201041278 . 六、發明說明： ^【發明所屬之技術領域】 本發明涉及·一種音圈馬達組件。 【先前技術】 音圈馬達組件（Voice Coil Motor，VCM)適合作為電 子產品（如數碼相機、手機、數碼攝像機等）中之短距 驅動裝置。（請參見 Design of a voice coil motor used in the focusing system of a digital video camera，Magnetics, 〇 IEEE Transactions on Volume 41, Issue 10, Oct. 2005 Page(s):3979 - 3981 )。 常見之音圈馬達組件主要包括一固定架及一可活動 地裝設於該固定架内之裝筒及至少一彈片。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 來保護音圈馬達組件。現有之音圈馬達組件之裝筒在裝 設鏡頭模組之鏡筒之過程中，需將鏡筒相對裝筒旋轉。 〇 然而，普通之音圈馬達組件之可靠性低，在組裝過程中 往往由於扭力過大導致音圈馬達組件中之零元件損壞而 使整個音圈馬達組件失效。 【發明内容】 有鑑於此，有必要提供一種抗扭力大、可靠性高之 之音圈馬達組件。 一種音圈馬達組件，其用於與鏡頭模組配合進行調 4 201041278 焦。該音圈馬達組件包括 之 件運動且收容於所述固定元件:：;動：::對固定組 =述固定組件包括一固定架及裝=== =接:述:=包括多條棱桂及連接該多= =收數::桿共， 筒及繞於該裝筒外壁之線 70件包括一裝 正對机詈斛u 線 永久磁鐵與所述線圈 Ο 又置所述彈片固設於所述固定組件之固定架上。 ==條棱柱中至少有二條棱柱靠近所述第 ίΜ且件之土上》収置有—第—導向件。所述可 動、件之㈣之頂部與底部對應所述第-㈣件位置分 :設置有至少二個與所述第-導向件相匹配之第二導向 =所述第-導向件與第二導向件之間在沿可動元= =方向上相互卡制，且可沿所述可動組件之軸向相對 #練先前技術’本發明之音圈馬達組件之可動元 〇件與固定疋件之間在沿可動元件之轴向方向上相互卡 制’且可沿所述可動組件之軸向相對滑動。因此，在將 鏡頭模組裝旋人可動元件之過程中，因為可動元件盘固 定元件藉由所述第-導向件與第二導向件之配合而相互 卡制’所卩，即使旋轉扭力過大也不會造成所述彈片结 構變形或斷裂以致音圈馬達組件失效，提高了組裝良率。 【實施方式】 下面將結合附圖與實施例對本技術方案之音圈馬達 5 201041278 組件作進一步詳細說明。 Ο201041278 . VI. Description of the invention: ^ [Technical field to which the invention pertains] The present invention relates to a voice coil motor assembly. [Prior Art] The Voice Coil Motor (VCM) is suitable as a short-range drive 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 video camera, Magnetics, 〇 IEEE Transactions on Volume 41, Issue 10, Oct. 2005 Page(s): 3979-3981). A common voice coil motor assembly mainly includes a mounting bracket and a cartridge movably mounted in the mounting bracket 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 that protects the voice coil motor assembly. In the assembly of the existing voice coil motor assembly, the lens barrel needs to be rotated relative to the barrel during the installation of the lens barrel of the lens module. 〇 However, the conventional voice coil motor assembly has low reliability, and the entire voice coil motor assembly is often ineffective during assembly due to excessive torque caused by excessive torque in the voice coil motor assembly. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a voice coil motor assembly that is high in torsion resistance and high in reliability. A voice coil motor assembly for coordinating with a lens module 4 201041278 coke. The voice coil motor assembly includes a member that moves and is received in the fixing component:: moving::: pairing the fixed group=said fixing component includes a fixing frame and mounting ====: said: = including a plurality of ribs And connecting the plurality of ==receipt:: total of rods, the cylinder and the wire around the outer wall of the cylinder 70 include a pair of front-mounted 詈斛u-line permanent magnets and the coil Ο and the shrapnel is fixed on The fixing assembly is fixed on the frame. == At least two prisms in the prism are located close to the Μ Μ and the soil on the piece ” ” ” ”. The top portion and the bottom portion of the movable member (4) correspond to the position of the fourth-fourth member: at least two second guides matching the first guide member are disposed = the first guide member and the second guide member The pieces are clamped to each other in the direction of the movable element ==, and can be moved along the axial direction of the movable assembly between the movable element and the