200900645 九、發明說明 【發明所屬之技術領域】 本發明是關於對應操作構件的操作使得冰箱或冷凍室 的門自動開門的冰箱用開門裝置。 【先前技術】 冰箱提供具備對應設置在冷藏室或冷凍室的門的操作 構件的操作，使該門自動開門的開門裝置。 做爲該種開門裝置’尤其是抽屜式門的開門用的開門 裝置’從抽屜式門與外框並未形成以鉸鏈等連結的構成來 看，並不能將檢測設置在門側的操作構件（開門鍵等）的 操作用開關等電連接在外框側。 因此，例如第13圖表示開門裝置的操作部101是具 備設置在外框1 0 2 (例如間隔冰箱內的隔板的前端部等） 的按鍵開關1 03及與該按鍵1 03相對設置在門丨〇4內面側 的按壓棒105所構成。該按壓棒105是與設置在門1〇4前 面側（第1 3圖左側）的操作構件（未圖示）的操作連動 形成朝著箭頭HI、H2方向滑動，藉按壓棒1〇5按壓按鍵 開關103時（參閱第13(b)圖），開門裝置（未圖示） 將門1 04朝著開放方向推壓開門（參閱第1 3 ( c )圖）。 但是，以上的構成中，由於按鍵開關1 03及推壓棒 1 05是形成露出外部的狀態（剝開的狀態），因此該等按 鍵開關1 03或推壓棒1 05會因溢出的湯汁或具黏附性食品 侵入到內部而導致開門裝置的動作不良。 -5- 200900645 相對於此，考慮在外框側設置簧片開關而不設置按鍵 開關1 03的開門裝置（例如，參閱專利文獻1 )。據此， 簧片開關即使不露出外部的狀態，仍可執行作爲因應操作 構件的操作而動作的開關的功能，因此該簧片開關側不致 有溢出湯汁等對於內部的侵入。 〔專利文獻1〕 日本特開2006-3 08 1 67號公報 【發明內容】 〔發明所欲解決的課題〕 專利文獻1記載的開門裝置中，與簧片開關相對設置 在門側的手柄是形成露出外部的狀態，該手柄的前端部安 裝有使得簧片開關動作用的永久磁鐵。因此，簧片開關側 (外框側）雖然可防止溢出湯汁等侵入內部，但是並不能 防止對於手柄側（門側）之溢出湯汁等侵入內部，導致開 門裝置的動作不良。 本發明是有鑑於上述問題所硏創而成，其目的是提供 防止對於外框側及門側因湯汁等侵入導致的動作不良，可 提升可靠度的冰箱用開門裝置。 〔解決課題用的手段〕 本發明的冰箱用開門裝置，具備有：設置在冰箱門上 的操作構件；設置在上述門上的磁鐵；對應上述操作構件 的操作使上述磁鐵的磁通狀態變化的磁通變化手段；及設 置在上述冰箱的外框，檢測根據上述磁通變化手段而變化 -6- 200900645 之上述磁鐵的磁通狀態的磁通檢測手段，根據上述磁通檢 測手段的檢測結果開放上述門的特徵。 〔發明效果〕 根據本發明的冰箱用開門裝置，在冰箱的門側，磁通 變化手段可因應操作構件的操作使磁鐵的磁通狀態產生變 化。另一方面，在冰箱的外框側，磁通檢測手段可檢測根 據磁通變化手段而變化的磁鐵的磁通狀態。並且根據磁通 檢測手段的檢測結果將門開啓。 如上述，由於構成因應操作構件的操作，在外框側檢 測門側因磁通變化手段而變化的磁鐵的磁通狀態，因此在 門側無須形成使磁鐵及磁通變化手段露出門外部的狀態（ 剝開的狀態），並且，也不需在外框側形成使磁性檢測手 段露出外框外部的狀態。因此，可以防止在外框側及門側 因湯汁等侵入而導致動作不良，可提升冰箱用開門裝置的 可靠度。 【實施方式】 (第1實施形態） 針對本發明的第1實施形態一邊參閱第1圖至第4圖 說明如下。 第3圖爲冰箱1的前視圖。冰箱1，設有：冷藏室門 2a、2b ;製冰室門3 ;切換室門4 ;蔬菜室門5及冷凍室 門6該等的門2a、2b、3、4、5、6形成可分別開關設置 -7- 200900645 在冰箱1的外框7 (僅顯不間隔弟1圖及第2圖中設置在 該外框7內的蔬菜室與冷凍室之間的隔熱壁8的前端部） 內的冷藏室、製冰室、切換室、蔬菜室、冷凍室（皆未圖 示）。 冷藏室門2a是將左邊部樞支在外框7的迴轉式的門 ，冷藏室門2b是將右邊部樞支在外框7的迴轉式的門。 製冰室門3、切換室門4、蔬菜室門5及冷凍室門6爲分 別可在外框7的前方大致平行移動的抽屜式的門，該等門 3〜6的內側分別一體設有儲藏容器（未圖式）。各門2a、 2b、3、4、5、6的內側周緣部分別安裝有內設永久磁鐵 的墊圈（第1圖及第2圖僅表示冷凍室門6的墊圈9)。 冷藏室門2a右邊側的前面下部設有冷藏室用開門鍵 1 〇a (相當於操作構件），冷藏室2b左邊側的前面下部設 有冷藏室用開門鍵1 Ob (相當於操作構件）。蔬菜室門5 上邊部的前面中央部設有蔬菜適用開門鍵1 1 (相當於操 作構件），冷凍室6上邊部的前面中央部設有冷凍室用開 門鍵1 2 (相當於操作構件）。該等開門鍵1 0a、1 Ob、1 1 、1 2是構成可分別自動開啓冷藏室2a、2b ;蔬菜室門5 •，冷凍室門6的開門裝置（第4圖僅表示開啓冷凍室門6 的開門裝置1 3 )的操作部。 接著，針對開門裝置的操作部的構成一邊參閱第1圖 及第2圖說明如下。並且，開啓各門2&、2b、5、6的開 門裝置的操作部皆形成相同的構成’因而在此針對冷凍室 門6用的開門裝置1 3 (參閱第4圖）操作部14說明，省 -8- 200900645 略對於其他的門2a、2b、5用的開門裝置之操作部（ 示）的說明。 操作部1 4爲冷凍室用開門鍵1 2、磁鐵1 5、磁通 機構1 6 (相當於磁通變化手段）、簧片開關1 7 (相 磁性檢測手段）等所構成。 冷凍室用開門鍵1 2被收容在設置於冷凍室門6 側的收容部1 8內，藉著彈簧19朝著箭頭A2方向（ 室門6的前方）作用的狀態形成可朝著箭頭A1方向 的按鍵（推壓操作構件）。 磁鐵15整體是形成圓盤形的形狀，在N極與S 2極磁化。該磁鐵1 5是在設於冷凍室門6內的磁鐵 部2 0，以轉軸2 1爲中心朝著箭頭B1、B 2方向可轉 被收容著。磁鐵收容部2 0的後端側爲冷凍室門6內 的壁部6a所封閉，藉此形成磁鐵1 5不致露出冷凍室 外部的狀態（剝開的狀態）。壁部6a的內側沿著磁| 的外圍形成有圓弧形缺口的缺口部22’該缺口部22 該磁鐵1 5配置在盡量可能接近外框7側位置的構成。 磁通變化機構16爲設置在冷凍室用開門鍵12的 相後方突出的齒條23，及設置在磁鐵15的下面中央 該磁鐵15形成一體轉動的小齒輪24所構成，該等 23與小齒輪24形成彼此咬合。 冷凍室用開門鍵12 —旦朝著第1圖中箭頭A1 按壓操作時，藉著齒條23使得小齒輪24在第1圖中 B1方向轉動，與此同時磁鐵15在第1圖中箭頭B1 未圖 變化 當於 前面 冷凍 按壓 極的 收容 動地 面側 門6 I 15 形成 內側 部與 齒條 方向 箭頭 方向 -9- 200900645 轉動（此時爲1/4轉）（參閱第2圖）。亦即，與冷凍室 用開門鍵12的按壓操作連動使磁通變化機構16 (齒條23 及小齒輪24)形成轉動磁鐵15的構成。另一方面，解除 冷凍室用開門鍵12的按壓操作，使該冷凍室用開門鍵12 藉著彈簧19的作用力回到第2圖中的箭頭A2方向時， 利用齒條23使得小齒輪24朝著第2圖中箭頭B2方向轉 動，與此同時使磁鐵15朝著第2圖中箭頭B2方向轉動（ 1/4轉）（參閱第1圖）。 此時，磁通變化機構1 6擔負著作爲冷凍室用開門鍵 1 2的直線運動與磁鐵1 5的轉動運動彼此轉換的轉換機構 的功能。 並且，藉著將磁鐵15朝著箭頭B1、B2方向的轉動 ，使得該磁鐵1 5影響外框7側的磁通狀態產生變化。此 時，在第1圖表示的狀態中’由於磁鐵1 5的磁化方向相 對於外框7的前面形成大致垂直的方向’因此該磁鐵1 5 影響外框7側的磁通減弱。另一方面，第2圖表示的狀態 中，磁鐵1 5的磁化方向由於相對於外框7的前側形成大 致平行的方向，因此該磁鐵1 5影響外框7側的磁通增強 〇 箬片開關17被配置在嵌入_熱壁8內的隔熱材8a中 的例如塑膠製的收容構件25內。收容構件25的前端側爲 壁部25a所封閉，藉此’使簧片開關1 7不形成露出於外 框7外部的狀態（剝開的狀態）° 寶片開關17 一旦使得該簧片開關17周邊的磁通增強 -10- 200900645 時，使得內部的2條簧片導線（未圖示）彼此磁化接觸， 形成開啓狀態。另一方面’該簧片開關1 7周邊的磁通減 弱時，2條的簧片導線藉著彼此的彈性離開，形成關閉狀 態。因此，第1圖表示的狀態（未按壓冷凍室用開門鍵 1 2的狀態）中’簧片開關1 7形成關閉狀態’第2圖表示 的狀態（按壓冷凍室用開門鍵12的狀態）中，簧片開關 1 7是形成開啓狀態。 接著，針對冰箱1的電氣構成一邊參閱第4圖說明如 下。 控制裝置26是以微電腦爲主體所構成，作爲控制冰 箱1的全般動作之用。該控制裝置26連接有開門裝置1 3 、簧片開關1 7、門開關2 7等。開門裝置1 3例如是以線 圈與活動鐵心構成的電磁驅動源（未圖不）爲主體所構成 ，根據來自控制裝置26的驅動訊號將冷凍室門6朝開放 方向推壓。門開關27是檢測冷凍室門6爲關門狀態之用 ，冷凍室門6 —旦關門時輸出開啓訊號。並且，控制裝置 26是形成根據來自簧片開關1 7或門開關27的訊號控制 開門裝置1 3的動作。再者’冷藏室門2a、2b ;蔬菜室門 5同樣分別設置檢測該冷藏室門2a、2b ;蔬菜室門5爲關 門狀態的門開關（未圖示）。 接著，針對上述構成的作用說明如下。控制裝置26 一旦根據來自門開關27的訊號判斷冷凍室門6爲關門狀 態時，判斷簧片開關1 7是否形成開啓狀態。由此一狀態 根據使用者按壓操作冷凍室用開門鍵，使簧片開關1 7形 -11- 200900645 成開啓狀態時，控制裝置2 6使得開門裝置i 3動作將冷凍 室門1 6朝著開放方向推壓而開門。 再者’控制裝置26是與上述冷凍室門6用的開門裝 置13的場合相同’同樣控制其他的門2b、5用的開 門裝置（未圖示）的動作。亦即，控制裝置2 6在門2 a、 2b、5側與開門鍵1 〇a、i 〇b、〗丨的按壓操作連動而變化 的磁鐵（未圖示）的磁通狀態，在外框7側藉著簧片開關 (未圖示）加以檢測’根據此一檢測結果控制各門2a、 2 b、5用的開門裝置的動作。 根據以上已說明的本實施形態，在冰箱1的冷凍室門 ό側’磁通變化機構1 6是與冷凍室用開門鍵1 2的按壓操 作連動使得磁鐵1 5的磁通狀態變化。另一方面，在冰箱 1的外框7側，簧片開關1 7是檢測根據磁通變化機構1 6 而變化之磁鐵1 5的磁通狀態。並且，根據簧片開關1 7的 檢測結果開啓冷凍室門6。 如上述，由於和冷凍室用開門鍵12的按壓操作連動 ，在冷凍室門6側根據磁通變化機構1 6而變化的磁鐵15 的磁通狀態形成外框7側藉著簧片開關1 7可檢測的構成 ，因此在冷凍室門6側磁鐵1 5及磁通變化機構1 6沒有形 成露出冷凍室門6外部狀態（剝開的狀態）的必要’並且 也沒有在外框7側形成將簧片開關1 7露出外框7外部狀 態的必要。因此’在外框7側及冷凍室門6側可以防止因 湯汁等的侵入導致的動作不良’可提升開門裝置1 3的可 靠度。 -12- 200900645 又，針對其他的門2 a、2 b、5用的開門裝置，其操作 部與上述操作部1 4爲相同的構成可進行相同的控制，因 此可以防止因湯汁等的侵入導致的動作不良，可提升開門 裝置13的可靠度。 (第2實施形態） 接著’針對本發明的第2實施形態一邊參閱第5圖說 明如下。再者，對於和上述第1實施形態相同的部份省略 其說明，僅針對不同部份說明。第5圖爲槪略表示冷凍室 6用的開門裝置1 3的操作部3 1內部構成的橫剖面上視圖 〇 操作部3 1爲冷凍室用開門鍵3 2 (相當於操作構件） 、磁鐵1 5、突輪機構3 3、簧片開關1 7等所構成。 冷凍室用開門鍵32被收容在設置於冷凍室門6前面 側的按鍵收容部3 4，形成可朝著箭頭A 1方向按壓的按鍵 〇 突輪機構3 3爲設置在冷凍室用開門鍵3 2內側向後方 突出的桿35，及設置在磁鐵15的下面中央部與該磁鐵15 一體轉動的突輪3 6所構成。突輪3 6外圍部的一部份（第 5圖中的上側一部份）設有相對於桿3 5的突出方向呈平 滑的谷狀凹陷的卡止部36a，該卡止部36a卡止著桿35 的前端部3 5 a。突輪3 6中夾持轉軸2 1彼此相對的位置上 ，設有在轉軸21的平行方向延伸的突起’該等突起分別 掛設有安裝在按鍵收容部3 4側插穿-軸2 1的盤簧3 7的 -13- 200900645 端部。該盤簧37將突輪36(磁鐵15)朝著箭頭B2方 作用的同時，經由突輪3 6及桿3 5將冷凍適用開門鍵 朝著箭頭A2方向作用。 冷凍室用開門鍵32 —旦朝著箭頭A1方向按壓操 時’藉著桿35的前端部35a將突輪36的卡止部36a朝 箭頭A1方向推壓，與此同時，磁鐵15朝著箭頭Bi方 轉動（1 /4轉）。亦即’與冷凍室用開門鍵3 2的按壓操 連動形成突輪機構33 (桿35及突輪36)使磁鐵15轉 的構成。另一方面’冷凍室用開門鍵32的按壓操作一 解除時’藉著盤簧37的作用力使得突輪36及磁鐵15 著箭頭B2方向轉動（1/4轉），隨之使冷凍室用開門 32回到箭頭A2方向。 此時’突輪機構3 3擔負著作爲冷凍室用開門鍵3 2 直線運動與磁鐵1 5的轉動運動彼此轉換的轉換機構的 能。 根據本實施形態，與冷凍室用開門鍵3 2的按壓操 連動，在冷凍室門6側以突輪機構3 3變化後的磁鐵1 5 磁通狀態作爲外框7側利用簧片開關1 7檢測的構成， 此冷凍室門6側無須形成使得磁鐵1 5及突輪機構3 3露 冷凍室門6外部的狀態，並且也無需在外框7側使簧片 關17形成露出外框7外部的狀態。因此可防止外框7 及冷凍室門6側因湯汁等的侵入導致的動作不良，可提 開門裝置1 3的可靠度。 再者，詳細說明雖然省略’但是針對其他的門2a 向 3 2 作 著 向 作 動 旦 朝 鍵 的 功 作 的 因 出 開 側 升 -14- 200900645 2b、5用的開門裝置（未圖示），以其操作部（未圖示） 作爲與上述的操作部31相同的構成進行相同的控制，因 此可防止因湯汁等侵入導致的動作不良，可提升開門裝置 的可靠度。 又，本實施形態中，構成突輪機構33的突輪36不僅 限於具有上述的卡止部3 6a的形狀，只要可以彼此轉換桿 3 5 (冷凍室用開門鍵3 2 )的直線運動與突輪（磁鐵）的 轉動運動的形狀即可。例如，如第6圖表示，也可以設置 與磁鐵15 —體轉動的橢圓形的突輪38，在該突輪38的 側周部38a卡止桿35的前端部35a。 (第3實施形態） 接著，針對本發明的第3實施形態一邊參閱第7圖說 明如下。並且，針對與上述第1實施形態相同部份省略其 說明，僅針對不同的部份說明。第7圖爲槪略表示冷凍室 門6用的開門裝置1 3的操作部4 1之內部構成的橫剖面上 視圖。 上述的第1實施形態雖是表示N極與S極的2極磁 化後的磁鐵1 5，但是本實施形態的磁鐵42是將N極與s 極沿著該磁鐵42的周圍方向交替配置，整體磁化爲8極 。此外，雖然未圖示，但是本實施形態中，同樣例如具備 上述第1實施形態表示的磁通變化機構16，與冷凍室用 開門鍵1 2的箭頭A1、A2方向的直線運動連動使磁鐵42 形成在箭頭Bl、B2方向的轉動。 -15- 200900645 冷凍室用開門鍵12 一旦朝著箭頭A1方向按壓操作 時，磁鐵4 2朝著箭頭B 1方向轉動（1 / 4轉），使得該磁 鐵42影響簧片開關1 7周邊的磁通狀態變化。此時，由於 磁鐵42磁化爲8極’因此斷續地變化該磁鐵42影響簧片 開關17周邊之磁通的變化。簧片開關17因應磁鐵42斷 續變化的磁通狀態重複著ΟΝ/OFF狀態，輸出第8 ( a)圖 表示的斷續脈衝訊號。 控制裝置26是與冷凍室用開門鍵12的按壓操作連動 接受來自簧片開關1 7的斷續的脈衝訊號時，使開門裝置 1 3動作將冷凍室門6朝著開放方向推壓而開門。 磁鐵磁化爲2極的場合，該磁鐵的磁通狀態僅有2個 狀態的變化，因此與冷凍室用開門鍵1 2的按壓操作連動 從簧片開關17所輸出的訊號是形成如第8(b)圖表示的 連續訊號。因此，在控制裝置26爲了檢側冷凍室用開門 鍵1 2的按壓操作，將磁鐵組裝在磁鐵收容部2 〇時，必須 以該磁鐵的轉動位置作爲預定的轉動位置（磁鐵的磁通狀 態與冷凍室用開門鍵12的按壓操作連動而適當變化的轉 動位置）加以組裝。 相對於此，根據本實施形態，將磁鐵4 2磁化爲8極 。因此’該磁鐵4 2的轉動位置無論如何配置組裝，在按 壓操作冷凍室用開門鍵1 2時，可以從簧片開關1 7輸出斷 續的脈衝訊號使開門裝置1 3動作。因此，可容易進行磁 鐵42的組裝作業。 再者，磁鐵42的磁化數不僅限於8極，也可以磁化 -16- 200900645 爲4極以上的多極磁鐵。 (第4實施形態） 接著’針對本發明第4實施形態一邊參閱第9圖 如下。並且’針對與上述第1實施形態相同的部份省 說明’僅針對不同的部份加以說明。第9圖是槪略表 凍室門ό用開門裝置1 3的操作部5 1的內部構成的橫 上視圖。 操作部5 1爲冷凍室用開門鍵52 (相當於操作構 、磁鐵53、磁屏蔽機構54 (相當於磁通變化手段） 片開關1 7等所構成。 冷凍室用開門鍵5 2在設置於冷凍室門6內的收 5 5前端側配置可在箭頭A 1、Α2方向移動。 磁鐵5 3整體是形成矩形的形狀，磁化爲N極與 的2極。該磁鐵5 3在其磁化方向相對於外框7的前 成大致平行方向的狀態配置在收容部5 5的後端側（ 圖的右側）。 