JPH085461Y2 - Camera operation control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an operation control device for a camera.

(Prior Art) A camera controlled by a CPU has a memory for storing information relating to the previous photographing, for example, information on a film counter value indicating the number of photographed films. Such a camera stores the film counter value until it is updated by the next winding, and continuously displays the counter value on a display device.

However, this memory uses so-called volatile memory (for example, RAM) that loses stored information when the power supply is cut off, so power is retained for information storage even when the power switch is turned off. By doing so, the stored contents are saved, and when the power switch is turned on again, the number of shot images can be displayed based on the film counter value. However, once the power supply is completely cut off due to the replacement of the power supply battery, the contents of the memory will be lost and the contents of the memory will be indefinite, so if the film count value is displayed based on it. Incorrect display was made.

Therefore, immediately after the power supply battery is loaded, the contents of the memory are initialized and the film counter value is set to the initial value so that, for example, the character "S" is displayed on the display device. is there.

For that purpose, it is detected whether or not the power supply battery is just loaded, and the memory is initialized only when the power battery is just loaded, otherwise the film counter is displayed to display the number of shots at the next shooting. You need to save the value. Therefore, a means for surely detecting whether or not the power supply battery has just been loaded is needed.

(Problems to be solved by the invention) It is possible to reliably detect whether the power supply battery has just been loaded,
As a means for performing the initialization operation, there is a so-called power-on reset that uses the output of the CR time determination circuit,
Since a resistor and a capacitor are required and the time constant thereof needs to be strictly controlled, it has been a factor of increasing the manufacturing cost.

(Means for Solving Problems) In order to solve the above-mentioned problems, the present invention provides a control means for starting a control operation for controlling the operation of a camera upon power feeding, and a storage chamber for storing a power supply battery. A battery lid that opens and closes,
In an operation control device of a camera having a power supply path for starting power supply regardless of whether the battery lid is opened or closed when a power battery is stored in the storage chamber, the open / closed state of the battery lid is detected,
The control means includes an opening / closing detection means for outputting an open signal when the opening is performed and a closing signal when the closing is performed, and the control means includes a memory for storing information regarding a previous photographing, and the control operation according to the power supply. With the start of, the output of the open / close detection means is determined, and when the open signal is output, the memory initialization operation to be performed when the power supply battery is loaded is performed, and the close signal is output. When it is output, the operation based on the information about the previous shooting stored in the memory is performed.

(Operation) According to the present invention, the control means performs the initialization operation of the memory when it is detected that the battery lid is opened or closed, and it is detected that the battery lid is not opened or closed. Then, the signal output by the open / close detection means can be treated as one information input signal, such as performing an operation based on the information about the previous shooting stored in the memory. Therefore, there is no need for a means for surely detecting whether or not the power supply battery has just been loaded, so that the configuration can be simplified.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a control block diagram in the present invention. In FIG. 1, the power supply battery 1 applies a voltage to the CPU 2 and the motor control circuit 3. The power supply path 10 including terminals connected to both electrodes of the power supply battery 1 can be supplied with power only by storing the power supply battery 1 in a battery storage chamber (not shown) regardless of whether the battery lid for opening or closing the storage chamber is opened or closed. Is configured to start. An open / close detection switch 4 for detecting whether or not the battery cover is opened is connected to the power supply path and the CPU 2. This open / close detection switch 4 becomes OF when the battery lid is closed after the battery is loaded.
It becomes F, and it turns ON when the battery cover is opened. The CPU 2 is also connected with switches 5 and 6 that form an encoder for detecting the position of the lens barrel. Further, the CPU 2 is connected with a phase switch 7 which outputs one pulse signal each time the film is wound up one frame. The CPU 2 controls the motor drive circuit 3 based on the detection results of the switches 4, 5, and 6 by the procedure described later. The lens barrel drive motor 8 is driven by the motor drive circuit 3.
Drives the lens barrel. The film winding motor 9 feeds the film in response to a motor drive signal from the motor drive circuit 3.

