1359934 九、發明說明 【發明所屬之技術領域】 本發明係關於具備有自動開放門裝置之電冰箱。 【先前技術】 近年，家庭用電冰箱係具有下述傾向，即使飲食生活 的多樣化，並且收納量也大容量化，超過400公升等級成 爲主流，電冰箱本體的高度、寬度尺寸也變大的傾向。伴 隨此，冷藏室、及冷凍室、蔬菜室的門也大型化，旋轉式 冷藏室門的內側之收納架、抽屜式冷凍室、蔬果室門等具 有高度與寬度尺寸的擴大並且深度尺寸也增大用以收納更 多的食品之傾向，門本身也大，故爲了開門而需要大的力 量，對於力量小的女性、老年者的情況，其負擔變大，被 要求加以改善。 針對前述冷藏室，由於收納容積最大，採取將門分割 成左右以作成爲雙門方式，或具備藉由使用者對電冰箱門 表面之觸控操作，使開關作動，用以驅動螺線管使推壓棒 從本體側突出，藉此按壓門面而開門之自動開放門機構的 電冰箱提供於市場中，作爲門的開放不需要負擔的商品被 加以評價並且在前述雙門式門適用此自動開放門裝置之結 構被提案出來（例如參照專利文獻1 )。 前述專利文獻1所記載的冷藏室用的開放門裝置，由 於門爲被安裝於本體之鉸鏈所樞支的旋轉門，故，藉由調 整從作爲旋轉始點支鉸鏈部分的按壓位置與推出力，能夠 -5- 1359934 進行開門，但，針對前述冷凍室、蔬果室等的抽屜式門， 爲了使開門的方向非旋轉而是在直線方向並推出行程變長 ，或爲了關門所壓入的反動再次開門，也能以自力關門， 而在抽屜軌道設置朝背面下方之傾斜部，或設置以彈簧拉 入之機構。 因此，如前述般，爲了藉由螺線管的產生力，能自動 地開門，而如前述旋轉式門之開放門裝置，需要對應於複 數個負荷之峰値而超過該峰値的開門力，其不僅勝過對拉 開對磁鐵墊片的吸附力，也需勝過拉入用彈簧的自閉力等 ，但，在以往的螺線管，由於可獲得大產生力之點係對移 位呈一點，故，爲了克服具有在複數個分離位置的峰値之 門負荷，不需使用具有極大產生力之螺線管。 〔專利文獻1〕日本特開2 0 0 3 — 8 3 6 7 3號公報 【發明內容】 〔發明所欲解決之課題〕 如前述，在螺線管具備極大的產生力之情況，由於螺 線管本身的構造尺寸變大，造成不易設置於電冰箱，並且 由於產生力極大，故，開放門時的開門速度變得過快，由 於成爲強力地將門打開，會產生對使用者產生衝擊之缺失 。又，在價格上，由於線圈的捲裝變多，會產生成爲昂貴 之問題。 又，作爲開放門裝置，亦可考量不使用螺線管而作成 爲馬達式結構，但因馬達式，開門速度慢，且推開門的力 -6- 1359934 量弱’所以’比起螺線管方式，對應性、開門感覺差。 本發明係著眼於上述問題點而開發完成的發明，其目 • 的在於提供，設有可將螺線管小型化而使用於電冰箱，並 在成本上也廉價的的開放門裝置之電冰箱。 〔用以解決課題之手段〕 爲了解決上述課題，本發明的電冰箱，其特徵爲：具 Φ 備有：封閉儲藏室的前面開口部之門；藉由對此門的操作 來作動之開關；和設置於與前述門的裏面相對向之本體側 ，藉由前述開關的作動來進行開門動作之開放門單元，前 述開放門單元是藉由對在管的外周捲裝有線圈之螺線管進 行通電所吸引，將設置於在前述管內朝軸方向移動的柱塞 之前端的推壓棒朝前方突出，來進行開門動作之單元，並 在對前述柱塞的移動距離之前述螺線管的產生力特性上， 具有兩部位以上的峰値。 〔發明效果〕 若根據本發明的電冰箱的話，因使作爲開放門裝置之 螺線管的產生力具有複數個峰値，所以，能夠產生因應因 開門時的位移所產生的負荷之產生力，藉由無浪費、有效 率的開門力，進行舒適的自動開放，並且可將螺線管小型 化而容易使用於電冰箱，且，可廉價製造。 【實施方式】 1359934 以下，根據圖面，說明關於本發明的1實施形態。圖 1係顯示本發明之電冰箱之最下段的冷凍室部分的開門狀 態的外觀之斜視圖，圖2係圖1的縱斷面圖。 ‘ 以外箱、內箱、和在這些內外箱間發泡充塡有隔熱材 的隔熱箱體所形成之電冰箱本體（1)，係在內箱內部， 作爲儲藏空間，於最上部具冷藏室（2)，而在其下方， 經由隔熱區隔壁，將製冰貯冰室（3 )與溫度切換室（4 ) 區分成左右而倂置。蔬果室，雖未特別予以圖示，其配設 於前述冷藏室（2)的下方空間。又，在最下部，獨立配 置有冷凍室（5)，在各儲藏室的前面開口，分別設有專 用的門而可自由開閉地封閉著。 具有最大收納容積之冷藏室（2)的開口部爲左右旋 轉式門，藉由作成爲雙門式的門與安裝於門周緣之磁鐵墊 片，將內外予以氣密地封閉著，具備有藉由使用者對門表 面之觸控操作來驅動螺線管而進行開門之自動開放門機構 〇 配置於冷藏室（2 )的下部之製冰貯冰室（3 )、溫度 切換室（4)、及冷凍室（5)係與前述冷藏室（2)同樣 地，藉由安裝於門內板周緣之磁鐵墊片（6)，將內外予 以氣密地封閉著，在安裝於門內側並朝儲藏室內深部延伸 出來的左右一對支承框（7)載置有各自的收納容器（8) ’並且作成爲下述方式者，即，將冷凍室門（9)作成爲 抽屜式’藉由前述支承框（7)與庫內壁面之軌道機構， 將其分別朝庫外並向前後方向拉出的方式。 -8 - 1359934 冷凍室（5)之收納容器（8)係呈上面開口之底深的 箱狀，在該開口之上面的周緣形成有突緣部，利用此突緣 部將前述上面開口幾乎予以覆蓋，載置有切削前緣的一部 分而具有朝收納具高度之製冰用牛乳盒容器等的朝向之後 方凹陷部的底較淺的皿狀之中段容器（10)。 又，在拉出冷凍室門（9)之際，與收納容器（8) — 同，中段容器（10)係藉由配設於前述支承框（7)與庫 內壁面之間的滑軌（11)，其後端從冷凍室（5)的前面 開口部朝前方出現爲止，在全開狀態下被大幅拉出者，中 段容器（10)係設置成，在收納容器（8)的突緣部上可 朝前後方向滑動，開閉收納容器（8 )的上面開口，又能 夠進行中段容器（1〇)本身的拉出、收納。 在前述收納容器（8)及中段容器（10)的上方，設 有與這些容器（8) (10)及冷凍室門（9)的開閉無關連 地，獨立拉出、收納於庫內之上段容器（12)。此上段容 器（12)位於中段容器（1〇)的上方，但，對其的保持， 非前述門的支承框（7) ’而是直接支承於使形成於上段 容器（1 2 )本身的開口側緣之突緣部朝冷凍室（5 )的側 壁並向內突出所設置之未圖示的支承軌道，而可朝前後滑 動地被支承的構造’爲荷重負擔不會施加於支承冷凍室門 (9)及中段容器（10)與下段的收納容器（8)之支承框 (7)、滑軌（11) ’並且不會與冷凍室門（9)的開門連 動之結構。因此’在將其拉出的情況’在拉出冷凍室門（ 9)後，握持形成於上段容器（12)本身的前壁的一部分 -9- 1359934 之把手並獨自地拉出，又推入至室內。 如此，在冷凍室（5)的上部之前述製冰貯冰室（3) 與溫度切換室（4)之間的區隔壁部（13)的寬度方向中 央部，如圖3的分解斜視圖所示，設置有開放門單元（15 )。此開放門單元（15)，在本實施例的情況，非將上下 的室隔熱區劃用的區隔壁，而是配設有僅設成將收納容器 (8)及上段容器（12)從庫內拉出或收納用之區隔壁部 (13)，將本來無法作爲本来儲藏空間來利用之無效空間 能夠有效地利用來作爲開放門單元（1 5 )的收納空間者。 開放門單元（15)係與轉動式冷藏室（2)的門同樣 地，藉由對由形成於冷凍室門（9)表面的手把部（9a) 之磁性棒所構成的觸控式開關（1 6 )進行觸控操作，利用 霍爾1C、微電腦控制所驅動者，如呈關門狀態之平斷面 圖的圖4所示，由設置於軛（17)內，將線圈捲裝於繞線 管的外周並將其以樹脂加以成形之螺線管（18)、在螺線 管（1 8 )的內側爲了偏移吸引力的峰値的位置而在軸方向 的前後分離並配設之不銹鋼製前補助軛（19)與後補助軛 (20 )、設置於此前後補助軛（19 )( 20 )的內側並以黄 銅製成之圓筒狀管（21)、藉由對前述螺線管（18)進行 通電來吸引並在前述管（21)內朝軸方向水平移動之磁性 體製柱塞（22)、及固接於柱塞（22)的前端之推壓棒（ 23)所構成，將此開放門單元（15)經由橡膠襯套等的緩 衝材螺旋固定於安裝於前述區隔壁部（13)的前後範圍之 螺線管盒（24 )。 -10- 1359934 前述柱塞（22)與推壓棒（23)之組立體，在本實施 例的情況’由於設置於冷凍溫度空間內’故會有在開門時 等，因外氣的侵入而結露並結冰之可能性，爲了防止結冰 ，而不對功能造成影響下，該開口上面藉由螺線管蓋（25 )加以密封地封閉著。在其前端部，爲了使螺線管盒（24 )內的柱塞（22)等的金屬製滑動部氣密地密封成不會與 冷凍室（5 )空間之濕氣接觸，且，推壓棒（23 )的前端 部可朝前方延伸，而設有形成爲蛇腹狀之矽膠製密封用襯 墊（26 )，經由此密封用襯墊（26 )，安裝作爲對冷凍室 門（9 )方向之突出構件的以合成樹脂所形成之敲擊構件 (27 )。 又，在對螺線管（1 8 )進行通電時，藉由朝柱塞（22 )的前方之水平移動，使得推壓棒（23)的前端部朝前方 延伸出來，經由密封用襯墊（26)，按壓立設於敲擊構件 (27)的後部之卡合片（27a)，使敲擊構件（27)的前 端部朝冷凍室門（9 )的裏面側突出。 如此，因敲擊構件（27 )被作成爲與推壓棒（23 )不 同之構件’經由卡合片（27a )被按壓，所以，具有下述 優點，即，不需要爲了將門裏面的按壓部與柱塞（22)的 滑動軸的軸芯一致或將推壓棒（23)配置於預定位置而進 行彎曲成形，能夠進行螺線管（18)的設置場所之設定調 整’可有效地設置於區隔壁部（13)裏面的無效空間中。 在柱塞（22 )的另一端，設有由壓縮線圈彈簧所構成 之返回用彈簧（28 )，其係形成爲將柱塞（22 )朝與螺線 -11 - 1359934 管（18)之突出方向相反方向常時彈推’在停止對螺線管 (18)進行通電後，藉由此返回用彈簧（28) ’將推壓棒 (23)再次收納於螺線管（18)的管（21)內。又，包含 配設於前述螺線管盒（24)內的敲擊構件（27)之開放門 單元（15)的表面係受到單元蓋（29)所被覆，防止冷氣 的入侵、進行防止受到外力破壞的保護，並且亦進行使人 不會接觸到充電部之安全上的保護。 圖1中的（3 0 )係爲利用設置於與冷凍室門（9 )的 下方的一側裏面相對向之電冰箱本體（1 )側的振簧開關 等所形成的門開關，在關門之際，藉由感測設置於冷凍室 門（9 )裏面之磁鐵墊片（6 )的磁力，來檢測冷凍室門（ 9 )的開閉狀態者。 此門開關（30 )係並非僅藉由檢測門開閉，控制室內 的冷卻風扇的旋轉等，並且在冷凍室門（9)開放之情況 ，亦控制成不會使開放門單元（1 5 )作動。藉此，即使在 冷凍室門（9 )開放中不小心觸控到觸控式開關（1 6 )之 際，也不會對螺線管（18)進行通電，能夠防止敲擊構件 (27)意外地朝本體前方的空間突出的危險者，開放門單 元（1 5 )係以冷凍室門（9 )被完全關閉爲條件才可進行 動作。 開放門單元（15)的基本結構是如上所述，在打開冷 凍室門（9 )之情況，藉由門開關（30 )，以冷凍室門（9 )被關閉爲條件，對進行於門的手把部（9a)之觸控式開 關（1 6 )進行觸控操作，來對螺線管（丨8 )，經由驅動器 -12- 1359934 (功率電路）通電1秒鐘。然後，藉由螺線管（18)，使 柱塞（22)抗衡返回用彈簧（28)的力來吸引移動而進行 開門動作。 再者，在冷凍室門（9)等的抽屜式門，爲了防止因 關門時的壓入不足，造成在關閉前門與本體之間產生間隙 的狀態下停止所謂半關門半門狀態，又，爲了防止其他的 門被強力地關閉之際，因該風壓造成已經關閉的門被打開 之情事產生，而以自動進行關門爲目的，設置下述機構， 即，在滑軌（11)部設置作用成將冷凍室門（9)朝關門 方向拉入之未圖不的拉入用彈簧，藉由自閉力，將半關門 狀態的門關閉或保持關狀態之機構。 因此，在打開抽屜式之冷凍室門（9)時，拉離開門 時的磁鐵墊片（6)之力、與勝過成爲前述負荷體之拉入 用彈簧的自閉力的力之兩部位的峰値作爲負荷存著，開放 門單元（1 5 )必須具備有能夠進行柱塞（22 )的位移以及 對應這些負荷來開門之產生力。 螺線管（18)對柱塞（22)的移動距離之產生力爲電 磁力，會受磁束的量所影響，若爲鐵質電路的話，則高透 磁率材且斷面積越大越強，若爲銅電路的話，捲繞多數的 線圈作成爲安培匝（電流X捲繞數）則變強。 但，前述條件均是將螺線管本身增重，尺寸也大，在 產生力的峰値僅有一點之以往的螺線管，爲了如前述般對 應具有複數個峰値之負荷，必須將該產生力設定成高於門 的位移之在所有部位的負荷，因此，必須將螺線管之產生 -13- 1359934 力作成爲極大者。 因此，造成螺線管本身進一步變大，裝置也變大，需 要用以進行設置之空間，因，該部分不僅造成用來儲藏之 空間減少，並且因產生力變大，造成開放門時的開門速度 、強度變得過大，會有在開門之際對使用者衝接之缺失產 生，又，價格也變得極爲昂貴之問題也會產生。 針對這些情事，在本發明，將螺線管（18)作成爲下 述構造，即，非在柱塞（22 )牴觸到固定子之滑動的最終 點產生最大力之吸引子型態，而是作成爲將管（21)貫通 之貫通型態，在前後設置圓筒形的前述補助軛（19) (20 )，並將前方側的前補助軛（19)的長度與形狀，來設置 對應於將冷凍室門（9)拉出之際的複數部位的負荷之峰 値的產生力。 如作爲顯示本實施例之對門的移動位移量之負荷力及 螺線管產生力的關係特性圖之圖5所示，將開門點作爲〇 ，關門點位於從開門點分離46mm之位置。 從開門動作之關門點的開門當時之門負荷係爲使設置 於門開口部之磁鐵墊片（6)抗衡因該磁力所產生對本體 側之吸附力的力，在從開門點分離3 8mm之位置產生第1 峰値（A)，產生用來進行拉離的大約30N的負荷。但， 前述負荷値爲基準値，在磁鐵墊片（6)，藉由電冰箱之 使用過程的附著物使密接度增加者，實際上成爲以虛線所 示之曲線，在前述第1峰値（A)成爲5 0N左右之負荷。 以下，針對以虛線所示之實際値進行說明。拉離磁鐵 -14- 1359934 墊片（6)後的門負荷成爲導出成冷凍室門（9)本 量與收納容器（8 )等的收納物的重量加上摩擦後 降低成20N程度之値，但，在從前述第1峰値（/ 移動距離爲20〜30mm的位置，在本實施例爲 2 7mm後之開門點分離1 1mm之位置，作爲門的自 前述拉入用彈簧的彈力成爲最大値而形成第2峰fj ，該負荷値成爲大於35N，因此需要勝過該負荷値 爲了對應於前述負荷値之變化，在本實施例， 管（18)的產生力的第1峰値（a)設定成在開門 38mm之位置成爲55N，而將第2峰値（b)在同1 點成爲4 5N。再者，前述螺線管（18)的產生力爲 85V時之値，藉由將電壓作成100V等使其改變， 大或調整產生力。 由於在螺線管的產生力特性上，設有兩部位的 故如圖6中顯示第1實施例的側面圖（a )、同斜i )所示，藉由形成在從前述前補助軛（19)的圓筒 部朝前方側向軸方向延伸於預定距離範圍並將前端 矩形狀之缺口部（31)，來使其具有兩部位的峰値 產生力的特性係如槪略關係圖之圖7所示，作 子之柱塞（22 )從如關門狀態之2點鎖線的位置如 示般滑動，當其前端邊緣（22a)與前補助軛（19 端之邊緣a(l 9a)接近時，在最接近的位置’產 的產生力的峰値者’藉由形成前述缺口部（31) ’ 缺口者雖會變低，但在前補助軛（19)的前述邊 身的重 的値， l )起之 從移動 閉力之 1(B) 之力。 將螺線 點分離 1 mm之 在電壓 能夠增 峰値， 見圖（b 之後端 作成爲 〇 爲可動 箭號所 )的後 生強力 比起無 緣a ( -15- 1359934 19a)的部分與形成於缺口部（31)的前端的邊緣b(31b )之兩部位能夠產生峰値。 因此，藉由拉出冷凍室門（9)時所產生之第1及第 2負荷之峰値（A) (B)的大小、間隔尺寸’來設定缺口 部（31)的寬度、深度、及前補助軛（19)的長度尺寸即 可，在本實施例的情況，至前述缺口部（31)的前端爲止 之深度係爲從前述第1峰値（a)至第2峰値（b)爲止之 2 7mm。 缺口部（31)係藉由將其前端如前述圖6所示般形成 爲矩形狀，使得在柱塞（22)的邊緣（22a)接近前補助 軛（19)的缺口部（31)前端的邊緣b(31b)之時間點 上，獲得作爲清晰的產生力之第2峰値（b)者，例如， 若拉入用彈簧的開放部分的特性爲急劇者的話，也能正確 地予以對應。 藉由上述結構，能以下述方式進行動作，β卩，當爲了 打開冷凍室門（9 )而接觸觸控式開關（1 6 )時，對螺線 管（18)進行通電，柱塞（22)抗衡返回用彈簧（28)的 力而被吸引至管（21)內，並藉由水平移動朝門側突出。 然後，與柱塞（22)移動的同時，推壓棒（23)也朝前方 移動，其前端卡合於敲擊構件（27)的卡合片（27a)， 藉此使敲擊構件（27)朝前方突出，進而按壓冷凍室門（ 9)的裏面來將門打開。 此時’在第1峰値（a)，藉由55N的產生力，勝過 磁鐵墊片（6)的吸附力’而將該墊片從本體開口部拉離 -16- 1359934 ，進一步產生位移而到達第2峰値（b)之際，產 的力，勝過拉入用彈簧的自閉力，而將門打開。 再者，前述門的實際之開放位置，非在對螺線 )進行通電時，柱塞（22)進行相當於螺線管（18 程（50〜60mm )後之位置，而是藉由螺線管的產 严弓負荷之差所蓄積的力道，打開大約200〜300mm ，當超過第2峰値（b)時，拉入用彈簧的自閉力 用，僅以對應於滑軌（1 1 )的摩擦力之產生力，將 門（9 )打開，因此，使用者能夠極輕的力道，將 至期望的位置，可良好地進行儲藏品的取出、收納 對螺線管（18)進行通電之時間爲1秒鐘，由 通型態而非柱塞（22 )抵接於固定子之吸引子型態 不會有衝撃聲發生之問題，又，由於使柱塞（22) 讓敲擊構件（27 )突出後，藉由消勢，使得柱塞（ 用返回用彈簧（28)的復原力朝後方移動，因此不 一直處於朝門前面突出之狀態，而成爲進行下一次 作用之待機狀態。 又，作爲前補助軛的缺口部形狀的其他實施例 如圖8中之側面圖（a )、斜視圖（b )所示，將前 (19’）的缺口部（31’）的前端邊緣b(31b’）的 成爲圓弧狀，或，如圖9所示，將前補助軛（19” 口部（31”）的前端邊緣b(31b”）形成爲在軸方 傾斜部之角形狀。如前述般，在將缺口部的前端邊 31b’） （31b”）形成爲圓弧狀或形成爲具有傾斜部 生45N 管（18 :)的行 生力與 之位置 不會作 冷凍室 門打開 作業。 於爲貫 ，故， 作動而 22)利 會成爲 開門操 ，亦可 補助軛 形狀形 )的缺 向具有 緣b ( 之角形 -17- 1359934 狀的情況，第2峰値（b)的產生力之豎立會成爲平緩的 形狀，能夠獲得與冷凍室門（9)開放移動的同時，產生 力平滑地上昇、下降之寬度廣的產生力的峰値。 若依據前述實施例的話，例如，可適用於拉入用彈簧 的開放部分平緩地脫離之這種特性之情況，藉由缺口部（ 31’） （31”）之圓弧狀的曲線弧度、傾斜部的傾斜度、或 這些的組合，能夠獲得藉由負荷特性來對應之正確的螺線 管（18 )的產生力。 在上述各實施例，說明了關於將螺線管（18)的產生 力的峰値設定於兩部位者，但亦可如圖1〇所示，將前補 助軛（39)的缺口部（41)設置成爲與圓筒之軸方向正交 的複數個寬度尺寸，並沿著軸方向成爲3段的方式形成邊 緣（a ) ( b ) ( c )的話，能對位移量，設置三部位的產 生力的峰値，藉由缺口形狀，產生力可更進一步設置多數 的峰値。 關於上述，亦可如圖1 1所示，藉由依次排列設置分 別使圓筒部之缺口形狀或徑方向的隙縫（51)的寬度不同 之複數個前補助軛a(49a)、同b(49b)、同c(49c) ，來形成設有邊緣（a) (b) (c)之補助軛（49)，藉 由前述邊緣，作成爲當位移時會具備複數個產生力的峰値 之螺線管（18)。 又，亦可與在前述各實施例說明過的設有缺口部（31 )、（41 )、或隙縫（51 )之形狀不同，如圖12所示， 藉由由複數個厚度不同之材料所構成圓筒（59a) ( 59b ) -18- 1359934 來形成前補助軛（59 )，如此，在圓筒之內側，沿 方向形成階差（61a) (61b)，藉由此階差之邊緣 ' 獲得與前述實施例同樣地具有產生力的複數個峰値 管（18 )。 作爲其他實施例，亦可如圖13所示，前補助_ )，並列配置利用透磁率不同的複數個強磁性體材料 低透磁率之圓筒（69a )與高透磁率之圓筒（69b )， φ 具複數個峰値。 再者，在前述各實施例，以開放門裝置之採用對 爲抽屜式冷凍室門進行了說明，但不限於此，亦可例 使將旋轉式冷藏室門開門時之磁鐵墊片拉離的部位與 防止門半開用之負荷的抵抗部位的兩部位具有螺線管 力的峰値者，且，亦可在法式雙門式門，將當開門時 成爲磁鐵墊片的吸附面之可動區隔構件轉動之抵抗部 前述同樣地作成爲第2螺線管產生力的峰値部位。 【圖式簡單說明】 圖1係顯示本發明的1實施形態的電冰箱之開門 的冷凍室部分之斜視圖。 圖2係顯示圖1的冷凍室部分的關門狀態之縱斷 〇 圖3係顯示圖2之開放門單元部分之解斜視圖。 圖4係顯示圖3之開放門單元的詳細之關門狀態 斷面圖Λ 位移 能夠 螺線 (69 例如 使其 象作 如， 成爲 產生 ，使 位與 狀態 面圖 的平 -19- 1359934 圖5係顯示圖3的開放門單元對螺線管的位移之產生 力及負荷特性圖。 圖6係顯示圖4的補助軛，（a)爲側面圖、（b)爲 斜視圖。 圖7係顯示圖4的開放門單元的要部之側斷面圖。 _ 8係顯示圖6的補助軛的其他實施例之側面圖（a )與斜視圖（b)。 圖9係顯示圖6的補助軛的其他實施例之側面圖。 圖10係顯示圖6的補助軛的其他實施例之側面圖。 圖11係顯示圖6的補助軛的其他實施例之側面圖。 圖12係顯示圖6的補助軛的其他實施例之側斷面圖 〇 圖1 3係顯示圖6的補助軛的其他實施例之側斷面圖 〇 【主要元件符號說明】 I :電冰箱本體 5 :冷凍室 8、10、12 :容器 9 :冷藏室門 II :滑軌 13 :區隔壁部 1 5 :開放門單元 1 6 :觸控式開關 -20- 1359934 17 :軛 • 18 :螺線管 前補助軛 ' 19、19、19，，、39、49、59、69: 19a、19a5' 19a，，：邊緣 a 21 :管 22 :柱塞 2 2 a :邊緣 φ 23 :推壓棒 24 :螺線管盒 27 :敲擊構件 28 :返回用彈簧 31、 31’、 31”、 41、 51:缺口部 31b、31b’、31b”：邊緣 b 6 1 a、6 1 b :階差 -21 -1359934 IX. Description of the Invention [Technical Field of the Invention] The present invention relates to a refrigerator equipped with an automatic open door device. [Prior Art] In recent years, household refrigerators have the following tendency, and even if the food and drink are diversified, the storage capacity is increased, and the level of more than 400 liters is becoming mainstream, and the height and width of the refrigerator main body are also increased. tendency. As a result, the doors of the refrigerating compartment, the freezing compartment, and the vegetable compartment are also increased in size, and the storage rack, the drawer type freezer compartment, and the fruit and vegetable compartment door on the inner side of the rotary refrigerating compartment door have an increase in height and width and an increase in the depth dimension. The tendency to store more foods is also large, so it requires a lot