201031987 葉片彈簧82 外圈,822 上環蓋90a 圈狀彈簧81 内圈821 上蓋90 紅外線濾光片1〇〇 八、 本案若有化學式時，脊最能顯示發明特徵 的化學式：（無） 九、 發明說明： 丨 【發明所屬之技術領域】 ⑩ 本發明係有關一種音圈馬達驅動之自動對焦鏡頭模 組’尤指一種藉彈簧組的平衡彈簧力與電磁力以控制光學 鏡片組前/後移動而進行對焦者。 【先前技術】 數位相機或具拍攝功能的#機上均設有一鏡頭模 組’而該鏡頭模組之功能為驅動光學鏡片組沿著光轴移 動，以達到自動對焦（aut0f^cl^其/或變焦（zoom)的功能。 光學鏡片組的移動方法之一為音圈馬達VCM(Voicecoil motor) ’係藉由電流流經一線圈產生電磁場，電磁場與永 φ久磁鐵產生驅動力（driving force)而使光學鏡片組沿著光 軸移動。由於此種方法可以縮小鏡頭模組體積，近年已大 量運用於小型相機、手機相'機fcamdra>equipped cellular phone)或網路相機(web-camera)中。 習知音圈馬達VCM型式的自動對焦模組如圖1所 示，如美國專利 US2008A)013196、US6,594,450、 US7,145,738台灣專利TWM317027及日本專利 JP3124292、JP3132575，美麵要;由:1底蓋 110、二個導電 片122、一絕緣片130、四個永夂磁鐡140、鏡頭套筒150、 光學鏡片組160、一圈狀彈簧( coiled spring) 171、一線 圈180及一上蓋丨90所構成。其中，鏡頭套筒150、光學 201031987 鏡片組160、及線圈180係涵光軸移動的鏡頭組。 其中，使用圈狀彈簧Π1時，圈狀彈簧171可以產生直接 有效的彈性力，使鏡頭套筒150可以快速移動，但由於使 用圈狀彈簧171可能會使鏡頭組在移動過程中產生傾斜 (tilt)，致難以達到極高精密的古求。另一種習知音圈馬達 VCM型式的自動對焦模組如'圖辦示，其係使用葉片彈簧 172(blade spring、leaf spring)乏彝植力使鏡頭套筒150移 動，如美國專利 US2008/0186601、US2006/0181632、台灣 專利 TWM331687、TWM31873^、日本專利 JP63247924 等。 然而使用葉片彈簧172時，葉片彈簧172彈性力及運動長 度（extension length)較不足，使得鏡頭組移動緩慢，難以符 合快迷對焦的要求；甚至習麵_術像用二個葉片彈簧172 以補足運動長度不足的缺點，但仍存在移動緩慢的問題。 對於高精密、快速對焦的潘卷:，在儘量減低現有設計 巧自動對焦模組商品的變更範圍下，利用彈簧組所組合的201031987 Leaf spring 82 outer ring, 822 upper ring cover 90a coil spring 81 inner ring 821 upper cover 90 infrared filter 1〇〇8, if there is a chemical formula in this case, the ridge can best show the chemical formula of the invention: (none) Description: 丨 [Technical field to which the invention pertains] 10 The present invention relates to an autofocus lens module driven by a voice coil motor, particularly a balance spring force and electromagnetic force by a spring group to control the front/rear movement of the optical lens group. Focus on the person. [Prior Art] A digital camera or a camera with a shooting function is provided with a lens module', and the function of the lens module is to drive the optical lens group to move along the optical axis to achieve autofocus (aut0f^cl^/ Or zoom function. One of the methods of moving the optical lens group is that the voice coil motor VCM (Voicecoil motor) generates an electromagnetic field by a current flowing through a coil, and the electromagnetic field and the permanent magnet generate a driving force. The optical lens group is moved along the optical axis. Since this method can reduce the size of the lens module, it has been widely used in small cameras, mobile phones, and cellular cameras (web-camera) in recent years. . A conventional voice coil motor VCM type of autofocus module is shown in FIG. 1 , such as US Patent No. US2008A) 013196, US 6,594,450, US 7,145,738 Taiwan Patent TWM317027 and Japanese Patent JP3124292, JP3132575, beautiful; 110, two conductive sheets 122, an insulating sheet 130, four permanent magnets 140, a lens sleeve 150, an optical lens set 160, a coiled spring 171, a coil 180 and an upper cover 90 Composition. Among them, the lens sleeve 150, the optical 201031987 lens group 160, and the coil 180 are lens groups in which the optical axis