201226965 六、發明說明： 【發明所屬之技術領域】 本發明係與鏡頭有關，特別是指一種變焦鏡頭。 【先前技術】 技術的發展日新月異，除了追求影像以高像 電子裝晋^出以两解析度品質呈現之外，搭配數位影像的 特點。例如作速度與較小的體積等技術 者使用於各種不_‘又等设備’為了能便於操作 最小化，而性能二::就必須做到能讓體積達到 可調設備的鏡頭’通常都具有 常具有設於固定座7()内之—前群二7；^^鏡頭通 74,二鐘當π ^則群鏡至72與一後群鏡室 驅動T即可於二4利用一設於固定座7〇旋轉之帶動輪％ 室72、74門的疋座7〇内同時旋轉且前後位移，改變二鏡 妙離’進而達成調整成像焦距之目的。 須跟著:來=數位影像設備的體積越做越小，鏡頭也必 座内比較益、去1 主使得鏡頭的組裝過程中，各鏡室在固定 了組裝上敎的位置’容易產生傾斜現象，増加 【發明内容】 頭，其 本發明之主要目的在於提供一種變焦鏡 201226965 整體結構於作動時可較為穩固。 為了達成上述目的 定座、-帶動輪，以"之L頁③含有-固 軸延伸之容置孔 二:鏡==定座具有沿一光 設於該固定座；細該光㈣如且可轉動地 座之容置孔内，至^ ^㈣沿該錄移動地設於該固定 當該帶動輪相對柯固^與該帶動輪相互連結；藉此， 邊固疋座内域靠近或遠離。 至於 本發明之各該鏡室更可具有_，料鏡筒係以气 練同軸地設於咖定座之容置孔，婦二該鏡筒之^ =具有—嵌合部，另—該鏡筒具有—錄，該二相鄰之 ’兄:於該固疋座内相互靠近時’該嵌合部可嵌入該嵌槽， 而田4一相鄰之鏡筒相互遠離時，該嵌合㈣㈣該嵌槽。 本發明之其中—該鏡筒之端面設置-環垣，該環垣之 外周具有至少二向外凸伸之延伸部，該二延伸部間形成 該嵌槽。 藉由本發明之第-鏡室與第二鏡室之間係以各嵌合部 直接靠抵於各賴及環垣，二者相絲合可增加結構作動 時之穩定性。 【實施方式】 為了詳細說明本發明之結構、特徵及功效所在，茲列 舉一較佳實施例並配合圖式說明如後，其中： 第一圖為本發明一較佳實施例之立體分解圖。 201226965 第二圖為本發明一較佳實施例之部份剖視圖，其中第 一鏡室與第一鏡室之間係呈相互遠離狀態。 第三圖為本發明一較佳實施例之立體部分分解圖，其 中第一鏡室之嵌合部嵌入第二鏡室之嵌槽。 第四圖為本發明一較佳實施例之部份剖視圖，其中第 一鏡室之嵌合部嵌入第二鏡室之嵌槽。 請參閱第-圖及第二圖，本發明一較佳實施例所提供 之變焦鏡頭10 ’包含有—固定座20、-帶動輪3〇、一第 -鏡室40，以及-第二鏡室5〇，本變焦鏡頭1〇可適用於 攝像設備或是投影裝置。 ' 該固定座20具有呈環狀之一第一周壁22與一第二 壁24’第-周壁22及第二周壁24中央形成出一沿光轴u 延伸之容置孔26。第-周壁22之壁面穿設若干第—導样 28，各第一導槽28係與光軸18平行地延伸。 9 該帶動輪30亦呈環狀，帶動輪3〇之壁面具有若 • 三導槽32 ’各第二導槽32以具有預定斜度地傾斜延伸 帶動輪30。帶動輪30係以光軸18為軸心套設於固定座； 之第-周壁22 ’各第二導槽32位置對應於各第一導样μ 位置，帶動輪3〇可相對於固定座2〇轉動。 均 該第-鏡室4G與該第二鏡室％可設計為前群鏡室斑 後群鏡室，第一鏡室40具有一第一鏡筒42，第一鏡筒々I 之後端面設置-環垣44，環垣44之外周具有三弧二^ 部46’三延伸部46係等角排列於第一鏡筒42之後端面， 且自後端面向外凸伸’藉由相鄰之延伸部46間形成出二山 201226965 槽48。第二鏡室5〇亦具有一第二鏡筒52，第二鏡筒52 之前端面等角設置三向外延伸之嵌合部54。 第一鏡室40與第二鏡室50係以同軸於光軸18地鄰5又 於固定座20之容置孔26内，第一鏡室40位於第〆周雙 22内側’第二鏡室5〇位於第二周壁24内側，第一鏡室40 與第二鏡室5〇藉由若干連結件(圖中未示）穿經帶動輪30 之各第二導槽32與固定座20之各第一導槽28，進而固定 於各嵌合部54與延伸部46,使第一鏡室40及第二鏡室50 皆連結於帶動輪30，使帶動輪30可帶動第一及第二鏡室 40、50於固定座2〇内移動。 透過上述本發明之組成構件，如第二至第四圖所示， 當帶動輪30相對於固定座20原地旋轉時，利用朝斜向延 伸之第一導槽28’即可帶動連結件沿著第二導槽32位移， 進而驅使第一鏡室40與第二鏡室50於固定座20内移動且 不轉動地相對靠近或遠離。如第三及第四圖所示，當第一 及第一鏡室40、50相互靠近時，第二鏡筒52之嵌合部54 係伸入第一鏡筒42之嵌槽48内，直至彼合部54接觸於環 垣44，使第一鏡室40與第二鏡室50之間相互抵接而嵌 合。而當第一及第一鏡室40、50相互遠離時，第二鏡汽 52之嵌合部54亦可沿著嵌槽48移離第一鏡筒42。 藉由此方式’本發明之第一鏡室40與第二鏡室5〇之 間係以各嵌合部54直接靠抵於各嵌槽48及環垣44，二者 較為緊密地相互嵌合，増加結構作動時之穩定性。 201226965 本發明除了如前述較佳實施例應用於二組鏡室之變焦 鏡頭之外，可另外應用於具有二組以上鏡室之鏡頭。而嵌 合部與嵌槽之設計亦可為直線或是螺旋狀，結構型態也可 互換，只要設計在二鏡室的相鄰接處。 本發明於前揭實施例中所揭露的構成元件，僅為舉例 說明，並非用來限制本案之範圍，其他等效元件的替代或 變化，亦應為本案之申請專利範圍所涵蓋。 201226965 【圖式簡單說明】 第一圖為本發明一較佳實施例之立體分解圖。 第二圖為本發明一較佳實施例之部份剖視圖，其中第 一鏡室與第二鏡室之間係呈相互遠離狀態。 第三圖為本發明一較佳實施例之立體部分分解圖，其 中第一鏡室之嵌·合部嵌·入第二鏡室之嵌槽。 第四圖為本發明一較佳實施例之部份剖視圖，其中第 一鏡室之嵌·合部嵌·入第二鏡室之嵌槽。 第五圖為習用變焦鏡頭之剖視圖。 第六圖類同於第五圖，主要顯示習用變焦鏡頭之鏡室 相互靠近之狀態。 【主要元件符號說明】 變焦鏡頭10 光轴18 固定座20 第一周壁22 第二周壁24 容置孔26 第一導槽28 帶動輪30 第二導槽32 第一鏡室40 第一鏡筒42 環垣44 延伸部46 嵌槽48 第二鏡室50 第二鏡筒52 嵌合部54201226965 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a lens, and more particularly to a zoom lens. [Prior Art] The development of technology is changing with each passing day. In addition to pursuing images with high image quality, the image is characterized by two-resolution images. For example, the speed and the smaller volume are used by various technicians in various devices, in order to facilitate the operation, and the performance of the second:: the lens that can achieve the volume of the adjustable device is