200903142 九、發明說明： 【發明所屬之技術領域】 本發明是有關於—種鏡頭模組，特別是指—種利用磁 力控制鏡組移動以進行變焦的鏡頭模組。 【先前技術】 應用於資訊電子產品的鏡頭模組例如行動電話或 PDA之鏡頭模組，由於考量整體產品體積及成本等因辛， 常會捨棄常用於數位相機中，以步進馬達搭配齒輪來㈣ 鏡組移動之自動變焦裝置，而改以手動方式調整鏡組移動 來進行變焦。 然而，對於使用者而言，以手動方式變焦當然並非理 想的操作方式，因此，如何設計-種體積小且具有成本優 勢之自動變焦鏡頭模組，以適用於資訊電子產品，便成為 眾多相關業者所積極開發的方向。 【發明内容】 因此’本發明之目# ’即在提供—種體積小且具有成 本優勢之磁控變焦鏡頭模組。 於是，本發明之磁控變焦鏡頭模組，包含一鏡組、一 基座、-鏡座、一凸輪機構，以及至少一磁控翠元；鏡組 具有一光軸；基座形成一沿光軸軸向延伸之容置槽；鏡座 J繞光軸軸向轉動地設於容置槽内且供鏡組繞光軸軸向裝 没，凸輪機構設於鏡座與基座鄰接處，用以使鏡座相對基 座轉動時，鏡座可同時相對基座沿光軸軸向移動；磁控單 元具有一設於鏡座的磁鐵、以及一設於基座的電磁線圈， 200903142 磁鐵受電磁線圈實質沿光轴徑向之磁力作用，帶動鏡座於 容置槽内繞光軸轴向轉動。 本發明即藉由上述凸輪機構與磁控單元的配合，使鏡 座在相對基座轉動的同時，可相對基座沿料 【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。 如圖1與圖2所示，本發明磁控變焦鏡頭模組之較佳 實施例包含一鏡組21、一基座22、一於广λ 1 巷座22、鏡座23、一凸輪機構 24、二磁控單元25、一殼蓋26,以及一彈性件27。 鏡組21以—鏡筒容置至少—片聚焦透鏡，且鏡筒大體 呈一沿透鏡之光軸ΟΑ軸向延伸之圓柱形。鏡筒之外周壁上 形成有螺紋211。 如圖1與圖3所示’基座22形成一容置槽，容置 槽22!大體界^出―沿光軸〇Α轴向延伸之圓柱形空間並 具有二沿光軸ΟΑ徑向放射延伸之扇形部222。 鏡座23大體呈一沿光軸〇Α軸向延伸且内周壁與鏡組 21形狀配合之圓環形，沿妹〇Α軸向可轉動地設於基座 22之谷置槽221 $，鏡座23之内周壁上形成有螺紋加， 供鏡組之螺紋211配合以沿光軸〇α轴向螺設於其中， 並且鏡座23具有二相反地沿光轴徑向放射延伸至兩扇形 部222内的耳部232，耳部232可於扇形部222所界定之空 間繞光軸ΟΑ軸向轉動。 200903142 如圖3及圖4所示，凸輪機構24設置於鏡座23與基 座22相互鄰接處’其各具有三形成於鏡座23上且繞光轴 OA轴向旋轉地且傾斜地朝基座22延伸之第—斜面部w， 乂及一形成於基座22上且繞光軸〇A軸向旋轉地且傾斜地 朝鏡座23延伸之第二斜面部242。 所示第—、第二斜面部241、242相互配合地 接觸設置，使鏡座23相對基座22轉動時，藉第—斜面部 241與第二斜面部242之相對運動，鏡座23可同時相對基 座22沿光軸軸向（圖中向上方向）移動。其中，第―、第二 斜面部241、242相接觸的斜面，除可為圖5中之斜率固定 的平面以外’亦可為兩相配合且斜率對應變化的曲面。 此外，需說明的是’習知將轉動改變為直線移動的凸 輪機構種類繁多，皆可用以代替本實施例中之凸輪機構Μ ，不以本實施例所揭示之方式為限。 如圖1所示，基座22在對應該等扇形部222的200903142 IX. Description of the Invention: [Technical Field] The present invention relates to a lens module, and more particularly to a lens module that uses a magnetic force control lens group to move for zooming. [Prior Art] Lens modules used in information electronics, such as mobile phone or PDA lens modules, are often used in digital cameras because of the overall product size and cost, with stepper motors and gears (4) The mirror moves the automatic zoom device, and manually adjusts the lens movement to zoom. However, for the user, manual zooming is of course not an ideal operation. Therefore, how to design a small-sized and cost-effective automatic zoom lens module for use in information electronics has become a related industry. The direction of active development. SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a magnetron zoom lens module which is small in size and has cost advantages. Therefore, the magnetron zoom lens module of the present invention comprises a mirror group, a base, a mirror base, a cam mechanism, and at least one magnetic control emerald; the mirror group has an optical axis; and the base forms a light along the light The axially extending receiving groove of the shaft; the mirror base J is axially rotatably disposed in the accommodating groove around the optical axis and is axially mounted on the optical axis of the lens assembly, and the cam mechanism is disposed adjacent to the mirror base and the base, and is used When the lens holder is rotated relative to the base, the lens holder can simultaneously move axially relative to the base along the optical axis; the magnetron unit has a magnet disposed on the lens holder and an electromagnetic coil disposed on the base, 200903142 magnet is electromagnetically The magnetic force of the coil substantially along the radial direction of the optical axis drives the mirror base to rotate axially around the optical axis in the accommodating groove. According to the present invention, the above-mentioned and other technical contents, features and effects of the present invention can be made relative to the base while the mirror base is rotated relative to the base by the cooperation of the above-mentioned cam mechanism and the magnetic control unit. In the following detailed description of a preferred