JPH03130016U - - Google Patents
Info
- Publication number
- JPH03130016U JPH03130016U JP3748990U JP3748990U JPH03130016U JP H03130016 U JPH03130016 U JP H03130016U JP 3748990 U JP3748990 U JP 3748990U JP 3748990 U JP3748990 U JP 3748990U JP H03130016 U JPH03130016 U JP H03130016U
- Authority
- JP
- Japan
- Prior art keywords
- holding member
- screen
- groove
- recess
- cover
- 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
Landscapes
- Optical Head (AREA)
Description
第１図乃至第３図は本考案の実施例を示し、第
１図は第一の実施例の一部断面斜視図、第２図ａ
，ｂは同正断面図及び平面図、第３図は第二の実
施例の正断面図である。第４図は従来の装置の正
断面図である。
１２，１２′…対物レンズ保持部材、１２ａ，
１２′ａ…衝立状凸部、１２ｂ，１２′ｂ…溝状
凹部、１３，１３′…対物レンズ、１４，１４′
…カバー、１４ａ，１４′ａ…開口、１４ｂ，１
４′ｂ，１４′ｃ…衝立状凸部、１４′ｄ…溝状
凹部。
1 to 3 show embodiments of the present invention, FIG. 1 is a partially sectional perspective view of the first embodiment, and FIG.
, b are a front sectional view and a plan view, and FIG. 3 is a front sectional view of the second embodiment. FIG. 4 is a front sectional view of a conventional device. 12, 12'...Objective lens holding member, 12a,
12'a... Screen-like convex part, 12b, 12'b... Groove-like concave part, 13, 13'... Objective lens, 14, 14'
...Cover, 14a, 14'a...Opening, 14b, 1
4'b, 14'c... Screen-like protrusions, 14'd... Groove-like recesses.
Claims (1)
カバーとを有する光ヘツドの防塵機構であつて、
上記保持部材における対物レンズの周囲に衝立状
凸部又は溝状凹部を設けると共に、上記カバーの
内面における光路用開口の周囲に上記保持部材の
衝立状凸部又は溝状凹部に対応する溝状凹部又は
衝立状凸部を設け、保持部材及びカバーの互いの
上記凸部又は凹部を非接触状態で嵌合させたこと
を特徴とする光ヘツドの防塵機構。 A dustproof mechanism for an optical head, comprising a holding member holding an objective lens and a cover covering the holding member,
A screen-like protrusion or groove-like recess is provided around the objective lens in the holding member, and a groove-like recess corresponding to the screen-like protrusion or groove-like recess of the holding member is provided around the optical path opening on the inner surface of the cover. Alternatively, a dustproof mechanism for an optical head, characterized in that a screen-like projection is provided, and the projections or recesses of the holding member and the cover are fitted into each other in a non-contact state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3748990U JPH03130016U (en) | 1990-04-06 | 1990-04-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3748990U JPH03130016U (en) | 1990-04-06 | 1990-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03130016U true JPH03130016U (en) | 1991-12-26 |
Family
ID=31544648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3748990U Pending JPH03130016U (en) | 1990-04-06 | 1990-04-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03130016U (en) |
-
1990
- 1990-04-06 JP JP3748990U patent/JPH03130016U/ja active Pending