200819904 九、發明說明： 【發明所屬之技術領域】 本發明提供一種鏡頭模組，尤其涉及一種可調焦梦一 模組。 w…兄頭 【先前技術】200819904 IX. INSTRUCTIONS: [Technical Field] The present invention provides a lens module, and more particularly to an adjustable focus module. w...brothers [prior art]
隨著多媒體技術的發展’數位相機、攝影機越來越為 廣大消費者所青睞’在人們對數位相機、攝影機追求小型 化的同時，又希望在同一位置可拍攝遠近距離不同的影 像，且獲得清晰的圖像晝面，而且應用於移動電爷的數位 相機模組還要滿足輕薄短小的要求，因此調焦相機應運而 生，而相機的調焦通常係通過相機内的鏡頭的移動來實現。 鏡頭模組通常包括一鏡頭，一鏡頭座，一螺釘，一彈 簧，一鏡筒，複數個鏡片及一頂蓋等主要構件組成。拍攝 物體時，當被攝物在遠處時’物體的成像點恰位於互補金 屬氧化物半導體（c〇mplementary Metal_〇xideWith the development of multimedia technology, digital cameras and video cameras are becoming more and more popular among consumers. While people are pursuing miniaturization of digital cameras and cameras, they hope to capture images with different distances at the same location. The image of the camera is also applied to the digital camera module of the mobile phone. The focus camera is also required, and the focus of the camera is usually achieved by the movement of the lens inside the camera. The lens module usually comprises a lens, a lens holder, a screw, a spring, a lens barrel, a plurality of lenses and a top cover. When shooting an object, when the subject is far away, the image of the object is located at the complementary metal oxide semiconductor (c〇mplementary Metal_〇xide)
Semiconductor，下稱CMOS)影像傳感裝置上，彈簧呈壓縮 狀態，當被攝物在近處時，欲在CMOS影像傳感裝置上得 到該被攝物的清晰圖像，需調整鏡片與CM〇s影像傳感裝 置間的距離，使被攝物的成像點位於CM〇s影像傳感裝置 位置處，通過手或一外部工具使螺釘在鏡頭座的通孔内逆 時針旋轉，鏡頭在彈簧的彈性力作用下在鏡頭座内作一穩 定且線性的移動，可通過數碼相機外部的顯示幕判斷聚焦 正確與否，使鏡頭模組聚焦於正確的拍攝位置上。 7 200819904 ν' t該鏡頭模組在對焦的過程中，因要調整鏡片與CMOS 影像傳感裝置間及鏡片間的距離，使得鏡頭模組總的軸向 長度會有變化，所以在鏡頭座中必須設置可以讓鏡頭來回 活動的空間，從而增大了鏡頭模組之體積。 【發明内容】 有鑒於此，有必要提供一種對焦時能保持鏡頭模組總 的轴向長度不變的鏡頭模組。 ^ 一種鏡頭模組，包括一用於成像的鏡頭組及一個與該 鏡頭組相嚙合的齒輪組，該鏡頭組包括用於容置光學元件 的一個鏡筒以及套設於該鏡筒兩端的一個第一套筒、一個 第二套筒。所述第一、第二套筒的位置固定。在所述鏡筒 外侧壁上設置有輪齒。在第二套筒内侧壁及與第二套筒相 對應的鏡筒之一端外侧壁分別設有相配合的螺紋。所述齒 輪組包括至少一個齒輪，該齒輪與鏡筒外側壁上的輪齒相 對應，控制該鏡筒移動以對焦。 p 該鏡頭模組通過設置在鏡頭組外部的齒輪來進行調 焦，利用該齒輪在實現對焦的同時，因第一、第二套筒的 位置固定，從而保證了所述鏡頭模組在總的軸向長度保持 不變。 【實施方式】 為了對本發明作更進一步的說明，舉以下較佳實施例 並配合圖式詳細描述如下。 請參閱圖1、圖2及圖3,本發明實施例一的鏡頭模 組包括一個用於成像的鏡頭組10及一與該鏡頭組10相嚙 8 200819904 合的齒輪20，通過該齒輪20之旋轉可控制所述鏡頭組10 進行對焦。 所述鏡頭組1〇包括用於容置光學元件的一個第一套 筒11、一個第二套筒12以及一個鏡筒13。該第一套筒11 與第二套筒12都分別套設在所述鏡筒13之兩端。 該第一套筒11固定在鏡頭座（圖未示）中，在該第一套 筒11内壁可以設置内螺紋也可以不設置内螺紋，在本實例 中設置有内螺紋no。在該第一套筒11中設置有至少一個 * 光學元件。在本實施例中設置有一個濾光片31、一個間隔 環32及一個鏡片33。 該第二套筒12固定在鏡頭座（圖未示）中，在該第二套 筒12内壁設有與所述第一套筒11之内螺紋11〇之螺旋方 向相反的内螺紋120。在該第二套筒12中設置有至少一個 光學元件。在本實施例中設置有一個用於感測影像的影像 感測器34。 ^ 該鏡筒13包括與第一套筒11相配合的第一外螺紋端 131、與第二套筒12相配合的第二外螺紋端132以及與第 一外螺紋端131、第二外螺紋端132相連的連接部133。優 選地，所述第一外螺紋端131、第二外螺紋端132與連接 部133，體成形。該鏡筒13中設置有至少一個光學元件， 本實施例中設置有一個鏡片35。 所述第一外螺紋端131與第一套筒11之内螺紋11〇 相配合，且第一外螺紋端131之螺紋之軸向長度大於第一 套筒11之内螺故11()之轴向長度。 9 200819904 .所述第二外螺紋端132與第二套筒12之内螺紋120 相配合，且第二外螺紋端132之螺紋之轴向長度大於第二 套筒12之内螺紋120之軸向長度。 所述連接部133之外側壁設置有輪齒134。 所述齒輪20之外侧壁設置有輪齒201，旋轉該齒輪 20，通過該齒輪20之輪齒201與鏡筒13之連接部133之 輪齒134配合，控制該鏡筒13活動以對焦。 所述齒輪20套設在轴21上，該轴21固定在鏡頭座（圖 ® 未示）中。該轴21的轴向長度根據鏡頭座的需要設定。 請參閱圖4,本發明實施例二的鏡頭模組包括一個用 於成像的鏡頭組50及一與該鏡頭組50相喊合的齒輪組 40，通過該齒輪組40之旋轉可控制所述鏡頭組40進行對 焦及微調。 所述鏡頭組50包括如實施例一所述的鏡筒13以及套 設於該鏡筒13兩端之第一套筒11、第二套筒53，且該第 _ 二套筒53之外侧壁設置有輪齒531。 該齒輪組40包括一個與鏡筒13之連接部133相配合 的第一齒輪41以及一個與第二套筒53相配合的第二齒輪 42。該第一齒輪41與第二齒輪42通過同一根軸43活動相 連，且可相對於該轴43自由活動。優選地，所述第一齒輪 41與第二齒輪42之直徑相等。 所述第一齒輪41之外側壁設置有與鏡筒13之連接部 133的輪齒134相配合的輪齒411，該第一齒輪41之軸向 長度根據需要設定。例如，該第一齒輪41之轴向長度等於 200819904 » 或*大於所述連接部13 3之長度。 