200825451 九、發明說明： • 【發明所屬之技術領域】 • 本發明係關於一種調焦機構，尤其是一種可用於對數位顯微鏡進行精確焦 距調節之調焦機構。 【先前技術】 在微生物學實驗中’必不可少的工具就是顯微鏡，用以觀察微生物的形 ， 態，大小等。顯微鏡的種類彳艮多，有普通的光學顯微鏡（包括單筒的和雙筒的）， 還有較高級的相差顯微鏡、熒光顯微鏡、暗視野顯微鏡，以及高級的電子顯微 鏡(有透射的和掃描的)和原子力顯微鏡。 顯微鏡由機械裝置和光學系統兩大部分組成。機械裝置主要作用是使整個 光學系統固定在一個光轴直線上，而且可精確地調節各光學部件之間的距離， 使顯微鏡能産生清晰的物像。其組成一般包括··鏡座和鏡臂、鏡筒、物鏡轉換 器、載物台、調焦裝置(粗調節器和細調節器）。光學系、统是顯微鏡最主要的部 i 分，起分辨和放大目的物的作用，其組成通常包含有：接目鏡、接物鏡 '集光 器、反光鏡、光源(有自然光源和電光源）。 美國專利第7,〇88,5〇5號揭露一種直立型顯微鏡（Upright Micr_pe)， 其包含有-麵微鏡座（Microscope Stand)、-個設置於該顯微鏡座内的調焦 裝置（Focusing Device)、一個載物台（Microsc0pe stage)、至少一個物鏡 (Objective)以及一個調節定位機構（AdjustableSt〇pMechanism)。該調節定 位機構用於限制該載物台沿光軸方向之運動範圍。該調焦裝置之第一和第二端 上分別設有至少-娜作元件（〇pe論n E1_t)，雜作元件各自從該顯 5 200825451 微鏡座之械讎巾凸㈣來。補賴舰的各儀上分卿有-個長形的 槽（Slot)’這些槽使得至少-個操作元件可以進行水平和豎直方向的位置切 換。 在顯微鏡之機械裝置中，調焦裝置是-個非常重要的環節。美國專利申請 案US 2005/015觀八1號中揭露-種用於數位顯微鏡（DigitalMicr_㈤的 透鏡模組（LensMo·)，其可用於簡單調節透鏡組（LensAssembly)和圖像 感測裝置（Image Sensing Assembly)之間的焦距（F〇calLength)。該透鏡模組 包括有一個座體（Seat)、一可伸縮的鏡筒（Telesc〇pic pipe)、一個透鏡組和 -個圖像感測裝置。該座體具有-個基部（Base顧），該基部内穿設有一個 開孔（Opening)。該可伸縮的鏡筒設置於該基部之前，並包括一個自該基部向 前延伸而出的後筒部分和一個前筒部分。該後筒部分與該基部之開孔同軸；該 前筒部分具有-個前端部和-個後端部，該後端部轴向、可動地與該後筒部分 配合在-起。其中，該後筒部分與該前筒部分之相對運動，即起卿節該透鏡 組與該圖像感測裝置之間的焦距的作用。 但是，這樣一種調焦裝置之焦距調節能力相對弱，無法進行精確調焦。 【發明内容】 本發明之目的在於提供一種應用於電子顯微鏡之調焦機構，其採用一種圍 繞旋轉中心作大直徑、小角度旋轉的方式，可以實現精確調焦，同時又具有旋 轉靈活的特點。 本發明之另一目的在於提供一種調焦機構，其將控制面板和調節旋钮與水 平面成一般角度（本發明爲28度）放置，以解決調節旋鈕之旋轉調節方向與 200825451 鏡片作動方向不一致的問題。 本發明之又_目的在於提供_翻#、機構，其料向結構和凸輪機構結合 運用，其中萬向機構的使用可以實現旋轉中心線成—般角度之傳動，而採用ώ 輪機構可控制目標物體作往復直線運動。將此兩種機構結合運用，可實現手動 調焦和手動對焦，方便操作，節省電能，且調節精確，傳動順暢。 爲實現上述目的，本發日月之調焦機構包含有一凸輪、一罩蓋、一調焦旋紐、 一固定板、-液晶顯示fig]定件及液晶顯示器、—電路板和—控制面板。 該罩蓋具有一罩體和一前對接部，該前對接部中間設有一貫穿其中之槽 孔。該凸輪具有一基緣部和一自該基緣部向外凸伸出之配合部，該配合部係朝 向該罩蓋之槽孔延伸，該基緣部係可轉動地定位於該罩蓋之罩體内部。該調焦 旋鈕與該刖對接部配合連接，且其具有一環壁、由該環壁圍繞之底部和位於該 調焦旋鈕中心之定位部，並且該定位部之外周表面與該罩蓋之前對接部上之槽 孔内壁相互接觸配合，以使該調焦旋紐定位於該罩蓋上。 該調焦旋紐之底部上設有三個同心之環形槽，並且在該罩蓋之前對接部上 對應該等環形槽設置有三個固定定位裝置，該等固定定位裝置分別伸入對應之 環形槽、並分別從中穿出；該凸輪通過一連接軸體與該調焦旋紐配接一體；當 該調焦旋紐旋轉時，該凸輪隨該調焦旋鈕一起旋轉。 該調焦旋奴之三個環形槽中之兩個環形槽位於同一圓周上，而另一環形槽 所處圓周之半徑略小於該兩個環形槽所處圓周之半徑、並與該兩個環形槽錯開 排列’從而該調焦旋钮可圍繞其旋轉中心作120度角旋轉。最好，該三個環形 槽之張角分別爲135度。 200825451 該調焦旋紐之定位部之與該罩蓋之槽孔内壁接觸配合之外周表面上設有 •一限位塊，以限制該調焦旋紐轉動的最大角度爲120度。且該定位部通過至少 一個支撐肋與該環壁相固連。 該連接轴體與該調焦旋鈕之旋轉中心一致，且包括相互垂直之旋轉軸和與 該凸輪相連之撥轉桿，該旋轉轴之一端設有一與該調焦旋鈕配合之連接部。該 調焦旋鈕之定位部之中心設有一凸起部，其中心設有一孔以與該連接軸體之連 接部相互配合。 該罩蓋之前對接部自該罩體向前傾斜延伸。該罩蓋之該等固定定位裝置分 別包括一定位柱和一螺釘柱。該固定板係收容於該調焦旋紐之環壁所圍成之空 間内，並且其位置設置不會影響該環形槽與該固定定位裝置之間的相對運動。 該固定板通過該等固定定位裝置之定位柱來實現定位，並且其上對應該等固定 定位裝置之螺釘柱設有相應之螺釘孔，以此將該固定板固定於該調焦旋叙之底 部上。 該液晶顯示器係固定於該液晶顯示器固定件上，二者一起收容於該調焦旋 (钮之環壁之内並層疊固定於該固定板上，該液晶顯示器及液晶顯示器固定件之 位置設置不會影響該調焦旋鈕之環形槽與該固定定位裝置之間的相對運動。 該電路板爲U形框狀，且該液晶顯示器正好位元元於其中間部分並從中 顯露出來。該控制面板之形狀設置使得該液晶顯示器可以被顯露出來，而該電 路板則被其覆蓋住。該電路板與該控制面板皆固定於該固定板上。 本發明之調焦機構，進一步包括一調焦旋姐橡膠套，其將該控制面板之邊 緣包住，並與該控制面板一起將該電路板、液晶顯示器、液晶顯示器固定件、 200825451 固定板及該調焦旋紐包袠於一體。 在通過旋轉該調焦旋鈕橡膠套來調節調焦旋鈕時，其上之控制面板、電路 板、液晶顯示器及液晶顯示器固定件、固定板等元件均保持位置不變。而該調 焦旋鈕之旋轉運動則通過連接轴體傳遞給凸輪，以帶動設置於該罩蓋内之光學 元件機構來實現焦距調節。 因此，本發明之調焦機構採用圍繞旋轉中心作大直徑、小角度旋轉的方 式，既能滿足轉動靈活的要求，又能實現精確之調焦目的。200825451 IX. DESCRIPTION OF THE INVENTION: • Technical field to which the invention pertains. The present invention relates to a focusing mechanism, and more particularly to a focusing mechanism that can be used for precise focus adjustment of a digital microscope. [Prior Art] The indispensable tool in microbiology experiments is the microscope to observe the shape, shape, size, etc. of microorganisms. There are many types of microscopes, such as ordinary optical microscopes (both monocular and double-tube), as well as higher-order phase contrast microscopes, fluorescence microscopes, dark-field microscopes, and advanced electron microscopes (transmissive and scanning). ) and atomic force microscopy. The microscope consists of two parts, a mechanical device and an optical system. The main function of the mechanical device is to fix the entire optical system on a straight line of optical axis, and precisely adjust the distance between the optical components so that the microscope can produce a clear image. The composition