201021374 : 九、發明說明： • 【發明所屬之技術領域】 本發明涉及一種音圈馬達，尤其涉及一種體積較小、 便於組裝之音圈馬達。 【先前技術】 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（如數位相機、行動電話、數位攝像機 等）中之致動器（請參見 Design of a voice coil motor used in G the focusing system of a digital video camera > Magnetics, IEEE Transactions on Volume 41, Issue 10, Oct. 2005 Page(s):3979 - 3981) 〇 常見之音圈馬達主要包括一兩端開口之固定架及一可 活動地裝設於該固定架内之兩端開口之活動裝筒、一彈 片、用於承載該固定架、活動裝筒及彈片之且與該固定架 相固定之承載體及與承載體配合使用之外殼。該活動裝筒 用來裝設鏡頭模組中之鏡筒或變焦鏡片等元件。該彈片具 有一板體，該板體之中央開設有一通孔，該板體具有一遠 離該通孔、且圍繞該通孔之外侧固定部，一鄰近該通孔、 且圍繞該通孔之内侧連接部及位於該外侧固定部與該内侧 連接部之間複數個彈力部，該外侧固定部與該固定架靠近 該承載體之端部固接為一體，該内侧連接部與該活動裝筒 靠近該承載體之端部固接為一體。該承載體與該外殼相配 合形成一收容空間，該收容空間用於收容該固定架、活動 裝筒及彈片。 7 201021374 ;通電障况下’該線圈於磁鐵產生之磁場#受到力之 作用，帶動活動裝筒沿以心、財向運動，從而改變裝設 命動裝筒内之鏡筒與影像感測器之間之距離或變焦鏡片 與其他鏡片之間之㈣，進而實輯焦或變焦之功能。201021374: IX. Description of the invention: • Technical field to which the invention pertains The present invention relates to a voice coil motor, and more particularly to a voice coil motor that is small in size and easy to assemble. [Prior Art] 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 cameras, etc.) (see Design of a voice coil). Motor used in G the focusing system of a digital video camera > Magnetics, IEEE Transactions on Volume 41, Issue 10, Oct. 2005 Page(s): 3979 - 3981) 〇 The common voice coil motor mainly includes a two-end opening a mounting bracket and a movable loading tube, a resilient piece, and a carrier for supporting the fixing frame, the movable loading tube and the elastic piece, and being fixed to the fixed frame The outer casing used in conjunction with the carrier. The movable barrel is used to mount components such as a lens barrel or a zoom lens in the lens module. The elastic piece has a plate body, and a through hole is defined in the center of the plate body, the plate body has a fixing portion away from the through hole and surrounding the outer side of the through hole, adjacent to the through hole and surrounding the inner side of the through hole a connecting portion and a plurality of elastic portions between the outer fixing portion and the inner connecting portion, the outer fixing portion being integrally fixed with the end portion of the fixing frame adjacent to the supporting body, the inner connecting portion being close to the movable loading tube The end of the carrier is fixedly integrated. The carrier body cooperates with the outer casing to form a receiving space for receiving the fixing frame, the movable loading tube and the elastic piece. 7 201021374 ; In the case of a power-on fault, the magnetic field generated by the coil in the magnet is subjected to a force, which drives the movable cylinder to move along the center and the fiscal direction, thereby changing the lens barrel and the image sensor in the installation of the life cylinder. The distance between the zoom lens and the other lens (four), and then the focus or zoom function.