所述第二齒輪42之外側壁設置有與第二套筒53之輪 # 531相配合的輪齒421 ’該第二齒輪42之軸向長度根據 需要設定。例如，該第二齒輪42之軸向長度等於或大於所 述第二套筒53之長度。 所述第一齒輪41之輪齒411模數大於或等於第二齒輪 42的輪齒421之模數。 鲁 所述轴43固定在鏡頭座（圖未示）中。該轴43的軸向 長度根據鏡頭座的需要設定。 所述苐一齒輪41通過其輪齒411可以控制鏡筒η之 連接部133活動以對焦。另外，該第二齒輪42之輪齒421 的模數小於第一齒輪41之輪齒411的模數，可通過第二齒 輪42之輪齒421旋轉第二套筒53以進行微調。 該鏡頭模組因设置了齒輪20及齒輪組4〇，且該齒輪 20及齒輪組40在鏡頭組10、5〇之外部與該鏡頭組1〇、5〇 • 嚙合並控制該鏡頭組10、5〇進行對焦，同時，鏡頭組10、 50的總的長度保持不變，從而可保證該鏡頭組ι〇、5〇總 的軸向長度不會因調焦而變化。 綜上所述，本發明符合發明專利要件，爰依法提出 專利申，。惟，以上所述者僅為本發明之較佳實施例，本 發明之範圍並*以上述實施例為限，舉凡熟習本案技藝之 人士援依本發明之精神所作之等效修倚或變化，皆應涵蓋 於以下申請專利範圍内。 11 200819904 馨 【凋式簡單說明】 圖1係本發明實施例一的鏡頭模組之部分分解結構示 意圖； 圖2係圖1中的鏡頭模組中的鏡頭組之分解結構示意 圖； 圖3係圖1的鏡頭模組的鏡頭組軸向方向的剖面圖； 圖4係本發明實施例二的鏡頭模組之部分分解結構示 意圖。 I 【主要元件符號說明】 鏡頭組 10 ^ 50 第一、第二套筒 11、12 内螺紋 110 、 120 鏡筒 13 螺紋端 131 、 132 連接部 133 齒輪 20、41、42 轴 21、43 輪齒 134、201、411、421 531 濾光片 31 間隔環 32 鏡片 33、35 影像感測器34 齒輪組 40 第二套筒 53 12Semiconductor, hereinafter referred to as CMOS) image sensing device, the spring is in a compressed state. When the subject is near, to obtain a clear image of the subject on the CMOS image sensing device, the lens and CM need to be adjusted. s The distance between the image sensing devices is such that the imaged point of the object is located at the position of the CM〇s image sensing device, and the screw is rotated counterclockwise in the through hole of the lens holder by a hand or an external tool, and the lens is in the spring A stable and linear movement in the lens holder under the action of elastic force can be judged whether the focus is correct or not by the display screen outside the digital camera, so that the lens module is focused on the correct shooting position. 7 200819904 ν' t The lens module is in the process of focusing, because the distance between the lens and the CMOS image sensing device and the lens is adjusted, so that the total axial length of the lens module will change, so in the lens holder The space that allows the lens to move back and forth must be set to increase the size of the lens module. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a lens module that can maintain the total axial length of the lens module while focusing. ^ A lens module comprising a lens group for imaging and a gear set meshing with the lens group, the lens group comprising a lens barrel for accommodating the optical element and a sleeve sleeved on both ends of the lens barrel a first sleeve and a second sleeve. The positions of the first and second sleeves are fixed. Gear teeth are provided on the outer side wall of the barrel. The inner side wall of the second sleeve and the outer side wall of one end of the lens barrel corresponding to the second sleeve are respectively provided with matching threads. The gear set includes at least one gear that corresponds to the teeth on the outer sidewall of the barrel, and controls movement of the barrel to focus. p The lens module is adjusted by a gear disposed outside the lens group, and the gear is used to achieve focusing, and the positions of the first and second sleeves are fixed, thereby ensuring that the lens module is in the total The axial length remains the same. [Embodiment] In order to further clarify the present invention, the following preferred embodiments are described in detail below with reference to the drawings. Referring