201013247 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種鏡頭，特別是指一種可防止洩光 的伸縮鏡頭。 【先前技術】 參閱圖卜2,為現有-種可沿__ l伸縮對焦的伸 縮鏡頭1，該伸縮鏡頭1包含一基座u、一固設於該基座 11之第一凸輪筒12、一可轉動地套設於該第一凸輪筒12之 迴轉筒13、一直進筒14、一可轉動地套設於該直進筒μ 之第二凸輪筒15、一第一鏡群單元16、—第二鏡群單元π "X置於該基座11之感光元件18，及一固設於該第—鏡 群單元16之防塵蓋裝置19。 該直進筒14是可沿該軸線L方向往復移動地與該第一 凸輪筒12連結’並包括一具有一内周面142之筒壁Ml， 及一由該内周面142彎折延伸之驅動爪143，該驅動爪143 是用以連動該防塵蓋裝置19之啟閉。 该第一鏡群單元16是穿設於該直進筒14内，並包括 —第一群框161、一固設於該第一群框161且與該感光元件 18對應之第一鏡片162，及複數連接於該第一群框161之 第一連動銷163,每一連動銷163是穿設於該直進筒14而 滑接於該第二凸輪筒15。 該第二鏡群單元17穿設於該直進筒14内，並包括— 具有一外周面Π2之第二群框171，及一固設於該第二群框 171且與該第一鏡片162對應之第二鏡片173,及複數連接 201013247 於該第二群框171之第二連動銷 設於該直進筒Η而滑接於該第二凸輪^連動銷…穿 轉動藉示)帶動該迴轉筒13繞該軸、“ ..,,17 一凸輪筒15、該直進筒14與該等鏡群單 屮…-沿該轴線[方向往遠離該感光元件18之方向伸 出以進行對焦工作。 雖然該伸縮鏡頭1可以伸縮以進行對焦工作，但具有 下列缺點： ^ ❹201013247 IX. Description of the Invention: [Technical Field] The present invention relates to a lens, and more particularly to a telescopic lens that can prevent light leakage. [Prior Art] Referring to Figure 2, there is a telescopic lens 1 that can be telescoped along the __1, the telescopic lens 1 includes a base u, a first cam barrel 12 fixed to the base 11, a rotating sleeve 13 rotatably sleeved in the first cam barrel 12, a continuous feeding tube 14, a second cam barrel 15 rotatably sleeved in the straight feeding tube μ, a first mirror group unit 16, The second mirror group unit π "X is placed on the photosensitive element 18 of the base 11 and a dust cover device 19 fixed to the first mirror group unit 16. The straight-moving cylinder 14 is coupled to the first cam barrel 12 so as to be reciprocally movable in the direction of the axis L, and includes a cylinder wall M1 having an inner peripheral surface 142, and a drive extending from the inner peripheral surface 142. The claw 143 is configured to interlock the opening and closing of the dust cover device 19. The first mirror group unit 16 is disposed in the straight-moving cylinder 14 and includes a first group frame 161, a first lens 162 fixed to the first group frame 161 and corresponding to the photosensitive element 18, and The first interlocking pins 163 are connected to the first group frame 161, and each of the linking pins 163 is disposed on the straight-moving cylinder 14 and is slidably coupled to the second cam barrel 15. The second mirror group unit 17 is disposed in the straight-moving cylinder 14 and includes a second group frame 171 having an outer peripheral surface Π 2, and a second frame 171 fixed to the second group frame 171 and corresponding to the first lens 162 The second lens 173, and the plurality of connection 201013247, the second interlocking pin of the second group frame 171 is disposed on the straight-moving cylinder and is slidably coupled to the second cam-linking pin to drive the rotating cylinder 13 Around the axis, "..," 17 a cam barrel 15, the straight-in barrel 14 and the mirror group unit ... - extend along the axis [direction away from the photosensitive element 18 for focusing operation. The telescopic lens 1 can be telescopic to perform focusing work, but has the following disadvantages: ^ ❹
