201118496 、發明說明： 【發明所屬之技術領域】 本發明是關於-種微型自動對焦鏡縣置，尤指一種 運用電流磁場為動力源來進行對焦的光學鏡頭裝置，且將 成t所需之光學祕分成H不動之兩組光學透鏡 組來達到縮小體積等功效。 【先前技術】 ，年來，在手持式電子裝置上提供數位攝像功能已成 勢。由於此類手持式電子裝置财具有體積小及電池 谷，有限等特點，所以，裝設於其上之鏡頭模組同樣必須 考量其體積大小及耗電程度。 對於數位照相機錄位攝影機*言，因為其設計上本 來就疋以照相或攝影功能為主要訴求所以於設計上可以 容忍較大H積、㈣兼財光㈣域難魏的鏡頭模 組然而，對於一些非以照相或攝影為主要功能的其他手 持式電子裝置而言，例如手機、筆記型電腦、或個人數位 助理等，其機體設計上可以容納鏡頭模組的空間有限。一 般來說’目前業界專綠置於手機、筆記型制、或個人 數位助理等手持式電子裝置上的微型鏡頭模組，其最外圍 尺寸均小於1.5cm立方。在如此微小之空間限制下，這些 微型鏡頭模組幾乎都只能具有「光學對焦」功能，很難兼 具「光學變焦」功能。換句話說，傳統常見於數位照相機 或數位攝影機上的「光學變焦」鏡頭設計，無論是在光學 設計或是機構設計上，在此類微型鏡頭模組都是無法適用 201118496 的。 目前市面上之微型鏡頭模組，大多是運用俗稱VCM (Voice Coil Motor)之電磁技術來驅動鏡片移動以達到自 動對焦的功能。請參閱圖一所示，習知之微型鏡頭模組9 係包括：-殼體91、一鏡片承載座92、複數個磁石93、 一驅動線圈94、一較小尺寸之第一鏡片95、以及一較大 尺寸之第二鏡片96。該鏡片承載座92係設置於該殼體91 中央所設之一容置空間内，該鏡片承載座92外緣設有驅 動線圈94與殼體91上所平均設置之磁石93相對應，且 於鏡片承載座92内設有相對應之第一鏡片95以及第二鏡 片96。 透過對該驅動線圈94輸入不同方向之電流進而產生 不同電磁場方向，使鏡片承載座92上所固定之磁石93 產生推斥或吸引的力量，進一步使鏡片承載座92於殼體 91之容置空間内做一轴向位移，使鏡片承載座92内之第 一鏡片95以及第二鏡片96同步移動’達到光學對焦之效 果。 該第二鏡片96係與一基板8上所連接之一影像感測 模組81相對應，由於光學成像之因素，通常第二鏡片％ 其面積比第一鏡片95較大’且皆位於鏡片承載座92之 内。所以，當進行對焦操作時，這兩鏡片95、96連同鏡 片承載座92都會一起被驅動線圈94與磁石93所產生的 電磁力所驅動。換句話說，移動鏡片承載座92所需之力 量也相對增加，所以設置於鏡片承載座92外圍之驅動線 圈94以及與驅動線圈94對應之磁石93之體積與重量也 201118496 相對增加。g此，f知之微型鏡頭模組9 電流來產續焦所需之電力.，且體積也無法進化費更多的 步減少 此外’習知微型鏡職組9於組裝過程中因摩捧所產生 界微粒’很議落在很接近於影像 感測模』81的位置’其對於影像品質將造成嚴 ， 此點也有待進一步改良。 【發明内容】 本發明之目的是在於提供_種微型自動對焦鏡頭裝 置，相較於前述習知技術，可具有「體積更小型化」、「更 省電」、且「粉塵與微粒對於影像品質之影響更 優點者。 」 為達上述之目的，本發明之微型自動對焦鏡頭裝置係 包括有：-種微型自崎焦鏡頭裝置，其定義有_中心抽 線，係包括有：一第一殼體、一第二殼體、一鏡頭承載座、 複數個磁石、以及-贿_。該第—殼體外關設有複 數侧定座分別提供該磁;5固定於其内，且内部中央處則 設有-容置空_雜置該鏡頭承載座，而該鏡頭承載座 中央則设有一可動透鏡組，並於外圍設有該驅動線圈與該 磁石保持一預設間隙該第二殼體更包括一固定透鏡組， 並與該第一殼體相結合。當該驅動線圈分別施以不同方向 之預定電流時改變磁力方向，並與所對應之該磁石間產生 不同磁性之吸附與推斥力，將該鏡頭承載座於該容置空間 内沿著一中心輛線方向進行位移對焦。 201118496 【實施方式】 ^本發明微型自動對焦鏡頭裝置於結構上的主要特 徵係將成像所需之光學系統分成一較小但可動以及一較 大但固打動的兩組光學透鏡組。並且，只有在可動的該 較小光學透鏡組上裝設有VCM電磁驅動模組，至於較大 光學透鏡組的部分則不需設置VCM電磁驅動模組。藉 此，本發明微型自動·鏡頭裝置在體積上將可相對更為 縮小’且驅動較小光學透鏡組所需之電力也相對較少更為 省電。此外，粉塵與微粒也僅會落在較大光學透鏡組上而 相對較遠離影像感測模組，所以對於影像品質之影響更輕 微。 ’ 請參閱圖二所示，為本發明微型自動對焦鏡頭裝置i 與習知微型鏡頭模組9兩者於尺寸大小上進行比較之示 意圖。如圖所示，在使用相同尺寸之第一鏡片95與第二 鏡片96的前提下，由於本發明微型自動對焦鏡頭裝置i 只有在較小光學透鏡組A上裝設有VCM電磁驅動模組， 而在較大光學透鏡組B的部分則無，所以，驅動線圈及 磁石對於外圍尺寸並不會有「累加」的效果。相對地，習 用之微型鏡頭模組9由於其驅動線圈94及磁石93是設置 於兩鏡片95、96之更外圍，所以在外圍尺寸上將會「累 加」變大。此外，也因本發明微型自動對焦鏡頭裝置工 只有在較小光學透鏡組A上裝設有VCM電磁驅動模組， 所以驅動其進行自動對焦運動所需之磁力較低，不僅相對 省電’且更可使用體積更小更輕之磁石與驅動線圈來進行 驅動。 7 201118496 為了能更清楚地描述本發明所提出之微型自動對焦 鏡頭裝置，町將齡圖式詳細綱之。 ’、’、 。月參閱圖二、圖四、圖五所示，為本發明之微型自動 對焦鏡頭I置的第—實施>卜其中，—種微型自動對焦鏡 頭裝置1，其定義有一中心軸線5〇，係包括有：一蓋體 11、一第一殼體12、一第二殼體13、一鏡頭承載座14、 一可動透鏡組15、複數個磁石16、一驅動線圈17、一第 一導電簧片18、以及-第二導電簧片19。該中心轴線5〇 係包括：一前方51以及一後方52兩軸線方向。 該蓋體11係結合於該第一殼體12之一端，而該第一 殼體12之另一端則與該第二殼體13相結合。該蓋體u 中央設有一貫穿孔111與該可動透鏡組15相對應，以提 供該可動透鏡組15擷取外界影像。該第一殼體12於外圍 則设有複數個固定座121，且於該殼體12内部中央處與 該蓋體11之間則設有一容置空間122用以容納該鏡頭承 載座14於其中。該第一殼體12上之該固定座121係為兩 組對偶型態平均設置於該第一殼體12外圍之相對位置 處’以分別提供該磁石16結合於内。該磁石16係可為雙 極充磁之磁石、以及單極充磁之磁石其中之一。 於該第二殼體13上更具有包括：一固定透鏡組158、 一濾光片132、以及一貫孔133。該第二殼體13係可供結 合於一電路板2之上，令該固定透鏡組158係透過該貫孔 133與該電路板2上所電性連接之一影像感測模組21相 對應，並位於相同之該中心轴線50上，且於該第二殼體 13並對應於該影像感測模組21上方設置有該濾光片 201118496 132 ’令影像藉由該可動透鏡組15及固定透鏡組158聚焦 後透過該濾光片132投影至該影像感測模組21之上。換 句話說，本發明之微型自動對焦鏡頭裝置的光學系統，係 由該可動透鏡組15及固定透鏡組158兩者配合來達到光 學對焦成像的功能。 並且，於該第二殼體13之週緣處係平均設有至少一 對偶之卡勾134，而相對於該第一殼體12之外緣處且配 合該對偶之卡勾134設置有至少一對偶之卡槽123，並分 別藉由該卡勾134上所凸起之一勾爪1341進一步扣住該 卡槽123上所設置之一溝槽1231，使該第二殼體13得以 緊密的與該第一殼體12相互扣合。該蓋體11與該第一殼 體12以及該第二殼體13之外圍係大致相同，在本發明之 一實施例中，該微型自動對焦鏡頭裝置i之最大寬度w 小於15mm。並且，第一殼體12與該第二殼體13之最大 尺寸大致相同，其最佳尺寸為介於5mm〜13mm之間 該鏡頭承載座14係設置於該容置空間122之内與該 第二殼體13之該固定透鏡組158相對應。於該鏡頭承載 座14外圍處纏繞有該驅動線圈17，且保持一預設間隙與 设置於該第一殼體12外圍之該固定座内所設置之該 磁石16相對應。