to FIG. 1 , FIG. 2 and FIG. 3 , a lens module according to a first embodiment of the present invention includes a lens assembly 10 for imaging and a gear 20 that is engaged with the lens assembly 10 200819904, through which the gear 20 is Rotation can control the lens group 10 to focus. The lens group 1 includes a first sleeve 11, a second sleeve 12, and a barrel 13 for accommodating optical elements. The first sleeve 11 and the second sleeve 12 are respectively sleeved at both ends of the lens barrel 13. The first sleeve 11 is fixed in a lens holder (not shown), and the inner wall of the first sleeve 11 may or may not be provided with an internal thread, and in this example, an internal thread no is provided. At least one * optical element is disposed in the first sleeve 11. In the present embodiment, a filter 31, a spacer ring 32 and a lens 33 are provided. The second sleeve 12 is fixed in a lens holder (not shown). The inner wall of the second sleeve 12 is provided with an internal thread 120 opposite to the helical direction of the internal thread 11 of the first sleeve 11. At least one optical element is disposed in the second sleeve 12. In the present embodiment, an image sensor 34 for sensing an image is provided. ^ The lens barrel 13 includes a first externally threaded end 131 that mates with the first sleeve 11, a second externally threaded end 132 that mates with the second sleeve 12, and a first externally threaded end 131, a second external thread The connecting portion 133 to which the end 132 is connected. Preferably, the first male end 131, the second male end 132 and the connecting portion 133 are formed in a body. At least one optical element is disposed in the lens barrel 13, and a lens 35 is disposed in this embodiment. The first externally threaded end 131 cooperates with the internal thread 11 第一 of the first sleeve 11 , and the axial length of the thread of the first externally threaded end 131 is greater than the axis of the first sleeve 11 To the length. 9 200819904. The second externally threaded end 132 cooperates with the internal thread 120 of the second sleeve 12, and the axial length of the thread of the second externally threaded end 132 is greater than the axial direction of the internal thread 120 of the second sleeve 12. length. The outer side wall of the connecting portion 133 is provided with gear teeth 134. The outer side wall of the gear 20 is provided with gear teeth 201. The gear 20 is rotated, and the teeth 201 of the gear 20 cooperate with the teeth 134 of the connecting portion 133 of the lens barrel 13 to control the lens barrel 13 to move to focus. The gear 20 is sleeved on a shaft 21 which is fixed in a lens mount (Fig. ® not shown). The axial length of the shaft 21 is set according to the needs of the lens mount. Referring to FIG. 4 , the lens module of the second embodiment of the present invention includes a lens group 50 for imaging and a gear set 40 that is combined with the lens group 50 , and the lens can be controlled by the rotation of the gear set 40 . Group 40 performs focusing and fine adjustment. The lens assembly 50 includes a lens barrel 13 as described in the first embodiment, and a first sleeve 11 and a second sleeve 53 that are sleeved on