generally includes a mirror base and a mirror arm, a lens barrel, an objective lens converter, a stage, and a focusing device (a coarse adjuster and a fine adjuster). The optical system is the most important part of the microscope. It functions to distinguish and amplify the target. The composition usually includes: eyepiece, objective lens, concentrator, mirror, light source (with natural light source and electric light source). . U.S. Patent No. 7, 88, 5, 5 discloses an upright microscope (Upright Micr_pe) comprising a microscope stand, a focusing device disposed in the microscope holder (Focusing Device) ), a stage (Microsc0pe stage), at least one objective (Objective) and an adjustment positioning mechanism (Adjustable St〇pMechanism). The adjustment positioning mechanism is for limiting the range of motion of the stage in the optical axis direction. The first and second ends of the focusing device are respectively provided with at least a Nea element (〇pe on n E1_t), and the miscellaneous components are each derived from the mechanical dome of the micro-mirror seat (4). Each of the substations of the compensating ship has an elongated slot (Slot) which allows at least one of the operating elements to be horizontally and vertically displaced. In the mechanical mechanism of the microscope, the focusing device is a very important part. U.S. Patent Application No. US 2005/015, the entire disclosure of which is incorporated herein by reference. The focal length (F〇calLength) between the assembly. The lens module includes a seat (Seat), a telescopic barrel (Telesc〇pic pipe), a lens group and an image sensing device. The base body has a base, and an opening is formed in the base. The telescopic lens barrel is disposed in front of the base and includes a rearward extending from the base. a barrel portion and a front barrel portion. The rear barrel portion is coaxial with the opening of the base; the front barrel portion has a front end portion and a rear end portion, the rear end portion being axially and movably coupled to the rear barrel portion Cooperating in, wherein the relative movement of the rear barrel portion and the front barrel portion, that is, the effect of the focal length between the lens group and the image sensing device. However, the focal length of such a focusing device The adjustment ability is relatively weak and cannot be refined. [Invention] The object of the present invention is to provide a focusing mechanism applied to an electron microscope, which adopts a method of rotating a large diameter and a small angle around a center of rotation, thereby achieving precise focusing and flexible rotation. Another object of the present invention is to provide a focusing mechanism that places a control panel and an adjustment knob at a normal angle to the horizontal plane (28 degrees in the present invention) to solve the rotation adjustment direction of the adjustment knob and the direction of operation of the 200825451 lens. Inconsistent problem. The invention further aims to provide a combination of a material-oriented structure and a cam mechanism, wherein the use of the universal mechanism can realize the rotation of the center line in a general angle, and the use of the wheel The mechanism can control the target object to make a reciprocating linear motion. By combining the two mechanisms, manual focusing and manual focusing can be realized, which is convenient for operation, saves electric energy, and has precise adjustment and smooth transmission. To achieve the above purpose, the present day and month The focusing mechanism comprises a cam, a cover, a focusing knob, a fixing plate, - The crystal display shows a fixing member and a liquid crystal display, a circuit board and a control panel. The cover has a cover body and a front abutting portion, and the front abutting portion is provided with a slot penetrating