Ι2795?9^^〇 c/006 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’且特別是有關於一種變 鏡頭。 又 L先前技術】Ι2795?9^^〇 c/006 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a lens' and particularly relates to a variable lens. L previous technology]
具有變焦功能之鏡頭一直以來皆為追求攝影品質 消費者所青睞。傳統變焦鏡頭的變焦驅動方式可分貝、 類，一是將變焦鏡頭中的每個運動鏡組都以—個馬5 = 動’一疋採用凸輪一次驅動所有運動鏡組。然而，若要^ 個運動鏡組都以一個馬達驅動，則必然需要 實用。 田The lens with zoom function has always been favored by consumers for the pursuit of photographic quality. The zoom driving method of the conventional zoom lens can be decibel, and the first one is to drive all the moving mirror groups by one cam with each of the moving mirror groups in the zoom lens. However, if a moving mirror group is driven by a motor, it is necessary to be practical. field
圖1為美國專 4974949號所提出之變焦鏡頭的爆 炸圖。請蒼照®卜此專利所提出之變焦鏡頭中，主要θ、 在鏡組10、20與30以及驅動凸輪筒4〇上裝配凸輪銷^ 22、32與42 ’並藉由互相套合之筒狀凸輪％與％的開样 52與57而限制凸輪銷12、22、32與42之移動。如此二 來，當筒狀凸輪50與55做相對旋轉時，凸輪銷12、22、 32, 42將隨著開槽52與57之交會點的變化而移動 !=多:鏡組10、20與30以進行變焦的目的。然而， ^ 頭在體積縮小後存在組裝非常困難的缺點。 音圖。口請^^利第51侧8號所提出之變焦鏡頭的示 ^三個‘二^_之變_中，主要是 、且衣於兩個鏡筒70内，並利用鏡筒7〇之開 1279587伽.加_6 L 6。且的夂轉。此外’鏡組6。還可滑動地裝設 鏡㈣上方則配置;= ^=^^2。另外， 還具有開槽92，輪90各千板凸輪90上 輪90沿A_B方向矛=士限制凸輪銷62之移動。當平板凸 輪銷62之移動，_此"^、各開槽92將驅動位於其中的凸 的。然而，由動於二 需的空:’所以這種變焦‘積不;縮小方向移動所 是二:後變焦鏡頭都存在體舰大或 化且易於組裝將變焦鏡頭微小 為亟待解決的問題。 _短小的設計趨勢，已成 【發明内容】 且容是種變焦鏡頭，其具有體積小 今易、.且衣的k點，適於應用在輕薄短小的電子產品中。 座、=出;=1’其包括-前基座、-後基 一 先予疋件以及一弧形凸輪片。導引件 固=於前基座與後基座n學元件可滑動地配設於導 ^件上，各先學70件之邊緣具有—凸起。弧形凸輪片可移 動地配設於前基座與縣座之間，且具衫料引結構。 ^滑Γ學讀分縣由凸起料5丨結叙配合而沿導 在此變焦鏡頭的-實施例中，前基座具有一第一弧形 槽’後基座具有-第二弧形槽，而弧形凸輪片之前緣與後 12795B7^wfd〇c/〇〇6 緣分別適於沿第-弧形槽與第二弧形槽。 槽 在此變焦鏡頭的一實施例中，前二 而弧形凸輪片之前緣適於沪第；座“有-第-弧形 槽 在此變焦鏡頭的一實動： 而弧形凸輪片之後缘適於沿第二弧二j弟-弧形 在此變焦鏡頭的一實施例中，更包括二=。曰 固定於前基座與後基座之間， ： 於限位桿之間。 ^輪片可滑動地配置 在此變焦鏡頭的一實施例中，弧 大於光學元件之半徑，而弧形凸輪^ ^之:率半徑 重合光學元狀妹。 r曲平行但不 在此變焦鏡頭的一實施例中，更 具有-驅動齒輪。其中，弧形凸輪片之表面上;;1; =輪:動馬達猎由驅動齒輪與齒狀結構之售合而驅:瓜 在此變焦鏡頭的-實施例中，導引件為兩 光學70件可滑動地配設於兩個導桿之間。 干而 在此變焦鏡頭的-實施例中，導引件具有兩 而光學元件可滑動地配設於兩個導執之間。 在此變焦鏡頭的-實施例中，更包括一， ΓίΓί座’且包覆導引件、光學元件叹弧形凸2 片。其中，外忒例如與前基座或後基座一體成形。 ，在此變焦鏡頭的-實施例中，導引結構為導 光學元件之凸起適於在導引結構内滑動。 曰Fig. 1 is an exploded view of a zoom lens proposed by U.S. Patent No. 4,974,949. In the zoom lens proposed by the Japanese Patent Application, the main θ, the lens pins 10, 20 and 30, and the driving cam barrel 4 are equipped with cam pins 22, 32 and 42' and are sleeved by each other. The movement of the cam pins 12, 22, 32 and 42 is limited by the opening of the cams % and % 52 and 57. So, when the cylindrical cams 50 and 55 are relatively rotated, the cam pins 12, 22, 32, 42 will move with the change of the intersection of the slots 52 and 57! = more: the mirror groups 10, 20 and 30 for the purpose of zooming. However, the head has a drawback that assembly is very difficult after the volume is reduced. Sound map. The mouth of the zoom lens proposed by the No. 51 on the 51st side of the mouth is the three 'two ^ _ change _, mainly, and is clothed in the two lens barrels 70, and is opened by the lens barrel 7 1279587 gamma plus _6 L 6. And the twist. Also 'mirror group 6. It can also be slidably mounted on the mirror (4) and configured above; = ^=^^2. In addition, there is also a slot 92 in which the wheel 90 of the wheel 90 is rotated by the cam wheel 62 in the A_B direction. When the plate cam pin 62 is moved, the "", each slot 92 will drive the projection located therein. However, the space required by the two needs: 'So this zoom' does not accumulate; the direction of the reduction is two: the rear zoom lens has a large size and is easy to assemble, and the zoom lens is a minor problem to be solved. _ Short design trend, has become [Explanation] and is a kind of zoom lens, which has a small size, easy to wear, and the k point of clothing, suitable for use in thin and light electronic products. Seat, = out; = 1 'which includes a front base, a rear base, a pre-twisting element, and an arcuate cam piece. The guiding member is fixed on the guiding member on the front base and the rear base n-study element, and each of the 70-piece edges has a protrusion. The curved cam piece is movably disposed between the front base and the county seat, and has a woven material structure. ^The sliding school reading sub-counter is formed by the convex material 5丨 in the embodiment of the zoom lens. The front base has a first curved groove. The rear base has a second curved groove. The edge of the curved cam piece and the edge of the rear 12795B7^wfd〇c/〇〇6 are respectively adapted to be along the first-arc groove and the second arc-shaped groove. In one embodiment of the zoom lens, the front edge of the first two curved cam pieces is adapted to the Shanghai first; the seat has a ---arc groove in a real motion of the zoom lens: and the trailing edge of the curved cam piece In an embodiment of the zoom lens along the second arc, the second embodiment is further included between the front base and the rear base, and between the limit rods. The sheet is slidably disposed in an embodiment of the zoom lens, the arc is larger than the radius of the optical element, and the curved cam is equal to the optical element. The arc is parallel but not an embodiment of the zoom lens Medium, more with - drive gear. Among them, on the surface of the curved cam piece;; 1; = wheel: dynamic motor hunting driven by the sale of the drive gear and the tooth structure: melon in this zoom lens - in the embodiment The guiding member is slidably disposed between the two guiding rods for the two optics 70. In the embodiment of the zoom lens, the guiding member has two guiding members and the optical member is slidably disposed on the two. Between the guides. In the embodiment of the zoom lens, there is further included a ΓίΓί座' and a cladding guide, The element is slanted and curved, and the outer cymbal is integrally formed, for example, with the front base or the rear base. In the embodiment of the zoom lens, the guiding structure is a protrusion of the optical guiding element suitable for guiding Sliding inside the guiding structure.
