201024888 .九、發明說明： .【發明所屬之技術領域】 ί發明涉及—種鏡·組，尤其涉及-種防止粉塵及 顆粒落至影像感測器之鏡頭模組。 【先前技術】 常見之音圈馬達主要包括固定架、活動地裝設於該固 定架内之裝筒及至少-彈片。該裳筒用來裝設鏡筒或對隹 鏡片組或變焦鏡片組等元件’該彈片用來保護音圈馬達: ❿於通電之情況下，該音圈馬達驅動裝筒，從而改變鏡 對焦鏡片組或變焦鏡片組與影像感測器之間之距離， 實現對焦或變焦之功能。 組裝鏡頭模組時，將音圈馬達固定於影像感測器上， 然後將鏡筒組裝入裝筒中。由於，鏡筒與裝筒是通過螺紋 之方式配合，並且二者-般係由塑膠材料製成，故，於组 裝過程中螺紋之間之摩擦容易產生粉塵及顆粒，1粉塵 參及顆粒掉落於影像感測ϋ上，將影響成像品質，嚴重 致鏡頭模組失效。 【發明内容】 有鑒於此，提供-種防止粉塵及顆粒落至影像感㈣ 上之鏡頭模組實為必要。 -種鏡頭模組，包括-音圈馬達和—鏡筒，該音圈馬 達包括固定組件、活動組件、彈片和承載座，該活動組件 活動地設置於該固定組件内，該彈片固定於該固定組件並 與該活動組件相連，該固定組件固定該彈片之一端固定於 201024888 該承载座上，該活動組件具有容置腔，該鏡筒收容於該容 置腔，該承載座具有通光孔，該承載座包括與該通光孔同 軸之遮擋環，該遮擋環之最小内徑小於等於該活動組件容 置腔之最小内徑且大於或等於該鏡筒之内徑。 與先前技術相比，本發明實施例中音圈馬達之承載座 上設置遮擋環，鏡筒與活動組件摩擦產生之粉塵及顆粒掉 落至遮擋環上，從而防止粉塵及顆粒掉落於影像感測器上 影響成像品質。201024888. Nine, invention description: . [Technical field to which the invention belongs] The invention relates to a mirror group, and more particularly to a lens module for preventing dust and particles from falling onto an image sensor. [Prior Art] A common voice coil motor mainly includes a fixing frame, a barrel that is movably mounted in the fixing frame, and at least a spring piece. The tube is used to mount a lens barrel or a pair of lens groups or a zoom lens group. The spring is used to protect the voice coil motor: When the power is applied, the voice coil motor drives the barrel to change the mirror focus lens. The distance between the group or the zoom lens group and the image sensor for focusing or zooming. When assembling the lens module, fix the voice coil motor to the image sensor and then load the lens barrel into the barrel. Since the lens barrel and the loading tube are matched by a thread, and the two are generally made of a plastic material, the friction between the threads during the assembly process is likely to generate dust and particles, and the dust is involved in the particles. Falling on the image sensing ϋ will affect the imaging quality and seriously cause the lens module to fail. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a lens module that prevents dust and particles from falling onto the image sense (4). a lens module comprising a voice coil motor and a lens barrel, the voice coil motor comprising a fixing component, a movable component, a spring piece and a carrier, the movable component being movably disposed in the fixing component, the elastic piece being fixed to the fixing The assembly is connected to the movable component, and the fixing component is fixed to the bearing end of the 201024888. The movable component has a receiving cavity, and the lens barrel is received in the receiving cavity, and the carrying hole has a light-passing hole. The carrier includes a shielding ring coaxial with the light-passing hole, the minimum inner diameter of the shielding ring being less than or equal to a minimum inner diameter of the movable component receiving cavity and greater than or equal to an inner diameter of the lens barrel. Compared with the prior art, in the embodiment of the present invention, the cover ring of the voice coil motor is provided with a shielding ring, and the dust and particles generated by the friction between the lens barrel and the movable component are dropped onto the shielding ring, thereby preventing dust and particles from falling into the image sense. The image quality is affected by the detector.
