JP2001290188A - Erroneous photographing preventive device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent unintentional photographing in a different state from a set state when a power source is turned off when the power source is turned on again after it is turned off once. SOLUTION: When it is set in the state that the power source is turned off by performing operation so as to turn off a main switch 9, a controller 1 reads the set contents of a diaphragm dial 6 and stores them in a nonvolatile memory or the like so as to be set in a suspended state. In the case of returning to a photographing standby state by the operation of one of operation parts such as a release switch 5, the diaphragm dial 6, a rear cover switch 7, a mode switch 8 and a main switch 9 when a camera is set in the suspended state in which the power source is turned off, the state of the diaphragm dial 6 is checked first, and compared with the state before suspension, and when they do not coincide and are different as the result of the comparison, warning to the effect that the state is fluctuated is given by an outside LCD 3 in the controller 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for preventing erroneous photographing in an erroneous setting state of a camera.
The present invention relates to an erroneous photographing prevention device for a camera which prevents erroneous photographing in an erroneous setting state due to careless operation of the camera.

[0002]

2. Description of the Related Art A camera can be a conventional camera using a so-called silver halide film, a so-called silver halide camera, or an electronic camera such as a so-called digital camera that records a captured image on an electronic recording medium. The user sets various photographing modes and photographing conditions, and performs photographing according to the set contents. The shooting modes include an auto mode that automatically sets all or part of the shooting conditions, a manual mode that sets shooting conditions by manual operation, a strobe mode that sets flash emission control, and a special mode that performs special shooting. Mode. In auto mode,
General normal mode, distant view mode suitable for distant view, portrait mode suitable for portrait, snap mode suitable for snap shooting, TV mode suitable for TV (television) screen shooting, multiple exposure mode for multiple exposure shooting, etc. There is.

Further, the flash mode includes an automatic flash mode for automatically firing the flash, a forced flash mode for forcing the flash to fire (for example, a daylight sync mode), a flash non-use mode for inhibiting the flash, and the like. There is. In manual mode, exposure conditions such as shutter speed and aperture value (so-called F-number)
The photographing conditions such as the subject distance, the photographing sensitivity such as the film sensitivity, and other settings are set by automatic ranging or manual operation. The setting or change of the various conditions relating to the above-described photographing is performed by the photographer operating an operation unit such as an operation button, an operation dial, or an operation lever. If it is desired to retain the settings made by the operation buttons, the settings are electrically stored. In an operation unit such as an operation dial or an operation lever that changes the setting contents at a mechanical position, unless the operation position is changed, instead of retaining the setting contents, a mechanical operation such as an operation dial or an operation lever is performed. When the position changes, the setting changes.

[0004] These setting conditions for photographing are set according to photographing conditions such as weather and time, a photographing environment such as a photographing place, a photographing visual field including a subject, and a photographer's intention of drawing. Therefore, when the shooting conditions, shooting environment, shooting field of view, drawing intention, and the like greatly change, setting conditions are often largely changed, but conversely, the shooting conditions, shooting environment, shooting field of view, and drawing intention are changed. When the intention or the like does not change much, shooting is often performed under the same setting conditions. Since the camera is generally a portable device carried by a photographer, the camera is suspended from a shoulder or neck by a strap or stored in a bag or the like and transported. For this reason, when carrying, the above-mentioned operation part may inadvertently hit or rub against the body or other things, and the setting conditions may fluctuate.

On the other hand, in order to prevent inadvertent fluctuation of a mechanical operation unit such as an operation dial or an operation lever, a mechanism for mechanically locking such a mechanical operation unit may be provided. However, it is difficult to provide a mechanism for mechanically locking a mechanical operation unit in a camera that requires miniaturization and low cost. That is, if a mechanism for mechanically locking the mechanical operation unit is provided, the size of the camera is increased and the cost is increased. 2. Description of the Related Art Conventionally, techniques for preventing inadvertent fluctuation of an operation unit include those disclosed in Japanese Patent Application Laid-Open Nos. H8-328078 and H9-33978. The former technique disclosed in Japanese Patent Application Laid-Open No. H8-328078 retains a previous setting mode for a predetermined time immediately after the power is turned off.