I2795?$^wfd〇c/006 在此變焦鏡頭的—實施例中， 灰先學兀件之力量是使凸起保持緊抵於導引無A 在此魏鏡躺—實_巾 別連接於光學元件與前基座或後基座之間fit，分 構為導引面，彈f施於光學元件之力 =^结 於導引結構上。 足凸起保持I、抵 綜上崎，本發批變缝射，是额形 =!!結構來驅動光學元件移動以進行變焦。此弧“輪 片不而預祕大的移動空間，且組裝極為容易。換言之厂 ^發明之變焦鏡頭完全可符合電子產品輕薄短小的ς計趨 為讓本發明之上述和其他目的、特徵和優點能更明顯 易k，下文轉較佳實施例，並配合所關式，作詳細說 明如下。 【實施方式】 圖3為本發明一實施例之變焦鏡頭的示意圖，圖4為 圖3之變焦鏡頭移除前基座後的示意圖，圖5為圖3中一 個光學元件的示意圖，而圖6為圖3中弧形凸輪片的示意 圖0 請參照圖3與圖4，本實施例之變焦鏡頭300包括一 前基座310、一後基座320、一導引件33〇、多個光學元件 340以及一弧形凸輪片350。其中，前基座310例如具有一 開口 312，以使外界影像能夠通過開口 312而進入到變焦 12795㈣ doc/006 鏡頭300内部。後基座320同樣可具有一開口（未繪示）， 以使影像在通過變焦鏡頭300内部後可到達後基座320後 方的影像感測元件(未繪示)上。 導弓|忏回疋於前基座310與後基座32〇之間。在 本實施例中，導引件330是由兩根導桿所組成，但本發明 之導引件並不偈限為導桿。各光學元件340是可滑動地配 e又於‘引件330上。具體而言，如圖$所示，本實施例之 光學元件340在其兩端分別具有凸耳342與344。其中， 凸耳342具有開孔342a，凸耳344具有卡口 344a。請參照 圖4與圖5,導引件330中的一根導桿貫穿各光學元件34〇 之凸耳342的開孔342a，而導引件330中的另一根導桿則 卡入各光學元件340之凸耳344的卡口 34如内。藉此，各 光學το件340即可沿導引件33〇滑動。同樣，本發明中光 學元件與導引件的結構與組裝方式並不侷限如上述，只要 光學元件可滑動地配設於導引件上即可。另外，各光=元 ί 緣具有一凸起346。凸起346可-體成形 子X件340上，或是另外組裝於光學元件34〇上。 =照圖3與圖4，弧形凸輪片35()可移動地配設於I2795?$^wfd〇c/006 In the embodiment of the zoom lens, the power of the gray first learning element is to keep the protrusion close to the guide without A. In this case, the Wei mirror lies. The optical element is fitted to the front base or the rear base, and is divided into a guiding surface, and the force applied to the optical element is coupled to the guiding structure. The foot bulge remains I, against the upper saki, the hair is changed into a slit, which is a frontal shape!!! structure to drive the optical element to move for zooming. This arc "the wheel does not pre-emptively move the large space, and the assembly is extremely easy. In other words, the invention's zoom lens can fully meet the light and short electronic products of the electronic product, and the above and other objects, features and advantages of the present invention are made. The following is a detailed description of the preferred embodiment and the following description. [Embodiment] FIG. 3 is a schematic diagram of a zoom lens according to an embodiment of the present invention, and FIG. 4 is a zoom lens of FIG. FIG. 5 is a schematic view of an optical component of FIG. 3, and FIG. 6 is a schematic view of the curved cam blade of FIG. 3. Referring to FIG. 3 and FIG. 4, the zoom lens 300 of the present embodiment is shown. The utility model comprises a front base 310, a rear base 320, a guiding member 33〇, a plurality of optical elements 340 and an arcuate cam piece 350. The front base 310 has an opening 312, for example, to enable external image The opening 312 enters the zoom lens 12795 (4) doc/006 lens 300. The rear base 320 can also have an opening (not shown) to allow the image to reach the rear of the rear base 320 after passing through the zoom lens 300. Measure element a member (not shown). The guide bow is looped between the front base 310 and the rear base 32. In the present embodiment, the guide member 330 is composed of two guide rods, but the present invention The guiding member is not limited to the guiding rod. Each optical element 340 is slidably coupled with the 'lead member 330. Specifically, as shown in FIG. $, the optical element 