，、4二鏡群單元17位於-遠離該第-鏡群單元16 之近拍位置時，該第二群框m之外周面Μ與該直進筒 Η之内周面142間存有一鲦睹，Λ ,, _ 啕縫隙10，如此，將使得該伸縮鏡 頭1外部之光線（如箭頭所示）通過該第一鏡片162後， 通過該缝隙Π)經由該内、外周面142、172反射而投射至 該感光^件丨8,造成㈣光元件18非感光•线光 之情形。 二、由於該驅動爪143是由該直進筒14之内周面142 彎折延伸，因此，除了使得該直進筒14之射出模具製作難 度提高外，還會增加該直進筒14射出成型後進行拔模之時 間，致使製造成本增加。 【發明内容】 因此，本發明之一目的即在提供一種可避免非預期感 光的可防止洩光的伸縮鏡頭。 本發明之另一目的即在提供一種可降低製造成本的可 防止洩光的伸縮鏡頭。 201013247 於是’本發明可防止洩光的伸縮鏡頭包含一基座、一 基筒、一直進筒、一第一鏡群單元、一第二鏡群單元，及 一遮光單元。該基筒是固設於該基座並圍繞一光軸。該直 進筒是可沿該光軸方向往復移動地安裝於該基筒。該第一 鏡群單元是可沿該光軸方向移動地設置於該直進筒内，並 包括一具有一圍繞該光轴之内周面的第一群框，及至少一 沿S亥光轴方向固設於該第一群框之第一鏡片。該第二鏡群 單元是可沿該光轴方向移動地設置於該直進筒内，並包括 一具有一沿該光軸方向面對該第一群框之承靠面的第二群 框’及至少一固設於該第二群框且對應該第一鏡片之第二 鏡片，當該第二群框位於一遠離該第一鏡片之近拍位置時 ，該第二群框與該第一群框之内周面間具有一縫隙。該遮 光單元包括一可沿該光軸方向移動地設置於該第二群框之 遮光座，及一夹設於該遮光座與該承靠面間且可推送該遮 光座往該第一鏡片移動而遮蔽該縫隙之彈性件。 藉由該彈性件推送該遮光座往該第一鏡片之方向移動 而遮蔽該縫隙，可避免該伸縮鏡頭外部之光線經由反射通 過該缝隙而造成非預期感光。 【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一個較佳實施例的詳細說 清楚的呈現。 參閲圖3、4,本發明可防止洩光的伸縮鏡頭包含一基 座2、一基筒3、一直進筒4、一凸輪筒5、—第一鏡群單 201013247 元6、一第二鏡群單元7、一遮光單元8、一防塵蓋裝置9 、一驅動件30，及一感光元件2〇。 該基座2包括複數圍繞一光軸γ之擋塊21。 該基筒3是固設於該基座2且圍繞該光軸γ，並包括複 數沿該光軸Υ方向延伸之導槽31、複數沿一圓周方向延伸 之凸輪溝32及一穿孔33。 配合參閱圖5 ’該直進筒4是可沿該光轴Υ方向往復移 動地安裝於該基筒3，並包括複數圍繞該光軸γ之擋止面 41、複數分別與該等播止面41連通之直溝42、複數分別滑 接於該基筒3之該等導槽31的導引部43、複數凸設於一外 周面44之凸出部45、複數第一直進溝46及複數第二直進 溝47 〇 該凸輪筒5是可轉動地套設於該直進筒4且與該基筒3 連接，並包括一凹設於一内周面51且與該直進筒4之該等 凸出部45滑接之迴轉槽52、複數凸設於—外周面53且分 別與該基筒3之該等凸輪溝32滑接之導引部54、複數沿圓 周方向設置於該外周面53之齒部55、複數沿圓周方向延伸 之第一凸輪溝56,及複數沿該圓周方向延伸之第二凸輪溝 57 ° =該第一鏡群單元6是可沿該光軸Υ方向移動地設置於 该直進筒4内’並包括一具有—圍繞該光抽Υ之内周面611 的第一群框61、一沿該光軸γ方向固設於該第一群框6ι之 第一鏡片62,及複數與該第一群框61連接之第—連動銷 63，該等第一連動銷63是分別穿設於該直進筒4之該等第 201013247 5之該等第一凸輪溝56 一直進溝46而分別滑接於該凸輪筒 參閱圖3〜6,該第二鏡群單元7是可沿該光轴γ方向移 動地設置於該直進筒…並包括一呈階級狀之第二群框 71、-固設於該第二群框71且對應該第—鏡群單元6之第 一鏡片62的第二鏡片72,及複數與該第二群框71連接之When the 4th mirror group unit 17 is located at a close-up position away from the first mirror group unit 16, a gap between the outer peripheral surface of the second group frame m and the inner peripheral surface 142 of the straight-moving cylinder is stored. Λ , , _ 啕 slit 10, such that the light outside the telescopic lens 1 (shown by the arrow) passes through the first lens 162, and is projected through the slit Π, 172 through the inner and outer peripheral surfaces 142, 172 Up to the photosensitive member 8 causes the (four) optical element 18 to be non-photosensitive and line light. 2. Since the driving claw 143 is bent and extended by the inner circumferential surface 142 of the straight feeding cylinder 14, in addition to making the injection mold of the straight feeding cylinder 14 more difficult to manufacture, the straight feeding cylinder 14 is increased after injection molding. The time of the mold leads to an increase in manufacturing costs. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a telescopic lens that can prevent leakage of light that can prevent unintended sensation. Another object of the present invention is to provide a telescopic lens which can prevent light leakage which can reduce the manufacturing cost. 201013247 Thus, the telescopic lens capable of preventing light leakage of the present invention comprises a base, a base cylinder, a continuous advance cylinder, a first mirror group unit, a second mirror group unit, and a light shielding unit. The base cylinder is fixed to the base and surrounds an optical axis. The straight cylinder is attached to the base cylinder so as to be reciprocally movable in the optical axis direction. The first mirror group unit is disposed in the straight-moving cylinder so as to be movable along the optical axis direction, and includes a first group frame having an inner circumferential surface surrounding the optical axis, and at least one along the optical axis of the S-axis The first lens is fixed to the first group frame. The second mirror group unit is movably disposed in the straight-moving cylinder along the optical axis direction, and includes a second group frame having a bearing surface facing the first group frame along the optical axis direction