磁屏蔽機構54爲控制桿56與磁屏蔽板57 (相 磁屏蔽構件）所構成。控制桿5 6被設置在收容部5 5 端部可以迴轉軸5 8爲中心朝著箭頭D 1、D 2方向迴 該控制桿5 6設有朝著平行迴轉軸5 8的方向延伸的 56a，該突起56a掛設有迴轉軸58插穿的盤簧59的 部5 9 a。該盤簧5 9使控制桿5 6朝著箭頭D 2方向作 同時，經由抵接在冷凍室用開門鍵52內面的控制桿 說明 略其 示冷 剖面 件） 、簧 容部 S極 面形 第9 當於 的前 轉。 突起 一端 用的 56的 -17- 52 200900645 前端部5 6b (第9圖中左側端部）使該冷凍室用開關鍵 朝著箭頭A2方向作用。 磁屏蔽板5 7例如爲具有屏蔽磁場性質的金屬（磁 體的例如鐵）等的材料所構成，其整體形成圓弧形的形 。該磁屏蔽板5 7的一端部被安裝在控制桿5 6的後端 56c (第9圖中右側的端部）。 冷凍室用開門鍵5 2 —旦被朝著箭頭A1方向按壓 作時，與控制桿5 6同時使磁屏蔽板5 7朝著箭頭D1方 迴轉。亦即，與冷凍室用開門鍵52的按壓操作連動使 磁屏蔽機構54形成磁屏蔽板57在磁鐵53與簧片開關 之間進出的構成。另一方面，一旦解除冷凍室用開門 52的按壓操作時，藉著盤簧59的作用力使控制桿56 磁屏蔽機構54朝著箭頭D2方向迴轉’隨之使冷凍室 開門鍵5 2被朝著控制桿5 6的前端部按壓而回到箭頭 方向。 此時，磁屏蔽機構5 4擔負著作爲使冷凍室用開門 52的直線運動與磁屏蔽板57的迴轉運動彼此轉換的轉 機構的功能。 並且，磁屏蔽板57藉著朝箭頭Dl、D2方向的迴 ，使得磁鐵5 3影響外框7側的磁通狀態產生變化。此 ，磁屏蔽板5 7位在第9圖中實線表示位置的狀態（未 壓操作冷凍室用開門鍵5 2的狀態）中’磁鐵5 3的磁性 磁屏蔽板5 7所屏蔽，該磁鐵5 3影響外框7側的磁通幾 完全消失。因此’簧片開關17形成關閉狀態。力方 性 狀 部 操 向 得 17 鍵 及 用 A2 鍵 換 轉 時 按 爲 乎 面 -18- 200900645 ，磁屏蔽板57位在第9圖中虛線袠示位置的狀態 操作冷凍室用開門鍵52的狀態）中，磁鐵53的磁 爲磁屏蔽板57所屏蔽，該磁鐵15形成增強影響^ 側的磁通。因此，簧片開關1 7形成開啓狀態。 根據本實施形態，與冷凍室用開門鍵5 2的按 連動，冷凍室門6側根據磁屏蔽機構54而變化的丨 的磁通狀態，是形成在外框7側藉簧片開關丨7檢 成，因此在冷凍室6側沒有形成將磁鐵5 3及磁屏 5 4露出冷凍室門6外部狀態的必要，並且在外框 沒有將簧片開關1 7形成露出外框7外部狀態的必 此，可以防止外框7側及冷凍室門6側因湯汁等的 致的動作不良，可提升開門裝置1 3的可靠度。 再者，雖然省略詳細說明，但是針對其他的尸 2b、5用的開門裝置（未圖示），其操作部（未圖 成與上述操作部5 1相同的構成進行相同的控制， 可以防止因湯汁等的侵入導致的動作不良，可提升 置的可靠度。 (第5實施形態） 接著，針對本發明的第5實施形態一邊參閱第 說明如下。此外’針對與上述第1實施形態相同的 略其說明，僅針對不同的部份說明。第1 〇圖是槪 冷凍室門6用的開門裝置1 3的操作部6 1內部構成 面上視圖。 (按壓 性不致 t框17 壓操作 玆鐵53 測的構 蔽機構 7側也 要。因 侵入導 3 2 a、 示）形 因此， 開門裝 1 0圖 部份省 略表示 的橫剖 -19- 200900645 操作部6 1爲冷凍室用開門鍵62 (相當於操作構件 、門側磁鐵63、磁結合機構64 (相當於磁通變化手段 、外框側磁鐵65 '按鍵式開關66 (相當於磁通檢測手 )等所構成。 冷凍室用開門鍵62在設於冷凍室門6內的收容部 的前端側（第1 〇圖的左側）被配置可在箭頭A1、A2 向移動。 門側磁鐵63在設於收容部67後端側的引導部68 被配置可在箭頭El、E2方向（前後方向）移動。 磁結合機構64爲設置在冷凍室用開門鍵62的內側 突出後方的桿72，及收容部67內設置可以迴轉軸73 中心迴轉的門側控制桿74所構成。設置在門側控制桿 一端部（第1 0圖中下側的端部）的長孔部安裝有門側 鐵63，另外端部（第10圖中上側的端部）是與桿72 合。 外框側磁鐵6 5在收容構件2 5內被安裝於設置在以 轉軸6 9爲中心可在箭頭F 1、F 2方向迴轉的外框側控制 70的前端側。外框側控制桿70藉彈簧71形成朝著箭 F 1方向作用的狀態。 按鍵式開關66在收容構件25內被配置在外框側控 桿70的更後方（第10圖中的右方），按鍵66a是形成 外框側控制桿70所推壓操作的構成。該按鍵式開關66· 連接在控制裝置26上，一旦按壓操作按鍵66a時即輸 開啓訊號。 ) ) 段 6 7 方 內 » 爲 7 4 磁 卡 迴 桿 頭 制 藉 被 出 -20- 200900645 冷凍式用開門鍵62 —旦被朝著箭頭A1方向按壓操 作時，藉著桿72推壓門側控制桿74的另外端部’藉此’ 使門側磁鐵63再引導部68內朝著箭頭E1方向移動。亦 即，與冷凍式用開門鍵62的按壓操作連動’磁結合機構 64 (桿72及門側控制桿74 )使得門側磁鐵63在前後方 位移動，形成在門側磁鐵63吸附外框側磁鐵65的狀態（ 第1 0圖以實線表示的狀態）與門側磁鐵63從外框側磁鐵 6 5分開的狀態（第1 〇圖虛線表示的狀態）切換的構成。 門側磁鐵63在箭頭E 1方向移動時’使得該門側磁鐵63 與外框側磁鐵6 5的磁結合減弱’藉以使外框側控制桿7 0 利用彈簧7 1的作用力在箭頭F 1方向迴轉。並且，利用外 框側控制桿70按壓操作按鍵式開關66的按鍵66a ’該按 鍵是開關6 6輸出開啓訊號。 此時，磁結合機構64擔負著作爲冷凍室用開門鍵62 的直線運動與門側磁鐵63直線運動之彼此轉換用的轉換 機構的功能。 根據本實施形態，與冷凍式用開門鍵62的按壓操作 連動，以冷凍室門6側中藉磁結合機構64而變化的門側 磁鐵63的磁通狀態作爲外框7側藉按鍵式開關66檢測的 構成，因此在冷凍室門6側沒有將門側磁鐵63及磁結合 機構64露出冷凍室門6外部狀態的必要，並且，也沒有 在外框7側將按鍵式開關66露出外框7外部狀態的必要 。因此，可以防止外框7側及冷凍室門6側因湯汁等的侵 入導致的動作不良，可提升開門裝置13的可靠度。 -21- 200900645 再者，雖然省略其詳細說明，但是針對其他的門2a 、2b、5用的開門裝置（未圖示），其操作部（未圖示） 同樣形成與上述操作部61相同的構成進行同樣的控制， 因此，可以防止因湯汁等的侵入導致的動作不良，可提升 開門裝置的可靠度。 作爲磁通檢測手段不僅限於上述的按鍵式開關66， 也可以使用使用檢測門側磁鐵63吸附在外框側磁鐵65的 狀態或分開狀態的開關。 (第6實施形態） 接著，針對本發明的第6實施形態一邊參閱第1 1圖 說明如下。此外’針對與上述第1實施形態相同的部份省 略其說明，僅針對不同的部份說明。第1 1圖是槪略表示 冷凍室門6用開門裝置1 3的操作部8 1之內部構成的橫剖 面上視圖。 操作部8 1爲冷凍室用開門控制桿82 (相當於操作構 件）、磁鐵1 5、磁通變化機構8 3 (相當於磁通變化手段 )、簧片開關17等所構成。 冷凍室用開門控制桿82在設於冷凍室門6內的收容 部84前端側藉迴轉軸85樞支著上邊部，形成可以在第 11 (b)圖中箭頭Gl、G2方向（上下方向）迴轉的拉桿 (拉動操作構件）。 磁通變化機構8 3爲在冷凍室用開門控制桿8 2內側藉 迴轉軸82a所樞支而朝後方突出的齒條86，及設置在磁 -22- 200900645 鐵1 5的下面中央與該磁鐵1 5 —體轉動的小齒輪24所構 成，該等齒條86與小齒輪24爲彼此咬合。 冷凍室用開門控制桿82 —旦被朝著第1 1 ( b )圖中 鍵頭G1方向迴轉操作（拉動操作）時，藉齒條86使得 小齒輪24朝著第1 1 ( a )圖中鍵頭B1方向轉動，與此同 時，磁鐵15朝著第11(a)圖中鍵頭B1方向轉動（：i/4 轉）。亦即，與冷凍室用開門控制桿82的迴轉操作連動 使磁通變化機構83 (齒條86及小齒輪24 )形成轉動磁鐵 1 5的構成。 此時，磁通變化機構8 3擔負著作爲冷凍室用開門控 制桿8 2的迴轉運動與磁鐵1 5轉動運動之彼此轉換用的轉 換機構的功能。 本實施形態中，同樣在冷凍室門6側沒有將磁鐵1 5 及磁通變化機構83形成露出冷凍室門6的外部狀態的必 要，並且也沒有在外框7側形成將簧片開關1 7露出外框 7外部狀態的必要。因此，在外框7側及冷凍室門6側可 以防止因湯汁等的侵入導致的動作不良，可提升開門裝置 13的可靠度。 再者，雖然省略詳細說明，但是針對其他的門2a、 2b、5用的開門裝置（未圖示），使其操作部（未圖示） 形成與上述操作部81相同的構成以進行相同的控制，因 此可以防止因湯汁物等侵入導致的動作不良，提升開門裝 置的可靠度。 本實施形態中，各門2a、2b、5、6的開門控制桿並 -23- 200900645 非如冷凍室用開門控制桿82僅限於上下方向的迴轉’也 可以在左右方向迴轉。 (第7實施形態） 接著，針對本發明的第7實施形態一邊參閱第1 2圖 說明如下。此外，針對與上述第1實施形態相同的部份省 略其說明，僅針對不同的部份說明。第12圖是槪略表示 冷凍室門6用開門裝置1 3的操作部9 1之內部構成的橫剖 面上視圖。 操作部9 1爲冷凍室用開門按鍵1 2 (相當於操作構件 )、磁鐵1 5、磁通變化機構1 6、霍爾IC 9 2 (相當於磁檢 測手段）等所構成。 霍爾IC92被配置在收容構件25內，封閉該收容構件 2 5前端側的壁部2 5 a，藉此形成不露出外框7外部的狀態 〇 霍爾IC92是因應磁鐵15影響霍爾IC92周邊的磁通 狀態的變化而在開啓狀態與關閉狀態間切換。本實施形態 中，隨著磁鐵15的轉動，磁鐵15的S極接近霍爾IC92 時（N極遠離時），該霍爾1C 92形成開啓狀態。另一方 面，從霍爾IC 9 2使得磁鐵1 5的S極遠離時（N極接近時 )，該霍爾IC92形成關閉狀態。因此’未按壓操作冷凍 室用開門鍵12的狀態（第12圖表示的狀態）下’霍爾 IC92是形成關閉狀態，按壓操作冷凍室用開門鍵1 2的狀 態下，霍爾IC92則是形成開啓狀態。 -24- 200900645 霍爾IC 92是連接在控制裝置26上，控制裝置26是 根據來自該霍爾1C 92的訊號控制開門裝置1 3的動作。 本實施形態中，在冷凍室門6側同樣沒有將磁鐵i 5 及磁通變化機構1 6形成露出冷凍室門6外部狀態的必要 ，並且在外框7側也沒有將霍爾IC92形成露出框體7外 部狀態的必要。因此，在外框7側及冷凍室門6側可以防 止因湯汁等的侵入導致的動作不良，可提升開門裝置13 的可靠度。 再者，雖然省略詳細說明，但是針對其他的門2a、 2b、5用的開門裝置（未圖示），使其操作部（未圖示） 形成與上述操作部91相同的構成以進行相同的控制，因 此可以防止因湯汁物等侵入導致的動作不良，提升開門裝 置的可靠度。 上述各實施形態中，也可以使用霍爾1C 92而非簧片 開關17。 (其他的實施形態） 本發明不僅限於上述各實施形態，也可以進行以下的 變形與擴張。 作爲磁通檢測手段不僅限於簧片開關1 7 '霍爾IC92 ，只要可檢測磁鐵的磁通狀態即可。 本發明不僅是使用迴轉式的門、抽拉式的門用開關裝 置’也可以運用左右雙開式門用的開門裝置。 並且，如上述的冰箱1不僅是具備冷藏功能及冷凍功 -25- 200900645 能的冰箱’也可以運用在冷藏裝用機上。 【圖式簡單說明】 第1圖是表示本發明的第1實施形態，（a)是槪略 表示冰箱用開門裝置的操作部之內部構成的橫剖面上視圖 ，（b )爲縱剖面側視圖。 第2圖是表示不同狀態相當於第1圖的圖。 第3圖爲冰箱的前視圖。 第4圖是槪略表示冰箱的電性構成的方塊圖。 第5圖是表示本發明第2實施形態之相當於（a)的 圖。 第6圖是表示變形例的相當於第1 (a)圖。 第7圖是表示本發明第3實施形態的相當於第丨（a )圖。 第8圖是表示從簧片開關輸出訊號的圖。 第9圖是表示本發明第4實施形態的相當於第1 ( a )圖。 第1 〇圖是表示本發明第5實施形態的相當於第1 ( a )圖。 第1 1圖是表示本發明第6實施形態的相當第1圖。 第12圖是表示本發明第7實施形態的相當於第1 (a )圖。 第1 3圖是槪略表示習知開門裝置之操作部構成的縱 剖面側視圖。 -26- 200900645 【主要元件符號說明】 圖示中，1爲冰箱；2a、2b、3、4、5、6爲門；7爲 外框；1 0 a、1 0 b、1 1、1 2爲開門鍵。 -27-200900645 IX. [Technical Field] The present invention relates to a door opening device for a refrigerator that automatically opens a door of a refrigerator or a freezer compartment in response to an operation of the operating member. [Prior Art] The refrigerator provides an operation of an operation member having a door corresponding to a refrigerator compartment or a freezer compartment, A door opening device that automatically opens the door. As such a door opening device, in particular, a door opening device for opening a door of a drawer type door is viewed from a configuration in which the drawer door and the outer frame are not connected by a hinge or the like. It is not possible to electrically connect the operation switch for detecting an operation member (opening key, etc.) provided on the door side to the outer frame side. therefore, For example, Fig. 13 shows that the operation unit 101 of the door opening device is provided with a push button switch 103 provided on the outer frame 110 (for example, the front end portion of the partition in the refrigerator), and is disposed at the threshold 4 opposite to the button 103. The pressing rod 105 on the inner surface side is constituted. The pressing bar 105 is formed to face the arrow HI in conjunction with the operation of an operation member (not shown) provided on the front side (the left side of the third figure) of the door 1〇4. Sliding in the H2 direction, When the button switch 103 is pressed by the push bar 1〇5 (refer to Fig. 13(b)), The door opening device (not shown) pushes the door 104 toward the opening direction (see Figure 13 (c)). but, In the above composition, Since the push button switch 103 and the push bar 105 are in a state of being exposed to the outside (a state of being peeled off), Therefore, the push button switch 103 or the push bar 105 may cause a malfunction of the door opening device due to the overflow of the soup or the adhesive food. -5- 200900645 Relative to this, Consider installing a reed switch on the outer frame side without setting the door opening device of the button switch 103 (for example, See Patent Document 1). According to this, The reed switch does not expose the external state, The function of the switch that operates in response to the operation of the operating member can still be performed, Therefore, the reed switch side does not cause overflow of the soup or the like for internal invasion. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2006-3 08 1 67 [Invention] [Problems to be Solved by the Invention] In the door opening device described in Patent Document 1, Opposite the reed switch, the handle on the door side is exposed to the outside. A permanent magnet for operating the reed switch is mounted on the front end of the handle. therefore, The reed switch side (outer frame side) prevents spillage of soup and the like into the interior. However, it does not prevent the overflowing of the soup on the handle side (door side) from entering the inside. The malfunction of the door opening device is caused. The present invention has been made in view of the above problems, The purpose is to prevent malfunctions caused by intrusion of soup or the like on the outer frame side and the door side. A door opening device for refrigerators that can improve reliability. [Means for Solving the Problem] The door opening device for a refrigerator according to the present invention Have: An operating member disposed on the refrigerator door; a magnet disposed on the door; a magnetic flux changing means for changing a magnetic flux state of the magnet in response to the operation of the operating member; And disposed in the outer frame of the above refrigerator, a magnetic flux detecting means for detecting a magnetic flux state of the magnet according to the magnetic flux changing means, -6-200900645, The characteristics of the above door are opened based on the detection result of the above magnetic flux detecting means. [Effect of the Invention] A door opening device for a refrigerator according to the present invention, On the door side of the refrigerator, The magnetic flux changing means changes the magnetic flux state of the magnet in response to the operation of the operating member. on the other hand, On the side of the frame of the refrigerator, The magnetic flux detecting means detects the magnetic flux state of the magnet which changes according to the magnetic flux changing means. And the door is opened according to the detection result of the magnetic flux detecting means. As above, Due to the operation of the component in response to the operation, Checking the magnetic flux state of the magnet that changes due to the magnetic flux change means on the side of the outer frame, Therefore, it is not necessary to form a state in which the magnet and the magnetic flux change means are exposed to the outside of the door on the door side (the state of being peeled off). and, It is not necessary to form a state in which the magnetic detecting means is exposed to the outside of the outer frame on the outer frame side. therefore, It is possible to prevent malfunction due to intrusion of soup or the like on the outer frame side and the door side. It can improve the reliability of the door opening device for refrigerators. [Embodiment] (First Embodiment) A first embodiment of the present invention will be described below with reference to Figs. 1 to 4 . Fig. 3 is a front view of the refrigerator 1. Refrigerator 1, Featuring: Refrigerator door 2a, 2b ; Ice making room door 3; Switching the door 4; Vegetable door 5 and freezer door 6 such doors 2a, 2b, 3, 4, 5, 6 Forming a switchable setting -7-200900645 In the outer frame 7 of the refrigerator 1 (only the insulation wall 8 between the vegetable compartment and the freezing compartment provided in the outer frame 7 in FIG. 1 and FIG. 2 is shown Refrigerator in the front end) Ice making room, Switch room, Vegetable room, Freezer compartment (all not shown). The refrigerating compartment door 2a is a rotary door pivotally supporting the left side portion of the outer frame 7. The refrigerating compartment door 2b is a swing type door pivotally supporting the right side portion of the outer frame 7. Ice-making room door 3, Switching the door 4 The vegetable compartment door 5 and the freezer compartment door 6 are drawer-type doors that can move substantially in parallel in front of the outer frame 7, respectively. The inside of each of the doors 3 to 6 is integrally provided with a storage container (not shown). Each door 2a, 2b, 3, 4, 5, A gasket having a permanent magnet is attached to each of the inner peripheral portions of the sixth portion (the first and second figures show only the gasket 9 of the freezing chamber door 6). The front lower portion on the right side of the refrigerating compartment door 2a is provided with a refrigerating compartment opening key 1 〇a (corresponding to an operating member), The front lower portion on the left side of the refrigerating compartment 2b is provided with a refrigerating compartment opening key 1 Ob (corresponding to an operating member). The front center of the upper part of the vegetable compartment door 5 is provided with a vegetable opening button 1 (corresponding to an operating member). A freezer door opening key 1 2 (corresponding to an operating member) is provided at the front center portion of the upper side portion of the freezing compartment 6. The door opening keys 10a, 1 Ob, 1 1 , 1 2 is a configuration that can automatically open the refrigerating compartment 2a, 2b ; Vegetable room door 5 •, The door opening device of the freezing compartment door 6 (the fourth drawing only shows the operating portion of the door opening device 13 that opens the freezing compartment door 6). then, The configuration of the operation unit for the door opening device will be described below with reference to Figs. 1 and 2 . and, Open each door 2& , 2b, 5, The operation portions of the door opening device of 6 are formed in the same configuration. Therefore, the operation unit 14 for the door opening device 13 (see Fig. 4) for the freezing door 6 is explained here. Province -8- 200900645 Slightly for other doors 2a, 2b, 5 Description of the operating part (shown) of the door opening device. The operation unit 14 is an opening button for the freezer compartment. Magnet 1 5 Magnetic flux mechanism 16 (corresponding to magnetic flux change means), A reed switch 17 (phase magnetic detecting means) or the like is formed. The freezer opening door key 12 is housed in the accommodating portion 18 provided on the side of the freezing compartment door 6, A button (pushing operation member) which can be directed in the direction of the arrow A1 is formed by the action of the spring 19 in the direction of the arrow A2 (in front of the chamber door 6). The magnet 15 as a whole has a disk shape. Magnetized at the N pole and S 2 pole. The magnet 15 is a magnet portion 20 provided in the freezer compartment door 6, Centering on the axis of rotation 2 1 toward the arrow B1 The B 2 direction can be transferred to be accommodated. The