fixed element of the voice coil motor assembly of the present invention. They are mutually engaged in the axial direction of the movable member and are slidable relative to each other in the axial direction of the movable assembly. Therefore, in the process of assembling the lens mold to the human movable member, since the movable member disk fixing member is engaged with each other by the cooperation of the first guide member and the second guide member, even if the rotational torque is excessively large, The shrapnel structure is not deformed or broken so that the voice coil motor assembly fails, and the assembly yield is improved. [Embodiment] The voice coil motor 5 201041278 component of the present technical solution will be further described in detail below with reference to the accompanying drawings and embodiments. Ο
立請一併參閱圖工與圖2’本發明實施方式所提供之 曰圈=達組件⑽’該音圈馬達組件雇用於與鏡頭模 、、且j圖未示）配合進行調焦。該音圈馬達組件1〇〇包括; 外成20、固定疋件3()、—可相對固定組件％運動之可 動元件40、第一彈片5〇a、第二彈片遍及承載體卯。 所述可動組件4G可滑動地安裝在所述固定組件3〇内。 所述第-彈片5Ga、第二彈片通分別設置於固定元件 3〇之頂面與底面。所述外殼2〇與所述承載體60共同構 成-隔離盒65,所述固定元件3〇、可動元件4〇、第一 彈片50a及第二彈片5〇b均收容於所述隔離盒内。 該外殼20用於消除外部電磁對該音圈馬達組件 之干擾並防止該音圈馬達組件1〇〇之電磁影響其外部電 子元件之工作。該外殼2〇可藉由鎳鐵合金、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2〇 具有一頂板22、兩個垂直設置於頂板22相對兩側之第 一側板24及兩個垂直設置於頂板22之另外相對兩側且 與所述第一板24相連接之第二側板26。該頂板以、兩 個第一側板24及兩個第二側板26形成一用來容置所述 固定元件30之容置空間（圖未標）。該頂板22之幾何中 心開設-圓形之第一開口 222，用於使光線射入鏡頭模 組中。其中一第一侧板24上開設有兩個端子接槽25a及 25b。 請一併參閱圖3至圖5,該固定元件3〇包括一固定 6 201041278 Ο Ο 架32及四塊纽於固^架32中之永久磁鐵34。該固定 架32#、-呈正方體筒狀之架體，其包括四條㈣隔且相 ^平灯之棱桎323及複數連接所述四條棱柱323之連接 才干327。、该固定架32之四個棱柱323及複數連接桿^7 八同圍成帛一谷置腔321，該第一容置腔321用於收 容可動組件40。所述固定架32之每一側之棱柱323及 連接桿327構成有_置磁部322，用來容置所述永久磁 ::4。所述固定架32之每一棱柱之相對兩端沿所 二棱柱3U之長度方向分別延伸出兩個第一定位柱 —斤述第疋位柱324用來將固定架32與第一彈片 ^位該四條棱柱M3中任意一棱柱背離所述 弟一谷置腔321之一伯丨丨胡却·古 πη _ 、 惻開3又有一凹槽325。所述四條棱 #近所述第-容置腔321之内側壁上分別沿垂直 中方向開設有一第-導向件挪。本實施方式 中所述弟一導向件326為一導向槽。 可以理解之係，該第一定位柱 =膠合，螺接等其他固接方法與固定架二 it所述四條棱柱323也可係其中兩對角位置上之 广分別開設一第—導向件326，或係其中任 於本實施方式。 #導向件326,亚不限 321中斤述^動疋件4〇裝設於固定板件30之第一容置腔 外壁之後團了4^凡件4〇具有一農冑41及繞於該裝筒41 方式中’所述裝筒41頂部與底 7 201041278 - 部對應所述固定元件30之第一導向件326位置分別設置 有第二導向件415。本實施方式中，所述第二導向件415 為一與所述導向槽相匹配之凸起。所述第二導向件415 與固定架32上之第一導向件326之間在沿可動元件40 之軸向方向上相互卡制，且可沿所述可動組件40之轴向 相對滑動。所述線圈42與所述永久磁鐵34正對設置。 該裝筒41具有一大致呈圓形之第二容置腔412。該第二 容置腔412用來收容鏡頭模組。該第二容置腔412之侧 0 壁沿平行於裝筒41之軸方向延伸形成複數第二定位柱 413。該複數第二定位柱413均勻分佈於裝筒41上，用 來與所述第一彈片50a、第二彈片50b定位。在每一第 二定位柱413之附近開設有兩個點膠凹槽414，該點膠 凹槽414可注入膠，從而使得該裝筒41與所述第一彈片 50a、第二彈片50b膠合。該線圈42之兩端頭可分別與 其鄰近之第一彈片50a、第二彈片50b相連。 可以理解，該第二定位柱413也可單獨成型，再藉 ® 由膠合粘結、螺接等其他固接方法與裝筒41固接為一 體。 所述第一彈片50a、第二彈片50b之幾何中心均開 設有一第二開口 510。所述第二開口 510周緣對應所述 裝筒41上之複數第二定位柱413位置均勻地開設有複數 缺口 501。該第二開口 510用於使光線射入或射出鏡頭 模組。該第一彈片50a具有四個均勻分佈之第一定位孔 504a及一第一導接端子502a。該第二彈片50b具有四個 8 201041278 • 均勻分佈之第二定位孔504b及一第二導接端子502b。 ^ 所述第一定位孔504a、第二定位孔504b與所述第一定 位柱324相匹配。該第一導接端子502a與該第二導接端 子502b與外部電路相連，使得電流依次第一導接端子 502a、第一彈片50、線圈42之一端頭、線圈42之另一 端頭、第二彈片50b之第二導接端子502b，從而形成閉 合回路。該第一、第二導接端子502a與502b之結構相 似，均呈L形，但第一導接端子502a較長，第二導接端 0 子502b較短。該第一導接端子502a之一端容置於凹槽 325中，另一端容置於所述承載體60中。該第二導接端 子502b之一端也容置於承載體60中。 可以理解，該第一導接端子502a與第一彈片50可 單獨成型，再藉由膠合粘結、螺接或其他固接方法與該 第一彈片50固接為一體，也可與該第一彈片50 —體成 型。本實施方式中，該第一導接端子502a與第一彈片 50 —體成型。 0 將第一、第二導接端子502a與502b與外部電路連 通，使線圈42内有電流流動，而通有電流之線圈42在 四個永久磁鐵34形成之磁場中受到力之作用，從而帶動 可動組件40沿其軸向移動。 可以理解之係，該音圈馬達組件100也可以不設第 一、第二導接端子502a與502b，而係將線圈42與外部 電路直接相連，不限於本實施方式，只要該線圈42内有 電流流動即可。 201041278 • 可以理解之係，該第一定位柱324也可以為兩個、 ^ 三個或更複數，不限於本實施方式，只要與第一定位孔 504a、第二定位孔504b相配合將第一彈片50a、第二彈 片50b與固定架32定位並固定即可；同時，所述裝筒 41之第二定位柱413之個數也可以為兩個、三個或更複 數，不限於本實施方式，只要與所述第一缺口 501相配 合將第一彈片50a、第二彈片50b與所述裝筒41定位並 固定即可，並不限於本實施方式。 