利用輸入電流改變該驅動線圈17之磁力 線方向’導致驅動線圈17與該磁石;之間產生推斥或吸 附力。藉此，可使該鏡頭承載座14於該容置空間122内， 以該中心軸線50為準進行往前方51或往後方52軸線方 向之位移與自動對焦操作。也就是說，該複數個磁石16 及驅動線圈17實質上係構成一 VCM電磁驅動模組，可 201118496 用於產生電磁力軸_承· 組15移動。 於該鏡頭承餘財錢魏可_餘15，於該 可動透鏡組15外園設有複數個外螺牙153，並與該鏡頭 承載座14中央貫通之内緣處之複數個内螺？ ΐ4ΐ相螺 合，並與該鏡頭承載座14呈同步位移，使該可動透鏡組 15内之兩鏡>{ 151、152與該第二殼體13崎固定之該 固定透鏡組158之一鏡片位於相同之該中心軸線5〇上， 以達到精確對焦之目的。 由於該可動透鏡組15係藉由該外圍之該外螺牙153 螺合於該鏡頭承載座14内緣之該内螺牙141中，於該外 螺牙153與該内螺牙141螺合組裝的過程中難免會產^細 微之粉塵微粒，且由於粉塵微粒距離該影像感測模組21 較近時會大幅影響成像後之品質，但本發明之該影像感測 模組21因與該鏡頭承載座14間隔該固定透鏡組之原 因’故於組裝時所產主之粉塵微粒不會直接落於該影像感 測模組21之感測表面上，而只會落於該固定透鏡組158 之表面，因此距離該影像感測模組21有一相對較遠之距 離’對於成像後之影像品質影響較小也就相對提昇影像品 質。 於本發明微型自動對焦鏡頭裝置1之一第一實施例 中’該可動透鏡組15係包括有：一第一鏡片151以及一 第二鏡片152。該第二鏡片152係位於該第一鏡片151及 該固定透鏡組158之間，而該固定透鏡組158所包含之單 一鏡片面積A3係大於該第二鏡片152,且該第二鏡片152 201118496 之面積A2係大於該第一鏡片151之面積A1 (A3>A2> A1)。由於在具有最大鏡片面積A3之固定透鏡組158的 外圍不需設置任何磁石或線圈，因此，該固定透鏡組158 之直徑D3與本發明微型自動對焦鏡頭裝置1之最大寬度 W (也就是第二殼體之最大寬度）兩者的比例將可提高到 0.8以上（亦即，D3/W>0.8)。此外，於本實施例中，鏡 頭承载座14包含纏繞其上之驅動線圈π的整體外圍直徑 (或寬度）係略小於或是接近該固定透鏡組158之直徑 D3。 該磁石16其包括有：一上表面161以及一下表面162 且分別具有不同的極性(N極或S極）。各別之該磁石16 係可以相同之該下表面162極性（N極或S極）平均嵌附 且固定於該鏡頭承載座14外圍之該固定座121内，同時 使該上表面161亦呈相同的極性(N極或s極)排列。該各 別之該磁石16之該下表面162係分別與該鏡頭承載座14 上之該驅動線圈17保持一預設距離，並以該下表面M2 所預設之磁性（N極或S極）與纏繞於該鏡頭承載座14 上之該驅動線圈17進行磁力之吸附或推斥。 該第一導電簧片18係透過該蓋體^夾合於該第一殼 體12之上’而該第二導電簧片19則炎合於該第一殼體 12及該第二殼體13之間。於本發明中，該第一導電簧片 18與該第二導電簧# 19係為導電金屬>1，且分別將該鏡 頭承載座14兩側彈性夾合於該第一殼體12之該容置空間 122内，而該第—導電簧片18以及該第二導電簧片^係 分別延伸至少-導腳181、191以提供正、負極電源輸二 11 201118496 並同時與魏動_ π進行導電連接，進岐變該驅動 線圈17之磁場方向，進一步使該鏡頭承载座14於該第一 设體12之該容置空間122崎行往前方51或往後方％ 之軸向位移對焦。 以下所述之本綱其他較佳實糊_，目大部份的元 件係相同或類似於前述實施例，故相同之元件與結構以下 將不再贅述，且相同之元件將直接給予相同之名稱及編 號’並對於_之元_給予_謂但在原編號後另增 加一英文字母以資區別且不予贅述，合先敘明。 請參閱圖六、圖七所示，為本發明微型自動對焦鏡頭 裝置之第二實_。其中，本發日月之第二較佳實施例的微 型自動對焦鏡頭裝置la與前述第一實施例之不同點在 於，於圖六與圖七所示之第二實施例中，該可動透鏡組 15a内僅設置-第-鏡片151a’進而令該可動透鏡組^ 所裝設之該鏡頭承載座14a的重量更為輕盈，使該微型自 動對焦綱裝置la於對焦工作時貞織輕也就更加的省 電。 另外’於該第二殼體13a上之該固定透鏡組則設置有 兩片鏡片155a及158a，這兩片鏡片155a及15如都是設 置於第一殼體13a上而固定不動。利用該可動透鏡組15a 内之該第一鏡片151a經由固定透鏡組之兩鏡片及 158a進行對焦進而透過該濾光片132&而投影至該基板2 上所s又之該影像感測模組21上。該兩鏡片155a、158a隻 直經大致相同。 請參閱圖八所示，其中，本發明之第三較佳實施例的 12 201118496 微型自動對焦鏡頭裝置lb與前述之第—與第二實施例的 不同點在於，該第一殼體12b係結合於基板2上，令該容 置空間憎容置的該鏡頭承載座14b之該可動透鏡組说 與該影像感測模組21相對應，並位於同一中心軸線5〇 之上，同時使該第二殼體13b朝向該申心軸線之前方 51，以該第二殼體i3b内之該固定透鏡組15肋作為外界 影像第一擷取之鏡片。.也就是說，於圖八所示之本發明第 二實施例中，可動透鏡組和固定透鏡組的設置位置是和第 一與第二實施例顛倒。 唯以上所述之實施例不應用於限制本發明之可應用 範圍’本發明之保護範圍應以本發明之申請專利範圍内容 所界定技術精神及其均等變化所含括之範圍為主者。即大 凡依本發明申請專利範圍所做之均等變化及修飾，仍將不 失本發明之要義所在’亦不脫離本發明之精神和範圍，故 ^ 都應視為本發明的進一步實施狀況。 【圖式簡單說明】 圖一為習知微型鏡頭模組之結構示意圖。 圖二為本發明微型自動對焦鏡頭裝置與圖一所示之 習知微型鏡頭模組兩者於尺寸大小上進行比較 之示意圖。 圖三係為本發明微型自動對焦鏡頭裝置之第一實施 例的立體分解圖。 圖四係為本發明微型自動對焦鏡頭裝置之第一實施 例的部分組合圖》 13 201118496 圖五係為本發明微型自動對焦鏡頭裝置之第一實施 例的分解剖視圖。 圖六係為本發明微型自動對焦鏡頭裝置第二較佳實 施例之立體分解圖。 圖七係為本發明微型自動對焦鏡頭裝置第二較佳實 施例之部分組合圖。 圖八係為本發明微型自動對焦鏡頭裝置第三較佳實 施例之結構示意圖。 【主要元件符號說明】 92〜鏡片承載座 94〜驅動線圈 96〜第二鏡片 9〜習知微型鏡頭模組 91〜殼體 93〜磁石 95〜第一鏡片 8〜基板 81〜影像感測模組 1、la、lb〜微型自動對焦鏡頭裝置 111〜貫穿孔 121〜固定座 123〜卡槽 13、13a、13b- 134〜-^勾 155a〜第二鏡片 第二殼體 11〜蓋體 12、12b〜第一殼體 122〜容置空間 1231〜溝槽 132、132a〜濾光片 133〜貫孔 1341〜勾爪 14、14a、14b〜鏡頭承載座 141〜内螺牙 201118496 15、15a、15b〜可動透鏡組 151、151a〜第一鏡片 152〜第二鏡片 153〜外螺牙 158、158a、158b〜固定透鏡組 16〜磁石201118496, the invention description: [Technical field of the invention] The present invention relates to a micro-autofocus lens county, especially an optical lens device that uses a current magnetic field as a power source for focusing, and the optical required for t The secret is divided into two sets of optical lens groups that do not move to achieve the