JPH0394506U - - Google Patents
Info
- Publication number
- JPH0394506U JPH0394506U JP238990U JP238990U JPH0394506U JP H0394506 U JPH0394506 U JP H0394506U JP 238990 U JP238990 U JP 238990U JP 238990 U JP238990 U JP 238990U JP H0394506 U JPH0394506 U JP H0394506U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- mounting
- flange
- threaded portion
- screw portion
- 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
- 230000002093 peripheral effect Effects 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 claims 1
- 239000000057 synthetic resin Substances 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 description 1
Description
第１図は本考案による実施例の断面図、第２図
はヘリコイド部２ｂの山の拡大断面図である。
主要部分の符号の説明、Ｌ１……一群レンズ系
、１……一群レンズ保持筒、１ａ……取付ねじ部
、１ｂ……つば部、２……ヘリコイド筒、２ｂ…
…ヘリコイド、２ｃ……第２の取付ねじ部、２ａ
……第１の取付ねじ部、３……補強リング筒、３
ａ……取付ねじ部、３ｂ……つば部、４……一群
移動筒。
FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the peaks of the helicoid portion 2b. Explanation of symbols of main parts, L1...1st group lens system, 1...1st group lens holding tube, 1a...mounting screw part, 1b...flange part, 2...helicoid tube, 2b...
...Helicoid, 2c...Second mounting screw part, 2a
...First mounting screw part, 3...Reinforcement ring cylinder, 3
a...Mounting screw part, 3b...Brim part, 4...1 group moving cylinder.
Claims (1)
内周部に有し、前記第１の取付ねじ部と回転方向
が反対の第２の取付ねじ部を外周部に有しており
、円筒軸に直角な端面を有する第１の円筒と、 前記第１の円筒の第２の取付ねじ部と螺合する
取付ねじ部を内周部に有し、かつ半径方向内方に
延在し前記第１の円筒の端面と当接するつば部を
有し、該内周部が前記第１の円筒の外周部に嵌合
する第２の円筒と、 前記第１の円筒の第１の取付ねじ部と螺合する
取付ねじ部を外周部に有し、かつ半径方向外方に
延在し前記第２の円筒のつば部と当接するつば部
を有する第３の円筒とから成り、 前記第１の円筒の第２の取付ねじ部と前記第２
の円筒の取付ねじ部との螺合及び前記第１の円筒
の第１の取付ねじ部と前記第３の円筒の取付ねじ
部との螺合により、前記第２の円筒のつば部を前
記第１の円筒の端面と前記第３の円筒のつば部と
の間に挟み込んで前記第２の円筒を前記第１の円
筒に嵌合して固定することを特徴とするレンズ鏡
筒における固定装置。 ２ 前記第１の円筒は弾性係数の小さい合成樹脂
からなり、前記第２の円筒は弾性係数の大きい金
属からなり、前記第３の円筒は内部にレンズ系を
保持するレンズ保持筒であることを特徴とする請
求項１記載の装置。[Claims for Utility Model Registration] 1. A helicoid having a helicoid and a first mounting threaded portion on the inner periphery, and a second mounting threaded portion having a rotation direction opposite to the first mounting threaded portion on the outer periphery. a first cylinder having an end face perpendicular to the cylindrical axis; and a mounting threaded portion on the inner circumference that is threadedly engaged with the second mounting threaded portion of the first cylinder; a second cylinder having a flange extending in the direction and coming into contact with an end surface of the first cylinder, the inner peripheral part of which fits into the outer peripheral part of the first cylinder; a third cylinder having a mounting screw portion on its outer periphery that is threadedly engaged with the first mounting screw portion, and a flange portion extending radially outward and abutting the flange portion of the second cylinder; a second mounting screw portion of the first cylinder and a second mounting screw portion of the first cylinder;
The flange of the second cylinder is connected to the second cylinder by screwing with the mounting thread of the cylinder and the first mounting thread of the first cylinder and the third cylinder. A fixing device for a lens barrel, characterized in that the second cylinder is inserted between an end face of the first cylinder and a flange of the third cylinder to fit and fix the second cylinder to the first cylinder. 2. The first cylinder is made of a synthetic resin with a small elastic coefficient, the second cylinder is made of a metal with a large elastic coefficient, and the third cylinder is a lens holding cylinder that holds a lens system inside. 2. The device of claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP238990U JPH0394506U (en) | 1990-01-17 | 1990-01-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP238990U JPH0394506U (en) | 1990-01-17 | 1990-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0394506U true JPH0394506U (en) | 1991-09-26 |
Family
ID=31506266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP238990U Pending JPH0394506U (en) | 1990-01-17 | 1990-01-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0394506U (en) |
-
1990
- 1990-01-17 JP JP238990U patent/JPH0394506U/ja active Pending
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