That is, after the power is turned off, various setting states before the power is turned off are maintained for a predetermined time, and after the predetermined time has elapsed, the settings are reset to return to the standard setting state. I have. According to the technique disclosed in JP-A-8-328078, the previous operation setting state is maintained for a predetermined time even when the power is turned off. Therefore, when the power is turned on again within the predetermined time, Photographing can be performed with the previous setting state. This is a technique particularly suitable for a camera provided with a so-called auto power-off mechanism for automatically turning off a power switch after a certain period of time without any operation to prevent power consumption. In other words, in a case where shooting is continuously performed under a common situation, shooting is generally performed in substantially the same setting state without largely changing the setting state. In such a situation, during shooting, for example, a state in which no operation such as release is performed for a certain period of time may continue for a certain period of time or more, and the auto power-off mechanism may operate to turn off the power. In such a case, if the various setting states return to the standard state even if the power is immediately turned on again, it is not easy to set the same appropriate setting state as before, and the operation for that is also complicated. .

Therefore, the former Japanese Patent Application Laid-Open No. 8-32807 has been proposed.
In Japanese Patent Laid-Open Publication No. 8 (1999), when the power is turned on again within a short period of time within a predetermined time, shooting can be performed with the previously set state. In the latter technique disclosed in Japanese Patent Application Laid-Open No. 9-33978, an operation unit such as a mode setting switch is provided with an option for locking a set value as an operation option. When this locked state is selected, for example, An operation other than a predetermined operation such as a release button is invalidated. That is, a state in which the setting state is locked can be selected, and the setting state is prevented from being changed carelessly against intention. In this way, under common circumstances,
When photographing is performed continuously, photographing can be easily performed in a fixed setting state.

[0008]

SUMMARY OF THE INVENTION The former JP-A-8-32
The technique disclosed in Japanese Patent Publication No. 8078 discloses that the setting state is stored for a predetermined time, but after the predetermined time, the setting state returns to the standard state. Further, in the former Japanese Patent Application Laid-Open No. H8-328078, setting conditions such as a dial which mechanically change the setting state are not taken into consideration. It has not been clarified what to do if the price fluctuates. Further, the latter technique disclosed in Japanese Patent Application Laid-Open No. 9-33978 makes it possible to lock a setting state. If the user does not perform an operation to release the selection of the locked state, the user cannot change the state.
If only the release can be operated in the locked state, the power cannot be turned off in the locked state. On the other hand, if the power can be turned off in the locked state, After turning on, the setting operation cannot be performed until the locked state is released.

Therefore, when the power is turned off, the dials and levers for setting, etc. may be activated by accidental contact with the photographer's body or other objects without the photographer's notice. It is necessary to prevent a photographing result from being contrary to the photographer's intention. In order to reliably prevent erroneous operation of the dial or lever, generally, a stopper mechanism that mechanically locks these is provided.
It is conceivable to prevent these settings from fluctuating even if they come into contact with other objects. However, a stopper mechanism such as a dial or lever
In many cases, the production cost is high and the space required for disposing these mechanisms cannot be sufficiently secured. If you have cost or space constraints,
If such a stopper mechanism is not provided, it may move when the photographer does not intend, such as when the camera is stored in a bag or the like. In such a case, the photographer may fail to photograph the photographer without noticing it.

For example, a program photographing mode (measurement of the brightness of a subject, and a photographing condition is determined in accordance with a combination program of an aperture value (F value) and an exposure time (shutter speed) set in advance corresponding to a subject light amount (subject brightness). Set)
Let us consider a case where the power is once turned off in the state where the photographing is being performed. In this case, for example, when the power is off, the lever for mode setting, for example, moves, and the aperture value is set to F2.
When the aperture priority shooting mode is set to 8, the power is turned on again, and when shooting is performed again, the proper exposure cannot be obtained even at the lower limit of the exposure time, that is, even at the highest shutter speed. Overexposure may occur. Also, the power is turned off in a state where the photographing is being performed with the aperture value set to F2.8, and when the aperture value is set to, for example, F22, the power is turned on again and the photographing is performed. It may be.

On the other hand, in order to prevent the dial and lever for various setting operations from being inadvertently operated with a small force, the resistance to the operation is increased, and if a large force is not applied, the dial and the lever may not operate. If it is not operated, the operability at the time of normal operation is deteriorated, and troubles such as a pain of a finger due to the operation also occur. The present invention has been made in view of the above-described circumstances, and when the power is once turned off and then turned on, it is possible to prevent an unintentional shooting in a state different from the setting state when the power is turned off. And
It is an object of the present invention to provide a camera erroneous photographing prevention device that can easily be intentionally set to a condition different from a setting state when the power is turned off.

[0012] It is an object of the present invention to ensure that, when the power is turned on, an image is erroneously photographed in a setting state different from the setting state immediately before the power was turned off. Another object of the present invention is to provide an apparatus for preventing erroneous photographing of a camera, which can be effectively and effectively prevented, and if desired, can be set to a condition different from the setting state when the power is turned off. A second object of the present invention is to provide an apparatus for preventing erroneous photographing of a camera which can suppress photographing at the same time as a warning when a change in a setting state is detected, thereby effectively preventing failed photographing. It is in. An object of claim 3 of the present invention is to enable photographing in a conventional state regardless of a setting state by a dial or a lever when a change in a setting state is detected, thereby effectively preventing failed photographing. An object of the present invention is to provide an apparatus for preventing erroneous photographing of a camera.

An object of the present invention is to provide an apparatus for preventing erroneous photographing of a camera which can reliably warn a photographer with a simple configuration when a change in a setting state is detected. To provide. An object of claims 10 to 12 of the present invention is to provide a camera erroneous photographing prevention apparatus which can appropriately release a warning to a photographer when a change in a setting state is detected. .

[0014]

According to a first aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, comprising the steps of: photographing a subject; recording the subject image on a recording medium; A camera capable of controlling and setting an operation condition relating to photographing of the subject, a power operation unit for turning on / off an operation power of the camera, a setting operation unit for changing a setting of the operation condition, and the power operation unit. The setting state by the setting operation means is acquired and stored when the operation power supply is turned off, and the setting state by the setting operation means is newly acquired and stored before the operation power supply is turned on by the power supply operation means. The state collating means for comparing and collating with the set state when the operation power supply is turned off, and the state collation means, the setting state between the time when the operation power supply is turned off and the time when the operation power supply is subsequently turned on is incorrect. If it is judged that the 致 is characterized by comprising a warning means for warning the operation state change.

According to a second aspect of the present invention, the erroneous photographing prevention apparatus for a camera according to the present invention further comprises photographing control means for prohibiting a photographing operation of the camera while the warning means gives a warning. Features. The apparatus for preventing erroneous photographing of a camera according to the present invention according to claim 3, wherein when a photographing operation is performed while a warning is issued by the warning means, the operation power-off operation stored by the state matching means is performed. And a photographing control means for controlling a photographing operation of the camera in accordance with information on a setting state by the setting operation means. According to a fourth aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, wherein the warning unit includes a unit for displaying a warning by also using a display unit provided for displaying other information. .

According to a fifth aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, wherein the warning means includes a dedicated warning display means for performing only a warning display. According to a sixth aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, wherein the warning display means includes a light emission display means. According to a seventh aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, wherein the warning display means includes a light emission display means. An erroneous photographing prevention device for a camera according to the present invention described in claim 8 is characterized in that the warning display means includes a sound generation means. According to a ninth aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, wherein the warning display unit includes a sound generation unit.

According to a tenth aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, comprising the steps of:
It is characterized by further comprising means for ending by re-operation of setting change of the operating condition by the setting operation means. The erroneous photographing prevention device for a camera according to the present invention described in claim 11, wherein a warning operation by the warning means is performed by:
It is characterized by further comprising means for terminating the camera by a shooting operation of the camera. The erroneous photographing prevention device for a camera according to the present invention as set forth in claim 12, wherein the warning operation by the warning unit is at least one of an operation of turning off the operation power supply by the power supply operation unit and an operation of opening and closing the back cover of the camera. It is characterized by further comprising means for terminating by one.

[0018]

According to a first aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, which photographs an object, records the image of the object on a recording medium, and controls and sets operating conditions for photographing the object. And acquiring and storing a setting state by a setting operation unit for changing a setting of the operation condition when the operation power supply is turned off by a power operation unit for turning on / off an operation power supply of the camera; At the time of the operation of turning on the operation power supply, a setting state by the setting operation means is newly acquired, and state comparison means for comparing and comparing with the previously stored setting state of the operation power supply when off is provided. If the settings do not match between when the operating power is off and when it is subsequently on,
A warning means warns about a change in the operation state. With such a configuration, when the power is once turned off and then turned on,
The settings are compared and compared, and if they do not match, a warning is issued to ensure that the camera is mistakenly photographed in a setting different from the last setting when the power was turned off, contrary to the wishes of the photographer. And, if intended,
It is also easy to set conditions different from the setting state when the power is turned off.