effect of reducing the volume. [Prior Art] In the past years, the provision of digital camera functions on handheld electronic devices has become a trend. Because such handheld electronic devices have the characteristics of small size, limited battery, and the like, the lens module mounted thereon must also consider its size and power consumption. For the digital camera video camera*, because the design is originally based on photography or photography functions, it is designed to tolerate a large H-product, (4) and Caiguang (4) domain difficult Wei lens module. For other handheld electronic devices that are not primarily used for photography or photography, such as cell phones, notebook computers, or personal digital assistants, the space in which the lens module can accommodate the lens module is limited. In general, the miniature lens modules currently available on hand-held electronic devices such as mobile phones, notebooks, or personal digital assistants have a peripheral size of less than 1.5 cm. With such a small space limitation, these miniature lens modules can only have an "optical focus" function, and it is difficult to have an "optical zoom" function. In other words, the “optical zoom” lens design that is traditionally used in digital cameras or digital cameras cannot be applied to such miniature lens modules in optical design or mechanical design. At present, the miniature lens modules on the market mostly use the electromagnetic technology commonly known as VCM (Voice Coil Motor) to drive the lens movement to achieve the function of autofocus. Referring to FIG. 1, the conventional micro lens module 9 includes: a housing 91, a lens carrier 92, a plurality of magnets 93, a driving coil 94, a first lens 95 of a smaller size, and a first lens. A second lens 96 of a larger size. The lens carrier 92 is disposed in an accommodating space disposed in the center of the housing 91. The outer edge of the lens carrier 92 is provided with a driving coil 94 corresponding to the magnet 93 disposed on the housing 91, and A corresponding first lens 95 and second lens 96 are disposed in the lens carrier 92. By inputting currents in different directions to the driving coil 94 to generate different electromagnetic field directions, the magnet 93 fixed on the lens carrier 92 generates a force of repulsion or attraction, and further the lens carrier 92 is accommodated in the housing 91. An axial displacement is made to synchronously move the first lens 95 and the second lens 96 in the lens carrier 92 to achieve the effect of optical focusing. The second lens 96 corresponds to an image sensing module 81 connected to a substrate 8. Due to optical imaging factors, the second lens is generally larger than the first lens 95 and is located in the lens carrier. Inside the seat 92. Therefore, when the focusing operation is performed, the two lenses 95, 96 together with the lens carrier 92 are driven together by the electromagnetic force generated by the driving coil 94 and the magnet 93. In other words, the amount of force required to move the lens holder 92 is relatively increased, so that the size and weight of the drive coil 94 disposed on the periphery of the lens holder 92 and the magnet 93 corresponding to the drive coil 94 are also relatively increased. g, this knows the power of the micro lens module 9 current to produce the refocusing, and