moves. Wherein, when the coil spring Π1 is used, the coil spring 171 can generate a direct effective elastic force, so that the lens sleeve 150 can move quickly, but the use of the coil spring 171 may cause the lens group to tilt during the movement (tilt) ), it is difficult to achieve the extremely high precision of ancient seeking. Another conventional voice coil motor VCM type of autofocus module, as shown in the figure, uses blade spring 172 (blade spring, leaf spring) to force the lens sleeve 150 to move, such as US 2008/0186601, US2006/0181632, Taiwan patent TWM331687, TWM31873^, Japanese patent JP63247924, and the like. However, when the leaf spring 172 is used, the spring force and the extension length of the leaf spring 172 are insufficient, so that the lens group moves slowly, which is difficult to meet the requirements of the fast focus; even the face image is complemented by two leaf springs 172. The shortcomings of insufficient length of motion, but there is still a problem of slow movement. For high-precision, fast-focus pan rolls: use the combination of spring sets to minimize the range of changes in existing designs and auto-focus module products.
It力i在對焦過程中鏡頭組以近乎等速度移動，將可有 效達到高精密、快速對焦:、'減％，候斜硯象的要求。 【發明内容】 "It force i moves the lens group at almost constant speed during the focusing process, which will effectively achieve high precision, fast focus: 'minus %, waiting for oblique image requirements. [Abstract] "
位不動；藉此 可藉由圈狀彈簧及葉片彈簧兩種不同型態 其外圈保持定 201031987 之彈簧的延伸或壓縮而構成組合的彈簧力，用以配合線圈 通電後與永久磁鐵之間所產生的電滋力作用，以使該由鏡 頭套筒、光學鏡片組及線圈所構成之鏡頭組可進行穩定的 對焦移動，藉以達成快速移動、穩定對焦並減少傾斜之功 效。 j· ； *·' · 【實施方式】 為使本發明更加明確詳實茲配合下列實施例圖示詳 述如後： ❸〈第一實施例〉 參考圖3、4所示，本發明之音圈馬達驅動之自動對 .· .. 焦鏡頭模組（voice coil drivirtg3utojfocus lens module ) 1 主要包含一底蓋（base) 10 “iri勢電嚷（copperplate) 2〇、 一絕緣片（insulation spacer) 30、四永久磁鐵（permanent magnet)40、一鏡頭套筒（ Ιέιίέ Holder) 50、一光學鏡片組 (optical iens)60、一 彈簧組（spring set)80、一線圈 70 及一 上蓋（top cover) 90 ;其中，該弹簧組80包含至少一圈狀 彈簧（coilspring)81 及至少一麗^ 彈；f(bladespring)82 ;而 該鏡頭套筒50、光學鏡片£ ^0與線圈7〇係組成一可同步 ®移動的鏡頭組，俾可在底蓋10與上蓋90之間上/下（前/ 後）移動而達成對焦功效。 請再參考圖5-12，其係本實施例各構件之間之連續組 合關係示意圖；玆配合圖4及濟分別說明如下： 參考圖4、5、Η所示’底隹ΐάη係一矩形框架體，其 四角處設有扣合用四支架11供與上蓋90組合成一體，^ 中央處設有一中央孔12供潘成先?學，鏡片組60之光學路 徑，其内面分別設有數個定位稱13及隔緣用凸起14;另， 中央孔12下方處可設一紅外線遽光片（IR cut-off filter) 100如圖4所示。 .g ϋ舞:。 201031987 再參考圖4、6、14所示，二導電片2〇係分別藉其定 位孔21與定位稍13配合以电爷為麥蓋10上並形成電性隔 離狀態’並各藉一凸片22以▲不同電極；而二導電片 20之間形成一中央孔23以對^>蓋1〇之中央孔12。 再參考圖4、7所示，絕緣^ 3〇係藉其定位孔31與 定位稍I3配合而貼設在二蓴董噴、〇上，又其具一中央孔 32以對應中央孔12、23。 再參考圖4、9、14所示，Eg個永久磁鐵40係具對稱 形狀且略呈圓弧形，分別立置固定在矩形底蓋1〇之四支架 11之内侧以固設在上蓋90與底蓋1〇之間，本實施例該四 個永久磁鐵40係分別壓覆並固定在葉片彈簧82之外圈 822上面。 再參考圖4、10、14所示息轉頭套筒50係設於中央 孔12、23中，且使葉片彈簧隊亂821夾設固定在鏡 頭套筒50之底端之外緣面上;'本實施例之鏡頭套筒50係 一圓環體’設有一中央孔51 4—環狀外凸緣52 ;光學鏡 片組60係鎖固在鏡頭套筒50 ¾中央孔51中，鎖固方式不 限制，可為螺合方式或黏著方式》 再參考圖4、11、14所示，彈簧組80包含至少一圈狀 參彈簧(coil spring)81及至少-^葉讲彈簧(blade spring)82，其 中該圈狀彈簧81係套設鏡頭套、筒50之外緣面上並彈性支 撐在鏡頭套筒50之環狀外凸緣52與上蓋90之間。再如圖 4、8、14所示，彈簧組80中之葉片彈簧82係設具有一内 圈821及一相連結之外圈822，其中該内圈821係固設在 鏡頭套筒50上，其外圈822嫌|占遍在.絕緣片30上；如圖 13所示，本實施例中該内圈821可爽設固定在鏡頭套筒50 之底端之外緣面上，而該外圈822係固設在絕緣片30上並 保持不動；而依據葉片彈簧82的結構特性，該内圈821 與外圈822固定後，藉由内圈821與外圈822之間的拉伸 201031987 (相對移位）作用可產生彈性力。 鏡頭組包含鏡頭套筒50、光學鏡片組60及線圈70， 係受到線圈通電後與永久磁鐵之間所產生的電磁力、圈狀 彈簧81之彈性力及葉片彈簧ϋ之性力的淨合力（net force)而產生移勳對焦動作，i於圈&彈簧81與葉片彈簧 82在結構上為串聯彈簧，其作用上為兩者彈性係數之和， 除可減弱任一彈性力的單獨影響外，其作用方向可對鏡頭 套筒50產生接觸面的整體作用，可進一步改善單一彈簧所 產生單點的作用，而減少鏡頭組在移動過程中產生傾斜 (tilt)的現象。又，圈狀彈簧81之彈性力及葉片彈簧82之 ® 彈性力形成彈性力的合力，可進一步改善習知技術只使用 葉片彈簧82致位移量不足或彈性力不足而移動緩慢之缺 點0 再參考圖4、12、14所示，線圈70係套設在圈狀彈 簧81之外圍並固定在鏡頭套筒之:媒狀外凸緣52上而與 鏡頭套筒50組合成一連動體力本實施例進一步在上蓋90 之下方（内側）設置一上環蓋( top ring cover ) 90a，使四 個永久磁鐵40可分別固設在土緣蓋90a之四角内緣處，再 將上蓋90鎖固在底蓋10之四支架11上，以使上環蓋90a ⑩夾設在上蓋90與底蓋10之間，以組裝完成一鏡頭模組1， 並使四永久磁鐵40夾固在上環蓋之内緣面與絕緣片 30之間而不會移位。 參考圖4及圖8-14所示，其中該鏡頭套筒50、光學 鏡片組60、圈狀彈簧8卜葉片彈簧82及線圈70等構件間 之組裝次序並不限制，也就是圖8,，12並非用來限制該等構 件間之組裝次序，如光學鏡片御60及線圈70可先與鏡頭 套筒50 (圖8、9中未示光學鏡劣組#0^)組裝成一體，且 葉片彈簧82也可先組設在鏡頭套筒50 —端面上如圖13 所示，再將已組裝有光學鏡片組40、線圈70及葉片彈簧 201031987 82之鏡頭套筒50組設在絕緣片3〇上。 又彈簧組80之圈狀彈簧81可採用壓縮式圈狀 當上蓋90與底蓋1〇組合成一體時，該圈狀彈簧81可由 當的壓縮狀態，並相對壓迫鏡頭套筒5〇向下；藉由 80之組合的彈簧力使鏡頭組傷翼於其伸縮動程中之 》 (後）死點位置，而形成遠焦雄置；又線圈70之 可改變不同電極及電流大小，藉以配合永久磁鐵f〇尾端 S極而產生向上/向下（向前/向笨)之電磁力，藉以驅锫 頭組（包含鏡頭套筒50、光學鏡片組6〇及線圈7〇) ^ 片彈簧82之内圈821上/下（前/後）移動以進行對焦 '· 而在本實施例中，線圈70與永久磁鐵4〇間電磁力、之’ 方式可選擇只產生向上（向前）電磁力，使在遠焦位置 線圈70可不通電流，使鏡頭組不受電磁力作用而停留在 (後）死點位置（遠焦位置）;當欲進行對焦動作時， Ο =一適量電流通過線圈70」从產森:一適量電磁力以驅使 ，組向上（前）移動，而形彳成:緣焦狀態，而當鏡頭組上 二=力與彈簧組80之彈_;聲衡時，鍊頭組即停留在該 =後位置’因此，鏡頭組由魅向上（前）移動至近焦 須藉電磁力’而由近焦位黑向下（後）回復至遠古 =則可藉彈簧組80之回復力，谢以達成遠近對焦調整: ，：π., s η —本發明鏡頭模組1與習知1銑頭模組比較，由於彈簧組 上含一圈狀彈簧81及一葉片彈簧82，除構成串聯式掸 ^而具有串聯式彈簧力關係外，更可以利甩葉片彈簧8 狀彈簧81移動時可能產生傾斜現象 J ； 叔單只力與電磁力相互作甩爲题使鏡頭組快速與穩定 動、減少傾斜的現象發生 <第一實施例〉 201031987 參考圖15，本實施例鏡頭棋粗::la係包含一底蓋10、 二導電片20、一絕緣片30、四永久磁鐵40、一鏡頭套筒 50、一光學鏡片組60、一彈簧組80、一線圈70、及一上 蓋90，其中，彈簧組80包含一、圈狀彈簧81及一葉片彈簧 82 ;鏡頭套筒50、光學鏡片組60、線圈80及葉片彈簧82 係組成一可同步移動的鏡頭組X#可在底蓋10與上蓋90 之間前/後（上/下）移動而達成對焦功效。而本實施例之 鏡頭模組la與第一實施例鏡頭模組1的結構大致相同，二 者之間的最大差異係在於本實施例之圈狀彈簧81係套設 在線圈70之外圍，而第一實施例之鏡頭模組1之圈狀彈簧 ® 81係套設在線圈70之内圍。 由上所述，本發明鏡頭揭無l、Ja與習知鏡頭模組比 較，藉由上述結構及藉組合的彈簧力與電磁力，可使鏡頭 組快速與穩定移動、減少傾斜的現象發生。 以上所示僅為本發明之較倖實施例，對本發明而言僅 是說明性的，而非限制性的。本專業技術人員理解，在本 發明權利要求所限定的精神和範團内可對其進行許多改 變，修改，甚至等效變更，包都撕落入本發明的保護範圍 内。 ... ❿【圖式簡單說明】 圖1係習知一具音圈馬達VGM—(利用圈狀彈簧）之自動對 焦模組之示意圖。 圖2係習知另一具音圈馬逮纖用葉片彈簧）之自動 對焦模組之示意圖。 圖3係本發明第一實施例之立體組合外觀囷。 圖4係本發明第一實施例之立體分解圖。 圖5-12係本發明第一實施例各構件之間之連績組合關係 示意圖。 ά户 圖13係本發明第一實施例辦·辦彈鲁與鏡頭套筒之組裝 201031987 示意（底視）圖。 圖14係本發明第一實施例;之>711魏尹辦視圖。 圖15係本發明第二實施例之立體分解圊。 【主要元件符號說明】 鏡頭模組1 、la 底蓋10 支架11 中央孔12 定位稍13 *輿14 導電片20 定在孔ii 凸片22 中央孔23 絕緣片30 定位孔31 中央孔32 永久磁鐵40 鏡頭套筒50 丨:中輕M:1 外凸緣52 片組60 線圈70 彈簧組80 圈狀彈簧81 葉片彈簧82 内圈821 外圈822 上蓋90 上環蓋90a 紅外線濾光片100 '二:—九：-The position is not moved; thereby, the coil spring and the leaf spring can be combined to form a combined spring force by the extension or compression of the spring of the 201031987, which is used to match the coil and the permanent magnet. The generated electric force effect is such that the lens group composed of the lens sleeve, the optical lens group and the coil can perform stable focusing movement, thereby achieving fast moving, stable focusing and reducing tilting effect. [Embodiment] In order to make the present invention more explicit and detailed, the following embodiments are illustrated in detail as follows: 第一 <First Embodiment> Referring to Figures 3 and 4, the voice coil of the present invention is shown. The motor-driven automatic lens coil module (voice coil drivirtg3utojfocus lens module) 1 mainly includes a bottom cover 10 "iriplate" (copperplate) 2, an insulation spacer (insulation spacer) 30, a permanent magnet 40, a lens sleeve (Ιέιίέ Holder) 50, an optical lens set 60, a spring set 80, a coil 70 and a top cover 90; The spring set 80 includes at least one coil spring 81 and at least one coil spring; f (blade spring) 82; and the lens sleeve 50, the optical lens £^0 and the coil 7 are combined to form a synchronization. ® Moving lens group, 俾 can be moved up/down (front/rear) between the bottom cover 10 and the upper cover 90 to achieve focusing effect. Please refer again to Figures 5-12, which are continuous between the components of this embodiment. Schematic diagram of the combination relationship; Next: Referring to Figures 4, 5 and ', the bottom 隹ΐά is a rectangular frame body. The four corners of the buckle are provided at the four corners for integration with the upper cover 90. The center is provided with a central hole 12 for Pan Chengxian. The optical path of the lens group 60 is provided with a plurality of positioning 13 and a spacer 14 for the inner surface. Alternatively, an IR cut-off filter 100 may be disposed under the central opening 12. 4: .g ϋ舞: 201031987 Referring again to Figures 4, 6, and 14, the two conductive sheets 2 are respectively coupled with the positioning holes 21 and the positioning pins 13 to form the electricity on the wheat cover 10 and form electricity. The isolation state 'and each borrows a tab 22 to ▲ different electrodes; and a central hole 23 is formed between the two conductive sheets 20 to cover the central hole 12 of the cover 1 . Referring to Figures 4 and 7, The insulating layer 3 is attached to the second nozzle and the cymbal by the positioning hole 31 and the positioning slightly I3, and has a central hole 32 corresponding to the central hole 12, 23. Referring to Figures 4, 9, and 14, As shown, the Eg permanent magnets 40 have a symmetrical shape and a slightly circular arc shape, and are respectively fixedly fixed to the inner side of the four brackets 11 of the rectangular bottom cover 1 to be fixed. Between the upper cover 90 and the bottom cover 1 ,, in the embodiment, the four permanent magnets 40 are respectively pressed and fixed on the outer ring 822 of the leaf spring 82. Referring again to the FIG. 4, 10, 14 The 50 series are disposed in the central holes 12, 23, and the blade springs are erected and fixed on the outer edge surface of the bottom end of the lens sleeve 50; 'The lens sleeve 50 of the present embodiment is a ring body' A central hole 51 4 - an annular outer flange 52 is provided; the optical lens set 60 is locked in the central hole 51 of the lens sleeve 50 3⁄4, and the locking method is not limited, and may be a screwing manner or an adhesive manner. As shown in FIGS. 4, 11, and 14, the spring set 80 includes at least one coiled spring spring 81 and at least a blade spring 82, wherein the coil spring 81 is sleeved with a lens sleeve and a cylinder 50. The outer peripheral surface is elastically supported between the annular outer flange 52 of the lens barrel 50 and the upper cover 90. As shown in FIGS. 4, 8, and 14, the leaf spring 82 of the spring set 80 is provided with an inner ring 821 and a phase connecting outer ring 822, wherein the inner ring 821 is fixed on the lens sleeve 50. The outer ring 822 is disposed on the insulating sheet 30; as shown in FIG. 13, in the embodiment, the inner ring 821 can be cooled and fixed on the outer edge of the bottom end of the lens sleeve 50, and the outer ring The ring 822 is fixed on the insulating sheet 30 and remains stationary; and according to the structural characteristics of the leaf spring 82, after the inner ring 821 and the outer ring 822 are fixed, the tension between the inner ring 821 and the outer ring 822 is 201031987 ( Relative displacement) can produce elastic forces. The lens group includes a lens sleeve 50, an optical lens group 60, and a coil 70, which are the net force generated by the electromagnetic force generated between the coil and the permanent magnet after the coil is energized, the elastic force of the coil spring 81, and the force of the blade spring ( ( Net force) produces a shift focus action, i is in the ring & spring 81 and the leaf spring 82 is a series spring in the structure, the effect is the sum of the elastic coefficients of the two, in addition to weakening the individual influence of any elastic force The direction of action can have an integral effect on the contact surface of the lens sleeve 50, which can further improve the effect of a single point generated by a single spring, and reduce the phenomenon that the lens group is tilted during the movement. Further, the elastic force of the coil spring 81 and the elastic force of the leaf spring 82 form a resultant force of the elastic force, which can further improve the disadvantage that the conventional technique uses only the leaf spring 82 to cause insufficient displacement or insufficient elastic force to move slowly. As shown in FIGS. 4, 12 and 14, the coil 70 is sleeved on the periphery of the coil spring 81 and fixed to the outer sleeve 52 of the lens sleeve to be combined with the lens sleeve 50 to form a linkage force. A top ring cover 90a is disposed below (inside) the upper cover 90 so that the four permanent magnets 40 can be respectively fixed at the inner edges of the four corners of the soil edge cover 90a, and the upper cover 90 is locked to the bottom cover 10 The four brackets 11 are arranged such that the upper ring cover 90a 10 is sandwiched between the upper cover 90 and the bottom cover 10 to assemble a lens module 1 and the four permanent magnets 40 are clamped on the inner surface of the upper ring cover and insulated. The sheets 30 are not displaced. Referring to FIG. 4 and FIG. 8-14, the order of assembly between the lens sleeve 50, the optical lens group 60, the coil spring 8 and the coil spring 82 and the coil 70 is not limited, that is, FIG. 12 is not intended to limit the assembly sequence between the components, such as the optical lens 60 and the coil 70 may be first assembled with the lens sleeve 50 (not shown in FIGS. 8 and 9). The spring 82 can also be assembled on the end surface of the lens sleeve 50 as shown in FIG. 13, and the lens sleeve 50 in which the optical lens group 40, the coil 70 and the leaf spring 201031987 82 are assembled is assembled on the insulating sheet 3〇. on. Further, the coil spring 81 of the spring group 80 can adopt a compression type. When the upper cover 90 and the bottom cover 1 are integrally combined, the coil spring 81 can be in a compressed state and pressed downward relative to the lens sleeve 5; By the spring force of the combination of 80, the lens group is wound at the "rear" dead point position in the telescopic stroke, and the telephoto beam is formed; and the coil 70 can change the different electrodes and the current to match the permanent magnet f. The S pole at the end of the tail produces an upward/downward (forward/toward stupid) electromagnetic force, thereby driving the head group (including the lens sleeve 50, the optical lens group 6〇 and the coil 7〇) ^ within the leaf spring 82 The circle 821 is moved up/down (front/rear) to focus '· and in the present embodiment, the electromagnetic force between the coil 70 and the permanent magnet 4 is selected to generate only an upward (forward) electromagnetic force. In the far focus position coil 70 can not pass current, so that the lens group is not affected by the electromagnetic force and stays at the (post) dead point position (far focus position); when the focus action is to be performed, Ο = an appropriate amount of current is passed through the coil 70" Sen: An appropriate amount of electromagnetic force to drive, the group moves up (front), and Shaped into: edge state, and when the lens group on the two = force and the spring group 80 bomb _; sound balance, the chain head group stays in the = rear position 'Therefore, the lens group moves from the charm up (front) To the near focus, the electromagnetic force must be borrowed from the near focus to the black (downward) to the ancient = then the recovery force of the spring group 80 can be used to achieve the near and far focus adjustment: ,: π., s η - the lens of the present invention Compared with the conventional 1 milling head module, the module 1 has a ring spring 81 and a leaf spring 82 on the spring group, and has a series spring force relationship in addition to the series type 掸^, which can further benefit the leaf spring. When the 8-spring 81 moves, a tilt phenomenon J may occur; a single-only force and an electromagnetic force act together to cause a rapid and stable movement of the