embodiment with reference to the drawings, it will be clearly understood. As shown in FIG. 1 and FIG. 2, a preferred embodiment of the magnetron zoom lens module of the present invention comprises a mirror group 21, a base 22, a wide λ 1 alley 22, a mirror base 23, and a cam mechanism 24. Two magnetic control units 25, a cover 26, and an elastic member 27. The lens assembly 21 houses at least a focusing lens with a lens barrel, and the lens barrel has a cylindrical shape extending substantially in the axial direction of the optical axis of the lens. A thread 211 is formed on the outer peripheral wall of the lens barrel. As shown in FIG. 1 and FIG. 3, the pedestal 22 forms a accommodating groove, and the accommodating groove 22 has a cylindrical space extending along the optical axis 并 and has two radial directions along the optical axis. An extended sector 222. The lens holder 23 is substantially in the shape of a circular ring extending axially along the optical axis and having an inner peripheral wall and a shape of the lens assembly 21, and is rotatably disposed along the axial direction of the sister in the valley groove 221 $ of the base 22, the mirror A thread is formed on the inner wall of the seat 23, and the thread 211 of the lens group cooperates to be screwed in the axial direction of the optical axis 〇α, and the mirror base 23 has two opposite radial directions extending along the optical axis to the two sectors. The ear portion 232 in the 222 can be axially rotated about the optical axis 于 in the space defined by the scallop 222. As shown in FIG. 3 and FIG. 4, the cam mechanism 24 is disposed at a position adjacent to the mirror base 23 and the base 22, each of which has three formed on the mirror base 23 and axially rotated about the optical axis OA and obliquely facing the base. The extended elbow portion w, and a second inclined surface portion 242 formed on the base 22 and axially rotatable about the optical axis A and obliquely extending toward the lens holder 23. The first and second inclined surface portions 241 and 242 are disposed in cooperation with each other. When the lens holder 23 is rotated relative to the base 22, the lens holder 23 can simultaneously move by the relative movement of the first inclined surface portion 241 and the second inclined surface portion 242. The base 22 is moved in the axial direction of the optical axis (upward direction in the drawing). The inclined surface in which the first and second inclined surface portions 241 and 242 are in contact may be a curved surface in which the two phases are matched and the slope correspondingly changes, except for the plane in which the slope of FIG. 5 is fixed. In addition, it should be noted that the conventional cam mechanism in which the rotation is changed to a linear movement can be used in place of the cam mechanism in the present embodiment, and is not limited to the manner disclosed in the embodiment. As shown in FIG. 1, the pedestal 22 corresponds to the sector 222.
側面處，各設有一繞線槽223。該等磁控單元乃各具 口又於鏡座23的一耳部232内的成描 斗1 232内的磁鐵251、以及—環繞設置 於一繞線槽223的電磁線圈252。 如圖i與圖6所示，磁鐵251之N_s兩磁極沿實質垂 以之平面上設置，而電磁線圈252則可受電源驅動 發Γ地沿光軸。A徑向延伸之磁力6。當電磁線：At the side, each of the winding grooves 223 is provided. The magnetrons are magnets 251 in the bucket 1 232, respectively, in an ear portion 232 of the lens holder 23, and an electromagnetic coil 252 disposed around a winding slot 223. As shown in Fig. i and Fig. 6, the N_s two magnetic poles of the magnet 251 are disposed along a substantially vertical plane, and the electromagnetic coil 252 is driven by the power source along the optical axis. A magnetic force 6 extending radially. When the magnet wire:
252發出如圖6所示之眘暂、VL水η A252 issued a cautionary, VL water η A as shown in Figure 6.
π不之實質/口先軸0A#向之磁力B 驅使磁鐵251之N福播内诚* R说m '會 極趨向磁力B作用方向，並驅 251之S極遠離磁力B作用方向，如 刀Β作用方向如此，便可帶動鏡座23 7 200903142 於基座22之容置槽221内繞光轴OA軸向逆時針轉動， 之，當電磁線圈252發出反向於圖6所示之實質沿光軸 徑向之磁力B時，則會帶動鏡座23於基座22 為"置槽221 内繞光軸OA軸向順時針轉動。並且，藉由扇形部2 兩 相反的邊界來分別界定耳部232於其内以順時針及逆昉 轉動的兩個停止點。 ' 如圖1與圖2所示，殼蓋26配合地蓋設於基座22上 且供鏡組21穿出。彈性件27則設於殼蓋26與鏡座23之 間，用以提供鏡座23向基座22方向下壓的彈力，使凸輪 機構24之第一斜面部241確實接觸於第二斜面部上。 在本實施例中彈性件27以一金屬彈性墊圈為例，實際實施 時，亦可以金屬彈簧，或是如橡膠、矽膠等具有彈性之膠 材所製成之墊圈代替。 ^ 歸納上述，本發明藉由將凸輪機構24設於鏡座B與 基座22之鄰接處，並且利用將磁鐵251設置於鏡座乃、電 磁線圈252設置於基座22，使磁鐵251受電磁線圈说之 磁力作用，使鏡座23於基座22之容置槽221内繞光轴〇a 車向轉動1¾日7帶動鏡組21沿光軸軸向移動，無須額外設 置步進馬達及齒輪等裝置，可縮減體積並減少成本，確實 達成本發明之功效。 &惟以上所述者，僅為本發明之較佳實施例而已，當不 此：< 此限疋本發明實施之範圍，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飾，皆仍 屬本發明專利涵蓋之範圍内。 200903142 【圖式簡單說明】 圖1是本發明磁控變焦鏡頭模組之較佳實施例的立體 分解圖； 圖2是本較佳實施例之立體組合圖； 圖3是本較佳實施例之基座的立體圖； 圖4是本較佳實施例之鏡座的立體圖； 圖5是本較佳實施例之示意圖，說明基座與鏡座之相 對運動；及 圖6是本較佳實施例之示意圖。 200903142 【主要元件符號說明】 21…… ----鏡組 24…… …·凸輪機構 211… •…螺紋 241 ··· —弟 斜面部 22…… 基座 242… •…第二斜面部 221 ·· •…容置槽 25 ··.· •…磁控單元 222… 扇形4 251… —磁鐵 223… •…繞線槽 151… …··電磁線圈 23··.·. •…鏡座 26··.·. …·殼蓋 231… …·螺紋 27·_·.· •…彈性件 232… •…耳部 ΟΑ.·_· —光軸 10π 不 身体 / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / The direction of action is such that the mirror holder 23 7 200903142 can be rotated counterclockwise about the optical axis OA in the receiving groove 221 of the base 22, and when the electromagnetic coil 252 is opposite to the substantial light shown in FIG. When the magnetic force B of the shaft is radial, the mirror base 23 is driven to rotate clockwise around the optical axis OA in the groove 221 of the base 22 . Also, the two stop points in which the ear portion 232 is rotated clockwise and reversely are respectively defined by the opposite boundaries of the sector portion 2, respectively. As shown in Fig. 1 and Fig. 2, the cover 26 is fitted over the base 22 and is provided for the lens assembly 21. The elastic member 27 is disposed between the cover 26 and the lens holder 23 to provide an elastic force for pressing the lens holder 23 downwardly toward the base 22, so that the first inclined surface portion 241 of the cam mechanism 24 is surely contacted with the second inclined surface. . In the present embodiment, the elastic member 27 is exemplified by a metal elastic gasket. In actual practice, a metal spring or a gasket made of an elastic rubber such as rubber or silicone rubber may be used instead. ^ In summary, in the present invention, the cam mechanism 24 is disposed at the abutment of the lens holder B and the base 22, and the magnet 251 is placed on the mirror base, and the electromagnetic coil 252 is disposed on the base 22, so that the magnet 251 is electromagnetically The magnetic force of the coil is such that the lens holder 23 moves in the accommodating groove 221 of the susceptor 22 around the optical axis 〇a. The driving group 21 moves along the optical axis in the axial direction without any additional stepping motor and gear. Such devices can reduce the volume and reduce the cost, and indeed achieve the effects of the present invention. The above is only the preferred embodiment of the present invention, and is not limited to the scope of the present invention, that is, the simple scope of the patent application scope and the description of the invention. Equivalent variations and modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective exploded view of a preferred embodiment of a magnetron zoom lens module of the present invention; FIG. 2 is a perspective assembled view of the preferred embodiment; FIG. Figure 4 is a perspective view of the lens holder of the preferred embodiment; Figure 5 is a schematic view of the preferred embodiment illustrating the relative movement of the base and the lens holder; and Figure 6 is a preferred embodiment of the present invention. schematic diagram. 200903142 [Explanation of main component symbols] 21... ----Mirror group 24............Cam mechanism 211...•...Thread 241 ··· —Side slanting surface 22... Base 242... •...Second inclined surface 221 ····... accommodating groove 25 ····•...Magnetic control unit 222... Sector 4 251...-Magnet 223... •... Winding groove 151... Electromagnetic coil 23··.·. ····. ...·Shell cover 231...·Thread 27·_···•...elastic member 232... •...ear ΟΑ.·_· —optical axis 10