the volume can not evolve more steps to reduce the addition of the 'native micro-mirror group 9 in the assembly process due to the friction The boundary particle 'is very close to the position of the image sensing mode 81', which will cause strictness to the image quality, and this point needs further improvement. SUMMARY OF THE INVENTION An object of the present invention is to provide a micro-autofocus lens device that can have "more compact size", "more power saving", and "dust and particles for image quality" than the prior art. For the above purpose, the micro autofocus lens device of the present invention comprises: a micro-self-subsidiary lens device, which defines a central drawing line, and includes: a first shell Body, a second housing, a lens carrier, a plurality of magnets, and a bribe. The first housing is provided with a plurality of side seats respectively for providing the magnetic; 5 is fixed therein, and the inner center is provided with a space for vacating the lens carrier, and the lens carrier is centrally disposed. There is a movable lens group, and the driving coil is disposed at a periphery to maintain a predetermined gap with the magnet. The second housing further includes a fixed lens group and is combined with the first housing. When the driving coils are respectively applied with predetermined currents in different directions, the direction of the magnetic force is changed, and different magnetic adsorption and repulsive forces are generated between the driving coils, and the lens carrier is located along the center in the accommodating space. Displacement focus in the line direction. 201118496 [Embodiment] The main feature of the micro-autofocus lens device of the present invention is that the optical system required for imaging is divided into a small but movable and a large but solid-moving two-group optical lens group. Moreover, the VCM electromagnetic drive module is only mounted on the movable smaller optical lens group, and the VCM electromagnetic drive module is not required in the portion of the larger optical lens group. As a result, the micro-automatic lens device of the present invention can be relatively more compact in size' and the power required to drive the smaller optical lens group is relatively less and more power efficient. In addition, dust and particles can only fall on the larger optical lens group and are farther away from the image sensing module, so the impact on image quality is less severe. Referring to FIG. 2, the size of the micro autofocus lens device i of the present invention and the conventional micro lens module 9 are compared. As shown in the figure, under the premise of using the first lens 95 and the second lens 96 of the same size, since the micro autofocus lens device i of the present invention only has the VCM electromagnetic driving module mounted on the smaller optical lens group A, On the other hand, the portion of the larger optical lens group B is absent, so that the drive coil and the magnet do not have an "additive" effect on the peripheral size. In contrast, the conventional micro lens module 9 is "accumulated" in size in the outer periphery because its driving coil 94 and magnet 93 are disposed on the outer periphery of the two lenses 95, 96. In addition, since the micro autofocus lens device of the present invention only has a VCM electromagnetic driving module mounted on the smaller optical lens group A, the magnetic force required to drive the autofocus motion is low, which is not only relatively power-saving and It is also possible to use a smaller and lighter magnet and a drive coil for driving. 7 201118496 In order to more clearly describe the micro-autofocus lens device proposed by the present invention, the town will be detailed in the drawing. ', ', . Referring to FIG. 2, FIG. 4, and FIG. 5, the first embodiment of the micro autofocus lens I of the present invention is a micro-autofocus lens device 1, which defines a central axis 5〇. The invention includes a cover body 11, a first housing 12, a second housing 13, a lens carrier 14, a movable lens group 15, a plurality of magnets 16, a driving coil 17, and a first conductive reed. 18, and - second conductive reed 19. The central axis 5 includes a front 51 and a rear 52 in both axial directions. The cover 11 is coupled to one end of the first housing 12, and the other end of the first housing 12 is coupled to the second housing 13. A center of the cover u is provided with a uniform through hole 111 corresponding to the movable lens group 15 to provide the movable lens group 15 for capturing an external image. The first housing 12 is provided with a plurality of fixing seats 121 at the periphery thereof, and an accommodating space 122 is disposed between the center of the housing 12 and the cover body 11 for receiving the lens carrier 14 therein. . The fixing seat 121 on the first casing 12 is disposed at a relative position of the two sets of dual states on the outer periphery of the first casing 12 to respectively provide the magnet 16 to be coupled therein. The magnet 16 series can be one of a bipolar magnetized magnet and a monopolar magnetized magnet. The second housing 13 further includes a fixed lens group 158, a filter 132, and a constant hole 133. The second housing 13 can be coupled to a circuit board 2, and the fixed lens group 158 is connected to the image sensing module 21 electrically connected to the circuit board 2 through the through hole 133. And being disposed on the same central axis 50, and disposed on the second housing 13 and corresponding to the image sensing module 21, the filter 201118496 132 ′′ for the image by the movable lens group 15 and The fixed lens group 158 is focused and projected onto the image sensing module 21 through the filter 132. In other words, the optical system of the micro autofocus lens device of the present invention is configured by the movable lens group 15 and the fixed lens group 158 to achieve optical focusing imaging. And at least one pair of even hooks 134 are disposed on the periphery of the second casing 13 , and at least one pair is provided with respect to the outer edge of the first casing 12 and the dual hooks 134 are provided The slot 123 is further fastened by one of the protrusions 1341 of the hook 134, and the groove 1231 is disposed on the slot 123, so that the second housing 13 is tightly coupled to the slot The first housings 12 are engaged with each other. The cover 11 is substantially identical to the outer periphery of the first housing 12 and the second housing 13. In one embodiment of the invention, the micro autofocus lens unit i has a maximum width w of less than 15 mm. The first housing 12 and the second housing 13 are substantially the same size, and the optimal size is between 5 mm and 13 mm. The lens carrier 14 is disposed in the housing space 122 and the first housing. The fixed lens group 158 of the two housings 13 corresponds. The drive coil 17 is wound around the periphery of the lens holder 14, and a predetermined gap is maintained corresponding to the magnet 16 disposed in the holder disposed on the periphery of the first housing 12. Changing the direction of the magnetic flux of the drive coil 17 by the input current causes a repulsion or an absorbing force to be generated between the drive coil 17 and the magnet. Thereby, the lens carrier 14 can be displaced in the accommodating space 122 by the central axis 50, and the displacement and the autofocus operation are performed in the direction of the front 51 or the rear 52 axis. That is to say, the plurality of magnets 16 and the driving coils 17 substantially constitute a VCM electromagnetic driving module, and the 201118496 can be used to generate the electromagnetic force axis _ bearing · group 15 movement. In the lens, there is a plurality of external threads 153 disposed outside the movable lens group 15 and a plurality of internal screws at the inner edge of the lens carrier 14 at the center. The ΐ4ΐ phase is screwed and displaced in synchronization with the lens carrier 14 such that the two mirrors in the movable lens group 15 > 151, 152 and the second housing 13 are fixed to the lens of the fixed lens group 158 Located on the same central axis 5〇 for precise focusing. Since the movable lens group 15 is screwed into the inner thread 141 of the inner edge of the lens carrier 14 by the outer screw 153, the outer screw 153 and the inner screw 141 are screwed together. In the process, the fine dust particles are inevitably produced, and the dust particles are closely related to the image sensing module 21, which greatly affects the quality after imaging. However, the image sensing module 21 of the present invention is associated with the lens. The reason why the carrier 14 is spaced apart from the fixed lens group is that the dust particles generated during the assembly do not directly fall on the sensing surface of the image sensing module 21, but only fall on the fixed lens group 158. The surface, therefore, has a relatively long distance from the image sensing module 21', which has a relatively small influence on the image quality after imaging, and relatively improves the image quality. In the first embodiment of the micro autofocus lens device 1 of the present invention, the movable lens group 15 includes a first lens 151 and a second lens 152. The second lens 152 is located between the first lens 151 and the fixed lens group 158, and the fixed lens group 158 includes a single lens area A3 that is larger than the second lens 152, and the second lens 152 201118496 The area A2 is larger than the area A1 of the first lens 151 (A3 > A2 > A1). Since no magnet or coil is provided on the periphery of the fixed lens group 158 having the largest lens area A3, the diameter D3 of the fixed lens group 158 and the maximum width W of the micro-autofocus lens device 1 of the present invention (that is, the second The ratio of the maximum width of the casing) can be increased to above 0.8 (i.e., D3/W > 0.8). Further, in the present embodiment, the lens carrier 14 includes an overall peripheral diameter (or width) of the drive coil π wound thereon which is slightly smaller or closer to the diameter D3 of the fixed lens group 158. The magnet 16 includes an upper surface 161 and a lower surface 162 and each having a different polarity (N pole or S pole). The magnets 16 of the same type may have the same polarity (N-pole or S-pole) of the lower surface 162 being uniformly embedded and fixed in the fixing seat 121 at the periphery of the lens holder 14, while the upper surface 161 is also the same. The polarity (N pole or s pole) is arranged. The lower surface 162 of the respective magnets 16 are respectively held at a predetermined distance from the driving coil 17 on the lens carrier 14 and magnetically preset (N-pole or S-pole) by the lower surface M2. Magnetic attraction or repulsion is performed with the drive coil 17 wound around the lens holder 14. The first conductive reed 18 is affixed to the first housing 12 through the cover body, and the second conductive reed 19 is ignited to the first housing 12 and the second housing 13 between. In the present invention, the first conductive spring 18 and the second conductive spring #19 are electrically conductive metal > 1, and the lens carrier 14 is elastically clamped to the first housing 12 respectively. In the accommodating space 122, the first conductive reed 18 and the second conductive reed extend respectively at least the leads 181 and 191 to provide positive and negative power supply 11 201118496 and simultaneously with Wei _ π The conductive connection is used to change the direction of the magnetic field of the driving coil 17, and the lens carrier 14 is further displaced in the axial direction of the accommodating space 122 of the first body 12 to the front 51 or the rear. The other components of the present invention are the same or similar to the foregoing embodiments, and the same components and structures will not be described below, and the same components will be directly given the same names. And the number 'and for the _ yuan _ give _ said but after the original number, add another English letter to distinguish and not repeat, first explain. Please refer to FIG. 6 and FIG. 7 , which is the second embodiment of the micro autofocus lens device of the present invention. The micro autofocus lens device 1a of the second preferred embodiment of the present invention differs from the first embodiment described above in the second embodiment shown in FIG. 6 and FIG. Only the -first lens 151a' is disposed in the 15a, so that the weight of the lens carrier 14a of the movable lens unit is lighter, so that the micro-autofocus device la is lighter when focusing work. Power saving. Further, the fixed lens group on the second casing 13a is provided with two lenses 155a and 158a, and both of the lenses 155a and 15 are fixedly disposed on the first casing 13a. The image sensing module 21 is projected onto the substrate 2 by the first lens 151a in the movable lens group 15a, which is focused by the two lenses of the fixed lens group and the 158a, and then transmitted through the filter 132& on. The two lenses 155a, 158a are substantially straight through each other. Please refer to FIG. 8 , wherein the 12 201118496 micro autofocus lens device 1b of the third preferred embodiment of the present invention is different from the foregoing first embodiment and the second embodiment in that the