201027233 五、發明說明： 【發明所屬之技術領域】 本發明係有關於一種應用於攝影裝置的切換機構，尤 指一種利用簡單的機構、低嗓音、且不需有複雜的控制單 元條件下’達成切換濾光片的切換機構。 【先前技術】 一般攝影機無論是使用CCD或者是CMOS的感測元 • 件’為求在白天與黑夜的影像擷取狀態維持較佳的狀態， 需要在黑夜與白天的兩段使用狀態下做切換濾光片的動 作’以期在白天維持較高的影像真實性，在夜晚一樣能清 楚地運作◊因此，這是一個普遍搭配攝影裝置上的一種具 切換濾光片功能的結構。 …、而’一個可以達成切換濾光片的切換機構其控制方 法有很多’從控制的角度來看’大致上可區分成兩種· ❹A_封閉性迴路控制法：此為具有回饋訊號的控制方式，也 就是在控制馬達運動，馬達帶動機構後，被控制之機構 到達一定的位置或條件，即回饋訊號到達控制單元，以 調整馬達控制的狀態。這樣的控制方式能掌握動裝置的 •狀態，是一種穩定的方法；但缺點是成本較為昂貴設 d十上空間不易減小。 Β·開放性迴路控制法 達驅動機構，由輸 :這樣的控制方法僅是單向的藉由馬 入單元進行主動控制，並無法得知被 201027233 控制裝置的狀態；這樣的裝置簡單、廉價，無需特別的 控制器及回饋機構’當然，相對地，這樣的機構經常遭 遇到的問題是，在沒有位置偵測裝置（如：開關、感應 器）的前提下，當從動裝置受到阻礙時，若無法斷開致 動裝置（如：馬達）與被動裝置之間的運動關係，最終 將導致運動鏈當中的裝置受損，可能是馬達或是傳動機 構（馬達的機會是最高）。所以，為了避免這樣的情況， • 斷開與結合的制必然'存在於這樣的控構中，應用 摩擦力拘束控制的方式經常被使用，也因此噪音自然伴 隨產生。此方法的優點是，可以用較小、較簡單的機構 達成動作目標，成本也相對低廉；但，有先天上無法克 服的控制缺點，就是無法掌握被控制物的狀態以及噪音 問題》 有鑑於此，發明人基於多年經驗特別提出—種應用 β於攝影裝置的切換機構，希企能解決上述之各項問題。 【發明内容】 長期以來對⑨開放性迴路控制機構一直存在穩定性及 嗓曰上的困擾，因此，若能夠從設計的角度維持住開放性 33路控制的優點，同時解決掉衍生的缺點，將對產品的品 質及競爭力提升有很大幫助。本發明的構想主要是希望藉 助螺纹與螺帽之間較精細的接觸行為以及較穩定的定位特 性，搭配蜗桿蜗輪高減速比的效果，製造出一組低嗓音、 5 201027233 高穩定性的開放性迴路控制機構，並可以很方便地在各系 統上運用。 本發明之主要目的在於提供一種應用於攝影裝置的切 換機構α利用簡單的機構、低嗓音、且不需有複雜的控 制單元條件下，達成切換濾光片的功效。 一種應用於攝影裝置的切換機構，包括：一驅動裝置； 一第一齒輪，係連接於該驅動一帛二齒輪，係連接 於該第-齒輪；及-導螺桿，該導螺桿之一端係裝設於第 二齒輪；其中，驅動裝置利用螺旋紋驅動的方式驅動第一 齒輪，第一齒輪再利用螺旋紋驅動的方式驅動第二齒輪， 第二齒輪因而旋轉，並驅使導螺桿旋轉，導螺桿上套設有 螺帽，該螺帽係由導螺桿的旋轉而可在導螺桿上相對移 動，當螺帽移動出導螺桿的一螺紋區域後，螺帽會因導螺 桿二端中任一端所具有的限位塊所限制移動，螺帽與導螺 桿於是呈半脫離狀態。 【實施方式】 本發明係有關於一種應用於攝影裝置的切換機構，為 了能更清楚地描述本發明所提出之，以下將配合圖示詳細 說明之。 用 影 請參閱第-圖、第二圖與第三圖，係本發明之一種應 於攝影裝置的切換機構上視示意圖、本發明之應用於攝 裝置的切換機構立體圖式與本發明之應用於攝影裝置的 201027233 切換機構中一螺帽與一導 導螺#呈半脫離狀態示意圖。本發 明之應用於攝影裝置的切換 換機構1包括：一驅動裝置11， 係可為一馬達；一第一齿銓 — 齒輪12 ’係連接於該驅動裝置11; 第一齒輪13，係連接於兮·笛 、 第—齒輪12 ;及一導螺桿14， 該導螺桿14之一端係裝設該第二齒輪13;其中，驅動裝 置"利用其一導螺桿⑴上的螺旋紋驅動第一齒輪12, 齒輪12再利用其上的螺旋紋驅動第二齒輪^，第二 齒輪13因而旋轉，並驅使導螺桿14旋轉，該導螺桿14上 套設有-螺帽15，該螺帽15係由導螺桿14的旋轉而可在 導螺桿Μ上相對移動’當螺帽15移動出導螺桿μ的一螺 紋區域（圖中未示）後，螺帽15會因導螺桿14二端中任 -端所具有的限位塊16與16，所限制移動，螺帽Η與導螺 桿14於是呈半脫離狀態，如第三圖所示，螺帽15的一螺 e 紋⑸會與導螺桿14的-螺紋⑷作小距離的分開’本圖 之實施例係螺帽15移動至限位塊16處，即因著螺帽㈣ 動至該極限處，才會稱微與導螺桿14分開，且僅剩下二螺 紋末端間細微的磨擦，因此幾乎沒有噪音，再者，當馬達 11作另一轉向時，則重新透過導螺桿lu、第一齒輪12、 第二齒輪13與導螺桿14的驅動，令螺帽15的螺紋151與 導螺桿14的螺紋141重新嚙合，而將螺帽15往限位塊 方向移動，該螺帽15更連接一平移機構17，該平移機構 17連接至一濾光片18與一玻璃片19,當螺帽15在導螺桿 7 201027233 14上移動時，即可直接驅動平移機構17，再者可以移動誃 濾光片18與該玻璃片19至一定位置，該位置係相對於螺 帽15與導螺桿14呈半脫離狀態之位置，該濾光片18或該 玻璃片19前方更設置一透鏡20,濾光片18或破璃片19 之後方更設置一影像擷取裝置21，該影像擷取裝置21包 括一 CCD感光元件22與一印刷線路板23。當然，該CCD 感光元件亦可以是CMOS感光元件。 然而，請注意的是，上述之切換機構1、導螺桿u1、 第一I輪12、第二齒輪13、導螺桿14、螺帽15與限位塊 16與16’在第一圖中因係上視圖之角度關係，其實際水平 層面並不與其他元件同一層面。其中螺帽15與一平移機構 17的連結不限定位置，只要不干擾光源所有進入感光元件 22的空間即可。 經由上述的結構，可以瞭解濾光片18和玻璃片19是 如何的切換，如此，除了可使一般的攝影裝置依照白天與 夜晚不同的光度條件而運用濾光片和破璃片外，更可以避 開過多的噪音、阻力與無法復歸的狀況。再者，本結構簡 單、成本低、組裝容易，相對地，維修成本亦低。 綜觀以上所述’本發明解決了進行非確動（如前述用 摩擦力連結的狀態’解決特定位置要斷開的設計目的）運 動又要能降低脫離與連結時的振動噪音問題，也同時在設 計上製造了許多應用的優點，詳述如下： 201027233 Α·使用蝎桿蜗輪做為減速齒輪增加減速比，應用在此切換 機構上可提高運動之可靠度。 Β.整體結構可以因此概念而所縮小，因此可以很容易將此 设计模組化’成為一個在開放性迴路控制上一個廉價、 可靠和利用性高的模組。 C.若是將此模組應用在直線往復運動上的話，僅需控制螺 桿的距離及螺帽限制的位置，即可決定出往復運動機構 # 的行程。 於是’本發明專利申請案係利用發明人豐富的經驗， 以極富創意的構思，設計出簡單卻能充分解決習知技術的 問題。因此，本發明專利申請案的功能，確實符合具有新 穎性與進步性的專利要件。 唯以上所述者，僅為本發明之較佳實施例，當不能以 之限制本發明範圍。即大凡依本發明申請專利範圍所做之 均等變化及修飾，仍將不失本發明之要義所在，亦不脫離 本發明之精神和範圍，故都應視為本發明的進一步實施狀 況。 201027233 【圖式簡單說明】 第一圖 係本發明之一種應用於攝影裝置的切換機構上 視不意圖， 第二圖 係本發明之應用於攝影裝置的切換機構立體圖 式；與 第三圖 係本發明之應用於攝影裝置的切換機構中一螺 帽與一導螺桿呈半脫離狀態示意圖。 