1330752 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種投影鏡頭，特別是指一種内含可 變光圈模組的投影鏡頭。 【先前技術】 在現今投影機的投影鏡頭中，正在逐漸開發並採用一 些可變光圈裝置，用以控制通過該投影鏡頭的光通量；如 此’可以使該投影鏡頭投影和顯示出的畫南，具有較高的 晝面對比度，讓我們的眼睛感受到更逼真的畫面質感。 參閱圖1，是中華民國發明專利第1251112號所揭示的 一立體剖視圖，該發明包含一投影鏡頭n、一連接於該投 影鏡頭的支架12,及一設置於該支架12的擺動裝置13; 其中，該擺動裝置13包含一伸入且樞接於該投影鏡頭u的 遮光件131、一設置於該支架12的彈簧132、一兩端分別 連接於該遮光件131與彈簧132的連接件133，及一圍繞該 彈簧132與連接件133的線圈134。該發明利用導通該線圈 134的電迴路所產生一磁埸，磁吸該連接件133使其移動靠 近’並間接使該遮光件131由一第一位置擺動至一第二位 置，達到控制通過該投影鏡頭Η光通量的目的；相反地， 如果將該線圈134的電迴路斷路，則會使該遮光件131擺 動回該第一位置》 在上述發明中，連接於該投影鏡頭U的支架12,及該 擺動裝置13中遮光件131的一部份、彈簧132、連接件 133與線圈134等各元件，均是外露於該投影鏡頭u，所以 5 1330752 當上述發明要設置在一投影系統的機殼内時，除了該投影 鏡頭11的設置空間之外，還需要額外的設置空間用以容納 上述外露於該投影鏡頭11的各元件，如此，造成了該投影 系統機殼需要預留較大的設置空間，才能裝設該投影鏡頭 11、支架12,及該擺動裝置13的問題。此外，分別位於該 遮光片131前後的一前群鏡片14與一後群鏡片15,都是採 用固定設計’無法實現光學變焦（Zooming)的功能。 【發明内容】 因此，本發明之一目的，即在提供一種將可變光圈模 組内藏以達到縮小所需設置空間之内含可變光圈模組的投 影鏡頭。 本發明之另一目的，即在提供一種可以變焦又不會干 涉可變光圈模組的驅動控制線組之内含可變光圈模組的投 影鏡頭。 於是，本發明内含可變光圈模組的投影鏡頭，包含一 第一鏡群、一可變光圈模組、一固定筒，及一迴轉筒；該 第一鏡群包括一光轴；該可變光圈模組是沿該光轴方向上 固設於該第一鏡群，並包括一具有一供光線通過之開放區 的基座、一設置於該基座並具有一移動件的驅動單元，及 一連接於該移動件的遮光件，其中，該驅動單元更具有一 會驅動該移動件之驅動件，及一連接於該驅動件的驅動控 制線組，而當該移動件被驅動時，該遮光件改變遮閉該開 放區的面積；該固定筒是供該第一鏡群與可變光圈模組穿 設，並包括多數沿該光軸方向延伸的軸向溝，及一供該驅 6 1330752 動控制線組穿出的出線孔；該迴轉筒是可轉動地套設於該 固定筒，並包括多數分別對應該等軸向溝的凸輪溝，及多 . 數分別穿過該凸輪溝與軸向溝並固設於該第一鏡群的凸輪 本發明之功效在於：該可變光圈模組是内藏於該迴轉 ‘ 筒與固定筒内’達到所需設置空間的縮小化；並且該可變 . 光圈模組的驅動控制線組可經由該固定筒的出線孔穿出， φ 使得進行變焦時不會干涉該驅動控制線組，確實能達到本 發明之目的。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之二個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中’類似的元件是以相同的編號來表示。 _ 參閱圖2，是一立體分解圖，說明本發明内含可變光圈 模組的投影鏡頭2的一第一較佳實施例.，既可以控制投射 光線通過時的光通量，又可以進行變焦；本發明投影鏡頭2 ' 包含一第一鏡群3、一可變光圈模組4、一第二鏡群5、一 固定筒6，及一迴轉筒7。 配合圖3,是一立體示意圖，該第一鏡群3包括一連接 座31、一由該連接座31延伸的鏡筒32、三形成於該連接 座31的鎖固孔33、多數設置於該鏡筒32内的透鏡34，及 一穿過該等透鏡34的光轴I;其中’該連接座31具有一概 7 1330752 呈扇形的缺口 311。 配合圖4、圖5，分別是該可變光圈模組4 一立體分解 ， 圖與一立體組合圖，該可變光圈模組4沿該光轴I方向上鎖 設於該第一鏡群3的連接座31，並包括一基座41、一驅動 單元42、一遮光件43,及一上蓋44。其中，該基座41具 • 有一供光線通過的開放區411、一容置該遮光件43的設置 槽412’及多數自該設置槽412 一底面凸出並供承載該遮光 0 件43的減阻滑軌413 ;在本實施例中，該開放區411是一 呈圓形的通孔。另外，該驅動單元42是設置於該基座41， 並包括一設置於該基座41的基礎塊421、一形成於該基礎 塊421上並沿一垂直於該光轴I方向的轴向η沿伸的滑槽 422、一移動件423、一設置於該移動件423並與該滑槽 422相互配合的滑塊424、一連接於該基礎塊421的驅動件 425 ' —連搂於該驅動件425的驅動控制線組426、一平行 該軸向II並被該驅動件425驅動的導螺桿427、一設置於該 # 基座41並遠離該驅動件425的感應器428，及一連接於該 感應器428的感應器線組429。其令，該移動件423具有一 與該導螺桿427相螺合並供該滑塊424設置的螺母塊451、 一將該螺母塊451與該遮光件43相連接的聯結塊452 ,及 一設置於該螺母塊451並可觸發該感應器428的觸發塊453 。在本實施例中，該驅動件425是一可控制轉動角度的步 進馬達（Step Motor);另外，該感應器428是一種利用光遮 斷觸發的感應器，也可以是一種利用觸碰觸發的感應器。 另外，該遮光件43是連接於該移動件423之聯結塊 8 1330752 452並設置於該設置槽412中，該遮光件43包括一呈圓弧 形的遮光緣431。而該上蓋44是一具有不遮閉該基座41開 . 放區411形狀的薄片，覆蓋該設置槽412並固定於該基座 41，使該遮光件43被限位於該設置槽412内》 該第二鏡群5與第一鏡群3沿該光軸I方向上分別位於 該可變光圈模組4的兩側’該第二鏡群5包括一鏡筒51、 多數設置於該鏡筒51内的透鏡52，及三形成於該鏡筒52 ^ 的鎖固孔53 ^ 參閱圖2、圖6，其中圖6是該固定筒6的一立體示意 圖，該固定筒6是供該第一、第二鏡群3、5與可變光圈模 組4穿設，並包括一供該迴轉筒7套設的周壁61、一由該1330752 IX. Description of the Invention: [Technical Field] The present invention relates to a projection lens, and more particularly to a projection lens including a variable aperture module. [Prior Art] In the projection lens of today's projectors, some variable aperture devices are being developed and used to control the luminous flux passing through the projection lens; thus, the projection lens that can be projected and displayed by the projection lens has The higher contrast of the face makes our eyes feel more realistic. 1 is a perspective cross-sectional view of the Republic of China Patent No. 1251112, which includes a projection lens n, a bracket 12 coupled to the projection lens, and a swinging device 13 disposed on the bracket 12; The oscillating device 13 includes a light blocking member 131 extending into the pivoting lens u, a spring 132 disposed on the bracket 12, and a connecting member 133 connected to the light blocking member 131 and the spring 132 respectively. And a coil 134 surrounding the spring 132 and the connector 133. The invention utilizes an electrical circuit that turns on the coil 134 to generate a magnetic yoke, magnetically attracts the connecting member 133 to move closer to 'and indirectly oscillates the light blocking member 131 from a first position to a second position, to achieve control through the The purpose of projecting the lens luminous flux; conversely, if the electrical circuit of the coil 134 is broken, the light blocking member 131 is swung back to the first position. In the above invention, the bracket 12 connected to the projection lens U, and A part of the light-shielding member 131 of the swinging device 13, the spring 132, the connecting member 133 and the coil 134 are exposed to the projection lens u, so 5 1330752 when the above invention is to be placed in the casing of a projection system In addition, in addition to the installation space of the projection lens 11, an additional installation space is needed to accommodate the components exposed above the projection lens 11, thus causing a large setting for the projection system casing to be reserved. The space can be equipped with the projection lens 11, the bracket 12, and the problem of the swinging device 13. Further, a front group lens 14 and a rear group lens 15 respectively located before and after the light shielding sheet 131 have a function of "fixing design" that cannot achieve optical zooming. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a projection lens including a variable aperture module that incorporates a variable aperture module to reduce the required installation space. Another object of the present invention is to provide a projection lens including a variable aperture module in a drive control line group that can zoom and does not interfere with the variable aperture module. Therefore, the projection lens including the variable aperture module of the present invention comprises a first mirror group, a variable aperture module, a fixed cylinder, and a rotary cylinder; the first mirror group includes an optical axis; The variable aperture module is fixed to the first mirror group along the optical axis direction, and includes a base having an open area through which light passes, and a driving unit disposed on the base and having a moving member. And a light blocking member connected to the moving member, wherein the driving unit further has a driving member for driving the moving member, and a driving control wire group connected to the driving member, and when the moving member is driven, The light blocking member changes an area that covers the open area; the fixed tube is for the first mirror group and the variable aperture module to be inserted, and includes a plurality of axial grooves extending along the optical axis direction, and one for the drive 6 1330752 The outlet hole through which the movable control wire group passes; the rotary cylinder is rotatably sleeved on the fixed cylinder, and includes a plurality of cam grooves respectively corresponding to the axial grooves, and the number passes through the cam respectively The groove and the axial groove are fixed to the cam of the first mirror group The effect of the invention is that the variable aperture module is built into the rotating 'cylinder and the fixed cylinder' to achieve the required installation space reduction; and the variable control coil assembly of the aperture module can pass through the fixed cylinder The outlet hole is pierced, and φ makes it possible to achieve the object of the present invention without interfering with the drive control line group when performing zooming. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention. Before the present invention is described in detail, it is to be noted that in the following description, similar elements are denoted by the same reference numerals. FIG. 2 is an exploded perspective view showing a first preferred embodiment of the projection lens 2 including the variable aperture module of the present invention, which can control the luminous flux when the projected light passes through, and can perform zooming; The projection lens 2' of the present invention comprises a first mirror group 3, a variable aperture module 4, a second mirror group 5, a fixed cylinder 6, and a rotary cylinder 7. FIG. 3 is a perspective view of the first lens group 3 including a connecting base 31, a lens barrel 32 extending from the connecting base 31, and three locking holes 33 formed in the connecting base 31. The lens 34 in the lens barrel 32, and an optical axis I passing through the lenses 34; wherein the connector 31 has a notch 311 having a sector shape of 7 1330752. FIG. 4 and FIG. 5 are respectively a perspective exploded view of the variable aperture module 4, and a perspective combination diagram. The variable aperture module 4 is locked to the first mirror group 3 along the optical axis I. The connecting base 31 includes a base 41, a driving unit 42, a light blocking member 43, and an upper cover 44. The pedestal 41 has an open area 411 for allowing light to pass through, a receiving groove 412' for accommodating the light blocking member 43, and a plurality of lowering from the bottom surface of the setting groove 412 for carrying the light blocking member 43. The sliding rail 413; in the embodiment, the open area 411 is a circular through hole. In addition, the driving unit 42 is disposed on the base 41 and includes a base block 421 disposed on the base 41, and an axial direction η formed on the base block 421 and perpendicular to the optical axis I. A sliding block 422 extending along the extension, a moving member 423, a slider 424 disposed on the moving member 423 and cooperating with the sliding slot 422, and a driving member 425' connected to the base block 421 are connected to the driving a driving control wire set 426 of the member 425, a lead screw 427 parallel to the axial direction II and driven by the driving member 425, a sensor 428 disposed at the # base 41 and away from the driving member 425, and a connection The sensor line set 429 of the sensor 428. The moving member 423 has a nut block 451 which is screwed with the lead screw 427 for the slider 424, a coupling block 452 for connecting the nut block 451 and the light blocking member 43, and a coupling block 452 The nut block 451 can trigger the trigger block 453 of the inductor 428. In this embodiment, the driving member 425 is a step motor that can control the rotation angle; in addition, the sensor 428 is a sensor that utilizes a light interruption trigger, or can be triggered by a touch. Sensor. In addition, the light blocking member 43 is coupled to the connecting block 8 1330752 452 of the moving member 423 and disposed in the setting groove 412. The light blocking member 43 includes a light shielding edge 431 having a circular arc shape. The upper cover 44 is a sheet having a shape that does not cover the opening and closing area 411 of the base 41, and covers the setting groove 412 and is fixed to the base 41 so that the light blocking member 43 is confined in the setting groove 412. The second mirror group 5 and the first mirror group 3 are respectively located on opposite sides of the variable aperture module 4 along the optical axis I. The second mirror group 5 includes a lens barrel 51, and a plurality of the lens barrels 51 are disposed on the lens barrel. a lens 52 in the 51, and a locking hole 53 formed in the lens barrel 52 ^. Referring to FIG. 2 and FIG. 6, FIG. 6 is a perspective view of the fixing cylinder 6, and the fixing cylinder 6 is for the first The second mirror group 3, 5 and the iris diaphragm module 4 are disposed, and include a peripheral wall 61 for the sleeve 7 to be sleeved.