The erroneous photographing prevention apparatus for a camera according to a second aspect of the present invention further comprises photographing control means for prohibiting a photographing operation of the camera while the warning means gives a warning. With such a configuration, especially when a change in the setting state is detected, the shooting is suppressed at the same time as the alarm,
Unsuccessful shooting can be effectively prevented. The erroneous photographing prevention device for a camera according to claim 3 of the present invention is arranged such that, when a photographing operation is performed while a warning is issued by the warning unit, the setting at the time of the operation power-off operation stored by the state collation unit. The camera further includes a photographing control unit that controls a photographing operation of the camera according to information on a setting state of the operation unit. With such a configuration, in particular,
When a change in the setting state is detected, shooting can be performed in the previous state regardless of the setting state by the dial or the lever, and failure shooting can be effectively prevented.

According to a fourth aspect of the present invention, there is provided an apparatus for preventing erroneous photographing of a camera, wherein the warning means includes means for displaying a warning by also using display means provided for displaying other information. With such a configuration, in particular, when a change in the setting state is detected, it is possible to reliably warn the photographer of the change in the setting state with a simple configuration. In the apparatus for preventing erroneous photographing of a camera according to claim 5 of the present invention, the warning means includes a dedicated warning display means for performing only a warning display. With such a configuration, in particular, when a change in the setting state is detected, it is possible to reliably warn the photographer of the change in the setting state with a simple configuration. In the apparatus for preventing erroneous photographing of a camera according to claim 6 of the present invention, the display means includes a light emitting display means. With such a configuration, in particular, when a change in the setting state is detected, it is possible to reliably warn the photographer of the change in the setting state with a simple configuration.

[0021] In the apparatus for preventing erroneous photographing of a camera according to claim 7 of the present invention, the warning display means includes a light emission display means.
With such a configuration, in particular, when a change in the setting state is detected, it is possible to reliably warn the photographer of the change in the setting state with a simple configuration. In the camera erroneous photographing prevention apparatus according to claim 8 of the present invention, the display means includes a sound generating means. With such a configuration, in particular, when a change in the setting state is detected, it is possible to reliably warn the photographer of the change in the setting state with a simple configuration. According to a ninth aspect of the present invention, the warning display unit includes a sound generation unit. With such a configuration, in particular, when a change in the setting state is detected, it is possible to reliably warn the photographer of the change in the setting state with a simple configuration.

According to a tenth aspect of the present invention, an apparatus for preventing erroneous photographing of a camera further comprises means for terminating the warning operation by the warning means by re-operating the setting change of the operation condition by the setting operation means. With such a configuration, particularly, a warning to the photographer when a change in the setting state is detected can be appropriately released. Claim 1 of the present invention
The apparatus for preventing erroneous photographing of a camera according to 1 further includes means for terminating a warning operation by the warning means by a photographing operation of the camera. With such a configuration, particularly, a warning to the photographer when a change in the setting state is detected can be appropriately released.

According to a twelfth aspect of the present invention, there is provided a camera erroneous photographing prevention device, wherein the warning operation by the warning means is at least one of an operation of turning off the operation power supply by the power supply operation means and an operation of opening and closing the back cover of the camera. Means for terminating by one is further provided. With such a configuration, particularly, a warning to the photographer when a change in the setting state is detected can be appropriately released.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 to FIG. 6 are views for explaining an erroneous photographing prevention device for a camera according to a first embodiment of the present invention. FIG. 1 is a block diagram showing the configuration of a camera incorporating the erroneous image capturing prevention apparatus according to the first embodiment of the present invention, and FIG. 2 schematically shows a mode switching operation by a mode switch in the camera of FIG. FIG. 3
FIG. 4 is a flowchart for explaining the operation of storing the aperture dial value at the time of suspension in the camera of FIG. 1, and FIG.
5 is a flowchart for explaining the operation of the camera when returning from the hibernation state, FIG. 5 is a diagram schematically showing the state transition in the camera of FIG. 1, and FIG. 6 is an external liquid crystal display device in the camera of FIG. FIG. 7 is a schematic diagram for explaining a warning display using the film counter display of FIG.

The camera shown in FIG. 1 includes a control device 1, a memory 2, an external liquid crystal display device (hereinafter referred to as "external LCD") 3, a liquid crystal display device in a finder (hereinafter referred to as "LCD in a finder") 4, and the like. Release switch 5, aperture dial (hereinafter, referred to as "F dial") 6, back cover switch 7, mode switch 8, main switch 9, sounding body 10, and display light emitting diode (hereinafter referred to as "display LED"). 11). In this case, the camera is a silver halide camera using a conventional silver halide film. However, even in the case of an electronic camera called a digital camera or the like that electronically records data on a recording medium such as a memory, a magnetic disk or an optical disk. It can be configured in substantially the same manner.