lens group, and a phenomenon of tilt reduction occurs. [First Embodiment] 201031987 Referring to FIG. The lens of the embodiment has a bottom cover 10, two conductive sheets 20, an insulating sheet 30, four permanent magnets 40, a lens sleeve 50, an optical lens group 60, a spring group 80, and a coil 70. And an upper cover 90, wherein the spring set 80 comprises a ring spring 81 and a blade spring The spring 82; the lens sleeve 50, the optical lens group 60, the coil 80 and the leaf spring 82 form a synchronously movable lens group X# which can be moved forward/backward (up/down) between the bottom cover 10 and the upper cover 90. Focusing effect. The lens module 1a of the present embodiment is substantially the same as the lens module 1 of the first embodiment. The maximum difference between the two is that the coil spring 81 of the present embodiment is sleeved on the periphery of the coil 70. The coil spring® 81 of the lens module 1 of the first embodiment is sleeved inside the coil 70. As described above, the lens of the present invention is compared with the conventional lens module. With the above-mentioned structure and the combined spring force and electromagnetic force, the lens group can be moved quickly and stably, and the tilt phenomenon can be reduced. The above is only the preferred embodiment of the present invention, and is intended to be illustrative only and not limiting. It will be understood by those skilled in the art that many changes, modifications and even equivalents may be made without departing from the spirit and scope of the invention. ... ❿ [Simple description of the drawing] Fig. 1 is a schematic diagram of an automatic focusing module of a voice coil motor VGM (using a coil spring). Fig. 2 is a schematic view showing an automatic focusing module of another conventional leaf spring for a voice coil. Fig. 3 is a perspective view of the stereoscopic combination of the first embodiment of the present invention. Figure 4 is a perspective exploded view of the first embodiment of the present invention. Fig. 5-12 is a schematic diagram showing the joint performance relationship between the members of the first embodiment of the present invention. Figure 13 is a first embodiment of the present invention. The assembly of the projectile and the lens sleeve 201031987 is a schematic (bottom view). Figure 14 is a view of the first embodiment of the present invention; Figure 15 is a perspective exploded view of a second embodiment of the present invention. [Main component symbol description] Lens module 1 , la bottom cover 10 bracket 11 central hole 12 positioning slightly 13 * 舆 14 conductive sheet 20 fixed in hole ii tab 22 central hole 23 insulating sheet 30 positioning hole 31 central hole 32 permanent magnet 40 Lens sleeve 50 丨: Medium light M: 1 Outer flange 52 Chip set 60 Coil 70 Spring set 80 Ring spring 81 Leaf spring 82 Inner ring 821 Outer ring 822 Upper cover 90 Upper ring cover 90a Infrared filter 100 'Two: -nine:-