JPS6384106U - - Google Patents
Info
- Publication number
- JPS6384106U JPS6384106U JP17761886U JP17761886U JPS6384106U JP S6384106 U JPS6384106 U JP S6384106U JP 17761886 U JP17761886 U JP 17761886U JP 17761886 U JP17761886 U JP 17761886U JP S6384106 U JPS6384106 U JP S6384106U
- Authority
- JP
- Japan
- Prior art keywords
- lens barrel
- fixed lens
- cam frame
- fixed
- rotating cam
- 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.)
- Pending
Links
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims 3
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Description
第1図は、本考案の第1実施例の構成を示すズ
ームレンズ鏡筒の長焦点状態と短焦点状態を上半
部と下半部に分けて示す断面図、第2図は、第1
図中に示される固定鏡筒と回転カム枠の関係を示
す展開図、第3図は、短焦点位置と長焦点位置の
ピントズレ量を示す線図、第4図は、第1図中に
示されるシフト調整のための機構の要部を分解し
て示す斜視図、第5図は、第1図の―線矢視
方向断面を簡略化して示す断面図、第6図は、本
考案の第2実施例を示すズームレンズ鏡筒のシフ
ト調整構造の要部を示す斜視図、第7図Aは、本
考案の第3実施例を示すズームレンズ鏡筒のシフ
ト調整構造の要部を示す断面図、第7図Bは、第
7図A中に示される第1の固定部材の斜視図、第
8図および第9図は、従来のズームレンズ鏡筒の
一例の要部を示す展開図および拡大断面図、第1
0図は、他の従来の例を示す断面図である。
20……レンズマウント部、21……固定鏡筒
、21a,21b,21c……直線カム溝、22
……回転カム枠、22a,22b,22c……カ
ム溝、22d……位置規制部、23……回転ヘリ
コイド、24……第2群レンズ枠、25,26…
…第2群レンズ、28……第3群レンズ枠、30
……第1群レンズ枠、33……距離調整リング、
34……ズームリング、36……絞り指標リング
、37……カム固定部材、38……スペーサー、
40,41,42……ピン、50……第1の固定
部材、50a……調整用長孔、51……第2の固
定部材、52……固定ネジ、60……位置規制部
、80……位置規制部、81……第1の固定部材
、82……第2の固定部材、82a……長孔、8
3……固定ネジ。
FIG. 1 is a cross-sectional view showing the configuration of the first embodiment of the present invention, showing the long focus state and short focus state of the zoom lens barrel divided into an upper half and a lower half, and FIG.
FIG. 3 is a developed view showing the relationship between the fixed lens barrel and the rotating cam frame shown in the figure, FIG. FIG. 5 is an exploded perspective view showing the main parts of the shift adjustment mechanism according to the present invention; FIG. 5 is a simplified cross-sectional view of FIG. FIG. 7A is a perspective view showing the main parts of the shift adjustment structure for a zoom lens barrel according to the second embodiment, and FIG. 7A is a cross-sectional view showing the main parts of the shift adjustment structure for the zoom lens barrel according to the third embodiment of the present invention. 7B is a perspective view of the first fixing member shown in FIG. 7A, and FIGS. 8 and 9 are exploded views showing essential parts of an example of a conventional zoom lens barrel. Enlarged sectional view, 1st
FIG. 0 is a sectional view showing another conventional example. 20...Lens mount part, 21...Fixed lens barrel, 21a, 21b, 21c...Linear cam groove, 22
... Rotating cam frame, 22a, 22b, 22c... Cam groove, 22d... Position regulating portion, 23... Rotating helicoid, 24... Second group lens frame, 25, 26...
...Second group lens, 28...Third group lens frame, 30
...First group lens frame, 33...Distance adjustment ring,
34...Zoom ring, 36...Aperture index ring, 37...Cam fixing member, 38...Spacer,
40, 41, 42...Pin, 50...First fixing member, 50a...Elongated hole for adjustment, 51...Second fixing member, 52...Fixing screw, 60...Position regulating part, 80... ...Position regulating portion, 81...First fixing member, 82...Second fixing member, 82a...Long hole, 8
3...Fixing screw.
Claims (1)
る複数の移動枠を内径部に嵌合する固定鏡筒と、
この固定鏡筒に回動自在に嵌合する回転カム枠と
を備え、前記回転カム枠を回動させることにより
前記複数の移動枠を前記固定鏡筒に対して光軸方
向に選択的に移動させるようにしてなるズームレ
ンズ鏡筒において、一端部近傍の外周に周回溝ま
たは周回段部からなる位置規制部が形成された前
記回転カム枠と、一端側が前記回転カム枠を回動
のみ許容するように前記位置規制部に係合され他
端側が前記固定鏡筒に固定されるカム固定部材と
、このカム固定部材の前記一端側と前記固定鏡筒
との間に介挿される調整部材とを具備し、前記調
整部材によつて前記固定鏡筒に対する前記回転カ
ム枠の光軸方向位置を微調整し得るように構成し
たことを特徴とするズームレンズ鏡筒。 a fixed lens barrel into which a plurality of movable frames that support lenses forming a zoom lens optical system are fitted;
a rotating cam frame that rotatably fits into the fixed lens barrel, and by rotating the rotating cam frame, the plurality of movable frames are selectively moved in the optical axis direction with respect to the fixed lens barrel. In the zoom lens barrel, the rotating cam frame has a position regulating portion formed of a circumferential groove or a circumferential stepped portion formed on the outer periphery near one end, and the one end side only allows rotation of the rotating cam frame. a cam fixing member that is engaged with the position regulating portion and whose other end is fixed to the fixed lens barrel; and an adjusting member that is inserted between the one end of the cam fixing member and the fixed lens barrel. A zoom lens barrel, characterized in that the adjusting member is configured to finely adjust the position of the rotary cam frame in the optical axis direction with respect to the fixed lens barrel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17761886U JPS6384106U (en) | 1986-11-20 | 1986-11-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17761886U JPS6384106U (en) | 1986-11-20 | 1986-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6384106U true JPS6384106U (en) | 1988-06-02 |
Family
ID=31118986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17761886U Pending JPS6384106U (en) | 1986-11-20 | 1986-11-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6384106U (en) |
-
1986
- 1986-11-20 JP JP17761886U patent/JPS6384106U/ja active Pending
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