JPH02134510U - - Google Patents
Info
- Publication number
- JPH02134510U JPH02134510U JP4439589U JP4439589U JPH02134510U JP H02134510 U JPH02134510 U JP H02134510U JP 4439589 U JP4439589 U JP 4439589U JP 4439589 U JP4439589 U JP 4439589U JP H02134510 U JPH02134510 U JP H02134510U
- Authority
- JP
- Japan
- Prior art keywords
- outer cylinder
- optical
- cylinder
- elastic member
- axis direction
- 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 description 9
- 230000002093 peripheral effect Effects 0.000 claims 2
Description
第１図は本考案による光学機器の防塵構造の実
施例１を示す断面図、第２図ａ，ｂは実施例１の
使用状態を示す断面図、第３図は実施例２の断面
図、第４図は実施例３の断面図、第５図は従来の
レンズ鏡筒の防塵構造を示す断面図である。
１……レンズ群、２……レンズ保持筒、３……
マウント、４……レンズ鏡筒外筒、５……フオー
カスリング、６……フオーカスピン、７……カバ
ー、８……直進キー、９……カム溝、１０……板
材、２ａ……直進キー穴、５ａ……突起、７ａ…
…突起。
FIG. 1 is a sectional view showing Embodiment 1 of the dustproof structure for an optical device according to the present invention, FIGS. 2 a and b are sectional views showing the usage state of Embodiment 1, and FIG. FIG. 4 is a sectional view of Embodiment 3, and FIG. 5 is a sectional view showing the dustproof structure of a conventional lens barrel. 1... Lens group, 2... Lens holding tube, 3...
Mount, 4... Lens barrel outer barrel, 5... Focus ring, 6... Focus pin, 7... Cover, 8... Straight key, 9... Cam groove, 10... Plate material, 2a... Straight key Hole, 5a... Protrusion, 7a...
…protrusion.
Claims (1)
とを光軸方向に沿つて相対的に移動させることに
より、合焦或は変倍を行なう光学機器において、 該外筒に周方向に沿つて固定したゴム等からな
る筒状の軟弾性部材の内面側に、内周端部が該内
筒の外周面に当接するシール部を一体的に形成し
たことを特徴とする光学機器の防塵構造。 ２ 外筒と該外筒に隙間を有して内装される内筒
とを光軸方向に沿つて相対的に移動させることに
より、合焦或は変倍を行なう光学機器において、 該内筒の外周部にゴム等からなる筒状の軟弾性
部材を嵌合固定し、外周端部が該外筒の内周面に
当接するシール部を該軟弾性部材に一体的に形成
したことを特徴とする光学機器の防塵構造。 ３ 前記シール部は光軸方向に沿つて複数形成し
たことを特徴とする請求項１又は２に記載の光学
機器の防塵構造。[Claims for Utility Model Registration] 1. Focusing or changing magnification is performed by relatively moving an outer cylinder and an inner cylinder installed inside the outer cylinder with a gap along the optical axis direction. In an optical device, a seal portion whose inner peripheral end abuts the outer peripheral surface of the inner cylinder is integrally formed on the inner surface of a cylindrical soft elastic member made of rubber or the like fixed along the circumferential direction of the outer cylinder. A dust-proof structure for optical equipment characterized by the following: 2. In an optical device that performs focusing or variable magnification by relatively moving an outer cylinder and an inner cylinder installed inside the outer cylinder with a gap along the optical axis direction, A cylindrical soft elastic member made of rubber or the like is fitted and fixed to the outer periphery, and a seal portion whose outer periphery end abuts the inner circumferential surface of the outer cylinder is integrally formed with the soft elastic member. Dust-proof structure for optical equipment. 3. The dustproof structure for an optical device according to claim 1 or 2, wherein a plurality of the seal portions are formed along the optical axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4439589U JPH02134510U (en) | 1989-04-15 | 1989-04-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4439589U JPH02134510U (en) | 1989-04-15 | 1989-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02134510U true JPH02134510U (en) | 1990-11-08 |
Family
ID=31557657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4439589U Pending JPH02134510U (en) | 1989-04-15 | 1989-04-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02134510U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015075705A (en) * | 2013-10-10 | 2015-04-20 | キヤノン株式会社 | Lens barrel and image capturing device |
-
1989
- 1989-04-15 JP JP4439589U patent/JPH02134510U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015075705A (en) * | 2013-10-10 | 2015-04-20 | キヤノン株式会社 | Lens barrel and image capturing device |
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