TWI417641B - Diaphragm device - Google Patents
Diaphragm device Download PDFInfo
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- TWI417641B TWI417641B TW098132290A TW98132290A TWI417641B TW I417641 B TWI417641 B TW I417641B TW 098132290 A TW098132290 A TW 098132290A TW 98132290 A TW98132290 A TW 98132290A TW I417641 B TWI417641 B TW I417641B
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- aperture
- gear
- motor
- rotation
- diaphragm
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
- G03B9/14—Two separate members moving in opposite directions
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/02—Diaphragms
- G03B9/06—Two or more co-operating pivoted blades, e.g. iris type
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
- G03B9/24—Adjusting size of aperture formed by members when fully open so as to constitute a virtual diaphragm that is adjustable
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
- G03B9/26—Blade or disc rotating or pivoting about axis normal to its plane incorporating cover blade or blades
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Diaphragms For Cameras (AREA)
Description
本發明係關於攝影機、照相機、監視攝影機等光學機器用的光圈裝置。The present invention relates to an aperture device for an optical device such as a camera, a camera, or a surveillance camera.
在此種光圈裝置之中，有如下所述者：在具有形成光路之開口部的光圈基板上以自由直線滑動的方式配設2枚光圈葉片，利用突出設置在轉動桿的驅動銷使此2枚光圈葉片彼此往相反方向往復滑動，藉而對該光路進行光圈調節。並且，在專利文獻1中揭示有裝備步進馬達作為用於轉動轉動桿之驅動源者，在專利文獻2中揭示有使齒輪減速機構介設於步進馬達與轉動桿之間者。In the above-mentioned aperture device, two aperture blades are disposed so as to be freely linearly slid on the diaphragm substrate having the opening portion forming the optical path, and the drive pins provided on the rotation lever are used to make the 2 The aperture coils slide back and forth in opposite directions to each other, thereby performing aperture adjustment on the optical path. Further, Patent Document 1 discloses that a stepping motor is provided as a driving source for rotating a rotating lever, and Patent Document 2 discloses that a gear reduction mechanism is interposed between a stepping motor and a rotating lever.
在使齒輪減速機構介設於步進馬達與轉動桿之間時，可獲得高於步進馬達解析度的光圈葉片解析度。在專利文獻2之技術中，揭示有組合螺旋軸與圓弧齒輪作為齒輪減速機構者。When the gear reduction mechanism is interposed between the stepping motor and the rotating lever, the resolution of the diaphragm blade higher than the resolution of the stepping motor can be obtained. In the technique of Patent Document 2, a combination of a screw shaft and a circular arc gear as a gear reduction mechanism is disclosed.
專利文獻1：日本特許第4068684號公報Patent Document 1: Japanese Patent No. 4068084
專利文獻2：日本特開平8-328080號公報Patent Document 2: Japanese Laid-Open Patent Publication No. Hei 8-328080
然而，雖然因為在使齒輪減速機構介設於步進馬達與轉動桿之間時，可獲得高於步進馬達解析度的光圈葉片解析度，故能以高精度的方式進行光圈控制，但當如專利文獻2記載之技術藉由螺旋軸與圓弧齒輪等構成齒輪減速機構時，由於齒輪機構部分之配合關係的影響，故有包含步進馬達之驅動系統的安裝空間將變大，無法實現小型佈局之問題。However, although the resolution of the aperture blade higher than the resolution of the stepping motor can be obtained when the gear reduction mechanism is interposed between the stepping motor and the rotation lever, the aperture control can be performed with high precision, but when When the technique described in Patent Document 2 constitutes a gear reduction mechanism by a screw shaft or a circular arc gear or the like, the installation space of the drive system including the stepping motor becomes large due to the influence of the cooperation relationship of the gear mechanism portion, and the installation space cannot be realized. The problem of small layout.
本發明思及上述情形，目的在於提供光圈裝置，可使齒輪減速機構介設於步進馬達與驅動光圈葉片的轉動桿之間，並且實現包含步進馬達之驅動系統的佈局之小型化。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an aperture device which can interpose between a stepping motor and a rotating lever of a driving diaphragm blade and realize miniaturization of a layout of a driving system including a stepping motor.
申請專利範圍第1項之發明的光圈裝置，其特徵在於，包含：光圈基板，具有形成光路的開口部；2枚光圈葉片，以自由直線滑動的方式設置在該光圈基板上，並使彼此往相反方向往復滑動驅動，藉而對該光路進行光圈調節；轉動桿，為了驅動該光圈葉片，將自身的轉動軸線朝向直交於該光圈基板的方向，以自由轉動的方式安裝在該光圈基板；一對驅動銷，突出設置於從該轉動桿上之該轉動軸線離開的位置，各自以自由滑動的方式卡合到在該各光圈葉片形成、且在與該光圈葉片之滑動方向直交的方向為長的長孔，並藉由該轉動桿的轉動，使該光圈葉片彼此往相反方向滑動驅動；步進馬達，為了旋轉驅動該轉動桿，使自身的轉軸朝向直交於該光圈基板的方向，並安裝在該光圈基板；減速齒輪機構，介設於該轉動桿與該步進馬達的轉軸之間；該減速齒輪機構藉由下列各部分構成：馬達齒輪(pinion)，安裝在該步進馬達的轉軸；內齒輪，在該轉動桿形成為一體，與該馬達齒輪直接或透過中間齒輪而間接地囓合。The aperture device according to the first aspect of the invention, comprising: a diaphragm substrate having an opening for forming an optical path; and two aperture blades disposed on the aperture substrate so as to be freely linearly slidable a reciprocating sliding drive in the opposite direction, thereby performing aperture adjustment on the optical path; the rotating rod is mounted on the aperture substrate in a freely rotatable manner in order to drive the aperture blade in a direction orthogonal to the aperture substrate; The driving pin is protruded from a position away from the rotation axis of the rotating rod, and is slidably engaged with each of the aperture blades and formed in a direction orthogonal to a sliding direction of the aperture blade The long hole, and the rotation of the rotating rod, the diaphragm blades are slidably driven in opposite directions; the stepping motor, in order to rotationally drive the rotating rod, has its own rotating shaft oriented in a direction orthogonal to the diaphragm substrate, and is mounted a reduction gear mechanism interposed between the rotating rod and a rotating shaft of the stepping motor; the reduction gear By the following configuration components: a motor gear (pinion), mounted on the rotary shaft of the stepping motor; internal gear, the rotating lever is formed integrally, directly or through an intermediate gear meshing indirectly with the motor gear.
申請專利範圍第2項之發明，係如申請專利範圍第1項之光圈裝置，其中，在該光圈基板上設有光圈葉片驅動機構安裝部，且該附設內齒輪的轉動桿受到突出設置在該光圈葉片驅動機構安裝部上的轉動桿用支持軸以自由旋轉的方式支持，另一方面，在該光圈葉片驅動機構安裝部的上部，以被覆該附設內齒輪之轉動桿的方式組裝有馬達安裝罩蓋，在該馬達安裝罩蓋的外部安裝有該步進馬達，穿過在此馬達安裝罩蓋形成的開口，將安裝在該步進馬達之轉軸的馬達齒輪***到該馬達安裝罩蓋的內側，該馬達齒輪在該馬達安裝罩蓋的內側，直接或透過中間齒輪而間接地囓合於該內齒輪。The invention of claim 2 is the aperture device of claim 1, wherein the aperture plate drive mechanism mounting portion is provided on the aperture substrate, and the rotating lever attached to the internal gear is protruded from the The rotating lever on the diaphragm blade drive mechanism mounting portion is rotatably supported by the support shaft, and the motor mounting is assembled on the upper portion of the diaphragm blade drive mechanism mounting portion so as to cover the rotating lever with the internal gear attached thereto. a cover, the stepping motor is mounted outside the motor mounting cover, and the motor gear mounted on the rotating shaft of the stepping motor is inserted into the motor mounting cover through an opening formed in the motor mounting cover On the inner side, the motor gear is indirectly meshed with the inner gear directly or through the intermediate gear inside the motor mounting cover.
申請專利範圍第3項之發明，係如申請專利範圍第2項之光圈裝置，其中，該減速齒輪機構係由下列各部分構成：該馬達齒輪；該內齒輪；中間齒輪，介設於該馬達齒輪與該內齒輪之間；該中間齒輪在同一軸線上成一體設有囓合於該馬達齒輪的大齒輪、與囓合於該內齒輪的小齒輪，另一方面，在該光圈葉片驅動機構安裝部上，突出設置有中間齒輪支持軸，鄰接於該轉動桿用支持軸，並穿過在該內齒輪的內側設置的該轉動桿上之缺口而貫通該轉動桿，該中間齒輪受到該中間齒輪支持軸以自由旋轉的方式支持。The invention of claim 3 is the aperture device of claim 2, wherein the reduction gear mechanism is composed of the following parts: the motor gear; the internal gear; the intermediate gear is disposed on the motor Between the gear and the internal gear; the intermediate gear is integrally provided with a large gear meshed with the motor gear on the same axis, and a pinion gear meshed with the internal gear, and on the other hand, the mounting portion of the diaphragm blade drive mechanism An intermediate gear support shaft is protruded, adjacent to the support shaft for the rotating rod, and penetrates the rotating rod through a notch on the rotating rod disposed inside the internal gear, and the intermediate gear is supported by the intermediate gear The shaft is supported in a freely rotating manner.
申請專利範圍第4項的發明，係如申請專利範圍第1至3項中任一項之光圈裝置，其中，設有無背隙機構，藉由將該附設內齒輪的轉動桿往單方向旋轉推壓，而吸收該內齒輪與該馬達齒輪之間的齒輪背隙，該無背隙機構係由磁石與磁性構件所構成，該磁石與磁性構件各自設置在該轉動桿側、與該光圈基板或馬達安裝罩蓋等固定側的一方與另一方，彼此使磁力相互作用並藉由磁力而旋轉推壓該轉動桿，將該藉由磁力而旋轉推壓該轉動桿之區域設定為：至少為光圈孔徑較小的小光圈側之該轉動桿的轉動區域。The invention of claim 4 is the aperture device of any one of claims 1 to 3, wherein the backlash mechanism is provided, and the rotating rod with the internal gear is rotated in one direction Pressing, and absorbing a gear backlash between the internal gear and the motor gear, the backlash-free mechanism is composed of a magnet and a magnetic member, the magnet and the magnetic member are respectively disposed on the rotating rod side, and the aperture substrate or One of the fixed sides of the motor mounting cover and the other side interacts with each other by magnetic force and rotationally presses the rotating lever by a magnetic force, and the area where the rotating lever is rotationally pressed by the magnetic force is set to be at least an aperture The rotating area of the rotating rod on the small aperture side of the smaller aperture.
