1288257 九、發明說明： 【發明所屬之技術領域】 本發明係關於使透鏡沿其透鏡之光軸方向移動的透鏡移 動機構、具備該透鏡移動機構之成像單元及具備該成像單 元的電子機器。 【先前技術】 一般情況，光學系是由複數片的單透鏡所構成，在將單 透鏡組入光學系的情況，將複數單透鏡固定於保持框後而 依每一保持框組入或組入複數片單透鏡。在固定單透鏡之 時’一般的方法是邊進行單透鏡之光軸軸心調整邊使其固 定於保持框，在專利文獻1記載有此種技術。 另外，在照相機等的光學機器上組裝有藉由於每一保持 框沿光軸方向使組入光學系的單透鏡移動，以進行對焦或 變焦的透鏡移動機構，而專利文獻2記載有此種技術。 [專利文獻1] 曰本特開平7-20366號公報 [專利文獻2] 曰本特開平1 1 - 1 3 3 2 8 0號公報 但是，在進行光軸軸心調整時，利用朝光軸方向對單透 鏡賦以勢能，調整單透鏡的光軸軸心以使單透鏡的光軸與 感光膠片、成像元件等成爲垂直狀，但若具備如習知般的 透鏡移動機構，則單透鏡將因勢能作用力的影響而發生朝 光軸方向的移動。爲此，便有無法調整單透鏡的光軸軸心 以使其相對於感光膠片、成像元件等成爲垂直的擔憂。 1288257 【發明內容】 本發明之透鏡移動機構’其特徵爲：具備使支持保持透 鏡之保持框，以沿著上述透鏡之光軸方向能自由移動地加 以支持的導引部；朝著上述透鏡之光軸方向的一方對上述 保持框賦以勢能的賦勢部；及設置可使上述保持框沿光軸 方向移動之活動自如的操縱桿；其中，相對垂直於上述透 鏡光軸的面呈傾斜的凸輪面係形成於上述操縱桿及上述保 持框中之一的構件上，上述操縱桿及上述保持框中的另一 構件係以與上述賦勢部的勢能作用力逆向的狀態頂接於上 述凸輪面。 【實施方式】 以下，參照圖式說明本發明之較佳實施形態。 [第1實施形態] 第1圖爲組裝有本發明之透鏡移動機構所適用之實施形 態之作爲對焦機構的透鏡移動機構1 0的成像單元1的側視 圖，第2圖爲成像單元1的俯視圖。 該成像單元1具備：由複數片單透鏡所構成的透鏡單元 2 ;由透鏡單元2近形成像的固體成像元件3 ;使透鏡單元 2沿光軸移動用的透鏡移動機構1 0 ;及組裝有透鏡單元2、 固體成像元件3及透鏡移動機構1 〇之作爲固定鏡筒的殼體 7 °另外，透鏡移動機構1 0具備：支持透鏡單元2以使該 透鏡單元2可接近或離開固體成像元件3之作爲導引部的 導軌4 ;賦以勢能以使透鏡單元2可接近固體成像元件3之 ί乍爲賦勢部的彈簧5 ;及以對抗該彈簧5的勢能作用力的方 -6- 1288257 式頂接於透鏡單元2之操縱桿構件6。在此，第1圖中，圖 示殼體7的剖面，以便容易明白殼體7的內側。 殼體7係呈現爲一箱狀體，在殼體7的上面以貫穿其上 面的方式形成有圓形狀的開口部7a。在殼體7的內側且在 其底面，直線狀的導軌4係設爲立起狀態，該導軌4的一 端部係固定於殻體7的底面，導鼽4的另一端部係固定於 、 殼體7的上面。 . 在殼體7的內側底面安裝有固體成像元件3，該固體成 像元件3的受光面指向開口部7a。固體成像元件3係將進 · 行對應受光量的電信號變換的光電二極體、光電晶體等的 光電變換元件作爲畫素沿其受光面排列爲2維陣列狀者（例 如，矩陣狀或蜂窩狀）。固體成像元件3可爲具備CCD的CCD 型固體成像元件，CCD係將由光電變換元件作光電變換的 i 電信號進行電荷傳輸，也可爲具備放大器的CMOS型固體 成像元件，放大器係將由光電變換元件作光電變換的電信 號進行放大。又，導軌4係與固體成像元件3的受光面形 成爲實質上垂直狀。 _ 透鏡單元2具備：最接近於物體（被攝體）側的第1單透 鏡2a ;其次接近於物體側的第2單透鏡2b ;最接近於固體 成像元件3的第3單透鏡2c ;及保持此等單透鏡2a、2b、 · 2c之作爲移動鏡筒的保持框2d。 ^ 保持框2d係將小徑的小圓筒部與大徑的大圓筒部設爲同 心且將小圓筒部一體形成於大圓筒部的端部。在保持框2d 的內周面固定有單透鏡2a、2b、2c的外周緣，此等單透鏡 1288257 2a、2b、2c被作軸心調整後固定於保持框2d，具體而言， 單透鏡2a、2b、2c的任一光軸均與保持框2d的中心線形 成爲一致。又，在保持框2d的內側還可設置具有規定此等 單透鏡2a、2b、2c全體的焦距編號的開口部的光圈板。 在保持框2d的外周面設有延出部2e，其與保持框2d形 成爲一體，該延出部2e係相對保持框2d的中心線垂直延 長。在從延出部2e的基端至突端間的中間部，形成有與保 持框2d的中心軸呈平行的貫穿孔2f。在該貫穿孔2f內可 滑動自如地插入上述導軌4,藉此，透鏡單元2全體係由導 軌4所導引而相對固體成像元件3形成爲可接近或分離自 如。 導軌4的橫剖面形狀係形成爲其從剖面重心至剖面外輪 廓周緣的一點的距離與從剖面重心至剖面外輪廓周緣的另 一點的距離各異的形狀（例如，多角形狀、非圓形狀）。貫 穿孔2f的開口形狀與該導軌4的橫剖面形狀實質上形成爲 一致，透鏡單元2係形成爲不以導軌4的橫剖面重心爲中 心進行旋轉的構成。 在由導軌4支持透鏡單元2的狀態中，單透鏡2a、2b、 2c的光軸係於固體成像元件3的受光面的中心實質上與其 受光面形成爲垂直，並從固體成像元件3開始順序排列第3 單透鏡單元2透鏡2c、第2單透鏡2b及第1單透鏡2a。 在透鏡單元2的可移動範圍中透鏡單元2最接近於固體 成像元件3的位置，此等單透鏡2a、2b、2c全體係將與透 鏡單元2分離的指定物體面的像成像於固體成像元件3，但 1288257 單透鏡2a、2b、2c全體係形成爲全焦距狀態（參照第1B圖） 。另一方面，在透鏡單元2的可移動範圍中透鏡單元2最 離開固體成像元件3的位置，此等單透鏡2a、2b、2c全體 的被攝場域深度係形成爲較全焦距狀態的情況淺，但單透 鏡2a、2b、2c全體係將較上述指定物體面靠近透鏡單元2 的物體面的像成像於固體成像元件3，而單透鏡2a、2b、2c 全體的被攝場域深度的範圍係形成爲較全焦距狀態靠近固 體成像元件3側（參照第1 A圖）。以下之說明中，稱透鏡 單元2之可移動範圍中最靠近固體成像元件3的位置爲通 常攝影位置，而稱透鏡單元2之可移動範圍中最離開固體 成像元件3的位置爲近接攝影位置。 彈簧5的一端部係在從延出部2e的貫穿孔2 f至延出部 2e的突端間連結於延出部2e，彈簧5的另一端部係連結於 殼體7的底面。該彈簧5係以保持框2d接近於固體成像 元件3的方式，並介由延出部2e而對保持框2d賦以勢能 者。另外，在透鏡單元2位於通常攝影位置的情況，彈簧5 係處於較自然長度還要伸長的狀態，並以經常使透鏡單元2 接近於固體成像元件3的方式賦以勢能。 操縱桿構件6係配設於較延出部2e還要靠近彈簧5的勢 能賦予方向側，且從殼體7的內側延長伸出至殼體7的外 側。從處於該殼體7的內側的操縱桿構件6的一端至處於 該殼體7的外側的操縱桿構件6的另一端間的中間部，係 在較延出部2 e的突端還要於延出部2e的延出方向延長的 位置被支持於殼體7上，且形成爲繞平行於單透鏡2a、2b -9- 1288257 、2 c的光軸的軸心而可旋轉自如狀。 處於該威體7的內側的操縱桿構件6的一端上形成有凸 輪面6a。第3圖爲顯示從操縱桿構件6的旋轉半徑方向所 見操縱桿構件6的一端的圖面，凸輪面6a係在朝延出部2e 的延出方向（亦即，操縱桿構件6的長度方向）所見的情況 相對於操縱桿構件6的旋轉面傾斜。亦即，該凸輪面6a之 在第2圖之操縱桿構件6的旋轉圓周方向之逆時針旋轉側 ，相對操縱桿構件6的旋轉面形成爲增高，而於旋轉圓周 方向之順時針旋轉側，相對操縱桿構件6的旋轉面形成爲 大致等高。又，操縱桿構件6的旋轉軸心與單透鏡2a、2b 、2c的光軸成爲平行，因此操縱桿構件6的旋轉面與單透 鏡2a、2b、2c的光軸成爲垂直。 如第1圖〜第3圖所示，上述延出部2e的突端部頂接於 該凸輪面6a，由該凸輪面6a承受彈簧5的勢能作用力，且 以對抗彈簧5的勢能作用力的方式而由該凸輪面6a支持上 述延出部2e的突端部。 另外，操縱桿構件6的可旋轉範圍，係藉由未圖示的限 制機構（例如，可頂接於操縱桿構件6的止動部），制約於 從延出部2 e頂接於操縱桿構件6的旋轉圓周方向之逆時針 旋轉側的凸輪面6a端部的第1部位處，至延出部2e頂接 於旋轉圓周方向之順時針旋轉側的凸輪面6a端部的第2部 位處內。 其次，說明如上述般構成的成像單元1的使用方法及成 像單元1的作用。 -10- 1288257 首先，當使用者按逆時針方向旋轉操縱桿構件6時，延 出部2e依靠彈簧5的勢能作用力，以頂接於凸輪面6a的 狀態沿著該凸輪面6a並相對凸輪面6a滑動，透鏡單元2 則伴隨此動作朝靠近固體成像元件3的方向移動。然後， 如第3圖中二點虛線所示，延出部2e與凸輪面6a的頂接 位置成爲操縱桿構件6的旋轉圓周方向之順時針旋轉側的 最低的第2部位處，於是如第1 B圖所示，透鏡單元2位於 通常攝影位置。即使透鏡單元2位於通常攝影位置，彈簧5 仍爲較自然長度伸長的狀態，由彈簧5朝讓透鏡單元2接 近固體成像元件3的方向賦以勢能，但因爲延出部2e以對 抗該勢能作用力的方式頂接於凸輪面6a上，因此透鏡單元 2之移動仍受到抑制。 在此，係由彈簧5對透鏡單元2賦以勢能的狀態，且由 凸輪面6 a承受該勢能作用力，因此，透鏡單元2之光軸係 在固體成像元件3的受光面的中心以與該受光面垂直的方 式被進行光軸軸心的調整，在此基礎上，透鏡單元2不會 晃動。另外，因爲由彈簧5朝固體成像元件3側牽拉透鏡 單元2，因此透鏡單元2不會朝離開固體成像元件3的方向 移動。 另一方面，當使用者按順時針方向旋轉操縱桿構件6時 ，延出部2e依靠彈簧5的勢能作用力，以頂接於凸輪面6a 的狀態沿著該凸輪面6a並相對凸輪面6a滑動，透鏡單元2 則伴隨此動作朝對抗彈簧5的勢能作用力而離開固體成像 元件3的方向移動。然後，如第3圖中實線所示，延出部2e -11- 1288257 與凸輪面6 a的頂接位置成爲操縱桿構件6的旋轉圓周方向 之逆時針旋轉側的最高的第1部位處，於是如第1 A圖所示 ，透鏡單元2位於近接攝影位置。即使透鏡單元2位於近 接攝影位置，仍由彈簧5朝讓透鏡單元2接近固體成像元 件3的方向賦以勢能，但因爲延出部2 e以對抗該勢能作用 力的方式頂接於凸輪面6a上，因此透鏡單元2之移動仍受 到抑制。在此，係由凸輪面6 a承受該勢能作用力，因此透 鏡單元2之光軸係在固體成像元件3的受光面的中心以與 該受光面垂直的方式被進行光軸軸心的調整，在此基礎上 ，透鏡單元2不會晃動。 如上述，本實施形態中，彈簧5的勢能作用力經常作用 於保持框2d，且凸輪面6a以對抗彈簧5的勢能作用力的方 式經常頂接於延出部2e，因此透鏡單元2不會晃動，透鏡 單元2之光軸在固體成像元件3的受光面的中心以與該受 光面垂直的方式進行光軸軸心的調整。另外，該成像單元1 係組入有透鏡單元2、透鏡移動機構1 0及固體成像元件3 者，因此該成像單元1作爲在成像之同時還可攝影的裝置 ，可設計爲較小型。另外，在成像單元1之製造時，在對 單透鏡2a、2b、2c進行光軸軸心的調整時，雖將單透鏡2a 、2b、2c壓向固體成像元件3,但因爲該按壓時的荷重由 凸輪面6a所承受，因此保持框2d不會晃動。 [第2實施形態] 在上述第1實施形態中，透鏡單元2的可移動範圍係在 通常攝影位置至近接攝影位置間，而第2實施形態中，如 -12- 1288257 第4圖所示，透鏡單元2的可移動範圍可較第1實施形態 的情況擴至更爲廣範圍的固體成像元件3側。在此，第4 圖爲顯示第2實施形態之成像單元1 〇 1的局部剖開的側視 圖。以下，參照第4圖說明成像單元1 0 1，在成像單元1 01 中’對與第1實施形態之成像單元1的任一部分相同的部 分則賦予相同的元件符號，並省略相同部分的相關說明。 如第4圖 A所示，在透鏡單元2最爲離開固體成像元件 3的情況，與第1實施形態的情況相同成爲近接攝影位置， 如第4圖 C所示，在透鏡單元2最爲接近固體成像元件3 的情況，單透鏡2a、2b、2c全體的物體面變得無限遠之同 時，單透鏡2a、2b、2c全體的成像面則成爲固體成像元件 3的受光面。亦即，在透鏡單元2最爲接近固體成像元件3 的情況，從單透鏡2a、2b、2c全體的像側主面至固體成像 元件3的受光面的距離，與單透鏡2a、2b、2c全體的像側 焦點距離大致一致。又，第2實施形態中，稱透鏡單元2 之可移動範圍中最爲接近固體成像元件3的位置爲無限遠 攝影位置。另外，即使設定透鏡單元2係位於無限遠攝影 位置處者，彈簧5仍爲較自然長度還要伸長的狀態，彈簧5 的勢能作用力朝使透鏡單元2接近於固體成像元件3的方 向進行作用。 另外，如第4B圖所示，在透鏡單元2位於從無限遠攝影 位置至近接攝影位置間的指定位置的情況，與第1實施形 態的情況相同成爲通常攝影位置，單透鏡2a、2b、2c全體 成爲全焦距狀態。 -13- 1288257 另外，伴隨著透鏡單元2的可移動範圍較第1實施形態 的情況擴至更爲廣範圍的固體成像元件3側，操縱桿構件6 的可旋轉範圍也較第1實施形態的情況擴至周方向的更廣 範圍，同時，凸輪面6a的範圍也擴至周方向的更廣範圍。 說明第2實施形態的成像單元1 01的作用及使用方法， 使操縱桿構件6沿順時針方向旋轉，如第5圖之實線所示 ， ，延出部2e與凸輪面6a的頂接位置，係成爲操縱桿構件6 . 的旋轉圓周方向之逆時針旋轉側的最高部位處，透鏡單元2 位於近接攝影位置。 Φ 於是，當使用者按逆時針方向旋轉操縱桿構件6時，如 第5圖之一點虛線所示，延出部2e與凸輪面6a的頂接位 置成爲最高部位及最低部位間的指定位置，透鏡單元2位 於通常攝影位置。 < ' 當使用者進一步按逆時針方向旋轉操縱桿構件6時，如 第5圖之二點虛線所示，延出部2e與凸輪面6a的頂接位 置成爲最低部位，透鏡單元2位於無限遠攝影位置。 無論透鏡單元2位於近接攝影位置、通常攝影位置、無 ® 限遠攝影位置的任一位置，均由彈簧5朝讓透鏡單元2接 近固體成像元件3的方向賦以勢能，同時，延出部2e以對 抗該勢能作用力的方式頂接於凸輪面6a上，因此透鏡單元 ' 2不會晃動，且透鏡單元2之光軸係在固體成像元件3的受 ’ 光面的中心以與該受光面垂直的方式進行光軸軸心的調整 。另外，在成像單元1 〇 1之製造時的軸心調整步驟中，雖 將單透鏡2a、2b、2c壓向固體成像元件3，但因爲該按壓 -14- 1288257 時的荷重由凸輪面6a所承受，因此保持框2d不會晃動。 [第3實施形態] 在上述第1實施形態中，彈簧5係以讓透鏡單元2接近 於固體成像元件3的方式賦以勢能，且以配置於較延出部2e 靠近固體成像元件3側的狀態使凸輪面6a頂接於延出部2e 。