100年.11月日按正替換頁 1363203 六、發明說明： 【發明所屬之技術領域】 [〇〇〇1] 本發明係關於一種數位相機變焦鏡頭結構，尤其係關於 一種功耗低、精度高之數位相機變焦鏡頭結構。 【先前技術】 [0002] 數位相機通常為方便取景，一般配有變焦鏡頭，藉由驅 動機構推拉或旋轉鏡頭’調整鏡頭内鏡片之間距，從而 改變焦距，使拍攝之景物放大或縮小。 • [0003] 一習知驅動機構通常採用步進馬達帶動齒輪機構，該種 數位相機變焦鏡頭結構於工作時，步進馬達帶動圓柱齒 輪轉動，同時帶動齒條做直線運動，從而使鏡頭組於套 筒内沿光轴作直線運動’改變鏡頭組與套筒内固定鏡頭 之間相對位置，實現光學變焦，惟，該變焦相機之變焦 鏡頭結構佔有較大之體積，且傳動時，動力損耗大，驅 動速度較慢，光學精度低。 [0004]另一習知驅動機構採用壓電致動器，該壓電致動器藉由 ® 壓電元件之性能’於接通電流後，其表面會發生彎曲， 藉由該彎曲從而帶動數位相機之鏡頭前後移動。該種壓 電致動器體積小，然，該壓電元件不能滿足精確控制之 要求。 【發明内容】 [0005]有鑒於此，有必要提供一種功耗低、且精度高之數位相 機變焦鏡頭結構。 [0006]本發明係關於一種數位相機變焦鏡頭結構，該數位相機 094131037 表單編號A0101 第3頁/共13頁 1003410920-0 1363203 [0007] [0008] [0009] [0010] [1^0年.11月07曰核正 變焦鏡頭結構包括一第一鏡片組，一鏡筒，一致動器及 一鏡座；該鏡筒内設置第二鏡片組，該第一鏡片組與該 第二鏡片組中心對齊；該致動器與該鏡筒固定連接，其 包括一變形記憶合金，該變形記憶合金於溫度控制下驅 動該鏡筒軸向位移發生變化；該第一鏡片組與該鏡座固 定連接，該鏡筒與該鏡座可滑動連接。 相較習知技術’所述致動器採用變形記憶合金，所需功 耗低、控制精度高。另，該致動器僅佔有較小體積，可 有效縮小空間。 $ 【實施方式】 本發明數位相機變焦鏡頭結構應用於數位相機模組内， 请參見第一圖，该數位相機鏡頭模組包括第一鏡筒1〇、 第二鏡筒20、一鏡座30、一致動器4〇、一透光板5〇、一 影像感測器60及一基座7(N s玄第-鏡筒ίο為中空圓筒狀，其内設置有第一鏡片組12 ’其外®胃設1_紋1〇2。第—鏡筒1() 一端設有蓋板14 ’該蓋板14為_平板_ ’即可使光線通過，亦可阻擋 9 灰塵等雜質進入而污染第一鏡片組12。 該第二鏡筒20亦為中空圓筒狀，其内設置有第二鏡片組 22，該第二鏡筒2G位;^第—鏡筒10—側，且二鏡筒中心 對齊》 鏡座30為中空圓台狀’該鏡座30包括-容置部3〇2及-凸 緣部304 »該容置部3〇2為t空圓柱體，該凸緣部3〇4為 -立方體’-端為矩形開槽3〇6，其與容置部3〇2相貫通 094131037 表單编號A0101 第4頁/共13頁 1003410920-0 [0011] 1363203 I ·· 100年.11月07日梭正替#頁 。容置部302之外徑小於凸緣部304之邊長，而於兩者相 接處形成台階’而鏡座30之凸緣部304之矩形開槽306邊 長大於容置部302之内徑。鏡座30之容置部302内圓週與 凸緣部304相對端設置有内螺紋308，其與第一鏡筒10之 外螺紋102相配合。該第二鏡筒20位於第一鏡筒10之下且 滑動配合於容置部302 » [0012] 致動器40包括絕緣層及包覆於絕緣層内之形狀記憶合金 (Shape Memory Alloy)。該致動器40位於第二鏡筒20 之下且一端與第二鏡筒20固定連接，另一端固定於透光 板50上。該致動器40分別由溫度控制設備來控制其溫度 ’本實施方式係藉由電源42供電加熱來改變溫度。本發 明優選實施方式採用多個致動器4〇，每個致動器40之間 疊加排列’且與電源42並聯連接，從而每個致動器40可 作為獨立控制單元。 [0013]該形狀記憶合金係一種具有記憶原來形狀機能之材料， 其^·/狀s己憶之機制與材料本身之相變化（phase trans-# formation)有關。請參見第二圖，該變形記憶合金於常 溫下，其晶格為馬氏體狀態，藉由電源供電加熱至一定 溫度時’變形記憶合金於固體狀態下内部分子結構重 新排列，其晶格轉變為奥氏體咚態。停止通電，變形記 憶合金會快速冷卻，使其晶格又恢復為馬氏體狀態。變 形。己隐合金於奥氏體狀態轉換為馬氏體狀態時，其將產 生變形應力’該變形應力使該變形記憶合金軸向高度發 生變化，利用該軸向高度變化可帶動第二鏡筒20上下移 動，從而改變第二鏡筒20與第一鏡筒1〇之間距，實現變 094131037 表單編號Α0101 第5頁/共13頁 1003410920-0 1363203 100年11月07日按正替換頁] 焦功能。多個致動器40控制變焦時，可藉由開關控制接 通電源42之致動器40數量，從而實現控制變焦間距。為 保持每一致動器40相互獨立性，致動器40之間可設置絕 熱層’從而防止熱量相互影響。另，為有效保證斷電情 況下，使致動器40於停止通電情況下快速降溫，可於致 動器外面加設散熱片，從而保證致動器40於斷電情況下 ’可藉由散熱片快速將熱量散發，從而使變形記憶合金 恢復原始狀態。另，於加熱時，該散熱片亦可防止熱量 對鏡筒内之鏡片產生影響。 [〇〇14] 該種致動器40之變形記憶合金之材質可為銅鋁鐵 (CuAlFe) ’ 銅鋁鎳（CuAINi)，鎳鈇（NiTi)，銅鎳鈦 (CuNiTi)，銅鎳鈦（CuNiTi)，銅鍅鋅（CuZrZn)，銅鋁 鋅（CuAlZn)，銅鋁鐵鋅（CuAlFeZn)，鎳鈦鋁銅 (NiTiAlCu)，鎳鈦鋁鋅（NiTiALZn)及鎳鈦鋁鋅銅 (NiTiAIZnCu)等任一種。該種合金具有較好之形狀記憶 效應，控制精度較高，且該變形記憶合金所需功耗較低 ’滿足低耗之要求。 [0015] 透光板50蓋於影像感測元件60上，以保護影像感測元件 60 ’避免灰塵水汽污染該影像感測元件60 ^該透光板50 係一透光玻璃，其了表面可鑛覆一層紅外截止濾膜 (IR-cut Coating) ’以濾除來自於被攝物反射之光線 中之紅外線，從而提高成像品質。 [0016] 該影像感測元件60通常可為電荷耦合器（Charge Coupled Device，下稱CCD)，或者補充性氧化金屬半 導體（Complementary Metal-Oxide Semiconductor 094131037 表單编號A0101 第6頁/共13頁 1003410920-0 1363203 100年.11月07日梭正替換頁 ，下稱CMOS)。該影像感測元件60固定於基座70内，其 用以將影像之光訊號轉變為電訊號。 [0017] 該基座70為一長方型腔體，用以容置影像感測元件60。 [0018] 組裝時，先將影像感測元件60固定於基座70内，再將透 光板50蓋覆於基座70之上，以保護影像感測元件60。第 二鏡筒20固定於致動器40之上，再將致動器40固定於透 光板50上。之後，將第一鏡筒10藉由其外螺紋102與鏡座 30之内螺紋308之配合而螺紋連接於鏡座30上，再將組裝 有第一鏡筒10之鏡座30固定於基座70上，之後以黏膠或 熱熔接等方式將鏡座30與基座70連接在一起；之後，進 行調焦，通過調整第一鏡筒10之外螺紋102與鏡座30之内 螺紋308之'連接，以微調第一鏡筒10與影像感測元件60之 間距使所述數位相機模組處於一最佳影像攝取狀態，最 後通過點膠將第一鏡筒10固定於鏡座30上，致動器40與 電源42連接，以提供熱能給致動器40，至此，該數位相 機模組組裝完畢。100 years. November, the day is replaced by the page 1363203. 