【主要元件符號說明】 1 切換機構 11 驅動裝置 111 導螺桿 12 第一齒輪 13 第二齒輪 14 導螺桿 141 螺紋 15 螺帽 151 螺紋 16 限位塊 16, 限位塊 17 平移機構 18 濾光片 10 201027233 19 玻璃片 20 透鏡 21 影像擷取裝置 22 CCD感光元件 23 印刷線路板201027233 V. OBJECTS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a switching mechanism applied to a photographing apparatus, and more particularly to a method of using a simple mechanism, low-pitched sound, and without complicated control unit Switch the switching mechanism of the filter. [Prior Art] Whether the camera uses a CCD or a CMOS sensor element to maintain a better state of day and night image capture, it is necessary to switch between two states of day and night. The action of the filter 'supplied to maintain high image realism during the day and work clearly at night. Therefore, this is a structure with a switching filter function on a universal photographic device. ..., and 'a switching mechanism that can achieve switching filters. There are many control methods from the perspective of control. It can be roughly divided into two types. ❹A_Closed loop control method: This is the control with feedback signal The mode, that is, after controlling the motor movement, after the motor drives the mechanism, the controlled mechanism reaches a certain position or condition, that is, the feedback signal reaches the control unit to adjust the state of the motor control. Such a control method can grasp the state of the moving device, and is a stable method; but the disadvantage is that the cost is relatively expensive, and it is difficult to reduce the space. Β·Open loop control Fada drive mechanism, by the transmission: This control method is only one-way by the horse into the unit for active control, and can not know the state of the 201027233 control device; such a device is simple, inexpensive, no need Special controllers and feedback mechanisms 'Of course, the problem often encountered with such a mechanism is that when there is no position detection device (such as a switch or a sensor), when the slave device is blocked, The inability to disconnect the motion between the actuator (eg motor) and the passive device will eventually result in damage to the device in the kinematic chain, possibly the motor or the transmission (the motor has the highest chance). Therefore, in order to avoid such a situation, • the system of disconnection and combination necessarily exists in such a control, and the method of applying frictional restraint control is often used, and thus noise is naturally accompanied. The advantage of this method is that the action target can be achieved with a smaller, simpler mechanism, and the cost is relatively low; however, there are inherently incomprehensible control shortcomings, that is, the state of the controlled object and the noise problem cannot be grasped. The inventor has specially proposed a switching mechanism for applying β to a photographic device based on years of experience, and the company can solve the above problems. [Summary of the Invention] For a long time, the 9 open loop control mechanism has always had stability and embarrassing problems. Therefore, if the advantages of the open 33-way control can be maintained from the design point of view, and the disadvantages of the derivative are solved, It is of great help to the quality and competitiveness of the products. The concept of the present invention is mainly to create a set of low-pitched sounds, 5 201027233, high stability by means of the finer contact behavior between the thread and the nut and the more stable positioning characteristics, combined with the high reduction ratio of the worm and the worm gear. The circuit control mechanism can be easily applied to each system. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a switching mechanism α applied to a photographing apparatus which achieves the effect of switching a filter with a simple mechanism, low noise, and without complicated control unit. A switching mechanism applied to a photographing device, comprising: a driving device; a first gear coupled to the driving gear, connected to the first gear; and a lead screw, one end of the lead screw Provided in the second gear; wherein the driving device drives the first gear by means of a spiral driving, the first gear drives the second gear by means of a spiral driving, the second gear thus rotates, and drives the lead screw to rotate, the lead screw The upper sleeve is provided with a nut which is relatively movable on the lead screw by the rotation of the lead screw. When the nut moves out of a threaded area of the lead screw, the nut may be at either end of the lead screw. The limit block has a limit to move, and the nut and the lead screw are in a semi-disengaged state. [Embodiment] The present invention relates to a switching mechanism applied to a photographing apparatus, which will be described in more detail in conjunction with the drawings in order to more clearly describe the present invention. Referring to FIG. 2, FIG. 2 and FIG. 3, a perspective view of a switching mechanism of the present invention applied to a switching mechanism of the present invention, and a switching mechanism for applying to the present invention of the present invention are applied to the present invention. In the 201027233 switching mechanism of the photographing device, a nut and a guide screw # are in a semi-disengaged state. The switching mechanism 1 of the present invention for use in a photographic apparatus includes: a driving device 11 which can be a motor; a first gingle-gear 12' is coupled to the driving device 11; the first gear 13 is connected to a flute, a first gear, and a lead screw 14, one end of the lead screw 14 is provided with the second gear 13; wherein the driving device " drives the first gear with a spiral on a lead screw (1) 12, the gear 12 uses the spiral pattern thereon to drive the second gear ^, the second gear 13 thus rotates, and drives the lead screw 14 to rotate. The lead screw 14 is sleeved with a nut 15 which is composed of a nut 15 The rotation of the lead screw 14 can be relatively moved on the lead screw '. After the nut 15 moves out of a threaded area (not shown) of the lead screw μ, the nut 15 is caused by the end of the lead screw 14 With the limiting blocks 16 and 16, the movement is restricted, and the nut Η and the lead screw 14 are in a semi-disengaged state. As shown in the third figure, a screw pattern (5) of the nut 15 and the lead screw 14 are The thread (4) is separated by a small distance. The embodiment of the figure moves the nut 15 to the limit block 16, that is, When the cap (4) moves to the limit, it is said that the micro is separated from the lead screw 14, and only a slight friction between the ends of the two threads is left, so there is almost no noise, and when the motor 11 makes another turn, it is re-transmitted. The driving of the lead screw lu, the first gear 12, the second gear 13 and the lead screw 14 causes the thread 151 of the nut 15 to re-engage with the thread 141 of the lead screw 14, and moves the nut 15 toward the limiting block. The nut 15 is further connected to a translation mechanism 17, which is connected to a filter 18 and a glass sheet 19. When the nut 15 moves on the lead screw 7 201027233 14, the translation mechanism 17 can be directly driven. The filter 18 and the glass piece 19 can be moved to a position which is semi-disengaged with respect to the nut 15 and the lead screw 14, and the filter 18 or the glass piece 19 is further disposed in front of the glass piece 19. An image capturing device 21 is further disposed behind the lens 20, the filter 18 or the glazing sheet 19. The image capturing device 21 includes a CCD photosensitive member 22 and a printed wiring board 23. Of course, the CCD photosensitive element can also be a CMOS photosensitive element. However, it should be noted that the above-mentioned switching mechanism 1, the lead screw u1, the first I wheel 12, the second gear 13, the lead screw 14, the nut 15 and the limit blocks 16 and 16' are in the first figure. The angle of view of the upper view, the actual level of the level is not the same level as other components. The connection of the nut 15 to a translation mechanism 17 does not limit the position as long as it does not interfere with all the space of the light source entering the photosensitive element 22. Through the above structure, it is possible to understand how the filter 18 and the glass sheet 19 are switched, and thus, in addition to the use of the filter and the glazing, the general photographic apparatus can be used according to different luminosity conditions during the day and night. Avoid excessive noise, resistance and irreversible conditions. Furthermore, the structure is simple, low in cost, easy to assemble, and relatively low in maintenance costs. In view of the above, the present invention solves the problem of performing non-actuation (such as the above-mentioned state of frictional connection to solve the design purpose of disconnecting a specific position), and the vibration noise problem at the time of disconnection and connection is also reduced. Designed to create the advantages of many applications, as detailed below: 201027233 Α · Use the mast worm gear as a reduction gear to increase the reduction ratio, the application of this switching mechanism can improve the reliability of motion.整体. The overall structure can be reduced by this concept, so it is easy to modularize this design into a cheap, reliable and usable module for open loop control. C. If the module is applied to a linear reciprocating motion, the stroke of the reciprocating mechanism # can be determined simply by controlling the distance of the screw and the position of the nut restriction. Thus, the patent application of the present invention utilizes the inventor's rich experience to design a simple but fully problematic solution to the conventional technology with a very creative concept. Therefore, the function of the patent application of the present invention does meet the patent requirements with novelty and progress. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto. It is to be understood that the scope of the present invention is not limited by the spirit and scope of the present invention, and should be considered as a further embodiment of the present invention. 201027233 [Simplified illustration of the drawings] The first figure is a switching mechanism applied to a photographing device of the present invention, and the second drawing is a perspective view of a switching mechanism applied to the photographing device of the present invention; In the switching mechanism applied to the photographing device of the invention, a nut and a lead screw are in a semi-detached state. [Main component symbol description] 1 Switching mechanism 11 Drive unit 111 Lead screw 12 First gear 13 Second gear 14 Lead screw 141 Thread 15 Nut 151 Thread 16 Limit block 16, Limit block 17 Translation mechanism 18 Filter 10 201027233 19 Glass sheet 20 Lens 21 Image capturing device 22 CCD sensor 23 Printed circuit board