rear end side of the magnet housing portion 20 is closed by the wall portion 6a in the freezing chamber door 6. Thereby, the state in which the magnet 15 is not exposed to the outside of the freezing compartment (the state of being peeled off) is formed. The inner side of the wall portion 6a is formed with a notch portion 22' having a circular arc-shaped notch along the outer periphery of the magnetic material. The notch portion 22 is disposed so as to be as close as possible to the outer frame 7 side. The magnetic flux changing mechanism 16 is a rack 23 that is disposed rearward of the opening of the freezer door opening key 12, And disposed at the center of the lower surface of the magnet 15, the magnet 15 is formed by an integrally rotating pinion 24, These 23 and the pinion gear 24 form a mesh with each other. When the freezer opening button 12 is pressed toward the arrow A1 in Fig. 1, By the rack 23, the pinion gear 24 is rotated in the B1 direction in Fig. 1, At the same time, the magnet 15 is not changed in the arrow B1 in the first drawing. When the front side of the frozen pressing electrode is moved, the side door 6 I 15 forms an inner portion and the direction of the rack direction arrow -9-200900645 (this time is 1/4) Turn) (see Figure 2). that is, In conjunction with the freezing chamber, the magnetic flux changing mechanism 16 (the rack 23 and the pinion 24) forms the rotating magnet 15 in conjunction with the pressing operation of the opening button 12. on the other hand, Release the pressing operation of the opening button 12 in the freezing compartment, When the freezer opening button 12 is returned to the direction of the arrow A2 in FIG. 2 by the urging force of the spring 19, The pinion 24 is rotated by the rack 23 in the direction of the arrow B2 in Fig. 2, At the same time, the magnet 15 is rotated (1/4 turn) in the direction of the arrow B2 in Fig. 2 (refer to Fig. 1). at this time, The magnetic flux changing mechanism 16 is responsible for the function of a switching mechanism that converts the linear motion of the opening button 1 2 of the freezer compartment and the rotational motion of the magnet 15 to each other. and, By moving the magnet 15 toward the arrow B1 B2 direction rotation, This magnet 15 affects the change in the magnetic flux state on the side of the outer frame 7. at this time, In the state shown in Fig. 1, the magnet 15 affects the magnetic flux on the side of the outer frame 7 due to the fact that the magnetization direction of the magnet 15 forms a substantially perpendicular direction with respect to the front surface of the outer frame 7. on the other hand, In the state shown in Figure 2, The magnetization direction of the magnet 15 is formed in a substantially parallel direction with respect to the front side of the outer frame 7, Therefore, the magnet 15 affects the magnetic flux enhancement on the side of the outer frame 7, and the cymbal switch 17 is disposed in the housing member 25 made of, for example, plastic, which is embedded in the heat insulating material 8a in the thermal wall 8. The front end side of the housing member 25 is closed by the wall portion 25a. Thereby, the reed switch 17 is not formed in a state of being exposed to the outside of the outer frame 7 (the state of being peeled off). When the leaf switch 17 increases the magnetic flux around the reed switch 17 by -10-200900645, Causing the inner two reed wires (not shown) to be in magnetic contact with each other, Form an open state. On the other hand, when the magnetic flux around the reed switch 17 is weakened, The two reed wires leave by the elasticity of each other. Form a closed state. therefore, In the state shown in Fig. 1 (the state in which the door opener key 12 is not pressed in the freezer compartment), the state in which the reed switch 17 is in the closed state is shown in Fig. 2 (the state in which the door opening key 12 for the freezing compartment is pressed). The reed switch 17 is formed in an open state. then, The electrical configuration of the refrigerator 1 will be described below with reference to Fig. 4. The control device 26 is mainly composed of a microcomputer. It is used to control the general action of the ice box 1. The control device 26 is connected to the door opening device 1 3 , Reed switch 17 Door switch 2 7 and so on. The door opening device 13 is composed, for example, of an electromagnetic driving source (not shown) composed of a coil and a movable iron core. The freezing chamber door 6 is urged in the opening direction in accordance with the driving signal from the control unit 26. The door switch 27 is for detecting that the freezing chamber door 6 is in a closed state. The freezer door 6 outputs an opening signal when the door is closed. and, The control unit 26 is configured to control the operation of the door opening device 13 in response to a signal from the reed switch 17 or the door switch 27. Furthermore, the refrigerator door 2a, 2b ; The vegetable compartment door 5 is also separately provided for detecting the refrigerating compartment door 2a, 2b ; The vegetable compartment door 5 is a door switch (not shown) in a closed state. then, The effect of the above configuration will be described below. When the control device 26 determines that the freezing chamber door 6 is in the closed state based on the signal from the door switch 27, It is judged whether or not the reed switch 17 is in an open state. In this state, according to the user pressing the opening button of the freezing compartment, When the reed switch 1 7--11-200900645 is turned on, The control device 26 causes the door opening device i 3 to operate to push the freezing chamber door 16 toward the opening direction to open the door. Further, the control device 26 is the same as the case of the door opening device 13 for the above-described freezer door 6, and the other doors 2b are controlled in the same manner. The operation of the door opening device (not shown) for 5. that is, Control device 26 is at door 2a, 2b, 5 side and open door keys 1 〇a, i 〇b, 〗 The magnetic flux state of a magnet (not shown) that changes in conjunction with the pressing operation, On the side of the outer frame 7, the reed switch (not shown) is used to detect 'the door 2a is controlled according to the detection result, 2 b, 5 action of the door opening device. According to the embodiment described above, In the freezing chamber door side of the refrigerator 1, the magnetic flux changing mechanism 16 changes the magnetic flux state of the magnet 15 in conjunction with the pressing operation of the freezer door opening key 12. on the other hand, On the side of the outer frame 7 of the refrigerator 1, The reed switch 17 is a magnetic flux state in which the magnet 15 that changes according to the magnetic flux changing mechanism 16 is detected. and, The freezing compartment door 6 is opened in accordance with the detection result of the reed switch 17. As above, Since it is interlocked with the pressing operation of the opening door 12 by the freezing compartment, The magnetic flux state of the magnet 15 that changes according to the magnetic flux changing mechanism 16 on the side of