6. Description of the invention: [Technical field of the invention] [1] The present invention relates to a digital camera zoom lens structure, in particular to a low power consumption and high precision Digital camera zoom lens structure. [Prior Art] [0002] Digital cameras are usually equipped with a zoom lens. The zoom lens is usually used to push or pull or rotate the lens to adjust the distance between the lenses in the lens to change the focal length and enlarge or reduce the subject. • [0003] A conventional drive mechanism usually uses a stepping motor to drive the gear mechanism. When the digital camera zoom lens is in operation, the stepping motor drives the spur gear to rotate, and at the same time drives the rack to make a linear motion, so that the lens group is The linear movement of the sleeve along the optical axis 'changes the relative position between the lens group and the fixed lens inside the sleeve to achieve optical zoom. However, the zoom lens structure of the zoom camera occupies a large volume, and the power loss is large during transmission. The drive speed is slow and the optical precision is low. [0004] Another conventional driving mechanism employs a piezoelectric actuator which, by virtue of the performance of the piezoelectric element, bends its surface after the current is turned on, thereby driving the digital position by the bending. The camera's lens moves back and forth. The piezoelectric actuator is small in size, and the piezoelectric element cannot satisfy the requirements of precise control. SUMMARY OF THE INVENTION [0005] In view of the above, it is necessary to provide a digital camera zoom lens structure with low power consumption and high precision. The present invention relates to a digital camera zoom lens structure, the digital camera 094131037, form number A0101, page 3 / total 13 pages 1003410920-0 1363203 [0007] [0008] [0009] [0010] [1^0 years. The November 07曰 nuclear zoom lens structure comprises a first lens group, a lens barrel, an actuator and a lens holder; a second lens group is disposed in the lens barrel, the first lens group and the second lens group center Aligning; the actuator is fixedly coupled to the lens barrel, and includes a deformation memory alloy, wherein the deformation memory alloy drives the lens barrel to change axial displacement under temperature control; the first lens group is fixedly connected to the lens holder, The lens barrel is slidably coupled to the lens holder. Compared with the prior art, the actuator employs a deformation memory alloy, which requires low power consumption and high control precision. In addition, the actuator occupies only a small volume, which can effectively reduce the space. The first embodiment of the digital camera lens module includes a first lens barrel 1 , a second lens barrel 20 , an actuator 4 , a light-transmissive plate 5 , an image sensor 60 and a pedestal 7 (N s 玄 ─ ─ 镜 镜 为 中空 中空 中空 镜 镜 镜 镜 镜 镜 镜 镜 镜 镜 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一The outer side of the stomach is set to 1_1〇2. The first barrel 1() is provided with a cover 14 at one end. The cover 14 is _ flat_' to allow light to pass through, and can block impurities such as dust from entering. The second lens barrel 20 is also hollow cylindrical, and is provided with a second lens group 22, the second lens barrel 2G position; The center of the barrel is aligned. The mirror holder 30 is in the form of a hollow truncated cone. The mirror holder 30 includes a receiving portion 3〇2 and a flange portion 304. The receiving portion 3〇2 is a t-shaped cylinder. The flange portion 3 is a hollow cylinder. 