201106582 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種音圈馬達，尤其是一種體積小、性能良 好的音圈馬達以及包含該音圈馬達的相機模組。 【先前技術·】 [0002] 音圈馬達具有體積小、用電量少及價格低廉等優點，適 合作為電子產品（如數碼相機、手機、數碼攝像機等） 中的致動器（請參見Design of a voice coil motor used in the focusing system of a digital o video camera ， Magnetics, IEEE Transactions on Volume 41, Issue 10, Oct. 2005 Page(s):3979 - 3981)。 [0003] 常見的音圈馬達主要包括一個固定架及一個可活動地裝 設於該固定架内的裝筒及至少一個彈片。該裝筒用來裝 設鏡筒或對焦鏡片組或變焦鏡片組等元件，該彈片用來 保護鏡筒或對焦鏡片組或變焦鏡片組等。固定架上設置 磁鐵，裝筒上繞設有線圈，在線圈通電的情況下，線圈 〇 與磁鐵之間產生磁力，從而使裝筒在固定架内發生位移 以改變鏡筒或對焦鏡片組或變焦鏡片組與影像感測器之 間的距離，進而實現對焦或變焦的功能。 [0004] 由於音圈馬達的磁鐵位於線圈外部，磁場不僅影響音圈 馬達中其他結構的性能，而且磁鐵的N (北）極、S (南 )極之間磁路較遠從而使得音圈馬達體積較大。 【發明内容】 [0005] 有鑒於此，提供一種體積較小、性能良好的音圈馬達及 098127202 表單編號A0101 第4頁/共12頁 0982046605-0 201106582 相機模組實為必要。 [0006] 一種音圈馬達’其包括：固定元件，其包括一個固定架 和至少一個線圈，所述至少一個線圈设置在所述固定架 上；活動元件，其包括一個裝筒和至少一個磁鐵，所述 裝筒穿設在所述固定架中’所述磁鐵設置在所述裝筒上 ’所述磁鐵包括分離的上下疊置的第一磁性元件和第二 磁性元件，所述第一磁性元件的具有第一極性，所述第 二磁性元件具有與第一極性相反的第二極性。 〇 [0007] 一種相機模組，其包括音圈馬達，鉼述音圈馬達包括： 固定元件，其包括二個固定架和至少一個線圈，所述至 少一個線圈設置在所述固定:架上；活動.元件，其包括一 個裝筒和至少一個磁鐵，所述裝筒穿設在所述固定架中 ，所述磁鐵設置在所述裝筒上，所述磁鐵包括分離的上 下疊置的第一磁性元件和第二磁性元件，所述第—磁性 元件的具有第一極性，所述第二礙性元件具有與第一極 性相反的第二極性。 〇 :: [0008] 與先前技術相比，本發明實施例—的音圈馬達採用線圈設 置在固定部上以將磁鐵包圍在線圈之中，可以使得磁鐵 與外界隔離絕緣，並可使磁鐵内的電感穩定及增大耐壓 能力，由於磁鐵具有分離疊置在一起的第—磁性元件和 第二磁性元件，使得N極、S極之間磁路較近，從而可達 到縮小產品尺寸及減少製造工時的效果。 【實施方式】 [0009]請參閱圖1及圖2，本發明實施例所提供的音圈馬達1〇〇用 來在相機模組中驅動鏡片或者鏡頭模組移動。 0982046605-0 098127202 表單編號A0101 第5頁/共12頁 201106582 [0010] 音圈馬達100包括殼體10、活動元件20、固定元件30、 上彈片40a、下彈片40b和承載體50。 [0011] 該殼體10用於消除外部電磁對該音圈馬達100的幹擾並防 止音圈馬達100的電磁影響其外部電子元件的工作。 [0012] 殼體10具有一個底座11和四個垂直底座11的第一側壁12 ，底座11和第一側壁12形成一個用來容納活動元件20和 固定元件30的容置空間。底座11的幾何中心設有一個通 孔110，以用於光線入射到鏡片或者鏡頭模組上。殼體10 與承載體50相配合以將固定元件30、活動元件20、上彈 〇 片40a及下彈片40b收容在容置空間内。 [0013] 活動組件20包括裝筒21和四個磁鐵22，磁鐵22設置在裝 筒21上。裝筒21為方形結構，其具有一個大致呈圓形的 第一容置腔210，第一容置腔210用來容納鏡片或者鏡頭 模組。四個磁鐵22分別位於裝筒21的四個表面，每一個 磁鐵22均包括一個第一磁性元件221和一個第二磁性元件 222，第一磁性元件221與第二磁性元件222是分離的且 上下疊置在一起，第一磁性元件221具有第一極性，第二 磁性元件222具有與第一極性相反的第二極性，如第一磁 性元件221為N極、第二磁性元件222為S極，或者第一磁 性元件221為S極、第二磁性元件222為N極。由於磁鐵22 具有第一磁性元件221和第二磁性元件222，從而使得N極 、S極之間磁路較近。 [0014] 磁鐵22的個數並不限於四個，可以根據裝筒21的形狀作 相應改變，例如，當裝筒21為圓形時，磁鐵22的個數為 098127202 表單編號A0101 第6頁/共12頁 0982046605-0 201106582 一個且是圓環形狀；當裝筒21為三棱柱時，磁鐵22的個 數為三個。 [0015] 固定組件30包括固定架31及四個裝設於固定架31上的線 圈32,固定架31是一個呈方筒狀的架體。固定架31具有 四個第二側壁320，四個第二側壁320相連限定一個第二 容置腔310，第二容置腔310用來容納活動元件20，每個 第二侧壁320上具有一個放置線圈32的容置槽321。 [0016] ❹ [0017] 當磁鐵22的個數發生變化時，線圈32個數相應發生變化 ，但要保持個數與磁鐵22的個數相同。 上彈片40a和下彈片40b的結構、形狀相同，均包括中央 通孔410、圍繞中央通孔410的固定部411和可動部412， 可動部412受到外力時被撓曲變形，當外力消失後，其均 可恢復原始狀態。中央通孔410用於光線入射到鏡片或者 鏡頭模組上。固定部411固定在固定架31上，可動部412 固定在裝筒21上，從而使得活動元件20懸掛在固定元件 30内。 〇 [0018] 當然，也可以只包括一個彈片，如上彈片40a或者下彈片 40b ;上彈片40a和下彈片40b的結構和形狀也可以不相 同。 [0019] 由於磁鐵22設置在音圈馬達10的活動組件20上，線圈32 設置在固定組件30上，線圈32將磁鐵22包圍其中，從而 使得磁鐵22與外界隔離絕緣，並可使磁鐵22内的磁場穩 定及增大耐壓能力，可達到縮小產品尺寸及減少製造工 時的效果。 098127202 表單編號A0101 第7頁/共12頁 0982046605-0 201106582 [0020] 综上所述，本發明確已符合發明專利之要件，遂依法提 出專利申請。惟，以上所述者僅為本發明之較佳實施方 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】 [0021] 圖1是本發明實施例音圈馬達的立體示意圖。 [0022] 圖2是本發明實施例音圈馬達的分解圖。 【主要元件符號說明】 音圈馬達 100 殼:It , Γ'.;... ,AV... 10 .. . 活動組件 .： ........'