申請專利範圍第5項之發明，係如申請專利範圍第1至3項中任一項之光圈裝置，其中，該一對驅動銷，配置在相對於該轉動桿之旋轉中心而成點對稱的位置，在將該一對驅動銷位於與該光圈葉片的滑動方向直交之直線上時的該直線定為基準線，並使夾隔著該基準線的一側為縮小光圈孔徑的小光圈側，另一側為增大光圈孔徑的大光圈側時，將該驅動銷的轉動區域設定為相對於該基準線而偏倚，使得在該小光圈側從該基準線起的轉動角度範圍，大於在該大光圈側起的該基準線之轉動角度範圍。The invention of claim 5, wherein the pair of driving pins are disposed in point symmetry with respect to a center of rotation of the rotating rod. The straight line when the pair of driving pins are located on a straight line orthogonal to the sliding direction of the diaphragm blade is defined as a reference line, and the side interposed between the reference lines is a small aperture side that reduces the aperture of the aperture, When the other side is the large aperture side of the aperture aperture, the rotation area of the drive pin is set to be biased with respect to the reference line, so that the range of the rotation angle from the reference line on the small aperture side is larger than The range of rotation angle of the reference line from the side of the large aperture.
依據申請專利範圍第1項之發明，因利用步進馬達驅動控制光圈葉片，故可簡單地達成細微的光圈控制。又，因為使減速齒輪機構介設於步進馬達之轉軸與驅動光圈葉片的轉動桿之間，故能以步進馬達之步進分割數以上的解析度細微地調節光圈開度。又，因為將減速機構定為齒輪式而非摩擦輪式，故即使當有衝擊產生作用時，步進馬達與轉動桿的旋轉位置關係亦不虞發生錯位，可發揮耐衝擊性與高可靠度。According to the invention of the first aspect of the patent application, since the diaphragm blade is driven and driven by the stepping motor, fine aperture control can be easily achieved. Further, since the reduction gear mechanism is interposed between the rotation shaft of the stepping motor and the rotation lever that drives the diaphragm blades, the aperture opening degree can be finely adjusted by the resolution of the stepping motor by a step or more. Further, since the speed reduction mechanism is defined as a gear type rather than a friction wheel type, even when an impact is generated, the rotational positional relationship between the stepping motor and the rotation lever does not occur, and impact resistance and high reliability can be exhibited.
又，因為減速齒輪機構係藉由在步進馬達之轉軸安裝的馬達齒輪、與轉動桿形成為一體並與馬達齒輪直接或間接地囓合之內齒輪而構成，故可將步進馬達配置在盡可能靠近轉動桿之旋轉中心的位置。所以，雖使減速齒輪機構介設於步進馬達與轉動桿之間，仍可實現驅動系統之佈局的小型化。Further, since the reduction gear mechanism is constituted by a motor gear mounted on a rotating shaft of the stepping motor, an internal gear integrally formed with the rotating lever and directly or indirectly meshed with the motor gear, the stepping motor can be disposed at the end It may be close to the center of rotation of the rotating rod. Therefore, although the reduction gear mechanism is interposed between the stepping motor and the rotating lever, the layout of the drive system can be miniaturized.
另外，在利用外齒輪與馬達齒輪構成減速齒輪機構時，係將步進馬達配置在遠離轉動桿之旋轉中心的位置。或者，即使在將中間齒輪介設於外齒輪與馬達齒輪之間並將步進馬達配置在盡可能內側(靠近轉動桿之旋轉中心側)時，亦變成中間齒輪相較於轉動桿之旋轉中心更加突出到外側的形式。所以，驅動系統的尺寸容易變大，難以實現小型的佈局。又，因此而易與其他零件發生干涉，難以設計迴避之。就此點而言，本發明使用內齒輪，藉而可增加設計自由度並且實現小型的佈局。Further, when the reduction gear mechanism is constituted by the external gear and the motor gear, the stepping motor is disposed at a position away from the rotation center of the rotation lever. Alternatively, even when the intermediate gear is interposed between the external gear and the motor gear and the stepping motor is disposed as far as possible on the inner side (close to the rotation center side of the rotating lever), it becomes the center of rotation of the intermediate gear compared to the rotating lever. More prominent to the outside form. Therefore, the size of the drive system tends to become large, making it difficult to achieve a small layout. Moreover, it is easy to interfere with other parts, and it is difficult to design to avoid it. In this regard, the present invention uses an internal gear, thereby increasing design freedom and achieving a small layout.
又，在形成內齒輪之環的端面、或靠近該處的位置設置驅動銷，藉而提高驅動銷之支持剛性，並且可增加驅動銷的轉動半徑，達成更大的光圈葉片滑動行程。Further, a driving pin is provided at an end face of the ring forming the internal gear or at a position close thereto, thereby increasing the supporting rigidity of the driving pin, and increasing the radius of rotation of the driving pin to achieve a larger diaphragm blade sliding stroke.
依據申請專利範圍第2項之發明，則可將光圈葉片驅動機構(減速齒輪機構或馬達等)以簡單的方式組裝到光圈基板上。亦即，首先將附設內齒輪的轉動桿安裝到光圈葉片驅動機構安裝部之轉動桿用支持軸，其次將馬達安裝罩蓋組裝到光圈葉片驅動機構安裝部之上。在此基礎上，將馬達齒輪從在馬達安裝罩蓋形成的開口***並直接或間接地囓合於內齒輪，並且將步進馬達安裝到馬達安裝罩蓋。可藉由以上所述而簡單地完成組裝。According to the invention of claim 2, the diaphragm blade drive mechanism (reduction gear mechanism or motor, etc.) can be assembled to the diaphragm substrate in a simple manner. That is, first, the rotation lever with the internal gear is attached to the rotation lever support shaft of the diaphragm blade drive mechanism mounting portion, and second, the motor mounting cover is assembled to the diaphragm blade drive mechanism mounting portion. On this basis, the motor gear is inserted from the opening formed in the motor mounting cover and directly or indirectly meshed with the internal gear, and the stepping motor is mounted to the motor mounting cover. The assembly can be simply accomplished by the above.
依據申請專利範圍第3項之發明，使中間齒輪介設於步進馬達側的馬達齒輪、與轉動桿側的內齒輪之間而獲得更高的減速比，因而可將步進馬達的動作化為更細微的動作而傳達到轉動桿。所以，即使將步進馬達之步進分割數設定為稍微粗略，亦可對光圈葉片細微地進行位置控制，可進行高精度的光圈調節。According to the invention of claim 3, the intermediate gear is interposed between the motor gear on the stepping motor side and the internal gear on the side of the rotating lever to obtain a higher reduction ratio, so that the stepping motor can be operated. Communicated to the rotating rod for more subtle movements. Therefore, even if the stepping number of the stepping motor is set to be slightly rough, the aperture blade can be finely controlled in position, and high-precision aperture adjustment can be performed.
又，因為在光圈基板上設有中間齒輪用支持軸，故可在光圈基板上一併地組裝附設內齒輪的轉動桿與中間齒輪，並可從其上組裝馬達安裝罩蓋，即使有中間齒輪，亦可簡單地進行組裝。Further, since the intermediate shaft support shaft is provided on the diaphragm substrate, the rotating rod and the intermediate gear to which the internal gear is attached can be collectively assembled on the diaphragm substrate, and the motor mounting cover can be assembled therefrom even if there is an intermediate gear It can also be assembled simply.
亦即，雖然難以在光圈基板上設置中間齒輪用支持軸，但藉由在附設內齒輪的轉動桿設置缺口，並以貫穿該缺口的方式而在光圈基板上設置中間齒輪用支持軸，藉此將中間齒輪先行安裝在光圈基板側。藉此，相較於將中間齒輪安裝在馬達安裝罩蓋側時而言，更能達到組裝性的提升。 In other words, it is difficult to provide the intermediate gear support shaft on the diaphragm substrate, but the intermediate gear support shaft is provided on the diaphragm substrate by providing a notch in the rotation lever to which the internal gear is attached, and by inserting the cutout. Install the intermediate gear on the side of the diaphragm substrate. Thereby, the assembly improvement can be achieved more than when the intermediate gear is mounted on the side of the motor mounting cover.
依據申請專利範圍第4項之發明，藉由無背隙機構，可至少在小光圈側的區域中吸收從馬達齒輪至內齒輪的齒輪背隙，因而可在必要區域中進行高精度的光圈調節。又，因為採用磁石與磁性構件作為構成無背隙機構之元件，故能藉由附加非常簡單的構成而達成高精度控制。例如，雖亦考慮以彈簧旋轉推壓附設內齒輪的轉動桿作為無背隙機構，但如此一來則有彈簧之安裝將變得複雑之缺點。就此點而言，在本發明的情況中，只要在小光圈側的區域旋轉推壓附設內齒輪的轉動桿則在性能上即為充足，故採用磁石與磁性構件之組合，並藉此而在簡單的構成下得到充分且必要的性能。 According to the invention of claim 4, by the backlash-free mechanism, the gear backlash from the motor gear to the internal gear can be absorbed at least in the region on the small aperture side, so that high-precision aperture adjustment can be performed in the necessary region. . Further, since the magnet and the magnetic member are used as the elements constituting the backlash-free mechanism, it is possible to achieve high-precision control by adding a very simple configuration. For example, although it is also considered to use a spring to push the rotating lever attached to the internal gear as a backlash-free mechanism, there is a disadvantage that the installation of the spring will become retracted. In this regard, in the case of the present invention, as long as the rotating lever that pushes the internal gear is rotated in the region on the small aperture side, the performance is sufficient, so the combination of the magnet and the magnetic member is employed, and thereby Sufficient and necessary performance is obtained with a simple configuration.
依據申請專利範圍第5項之發明，即使步進馬達的解析度(相當於步進馬達每1步的驅動銷之轉動角度)係相同，亦可細微控制在小光圈側的光圈孔徑。亦即，在令驅動銷的轉動半徑為r、從該基準線起的驅動銷之轉動角度為θ(但θ<90°)時，驅動銷所造成之光圈葉片從該基準線起的移動行程S成為「S=r‧sinθ」。 According to the invention of claim 5, even if the resolution of the stepping motor (corresponding to the rotation angle of the driving pin per step of the stepping motor) is the same, the aperture aperture on the small aperture side can be finely controlled. That is, when the rotational radius of the driving pin is r and the rotational angle of the driving pin from the reference line is θ (but θ < 90°), the moving stroke of the aperture blade caused by the driving pin from the reference line S becomes "S=r‧sinθ".
