200813598 九、發明說明： 【發明所屬之技術領域】 ^本發明涉及-種微型馬達，尤其涉及一種可應用於鏡 頭模組變焦調節之線性微型馬達。 【先前技術】 隨著多媒體技術之發展，數位相機已被人們廣泛應 用，同時近年來便攜式電子裝置向高性能、多功能化讀 鲁之快速發展，使得數位相機與便攜式電子裝置之結合成為 移動多媒體技術之發展趨勢。目前，具有數位攝^能ς 電子裝置，其主要藉由結合於電子裝置中之鏡頭模組來實 現影像記錄之目的。 通常，鏡頭模組藉由凸輪結構將驅動馬達之旋轉運動 轉換成直線運動，以帶動鏡頭模組之光學元件沿光轴方向 ^動’從而調節鏡頭模組之焦距。然而，應用於鏡頭模組 •中之凸輪’其結構複雜且包含較多元件，不利於鏡頭模組 之小型化發展，導致鏡頭模組於便攜式電子裝置中之應用 受到限制。 么、=鑒於此，有必要提供一種微型馬達以用於對鏡頭模 、’=行變焦調節，且其具有結構簡單、緊湊之優點。 【發明内容】 以下將以實施例說明—種微型馬達，其可用於對鏡頭 吴、、且，于變焦調節且具有結構簡單、緊凑之優點。 種微型馬達，其包括激勵機構及傳動機構，所述激 200813598 勵機構包括腔體，收容於腔體内之互不混溶之導電水 =、!電油性溶液’以及電極，該導電水性溶液與非導 、'’合液之間形成有一分界面，該電極用於產生電場， 以作用於導電水性溶液，使鱗電水性溶 膜及傳動件，職膜設置於腔體时界面處並可隨分界面 發生n變化’其包括親水表面及與該親水錶面相對之疏 水表面’該親水表面位於分界面之導電水性溶液一侧，該 疏水表面位於分界面之非導電油性溶液—侧，該傳動件盘 所述親水表面及疏水表面中之任—者相連接，其可於薄膜 之傳動作用下沿自身軸線方向作線性運動。 、相較於先前技術，所述微型馬達藉由薄膜與傳動件形 成傳動機構，並藉由向激勵機構之電極施加電壓產生電 昜卩使激勵機構之分界面形狀改變，進而使所述傳動件 於薄膜之傳動作用下沿自身軸線方向作線性運動。應用於 籲鏡頭模、、且中蚪，該微型馬達無需凸輪之轉換作用即可沿軸 向作線性運動，其具有結構簡單、緊凑之優點。 【實施方式】 下面結合附圖對本發明作進一步詳細說明。 參見圖1 ’本發明實施例提供之微型馬達10包括激勵 機構12及傳動機構14。 所述激勵機構12包括腔體11，導電水性溶液122,非 導電油性溶液123,第一電極124,第二電極ι25及疏水絕 緣層126。 7 200813598 所述腔體11由圓柱管120及基座121構成。所述圓柱 •管120包括末端1200及與該末端1200相對之開口端（圖未 “標示），所述末端1200設有開口 1202。所述基座121設置 於圓柱管120之開口端，並將圓柱管12〇之開口端封閉。 該圓柱管120之材質可為破璃、陶瓷等，其内徑可等於或 小於2鼋米。該基座121之材質可與圓柱管12〇之材質相 同。 I 所述導電水性溶液122與非導電油性溶液123不相混 岭該‘電水性溶液122與非導電油性溶液ι23收容於腔 體I1内，並分別位於圓柱管120内之開口端一侧及末端一 側，一者之交界處形成一分界面127。所述導電水性溶液 可為鹽水溶液。所述非導電油性溶液123可為矽酮油 =鍵^。優選的，該導電水性溶液122及非導電油性溶液 123具有相等或相近之密度，從而可使得該激勵機構比於 實際應用過程中可避免受到重力效應之影響。 1 所述第一電極124可為設置於圓柱管120内侧壁上之 圓筒形電極，其材質可為金屬。當然，該第一電極124也 可為开y成於圓柱管12〇内匈壁上之導電塗層。 所述第二電極125可為設置於圓柱管12〇開口端與基 座121之間之環形電極。讀帛二電極125之至少一部分位 於腔體11内，從而可與收容於腔體11内之導電水性溶液 122相接觸。該第二電極125之材質可與第一電極相同。 斤迷心水絕緣層126形成於第一電極之遠離腔體 U内側壁之一側，其將第—電極124與腔體U内之導電 200813598 水性溶液122及非導電油性溶液123隔開。該疏水絕緣層 _ 126之材質可為聚對二曱苯。 如圖2所示，所述傳動機構14包括薄膜140及傳動件 142 ° 所述薄膜140設置於導電水性溶液122與非導電油性 溶液123之分界面127處，且該薄膜140之形狀與分界面 127之形狀相配合，並可隨分界面127之形狀變化而改變。 該薄膜140之鄰近導電水性溶液122之一侧為親水表面 ® 1402，該薄膜140之鄰近非導電油性溶液123之一侧為疏 水表面1404。所述親水表面1402與疏水表面1404相對設 置，二者可為分別形成於薄膜140兩侧面上之親水層及疏 水層。所述親水層之材質可為尼龍或聚醚颯等，所述疏水 .層之材質可為四氟乙烯、聚碳酸酯或聚對二曱苯等。優選 的，該薄膜140為柔性薄膜，其材質可為塑膠。 所述傳動件142可為圓柱體或棱柱體等，其一端固定 善於薄膜140之疏水表面1404 —侧，另一端穿過圓柱管120 之開口 1202、並延伸出至圓柱管120之外部。該傳動件142 之材質可為塑膠。該傳動件142可藉由膠合之方式與薄膜 140相連，也可與薄膜140 —體成型。 下面將具體描述該微型馬達10之工作過程： (a)圖1所示為微型馬達10之第一狀態，微型馬達10 之第一電極124與第二電極125之間未施加電壓。由於導 電性導電水性溶液122於疏水絕緣層126之疏水作用下具 有較為緊縮之形狀，該導電水性溶液122與疏水絕緣層126 200813598 之間具有相對較小之接觸面及大於90度之接觸角θχ。分 界面127向非導電油性溶液123 —侧凸起，從而可藉由薄 膜140驅動傳動件142沿其軸線向圓柱管120之外部運動。 (b)圖2所示為微型馬達10之第二狀態，藉由電壓源 20向微型馬達10之第一電極124及第二電極125之間提 供一電壓。導電水性溶液122受到第一電極124與第二電 極125之間電場之作用後產生電潤濕現象，其可克服疏水 絕緣層126之疏水作用而具有較為擴張之形狀，該導電水 _ 性溶液122與疏水絕緣層126之間具有較大之接觸面及小 於9Ό度之接觸角θ2。此刻，分界面127向導電水性溶液 122 —侧凸起，從而可藉由薄膜140驅動傳動件142沿其 軸線向圓柱管120之内部運動。 當給第一電極124及第二電極125提供脈衝電壓時， 該微型馬達10將交替地處於第一與第二狀態，從而使傳動 件142沿其自身之軸線方向交替地向外突伸、向内收縮。 φ 需要說明的是，所述激勵機構12之第一電極124並不 局限於設於圓柱管120之内側壁上，只要保證施加電壓 後，第一電極124與第二電極125之間產生之電場可作用 於導電水性溶液122以產生電潤濕現象即可。例如，如圖 3所示，該第一電極124也可以設置於圓柱管120之外侧 壁上，相應的，可直接於圓柱管120之内侧壁上形成疏水 緣層126。 所述微型馬達10,其藉由薄膜140與傳動件142形成 傳動機構14，並藉由向激勵機構12之電極124、125施加 200813598 ==?使激勵機構12之分界面127形狀改變， t而使所述傳動件142於薄膜⑽之傳動作用下沿自身輪 ::向：線性運動。應用於鏡頭模組中時，該微型馬達10 =上^述’本發㈣合發明翻要件，爰依法提 幸：：上所述者僅為本發明之較佳實施例，舉凡 斤飾人士’缺依本案發明之精神所作之等效 2飾或交化’皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 圖1係本發明實施例所提供之微型馬達之結構示意 圖。 圖2係圖1所不之微型馬達施加電壓後之狀態示意圖。 