201111895 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種鏡頭模組，尤其是一種自動對焦鏡頭模 組0 【先前技術】 [0002] 現有自動對焦鏡頭模組多採用音圈馬達，究其原因在於 音圈馬達技術成熟及其價格低廉、體積小及用電量少等 〇 [0003] 常見的音圈馬達主要包括一固定架及一個可活動地裝設 於該固定架内的裝筒。該裝筒用來裝設鏡頭模組，裝筒 具有内螺紋，鏡頭模組具有外螺紋，鏡頭模組通過内螺 紋和外螺紋的配合裝設在裝筒内。在通電的情況下，該 音圈馬達驅動裝筒從而改變鏡頭模組與影像感測器之間 的距離，進而實現對焦或變焦的功能。 [0004] 鏡頭模組與裝筒在鎖附過程中，問題之一，内螺紋和外 螺紋之間由於扭力的存在使得鏡頭模組與裝筒二者之中 〇 心軸發生傾斜；問題之二，螺紋的相互螺合因摩擦產生 塵粒易污染鏡片。利用音圈馬達驅動鏡頭模組，需要較 大空間來容納音圈馬達從而使得自動對焦鏡頭模組的體 積較大。 【發明内容】 [0005] 有鑒於此，有必要提供一種體積小、無塵粒污染的自動 對焦鏡頭模組及相機模組。 [0006] 一種自動對焦鏡頭模組，其包括鏡筒、鏡座、彈性件和 098133060 表單編號A0101 第3頁/共14頁 0982056615-0 201111895 廉電致動器’所述壓電致動器具有沿所述鏡座軸向的形 變量’所述彈性件分別與所述鏡筒和鏡座相連接以使所 述鏡筒懸吊在所述鏡座内，所述鏡筒外壁徑向延伸形成 炱少一個支柱，所述壓電致動器設置在所述鏡座内且與 所述支柱相接觸用以驅動所述鏡筒在所述鏡座内軸向運 動。 [0007] 與先前技術相比，本發明實施例的自動對焦鏡頭模組由 於直接將鏡筒利用彈性件懸吊在鏡座内，鏡筒和鏡座之 間無扭力配合的問題及—者鎖附.時.因摩擦產生塵粒的問 題，由於壓電致動|§设置在鏡座.内，不需要額外的空間 收容壓電致動器’從而使得自動對焦鏡頭模組的體積較 小。 !ili 【實施方式】 [0008] 下面將結合附圖對本發明作進一步詳細說明。 [〇〇〇9]請參閱圖1，本發明第一實施例的自動對焦j鏡頭模組10包 括鏡琦11、鏡座12 '彈性件13、磁場感應器14、磁鐵15 和壓電致動器16。 [〇〇1〇]鏡筒11内設置有一個或複數鏡片Π0，磁場感應器14設置 在鏡筒11的外表面，隨鏡筒11移動而移動。鏡筒u的外 表面徑向突出形成有支柱111 ’另外’鏡筒U靠近物侧的 端部形成有兩個對稱分佈的第一凸柱112。 [0011] 鏡座12靠近物侧的端部形成有三個等間距分佈的第二凸 柱121，且具有一個收容鏡筒11的收容空間12〇。 [0012] 磁鐵15固定在鏡座12的内壁上並且使得磁場感應器14位 098133060 第4頁/共14頁 表單編號A0101 201111895 [0013] [0014] Ο [0015] Ο 於磁鐵15的磁場範圍内，磁場感應器14感應磁場的變化 以確定鏡筒11在鏡座12中的位置。 彈性件13具有中央通孔13〇、圍繞中央通孔13〇的固定部 131和可動部132。其中，中央通孔130用以使得光線可 照射至鏡片110上，可動部132上設置有數量與第一凸柱 11 2相同的第一固定孔134，固定部131上設置有數量與 第二凸柱121相同的第二固定孔133。 第一凸柱112伸入第一固定孔134，然後在第一凸柱112 和第一固定孔13 4之間塗佈膠水，膝水固化從而使可動部 132固定在鏡筒11上；第二凸柱121伸入第二固定孔133 ’同樣在二者之間塗佈膠水使固定部丨31固定在鏡座12上 ’在彈性件13的作用下使得鏡筒丨丨懸吊在鏡座丨2的收容 空間120内。 壓電致動器16固定在罈座12内壁上，其具有沿鏡座12軸 向的形變量，且與支柱111相接觸，壓電動器16與支柱 111的接觸方式及固定方式只要能後壓龠致動器16帶動支 柱111移動且不錯位元不脫離的方式即可，例如，採用膠 水將壓電致動器16與支柱ill膠合在一起。壓電致動器16 在電流或電壓的作用下’發生機械形變用以驅動鏡筒U 沿鏡座12的軸向上下運動實現自動對焦鏡頭模組丨〇的對 焦功能。 隨著鏡筒11在鏡座12中的位置不同，磁場感應器14所檢 測的其所處位置的磁場強度亦不相同，資料處理單元（ 圖未示）接受並處理該資料以判斷鏡筒丨丨所處的位置， 098133060 表單編號A0101 第5頁/共14頁 0982056615-0 [0016] 201111895 進而控制壓電致動器1 6的機械形變從而實現精確的對焦 功能。 [0017] 由於直接將帶有鏡片110的鏡筒11利用彈性件13懸吊在鏡 座12内，鏡筒11和鏡座12之間無扭力配合的問題及二者 鎖附時因摩擦產生塵粒的問題；由於壓電致動器16設置 - 在鏡座12内，不需要額外的空間收容壓電致動器16，從 。 而使得自動對焦鏡頭模組10的體積較小。 [0018] 如圖2所示，本發明第二實施例的自動對焦鏡頭模組20包201111895 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a lens module, and more particularly to an autofocus lens module 0. [Prior Art] [0002] Existing autofocus lens modules use voice coils The reason for the motor is that the voice coil motor is mature and its price is low, the volume is small, and the power consumption is small. [0003] The common voice coil motor mainly includes a fixed frame and a movable device mounted in the fixed frame. Loading tube. The barrel is used for mounting a lens module, the barrel has an internal thread, the lens module has an external thread, and the lens module is mounted in the barrel by the inner thread and the external thread. In the case of power-on, the voice coil motor drives the cartridge to change the distance between the lens module and the image sensor, thereby achieving focus or zoom. [0004] One of the problems in the process of