therethrough. The cam has a base edge And a mating portion projecting outwardly from the base portion, the mating portion extending toward the slot of the cover, the base portion being rotatably positioned inside the cover of the cover. The focal knob is coupled to the mortise abutting portion, and has a ring wall, a bottom portion surrounded by the ring wall, and a positioning portion located at a center of the focusing knob, and the outer peripheral surface of the positioning portion and the front abutting portion of the cover portion The inner walls of the slot are in contact with each other to position the focusing knob on the cover. The bottom of the focusing knob is provided with three concentric annular grooves, and the abutting portion corresponds to a ring before the cover The slot is provided with three fixed positioning devices respectively extending into the corresponding annular grooves and respectively penetrating therethrough; the cam is coupled with the focusing knob through a connecting shaft body; when the focusing knob When rotating, the cam follows The focus knob rotates together. The two annular grooves of the three annular grooves of the focusing rotor are located on the same circumference, and the radius of the circumference of the other annular groove is slightly smaller than the radius of the circumference of the two annular grooves, and the two rings The slots are staggered so that the focus knob can be rotated at a 120 degree angle about its center of rotation. Preferably, the three annular grooves have an opening angle of 135 degrees. 200825451 The positioning portion of the focusing knob is in contact with the inner wall of the slot of the cover, and a limiting block is disposed on the peripheral surface to limit the maximum angle of rotation of the focusing knob to 120 degrees. And the positioning portion is fixed to the ring wall by at least one supporting rib. The connecting shaft body is coincident with the rotation center of the focusing knob, and comprises a rotating shaft perpendicular to each other and a rotating rod connected to the cam, and one end of the rotating shaft is provided with a connecting portion matched with the focusing knob. The center of the positioning portion of the focus knob is provided with a convex portion, and a hole is formed in the center thereof to cooperate with the connecting portion of the connecting shaft body. The front abutment portion of the cover extends obliquely forward from the cover body. The fixed positioning devices of the cover include a positioning post and a screw post, respectively. The fixing plate is received in a space surrounded by the ring wall of the focusing knob, and the positional setting does not affect the relative movement between the annular groove and the fixed positioning device. The fixing plate is positioned by the positioning post of the fixed positioning device, and the screw post corresponding to the fixed positioning device is provided with a corresponding screw hole, thereby fixing the fixing plate to the bottom of the focusing rotation on. The liquid crystal display is fixed on the liquid crystal display fixing member, and the two are housed in the focus ring (the ring wall of the button and laminated and fixed on the fixing plate, and the position of the liquid crystal display and the liquid crystal display fixing member are not set. The relative movement between the annular groove of the focusing knob and the fixed positioning device is affected. The circuit board has a U-shaped frame shape, and the liquid crystal display is exactly at the middle portion thereof and is exposed therefrom. The shape is set such that the liquid crystal display can be exposed, and the circuit board is covered by the board. The circuit board and the control panel are both fixed on the fixing plate. The focusing mechanism of the present invention further