傳統之音圈馬達中活動裝筒之一端具有四個定位柱， =四個U柱與彈片之内侧連接部上之定位孔相配合，以 將：活動裝筒與該彈片之内侧連接部固接為一體。同時， =疋Γ柱還有—订程限制功能’該行程限制功能使得組裝 <之於使用狀·4之音圈馬達之之活動裝筒於運動過程中 因接觸到外殼之頂板而受到限制。 為了滿足人們對行動電話輕薄短小之要求，用於行動 ，話中之g圈馬達亦應隨之縮小體積。惟，當音圈馬達之 局度降低時，其外殼必須降低高度，此時，於音圈馬達之 活動裝筒移動時，該活動裝筒之定位柱會很快接觸到外殼 使得該活動裝筒行㈣短1降低定位柱之高度行程可 較長’但此種做法使得該活動裝筒與彈片之間定位不易， 從而使得該音圈馬達之組裝過程較困難。 【發明内容】 有鑒於此，提供一種體積較小、便於組裝之音圈馬達 實為必要。 -種音圈馬達，其包括-頂板、—活動裝筒及一彈片， 該活動裝筒可沿垂直於該頂板之方向移動，該活動裝筒靠 近該頂板之端部具有至少-第錄，該彈片具有一板 體’該板體之中央設有—通孔，該㈣設有與該第一定位 8 201021374 :柱配合使用之第一定位孔以使該彈片之内侧與該活動裝筒 ，相定位，該活動裝筒靠近該頂板之端部進一步具有至少一 行程限制柱，該彈片之板體設有與該行程限制柱配合使用 之行程限制單元，以使該行程限制柱藉由該行程限制單元 穿過該彈片並接觸該頂板以限制該活動裝筒之移動距離。 與先前技術相比，本發明實施例所提供之活動裝筒之 第一定位柱與行程限制柱分別具有定位及行 從而使得該活動裝筒之行程易限制，且與該彈片制二定 位，直接使得該音圈馬達體積較小，較易組裝。 【實施方式】 5月一併參閱圖i、圖2及圖3，其為本發明實施例所提 供之音圈馬達1〇。該音圈馬達10包括：外殼2〇、一兩端 開口之固定裝組30、一活動地收容於該固定装組3〇内之活 動裝組40、兩個分別位於該固定裝組3〇之兩端之彈片％ 及與該固定裝組30固接為一體之承載體60。 φ 該外殼20用於消除外部電磁對該音圈馬達1〇之干擾 並防止該音圈馬達10之電磁影響其外部電子元件之工作。 該外殼20可藉由鎳鐵合金、導電塑膠、表面導電材料、導 電玻璃等磁遮罩材料製成。該外殼20具有一頂板22、兩個 設置於頂板22相對兩側之第一側板24及兩個設置於頂板 22之另外相對兩侧之第二侧板％。該頂板22、兩個第一侧 板24及兩個第二側板26形成一用來容置固定裝組3〇之容 置空間。該頂板22之幾何中心開設一通孔222，用於光線 穿過該頂板22。該頂板22上開設有四個貫穿部224。本實 9 201021374 施例中，該貫穿部224為ρ*ΐ π έΒ & 3 1朝向通孔222且與通孔222 連通之凹口。當然，該貫穿部 貝芽P 224亦可為與通孔222不連 通之通孔。 該固定裝組30具有一固定牟 ^ Λ Μ疋朱32及四塊裝設於固定架 32中之磁鐵34。該固定架32係一 ^ ^ „ 苄^係呈正方體筒狀之架體。 該固疋条32之四個方形側壁圍虚一 训芏固成第一容置腔321，該第 一令置腔321用來收容活動裝組 鄆展、卫40。兩兩側壁之相交處形 成一條棱323，從而使得該固定羊 ❹ηπ—知， 朱J2具有四條棱323。該 固疋架32之四條棱323沿固定牟d由、 aU疋朱32中心軸方向向固定架 32之底。p延伸形成四個第一定位單元324，向固定㈣之 頂部延伸形成四個第-定位單元324。該第—定位單元似 =將固定架32與彈片5G定位。本實施例中，該第一定 位單元324為定位柱。 备然’該第-定位單元324亦可為定位孔，該第一定 立170 324之個數亦可為一個、兩個、三個或更多個。 ❹ 可理解，該第一定位單元324亦可單獨成型，再藉由 膠合黏結、螺接等其他固接方法與固定架32固接為一體。 同樣還可理解，該蚊架32亦可沒有m單元似。 該活動裝組40裝設於固定裝組3〇之第一容置腔321 中，且活動裝組40可沿垂直於頂板22之方向移動。該活 動裝組40具有一活動裝筒41及繞於該活動裝筒41外壁之 線圈42。該活動裝筒41為一具有大致呈圓形之第二容置腔 412之立方體結構。該第二容置腔412用來收容鏡筒（圖未 不）。該第二容置腔412之側壁沿平行於活動裝筒41之中 201021374 心軸方向延伸形成八個第一定位柱413。該八個第一定位柱 413中’四個專間隔地分佈於活動裝筒41之頂部且可藉由 貫穿部224穿過外殼22之頂板22,四個等間隔地分佈於活 動裝筒41之底部，該第一定位柱413用來將該活動裝筒 與平板彈片50定位及固定，該第一定位柱413附近還設有 一仃程限制柱414。其中，該行程限制柱414接觸頂板22 以限制該活動裝筒41之移動距離。本實施例中，該行程限 ，柱414與第位柱413相分離，且其沿平行於活動裝 筒41之中心軸方向之長度小於第一定位柱413沿平行於活 動裝筒41之中心軸方向之長度。 優選地，本實施例中，該活動裝筒41之每 , 乃〜, 你他切衣同4丄之母一端之四個 仃程限制柱414等間隔地分佈於活動裝筒41 =然，該行程限制柱414與第一定位柱413亦可相連。 當然，該行程限制柱414沿平行於活動裝筒41之 41Γ中之度亦可大於第—^位柱413沿平行於活動裝筒 部224 向之長度，此時’該頂板22上可不開設貫穿 $ 疋位柱413、订程限制柱 固接Π=、螺接等其他固接方法與活動裝筒41 可=為體。同樣還可理解，該第—定位柱413之個數亦 數亦可為、7、三個或更多個。該行程限触414之個 了為一個、兩個、三個或更多個。 田然’該行程限制柱414還可分佑於、本么 -端之端面之其他位置。 佈於活動裝筒41之每 11 201021374 ' 該彈片50具有一方形板體51。該板體51之幾何中心 ’ 開設有一通孔510,該通孔510使得光線可穿過該板體51。 該板體51設有四個圍繞該通孔510之彈力部53。 該板體51之位於該四個彈力部53與通孔51之間之部 分設有四個與該第一定位柱413相配合使用之第二定位單 元54，以使得彈片50與活動裝筒41定位並固接為一體。 本實施例中，該第二定位單元54為開口方向朝向通孔510 且與通孔510連通之凹口，且第二定位單元54藉由點膠方 ❹法與第一定位柱413膠合。 當然，該第二定位單元亦可為與該通孔510不連通之 通孔。 當然，該第一定位柱413亦可為具有蘑菇頭之定位柱， 此時則可省去點膠過程，亦可將彈片50與活動裝筒41定 位並固接為一體。 該板體51之位於該四個彈力部53與通孔51之間之部 @分還設有四個與該活動裝筒41之行程限制柱414相配合使 用之行程限制單元55。該行程限制單元55貫穿板體51， 以使該行程限制柱414藉由行程限制單元55穿過板體51 與外殼22之頂板222相接觸以限制該活動裝筒41之行程。 本實施例中，該行程限制單元55為與通孔510不連通之通 孔，當然，該行程限制單元55亦可為開口方向朝向通孔510 且與該通孔510連通之凹口。 該板體51之位於該四個彈力部53之外側、且遠離通 孔510之部分開設有四個與第一定位單元324配合使用之 12 201021374 - 第二定位孔56。該第二定位孔56與第一定位單元324相配 ， 合將彈片50與固定架32定位並固定。為了防止與固定架 32固定不牢，可於該第二定位孔56與第一定位單元324 之間點膠，亦可將該板體51之位於該四個彈力部53之外 侧之部分藉由膠合黏結之方法與固定架32之底部及頂部之 棱固接。 可理解，該音圈馬達10亦可只有一靠近頂板22之彈 片50。 ® 當然，該兩個彈片50之彈力部53之形狀可不同。 當然，該彈片50亦可具有與外部電路相連之導接端子。 該承載體60呈方形，與外殼20構成一隔離盒70。該 隔離盒70可用於消除外部電磁對該音圈馬達10之干擾並 防止該音圈馬達10之電磁影響其外部電子元件之工作。 該承載體60具有一與該活動裝筒41之第一定位柱413 相接觸之中央設有通孔之表面601。該承載體60還具有四 ❹個與固定架32之第一定位單元324相配合使用第三定位單 元602，以將該承載體60與該固定架32固接為一體。本實 施例中，該第三定位單元602為定位凹槽。當然，該第三 定位單元602亦可為定位孔或定位柱。 當然，若該通孔222較大，亦可沒有貫穿部224，只要 該頂板22不會阻礙第一定位柱413之移動，又可限制行程 限制柱414之行程即可。 請參閱圖4,其為發明第二實施例所提供之音圈馬達 (圖未示）之固定裝組30a，其與固定裝組30之區別在於： 13 201021374 該固定裝組30a具有一固定裝筒32a及四塊裝設於固定裝 筒32a中之方形磁鐵34a，該固定裝筒32a係一呈正方體筒 狀之筒體，具有四個方形侧壁301a，每一侧壁301a均具有 兩個相對之且平行之第一侧壁端面303a及第二侧壁端面 305a，該第一侧壁端面303a向第二側壁端面305a凹陷形成 一方形之第二容置腔307a，該第二容置腔307a用來收容磁 鐵34a，且該第二容置腔307a沒有穿透第二侧壁端面305a。 