JPS61104681U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例のブロツク図、第２
図は或る先行技術を示す図、第３図は他の先行技
術を示す図、第４図は先行技術で示したシヤツタ
７の具体的構成を示す系統図である。 １，１ａ，２１…結像レンズ、２，２ａ，２２
…絞り手段、３，３ａ，２３…撮像手段、４，３
４…モータ、２６…制御回路、２９…リレー、３
０，３１…リレースイツチ、４２…蓄電池、４８
…リレーコイル。 Fig. 1 is a block diagram of an embodiment of the present invention;
FIG. 3 is a diagram showing a certain prior art, FIG. 3 is a diagram showing another prior art, and FIG. 4 is a system diagram showing a specific configuration of the shutter 7 shown in the prior art. 1, 1a, 21...imaging lens, 2, 2a, 22
...Aperture means, 3, 3a, 23...Imaging means, 4, 3
4...Motor, 26...Control circuit, 29...Relay, 3
0, 31...Relay switch, 42...Storage battery, 48
...Relay coil.

Claims (1)

【実用新案登録請求の範囲】 撮像手段と、 撮像手段よりも光経路の前方に配置され、絞り
量が変化可能な絞り手段と、 絞り手段を駆動する正逆回転可能なモータと、
撮像手段からの出力に応答し、撮像手段に与＊ら
れる光量が予め定めた値となるようにモータを制
御して、絞り手段による絞り量を変化させる制御
手段と、 制御手段によつてモータを電力付勢する主電源
と、 補助電源と、 主電源の停電を検出する手段と、 前記制御回路とモータとの間に介在され、前記
停電検出手段からの出力に応答し、主電源が停電
していないとき制御回路からの出力をモータに与
え、停電が発生したとき補助電源からの電力をモ
ータに与えてモータによつて絞り手段が全閉とな
るように駆動する切換スイツチ手段とを含むこと
を特徴とする撮像装置用自動絞り制御装置。[Scope of Claim for Utility Model Registration] An imaging means, an aperture means which is arranged in front of the optical path than the imaging means and whose aperture amount can be changed, and a motor capable of forward and reverse rotation for driving the aperture means;
a control means for controlling the motor in response to an output from the imaging means so that the amount of light applied to the imaging means becomes a predetermined value, and changing the amount of aperture by the aperture means; A main power source for energizing power, an auxiliary power source, a means for detecting a power outage in the main power source, and a means for detecting a power outage in the main power source, interposed between the control circuit and the motor, and responsive to an output from the power outage detection means to detect a power outage in the main power source. and a changeover switch means for applying an output from the control circuit to the motor when the motor is not in operation, and applying electric power from an auxiliary power source to the motor when a power outage occurs so that the motor drives the throttle means so that it is fully closed. An automatic aperture control device for an imaging device, characterized by: