200839340 九、發明說明： 【發明所屬之技術領域】 - 本發明是有關於一種鏡頭模組，特別是指一種可防止 粉塵產生的小型化鏡頭模組。 【先前技術】 參閱圖1 ’為現有一種鏡頭模組，包括一基座91、一 鏡筒92、一沿一軸線L設置於該鏡筒92内之鏡片單元93 f°又置於該基座91之電路板94、一與該電路板94電連 接，且與該鏡片單元93相對應之影像感測器95，及一設置 於该鏡片單元93與影像感測器95間之濾光片96。 4基座91包括一圍繞該軸線L之内周面9丨丨，及一設 置於。玄内周面911之内螺紋912。該鏡筒92包括一與該内 周面911同軸设置之外周面921，及一設置於該外周面 ，且與該内螺紋912螺合之外螺紋922。 _田鏡頭杈組組裝完成後，必須進行調焦動作，即轉動 、 “鏡筒92使"亥鏡片單元93沿該軸線L方向趨近或遠離該 &像感測裔95以達到調焦之目的。當轉動該鏡筒92時， 由於違基座91之内螺紋912與該鏡筒％之外螺紋922 口齒 t處會因摩擦而產生粉塵，且粉塵會掉至該濾光片96上而 造成白晝面不良。另外，雖然有些鏡頭模組是直接將該濾 光片％直接蒸鍍在該鏡片單元93之一鏡片，但是調焦時 所產生之粉塵會直接掉至該影像感測器％上，同樣也會產 生白晝面不良之問題。 【發明内容】 5 200839340 因此，本發明之目的即在提供一種可防止粉塵掉落至 濾、光片或影像感測器上，且可避免白晝面不良之可防止粉 塵產生的小型化鏡頭模組。 乃 於疋，本發明可防止粉塵產生的小型化鏡頭模組包含 一基座、一鏡片單元，及一鏡片壓蓋。 該基座包括一圍繞一軸線且界定出一鏡室之内周面、 -與該内周面相背設置之外周面，及一形成於該外周面之 外螺紋。 該鏡片單元是設置於該鏡室。 該鏡片壓蓋包括一頂抵於該鏡片單元之頂抵段，及一 由該頂抵段延伸之螺合段，其中，該螺合段具有一與該外 螺紋螺合之内螺紋。 藉此’當轉動該鏡片壓蓋時，由於該外螺紋與内螺紋 是嚙合於該基座外，因此摩擦所產生之粉塵不會掉至該鏡 室’可解決白晝面不良之問題。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。 參閱圖2、3，本發明可防止粉塵產生的小型化鏡頭模 組之較佳實施例包含一基座1、一鏡片單元2、一鏡片壓蓋 3、一彈性體4、二遮光片5、一電路板6、一影像感測器7 6 200839340 ，及一濾光片8。 该基座1包括一圍繞一軸線L1且界定出一鏡室u之 内周面12、一與該内周面12相背設置之外周面13、一形 成於該外周面13之外螺紋14、一由該内周面12沿一徑向 延伸之凸緣15，及一連接該内周面12與外周面13，且靠 近該鏡片壓蓋3之第一端面16,沿該軸線L1方向，該第一 、面16與鏡片壓蓋3間具有一間隙h。該鏡片單元2是設 置於該鏡室11，並包括複數沿該軸線L1相間隔排列之鏡片 21 〇 談鏡片壓蓋3包括一頂抵於該鏡片單元2之頂抵段31 ，及一由該頂抵段31延伸之嫘合段32，其中，該螺合段 32具有一與該基座i之外螺紋14螺合之内螺紋321。 該彈性體4是夾設於該鏡片單元2及凸緣15間，並恆 使4鏡片單元2與頂抵段31相頂抵，該彈性體4可為一彈 黃、一泡棉，或一橡膠環，在本實施例中，該彈性體4為 一橡膠環。沿該徑向，該彈性體4之—内環面41至該轴線 L1之距離，大於該凸緣15之一内環面151至該軸線u之 距離。 遠等遮光片5是間隔設置於該鏡片單元2之鏡片21間 〇 該電路板6是設置於該基座i，而該影像感測器7是與 該電路板6電連接，且用以接收來自該鏡片單元2之光線 〇 該濾、光片8是固設於該鏡室u，且沿該軸線L1方向與 200839340 該鏡片單元2之鏡片21相間隔排列。值得說明的是，該濾 光片8也可以是以蒸鍍的方式替代，直接蒸鍍在該鏡片單 元2其中一鏡片21之表面而形成濾光層，同樣可達到濾光 之目的。 當鏡頭模組整體組裝完成後，由於光線通過該鏡片單 元2之鏡片21所產生之一焦點f是形成於該濾光片8與影 像感測器7間，而不是形成於談影像感測器7之一感測面 71上，因此必須進行調焦之動作。進行調焦時，轉動該鏡 片壓蓋3,使該鏡片壓蓋3之頂抵段31壓迫該鏡片單元2 之鏡片21沿該軸線L1方向趨近該感測面71，並壓縮該彈 性體4產生一變形量，同時，由於該鏡片壓蓋3是沿該軸 線L1方向往該感測面71螺進，因此，該第一端面16與該 鏡片壓蓋3之間距h會因而變小，且該間距h之減少量會 與該彈性體4之變形量相等。當該鏡片壓蓋3螺進至該焦 點f形成於該感測面71時，即完成調焦之動作。 相反地，當該焦點f是形成於該影像感測器7之感測面 71之相反端時，僅需反向操作上述動作即可達到調焦之目 的’且在該鏡片壓蓋3沿該軸線L1方向遠離該感測面71 螺退時，該彈性It 4亦會產生一沿該車由、線u方向之變形量 ，迫使該鏡片單it 2之鏡片21恒頂抵於該鏡片壓蓋3之頂 抵段31，同時，該間距h之增加量會與該彈性體4之變形 量相等。 因《亥基座1之外螺紋14盘兮倍H 掌2 ^ ^興忒鏡片壓盍3之内螺紋32i 是嚙合於該基座1外，钕推> % # # _ ^ 故進仃调焦時，該等螺紋14、321 200839340 摩擦所產生之粉塵是直接掉至該基座1外而非該鏡室u， 即不會有粉塵掉至該濾光片8或是該影像感測器7之感測 面71上可解決白晝面不良之問題。另外，由於該彈性體 4是夾設於該鏡片單元2之鏡片21與該凸緣15間，因此該 鏡片21與基座1之内周面12於調焦時萬一因摩擦而產生 之粉塵亦可被有效隔離，而不掉至該濾光片8或是該影像 感測器7之感測面71上。 值付δ兒明的是，在一變化例中，該鏡片壓蓋3更可包 括一由該螺合段32延伸之點膠段，使該鏡片壓蓋3在調焦 完成後，可用一黏膠黏合於該點膠段與該基座1之外周面 13上而固定該鏡片壓蓋3。 在另一變化例中，該鏡片壓蓋3是藉由複數間隔形成 於該頂抵段31之凸柱與該鏡片單元2之鏡片21相頂抵， 如此，若5亥等凸柱未能同時頂抵該鏡片2丨而造成調焦時對 該鏡片21施力不均，此時僅需對該等凸柱稍加修整即可解 決上述問題。 又，右该等鏡片21、遮光片5，或該凸緣15略具彈性 ，亦可以取消該彈性體4之設置。 —歸納上述，本發明因該基座1之外螺紋14與該鏡片壓 1 3之内螺紋321是鳴合於該基座丨外，因此可有效避免 T焦時摩擦所產生之粉塵掉至該濾光片8或是該影像感測 & 7之感測面71上’可解決因粉塵所造成之白畫面不良之 問題，故確實能達到發明之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 200839340 能以此限定本發明實施之範圍，即大凡依本發明中請專利 範圍及發明說明内容所作之簡單的等效變化與修飾^仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是習知鏡頭模組之一剖面示意圖； #圖2是一剖面圖，說明本發明之一較佳實施例之鏡頭 模組構造，及一焦點於調焦前之情形；及 圖3是一剖面圖，說明該焦點於調焦後之情形。 