attaching the lens module and the loading cylinder is that the twisting force between the internal thread and the external thread causes the tilting of the shaft of the lens module and the loading cylinder; The mutual screwing of the threads causes dust particles to easily contaminate the lens due to friction. Driving the lens module with a voice coil motor requires a large space to accommodate the voice coil motor, resulting in a larger volume of the autofocus lens module. SUMMARY OF THE INVENTION [0005] In view of this, it is necessary to provide an autofocus lens module and a camera module that are small in size and free from dust particles. [0006] An autofocus lens module comprising a lens barrel, a lens holder, an elastic member, and a 098133060 Form No. A0101, Page 3 of 14 0982056615-0 201111895, an electric actuator, said piezoelectric actuator having The elastic member along the axial direction of the lens holder is respectively connected to the lens barrel and the lens holder to suspend the lens barrel in the lens holder, and the outer wall of the lens barrel is radially extended to form A post is reduced, the piezoelectric actuator being disposed within the mirror mount and in contact with the post for driving the lens barrel to move axially within the mirror mount. [0007] Compared with the prior art, the autofocus lens module of the embodiment of the present invention directly suspends the lens barrel in the lens holder by using an elastic member, and has no problem of torque cooperation between the lens barrel and the lens holder and the lock Attached. Due to the problem of dust generation due to friction, since the piezoelectric actuation|§ is set in the lens holder, no additional space is required to accommodate the piezoelectric actuator', so that the autofocus lens module is small in size. [Improvement] [0008] The present invention will be further described in detail below with reference to the accompanying drawings. [9] Referring to FIG. 1, an autofocus j lens module 10 according to a first embodiment of the present invention includes a mirror 11, a lens holder 12' elastic member 13, a magnetic field sensor 14, a magnet 15, and a piezoelectric actuator. 16. [〇〇1〇] One or a plurality of lenses Π0 are provided in the lens barrel 11, and the magnetic field sensor 14 is disposed on the outer surface of the lens barrel 11, and moves as the lens barrel 11 moves. The outer surface of the lens barrel u is radially protruded to form a post 111'. Further, the end portion of the barrel U near the object side is formed with two symmetrically distributed first studs 112. [0011] The end portion of the lens holder 12 adjacent to the object side is formed with three second protrusions 121 equally spaced, and has a receiving space 12〇 for housing the lens barrel 11. [0012] The magnet 15 is fixed on the inner wall of the lens holder 12 and makes the magnetic field sensor 14 position 098133060 page 4 / total 14 page form number A0101 201111895 [0013] [0014] Ο [0015] 磁场 within the magnetic field of the magnet 15 The magnetic field sensor 14 induces a change in the magnetic field to determine the position of the lens barrel 11 in the lens holder 12. The elastic member 13 has a central through hole 13A, a fixing portion 131 surrounding the central through hole 13A, and a movable portion 132. The central through hole 130 is configured to enable the light to be irradiated onto the lens 110. The movable portion 132 is provided with the same number of first fixing holes 134 as the first protrusion 11 2 , and the fixing portion 131 is provided with the number and the second protruding column 121 the same second fixing hole 133. The first protrusion 112 protrudes into the first fixing hole 134, and then glue is applied between the first protrusion 112 and the first fixing hole 13 4 , and the knee water is solidified to fix the movable portion 132 on the lens barrel 11; The protrusion 121 protrudes into the second fixing hole 133'. The glue is also applied between the two to fix the fixing portion 31 on the lens holder 12. Under the action of the elastic member 13, the lens barrel is suspended by the lens holder. 2 accommodating space 120. The piezoelectric actuator 16 is fixed on the inner wall of the yoke 12, has a shape variable along the axial direction of the lens holder 12, and is in contact with the strut 111. The contact mode and the fixing manner of the piezoelectric actuator 16 and the struts 111 are as long as they can be pressed. The 龠 actuator 16 can move the struts 111 in a manner that does not detach from the locating elements. For example, the piezoelectric actuator 16 and the stru ill are glued together using glue. The piezoelectric actuator 16 undergoes mechanical deformation under the action of current or voltage to drive the lens barrel U to move up and down along the axial direction of the lens holder 12 to realize the focus function of the autofocus lens module. As the position of the lens barrel 11 in the lens holder 12 is different, the magnetic field strength of the position detected by the magnetic field sensor 14 is also different, and the data processing unit (not shown) accepts and processes the data to determine the lens barrel.丨Location, 098133060 Form No. A0101 Page 5 of 14 0982056615-0 [0016] 201111895 In turn, the mechanical deformation of the piezoelectric actuator 16 is controlled to achieve an accurate focusing function. [0017] Since the lens barrel 11 with the lens 110 is directly suspended in the lens holder 12 by the elastic member 13, the problem of no torque fit between the lens barrel 11 and the lens holder 12 and the dust generated by friction when the two are locked The problem of the granules; since the piezoelectric actuator 16 is disposed - in the mirror mount 12, no additional space is required to accommodate the piezoelectric actuator 16, from. The autofocus lens module 10 is made smaller in size. [0018] As shown in FIG. 2, the autofocus lens module 20 package of the second embodiment of the present invention