相對於此，第3實施形態中，如第6圖所示，彈簧5係 以讓透鏡單元2離開固體成像元件3的方式賦以勢能，且 以配置於較延出部2e離開固體成像元件3側的狀態使操縱 桿構件6的凸輪面6a頂接於延出部2e。以下，參照第6圖 說明第3實施形態之成像單元1 5 1，在成像單元1 5 1中，對 與第1實施形態之成像單元1的任一部分相同的部分則賦 予相同的元件符號，並省略相同部分的相關說明。 第3實施形態之成像單元1 5 1中，彈簧5的一端部並非 連結於延出部2e，而是於第2延出部2g連結於其突端部。 彈簧5的另一端部係於殼體7的內側連結於殼體7的上面 。第2延出部2g係設爲與保持框2d成爲一體，第2延出 部2g係配設於較延出部2e靠近固體成像元件3側。彈簧5 係以讓透鏡單元2離開固體成像元件3的方式，並介由第2 延出部2g而對保持框2d賦以勢能者。 另外，延出部2e不頂接於凸輪面6a，而是由延出部2e 中形成於與固體成像元件3側相反側的面上的突部2j頂接 於凸輪面6a。在此，從凸輪面6a至處於殼體7外側的操縱 桿構件6的另一端間的操縱桿構件6的中間部，係支持於 導軌4的上端，而形成爲可繞平行於單透鏡2a、2b、2c的 1288257 光軸的軸心轉動自如。另外，凸輪面6a在順時針旋轉側變 低，而於逆時針旋轉側變高。 在殻體7的內側底面，第’2導軌1 1係設成立起的狀態， 第2導軌的一端部係固定於殼體7的底面，而第2導軌的 另一端部係固定於殼體7的上面。第2導軌1 1係在與導軌 4平行的狀態配置在與導軌4不同的位置處。而且在保持框 2d的外周面安裝有導引支承2h，該導引支承2h係支持於 第2導軌1 1上。導引支承2h係設爲相對於第2導軌1 1可 自由滑行。藉由導軌4、1 1，設置透鏡單元2成爲可沿著導 軌4、1 1而於透鏡單元2的光軸方向移動。 另外，固體成像元件3並非固定於殼體7的內側底面， 而是固定於殼體7的外側下面。而且，於殼體7的下面形 成從殼體7的內側貫穿至外側的開口部7d，固體成像元件 3與該開口部7d相對向。透鏡單元2的光軸係通過該開口 部7d，且固體成像元件3的受光面與透鏡單元2的光軸垂 直。 以下，說明成像單元151的作用。當使用者按逆時針方 向旋轉操縱桿構件6時，延出部2e之突部2j依靠彈簧5 的勢能作用力，以頂接於凸輪面6a的狀態沿著該凸輪面6a 並相對凸輪面6a滑動，透鏡單元2則伴隨此動作從固體成 像元件3離開。然後，延出部2e之突部2j與凸輪面6a的 頂接位置成爲操縱桿構件6的旋轉圓周方向之順時針旋轉 側的最低的第2部位處，如第6A圖所示，透鏡單元2位於 近接攝影位置。即使透鏡單元2位於近接攝影位置，彈簧5 -16- 1288257 仍爲較自然長度伸長的狀態，由彈簧5 '朝讓透鏡單元2離 開固體成像元件3的方向賦以勢能，但因爲延出部2 e以對 抗該勢能作用力的方式頂接於凸輪面6 a上，因此透鏡單元 2之移動仍受到抑制。 另一方面，當使用者按順時針方向旋轉操縱桿構件6時 ，延出部2e之突部2j依靠彈簧5的勢能作用力，以頂接 於凸輪面6a的狀態沿著該凸輪面6a並相對凸輪面6a滑動 ，透鏡單元2則伴隨此動作朝對抗彈簧5的勢能作用力而 接近固體成像元件3的方向移動。然後，延出部2e之突部 2j與凸輪面6a的頂接位置成爲操縱桿構件6的旋轉圓周方 向之逆時針旋轉側的最高的第1部位處，於是如第6B圖所 示，透鏡單元2位於通常攝影位置。即使透鏡單元2位於 通常攝影位置，仍由彈簧5朝讓透鏡單元2離開固體成像 元件3的方向賦以勢能，但因爲延出部2e以對抗該勢能作 用力的方式頂接於凸輪面6a上，因此透鏡單元2之移動仍 受到抑制。 第3實施形態中，因爲由凸輪面6a承受彈簧5的勢能作 用力，因此，透鏡單元2之光軸係在固體成像元件3的受 光面的中心以與該受光面垂直的方式進行光軸軸心的調整 ，在此基礎上，透鏡單元2不會晃動。另外，在成像單元151 之製造時，雖在藉由吸引機等朝從固體成像元件3離開的 方向吸引透鏡單元2的狀態，使透鏡單元2位於通常攝影 位置，藉由調整固體成像元件3的安裝位置’以進行透鏡 單元2的軸心調整及焦點調整，但該吸引時的荷重由凸輪 -17- 1288257 面6a所承受，因此保持框2d不會晃動。 [應用例] 若將如上述的成像單元1、1 〇 1、1 5 1組裝於筆記型電腦 、行動電話、行動終端、電子辭典裝置、PDA(個人數位助 理）、電子記事簿裝置、數位相機、印表機及其他的電子機 器上，便可提供附有照相功能的電子機器。 例如，第7圖爲顯示組裝有成像單元1、成像單元1 01 或成像單元151中之任一者的行動電話201的前視圖。該 行動電話201係介由鉸鏈204而將下框體20 3可轉動地連 結於上框體202上的摺疊式行動電話。該上框體202上還 內建有成像單元1、成像單元1〇1或成像單元151，透鏡單 元2係面對著形成於上框體202上的開口窗。另外，操縱 桿構件6的前端部係從上框體202突出於外側，並可由使 用者操作該操縱桿構件6。另外，在上框體202、下框體203 等設有快門鍵，當使用者按下快門鍵時，固體成像元件3 即開始作動，並由該固體成像元件3取得影像。 第8圖爲顯示組裝有成像單元1、成像單元1 0 1或成像 單元151中之任一者之數位相機301的立體圖。該數位相 機301的框體302上內建有成像單元1、成像單元101或成 像單元1 5 1，透鏡單元2係面對著形成於框體302上的開口 窗。另外，操縱桿構件6的前端部係從框體3 02突出於外 側。另外，在框體3 02的上面設有導通-截止數位相機301 的電源用的電源開關303及於數位相機301進行成像動作 用的快門鍵3 04，當使用者利用電源開關303，以導通數位 -18- 1288257 相機301的狀態按下快門鍵304時，固體成像元件3即開 始作動，並取得影像。另外，在框體302的正面設有閃光 器3 05及取景器3 06。 又，本發明並不侷限於上述各實施形態、各應用例，只 要在未超出本發明之實質範圍內，即可進行各種的改良及 設計變更。 上述各實施形態中，透鏡移動機構1 0係通過使單透鏡2a 、2b、2c全體沿光軸方向移動以進行對焦。相對於此，藉 由使單透鏡2a、2b、2c中的任一透鏡固定，而使其他的透 鏡沿光軸方向移動，也可以作爲使單透鏡2a、2b、2c全體 的焦點距離變化的對焦機構。例如，可將單透鏡2a從保持 框2d獨立而固定於殼體7上，將單透鏡2b、2c固定於保 持框2d上，支持保持框2d使其可與單透鏡2b、2c —起沿 光軸方向自由移動於導軌4上。該情況，也與上述實施形 態之情況相同，保持框2 d係由彈簧5而賦以勢能作用，凸 輪面6 a以對抗彈簧5的勢能作用力的方式頂接於延出部2 e ，因此，單透鏡2b、2c之光軸係在固體成像元件3及單透 鏡2 a的兩方進行光軸軸心的調整。在該情況，單透鏡2 a 成爲第1透鏡群，而單透鏡2b、2c成爲第2透鏡群，但即 使在二群以上的情況’只要使透鏡群沿光軸方向移動，當 勸仍可將本發明之透鏡’移動機構應用於欲移動的透鏡群。 另外’上述實施形態中’凸輪面6a係形成於操縱桿構件 6上，但也可將相對垂直於單透鏡2a、2b、2c的光軸的面 呈傾斜的凸輪面形成於保持框2 d(包含延出部2e)上。該情 -19- 1288257 況，以操縱桿構件6的突端對抗彈簧5的勢能作用力的方 式頂接於保持框2 d的凸輪面’只要旋轉操縱桿構件6便 可使透鏡單元2沿光軸方向移動。 另外，上述實施形態中，彈簧5爲拉伸彈簧，也可取代 彈簧5而設置壓迫使透鏡單元2接近於固體成像單元3的 壓縮彈簧（第1實施形態、第2實施形態的情況），也可取 代彈簧5而設置壓迫使透鏡單元2從固體成像單元離開的 壓縮彈簧（第3實施形態的情況）。在第1實施形態及第2 實施形態中應用壓縮彈簧的情況，將壓縮彈簧的一端部連 結於延出部2e，將壓縮彈簧的另一端部連結於殻體7的上 面，即使透鏡單元2係位於通常攝影位置者，壓縮彈簧仍 舊處於較自然長度壓縮的狀態。在第3實施形態中應用壓 縮彈簧的情況，將壓縮彈簧的一端部連結於第2延出部，’ 將壓縮彈簧的另一端部連結於彈簧5的底面，即使透鏡單 元2係位於近接攝影位置者，壓縮彈簧仍舊處於較自然長 度壓縮的狀態。 另外，上述實施形態中，例舉彈簧5作爲朝光軸方向對 透鏡單元2賦以勢能者，但並不侷限於彈簧5，也可爲其他 的可彈性變形的彈性構件。 另外，上述實施形態中，彈簧5係連結於延出部2e，但 也可在較導軌4靠近保持框2d側連結於保持框2d或延出 部2 e。 另外，上述實施形態中，利用轉動操縱桿構件6，使延 出部2e可相對凸輪面6a作相對的滑動，而使透鏡單元2 -20- 1288257 沿光軸方向移動。相對於此，也可利用使操縱桿構件6於 垂直於第1圖或第2圖的紙面的方向滑行，以使延出部2 e 可相對凸輪面6a作相對的滑動，而使透鏡單元2沿光軸方 向移動。除此之外，若操縱桿構件6可活動自如，藉由朝 可活動的方向移動操縱桿構件6，使延出部2e可相對凸輪 面6a作相對的滑動，而使透鏡單元2沿光軸方向移動，則 操縱桿構件6的可活動方向、凸輪面6a的形狀並無特別的 限定。但是，若藉由凸輪面6a與延出部2e的相對滑動而 使透鏡單元2沿光軸方向移動，則凸輪面6a至少需相對透 鏡單元2的光軸呈現傾斜狀。任一情況均使凸輪面6a以對 抗彈簧5的勢能作用力的方式頂接於延出部2e。 【圖式簡單說明】 第1 A圖爲顯示近接攝影狀態之成像單元1的側視圖。 第1 B圖爲顯示通常攝影狀態之成像單元1的側視圖。 第2圖爲顯示第1圖所示成像單元1的俯視圖。 第3圖爲顯示第1圖所示成像單元1所具備的操縱桿構 件6的圖面。 第4A圖爲顯示近接攝影狀態之另一成像單元1 0 1的側視 圖。 第4B圖爲顯示通常攝影狀態之成像單元1〇1的側視圖。 第4C圖爲顯示無限遠攝影狀態之成像單元1 0 1的側視圖 第5圖爲顯示第4圖所示成像單元1 0 1所具備的操縱桿 構件6的圖面。 -21- 1288257 第6 A圖爲顯示近接攝影狀態之成像單元1 5 1的側視圖。 第6B圖爲顯示通常攝影狀態之另一成像單元1 5 1的側視 圖。 第7圖爲顯示組裝有成像單元 單元1 5 1之行動電話的前視圖。 第8圖爲顯示組裝有成像單元 單元151之數位相機的立體圖。 (元件符號說 明 ) 1 成 像 單 元 2 透 鏡 單 元 2a 第 1 單 透 鏡 2b 第 2 單 透 鏡 2c 第 3 單 透 鏡 2d 保 持 框 2e 延 出 部 2f 貫 穿 孔 2g 第 2 延 出 部 2h 導 引 支 承 2j 延 出 部 之 突 部 3 固 體 成 像 元 件 4 導 軌 5 彈 簧 6 操 縱 桿 構 件 1、成像單元1 01或成像 1、成像單元1 0 1或成像 · -22- 凸輪面 殼體 開口部 開口部 透鏡移動機構 第2導軌 成像單元 成像單元 行動電話 上框體 下框體 鉸鏈 數位相機 框體 電源開關 快門鍵 閃光器 取景器 -23-[Technical Field] The present invention relates to a lens moving mechanism that moves a lens in the optical axis direction of a lens thereof, an image forming unit including the lens moving mechanism, and an electronic apparatus including the image forming unit. [Prior Art] In general, an optical system is composed of a plurality of single lenses. When a single lens is incorporated into an optical system, a plurality of single lenses are fixed to a holding frame and incorporated or incorporated in each holding frame. Multiple single lenses. In the case of fixing a single lens, a general method is to fix the optical axis of a single lens while fixing it to a holding frame. This technique is described in Patent Document 1. Further, a lens moving mechanism that moves a single lens incorporated in an optical system in the optical axis direction to perform focusing or zooming is incorporated in an optical device such as a camera, and Patent Document 2 describes such a technique. . [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei 7-20366 (Patent Document 2) Japanese Patent Laid-Open Publication No. Hei No. 1 1 - 1 3 3 2 8 0 However, when the optical axis is adjusted, the direction of the optical axis is used. The potential energy of the single lens is adjusted, and the optical axis of the single lens is adjusted so that the optical axis of the single lens is perpendicular to the photosensitive film, the imaging element, etc., but if a lens moving mechanism as in the prior art is provided, the single lens will be The movement in the direction of the