first housing 12b is coupled. On the substrate 2, the movable lens group of the lens holder 14b for accommodating the accommodating space is corresponding to the image sensing module 21, and is located on the same central axis 5〇, and at the same time The two housings 13b face the front side 51 of the center of the core, and the ribs of the fixed lens group 15 in the second housing i3b serve as the first captured lens of the external image. That is, in the second embodiment of the present invention shown in Fig. 8, the positions at which the movable lens group and the fixed lens group are disposed are reversed from those of the first and second embodiments. The above-mentioned embodiments are not intended to limit the scope of application of the present invention. The scope of the present invention is intended to be limited by the technical spirit defined by the scope of the claims of the present invention and the scope thereof. That is, the equivalents and modifications of the scope of the present invention are not to be construed as being limited to the spirit and scope of the present invention, and therefore should be considered as further implementation of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a conventional micro lens module. Fig. 2 is a schematic view showing the comparison between the size of the micro autofocus lens device of the present invention and the conventional micro lens module shown in Fig. 1. Fig. 3 is an exploded perspective view showing the first embodiment of the micro autofocus lens device of the present invention. Fig. 4 is a partial sectional view showing a first embodiment of the micro autofocus lens device of the present invention. 13 201118496 Fig. 5 is an exploded sectional view showing a first embodiment of the micro autofocus lens device of the present invention. Fig. 6 is an exploded perspective view showing a second preferred embodiment of the micro autofocus lens unit of the present invention. Figure 7 is a partial assembled view of a second preferred embodiment of the micro autofocus lens device of the present invention. Figure 8 is a schematic view showing the structure of a third preferred embodiment of the micro autofocus lens device of the present invention. [Description of main component symbols] 92 to lens carrier 94 to drive coil 96 to second lens 9 to conventional micro lens module 91 to case 93 to magnet 95 to first lens 8 to substrate 81 to image sensing module 1, la, lb ~ micro autofocus lens device 111 ~ through hole 121 ~ fixed seat 123 ~ card slot 13, 13a, 13b - 134 ~ - hook 155a ~ second lens second housing 11 ~ cover 12, 12b The first casing 122 to the accommodating space 1231, the grooves 132, 132a, the filter 133, the through hole 1341, the claws 14, 14a, 14b, the lens holder 141, the inner lens, the lens, the lens holder 141, the inner lens, the lens holder 141, the inner lens Movable lens group 151, 151a - first lens 152 ~ second lens 153 ~ outer thread 158, 158a, 158b ~ fixed lens group 16 ~ magnet
161〜上表面 17〜驅動線圈 181〜導腳 191〜導腳 21〜影像感測模組 51〜前方 162〜下表面 18〜第一導電簧片 19〜第二導電簧片 2〜基板 50〜中心轴線 52〜後方161 to upper surface 17 to drive coil 181 to guide 191 to guide 21 to image sensing module 51 to front 162 to lower surface 18 to first conductive reed 19 to second conductive reed 2 to substrate 50 to center Axis 52 to rear
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