340 of the embodiment is in two The ends have lugs 342 and 344, respectively, wherein the lugs 342 have openings 342a, and the lugs 344 have bayonet 344a. Referring to Figures 4 and 5, one of the guides 330 extends through the optical elements 34. The opening 342a of the lug 342 of the shank, and the other guiding rod of the guiding member 330 is inserted into the bayonet 34 of the lug 344 of each optical component 340, thereby, the optical τ 340 can be Similarly, the structure and assembly manner of the optical component and the guiding member in the present invention are not limited to the above, as long as the optical component is slidably disposed on the guiding member. The rim has a protrusion 346. The protrusion 346 can be formed on the body X piece 340 or otherwise assembled on the optical element 34. = Figure 3 and Figure 4, curved Wheel sheet 35 () movably disposed in
Iff，與後基座创之間，且具有多個導引結構352。 广’弧形凸輪片35〇相當於—個圓筒的—部份殼 版，其移動時是以其曲率如為料喊轉 =導引結構352為導引槽，而光學元件3 = 則適於沿導引結構352滑動。換言之 ， 以其曲率軸心為轉軸而旋轉時，光學元件導3 12795^^wfd〇c/〇〇6 結構352對凸起346的推移而沿導引件bo滑動。藉此， 弧形凸輪片350可分別驅動各光學元件34〇，以達成光學 變焦的目的。當然，本發明中弧形凸輪之導引結構並不侷 限為導引槽，只要能與光學元件之凸起配合而驅動光學元 件即可。此外，本實施例之弧形凸輪片35〇的曲率半徑例 如是大於光學元件340之半徑，而弧形凸輪片350之曲率 • 軸心例如是平行但不重合光學元件34〇之光軸。 清餐照圖3與圖4，在本實施例之變焦鏡頭3〇〇中， ⑩ 自於弧形凸輪片350移動岐以其曲率軸心為轉軸而旋 轉，因此不需要預留很大的移動空間，而可達成縮小體積 之目的。此外，弧形凸輪片35〇與光學元件34〇間的組裝 方式也遠較習知筒狀凸輪簡單，因此可達成簡化組裝的目 的。另外，弧形凸輪片35〇在縮小後其剛性會大幅提昇， 因，可精確地以預設方式驅動各光學元件340。換言之， 本貝施例之、欠焦鏡頭30Q完全可符合電子產品輕薄短 設計趨勢。 • 凊芩照圖3與圖4，本實施例之後基座320具有一弧 形槽324,而弧形凸輪片35〇之後緣適於卡置在弧形 内並沿藏形槽324滑動。其中，弧形槽324之曲率半徑與 弧形凸輪片350之曲率半徑相同。同時，藉由弧形槽似 可將弧形凸輪片35〇之運動範圍做適當的限制。當然，前 基座mo也可具有對應於弧形槽324之弧形槽，但在此並 可或者，前基座31G與後基座32G兩者任:具有弧 12 7^^^^^doc/006 ”圖7為圖3之變焦鏡頭移除前基座後的前視圖。請泉 照圖二，本實施例之變焦鏡頭·可更包括—驅動馬達 360,，、具有—驅動齒輪362。弧形凸輪片35〇之表面上具 有二齒狀結構354，此#狀結構354可位於弧形凸輪片说 之則緣部分或後緣部分，且可位於弧形凸輪片挪之内表 面或外表面、。換言之，齒狀結構354之位置可依設計需^ 而做更動，並不侷限於上述之位置。驅動馬達36〇是藉由 驅動齒輪362與齒狀結構354之嚅合而驅動弧形凸：片 L5=弧形槽?24移動。此外，在驅動齒輪362與齒狀結 人之間還可配設一至數個傳動齒輪364。當然，弧形 =片350也可採用手動方式移動，並不限定需由驅 達360驅動。 一立圖8為本|明另—實施例之變焦鏡頭移除前基座後的 示〜圖，只轭例與前一實施例之差異在於弧形凸輪片 350的支#方式，故相同構件將以相同標號表示。本實施 ^之變焦鏡頭更包括多個限位桿38G，其固定於前基座(未 矣曰不)與後基座320之間，而弧形凸輪片350則是可滑動地 配置於各限位桿38〇之間。藉由限位桿谓對於弧形凸輪 片的限位，可使弧形凸輪片35〇以其曲率轴心為轉轴 而旋轉。另外，前基座與後基座32()上同樣可選擇性 地搭配弧形槽的設計。 圖f為本發明再一實施例之變焦鏡頭之導引件的示意 回明钱圖3與圖9，在本實施例之導引件9〇〇具有兩 個V執910。此導引件9⑻可取代圖3中導引件的兩 根導桿，而光學元件340的兩個凸耳342與344經適當變 化後可滑動地配設於兩個導執内。由上述可知，本發 明之變焦鏡頭的導引件還可做許多變化設計，只要能讓^ 學元件340適於沿其光軸滑動即可。 圖A10為本發明又一實施例之變焦鏡頭的外殼的示意 圖。請蒼照圖3與圖10，在本發明之變焦鏡頭❸一實施例 中，可更包括一外殼390,其連接前基座31〇與後基座32〇, 且包覆導引件330、光學元件34〇以及弧形凸輪片35〇。藉 由外殼390的設計’可避免外界光線、灰塵與異物接觸内 部的構件。此外’外殼390也可與前基座31G或後基座32〇 一體成形。 園 明更—實_之變线頭的弧形凸輪 片的不意圖’而圖11B為圖11A之弧形凸輪片與光學元件 之配合的剖面示意圖。請參照圖11A與11B，在本實施例 I ’弧形凸輪片1110的導引結構1112是採科引面的形 式。而本實_之變f、鏡社包括至少—料⑽， 接於兩個光學it件113G之間。其中，彈簧施於^ 是使凸起1132保持緊抵於導引結構⑽ 八脰5，本貫施例中兩個導引結構1112之導引面是 互相背對的’而彈簧112〇則是施加拉 1130上，故弧形凸輪片nif)絲艟n±rL+ 口元子凡件 p ^ 時凸起1132將緊抵於導 ^、、°構111上，並隨著導引結構1112而改變兩個光學元 件1130之間的距離以進行變隹。 構1112之導引方面，若兩個導引結 112之¥引面疋互相面對的，則彈簧㈣應施加推力 12 1279587^vvf.doc/006 件⑽上，以使凸起⑽靖抵於導引 片的：咅:A為本發明再-實施例之變焦鏡頭的弧形凸輪 圖’而圖12B為圖12A之弧形凸輪片與光學 ΐ:己i:!::意圖。請參照圖i2A與i2B，在本實施例 二各=3 Γ變焦鏡較包括多個彈簧l22G，其連接 之門。