〇4 is a - cube '- end is a rectangular slot 3〇6, which is connected to the accommodating part 3〇2 094131037 Form No. A0101 Page 4 / Total 13 Page 1003410920-0 [0011] 1363203 I ·· 100 years .11月07日梭正替# The outer diameter of the accommodating portion 302 is smaller than the side length of the flange portion 304, and a step is formed at the intersection of the two, and the rectangular groove 306 of the flange portion 304 of the lens holder 30 is longer than the accommodating portion 302. The inner circumference of the receiving portion 302 of the lens holder 30 and the opposite end of the flange portion 304 are provided with internal threads 308 which cooperate with the external thread 102 of the first barrel 10. The second barrel 20 is located in the first barrel 10 below and slidingly fitted to the receiving portion 302 » [0012] The actuator 40 includes an insulating layer and a shape memory alloy coated in the insulating layer. The actuator 40 is located in the second barrel 20 The lower end is fixedly connected to the second barrel 20, and the other end is fixed to the light-transmitting plate 50. The actuator 40 is controlled by a temperature control device, respectively. The present embodiment is changed by power supply 42 to supply heat. The preferred embodiment of the invention employs a plurality of actuators 4〇, each of which is superimposed between 'and is connected in parallel with the power source 42 such that each actuator 40 can function as an independent control unit. [0013] The shape memory alloy is a material having the function of remembering the original shape, and its shape is The mechanism is related to the phase trans-# formation of the material itself. Please refer to the second figure. The deformed memory alloy has a lattice in the martensite state at normal temperature and is heated by a power supply to a certain temperature. The internal memory structure of the deformed memory alloy is rearranged in a solid state, and its lattice is transformed into an austenitic state. When the energization is stopped, the deformed memory alloy will rapidly cool and return its lattice to a martensite state. When the austenitic alloy is transformed into the martensite state, the deformation stress is generated. The deformation stress causes the axial height of the deformation memory alloy to change, and the axial height change can drive the second lens barrel 20 up and down. Move, thereby changing the distance between the second barrel 20 and the first barrel 1 , realizing the change 094131037 Form No. Α 0101 Page 5 / Total 13 Page 1003410920-0 1363203 November 07, 100 Press the replacement page] Focus function. When the plurality of actuators 40 control the zoom, the number of actuators 40 that are turned on by the power source 42 can be controlled by the switches, thereby achieving control of the zoom pitch. In order to keep each of the actuators 40 independent of each other, a heat insulating layer ' may be disposed between the actuators 40 to prevent heat from affecting each other. In addition, in order to effectively ensure that the actuator 40 is quickly cooled down when the power is turned off, a heat sink can be added outside the actuator to ensure that the actuator 40 can be dissipated by heat. The sheet quickly dissipates heat, returning the deformed memory alloy to its original state. In addition, the heat sink prevents