在此，由「S=r‧sinθ」之算式可知，相對於θ之單位變化量△θ的光圈葉片移動行程之變化量△S，隨θ增大而減小。因△θ之值係步進馬達每1步的驅動銷之轉動角度，故在θ之值大的區域驅動光圈葉片者，可對光圈葉片細微地進行位置控制。本發明為實現此目標，係將驅動銷的轉動區域設定為相對於基準線而偏倚，使得在小光圈側從基準線起的轉動角度範圍，大於在大光圈側從基準線起的轉動角度範圍，並可藉由如此設定方式，以容易的方式達到在必要區域(小光圈區域)之光圈控制的高精度化。 Here, from the equation of "S=r‧sin θ", the amount of change ΔS of the diaphragm blade movement stroke with respect to the unit change amount Δθ of θ decreases as θ increases. Since the value of Δθ is the rotation angle of the driving pin per step of the stepping motor, the aperture blade is driven in a region where the value of θ is large, and the aperture blade can be finely controlled in position. In order to achieve the object, the present invention sets the rotation area of the drive pin to be biased with respect to the reference line such that the range of the rotation angle from the reference line on the small aperture side is larger than the range of the rotation angle from the reference line on the large aperture side. With such a setting, the accuracy of the aperture control in the necessary area (small aperture area) can be achieved in an easy manner.
以下，參照圖式說明本發明之實施形態。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
圖1~圖14係本發明之第1實施形態的光圈裝置之說明圖，圖1係顯示光圈裝置之全體構成的立體分解圖，圖2係顯示同一光圈裝置的主要零件即光圈基板之構成的立體圖，圖3係顯示同樣之零件即轉動桿的構成之立體圖，圖4係顯示在光圈基板上的光圈葉片驅動機構安裝部安裝轉動桿的狀態之立體圖，圖5係顯示在圖4之轉動桿的上側安裝中間齒輪的狀態之立體圖，圖6係顯示在圖5的光圈葉片驅動機構安裝部之上安裝馬達安裝罩蓋的狀態之立體圖，圖7係顯示在圖6的馬達安裝罩蓋之上安裝步進馬達的狀態之立體圖。 1 to 14 are explanatory views of the diaphragm device according to the first embodiment of the present invention, and Fig. 1 is an exploded perspective view showing the entire configuration of the diaphragm device, and Fig. 2 is a view showing the configuration of the diaphragm substrate which is a main component of the same diaphragm device. 3 is a perspective view showing the configuration of the same component, that is, the rotating lever, and FIG. 4 is a perspective view showing a state in which the rotating blade is mounted on the diaphragm blade driving mechanism mounting portion on the diaphragm substrate, and FIG. 5 is a rotating lever shown in FIG. FIG. 6 is a perspective view showing a state in which the motor mounting cover is mounted on the mounting portion of the diaphragm blade driving mechanism of FIG. 5, and FIG. 7 is shown on the motor mounting cover of FIG. A perspective view of the state in which the stepper motor is mounted.
又，圖8係取出光圈葉片之驅動系統的元件並顯示其構成之立體圖，圖9係從光圈葉片之驅動系統的光圈葉片側所見之平面圖，圖10係顯示光圈全開(最大光圈)時的轉動桿之轉動位置與光圈葉片的關係之平面圖，圖11係顯示光圈全關(最小光圈)時的轉動桿之轉動位置與光圈葉片的關係之平面圖，圖12係顯示轉動桿之驅動銷的位置與轉動桿之轉動角度範圍的關係，圖13係顯示本實施形中轉動桿之轉動範圍與比較例中轉動桿之轉動角度範圍的差異，圖14係說明轉動桿之轉動角度範圍相對於基準線在小光圈側與大光圈側的分配之差異所帶來的優點。 8 is a perspective view showing the components of the drive system of the aperture blade, and FIG. 9 is a plan view seen from the side of the aperture blade of the drive system of the aperture blade, and FIG. 10 is a view showing the rotation of the aperture when the aperture is fully opened (maximum aperture). FIG. 11 is a plan view showing the relationship between the rotational position of the rotating rod and the aperture blade when the aperture is fully closed (minimum aperture), and FIG. 12 is a view showing the position of the driving pin of the rotating lever. The relationship between the range of the rotation angle of the rotating lever, FIG. 13 shows the difference between the rotation range of the rotating lever in the present embodiment and the rotation angle range of the rotating lever in the comparative example, and FIG. 14 shows that the rotation angle range of the rotating lever is relative to the reference line. The advantage of the difference between the distribution of the small aperture side and the large aperture side.
如圖1所示，此光圈裝置係由下列各部分構成：略長方形板狀的光圈基板10，由樹脂成形品構成；一對薄膜狀的光圈葉片12、13，在使其彼此疊合的狀態下，以自由直線滑動的方式組裝在此光圈基板10一側的板面上；薄板狀的濾光片15，以可旋轉滑動的方式配置在此2枚光圈葉片12、13之間；葉片蓋14，在將光圈葉片12、13及濾光片15組裝在光圈基板10一側的板面上後，以被覆光圈葉片12、13的方式被覆在光圈基板10上；光圈葉片驅動機構HA及濾光片驅動機構HB，組裝在光圈基板10另一面側。 As shown in Fig. 1, the aperture device is composed of the following parts: a substantially rectangular plate-shaped aperture substrate 10 composed of a resin molded article; and a pair of film-shaped aperture blades 12 and 13 in a state of being overlapped with each other And slidably mounted on the plate surface on the side of the diaphragm substrate 10; the thin plate-shaped filter 15 is rotatably disposed between the two aperture blades 12 and 13; 14. After the diaphragm blades 12 and 13 and the filter 15 are assembled on the plate surface on the diaphragm substrate 10 side, the diaphragm blades 12 and 13 are coated on the diaphragm substrate 10; the diaphragm blade drive mechanism HA and the filter The light sheet driving mechanism HB is assembled on the other surface side of the diaphragm substrate 10.
在光圈基板10及葉片蓋14靠近長邊方向一端的位置，形成有用於形成光路(將圖1之縱軸線定為光軸的光之通路)之開口部11、14a，在光圈基板10的另一端側的位置設有光圈葉片驅動機構安裝部20，在鄰接於該光圈葉片驅動機構安裝部20的光圈基板10之側部，突出設置有濾光片驅動機構安裝部30。Openings 11 and 14a for forming an optical path (a path through which the longitudinal axis of FIG. 1 is defined as an optical axis) are formed at positions at which the aperture substrate 10 and the blade cover 14 are close to one end in the longitudinal direction, and the aperture substrate 10 is formed on the aperture substrate 10 The diaphragm blade drive mechanism attaching portion 20 is provided at one end side, and the filter drive mechanism attaching portion 30 is protruded from a side portion of the diaphragm substrate 10 adjacent to the diaphragm blade drive mechanism attaching portion 20.
另一方面，在光圈葉片12、13設有用於形成光圈開口的缺口狀或孔狀之通孔部12e、13e。並且，藉由在光圈基板10上使光圈葉片12、13在箭頭f1、f2方向彼此往相反方向往復滑動，而可利用該通孔部12e、13e的緣部對光路進行光圈調節。On the other hand, the aperture blades 12 and 13 are provided with through-hole portions 12e and 13e for forming aperture openings or holes. Further, by rotating the diaphragm blades 12 and 13 in opposite directions in the directions of the arrows f1 and f2 on the diaphragm substrate 10, the optical path can be adjusted by the edge of the through hole portions 12e and 13e.
組裝在光圈葉片驅動機構安裝部20的光圈葉片驅動機構HA，係透過設置在轉動桿40的一對驅動銷44a、44b而使光圈葉片12、13滑動者，並以步進馬達110與齒輪減速機構70為中心而構成。此情況的齒輪減速機構70由下列各部分構成：在步進馬達110的轉軸111(參照圖8)安裝的馬達齒輪112；中間齒輪60；後述附設內齒輪的轉動桿40(嚴格而言係內齒輪43)。The diaphragm blade drive mechanism HA assembled in the diaphragm blade drive mechanism mounting portion 20 slides the diaphragm blades 12, 13 through a pair of drive pins 44a, 44b provided on the rotary lever 40, and is decelerated by the stepping motor 110 and the gear. The mechanism 70 is constructed in the center. The gear reduction mechanism 70 in this case is composed of the following parts: a motor gear 112 mounted on the rotating shaft 111 of the stepping motor 110 (refer to FIG. 8); an intermediate gear 60; a rotating lever 40 to which an internal gear is attached, which will be described later (strictly speaking Gear 43).
又，濾光片15具有對應於波長的穿透特性，在此係使用將紅外線區域(含近紅外線區域)之光線遮斷的紅外線濾鏡。在光圈基板10上的濾光片驅動機構安裝部30組裝的濾光片驅動機構HB，因係透過驅動桿121使濾光片15旋轉滑動藉而將濾光片15***到光路上或從光路上移除，故以2位置控制用之致動器120為中心而構成。致動器120藉由濾光片驅動機構安裝部30的底板31(參照圖2)、與在其周圍豎立形成的豎立周壁32而支持。Further, the filter 15 has a transmission characteristic corresponding to a wavelength, and an infrared filter that blocks light in an infrared region (including a near-infrared region) is used here. The filter driving mechanism HB assembled in the filter driving mechanism mounting portion 30 on the diaphragm substrate 10 is configured to insert the filter 15 into the optical path or from the light by rotating the filter 15 through the driving lever 121. Since it is removed on the road, it is constituted by the actuator 120 for 2-position control. The actuator 120 is supported by the bottom plate 31 (see FIG. 2) of the filter driving mechanism mounting portion 30 and the standing peripheral wall 32 formed upright around it.
此情況下的濾光片15係形成為薄膜狀，並***到2枚光圈葉片12、13之微小間隙，以可沿著光圈葉片12、13滑動的方式設置。濾光片15藉由如此夾設於2枚光圈葉片12、13之間，而能以光圈葉片12、13之表面作為導引面而滑順地滑動，可在薄膜狀下進行穩定的插拔動作。The filter 15 in this case is formed in a film shape, and is inserted into a small gap between the two aperture blades 12 and 13, so as to be slidable along the aperture blades 12 and 13. By sandwiching between the two aperture blades 12 and 13 as described above, the filter 15 can smoothly slide the surface of the aperture blades 12 and 13 as a guide surface, and can be stably inserted and removed in the form of a film. action.
濾光片15，將設在曲柄桿部15a之彎曲部的貫通孔15b，嵌合到在光圈基板10之側部耳部突出設置的支軸10a，藉而以此支軸10a為中心並以可沿著光圈葉片12、13之面而轉動的方式受到支持。又，將突出設置在驅動桿121的驅動銷122卡合到在曲柄桿部15a之前端側設置的長孔15c，並驅動致動器120使驅動銷122轉動，藉而使濾光片15以支軸10a為中心而轉動，並可藉此將濾光片15***到光路上或從光路上移除(將濾光片15相對於光路上進行插拔)。The filter 15 is fitted into the through hole 15b provided in the curved portion of the crank lever portion 15a, and fitted to the support shaft 10a projecting from the side portion of the diaphragm substrate 10, whereby the support shaft 10a is centered and It can be supported in such a manner as to rotate along the faces of the aperture blades 12, 13. Further, the driving pin 122 projecting from the driving lever 121 is engaged to the long hole 15c provided on the front end side of the crank lever portion 15a, and the actuator 120 is driven to rotate the driving pin 122, whereby the filter 15 is caused by The support shaft 10a is rotated centrally, and the filter 15 can be inserted into or removed from the optical path (the filter 15 is inserted and removed with respect to the optical path).
