JPS6370521U - - Google Patents
Info
- Publication number
- JPS6370521U JPS6370521U JP16439386U JP16439386U JPS6370521U JP S6370521 U JPS6370521 U JP S6370521U JP 16439386 U JP16439386 U JP 16439386U JP 16439386 U JP16439386 U JP 16439386U JP S6370521 U JPS6370521 U JP S6370521U
- Authority
- JP
- Japan
- Prior art keywords
- focusing
- optical system
- focusing ring
- ring
- photographing
- 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
- 230000003287 optical effect Effects 0.000 claims 3
- 238000001514 detection method Methods 0.000 claims 1
Landscapes
- Lens Barrels (AREA)
Description
第１図は本考案のフオーカシング機構を有する
撮影レンズの一実施例の要部を示す縦断面図、第
２図は同実施例の直進ガイド溝、リード溝、カム
溝及びガイドピンの関係を展開して示す平面図、
第３Ａ図は同実施例のコード板とブラシとの関係
を直線的に延ばして示す正面図、第３Ｂ図は同実
施例のコード板及びブラシの展開平面図である。
４…第１移動枠、４ｂ…ガイドピン、５…第２
移動枠、５ａ…直進ガイド溝、７…回転環、７ａ
…リード溝、７ｂ…ガイドピン、８…鏡筒本体、
８ｂ…リード溝、８ｃ…直進ガイド溝、９…フオ
ーカシング環、９…カム溝、１１…コード板、１
２…ブラシ。
Fig. 1 is a vertical sectional view showing the main parts of an embodiment of a photographic lens having a focusing mechanism of the present invention, and Fig. 2 shows the relationship among the linear guide groove, lead groove, cam groove, and guide pin of the same embodiment. A plan view shown as
FIG. 3A is a front view showing the relationship between the code plate and brush of the same embodiment in a straight line, and FIG. 3B is a developed plan view of the code plate and brush of the same embodiment. 4...First moving frame, 4b...Guide pin, 5...Second
Moving frame, 5a... Straight guide groove, 7... Rotating ring, 7a
...lead groove, 7b...guide pin, 8...lens barrel body,
8b... Lead groove, 8c... Straight guide groove, 9... Focusing ring, 9... Cam groove, 11... Code plate, 1
2...Brush.
Claims (1)
カシング環の回動を光学系の直線運動に変換して
フオーカシングを行なう撮影レンズにおいて、上
記フオーカシング環に、その回動に伴ない光学系
を直進移動させるカム窓を形成し、かつこのカム
溝を、フオーカシング環の単位回転角に対する光
学系の移動量が、近距離側撮影域より遠距離撮影
域側で小さくなるように形成し、かつ上記フオー
カシング環と固定されたレンズ鏡筒本体との間に
、フオーカシング環の回転角に応じて撮影距離を
検出する撮影距離検出機構を設けたことを特徴と
する撮影レンズのフオーカシング機構。 In a photographing lens that performs focusing by converting the rotation of a focusing ring rotatably fitted into the lens barrel body into linear movement of the optical system, the focusing ring causes the optical system to move in a straight line as it rotates. A cam window to be moved is formed, and the cam groove is formed so that the amount of movement of the optical system per unit rotation angle of the focusing ring is smaller in the long-distance shooting area than in the near-distance shooting area, and A focusing mechanism for a photographic lens, characterized in that a photographing distance detection mechanism is provided between the ring and a fixed lens barrel body to detect a photographing distance according to the rotation angle of the focusing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16439386U JPS6370521U (en) | 1986-10-27 | 1986-10-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16439386U JPS6370521U (en) | 1986-10-27 | 1986-10-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6370521U true JPS6370521U (en) | 1988-05-12 |
Family
ID=31093472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16439386U Pending JPS6370521U (en) | 1986-10-27 | 1986-10-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6370521U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH025713U (en) * | 1988-06-24 | 1990-01-16 | ||
| JPH025712U (en) * | 1988-06-27 | 1990-01-16 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5225625A (en) * | 1975-08-20 | 1977-02-25 | Canon Inc | Focusing means for the telephoto lens |
| JPS54139528A (en) * | 1978-04-20 | 1979-10-30 | Asahi Optical Co Ltd | Lens barrel adapted for flashing photograph |
| JPS5773706A (en) * | 1980-10-27 | 1982-05-08 | Canon Inc | Interchangeable lens equipped with automatic focusing device |
| JPS59109005A (en) * | 1982-12-14 | 1984-06-23 | West Electric Co Ltd | Lens moving device |
-
1986
- 1986-10-27 JP JP16439386U patent/JPS6370521U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5225625A (en) * | 1975-08-20 | 1977-02-25 | Canon Inc | Focusing means for the telephoto lens |
| JPS54139528A (en) * | 1978-04-20 | 1979-10-30 | Asahi Optical Co Ltd | Lens barrel adapted for flashing photograph |
| JPS5773706A (en) * | 1980-10-27 | 1982-05-08 | Canon Inc | Interchangeable lens equipped with automatic focusing device |
| JPS59109005A (en) * | 1982-12-14 | 1984-06-23 | West Electric Co Ltd | Lens moving device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH025713U (en) * | 1988-06-24 | 1990-01-16 | ||
| JPH025712U (en) * | 1988-06-27 | 1990-01-16 |
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