厂 20 固定組件 30 上彈片 40a 下彈片 40b 承載體 50 底座 11 第一侧壁 12 通孔 110 裝筒 21 磁鐵 22 第一容置腔 210 第一磁性元件 221 第二磁性元件 222 固定架 31 表單編號A0101 第8頁/共12頁 0982046605-0 098127202 線圈 32 第二側壁 320 第二容置腔 310 容置槽 321 中央通孔 410 固定部 411 可動部 412 201106582 Ο 098127202 表單編號Α0101 第9頁/共12頁 0982046605-0201106582 VI. Description of the Invention: [Technical Field] The present invention relates to a voice coil motor, and more particularly to a voice coil motor having a small size and good performance, and a camera module including the voice coil motor. [Prior Art·] [0002] The voice coil motor has the advantages of small size, low power consumption, and low price, and is suitable as an actuator in electronic products (such as digital cameras, mobile phones, digital video cameras, etc.) (see Design of a voice coil motor used in the focusing system of a digital o video camera , Magnetics, IEEE Transactions on Volume 41, Issue 10, Oct. 2005 Page(s): 3979 - 3981). [0003] A common voice coil motor mainly includes a holder and a barrel movably mounted in the holder and at least one elastic piece. The cartridge is used to mount components such as a lens barrel or a focus lens group or a zoom lens group, which is used to protect the lens barrel or the focus lens group or the zoom lens group. A magnet is arranged on the fixing frame, and a coil is arranged around the charging cylinder. When the coil is energized, a magnetic force is generated between the coil cymbal and the magnet, so that the loading cylinder is displaced in the fixing frame to change the lens barrel or the focus lens group or zoom. The distance between the lens group and the image sensor, which enables focus or zoom. [0004] Since the magnet of the voice coil motor is located outside the coil, the magnetic field not only affects the performance of other structures in the voice coil motor, but also the magnetic circuit between the N (north) pole and the S (south) pole of the magnet is far away to make the voice coil motor Larger size. SUMMARY OF THE INVENTION [0005] In view of this, a voice coil motor with a small size and good performance is provided and 098127202 Form No. A0101 Page 4 of 12 0982046605-0 201106582 A camera module is necessary. [0006] A voice coil motor includes: a fixing member including a holder and at least one coil, the at least one coil being disposed on the holder; a movable member including a barrel and at least one magnet, The cartridge is disposed in the holder. The magnet is disposed on the cartridge. The magnet includes separate first and second magnetic components and a second magnetic component. The first magnetic component Having a first polarity, the second magnetic element has a second polarity opposite the first polarity. [0007] A camera module comprising a voice coil motor, the voice coil motor comprising: a fixing member comprising two fixing brackets and at least one coil, the at least one coil being disposed on the fixing: the frame; An activity component comprising a cartridge and at least one magnet, the cartridge being disposed in the holder, the magnet being disposed on the cartridge, the magnet comprising a first stacked upper and lower a magnetic element and a second magnetic element, the first magnetic element having a first polarity, the second insulative element having a second polarity opposite the first polarity. 