10 200839340200839340 IX. Description of the Invention: [Technical Field of the Invention] - The present invention relates to a lens module, and more particularly to a miniaturized lens module capable of preventing dust generation. [Prior Art] Referring to FIG. 1 ' is a lens module of the prior art, comprising a base 91, a lens barrel 92, and a lens unit 93 disposed in the lens barrel 92 along an axis L. a circuit board 94 electrically connected to the circuit board 94, an image sensor 95 corresponding to the lens unit 93, and a filter 96 disposed between the lens unit 93 and the image sensor 95 . The base 91 includes an inner peripheral surface 9A surrounding the axis L, and is disposed. Thread 912 inside the inner peripheral surface 911. The lens barrel 92 includes a peripheral surface 921 disposed coaxially with the inner circumferential surface 911, and a thread 922 disposed on the outer circumferential surface and screwed into the internal thread 912. After the assembly of the _ lens lens assembly is completed, the focusing operation must be performed, that is, the rotation, "the lens barrel 92 causes the quoting lens unit 93 to approach or away from the axis L direction in the direction of the axis L to achieve focusing. For the purpose of rotating the lens barrel 92, dust is generated due to friction due to the internal thread 912 of the base 91 and the lens barrel 902, and dust is dropped onto the filter 96. In addition, although some lens modules directly deposit the filter % directly on one lens of the lens unit 93, the dust generated during focusing will fall directly to the image sensor. On the other hand, the problem of white chalk surface defects is also generated. [Invention] 5 200839340 Therefore, the object of the present invention is to provide a method for preventing dust from falling onto a filter, a light sheet or an image sensor, and avoiding chalkiness. The miniaturized lens module capable of preventing dust generation is provided. The miniaturized lens module for preventing dust generation of the present invention comprises a base, a lens unit, and a lens gland. Around an axis and Defining an inner circumferential surface of a mirror chamber, - providing an outer circumferential surface opposite to the inner circumferential surface, and a thread formed outside the outer circumferential surface. The lens unit is disposed in the mirror chamber. The lens gland includes a top Abutting against the top portion of the lens unit and a screwing portion extending from the top abutting portion, wherein the screwing portion has an internal thread that is screwed to the external thread. thereby rotating the lens cover When the external thread and the internal thread are meshed outside the base, the dust generated by the friction does not fall into the mirror chamber. The problem of the white surface defect can be solved. [Embodiment] The foregoing and other aspects of the present invention The technical content, features, and effects will be apparent from the following detailed description of a preferred embodiment of the drawings. Before the present invention is described in detail, it is noted that in the following description Like components are denoted by the same reference numerals. Referring to Figures 2 and 3, a preferred embodiment of the miniaturized lens module for preventing dust generation of the present invention comprises a base 1, a lens unit 2, and a lens cover 3 Elastic 4, two light shielding sheets 5, a circuit board 6, an image sensor 7 6 200839340, and a filter 8. The base 1 includes an inner peripheral surface 12 surrounding an axis L1 and defining a mirror chamber u. An outer peripheral surface 13 is disposed opposite to the inner peripheral surface 12, a thread 14 formed on the outer peripheral surface 13 and a flange 15 extending from the inner peripheral surface 12 in a radial direction, and a connection therebetween The peripheral surface 12 and the outer peripheral surface 13 are adjacent to the first end surface 16 of the lens cover 3, and along the axis L1, the first surface 16 and the lens cover 3 have a gap h. The lens unit 2 is disposed. The lens chamber 11 includes a plurality of lenses 21 spaced along the axis L1. The lens cover 3 includes a top abutting portion 31 that abuts against the lens unit 2, and a top portion 31 extends therefrom. The twisting section 32, wherein the screwing section 32 has an internal thread 321 screwed to the external thread 14 of the base i. The elastic body 4 is sandwiched between the lens unit 2 and the flange 15, and the four lens units 2 are abutted against the top abutting portion 31. The elastic body 4 can be a yellow, a foam, or a In the present embodiment, the rubber body 4 is a rubber ring. Along the radial direction, the distance from the inner annular surface 41 of the elastomer 4 to the axis L1 is greater than the distance from the inner annular surface 151 of the flange 15 to the axis u. The remote visor 5 is disposed between the lenses 21 of the lens unit 2, the circuit board 6 is disposed on the pedestal i, and the image sensor 7 is electrically connected to the circuit board 6 for receiving The light from the lens unit 2, the filter, and the light sheet 8 are fixed to the mirror chamber u, and are arranged at intervals along the axis L1 with the lens 21 of the lens unit 2 of 200839340. It should be noted that the filter 8 can also be replaced by evaporation, and directly deposited on the surface of one of the lenses 21 of the lens unit 2 to form a filter layer, which can also achieve the purpose of filtering. After the lens module is assembled as a whole, a focus f generated by the light passing through the lens 21 of the lens unit 2 is formed between the filter 8 and the image sensor 7, instead of being formed in the image sensor. 7 is on one of the sensing faces 71, so the focus adjustment operation must be performed. When performing focusing, the lens cover 3 is rotated such that the top abutting portion 31 of the lens cover 3 presses the lens 21 of the lens unit 2 toward the sensing surface 71 in the direction of the axis L1, and compresses the elastic body 4 A deformation amount is generated, and at the same time, since the lens cover 3 is screwed toward the sensing surface 71 along the axis L1, the distance h between the first end surface 16 and the lens cover 3 is reduced, and The amount of decrease in the pitch h is equal to the amount of deformation of the elastic body 4. When the lens cover 3 is screwed until the focal point f is formed on the sensing surface 71, the focusing operation is completed. Conversely, when the focus f is formed at the opposite end of the sensing surface 71 of the image sensor 7, only the reverse operation is required to achieve the purpose of focusing, and the lens cover 3 is along the edge When the axis L1 is away from the sensing surface 71, the elastic It 4 also generates a deformation amount along the direction of the vehicle and the line u, forcing the lens 21 of the lens unit 2 to be fixed against the lens cover. The top of the third portion abuts the segment 31, and at the same time, the amount of increase of the pitch h is equal to the amount of deformation of the elastic body 4. Because the "Hui base 1 thread 14 disk 兮 H H 2 ^ ^ 忒 忒 lens pressure 盍 3 internal thread 32i is engaged outside the pedestal 1, 钕 push > % # # _ ^ During the coke, the dust generated by the friction of the threads 14,321 200839340 falls directly to the outside of the base 1 instead of the mirror chamber u, that is, no dust falls to the filter 8 or the image sensor The sensing surface 71 of 7 can solve the problem of poor white surface. In addition, since the elastic body 4 is interposed between the lens 21 of the lens unit 2 and the flange 15, the inner surface 12 of the lens 1 and the inner peripheral surface 12 of the base 1 are dusted by friction in the case of focusing. It can also be effectively isolated without falling onto the filter 8 or the sensing surface 71 of the image sensor 7. The value of the lens cover 3 is that, in a variant, the lens cover 3 can further comprise a dispensing section extending from the screwing section 32, so that the lens cover 3 can be glued after the focus adjustment is completed. The lens cover 3 is fixed by being glued to the dispensing section and the outer peripheral surface 13 of the base 1. In another variation, the lens cap 3 is abutted against the lens 21 of the lens unit 2 by a plurality of protrusions formed on the top abutting section 31, so that if the 5th and the other columns are not simultaneously When the lens is pressed against the lens 2 to cause uneven focusing on the lens 21, the above problem can be solved only by slightly trimming the protrusions. Moreover, the right lens 21, the light shielding sheet 5, or the flange 15 is slightly elastic, and the arrangement of the elastic body 4 can also be eliminated. - In summary, in the present invention, since the external thread 14 of the base 1 and the internal thread 321 of the lens pressure 13 are external to the base, the dust generated by the friction during the T-focus can be effectively prevented from falling to the The filter 8 or the sensing surface 71 of the image sensing & 7 can solve the problem of white picture defects caused by dust, so it can indeed achieve the purpose of the invention. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention can be limited by the fact that it is not limited to 200839340, that is, the simple equivalent change of the patent scope and the description of the invention in the present invention. And modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a conventional lens module; FIG. 2 is a cross-sectional view showing the lens module structure of a preferred embodiment of the present invention, and a focus on the focus before focusing The situation; and Figure 3 is a cross-sectional view illustrating the situation after the focus is adjusted. 10 200839340
【主要元件符號說明】 1 …··· •…基座 32···， 11 ••… …·鏡室 321 · 12…·· —内周面 4 •… 13 "… —外周面 41… 14····· •…外螺紋 5 ···· 15·.··· …·凸緣 6 ···· m… •…内環面 7 ···· 16····· •…第一端面 71… …·族μ 留> Q ____ z ...... 鏡月早兀 〇 ____底 U f..... z丄..... 鏡片 1 ο ...... ....Μ /3Ϊ' ^ U ____ Π 31 ••… •…頂抵段 L1… •螺合段 •内螺紋 •彈性體 •内環面 •遮光片 •電路板 •影像感測器 •感測面 •滤·光片 •焦點 •間距 •轴線 11[Description of main component symbols] 1 ...··· •...Base 32···, 11 ••...·Mirror chamber 321 · 12...·· — Inner peripheral surface 4 •... 13 "... —Outer surface 41... 14····· •...External thread 5 ···· 15·······Flange 6 ···· m... •...Inner ring surface 7···· 16·····•... The first end face 71...the family μ stays> Q ____ z ...... 镜月早兀〇____ bottom U f..... z丄..... Lens 1 ο ... .....Μ /3Ϊ' ^ U ____ Π 31 ••... •...Abutting section L1... • Threading section • Female thread • Elastomer • Inner ring surface • Shading • Circuit board • Image sensing • Sensing surface • Filter • Light film • Focus • Spacing • Axis 11