of power to open the door. For women with small strength and old people, the burden is increased and they are required to be improved. In view of the above-mentioned refrigerating compartment, since the storage volume is the largest, the door is divided into left and right to be a double door mode, or a touch operation is performed by the user on the surface of the refrigerator door, so that the switch is actuated to drive the solenoid to push A refrigerator in which a pressure bar protrudes from the body side, whereby an automatic opening door mechanism that presses the door and opens the door is provided in the market, and an article that does not require burden as a door opening is evaluated and the automatic door is applied to the aforementioned double door type door. The structure of the device is proposed (for example, refer to Patent Document 1). In the open door device for a refrigerating compartment described in Patent Document 1, since the door is a revolving door pivotally attached to a hinge of the main body, the pressing position and the pushing force are adjusted from the hinge portion as the starting point of the rotation. It is possible to open the door in the case of -5 - 1359934. However, in order to make the door opening direction non-rotating, the direction of the opening of the door is long in the straight direction, or the reaction is pressed in order to close the door. When the door is opened again, it is also possible to close the door by self-reliance, and the drawer rail is provided with an inclined portion toward the lower side of the back, or a mechanism for pulling in with a spring. Therefore, as described above, in order to automatically open the door by the generating force of the solenoid, as in the above-described open door device of the rotary door, it is necessary to exceed the peak opening force of the peak load corresponding to the peak of the plurality of loads, It is not only better than the suction force for pulling on the magnet spacer, but also better than the self-closing force of the spring for pulling in. However, in the conventional solenoid, the point at which the force is generated is shifted. In one point, in order to overcome the gate load with peaks at a plurality of discrete positions, it is not necessary to use a solenoid having a great force. [Patent Document 1] Japanese Patent Laid-Open Publication No. 2000-A No. 3, No. 3, No. 3, the disclosure of the Invention [Problems to be Solved by the Invention] As described above, the solenoid has a large generating force, and the spiral is The structural size of the tube itself becomes large, which makes it difficult to install in the refrigerator, and since the generating force is extremely large, the opening speed at the time of opening the door becomes too fast, and the door is opened to be strong, and the impact on the user is generated. . Further, in terms of price, there is a problem that the number of packages of the coil increases, which is expensive. Further, as the open door device, it is also possible to make a motor type structure without using a solenoid. However, due to the motor type, the door opening speed is slow, and the force of pushing the door is weak - 6359934 is weak 'so' compared to the solenoid The way, the correspondence, the feeling of opening the door is poor. The present invention has been developed in view of the above problems, and an object of the present invention is to provide a refrigerator having an open door device which can be used for miniaturizing a solenoid and used in a refrigerator and which is also inexpensive in cost. . [Means for Solving the Problem] In order to solve the above problems, a refrigerator according to the present invention is characterized in that: Φ includes: a door that closes a front opening portion of the storage compartment; and a switch that is actuated by operation of the door; And an open door unit which is disposed on the main body side opposite to the inside of the door and is opened by the operation of the switch, and the open door unit is performed by a solenoid which is wound around the outer circumference of the tube. When the current is sucked, the pressing rod provided at the front end of the plunger that moves in the axial direction in the tube protrudes forward to perform a door opening operation, and the solenoid is generated at a moving distance of the plunger. The force characteristic has a peak of two or more parts. [Effect of the Invention] According to the refrigerator of the present invention, since the generating force of the solenoid as the open door device has a plurality of peaks, the force generated by the load due to the displacement at the time of opening the door can be generated. By providing a safe automatic opening without waste and efficient door opening, the solenoid can be miniaturized and easily used in a refrigerator, and can be manufactured at low cost. [Embodiment] 1359934 Hereinafter, an embodiment of the present invention will be described based on the drawings. Fig. 1 is a perspective view showing the appearance of the freezer portion of the lowermost stage of the refrigerator of the present invention, and Fig. 2 is a longitudinal sectional view of Fig. 1. The refrigerator body (1) formed by the outer box, the inner box, and the heat insulating box filled with the heat insulating material between the inner and outer boxes is inside the inner box and serves as a storage space at the uppermost portion. The refrigerating compartment (2) is placed underneath, and the ice-storing ice storage compartment (3) and the temperature-switching compartment (4) are divided into left and right sides by the partition wall of the thermal insulation zone. The vegetable and fruit compartment, although not specifically shown, is disposed in the space below the refrigerating compartment (2). Further, in the lowermost portion, a freezer compartment (5) is disposed independently, and a front door is opened in the front of each storage compartment, and a dedicated door is provided to be opened and closed. The opening of the refrigerating chamber (2) having the largest storage capacity is a left-right rotary door, and the double-door type door and the magnet spacer attached to the peripheral edge of the door are hermetically sealed inside and outside. An automatic opening door mechanism for opening a door by a user's touch operation on the surface of the door, an ice making ice storage chamber (3) disposed at a lower portion of the refrigerating chamber (2), a temperature switching chamber (4), and In the same manner as the above-described refrigerating chamber (2), the freezing chamber (5) is hermetically sealed inside and outside by a magnet spacer (6) attached to the periphery of the inner panel of the door, and is attached to the inside of the door and toward the storage compartment. The pair of right and left support frames (7) extending in the deep side are placed with their respective storage containers (8)', and the freezing compartment door (9) is made into a drawer type by the aforementioned support frame (7) The way of the track mechanism with the inner wall of the library, which is pulled out of the library and pulled forward and backward. -8 - 1359934 The storage container (8) of the freezer compartment (5) has a box shape with a deep bottom opening, and a flange portion is formed on the periphery of the upper surface of the opening, and the above opening is almost formed by the flange portion. The dish-shaped intermediate container (10) having a shallower bottom toward the rear recessed portion, such as an ice-making milk container or the like, which has a portion of the cutting front edge, is placed. Further, when the freezing compartment door (9) is pulled out, the middle container (10) is provided with a slide rail disposed between the support frame (7) and the inner wall surface of the reservoir (the same) as the storage container (8). 11) The rear end of the freezer compartment (5) is drawn forward from the front opening portion, and is pulled out in a fully open state, and the middle container (10) is provided at the flange portion of the storage container (8). The upper container can be slid in the front-rear direction to open and close the upper opening of the container (8), and the middle container (1) can be pulled out and stored. The storage container (8) and the middle container (10) are provided independently of the opening and closing of the containers (8) (10) and the freezing compartment door (9), and are independently pulled out and stored in the upper section of the storage compartment. Container (12). The upper stage container (12) is located above the middle stage container (1〇), but the holding thereof is not directly supported by the support frame (7)' of the door, but is formed in the opening formed in the upper stage container (12) itself. The flange portion of the side edge protrudes toward the side wall of the freezer compartment (5) and protrudes inwardly from the support rail (not shown), and the structure that can be slidably supported back and forth is a load load that is not applied to the support freezer compartment door. (9) The structure of the middle container (10) and the support frame (7) and the slide rail (11) of the storage container (8) of the lower stage are not interlocked with the opening of the freezer door (9). Therefore, 'in the case of pulling it out', after pulling out the freezer compartment door (9), holding the handle formed on the front wall of the upper container (12) itself, -9- 1359934, and pulling it out by itself, and pushing again Enter indoors. Thus, in the central portion in the width direction of the partition wall portion (13) between the ice making ice storage chamber (3) and the temperature switching chamber (4) in the upper portion of the freezing chamber (5), as shown in the exploded oblique view of FIG. Shown, there is an open door unit (15). In the case of the present embodiment, the open door unit (15) is provided not only for the partition wall for the upper and lower chambers, but also for the storage container (8) and the upper container (12). The partition wall portion (13) for pulling in or accommodating, and the ineffective space that cannot be used as the original storage space can be effectively utilized as the storage space of the open door unit (15). The open door unit (15) is a touch switch formed by a magnetic bar of a handle portion (9a) formed on the surface of the freezer compartment door (9), similarly to the door of the rotary refrigerator compartment (2). (1 6) performing a touch operation, using the Hall 1C, the microcomputer to control the driver, as shown in FIG. 4, which is a flat cross-sectional view of the closed state, is placed in the yoke (17), and the coil is wound around A solenoid (18) which is formed by resin on the outer circumference of the bobbin is separated from the inside of the solenoid (18) in order to offset the position of the peak of the attraction force, and is disposed in front of and behind the axial direction. a stainless steel front auxiliary yoke (19) and a rear auxiliary yoke (20), and a cylindrical tube (21) made of brass inside the front and rear auxiliary yokes (19) (20), by the aforementioned spiral The tube (18) is configured to be energized to attract and move the magnetic plunger (22) horizontally in the axial direction of the tube (21), and the pressing rod (23) fixed to the front end of the plunger (22). The open door unit (15) is screw-fixed to a spiral line attached to the front and rear ranges of the partition wall portion (13) via a cushioning material such as a rubber bushing. Tube box (24). -10- 1359934 The group of the plunger (22) and the pressing rod (23) is three-dimensional, and in the case of the present embodiment, "because it is installed in the freezing temperature space", there is a case where the door is opened, etc., due to the intrusion of outside air. The possibility of condensation and icing, in order to prevent freezing, without affecting the function, the opening is sealed closed by a solenoid cover (25). In the front end portion, the metal sliding portion such as the plunger (22) in the solenoid case (24) is hermetically sealed so as not to come into contact with the moisture of the freezer compartment (5) space, and is pressed. The front end portion of the rod (23) may extend forward, and a silicone gasket (26) formed in a bellows shape is provided, and the sealing gasket (26) is installed in the direction of the freezing chamber door (9). A striking member (27) of a protruding member formed of a synthetic resin. Further, when the solenoid (18) is energized, the front end portion of the pressing rod (23) is extended forward by the horizontal movement toward the front of the plunger (22), and the gasket is sealed ( 26) The pressing piece (27a) that is erected on the rear portion of the striking member (27) is pressed, and the front end portion of the striking member (27) protrudes toward the back side of the freezing chamber door (9). In this way, since the striking member (27) is made to be pressed by the engaging piece (27a) as a member different from the pressing bar (23), there is an advantage that it is not necessary to press the pressing portion inside the door. The axis of the sliding shaft of the plunger (22) is aligned or the pressing bar (23) is placed at a predetermined position to be bent, and the setting adjustment of the installation place of the solenoid (18) can be effectively set. In the invalid space inside the partition (13). At the other end of the plunger (22), there is provided a return spring (28) composed of a compression coil spring, which is formed to protrude the plunger (22) toward the solenoid -11 - 1359934 (18) When the solenoid (18) is energized after stopping in the opposite direction, the push rod (23) is again stored in the tube of the solenoid (18) by the return spring (28). )Inside. Further, the surface of the open door unit (15) including the striking member (27) disposed in the solenoid case (24) is covered by the unit cover (29) to prevent intrusion of cold air and to prevent external force. Destructive protection, and also protection against the safety of the charging unit. (30) in Fig. 1 is a door switch formed by a reed switch or the like provided on the side of the refrigerator main body (1) facing the inside of the lower side of the freezer compartment door (9), and is closed at the door. Then, by detecting the magnetic force of the magnet spacer (6) provided in the freezer compartment door (9), the opening and closing state of the freezing compartment door (9) is detected. The door switch (30) is not controlled only by detecting the opening and closing of the door, controlling the rotation of the cooling fan in the room, and the like, and in the case where the freezing compartment door (9) is opened, it is controlled so as not to actuate the opening door unit (15). . Thereby, even when the freezing door (9) is opened and accidentally touched to the touch switch (16), the solenoid (18) is not energized, and the striking member (27) can be prevented. In the case of a dangerous person who protrudes unexpectedly toward the space in front of the body, the open door unit (15) can operate only when the freezing chamber door (9) is completely closed. The basic structure of the open door unit (15) is as described above, in the case where the freezer compartment door (9) is opened, by the door switch (30), the freezer compartment door (9) is closed, and