The control device 1 is a C / C configured using a so-called microprocessor or microcontroller or the like.
This is a PU (Central Processing Unit), and the control device 1 controls all functions of the camera. The memory 2 is, for example, EEPRO
It is configured using a nonvolatile memory such as M (Electronically Erasable Programmable Read Only Memory), and is used as an adjustment memory for storing data such as adjustment data, operation data, and customization setting data. The memory 2 can perform writing and reading of the data by the control device 1. The F dial 6 is a dial for setting an aperture at the time of photographing. By operating the F dial 6, a program mode (P mode) and an aperture value (F value) can be selectively set. The aperture value is, for example, F
An aperture value in the range of 2.8 to F22 can be set in 0.5 EV steps.

External LCD 3 and Viewfinder LCD 4
Is a display for displaying shooting counter information and mode information of the camera. The display contents of the external LCD 3 and the viewfinder LCD 4 can be controlled by the control device 1. The external LCD 3 displays, for example, a photographing counter (film counter to a photographing frame counter in the case of an electronic camera called a digital camera or the like) as shown in FIG. 6, an operation mode, a strobe state, a remaining battery level, and the like. I do. The LCD 4 in the finder displays, for example, the set shutter speed, aperture value, distance measurement result, and the like. The release switch 5 is a switch for performing photographing. For example, the release switch 5 performs a two-step operation depending on the pressing depth, performs distance measurement in a half-pressed state of the first step, and performs photographing in a fully-pressed state of the second step. The back cover switch 7 is turned on / off by opening and closing the back cover of the film loading unit to detect the exchange of the film. The mode switch 8 sets the shooting operation mode and the like of the camera.

In this case, for example, as shown in FIG. 2, when the mode switch 8 is pressed once in the normal mode, the dial recovery mode is set, and when the mode switch 8 is pressed again, the mode returns to the normal mode. That is, each time the mode switch 8 is operated, a toggle operation is performed in which the dial recovery mode and the normal mode are alternately repeated. The mode set by the mode switch 8 is stored until the battery is replaced, for example. The main switch 9 is a switch for controlling all power supplies of the camera. When the main switch 9 is turned on, photographing is possible. When the main switch 9 is off, shooting is prohibited, current consumption is reduced, and the entire camera is put into a power-off rest state. The sounding body 10 is an electro-acoustic converter such as an electronic buzzer or a small speaker that converts an electric signal into an acoustic signal, and generates an alarm sound or the like under the control of the control device 1.

A display light emitting diode (hereinafter referred to as "display L
The ED 11) is controlled by the control device 1 and emits light or flashes for distance measurement status, strobe information, state change warning, and the like. One or a plurality of display LEDs 11 are provided, and display contents are identifiable by individually or continuously lighting and blinking, or by changing a blinking cycle. These sounding body 10 and display LED 11 are also used for displaying a self-timer. The control device 1 includes a release switch 5,
While the operation units such as the F dial 6, the back cover switch 7, the mode switch 8 and the main switch 9 are not operated,
The power is turned off by turning off the main switch 9 after a predetermined time that has been set in advance or the main switch 9 is turned off, and the apparatus is brought into a sleep state. In that case, the contents of the internal memory of the control device 1 are saved. In the case of the suspension by the timer operation for monitoring the elapse of the predetermined time, the operation returns to the photographing standby state by operating any switch of the operation unit (see FIG. 5). When the main switch 9 is turned off to stop, the main switch 9 is turned on again to return to the shooting standby state (see FIG. 5).

Assuming that the mode is set to the dial recovery mode by the setting of the mode switch 8, for example, the set value of the F dial 6 immediately before the above-mentioned hibernation state is stored in the internal memory of the control device 1, or It is stored in the nonvolatile memory 2 for adjustment. That is, when the dial recovery mode is set, as shown in FIG. 3, whether a predetermined time, for example, 3 minutes has elapsed without any operation of the operation unit (step S11), or
When the main switch 9 is turned off (step S12), the control device 1 reads the setting contents of the F-dial 6 and stores it in the internal memory of the control device 1 or the nonvolatile memory 2 for adjustment. From (Step S13)
The power is turned off and the system is put into a sleep state (step S14).

When the camera is in a power-off state, that is, in a rest state, the release switch 5, the F dial 6,
When the camera 1 returns to the shooting standby state by operating any of the operation units such as the back cover switch 7, the mode switch 8, and the main switch 9, the control device 1 first checks the state of the F dial 6, A comparison is made with the state before pausing stored in the memory 2 or the like. If the comparison result shows that the two do not match and differ from each other, a warning is given to the effect that the state has changed (corresponding to claim 1). For example, the external LCD 3 blinks a specific segment, for example, a segment 31 for displaying a film counter as shown in FIG. (Corresponding to claim 4). During the warning display, the photographing operation of the camera is prohibited by, for example, disabling the release switch 5 (corresponding to claim 2).

Alternatively, when the photographing operation is performed during the warning display instead of prohibiting the photographing, the photographing operation is stored in the memory 2 or the like immediately before the sleep state regardless of the state of the operation unit such as the F dial 6. The shooting operation may be performed with the set value. In this case, a warning is left for a predetermined period of time after the photographing operation, so that the user is made aware of the warning state in which photographing is performed according to the state before the pause. Do). If the F dial 6 is operated again during the warning display period, it is considered that the user has re-recognized the aperture value (F value), so the warning display is stopped and the normal operation state is stopped. (Corresponding to claim 10). Even after taking a picture once or re-operating the back cover etc. for film exchange etc., if the warning display remains uncomfortable, cancel the warning and set the new F dial 6 is updated (corresponding to claims 11 and 12).

That is, as shown in FIG. 4, when the hibernation state is released by turning on the main switch 9 or operating the operation section (step S21), the control device 1 sets F
The setting value of the dial 6 is read again (step S2
2) If there is a set value stored in the internal memory of the control device 1 or the nonvolatile memory 2 for adjustment (if in the dial recovery mode), it is compared with the stored set value (step S23). If they match, the conventional processing is performed based on the set values as they are (step S24). In step S23, if they are different, the setting value of the F-dial 6 has changed from the setting state immediately before pausing, and a warning display indicating that the setting state has changed is performed (step S25). Then, it is determined whether the F-dial 6 or the back cover switch 7 has changed, or whether a predetermined time set in advance has elapsed (step S2).
6) If any of the above apply, the process proceeds to step S24, and the operation is the same as the conventional operation.

In step S26, if none of the above is applicable, it is checked whether or not the release switch 5 has been operated (step S27).
Returning to step S25, the above operation is repeated. In step S27, when the release switch 5 is turned on, different processes are performed depending on whether the photographing is prohibited at the time of displaying the warning or when the set value before the rest is restored. If the photographing is prohibited during the warning display, the photographing is prohibited even if the release switch 5 is turned on in step S27. Therefore, the process returns to step S25 to maintain the warning display state and repeat the previous processing (step S28). ). When the set value before the rest is restored, when the release switch 5 is turned on in step S27, step S2 is performed.
In step 8, the normal dialing operation is performed by returning to the F dial value before the pause.

As described above, in a camera of a type in which an aperture value (F value) or other photographing information is set by a dial operation unit such as the F dial 6 having no mechanical stopper or the like, the main switch 9 While the power is off (off state) due to the auto power off by the timer when the power is turned off or when no operation is performed for a predetermined time, the camera may be put in and out of the case, and the camera may come into contact with other objects in your pocket or bag. In the case where the operation unit such as the dial is inadvertently moved, the photographer can perform subsequent photographing without noticing that, thereby preventing photographing from failing.

In the above, as the warning means,
The warning display is performed by blinking a specific cycle of any display segment of the external LCD 3 for displaying a film counter or the like. In the second embodiment of the present invention, as shown in FIG. In addition to the segment 31A for displaying the film counter on the external LCD 3A, a dedicated segment 32 (for example, "F
dial move ") is displayed, and a warning display is performed by turning on or blinking the display. Further, not only the external LCD 3 or 3A, but also
An existing display unit may be used, such as blinking of a display segment of a CD4 or the like, or a display LCD dedicated to setting change warning display may be provided to perform setting change warning display ( (Corresponding to claim 5).

Similarly, the AE arranged beside the finder
(Automatic exposure) L for display such as LED for warning, ranging information or strobe information and LED for self-timer
The ED 11 or the sounding body 10 for warning display or self-timer may be used as warning means, or at least one of an LED and a sounding body dedicated to warning display may be provided (claims 6 to 9). For example, as shown in FIG. 8, a display LED arranged beside a finder window
The LED 11 includes, for example, an LED 11a for AE warning that is turned on or blinked when shooting by automatic exposure is impossible, and an LED 11b for displaying a distance measurement result or a strobe status. For example, in the third embodiment of the present invention, for example,
The AE warning LED 11a shown in FIG. 8 is caused to blink at a frequency different from that at the time of the normal AE warning. In addition, when an EL (electroluminescence) display device for dial illumination is provided in the dial operation unit, a warning display may be performed by blinking the display.