usually It has a pre-group 2 7 in the fixed seat 7 (); ^^ lens pass 74, two clocks when π ^ then group mirror 72 and a rear group mirror room drive T can be used in two 4 At the same time, the rotation of the fixed seat 7〇 rotates the chambers 72, 74, and the squats 7〇 simultaneously rotate and shift back and forth, changing the second mirror to achieve the purpose of adjusting the imaging focal length. Must be followed: the size of the digital video device is getting smaller and smaller, the lens must be more convenient, and the main lens is assembled. During the assembly process of the lens, the position of each mirror chamber is fixed.发明加[Inventive content] Head, the main purpose of the present invention is to provide a zoom lens 201226965 overall structure can be relatively stable when operating. In order to achieve the above purpose, the carrier is driven, and the L-page 3 of the "-receiving hole is accommodated in the hole 2: the mirror == the seat has a light disposed along the fixed seat; the light (four) is The inside of the accommodating hole of the rotatable seat is arranged to be fixed to the fixed position along the recording position when the driving wheel is coupled with the driving wheel; thereby, the inner region of the solid seat is close to or away from the driving wheel . As for each of the mirror chambers of the present invention, the mirror tube can be coaxially disposed on the accommodating hole of the coffee seat, and the second lens of the lens tube has a fitting portion and the mirror. The tube has a recording, and the two adjacent 'brothers: when the two are in close proximity to each other in the solid seat, the fitting portion can be embedded in the recessed groove, and when the adjacent barrels of the field 4 are away from each other, the fitting (four) (four) The slot. In the present invention, the end surface of the lens barrel is provided with a ring, and the outer circumference of the ring has at least two outwardly extending extension portions, and the insertion grooves are formed between the two extension portions. By the first mirror chamber and the second mirror chamber of the present invention, the fitting portions directly abut against the respective loops, and the stitching of the two can increase the stability of the structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to explain the structure, features, and advantages of the present invention in detail, the preferred embodiments of the invention are illustrated in the accompanying drawings. 201226965 The second figure is a partial cross-sectional view of a preferred embodiment of the present invention in which the first mirror chamber and the first mirror chamber are in a mutually distant state. The third figure is a perspective exploded view of a preferred embodiment of the present invention, in which the fitting portion of the first mirror chamber is embedded in the recess of the second mirror chamber. The fourth figure is a partial cross-sectional view of a preferred embodiment of the invention in which the fitting portion of the first mirror chamber is embedded in the recess of the second mirror chamber. Referring to the first and second figures, a zoom lens 10' according to a preferred embodiment of the present invention includes a fixing base 20, a driving wheel 3, a first mirror chamber 40, and a second mirror chamber. 5〇, this zoom lens 1〇 can be applied to an imaging device or a projection device. The fixing base 20 has a ring-shaped first peripheral wall 22 and a second wall 24'. The first peripheral wall 22 and the second peripheral wall 24 form a receiving hole 26 extending along the optical axis u. A plurality of first guides 28 are bored through the wall surface of the first peripheral wall 22, and each of the first guide grooves 28 extends parallel to the optical axis 18. 9 The driving wheel 30 is also annular, and the wall surface of the driving wheel 3 has a second guiding groove 32 of each of the three guiding grooves 32' to obliquely extend the driving wheel 30 with a predetermined inclination. The driving wheel 30 is sleeved on the fixing base with the optical axis 18 as an axial center; the second guiding groove 32 of the first circumferential wall 22' corresponds to the position of each first guiding sample μ, and the driving wheel 3〇 is opposite to the fixing seat 2 〇 Rotate. The first mirror chamber 4G and the second mirror chamber % can be designed as a front group mirror chamber rear group mirror chamber, and the first mirror chamber 40 has a first lens barrel 42, and the first lens barrel 々I is disposed after the end surface - The ring 44 has a three-arc portion 46' on the outer circumference of the ring 44. The three extensions 46 are equiangularly arranged on the rear end surface of the first barrel 42 and protrude outward from the rear end surface by the adjacent extension portion. 46 rooms formed the second mountain 201226965 slot 48. The second mirror chamber 5〇 also has a second lens barrel 52, and the second lens barrel 52 is provided with three outwardly extending fitting portions 54 at the front end corners. The first mirror chamber 40 and the second mirror chamber 50 are coaxial with the optical axis 18 and are disposed in the receiving hole 26 of the fixing base 20, and the first mirror chamber 40 is located inside the second circumference of the second circumference. 5〇 is located inside the second peripheral wall 24, and the first mirror chamber 40 and the second mirror chamber 5 are respectively passed through the second guiding groove 32 and the fixing base 20 of the driving wheel 30 by a plurality of connecting members (not shown). The first guiding groove 28 is further fixed to each of the fitting portion 54 and the extending portion 46, so that the first mirror chamber 40 and the second mirror chamber 50 are all coupled to the driving wheel 30, so that the driving wheel 30 can drive the first and second mirrors. The chambers 40, 50 move within the fixed seat 2''. Through the above-mentioned constituent members of the present invention, as shown in the second to fourth figures, when the driving wheel 30 is rotated in situ with respect to the fixing base 20, the first guiding groove 28' extending