JPH01146206U - - Google Patents
Info
- Publication number
- JPH01146206U JPH01146206U JP4253688U JP4253688U JPH01146206U JP H01146206 U JPH01146206 U JP H01146206U JP 4253688 U JP4253688 U JP 4253688U JP 4253688 U JP4253688 U JP 4253688U JP H01146206 U JPH01146206 U JP H01146206U
- Authority
- JP
- Japan
- Prior art keywords
- thread
- inclination angle
- protrusion
- lens barrel
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 2
Landscapes
- Lens Barrels (AREA)
- Gears, Cams (AREA)
Description
第１図は本考案のレンズ鏡筒の１実施例の断面
図、第２図は第１図に示すヘリコイドねじを構成
する１対の雌ねじ及び雄ねじの拡大断面図、第３
図は本考案の他の実施例のヘリコイドねじの断面
図である。
１……移動鏡筒、２……固定鏡筒、４……ヘリ
コイドねじ、５……光軸、６……雌ねじ、７……
雄ねじ、８，８′……雌ねじ山、９，９′……雄
ねじ山、１０，１０′，１１，１１′，１３……
斜面、１４……雌ねじ突起部、１５……雄ねじ窪
み、１６，１７……側面、２２……雌ねじ窪み、
２３……雄ねじ突起部、２４，２５……側面、θ
……斜面の傾斜角、θ′……側面の傾斜角。
Fig. 1 is a sectional view of one embodiment of the lens barrel of the present invention, Fig. 2 is an enlarged sectional view of a pair of female and male threads constituting the helicoid thread shown in Fig. 1, and Fig.
The figure is a sectional view of a helicoid screw according to another embodiment of the present invention. 1...Movable lens barrel, 2...Fixed lens barrel, 4...Helicoid screw, 5...Optical axis, 6...Female thread, 7...
Male thread, 8, 8'... Female thread, 9, 9'... Male thread, 10, 10', 11, 11', 13...
Slope, 14... Female thread protrusion, 15... Male thread recess, 16, 17... Side surface, 22... Female thread recess,
23...Male thread protrusion, 24, 25...Side surface, θ
...Inclination angle of slope, θ'...Inclination angle of side surface.
Claims (1)
させるレンズ鏡筒において、 上記ヘリコイドねじの少なくとも一方がねじ山
の頂部にねじ山の斜面の傾斜角よりも大きな傾斜
角の側面を有する突起部を有し、一方上記ねじ山
の頂部と組合うねじ山の谷部に該斜面の傾斜角よ
り大きな傾斜角の側面を有する窪みを有すること
を特徴とするレンズ鏡筒。 (2) 上記突起部と窪みとの間に隙間をもつて隔
てられている請求項１記載のレンズ鏡筒。[Claims for Utility Model Registration] (1) In a lens barrel that is moved along the optical axis via a helicoid screw, at least one of the helicoid screws has an inclination angle larger than the slope of the thread at the top of the screw. A lens mirror having a protrusion having a side surface with an inclined angle, and a recess having a side surface with a larger inclination angle than the inclination angle of the inclined surface in the trough of the thread that combines with the top of the thread. Tube. (2) The lens barrel according to claim 1, wherein the protrusion and the depression are separated by a gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4253688U JPH0548167Y2 (en) | 1988-03-30 | 1988-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4253688U JPH0548167Y2 (en) | 1988-03-30 | 1988-03-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01146206U true JPH01146206U (en) | 1989-10-09 |
| JPH0548167Y2 JPH0548167Y2 (en) | 1993-12-21 |
Family
ID=31268948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4253688U Expired - Lifetime JPH0548167Y2 (en) | 1988-03-30 | 1988-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0548167Y2 (en) |
-
1988
- 1988-03-30 JP JP4253688U patent/JPH0548167Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0548167Y2 (en) | 1993-12-21 |