與祕座(讀示）或後基座(未繪示） 起雜，黃122G施於絲元件123G的力量是使凸 起士上保持^抵於導引結構1212上。具體而言，本實施 例中彈黃1220技加拉力於_移林咖上，故弧 形凸輪片」210旋轉時凸起1232將緊抵於導引結構m2 上’亚隨著導引結構1212而移動兩個光學元件mo以進 行變焦。由此可知，本發明之變焦鏡頭中弧形凸輪片的導 引結構還可採用許多變化設計。 、 综上所述，本發明之變焦鏡頭是以弧形凸輪片上的導 引結構來軸光學元件㈣以進行變f、。其巾， 片相當於-個®筒的-部份，其移動時是以其曲率轴心^ 轉軸而旋轉’因此不會如習知平板凸輪需要預留很大的移 動空間’而有利於縮小體積。此外，由於弧形凸輪片不需 如習知筒狀凸輪般以套合方式進行組裝，也不需在光學元 件與筒狀凸輪套合後再將凸輪銷鎖附於光學元件上，因此 即使微型化後組裝仍極為容易。換言之，本發明之變焦鏡 頭完全可符合電子產品輕薄短小的設計趨勢，更可應用於 13 127958^^^〇^/〇〇6 手機等可攜式電子產品且極具市場競爭力。 雖然本發明已以較佳實施例揭露如上，然其並非用以 限疋本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍内，當可作些許之更動與潤飾，因此本發明之^護 範圍當視後附之申請專利範圍所界定者為準。 叹 【圖式簡單說明】 圖1為美國專利第4974949號所提出之變焦鏡頭的晨 炸圖。 、+ 立圖2為美國專利第514〇偏號所提出之變焦鏡頭的示 思、圖。 圖3為本發明一實施例之變焦鏡頭的示意圖。 圖4為圖3之變焦鏡頭移除前基座後的示意圖。 圖5為圖3巾-個光學元件的示意圖。 圖6為圖3中弧形凸輪片的示意圖。 =7為圖3之讀鏡頭移除前基座後的前視圖。 二8為本發明另—實施敗㈣鏡祕除前基座後的 不思園。 圖 9為本發明再—實施例之變焦鏡頭之導引件的示意 圖10 圖 1施例之變焦鏡頭的外殼的示意 圖11Α為本發明更—每^ 片的示意圖。 —貫施例之變焦鏡頭的弧形凸輪 圖11B為圖11A之i ^凸輪片與光學元件之配合的剖 Ι279587#^· doc/006 面示意圖。 圖12A為本發明再一實施例之變焦鏡頭的弧形凸輪 片的示意圖。 圖12B為圖12A之弧形凸輪片與光學元件之配合的剖 面示意圖。 【主要元件符號說明】 10、20、30、60 :鏡組 12、22、32、42 :凸輪銷 40 :驅動凸輪筒 50、55 :筒狀凸輪 52、57、72、92 :開槽 70 :鏡筒 80 :導桿 62 :凸輪銷 90 :平板凸輪 A-B :方向 300 :變焦鏡頭 310 :前基座 312 :開口 320 :後基座 324 :弧形槽 330、900 :導引件 340、1130、1230 :光學元件 342、344 :凸耳 15 12795^S^doc/006 346、1132、1232 ··凸起 342a、344a :開孔 350、1110、1210 :弧形凸輪片 352、1112、1212 :導引結構 354 :齒狀結構 360 :驅動馬達 362 :驅動齒輪 364 :傳動齒輪 380 :限位桿 390 :外殼 910 :導執 1120、1220 :彈簧 16Iff, and the rear pedestal, and has a plurality of guiding structures 352. The wide-arc cam piece 35〇 is equivalent to a cylindrical-partial shell plate, which moves with its curvature as the material turns to the guide structure 352 as the guiding groove, and the optical element 3 = Slide along the guiding structure 352. In other words, when the curvature axis is rotated as the rotation axis, the optical element guide 3 12795^^wfd〇c/〇〇6 structure 352 slides along the guide member bo by the movement of the projection 346. Thereby, the curved cam piece 350 can drive the respective optical elements 34A to achieve the purpose of optical zooming. Of course, the guiding structure of the curved cam in the present invention is not limited to the guiding groove, as long as it can cooperate with the protrusion of the optical element to drive the optical element. Further, the radius of curvature of the curved cam piece 35A of the present embodiment is, for example, larger than the radius of the optical element 340, and the curvature of the curved cam piece 350 is, for example, parallel but does not coincide with the optical axis of the optical element 34. According to FIG. 3 and FIG. 4, in the zoom lens 3 of the present embodiment, 10 is rotated from the curved cam piece 350, and its curvature axis is rotated as a rotation axis, so that no large movement is required. Space, and the purpose of reducing the volume can be achieved. Further, the assembly manner between the curved cam piece 35A and the optical member 34 is also much simpler than that of the conventional cylindrical cam, so that the assembly can be simplified. In addition, the rigidity of the curved cam piece 35 