200938893 九、發明說明： 【發明所屬之技術領域】 :本發明涉及一種鏡頭模組’尤其涉及一種具有對焦功 :能之鏡頭模組。 【先前技術】 隨著通訊技術之快速發展，數位相機已被人們廣泛地 應用於行動電話等可檇式電子設備中（請參見DeveloPment of compact camera module having auto focus actuator and O mechanical shutter system for mobile phone » Control, Automation and Systems, 2007. ICCAS '07. International Conference on 17-20 Oct· 2007 Page(s):2319-2322)。然而數 位相機之鏡頭模組於組裝後，受各部件製造工藝限制，鏡 頭焦距難免存在誤差，必須經調整、校對，方可使影像感 測器輸出清晰之影像。 目前，常用之具有對焦功能之鏡頭模組通常包括鏡 頭、影像感測器及步進馬達。該鏡頭通常包括鏡筒及收容 〇 於鏡筒内之光學元件（例如濾光片、對焦鏡片組、變焦鏡 片組等）。步進馬達驅動鏡頭進行位置調節，最終使影像感 測器輸出清晰之影像。 然而，步進馬達驅動鏡頭時，鏡筒相對於影像感測器 旋轉，使得鏡筒之中心轴易偏斜，從而影響了對焦過程之 穩定性，加大了對焦之難度。 【發明内容】 有鑒於此，提供一種可實現穩定對焦之鏡頭模組實為 7 200938893 必要。 ; —種鏡賴組，包括鏡座及鏡筒，減座具有一容f 腔’該鏡頭模組進一步包括一 ；μ- .κ _ 括收谷於該谷置腔内之第一旋 同、至> -與,亥第一旋轉筒外壁相連並向該第一旋轉 外凸出之凸柄及-固接於該鏡座之限制板，該第一旋轉筒 具有内螺紋’該鏡筒具有主體部及前端部，該鏡筒之 4收谷於該鏡座之容置腔内且其内壁具有與該内螺纹相配 ❹：之外螺紋，該鏡筒藉由該外螺紋與該第一旋轉筒螺接， 該鏡座具有至少一第—定位單元，該鏡筒之前端部具有盥 該第-定位單元配合使用之第二定位單元，用於阻擒該鏡 筒相對該鏡座旋轉，該限制板開設有與該第一定位單元相 對^之定位孔，用於限制該第一旋轉筒，以使其不能沿該 鏡同之中心軸方向移動，該容置腔之側壁具有一開口，該 凸柄至少部分收容於該開口中。 ^ 一種鏡頭模組，包括鏡座及鏡筒，該鏡座具有一容置 〇腔丄該鏡頭模組進一步包括一收容於該容置腔内之第一旋 轉筒、至少一與該第一旋轉筒外壁相連並向該第一旋轉筒 外凸出之凸柄，該第一旋轉筒具有内螺紋，該鏡筒具有主 體部及前端部，該鏡筒之主體部收容於該鏡座之容置腔内 且其内壁具有與該内螺紋相配合之外螺紋，該鏡筒藉由該 外螺紋與該第一旋轉筒螺接，該鏡座具有至少一第一定位 單元，該鏡筒之前端部具有與該第一定位單元配合使用之 第二定位單元，用於阻擋該鏡筒相對該鏡座旋轉，該容置 腔之側壁具有一開口，該開口沿該鏡筒之中心軸方向之高 8 200938893 度等於該凸柄沿該鏡筒之中心軸方向 •第一旋轉筒，以使其不能 > 兮f饩 又 於限制該 凸柄至少部分收容於該開口中。 万向移動，該 相對於先前技術，本發明所提供之 程中’其凸柄帶動第一旋轉筒旋轉 ：：：焦過 螺接為-體，第-旋轉筒之旋轉會帶動鏡筒 〜與鏡时第4位單元與第二定位 立使付鏡筒繞其中心轴之轉動被限制，從 中Γ方向移動，故，該鏡筒相對於影像感測器: 定讀’從而使得鏡筒之中心軸不易偏斜，對焦過程更穩 【實施方式】 請-併參考圖i、圖2及圖3,其為本發明第—實施例 ©提供之鏡頭模組10。該鏡頭模組10包括：鏡座20、中心 轴為⑽之鏡筒30、旋轉單元40及限制板5〇。於旋轉單元 4〇之旋轉帶動下，該鏡筒30可於鏡座20内沿中心軸〇〇，方 向移動，從而實現對焦功能。 該鏡座20呈圓形，具有一圓形之容置筒21。該容置筒 21之側壁圍成一容置腔210。該容置腔210具有頂部容置 腔2100及底部容置腔2102。該底部容置腔2102用來收容 設於電路板60上之影像感測器7〇。該頂部容置腔21〇〇用 來收容鏡筒30。該頂部容置腔21〇〇之側壁上開設有一沿圓 9 200938893 周方向且向容置筒21徑向延伸之開口 212。該開口 212具 有三個側壁2122、2123及2124。其中，侧壁2122與側壁 ^ 2124相對。該頂部容置腔2100之側壁沿中心軸〇〇'方向延 : 伸形成三個均勻分佈之第一定位單元22。本實施例中，該 第一定位單元22為圓柱形凸銷。可理解，該第一定位單元 22之形狀亦可為長方體、正方體等其他幾何形狀，不限於 本實施例，只要可實現定位功能即可。 該容置筒21之側壁沿容置筒21徑向向容置筒21内凸 ¥出一環形之承載台214。該承載台214位於頂部容置腔2100 及底部容置腔2102之間。該承載台214用來承載旋轉單元 40 ° 本實施例中，容置筒21及第一定位單元22係一體成 型。可理解，亦可將容置筒21及第一定位單元22分別單 獨成型，再藉由膠合黏結、螺接或其他固接方法將容置筒 21及第一定位單元22連為一體，不限於本實施例，只要將 ❹容置筒21及第一定位單元22固接即可。 該鏡筒30用來收容至少一鏡片32。該鏡筒30具有主 體部302及與主體部302 —端相連之前端部304。該主體部 302具有外螺紋3021，用來收容鏡片32。 該前端部304為圓形，且與主體部302係一體成型。 該前端部304開設有一位於圓形中心之光圈孔3041及三個 與第一定位單元22配合使用之第二定位單元3042。該光圈 孔3041用來控制進入主體部302之光通量。該第二定位單 元3042藉由與第一定位單元22配合使得鏡筒30僅能沿中 200938893 •:方向移動。本實施例中’該第二定位單元3〇42為圓 可理解’該前端部3〇4亦可為正方形、長 • A何形狀，不限於本實施例， 等八他 孔3041，且閧&右@ # ，、要/、戎何中心開設有光圈 -30.；；"：^ 可為長方形通孔、圓形f :第一疋位單元3042亦 只要與第一定位置_盲孔等其他孔，不限於本實施例， ❹沿中心軸⑽方向移：:配::得$ —3 °，能轉動僅能 亦可為凹槽。 田…、u第一疋位單π 3042 :-旋第有:::…旋轉筒“及-沿第 .第-旋轉筒“之内壁上凸柄42。該 紋_，且該第-旋轉筒41之:==，配合之内螺 從而可防止旋轉單元 工、承載口 214之内徑， ❾口 212巾，且凸搞42 =7°傾斜。該凸柄42收容於開 筒Μ外凸出開口 212 =由:轉筒41之徑向向第—旋轉 旋轉，從而帶動鏡筒30曰沿中^凸柄太42帶動旋轉單元4〇 中’該第-旋轉筒41沿中 ：。本實施例 腔_之侧壁沿中心轴—方高向度之；度專於_ =柄42可單獨成型’再藉 固接方法與第一旋轉筒41接為_體 螺接^他 ::成型。本實施例中，該凸柄二/轉= 11 200938893 可理解，該凸柄42亦可全部收容於開口中，不限於本 ' 實施例，只要該凸柄42可被撥動，從而帶動旋轉單元40 κ 旋轉即可。 : 該限制板50為圓形，其中心開設有通孔501，其設有 三個與第一定位單元22相對應之定位孔502。該通孔501 之直徑與主體部302之外徑相等，且第一定位單元22穿過 定位孔502後，該限制板50藉由膠合黏接方法與頂部容置 腔2100之側壁之上表面固接為一體，從而限制旋轉單元40 ®僅能轉動不能沿中心軸〇〇'方向移動。 可理解，該限制板50亦可為長方形、正方形等其他幾 何形狀，不限於本實施例，只要其中心開設有直徑與主體 部302之外徑相等之通孔501，並開設有與第一定位單元 22相對應之定位孔502即可。 組裝該鏡頭模組10時，先將收容有鏡片32之鏡筒30 套入限制板50之通孔501中，將鏡筒30與旋轉單元40螺 ❹接，然後將第一定位單元22依次穿過定位孔502、第二定 位單元3042，使得旋轉單元40置於鏡座20中，最後將限 制板50藉由膠合黏接方法與頂部容置腔2100之側壁之上 表面固接為一體。藉由撥動凸柄42帶動旋轉單元40旋轉， 從而帶動鏡筒30僅能沿中心轴〇〇'移動來改變鏡片32與影 像感測器70之間距，實現鏡頭模組10之對焦功能。 