當然，該第二容置腔307a亦可穿透第二侧壁端面305a。 當然，該磁鐵34a亦可吸附於固定裝筒32a之内壁上。 請參閱圖5,其為本發明第三實施例所提供之音圈馬達 (圖未示）之彈片60a，其與彈片50之區別在於：彈片60a 之板體61為圓形，該板體61具有一通孔610，該板體61 圍繞該通孔610設有兩個彈力部63,該板體61之位於該兩 個彈力部63與該通孔610之間之部分設有兩個等間隔分佈 之第二定位單元64及三個等間隔分佈之行程限制單元 65。當然，此時之音圈馬達之活動裝筒相應之為圓形，且 該活動裝筒之第一定位柱及行程限制柱應分別與該第二定 位單元64及行程限制單元65相配合使用。 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】 201021374 圖1係本發明第一實施例中之音圈馬達之立體示意圖。 圖2係圖1沿II-II線之剖示圖。 圖3係本發明第一實施例之中音圈馬達之分解圖，其 包括固定裝組、活動裝筒及彈片。 圖4係本發明第二實施例中之音圈馬達之分解圖。 圖5係本發明第三實施例中音圈馬達之彈片之示意圖。 【主要元件符號說明】In the conventional voice coil motor, one end of the movable cylinder has four positioning posts, and the four U-pillars cooperate with the positioning holes on the inner connecting portion of the elastic piece to fix the movable charging cylinder and the inner connecting portion of the elastic piece. As one. At the same time, the = column also has a - order limit function 'This stroke limit function enables the assembly of the movable drum of the voice coil motor of the use of 4 to be restricted during contact with the top plate of the outer casing during the movement. . In order to meet people's requirements for the short and light mobile phone, for the action, the g-turn motor should also be reduced in size. However, when the degree of the voice coil motor is reduced, the outer casing must be lowered in height. At this time, when the movable drum of the voice coil motor moves, the positioning post of the movable cylinder quickly contacts the outer casing to make the movable loading cylinder. Line (4) Short 1 reduces the height of the positioning post to be longer. However, this method makes the positioning between the movable barrel and the elastic piece difficult, which makes the assembly process of the voice coil motor difficult. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a voice coil motor that is small in size and easy to assemble. a voice coil motor comprising: a top plate, a movable barrel and a spring piece, the movable barrel being movable in a direction perpendicular to the top plate, the movable barrel having at least an end portion adjacent to the end of the top plate, The elastic piece has a plate body having a through hole at the center of the plate body, and the (4) is provided with a first positioning hole for use with the first positioning 8 201021374: column to make the inner side of the elastic piece and the movable loading tube Positioning, the movable cartridge further has at least one stroke limiting column near the end of the top plate, and the plate body of the elastic piece is provided with a stroke limiting unit for use with the stroke limiting column, so that the stroke limiting column is limited by the stroke The unit passes through the shrapnel and contacts the top plate to limit the moving distance of the movable cartridge. Compared with the prior art, the first positioning column and the stroke limiting column of the movable loading tube provided by the embodiment of the present invention have positioning and row respectively, so that the stroke of the movable loading tube is easily restricted, and the positioning of the elastic piece is directly performed, directly This makes the voice coil motor smaller and easier to assemble. [Embodiment] Referring to Figures i, 2 and 3 in May, it is a voice coil motor 1 according