is greatly increased after being reduced, so that the optical elements 340 can be accurately driven in a predetermined manner. In other words, the Bech's under-focus lens 30Q is fully compatible with the trend of thin and light electronic products. Referring to Figures 3 and 4, after the present embodiment, the base 320 has an arcuate slot 324, and the trailing edge of the arcuate cam tab 35 is adapted to be snapped into the arc and slide along the slot 324. The radius of curvature of the arcuate groove 324 is the same as the radius of curvature of the arcuate cam piece 350. At the same time, the range of motion of the curved cam piece 35 can be appropriately limited by the curved groove. Of course, the front base mo may also have an arcuate groove corresponding to the arcuate groove 324, but here either the front base 31G and the rear base 32G may have: an arc 12 7^^^^^doc Fig. 7 is a front view of the zoom lens of Fig. 3 after the front base is removed. Please refer to Fig. 2, the zoom lens of the embodiment may further include a drive motor 360, having a drive gear 362. The curved cam piece 35 has a two-toothed structure 354 on the surface thereof, and the #-shaped structure 354 can be located at the edge portion or the trailing edge portion of the curved cam piece, and can be located on the inner surface or the outer surface of the curved cam piece. In other words, the position of the tooth structure 354 can be changed according to design requirements, and is not limited to the above position. The drive motor 36 is driven by the coupling of the drive gear 362 and the tooth structure 354. Convex: sheet L5 = arcuate groove 24 movement. In addition, one to several transmission gears 364 may be disposed between the driving gear 362 and the toothed knot. Of course, the arc=sheet 350 may also be manually moved. It is not limited to be driven by the drive 360. A vertical figure 8 is a separate zoom lens of the embodiment In the following, the yoke example differs from the previous embodiment in the manner of the curved cam piece 350. Therefore, the same members will be denoted by the same reference numerals. The zoom lens of the present embodiment further includes a plurality of limit bars 38G. The arcuate cam plate 350 is slidably disposed between the limit bars 38〇. The limit lever is used for the purpose of fixing the front base between the front base and the rear base 320. The position of the curved cam piece can rotate the curved cam piece 35〇 with its curvature axis as the rotating shaft. In addition, the front base and the rear base 32() can also be selectively matched with the curved groove. Figure f is a schematic diagram of a guide member of a zoom lens according to still another embodiment of the present invention. Fig. 3 and Fig. 9 show that the guide member 9 of the present embodiment has two V 910s. The member 9 (8) can replace the two guide rods of the guide member in Fig. 3, and the two lugs 342 and 344 of the optical element 340 are slidably disposed in the two