又，光圈基板10在圖1中底面的周緣部附近，複數設有導引光圈葉片12、13動作之略去圖示的導引銷。又，在光圈葉片12、13的側緣部附近，以與各側緣部平行的方式設有縱溝12a、12b、12c、13a、13b、13c。並且，將該導引銷嵌合到此等縱溝12a、12b、12c、13a、13b、13c，藉而將光圈葉片12、13保持為在光圈基板10的板面上於箭頭f1、f2方向自由直線滑動。Further, in the vicinity of the peripheral edge portion of the bottom surface in Fig. 1, the diaphragm substrate 10 is provided with a plurality of guide pins which are omitted from the operation of the guide diaphragm blades 12 and 13. Further, longitudinal grooves 12a, 12b, 12c, 13a, 13b, and 13c are provided in the vicinity of the side edge portions of the diaphragm blades 12 and 13 so as to be parallel to the respective side edge portions. Further, the guide pin is fitted into the vertical grooves 12a, 12b, 12c, 13a, 13b, 13c, whereby the diaphragm blades 12, 13 are held in the direction of the arrows f1, f2 on the plate surface of the diaphragm substrate 10. Free to slide in a straight line.
就用於驅動光圈葉片12、13的元件而言，首先在各光圈葉片12、13的長邊方向端部，各自設有在與光圈葉片12、13之滑動方向直交的方向為長的長孔(亦稱為橫溝)12d、13d。此等長孔12d、13d係轉動桿40之驅動銷44a、44b以自由滑動的方式所卡合的部分。又，在光圈葉片驅動機構安裝部20，組裝有轉動桿40、中間齒輪60、馬達安裝罩蓋80及步進馬達110。In the element for driving the diaphragm blades 12 and 13, first, at the end portions in the longitudinal direction of each of the diaphragm blades 12 and 13, each of them is provided with a long hole which is long in a direction orthogonal to the sliding direction of the diaphragm blades 12 and 13. (also known as lateral grooves) 12d, 13d. The long holes 12d and 13d are portions where the drive pins 44a and 44b of the rotary lever 40 are slidably engaged. Further, a rotating lever 40, an intermediate gear 60, a motor mounting cover 80, and a stepping motor 110 are incorporated in the diaphragm blade drive mechanism mounting portion 20.
如圖2所示，光圈葉片驅動機構安裝部20具有約四邊形的底板21與包圍底板21周圍的豎立周壁22，在豎立周壁22頂端面靠近四角的位置，設有用於定位馬達安裝罩蓋80之定位銷23與用於固定馬達安裝罩蓋80之卡爪24，並使同類構造位於對角位置。As shown in FIG. 2, the diaphragm blade drive mechanism mounting portion 20 has a substantially rectangular bottom plate 21 and an upright peripheral wall 22 surrounding the bottom plate 21, and a position for locating the motor mounting cover 80 is provided at a position near the four corners of the top end surface of the upright peripheral wall 22. The locating pin 23 is used to secure the jaws 24 of the motor mounting cover 80 and to have the same configuration in a diagonal position.
又，底板21在圖2中頂面的中心，設立有轉動桿用支持軸25，在其附近設立有中間齒輪用支持軸26。又，在轉動桿用支持軸25周圍的底板21上，設有：止動部突起27，限制轉動桿40之轉動範圍；一對圓弧狀缺口28，使轉動桿40的驅動銷44a、44b穿透到底板21的對側；缺口29，用於供轉動桿40之止脫鉤48卡合(參照圖8、圖9)。Further, the bottom plate 21 is provided with a support shaft 25 for the rotating lever at the center of the top surface of Fig. 2, and an intermediate gear support shaft 26 is provided in the vicinity thereof. Further, on the bottom plate 21 around the support shaft 25 for the rotation lever, there are provided a stopper projection 27 for restricting the rotation range of the rotation lever 40, and a pair of arcuate notches 28 for driving the drive pins 44a, 44b of the rotation lever 40. The penetrating to the opposite side of the bottom plate 21; the notch 29 for engaging the decoupling hook 48 of the rotating lever 40 (refer to Figs. 8 and 9).
轉動桿40，如圖3所示，在內周的一部分範圍具有內齒輪43，並包含：環41，已切除周方向一部分；桿底板42，在該環41的內底部一體化，並在中心部具有與內齒輪43之中心一致的中心孔45；耳部41c、41d，在環41之外周部2處膨脹形成；一對驅動銷44a、44b，突出設置於該耳部41c、41d的一端面(圖3中底端面)。一對驅動銷44a、44b位在離開中心孔45之中心(轉動桿的轉動動線)，並相對於同一中心成點對稱的位置。The rotating lever 40, as shown in FIG. 3, has an internal gear 43 in a part of the inner circumference, and includes a ring 41 which has been partially cut away in the circumferential direction; a rod bottom plate 42 which is integrated at the inner bottom of the ring 41 and is at the center The portion has a center hole 45 that coincides with the center of the internal gear 43; the ear portions 41c, 41d are formed to expand at the outer peripheral portion 2 of the ring 41; a pair of driving pins 44a, 44b projecting from the ear portions 41c, 41d End face (bottom end face in Figure 3). A pair of drive pins 44a, 44b are located at a position away from the center hole 45 (rotational moving line of the rotating lever) and are point-symmetrical with respect to the same center.
又，在已切除圓周方向一部分的環41之兩端，設有止動部壁41a、41b，在桿底板42上靠近內齒輪43的位置，設有用於避免與中間齒輪支持軸26發生干涉的缺口47。又，在桿底板42的底面突出設置有止脫鉤48，用於將此附設內齒輪的轉動桿40止脫卡止在光圈葉片驅動機構安裝部20。Further, at both ends of the ring 41 which has been partially cut away in the circumferential direction, stopper walls 41a, 41b are provided, and at the position of the rod bottom plate 42 close to the internal gear 43, there is provided for avoiding interference with the intermediate gear support shaft 26. Notch 47. Further, a stopper hook 48 is protruded from the bottom surface of the rod bottom plate 42 for locking the rotation lever 40 to which the internal gear is attached to the diaphragm blade drive mechanism mounting portion 20.
並且如圖4所示，將在桿底板42形成的中心孔45，嵌合到在光圈葉片驅動機構安裝部20的底板21之中心突出設置的轉動桿支持軸25，藉而使附設內齒輪的轉動桿40，將自身的轉動軸線朝向直交於光圈基板10的方向，以自由轉動的方式安裝在光圈基板10上。Further, as shown in FIG. 4, the center hole 45 formed in the rod bottom plate 42 is fitted to the rotation lever support shaft 25 which is provided at the center of the bottom plate 21 of the diaphragm blade drive mechanism mounting portion 20, whereby the internal gear is attached. The rotating lever 40 is mounted on the diaphragm substrate 10 in a freely rotatable manner with its own axis of rotation directed in a direction orthogonal to the diaphragm substrate 10.
在此狀態下，如圖8~圖11所示，驅動銷44a、44b各自以自由滑動的方式卡合在光圈葉片13、12的各長孔13d、12d，藉由轉動桿40的轉動，可使光圈葉片12、13彼此往相反方向滑動驅動。In this state, as shown in FIGS. 8 to 11, the drive pins 44a and 44b are slidably engaged with the long holes 13d and 12d of the diaphragm blades 13, 12, respectively, by the rotation of the rotary lever 40. The diaphragm blades 12, 13 are slidably driven in opposite directions from each other.
又，在轉動桿40之底面突出設置的止脫鉤48，以可滑動的方式卡合在光圈葉片驅動機構安裝部20的底板21之缺口29的背面緣部，藉而固定使得轉動桿40在組裝時不會從光圈葉片驅動機構安裝部20脫落。又，在此狀態下，環41兩端的止動部壁41a、41b可抵接於止動部突起27，藉而限制轉動桿40的轉動範圍。又，中間齒輪支持軸26，當轉動桿40在受到轉動限制的範圍內進行轉動時，以不與轉動桿40發生干涉的方式，從在桿底板42形成的缺口47向上突出。Further, the retaining hook 48 projecting from the bottom surface of the rotating lever 40 is slidably engaged with the back edge portion of the notch 29 of the bottom plate 21 of the diaphragm driving mechanism mounting portion 20, thereby being fixed so that the rotating lever 40 is assembled. It does not fall off from the diaphragm blade drive mechanism mounting portion 20. Further, in this state, the stopper portion walls 41a, 41b at both ends of the ring 41 can abut against the stopper projection 27, thereby restricting the range of rotation of the rotation lever 40. Further, the intermediate gear support shaft 26 projects upward from the notch 47 formed in the rod bottom plate 42 so as not to interfere with the rotation lever 40 when the rotation lever 40 is rotated within the range restricted by the rotation.
中間齒輪60係在同一軸線上成一體設有大齒輪61與小齒輪62(參照圖8)者，且如圖5所示，藉由將中心孔66嵌合到該中間齒輪支持軸26，而以自由轉動的方式安裝在光圈基板10上，並在該狀態下使小齒輪62囓合於轉動桿40的內齒輪43。The intermediate gear 60 is integrally provided with a large gear 61 and a pinion 62 (refer to FIG. 8) on the same axis, and as shown in FIG. 5, by fitting the center hole 66 to the intermediate gear support shaft 26, The ring plate 10 is mounted in a freely rotatable manner, and the pinion gear 62 is engaged with the internal gear 43 of the rotating lever 40 in this state.
馬達安裝罩蓋80，在如上所述先行將轉動桿40及中間齒輪60組裝後，以被覆轉動桿40及中間齒輪60的方式，如圖6所示，安裝在光圈葉片驅動機構安裝部20之上，並發揮齒輪箱蓋之功能。The motor mounting cover 80 is assembled to the diaphragm blade driving mechanism mounting portion 20 as shown in FIG. 6 by assembling the rotating lever 40 and the intermediate gear 60 as described above. Up and play the function of the gearbox cover.
馬達安裝罩蓋80具有同光圈葉片驅動機構安裝部20的豎立周壁22之大小的罩蓋主板81，在該罩蓋主板81的頂面，突出設置有圓筒狀的馬達安裝壁82與電路板安裝壁88。圓筒狀的馬達安裝壁82係在180°相對的位置具有缺口者，在該缺口的位置設有馬達固定用的鎖定片85。又，在藉由圓筒狀的馬達安裝壁82所包圍之罩蓋主板81上的部分，設有用於***步進馬達110之馬達齒輪112的開口86。The motor mounting cover 80 has a cover main plate 81 of the same size as the vertical peripheral wall 22 of the diaphragm drive mechanism mounting portion 20, and a cylindrical motor mounting wall 82 and a circuit board are protruded from the top surface of the cover main plate 81. Mounting wall 88. The cylindrical motor mounting wall 82 has a notch at a position opposite to 180°, and a locking piece 85 for fixing the motor is provided at the position of the notch. Further, an opening 86 for inserting the motor gear 112 of the stepping motor 110 is provided in a portion of the cover main plate 81 surrounded by the cylindrical motor mounting wall 82.