〇 組裝時，先將所述可動元件40之第二導向件415 可活動地收容於該固定元件30之第一導向件326内；再 將所述第一彈片50a及該第二彈片50b藉由所述第一定 位孔504a、第二定位孔504b與第一定位柱324之配合 分別固定於該固定元件30之上，同時，所述裝筒41之 第二定位柱413與所述第一定位孔504a、第二定位孔 504b之第一缺口 501相配合將第一彈片50a、第二彈片 50b與所述裝筒41定位並固定。該固定元件30被收容 ❹ 於該外殼20内並固定於該承載體60,其中，該第一導 接端子502a與該第二導接端子502b穿過該承載體60並 分別藉由端子接槽25a、25b與外部電路連接。 使用時，給所述線圈42通電，使得線圈42與永久 磁鐵34之間產生洛倫茲力（Lorentz force )，推動所述可 動組件40相對所述固定組件30做軸向上下運動。 請一併參閱圖6至圖7,為本發明第二實施方式之 音圈馬達組件200。所述音圈馬達組件200之結構與第 201041278 一實施方式之音圈馬軌件_之結構大難同，不同 之處在於：所述固定組#70之四條棱柱爪上沿盆 方向分別延伸有-第-導向件，本實方式中，所述第一 導向件為一凸起726 ;所述可動組件80上之裝筒81之 頂部與底部之四角位置分別延伸有— 伸件82上分別開設有與所述凸起726相匹配之第二導向 件’本實施方式中’所述第二導向件為導向口 821。Referring to the drawings and Fig. 2', the embodiment of the present invention provides a loop assembly (10). The voice coil motor assembly is employed in conjunction with a lens mold and is not shown. The voice coil motor assembly 1 includes an outer casing 20, a fixed jaw 3 (), a movable member 40 movable relative to the fixed assembly, a first elastic piece 5a, and a second elastic piece extending over the carrier body. The movable assembly 4G is slidably mounted within the fixing assembly 3A. The first elastic piece 5Ga and the second elastic piece pass are respectively disposed on the top surface and the bottom surface of the fixing member 3〇. The housing 2 and the carrier 60 together form a spacer 65, and the fixing member 3, the movable member 4, the first elastic piece 50a and the second elastic piece 5〇b are housed in the isolation box. The housing 20 is used to eliminate external electromagnetic interference with the voice coil motor assembly and to prevent the electromagnetics of the voice coil motor assembly 1 from affecting the operation of its external electronic components. The outer casing 2 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 2 has a top plate 22, two first side plates 24 vertically disposed on opposite sides of the top plate 22, and two second vertically disposed on opposite sides of the top plate 22 and connected to the first plate 24. Side panel 26. The top plate, the two first side plates 24 and the two second side plates 26 form a receiving space (not shown) for receiving the fixing member 30. The geometric center of the top plate 22 defines a circular first opening 222 for directing light into the lens module. One of the first side plates 24 is provided with two terminal slots 25a and 25b. Referring to FIG. 3 to FIG. 5 together, the fixing member 3 includes a fixing 6 201041278 Ο frame 32 and four permanent magnets 34 in the fixing frame 32. The holder 32#, a frame body having a rectangular parallelepiped shape, includes four (four) partitions and a flat lamp ridge 323 and a plurality of connection bars 327 connecting the four prisms 323. The four prisms 323 and the plurality of connecting rods (7) of the fixing frame 32 are surrounded by a cavity 321 for receiving the movable component 40. The prism 323 and the connecting rod 327 on each side of the holder 32 are formed with a magnetic portion 322 for accommodating the permanent magnetic ::4. The opposite ends of each prism of the fixing frame 32 respectively extend two first positioning posts along the length direction of the two prisms 3U - the first clamping post 324 is used to fix the fixing frame 32 and the first elastic piece Any one of the four prisms M3 faces away from the one of the ridges 321 of the ridge, but has a groove 325. The four side edges of the first accommodating cavity 321 are respectively opened with a first guide member in a vertical direction. In the embodiment, the guide member 326 is a guide groove. It can be understood that the first positioning post=gluing, screwing and other fixing methods and the four prisms 323 of the fixing frame can also be provided with a first guiding member 326 at two diagonal positions. Or any of them in this embodiment. #导件件326, sub-inclusive 321 jin said that the moving piece 4〇 is installed on the outer wall of the first accommodating cavity of the fixed plate member 30, and then has a farmer's 41 and wraps around In the manner of the loading cylinder 41, the top of the loading cylinder 41 and the bottom 7 201041278 - the first guiding member 326 corresponding to the fixing member 30 are respectively provided with a second guiding member 415. In this embodiment, the second guiding member 415 is a protrusion that matches the guiding groove. The second guiding member 415 and the first guiding member 326 on the fixing frame 32 are mutually engaged in the axial direction of the movable member 40, and are slidable relative to each other in the axial direction of the movable assembly 40. The coil 42 is disposed opposite the permanent magnet 34. The cartridge 41 has a second circular receiving cavity 412. The second accommodating cavity 412 is configured to receive the lens module. The side wall 0 of the second accommodating cavity 412 extends in a direction parallel to the axial direction of the loading cylinder 41 to form a plurality of second positioning posts 413. The plurality of second positioning posts 413 are evenly distributed on the loading cylinder 41 for positioning with the first elastic piece 50a and the second elastic piece 50b. Two dispensing grooves 414 are formed in the vicinity of each of the second positioning posts 413. The dispensing grooves 414 can be injected with glue, so that the loading cylinder 41 is glued to the first elastic piece 50a and the second elastic piece 50b. The two ends of the coil 42 are respectively connected to the first elastic piece 50a and the second elastic piece 50b adjacent thereto. It can be understood that the second positioning post 413 can also be separately formed, and then fixed to the cartridge 41 by other bonding methods such as gluing, screwing or the like. A second opening 510 is defined in the geometric center of the first elastic piece 50a and the second elastic piece 50b. A plurality of notches 501 are uniformly disposed at a position corresponding to the plurality of second positioning posts 413 on the loading cylinder 41 at a periphery of the second opening 510. The second opening 510 is for injecting light into or out of the lens module. The first elastic piece 50a has four first positioning holes 504a and a first guiding terminal 502a. The second elastic piece 50b has four 8 201041278 • a second positioning hole 504b and a second guiding terminal 502b which are evenly distributed. The first positioning hole 504a and the second positioning hole 504b are matched with the first positioning post 324. The first conductive terminal 502a and the second conductive terminal 502b are connected to an external circuit such that the current sequentially first the first terminal 