JPS61162016A - Lens barrel - Google Patents
Lens barrelInfo
- Publication number
- JPS61162016A JPS61162016A JP258985A JP258985A JPS61162016A JP S61162016 A JPS61162016 A JP S61162016A JP 258985 A JP258985 A JP 258985A JP 258985 A JP258985 A JP 258985A JP S61162016 A JPS61162016 A JP S61162016A
- Authority
- JP
- Japan
- Prior art keywords
- operating member
- arm
- groove
- optical axis
- movable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はレンズ鏡筒に関し、特にレンズ鏡筒の構成部品
の一部品を合成樹脂材料にて成形加工で作り、合成樹脂
材料の成形加工によって成形した場合の鏡筒と鏡筒間の
ガタつきを抑えることのできるレンズ鏡筒に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens barrel, and particularly relates to a lens barrel in which one of the constituent parts of the lens barrel is made of a synthetic resin material by molding, and a lens barrel formed by molding the synthetic resin material. The present invention relates to a lens barrel that can suppress rattling between lens barrels.
（従来技術の説明）
第１図は単一操作部材１の回転によってフォーカス作用
を行ない、直進によってズーム作用を行なうズームレン
ズ鏡筒を示す。(Description of Prior Art) FIG. 1 shows a zoom lens barrel in which a single operating member 1 performs a focusing action by rotating it and a zooming action by moving it straight.
操作部材ｌの内側にはフォーカスレンズＬ１を保持する
移動筒２を配し、操作部材１の直進溝１ａと移動筒２に
植設したビン１０と係合する。移動筒２は内筒４とヘリ
コイド結合するとともに、操作部材ｌとは操作部材ｌの
内側に伸びた壁部１ｂと突起−溝又は微少リードネジ等
にて係合している・
６は内筒４を嵌合する固定筒であり、内筒４の外周に固
定したビン７が固定筒６の直進溝６ｂと係合している。A movable barrel 2 that holds a focus lens L1 is disposed inside the operating member 1, and engages with a straight groove 1a of the operating member 1 and a bottle 10 implanted in the movable barrel 2. The movable cylinder 2 is helicoidally connected to the inner cylinder 4, and the operating member 1 is engaged with a wall portion 1b extending inwardly of the operating member 1 by a protrusion-groove or minute lead screw. 6 is the inner cylinder 4. The pin 7 fixed to the outer periphery of the inner cylinder 4 is engaged with the straight groove 6b of the fixed cylinder 6.
８は内筒４の内側に嵌装したズームレンズＬ２を保持す
るレンズ保持筒であり、植設ビン９ｔよ内筒４と固定筒
６に形成したそれぞれのカム４ａ・６ａの交点に係合す
る。Ｌ３は内筒４に固定した補正用レンズ。Reference numeral 8 denotes a lens holding tube that holds the zoom lens L2 fitted inside the inner tube 4, and the implant bin 9t engages with the intersection of the respective cams 4a and 6a formed on the inner tube 4 and the fixed tube 6. . L3 is a correction lens fixed to the inner tube 4.
３は固定筒６の外側に被せた外装筒である。Reference numeral 3 denotes an exterior cylinder that covers the outside of the fixed cylinder 6.
上記構成のレンズ鏡筒は操作部材ｌを光軸まわりに回転
することにより移動筒２をビン１０を介して回転させ、
移動筒２はヘリコイドによって光軸平行方向に進退して
フォーカス作用が行なわれる。The lens barrel configured as described above rotates the movable barrel 2 via the bin 10 by rotating the operating member l around the optical axis.
The movable barrel 2 is moved back and forth in a direction parallel to the optical axis by a helicoid to perform a focusing action.
ズーム作用は操作部材ｌを光軸平行方向番こ直進操作す
ることにより行なわれる。直進操作側こより内筒４も直
進し、これによりレンズ保持筒８はカム４ａ・６ａの交
点のリードによって移動され、レンズＬ２とＬ３の移動
によってズーム作用が行なわれる。The zooming action is performed by moving the operating member 1 straight forward in a direction parallel to the optical axis. From the straight-moving operation side, the inner cylinder 4 also moves straight, whereby the lens holding cylinder 8 is moved by the lead of the intersection of the cams 4a and 6a, and a zooming effect is performed by the movement of the lenses L2 and L3.
上記構成のレンズ鏡筒の一部例えば操作部材ｌを合成樹
脂材料で成形加工した場合に直進溝Ｌａの溝幅寸法精度
が得にくく直進溝１ａの溝幅と係合ビンｌＯのビン外径
との間のガタが生じる。このガタは近年高倍率のズーム
レンズが要求され、ズームレンズのフォーカス作用の操
作精度の高精度が要求されるレンズ鏡筒の大きな欠点と
なっている。When a part of the lens barrel with the above configuration, for example, the operating member l, is molded from a synthetic resin material, it is difficult to obtain the groove width dimension accuracy of the straight groove La, and the groove width of the straight groove 1a and the bottle outer diameter of the engaging pin lO are difficult to obtain. There will be some play between the two. In recent years, this backlash has become a major drawback in lens barrels, which require high-magnification zoom lenses and require high precision in the focusing operation of zoom lenses.