and At least one second lens fixed to the second group frame and corresponding to the first lens, and the second group frame and the first group when the second group frame is located at a close-up position away from the first lens There is a gap between the inner faces of the frame. The light shielding unit includes a light shielding seat disposed in the second group frame and movable along the optical axis, and is disposed between the light shielding seat and the bearing surface and can push the light shielding seat to move to the first lens And the elastic member that shields the slit. The elastic member pushes the light-shielding seat to move in the direction of the first lens to shield the slit, so that the light outside the telescopic lens can be prevented from being undesirably sensitive through reflection through the slit. 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. Referring to Figures 3 and 4, the telescopic lens for preventing leakage of light of the present invention comprises a base 2, a base cylinder 3, a continuous feed cylinder 4, a cam cylinder 5, a first mirror group 201013247 yuan 6, a second The mirror group unit 7, a light shielding unit 8, a dust cover device 9, a driving member 30, and a photosensitive member 2''. The susceptor 2 includes a plurality of stops 21 that surround an optical axis γ. The base cylinder 3 is fixed to the base 2 and surrounds the optical axis γ, and includes a plurality of guide grooves 31 extending in the direction of the optical axis, a plurality of cam grooves 32 extending in a circumferential direction, and a through hole 33. Referring to FIG. 5, the straight-moving cylinder 4 is mounted to the base cylinder 3 so as to be reciprocally movable in the optical axis , direction, and includes a plurality of blocking surfaces 41 surrounding the optical axis γ, and a plurality of the respective stopping surfaces 41. a straight groove 42 connected, a plurality of guiding portions 43 respectively sliding to the guiding grooves 31 of the base cylinder 3, a plurality of protruding portions 45 protruding from an outer peripheral surface 44, a plurality of first straight grooves 46 and a plurality of a straight groove 47. The cam barrel 5 is rotatably sleeved on the straight barrel 4 and connected to the base tube 3, and includes a concave recessed on an inner circumferential surface 51 and protruding from the straight cylinder 4 a sliding groove 52 that is slidably connected to the portion 45, a plurality of guiding portions 54 that are protruded from the outer peripheral surface 53 and are respectively slidably coupled to the cam grooves 32 of the base cylinder 3, and a plurality of teeth that are circumferentially disposed on the outer peripheral surface 53 a portion 55, a plurality of first cam grooves 56 extending in the circumferential direction, and a plurality of second cam grooves extending in the circumferential direction 57° = the first mirror group unit 6 is movably disposed along the optical axis Straight into the cylinder 4' and including a first group frame 61 having an inner circumferential surface 611 surrounding the light twitch, and being fixed in the optical axis γ direction a plurality of first lenses 62 of the frame 6i, and a plurality of first interlocking pins 63 connected to the first group frame 61, wherein the first linking pins 63 are respectively disposed on the first feeding frame 4 of the 201013247 5 The first cam groove 56 is inserted into the groove 46 and is respectively slidably coupled to the cam barrel. Referring to FIGS. 3 to 6, the second mirror group unit 7 is movably disposed along the optical axis γ direction in the straight-moving cylinder and includes a a second group frame 71 in the form of a class, a second lens 72 fixed to the second group frame 71 and corresponding to the first lens 62 of the first mirror group unit 6, and a plurality of frames connected to the second group frame 71 It