〇: [0008] Compared with the prior art, the voice coil motor of the embodiment of the present invention uses a coil disposed on the fixing portion to surround the magnet in the coil, so that the magnet can be insulated from the outside and can be inside the magnet. The inductance is stabilized and the withstand voltage is increased. Since the magnet has the first magnetic element and the second magnetic element which are separated and stacked together, the magnetic circuit between the N pole and the S pole is relatively close, thereby reducing the size and reducing the product. The effect of manufacturing man-hours. [Embodiment] Referring to FIG. 1 and FIG. 2, a voice coil motor 1 according to an embodiment of the present invention is used to drive a lens or a lens module to move in a camera module. 0982046605-0 098127202 Form No. A0101 Page 5 of 12 201106582 [0010] The voice coil motor 100 includes a housing 10, a movable member 20, a fixing member 30, a resilient piece 40a, a lower elastic piece 40b, and a carrier 50. [0011] The housing 10 serves to eliminate external electromagnetic interference with the voice coil motor 100 and to prevent the electromagnetic of the voice coil motor 100 from affecting the operation of its external electronic components. The housing 10 has a base 11 and a first side wall 12 of four vertical bases 11, and the base 11 and the first side wall 12 define an accommodation space for receiving the movable member 20 and the fixing member 30. The geometric center of the base 11 is provided with a through hole 110 for incident light onto the lens or lens module. The housing 10 cooperates with the carrier 50 to accommodate the fixing member 30, the movable member 20, the upper elastic piece 40a, and the lower elastic piece 40b in the accommodating space. [0013] The movable assembly 20 includes a barrel 21 and four magnets 22, and the magnet 22 is disposed on the barrel 21. The cartridge 21 has a square structure and has a substantially circular first accommodating cavity 210 for receiving a lens or a lens module. The four magnets 22 are respectively located on the four surfaces of the loading cylinder 21, and each of the magnets 22 includes a first magnetic element 221 and a second magnetic element 222. The first magnetic element 221 and the second magnetic element 222 are separated and up and down. Stacked together, the first magnetic element 221 has a first polarity, and the second magnetic element 222 has a second polarity opposite to the first polarity, such as the first magnetic element 221 being an N pole and the second magnetic element 222 being an S pole. Alternatively, the first magnetic element 221 is an S pole and the second magnetic element 222 is an N pole. Since the magnet 22 has the first magnetic member 221 and the second magnetic member 222, the magnetic paths between the N pole and the S pole are relatively close. [0014] The number of the magnets 22 is not limited to four, and may be changed according to the shape of the loading cylinder 21. For example, when the loading cylinder 21 is circular, the number of the magnets 22 is 098127202. Form