502a, the first spring 50, one end of the coil 42, the other end of the coil 42, and the second The second guide of the spring 50b leads to the terminal 502b, thereby forming a closed loop. The first and second lead terminals 502a and 502b are similar in structure, and each has an L shape, but the first lead terminal 502a is long and the second lead terminal 502b is short. One end of the first conductive terminal 502a is received in the recess 325, and the other end is received in the carrier 60. One end of the second guiding terminal 502b is also accommodated in the carrier 60. It can be understood that the first guiding terminal 502a and the first elastic piece 50 can be separately formed, and then fixed to the first elastic piece 50 by glue bonding, screwing or other fixing methods, or can be combined with the first The elastic piece 50 is formed in a body. In the embodiment, the first conductive terminal 502a is integrally formed with the first elastic piece 50. 0, the first and second lead terminals 502a and 502b are connected to an external circuit to cause a current to flow in the coil 42, and the current-carrying coil 42 is subjected to a force in a magnetic field formed by the four permanent magnets 34, thereby driving The movable assembly 40 moves in its axial direction. It can be understood that the voice coil motor assembly 100 may not directly connect the first and second lead terminals 502a and 502b, but directly connect the coil 42 to an external circuit, and is not limited to the embodiment, as long as the coil 42 has The current can flow. 201041278 • It can be understood that the first positioning post 324 can also be two, ^ three or more, not limited to the embodiment, as long as the first positioning hole 504a and the second positioning hole 504b cooperate with the first positioning hole 504b The elastic piece 50a, the second elastic piece 50b and the fixing frame 32 are positioned and fixed. Meanwhile, the number of the second positioning posts 413 of the loading cylinder 41 may also be two, three or more, not limited to the embodiment. The first elastic piece 50a and the second elastic piece 50b and the charging cylinder 41 may be positioned and fixed in cooperation with the first notch 501, and are not limited to the embodiment. The second guiding member 415 of the movable member 40 is movably received in the first guiding member 326 of the fixing member 30; and the first elastic piece 50a and the second elastic piece 50b are further used by The first positioning hole 504a, the second positioning hole 504b and the first positioning post 324 are respectively fixed on the fixing component 30, and at the same time, the second positioning post 413 of the loading cylinder 41 and the first positioning The first notch 501 of the hole 504a and the second positioning hole 504b cooperate to position and fix the first elastic piece 50a and the second elastic piece 50b with the loading cylinder 41. The fixing component 30 is received in the outer casing 20 and fixed to the carrier 60. The first guiding terminal 502a and the second guiding terminal 502b pass through the carrier 60 and are respectively connected by terminals. 25a, 25b are connected to an external circuit. In use, the coil 42 is energized such that a Lorentz force is generated between the coil 42 and the permanent magnet 34 to urge the movable assembly 40 to move axially up and down relative to the fixed assembly 30. 