第二連動鎖73。該第二群框71具有一大徑段7ιι、一由該 大徑段711延伸且可穿設於該第一群框61的小徑段712、 複數設置於該小徑段712之限位槽713，及一位於該大、小 徑段 711、712 方向 群框61之 承靠面714。該等第二連動銷73是分別穿設於該基筒3之 該等第二直進溝47而分別滑接於該凸輪筒5之該等第二凸 輪溝57。值得說明的是，該等鏡群單元6、7之鏡片數目可 依該伸縮鏡頭的使用目的（例如望遠鏡頭或廣角鏡頭）而有所 調整，可將該第一鏡片62與該第二鏡片72的數目更改為 二片或三片。 該遮光單元8包括一可沿該光軸γ方向移動地設置於 〇 該第二鏡群單元7之第二群框71的遮光座81，及一央設於 . 該遮光座81與該第二群框71之承靠面714間之彈性件82 。該遮光座81具有一套設於該小徑段712之環狀本體811 、複數形成於該本體811之一内環面816且分別喪入該等限 位槽713之限位塊812、一固定爪813、複數由該本體811 往該基座2延伸之限位腳814，及一與該第二群框71之承 靠面714對應且供該彈性件82嵌入之定位槽815，其中， 10 201013247 每一限位腳814具有一由該本體811往該基座2延伸之連接 段817,及一由該連接段817延伸而滑接於該直進筒4之其 中一直溝42且具有一頂抵面819之限位段818。該彈性件 82可推送该遮光座8丨沿該光轴γ方向往該第一鏡群單元6 之第一鏡片62移動，值得說明的是，該彈性件82可以是 一盤形彈簧、壓縮彈簧或彈性橡膠體，在本實施例中該 彈性件82是一壓縮彈簧。The second interlocking lock 73. The second group frame 71 has a large diameter section 7 ιι, a small diameter section 712 extending from the large diameter section 711 and permeable to the first group frame 61, and a plurality of limiting slots disposed in the small diameter section 712. 713, and a bearing surface 714 located in the group frame 61 of the large and small diameter segments 711 and 712. The second interlocking pins 73 are respectively threaded through the second straight grooves 47 of the base cylinder 3 and are respectively slidably coupled to the second cam grooves 57 of the cam barrel 5. It should be noted that the number of lenses of the mirror group units 6 and 7 can be adjusted according to the purpose of use of the telescopic lens (for example, a telescope head or a wide-angle lens), and the first lens 62 and the second lens 72 can be The number is changed to two or three. The light shielding unit 8 includes a light shielding seat 81 which is disposed in the second group frame 71 of the second mirror group unit 7 and is movable along the optical axis γ direction, and a centrally disposed. The light shielding seat 81 and the second The elastic member 82 between the bearing faces 714 of the group frame 71. The light-shielding seat 81 has a ring-shaped body 811 disposed on the small-diameter section 712, a plurality of limiting blocks 812 formed on one of the inner ring faces 816 of the body 811 and respectively immersed in the limiting slots 713, and a fixed block 812. a claw 813, a plurality of limiting legs 814 extending from the body 811 to the base 2, and a positioning slot 815 corresponding to the bearing surface 714 of the second group frame 71 and for the elastic member 82 to be embedded therein, wherein Each of the limiting legs 814 has a connecting portion 817 extending from the body 811 to the base 2, and a connecting portion 817 extends and is slidably connected to the straight groove 42 of the straight feeding cylinder 4 and has a top bearing The limit segment 818 of the face 819. The elastic member 82 can push the light shielding seat 8 to move along the optical axis γ direction to the first lens 62 of the first mirror group unit 6. It should be noted that the elastic member 82 can be a disc spring or a compression spring. Or an elastic rubber body, which is a compression spring in this embodiment.
