JPH049008U - - Google Patents
Info
- Publication number
- JPH049008U JPH049008U JP4736190U JP4736190U JPH049008U JP H049008 U JPH049008 U JP H049008U JP 4736190 U JP4736190 U JP 4736190U JP 4736190 U JP4736190 U JP 4736190U JP H049008 U JPH049008 U JP H049008U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- elongated hole
- recess
- outer tube
- moving device
- 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 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Description
第１図は、本考案の実施例の要部展開斜視図で
、第２図は、本考案の実施例の要部組立断面図で
ある。第３図は、本考案の自動調心機能の原理図
で、ａは球状体が位置ずれしたとき、ｂは通常状
態である。第４図は、従来例におけるレンズホル
ダの被ガイド突起と案内溝との関係を示す図で、
ａは調整リング回転により被ガイド突起に加わる
力の成分を示し、ｂは回転方向への傾き、ｃは光
軸方向からの傾きを示す。
２……レンズ、４……レンズホルダ、５……内
筒、６……外筒、７Ａ，７Ｂ……直線状長穴、８
Ａ，８Ｂ……螺旋状長溝、９Ａ，９Ｂ……凹部、
１０Ａ，１０Ｂ……鋼球（球状体）。
FIG. 1 is an exploded perspective view of the main parts of an embodiment of the present invention, and FIG. 2 is an assembled sectional view of the main parts of the embodiment of the present invention. FIG. 3 is a diagram showing the principle of the self-centering function of the present invention, where a shows the state when the spherical body is displaced and b shows the normal state. FIG. 4 is a diagram showing the relationship between the guided protrusion and the guide groove of the lens holder in a conventional example.
a indicates the component of the force applied to the guided protrusion due to the rotation of the adjustment ring, b indicates the inclination in the direction of rotation, and c indicates the inclination from the optical axis direction. 2... Lens, 4... Lens holder, 5... Inner tube, 6 ... Outer tube, 7A, 7B... Straight elongated hole, 8
A, 8B...Spiral long groove, 9A, 9B...Concavity,
10A, 10B... Steel balls (spherical bodies).
Claims (1)
、 レンズを保持するレンズホルダとを有し、 前記内筒に設けた長穴と前記外筒の内壁に設け
た長溝との一方をレンズ光軸方向の直線状、他方
を螺旋状とし、 前記レンズホルダの前記内筒に接する面に凹部
を設け、 該設けられた凹部と前記長穴と前記長溝との間
に球状体を介したことを特徴とするレンズ移動装
置。 ２ 請求項１のレンズ移動装置を視度調整装置に
適用したことを特徴とするビユーフアインダ。[Claims for Utility Model Registration] 1. A lens barrel having a rotatable inner tube or outer tube, and a lens holder for holding the lens, and an elongated hole provided in the inner tube and an inner wall of the outer tube. one of the long grooves provided in the lens is linear in the optical axis direction of the lens, and the other is spiral, and a recess is provided on the surface of the lens holder in contact with the inner cylinder, and the provided recess, the elongated hole, and the long groove A lens moving device characterized in that a spherical body is interposed between the lenses. 2. A viewfinder characterized in that the lens moving device according to claim 1 is applied to a diopter adjustment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4736190U JPH049008U (en) | 1990-05-08 | 1990-05-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4736190U JPH049008U (en) | 1990-05-08 | 1990-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH049008U true JPH049008U (en) | 1992-01-27 |
Family
ID=31563222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4736190U Pending JPH049008U (en) | 1990-05-08 | 1990-05-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH049008U (en) |
-
1990
- 1990-05-08 JP JP4736190U patent/JPH049008U/ja active Pending
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