周壁61的一周緣向該光轴I延伸的端壁62、三沿該光軸I 方向延伸的軸向溝63、三分別沿徑向凸出的限位件64，及 一對應該可變光圈模組4並供該驅動控制線組426、該感應 器線組429穿出的出線孔65 ;其中，每一限位件64是沿一 • 圓周方向上分別設置於相鄰二轴向溝63之間，另外，該出 線孔65疋沿該圓周方向上以一間距D位於其中一限位件64 一側0 配α圖7，是該迴轉筒7的一展開示意圖，該迴轉筒7 是可轉動地套設於該固定筒6外，並包括二分別對應該第 第一鏡群3、5的凸輪溝組71、72、多數分別穿過該凸 輪溝組71、72與軸向溝63並固設於該第一、第二鏡群3、 的凸輪銷73、74、一對應該出線孔65並位於該二凸輪溝 72之間的出線溝75，及一限位溝組％。其中，每 9 1330752 一凸輪溝組71、72具有三道分佈在該圓周方向上並螺旋延 伸的凸輪溝711、721，而較佳的設計是讓每一組輪溝組7 iAn end wall 62 extending from the peripheral edge of the peripheral wall 61 toward the optical axis I, three axial grooves 63 extending in the direction of the optical axis I, three limiting members 64 respectively protruding in the radial direction, and a pair of apertures to be iris The module 4 is provided with the driving control wire group 426 and the outlet hole 65 of the inductor wire group 429. Each of the limiting members 64 is disposed in the adjacent two axial grooves along a circumferential direction. Between the 63, in addition, the outlet hole 65 is located at a distance D along the circumferential direction of one of the limiting members 64. FIG. 7 is a schematic view of the rotating cylinder 7 and the rotating cylinder 7 is rotated. Is rotatably sleeved outside the fixed cylinder 6, and includes two cam groove groups 71, 72 respectively corresponding to the first mirror group 3, 5, and a plurality of cam grooves 71, 72 and axial grooves respectively passing through the cam groove groups 71, 72, respectively 63 is fixed to the first and second mirror groups 3, the cam pins 73, 74, a pair of outlet grooves 65 which are located between the two cam grooves 72, and a limit groove group %. Wherein, every 9 1330752 a cam groove group 71, 72 has three cam grooves 711, 721 which are distributed in the circumferential direction and spirally extended, and a preferred design is to allow each group of the groove group 7 i
、72的該等凸輪溝711、721在該圓周方向上呈平均地分佈 •，另外，該出線溝75是沿該圓周方向直線延伸並供該驅動 控制線組426、感應器線組429穿出；該限位溝組76具有 分別在該出線溝75的一長向兩側並沿該圓周方向直線延伸 的一第一限位溝761與一第二限位溝762 ;且該第_、第二 限位溝761、762各具有一遠離該出線溝75的止動端部763 、764。前述三個限位件64是分別穿設在該出線溝乃、第 一限位溝761 ’及第二限位溝762中，使該迴轉筒7獲得轴 向限位，僅能相對該固定筒6原地轉動。該迴轉筒7的一 轉動行程s是藉由該二止動端部763、764分別受該二限位 件64止動而獲得控制；而為了不干涉該驅動控制線組4% 、感應器線組429穿出，該出線溝75的長度至少需要大於 該轉動行程S加上該間距D的長度。但在另—種變化例中The cam grooves 711 and 721 of the 72 are evenly distributed in the circumferential direction. Further, the outlet groove 75 extends linearly along the circumferential direction and is provided for the driving control wire group 426 and the sensor wire group 429. The limiting groove group 76 has a first limiting groove 761 and a second limiting groove 762 extending linearly on a long side of the outlet groove 75 and extending along the circumferential direction; and the first limit groove 762; The second limiting grooves 761 and 762 each have a stopping end portion 763 and 764 away from the outlet groove 75. The three limiting members 64 are respectively disposed in the outlet groove, the first limiting groove 761 ' and the second limiting groove 762, so that the rotating cylinder 7 obtains an axial limit, and can only be fixed relative to the fixed The barrel 6 is rotated in place. A rotation stroke s of the revolving cylinder 7 is controlled by the two stopper ends 763, 764 being respectively stopped by the two limiting members 64; and in order not to interfere with the driving control line group 4%, the sensor line The group 429 is threaded out, and the length of the outlet groove 75 needs to be at least greater than the length of the rotation stroke S plus the spacing D. But in another variant
’若是取消該出線溝75中的限位件64，則該出線溝乃的 長度只要足以吸收該轉動行程s即可。 值得說明的是，該迴轉筒7的轉動行程s亦可不藉由 該限位溝組76來控制，例如精加卫控制該等凸輪溝η;、 川的長度’直接與該等凸輪銷73、74進行止動控制。另 外’在本發明中需要移動的鏡群數量如果減少或增加 則對應的凸輪溝組73、74蔣舍Λ担女从 〜 將會由現有的二組減少成一組， 或者增加成二組’或者更多組。 參閱圖 是本發明的一 立體組合圖；說明本發明内含 10 1330752 可變光圈模組的投影鏡頭2的該驅動控制線組426、感應器 線組429穿出並外露於該投影鏡頭2的狀態。 接著說明該可變光圈模組4的作動機制及達成功效： 參閱圖9,是一前視示意圖，當本發明投影鏡頭2被控 制讓最大光通量通過時’該驅動件425將驅動該導螺桿427 繞該軸向π朝一方向轉動，使得該移動件423沿該軸向π 逐漸遠離該驅動件425’而該遮光件43同時也會被帶動而 • 沿該軸向Π直線.移動，進而逐漸減少該開放區411被遮閉 的面積；如此，直到該移動件423靠近該感測器428並將 該觸發塊453伸入該感測器428中’讓該感測器428被觸 發並發出訊號’且使得該驅動件425停止驅動為止；此時 ，該遮光件43的圓弧形遮光緣431已離開該開放區411， 也就是該遮光件43完全無遮閉到該開放區411，如此本發 明投影鏡頭2達到一可供最大光通量通過的狀態。 參閱圖10，是一前視示意圖，如果本發明投影鏡頭2 φ 被控制讓最小光通量通過時，該驅動件425將驅動該導螺 桿427繞該轴向II朝另一方向轉動，整個移動件423將如 同上段所述，帶動該遮光件43沿該轴向Π直線移動用以逐 漸增加該開放區411被遮閉的面積；如此，直到該移動件 423趨近該驅動件425且不能再靠近為止。此時，該遮光件 43的圓弧形遮光緣431進入該開放區411，並且該遮光件 43已遮閉該開放區411的大部份面積，如此本發明投影鏡 頭2達到一可供最小光通量通過的狀態。值得說明的是， 當欲控制本發明投影鏡頭2成為介於最大、最小兩種光通 11 量之間的任何一種光通量時，可利用控制該驅動件425的 轉動角度，讓該移動件423與遮光件43停在所需要的位置 上，達成所需的光通量》 最後說明由該出線孔65與出線溝75 f出的該驅動控 制線組426、感應器線組429，如何能在該迴轉筒7旋轉以 造成該投影鏡頭2改變焦距時，不被該迴轉筒7干涉或甚 至切斷： 參閱圖2、圖8、圖1卜其中圖^是一剖面示意圖， 該驅動控制線組426、感應器線組429是依序由該固定筒6 的出線孔65、該迴轉筒7的出線溝75穿出，使得可由投影 鏡頭2外部透過該等線組426、429直接控制該可變光圈模 組4，達到變化通光量的目的。當該迴轉筒7繞該光軸1旋 轉時，使該第一、第二鏡群3、5會因該等凸輪溝組71、72 的推動而沿該光軸I方向移動，並達到使該投影鏡頭2改變 焦距的功效，而該可變光圈模組4會隨著該第一鏡群3 一 體連動》 參閱圖7之實線及圖12,其中圖12是一類似圖u的 剖面示意圖，說明當該迴轉筒7繞著該光軸Ϊ朝一逆時針方 向旋轉’以便造成該投影鏡頭2改變焦距時，該迴轉筒7 只能旋轉到當該第一限位溝761的止動端部763頂住配合 的限位件64為止，同時，該等鏡群3、5也會因配合的凸 輪溝組71、72而沿該光轴〗朝前移動；最後，在該第一限 位溝761的止動端部763的限位下，該迴轉筒7的出線溝 75旋轉後仍不會遮蓋該固定筒6的出線孔65，使得該驅動 1330752 控制線組426、感應器線組429的穿出不會產生干涉或被切 斷的問題。 參閱圖7之虛線及圖13,其中圓13是一類似圖_ 剖面示意圖’說明當該迴轉筒7繞著該光轴ς朝—順時針方 向旋轉，以便造成該投影鏡頭2改變焦距時，該迴轉筒7 只能旋轉到當該第二限位溝762的止動端冑⑽頂住配合 的限位件64為止，同時，該等鏡群3、5也會因配合的凸If the stopper 64 in the outlet groove 75 is canceled, the length of the outlet groove is sufficient to absorb the rotation stroke s. It should be noted that the rotation stroke s of the rotary cylinder 7 may not be controlled by the limit groove group 76, for example, the control cam grooves η; the length of the river 'directly with the cam pins 73, 74 performs stop control. In addition, if the number of mirror groups that need to be moved in the present invention is reduced or increased, the corresponding cam groove groups 73, 74 will be reduced from the existing two groups into one group, or added to two groups' or More groups. The present invention is a perspective view of the present invention. The drive control set 426 and the sensor set 429 of the projection lens 2 including the 10 1330752 variable aperture module of the present invention are exposed and exposed to the projection lens 2. status. Next, the operation mechanism and the effect of the variable aperture module 4 will be described. Referring to FIG. 9, a front view is taken. When the projection lens 2 of the present invention is controlled to pass the maximum luminous flux, the driving member 425 will drive the lead screw 427. Rotating around the axial direction π in a direction, the moving member 423 is gradually moved away from the driving member 425' along the axial direction π, and the blocking member 43 is also driven at the same time. The area of the open area 411 is blocked; thus, until the moving member 423 is close to the sensor 428 and the trigger block 453 is inserted into the sensor 428 'let the sensor 428 be triggered and emit a signal' And the driving member 425 stops driving; at this time, the circular arc-shaped shielding edge 431 of the light blocking member 43 has left the open area 411, that is, the light blocking member 43 is completely unobstructed to the open area 411, so the present invention The projection lens 2 reaches a state in which the maximum luminous flux can pass. Referring to Figure 10, there is shown a front view. If the projection lens 2 φ of the present invention is controlled to pass the minimum luminous flux, the driving member 425 will drive the lead screw 427 to rotate about the axial direction II in the other direction. The entire moving member 423 As will be described in the previous paragraph, the light blocking member 43 is linearly moved along the axial direction to gradually increase the area in which the open area 411 is blocked; thus, until the moving member 423 approaches the driving member 425 and cannot be approached again. . At this time, the arc-shaped light-shielding edge 431 of the light-shielding member 43 enters the open area 411, and the light-shielding member 43 has blocked most of the area of the open area 411, so that the projection lens 2 of the present invention reaches a minimum luminous flux. Passed state. It should be noted that when the projection lens 2 of the present invention is to be controlled to be any kind of luminous flux between the maximum and minimum optical fluxes 11, the rotation angle of the driving member 425 can be controlled to allow the moving member 423 to The light blocking member 43 is stopped at a desired position to achieve a desired luminous flux. Finally, how can the driving control line group 426 and the sensor wire group 429 exiting the outlet hole 65 and the outlet groove 75 f be When the rotary cylinder 7 rotates to cause the projection lens 2 to change the focal length, it is not interfered or even cut by the rotary cylinder 7: Referring to FIG. 2, FIG. 8, FIG. 1 , which is a schematic cross-sectional view, the drive control line group 426 The sensor wire set 429 is sequentially passed out through the outlet hole 65 of the fixed cylinder 6 and the outlet groove 75 of the rotary cylinder 7, so that the outer portion of the projection lens 2 can directly control the through-hole group 426, 429. The variable aperture module 4 achieves the purpose of varying the amount of light passing through. When the rotary cylinder 7 rotates around the optical axis 1, the first and second mirror groups 3, 5 are moved in the direction of the optical axis I by the pushing of the cam groove groups 71, 72, and the The projection lens 2 changes the function of the focal length, and the variable aperture module 4 is integrally linked with the first mirror group 3, see the solid line of FIG. 7 and FIG. 12, wherein FIG. 12 is a cross-sectional view similar to FIG. It is explained that when the rotary cylinder 7 rotates in a counterclockwise direction about the optical axis 以便 to cause the projection lens 2 to change the focal length, the rotary cylinder 7 can only be rotated to the stop end 763 of the first limiting groove 761. The frame members 3, 5 are also moved forward along the optical axis by the mating cam groove groups 71, 72; and finally, the first limit groove 761 Under the limit of the stop end 763, the outlet groove 75 of the rotary cylinder 7 still does not cover the outlet hole 65 of the fixed cylinder 6, so that the drive 1330752 controls the wire group 426 and the sensor wire group 429. The problem of wearing out does not interfere or be cut off. Referring to the dashed line of FIG. 7 and FIG. 13, wherein the circle 13 is a similar view _ cross-sectional view 'illustrated when the revolving cylinder 7 is rotated about the optical axis toward the clockwise direction to cause the projection lens 2 to change the focal length, The rotating cylinder 7 can only be rotated until the stopping end 胄 (10) of the second limiting groove 762 bears against the engaging limiting member 64, and at the same time, the mirror groups 3 and 5 are also matched by the convexity.
輪溝組71、72而沿該光軸1朝後移動；最後，在該第二限 位溝762的止動料764的限位下，該迴轉筒7的出線溝 75因為有足夠的長度(至少大於該轉動行程〜上間距d的 長度）’旋轉後仍不會遮蓋該固定筒6的出線孔65，使得該 驅動控制線組426、感應器線組429的穿出不會產生干涉或 被切斷的問題。 綜合上述各段’本發明内含可變光圈模組的投影鏡頭2 具有下列的優點：The groove group 71, 72 moves backward along the optical axis 1; finally, under the limit of the stopper 764 of the second limiting groove 762, the outlet groove 75 of the rotary cylinder 7 has sufficient length (At least longer than the length of the rotation stroke to the upper distance d) 'The outlet hole 65 of the fixed cylinder 6 is not covered after the rotation, so that the drive control wire group 426 and the sensor wire group 429 do not interfere with the penetration of the sensor wire group 429. Or the problem of being cut off. Combining the above paragraphs' projection lens 2 incorporating the variable aperture module of the present invention has the following advantages:
一、可將可變光圈模組4内藏以達到縮小所需設置空 間：本發明投影鏡頭2將該可變光圈模組4設置於該迴轉 筒7與固定筒6内，並利用該第—鏡群3的缺口 3ιι、該出 線孔65、及出線溝75,將該可變光圈模組4的該等線組 426、429依序穿出，達成將可變光圈模組4内藏及縮小 本發明投影鏡頭2所需設置空間的目的。 二、可進行變焦又不會干涉可變光圈模組4的該等線 組426、429 ··當該迴轉筒7繞該光軸工旋轉時使該第一 、第二鏡群3、5會因該等凸輪溝組71、72的推動而沿該 13 1330752 光軸I方向移動’並達到使該投影鏡頭2改變焦距的功效； 而且利用第一、第二限位溝761、762具有的止動端部763 、764,使該迴轉筒7的出線溝75在經過該迴轉筒7旋轉 之後，仍不會遮蓋該固定筒6的出線孔65，使該驅動控制 線組426、感應器線組429穿出不會產生干涉或被切斷的問 題。 二、可以控制多段的光通量：本發明投影鏡頭2的可 變光圈模組4利用該驅動件425驅動該移動件423，並同時 帶動該遮光件43沿該軸向Π直線移動，可使得該遮光件43 的遮光緣431逐漸進入或離開該開放區411，用以改變該開 放區411被該遮光件43遮閉面積的大小，使剩餘未被遮閉 的區域通過不同的光通量；換句話說，可以利用控制該驅 動件425的轉動角度，讓該移動件423與遮光件43停在所 需要的位置上’形成該開放區411有不同的面積未被遮閉， 通過所需的光通量’達成多段光通量的控制。 參閱圖14、圖15’分別是一立體示意圖及一立體組合 圖’說明本發明内含可變光圈模組的投影鏡頭2的一第二 較佳實施例’其中與該第一較佳實施例不同之處在於：該 固定筒6的出線孔65是被設計位於該端壁62上，如此， 該驅動控制線組426、感應器線組429可以直接由位於該端 壁62上的出線孔65穿出；另外’該迴轉筒7則不必具有 一供該等控制線組426、429穿出的出線溝75，而可以設計 改變成一輔助限位溝765用以協助該迴轉筒7獲得轴向限 位。