❹ 該防塵蓋裝置9是蓋設於該第一鏡群單元6之第一群 框61 ’並包括一與該第一鏡片62對應之開口 91、複數圍 繞該光轴^之防塵蓋92，及-作動爪93，該作動爪％是 1該遮光單το 8之固定爪813延伸且連動該等防塵蓋％遮 蔽或開啟該開口 91。 “驅動件30是可轉動地設置於該基筒3且穿伸出該穿 子L 33與該凸輪筒5之部分該等齒部55喷合，在本實施例 中’該驅動件30是一齒輪。 之第該元件2〇設置於該基座2且與該第二鏡群單元7 之第二鏡片72對應。 « = 3〜5 ’當使用該伸縮鏡頭進行遠距離拍攝時，是 ㈣I!!(圖未示）驅動該驅動件3〇而帶動該凸輪筒5 使該凸輪筒5之該等導引部54分別沿著 直㈣4 :;二輪溝32滑動，進而帶動該凸輪筒5與該 ^ 方向往被拍攝對象移動，同時，該等 群單凡6、7之該等連動銷63、7 分別沿該等第-、第二凸輪溝56、57滑動， 11 201013247 、71沿該光軸Y方向往被拍攝對象移動直到該第二群框71 位於-鄰近該第一群框61之遠拍位置’此時，該遮光單元 8之該等頂抵面819是分別與該直進筒4之該等擋止面41 貼抵’並帶動該遮光座81往該基座2之方向移動而壓擠該 彈性件82，使該固定爪813與該防塵蓋裝置9之作動爪％ 保持分離，以確保該等防塵蓋92開啟該開口 9ι。 參閱圖3、5、6,纽錢該伸職頭進行近距離拍攝 時，同樣是藉由該馬達驅動該驅動件3〇而帶動該凸輪筒5 繞該光軸Υ轉動，並間接帶動該第二群框71沿該光軸γ方 向遠離被拍攝對象，直到該第二群框71位於一遠離該第一 群框61之第一鏡片62的近拍位置，此時，該第二群框η 與該第一群框61之内周面611間具有一縫隙7〇，且該遮光 座81之該等頂抵面819是分別與該直進筒4之該等擋止面 41脫離，因此，該彈性件82可將該遮光座81往該第一鏡 片62之方向推送而遮蔽該縫隙7〇，且由於該等限位槽 分別限制該等限位塊812沿該光軸γ方向之位移，該遮光 座81仍與該第二群框71保持滑接而不致脫離。 參閱圖3、7、8,當要將伸縮鏡頭進行收納時’藉由該 馬達驅動該驅動件30而帶動該凸輪筒5繞該光軸γ反向轉 動，使該凸輪筒5、該直進筒4與該等鏡群單元6、7沿該 光軸Υ方向往該基座2移動，直到該第二群框71位於一鄰 近該基座2之收納位置時，該防塵蓋裝置9之作動爪93是 與該遮光座81之固定爪813頂抵而連動該等防塵蓋92遮 蔽該開口 91，且該第一群框61是抵壓該遮光座81而壓縮 201013247 該彈性件82，另外，該等限位腳814是分別擇抵於該等擋 塊21，可確保該作動爪93與該固定爪813相頂抵。 經由上述說明，可將本發明之優點歸納如下： 一、可避免非預期感光：當該第二群框71位於近拍位 置時’藉由該彈性件82推送該遮光座81沿該光轴γ方向 往該第鏡片62移動而遮蔽該縫隙70，可避免如習知該伸 賴頭1外部之紐投射至該感光元件18,造成該感光元 件18非預期感光而發生洩光之情形。 Ο 一、可降低製造成本：由於該遮光座Μ之固定爪 是由該本體8U面對該第一群框61之一端面81〇 (見圖6 )直線延伸，因此相較於習知該驅動爪143呈彎折之型式 除了可使該遮光座81之射出模具易於製作外，還可降低 該遮光座8丨射出成型後進行拔模之時間，進而降低製造成 本0 惟以上所述者，僅為本發明之較佳實施例而已，當不 ㉟以此限定本發明實施之範圍，即大凡依本發明申請專利 9 襲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】 圖1是-立體分解圖，說明現有一種伸縮鏡頭； 圖2是一剖面示意圖，說明—第二鏡群單元位於一近 拍位置時之情形； 圖3是一立髏分解圖，說明本發明可防止洩光的伸縮 鏡頭之一較佳實施例； 13 201013247 圖4是一剖面示意圖，說明一第二群框位於一遠拍位 置時之情形； 圖5是一剖面示意圖，說明一遮光座之一頂抵面與一 直進筒之擋止面相頂抵時之情形； 圖6是一剖面示意圖，說明該第二群框位於一近拍位 置時之情形； 圖7是一剖面示意圖，說明該第二群框位於一收納位 之It形，其中一基筒省略未繪出；及 圖8是一剖面示意圖，今 .-.^ 抵時之忤^ ^ 說明一作動爪與一固定爪相頂 形’其中該基筒省略未繪出。The dust cover device 9 is disposed on the first group frame 61 ′ of the first mirror group unit 6 and includes an opening 91 corresponding to the first lens 62 , a plurality of dust covers 92 surrounding the optical axis, and - Actuating claw 93, the actuating claw % is 1 and the fixing claw 813 of the light shielding sheet τ 8 extends and interlocks the dust cover to shield or open the opening 91. The driving member 30 is rotatably disposed on the base cylinder 3 and extends through the portion of the wearer L 33 and the portion of the cam barrel 5, and in the embodiment, the driving member 30 is a The first element 2 is disposed on the base 2 and corresponds to the second lens 72 of the second mirror unit 7. «= 3~5 'When using the telescopic lens for long-distance shooting, it is (four) I! (not shown) driving the driving member 3 to drive the cam barrel 5 to slide the guiding portions 54 of the cam barrel 5 along the straight (four) 4:; two-wheel groove 32, thereby driving the cam barrel 5 and the ^ The direction moves toward the object to be photographed, and at the same time, the interlocking pins 63, 7 of the group members 6, 7 slide along the first and second cam grooves 56, 57, respectively, 11 201013247, 71 along the optical axis The Y direction moves to the subject until the second group frame 71 is located at a distance from the first group frame 61. At this time, the abutting surfaces 819 of the shading unit 8 are respectively associated with the straight tube 4 The blocking surfaces 41 are in contact with each other and move the light shielding seat 81 toward the base 2 to press the elastic member 82 to prevent the fixing claws 813 from being dustproof. The claws of the device 9 are kept separated to ensure that the dust cover 92 opens the opening 9. Referring to Figures 3, 5 and 6, when the money is used for close-up shooting, the drive is also driven by the motor. The third cylinder frame 7 rotates around the optical axis ,, and indirectly drives the second group frame 71 away from the object in the optical axis γ direction until