【實施方式】 請參閱圖1及圖2,本發明實施例所提供之鏡頭模組包 括音圈馬達11、鏡筒13和影像感測器12。音圈馬達11用 來驅動鏡筒13以準確成像於影像感測器12上。影像感測 器12包括基板121和設置於基板121上之影像感測單元 122，鏡筒13内容納有鏡片組132，鏡筒13之外表面設置 有外螺紋131。 音圈馬達11包括殼體20、固定組件30、活動組件40、 兩個彈片50及承載座60。 殼體20用於消除外部電磁對該音圈馬達11之幹擾並 防止音圈馬達11之電磁影響其他電子元件之工作。殼體20 具有一個蓋體21和垂直蓋體21之側壁22,該蓋體21及側 壁22限定一個用來容置固定組件30之容置空間。該蓋體 21之幾何中心開設有第一通光孔210,用於光線射入鏡筒 13中。殼體20與承載座60相配合以將固定組件30、活動 組件40及彈片50收容其中。 201024888 ' 固定組件30包括固定架32和設置於固定架32上之磁 -鐵31，固定架32具有一個用來容納活動組件40之第一容 置空間310。 活動組件40具有呈圓形之第二容置腔410，第二容置 腔410用來容納鏡筒13。第二容置腔410之内壁上具有内 螺紋411，内螺紋411與外螺紋131相配合使鏡筒13旋進 第二容置腔410内。 彈片50具有一個中央通孔510,光線通過該中央通孔 ⑩510入射到鏡筒13中。彈片50通過點膠工藝固定於活動組 件40和固定架32上。 承載座60具有與第一通光孔210相當之第二通光孔 610以使光線射入鏡筒13中並成像於影像感測器12上。第 二通光孔610之内壁向内延伸形成圓環形遮擋環620,遮擋 環620與第二通光孔610之中心軸L之間之夾角α小於90 度，且遮擋環620指向活動組件40。 ^ 遮擋環620靠近第二通光孔610中心軸L之表面之間 之最小距離大於或等於鏡片組132之光學部分。 當然，遮擋環620之形狀並不限於本實施例之圓環形， 其可為圓弧形，遮擋環620與第二通光孔610之中心軸L 之間之夾角α可等於90度。 當將鏡筒13旋進活動組件40時，内螺紋411、外螺紋 131之間摩擦產生之粉塵及顆粒落至遮擂環620上而被擂 住，從而可防止粉塵及顆粒掉落於成像單元122上影響成 像品質。 201024888 ， 如圖3所示，本發明第二實施例之承載座70具有通光 孔710，通光孔710之内壁向内延伸形成環形突起720，突 起720與通光孔710同軸。突起720與承載座70限定一個 環形凹槽730。内螺紋411、外螺紋131之間摩擦產生之粉 塵及顆粒落入凹槽730内，從而可防止粉塵及顆粒掉落於 像單元122上影響成像品質。 如圖4所示，本發明第三實施例之承載座80具有通光 孔800，承載座80遠離活動組件40之端面上設置遮檔環 ® 81，遮擋環81之通孔810與通光孔800具有相同之中心軸 M，遮擋環81與承載座80相接觸之表面上設置有環形凹槽 820，内螺紋411、外螺紋131之間摩擦產生之粉塵及顆粒 落入凹槽820内。 當然，凹槽820可包括複數個圓弧形凹槽；遮擋環81 上也可沒有凹槽820。 當然，遮擋環81也可設置於承載座80靠近活動組件 ⑩40之端面上。 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】 圖1係本發明第一實施例鏡頭模組之示意圖，其包括 承載座和活動組件。 201024888 圖2係圖1中承載座和活動組件之配合示意圖。 圖3係本發明第二實施例鏡頭模組中承載座之示意圖。 圖4係本發明第三實施例鏡頭模組中承載座和活動組 件之配合示意圖。 【主要元件符號說明】[Embodiment] Referring to FIG. 1 and FIG. 2, a lens module according to an embodiment of the present invention includes a voice coil motor 11, a lens barrel 13, and an image sensor 12. The voice coil motor 11 is used to drive the lens barrel 13 to be accurately imaged on the image sensor 12. The image sensor 12 includes a substrate 121 and an image sensing unit 122 disposed on the substrate 121. The lens barrel 13 houses a lens group 132. The outer surface of the lens barrel 13 is provided with an external thread 131. The voice coil motor 11 includes a housing 20, a fixing assembly 30, a movable assembly 40, two elastic pieces 50, and a carrier 60. The housing 20 serves to eliminate the interference of external electromagnetics to the voice coil motor 11 and to prevent the electromagnetic of the voice coil motor 11 from affecting the operation of other electronic components. The housing 20 has a cover 21 and a side wall 22 of the vertical cover 21. The cover 21 and the side wall 22 define an accommodation space for receiving the fixing assembly 30. A geometrical center of the cover 21 defines a first light-passing aperture 210 for light to enter the lens barrel 13. The housing 20 cooperates with the carrier 60 to receive the stationary assembly 30, the movable assembly 40 and the resilient member 50 therein. 201024888 'The fixing assembly 30 includes a mounting bracket 32 and a magnet-iron 31 disposed on the mounting bracket 32. The mounting bracket 32 has a first housing space 310 for receiving the movable assembly 40. The movable assembly 40 has a second accommodating cavity 410 in a circular shape, and the second accommodating cavity 410 is for accommodating the lens barrel 13. The inner wall of the second accommodating cavity 410 has an internal thread 411, and the internal thread 411 cooperates with the external thread 131 to screw the lens barrel 13 into the second accommodating cavity 410. The elastic piece 50 has a central through hole 510 through which light is incident into the lens barrel 13. The elastic piece 50 is fixed to the movable member 40 and the holder 32 by a dispensing process. The carrier 60 has a second light passing hole 610 corresponding to the first light passing hole 210 to allow light to enter the lens barrel 13 and be imaged on the image sensor 12. The inner wall of the second light-passing hole 610 extends inwardly to form an annular shielding ring 620. The angle α between the shielding ring 620 and the central axis L of the second light-passing hole 610 is less than 90 degrees, and the shielding ring 620 is directed to the movable component 40. . The minimum distance between the occlusion ring 620 near the surface of the central axis L of the second clear aperture 610 is greater than or equal to the optical portion of the lens set 132. Of course, the shape of the shielding ring 620 is not limited to the circular shape of the embodiment, and may be a circular arc shape. The angle α between the shielding ring 620 and the central axis L of the second light passing hole 610 may be equal to 90 degrees. When the lens barrel 13 is screwed into the movable assembly 40, the dust and particles generated by the friction between the internal thread 411 and the external thread 131 fall onto the concealer ring 620 and are caught, thereby preventing dust and particles from falling onto the imaging unit. 122 affects imaging quality. As shown in FIG. 3, the carrier 70 of the second embodiment of the present invention has a light-passing hole 710. The inner wall of the light-passing hole 710 extends inwardly to form an annular protrusion 720, and the protrusion 720 is coaxial with the light-passing hole 710. The projection 720 and the carrier 70 define an annular groove 730. The dust and particles generated by the friction between the internal thread 411 and the external thread 131 fall into the groove 730, thereby preventing dust and particles from falling on the image unit 122 to affect the image quality. As shown in FIG. 4, the carrier 80 of the third embodiment of the present invention has a light-passing hole 800. The end of the carrier 80 away from the movable component 40 is provided with a shutter ring 81, and the through hole 810 and the light-passing hole of the shielding ring 81 are provided. The 800 has the same central axis M. The surface of the shielding ring 81 contacting the carrier 80 is provided with an annular groove 820. The dust and particles generated by the friction between the internal thread 411 and the external thread 131 fall into the groove 820. Of course, the groove 820 may include a plurality of circular arc-shaped grooves; the damper ring 81 may also have no groove 820. Of course, the occlusion ring 81 can also be disposed on the end surface of the carrier 80 adjacent to the movable assembly 1040. 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 schematic view of a lens module according to a first embodiment of the present invention, which includes a carrier and a movable assembly. 201024888 Figure 2 is a schematic diagram of the cooperation of the carrier and the movable component in Figure 1. 3 is a schematic view of a carrier in a lens module according to a second embodiment of the present invention. Fig. 4 is a schematic view showing the cooperation of the carrier and the movable component in the lens module of the third embodiment of the present invention. [Main component symbol description]
音圈馬達 11 鏡岗 13 影像感測器 12 基板 121 成像單元 122 鏡片組 132 外螺紋 131 殼體 20 固定組件 30 活動組件 40 彈片 50 承載座 60、70 ' 80 蓋體 21 侧壁 22 第一通光孔 210 固定架 32 磁鐵 31 第一容置空間 310 第二容置腔 410 201024888 -内螺紋 411 .中央通孔 510 第二通光孔 610 遮擋環 620 、 81 通光孔 710、800 突起 720 凹槽 730 、 820 通孔 810 ❿ 參 10Voice coil motor 11 mirror 13 image sensor 12 substrate 121 imaging unit 122 lens group 132 external thread 131 housing 20 fixing assembly 30 movable assembly 40 spring 50 carrier 60, 70 '80 cover 21 side wall 22 first pass Light hole 210 fixing frame 32 magnet 31 first accommodating space 310 second accommodating cavity 410 201024888 - internal thread 411. central through hole 510 second light passing hole 610 occlusion ring 620, 81 light passing hole 710, 800 protrusion 720 groove 730, 820 through hole 810 ❿ gin 10