（発明の目的）
本発明の第１の目的は上記のレンズ鏡筒における操作部
材ｌの光軸まわりのガタを解消することができるレンズ
鏡筒を提供することにある。(Object of the Invention) A first object of the present invention is to provide a lens barrel that can eliminate the backlash around the optical axis of the operating member l in the lens barrel.
本発明の第２の目的は前記レンズ鏡筒の一部品、移動筒
２を合成樹脂材料で作り、操作部材１の光軸まわりの回
転操作の操作性の向上例えば１回転繰作の適度の回転負
荷を与えて回転時の回転力が軽くもなく、又重くもない
操作性を得ることにある。A second object of the present invention is to improve the operability of the rotation operation of the operating member 1 around the optical axis by making one part of the lens barrel, the movable tube 2, from a synthetic resin material. The purpose is to obtain operability in which the rotational force during rotation is neither light nor heavy by applying a load.
更に本発明の他の目的は操作部材の回転による物理的強
度の向上にある、即ち、前述第１図のように直進溝−ビ
ン係合による操作部材ｌの回転力を移動筒２に伝達する
構成は充分な回転力を移動筒に伝えられない。本発明は
この点の改善をも目的とする。Another object of the present invention is to improve the physical strength of the operating member by rotating it, that is, to transmit the rotational force of the operating member l to the movable cylinder 2 through the linear groove-bin engagement as shown in FIG. The configuration does not allow sufficient rotational force to be transmitted to the moving cylinder. The present invention also aims to improve this point.
（発明の詳細な説明） 第２図乃至第５図は本発明実施例の各要部を示す。(Detailed description of the invention) 2 to 5 show the main parts of the embodiment of the present invention.
１１は操作部材を示し、内周面に内側に伸びる壁部１１
ａを有し、該壁部１１ａに開口部ｆｌｂを設けるととも
に、開口部１１ｂの周辺から光軸平行方向に伸びる＠ｌ
の腕部１１ｃを有している。Reference numeral 11 indicates an operating member, and a wall portion 11 extending inward on the inner circumferential surface.
a, an opening flb is provided in the wall portion 11a, and @l extends from the periphery of the opening 11b in a direction parallel to the optical axis.
It has an arm portion 11c.
１２は操作部材１１の内側に配した不図示フォーカスレ
ンズを保持した移動筒で内筒１３とヘリコイド結合して
いる。Reference numeral 12 denotes a movable cylinder that holds a focus lens (not shown) arranged inside the operating member 11, and is helicoidally coupled to the inner cylinder 13.
移動筒１２の光軸平行方向の周端部からは第２の腕部１
２ａが伸長し、該第２の腕部１２ａは前記開口部１１ｂ
の中に挿通し、腕部１２ａの側面は開口部の内側面と嵌
合している。From the peripheral end of the movable barrel 12 in the direction parallel to the optical axis, the second arm 1
2a is extended, and the second arm 12a is connected to the opening 11b.
The side surface of the arm portion 12a fits into the inner surface of the opening.
前記第２の腕部１２ａの略中央には前記第１の腕部１１
ｃが挿通する溝１２ｂを形成する。該溝１２ｂの溝幅Ｄ
１は第１の腕部１１ｃの幅Ｄ２より多少大きくし、両者
の間に若干の隙間を設けるようにする。前記移動筒１２
の溝１２ｂの光軸平行方向の長さは前記操作部材１１の
光軸まわりの回転フォーカス操作による前記第１の腕部
ｌｉｅとの嵌合長さが充分となる長さに設定する。移動
筒１２の壁部１１ａと内筒１３との係合間係は第１図と
同様に構成する。The first arm portion 11 is located approximately at the center of the second arm portion 12a.
A groove 12b is formed through which the groove 12c is inserted. Groove width D of the groove 12b
1 is made somewhat larger than the width D2 of the first arm portion 11c, and a slight gap is provided between the two. The movable tube 12
The length of the groove 12b in the direction parallel to the optical axis is set to a length that provides a sufficient length for fitting with the first arm part lie when the operating member 11 is rotated and focused around the optical axis. The engagement between the wall portion 11a of the movable cylinder 12 and the inner cylinder 13 is constructed in the same manner as shown in FIG.
前記操作部材１１、移動筒１２、内筒１３以外の鏡筒の
構成部品、レンズ保持筒、固定筒、外装筒及びレンズ光
学系り、−Ｌ３は第１図と同じである。Components of the lens barrel other than the operating member 11, movable barrel 12, inner barrel 13, lens holding barrel, fixed barrel, exterior barrel, and lens optical system -L3 are the same as in FIG.
上記第２図乃至第５図構成のレンズ鏡筒の操作を次に説
明する。The operation of the lens barrel shown in FIGS. 2 to 5 will now be described.
フォーカス作用のために操作部材１１を光軸まわりに回
転すると操作部材１１と内筒１３は突起−周溝又は微少
リードにて係合しているので相対回転する。When the operating member 11 is rotated around the optical axis for the purpose of focusing, the operating member 11 and the inner tube 13 rotate relative to each other because they are engaged with each other through a protrusion-circumferential groove or a minute lead.
操作部材１１の回転は前記開口部１１ｂと第２の腕ｇＢ
１２ａとの係合関係により移動筒１２に伝わる。The rotation of the operating member 11 is caused by the opening 11b and the second arm gB.
It is transmitted to the movable cylinder 12 due to the engagement relationship with 12a.
移動筒１２は内筒１３とヘリコイド結合し又内筒１３は
光軸まわり方向の回転が規制されているので光軸平行方
向に直進移動し、フォーカスレンズによるフォーカスが
行なわれる。The movable cylinder 12 is helicoidally coupled to the inner cylinder 13, and since the inner cylinder 13 is restricted from rotating around the optical axis, it moves straight in a direction parallel to the optical axis, and focusing is performed by a focus lens.
操作部材１１を光軸平行方向に直進操作すると内筒１３
との係合関係及び内筒の光軸まわり回転規制により内筒
１３を光軸平行方向に移動する。内筒１３の移動は第１
図に示したように内筒と固定筒に設けたカムの交点のリ
ードによりレンズ保持筒８が所定の移動量に従って動き
、更に内筒１３はレンズ移動筒１２とヘリコイド結合し
ているのでフォーカス用レンズＬｌ も共に動き、レン
ズＬ、−Ｌ３によってズーム作用が行なわれる。When the operating member 11 is operated straight in a direction parallel to the optical axis, the inner cylinder 13
The inner cylinder 13 is moved in a direction parallel to the optical axis due to the engagement relationship with the inner cylinder and rotation restriction of the inner cylinder around the optical axis. The movement of the inner cylinder 13 is the first
As shown in the figure, the lens holding tube 8 moves according to a predetermined amount of movement by the lead at the intersection of the cams provided on the inner tube and the fixed tube, and the inner tube 13 is helicoidally connected to the lens moving tube 12, so that it can be used for focusing. The lens Ll also moves together, and the zooming effect is performed by the lenses L and -L3.
上記構成のレンズ鏡筒はレンズ移動筒１２を合成１
樹脂材料にて作ると第２の腕部１２ａはその根元部１
２ａ、に対し光軸まわり方向の反り方向Ａ１・Ａ２に対
する弾性を有する。該弾性は操作部材１１を光軸まわり
に回転する際、開口部１１ｂに嵌合した第２の腕部１２
ａが操作部材１１の回転力を伝えられ回転する際に、回
転力が弱く、移動筒１２と内筒１３のヘリコイド結合が
滑らかな場合第２の腕部１２ａと開口部１２ｂとの嵌合
によって回転力が伝えられる。そして、回転力が大きい
と第２の腕部１２ａは第５図に示すＡ、又はＡ２方向に
たわみ第１の腕部１１ｃと＠２の腕部の溝１２ｂの側面
１２ｂ、又は１２ｂ２に当たって移動筒に回転が伝えら
れる。The lens barrel with the above configuration combines the lens moving barrel 12 with 1
When made of resin material, the second arm portion 12a has its base portion 1
2a, it has elasticity in the warp directions A1 and A2 in the direction around the optical axis. When the operating member 11 is rotated around the optical axis, the elasticity of the second arm 12 fitted into the opening 11b
When a is rotated by being transmitted with the rotational force of the operating member 11, if the rotational force is weak and the helicoid coupling between the movable cylinder 12 and the inner cylinder 13 is smooth, the second arm part 12a and the opening part 12b fit together. Rotational force is transmitted. When the rotational force is large, the second arm 12a bends in the direction A or A2 shown in FIG. rotation is transmitted to.
上記の本発明の構成は第２の腕部１２ａと開口部１１ｂ
による嵌合と、第１の腕部１１ｃと溝１２ｂの係合によ
る補助的係合によって強弱の回転力を伝えることができ
る。The configuration of the present invention described above includes the second arm portion 12a and the opening portion 11b.
A strong and weak rotational force can be transmitted by the fitting between the first arm portion 11c and the auxiliary engagement between the first arm portion 11c and the groove 12b.
