JPS5838933A - Shielding device for zoom lens barrel - Google Patents

Abstract

PURPOSE:To prevent the exposure of the contents in a containing member for containing driving devices for controlling the movement of a lens and entry of dust therein by disposing a shielding member for closing the opening part of said member. CONSTITUTION:When an operating member 7 is rotated in either of arrow A, B directions, the rotation thereof is transmitted to a revolving shaft 11 and a gear 17 via a stationary shaft 7a, and bevel gears 10, 14. Since the gear 17 is interlocked to a gear for driving a focusing lens, a lens holding member 8a moves forward or backward in the optical axis direction, whereby focusing is accomplished. When the member 7 is moved in the direction parallel with the optical axis as shown in arrows C, D, a cord member 25 which is fixed to an angle 91 rotates on pulleys 23, 24, and as the member 25 moves, the lens for zooming is moved in the optical axis direction, whereby zooming is accomplished. Further, a shielding member 30 is disposed turnably around the containing member and since said member is so constituted as to move cooperatively with the movement of the member 7, the member 30 closes an opening part 6a and prevents the entry of dust.

Description

【発明の詳細な説明】 本発明線ズームレンズ鏡胴に関し特に、操作部材の光軸
方向の移動操作でズーミング用し／ズ移動制する構造を
有するズームレンズに関する。操作部材の光軸方向移動
に連動してズーミング用レンズを移動制御するために該
操作部材に応動してレンズを駆動する駆動装置が必要で
あり、該駆動装置を収納する収納部材を介して前記操作
部材と駆動装置に係合関係を保つ必要があり、更に、操
作部材が前記収納部材の開口した部分又は溝、孔を経て
前記駆動装置と保合関係を保つ場合には該操作部材の光
軸方向の移動の際に前記開口部は開いたままであシ、内
の駆動装置が露出したままにな夛、外観・美観上好まし
くなく、更に粉塵が入って悪い結果になる０本発明の目
的は前述のように操作部材の光軸方向の操作によってズ
ーミング作用を行なうレンズにおいて、レンズを移動制
御する駆動装置を収納する収納部材に設は九開口部を遮
蔽する装置を提供することにある〇 更に本発明の第２の目的は前記駆動装置を収納する収納
部材に前記開口部を塞ぐｍｉｉ部材を配設し、前記１ｉ
ｕｉ部材が操作部材の移動に連動するように構成し、ズ
ームレンズ鏡胴全体の構成の簡易化を図ることを目的と
する０ 以Ｆに図を径間して本発明の一実施例を詳述する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a zoom lens barrel, and particularly relates to a zoom lens having a structure in which zooming is controlled by moving an operating member in the optical axis direction. In order to control the movement of the zooming lens in conjunction with the movement of the operating member in the optical axis direction, a driving device that drives the lens in response to the operating member is required, and the It is necessary to maintain an engaged relationship between the operating member and the drive device, and furthermore, when the operating member maintains the engaged relationship with the drive device through the open portion, groove, or hole of the storage member, the light of the operating member If the opening remains open during axial movement, the driving device inside may remain exposed, which is undesirable in terms of appearance and aesthetics, and may also cause dust to enter, resulting in poor results.Objective of the Invention: The object of the present invention is to provide a device for shielding nine apertures in a lens that performs a zooming action by operating an operating member in the optical axis direction, as described above, which is installed in a housing member that houses a drive device that controls the movement of the lens. Furthermore, a second object of the present invention is to dispose an mii member that closes the opening in the storage member that stores the drive device, and to
An embodiment of the present invention will be described in detail with reference to the drawings from 0 to F, which aims to simplify the configuration of the entire zoom lens barrel by configuring the ui member to move in conjunction with the movement of the operating member. Describe.

第１図・第２図は本発明に適用するズームレンズ鏡胴の
各レンズ（合焦用レンズ！・変倍用レンズ■・補正用レ
ンズ■・リレー用レンズ■〕の相対位置関係を示し、第
３図は前記谷レンズを移動するための駆動機構を示す。Figures 1 and 2 show the relative positional relationship of each lens (focusing lens!, variable power lens ■, correction lens ■, relay lens ■) of the zoom lens barrel applied to the present invention. FIG. 3 shows a drive mechanism for moving the valley lens.

図において、１は第１固定筒２の後端に取り付けられた
マウントリングであり全体をして示公知のバヨネットマ
ウントリン−グークリ・ニーマウントリングである。３
はズーミング作用に寄与するレンズ■・■を収納する第
２固定簡であシ、第１固定筒に固定される。８は合焦用
レンズＩを収納する第３固定筒であシ第２固定簡に固定
される。８ａは合焦用レンズ■のレンズ保持部材に設け
た歯部であシ歯車８ｂがかみ合っている。In the figure, reference numeral 1 denotes a mount ring attached to the rear end of the first fixed barrel 2, and the whole is a known bayonet mount ring-gook knee mount ring. 3
is a second fixed barrel that houses lenses (1) and (2) that contribute to the zooming action, and is fixed to the first fixed barrel. Reference numeral 8 denotes a third fixed barrel that houses the focusing lens I and is fixed to the second fixed barrel. Reference numeral 8a is a toothed portion provided on the lens holding member of the focusing lens (2), with which the toothed gear 8b is meshed.

第３図は前記レンズ■・■・■を駆動する駆動機構を示
す斜視図である０６は後述する各部材を収納する筐体ケ
ースであり、該ケース６は前記第２固定筒３に固定又は
着脱可能に構成する０７は操作部材の操作ノブであり、
該操作ノブはその固定軸７ａが前記ケース６の光軸と平
行方向に切った長溝６ａを貫ぬきケース内に位置し、そ
の先端部にカサ歯車１ｏが固定しである０該カサ歯車１
ｏは他のカサ歯車１４とがみ合っており、該カサ歯車１
４は回転軸１１に嵌装されている。該固定軸１１はそ゛
の両端がケース６に植設した受板１２・１３に軸支され
てお　　・す、更に、前記カサ歯車１４は該回転軸１１
とはキー嵌合しておりカサ歯車１４にネジｋｈ固定した
キ一部材１５が前記回転軸１１に形成した長＠ｌｌａに
キー係合している。９は前記固定−ノー ルでアシ、該ネングル９はその一端に切欠部９ａを設は
ケース６、に植設した軸板１９・２゜ようにしている。FIG. 3 is a perspective view showing a drive mechanism for driving the lenses ■, ■, and ■. Reference numeral 06 is a housing case that houses each member described later, and the case 6 is fixed to the second fixed tube 3 or 07, which is configured to be detachable, is an operation knob of an operation member;
The operating knob has a fixed shaft 7a that passes through a long groove 6a cut in a direction parallel to the optical axis of the case 6, and is located inside the case, and a bevel gear 1o is fixed to the tip thereof.
o is meshed with another bevel gear 14, and the bevel gear 1
4 is fitted onto the rotating shaft 11. Both ends of the fixed shaft 11 are supported by support plates 12 and 13 embedded in the case 6.Furthermore, the bevel gear 14 is supported by the rotating shaft 11.
A key member 15 fixed to the bevel gear 14 with a screw kh is keyed to a length @lla formed on the rotating shaft 11. Reference numeral 9 denotes the above-mentioned fixing knob, and the bolt 9 has a notch 9a at one end thereof, and is shaped like a shaft plate 19.2 degrees embedded in the case 6.

歯車１７は前記回転軸１１に介し−Ｃ係合関係７、保た
れ、い、。八は紐う材であシ、該紐部材２５は前記ケー
ス６に植設された受板２１・２２に保持されているプー
リ一部材２５は回転する０２６は前記紐部材２５に固定
された連結ビンであり、該一連結ピ／２６は係止部材４
と係合する。− 不 即ち前記係合部材４は鴇図示のレンズ保持鏡胴（又はレ
ンズ保持枠）に固定され、かつ前記連結ビン２６が係合
するだめの足部４ａ・４ｂを有し、足部４１・４ｂの間
に連結ビン２６を挾持することが６丁能となる。The gear 17 is maintained in a -C engagement relationship 7 with the rotating shaft 11. 8 is a string member, and the string member 25 is a pulley member held on the receiving plates 21 and 22 planted in the case 6. The member 25 rotates. 026 is a connection fixed to the string member 25. The series connecting pin/26 is a locking member 4.
engage with. - That is, the engaging member 4 is fixed to the lens holding lens barrel (or lens holding frame) shown in the figure, and has foot portions 4a and 4b with which the connecting pin 26 engages, and has foot portions 41 and 4b. It is possible to hold the connecting bottle 26 between 4b and 4b.

第５図はケース６内の構成部品がケース６のり、ケース
６の４隅に植設した固定軸にガイドローラー２８ａ・２
８ｂ・２８ｃ・２８ｄを嵌合し、咳ガイドロー２−にて
ａｈａ−幕部材３０を保持させる０穴３０ａは前記固定
軸７ａの貫入用である上記構成の駆動装置において、操
作部材７を矢印Ａ−Ｂ方向いずれかに回転操作すると固
定軸７ａ・カサ歯車１０が同方向に回転し、更にとの回
転はカサ歯車１４を介して回転軸１１・歯車１７に伝わ
る。歯車１７と第１図に示す合焦用レンズｊの駆動用歯
車８ｂとは（図示の連動機構によって連動している丸め
歯車８ｂの回転によってレンズ保持部材８ａは光軸方向
に道退移動し合焦作用が行なわれる。次に操作部材７を
矢印Ｃ−Ｄに示すように光軸と平行方向に移ア 動操作すると、前記ランゲル９は固定軸７ａにア 固定され、かつ、前記紐部材２５もランゲル９に固定さ
れているの−で操作部材７のｃ−ｂ方向の移動にともな
って紐部材２５はプーリー２３・２４によって同転する
。それ数組部材２５に結ばれた連結ピン２６は前記第４
図に示すようにズーミング用レンズ■・■のレンズ保持
部材子 （湊図示）に固定した保合部材４０足部４ａ・４ｂに挾
持されている丸め紐部材２５の移動につれてズーミング
用レンズ■・四を光軸方向に移動してズーミング作用を
行なう。操作部材７のｃ−ｂ方向の移動の際にはカサ歯
車１４は回転軸１１のキー溝１１ａにキー嵌合し回転軸
１１を回転させることなく、従って合焦用レンズＩは移
動することはない。FIG. 5 shows that the components inside the case 6 are attached to the guide rollers 28a and 2 on fixed shafts installed in the four corners of the case 6.
8b, 28c, and 28d, and the hole 30a for holding the aha curtain member 30 in the cough guide row 2- is for the insertion of the fixed shaft 7a. When the rotating operation is performed in either direction A-B, the fixed shaft 7a and the bevel gear 10 rotate in the same direction, and the rotation thereof is further transmitted to the rotating shaft 11 and the gear 17 via the bevel gear 14. The gear 17 and the driving gear 8b of the focusing lens j shown in FIG. A focusing action is performed.Next, when the operating member 7 is moved in a direction parallel to the optical axis as shown by the arrow C-D, the ranger 9 is fixed to the fixed shaft 7a, and the string member 25 Since the string member 25 is also fixed to the ranger 9, the string member 25 is rotated by the pulleys 23 and 24 as the operating member 7 moves in the c-b direction. Said fourth
As shown in the figure, as the holding member 40 fixed to the lens holding member element (as shown by Minato) of the zooming lenses ■ and is moved in the optical axis direction to perform a zooming action. When the operating member 7 moves in the c-b direction, the bevel gear 14 is key-fitted into the key groove 11a of the rotating shaft 11, and the rotating shaft 11 is not rotated, so that the focusing lens I does not move. do not have.

第３図の構成において遮蔽部材３０を金属製薄膜材４は
布材１合成樹脂材等の強い材質にて作ることにより操作
部材７のｃ−−ｂ方向の移動以上のように本発明は収納
部材内に該収納部材の開口部６ａを塞ぐ遮蔽部材３０を
配することによ）収納部内の中味が露出したシ粉塵が侵
入することを防ぐことができる０ 更に、遮蔽部材３０を収納部材内の周囲に回動可能に配
し、操作部材７の移動に連動して動くように構成し九故
に遮蔽装置としての構成を簡単にすることができた。In the configuration shown in FIG. 3, the shielding member 30 is made of a strong material such as the metal thin film material 4 and the cloth material 1, such as a synthetic resin material, so that the present invention can prevent the operation member 7 from moving in the c--b direction. By arranging the shielding member 30 inside the member to close the opening 6a of the storage member, it is possible to prevent dust from entering into the exposed contents of the storage member. It is rotatably disposed around the shielding device and is configured to move in conjunction with the movement of the operating member 7. Therefore, the configuration of the shielding device can be simplified.

【図面の簡単な説明】[Brief explanation of drawings]

第１図・第２図は操作部材と各レンズの相互第４図は連
結ビン２６と係合部材４の係合関係を示す図◇第５図は
遮蔽部材の斜視図０４・・・係合部材　　　　７・・・
操作部材１０・１４・・・カサ歯車　　　１１・・・回
転軸。 特許出麩キャノン株式会社Figures 1 and 2 show the operating member and each lens. Figure 4 is a diagram showing the engagement relationship between the connecting bottle 26 and the engaging member 4. Figure 5 is a perspective view of the shielding member. 04...Engagement Part 7...
Operating members 10, 14... Bevel gear 11... Rotating shaft. Patented wheat cannon Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] （１）　　ズーミング用に寄与するレンズのレンズ保持
部材と連動し、光軸と平行方向の移動操作によって前記
レンズを移動する操作部材を有し、前記操作部材は該操
作部材の光軸と平行方向の移動操作によって前記レンズ
を移動させる丸めの駆動装置を収納する収納部材に設は
九貫通部を介して前記駆動装置と係合するとともに、前
記貫通部を遮蔽する装置を備えたことを特徴とするズー
ムレンズ鏡胴の遮蔽装置。(1) An operation member that moves the lens by a movement operation in a direction parallel to the optical axis in conjunction with a lens holding member of a lens contributing to zooming, and the operation member moves in a direction parallel to the optical axis of the operation member. A housing member that houses a round drive device that moves the lens by a moving operation of the lens is provided with a device that engages with the drive device through a nine-penetrating portion and that shields the penetrating portion. A shielding device for the zoom lens barrel. （２）前記遮蔽装置は前記操作部材と連動することを特
徴とする特許請求の範囲第１項記載のズーム・レンズ鏡
胴の遮蔽装置０(2) The shielding device 0 for a zoom lens barrel according to claim 1, wherein the shielding device is interlocked with the operating member.