the door is operated. The touch switch (16) of the handle (9a) is touch-operated to energize the solenoid (丨8) via the driver-12-1359934 (power circuit) for 1 second. Then, the solenoid (18) is used to cause the plunger (22) to counteract the force of the return spring (28) to attract the movement to perform the door opening operation. Further, in the drawer type door such as the freezing compartment door (9), in order to prevent insufficient press-fitting during closing of the door, the so-called half-closed half-door state is stopped in a state where a gap is formed between the front door and the main body, and When the other door is prevented from being strongly closed, the door that has been closed is opened due to the wind pressure, and for the purpose of automatically closing the door, the following mechanism is set, that is, the action is set in the slide rail (11) The unloading spring that pulls the freezing chamber door (9) toward the closing door, and the mechanism that closes or maintains the door in the half-closed state by the self-closing force. Therefore, when the drawer type freezer compartment door (9) is opened, the force of the magnet spacer (6) when the door is removed and the force of the self-closing force that is the spring of the pull-in spring of the load body are pulled. The peaks are stored as loads, and the open door unit (15) must have a force capable of displace the plunger (22) and open the door in response to these loads. The generating force of the moving distance of the solenoid (18) to the plunger (22) is an electromagnetic force, which is affected by the amount of the magnetic flux. If it is a ferroelectric circuit, the high magnetic permeability material and the larger the sectional area are stronger. In the case of a copper circuit, a large number of coils are wound into an ampere (current X winding number) to become strong. However, all of the above conditions are to increase the weight of the solenoid itself, and the size is also large. In the conventional solenoid having only one point of the peak of the generated force, in order to carry a load having a plurality of peaks as described above, it is necessary to The generating force is set to be higher than the displacement of the door at all parts of the load, so the solenoid must be produced to a maximum of -13,359,934. Therefore, the solenoid itself is further enlarged, the device is also enlarged, and a space for setting is required, because the portion not only causes a reduction in space for storage, but also causes a door opening when the door is opened due to a large force generated. The speed and strength become too large, and there will be a problem of the lack of user punching at the time of opening the door, and the problem that the price becomes extremely expensive will also occur. In view of these circumstances, in the present invention, the solenoid (18) is constructed such that the attractor type which generates the maximum force is not generated at the final point where the plunger (22) hits the sliding of the stator, and In the through-type of the tube (21), the cylindrical auxiliary yoke (19) (20) is provided in front and rear, and the length and shape of the front auxiliary yoke (19) are set to correspond. The force of the peak of the load at the plurality of parts when the freezing chamber door (9) is pulled out. As shown in Fig. 5 showing the relationship between the load force of the moving displacement amount of the door and the solenoid generating force of the present embodiment, the opening point is taken as 〇, and the closing point is located at a position separated by 46 mm from the opening point. The door load at the time of opening the door from the door opening action is such that the magnet spacer (6) provided at the opening of the door counteracts the force exerted on the body side by the magnetic force, and is separated by 3 8 mm from the opening point. The position produces a first peak (A) which produces a load of approximately 30 N for pulling away. However, when the load 値 is the reference 値, the magnet shims (6) are increased in the degree of adhesion by the adhering matter during use of the refrigerator, and actually become a curve indicated by a broken line, and the first peak is A) Become a load of around 50N. Hereinafter, the actual enthalpy shown by a broken line will be described. Pulling off the magnet-14- 1359934 The door load after the spacer (6) is reduced to 20N by the weight of the storage compartment (9) and the storage container (8). However, at the position where the first peak 値 (/ moving distance is 20 to 30 mm, at the position where the opening point is 27 mm after the present embodiment is separated by 11 mm, the elastic force of the spring as the door as the door is maximized. When the second peak fj is formed and the load 値 is larger than 35N, it is necessary to overcome the load 値. In order to correspond to the change in the load ,, in the present embodiment, the first peak of the force generated by the tube (18) (a) ) is set to be 55N at the position where the door is opened 38 mm, and the second peak 値 (b) is set to 4 5 N at the same point. Further, when the