includes a focusing knob a rubber sleeve that encloses the edge of the control panel and, together with the control panel, the circuit board, the liquid crystal display, the liquid crystal display fixture, the 200825451 fixing plate, and the focusing knob are integrated into one body. When the focus knob rubber sleeve is used to adjust the focus knob, the control panel, circuit board, liquid crystal display, and liquid crystal display fixture, fixing plate, etc. The components are kept in the same position, and the rotating motion of the focusing knob is transmitted to the cam through the connecting shaft body to drive the optical component mechanism disposed in the cover to realize the focus adjustment. Therefore, the focusing mechanism of the present invention adopts The method of making large diameter and small angle rotation around the center of rotation can not only meet the requirements of flexible rotation, but also achieve precise focusing.
\ 【實施方式】 有關本發明調焦機構的詳細說明及技術内容，現即結合附圖說明如下： 請參閱第一及第二圖，本發明之調焦機構丨包含有：一凸輪1〇、一罩蓋 2〇、一調焦旋紐30、一調焦旋紐橡膠套4〇、一固定板5〇、一液晶顯示器固定 件60、一液晶顯示器70、一印刷電路板8〇和一控制面板9〇。 如第四圖所示’該罩蓋20具有-罩體21和-前對接部22。該前縣部 22自該罩體21向前伸出而相對於該罩體12呈駭角度的傾斜狀1前對接 部22中間設有-貫穿其中之槽孔23，該槽孔23係約略呈圓形，具有一圓形 内壁230，其-側設有-狐狀下凹壁面23卜其半徑係大於内壁半徑， 因此槽孔23具有二個不同半徑的圓弧内壁23〇、231。 同時參閱第一圖’凸輪1〇具有一可轉動地定位於該罩蓋如之罩體^ u ’ _ m緣部u _之配合部12。該凸輪㈣設置於 *的内侧而乂其軸〜約略平行於罩體21，但相對於前對接部η傾斜 凸輪1〇的配合部12係朝向該前對接部22延伸，並大致上對應於槽孔23。 如第二、第五及第六圖所示，該調焦旋钮3。係設置於罩蓋2。之前對接， 200825451 22的外侧’具有-圓柱狀環壁36，其係環繞著—底部39設置。—圓柱狀定位 部34自該底部39的中心突出’該定位部％插接於前對接部22之槽孔a内， 而使其賴表面340與該槽孔23的内壁咖相互接觸配合，以使該調焦触 30定位於該罩蓋20上，並能相對之轉動。 同時請參閱第八及第九圖，該調焦旋為3〇之底部39上設有三個環形槽 3卜32、33 ’其等雜調紐鈕3〇之轉動巾心同心設置，而在此實施例中亦 與該環壁36同心。在該罩蓋20之前對接部22上對應該等環形槽31、幻、33 的位置處設置衫儀定纽裝置，_找錄置分猶讀狀獅槽 3^32、％中，並分別從中穿出。該等固定定位裝置分別包含有—粒柱⑸、 252、253和-螺釘柱241、242、243。在圖示的實施例巾，該等螺釘柱241、 242、243係略呈圓柱狀，其外徑約略相當於環形槽3卜32、％的寬度，而可 於其内平順移動。 三個環形槽31、32、33中的兩個環形槽31、32是位於同一圓周上，即距 離調焦旋钮30之旋轉中心相同距離處。另—環形槽33所處圓周之半极略小於 該兩個環形槽3卜32所處圓周之半徑（亦即較靠近於該調焦旋紐3〇的旋轉中 心），並沿著環周方向與該兩個環形槽3卜32錯_列。該三個環形槽3卜 32、33之張角至少為120度’而在此實施例中爲135度，因此調焦旋紐如可 圍繞其旋轉中心作120度的轉動。 該凸輪10係、相對於藉由-連接軸體15與該調焦旋紐3〇配接一體。該連 接轴體IS科-旋轉軸1S2，係設置成與該調焦旋紐％之旋轉轴線一致，以 及-撥轉桿154，係自旋轉軸152之-側末端處向二側延伸而與之形成一失 200825451 角。在本實施例中，旋轉軸152與撥轉桿154係呈垂直狀。該旋轉軸152之另 一侧末端上設有一連接部150’而調焦旋鈕30之定位部34之中心設有一凸起 部35 ’其中心設有一孔350，可套置而結合至連接轴體15之旋轉轴152末端 上的連接部150，以供於其間傳遞旋轉運動。 另一方面，凸輪10的配合部12係呈空心圓柱狀結構，其圓柱狀侧壁上開 設有相對的_ 121，鱗縫隙121係沿著舰合部12之赠方向延伸相當 -段距離。在此實關巾，該等_ 121係沿著配合部12 _鋒線方向長 度開設。該等缝隙121喊度係可容納連接軸體15的撥轉桿154础相對移 動，但無法做相對旋轉。藉由撥轉桿154中位於旋轉軸152二侧的部份插置於 縫隙121内，連接軸體15將可以非同轴心方式接合至凸輪1〇上，並可將旋轉 運動傳遞至其上。 因此，當調焦旋紐30旋轉時，凸輪10藉由連接軸體15之帶動而隨調焦 旋姐30 —起旋轉。 在調焦旋紐30之定位部34的外周表面340上設有一限位塊％，其係活 動地容設於罩蓋2〇之槽孔23的下凹内壁231所構成的空間内，並可在調焦旋 钮30相對於罩蓋2〇轉動時，分別接觸至該下凹内壁23丄之二側肩部说而限 制調焦旋紐30的旋轉角度。在此實施例中，該弧形下凹内壁231係約為⑶ 度’故其二側肩部232間的炎角為12〇度，因此配合於限位塊％，可以將調 焦旋紐轉動3G的最大轉肖舰⑽度。翔焦她3〇的底部39的底 似設有多個支獅37 ’如圖帽賴三個，肋其結疑更有效地^ 定住定位部34與環壁36。 200825451 該固定板50係收容於該調焦旋紐3〇之環壁％所圍成之空間内，並且其 位置設置將不會影響環形槽31、32、33與對應之該固定定位裝置之間的相對 運動。固定板50係由該等固定定位裝置之定位柱％卜252、攻來加以定位， 並且其上對應該等固定定位裝置之螺釘柱加、242、243設有相應之螺釘孔(未 標號）’以供以螺針（未顯示）來將固定板5〇固定於該調焦旋紐3〇之底部邛 上。 液晶顯不器70固定於液晶顯示器固定件60上，二者一起收容於調焦旋鈕 30之環壁36所圍成的空間内而疊置固定於固定板5〇上。液晶顯示器7〇及液 晶顯示器固定件60之位置設置不會影響調焦旋鈕3〇之環形槽31、32、33與 對應之固定定位裝置之間的相對運動。 印刷電路板80係呈U形框狀，而液晶顯示器70則正好位於其中空的中 間間部分而顯露出來。控制面板90之形狀係可使得液晶顯示器70可以被顯露 出來，而印刷電路板80則夾置於液晶顯示器70與控制面板90之間，且該印 刷電路板80與控制面板90皆係固定於固定板50上。 調焦旋鈕橡膠套40係套設於調焦旋鈕30上而將該控制面板90之邊緣包 住，並與該控制面板90 —起將印刷電路板80、液晶顯示器70、液晶顯示器固 定件60、固定板50及調焦旋鈕30包裹於一體。 在通過旋轉該調焦旋鈕橡膠套40來調節該調焦旋鈕30時，其上之控制面 板90、積體電路板元件80、液晶顯示器70、液晶顯示器固定板60及固定板 5〇均保持位置不變。而該調焦旋鈕30之旋轉運動則通過連接軸體15傳遞給 凸輪10,以帶動設置於該罩蓋20内之光學元件機構（未圖示）來實現其焦距 12 200825451 再如第十騎示，本剌繼麟之傳賴齡織触3g、連接轴體 I5、凸輪10、對焦連接桿48、連接固定板45和透鏡單元92組成。根據其傳 動特徵可以將此傳動機構看作由萬向機構和凸輪傳動機構組成，其中萬向機構 由調焦雜30、連接軸體15和凸輪1〇組成，而凸輪傳賴構由凸輪、對 焦連接桿48、連接固定板45和透鏡單元％組成。 請同時參閲第十-圖和第十二⑷、⑼圖，萬向機構和凸輪機構之傳動銜 接部件為凸輪，其工作表面為作動面122 (見第十二圖(c))。凸輪的作 動面⑵與罩蓋2〇的工作表面42 (第十—圖）接觸，而通過罩蓋2〇和後蓋 體—(未圖示）裝蚊位。連接固定板48經過定位柱子定位後，㈣釘鎖固於 罩盍20上，對連接軸體15起導向作用(請參第十三圖）。 第十三圖所示爲本發明之調焦機構之作動原理圖。爲增強操作面板 ‘生’數位顯微鏡的控制面板90 (及調焦旋紐3〇)與水平面成一定角声放置 :第十三_示，調焦旋㈣與凸輪lG的旋轉中心轴之夾角為抑士 工3且It絲崎赖傳誠構，賴結構緊揍傳紐能㈣，但齒輪加 π。爲郎約成本，方便操作，採用了本發明之萬向—凸輪 使得結構更簡單’傳祕缺優良。 當手:調節調焦旋紐3。進行往復旋轉運動時，在連接她 Ζ凸輪Η)嫩撕順嫩_，瓣元％酬隹連接 “8的㈣下作上下倾錢赖，⑽ … . S貫現調焦和對焦的目的， 、為（R2_R1)(請參第十二（a)圖所示）。 13 200825451 本發明所適用之數位顯微鏡採用載物台水平顯微裝置垂直的方式放置。為 增強顯示之可視化和調節之便捷性，特將控制面板9〇和調節旋钮3〇與水平面 成般肖度（本發明爲28度）放置，採用本發明之調焦機構即可解決調節旋 鈕30旋轉調節方向與鏡片作動方向不一致的問題。 本發明將萬向結構和凸輪機構結合運用，其中萬向機構的使用可以實現旋 轉中心線成-般肖度之傳動，而凸輪機構的使_可控制目標物體作往復直線 運動。將此兩種機構結合運用，可實現手動調焦和手動對焦，方便操作，節省 電能，且調節精確，傳動順暢。 因此’本發明之調焦機構〗採用圍繞旋轉中心作大直徑、小角度旋轉的方 式，既能滿足轉動靈活的要求，又能實現精確之調焦目的。 雖然本發明已用較佳實施例揭露如上，然其並細以限定本發明，任何熟 習此技藝者，在不雌本剌之·和範#可作各種之更動與修改，因 此本發明之保護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 第一圖係本發明調焦機構之立體示意圖； 第二圖係本發明調焦機構之立體爆炸示意圖； 第三圖係第一圖之側面示意圖； 第四圖係本發明調焦機構之罩蓋之立體示意圖； 第五圖係本發明調焦機構之罩蓋與調焦旋鈕組合在一起之立體示意圖； 第六圖係本發明調焦機構之凸輪、連接轴體、調焦旋紐及調焦、旋紐橡膠套 組合在一起之立體示意圖； 200825451 第七圖係本發明調焦機構之連接軸體之立體示意圖； 第八圖係本發明調焦機構之調焦旋鈕之正面示意圖；及 第九圖係本發明調焦機構之調焦旋鈕之立體示意圖。 第十圖係本發明的側視圖，顯示出本發明之傳動機構與罩蓋間的空間關 第十一圖係本發明調焦機構之罩蓋的立體圖。 第十二圖係本發明調焦機構之凸輪的不同角度視圖。 第十三圖係本發明調焦機構的作動原理。 【主要元件符號說明】 1 調焦機構 10 凸輪 11 基緣部 12 配合部 121 縫隙 122 作動面 15 連接軸體 150 連接部 152 旋轉桿 154 撥轉桿 20 罩蓋 21 罩體 22 前對接部 23 槽孔 230 内壁 231 下凹内壁 241 定位柱 242 定位柱 243 定位柱 251 螺釘柱 252 螺釘柱 253 螺釘柱 15 200825451 30 調焦旋鈕 31 環形槽 32 環形槽 33 環形槽 34 定位部 340 外周表面 35 凸起部 350 孔 36 環壁 37 支撐肋 38 限位塊 39 底部 40 調焦旋紐橡膠套 42 工作表面 122 作動面 45 連接固定板 48 對焦連接桿 50 固定板 60 液晶顯不器固定件 70 液晶顯不 80 印刷電路板 90 控制面板 92 透鏡單元 16[Embodiment] The detailed description and technical content of the focusing mechanism of the present invention will now be described with reference to the accompanying drawings. Referring to the first and second figures, the focusing mechanism 本 of the present invention includes: a cam 1 〇, A cover 2〇, a focusing knob 30, a focusing knob rubber sleeve 4〇, a fixing plate 5〇, a liquid crystal display fixing member 60, a liquid crystal display 70, a printed circuit board 8〇 and a control Panel 9〇. As shown in the fourth figure, the cover 20 has a cover 21 and a front abutment 22. The front portion 22 protrudes forward from the cover 21 and is inclined at an angle relative to the cover 12. The front abutment portion 22 is provided with a slot 23 extending therethrough, and the slot 23 is approximately The circular shape has a circular inner wall 230, and its side is provided with a fox-like concave wall surface 23 whose radius is larger than the inner wall radius, so that the slot 23 has two circular inner walls 23 〇, 231 of different radii. Referring also to the first figure, the cam 1 has a mating portion 12 rotatably positioned on the cover such as the cover portion u u _ m edge portion u _. The cam (4) is disposed on the inner side of the * and the axis thereof is approximately parallel to the cover body 21, but the engaging portion 12 of the tilting cam 1'' with respect to the front butt portion η extends toward the front butt portion 22 and substantially corresponds to the groove Hole 23. The focus knob 3 is as shown in the second, fifth and sixth figures. It is provided on the cover 2. Prior to docking, the outer side of 200825451 22 has a - cylindrical annular wall 36 that is disposed around the bottom 39. - the cylindrical positioning portion 34 protrudes from the center of the bottom portion 39. The positioning portion is inserted into the slot a of the front butting portion 22, so that the facing surface 340 and the inner wall of the slot 23 are in contact with each other to The focus contact 30 is positioned on the cover 20 and is rotatable relative thereto. At the same time, please refer to the eighth and ninth figures. The bottom of the focusing turn is 3, and there are three annular grooves 3, 32, 33', and the twisting buttons of the three buttons are arranged concentrically. The ring wall 36 is also concentric with the embodiment. Before the cover 20, a matching device for the shirt is arranged at the position corresponding to the annular groove 31, the phantom, and the 33, and the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Wear