obliquely can be used to drive the connecting member along the edge. The second guiding groove 32 is displaced, thereby driving the first mirror chamber 40 and the second mirror chamber 50 to move in the fixing base 20 and relatively close to or away from each other without rotation. As shown in the third and fourth figures, when the first and first mirror chambers 40, 50 are close to each other, the fitting portion 54 of the second barrel 52 extends into the recess 48 of the first barrel 42 until The engaging portion 54 is in contact with the ring 44, and the first mirror chamber 40 and the second mirror chamber 50 are brought into contact with each other to be fitted. When the first and first mirror chambers 40, 50 are apart from each other, the fitting portion 54 of the second mirror 52 can also move away from the first barrel 42 along the recess 48. In this way, the first mirror chamber 40 and the second mirror chamber 5〇 of the present invention are directly abutted against the respective recesses 48 and the loops 44 by the fitting portions 54, and the two are closely fitted to each other. , the stability of the structure when it is activated. 201226965 The present invention can be additionally applied to a lens having two or more mirror chambers, in addition to the zoom lens applied to the two mirror chambers as in the foregoing preferred embodiment. The design of the fitting portion and the groove can also be straight or spiral, and the structural patterns can also be interchanged as long as they are designed adjacent to the two mirror chambers. The constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention. The alternative or variations of other equivalent elements are also covered by the scope of the patent application. 201226965 [Simplified description of the drawings] The first figure is an exploded perspective view of a preferred embodiment of the present invention. The second drawing is a partial cross-sectional view of a preferred embodiment of the invention in which the first mirror chamber and the second mirror chamber are in a mutually distant relationship. The third figure is an exploded perspective view of a preferred embodiment of the present invention, in which the embedded portion of the first mirror chamber is embedded in the recess of the second mirror chamber. The fourth figure is a partial cross-sectional view of a preferred embodiment of the present invention in which the embedded portion of the first mirror chamber is embedded in the recess of the second mirror chamber. The fifth figure is a cross-sectional view of a conventional zoom lens. The sixth figure is similar to the fifth figure, and mainly shows the state in which the mirror chambers of the conventional zoom lens are close to each other. [Main component symbol description] Zoom lens 10 Optical axis 18 Fixing seat 20 First peripheral wall 22 Second peripheral wall 24 accommodating hole 26 First guide groove 28 Driving wheel 30 Second guide groove 32 First mirror chamber 40 First lens barrel 42 ring 44 extension 46 slot 48 second mirror 50 second barrel 52 fitting portion 54