Further, in the fourth embodiment of the present invention,
A dedicated warning display LED 11A is provided at or near the center of the F dial 6A, and the dedicated LED 11A is made to blink. The present invention can be implemented only by changing the software of the control device 1 and the like if an existing display is used, and cost, mechanical and spatial considerations such as providing a stopper mechanism are considered. The present invention can be implemented without making any changes, and can be implemented at low cost and easily. In addition, the present invention can be applied not only to the dial operation unit, but also to an operation unit such as a lever-type operation unit or a slide-type operation unit whose setting content changes depending on the operation position.

[0039]

As described above, according to the present invention, when the power is once turned off and then turned on, unintentional photographing is performed in a state different from the set state when the power is turned off. In addition, it is possible to provide an erroneous photographing prevention device for a camera that can easily set the condition different from the setting state when the power is turned off. In particular, according to the erroneous photographing prevention device for a camera according to claim 1 of the present invention, in a camera capable of photographing a subject and recording a subject image on a recording medium, and controlling and setting operating conditions for photographing the subject, When the operation power supply is turned off by power supply operation means for turning on / off the operation power supply of the camera, a setting state obtained by the setting operation means for setting and changing the operation condition is acquired and stored, and the operation by the power supply operation means is performed. A state collation means for newly acquiring a setting state by the setting operation means at the time of a power-on operation and comparing and collating with the previously stored setting state at the time of the operation power-off is provided. If the settings do not match between when the power is turned off and when the power is subsequently turned on, a warning unit warns of a change in the operation state, so that the power is once turned off and then turned on. In this case, the settings are compared and compared, and if they do not match, a warning is issued. Prevention can be reliably and effectively prevented, and if it is intended, it is easy to set a condition different from the setting state when the power is turned off.

According to the apparatus for preventing erroneous photographing of a camera according to claim 2 of the present invention, while the warning by the warning means is given, the photographing control means for prohibiting the photographing operation of the camera is further provided. In particular, when a change in the setting state is detected, shooting can be suppressed at the same time as an alarm, and failed shooting can be effectively prevented. According to the erroneous photographing prevention device for a camera according to claim 3 of the present invention, when a photographing operation is performed while a warning is issued by the warning unit, the operation power-off operation stored by the state checking unit is performed. According to a configuration further including a photographing control unit that controls a photographing operation of the camera according to information of a setting state by the setting operation unit, particularly when a change in the setting state is detected, regardless of a setting state by a dial or a lever, In this state, it is possible to take a picture in the state described above, and it is possible to effectively prevent failed photographing.

According to the apparatus for preventing erroneous photographing of a camera according to claim 4 of the present invention, the warning means includes a means for displaying a warning by also using a display means provided for displaying other information. In particular, when a change in the setting state is detected, it is possible to reliably warn the photographer of the change in the setting state with a simple and inexpensive configuration. According to the erroneous photographing prevention device for a camera according to claim 5 of the present invention, the warning means includes a dedicated warning display means for performing only a warning display,
In particular, when a change in the setting state is detected,
It is possible to easily and reliably warn the photographer of the change in the setting state. According to the apparatus for preventing erroneous photographing of a camera according to claim 6 of the present invention, the display means can also serve as a light emitting display means provided for displaying other information. With a simple and inexpensive configuration, it is possible to visually warn the photographer of a change in the setting state visually.

According to the apparatus for preventing erroneous photographing of a camera according to claim 7 of the present invention, the warning display means includes a dedicated light-emitting display means. With this configuration, it is possible to easily and reliably warn the photographer of the change in the set state by visually appealing. According to the erroneous photographing prevention device for a camera according to claim 8 of the present invention, the display means can also serve as a sounding means provided for other information display. With a simple and inexpensive configuration, it is possible to reliably warn the photographer of the change in the setting state by hearing the change. According to the erroneous photographing prevention apparatus for a camera according to the ninth aspect of the present invention, the warning display means includes a dedicated sounding means. It is possible to easily and reliably warn the user of the change in the setting state by hearing to the auditory sense.