請參考圖4,其為本發明第二實施例提供之鏡頭模組 10a，該鏡頭模組10a與鏡頭模組10基本上相同，其包括： 鏡座20a、鏡筒30a及旋轉單元40a，該鏡座20a具有頂部 12 200938893 容置腔2100a，該頂部容置腔2100a之側壁具有一開口 212a，該旋轉單元40a具有第一旋轉筒41a及一沿第一旋轉 κ 筒41a徑向且向第一旋轉筒41a外凸出之凸柄42a，不同之 : 處在於：該鏡頭模組10a沒有限制板，該鏡座20a具有第 一定位單元22a，該第一定位單元22a為圓形盲孔，該開口 212a具有四個侧壁2122a、2123a、2124a及2125，且該開 口 212a沿平行於鏡筒30a之中心軸方向之高度等於凸柄 42a沿平行於鏡筒30a之中心軸方向之高度，從而可限制第 ® —旋轉筒41a僅能轉動不能沿鏡筒30a之中心軸方向移 動，該側壁2122a與侧壁2124a相對，側壁2123a與侧壁 2125相對，該鏡筒30a具有第二定位單元3042a，該第二 定位單元3042a為圓柱形定位凸銷，該凸柄42a藉由膠合 黏接方法與第一旋轉筒41a固接為一體。 可理解，該第一定位單元22a亦可為正方體形通孔、 長方體形通孔等其他孔，相應地，該第二定位單元3042a ^為正方體形凸銷、長方體形凸銷等其他形狀之凸銷，不限 於本實施例，只要第一定位單元22a與第二定位單元3042a 配合使用使得鏡筒30a僅能沿其中心軸方向移動即可。當 然，該第一定位單元22a亦可為凹槽。 請一併參考圖5、圖6及圖7,其為本發明第三實施例 所提供之鏡頭模組l〇b。該鏡頭模組10b包括：鏡座20b、 中心轴為50'之鏡筒30b、旋轉單元40b及限制板50b。 該鏡座20b具有一外壁呈正方形、内壁呈圓形之容置 筒21b。該容置筒21b之側壁圍成一容置腔210b。該容置 13 200938893 腔210b具有頂部容置腔2100b及底部容置腔2102b，該底 部容置腔2102b用來收容設於電路板60b上之影像感測器 "70b。該頂部容置腔2100b用來收容鏡筒30b。該頂部容置 :腔2100b之側壁上開設有四個均勻分佈之沿正方形邊長方 向且向容置筒21b内部延伸之開口 212b。該開口 212b具有 三個側壁2122b、2123b及2124b。該侧壁2122b與侧壁2124b 相對。該頂部容置腔2100b之側壁沿中心軸βσ方向延伸形 成四個均勻分佈之第一定位單元22b。每一第一定位單元 ® 22b位於相鄰兩開口 212b之間。本實施例中，該第一定位 單元22b為圓柱形之凸銷。可理解，該第一定位單元22b 之形狀亦可為長方體、正方體等其他幾何形狀，不限於本 實施例，只要可實現定位功能即可。 該容置筒21b之侧壁沿容置筒21b徑向向容置筒21b 内凸出一環形之承載台214b。該承載台214b位於頂部容置 腔2100b及底部容置腔2102b之間。該承載台214b用來承 ❹載旋轉單元40b。 該鏡筒30b之結構與鏡筒30基本相同，具有主體部 302b及前端部304b，該主體部302b具有外螺紋3021b，用 來容置鏡片32b，不同之處在於：該前端部302b為正方形， 具有四個與第一定位單元22b相配合之第二定位單元 3042b。本實施例中，該第二定位單元3042b為圓形通孔。 可理解，該第二定位單元3042b亦可為長方形通孔、圓形 盲孔等其他孔，不限於本實施例，只要與第一定位單元22b 相配合使得鏡筒30b不能轉動僅能沿中心軸β〇'方向移動即 14 200938893 可。當然，該第二定位單元3042b亦可為凹槽。 ^ 該旋轉單元40b之結構與旋轉單元40基本相同，該旋 / 轉單元40b為具有第一旋轉筒41b及一沿第一旋轉筒41b : 徑向且向第一旋轉筒41b外凸出之凸柄42b，該第一旋轉筒 41b具有與外螺紋3021b相配合之内螺紋410b，不同之處 在於：該凸柄42b與第一旋轉筒41b係單獨成型之，再藉 由膠合黏結方法固接為一體，該凸柄42b容置於任一開口 212b中，該旋轉單元40b還具有一與第一旋轉筒41b之一 ®端相連接之第二旋轉筒43,該第二旋轉筒43使得旋轉單元 40b與鏡座20b定位，該第二旋轉筒43與第一旋轉筒41b 一體成型，該第二旋轉筒43位於第一旋轉筒41b與影像感 測器70b之間，該第二旋轉筒43之外徑與承載台214b之 内徑相等，且第二旋轉筒43之内徑大於主體部302b之内 徑。 可理解，該第一旋轉筒41b及第二旋轉筒43可分別單 0獨成型，再藉由膠合黏結、螺接或其他固接方法將第一旋 轉筒41b及第二旋轉筒43固接為一體，不限於本實施例， 只要第一旋轉筒41b及第二旋轉筒43固接為一體即可。 可理解，該第二旋轉筒43之内徑亦可等於主體部302b 之内徑，不限於本實施例，只要藉由鏡片32b之光線可順 利地射到影像感測器70b上即可。 該限制板50b之結構與限制板50的結構基本相同，不 同之處在於：該限制板50b為正方形，具有四個與第一定 位單元22b相對應之定位孔502b。 15 200938893 可理解，該凸柄42b亦可為兩個、三個或複數個，不 :限於本實施例，只要該凸柄42b之個數小於或等於開口 212b之個數，從而撥動任一凸柄42b可帶動第一旋轉筒4让 . 旋轉即可。 可理解’該第-定位單元咖之數量還可為一個、兩 個或複數個，不限於實施例中所提供之三個或四個， ^吏得鏡筒鳩不會轉動僅能沿其中心軸⑽，方向軸即 化。^外、= ?術人員還可於本發明精神内做其他變 狢日 l、據本發明精神所做之變化，都應包含於本 發明所要求保護之範圍之内。 於本 *出=合發明專利之要件，遂依法 式，自不能以此限制本案之;明:較佳實施方 $藝之人士援依本發明之精神所 =本: ❹應涵蓋於以下申請專利範圍内。彳私飾或變化，皆 【圖式簡單說明】 圖1係本發明第一實施 圖2係圖i中鏡頭模,且之立=模組之結構示意圖。 圖4係本發之結構分解圖。 圖5係本發明第 中鏡頭楔組之結構分解圖。 以係圖5中鏡;C組之結構示意圖。 圖7係本發明第體剖視圖。 第-實把例中鏡頭模組之結構分解圖。 16 200938893 【主要元件符號說明】 /鏡頭模組 • 鏡座 鏡筒 旋轉單元 限制板 容置筒 ®容置腔 頂部容置腔 底部容置腔 電路板 影像感測器 開口 第一側壁200938893 IX. Description of the Invention: [Technical Field] The present invention relates to a lens module ‘, particularly to a lens module having a focusing power; [Prior Art] With the rapid development of communication technology, digital cameras have been widely used in portable electronic devices such as mobile phones (see DeveloPment of compact camera module having auto focus actuator and O mechanical shutter system for mobile phone). » Control, Automation and Systems, 2007. ICCAS '07. International Conference on 17-20 Oct. 2007 Page(s): 2319-2322). However, after the lens module of the digital camera is assembled, it is limited by the manufacturing process of each component, and the focal length of the lens is inevitably subject to error. It must be adjusted and proofed to enable the image sensor to output a clear image. At present, the commonly used lens module with focusing function usually includes a lens, an image sensor and a stepping motor. The lens typically includes a lens barrel and optical components (e.g., filters, focus lens sets, zoom lens sets, etc.) housed within the lens barrel. The stepper motor drives the lens for position adjustment, which ultimately causes the image sensor to output a clear image. However, when the stepping motor drives the lens, the lens barrel rotates relative to the image sensor, so that the central axis of the lens barrel is easily skewed, thereby affecting the stability of the focusing process and increasing the difficulty of focusing. SUMMARY OF THE INVENTION In view of this, it is necessary to provide a lens module that can achieve stable focusing. a mirror group, including a lens holder and a lens barrel, the reduction seat has a cavity, the lens module further includes a; μ-.κ _ includes a first rotation in the valley cavity, To > - a shank that is connected to the outer wall of the first rotating cylinder and protrudes outwardly from the first rotation and is fixed to the limiting plate of the mirror holder, the first rotating cylinder has an internal thread 'the barrel has a main body portion and a front end portion, the lens barrel 4 is received in the accommodating cavity of the lens holder and the inner wall thereof is matched with the internal thread: an external thread, the lens barrel is rotated by the external thread and the first rotation The lens holder has at least one first positioning unit, and the front end of the lens barrel has a second positioning unit used in conjunction with the first positioning unit for blocking rotation of the lens barrel relative to the lens holder. The limiting plate is provided with a positioning hole opposite to the first positioning unit for limiting the first rotating cylinder so as not to move along the central axis direction of the mirror, and the side wall of the receiving cavity has an opening, The lug is at least partially received in the opening. A lens module includes a lens holder and a lens barrel, the lens holder having a receiving cavity, the lens module further comprising a first rotating cylinder received in the receiving cavity, at least one and the first rotation a shank that is connected to the outer wall of the cylinder and protrudes outwardly from the first rotating cylinder. The first rotating cylinder has an internal thread. The lens barrel has a main body portion and a front end portion. The main body portion of the lens barrel is received in the lens holder. The inner wall of the cavity has a thread corresponding to the internal thread, and the lens barrel is screwed to the first rotating cylinder by the external thread, the lens holder has at least a first positioning unit, and the front end of the lens barrel a second positioning unit for use in conjunction with the first positioning unit for blocking rotation of the lens barrel relative to the lens holder, the side wall of the receiving cavity having an opening, the opening being 8 inches along the central axis of the lens barrel The degree of 200938893 is equal to the direction of the shank along the central axis of the lens barrel. The first rotating cylinder is such that it cannot be > 兮f 饩 and the shank is at least partially received in the opening. The universal movement, which is relative to the prior art, provides a process in which the shank of the