the freezing compartment door 6 forms a configuration in which the outer frame 7 side is detectable by the reed switch 17. Therefore, the magnets 15 and the magnetic flux changing mechanism 16 on the freezer compartment door 6 are not formed to expose the outer state of the freezer compartment door 6 (the state of being peeled off), and the reed switch 17 is not exposed on the outer frame 7 side. The outer state of the outer frame 7 is necessary. Therefore, it is possible to prevent malfunction due to intrusion of soup or the like on the side of the outer frame 7 and the side of the freezer compartment door, and the reliability of the door opening device 13 can be improved. -12- 200900645 Again, For other doors 2 a, 2 b, 5 door opening device, The operation unit and the operation unit 14 have the same configuration, and the same control can be performed. Therefore, it is possible to prevent malfunction due to intrusion of soup or the like. The reliability of the door opening device 13 can be improved. (Second embodiment) Next, the second embodiment of the present invention will be described below with reference to Fig. 5. Furthermore, The description of the same portions as those of the first embodiment will be omitted. Only for different parts. Fig. 5 is a cross-sectional top view showing the internal structure of the operation unit 3 1 of the door opening device 1 for the freezing compartment 6 〇 The operation unit 3 1 is a freezer door opening key 3 2 (corresponding to an operation member), Magnet 1 5 Bulging mechanism 3 3, Reed switch 17 and so on. The freezer opening button 32 is housed in the button accommodating portion 34 provided on the front side of the freezing compartment door 6, A button that can be pressed in the direction of the arrow A1 is formed. The spur mechanism 3 3 is a rod 35 that is provided to protrude rearward from the inside of the freezer opening button 3 2 . And a burr 36 disposed at a central portion of the lower surface of the magnet 15 to rotate integrally with the magnet 15. A portion of the outer peripheral portion of the burr 36 (the upper portion in Fig. 5) is provided with a locking portion 36a which is grooved with respect to the protruding direction of the rod 35, and is valley-shaped recessed, The locking portion 36a locks the front end portion 35a of the lever 35. The position where the rotating shaft 2 1 is opposed to each other in the burr 36 The projections extending in the parallel direction of the rotary shaft 21 are provided. The projections are respectively attached to the ends of the -13-200900645 of the coil springs 37 which are inserted into the button housing portion 34 side and inserted into the shaft 2 1 . The coil spring 37 moves the collar 36 (the magnet 15) toward the arrow B2. The freeze-applied door opening button acts in the direction of arrow A2 via the spurs 36 and the levers 35. When the freezer door opening key 32 is pressed in the direction of the arrow A1, the locking portion 36a of the burr 36 is pressed in the direction of the arrow A1 by the front end portion 35a of the lever 35. at the same time, The magnet 15 is rotated toward the arrow Bi (1⁄4 turn). That is, the structure in which the magnet mechanism 15 is rotated is formed by the pressing operation of the freezer opening button 3 2 to form the jog mechanism 33 (the lever 35 and the collar 36). On the other hand, when the pressing operation of the opening button 32 for the freezing compartment is released, the urging force of the coil spring 37 causes the burr 36 and the magnet 15 to rotate in the direction of the arrow B2 (1/4 turn). The freezer compartment is then returned to the direction of arrow A2 by the opening door 32. At this time, the "boom mechanism 3 3" is responsible for the conversion mechanism for converting the linear motion of the freezer opening button 3 2 and the rotational movement of the magnet 15 to each other. According to this embodiment, In conjunction with the pressing operation of the freezer door with the opening button 3 2, The magnetic flux state of the magnet 15 that has been changed by the jog mechanism 3 3 on the side of the freezer compartment door 6 is detected by the reed switch 17 as the outer frame 7 side. The freezer compartment door 6 side does not need to be formed such that the magnet 15 and the spur mechanism 3 3 are exposed to the outside of the freezing compartment door 6, Further, it is not necessary to form the reed switch 17 on the outer frame 7 side to expose the outer portion of the outer frame 7. Therefore, it is possible to prevent malfunction of the outer frame 7 and the freezer door 6 due to intrusion of the soup or the like. The reliability of the door opening device 13 can be increased. Furthermore, Although the detailed description is omitted, the other side of the door 2a is directed to 3 2, and the function of the actuating key is increased. -14- 200900645 2b, 5 door opening device (not shown), The same control is performed by the operation unit (not shown) as the same configuration as the above-described operation unit 31, and the same control is performed. Therefore, it is possible to prevent malfunction due to intrusion of soup or the like. It can improve the reliability of the door opening device. also, In this embodiment, The quake 36 constituting the quake mechanism 33 is not limited to the shape having the above-described locking portion 36a. It suffices that the linear motion of the lever 3 5 (freezer opening button 3 2 ) and the rotational motion of the burr (magnet) can be switched to each other. E.g, As shown in Figure 6, An elliptical bumper 38 that rotates integrally with the magnet 15 may also be provided. The front end portion 35a of the lever 35 is locked to the side peripheral portion 38a of the quake 38. (Third embodiment) Next, The third embodiment of the present invention will be described below with reference to Fig. 7. and, The description of the same portions as those of the first embodiment will be omitted. Only for different parts. Fig. 7 is a cross-sectional top view showing the internal structure of the operation portion 41 of the door opening device 13 for the freezing compartment door 6. In the first embodiment described above, the magnet 15 having the two poles of the N pole and the S pole is magnetized. However, in the magnet 42 of the present embodiment, the N pole and the s pole are alternately arranged along the circumferential direction of the magnet 42. The overall magnetization is 8 poles. In addition, Although not shown, However, in this embodiment, Similarly, for example, the magnetic flux changing mechanism 16 shown in the first embodiment described above is provided. With the freezer compartment, open the door button 1 2 arrow A1 The linear motion linkage in the A2 direction causes the magnet 42 to be formed in the arrow B1, Rotation in the B2 direction. -15- 200900645 When the door opening button 12 of the freezer compartment is pressed in the direction of the arrow A1, The magnet 4 2 is rotated in the direction of the arrow B 1 (1 / 4 revolution), This magnet 42 is caused to influence the change in the magnetic flux state around the reed switch 17. at this time, Since the magnet 