JPH081103U - Camera operation control device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a camera capable of simplifying the structure thereof, since a means for surely detecting whether or not a power supply battery has just been loaded is not required. A control means for starting a control operation for controlling an operation of a camera upon power feeding, a battery lid for opening and closing a storage chamber for storing a power supply battery, and a battery cover for storing a 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 is open or closed, the open / closed state of the battery lid is detected, and an open signal is issued when the battery lid is opened, and a close signal is issued when closed. The control means has an open / close detection means for outputting, and the control means determines the output of the open / close detection means with the start of the control operation accompanying the power feeding, and the power supply battery determines that the open signal is output. The first process to be performed when loaded is performed, and when the closing signal is output, the second process different from the first process is performed.

Description

[Detailed description of the device]

[0001]

TECHNICAL FIELD OF THE INVENTION

 The present invention relates to a camera operation control device.

[0002]

[Prior art]

 The camera controlled by the 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. In such a camera, the film counter value is stored until it is updated by the next winding, and the counter value is continuously displayed on the display device.

However, since a so-called volatile memory (for example, RAM), which loses stored information when the power supply is cut off, is used for this memory, the information is stored even if the power switch is turned off. By keeping the power supply to the device, the stored contents are saved and the number of shots can be displayed based on the film counter value when the power switch is turned on again. However, once the power supply is completely cut off for reasons such as the replacement of the power supply battery, the contents of the memory are lost and the contents of the memory become undefined, 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 an initial value so that the display device displays, for example, the letter "S". There is something. For that purpose, it is detected whether the power supply battery is just loaded or not, and the memory is initialized only when it is 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.

[0005]

The means for surely detecting whether or not the power supply battery has just been loaded and performing the initialization operation is a so-called power-on reset using the output of the CR time-determining circuit. However, it requires a resistor and a capacitor, and its time constant must be strictly controlled, which has been a factor in increasing the manufacturing cost.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a control means (2) for starting a control operation for controlling the operation of a camera upon power feeding, a battery lid for opening and closing a storage chamber in which a power battery is stored, A camera operation control device having a power supply path (10) for starting power supply when a power supply battery is stored in a storage chamber regardless of whether the battery cover is opened or closed. The open / close detection means (4) outputs a open signal when the power is on and a close signal when the power is closed, and the control means is configured to detect the open / close with the start of the control operation accompanying the power supply. If the open signal is output, the first process (steps S4 to S5) that should be performed when the power battery is loaded is performed, and if the close signal is output, A second process different from the first process And to carry out (step S6~S7).

[0007]

[Embodiment of device]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a control block diagram in the present invention. In FIG. 1, a power supply battery 1 applies a voltage to a CPU 2 and a motor control circuit 3. The power supply path 10 including the terminals connected to both electrodes of the power supply battery 1 is used for supplying power regardless of whether the battery lid for opening or closing the storage chamber is opened or closed by only storing the power supply battery 1 in the battery storage chamber. 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. The open / close detection switch 4 is turned off when the battery lid is closed after loading the battery, and is turned on when the battery lid is opened. The CPU 2 is also connected to 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 below. The lens barrel drive motor 8 is driven by the motor drive circuit 3, and the lens barrel is driven by this motor 8. The film winding motor 9 feeds the film in response to a motor drive signal from the motor drive circuit 3.

Next, a processing procedure performed in the CPU 2 will be described with reference to the flowchart of FIG. In FIG. 2, first, in step S1, some operation is performed, for example, by loading a battery in the battery storage chamber, turning on a power switch, half-pressing a release button, etc., to start power supply to CPU2. to start. Then, in step S3, it is determined whether or not the battery cover is opened by whether the battery detection switch 4 is ON or OFF.

If YES in step S3, that is, if the battery lid is opened, it is estimated that the battery was replaced immediately before and the CPU 2 was started by loading the battery. In this case, since the power supply is temporarily cut off when the battery is replaced, the contents of the volatile memory such as RAM are lost. Therefore, in step S4, an operation of initializing the memory contents 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 case back 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 into the camera), or some load is applied while the lens barrel is being driven electrically, and the power to the lens barrel drive motor is cut off. There is data that indicates that

Then, in step S5, the reset operation of the lens barrel and the phase alignment of the film are performed. By the resetting 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. When the film is in the midst of winding, the remaining winding is done electrically by the film phasing. On the other hand, if NO in step S3, that is, if the battery lid is closed, it is presumed that the CPU 2 was not activated immediately before and the CPU 2 was activated by turning on the power switch, half-pressing the release button, or the like. It In this case, since the power supply was continued, after obtaining the information on the previous shooting stored in the memory, for example, the remaining film number information, the lens barrel is retracted to the retracted position in step S6. In step S7, the film phase 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 activated, the memory contents are initialized, while the battery cover is closed. When this is detected, 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 structure can be simplified without increasing the manufacturing cost.

[0012]

[Effect of device]

 According to the present invention, the control means performs the first processing when it is detected that the battery lid is opened or closed, and the second processing when the battery lid is not opened or closed. The signal output by the open / close detection means can be treated as one information input signal, for example, by performing the processing. Therefore, there is no need for means for surely detecting whether or not the power supply battery has just been loaded, so that the configuration can be simplified.

[Submission date] October 4, 1995

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

[Problems to be solved by the device]

 By the way, in a camera that does not feed the film when the power is turned on when the battery is replaced, if the battery is exhausted before the film is advanced one frame after the shooting process or when the film is being advanced one frame. In this case, since the shooting starts from that state when the power is turned on, one frame is exposed before and after the battery is replaced.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention relates to a camera operation control device for feeding a film loaded by being powered by a power battery, and a battery for opening and closing a storage chamber for storing the power battery. A lid; an open / close detecting means for detecting an open / closed state of the battery lid and outputting an open signal when the battery lid is open and a closing signal when the battery lid is closed; and an output of the open / close detecting means in association with the power supply. And a control means for performing the film winding operation when the release signal is output.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

[0012]

[Effect of device]

 According to the present invention, when it is detected that the battery lid is opened or closed, the film winding operation is performed, so that the frame set in the aperture before replacing the battery is advanced and replaced. It will not be overexposed during later shooting.

[Brief description of drawings]

FIG. 1 is a block diagram of an operation control device showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure.

[Explanation of symbols]

 1 power supply battery 2 CPU 3 motor drive circuit 4 open / close detection means 10 power supply path

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[Procedure amendment]

[Submission date] October 4, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (2)

[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 a 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 them has an opening / closing detection means for outputting, and the control means determines the output of the opening / closing detection means with the start of the control operation accompanying the power feeding, and the power supply when the opening signal is output. An operation control device for a camera, which performs a first process to be performed when a battery is loaded, and performs a second process different from the first process when the closing signal is output. 2. The control means has a memory for storing information relating to a previous shooting, the first processing includes an initialization operation of the memory, and the second processing is stored in the memory. 2. The operation control device for a camera according to claim 1, further comprising an operation based on information regarding a previous shooting operation.