generating force of the solenoid (18) is 85 V, The voltage is changed to 100V or the like to change, and the force is increased or adjusted. Since two parts are provided in the generating force characteristic of the solenoid, the side view (a) and the same oblique angle of the first embodiment are shown in FIG. ) is formed by extending in the axial direction toward the front side from the cylindrical portion of the front auxiliary yoke (19). The characteristic of the peak-shaped notch portion (31) from the front end and the rectangular portion of the front end is such that the peak-crowding force characteristic of the two portions is as shown in Fig. 7 of the schematic diagram, and the plunger (22) of the workpiece is closed. The position of the 2-point lock line of the state slides as shown, and when the front end edge (22a) is close to the front auxiliary yoke (the edge a (l 9a) of the 19 end, the peak of the force generated at the closest position' 'By forming the notch portion (31)', the gap is low, but the weight of the side body of the front auxiliary yoke (19) is increased, and the force from the moving closing force 1 (B) . Separating the spiral point by 1 mm can increase the peak voltage, as shown in the figure (b after the end becomes the movable arrow), the post-generation strength is compared with the part of the missing a ( -15- 1359934 19a) and formed in the gap. The two ends of the edge b (31b) of the front end of the portion (31) are capable of generating a peak. Therefore, the width, depth, and depth of the notch portion (31) are set by the size and spacing size of the peaks 値(A)(B) of the first and second loads generated when the freezing chamber door (9) is pulled out. The length of the front auxiliary yoke (19) may be sufficient. In the case of the present embodiment, the depth from the front end of the notch portion (31) is from the first peak (a) to the second peak (b). 2 7mm so far. The notch portion (31) is formed in a rectangular shape by the front end thereof as shown in Fig. 6, so that the edge (22a) of the plunger (22) approaches the front end of the notch portion (31) of the front auxiliary yoke (19). At the time point of the edge b (31b), the second peak 値(b) which is a clear generating force is obtained. For example, if the characteristic of the open portion of the pull-in spring is sharp, it can be accurately matched. With the above configuration, it is possible to operate in the following manner, when the touch switch (1 6 ) is touched in order to open the freezing compartment door (9), the solenoid (18) is energized, and the plunger (22) It is attracted to the tube (21) against the force of the return spring (28), and protrudes toward the door side by horizontal movement. Then, while the plunger (22) is moved, the pressing rod (23) also moves forward, and the front end thereof is engaged with the engaging piece (27a) of the striking member (27), thereby causing the striking member (27). ) protrudes forward, and then presses the inside of the freezer compartment door (9) to open the door. At this time, in the first peak (a), the generating force of 55N is better than the adsorption force of the magnet spacer (6), and the spacer is pulled away from the opening of the body by -16 - 1359934, further shifting When the second peak (b) is reached, the force produced is better than the self-closing force of the spring, and the door is opened. Furthermore, when the actual open position of the door is not energized, the plunger (22) is placed at a position corresponding to the solenoid (18 steps (50 to 60 mm), but by a spiral The force accumulated by the difference between the production and the bowing load of the tube is about 200 to 300 mm. When the second peak (b) is exceeded, the self-closing force of the spring is pulled in, corresponding only to the sliding rail (1 1 ) The force of the friction force opens the door (9), so that the user can extremely lightly move the force to the desired position, and the storage can be taken out and the time for energizing the solenoid (18) can be satisfactorily performed. For 1 second, the attractor type that is in contact with the stator by the pass type rather than the plunger (22) does not have the problem of squeaking, and, because the plunger (22) is allowed to strike the member (27) After the protrusion is made, the plunger (moving rearward by the restoring force of the return spring (28) is moved backward, so that it does not always protrude toward the front of the door, and becomes the standby state for the next action. Another embodiment of the shape of the notch portion as the front auxiliary yoke is shown in the side view (a) in FIG. As shown in the oblique view (b), the front end edge b (31b') of the front (19') notch portion (31') is formed in an arc shape, or as shown in Fig. 9, the front auxiliary yoke (19" is provided. The front end edge b (31b") of the mouth portion (31") is formed in an angular shape at the inclined portion of the axial direction. As described above, the front end side 31b') (31b") of the notch portion is formed into an arc shape or formed. In order to have a 45N tube (18:) with a sloping part, the position will