圖3係本發明另—#施觸提供之微型馬達之結構示 r\ 腔體 11 圓柱管 120 開口 1202 導電水性溶液 122 第一電極 124 疏水絕緣層 126 傳動機構 14 親水表面 1402 圖 _【主要元件符號說明】 微型馬達 10 激勵機構 12 末端 1200 基座 121 非導電油性溶液123 第二電極 125 分界面 127 薄膜 140 200813598 142 疏水表面 1404 傳動件 電壓源 20200813598 IX. Description of the Invention: [Technical Field] The present invention relates to a micromotor, and more particularly to a linear micromotor that can be applied to zoom adjustment of a lens module. [Prior Art] With the development of multimedia technology, digital cameras have been widely used, and in recent years, the rapid development of portable electronic devices to high-performance, multi-functional reading has made digital cameras and portable electronic devices become mobile multimedia. Trends in technology development. At present, there is a digital camera capable electronic device, which is mainly used for image recording by a lens module incorporated in an electronic device. Generally, the lens module converts the rotational motion of the driving motor into a linear motion by a cam structure to drive the optical component of the lens module to move along the optical axis direction to adjust the focal length of the lens module. However, the cam applied to the lens module has a complicated structure and contains many components, which is disadvantageous for the miniaturization of the lens module, and the application of the lens module in the portable electronic device is limited. In view of this, it is necessary to provide a micro motor for the lens mode, '= line zoom adjustment, and it has the advantages of simple structure and compactness. SUMMARY OF THE INVENTION Hereinafter, a micro motor will be described by way of example, which can be used for the lens, and is adjustable in zoom and has the advantages of simple structure and compactness. The micro motor includes an excitation mechanism and a transmission mechanism, and the excitation mechanism of the 200813598 includes a cavity, an immiscible conductive water contained in the cavity, an electric oil solution, and an electrode, and the conductive aqueous solution and There is a sub-interface formed between the non-conductive and ''liquid mixture, the electrode is used to generate an electric field to act on the conductive aqueous solution, so that the scale water-based aqueous film and the transmission member are disposed at the interface of the cavity and can be The interface changes n, which includes a hydrophilic surface and a hydrophobic surface opposite the hydrophilic surface. The hydrophilic surface is located on the side of the conductive aqueous solution of the interface, and the hydrophobic surface is located on the side of the non-conductive oily solution of the interface. The hydrophilic surface and the hydrophobic surface of the disk are connected, which can linearly move along the axis of the film under the transmission of the film. Compared with the prior art, the micro motor forms a transmission mechanism by the film and the transmission member, and generates electric power by applying a voltage to the electrodes of the excitation mechanism to change the shape of the interface of the excitation mechanism, thereby making the transmission member Linear movement along the axis of the film under the action of the film. It is applied to the lens module, and the middle motor. The micro motor can move linearly along the axis without the conversion of the cam. It has the advantages of simple structure and compactness. [Embodiment] The present invention will be further described in detail below with reference to the accompanying drawings. Referring to Fig. 1, a micromotor 10 according to an embodiment of the present invention includes an energizing mechanism 12 and a transmission mechanism 14. The excitation mechanism 12 includes a cavity 11, a conductive aqueous solution 122, a non-conductive oily solution 123, a first electrode 124, a second electrode ι25, and a hydrophobic insulating layer 126. 