present invention drives the first rotating cylinder to rotate::: the focal screw is connected to the body, and the rotation of the first rotating cylinder drives the lens barrel~ When the mirror is in position, the fourth unit and the second positioning unit are restricted from rotating about the central axis thereof, and are moved from the middle direction. Therefore, the lens barrel is opposite to the image sensor: the reading is performed to make the center of the lens barrel The shaft is not easily deflected, and the focusing process is more stable. [Embodiment] Please refer to FIG. 2, FIG. 2 and FIG. 3, which are the lens module 10 provided in the first embodiment of the present invention. The lens module 10 includes a lens holder 20, a lens barrel 30 having a central axis of (10), a rotating unit 40, and a limiting plate 5A. Under the rotation of the rotating unit 4, the lens barrel 30 can be moved in the direction of the central axis in the lens holder 20 to achieve the focusing function. The lens holder 20 has a circular shape and has a circular receiving cylinder 21. The side wall of the accommodating cylinder 21 encloses a accommodating cavity 210. The accommodating cavity 210 has a top accommodating cavity 2100 and a bottom accommodating cavity 2102. The bottom receiving cavity 2102 is configured to receive an image sensor 7A disposed on the circuit board 60. The top accommodating chamber 21 is for accommodating the lens barrel 30. An opening 212 extending in the circumferential direction of the circle 9 200938893 and extending radially toward the accommodating cylinder 21 is defined in the sidewall of the top accommodating cavity 21 〇〇. The opening 212 has three side walls 2122, 2123 and 2124. The sidewall 2122 is opposite to the sidewall ^ 2124. The sidewall of the top accommodating cavity 2100 extends along the central axis 〇〇' to form three uniformly spaced first positioning units 22. In this embodiment, the first positioning unit 22 is a cylindrical protruding pin. It can be understood that the shape of the first positioning unit 22 can also be other geometric shapes such as a rectangular parallelepiped, a square, and the like, and is not limited to the embodiment, as long as the positioning function can be realized. The side wall of the accommodating cylinder 21 protrudes from the accommodating cylinder 21 toward the accommodating cylinder 21 in a radial direction. The carrier 214 is located between the top receiving cavity 2100 and the bottom receiving cavity 2102. The carrying platform 214 is used to carry the rotating unit 40 °. In this embodiment, the receiving cylinder 21 and the first positioning unit 22 are integrally formed. It can be understood that the accommodating cylinder 21 and the first positioning unit 22 can be separately formed, and the accommodating cylinder 21 and the first positioning unit 22 are integrally connected by a glue bonding, screwing or other fixing method, which is not limited thereto. In this embodiment, the cartridge holder 21 and the first positioning unit 22 may be fixed. The lens barrel 30 is for receiving at least one lens 32. The barrel 30 has a main body portion 302 and a front end portion 304 that is connected to the end of the main body portion 302. The body portion 302 has external threads 3021 for receiving the lens 32. The front end portion 304 is circular and integrally formed with the main body portion 302. The front end portion 304 