it out. The fixed positioning devices respectively include a column (5), 252, 253 and a screw column 241, 242, 243. In the illustrated embodiment, the screw posts 241, 242, 243 are slightly cylindrical and have an outer diameter that is approximately equivalent to the width of the annular groove 3, 32%, and can be smoothly moved therein. The two annular grooves 31, 32 of the three annular grooves 31, 32, 33 are located on the same circumference, i.e., at the same distance from the center of rotation of the focus knob 30. In addition, the half pole of the circumference of the annular groove 33 is slightly smaller than the radius of the circumference of the two annular grooves 3 (i.e., closer to the center of rotation of the focusing knob 3〇), and along the circumferential direction And the two annular grooves 3 are 32 wrong_columns. The three annular grooves 3, 32, 33 have an opening angle of at least 120 degrees' and in this embodiment 135 degrees, so that the focusing knob can be rotated 120 degrees around its center of rotation. The cam 10 is integrally coupled to the focusing knob 3 相对 with respect to the connecting shaft body 15 . The connecting shaft body IS-rotating shaft 1S2 is disposed to coincide with the rotation axis of the focusing knob %, and the dial lever 154 extends from the side end of the rotating shaft 152 to the two sides. The formation of a lost 200825451 corner. In the present embodiment, the rotating shaft 152 and the dial 154 are perpendicular. The other end of the rotating shaft 152 is provided with a connecting portion 150'. The center of the positioning portion 34 of the focusing knob 30 is provided with a convex portion 35'. The center thereof is provided with a hole 350 which can be sleeved and coupled to the connecting shaft body. The connecting portion 150 on the end of the rotating shaft 152 of 15 is for transmitting a rotational motion therebetween. On the other hand, the engaging portion 12 of the cam 10 has a hollow cylindrical structure, and the cylindrical side walls are provided with opposite _121, and the scaly slits 121 extend along the direction of the ship's joint portion 12 by a considerable distance. In this case, the _121 is opened along the length of the mating portion 12_the front. The slits 121 are movably accommodated by the dials 154 of the connecting shaft 15 but are not relatively rotatable. By inserting the portion of the dial 154 on both sides of the rotating shaft 152 into the slot 121, the connecting shaft 15 can be non-coaxially coupled to the cam 1 and can transmit rotational motion thereto. . Therefore, when the focus knob 30 is rotated, the cam 10 is rotated by the focus knob 30 by the connection of the shaft body 15. A limiting block % is disposed on the outer peripheral surface 340 of the positioning portion 34 of the focusing knob 30, and is movably received in a space formed by the concave inner wall 231 of the slot 23 of the cover 2, and When the focus knob 30 is rotated relative to the cover 2, the two sides of the lower inner wall 23 are respectively contacted to limit the rotation angle of the focus knob 30. In this embodiment, the curved concave inner wall 231 is about (3) degrees, so the angle between the two shoulders 232 is 12 degrees, so that the focus knob can be rotated to match the limit block %. The maximum turning of 3G is 10 degrees. The bottom of the bottom 39 of her 3 〇 is like a plurality of lions 37' as shown in the figure. The ribs are more effective in fixing the positioning portion 34 and the ring wall 36. 200825451 The fixing plate 50 is housed in the space enclosed by the ring wall of the focusing knob 3,, and its position setting will not affect the relationship between the annular grooves 31, 32, 33 and the corresponding fixed positioning device. Relative movement. The fixing plate 50 is positioned by the positioning column 252 of the fixed positioning device, and the screw column plus 242 and 243 corresponding to the fixed positioning device are provided with corresponding screw holes (not labeled). The fixing plate 5 is fixed to the bottom cymbal of the focusing knob 3 by a screw (not shown). The liquid crystal display unit 70 is fixed to the liquid crystal display holder 60, and is housed in a space surrounded by the ring wall 36 of the focus knob 30 to be superposed on the fixed plate 5''. The positional setting of the liquid crystal display 7 and the liquid crystal display fixing member 60 does not affect the relative movement between the annular grooves 31, 32, 33 of the focus knob 3 and the corresponding fixed positioning means. The printed circuit board 80 has a U-shaped frame shape, and the liquid crystal display 70 is located just in the middle portion of the hollow portion thereof. The shape of the control panel 90 is such that the liquid crystal display 70 can be exposed, and the printed circuit board 80 is sandwiched between the liquid crystal display 70 and the control panel 90, and the printed circuit board 80 and the control panel 90 are fixed and fixed. On board 50. The focus knob rubber sleeve 40 is sleeved on the focus knob 30 to wrap the edge of the control panel 90, and together with the control panel 90, the printed circuit board 80, the liquid crystal display 70, the liquid crystal display fixture 60, The fixing plate 50 and the focusing knob 30 are wrapped in one body. When the focus knob 30 is adjusted by rotating the focus knob rubber sleeve 40, the control panel 90, the integrated circuit board component 80, the liquid crystal display 70, the liquid crystal display fixing plate 60, and the fixed plate 5 are held in position thereon. constant. The rotation of the focus knob 30 is transmitted to the cam 10 through the connecting shaft 15 to drive the optical component mechanism (not shown) disposed in the cover 20 to realize the focal length 12 200825451. The 剌 剌 麟 之 赖 赖 赖 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 织 。 。 。 According to its transmission characteristics, the transmission mechanism can be regarded as composed of a universal mechanism and a cam transmission mechanism, wherein the universal mechanism is composed of a focusing miscellaneous 30, a connecting shaft body 15 and a cam 1〇, and the cam transmission is constituted by a cam and focusing. The connecting rod 48, the connecting fixing plate 45 and the lens unit % are composed. Please also refer to the tenth-figure and twelfth (4) and (9) diagrams. The transmission interface of the universal joint mechanism and the cam mechanism is a cam whose working surface is the actuating surface 122 (see Figure 12 (c)). The active surface (2) of the cam is in contact with the working surface 42 (tenth-picture) of the cover 2, and the mosquito cover is placed through the cover 2〇 and the rear cover (not shown). After the connecting fixing plate 48 is positioned by the positioning post, the (4) nail is locked on the cover 20 to guide the connecting shaft 15 (refer to Fig. 13). Figure 13 is a schematic diagram showing the operation of the focusing mechanism of the present invention. In order to enhance the operation panel of the 'birth' digital microscope, the control panel 90 (and the focus knob 3〇) is placed at a certain angle with the horizontal plane: the thirteenth_shower, the angle between the focus rotation (four) and the rotation center axis of the cam lG is Suppressor 3 and It Sisaki Lai Chuan Cheng, the Lai structure is close to the New Zealand (four), but the gear plus π. For the cost of Lang, the operation is convenient, and the universal-cam of the present invention is adopted to make the structure simpler. When hand: Adjust the focus knob 3. When performing the reciprocating rotary motion, the Ζ Ζ 在 连接 连接 , , , , , , , , , , , , , , , , , , , , , , , , , , , , 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣 瓣(R2_R1) (refer to Figure 12 (a)). 13 200825451 The digital microscope to which the present invention is applied is placed in a vertical manner by a stage horizontal microscopic device. To enhance the visualization and adjustment convenience of the display. The control panel 9 〇 and the adjustment knob 3 放置 are placed in a similar manner to the horizontal plane (28 degrees in the present invention), and the focusing mechanism of the present invention can solve the problem that the rotation adjustment direction of the adjustment knob 30 is inconsistent with the lens movement direction. The invention combines the universal structure and the cam mechanism, wherein the use of the universal mechanism can realize the transmission of the rotation center line in a general degree, and the cam mechanism can control the target object to reciprocate linear motion. The combination of various mechanisms can realize manual focusing and manual focusing, which is convenient for operation, saves electric energy, and has precise adjustment and smooth transmission. Therefore, the focusing mechanism of the present invention is used around the center of rotation. The method of rotating the diameter and the small angle can meet the requirements of the flexibility of rotation and achieve the purpose of precise focusing. Although the present invention has been disclosed in the above preferred embodiments, and is used to limit the present invention, any skill in the art is known. In addition, the invention may be modified and modified in various ways. Therefore, the scope of protection of the present invention is subject to the definition of the scope of the appended patent application. [Simple description of the drawing] The schematic diagram of the three-dimensional explosion of the focusing mechanism of the present invention; the third drawing is a schematic side view of the first drawing; the fourth drawing is a three-dimensional schematic view of the cover of the focusing mechanism of the present invention; The fifth figure is a three-dimensional schematic diagram of the cover of the focusing mechanism of the present invention combined with the focusing knob; the sixth figure is the cam of the focusing mechanism of the invention, the connecting shaft body, the focusing knob and the focusing, the knob rubber sleeve 3D is a schematic diagram of a connecting shaft body of the focusing mechanism of the present invention; and FIG. 8 is a front view of a focusing knob of the focusing mechanism of the present invention; The ninth drawing is a perspective view of the focusing knob of the focusing mechanism of the present invention. The tenth drawing is a side view of the present invention, showing the space between the transmission mechanism and the cover of the present invention. Fig. 12 is a perspective view of the cam of the focusing mechanism of the present invention. Fig. 13 is the operating principle of the focusing mechanism of the present invention. [Description of main components] 1 Focusing mechanism 10 Cam 11 base portion 12 mating portion 121 slit 122 actuating surface 15 connecting shaft 150 connecting portion 152 rotating rod 154 rotating rod 20 cover 21 cover 22 front butt portion 23 slot 230 inner wall 231 concave inner wall 241 positioning post 242 positioning Column 243 Positioning post 251 Screw post 252 Screw post 253 Screw post 15 200825451 30 Focusing knob 31 Annular groove 32 Annular groove 33 Annular groove 34 Positioning part 340 Outer peripheral surface 35 Projection 350 Hole 36 Ring wall 37 Support rib 38 Limit block 39 Bottom 40 Focusing Rotary Rubber Cover 42 Working Surface 122 Actuating Surface 45 Connection Fixing Plate 48 Focusing Connecting Rod 50 Fixing Plate 60 Liquid Crystal Display Fixing Plate 70 Liquid The printed circuit board 80 is not significant 90 control panel 92 of the lens unit 16