如此’確實可以讓本發明内含可變光圈模組的投影鏡 14 1330752 頭2達到可變焦又不會干涉該等控制線組426、429的目的 〇 . 惟以上所述者’僅為本發明之較佳實施例而已，當不 . 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 • 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 φ 圖1是中華民國發明專利第I251U2號所揭示的一立 體剖視圖； 圖2是一立體分解圖’說明本發明内含可變光圈模組 的投影鏡頭之一第一較佳實施例； 圖3是一立體示意圖，說明該第一較佳實施例中一第 一鏡群與一可變光圈模組； 圖4是該第一較佳實施例中的可變光圈模組之—立體 分解圖； • 圖5是該第一較佳實施例中的可變光圈模組之一立體 組合圖； 圖6是該第一較佳實施例中一固定筒的一立體示意圖 9 圖7是該第一較佳實施例中一迴轉筒的一展開示意圖 9 圖8是該第一較佳實施例的一立體組合圖； 圖9是一前視示意圖，說明該第一較佳實施例中一移 動件與一遮光件被控制在一最大光通量通過的狀態； 15 1330752 ® 10 m示意圖’說明該第—較佳實施例中 動件與遮光件被控制在—最小光通量通過的狀態； .圖11是一沿圖8中之割面線u-n所取的剖面示意圖 t 施例中類似圖U的剖面示意圖，說明該第-較佳實 施例中的迴轉筒朝— ^ 逆時針方向旋轉至一止動狀態； 圓13是一類也 施例中的迴轉筒朝 圖Μ是一⑼=針方向旋轉至一止動狀態； 的投影鏡Z意圖’說明本發明内含可變光圈模組 第二較佳實施例；及 圖15是該第二# 較佳實施例的一立體組合圖。1. The variable aperture module 4 can be built in to reduce the required installation space: the projection lens 2 of the present invention is disposed in the rotary cylinder 7 and the fixed cylinder 6 and utilizes the first The notch 3 ιι of the mirror group 3, the outlet hole 65, and the outlet groove 75, the line groups 426 and 429 of the variable aperture module 4 are sequentially passed out, and the variable aperture module 4 is built in. And the purpose of reducing the required installation space of the projection lens 2 of the present invention. 2. The wire sets 426, 429 which can be zoomed without interfering with the variable aperture module 4. · When the rotary cylinder 7 rotates around the optical axis, the first and second mirror groups 3, 5 will be Because of the pushing of the cam groove groups 71, 72, it moves along the direction of the optical axis I of 13 1330752 and achieves the effect of changing the focal length of the projection lens 2; and the first and second limiting grooves 761, 762 are used. The moving end portions 763 and 764 prevent the outlet groove 75 of the rotating cylinder 7 from covering the outlet hole 65 of the fixed cylinder 6 after being rotated by the rotating cylinder 7, so that the driving control line group 426 and the inductor The wire set 429 is pierced without problems of interference or being cut. Second, the multi-segment luminous flux can be controlled: the variable aperture module 4 of the projection lens 2 of the present invention drives the moving member 423 by the driving member 425, and simultaneously drives the shading member 43 to move linearly along the axial direction, so that the shading can be made. The light shielding edge 431 of the member 43 gradually enters or leaves the open area 411 for changing the size of the area of the open area 411 blocked by the light blocking member 43 so that the remaining uncovered area passes through different luminous fluxes; in other words, The rotation angle of the driving member 425 can be controlled to stop the moving member 423 and the light shielding member 43 at a desired position. The opening area 411 is formed to have a different area without being blocked, and the required luminous flux is used to reach a plurality of segments. Control of luminous flux. 14 and FIG. 15 ′ are respectively a perspective view and a perspective view of a second preferred embodiment of the projection lens 2 including the variable aperture module of the present invention, wherein the first preferred embodiment The difference is that the outlet hole 65 of the fixing cylinder 6 is designed on the end wall 62. Thus, the driving control wire group 426 and the sensor wire group 429 can be directly taken out by the outlet wall 62. The hole 65 is pierced; in addition, the revolving cylinder 7 does not have to have an outlet groove 75 for the control line sets 426, 429 to pass through, and can be designed to be changed into an auxiliary limiting groove 765 for assisting the revolving cylinder 7 to be obtained. Axial limit. Thus, the head 2 of the projection mirror 14 1330752 incorporating the variable aperture module of the present invention can be zoomed without interfering with the control line groups 426, 429. However, the above is only the present invention. The preferred embodiment of the present invention is not limited thereto, and the scope of the present invention is limited to the simple equivalent changes and modifications made by the scope of the invention and the description of the invention. Within the scope. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective cross-sectional view of the Republic of China invention patent No. I251U2; FIG. 2 is an exploded perspective view showing one of the first projection lenses of the present invention including an iris diaphragm module. FIG. 3 is a perspective view showing a first mirror group and a variable aperture module in the first preferred embodiment; FIG. 4 is a variable aperture module in the first preferred embodiment. Figure 3 is a perspective view of one of the variable aperture modules of the first preferred embodiment; Figure 6 is a perspective view of a fixed cylinder of the first preferred embodiment. 7 is an exploded perspective view of a revolving cylinder in the first preferred embodiment. FIG. 8 is a perspective assembled view of the first preferred embodiment. FIG. 9 is a front elevational view showing the first preferred embodiment. The first moving part and the one light blocking member are controlled in a state in which the maximum luminous flux passes; 15 1330752 ® 10 m schematic 'illustrating that the moving part and the light blocking member are controlled in the state of the minimum luminous flux passing through the first preferred embodiment; Figure 11 is a cross-sectional line un taken in Figure 8 A schematic cross-sectional view similar to Figure U in the embodiment, illustrating that the revolving cylinder of the first preferred embodiment is rotated counterclockwise to a stop state; the circle 13 is a type of revolving cylinder in the embodiment Figure Μ is a (9) = needle rotation to a stop state; the projection mirror Z is intended to illustrate the second preferred embodiment of the variable aperture module of the present invention; and Figure 15 is the second embodiment. A three-dimensional combination of the map.
16 1330752 【主要元件符號說明】 2 ..........投影鏡頭 3 ..........第一鏡群 31 .........連接座 311 .......缺口 32 .........鏡筒 33 .........鎖固孔 34 .........透鏡 4 ..........可變光圈模組 41 .........基座 411 .......開放區 412 .......設置槽 413 .......減阻滑軌 42 .........驅動單元 421 .......基礎塊 422 .......滑槽 423 .......移動件 424 .......滑塊 425 .......驅動件 426 .......驅動控制線組 427 .......導螺桿 428 .......感應器 429 .......感應器線組 43 ..............遮光件 431..........遮光緣 44.........上蓋 451 .......螺母塊 452 .......聯結塊 453 .......觸發塊 5 ..........第二鏡群 51 .........鏡筒 52 .........透鏡 53 .........鎖固孔 6 ..........固定筒 61 .........周壁 62 .........端壁 63 .........軸向溝 64 .........限位件 65 .........出線孔 7 ..........迴轉筒 71、72··凸輪溝組 711、721·凸輪溝 73、74 ··凸輪銷 75 .........出線溝 76 .........限位溝組 761 .......第一限位溝 762 .......第二限位溝 17 1330752 763、764止動端部 II .....轴向 765 .......輔助限位溝 S "... ••…轉動行程 I...........光轴 D"… ••…間距16 1330752 [Description of main component symbols] 2 .......... Projection lens 3 .......... First mirror group 31 ......... Connector 311 . ...notch 32 .........the lens barrel 33 .........the locking hole 34 .........the lens 4 ... .... iris diaphragm module 41 ......... base 411 .... open area 412 .... set slot 413 .... Blocking rail 42 .... drive unit 421 .... base block 422 .... chute 423 .... moving member 424 .... ...slider 425 .... drive member 426 .... drive control line set 427 . . . lead screw 428 .... sensor 429 .. ..... sensor wire set 43 ..............shading member 431..........shading edge 44......top cover 451 ....... nut block 452 ....... coupling block 453 ....... trigger block 5 .......... second mirror group 51 .... ..... lens barrel 52 ......... lens 53 ... ... locking hole 6 .......... fixed cylinder 61 ..... ....perimeter wall 62 .........end wall 63 ......... axial groove 64 ... ... limit member 65 ... ...outlet hole 7 ..........revolving cylinder 71,72··cam groove group 711,721·cam groove 73,74 ··cam pin 75 ......... Outlet groove 76 ... ... limit Ditch group 761 .......first limit groove 762 .... second limit groove 17 1330752 763, 764 stop end II ..... axial 765 .... ...Auxiliary Limit Groove S "... ••...Rotary Travel I........... Optical Axis D"... ••... Spacing
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