又，在罩蓋主板81頂面不妨礙馬達安裝的位置設有收線夾83。收線夾83係包圍電線收納部83a的略成口字形框狀之物，當穿過基端附近的缺口83b而將電線放入電線收納部83a時，可藉由止脫片83c保持使電線不脫出。Further, a take-up clip 83 is provided at a position where the top surface of the cover main plate 81 does not interfere with the mounting of the motor. The wire take-up clip 83 is a substantially hat-shaped frame-shaped object that surrounds the wire accommodating portion 83a. When the wire is placed in the wire accommodating portion 83a through the notch 83b near the base end, the wire can be held by the stopper piece 83c. Do not come out.
此馬達安裝罩蓋80，藉由將光圈葉片驅動機構安裝部20側之定位用銷23，嵌合到在罩蓋主板81的底面側形成之未圖示的定位孔而正確地定位，並且，藉由將光圈葉片驅動機構安裝部20側的卡爪24卡合到在罩蓋主板81開口的鎖定孔84，而以精度良好的方式安裝在光圈葉片驅動機構安裝部20。The motor attachment cover 80 is fitted to the positioning hole (not shown) formed on the bottom surface side of the cover main plate 81 by the positioning pin 23 on the diaphragm blade drive mechanism mounting portion 20 side, and is accurately positioned. By engaging the claw 24 on the diaphragm blade drive mechanism mounting portion 20 side with the lock hole 84 opened in the cover main plate 81, the diaphragm blade drive mechanism attaching portion 20 is attached with high precision.
並且，如圖7所示，在此馬達安裝罩蓋80的馬達安裝壁82之內部安裝有步進馬達110，使轉軸111(參照圖8)朝向直交於光圈基板10的方向。步進馬達110係在圓筒狀的外殼內部收納旋轉機構部者，並在從外殼端面突出的轉軸111安裝有馬達齒輪112。又，外殼在轉軸111側之端部設有安裝托架113，在外殼的側部安裝有電路板115，其中，該安裝托架113具有鎖定片85所卡合之溝部113a。Further, as shown in FIG. 7, a stepping motor 110 is attached to the inside of the motor mounting wall 82 of the motor mounting cover 80, and the rotating shaft 111 (see FIG. 8) is directed in a direction orthogonal to the diaphragm substrate 10. The stepping motor 110 accommodates the rotating mechanism portion inside the cylindrical casing, and the motor gear 112 is attached to the rotating shaft 111 that protrudes from the end surface of the casing. Further, a mounting bracket 113 is provided at an end portion of the outer casing on the side of the rotating shaft 111, and a circuit board 115 is attached to a side portion of the outer casing. The mounting bracket 113 has a groove portion 113a to which the locking piece 85 is engaged.
在如此將步進馬達110安裝到馬達安裝罩蓋80的狀態下，在安裝托架113的溝部113a卡合有鎖定片85。又，電路板115保持在電路板安裝壁88。又，穿過在馬達安裝罩蓋80形成的開口86，將安裝在步進馬達110之轉軸111的馬達齒輪112***到馬達安裝罩蓋80內側，該馬達齒輪112如圖8所示，在馬達安裝罩蓋80內側囓合於中間齒輪60的大齒輪61。In the state in which the stepping motor 110 is attached to the motor mounting cover 80 as described above, the locking piece 85 is engaged with the groove portion 113a of the mounting bracket 113. Again, the circuit board 115 remains on the board mounting wall 88. Further, the motor gear 112 mounted on the rotating shaft 111 of the stepping motor 110 is inserted into the inside of the motor mounting cover 80 through the opening 86 formed in the motor mounting cover 80, which is shown in FIG. The inside of the mounting cover 80 is engaged with the large gear 61 of the intermediate gear 60.
因此，從構成齒輪減速機構70的馬達齒輪112輸入之驅動力，透過中間齒輪60的大齒輪61及小齒輪62而傳達到內齒輪43，使得轉動桿40轉動。 Therefore, the driving force input from the motor gear 112 constituting the gear reduction mechanism 70 is transmitted to the internal gear 43 through the large gear 61 and the pinion gear 62 of the intermediate gear 60, so that the rotation lever 40 rotates.
另，如圖1所示，從步進馬達110的電路板115延伸有電線116，在該電線116的前端附設連接器117。同樣地，在濾光片驅動用的致動器120附設電路板125，在從該電路板125延伸之電線126的前端附設連接器127。 Further, as shown in FIG. 1, a wire 116 is extended from the circuit board 115 of the stepping motor 110, and a connector 117 is attached to the tip end of the wire 116. Similarly, a circuit board 125 is attached to the actuator 120 for filter driving, and a connector 127 is attached to the front end of the electric wire 126 extending from the circuit board 125.
又，在此光圈裝置設有無背隙機構，藉由將附設內齒輪的轉動桿40往單方向旋轉推壓，而吸收內齒輪43與馬達齒輪112之間的齒輪背隙。此無背隙機構由磁石50與磁性銷(磁性構件)51構成，該磁石50與磁性銷(磁性構件)51彼此使磁吸力相互作用，並藉由該磁吸力旋轉推壓轉動桿40，在馬達安裝罩蓋80的內面側安裝有磁石50，在轉動桿40之耳部41d形成的銷孔49***固定有磁性銷51。 Further, the aperture device is provided with a backlash-free mechanism, and the gear backlash between the internal gear 43 and the motor gear 112 is absorbed by the rotation of the rotating lever 40 to which the internal gear is attached in one direction. The backlash-free mechanism is composed of a magnet 50 and a magnetic pin (magnetic member) 51. The magnet 50 and the magnetic pin (magnetic member) 51 mutually interact with magnetic attraction, and the rotary rod 40 is pressed by the magnetic force. A magnet 50 is attached to the inner surface side of the motor mounting cover 80, and a magnetic pin 51 is inserted and fixed to the pin hole 49 formed in the ear portion 41d of the rotating lever 40.
此時，將藉由磁力而旋轉推壓轉動桿40之區域設定為：至少為光圈孔徑較小的小光圈側之轉動桿40的轉動區域。亦即，如圖11所示，以小光圈階段中在磁石50與磁性銷51之間有必要的磁吸力Q產生作用的方式，設定磁石50與磁性銷51的位置關係。 At this time, the region where the rotating lever 40 is rotationally pressed by the magnetic force is set to be at least the rotating region of the rotating lever 40 on the small aperture side where the aperture aperture is small. That is, as shown in FIG. 11, the positional relationship between the magnet 50 and the magnetic pin 51 is set such that the magnetic attraction force Q required between the magnet 50 and the magnetic pin 51 acts in the small aperture stage.
又，在此光圈裝置中，如圖10、圖11所示，在將一對驅動銷44a、44b位於與光圈葉片12、13的滑動方向直交之直線上時的該直線定為基準線K，並使夾隔著該基準線K的一側為縮小光圈孔徑的小光圈側(圖11之θ2的範圍)，另一側為增大光圈孔徑的大光圈側(圖10之θ1的範圍)時，將驅動銷44a、44b的轉動區域如圖12所示，設定為相對於基準線K而偏倚，使得在小光圈側(閉側)從基準線K起的轉動角度範圍θ2大於在大光圈側(開側)從基準線K起的轉動角度範圍θ1。因此，從基準線K起的光圈葉片12、13之行程，亦變成在小光圈側從基準線K起的行程S2大於在大光圈側從基準線K起的行程S1。另，在圖12中，O係驅動銷44a(44b亦同)之轉動中心，R係驅動銷44a之轉動軌跡。 Further, in the aperture device, as shown in FIGS. 10 and 11, the straight line when the pair of drive pins 44a and 44b are positioned on a straight line orthogonal to the sliding direction of the diaphragm blades 12 and 13 is defined as the reference line K. The side on which the reference line K is interposed is the small aperture side (the range of θ2 in FIG. 11) in which the aperture of the aperture is reduced, and the other side is on the large aperture side (the range of θ1 in FIG. 10) in which the aperture of the aperture is increased. The rotation area of the drive pins 44a, 44b is set to be biased with respect to the reference line K as shown in FIG. 12, so that the rotation angle range θ2 from the reference line K on the small aperture side (closed side) is larger than on the large aperture side. (open side) a rotation angle range θ1 from the reference line K. Therefore, the stroke of the diaphragm blades 12, 13 from the reference line K also becomes that the stroke S2 from the reference line K on the small aperture side is larger than the stroke S1 from the reference line K on the large aperture side. Further, in Fig. 12, the O system drives the rotation center of the pin 44a (the same as 44b), and the R system drives the rotation locus of the pin 44a.
藉由如此設定驅動銷44a、44b的轉動區域，即使步進馬達110的解析度(相當於步進馬達每一步的驅動銷44a、44b之轉動角度) 係相同，亦可在小光圈側對光圈孔徑細微地進行控制。以下說明此點。 By setting the rotation regions of the drive pins 44a, 44b in this way, even the resolution of the stepping motor 110 (corresponding to the rotation angle of the drive pins 44a, 44b of each step of the stepping motor) The same is true, and the aperture diameter can be finely controlled on the small aperture side. This is explained below.
在令驅動銷44a的轉動半徑為r，從該基準線K起的驅動銷44a之轉動角度為θ(但θ<90°)時，驅動銷44a造成之光圈葉片12、13從該基準線K起的移動行程S成為S=r‧sinθ。 When the rotational radius of the drive pin 44a is r, and the rotational angle of the drive pin 44a from the reference line K is θ (but θ < 90°), the aperture blades 12, 13 caused by the drive pin 44a are from the reference line K. The moving stroke S becomes S=r‧sin θ.
在此，由S=r‧sinθ之算式可知，相對於θ之單位變化量△θ的光圈葉片移動行程之變化量△S，隨θ增大而減小。因△θ之值係步進馬達每一步的驅動銷44a之轉動角度，故在θ之值大的區域驅動光圈葉片12、13者，可對光圈葉片12、13細微地進行位置控制。 Here, from the equation of S=r‧sin θ, the amount of change ΔS of the diaphragm blade movement stroke with respect to the unit change amount Δθ of θ decreases as θ increases. Since the value of Δθ is the rotation angle of the drive pin 44a at each step of the stepping motor, the aperture blades 12 and 13 are driven in a region where the value of θ is large, and the aperture blades 12 and 13 can be finely controlled in position.
在本實施形態的光圈裝置中，為實現此目標，係將驅動銷44a的轉動區域設定為相對於基準線K而偏倚，使得在小光圈側從基準線K起的轉動角度範圍θ2大於在大光圈側從基準線K起的轉動角度範圍θ1，並可藉由如此設定方式，以容易的方式達到在必要區域(小光圈區域)之光圈控制的高精度化。 In the aperture device of the present embodiment, in order to achieve this, the rotational region of the drive pin 44a is set to be biased with respect to the reference line K such that the range of the rotational angle θ2 from the reference line K on the small aperture side is larger than that in the large aperture side. The range of the rotation angle of the aperture side from the reference line K is θ1, and by such a setting, the accuracy of the aperture control in the necessary region (small aperture region) can be easily achieved.