optical axis occurs due to the influence of the potential energy. For this reason, there is a concern that the optical axis axis of the single lens cannot be adjusted so as to be perpendicular to the photographic film, the imaging element, and the like. 1288257 SUMMARY OF THE INVENTION A lens moving mechanism of the present invention is characterized in that: a guide portion that supports a holding lens and supports a holding frame to be movably supported along an optical axis direction of the lens; a biasing portion that imparts potential energy to the holding frame in one of the optical axis directions; and a movable lever that can move the holding frame in the optical axis direction; wherein the surface perpendicular to the optical axis of the lens is inclined a cam surface is formed on a member of the lever and the holding frame, and the lever and the other member of the holding frame are in contact with the cam in a state opposite to a potential energy of the armature surface. [Embodiment] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. [First Embodiment] Fig. 1 is a side view showing an image forming unit 1 of a lens moving mechanism 10 as a focusing mechanism in an embodiment to which a lens moving mechanism of the present invention is applied, and Fig. 2 is a plan view of the image forming unit 1. . The imaging unit 1 includes a lens unit 2 composed of a plurality of single lenses, a solid imaging element 3 formed by the lens unit 2 in close proximity, a lens moving mechanism 10 for moving the lens unit 2 along the optical axis, and an assembly The lens unit 2, the solid-state imaging element 3, and the lens shifting mechanism 1 are used as a housing for fixing the lens barrel. Further, the lens shifting mechanism 10 is provided with a lens unit 2 for supporting the lens unit 2 to approach or leave the solid-state imaging element. a guide rail 4 as a guide portion; a spring 5 to which the potential energy is applied so that the lens unit 2 can approach the solid imaging element 3 as a potential portion; and a square -6- against the potential energy of the spring 5 1288257 is attached to the lever member 6 of the lens unit 2. Here, in Fig. 1, a cross section of the casing 7 is shown so that the inside of the casing 7 can be easily understood. The casing 7 is formed as a box-like body, and a circular opening portion 7a is formed on the upper surface of the casing 7 so as to penetrate the upper surface thereof. On the inner side of the casing 7 and on the bottom surface thereof, the linear guide rail 4 is in an upright state, and one end portion of the guide rail 4 is fixed to the bottom surface of the casing 7, and the other end portion of the guide bush 4 is fixed to the casing. Above the body 7. A solid image forming element 3 is attached to the inner bottom surface of the casing 7, and the light receiving surface of the solid image forming element 3 is directed to the opening portion 7a. The solid-state imaging device 3 is a photoelectric conversion element such as a photodiode or a photoelectric crystal that converts electric signals corresponding to the amount of received light into a two-dimensional array along the light receiving surface (for example, a matrix or a honeycomb). shape). The solid state imaging device 3 may be a CCD type solid state imaging device having a CCD, and the CCD system may perform charge transfer by an i-electric signal photoelectrically converted by the photoelectric conversion element, or may be a CMOS solid imaging element having an amplifier, and the amplifier system will be composed of a photoelectric conversion element. The photoelectrically converted electrical signal is amplified. Further, the guide rail 4 is formed to be substantially perpendicular to the light receiving surface of the solid state imaging device 3. The lens unit 2 includes a first single lens 2a closest to the object (subject) side, a second single lens 2b closer to the object side, and a third single lens 2c closest to the solid imaging element 3; The holding frames 2d that move the lens barrels of the single lenses 2a, 2b, and 2c are held. In the holding frame 2d, the small cylindrical portion having a small diameter is concentric with the large cylindrical portion having a large diameter, and the small cylindrical portion is integrally formed at the end portion of the large cylindrical portion. The outer peripheral edges of the single lenses 2a, 2b, 2c are fixed to the inner peripheral surface of the holding frame 2d, and the single lenses 1288257 2a, 2b, 2c are axially adjusted and fixed to the holding frame 2d, specifically, the single lens 2a. Any of the optical axes of 2b, 2c is formed to coincide with the center line of the holding frame 2d. Further, a diaphragm plate having an opening portion defining a focal length number of all of the single lenses 2a, 2b, and 2c may be provided inside the holding frame 2d. An extension portion 2e is formed on the outer peripheral surface of the holding frame 2d, and is integrally formed with the holding frame 2d, and the extension portion 2e is vertically extended with respect to the center line of the holding frame 2d. A through hole 2f parallel to the central axis of the holding frame 2d is formed in the intermediate portion between the base end and the projecting end of the extending portion 2e. The guide rail 4 is slidably inserted into the through hole 2f, whereby the entire lens unit 2 is guided by the guide rail 4 to be formed to be accessible or detachable with respect to the solid state imaging element 3. The cross-sectional shape of the guide rail 4 is formed such that the distance from the center of gravity of the section to the point of the periphery of the cross-section outer contour is different from the distance from the center of gravity of the section to the other point of the contour of the outer contour of the section (for example, a polygonal shape or a non-circular shape). . The opening shape of the through hole 2f is substantially the same as the cross-sectional shape of the guide rail 4, and the lens unit 2 is formed so as not to rotate centering on the center of gravity of the guide rail 4. In a state in which the lens unit 2 is supported by the guide rails 4, the optical axes of the single lenses 2a, 2b, 2c are substantially perpendicular to the light receiving surface of the solid imaging element 3, and are formed in the order from the solid imaging element 3. The third single lens unit 2 lens 2c, the second single lens 2b, and the first single lens 2a are arranged. In the movable range of the lens unit 2, the lens unit 2 is closest to the position of the solid imaging element 3, and these single lenses 2a, 2b, 2c form an image of the specified object plane separated from the lens unit 2 on the solid imaging element. 