, even if the charging portion of the code reel protrudes, the cover sheet portion can be easily deformed to cover the charging portion according to the amount of protrusion.
[0014]
Further, a configuration in which the upper edge of the sheet portion opposite to the sheet portion provided with the cover sheet portion is sandwiched between a code reel and a rib provided on the inner surface of the code reel storage portion may be employed. According to this configuration, the holding of the seat portion is further ensured.
[0015]
Further, the above-mentioned insulated component is a control board, and the control board is attached by being inserted into a storage pocket having an open lower surface provided on the inner surface of the body member, and a pair of opposing pairs sandwiching both surfaces of an upper end portion of the control board. A holding rib is provided at an upper end portion of the pocket, and an upper edge of one sheet portion of the insulating sheet is held between one holding rib in contact with a printed wiring side surface of the control board and the printed wiring side surface. It is possible to adopt a configuration that has been performed.
[0016]
Also in this case, it is not necessary to provide a portion for supporting the insulating sheet in the rice cooker main body, and since the insulating sheet has a gore portion, it can be stably placed on the control board, which is an insulated necessary component, and displaced. There is no inconvenience to come off. Further, one of the insulating sheets is inserted between the holding rib and the surface on the printed wiring side, so that the stability is further improved.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The rice cooker shown in FIG. 1 has a rice cooker main body 1 and a lid 3 attached to the rice cooker main body 1 so as to be freely opened and closed by a hinge shaft 2. Both ends of a U-shaped handle 4 are attached to both side surfaces of the rice cooker main body 1.
[0018]
The rice cooker main body 1 has a body member 5 and a bottom member 6, and the body member 5 is formed by integrally molding a shoulder 8 supporting a rice cooker 7 and a body 9 forming an outer shell of the rice cooker main body 1. It is. In some cases, the shoulder 8 and the body 9 may be formed separately, but in the present invention, both the integrally formed body and the body formed separately are collectively referred to as a body member. A heating plate 12 having a built-in heater 11 is provided at the bottom of the rice cooker 7, and a rice cooker 14 is housed in the rice cooker 7 so as to be freely taken in and out. Between the rear part of the rice cooker 7 and the rear end face 5a of the body member 5, a reel storage part 15 parallel to the rear end face 5a is provided.
[0019]
2 and 3 (these are shown in a state where the rice cooker is turned upside down for convenience of understanding, that is, a state at the time of assembly. Hereinafter, for the sake of explanation, when it is necessary to show the vertical relationship, FIG. As shown in FIG. 2, the cord reel 16 is formed by winding a power cord around a flat metal circular reel case 17, and a power plug 18 protrudes from the bottom of the reel case 17. ing. The code reel 16 is housed in the reel housing 15 so that both side surfaces of the reel case 17 are parallel to the rear end surface 5a of the body member 5.
[0020]
A pair of power terminals 21, 21 protrude from the center boss 19 of the reel case 17, and a power lead (not shown) is connected to the power terminals 21, 21. Also, protrusions 22, 23, and 24 are provided at two locations on the outer peripheral surface of the reel case 17, that is, on both side surfaces and the bottom surface. A protruding piece 22 protruding in the direction in which the power plug 18 protrudes is inserted into a slit 25 provided on the wall surface of the reel storage unit 15, and a protruding piece 23 protruding in the opposite direction is also inserted into the other wall surface of the reel storage unit 15. (See FIG. 4) for positioning in the front-rear direction. The protruding piece 24 on the bottom surface is inserted into a hole 27 of the bottom member 6 to perform vertical positioning as described later. Further, the code reel 16 is supported from the front-rear direction by a plurality of positioning ribs 28, 28 'provided in the reel storage section 15 (see FIGS. 4B and 5).
[0021]
In the above-mentioned cord reel 16, since the power supply terminals 21, 21 which are charging portions, are close to the rear end face 5 a of the body member 5, the insulating sheet 31 is interposed between them in order to satisfy the standards of insulation and fire prevention. . As the insulating sheet 31, a 0.1 mm thick synthetic resin sheet (eg, PET VTM-2) having insulating properties and flame retardancy is used. As shown in FIGS. The lower end of the outer sheet portion 33 and the lower end of the inner sheet portion 34 facing each other are connected by a gore portion 32 having a constant width. The outer seat portion 33 is a portion interposed between a surface of the cord reel 16 from which the power terminals 21 and 21 protrude and the rear end surface 5a of the body member 5, and the inner seat portion 34 is interposed on the opposite side. As shown in FIG. 6B, the inner sheet portion 34 is formed slightly shorter than the diameter of the cord reel 16 (see FIG. 4), and the outer sheet portion 33 is slightly longer than the inner sheet portion 34. It is formed.
[0022]
An elongated hole 35 is provided in the bent portion of the gore portion 32 on the side of the outer sheet portion 33, and the projecting piece 24 of the cord reel 16 is inserted therethrough (see FIGS. 4 and 5). Further, a cut 36 parallel to the gore portion 32 is provided in a portion of the outer sheet portion 33 along the gore portion 32 from one side of the outer sheet portion 33 to the middle thereof. A bent step portion 37 is provided at the end of the cut 36 in a direction perpendicular to the cut 36, and a cover sheet portion 33a which is separated outward by the rising of the bent step portion 37 is formed. Further, a V-shaped cut 38 is provided at the upper end side of the cover sheet portion 33a (the lower end side in FIG. 6, but as described above, the upper end side based on the erect state of FIG. 1). . Further, a protruding piece 39 is provided on a side of the cover sheet portion 33a.
[0023]
As shown in FIG. 4, the manner in which the insulating sheet 31 is assembled is that the insulating sheet 31 is covered on the code reel 16 before the code reel 16 is assembled into the storage section 15. In this case, the gore portion 32 extends along the bottom surface of the code reel 16, the inner sheet portion 34 covers the inner surface side of the code reel 16, and the outer sheet portion covers the outer surface side from which the power terminal 21 protrudes (see FIG. 3). . In this case, the cover sheet portion 33a that is separated outward from the bent step portion 37 of the outer sheet portion 33 covers the power supply terminal 21 (see FIG. 5).
[0024]
After covering the code reel 16 with the insulating sheet 31 as described above, this is assembled into the code reel storage unit 15. The code reel 16 is positioned by fitting the protruding pieces 22 and 23 into the slits 25 and 26, and at the same time, the upper end of the inner sheet portion 34 is sandwiched between the inner surface of the code reel 16 and the positioning rib 28. You. Further, the V-shaped cut 38 of the cover sheet portion 33a is fitted to the positioning rib 28 '.
