JPS6326830U

JPS6326830U -

Info

Publication number: JPS6326830U
Application number: JP11749286U
Authority: JP
Priority date: 1986-08-01
Filing date: 1986-08-01
Publication date: 1988-02-22
Anticipated expiration: 2001-08-01
Also published as: JPH059709Y2

Description

[Brief explanation of the drawing]

第１図は本考案にかかるフオーカルプレンシヤ
ツタの第一羽根アツセンブリと第二羽根アツセン
ブリの展開状態と折りたたみ状態を示す平面図、
第２図は第１図に対応する本考案に係るフオーカ
ルプレンシヤツタの一部破断平面図、第３図は第
一及び第二のアクチユエータにおける回転子の変
位角とトルクの関係を示す特性線図、第４図は第
一及び第二の羽根群の走行特性を示す特性線図で
ある。１……シヤツタプレート、１ａ……アパーチヤ
、２……第一羽根駆動アーム、３……第一羽根支
持アーム、４……第二羽根駆動アーム、５……第
二羽根支持アーム、６，７……第一の羽根群、８
，９……第二の羽根群、１０，１１……位置検出
センサ、１２……カバープレート、１２ａ……ア
パーチヤ、１３……第一のアクチユエータ、１４
……第一作動レバー、１５……第二のアクチユエ
ータ、１６……第二の作動レバー、１３ｂ，１５
ｂ……固定子、１３ｃ，１５ｃ……回転子。 FIG. 1 is a plan view showing the unfolded state and the folded state of the first blade assembly and the second blade assembly of the focal plane shutter ivy according to the present invention;
Fig. 2 is a partially cutaway plan view of the focal plane shutter according to the present invention corresponding to Fig. 1, and Fig. 3 is a characteristic line showing the relationship between the displacement angle and torque of the rotor in the first and second actuators. 4 are characteristic diagrams showing the running characteristics of the first and second blade groups. DESCRIPTION OF SYMBOLS 1... Shutter plate, 1a... Aperture, 2... First blade drive arm, 3... First blade support arm, 4... Second blade drive arm, 5... Second blade support arm, 6, 7...First feather group, 8
, 9... Second blade group, 10, 11... Position detection sensor, 12... Cover plate, 12a... Aperture, 13... First actuator, 14
...First actuation lever, 15...Second actuator, 16...Second actuation lever, 13b, 15
b... Stator, 13c, 15c... Rotor.

Claims

[Scope of utility model registration request]

The aperture is equipped with a first blade group and a second blade group for opening and closing the aperture, a rotor connected to the first blade group, and a stator for applying electromagnetic driving force to the rotor. The aperture includes a first actuator that reciprocates a first group of blades for opening and closing, a rotor connected to a second group of blades, and a stator for applying electromagnetic driving force to the rotor. It is equipped with a second actuator that reciprocates the second group of blades in order to open and close it, and the exposure is performed each time the first and second groups of blades move forward and backward in the same direction. In a focal plane shutter, by symmetrically shifting the mounting position of each stator relative to each rotor of the first and second actuators by the same angle from the reference position, the first and second blade groups can be moved during forward movement. 1. A focal plane shutter, characterized in that the focal plane shutter is configured such that a difference is generated between the initial speeds during the forward movement and the backward movement, and the manner in which the difference in the initial speed is generated is opposite between the first and second blade groups.