圖13係顯示驅動銷在(a)本實施形態下(b)比較例下的轉動角度範圍。在(b)之比較例的情況下，在小光圈側(閉側)從基準線K起的轉動角度範圍θb與在大光圈側(開側)從基準線K起的轉動角度範圍θb設定為相等。 Fig. 13 is a view showing a range of rotation angles of the driving pin in (a) the comparative example (b) of the present embodiment. In the case of the comparative example of (b), the rotation angle range θb from the reference line K on the small aperture side (closed side) and the rotation angle range θb from the reference line K on the large aperture side (open side) are set to equal.
當如此設定時，光圈葉片12、13無論在小光圈側或大光圈側，僅可從基準線K起移動相同的行程Sb，而在小光圈側與大光圈側以相同條件驅動。 When set in this way, the diaphragm blades 12 and 13 can be driven by the same stroke Sb only from the reference line K and on the large aperture side and the large aperture side, regardless of the small aperture side or the large aperture side.
相對於此，在如(a)所示，使驅動銷44a全體的轉動角度範圍幾乎無改變，並使轉動角度範圍平移到小光圈側之本實施形態的情況下，如圖14所示，在小光圈側與大光圈側以相同條件驅動的範圍θ1(光圈葉片之行程N1)的外側，可在小光圈側設定特有的驅動範圍θ3(相當於光圈葉片的行程之N3的部分)。此範圍θ3因為屬於先前算式S=r‧sinθ之θ較大的區域，故△S相應於△θ而變小。亦即，即使以相同步進角度轉動驅動銷44a，光圈葉片的位移量△S亦變小。所以，可進行高精度的定位控制。On the other hand, as shown in (a), when the range of the rotation angle of the entire drive pin 44a is hardly changed and the range of the rotation angle is shifted to the small aperture side, as shown in FIG. On the outer side of the range θ1 (the stroke N1 of the diaphragm blade) that is driven by the same condition on the small aperture side and the large aperture side, a specific drive range θ3 (corresponding to the portion of the stroke of the aperture blade N3) can be set on the small aperture side. Since this range θ3 belongs to a region where θ of the previous formula S=r‧sin θ is large, ΔS becomes smaller corresponding to Δθ. That is, even if the driving pin 44a is rotated at the same step angle, the displacement amount ΔS of the diaphragm blade becomes small. Therefore, high-precision positioning control can be performed.
如以上所述，依據本實施形態之光圈裝置，因為利用步進馬達110驅動控制光圈葉片12、13，故能以簡單的方式進行細微的光圈控制。又，因為使減速齒輪機構70介設於步進馬達110的轉軸111與驅動光圈葉片12、13的轉動桿40之間，故能以步進馬達110之步進分割數以上的解析度細微地調節光圈開度。又，因為將減速機構定為齒輪式而非摩擦輪式，故在有衝擊產生作用時，步進馬達110與轉動桿40之旋轉位置關係亦不虞發生錯位，可發揮耐衝擊性與高可靠度。As described above, according to the aperture device of the present embodiment, since the diaphragm blades 12 and 13 are driven and driven by the stepping motor 110, fine aperture control can be performed in a simple manner. Further, since the reduction gear mechanism 70 is interposed between the rotating shaft 111 of the stepping motor 110 and the rotating lever 40 of the driving diaphragm blades 12 and 13, the resolution of the stepping motor 110 can be divided by several or more finely. Adjust the aperture opening. Further, since the speed reduction mechanism is defined as a gear type rather than a friction wheel type, when the impact is generated, the rotational positional relationship between the stepping motor 110 and the rotating rod 40 is not misaligned, and impact resistance and high reliability can be exhibited. .
又，減速齒輪機構70係藉由下列各部分構成：馬達齒輪112，安裝在步進馬達110的轉軸111；內齒輪43，與轉動桿40形成為一體並與馬達齒輪112透過中間齒輪60而囓合；因而，可將步進馬達110配置在盡可能靠近轉動桿40之旋轉中心的位置。所以，雖使減速齒輪機構70介設於步進馬達110與轉動桿40之間，仍可實現驅動系統之佈局的小型化。Further, the reduction gear mechanism 70 is constituted by the following parts: a motor gear 112, which is mounted on the rotating shaft 111 of the stepping motor 110, and an internal gear 43 which is integrally formed with the rotating lever 40 and meshed with the motor gear 112 through the intermediate gear 60. Thus, the stepping motor 110 can be disposed as close as possible to the center of rotation of the rotating lever 40. Therefore, even if the reduction gear mechanism 70 is interposed between the stepping motor 110 and the rotating lever 40, the layout of the drive system can be miniaturized.
另外，在藉由外齒輪與馬達齒輪構成減速齒輪機構時，係將步進馬達配置在遠離轉動桿之旋轉中心的位置。或者，即使在將中間齒輪介設於外齒輪與馬達齒輪之間並將步進馬達配置在盡可能內側(靠近轉動桿之旋轉中心側)時，亦變成中間齒輪相較於轉動桿的旋轉中心更加突出到外側的形式。所以，驅動系統的尺寸容易變大，難以實現小型的佈局。又，因此而易與其他零件發生干涉，難以設計迴避之。就此點而言，本實施形態之光圈裝置使用內齒輪43，藉而可增加設計自由度並且實現小型的佈局。Further, when the reduction gear mechanism is constituted by the external gear and the motor gear, the stepping motor is disposed at a position away from the rotation center of the rotation lever. Alternatively, even when the intermediate gear is interposed between the external gear and the motor gear and the stepping motor is disposed as far as possible on the inner side (near the rotation center side of the rotating lever), it becomes the center of rotation of the intermediate gear relative to the rotating lever. More prominent to the outside form. Therefore, the size of the drive system tends to become large, making it difficult to achieve a small layout. Moreover, it is easy to interfere with other parts, and it is difficult to design to avoid it. In this regard, the aperture device of the present embodiment uses the internal gear 43, thereby increasing design freedom and achieving a small layout.
又，因為在形成內齒輪43的環41之靠近端面的位置設有驅動銷44a、44b，故提高驅動銷44a、44b的支持剛性，並且可增加驅動銷44a、44b的轉動半徑，可使光圈葉片12、13的滑動行程增加。Further, since the drive pins 44a, 44b are provided at positions close to the end faces of the ring 41 forming the internal gear 43, the support rigidity of the drive pins 44a, 44b is increased, and the radius of rotation of the drive pins 44a, 44b can be increased to make the aperture The sliding stroke of the blades 12, 13 is increased.
又，本實施形態的光圈裝置，首先將附設內齒輪的轉動桿40安裝在光圈葉片驅動機構安裝部20的轉動桿用支持軸25，其次將中間齒輪60安裝在中間齒輪用支持軸26，繼而將馬達安裝罩蓋80組裝在光圈葉片驅動機構安裝部20之上，從其上方，將馬達齒輪112從在馬達安裝罩蓋80形成的開口86***並囓合於中間齒輪60，並且將步進馬達110安裝在馬達安裝罩蓋80，藉而可簡單地完成組裝。Further, in the aperture device of the present embodiment, first, the rotation lever 40 to which the internal gear is attached is attached to the rotation lever support shaft 25 of the diaphragm blade drive mechanism mounting portion 20, and then the intermediate gear 60 is attached to the intermediate gear support shaft 26, and then The motor mounting cover 80 is assembled on the diaphragm blade drive mechanism mounting portion 20, from above, the motor gear 112 is inserted from the opening 86 formed in the motor mounting cover 80 and engaged with the intermediate gear 60, and the stepping motor The 110 is mounted to the motor mounting cover 80 so that assembly can be easily accomplished.
又，在本實施形態的光圈裝置中，使中間齒輪60介設於步進馬達110側的馬達齒輪112與轉動桿40側的內齒輪43之間而獲得較大的減速比，因而可將步進馬達110的動作化為細微的動作而傳達到轉動桿40。所以，即使將步進馬達110的步進分割數設定為稍微粗略，亦可對光圈葉片12、13細微地進行位置控制，可進行高精度的光圈調節。Further, in the aperture device of the present embodiment, the intermediate gear 60 is interposed between the motor gear 112 on the stepping motor 110 side and the internal gear 43 on the side of the rotating lever 40 to obtain a large reduction ratio, so that the intermediate gear 60 can be stepped. The operation of the intake motor 110 is transmitted to the rotating lever 40 in a minute motion. Therefore, even if the number of step divisions of the stepping motor 110 is set to be slightly rough, the aperture blades 12 and 13 can be finely controlled in position, and high-precision aperture adjustment can be performed.
又，因為在光圈基板10上設有中間齒輪用支持軸26，故可在光圈基板10上將中間齒輪60與附設內齒輪的轉動桿40一併地組裝，並在此基礎上組裝馬達安裝罩蓋80，即使有中間齒輪60，亦可簡單地進行組裝。Further, since the intermediate gear support shaft 26 is provided on the diaphragm substrate 10, the intermediate gear 60 can be assembled together with the rotary lever 40 to which the internal gear is attached on the diaphragm substrate 10, and the motor mounting cover can be assembled thereon. The cover 80 can be easily assembled even if the intermediate gear 60 is provided.
亦即，雖難以在光圈基板10上設置中間齒輪用支持軸26，但藉由在附設內齒輪的轉動桿40設置缺口47，並以貫穿該缺口47的方式，在光圈基板10上設置中間齒輪用支持軸26，藉此將中間齒輪60先行安裝在光圈基板10側。藉此，相較於將中間齒輪60安裝在馬達安裝罩蓋80側時而言，更能達到組裝性的提升。In other words, although it is difficult to provide the intermediate gear support shaft 26 on the diaphragm substrate 10, the intermediate gear is provided on the diaphragm substrate 10 by providing the notch 47 in the rotating lever 40 to which the internal gear is attached and by penetrating the notch 47. The support shaft 26 is used, whereby the intermediate gear 60 is attached to the diaphragm substrate 10 side in advance. Thereby, the assembly property can be improved more than when the intermediate gear 60 is attached to the side of the motor mounting cover 80.
又，在此光圈裝置中，利用由磁石50與磁性銷51構成的無背隙機構，至少在小光圈側的區域中，吸收從馬達齒輪112至內齒輪43的齒輪背隙，因而可在必要區域(尤其是小光圈側)中進行高精度的光圈調節。Further, in the aperture device, the backlash mechanism composed of the magnet 50 and the magnetic pin 51 absorbs the gear backlash from the motor gear 112 to the internal gear 43 at least in the region on the small aperture side, so that it is necessary High-precision aperture adjustment is performed in the area (especially on the small aperture side).