42 is magnetized to 8 poles, the magnet 42 is intermittently changed to affect the change in the magnetic flux around the reed switch 17. The reed switch 17 repeats the ΟΝ/OFF state in response to the magnetic flux state in which the magnet 42 is intermittently changed. Output the intermittent pulse signal shown in Figure 8 (a). When the control device 26 receives the intermittent pulse signal from the reed switch 17 in conjunction with the pressing operation of the freezer door opening button 12, The door opening device 1 3 is actuated to push the freezing chamber door 6 in the opening direction to open the door. When the magnet is magnetized to 2 poles, The magnetic flux state of the magnet changes only in two states. Therefore, the signal outputted from the reed switch 17 in conjunction with the pressing operation of the freezer door opening key 1 2 forms a continuous signal as shown in Fig. 8(b). therefore, In the control device 26, in order to detect the pressing operation of the freezer door opening key 12, When the magnet is assembled in the magnet housing portion 2, It is necessary to assemble the rotational position of the magnet as a predetermined rotational position (the magnetic flux state of the magnet and the rotational position of the freezer compartment which are appropriately changed in conjunction with the pressing operation of the opening door key 12). In contrast, According to this embodiment, The magnet 42 is magnetized to 8 poles. Therefore, the rotational position of the magnet 42 is assembled in any case. When pressing the opening button 1 2 of the freezer compartment by pressing, An open pulse signal can be output from the reed switch 17 to cause the door opening device 13 to operate. therefore, The assembly work of the magnet 42 can be easily performed. Furthermore, The magnetization number of the magnet 42 is not limited to 8 poles. It can also be magnetized -16- 200900645 for multipole magnets of 4 or more poles. (Fourth Embodiment) Next, referring to Fig. 9, a fourth embodiment of the present invention will be described below. Further, the descriptions of the same portions as those of the above-described first embodiment will be described only for the different portions. Fig. 9 is a vertical plan view showing the internal structure of the operation portion 51 of the door opening device 1 for the freezing chamber door. The operation unit 51 is a freezer door opening key 52 (corresponding to an operation structure, Magnet 53, The magnetic shield mechanism 54 (corresponding to a magnetic flux change means) is constituted by a sheet switch 17 or the like. The freezer opening button 5 2 is disposed on the front end side of the closing door provided in the freezing compartment door 6 at the arrow A 1 . Move in the direction of Α2. The magnet 53 is integrally formed into a rectangular shape. The magnetization is the poles of the N pole and the pole. The magnet 53 is disposed on the rear end side (the right side in the drawing) of the accommodating portion 55 in a state where the magnetization direction thereof is substantially parallel to the front of the outer frame 7. The magnetic shield mechanism 54 is composed of a control lever 56 and a magnetic shield plate 57 (phase magnetic shield member). The control rod 56 is disposed at the end of the accommodating portion 5 5 and can be oriented toward the arrow D 1 with the rotary shaft 58 as a center. D 2 direction return The control lever 56 is provided with 56a extending in the direction of the parallel rotary shaft 58. The projection 56a is hooked with a portion 59a of the coil spring 59 through which the rotary shaft 58 is inserted. The coil spring 59 makes the control rod 56 6 toward the direction of the arrow D 2 simultaneously. By the control lever that abuts the inner surface of the freezer opening button 52, the cold section is shown. The spring part of the S-shaped face is the forward of the 9th. The -17-52 200900645 front end portion 5 6b (the left end portion in Fig. 9) for the one end of the projection causes the freezing chamber to act in the direction of the arrow A2 with the opening key. The magnetic shield plate 57 is made of, for example, a material having a magnetic shielding property (magnet such as iron). The whole form a circular arc shape. One end portion of the magnetic shield plate 57 is attached to the rear end 56c of the control lever 56 (the end on the right side in Fig. 9). When the freezer door is opened by the door opening key 5 2, when pressed in the direction of the arrow A1, At the same time as the control lever 56, the magnetic shield plate 57 is swung toward the arrow D1. that is, In conjunction with the pressing operation of the freezer opening button 52, the magnetic shield mechanism 54 is formed to allow the magnetic shield plate 57 to enter and exit between the magnet 53 and the reed switch. on the other hand, Once the pressing operation of the opening door 52 of the freezing compartment is released, The magnetic shield mechanism 54 of the control lever 56 is rotated in the direction of the arrow D2 by the urging force of the coil spring 59. Then, the freezer compartment opening key 52 is pressed toward the front end portion of the control lever 56 to return to the direction of the arrow. at this time, The magnetic shield mechanism 5 4 functions as a rotating mechanism for converting the linear motion of the freezer opening door 52 and the turning motion of the magnetic shield plate 57 to each other. and, The magnetic shield plate 57 is led by the arrow D1, D2 direction back, The magnet 53 causes the magnetic flux state on the side of the outer frame 7 to change. This, The position of the magnetic shield plate 57 is shielded by the magnetic magnetic shield plate 57 of the magnet 53 in the state where the solid line indicates the position in the ninth figure (the state in which the freezer door opening button 5 is not pressed). The magnet 53 affects the magnetic flux on the side of the outer frame 7 to completely disappear. Therefore, the reed switch 17 is in a closed state. When the force side is operated with the 17 key and the A2 key is used for the change, the pressing is -18-200900645. The state in which the magnetic shield plate 57 is in the position indicated by the broken line in Fig. 9 is operated in the state in which the door opening key 52 for the freezing compartment is operated) The magnet of the magnet 53 is shielded by the magnetic shield plate 57. The magnet 15 forms a magnetic flux that enhances the influence side. therefore, The reed switch 17 is turned on. According to this embodiment, In conjunction with the opening button 5 2 of the freezer compartment, The magnetic flux state of the crucible that changes according to the magnetic shield mechanism 54 on the side of the freezing compartment door 6, It is formed on the side of the outer frame 7 by the reed switch 丨7, Therefore, it is not necessary to expose the magnet 5 3 and the magnetic shield 5 4 to the outside of the freezing chamber door 6 on the side of the freezing compartment 6, And in the outer frame, the reed switch 17 is not formed to be exposed to the outer state of the outer frame 7, It is possible to