[0025]
The other projecting piece 24 of the code reel 16 is inserted into a hole 27 (see FIG. 1) when the bottom member 6 is attached to the body member 5 as described later.
[0026]
On the other hand, a storage pocket 41 with an open lower surface is provided on the inner surface of the front end of the body member 5, and the control board 42 is stored in the storage pocket 41. As shown in FIGS. 7 and 8, the storage pocket 41 has a hanging wall 43 provided along the rice cooker 7 on the inside of the body member 5 and a generally triangular side wall outwardly bent on both sides thereof. 44, 44. An inclined rib 45 is provided inside each side wall 44. The U-shaped notch 46 (see FIG. 8 (a)) crossing the inclined rib 45 in the middle thereof, and a portion protruding from the inclined rib 45 toward the hanging wall 43 becomes a free end. 47 are provided. An inclined projection 48 (see FIG. 8D) having a lower tip end is formed on the claw piece 47. A small projection 49 is provided on the inner surface of the inclined rib 45 adjacent to the cut 46. Further, three pairs of sandwiching ribs 51 and 51 ′ are provided in the left and right direction at the depth of the storage pocket 41, that is, on the inner surface of the upper end portion with the width of the control board 42 being opposed (see FIG. 7).
[0027]
As shown in FIG. 7, the control board 42 is inserted from below along the hanging wall 43, and after its tip is inserted between the sandwiching ribs 51 and 51 ′, it is indicated by an arrow a in FIG. 8A. To the inclined rib 45 side. At this time, the claw 47 rides on the inclined protrusion 48 and elastically deforms the claw 47 to get over. At this time, the notches 52 provided on both sides of the control board 42 are fitted into the small projections 49. As a result, the control board 42 is pressed against the inclined rib 45, is prevented from falling down, and is supported in the storage pocket 41 (see FIGS. 8C and 8D).
[0028]
As the insulating sheet 31 'to be covered on the control board 42, the same insulating and flame-retardant synthetic resin sheet as in the above-described case is used, and as shown in FIG. The outer sheet portion 33 'and the inner sheet portion 34' are formed, and the upper ends thereof are connected by a gore portion 32 '. The inner sheet portion 34 'is formed to be substantially the same size as the control board 42, but the outer sheet portion 33' is slightly less than half the size.
[0029]
The insulating sheet 31 ′ has the gore portion 32 ′ along the lower edge of the control board 42 and covers the inner sheet portion 34 ′ on the printed wiring surface of the control board 42. The outer sheet portion 33 'covers a part of the component mounting surface of the control board 42. When the control board 42 is attached to the storage pocket 41 with the insulating sheet 31 ′ covered on the control board 42 in this manner, the tip of the inner sheet portion 34 ′ of the insulating sheet 31 ′ is 51.
[0030]
As described above, after covering the control board 42 with the insulating sheet 31 ′, it may be assembled in the storage pocket 41. However, after the control board 42 is assembled first, the insulating sheet 31 ′ is attached. The top end of the inner sheet portion 34 ′ may be inserted between the control board 42 and the holding rib 51.
[0031]
In the manufacturing process, the above-mentioned insulating sheets 31 and 31 ′ are externally turned upside down while being sent to the next process in a state where the rice cooker main body 1 is turned upside down and the lower end opening surface of the body member 5 is installed upward. However, stability is good due to the presence of the gores 32 and 32 '. Further, the stability is further increased by sandwiching between the holding ribs 28 and 51, and in the case of the insulating sheet 31, by inserting the protruding piece 24 of the cord reel 16 into the hole 35 provided in the insulating sheet 31, so that the detachment and the position can be achieved. It does not shift.
[0032]
After covering the code reel 16 and the control board 42 with the insulating sheets 31 and 31 ', respectively, as described above, the bottom member 6 (see FIG. 2) is placed on the open surface of the body member 5 as described above. The projecting piece 24 of the cord reel 16 is inserted into the hole 27 of the bottom member 6, and the power plug 18 is passed through the plug hole 53 of the bottom member 6. Then, the bottom member 6 is fixed to the body member 5.
[0033]
In a state where the bottom member 6 is fixed, the insulating sheet 31 covered on the code reel 16 is positioned downward by a part of the gore portion 32 hitting a part of the bottom member 6 as shown in FIG. Displacement is prevented. Also, a part of the gore portion 32 'of the insulating sheet 31' covered on the control board 42 is supported by the rib 54 of the bottom member 6, thereby preventing downward displacement.
[0034]
【The invention's effect】
As described above, the present invention uses a material having a gore as an insulating sheet to be placed on insulative components such as a cord reel and a control board to which a rice cooker is assembled, so that it is stably supported in a manufacturing process. . Further, in the case of the insulating sheet covered on the code reel, the stability is further increased by fitting the projecting piece of the code reel into a hole provided in the insulating sheet. Further, by providing the cover sheet portion surrounded by the cut along the gore portion and the bent step portion, a charged portion such as a power terminal protruding from the surface of the cord reel can be covered without difficulty.
[0035]
Further, in the insulating sheet for the control board, the front end of the sheet portion is sandwiched between the control board and the sandwiching rib, so that the support can be stably supported also in this case.
[Brief description of the drawings]
FIG. 1 is a sectional view of an embodiment; FIG. 2 is an exploded perspective view of the same; FIG. 3 (a) is a partial perspective view of the same; FIG. FIG. 5 is a partial plan view of the same; FIG. 6A is a perspective view of the same insulating sheet; FIG. 6B is a side view of the same insulating sheet; FIG. (A) A sectional view of the storage pocket portion of the above (b) A sectional view taken along line bb of (a) (c) A sectional view taken along line cc of (a) FIG. FIG. 9 (a) is a perspective view of another example of the insulating sheet, and FIG. 9 (b) is a side view of FIG. 9 (a).
DESCRIPTION OF SYMBOLS 1 Rice cooker main body 2 Hinge axis 3 Lid 4 Handle 5 Body member 5a Rear end face 6 Bottom member 7 Rice cooker 8 Shoulder part 9 Body 11 Heater 12 Heating plate 14 Rice cooker 15 Reel storage part 16 Code reel 17 Reel case 18 Power plug 19 Center Boss 21 Power Terminal 22 Protrusion 23 Protrusion 24 Protrusion 25 Slit 26 Slit 27 Hole 28, 28 'Positioning Rib 31 Insulating Sheet 32, 32' Gore 33, 33 'Outer Seat 33a Cover Sheet 34, 34 'inner sheet portion 35 long hole 36 cut 37 bent step 38 cut 39 protrusion 41 storage pocket 42 control board 43 hanging wall 44 side wall 45 inclined rib 46 cut 47 claw piece 48 inclined surface 49 small protrusion 51, 51' clamping rib 52 Notch 53 Plug hole 54 Rib

