200837414 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結構，特別是指一種生產時 可防止溢膠的小型化鏡頭。 【先前技術】 參閱圖1、圖2 ’為現有一種裝設於一照相手機（圖未 示）内的鏡頭1，該鏡頭1具有一鏡筒11，及一鏡片單元 12 〇 該鏡筒Π具有一圍繞一轴線L的周壁111、一容室112 、一第一開孔113、一第二開孔114,及一呈階級狀的内周 面115。该鏡片早元12是設置於該容室112内，且由該第 一開孔113至該第二開孔114依序分別是一第一、第二、第 三、第四鏡片121、122、123、124，該等鏡片121、122、 12 3、124彼此互相抵靠’而該鏡片早元12是藉由^ —黏膠 13黏合固定於該鏡筒η内。 。且 就小型化鏡頭而言，由於上述鏡頭1本身體積已較小 ’因此該鏡片單元12的一光學有效徑φ相對較小，使該照 相手機内的一感光元件（圖未示）接收的光線較少而具有 較低拍攝品質。由於設計該鏡片單元12時，在該光學有效 徑Φ與該鏡筒11内周面115之間需預留供點膠的一預設寬 度D，於此情況下，若欲增加該光學有效徑φ，唯有增加該 鏡頭1的直徑才能達成，如此將使該鏡頭1的體積增加； 反之，若欲使該鏡頭1小型化，則只能犧牲該光學有效徑 Φ ’無法兼顧該鏡頭1小型化與較大的光學有效徑φ 5 200837414 ，在點膠過程中，通常是將該黏膠13環繞黏合於該第一鏡 片121與該内周面115,但經常發生該黏膠13溢出而沾污 到該第一鏡片121的光學有效徑Φ内，造成該鏡頭1影像 不良而降低生產良率。 【發明内容】 因此，本發明之一目的，即在提供一種於生產時可防 止溢膠之小型化鏡頭。 本發明之又一目的，即在提供一種更加小型化之鏡頭 〇 本發明之再一目的，即在提供一種不加大鏡筒外徑卻 能增加光學有效徑的小型化鏡頭。 於是，本發明小型化鏡頭是包含一鏡筒及一第一鏡片 ，該鏡筒具有一圍繞一光軸而界定出一鏡室的内壁面，及 一沿該光軸連通該鏡室的開放孔，該第一鏡片是沿該光轴 設置於該鏡室内，並具有一面向該開放孔的第一環面、一 與該第一環面相背設置的第二環面，及一介於該第一、第 二環面之間且面向該内壁面的圍繞部，該圍繞部具有至少 一由該第一環面朝該第二環面凹陷形成的圍面，該圍面與 該内壁面共同灰疋出一點膠槽，藉此，可減少生產時溢膠 情形的發生、使鏡頭更加小型化或加大光學有效徑。 【實施方式】 有關本發明之刖述及其他技術内容、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。 6 200837414 如圖3、4、5所示，分別是本發明小型化鏡頭之一仰 視不意圖、圖3中4一4割面線的剖視示意圖，及一第一鏡 片3的一立體圖。本發明小型化鏡頭之較佳實施例是可裝 没於具有照相功能的手機（圖未示）上。該鏡頭包含一鏡 筒2、該第一鏡片3、一間隔環4、一第二鏡片5、一第三 鏡片6，及一黏膠7。 該鏡筒2具有一呈階級狀的内壁面21、一由該内壁面 • 21圍繞一光軸L1界定出的鏡室22、一沿該光轴L1連通該 鏡室22的開放孔23，及一連通該鏡室22且與該開放孔23 相反設置的入光孔24。 該第一鏡片3是沿該光軸Li設置於該鏡室22内，並 具有一面向該開放孔23的第一環面31、一與該第一環面 31相背設置且面向該間隔環4的第二環面32，及，介於該 第一、第二環面31、32之間且面向該内壁面21的圍繞部 33。該圍繞部33具有一外周面331、三由該第一環面31朝 鲁該第二環面32凹陷形成的圍面332,及一環繞該光軸^的 ‘ 導流槽333。該等圍面332是等間隔彼此左右相鄰，.且該等 圍面332與該内壁面21界定出等間隔且彼此左右相鄰的三 個點膠槽334，該導流槽333是由該外周面331徑向凹陷且 連通該等點膠槽334。 該間隔環.4、該第二鏡片5、該第三鏡片6均是沿該光 輛L1設置於該鏡室22内，該間隔環4是鄰近該第一鏡片3 的第二環面32,該第二鏡片6是鄰近該入光孔24,而該第 —鏡片5是位於該第二鏡片6與該間隔環$之間。 7 200837414 本發明進行組裝時，將該第三鏡片6沿該光轴[I裝入 該鏡室22内鄰近並對應該入光孔24。接著，依序將該第二 鏡片5、該間隔環4沿該光軸L1裝入該鏡室22内，再將該 弟鏡片3 該光轴L1裝入該鏡室22，使該第二環面32 抵止該間隔環4，該第一環面31朝向該開放孔23，且該外 巧面331朝向該鏡筒2的内壁面21。此時，該等圍面332 與該内壁面21界定出該等點膠槽334，而該導流槽333的 一開口 335被該内壁面21封閉。 作業人員將該黏膠7分別滴入該等點膠槽334内，使 該黏膠7黏合該等圍面332與該内壁面21，同時，·位於該 等點膠槽334内尚未硬化的黏膠7因毛細現象被導流進入 該導流槽333内，使該導流槽333内也具有該黏膠7 (見圖 6) °由於該黏膠7黏合於該鏡筒2與該第一鏡片3之間， 待該黏膠7硬化，該第一鏡片3與該鏡筒2即可穩固地結 合。本實施例中是採用點UV膠的方法將該第一鏡片3與該 鏡筒2進行黏合，再施予uv光照射使UV膠硬化而固定。 經由以上的說明，可再將本發明的優點歸納如下： 一、 本發明的該小型化鏡頭，該黏膠7是接觸該第一 鏡片3的圍面332，而非接觸與光學有效徑φΐ同側的第一 環面31 ’因此，可大幅減少溢膠於該光學有效徑φ 1内的 情形發生。 二、 由於每一點膠槽334是被該圍面332與該内壁面 21界定出，所以，將該黏膠7直接滴入該等點膠槽334内 即可固定該第一鏡片3。如圖2、4所示，相較於習知技術 8 200837414 ’本發明不需要預留該預設寬度D以提供點膠平台，因此 ，本發明的該第一鏡片3之光學有效徑Φ1與該内壁面21 的距離S可以更小，所以可採用比習知鏡筒u外徑更小的 鏡筒2，而使鏡頭更加小型化，或是維持本發明該鏡筒2的 外徑與習知鏡筒11相當，但可具有更大的光學有效徑 而達到更好的光學特性。 值得說明的是，本發明可有以下的設計變化： 一、 雖上述實施例中，該等圍面332的數量為3，於實 際運用時，該圍面332的數量可以是i (圖未示），意即該 圍面332由該第一環面31整圈朝該第二環面32凹陷而呈 環狀，此時，該圍面332與該内壁面21所界定出的該點膠 槽334是呈環狀地整圈圍繞該光軸u，於此狀況下，該導 流槽3 3 3可被省略。 二、 雖上述實施例中，該導流槽333的數量為丨且圍 繞該光軸L1而連通該等點膠槽334，實際運用時，該導流 槽333的數夏可為3 (圖未示），意即雖然每一導流槽333 連通每一點膠槽334,但是該等導流槽333之間彼此不連通 ΰ 三、 雖上述實施例中，該等圍面332是由該第一環面 31平行該光軸L1朝該第二環面32凹陷，使該第一鏡片3 更具有三槽底面336 ’而每一點膠槽334實際上是由該圍面 332、該槽底φ 336與該内壁φ 21包圍界定然而，該等 圍面332也可由該第-環面3'不平行該光轴L1朝該第二 環面32㈣（圖未示），使該等圍面332實質上是-朝該 9 200837414 内壁面21外斜的斜面，而每一圍面332也將與該内壁面21 界疋出該點膠槽334，於此狀況下，將不會有該槽底面336 〇 四、雖上述實施例中，該導流槽333是用來增加該第 一鏡片3與該鏡筒2的膠合面積，然而於膠合強度要求較 低的狀況下，該導流槽333可以被省略（圖未示）。 