guides as appropriate. As can be seen from the above, the present invention The guide of the zoom lens can also be designed in many variations as long as the device 340 is adapted to slide along its optical axis. A schematic diagram of a housing of a zoom lens according to still another embodiment. Please refer to FIG. 3 and FIG. 10. In the embodiment of the zoom lens of the present invention, an outer casing 390 may be further included, which is connected to the front base 31 and the rear. The base 32A and the cover guide 330, the optical element 34〇 and the curved cam piece 35〇. By the design of the outer casing 390, external light, dust and foreign matter can be prevented from contacting the inner member. It can be integrally formed with the front base 31G or the rear base 32. The curved cam piece of the change head is not intended, and FIG. 11B is the curved cam piece and the optical element of FIG. 11A. Referring to Figures 11A and 11B, in the present embodiment I, the guiding structure 1112 of the curved cam piece 1110 is in the form of a cutting surface. The change of the actual _, the mirror includes at least the material (10), connected between the two optical pieces 113G. Wherein, the spring is applied to keep the protrusion 1132 tightly pressed against the guiding structure (10). In the present embodiment, the guiding surfaces of the two guiding structures 1112 are opposite to each other while the spring 112 is When the pull 1130 is applied, the curved cam piece nif) is 艟n±rL+, and the protrusion 1132 will abut against the guide, the structure 111, and change with the guiding structure 1112. The distance between the optical elements 1130 is varied. In the guiding aspect of the structure 1112, if the two guiding edges 112 of the guiding knots 112 face each other, the spring (4) should apply a thrust 12 1279587^vvf.doc/006 (10) so that the protrusions (10) are in agreement with each other. The guiding piece: 咅: A is the curved cam figure of the zoom lens of the re-embodiment of the invention', and FIG. 12B is the curved cam piece of FIG. 12A and the optical ΐ: i:::: intended. Referring to Figures i2A and i2B, in the second embodiment, each of the =3 Γ zoom mirrors includes a plurality of springs 1222G that are connected to the door. The force applied to the wire element 123G by the yellow 122G is such that the protrusion is held against the guiding structure 1212. Specifically, in this embodiment, the spring 1220 is applied to the _shift forest coffee, so that the convex cam 122 will be pressed against the guiding structure m2 when the curved cam piece 210 is rotated. The two optical elements mo are moved for zooming. From this, it can be seen that the guide structure of the curved cam piece in the zoom lens of the present invention can be designed in many variations. In summary, the zoom lens of the present invention uses the guiding structure on the curved cam piece to guide the optical element (4) to change f. The towel, the piece is equivalent to the - part of the