括鏡筒21、鏡座22、彈性件23、磁場感應器24、磁鐵25 Q 和壓電致動器26，其與自動對焦鏡頭模組10的區別在於 :磁場感應器24固定在鏡座22内壁上，而磁鐵25固定在 鏡筒21外壁上隨鏡筒21而移動；鏡座22的内壁具有軸向 的凹槽221，壓電致動器26固定在凹槽221内，當鏡筒21 在彈性件23的作用下懸吊在鏡座22中時支柱211部分或全 部收容在凹槽221内且壓電致動器26與支柱211相接觸。 [0019] 凹槽221可導引支柱211的運動，進而引導鏡筒21的運動 , il 〇 [0020] 如圖3所示，本發明第三實施例的自動對焦鏡頭模組30包 括鏡筒31、鏡座32、第一彈性件33a、第二彈性件33b、 磁場感應器34、磁鐵35和三個壓電致動器36。其中，磁 鐵35和三個壓電致動器36均固定在鏡座32内，磁場感應 器34固定在鏡筒31的外表面。 [0021] 鏡筒31的外表面徑向突出形成有三個支柱311，相鄰支柱 311之間的夾角為120度，當鏡筒31借助第一彈性件33a 098133060 表單編號A0101 第6頁/共14頁 0982056615-0 201111895 、第二彈性件33b懸吊在鏡座32中時，三個支柱311與三 個壓電致動器36相對應，即一個壓電致動器36與一個支 挺311相接觸。第一彈性件33a固定在鏡筒31和鏡座32靠 近物侧的一端，第二彈性件33b定在鏡筒31和鏡座32靠近 像側的一端。 [〇〇22] 由於採用三個均勻分佈的支柱311和壓電致動器36，可以 防止鏡筒31在軸向運動時發生傾斜，保證對焦的準確度 0 [0〇23]第一彈片33a和第二彈片33b的結構和形狀可以相同也可 以不相同；鏡座32内壁也可以開設轴向凹槽以引導支柱 311的運動。 [〇〇24]另外，支柱311的個數也並不限於三個，可以根據實際要 求改變，例如兩個、四個、五個等等。 [0025] 綜上所述，本發明確已符合發明專利之要件，遂依法提 出專利申請。惟，以上所述者僅為本梦明之較佳實施方 〇 式’自不能以此限制本案之申請專利範圍《舉凡熟悉本 案技藝之人士援依本發明之精神所作之等效修飾或變化 ’皆應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 [26] 圖1是本發明第一實施例自動對焦鏡頭模組的示意圖。 [0〇27]圖2是本發明第二實施例自動對焦鏡頭模組的示意圖。 [〇〇28]圖3是本發明第三實施例自動對焦鏡頭模組的示意圖。 【主要元件符號說明】 098133060 表單編號A0101 0982056615-0 201111895 [0029] 自動對焦鏡頭模組：10 ' 20 ' 30 [0030] 鏡筒：11、21、31 [0031] 鏡座：12、22、32 [0032] 彈性件：13、23 [0033] 磁場感應器：14、2 4、 34 [0034] 磁鐵：15、25、35 [0035] 壓電致動器：16、26、 36 [0036] 鏡片：110 [0037] 支柱：111、211、311 [0038] 第一凸柱：112 [0039] 第二凸柱：121 [0040] 收容空間：120 [0041] 中央通孔：130 [0042] 固定部：131 [0043] 可動部：132 [0044] 第一固定孔：134 [0045] 第二固定孔：13 3 [0046] 凹槽：221 [0047] 第一彈性件：33aThe lens barrel 21, the lens holder 22, the elastic member 23, the magnetic field sensor 24, the magnet 25 Q and the piezoelectric actuator 26 are different from the autofocus lens module 10 in that the magnetic field sensor 24 is fixed to the lens holder 22 On the inner wall, the magnet 25 is fixed on the outer wall of the lens barrel 21 and moves with the lens barrel 21; the inner wall of the lens holder 22 has an axial groove 221, and the piezoelectric actuator 26 is fixed in the groove 221 when the lens barrel 21 When the elastic member 23 is suspended in the lens holder 22, the pillar 211 is partially or entirely housed in the recess 221 and the piezoelectric actuator 26 is in contact with the pillar 211. [0019] The groove 221 can guide the movement of the pillar 211, thereby guiding the movement of the lens barrel 21, il 〇 [0020] As shown in FIG. 3, the autofocus lens module 30 of the third embodiment of the present invention includes a lens barrel 31. The mirror holder 32, the first elastic member 33a, the second elastic member 33b, the magnetic field sensor 34, the magnet 35, and the three piezoelectric actuators 36. Here, the magnet 35 and the three piezoelectric actuators 36 are both fixed in the lens holder 32, and the magnetic field sensor 34 is fixed to the outer surface of the lens barrel 31. [0021] The outer surface of the lens barrel 31 is radially protruded to form three pillars 311, and the angle between the adjacent pillars 311 is 120 degrees, when the lens barrel 31 is formed by the first elastic member 33a 098133060, the form number A0101, page 6 of 14 Page 0992056615-0 201111895 When the second elastic member 33b is suspended in the lens holder 32, the three pillars 311 correspond to the three piezoelectric actuators 36, that is, one piezoelectric actuator 36 and one support 311 contact. The first elastic member 33a is fixed to one end of the lens barrel 31 and the lens holder 32 on the object side, and the second elastic member 33b is positioned at one end of the lens barrel 31 and the lens holder 32 on the image side. [〇〇22] Since three uniformly distributed pillars 311 and piezoelectric actuators 36 are employed, it is possible to prevent the lens barrel 31 from tilting in the axial movement, and to ensure the accuracy of focusing 0 [0〇23] the first elastic piece 33a The structure and shape of the second elastic piece 33b may be the same or different; the inner wall of the lens holder 32 may also have an axial groove to guide the movement of the support 311. [〇〇24] In addition, the number of the pillars 311 is not limited to three, and may be changed according to actual requirements, for example, two, four, five, and the like. [0025] In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above is only the preferred implementation of this dream. 'There is no way to limit the scope of the patent application in this case. 'Equivalent modifications or changes made by those who are familiar with the skill of the present invention in accordance with the spirit of the present invention' It should be covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS [26] FIG. 1 is a schematic view of an autofocus lens module according to a first embodiment of the present invention. 2 is a schematic view of an autofocus lens module according to a second embodiment of the present invention. FIG. 3 is a schematic diagram of an autofocus lens module according to a third embodiment of the present invention. [Main component symbol description] 098133060 Form number A0101 0982056615-0 201111895 [0029] Autofocus lens module: 10 ' 20 ' 30 [0030] Lens barrel: 11, 21, 31 [0031] Mirror holder: 12, 22, 32 [0032] Elastic members: 13, 23 [0033] Magnetic field sensors: 14, 2 4, 34 [0034] Magnets: 15, 25, 35 [0035] Piezoelectric actuators: 16, 26, 36 [0036] Lenses : 110 [0037] Pillar: 111, 211, 311 [0038] First stud: 112 [0039] Second stud: 121 [0040] Containing space: 120 [0041] Central through hole: 130 [0042] Fixing part: 131 [0043] movable portion: 132 [0044] first fixing hole: 134 [0045] second fixing hole: 13 3 [0046] groove: 221 [0047] first elastic member: 33a
Ο y 098133060 表單編號Α0101 第8頁/共14頁 0982056615-0 201111895 [0048] 第二彈性件：33bΟ y 098133060 Form No. Α0101 Page 8 of 14 0982056615-0 201111895 [0048] Second elastic part: 33b
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098133060 表單編號A0101 第9頁/共14頁 0982056615-0098133060 Form No. A0101 Page 9 of 14 0982056615-0