歸納上述’本發明之小型化鏡頭，該等點膠槽334是 由該鏡筒2的内壁面21與該第一鏡片3的圍繞部33共同 界定出，並藉由將該黏膠7滴入該等點膠槽334内而同時 接觸該内壁面21與該圍面332，而毛細現象可將該黏膠7 導流至該導流槽333，藉此避免溢膠的情形發生，並使該光 學有效徑Φ1與該内壁面21的距離S可以更小，且增加該 黏膠7的貼覆面積，進而使鏡頭更加小型化，或是加大該 光學有效徑Φ1，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 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修,，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是現有一種裝設於一照相手機的鏡頭之一立體示 意圖； 圖2是現有該鏡頭的一側面剖視圖，說明供一黏膠黏 合的一預設寬度使該鏡頭的一光學有效徑無法加大； 圖3是本發明小型化鏡頭一較佳實施例的一仰視示意 10 200837414200837414 IX. Description of the Invention: [Technical Field] The present invention relates to a lens structure, and more particularly to a miniaturized lens which can prevent overflow of glue during production. [Prior Art] Referring to Figures 1 and 2, there is shown a lens 1 mounted in a camera phone (not shown) having a lens barrel 11 and a lens unit 12 having a lens barrel A peripheral wall 111 surrounding an axis L, a chamber 112, a first opening 113, a second opening 114, and a stepped inner peripheral surface 115. The lens element 12 is disposed in the chamber 112, and the first opening, the second opening, and the second opening 114 are sequentially a first, second, third, and fourth lenses 121, 122, respectively. 123, 124, the lenses 121, 122, 12 3, 124 abut each other' and the lens element 12 is adhesively fixed in the barrel n by the adhesive 13. . In the case of a miniaturized lens, since the lens 1 itself has a small volume, the optical effective diameter φ of the lens unit 12 is relatively small, so that a light receiving element (not shown) in the camera phone receives light. Less and lower shooting quality. When the lens unit 12 is designed, a predetermined width D for dispensing is reserved between the optical effective diameter Φ and the inner circumferential surface 115 of the lens barrel 11. In this case, if the optical effective diameter is to be increased. φ, only the diameter of the lens 1 can be increased, so that the volume of the lens 1 is increased; on the contrary, if the lens 1 is to be miniaturized, the optical effective diameter Φ can only be sacrificed. And the larger optical effective diameter φ 5 200837414, in the dispensing process, the adhesive 13 is usually wrapped around the first lens 121 and the inner circumferential surface 115, but the adhesive 13 often overflows. Stained into the optical effective diameter Φ of the first lens 121, causing poor image quality of the lens 1 and reducing production yield. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a miniaturized lens that can prevent spillage during production. Still another object of the present invention is to provide a lens which is more compact. A further object of the present invention is to provide a miniaturized lens which can increase the optical effective diameter without increasing the outer diameter of the lens barrel. Therefore, the miniaturized lens of the present invention comprises a lens barrel and a first lens, the lens barrel has an inner wall surface defining a mirror chamber around an optical axis, and an open hole communicating with the mirror chamber along the optical axis. The first lens is disposed in the mirror chamber along the optical axis, and has a first annular surface facing the open hole, a second annular surface disposed opposite the first annular surface, and a first interval a surrounding portion between the second toroids facing the inner wall surface, the surrounding portion having at least one surrounding surface formed by the first annular surface recessed toward the second annular surface, the surrounding surface and the inner wall surface being together A little glue groove can be used, thereby reducing the occurrence of overflow during production, making the lens more compact or increasing the optical effective diameter. The detailed description of the preferred embodiments of the present invention will be apparent from the following detailed description of the preferred embodiments. 