3, but 1288257 The single lens 2a, 2b, 2c is formed in a full focal length state (see Fig. 1B). On the other hand, in the movable range of the lens unit 2, the position at which the lens unit 2 is most separated from the solid imaging element 3, the depth of the field of the entire single lens 2a, 2b, 2c is formed to be in a more full-focus state. Shallow, but the single lens 2a, 2b, 2c system images the image of the object surface closer to the lens unit 2 than the above-mentioned specified object surface to the solid imaging element 3, and the entire field of the single lens 2a, 2b, 2c is deep. The range is formed closer to the solid imaging element 3 side than the full focal length state (refer to FIG. 1A). In the following description, the position closest to the solid-state imaging element 3 among the movable ranges of the lens unit 2 is referred to as a normal photographing position, and the position of the movable unit of the lens unit 2 which is the most distant from the solid-state imaging element 3 is referred to as a close-up photographing position. One end portion of the spring 5 is coupled to the extended portion 2e between the protruding end 2f of the extending portion 2e and the protruding end of the extending portion 2e, and the other end portion of the spring 5 is coupled to the bottom surface of the casing 7. The spring 5 is in such a manner that the holding frame 2d is close to the solid-state imaging element 3, and the holding member 2d is given potential energy via the extending portion 2e. Further, in the case where the lens unit 2 is located at the normal photographing position, the spring 5 is in a state of being elongated more than the natural length, and the potential energy is imparted in such a manner that the lens unit 2 is often brought close to the solid imaging element 3. The lever member 6 is disposed closer to the side of the potential imparting direction of the spring 5 than the extending portion 2e, and extends from the inner side of the casing 7 to the outer side of the casing 7. The intermediate portion between the end of the lever member 6 at the inner side of the housing 7 and the other end of the lever member 6 at the outer side of the housing 7 is extended at the projecting end of the extension portion 2e. The position in which the extending direction of the outlet portion 2e is extended is supported on the casing 7, and is formed to be rotatable about an axis parallel to the optical axes of the single lenses 2a, 2b-9-1288257, 2c. A cam face 6a is formed on one end of the lever member 6 on the inner side of the core 7. 3 is a view showing one end of the lever member 6 seen from the direction of the radius of rotation of the lever member 6, and the cam surface 6a is in the extending direction toward the extending portion 2e (that is, the length direction of the lever member 6). The situation seen is inclined with respect to the rotating surface of the joystick member 6. That is, the cam surface 6a is formed on the counterclockwise rotation side of the rotation circumferential direction of the lever member 6 in Fig. 2, and is formed to be increased with respect to the rotation surface of the lever member 6, and is rotated clockwise in the circumferential direction of the rotation, The rotating surface of the lever member 6 is formed to be substantially equal in height. Further, since the rotation axis of the lever member 6 is parallel to the optical axes of the single lenses 2a, 2b, 2c, the rotation surface of the lever member 6 is perpendicular to the optical axes of the single lenses 2a, 2b, 2c. As shown in FIGS. 1 to 3, the protruding end portion of the extending portion 2e is in contact with the cam surface 6a, and the cam surface 6a receives the potential energy of the spring 5 and acts against the potential energy of the spring 5. In this manner, the protruding end portion of the extending portion 2e is supported by the cam surface 6a. Further, the rotatable range of the joystick member 6 is restricted to be attached to the joystick from the extension portion 2 e by a restriction mechanism (for example, a stopper portion that can be abutted against the lever member 6) (not shown). The first portion of the end portion of the cam surface 6a on the counterclockwise rotation side of the member 6 in the circumferential direction of rotation, and the extension portion 2e are in contact with the second portion of the end portion of the cam surface 6a on the clockwise rotation side in the rotation circumferential direction Inside. Next, the method of using the image forming unit 1 configured as described above and the function of the image forming unit 1 will be described. -10- 1288257 First, when the user rotates the lever member 6 in the counterclockwise direction, the extension portion 2e relies on the potential energy of the spring 5 to abut the cam surface 6a along the cam surface 6a and oppose the cam. The surface 6a slides, and the lens unit 2 moves in the direction of approaching the solid state imaging element 3 along with this action. Then, as shown by the two-dotted line in Fig. 3, the position where the extension portion 2e and the cam surface 6a are in contact with each other becomes the lowest second portion on the clockwise rotation side of the rotation circumferential direction of the lever member 6, so that As shown in Fig. 1B, the lens unit 2 is located at a normal photographing position. Even if the lens unit 2 is in the normal photographing position, the spring 5 is still in a state of being elongated by a natural length, and the potential energy is imparted by the spring 5 toward the direction in which the lens unit 2 approaches the solid imaging element 3, but the extension portion 2e acts against the potential energy. The force is applied to the cam surface 6a so that the movement of the lens unit 2 is still suppressed. Here, the lens unit 2 is given a potential energy by the spring 5, and the potential energy is received by the cam surface 6a. Therefore, the optical axis of the lens unit 2 is at the center of the light receiving surface of the solid imaging element 3 to The optical axis is adjusted in such a manner that the light receiving surface is perpendicular, and the lens unit 2 does not shake. In addition, since the lens unit 2 is pulled toward the solid imaging element 3 side by the spring 5, the lens unit 2 does not move in a direction away from the solid state imaging element 3. On the other hand, when the user rotates the lever member 6 in the clockwise direction, the extension portion 2e relies on the potential energy of the spring 5 to abut the cam surface 6a along the cam surface 6a and the cam surface 6a. When sliding, the lens unit 2 moves in the direction away from the solid state imaging element 3 against the potential energy of the spring 5 with this action. Then, as shown by the solid line in Fig. 3, the position where the extension portion 2e -11 - 1288257 and the cam surface 6 a are in contact with each other becomes the highest first portion of the counterclockwise rotation side of the rotation circumferential direction of the lever member 6 Thus, as shown in Fig. 1A, the lens unit 2 is located at the proximity photographing position. Even if the lens unit 2 is located in the close-up photographing position, the spring 5 is biased toward the direction in which the lens unit 2 approaches the solid-state imaging element 3, but the extension portion 2 e is superposed on the cam surface 6a in a manner to counteract the potential energy. Upper, therefore the movement of the lens unit 2 is still suppressed. Here, since the potential energy is received by the cam surface 6 a, the optical axis of the lens unit 2 is adjusted at the center of the light receiving surface of the solid state imaging device 3 so as to be perpendicular to the light receiving surface, and the optical axis axis is adjusted. On this basis, the lens unit 2 does not shake. As described above, in the present embodiment, the potential energy of the spring 5 often acts on the holding frame 2d, and the cam surface 6a is often in contact with the extension portion 2e in a manner opposing the potential energy of the spring 5, so the lens unit 2 does not When the optical axis of the lens unit 2 is shaken, the optical axis axis is adjusted so that the center of the light receiving surface of the solid state imaging device 3 is perpendicular to the light receiving surface. Further, the image forming unit 1 incorporates the lens unit 2, the lens moving mechanism 10, and the solid-state imaging element 3. Therefore, the image forming unit 1 can be designed as a small type while being imageable while being imaged. Further, at the time of manufacture of the image forming unit 1, when the optical axes are adjusted for the single lenses 2a, 2b, and 2c, the single lenses 2a, 2b, and 2c are pressed against the solid imaging element 3, but since the pressing is performed The load is received by the cam surface 6a, so that the holding frame 2d does not shake. [Second Embodiment] In the first embodiment, the movable range of the lens unit 2 is between the normal imaging position and the proximity imaging position, and in the second embodiment, as shown in Fig. 4 of -12-1288257, The movable range of the lens unit 2 can be expanded to a wider range of the solid-state imaging element 3 side than in the case of the first embodiment. Here, Fig. 4 is a partially cutaway side view showing the image forming unit 1 〇 1 of the second embodiment. In the following, the imaging unit 101 is described with reference to FIG. 4, and the same components are assigned to the same portions as those of the imaging unit 1 of the first embodiment in the imaging unit 101, and the description of the same portions is omitted. . As shown in Fig. 4A, when the lens unit 2 is the most separated from the solid state imaging device 3, it is a proximity photographing position as in the case of the first embodiment, and is closest to the lens unit 2 as shown in Fig. 4C. In the case of the solid state imaging device 3, the entire surface of the single lenses 2a, 2b, and 2c becomes infinity, and the entire imaging surfaces of the single lenses 2a, 2b, and 2c become the light receiving surface of the solid imaging element 3. That is, in the case where the lens unit 2 is closest to the solid imaging element 3, the distance from the image side main surface of the entire single lens 2a, 2b, 2c to the light receiving surface of the solid imaging element 3, and the single lens 2a, 2b, 2c The overall image side focus distance is approximately the same. Further, in the second embodiment, the position closest to the solid state imaging device 3 among the movable ranges of the lens unit 2 is referred to as an infinity photographing position. Further, even if the lens unit 2 is set to be in the infinity photographing position, the spring 5 is still in a state of being elongated more than the natural length, and the potential energy of the spring 5 acts toward the direction in which the lens unit 2 is close to the solid imaging element 3. . Further, as shown in FIG. 4B, when the lens unit 2 is located at a predetermined position from the infinity photographing position to the close photographing position, the normal photographing position is the same as in the case of the first embodiment, and the single lens 2a, 2b, 2c The whole becomes a full focal length state. Further, as the movable range of the lens unit 2 is expanded to a wider range of the solid state imaging device 3 than in the first embodiment, the rotatable range of the lever member 6 is also smaller