prevent malfunction of the outer frame 7 side and the freezing compartment door 6 side due to broth or the like. The reliability of the door opening device 13 can be improved. Furthermore, Although the detailed description is omitted, But for other corpses 2b, 5 door opening device (not shown), The operation unit (the same configuration as that of the operation unit 51 described above is not shown, and the same control is performed. It can prevent malfunction caused by intrusion of soup, etc. Improve reliability. (Fifth Embodiment) Next, The fifth embodiment of the present invention will be described below with reference to the following description. In addition, the same as the above-described first embodiment, the description thereof will be omitted. Only for different parts. Fig. 1 is a plan view showing the inside of the operation portion 6 1 of the door opening device 13 for the freezing compartment door 6. (The pressurization does not cause the t-frame 17 to press the operation. Due to intrusion, 3 2 a, Show), therefore, Opening the door 1 0 figure Partially omitted cross section -19- 200900645 The operating part 6 1 is the opening button 62 for the freezer compartment (equivalent to the operating member, Door side magnet 63, Magnetic coupling mechanism 64 (corresponding to magnetic flux change means, The outer frame side magnet 65' is a push button switch 66 (corresponding to a magnetic flux detecting hand). The freezer opening button 62 is disposed on the front end side (the left side of the first drawing) of the accommodating portion provided in the freezing chamber door 6, and can be disposed at the arrow A1. A2 moves to the side. The door side magnet 63 is disposed on the guide portion 68 provided on the rear end side of the accommodating portion 67 at the arrow El, Move in the E2 direction (front and rear direction). The magnetic coupling mechanism 64 is a rod 72 that is disposed behind the inside of the freezer compartment opening key 62, and is protruded rearward. A door side control lever 74 that can rotate the center of the rotary shaft 73 is provided in the accommodating portion 67. The door side iron 63 is attached to the long hole portion provided at one end portion (the lower end portion in the figure 10) of the door side control lever. Further, the end portion (the upper end portion in Fig. 10) is combined with the rod 72. The outer frame side magnets 65 are mounted in the housing member 25, and are disposed at an arrow F1 centering on the rotating shaft 69. The front end side of the outer frame side control 70 in the F 2 direction is rotated. The outer frame side control lever 70 is formed in a state of acting toward the arrow F1 by the spring 71. The push button switch 66 is disposed behind the outer frame side lever 70 in the housing member 25 (to the right in Fig. 10). The button 66a is configured to form a pressing operation of the outer frame side control lever 70. The push button switch 66 is connected to the control device 26, The input signal is input as soon as the operation button 66a is pressed. ) ) Section 6 7 » In the case of 7 4 magnetic card return lever head -20- 200900645 When the freezer opening button 62 is pressed in the direction of arrow A1, The other end portion of the door side control lever 74 is pushed by the lever 72 to thereby move the inside of the door side magnet 63 redirection portion 68 in the direction of the arrow E1. That is, In conjunction with the pressing operation of the refrigerating door opening key 62, the magnetic coupling mechanism 64 (the lever 72 and the door side lever 74) moves the door side magnet 63 in the front and rear positions. In a state in which the door side magnet 63 adsorbs the outer frame side magnet 65 (a state indicated by a solid line in FIG. 10) and a state in which the door side magnet 63 is separated from the outer frame side magnet 65 (a state indicated by a broken line in the first drawing) ) The composition of the switch. When the door side magnet 63 moves in the direction of the arrow E1, 'the magnetic coupling between the door side magnet 63 and the outer frame side magnet 65 is weakened', whereby the outer frame side control lever 70 is biased by the spring 7 1 at the arrow F1. The direction is swivel. and, The button 66a' for operating the push button switch 66 is pressed by the frame side control lever 70. The button 6 is the switch 6 6 for outputting the ON signal. at this time, The magnetic coupling mechanism 64 functions as a conversion mechanism for converting the linear motion of the freezer opening key 62 and the linear movement of the door side magnet 63. According to this embodiment, In conjunction with the pressing operation of the refrigerating door opening key 62, The magnetic flux state of the door side magnet 63 which is changed by the magnetic coupling mechanism 64 in the freezer door 6 side is used as the outer frame 7 side by the push button switch 66. Therefore, it is not necessary to expose the door side magnet 63 and the magnetic coupling mechanism 64 to the outside of the freezing compartment door 6 on the side of the freezing compartment door 6, and, There is also no need to expose the push button switch 66 to the outer state of the outer frame 7 on the outer frame 7 side. therefore, It is possible to prevent malfunction due to intrusion of soup or the like on the outer frame 7 side and the freezer compartment door 6 side. The reliability of the door opening device 13 can be improved. -21- 200900645 Again, Although the detailed description is omitted, But for other doors 2a, 2b, 5 door opening device (not shown), The operation unit (not shown) also has the same configuration as that of the operation unit 61 described above, and performs the same control. therefore, It can prevent malfunction caused by intrusion of soup, etc. It can improve the reliability of the door opening device. The magnetic flux detecting means is not limited to the above-described push button switch 66, It is also possible to use a switch that detects the state in which the door side magnet 63 is attracted to the outer frame side magnet 65 or the separated state. (Sixth embodiment) Next, The sixth embodiment of the present invention will be described below with reference to Fig. 1 . Further, the description of the same portions as those of the first embodiment described above will be omitted. Only for different parts. Fig. 1 is a cross-sectional view showing the inside of the operation portion 81 of the door opening device 1 for the freezing chamber door 6 in a schematic manner. The operation unit 8 1 is a door opening control lever 82 (corresponding to an operating member) for the freezing compartment, Magnet 1 5 Magnetic flux changing mechanism 8 3 (corresponding to magnetic flux changing means), A reed switch 17 or the like is formed. The freezer door opening control lever 82 pivotally supports the upper side portion by the rotary shaft 85 on the front end side of the housing portion 84 provided in the freezing chamber door 6. Form an arrow Gl that can be in Figure 11 (b), A lever that rotates in the G2 direction (up and down direction) (pull the operating member). The magnetic flux changing mechanism 83 is a