JPS63132912U - - Google Patents
Info
- Publication number
- JPS63132912U JPS63132912U JP2370387U JP2370387U JPS63132912U JP S63132912 U JPS63132912 U JP S63132912U JP 2370387 U JP2370387 U JP 2370387U JP 2370387 U JP2370387 U JP 2370387U JP S63132912 U JPS63132912 U JP S63132912U
- Authority
- JP
- Japan
- Prior art keywords
- focus ring
- lens barrel
- coupling means
- coupling
- barrel
- 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
- 230000008878 coupling Effects 0.000 claims 11
- 238000010168 coupling process Methods 0.000 claims 11
- 238000005859 coupling reaction Methods 0.000 claims 11
Landscapes
- Lens Barrels (AREA)
Description
第１図は本考案の第１実施例を示すレンズ鏡筒
の距離調整機構の断面図、第２図は従来における
レンズ鏡筒の距離調整機構の断面図、第３図はレ
ンズ鏡筒の正面図、第４図は固定鏡筒とヘリコイ
ド環との嵌合部の断面図、第５図は本考案の第２
実施例を示すレンズ鏡筒の距離調整機構の正面図
である。
（主要部分の符号の説明）、１１……前群レン
ズ系、１２……後群レンズ系、１３……レンズ保
持筒、１４……フオーカスリング、１５……固定
鏡筒、１５ｂ，１５ｃ，１５ｄ……突出部、１５
ｅ……ビス、１６……ワツシヤー。
Fig. 1 is a sectional view of a lens barrel distance adjustment mechanism showing a first embodiment of the present invention, Fig. 2 is a sectional view of a conventional lens barrel distance adjustment mechanism, and Fig. 3 is a front view of the lens barrel. 4 is a sectional view of the fitting part between the fixed lens barrel and the helicoid ring, and FIG.
It is a front view of the distance adjustment mechanism of the lens barrel which shows an Example. (Explanation of symbols of main parts), 11...Front group lens system, 12...Rear group lens system, 13...Lens holding tube, 14...Focus ring, 15...Fixed lens barrel, 15b, 15c, 15d...Protrusion, 15
e...bis, 16...watshiya.
Claims (1)
能なフオーカスリングと、該フオーカスリングに
嵌合し、該フオーカスリングの回動に連動してス
ラスト方向に合焦レンズ系を駆動するレンズ保持
筒とを有し、 前記固定鏡筒の第一結合部と前記フオーカスリ
ングの第二結合部とにより両者を結合すると共に
、前記フオーカスリングの第三結合部と前記レン
ズ保持筒の第四結合部とにより両者を結合するよ
うに構成されたレンズ鏡筒の距離調整機構におい
て、 前記第一結合部と前記第二結合部とにより第１
の結合手段を形成し、また前記第三結合部と前記
第四結合部とにより第２の結合手段を形成し、 前記固定鏡筒と前記フオーカスリングと前記レ
ンズ保持筒とをそれぞれ線膨張係数が同一である
モールド部材で成形し、前記第１の結合手段と前
記第２の結合手段とのいずれか一方は、回転可能
であつてスラスト方向に位置規制をする結合手段
であつて、他方はヘリコイドネジによつてスラス
ト方向に相対移動させる結合手段であり、 前記いずれか一方の結合手段の前記いずれか一
方の結合部は、周方向に周方向に沿つた第１の突
出部と、周方向にスラスト方向に沿つた第２の突
出部と、該第２の突出部に対向するように設けら
れた円環部材とから形成された凹部から構成され
、 前記いずれか他方の結合部は、前記凹部に嵌合
して摺動する凸部から構成されることを特徴とす
るレンズ鏡筒の距離調整機構。 (2) 前記第１の突出部は、切欠によつて周方向
に弾性変形が可能であることを特徴とする実用新
案登録請求の範囲第１項に記載の距離調整機構。[Claims for Utility Model Registration] (1) A fixed lens barrel, a focus ring that fits into the fixed lens barrel and is rotatable, and a focus ring that fits into the focus ring and rotates the focus ring. a lens holding barrel that drives the focusing lens system in the thrust direction in conjunction with the fixed lens barrel, and a first coupling part of the fixed lens barrel and a second coupling part of the focus ring couple the two; In a lens barrel distance adjustment mechanism configured to connect a third connecting portion of a focus ring and a fourth connecting portion of the lens holding tube, the first connecting portion and the second connecting portion The first
a coupling means is formed by the third coupling part and the fourth coupling part, and the fixed lens barrel, the focus ring, and the lens holding barrel each have a linear expansion coefficient. are molded from the same mold member, one of the first coupling means and the second coupling means is a coupling means that is rotatable and restricts the position in the thrust direction, and the other is The coupling means is configured to be relatively moved in the thrust direction by a helicoid screw, and the coupling portion of the one of the coupling means is connected to a first protrusion along the circumferential direction and a first protrusion along the circumferential direction. a concave portion formed from a second protruding portion along the thrust direction and an annular member provided to face the second protruding portion; A lens barrel distance adjustment mechanism comprising a convex portion that slides while fitting into a concave portion. (2) The distance adjustment mechanism according to claim 1, wherein the first protrusion is elastically deformable in the circumferential direction by a notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2370387U JPH0542410Y2 (en) | 1987-02-20 | 1987-02-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2370387U JPH0542410Y2 (en) | 1987-02-20 | 1987-02-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63132912U true JPS63132912U (en) | 1988-08-31 |
| JPH0542410Y2 JPH0542410Y2 (en) | 1993-10-26 |
Family
ID=30822250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2370387U Expired - Lifetime JPH0542410Y2 (en) | 1987-02-20 | 1987-02-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0542410Y2 (en) |
-
1987
- 1987-02-20 JP JP2370387U patent/JPH0542410Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0542410Y2 (en) | 1993-10-26 |
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