又，因為採用磁石50與磁性銷51作為構成無背隙機構之元件，故能藉由附加非常簡單的構成而達到高精度控制。例如，雖考慮以彈簧旋轉推壓附設內齒輪的轉動桿作為無背隙機構，但如此一來將有彈簧的安裝變得複雑之缺點。就此點而言，在本實施形態的光圈裝置之情況，只要在小光圈側的區域旋轉推壓附設內齒輪的轉動桿40則在性能上即為充足，故採用磁石50與磁性銷51之組合，並藉此而在簡單的構成下得到充分且必要的性能。Further, since the magnet 50 and the magnetic pin 51 are used as the elements constituting the backlash-free mechanism, high-precision control can be achieved by adding a very simple configuration. For example, although it is considered to push the rotating lever to which the internal gear is attached by the rotation of the spring as the backlash-free mechanism, the installation of the spring becomes a disadvantage. In this regard, in the case of the aperture device of the present embodiment, as long as the rotation lever 40 to which the internal gear is attached is rotatably pressed in the region on the small aperture side, the performance is sufficient, so the combination of the magnet 50 and the magnetic pin 51 is employed. And by this, sufficient and necessary performance is obtained with a simple configuration.
又，藉由將驅動銷44a、44b的轉動角度範圍設定為在小光圈側與大光圈側偏倚，如上所述，即使步進馬達110的解析度係相同，亦可在小光圈側對光圈孔徑細微地進行控制。Further, by setting the range of the rotational angle of the drive pins 44a and 44b to be small on the small aperture side and the large aperture side, as described above, even if the resolution of the stepping motor 110 is the same, the aperture aperture can be made on the small aperture side. Control it subtly.
又，藉由如以上所述提高在小光圈側之光圈調節的解析度，亦可得到以下的優點。亦即，在多種此類光圈裝置中，為了提高在小光圈側之光量調節的解析度，而在光圈葉片的一部分貼裝有ND濾光片(減光片)。此ND濾光片其本身係昂貴，此外亦必須以精度良好的方式貼裝在光圈葉片的表面，因而成為光圈裝置全體之成本增加的要因。Further, by improving the resolution of the aperture adjustment on the small aperture side as described above, the following advantages can be obtained. That is, in many such aperture devices, in order to improve the resolution of the light amount adjustment on the small aperture side, an ND filter (light reduction sheet) is attached to a part of the aperture blade. This ND filter is expensive in itself, and must be attached to the surface of the diaphragm blade with high precision, and thus becomes a factor for increasing the cost of the entire aperture device.
但是，在本實施形態的光圈裝置中，使用步進馬達110，使用齒輪減速機構70，更設有除去小光圈時齒輪背隙的機構，又將驅動銷的轉動角度範圍平移到小光圈側，藉由此等方式可使在小光圈側的解析度更上一層。所以，藉此，可如本實施形態的方式而捨棄使用ND濾光片。亦即，即使不使用ND濾光片，亦可確保必要的小光圈側之光圈葉片的控制解析度。因此，不需要昂貴的ND濾光片，而且剔除將ND濾光片往光圈葉片安裝之要求高精度的作業，可藉此而對於成本降低及生產性之提升有所貢獻。However, in the aperture device of the present embodiment, the stepping motor 110 is used, and the gear reduction mechanism 70 is used. Further, a mechanism for removing the gear backlash when the small aperture is removed is provided, and the range of the rotation angle of the drive pin is shifted to the small aperture side. By this way, the resolution on the small aperture side can be further improved. Therefore, by using the ND filter, the ND filter can be discarded as in the embodiment. That is, even if the ND filter is not used, the necessary control resolution of the aperture diaphragm on the small aperture side can be ensured. Therefore, an expensive ND filter is not required, and the high-precision operation of mounting the ND filter to the aperture blade is eliminated, thereby contributing to cost reduction and productivity improvement.
另，在上述實施形態中雖將磁石50設置在固定側、將磁性銷51設置在可動側，但磁石50與磁性銷51亦可相反設置。亦即，也可將磁石50設置在轉動桿40側、將磁性銷等磁性構件設置在光圈基板10或馬達安裝罩蓋80等固定側。又，亦可利用磁石構成磁性構件。Further, in the above embodiment, the magnet 50 is provided on the fixed side and the magnetic pin 51 is provided on the movable side, but the magnet 50 and the magnetic pin 51 may be provided oppositely. In other words, the magnet 50 may be provided on the side of the rotating lever 40, and a magnetic member such as a magnetic pin may be provided on the fixed side such as the diaphragm substrate 10 or the motor mounting cover 80. Further, the magnetic member may be formed of a magnet.
又，上述實施形態雖顯示在齒輪減速機構70設置中間齒輪60之例，但亦可省略中間齒輪，並使步進馬達110側的馬達齒輪112直接地囓合於轉動桿40的內齒輪43。Further, in the above embodiment, the intermediate gear 60 is provided in the gear reduction mechanism 70. However, the intermediate gear may be omitted, and the motor gear 112 on the stepping motor 110 side may be directly meshed with the internal gear 43 of the rotating lever 40.
圖15~圖18係不使用中間齒輪之第2實施形態的光圈裝置之構成圖，且圖15係顯示全體構成之立體分解圖，圖16係顯示在光圈基板上的光圈葉片驅動機構安裝部安裝轉動桿之狀態的立體圖，圖17係顯示在圖16的光圈葉片驅動機構安裝部之上安裝馬達安裝罩蓋的狀態之立體圖，圖18係顯示在圖17的馬達安裝罩蓋之上安裝步進馬達的狀態之立體圖。15 to 18 are views showing a configuration of a diaphragm device according to a second embodiment in which the intermediate gear is not used, and Fig. 15 is an exploded perspective view showing the entire configuration, and Fig. 16 is a view showing mounting of the diaphragm blade drive mechanism on the diaphragm substrate. FIG. 17 is a perspective view showing a state in which the motor mounting cover is attached to the mounting portion of the diaphragm driving mechanism of FIG. 16, and FIG. 18 is a step showing the mounting of the motor mounting cover of FIG. A perspective view of the state of the motor.
與上述第1實施形態之差異係如下：因為無中間齒輪，故在光圈基板210的光圈葉片驅動機構安裝部220沒有中間齒輪用支軸；因為直接使馬達齒輪112囓合於轉動桿40之內齒輪43的關係，故步進馬達110的安裝位置有所變更；馬達安裝罩蓋280的形狀隨之而有所變更。此外之點係與第1實施形態完全地相同構成，同一構成元件標註同一符號並省略其說明。The difference from the above-described first embodiment is as follows: since the intermediate gear is not provided, the diaphragm drive mechanism mounting portion 220 of the diaphragm substrate 210 has no intermediate gear support shaft; since the motor gear 112 is directly engaged with the internal gear of the rotary lever 40 With the relationship of 43, the mounting position of the stepping motor 110 is changed; the shape of the motor mounting cover 280 is changed accordingly. The same components as those of the first embodiment are completely the same, and the same components are denoted by the same reference numerals, and their description is omitted.
在如此省略中間齒輪時，因為減速齒輪機構的減速比變小，故光圈葉片的位置控制之精度稍微變得粗略，可藉由提升步進馬達110之解析度而彌補無中間齒輪所造成的精度粗糙。When the intermediate gear is omitted in this way, since the reduction ratio of the reduction gear mechanism becomes small, the accuracy of the position control of the aperture blade is slightly roughened, and the accuracy caused by the intermediate gear can be compensated for by improving the resolution of the stepping motor 110. Rough.
10．．．光圈基板10. . . Aperture substrate
10a．．．支軸10a. . . Support shaft
11、14a．．．開口部11, 14a. . . Opening
12、13．．．光圈葉片12, 13. . . Aperture blade
12a、12b、12c．．．縱溝12a, 12b, 12c. . . Longitudinal groove
13a、13b、13c．．．縱溝13a, 13b, 13c. . . Longitudinal groove
12d、13d．．．長孔(橫溝)12d, 13d. . . Long hole
12e、13e．．．通孔部12e, 13e. . . Through hole
14．．．葉片蓋14. . . Blade cover
15．．．濾光片15. . . Filter
15a．．．曲柄桿部15a. . . Crank section
15b．．．貫通孔15b. . . Through hole
15c．．．長孔15c. . . Long hole
20．．．光圈葉片驅動機構安裝部20. . . Aperture blade drive mechanism mounting section
21．．．底板twenty one. . . Bottom plate
22．．．豎立周壁twenty two. . . Erecting the perimeter wall
23．．．定位銷twenty three. . . Locating pin
24．．．卡爪twenty four. . . Claw
25．．．轉動桿用支持軸(轉動桿支持軸)25. . . Support shaft for rotating rod (rotating rod support shaft)
26．．．中間齒輪用支持軸(中間齒輪支持軸)26. . . Support shaft for intermediate gear (intermediate gear support shaft)
27．．．止動部突起27. . . Stop protrusion
28．．．圓弧狀缺口28. . . Arc-shaped gap
29．．．缺口29. . . gap
30．．．濾光片驅動機構安裝部30. . . Filter drive mechanism mounting section
31．．．底板31. . . Bottom plate
32．．．豎立周壁32. . . Erecting the perimeter wall
40．．．轉動桿40. . . Rotating lever
41．．．環41. . . ring
41a、41b．．．止動部壁41a, 41b. . . Stop wall
41c、41d．．．耳部41c, 41d. . . Ear
42．．．桿底板42. . . Rod bottom plate
43．．．內齒輪43. . . Internal gear
44a、44b．．．驅動銷44a, 44b. . . Drive pin
45．．．中心孔45. . . Center hole
47．．．缺口47. . . gap
48．．．止脫鉤48. . . Decoupling
49．．．銷孔49. . . Pin hole
50．．．磁石50. . . magnet
51．．．磁性銷(磁性構件)51. . . Magnetic pin (magnetic member)
60．．．中間齒輪60. . . Intermediate gear
61．．．大齒輪61. . . big gear
62．．．小齒輪62. . . gear
66．．．中心孔66. . . Center hole
70．．．齒輪減速機構70. . . Gear reduction mechanism
80．．．馬達安裝罩蓋80. . . Motor mounting cover
81．．．罩蓋主板81. . . Cover motherboard
82．．．馬達安裝壁82. . . Motor mounting wall
83．．．收線夾83. . . Clip
83a．．．電線收納部83a. . . Wire storage unit
83b．．．缺口83b. . . gap
83c．．．止脫片83c. . . Stop film
84．．．鎖定孔84. . . Locking hole
85．．．鎖定片85. . . Locking piece
86．．．開口86. . . Opening
88．．．電路板安裝壁88. . . Board mounting wall
110．．．步進馬達110. . . Stepper motor
111．．．轉軸111. . . Rotating shaft
112．．．馬達齒輪112. . . Motor gear
113．．．托架113. . . bracket
113a．．．溝部113a. . . Ditch
115、125．．．電路板115, 125. . . Circuit board
116、126．．．電線116, 126. . . wire
117、127．．．連接器117, 127. . . Connector
120．．．致動器120. . . Actuator
121．．．驅動桿121. . . Drive rod
122．．．驅動銷122. . . Drive pin
210．．．光圈基板210. . . Aperture substrate
220．．．光圈葉片驅動機構安裝部220. . . Aperture blade drive mechanism mounting section
280．．．馬達安裝罩蓋280. . . Motor mounting cover
f1、f2．．．箭頭方向F1, f2. . . Arrow direction
K．．．基準線K. . . Baseline
HA．．．光圈葉片驅動機構HA. . . Aperture blade drive mechanism
HB．．．濾光片驅動機構HB. . . Filter drive mechanism
N1、N3．．．行程N1, N3. . . stroke
O．．．轉動中心O. . . Rotation center
Q．．．磁吸力Q. . . Magnetic attraction
R．．．轉動軌跡R. . . Rotation track
r．．．轉動半徑r. . . Radius of rotation
S、S1、S2、Sb．．．行程S, S1, S2, Sb. . . stroke
θ、θb．．．轉動角度範圍θ, θb. . . Angle of rotation
θ1、θ2、θ3．．．轉動角度範圍Θ1, θ2, θ3. . . Angle of rotation
Δθ．．．單位轉動角度Δθ. . . Unit rotation angle
ΔS．．．單位行程ΔS. . . Unit travel
圖1係顯示本發明的第1實施形態之光圈裝置的全體構成之立體分解圖。Fig. 1 is an exploded perspective view showing the entire configuration of an aperture device according to a first embodiment of the present invention.
圖2係顯示同一光圈裝置之主要零件即光圈基板的構成之立體圖。Fig. 2 is a perspective view showing the configuration of a diaphragm substrate which is a main component of the same diaphragm device.
圖3係顯示同樣零件即轉動桿之構成的立體圖。Fig. 3 is a perspective view showing the configuration of the same part, that is, the rotating lever.
圖4係顯示在光圈基板上的光圈葉片驅動機構安裝部安裝轉動桿之狀態的立體圖。4 is a perspective view showing a state in which a rotating lever is mounted on a diaphragm blade drive mechanism mounting portion on a diaphragm substrate.
圖5係顯示在圖4的轉動桿之上側安裝中間齒輪的狀態之立體圖。Fig. 5 is a perspective view showing a state in which the intermediate gear is mounted on the upper side of the rotating lever of Fig. 4.
圖6係顯示在圖5的光圈葉片驅動機構安裝部之上安裝馬達安裝罩蓋的狀態之立體圖。Fig. 6 is a perspective view showing a state in which a motor mounting cover is attached to the mounting portion of the diaphragm blade drive mechanism of Fig. 5.
圖7係顯示在圖6的馬達安裝罩蓋之上安裝步進馬達的狀態之立體圖。Fig. 7 is a perspective view showing a state in which a stepping motor is mounted on the motor mounting cover of Fig. 6.
圖8係僅取出光圈葉片的驅動系統之元件並顯示其構成之立體圖。Fig. 8 is a perspective view showing the components of the drive system in which only the diaphragm blades are taken out and showing the configuration thereof.
圖9係從光圈葉片之驅動系統的光圈葉片側所見之平面圖。Figure 9 is a plan view seen from the side of the aperture blade of the drive system of the aperture blade.
圖10係顯示光圈全開(最大光圈)時轉動桿之轉動位置與光圈葉片的關係之平面圖。Fig. 10 is a plan view showing the relationship between the rotational position of the rotating lever and the diaphragm blade when the aperture is fully opened (maximum aperture).
圖11係顯示光圈全閉(最小光圈)時轉動桿之轉動位置與光圈葉片的關係之平面圖。Figure 11 is a plan view showing the relationship between the rotational position of the rotating lever and the diaphragm blade when the aperture is fully closed (minimum aperture).
圖12係顯示轉動桿的驅動銷之位置與轉動桿之轉動角度範圍的關係。Figure 12 is a graph showing the relationship between the position of the drive pin of the rotary lever and the range of the rotational angle of the rotary lever.
圖13係顯示本實施形態中轉動桿的轉動範圍與比較例中轉動桿的轉動角度範圍之差異。Fig. 13 is a view showing the difference between the range of rotation of the rotating lever in the present embodiment and the range of the angle of rotation of the rotating lever in the comparative example.
圖14係說明轉動桿之轉動角度範圍相對於基準線在小光圈側與大光圈側的分配之差異所帶來的優點。Fig. 14 is an illustration showing the advantage of the difference in the range of the rotational angle of the rotating lever with respect to the distribution of the reference line on the small aperture side and the large aperture side.
圖15係顯示本發明的第2實施形態之光圈裝置的全體構成之立體分解圖。Fig. 15 is an exploded perspective view showing the entire configuration of an aperture device according to a second embodiment of the present invention.
圖16係顯示在光圈基板上的光圈葉片驅動機構安裝部安裝轉動桿之狀態的立體圖。Fig. 16 is a perspective view showing a state in which the rotating lever is mounted on the diaphragm blade drive mechanism mounting portion on the diaphragm substrate.
圖17係顯示在圖16的光圈葉片驅動機構安裝部之上安裝馬達安裝罩蓋的狀態之立體圖。Fig. 17 is a perspective view showing a state in which a motor mounting cover is attached to the diaphragm blade drive mechanism mounting portion of Fig. 16.
圖18係顯示在圖17的馬達安裝罩蓋之上安裝步進馬達的狀態之立體圖。Fig. 18 is a perspective view showing a state in which a stepping motor is mounted on the motor mounting cover of Fig. 17.
10．．．光圈基板10. . . Aperture substrate
10a．．．支軸10a. . . Support shaft
11、14a．．．開口部11, 14a. . . Opening
12、13．．．光圈葉片12, 13. . . Aperture blade
12a、12b、12c．．．縱溝12a, 12b, 12c. . . Longitudinal groove
13a、13b、13c．．．縱溝13a, 13b, 13c. . . Longitudinal groove
12d、13d．．．長孔(橫溝)12d, 13d. . . Long hole
12e、13e．．．通孔部12e, 13e. . . Through hole
14．．．葉片蓋14. . . Blade cover
15．．．濾光片15. . . Filter
15a．．．曲柄桿部15a. . . Crank section
15b．．．貫通孔15b. . . Through hole
15c．．．長孔15c. . . Long hole
20．．．光圈葉片驅動機構安裝部20. . . Aperture blade drive mechanism mounting section
23．．．定位銷twenty three. . . Locating pin
24．．．卡爪twenty four. . . Claw
25．．．轉動桿用支持軸(轉動桿支持軸)25. . . Support shaft for rotating rod (rotating rod support shaft)
26．．．中間齒輪用支持軸(中間齒輪支持軸)26. . . Support shaft for intermediate gear (intermediate gear support shaft)
30．．．濾光片驅動機構安裝部30. . . Filter drive mechanism mounting section
40．．．轉動桿40. . . Rotating lever
41．．．環41. . . ring
41a、41b．．．止動部壁41a, 41b. . . Stop wall
42．．．桿底板42. . . Rod bottom plate
43．．．內齒輪43. . . Internal gear
44a、44b．．．驅動銷44a, 44b. . . Drive pin
45．．．中心孔45. . . Center hole
47．．．缺口47. . . gap
50．．．磁石50. . . magnet
51．．．磁性銷(磁性構件)51. . . Magnetic pin (magnetic member)
60．．．中間齒輪60. . . Intermediate gear
61．．．大齒輪61. . . big gear
66．．．中心孔66. . . Center hole
70．．．齒輪減速機構70. . . Gear reduction mechanism
80．．．馬達安裝罩蓋80. . . Motor mounting cover
81．．．罩蓋主板81. . . Cover motherboard
82．．．馬達安裝壁82. . . Motor mounting wall
83．．．收線夾83. . . Clip
84．．．鎖定孔84. . . Locking hole
85．．．鎖定片85. . . Locking piece
110．．．步進馬達110. . . Stepper motor
112．．．馬達齒輪112. . . Motor gear
113．．．托架113. . . bracket
115、125．．．電路板115, 125. . . Circuit board
116、126．．．電線116, 126. . . wire
117、127．．．連接器117, 127. . . Connector
120．．．致動器120. . . Actuator
121．．．驅動桿121. . . Drive rod
122．．．驅動銷122. . . Drive pin
f1、f2．．．箭頭方向F1, f2. . . Arrow direction
HA．．．光圈葉片驅動機構HA. . . Aperture blade drive mechanism
HB．．．濾光片驅動機構HB. . . Filter drive mechanism
Claims (6)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008245314A JP4653206B2 (en) | 2008-09-25 | 2008-09-25 | Aperture device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201013302A TW201013302A (en) | 2010-04-01 |
| TWI417641B true TWI417641B (en) | 2013-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW098132290A TWI417641B (en) | 2008-09-25 | 2009-09-24 | Diaphragm device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4653206B2 (en) |
| KR (1) | KR101141213B1 (en) |
| CN (1) | CN101685237B (en) |
| TW (1) | TWI417641B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI770672B (en) * | 2020-11-12 | 2022-07-11 | 大陸商信泰光學（深圳）有限公司 | Aperture assembly |
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| JP5490735B2 (en) * | 2011-01-07 | 2014-05-14 | セイコープレシジョン株式会社 | Aperture device and optical apparatus |
| JP5933272B2 (en) * | 2012-01-17 | 2016-06-08 | 泓記精密股▲分▼有限公司 | Aperture device |
| JP6241778B2 (en) * | 2013-02-20 | 2017-12-06 | パナソニックＩｐマネジメント株式会社 | Lens device and camera device |
| TWI584053B (en) * | 2013-03-05 | 2017-05-21 | Japan Prec Instr Inc | Aperture devices and cameras |
| CN109143724B (en) * | 2018-11-08 | 2023-12-22 | 山东理工大学 | Adjustable light ring device |
| CN111246077B (en) * | 2018-11-29 | 2021-06-22 | 浙江宇视科技有限公司 | Identification method and device for control pin of stepping motor |
| JP6733107B2 (en) * | 2018-12-20 | 2020-07-29 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ | Lens device, imaging device, and moving body |
| CN111965925B (en) * | 2020-09-04 | 2022-04-19 | 福州威泰思光电科技有限公司 | Light filter auto-change over device convenient to installation |
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| JP2004109531A (en) * | 2002-09-18 | 2004-04-08 | Sony Corp | Light quantity adjusting device and image pickup device |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20100035127A (en) | 2010-04-02 |
| TW201013302A (en) | 2010-04-01 |
| JP2010078754A (en) | 2010-04-08 |
| JP4653206B2 (en) | 2011-03-16 |
| KR101141213B1 (en) | 2012-05-07 |
| CN101685237A (en) | 2010-03-31 |
| CN101685237B (en) | 2012-01-11 |
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