not open the freezer door. Therefore, the operation will be 22) and the yoke shape will be assisted. The vacancy has a margin b (the shape of the angle -17-1359934), and the erection of the generating force of the second peak 値(b) becomes a gentle shape, and can be obtained while opening and moving with the freezing compartment door (9). The force of the force that smoothly rises and falls is wide, and if it is according to the foregoing embodiment, for example, it can be applied to the case where the open portion of the pull-in spring is gently disengaged, by the notch portion ( 31') (31") arc-shaped curve curvature, inclination of the inclined portion Or a combination of these, it is possible to obtain the generating force of the correct solenoid (18) corresponding to the load characteristic. In each of the above embodiments, the setting of the peak of the generating force of the solenoid (18) is described. In the two parts, as shown in FIG. 1A, the notch portion (41) of the front auxiliary yoke (39) is set to have a plurality of width dimensions orthogonal to the axial direction of the cylinder, and is 3 along the axial direction. When the edge (a) (b) (c) is formed in the manner of the segment, the peak of the generating force of the three portions can be set for the displacement amount, and the peak shape can be further generated by the shape of the notch. As shown in FIG. 11, a plurality of front auxiliary yokes a (49a) and b (49b) each having a notch shape in the cylindrical portion or a width of the slit (51) in the radial direction may be arranged in order. With c(49c), a supplementary yoke (49) having edges (a), (b) and (c) is formed, and by the aforementioned edge, a solenoid which has a plurality of peaks which generate force when displaced (18). Further, it may be different from the shape in which the notch portions (31), (41), or slits (51) are provided in the above embodiments, as shown in Fig. 12, by a plurality of materials having different thicknesses. Forming a cylinder (59a) (59b) -18- 1359934 to form a front auxiliary yoke (59) such that, on the inside of the cylinder, a step (61a) (61b) is formed in the direction, by the edge of the step In the same manner as the foregoing embodiment, a plurality of peak-tubes (18) having a force are obtained. As another embodiment, as shown in FIG. 13, the front auxiliary _) may be arranged in parallel with a plurality of low magnetic permeability cylinders (69a) and high magnetic permeability cylinders (69b) having different magnetic permeability. , φ has a plurality of peaks. Furthermore, in the foregoing embodiments, the drawer type freezer door has been described with the use of the open door device, but the present invention is not limited thereto, and the magnet case when the rotary refrigerator door is opened may be pulled away. The two parts of the resistance part of the part and the load for preventing the half-opening of the door have a peak of the solenoid force, and may also be a movable double-door type door, which becomes a movable section of the adsorption surface of the magnet spacer when the door is opened. The resisting portion for rotating the member is similarly formed as a peak portion of the second solenoid generating force. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a portion of a freezer compartment of a refrigerator in accordance with an embodiment of the present invention. Fig. 2 is a longitudinal sectional view showing a closed door portion of the freezer compartment portion of Fig. 1. Fig. 3 is a perspective view showing a portion of the open door unit of Fig. 2. Figure 4 is a cross-sectional view showing the detailed closing state of the open door unit of Figure 3. The displacement can be spiraled (for example, it is made to be, for example, produced, the position and the state of the face are flat -19 - 1359934. Fig. 6 shows the generation force and load characteristic diagram of the displacement of the solenoid by the open door unit of Fig. 3. Fig. 6 shows the auxiliary yoke of Fig. 4, (a) is a side view, and (b) is a perspective view. A side cross-sectional view of the main part of the open door unit of Fig. 4. _ 8 shows a side view (a) and a perspective view (b) of another embodiment of the auxiliary yoke of Fig. 6. Fig. 9 shows the auxiliary yoke of Fig. 6. Fig. 10 is a side view showing another embodiment of the auxiliary yoke of Fig. 6. Fig. 11 is a side view showing another embodiment of the auxiliary yoke of Fig. 6. Fig. 12 is a view showing the auxiliary yoke of Fig. 6. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side cross-sectional view showing another embodiment of the auxiliary yoke of FIG. 6. [Main component symbol description] I: refrigerator body 5: freezer compartments 8, 10, 12 : Container 9 : Refrigerator door II : Slide 13 : Zone partition 1 5 : Open door unit 1 6 : Touch switch -20 - 1359934 17 : Yoke • 18 : Solenoid front auxiliary yoke '19, 19, 19,, 39, 49, 59, 69: 19a, 19a5' 19a,,: Edge a 21 : Tube 22: Plunger 2 2 a : edge φ 23 : push rod 24 : solenoid case 27 : tap member 28 : return springs 31, 31', 31", 41, 51: notch portions 31b, 31b', 31b": edge b 6 1 a, 6 1 b : step difference - 21