7 200813598 The cavity 11 is composed of a cylindrical tube 120 and a base 121. The cylinder tube 120 includes an end 1200 and an open end opposite the end 1200 (not labeled), the end 1200 is provided with an opening 1202. The base 121 is disposed at the open end of the cylindrical tube 120 and The open end of the cylindrical tube 12 is closed. The material of the cylindrical tube 120 may be glass, ceramic, etc., and the inner diameter thereof may be equal to or less than 2 mm. The material of the base 121 may be the same as that of the cylindrical tube 12 . The conductive aqueous solution 122 and the non-conductive oily solution 123 are not mixed. The 'electro-aqueous solution 122 and the non-conductive oily solution ι23 are accommodated in the cavity I1 and are respectively located at the open end and the end of the cylindrical tube 120. One side, one of the junctions forms a boundary interface 127. The conductive aqueous solution may be a saline solution. The non-conductive oily solution 123 may be an anthrone oil = a key. Preferably, the conductive aqueous solution 122 and non- The conductive oily solution 123 has equal or similar density, so that the excitation mechanism can be prevented from being affected by the gravity effect in the actual application process. 1 The first electrode 124 can be a circle disposed on the inner side wall of the cylindrical tube 120. The electrode may be made of a metal. Of course, the first electrode 124 may also be a conductive coating formed on the Hungarian wall of the cylindrical tube 12. The second electrode 125 may be disposed on the cylindrical tube 12〇. The annular electrode between the open end and the base 121. At least a portion of the read electrode 125 is located in the cavity 11 so as to be in contact with the conductive aqueous solution 122 contained in the cavity 11. The material of the second electrode 125 The same as the first electrode. The cryptic water insulating layer 126 is formed on one side of the first electrode away from the inner side wall of the cavity U, and the conductive electrode 200813598 aqueous solution 122 and the non-conductive oily property in the first electrode 124 and the cavity U are The material of the hydrophobic insulating layer _ 126 may be poly-p-nonylbenzene. As shown in FIG. 2, the transmission mechanism 14 includes a film 140 and a transmission member 142 °. The film 140 is disposed on the conductive aqueous solution 122. At a boundary 127 with the non-conductive oily solution 123, the shape of the film 140 matches the shape of the interface 127 and may change as the shape of the interface 127 changes. One of the adjacent conductive aqueous solutions 122 of the film 140 Side hydrophilic surface ® 140 2, one side of the film 140 adjacent to the non-conductive oily solution 123 is a hydrophobic surface 1404. The hydrophilic surface 1402 is disposed opposite to the hydrophobic surface 1404, and the two may be a hydrophilic layer and a hydrophobic layer respectively formed on both sides of the film 140. The material of the hydrophilic layer may be nylon or polyether ruthenium or the like, and the material of the hydrophobic layer may be tetrafluoroethylene, polycarbonate or poly(p-nonylbenzene), etc. Preferably, the film 140 is a flexible film. The material of the transmission member 142 may be a cylinder or a prism, etc., one end of which is fixed to the side of the hydrophobic surface 1404 of the film 140, and the other end passes through the opening 1202 of the cylindrical tube 120 and extends out to the cylindrical tube. Outside of 120. The material of the transmission member 142 can be plastic. The transmission member 142 may be coupled to the film 140 by gluing or may be integrally formed with the film 140. The operation of the micromotor 10 will be specifically described below: (a) Fig. 1 shows a first state of the micromotor 10, and no voltage is applied between the first electrode 124 and the second electrode 125 of the micromotor 10. Since the conductive conductive aqueous solution 122 has a relatively tight shape under the hydrophobic action of the hydrophobic insulating layer 126, the conductive aqueous solution 122 and the hydrophobic insulating layer 126 200813598 have a relatively small contact surface and a contact angle θ greater than 90 degrees. . The interface 127 is laterally convex toward the non-conductive oily solution 123 so that the transmission member 142 can be driven by the film 140 to move outside the cylindrical tube 120 along its axis. (b) Fig. 2 shows a second state of the micromotor 10, which supplies a voltage between the first electrode 124 and the second electrode 125 of the micromotor 10 by the voltage source 20. The conductive aqueous solution 122 is subjected to an electric field between the first electrode 124 and the second electrode 125 to generate an electrowetting phenomenon, which can overcome the hydrophobic action of the hydrophobic insulating layer 126 to have a more expanded shape. The conductive water solution 122 There is a large contact surface with the hydrophobic insulating layer 126 and a contact angle θ2 of less than 9 degrees. At this point, the interface 127 is convex toward the side of the conductive aqueous solution 122 so that the transmission member 142 can be driven by the film 140 to move toward the inside of the cylindrical tube 120 along its axis. When the first electrode 124 and the second electrode 125 are supplied with a pulse voltage, the micromotor 10 will be alternately in the first and second states, thereby causing the transmission member 142 to alternately protrude outwardly in the direction of its own axis. Internal contraction. φ It should be noted that the first electrode 124 of the excitation mechanism 12 is not limited to be disposed on the inner sidewall of the cylindrical tube 120, as long as the electric field generated between the first electrode 124 and the second electrode 125 is ensured after the voltage is applied. It can act on the conductive aqueous solution 122 to produce an electrowetting phenomenon. For example, as shown in FIG. 3, the first electrode 124 may also be disposed on the outer side wall of the cylindrical tube 120, and correspondingly, the hydrophobic edge layer 126 may be formed directly on the inner side wall of the cylindrical tube 120. The micromotor 10 forms a transmission mechanism 14 by the film 140 and the transmission member 142, and changes the shape of the interface 127 of the excitation mechanism 12 by applying 200813598 == to the electrodes 124, 125 of the excitation mechanism 12, The transmission member 142 is moved linearly along its own wheel under the transmission of the film (10). When applied to a lens module, the micromotor 10 = the above-mentioned 'fourth invention' and the invention's reversal element, and according to the law, the above is only a preferred embodiment of the present invention. Equivalent 2 or cross-overs made in the spirit of the invention of the present invention should be included in the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a micromotor provided by an embodiment of the present invention. Fig. 2 is a schematic view showing the state after the voltage is applied to the micromotor of Fig. 1. 3 is a structure of the micro motor provided by the present invention. r\ cavity 11 cylindrical tube 120 opening 1202 conductive aqueous solution 122 first electrode 124 hydrophobic insulating layer 126 transmission mechanism 14 hydrophilic surface 1402 Figure _ [main components DESCRIPTION OF SYMBOLS] Micromotor 10 Excitation mechanism 12 End 1200 Base 121 Non-conductive oily solution 123 Second electrode 125 Interface 127 Film 140 200813598 142 Hydrophobic surface 1404 Transmission voltage source 20
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