No. A0101 Page 6 / A total of 12 pages 0982046605-0 201106582 one is a ring shape; when the barrel 21 is a triangular prism, the number of magnets 22 is three. [0015] The fixing assembly 30 includes a fixing frame 31 and four coils 32 mounted on the fixing frame 31. The fixing frame 31 is a frame body having a rectangular tube shape. The fixing frame 31 has four second side walls 320, and the four second side walls 320 are connected to define a second accommodating cavity 310 for accommodating the movable element 20, and each of the second side walls 320 has one The accommodating groove 321 of the coil 32 is placed. [0016] When the number of the magnets 22 changes, the number of the coils 32 changes correspondingly, but the number of the coils is kept the same as the number of the magnets 22. The upper elastic piece 40a and the lower elastic piece 40b have the same structure and shape, and each includes a central through hole 410, a fixing portion 411 surrounding the central through hole 410, and a movable portion 412. The movable portion 412 is flexibly deformed when subjected to an external force, and when the external force disappears, The original state can be restored. The central through hole 410 is for incident light onto the lens or lens module. The fixing portion 411 is fixed to the holder 31, and the movable portion 412 is fixed to the barrel 21 so that the movable member 20 is suspended in the fixing member 30. [0018] Of course, it is also possible to include only one elastic piece, such as the elastic piece 40a or the lower elastic piece 40b; the structure and shape of the upper elastic piece 40a and the lower elastic piece 40b may also be different. [0019] Since the magnet 22 is disposed on the movable assembly 20 of the voice coil motor 10, the coil 32 is disposed on the fixed assembly 30, and the coil 32 surrounds the magnet 22, thereby isolating the magnet 22 from the outside and allowing the magnet 22 to be inside. The magnetic field is stabilized and the pressure resistance is increased, which can reduce the size of the product and reduce the manufacturing man-hour. 098127202 Form No. A0101 Page 7 of 12 0982046605-0 201106582 [0020] 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 description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0021] FIG. 1 is a perspective view of a voice coil motor according to an embodiment of the present invention. 2 is an exploded view of a voice coil motor in accordance with an embodiment of the present invention. [Main component symbol description] Voice coil motor 100 Case: It, Γ'.;...,AV... 10 .. . Active component.: ........'Factory 20 Fixed component 30 Upper shrapnel 40a Lower shrapnel 40b Carrier 50 Base 11 First side wall 12 Through hole 110 Cartridge 21 Magnet 22 First accommodating cavity 210 First magnetic element 221 Second magnetic element 222 Fixing frame 31 Form No. A0101 Page 8 of 12 Page 0992046605-0 098127202 Coil 32 Second side wall 320 Second accommodating cavity 310 accommodating groove 321 Central through hole 410 Fixing portion 411 Movable portion 412 201106582 Ο 098127202 Form No. 1010101 Page 9/Total 12 Page 0982046605-0