to an embodiment of the present invention. The voice coil motor 10 includes: a housing 2〇, a fixed assembly 30 having two ends open, a movable assembly 40 movably received in the fixed assembly 3, and two of the fixed assembly 3 The elastic piece at both ends and the carrier 60 integrally fixed to the fixed assembly 30. φ The outer casing 20 serves to eliminate the interference of the external electromagnetic force to the voice coil motor 1 and prevent the electromagnetic of the voice coil motor 10 from affecting the operation of its external electronic components. The outer casing 20 can be made of a magnetic mask material such as a nickel-iron alloy, a conductive plastic, a surface conductive material, or a conductive glass. The outer casing 20 has a top plate 22, two first side plates 24 disposed on opposite sides of the top plate 22, and two second side panels 100 disposed on opposite sides of the top plate 22. The top plate 22, the two first side panels 24, and the two second side panels 26 define a receiving space for receiving the fixed assembly. A geometrical center of the top plate 22 defines a through hole 222 for light to pass through the top plate 22. The top plate 22 is provided with four through portions 224. In the embodiment of the present invention, the through portion 224 is a recess in which ρ*ΐ π έΒ & 3 1 faces the through hole 222 and communicates with the through hole 222. Of course, the penetrating portion B 224 may also be a through hole that is not connected to the through hole 222. The fixed assembly 30 has a fixed 32 ^ Λ Μ疋 32 and four magnets 34 mounted in the holder 32. The fixing frame 32 is a frame body of a rectangular body. The four square side walls of the solid tamping strip 32 are fixed to form a first accommodating cavity 321 , and the first accommodating cavity 321 is used for accommodating the movable assembly group, Wei 40. The intersection of the two side walls forms an edge 323, so that the fixed sheep ❹ ππ - know, Zhu J2 has four ribs 323. The four ribs 323 of the solid truss 32 The fixed 牟d is, the central axis of the aU 疋32 is oriented toward the bottom of the fixing frame 32. The p extends to form four first positioning units 324, and extends to the top of the fixed (four) to form four first positioning units 324. The first positioning unit The first positioning unit 324 is a positioning post. In this embodiment, the first positioning unit 324 can also be a positioning hole, and the first positioning unit 170 324 The number can also be one, two, three or more. ❹ It can be understood that the first positioning unit 324 can also be separately formed, and then fixed to the fixing frame 32 by other bonding methods such as gluing, screwing and the like. It is also understood that the mosquito holder 32 may also have no m unit. The activity assembly 40 The movable assembly 40 is mounted in a first accommodating cavity 321 of the fixed assembly 3, and the movable assembly 40 is movable in a direction perpendicular to the top plate 22. The movable assembly 40 has a movable loading tube 41 and the movable loading tube The coil 42 of the outer wall 41. The movable cylinder 41 is a cubic structure having a substantially circular second accommodating cavity 412. The second accommodating cavity 412 is used for accommodating a lens