than that of the first embodiment. The situation is expanded to a wider range in the circumferential direction, and the range of the cam surface 6a is also expanded to a wider range in the circumferential direction. The operation and use method of the image forming unit 101 of the second embodiment will be described to rotate the joystick member 6 in the clockwise direction. As shown by the solid line in Fig. 5, the leading position of the extension portion 2e and the cam surface 6a is described. It is the highest position on the counterclockwise rotation side of the rotation circumferential direction of the joystick member 6. The lens unit 2 is located at the close-up photographing position. Φ Then, when the user rotates the joystick member 6 in the counterclockwise direction, as indicated by a dotted line in FIG. 5, the position where the extension portion 2e and the cam surface 6a are connected is the designated position between the highest portion and the lowest portion. The lens unit 2 is located at a normal photographing position. < ' When the user further rotates the joystick member 6 in the counterclockwise direction, as shown by the dotted line in Fig. 5, the position where the extension portion 2e and the cam surface 6a are at the lowest position, and the lens unit 2 is infinite Far photography position. Regardless of whether the lens unit 2 is located at any of the proximity photographing position, the normal photographing position, and the non-limited-range photographing position, the spring 5 is biased toward the direction in which the lens unit 2 approaches the solid imaging element 3, and at the same time, the extension portion 2e The lens unit '2 does not sway in such a manner as to oppose the potential energy, so that the optical axis of the lens unit 2 is at the center of the 'optical surface' of the solid imaging element 3 and the light receiving surface. The adjustment of the optical axis axis is performed in a vertical manner. Further, in the axial center adjusting step at the time of manufacture of the image forming unit 1 〇1, although the single lenses 2a, 2b, 2c are pressed against the solid state imaging element 3, the load at the time of pressing -14 - 1288257 is controlled by the cam surface 6a Withstand, so keep frame 2d from shaking. [Third Embodiment] In the first embodiment, the spring 5 is provided with potential energy so that the lens unit 2 is close to the solid state imaging device 3, and is disposed closer to the solid imaging element 3 side than the extension portion 2e. The state causes the cam surface 6a to be in contact with the extension 2e. On the other hand, in the third embodiment, as shown in Fig. 6, the spring 5 is provided with potential energy so that the lens unit 2 is separated from the solid imaging element 3, and is disposed apart from the solid imaging element 3 by being disposed on the extended portion 2e. The state of the side causes the cam surface 6a of the lever member 6 to abut against the extension portion 2e. Hereinafter, the imaging unit 151 of the third embodiment will be described with reference to Fig. 6. In the imaging unit 151, the same components are assigned to the same portions as those of the imaging unit 1 of the first embodiment, and The relevant description of the same part is omitted. In the image forming unit 1 51 of the third embodiment, the one end portion of the spring 5 is not connected to the extending portion 2e, but is connected to the protruding end portion at the second extending portion 2g. The other end of the spring 5 is coupled to the upper surface of the casing 7 at the inner side of the casing 7. The second extension 2g is integrated with the holding frame 2d, and the second extension 2g is disposed closer to the solid imaging element 3 side than the extension 2e. The spring 5 is configured such that the lens unit 2 is separated from the solid state imaging element 3, and the holding member 2d is given a potential energy via the second extension portion 2g. Further, the extension portion 2e is not in contact with the cam surface 6a, but the projection 2j formed on the surface on the side opposite to the solid imaging element 3 side of the extension portion 2e is in contact with the cam surface 6a. Here, the intermediate portion of the lever member 6 from the cam surface 6a to the other end of the lever member 6 outside the casing 7 is supported by the upper end of the guide rail 4, and is formed to be rotatable parallel to the single lens 2a, The axis of the 1288257 optical axis of 2b, 2c rotates freely. Further, the cam surface 6a becomes lower on the clockwise rotation side and becomes higher on the counterclockwise rotation side. On the inner bottom surface of the casing 7, the second rail 1 1 is set up, the one end of the second rail is fixed to the bottom surface of the casing 7, and the other end of the second rail is fixed to the casing 7. The top. The second rail 11 is disposed at a position different from the guide rail 4 in a state parallel to the guide rail 4. Further, a guide support 2h is attached to the outer peripheral surface of the holding frame 2d, and the guide support 2h is supported by the second guide rail 1 1. The guide support 2h is configured to be freely slidable relative to the second guide rail 1 1 . The lens unit 2 is provided by the guide rails 4, 1 1 so as to be movable in the optical axis direction of the lens unit 2 along the guide rails 4, 11. Further, the solid state imaging element 3 is not fixed to the inner bottom surface of the casing 7, but is fixed to the outer side of the casing 7. Further, an opening portion 7d penetrating from the inner side to the outer side of the casing 7 is formed on the lower surface of the casing 7, and the solid image forming element 3 faces the opening portion 7d. The optical axis of the lens unit 2 passes through the opening portion 7d, and the light receiving surface of the solid state imaging element 3 is perpendicular to the optical axis of the lens unit 2. Hereinafter, the action of the imaging unit 151 will be described. When the user rotates the lever member 6 in the counterclockwise direction, the projection 2j of the extension portion 2e depends on the potential energy of the spring 5 to abut the cam surface 6a along the cam surface 6a and against the cam surface 6a. When sliding, the lens unit 2 is separated from the solid state imaging element 3 along with this action. Then, the position where the protrusion 2j of the extension portion 2e and the cam surface 6a are at the lowest second position on the clockwise rotation side of the rotation circumferential direction of the lever member 6, as shown in FIG. 6A, the lens unit 2 Located in close proximity to the shooting position. Even if the lens unit 2 is in the close-up photographing position, the spring 5-16-1288257 is still in a state of being elongated by a natural length, and the spring 5' imparts potential energy to the direction in which the lens unit 2 leaves the solid imaging element 3, but because of the extension 2 e is superposed on the cam surface 6a in a manner opposed to the potential energy, so that the movement of the lens unit 2 is still suppressed. On the other hand, when the user rotates the lever member 6 in the clockwise direction, the projection 2j of the extension portion 2e depends on the potential energy of the spring 5 to be in the state of being in contact with the cam surface 6a along the cam surface 6a. When the cam surface 6a slides, the lens unit 2 moves in the direction of approaching the solid state imaging element 3 in response to the potential energy of the spring 5. Then, the position where the protrusion 2j of the extension portion 2e and the cam surface 6a are at the highest position on the counterclockwise rotation side of the rotation circumferential direction of the joystick member 6 is as shown in FIG. 6B. 2 is located in the usual shooting position. Even if the lens unit 2 is located at the normal photographing position, the spring 5 is biased toward the direction in which the lens unit 2 leaves the solid imaging element 3, but the extension portion 2e is attached to the cam surface 6a in such a manner as to oppose the potential energy. Therefore, the movement of the lens unit 2 is still suppressed. In the third embodiment, since the cam surface 6a receives the potential energy of the spring 5, the optical axis of the lens unit 2 is positioned at the center of the light receiving surface of the solid state imaging device 3 so as to be perpendicular to the light receiving surface. The adjustment of the heart, on the basis of this, the lens unit 2 does not shake. Further, at the time of manufacture of the image forming unit 151, the lens unit 2 is placed at a normal photographing position by the suction machine or the like in a state of attracting the lens unit 2 in a direction away from the solid state imaging element 3, by adjusting the solid imaging element 3 The mounting position 'to perform the axial center adjustment and the focus adjustment of the lens unit 2, but the load at the time of this suction is received by the cam -17-1288257 surface 6a, and the holding frame 2d does not shake. [Application example] When the imaging unit 1, 1 〇 1, 1 51 as described above is incorporated in a notebook computer, a mobile phone, a mobile terminal, an electronic dictionary device, a PDA (personal digital assistant), an electronic organizer device, a digital camera Electronic machines with camera functions are available on printers and other electronic machines. For example, FIG. 7 is a front view showing the mobile phone 201 in which any one of the imaging unit 1, the imaging unit 101, or the imaging unit 151 is assembled. The mobile phone 201 is a foldable mobile phone that rotatably connects the lower frame 20 3 to the upper frame 202 via a hinge 204. The upper housing 202 is also internally provided with an imaging unit 1, an imaging unit 101 or an imaging unit 151, and the lens unit 2 faces an opening window formed on the upper housing 202. Further, the front end portion of the lever member 6 protrudes from the upper frame body 202 on the outside, and the lever member 6 can be operated by a user. Further, a shutter button is provided on the upper housing 202, the lower housing 203, and the like, and when the user presses the shutter button, the solid imaging element 3 starts to operate, and the solid imaging element 3 acquires an image. Fig. 8 is a perspective view showing the digital camera 301 in which any one of the imaging unit 1, the imaging unit 110 or the imaging unit 151 is assembled. The frame 302 of the digital camera 301 is internally provided with an imaging unit 1, an imaging unit 101 or an imaging unit 151, and the lens unit 2 faces an opening window formed on the frame 302. Further, the front end portion of the lever member 6 protrudes from the frame body 302 from the outside. Further, a power switch 303 for turning on and off the digital camera 301 and a shutter button 309 for performing an imaging operation on the digital camera 301 are provided on the upper surface of the housing 312, and the user uses the power switch 303 to turn on the digital position. -18- 1288257 When the shutter button 304 is pressed in the state of the camera 301, the solid imaging element 3 starts to operate and acquires an image. Further, a flasher 305 and a viewfinder 306 are provided on the front surface of the casing 302. Further, the present invention is not limited to the above embodiments and the respective application examples, and various modifications and design changes can be made without departing from the spirit and scope of the invention. In each of the above embodiments, the lens shifting mechanism 10 moves the entire single lenses 2a, 2b, and 2c in the optical axis direction to perform focusing. On the other hand, by fixing one of the single lenses 2a, 2b, and 2c to move the other lenses in the optical axis direction, the focus can be changed as the focal length of the entire single lenses 2a, 2b, and 2c. mechanism. For example, the single lens 2a can be fixed to the casing 7 independently from the holding frame 2d, and the single lenses 2b, 2c can be fixed to the holding frame 2d, and the holding frame 2d can be supported to be