opposite ends of the lens barrel 13, and the outer side wall of the second sleeve 53 Gear teeth 531 are provided. The gear set 40 includes a first gear 41 that mates with a joint 133 of the lens barrel 13 and a second gear 42 that mates with the second sleeve 53. The first gear 41 and the second gear 42 are movably coupled by the same shaft 43 and are freely movable relative to the shaft 43. Preferably, the first gear 41 and the second gear 42 are equal in diameter. The outer side wall of the first gear 41 is provided with gear teeth 411 that cooperate with the teeth 134 of the connecting portion 133 of the lens barrel 13, and the axial length of the first gear 41 is set as needed. For example, the axial length of the first gear 41 is equal to 200819904 » or * is greater than the length of the connecting portion 13 3 . The outer side wall of the second gear 42 is provided with gear teeth 421' which cooperate with the wheel #531 of the second sleeve 53, and the axial length of the second gear 42 is set as needed. For example, the axial length of the second gear 42 is equal to or greater than the length of the second sleeve 53. The modulus of the teeth 411 of the first gear 41 is greater than or equal to the modulus of the teeth 421 of the second gear 42. Lu The shaft 43 is fixed in a lens mount (not shown). The axial length of the shaft 43 is set according to the needs of the lens mount. The first gear 41 can control the connection portion 133 of the lens barrel n to be in focus by its teeth 411. Further, the modulus of the teeth 421 of the second gear 42 is smaller than the modulus of the teeth 411 of the first gear 41, and the second sleeve 53 can be rotated by the teeth 421 of the second gear 42 for fine adjustment. The lens module is provided with a gear 20 and a gear set 4〇, and the gear 20 and the gear set 40 mesh with the lens group 1〇, 5〇• outside the lens group 10, 5〇 and control the lens group 10, 5〇 Focusing, at the same time, the total length of the lens groups 10, 50 remains unchanged, thereby ensuring that the total axial length of the lens group ι, 5 不会 does not change due to focusing. In summary, the present invention complies with the requirements of the invention patent, and proposes a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is limited to the above embodiments, and those skilled in the art will be able to make equivalent modifications or changes according to the spirit of the present invention. All should be covered by the following patent application. 11 is a schematic diagram of a partially exploded structure of a lens module according to a first embodiment of the present invention; FIG. 2 is a schematic exploded view of a lens assembly in the lens module of FIG. 1; 1 is a cross-sectional view of the lens unit in the axial direction of the lens module; FIG. 4 is a partially exploded structural view of the lens module according to the second embodiment of the present invention. I [Description of main component symbols] Lens group 10 ^ 50 First and second sleeves 11, 12 Internal threads 110, 120 Lens barrel 13 Threaded ends 131, 132 Connections 133 Gears 20, 41, 42 Axis 21, 43 Tooth 134, 201, 411, 421 531 Filter 31 Spacer 32 Lens 33, 35 Image sensor 34 Gear set 40 Second sleeve 53 12