tube, and its movement is rotated by the axis of curvature axis ^ so it does not need to reserve a large moving space as the conventional flat cam needs to be reduced. volume. In addition, since the curved cam piece does not need to be assembled in a sleeve manner like a conventional cylindrical cam, it is not necessary to lock the cam pin to the optical element after the optical element and the cylindrical cam are engaged, so even a miniature Assembly after assembly is still extremely easy. In other words, the zoom lens of the present invention can fully conform to the design trend of light and thin electronic products, and can be applied to portable electronic products such as mobile phones such as 13 127958^^^〇^/〇〇6, and is highly competitive in the market. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and it is to be understood that those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. Sighing [Simplified illustration of the drawing] Fig. 1 is a morning view of the zoom lens proposed in U.S. Patent No. 4,974,949. , + Figure 2 is the illustration and diagram of the zoom lens proposed by the US Patent No. 514〇. FIG. 3 is a schematic diagram of a zoom lens according to an embodiment of the present invention. 4 is a schematic view of the zoom lens of FIG. 3 after the front base is removed. Figure 5 is a schematic view of the optical element of Figure 3. Figure 6 is a schematic view of the arcuate cam piece of Figure 3. =7 is the front view of the read lens of Figure 3 after removing the front base. The second 8 is the invention of the invention - the implementation of the defeat (four) mirror secret after the front pedestal. Figure 9 is a schematic view of a guide of a zoom lens according to a further embodiment of the present invention. Figure 10 is a schematic view of the outer casing of the zoom lens of the embodiment. Figure 11 is a schematic view of the present invention. - Curved Cam of the Zoom Lens of the Embodiment FIG. 11B is a cross-sectional view of the cross-section 279587#^· doc/006 of the cooperation of the cam piece and the optical element of FIG. 11A. Fig. 12A is a schematic view showing a curved cam piece of a zoom lens according to still another embodiment of the present invention. Figure 12B is a cross-sectional view showing the engagement of the curved cam piece of Figure 12A with the optical element. [Description of main component symbols] 10, 20, 30, 60: lens group 12, 22, 32, 42: cam pin 40: driving cam barrel 50, 55: cylindrical cam 52, 57, 72, 92: slot 70: Lens barrel 80: guide rod 62: cam pin 90: plate cam AB: direction 300: zoom lens 310: front base 312: opening 320: rear base 324: curved grooves 330, 900: guides 340, 1130, 1230: optical elements 342, 344: lugs 15 12795^S^doc/006 346, 1132, 1232 · · protrusions 342a, 344a: openings 350, 1110, 1210: curved cam pieces 352, 1112, 1212: guide Leading structure 354: tooth structure 360: drive motor 362: drive gear 364: drive gear 380: limit rod 390: outer casing 910: guide 1120, 1220: spring 16