the second group frame 71 is located away from the first group. a close-up position of the first lens 62 of the frame 61. At this time, the second group frame η and the inner circumferential surface 611 of the first group frame 61 have a gap 7〇, and the top of the light-shielding seat 81 is offset. The surface 819 is respectively detached from the blocking surfaces 41 of the straight-moving cylinder 4, so that the elastic member 82 can push the light-shielding seat 81 toward the first lens 62 to shield the slit 7〇, and The limiting slot respectively limits the displacement of the limiting block 812 along the optical axis γ direction, and the light blocking seat 81 still slides with the second group frame 71 without being detached. Referring to Figures 3, 7, and 8, when When the telescopic lens is stored, the driving of the driving member 30 by the motor drives the cam barrel 5 to rotate in the opposite direction around the optical axis γ. Moving the cam barrel 5, the straight-moving cylinder 4 and the mirror group units 6, 7 in the direction of the optical axis toward the base 2 until the second group frame 71 is located in a storage position adjacent to the base 2. The actuating claw 93 of the dust cap device 9 abuts against the fixing claw 813 of the light shielding seat 81, and the dust cover 92 shields the opening 91, and the first group frame 61 is pressed against the light blocking seat 81. 201013247 The elastic member 82, in addition, the limit legs 814 are respectively selected to the stoppers 21, and the actuating claws 93 are ensured to abut against the fixed claws 813. The advantages of the present invention can be obtained through the above description. The following are summarized as follows: 1. Unexpected sensitization can be avoided: when the second group frame 71 is in the close-up position, the slidable seat 81 is pushed by the elastic member 82 to move toward the first lens 62 along the optical axis γ direction to shield the The slit 70 can be prevented from being projected onto the photosensitive member 18 as is conventionally caused to cause the photosensitive member 18 to be undesirably photosensitive and leaked. Ο First, the manufacturing cost can be reduced: since the fixing claw of the light shielding seat is linearly extended by the body 8U facing one end face 81〇 (see FIG. 6) of the first group frame 61, the driving is compared with the conventional one. In addition to the fact that the claw 143 is bent, the injection mold of the light-shielding seat 81 can be easily manufactured, and the time for performing the drafting after the light-shielding seat 8 is formed by injection can be reduced, thereby reducing the manufacturing cost, but only the above, only For the preferred embodiment of the present invention, the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the invention according to the invention and the description of the invention are still Within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a conventional telescopic lens; FIG. 2 is a schematic cross-sectional view showing a state in which a second mirror group unit is located at a close-up position; FIG. 3 is a vertical exploded view. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 4 is a cross-sectional view showing a second group frame in a telephoto position; FIG. 5 is a schematic cross-sectional view showing a preferred embodiment of the present invention; FIG. 6 is a cross-sectional view showing a state in which the second group frame is located at a close-up position; FIG. 7 is a cross-sectional view. The schematic diagram shows that the second group frame is located in a shape of a storage position, wherein a base cylinder is omitted and not shown; and FIG. 8 is a schematic cross-sectional view of the present invention. The fixed claw phase is shaped 'where the base cylinder is omitted and not drawn.