defines a diaphragm aperture 3041 located at a center of the circle and three second positioning units 3042 for use with the first positioning unit 22. The aperture aperture 3041 is used to control the luminous flux entering the body portion 302. The second positioning unit 3042 cooperates with the first positioning unit 22 so that the lens barrel 30 can only move in the direction of the middle 200938893 •:. In this embodiment, the second positioning unit 3〇42 is circular and understandable. The front end portion 3〇4 may also be square, long, and shaped. It is not limited to the embodiment, and the eight holes 3041, and 哄& ; right @ # ,,要/, 戎何中心有 aperture -30.;;":^ can be rectangular through hole, round f: first clamping unit 3042 as long as the first fixed position _ blind hole Other holes, etc., are not limited to this embodiment, and the ❹ is moved along the central axis (10):: with:: $ -3 °, the rotation can only be a groove. Field..., u first position single π 3042 : - 旋 first :::... Rotating cylinder "and - along the inner wall of the first - rotating cylinder" on the inner shank 42. The pattern _, and the first-rotating cylinder 41: ==, cooperates with the inner screw to prevent the inner diameter of the rotating unit, the bearing port 214, the mouth 212, and the convex 42 = 7° inclination. The shank 42 is received in the outer bulge opening 212 of the open cylinder = by the radial rotation of the rotating drum 41 to the first rotation, thereby driving the lens barrel 30 曰 along the middle shank 42 to drive the rotating unit 4 ' The first-rotating cylinder 41 is in the middle:. In this embodiment, the sidewall of the cavity _ is along the central axis—the square height is oriented; the degree is specialized for _=the shank 42 can be separately molded', and the first rotating cylinder 41 is connected to the first rotating cylinder 41. forming. In this embodiment, the stalk 2/turn = 11 200938893 It can be understood that the shank 42 can also be completely accommodated in the opening, and is not limited to the embodiment, as long as the shank 42 can be plucked to drive the rotating unit. 40 κ can be rotated. The limiting plate 50 has a circular shape, and a through hole 501 is defined in the center thereof, and three positioning holes 502 corresponding to the first positioning unit 22 are disposed. The diameter of the through hole 501 is equal to the outer diameter of the main body portion 302. After the first positioning unit 22 passes through the positioning hole 502, the limiting plate 50 is fixed to the upper surface of the sidewall of the top receiving cavity 2100 by a glue bonding method. It is integrated to limit the rotation unit 40 ® to rotate only in the direction of the center axis 〇〇 '. It can be understood that the limiting plate 50 can also be other geometric shapes such as a rectangle, a square, etc., and is not limited to the embodiment, as long as a through hole 501 having a diameter equal to the outer diameter of the main body portion 302 is opened in the center, and the first positioning is performed. The unit 22 corresponds to the positioning hole 502. When the lens module 10 is assembled, the lens barrel 30 containing the lens 32 is first inserted into the through hole 501 of the limiting plate 50, the lens barrel 30 is screwed to the rotating unit 40, and then the first positioning unit 22 is sequentially worn. The positioning hole 502 and the second positioning unit 3042 are disposed such that the rotating unit 40 is placed in the lens holder 20. Finally, the limiting plate 50 is integrally fixed to the upper surface of the sidewall of the top receiving cavity 2100 by a glue bonding method. By rotating the knob 42 to rotate the rotating unit 40, the lens barrel 30 can only move along the central axis 〇〇' to change the distance between the lens 32 and the image sensor 70, thereby achieving the focusing function of the lens module 10. Please refer to FIG. 4 , which is a lens module 10 a according to a second embodiment of the present invention. The lens module 10 a is substantially identical to the lens module 10 and includes: a lens holder 20 a , a lens barrel 30 a and a rotating unit 40 a . The lens holder 20a has a top portion 12 200938893 accommodating chamber 2100a, and a side wall of the top accommodating chamber 2100a has an opening 212a having a first rotating cylinder 41a and a radial direction and a first direction along the first rotating κ cylinder 41a. The protrusion 42a protrudes from the outer portion of the rotating cylinder 41a. The lens housing 10a has a first positioning unit 22a. The first positioning unit 22a has a circular blind hole. The opening 212a has four side walls 2122a, 2123a, 2124a and 2125, and the height of the opening 212a in the direction parallel to the central axis of the lens barrel 30a is equal to the height of the shank 42a in the direction parallel to the central axis of the lens barrel 30a, so that The second stage - the rotating cylinder 41a is only rotatable and cannot move in the direction of the central axis of the lens barrel 30a. The side wall 2122a is opposite to the side wall 2124a. The side wall 2123a is opposite to the side wall 2125. The barrel 30a has a second positioning unit 3042a. The second positioning unit 3042a is A cylindrical positioning lug, the lug 42a by gluing and bonding method of the first rotary cylinder 41a fixed integrally. It can be understood that the first positioning unit 22a can also be a square-shaped through hole, a rectangular parallelepiped through hole, and the like. Accordingly, the second positioning unit 3042a is a convex shape of a square-shaped convex pin, a rectangular parallelepiped, and the like. The pin is not limited to the embodiment, as long as the first positioning unit 22a is used in cooperation with the second positioning unit 3042a so that the lens barrel 30a can move only in the direction of its central axis. Of course, the first positioning unit 22a can also be a groove. Please refer to FIG. 5, FIG. 6, and FIG. 7, which are lens modules 10b according to a third embodiment of the present invention. The lens module 10b includes a lens holder 20b, a lens barrel 30b having a central axis of 50', a rotating unit 40b, and a limiting plate 50b. The lens holder 20b has a housing 21b having a square outer wall and a circular inner wall. The side wall of the accommodating cylinder 21b is surrounded by a accommodating cavity 210b. The housing 210b has a top receiving cavity 2100b and a bottom receiving cavity 2102b for receiving an image sensor "70b disposed on the circuit board 60b. The top accommodating chamber 2100b is for accommodating the lens barrel 30b. The top receiving portion has four uniformly distributed openings 212b extending along the square side of the cavity and extending toward the inside of the accommodating cylinder 21b. The opening 212b has three side walls 2122b, 2123b and 2124b. The side wall 2122b is opposite the side wall 2124b. The side wall of the top accommodating chamber 2100b extends in the direction of the central axis βσ to form four uniformly distributed first positioning units 22b. Each of the first positioning units ® 22b is located between the adjacent two openings 212b. In this embodiment, the first positioning unit 22b is a cylindrical protruding pin. It can be understood that the shape of the first positioning unit 22b may be other geometric shapes such as a rectangular parallelepiped, a square, and the like, and is not limited to the embodiment, as long as the positioning function can be realized. The side wall of the accommodating cylinder 21b protrudes radially from the accommodating cylinder 21b toward the accommodating cylinder 21b. The carrier 214b is located between the top receiving chamber 2100b and the bottom receiving chamber 2102b. The carrier 214b is used to carry the rotating unit 40b. The lens barrel 30b has the same structure as the lens barrel 30, and has a main body portion 302b and a front end portion 304b. The main body portion 302b has an external thread 3021b for receiving the lens 32b, except that the front end portion 302b is square. There are four second positioning units 3042b that cooperate with the first positioning unit 22b. In this embodiment, the second positioning unit 3042b is a circular through hole. It can be understood that the second positioning unit 3042b can also be a rectangular through hole, a circular blind hole or the like. It is not limited to the embodiment, and the lens barrel 30b can be rotated only along the central axis as long as it cooperates with the first positioning unit 22b. The movement of β〇' is 14 200938893. Of course, the second positioning unit 3042b can also be a groove. The structure of the rotating unit 40b is substantially the same as that of the rotating unit 40. The rotating/rotating unit 40b has a first rotating cylinder 41b and a convex portion which is convex in the radial direction and outward of the first rotating cylinder 41b. The shank 42b has an internal thread 410b that cooperates with the external thread 3021b, except that the shank 42b is separately formed from the first rotating cylinder 41b, and is fixed by a gluing method. In one piece, the lug 42b is received in any opening 212b. The rotating unit 40b further has a second rotating cylinder 43 connected to one end of the first rotating cylinder 41b. The second rotating cylinder 43 makes the rotating unit 40b is positioned with the lens holder 20b, the second rotating cylinder 43 is integrally formed with the first rotating cylinder 41b, and the second rotating cylinder 43 is located between the first rotating cylinder 41b and the image sensor 70b, and the second rotating cylinder 43 The outer diameter is equal to the inner diameter of the carrier 214b, and the inner diameter of the second rotating cylinder 43 is larger than the inner diameter of the main body portion 302b. It can be understood that the first rotating cylinder 41b and the second rotating cylinder 43 can be separately formed by a single 0, and then the first rotating cylinder 41b and the second rotating cylinder 43 are fixed by glue bonding, screwing or other fixing methods. The integration is not limited to the embodiment, and the first rotating cylinder 41b and the second rotating cylinder 43 may be integrally fixed. It can be understood that the inner diameter of the second rotating cylinder 43 can also be equal to the inner diameter of the main body portion 302b, and is not limited to the embodiment, as long as the light of the lens 32b can be smoothly incident on the image sensor 70b. The structure of the limiting plate 50b is substantially the same as that of the limiting plate 50, except that the limiting plate 50b is square and has four positioning holes 502b corresponding to the first positioning unit 22b. 15 200938893 It can be understood that the convex shank 42b can also be two, three or plural, and is not limited to the embodiment, as long as the number of the convex shanks 42b is less than or equal to the number of the openings 212b, thereby dialing either The shank 42b can drive the first rotating cylinder 4 to rotate. It can be understood that the number of the first positioning unit may also be one, two or plural, not limited to three or four provided in the embodiment, and the lens barrel does not rotate only along the center thereof. The shaft (10), the direction axis is normalized. Others, the skilled person may make other changes within the spirit of the invention. Changes made in accordance with the spirit of the invention are intended to be included within the scope of the invention. The requirements of the invention patents, according to the law, can not limit the case by this; Ming: The preferred implementer: the person of the art, according to the spirit of the invention = this: ❹ should cover the following patent application Within the scope. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a first embodiment of the present invention. FIG. 2 is a schematic view showing the structure of a lens module in FIG. Figure 4 is an exploded view of the structure of the present invention. Fig. 5 is an exploded perspective view showing the first lens wedge group of the present invention. Take the mirror in Figure 5; the structure diagram of Group C. Figure 7 is a cross-sectional view of a first embodiment of the present invention. The exploded view of the lens module in the first example. 16 200938893 [Main component symbol description] / Lens module • Mirror base Tube rotation unit Restriction plate Receptacle tube accommodating chamber Top accommodating chamber Bottom accommodating chamber Circuit board Image sensor Opening First side wall
第三側壁 第四侧壁 第一定位單元 承載台 鏡片 主體部 前端部 外螺紋 10、10a、10b 20 ' 20a ' 20b 30、30a、30b 40、40a ' 40b 50 、 50b 21 、 21b 210 、 210b 2100 、 2100a 、 2100b 2102 、 2102b 60 、 60b 70 ' 70b 212 、 212a 、 212b 2122、2122a、2122b 2123 、 2123a 、 2123b 2124 、 2124a 、 2124b 2125 22 > 22a > 22b 214 、 214b 32、32b 302 ' 302b 304 、 304b 3021 ' 3021b 17 200938893 光圈孔 3041 第二定位單元 3042、3042a ' 3042b 第一旋轉筒 41、41a、41b 凸柄 42、42a、42b 内螺紋 410、410b 通孔 501 定位孔 502 ' 502b 第二旋轉筒 43 〇 18Third side wall fourth side wall first positioning unit carrier table main body portion front end external thread 10, 10a, 10b 20 ' 20a ' 20b 30, 30a, 30b 40, 40a ' 40b 50 , 50b 21 , 21b 210 , 210b 2100 , 2100a , 2100b 2102 , 2102b 60 , 60b 70 ' 70b 212 , 212a , 212b 2122 , 2122a , 2122b 2123 , 2123a , 2123b 2124 , 2124a , 2124b 2125 22 > 22a > 22b 214 , 214b 32 , 32b 302 ' 302b 304, 304b 3021 ' 3021b 17 200938893 aperture hole 3041 second positioning unit 3042, 3042a ' 3042b first rotating cylinder 41, 41a, 41b male shank 42, 42a, 42b internal thread 410, 410b through hole 501 positioning hole 502 ' 502b Two rotating cylinders 43 〇18