Next, the processing procedure performed in the CPU 2 will be described with reference to the flowchart of FIG.

In FIG. 2, first, in step S1, power is supplied to the CPU2 by some operation, for example, by loading a battery in the battery storage chamber, turning on a power switch, and half-pressing the release button. to start. And
In step S3, it is determined whether the battery cover is opened or not by whether the battery detection switch 4 is ON or OFF.

If YES in step S3, that is, if the battery cover is open, it is estimated that the battery was replaced immediately before and the CPU 2 was started by loading the battery. In this case, the power will be cut off when replacing the battery.
The contents of volatile memory such as RAM are lost. Therefore, in step S4, the memory content initialization operation is performed. The contents of the memory to be initialized include, for example, the data of the film counter value indicating the number of shots of the film and the data indicating that the back cover is not opened after the electric rewinding of the film (this is the used film). Is the data indicating that the lens barrel is loaded in the camera), or that some load is applied while the lens barrel is being driven electrically, and the power supply to the lens barrel drive motor is cut off. There is data etc. that indicate that.

Then, in step S5, the lens barrel reset operation and the film phase adjustment are performed. By the reset operation of the lens barrel, the lens barrel is retracted to the retracted position where the amount of protrusion from the camera body is the shortest. In the phase alignment of the film, the remaining winding is performed electrically when the film is being wound.

On the other hand, if NO in step S3, that is, if the battery lid is closed, it is assumed that the battery was not replaced immediately before and the CPU2 was activated by turning on the power switch, half-pressing the release button, or the like. . In this case, since the power supply was continued, after obtaining the information about the previous shooting stored in the memory, for example, the remaining film number information, etc., the lens barrel is retracted to the retracted position in step S6, Step S7
Then, the phase of the film is adjusted based on the detection signal of the phase switch 7.

According to the above control, when the battery detection switch 4 detects that the battery cover is opened after the CPU 2 is started, the memory contents are initialized, while the battery cover is detected to be closed. Then, the signal output by the opening / closing detection means can be treated as one information input signal, such as performing an operation based on the information about the previous shooting stored in the memory. Therefore, there is no need for a means for surely detecting whether or not the power supply battery has just been loaded, so that the manufacturing cost is not increased.
Furthermore, the structure can be simplified.

According to the present invention, the control means performs the initialization operation of the memory when it is detected that the battery lid is opened or closed, and the battery lid is not opened or closed. When detected, the signal output by the opening / closing detecting means can be treated as one information input signal, such as performing an operation based on the information relating to the previous photographing stored in the memory. Therefore, there is no need for means for surely detecting whether or not the power supply battery has just been loaded, so that the structure thereof can be simplified.

[Brief description of drawings]

FIG. 1 is a block diagram of an operation control device showing an embodiment of the present invention, and FIG. 2 is a flowchart showing a processing procedure. (Explanation of symbols of main parts) 1 ... power supply battery, 2 ... CPU 3 ... motor drive circuit, 4 ... open / close detection means 10 ... power supply path

Claims (1)

[Scope of utility model registration request] 1. A control means for starting a control operation for controlling an operation of a camera when power is supplied, a battery lid for opening and closing a storage chamber for storing a power supply battery, and a storage device for storing the power supply battery in the storage chamber. In an operation control device for a camera having a power feeding path for starting power feeding regardless of whether the battery lid is opened or closed, the open / closed state of the battery lid is detected, and an open signal is output when the battery lid is opened, and a closing signal is output when the battery lid is closed. , And each of which has an opening / closing detection unit for outputting, the control unit includes a memory for storing information regarding a previous shooting, and determines the output of the opening / closing detection unit with the start of the control operation accompanying the power supply. When the open signal is output, the memory initialization operation that should be performed when the power supply battery is loaded is performed, and when the close signal is output, the previous shooting stored in the memory is performed. Performing the operation based on the information relating to the operation control device for a camera according to claim.