14 201013247 【主要元件符號說明】14 201013247 [Main component symbol description]
2…… ••…基座 57…… …·第二凸輪溝 20.… .....感光元件 6 ....... •…第一鏡群單元 21…· ••…擋塊 61…… •…第一群框 3…… ••…基筒 611… —内周面 30 ••…驅動件 62…… …·第一鏡片 31.···. …··導槽 63…… •…第 連動銷 32····. …··凸輪溝 7 ....... •…第二鏡群單元 33•…· …··穿孔 70…… •…縫隙 4…… ••…直進筒 71…… 第《一群框 41 -----擋止面 711 ··· …·大徑段 42 .....直溝 712 ··· …·小徑段 43.··· •…導引部 713 …·限位槽 44.···. .....外周面 714 ··· …·承罪面 45..… •…凸出部 72…… …·第二鏡片 46...·. •…第一直進溝 73…… …·第二連動銷 47••… •…第二直進溝 8 ....... —遮光早元 5…… •…凸輪筒 81…… …·遮光座 51.···· —内周面 810 …. …端面 52..... •…迴轉槽 811 ··· …·本體 53 •…外周面 812 …限位塊 54·.··. •…導引部 813 ···· …固定爪 55..··· …·齒部 814 ··· …限位腳 56·.... …·第一凸輪溝 815 ··· …定位槽 15 201013247 816 ··· •…内環面 9…… …·防塵蓋裝置 817 ··· •…連接段 91 ·.··. ….開口 818… —限位段 92 •…防塵蓋 819… •…頂抵面 93 .....作動爪 82·.··. •…彈性件 Y…… .....光軸2...... ••... pedestal 57............·Second cam groove 20...... photosensitive element 6 ....... •...first mirror group unit 21...· ••...stop 61... •...first group frame 3... ••...base cylinder 611... - inner circumferential surface 30 ••...drive member 62...the first lens 31.···....the guide groove 63... ... •...Digital drive pin 32····.......·Cam groove 7 ....... •...Second mirror group unit 33•...····Perforation 70... •...Gap 4... •...straight into the tube 71... The first group of boxes 41 ----- stop surface 711 ····· large diameter section 42 ..... straight groove 712 ··· ...· small diameter section 43.·· · •... Guide 713 ...·Restricted slot 44.···...... outer peripheral surface 714 ····· confession surface 45.....•...protrusion 72...............Second Lens 46...·.•...first straight groove 73.........·second linkage pin 47••... •...second straight groove 8 ....... —shading early 5...•...cam Cartridge 81............·light-shielding seat 51.····· inner circumferential surface 810 .... ...end surface 52..... •...revolving groove 811 ··· ...· body 53 •... Peripheral surface 812 ... Limiting block 54 ····. •... Guide part 813 ···· ...fixing claw 55..·····Tooth part 814 ··· ...Limiting foot 56·.... ...·first cam groove 815 ···...positioning groove 15 201013247 816 ··· •... inner ring surface 9... ...·dust cover device 817 ··· •...connection segment 91 ·...... opening 818 ... —Limiting section 92 •...Dust cover 819... •...Abutment surface 93 ..... Actuating claw 82·.··.•...elastic element Y........... optical axis
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