movable along with the single lenses 2b, 2c. The axis direction is free to move on the guide rail 4. Also in this case, as in the case of the above-described embodiment, the holding frame 2d is biased by the spring 5, and the cam surface 6a is in contact with the extension portion 2e against the potential energy of the spring 5, so that The optical axes of the single lenses 2b and 2c are adjusted between the solid-state imaging element 3 and the single lens 2a to adjust the optical axis axis. In this case, the single lens 2 a is the first lens group, and the single lenses 2b and 2c are the second lens group. However, even in the case of two or more groups, the lens group can be moved in the optical axis direction. The lens 'moving mechanism of the present invention is applied to a lens group to be moved. Further, in the above-described embodiment, the "cam surface 6a" is formed on the lever member 6, but a cam surface that is inclined with respect to a plane perpendicular to the optical axes of the single lenses 2a, 2b, 2c may be formed in the holding frame 2d ( Contains the extension 2e). In the case of the -19- 1288257, the protruding end of the lever member 6 is urged against the cam surface of the holding frame 2 d against the potential energy of the spring 5 as long as the lever member 6 is rotated to move the lens unit 2 along the optical axis. Move in direction. Further, in the above-described embodiment, the spring 5 is a tension spring, and instead of the spring 5, a compression spring that presses the lens unit 2 close to the solid image forming unit 3 (in the first embodiment and the second embodiment) may be provided. Instead of the spring 5, a compression spring that presses the lens unit 2 away from the solid image forming unit can be provided (in the case of the third embodiment). In the case of applying the compression spring in the first embodiment and the second embodiment, one end portion of the compression spring is coupled to the extension portion 2e, and the other end portion of the compression spring is coupled to the upper surface of the casing 7, even if the lens unit 2 is attached. In the normal shooting position, the compression spring is still in a state of natural length compression. In the case where the compression spring is applied in the third embodiment, one end portion of the compression spring is coupled to the second extension portion, and the other end portion of the compression spring is coupled to the bottom surface of the spring 5, even if the lens unit 2 is in the close-up photographing position. The compression spring is still in a state of natural length compression. Further, in the above embodiment, the spring 5 is exemplified as a potential energy for the lens unit 2 in the optical axis direction. However, the spring 5 is not limited to the spring 5, and may be another elastically deformable elastic member. Further, in the above embodiment, the spring 5 is coupled to the extension portion 2e, but may be coupled to the holding frame 2d or the extension portion 2e on the side closer to the holding frame 2d than the guide rail 4. Further, in the above embodiment, by rotating the lever member 6, the extending portion 2e is slidable relative to the cam surface 6a, and the lens unit 2-20-1288257 is moved in the optical axis direction. On the other hand, the lever member 6 can be slid in a direction perpendicular to the plane of the paper of FIG. 1 or FIG. 2 so that the extension portion 2 e can slide relative to the cam surface 6a to cause the lens unit 2 to be slid relative to the cam surface 6a. Move in the direction of the optical axis. In addition, if the lever member 6 is freely movable, by moving the lever member 6 in the movable direction, the extension portion 2e can be relatively slid with respect to the cam surface 6a, and the lens unit 2 can be moved along the optical axis. When the direction is moved, the movable direction of the lever member 6 and the shape of the cam surface 6a are not particularly limited. However, if the lens unit 2 is moved in the optical axis direction by the relative sliding of the cam surface 6a and the extending portion 2e, the cam surface 6a needs to be at least inclined with respect to the optical axis of the lens unit 2. In either case, the cam surface 6a is brought into contact with the extension portion 2e in such a manner as to counteract the potential energy of the spring 5. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a side view showing the image forming unit 1 in a close-up photographing state. Fig. 1B is a side view showing the image forming unit 1 in a normal photographing state. Fig. 2 is a plan view showing the image forming unit 1 shown in Fig. 1. Fig. 3 is a view showing a lever member 6 provided in the image forming unit 1 shown in Fig. 1. Fig. 4A is a side view showing another imaging unit 110 of the near-photographing state. Fig. 4B is a side view showing the image forming unit 1〇1 in a normal photographing state. Fig. 4C is a side view of the image forming unit 1 0 1 showing the infinity photographing state. Fig. 5 is a view showing the lever member 6 provided in the image forming unit 101 of Fig. 4 . -21- 1288257 Fig. 6A is a side view showing the imaging unit 151 of the near-photographing state. Fig. 6B is a side view showing another imaging unit 151 of a normal photographing state. Fig. 7 is a front view showing the mobile phone in which the imaging unit unit 151 is assembled. Fig. 8 is a perspective view showing a digital camera in which the imaging unit unit 151 is assembled. (Description of component symbols) 1 Imaging unit 2 Lens unit 2a First single lens 2b Second single lens 2c Third single lens 2d Holding frame 2e Extension 2f Through hole 2g Second extension 2h Guide support 2j Extension Projection 3 Solid-state imaging element 4 Guide rail 5 Spring 6 Joystick member 1, Imaging unit 101 or Imaging 1, Imaging unit 1 0 1 or Imaging · -22- Cam surface housing opening opening lens moving mechanism second guide Imaging unit imaging unit mobile phone frame lower frame hinge digital camera frame power switch shutter button flasher viewfinder-23-