Claims

A rice cooker, a control board, a code reel, and the like are housed inside the body member, and a rice cooker body is formed by attaching a bottom member to a lower portion of the body member, and is insulated from the control board, the code reel, and other necessary insulating parts. In an insulating structure of a rice cooker in which a sheet is covered, a gore portion that connects between the lower ends of the two sheet portions along the bottom surface of the insulative component and an opposing sheet portion along the both surfaces of the insulative component. And an insulating structure for the rice cooker.

The above-mentioned insulated component is a code reel, and a hole is provided in the gore portion of the insulating sheet for fitting with a bottom member insertion protrusion provided on the bottom of the code reel, and the gore portion of the code reel is provided. The insulating structure of a rice cooker according to claim 1, wherein the protrusion for inserting the bottom member is fitted into the hole at the same time as covering the bottom.

A cut along the gore portion is provided in a portion of the opposite sheet portion of the insulating sheet that covers the charging portion protruding from one side of the cord reel, and the cut is formed at the end of the cut. 3. The rice cooker according to claim 2, wherein a cover sheet portion that is separated outward by only the bent step portion is formed by providing a bent step portion in a right angle direction, and the charged portion is covered by the cover sheet portion. Container insulation structure.

4. The method according to claim 3, wherein an upper edge of the sheet portion opposite to the sheet portion provided with the cover sheet portion is sandwiched between a code reel and a rib provided on an inner surface of the code reel storage portion. Rice cooker insulation structure.

The above-mentioned insulating component is a control board, and the control board is inserted and attached to a storage pocket having an open bottom provided on the inner surface of the body member, and a pair of opposing holding ribs for holding both sides of an upper end portion of the control board. Was provided at the upper end of the pocket, and the upper edge of one sheet portion of the insulating sheet was sandwiched between one of the sandwiching ribs in contact with the printed wiring side surface of the control board and the printed wiring side surface. The insulating structure of a rice cooker according to claim 1, wherein