heat from affecting the lens in the lens barrel when heated. [〇〇14] The material of the deformed memory alloy of the actuator 40 may be copper aluminum iron (CuAlFe) 'copper aluminum nickel (CuAINi), nickel niobium (NiTi), copper nickel titanium (CuNiTi), copper nickel titanium ( CuNiTi), copper bismuth zinc (CuZrZn), copper aluminum zinc (CuAlZn), copper aluminum iron zinc (CuAlFeZn), nickel titanium aluminum copper (NiTiAlCu), nickel titanium aluminum zinc (NiTiALZn) and nickel titanium aluminum zinc copper (NiTiAIZnCu), etc. Any one. The alloy has a good shape memory effect, high control precision, and the deformation memory alloy requires low power consumption to meet the requirements of low consumption. [0015] The light transmissive plate 50 covers the image sensing component 60 to protect the image sensing component 60' from dust and water vapor to contaminate the image sensing component 60. The light transmissive plate 50 is a light transmissive glass, and the surface thereof can be The mine is covered with an IR-cut Coating to filter out the infrared rays from the light reflected from the object, thereby improving the image quality. [0016] The image sensing element 60 can be a Charge Coupled Device (hereinafter referred to as CCD) or a complementary metal oxide semiconductor (Complementary Metal-Oxide Semiconductor 094131037 Form No. A0101 Page 6 of 13 page 1003410920) -0 1363203 100 years. On November 07, the shuttle is replacing the page, hereinafter referred to as CMOS). The image sensing component 60 is fixed in the base 70 for converting the optical signal of the image into an electrical signal. [0017] The pedestal 70 is a rectangular cavity for accommodating the image sensing component 60. [0018] During assembly, the image sensing element 60 is first fixed in the susceptor 70, and the light permeable plate 50 is overlaid on the pedestal 70 to protect the image sensing element 60. The second barrel 20 is fixed to the actuator 40, and the actuator 40 is fixed to the light transmitting plate 50. Thereafter, the first lens barrel 10 is screwed to the lens holder 30 by the cooperation of the external thread 102 and the internal thread 308 of the lens holder 30, and the lens holder 30 assembled with the first lens barrel 10 is fixed to the base. 70, after the lens holder 30 and the base 70 are connected together by means of adhesive or heat welding; afterwards, focusing is performed by adjusting the external thread 102 of the first barrel 10 and the internal thread 308 of the lens holder 30. 'Connecting to finely adjust the distance between the first lens barrel 10 and the image sensing element 60 to bring the digital camera module into an optimal image capturing state, and finally fixing the first lens barrel 10 to the lens holder 30 by dispensing. The actuator 40 is coupled to a power source 42 to provide thermal energy to the actuator 40. Thus, the digital camera module is assembled.
[0019] 工作時，致動器40接通電源，該致動器40内部之變形記 憶合金於加熱狀態下，晶格發生變化，從而軸向高度發 生變化，進而帶動第二鏡筒20轴向變化，從而實現數位 相機變焦。關掉電源後，該致動器40又恢復到原來形狀 [0020] 可以理解，該致動器40亦可應用於數位相機對焦結構中 .，從而改變鏡頭與影像感測器60之間距離。 [0021] 可以理解，該致動器40數量可為單個。 094131037 表單編號A0101 第7頁/共13頁 1003410920-0 1363203 100年11.月07日按正替換頁 [0022] 可以理解，該致動器40之變形記憶合金亦為塊狀或片狀 〇 [0023] 可以理解，該致動器40之變形記憶合金亦可為薄膜狀， 其可成型於基材上，該基板材質可為玻璃、Si、Cu或其 他有光澤之金屬上，再將Ti，Ni，A1等金屬藉由直流磁 控滅射技術（DC Magnetron sputtering)，射頻磁控 藏鑛技術（RF Magnetron sputtering)或高頻二級管 滅鐘技術（RF diode sputtering)成型於基材上，從而 形成包含有變形記憶合金之致動器40〇 | [0024] 可以理解，該致動器40之位置可位於其他位置，並不限 於第二鏡筒20之下，例如’其可為第二鏡筒2〇兩側，而 使該致動器40'提供第二鏡筒20軸向位移。 [0025] 综上所述，本發明符合發明專利要件，妥依法提出專利 申請》惟’以上所述者僅為本發明之較佳實施例，本發 明之範圍並不以上述實施例為限，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飾或變化，皆應涵 | 蓋於以下申請專利範圍内。 【圖式簡單說明】 [0026] 第一圖係本發明優選實施方式數位相機鏡頭變焦結構示 意圖； [0027] 第二圖係本發明優選實施方式形狀記憶合金之晶格變化 示意圖。 【主要元件符號說明】 [0028] 數位相機變焦鏡頭結構：100 094131037 表單编號A0101 第8頁/共13頁 1003410920-0 1363203 100年.11月07日按正替換頁 [0029] 第一鏡筒：10 [0030] 第一鏡片組：12 [0031] 外螺紋：10 2 [0032] 蓋板：14 [0033] 第二鏡筒：20 [0034] 第二鏡片組：22 [0035] 鏡座：30 • [0036] 容置部：3 0 2 [0037] 凸緣部：304 [0038] 矩形開槽：306 .[0039] 内螺紋：308 [0040] 致動器：40 [0041] • 影像感測器：50 [0042] 基座：60 [0043] 電源：42 094131037 表單编號A0101 第9頁/共13頁 1003410920-0[0019] During operation, the actuator 40 is powered on, and the deformed memory alloy inside the actuator 40 is heated, the crystal lattice changes, and the axial height changes, thereby driving the second lens barrel 20 axially. Change to achieve digital camera zoom. After the power is turned off, the actuator 40 returns to its original shape. [0020] It will be understood that the actuator 40 can also be applied to a digital camera focusing structure to change the distance between the lens and the image sensor 60. [0021] It will be appreciated that the number of actuators 40 can be a single unit. 094131037 Form No. A0101 Page 7 of 13 1003410920-0 1363203 100 years 11.11.07 Pressing the replacement page [0022] It can be understood that the deformation memory alloy of the actuator 40 is also a block or sheet 〇 [ 0023] It can be understood that the deformed memory alloy of the actuator 40 can also be in the form of a film, which can be formed on a substrate, which can be made of glass, Si, Cu or other shiny metal, and then Ti, Ni, A1 and other metals are formed on the substrate by DC Magnetron sputtering, RF Magnetron sputtering or RF diode sputtering. Thereby forming an actuator 40 包含 containing a deformation memory alloy [0024] It can be understood that the position of the actuator 40 can be located at other positions, not limited to the second lens barrel 20, for example, 'it can be second The lens barrel 2 has two sides, and the actuator 40' provides axial displacement of the second barrel 20. [0025] In summary, the present invention meets the requirements of the invention patent, and the patent application is filed according to the law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are covered by the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0026] The first drawing is a schematic view of a zoom lens structure of a preferred embodiment of the present invention; [0027] The second drawing is a schematic diagram of a lattice change of a shape memory alloy according to a preferred embodiment of the present invention. [Description of main component symbols] [0028] Digital camera zoom lens structure: 100 094131037 Form No. A0101 Page 8 / Total 13 pages 1003410920-0 1363203 100 years. November 07 Press positive replacement page [0029] First lens barrel : 10 [0030] First lens group: 12 [0031] External thread: 10 2 [0032] Cover: 14 [0033] Second barrel: 20 [0034] Second lens group: 22 [0035] Mirror holder: 30 • [0036] accommodating part: 3 0 2 [0037] Flange part: 304 [0038] Rectangular slotting: 306. [0039] Internal thread: 308 [0040] Actuator: 40 [0041] • Image sense Detector: 50 [0042] Base: 60 [0043] Power: 42 094131037 Form No. A0101 Page 9 / Total 13 Page 1003410920-0