6 200837414 As shown in Figs. 3, 4, and 5, respectively, a schematic cross-sectional view of one of the miniaturized lenses of the present invention, a 4-to-4 cut line in Fig. 3, and a perspective view of a first lens 3 are shown. The preferred embodiment of the miniaturized lens of the present invention is mountable on a mobile phone (not shown) having a camera function. The lens comprises a lens barrel 2, the first lens 3, a spacer ring 4, a second lens 5, a third lens 6, and an adhesive 7. The lens barrel 2 has a stepped inner wall surface 21, a mirror chamber 22 defined by the inner wall surface 21 around an optical axis L1, and an open hole 23 communicating with the mirror chamber 22 along the optical axis L1, and A light entrance hole 24 that communicates with the mirror chamber 22 and is opposite to the opening hole 23. The first lens 3 is disposed in the mirror chamber 22 along the optical axis Li, and has a first annular surface 31 facing the opening hole 23, a back surface opposite to the first annular surface 31, and facing the spacer ring A second annular surface 32 of the fourth surface, and a surrounding portion 33 between the first and second annular surfaces 31, 32 and facing the inner wall surface 21. The surrounding portion 33 has an outer peripheral surface 331, a surrounding surface 332 formed by the first annular surface 31 recessed toward the second annular surface 32, and a 'guide groove 333 surrounding the optical axis. The weirs 332 are adjacent to each other at equal intervals, and the weirs 332 and the inner wall surface 21 define three dispensing grooves 334 that are equally spaced from each other and are adjacent to each other, and the guiding grooves 333 are The outer peripheral surface 331 is radially recessed and communicates with the dispensing grooves 334. The spacer ring 4. The second lens 5 and the third lens 6 are disposed in the mirror chamber 22 along the light L1. The spacer ring 4 is adjacent to the second ring surface 32 of the first lens 3. The second lens 6 is adjacent to the light entrance hole 24, and the first lens 5 is located between the second lens 6 and the spacer ring $. 7 200837414 When the present invention is assembled, the third lens 6 is placed in the mirror chamber 22 along the optical axis [I] and is adjacent to the light entrance hole 24. Then, the second lens 5 and the spacer ring 4 are sequentially loaded into the mirror chamber 22 along the optical axis L1, and the optical axis L1 of the young lens 3 is loaded into the mirror chamber 22 to make the second ring. The surface 32 abuts the spacer ring 4, the first annular surface 31 faces the opening hole 23, and the outer surface 331 faces the inner wall surface 21 of the lens barrel 2. At this time, the surrounding surfaces 332 and the inner wall surface 21 define the dispensing grooves 334, and an opening 335 of the guiding grooves 333 is closed by the inner wall surface 21. The adhesive member 7 drops the