barrel (not shown). The sidewalls of the accommodating cavity 412 extend along the direction of the mandrel parallel to the 201021374 in the movable loading cylinder 41 to form eight first positioning posts 413. The four first positioning posts 413 are distributed at four intervals in the movable loading cylinder 41. The top portion is permeable to the bottom plate 22 of the outer casing 22 through the through portion 224, and is equally spaced at the bottom of the movable loading cylinder 41. The first positioning post 413 is used to position the movable loading cylinder and the flat elastic piece 50. Fixedly, a stroke limiting column 414 is further disposed adjacent to the first positioning post 413. The stroke limiting post 414 contacts the top plate 22 to limit the moving distance of the movable loading cylinder 41. In this embodiment, the stroke limit, the column 414 Separated from the first column 413 and parallel to the central axis of the movable barrel 41 The length of the direction is smaller than the length of the first positioning post 413 in the direction parallel to the central axis of the movable loading cylinder 41. Preferably, in this embodiment, each of the movable loading cylinders 41 is ~, and you cut the clothes with the same The four stroke limiting columns 414 at one end of the female are equally spaced apart from the movable loading cylinder 41. The stroke limiting column 414 can also be connected to the first positioning post 413. Of course, the stroke limiting column 414 is parallel to the movable loading cylinder. The degree of 41之41 may be greater than the length of the first position post 413 parallel to the movable loading portion 224. At this time, the top plate 22 may not be opened through the 疋 position post 413, and the binding limit column is fixed. =, screwing and other fixing methods and the movable cylinder 41 can be = body. It is also understood that the number of the first positioning posts 413 may also be 7, 7, three or more. The stroke limit 414 is one, two, three or more. Tian Ran's stroke limit column 414 can also be divided into other positions on the end face of the end. Each of the movable cylinders 41 is placed on the 11th 201021374'. The elastic piece 50 has a square plate body 51. The geometric center of the plate body 51 defines a through hole 510 through which light can pass. The plate body 51 is provided with four elastic portions 53 surrounding the through hole 510. The portion of the plate body 51 between the four elastic portions 53 and the through hole 51 is provided with four second positioning units 54 for use with the first positioning post 413, so that the elastic piece 50 and the movable loading tube 41 Position and secure together. In this embodiment, the second positioning unit 54 is a notch that faces the through hole 510 and communicates with the through hole 510, and the second positioning unit 54 is glued to the first positioning post 413 by a dispensing method. Of course, the second positioning unit may also be a through hole that does not communicate with the through hole 510. Of course, the first positioning post 413 can also be a positioning post with a mushroom head. In this case, the dispensing process can be omitted, and the elastic piece 50 can be positioned and fixed integrally with the movable loading tube 41. The portion of the plate body 51 between the four elastic portions 53 and the through hole 51 is further provided with four stroke limiting units 55 for use with the stroke restricting post 414 of the movable barrel 41. The stroke limiting unit 55 extends through the plate body 51 such that the stroke limiting post 414 contacts the top plate 222 of the outer casing 22 through the plate 51 through the stroke limiting unit 55 to limit the travel of the movable cylinder 41. In the embodiment, the stroke limiting unit 55 is a through hole that does not communicate with the through hole 510. Of course, the stroke limiting unit 55 may also be a notch whose opening direction faces the through hole 510 and communicates with the through hole 510. The portion of the plate body 51 located on the outer side of the four elastic portions 53 and away from the through hole 510 is provided with four 201021374 - second positioning holes 56 for use with the first positioning unit 324. The second positioning hole 56 is matched with the first positioning unit 324 to position and fix the elastic piece 50 and the fixing frame 32. In order to prevent the fixing of the fixing frame 32, the second positioning hole 56 and the first positioning unit 324 may be glued, or the portion of the plate 51 located on the outer side of the four elastic portions 53 may be used. The method of gluing and bonding is fixed to the bottom and top edges of the holder 32. It will be appreciated that the voice coil motor 10 may also have only a spring 50 adjacent the top plate 22. ® Of course, the shape of the elastic portion 53 of the two elastic pieces 50 may be different. Of course, the elastic piece 50 can also have a conductive terminal connected to an external circuit. The carrier 60 has a square shape and forms a spacer 70 with the outer casing 20. The spacer 70 can be used to eliminate interference from external electromagnetics to the voice coil motor 10 and to prevent the electromagnetics of the voice coil motor 10 from affecting the operation of its external electronic components. The carrier 60 has a surface 601 having a through hole at the center in contact with the first positioning post 413 of the movable cylinder 41. The carrier 60 also has four third positioning units 602 for use with the first positioning unit 324 of the mounting bracket 32 to secure the carrier 60 to the mounting bracket 32. In this embodiment, the third positioning unit 602 is a positioning groove. Of course, the third positioning unit 602 can also be a positioning hole or a positioning post. Of course, if the through hole 222 is large, the through portion 224 may not be provided, as long as the top plate 22 does not hinder the movement of the first positioning post 413, and the stroke of the stroke restricting column 414 can be restricted. Please refer to FIG. 4, which is a fixed assembly 30a of a voice coil motor (not shown) provided by the second embodiment of the present invention, which is different from the fixed assembly 30 in that: 13 201021374 The fixed assembly 30a has a fixed installation. The cylinder 32a and the four square magnets 34a are mounted in the fixed cylinder 32a. The fixed cylinder 32a is a cylinder having a rectangular parallelepiped shape, and has four square side walls 301a, each of which has two side walls 301a. The first sidewall end surface 303a and the second sidewall end surface 305a are opposite to each other, and the first sidewall end surface 303a is recessed toward the second sidewall end surface 305a to form a square second accommodating cavity 307a. The second accommodating cavity The 307a is for receiving the magnet 34a, and the second accommodating cavity 307a does not penetrate the second side wall end surface 305a. Of course, the second accommodating cavity 307a can also penetrate the second sidewall end surface 305a. Of course, the magnet 34a can also be adsorbed on the inner wall of the fixed barrel 32a. Referring to FIG. 5, a shrapnel 60a of a voice coil motor (not shown) according to a third embodiment of the present invention is different from the elastic piece 50 in that the plate 61 of the elastic piece 60a is circular, and the plate 61 is 61. There is a through hole 610. The plate body 61 is provided with two elastic portions 63 around the through hole 610. The portion of the plate body 61 between the two elastic portions 63 and the through hole 610 is provided with two equally spaced portions. The second positioning unit 64 and the three equally spaced stroke limiting units 65. Of course, the movable charging cylinder of the voice coil motor at this time is correspondingly circular, and the first positioning post and the stroke limiting post of the movable loading cylinder should be used together with the second positioning unit 64 and the stroke limiting unit 65, respectively. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application 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 present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a voice coil motor in a first embodiment of the present invention. Figure 2 is a cross-sectional view taken along line II-II of Figure 1. Figure 3 is an exploded view of the voice coil motor of the first embodiment of the present invention, which includes a fixed assembly, a movable assembly, and a spring. Figure 4 is an exploded view of the voice coil motor in the second embodiment of the present invention. Figure 5 is a schematic view showing a shrapnel of a voice coil motor in a third embodiment of the present invention. [Main component symbol description]
音圈馬達 10 外殼 20 固定裝組 30、 30a 活動裝組 40 彈片 50、 60a 頂板 22 第一側板 24 第二側板 26 通孔 222 、510、610 貫穿部 224 固定架 32 磁鐵 34、 34a 第一容置腔 321 棱 323 第一定位單元 324 活動裝筒 41 線圈 42 15 201021374Voice coil motor 10 housing 20 fixed assembly 30, 30a movable assembly 40 spring 50, 60a top plate 22 first side plate 24 second side plate 26 through hole 222, 510, 610 through portion 224 holder 32 magnet 34, 34a first capacity Cavity 321 ridge 323 first positioning unit 324 movable cylinder 41 coil 42 15 201021374
第二容置腔 412 、 307a 第一定位柱 413 行程限制柱 414 板體 51、61 彈力部 53、63 第二定位單元 54、64 行程限制單元 55、65 第二定位孔 56 承載體 60 隔離盒 70 表面 601 第三定位單元 602 固定裝筒 32a 侧壁 301a 第一侧壁端面 303a 第二侧壁端面 305a 16Second accommodating cavity 412, 307a First positioning post 413 Stroke limiting post 414 Plate body 51, 61 Elastic portion 53, 63 Second positioning unit 54, 64 Stroke limiting unit 55, 65 Second positioning hole 56 Carrier 60 Isolation box 70 Surface 601 Third positioning unit 602 Fixed barrel 32a Side wall 301a First side wall end surface 303a Second side wall end surface 305a 16