According to the apparatus for preventing erroneous photographing of a camera according to claim 10 of the present invention, the apparatus further comprises means for terminating the warning operation by the warning means by re-operating the setting change of the operation condition by the setting operation means. With this configuration, it is possible to appropriately release a warning to the photographer when a change in the setting state is detected. According to the erroneous photographing prevention device for a camera according to claim 11 of the present invention, the configuration further comprising means for terminating the warning operation by the warning means by the photographing operation of the camera, particularly detects a change in the setting state. The warning to the photographer at the time can be appropriately canceled. According to the erroneous photographing prevention device for a camera of the present invention, the warning operation by the warning means is at least one of an operation of turning off the operation power supply by the power operation means and an operation of opening and closing the back cover of the camera. In particular, according to the configuration further including the means for terminating the setting, the warning to the photographer when a change in the setting state is detected can be appropriately released.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a configuration of a camera incorporating a camera erroneous image capturing prevention apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a mode switching operation by a mode switch in the camera of FIG. 1;

FIG. 3 is a flowchart for explaining an operation of storing an aperture dial value during a pause in the camera of FIG. 1;

FIG. 4 is a flowchart for explaining an operation of the camera in FIG. 1 when returning from a sleep state.

FIG. 5 is a schematic diagram for explaining a state transition in the camera of FIG. 1;

FIG. 6 is a schematic view for explaining a state change warning display using a film counter display of an external liquid crystal display device in the camera of FIG. 1;

FIG. 7 is a schematic diagram for explaining a state change warning display using a warning display-dedicated segment of an external liquid crystal display device in a camera incorporating a camera erroneous photographing prevention apparatus according to a second embodiment of the present invention. It is.

FIG. 8 is a schematic view for explaining a state change warning display using a light emitting diode for automatic exposure warning in a finder in a camera incorporating a camera erroneous photographing prevention apparatus according to a third embodiment of the present invention. FIG.

FIG. 9 is a view for explaining a state change warning display using a light emitting diode dedicated to a warning display on an aperture value dial portion in a camera incorporating a camera erroneous photographing prevention apparatus according to a fourth embodiment of the present invention. It is a schematic diagram.

[Explanation of symbols]

 Reference Signs List 1 control device 2 memory 3, 3A external liquid crystal display device (external LCD) 4 liquid crystal display device in finder (LCD in finder) 5 release switch 6, 6A aperture dial (F dial) 7 back cover switch 8 mode switch 9 main switch 10 Sounding body 11 Light emitting diode for display (LED for display) 11A LED for warning display only 11a LED for AE (automatic exposure) warning 11b LED for strobe status display 31, 31A Segment for film counter display 32 Segment for warning display only

Claims (12)

[Claims] 1. A camera capable of photographing a subject and recording an image of the subject on a recording medium, and controlling and setting operating conditions related to photographing of the subject. Setting operation means for changing the setting of the operation condition; acquiring and storing a setting state by the setting operation means at the time of turning off the operation power by the power operation means; and turning on the operation power by the power operation means. State collating means for newly acquiring the setting state by the setting operation means at the time of operation and comparing and collating with the previously stored setting state at the time of turning off the operation power supply; and Erroneous photographing of a camera, comprising: a warning unit that warns of a change in the operation state if it is determined that the setting states of the operation state and the subsequent ON state do not match. Stop apparatus. 2. The apparatus according to claim 1, further comprising a photographing control unit for prohibiting a photographing operation of the camera while the warning by the warning unit is being issued. 3. When the photographing operation is performed while a warning is issued by the warning unit, the camera is operated in accordance with information on a setting state by the setting operation unit at the time of the operation power-off operation stored by the state checking unit. 2. The erroneous photographing prevention device for a camera according to claim 1, further comprising photographing control means for controlling the photographing operation. 4. The apparatus according to claim 1, wherein said warning means includes a means for displaying a warning also as a display means provided for displaying another information. An erroneous photographing prevention device for the camera according to the above. 5. The apparatus according to claim 1, wherein the warning unit includes a dedicated warning display unit for performing only a warning display. . 6. The apparatus according to claim 4, wherein the warning display unit includes a light emission display unit. 7. The apparatus according to claim 5, wherein the warning display unit includes a light emission display unit. 8. The apparatus according to claim 4, wherein the warning display unit includes a sound generation unit. 9. The apparatus according to claim 5, wherein the warning display unit includes a sound generation unit. 10. The apparatus according to claim 1, further comprising: means for terminating the warning operation by said warning means by re-operating the setting change of said operating condition by said setting operation means. The erroneous photographing prevention device for a camera according to any one of the above. 11. The apparatus according to claim 1, further comprising: means for terminating a warning operation by said warning means by a photographing operation of said camera.
The erroneous photographing prevention device for a camera according to any one of the above. 12. The camera according to claim 11, further comprising a unit that terminates the warning operation by the warning unit by at least one of an operation of turning off the operation power supply by the power operation unit and an operation of opening and closing the back cover of the camera. An apparatus for preventing erroneous photographing of a camera according to any one of claims 1 to 11.