adhesive 7 into the dispensing tanks 334, respectively, so that the adhesive 7 adheres the surrounding surfaces 332 and the inner wall surface 21, and at the same time, the adhesive which is not hardened in the dispensing tanks 334 The glue 7 is diverted into the guide groove 333 due to the capillary phenomenon, so that the glue 7 also has the adhesive 7 (see FIG. 6). Since the adhesive 7 is adhered to the lens barrel 2 and the first Between the lenses 3, the adhesive 7 is hardened, and the first lens 3 and the lens barrel 2 can be firmly combined. In the present embodiment, the first lens 3 is bonded to the lens barrel 2 by means of a point UV glue, and then UV light is applied to harden and fix the UV glue. Through the above description, the advantages of the present invention can be further summarized as follows: 1. The miniaturized lens of the present invention, the adhesive 7 is a peripheral surface 332 contacting the first lens 3, and the non-contact is optically effective. The first toroidal surface 31' on the side can thus greatly reduce the occurrence of overflow of glue within the optical effective diameter φ1. 2. Since each of the glue grooves 334 is defined by the surrounding surface 332 and the inner wall surface 21, the first lens 3 can be fixed by directly dropping the adhesive 7 into the dispensing grooves 334. As shown in FIG. 2 and FIG. 4, compared with the prior art 8 200837414, the present invention does not need to reserve the preset width D to provide a dispensing platform. Therefore, the optical effective diameter Φ1 of the first lens 3 of the present invention is The distance S of the inner wall surface 21 can be made smaller, so that the lens barrel 2 having a smaller outer diameter than the conventional lens barrel u can be used to make the lens more compact, or to maintain the outer diameter and the outer diameter of the lens barrel 2 of the present invention. The lens barrel 11 is comparable, but can have a larger optical effective diameter for better optical properties. It should be noted that the present invention may have the following design changes: 1. Although the number of the surrounding surfaces 332 is 3 in the above embodiment, the number of the surrounding surfaces 332 may be i in actual use (not shown) That is, the surrounding surface 332 is annularly recessed by the first annular surface 31 toward the second annular surface 32. At this time, the surrounding surface 332 and the inner wall surface 21 define the dispensing groove. 334 is a ring around the optical axis u in a ring shape, and in this case, the flow channel 3 3 3 can be omitted. 2. In the above embodiment, the number of the flow guiding grooves 333 is 丨 and the plastic dispensing grooves 334 are connected around the optical axis L1. In actual operation, the number of the guiding grooves 333 may be 3 (Fig. That is, although each of the flow guiding grooves 333 communicates with each of the dispensing grooves 334, the guiding grooves 333 are not connected to each other. Third, although in the above embodiment, the surrounding surfaces 332 are A ring surface 31 is parallel to the optical axis L1 and recessed toward the second ring surface 32, so that the first lens 3 further has a three-slot bottom surface 336', and each dispensing groove 334 is actually formed by the surrounding surface 332. Φ 