更に本発明は移動筒１２と操作部材１１を合成樹脂材料
にて作ることにより部品点数の減少を図ることができ、
組立の自動化を促進し、レンズ鏡筒のコストを低減する
ことができた。Furthermore, the present invention can reduce the number of parts by making the movable cylinder 12 and the operating member 11 from synthetic resin materials.
We were able to promote automation of assembly and reduce the cost of lens barrels.
第１図は従来例としてあげたズームレンズの断面図。
第２図乃至第５図は本発明要部を示し、第２図は操作部
材１１と移動筒及び内筒の部分断面を示す図。
第３図は操作部材１１と移動筒１２の平面関係を示す図
。
第４図は第２図Ｂ−Ｂ断面方向の移動筒の腕部と操作部
材の開口部の嵌合間係及び溝部１２ｂと腕部１１ｃの係
合関係を示す図。
第５図は移動筒の腕部と操作部材の開口部の各斜視図。
１・１１−ｍ−操作部材、 ２・１２−−一移動筒４・
１３−ｍ−内筒、 １ｌｃ−−一第１の腕部１１ｂ
−−一開口部、 １２ａ−−一第２の腕部１２ｂ−
−一溝FIG. 1 is a sectional view of a zoom lens taken as a conventional example. 2 to 5 show essential parts of the present invention, and FIG. 2 is a partial cross-sectional view of the operating member 11, the movable cylinder, and the inner cylinder. FIG. 3 is a diagram showing the planar relationship between the operating member 11 and the movable cylinder 12. FIG. 4 is a diagram showing the fitting relationship between the arm portion of the movable cylinder and the opening of the operating member and the engagement relationship between the groove portion 12b and the arm portion 11c in the cross-sectional direction taken along line B-B in FIG. FIG. 5 is a perspective view of the arm of the movable cylinder and the opening of the operating member. 1.11-m-operation member, 2.12--one moving cylinder 4.
13-m-inner cylinder, 1lc--first arm portion 11b
--One opening part 12a--One second arm part 12b-
−One groove
Claims (2)
と、 前記移動筒とヘリコイド結合した内筒を有 し、 前記操作部材と前記内筒は光軸まわりに相対回転し、光
軸平行方向には一緒に直進移動 し、 前記操作部材の内周面に内側に伸びる壁部を設け、該壁
部の一部に開口部を設けるとともに壁部より光軸平行方
向に第１の腕部を伸長する、更に、 前記移動筒に前記開口部の側面と嵌合する第２の腕部を
設け、前記第２の腕部の略中央に前記第１の腕部が挿入
する溝部を形成したことを特徴とするレンズ鏡筒。(1) It has an operating member, a movable tube disposed inside the operating member, and an inner tube helicoidally coupled to the movable tube, and the operating member and the inner tube rotate relative to each other around the optical axis. A wall part extending inward is provided on the inner peripheral surface of the operating member, an opening is provided in a part of the wall part, and a first arm extends from the wall part in a direction parallel to the optical axis. Further, a second arm part is provided in the movable cylinder to fit into a side surface of the opening part, and a groove part into which the first arm part is inserted is formed approximately at the center of the second arm part. A lens barrel characterized by:
前記第２の腕部の溝部の幅は前記第１の腕部の溝部の幅
は前記第１の腕部の幅の寸法より大きくしたことを特徴
とする特許請求の範囲第（１）項記載のレンズ鏡筒。(2) The movable tube is made by molding a synthetic resin material,
Claim (1) characterized in that the width of the groove of the second arm is larger than the width of the groove of the first arm. lens barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60002589A JPH0646254B2 (en) | 1985-01-10 | 1985-01-10 | Lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60002589A JPH0646254B2 (en) | 1985-01-10 | 1985-01-10 | Lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61162016A true JPS61162016A (en) | 1986-07-22 |
| JPH0646254B2 JPH0646254B2 (en) | 1994-06-15 |
Family
ID=11533564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60002589A Expired - Lifetime JPH0646254B2 (en) | 1985-01-10 | 1985-01-10 | Lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646254B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56139111U (en) * | 1980-03-24 | 1981-10-21 | ||
| JPS57199303U (en) * | 1981-06-12 | 1982-12-17 | ||
| JPS5953308U (en) * | 1982-09-30 | 1984-04-07 | 株式会社ニコン | zoom lens barrel |
-
1985
- 1985-01-10 JP JP60002589A patent/JPH0646254B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56139111U (en) * | 1980-03-24 | 1981-10-21 | ||
| JPS57199303U (en) * | 1981-06-12 | 1982-12-17 | ||
| JPS5953308U (en) * | 1982-09-30 | 1984-04-07 | 株式会社ニコン | zoom lens barrel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0646254B2 (en) | 1994-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |