JPS61193437U

JPS61193437U -

Info

Publication number: JPS61193437U
Application number: JP4332686U
Authority: JP
Priority date: 1986-03-24
Filing date: 1986-03-24
Publication date: 1986-12-02

Description

[Brief explanation of the drawing]

図面は本考案に係る自動焦点調節装置付カメラ
の実施例を示し、第１図は自動焦点調節装置の概
略構成図、第２図は焦点合わせ動作のフローチヤ
ート、第３図ａ，ｂは夫々レンズ駆動を行うモー
タの速度制御状態を示すグラフ、第４図はレンズ
駆動制御のフローチヤート、第５図はモータの始
動のフローチヤート、第６図はモータの駆動制御
回路のブロツク図、第７図はモータ駆動部の回路
図、第８図及び第９図は夫々モータの速度制御の
タイムチヤート、第１０図はレリーズボタン部分
の概略図である。１ａ……合焦判別手段、１ｂ……情報不足検出
手段、１ｃ……レンズ走査手段、１ｄ……走査規
制手段、１ｅ……走査規制解除手段、Ｍ……レン
ズ駆動手段、Ｓ_０……第１のスイツチ、Ｓ_１……
第２のスイツチ、ＳＭ……スイツチング手段。 The drawings show an embodiment of the camera with an automatic focus adjustment device according to the present invention, in which FIG. 1 is a schematic configuration diagram of the automatic focus adjustment device, FIG. 2 is a flowchart of the focusing operation, and FIGS. 3a and 3b are respectively Graph showing the speed control state of the motor that drives the lens. FIG. 4 is a flowchart of lens drive control. FIG. 5 is a flowchart of motor starting. FIG. 6 is a block diagram of the motor drive control circuit. This figure is a circuit diagram of the motor drive section, FIGS. 8 and 9 are time charts for controlling the speed of the motor, and FIG. 10 is a schematic diagram of the release button. 1a...Focus determination means, 1b...Insufficient information detection means, 1c...Lens scanning means, 1d...Scanning regulation means, 1e...Scanning regulation release means, M...Lens driving means, _S0 ...th 1 switch, S ₁ ...
Second switch, SM... switching means.

Claims

[Claim for Utility Model Registration] The first switch is closed by a pressing operation after the contact operation on the release button, and the second switch is closed when the amount of pressing operation on the release button exceeds a predetermined amount. and a focus determining means for determining whether or not the photographing lens is in the in-focus position when any of the switches are closed, based on a determination result by the focus determining means. A lens drive means for moving a photographing lens, an information deficiency detection means for outputting a focus determination failure signal when the optical information for focus detection obtained from the subject is insufficient for the focus determination means to determine focus, and this focus detection means. Lens scanning means for forcibly moving the photographing lens by the lens driving means in response to an indistinguishable signal; and scan regulating means for prohibiting the photographing lens from scanning after the lens scanning means completes one scan of the photographic lens. In the camera with an automatic focus adjustment device, when the first switch is in the closed state and the second switch is shifted from the closed state to the open state, the scanning of the photographing lens by the scanning regulating means is controlled. A camera with an automatic focus adjustment device that is equipped with a means for canceling the scanning restriction to cancel the prohibition. A first state in which the switching means permits lens driving by the lens driving means even after the focus determining means determines that the photographing lens is in the in-focus position, and a first state in which the lens is once determined to be in the in-focus position. After that, the lens is switched to a second state in which driving of the lens by the lens driving means is prohibited, and the first state is changed by closing only the first switch, and
The camera with an automatic focusing device according to claim 1, which is switched to the second state by closing the first switch and the second switch.