JPS60112226U

JPS60112226U - Squeezing device

Info

Publication number: JPS60112226U
Application number: JP20346983U
Authority: JP
Inventors: 貝瀬　等
Original assignee: 日本精密工業株式会社
Priority date: 1983-12-29
Filing date: 1983-12-29
Publication date: 1985-07-30

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の絞り装置の要部斜視図、第２図は本考案
に係わる絞り装置の分解斜視図、第３図は第２図に於け
る駆動部の分解斜視図、第４図は絞り装置を駆動制御す
る制御回路図である。図中、０−０′・・・光軸、１２ａ・・・環状コイル、
１２ｂ及び１２ｃ・・・回転軸、Ａ、・・・可動部、４
・・・絞り作動部材、２・・・絞り羽根、２ａ・・・絞
り開口、１９・・・第１付勢手段、２０・・・第２付勢
手段。Figure 1 is a perspective view of the main parts of a conventional throttle device, Figure 2 is an exploded perspective view of the throttle device according to the present invention, Figure 3 is an exploded perspective view of the drive section in Figure 2, and Figure 4 is an exploded perspective view of the drive unit in Figure 2. FIG. 3 is a control circuit diagram for driving and controlling the aperture device. In the figure, 0-0'... optical axis, 12a... circular coil,
12b and 12c...rotating shaft, A...movable part, 4
... Aperture operating member, 2... Aperture blade, 2a... Aperture aperture, 19... First biasing means, 20... Second biasing means.

Claims

[Scope of utility model registration request]

(1) A movable part that forms a ring-shaped coil around the optical axis and has a rotation axis in a direction substantially perpendicular to the optical axis and rotates, and a diaphragm aperture that is driven by this movable part and forms an aperture on the tip axis. In an aperture device comprising an aperture actuating member for actuating forming aperture blades, a first biasing means for imparting a habit of operating the aperture blades in a closing direction to one of the movable part lid or the aperture actuating member; A diaphragm blade characterized in that a second biasing means is provided on the other side of the diaphragm blade to cause the diaphragm blade to operate in the opening direction.

(2) The aperture device according to claim (1), wherein the urging force of the first urging means is greater than the urging force of the second urging means.