6 to 7, a voice coil motor assembly 200 according to a second embodiment of the present invention. The structure of the voice coil motor assembly 200 is different from the structure of the voice coil horse rail member of the embodiment of the present invention. The difference is that the four prism claws of the fixed group #70 extend along the basin direction respectively - In the embodiment, the first guiding member is a protrusion 726; the four corners of the top and the bottom of the loading barrel 81 of the movable assembly 80 respectively extend - the protruding member 82 is respectively opened The second guide member 'matching the protrusion 726' in the present embodiment is the guide port 821.
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 ，方式’自^能㈣限制本案之申請專職圍。舉凡孰 =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】 圖1係本發明第一實施方式之音圈馬達組件之立儀 ❹ 組裝不意圖； _ 圖2係圖！之音圈馬達組件之立體分解示意圖； 圖3係圖2中音圈馬達組件之固定架之立體示意圖; 圖4係圖2中音圈馬達組件之可動元件之立 圖； 〜 圖5係圖2中音圈馬達組件之較架與可動元件之 立體組裝示意圖； 圖6係本發明第二實施方式之音圈馬達組件之固定 11 201041278 . 元件之部分立體示意圖； . 圖7係圖6之音圈馬達組件之可動元件之部分立體 示意。 【主要元件符號說明】 音圈馬達組件 100 外殼 20 頂板 22 第一侧板 24 端子接槽 25a ' •25b 第二侧板 26 固定元件 30、 70 固定架 32 永久磁鐵 34 第一導向件 326 可動元件 40、 80 裝筒 41、81 線圈 42 第二導向件 415 第一彈片 50a 第二彈片 50b 缺口 501 第一定位孔 504a 第一導接端子 502a 開口 510 承載體 60 隔離盒 65 第一定位柱 324 凹槽 325 置磁部 322 第一容置腔 321 棱柱 323、 723 連接桿 327 第二容置腔 412 第二定位柱 413 點膠凹槽 414 凸起 726 延伸件 82 導向口 821 第一開口 222 12In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application in accordance with the law. However, the above description is only the preferred embodiment of the present invention, and the method of 'self-energy' (four) limits the application for the full-time application. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the present invention are intended to be included in the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a voice coil motor assembly according to a first embodiment of the present invention. 组装 Assembly is not intended; _ Figure 2 is a diagram! 3 is a perspective view of the motor assembly of the voice coil motor assembly; FIG. 3 is a perspective view of the fixed frame of the voice coil motor assembly of FIG. 2; FIG. 4 is a vertical view of the movable component of the voice coil motor assembly of FIG. 2; FIG. 6 is a perspective view of the assembly of the voice coil motor assembly of the second embodiment of the present invention; FIG. 6 is a partial perspective view of the component of the voice coil motor assembly of the second embodiment of the present invention. A portion of the movable element of the motor assembly is shown in perspective. [Main component symbol description] Voice coil motor assembly 100 Housing 20 Top plate 22 First side plate 24 Terminal groove 25a ' • 25b Second side plate 26 Fixing element 30, 70 Fixing frame 32 Permanent magnet 34 First guide 326 Movable component 40, 80 cartridge 41, 81 coil 42 second guide 415 first elastic piece 50a second elastic piece 50b notch 501 first positioning hole 504a first guiding terminal 502a opening 510 carrier 60 isolation box 65 first positioning post 324 concave Slot 325 magnetic portion 322 first accommodating cavity 321 prism 323, 723 connecting rod 327 second accommodating cavity 412 second positioning post 413 dispensing groove 414 protrusion 726 extension member 82 guiding port 821 first opening 222 12