rack 86 that is pivoted rearward by the rotary shaft 82a inside the freezer door opening control lever 8 2 and protrudes rearward. And a pinion 24 disposed at the lower center of the magnetic -22-200900645 iron 15 and the magnet 15 is rotated. The racks 86 and pinion gears 24 are engaged with each other. When the freezer door opening lever 82 is rotated in the direction of the key G1 in the 1st (b) diagram (pulling operation), By the rack 86, the pinion gear 24 is rotated toward the key B1 in the first 1 (a) diagram. at the same time, The magnet 15 is rotated in the direction of the key B1 in the 11th (a) diagram (: i/4 turn). that is, The magnetic flux changing mechanism 83 (the rack 86 and the pinion 24) is configured to form the rotating magnet 15 in conjunction with the swing operation of the freezer door opening control lever 82. at this time, The magnetic flux changing mechanism 8 3 functions as a conversion mechanism for converting the rotary motion of the freezer opening control lever 8 2 and the rotational movement of the magnet 15 . In this embodiment, Also, on the side of the freezing compartment door 6, the magnet 15 and the magnetic flux changing mechanism 83 are not formed to expose the outer state of the freezing compartment door 6, Further, it is not necessary to form the reed switch 17 exposed to the outer state of the outer frame 7 on the outer frame 7 side. therefore, On the side of the outer frame 7 and the side of the freezer compartment 6, it is possible to prevent malfunction due to intrusion of soup or the like. The reliability of the door opening device 13 can be improved. Furthermore, Although the detailed description is omitted, But for other doors 2a, 2b, 5 door opening device (not shown), The operation unit (not shown) is formed in the same configuration as the operation unit 81 to perform the same control. Therefore, it is possible to prevent malfunction due to intrusion of a soup or the like. Improve the reliability of the door opener. In this embodiment, Each door 2a, 2b, 5, The door opening lever of 6 is -23- 200900645. The door opening control lever 82 is not limited to the vertical direction of the freezer. It can also be rotated in the left and right direction. (Seventh embodiment) Next, The seventh embodiment of the present invention will be described below with reference to Fig. 2 . In addition, The description of the same portions as those of the first embodiment will be omitted. Only for different parts. Fig. 12 is a cross-sectional view showing the inside of the operation portion 91 of the door opening device 1 for the freezing chamber door 6 in a schematic manner. The operation unit 91 is a freezer door opening button 1 2 (corresponding to an operation member), Magnet 1 5 Magnetic flux change mechanism 16 Hall IC 9 2 (corresponding to magnetic detection means). The Hall IC 92 is disposed in the housing member 25, Closing the wall portion 2 5 a of the front end side of the housing member 2 5, Thereby, a state in which the outside of the outer frame 7 is not exposed is formed. 霍尔 The Hall IC 92 switches between the on state and the off state in response to the magnet 15 affecting the change in the magnetic flux state around the Hall IC 92. In this embodiment, With the rotation of the magnet 15, When the S pole of the magnet 15 is close to the Hall IC 92 (when the N pole is far away), The Hall 1C 92 forms an open state. on the other hand, When the Hall IC 9 2 keeps the S pole of the magnet 15 away (when the N pole is close), The Hall IC 92 is in a closed state. Therefore, the state in which the door opening key 12 for the freezing chamber is not pressed (the state shown in Fig. 12) is lowered, and the Hall IC 92 is in a closed state. Pressing the operation of the freezer compartment with the door open button 1 2, The Hall IC 92 is in an open state. -24- 200900645 Hall IC 92 is connected to control device 26, The control unit 26 controls the operation of the door opening device 13 based on the signal from the Hall 1C 92. In this embodiment, Also, on the side of the freezing compartment door 6, the magnet i 5 and the magnetic flux changing mechanism 16 are not formed to be exposed to the outside of the freezing compartment door 6, Further, the Hall IC 92 is not formed to be exposed to the outside of the casing 7 on the side of the outer frame 7. therefore, On the side of the outer frame 7 and the side of the freezer compartment 6, it is possible to prevent malfunction due to intrusion of soup or the like. The reliability of the door opening device 13 can be improved. Furthermore, Although the detailed description is omitted, But for other doors 2a, 2b, 5 door opening device (not shown), The operation unit (not shown) is formed in the same configuration as the operation unit 91 to perform the same control. Therefore, it is possible to prevent malfunction due to intrusion of a soup or the like. Improve the reliability of the door opener. In each of the above embodiments, Hall 1C 92 can also be used instead of the reed switch 17. (Other Embodiments) The present invention is not limited to the above embodiments. The following deformations and expansions are also possible. As a magnetic flux detecting means, it is not limited to the reed switch 1 7 'Hall IC92, As long as the magnetic flux state of the magnet can be detected. The invention not only uses a rotary door, The pull-type door switch device ' can also be used for the door opening device for the left and right double-open doors. and, The refrigerator 1 as described above can be used not only in a refrigerator having a refrigerating function and a freezing function, but also in a refrigerating machine. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a first embodiment of the present invention. (a) is a cross-sectional upper view showing the internal structure of the operation portion of the door opening device for a refrigerator, (b) is a side view of the longitudinal section. Fig. 2 is a view showing a state different from the first figure. Figure 3 is a front view of the refrigerator. Fig. 4 is a block diagram showing the electrical configuration of the refrigerator. Fig. 5 is a view corresponding to (a) of the second embodiment of the present invention. Fig. 6 is a view corresponding to Fig. 1(a) showing a modification. Fig. 7 is a view corresponding to a third (a) diagram showing a third embodiment of the present invention. Figure 8 is a diagram showing the output signal from the reed switch. Fig. 9 is a view corresponding to Fig. 1(a) showing a fourth embodiment of the present invention. Fig. 1 is a view corresponding to Fig. 1(a) showing a fifth embodiment of the present invention. Fig. 1 is a first perspective view showing a sixth embodiment of the present invention. Fig. 12 is a view corresponding to Fig. 1(a) showing a seventh embodiment of the present invention. Fig. 13 is a longitudinal sectional side view showing the configuration of an operation portion of a conventional door opening device. -26- 200900645 [Explanation of main component symbols] In the illustration, 1 is a refrigerator; 2a, 2b, 3, 4, 5, 6 is the door; 7 is the outer frame; 1 0 a, 1 0 b, 1 1. 1 2 is the door open button. -27-