JPH0311211U - - Google Patents
Info
- Publication number
- JPH0311211U JPH0311211U JP1989127088U JP12708889U JPH0311211U JP H0311211 U JPH0311211 U JP H0311211U JP 1989127088 U JP1989127088 U JP 1989127088U JP 12708889 U JP12708889 U JP 12708889U JP H0311211 U JPH0311211 U JP H0311211U
- Authority
- JP
- Japan
- Prior art keywords
- photographic lens
- camera
- light beam
- helicoid screw
- female helicoid
- 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 4
- 230000004907 flux Effects 0.000 claims 1
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
Landscapes
- Lens Barrels (AREA)
Description
第１図は、本考案の第一実施例であるヘリコイ
ドネジの部分拡大図を示しており、第２図ａ及び
ｂはそれぞれ第二実施例であるヘリコイドネジの
部分拡大図を示している。第３図は、従来例にお
けるヘリコイドネジを有する撮影レンズ鏡筒の断
面図を示しており、第４図は、従来例におけるヘ
リコイドネジの部分拡大図を示している。第５図
は第三実施例であるヘリコイドネジの部分拡大図
を示している。第６図ａ及び第７図ａはそれぞれ
第三実施例の変形例であるヘリコイドネジの部分
拡大図を示し、第６図ｂ及び第７図ｂはそれぞれ
第６図ａ及び第７図ａをさらに部分的に拡大した
図を示している。第８図ａ及びｂはそれぞれ第三
実施例の変形例であるヘリコイドネジの部分拡大
図を示している。
主要部分の符号の説明、３……回動部材、７…
…撮影レンズ、８……レンズ保持筒、８ａ，９ａ
……ヘリコイドネジ、９ｃ……山の頂、９ｄ……
突起部、９ｅ……谷底、９ｆ……斜面、１１……
キー、１２……アパーチヤ、１３……フイルム面
、３９ｄ……凹部。
FIG. 1 shows a partially enlarged view of a helicoid screw according to a first embodiment of the present invention, and FIGS. 2a and 2b respectively show partially enlarged views of a helicoid screw according to a second embodiment. FIG. 3 shows a sectional view of a photographing lens barrel having a helicoid screw in the conventional example, and FIG. 4 shows a partially enlarged view of the helicoid screw in the conventional example. FIG. 5 shows a partially enlarged view of a helicoid screw according to a third embodiment. 6a and 7a respectively show partially enlarged views of a helicoid screw which is a modification of the third embodiment, and FIGS. 6b and 7b respectively show FIGS. 6a and 7a. A further partially enlarged view is shown. FIGS. 8a and 8b each show a partially enlarged view of a helicoid screw which is a modification of the third embodiment. Explanation of symbols of main parts, 3... Rotating member, 7...
...Photographing lens, 8...Lens holding tube, 8a, 9a
...Helicoid screw, 9c...Top of mountain, 9d...
Projection, 9e... Valley bottom, 9f... Slope, 11...
Key, 12...Aperture, 13...Film surface, 39d...Recess.
Claims (1)
撮影レンズに入射する撮影光束に対して露出した
雌ヘリコイドネジを有する、カメラの撮影レンズ
鏡筒であつて、 前記雌ヘリコイドネジの平坦な山の頂に突起部
を形成し、 該突起部は、前記山の頂で反射してフイルム面
方向へ導かれる撮影光束を遮り、該撮影光束が前
記フイルム面上に入射することを抑制することを
特徴とする、カメラの撮影レンズ鏡筒。 (2) 撮影レンズの光軸を軸心に螺設され、前記
撮影レンズに入射する撮影光束に対して露出した
雌ヘリコイドネジを有する、カメラの撮影レンズ
鏡筒であつて、 前記雌ヘリコイドネジの谷底は、前記撮影レン
ズの光軸に対して傾斜されており、該傾斜により
、前記谷底で反射する撮影光束が少なくともフイ
ルム面上に入射することを抑制することを特徴と
する、カメラの撮影レンズ鏡筒。 (3) 撮影レンズの光軸を軸心に螺設され、前記
撮影レンズに入射する撮影光束に対して露出した
雌ヘリコイドネジを有する、カメラの撮影レンズ
鏡筒であつて、 前記雌ヘリコイドネジの平坦な山の頂に該平坦
部が残らないように少なくとも１つの凹部を形成
し、 該凹部は、該凹部自身で反射する撮影光束が少
なくとも前記フイルム面上に入射することを抑制
するような形状を成していることを特徴とする、
カメラの撮影レンズ鏡筒。[Scope of Claim for Utility Model Registration] (1) A photographic lens barrel for a camera, which has a female helicoid screw threaded around the optical axis of the photographic lens and exposed to the photographic light beam incident on the photographic lens. A protrusion is formed on the top of the flat ridge of the female helicoid screw, and the protrusion blocks the photographing light beam reflected from the top of the mountain and guided in the direction of the film surface, so that the photographing light beam is directed toward the film surface. A photographic lens barrel for a camera, which is characterized by suppressing light incident on a surface. (2) A photographing lens barrel for a camera, which has a female helicoid screw threaded around the optical axis of the photographic lens and exposed to the photographing light beam incident on the photographic lens, wherein the female helicoid screw A photographic lens for a camera, wherein the valley bottom is inclined with respect to the optical axis of the photographic lens, and the slope suppresses at least a photographing light beam reflected at the valley bottom from being incident on the film surface. lens barrel. (3) A photographic lens barrel for a camera, which has a female helicoid screw threaded around the optical axis of the photographic lens and exposed to the photographing light beam incident on the photographic lens, wherein the female helicoid screw At least one recess is formed so that the flat part does not remain on the top of the flat mountain, and the recess has a shape that suppresses at least the photographing light flux reflected by the recess from being incident on the film surface. It is characterized by having the following characteristics:
Camera lens barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989127088U JPH0311211U (en) | 1988-11-10 | 1989-10-30 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14688088 | 1988-11-10 | ||
| JP1989127088U JPH0311211U (en) | 1988-11-10 | 1989-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0311211U true JPH0311211U (en) | 1991-02-04 |
Family
ID=31718928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989127088U Pending JPH0311211U (en) | 1988-11-10 | 1989-10-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0311211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102666204A (en) * | 2009-10-05 | 2012-09-12 | 本田技研工业株式会社 | Vehicle interior material |
-
1989
- 1989-10-30 JP JP1989127088U patent/JPH0311211U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102666204A (en) * | 2009-10-05 | 2012-09-12 | 本田技研工业株式会社 | Vehicle interior material |
| US8440287B2 (en) | 2009-10-05 | 2013-05-14 | Honda Motor Co., Ltd | Vehicle interior material |
| JP5386592B2 (en) * | 2009-10-05 | 2014-01-15 | 本田技研工業株式会社 | Interior materials for vehicles |
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