336 is surrounded by the inner wall φ 21 . However, the surrounding surfaces 332 may also be non-parallel to the optical axis L1 by the first toroidal surface 3 ′ toward the second toroidal surface 32 ( 4 ) (not shown), such that the surrounding surfaces 332 In essence, the inclined surface of the inner wall surface 21 of the 9 200837414 is inclined, and each of the surrounding surfaces 332 will also be separated from the inner wall surface 21 by the dispensing groove 334. In this case, the bottom surface of the groove will not be present. 336. In the above embodiment, the guide groove 333 is used to increase the bonding area of the first lens 3 and the lens barrel 2, but the bonding strength is low. Under conditions, the guide groove 333 may be omitted (not shown). In the above-mentioned miniaturized lens of the present invention, the dispensing grooves 334 are defined by the inner wall surface 21 of the lens barrel 2 and the surrounding portion 33 of the first lens 3, and are dropped by the adhesive 7 The inner wall surface 21 and the outer surface 332 are simultaneously contacted in the dispensing grooves 334, and the capillary phenomenon can guide the adhesive 7 to the guiding groove 333, thereby preventing the overflowing of the glue and causing the The distance S between the optical effective diameter Φ1 and the inner wall surface 21 can be smaller, and the bonding area of the adhesive 7 is increased, thereby further miniaturizing the lens or increasing the optical effective diameter Φ1, so that the invention can be achieved. purpose. However, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the invention and the description of the invention. All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a conventional lens mounted on a camera phone; FIG. 2 is a side cross-sectional view of the prior art lens, illustrating a predetermined width for bonding an adhesive to the lens. An optical effective path cannot be increased; FIG. 3 is a bottom view of a preferred embodiment of the miniaturized lens of the present invention 10 200837414
圖， 圖4是圖3中4— 4割面線的剖視示意圖； 圖5是該較佳實施例的一第一鏡片的一立體圖；及 圖6是圖4的一局部放大視圖，說明該較佳實施例的 一導流槽的一開口被一鏡筒的一内壁面封閉。 11 200837414 【主要元件符號說明】 2 .···· •…·鏡阕 333… •…導流槽 21 ·… •…·内壁面 334… •…點膠槽 22♦… …"鏡t 335… .…開口 23*… …··開放孔 336… …·槽底面 24·… •…·入光孔 4…… •…間隔環 Ί ..... •…·楚一底 Μ C 弟一窥片 J 弟一^鏡月 31…· ••…弟一環面 6······ •…第三鏡片 32···· •…·第二環面 7…… •…黏膠 33·… ••…圍繞部 L1"… •…光軸 331 ·· •…·外周面 Φ卜· ···*光學有效徑 332 ·· •…·圍面 S…… •…距離 參 12Figure 4 is a cross-sectional view of the 4 - 4 cut line of Figure 3; Figure 5 is a perspective view of a first lens of the preferred embodiment; and Figure 6 is a partial enlarged view of Figure 4 An opening of a flow guiding groove of the preferred embodiment is closed by an inner wall surface of a lens barrel. 11 200837414 [Description of main component symbols] 2 .········································································· ..... opening 23*... ...··opening hole 336... ...·slot bottom surface 24·... •...·into the light hole 4... •...interval ring Ί ..... •...·楚一底Μ C 弟一Peeping J brother one ^ mirror month 31...·••... brother a ring face 6······...the third lens 32···· •...the second torus 7...•...viscose 33· ... ••...around the part L1"... •...optical axis 331 ·· •...·outer surface Φ ····* optical effective path 332 ·· •...·envelope S... •...distance from 12