JP2000258826A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a camera capable of adequately coping with a case that abnormality is detected in a photographing operation and capable of surely protecting an exposed film. SOLUTION: This camera is provided with a barrier (barrier member) covering the front surface of a photographing lens, a detecting means (BRO switch 33, BRC switch 34) detecting the open/close condition of the barrier, a judging means (control circuit 11) judging the abnormality of the photographing operation, a means (control circuit 11) for inhibiting the operation of the camera when the judging means judges the abnormality of the photographing operation, and a means (control circuit 11) for permitting the feeding operation of a film when the detecting means detects that the barrier is in a close condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera having a lens barrier for covering a front surface of a photographic lens, and to an operation control of the camera when an abnormality occurs in a photographic operation.

[0002]

2. Description of the Related Art Conventionally, in a camera for taking a photograph or the like, it is usually determined by the following means whether or not a shutter means is normally operating when a photograph is taken. I have.

That is, a slit or the like is provided at a predetermined position of a shutter blade constituting a part of the shutter means, and a photo interrupter (hereinafter abbreviated as PI) for detecting the slit is provided. When the signal is output, it is determined that the shutter means is operating normally.

On the other hand, if the output from the PI is not detected, it is determined that there is an abnormality in the shutter means, and if such an abnormality is detected, the same abnormal operation is repeatedly executed again. The camera is controlled so as to be set to an inoperative state in which the operation of the camera is prohibited so as not to be performed.

[0005] However, when an abnormality of the camera is detected as described above and the camera is set in an inoperative state, a film feeding operation for performing a winding operation and a rewinding operation of the film loaded in the camera is performed. The feeding mechanism and the like do not operate. Therefore, there may be inconveniences such as the fact that a film that has been loaded and has already been exposed and has already been exposed cannot be taken out of the camera.

Therefore, various means for solving such inconvenience have been proposed, for example, in Japanese Patent Publication No. 2669850. In the camera disclosed in Japanese Patent No. 2669850, when an abnormal operation of the shutter means is detected a plurality of times, the photographing operation of the camera is inhibited in response to the detection, and a predetermined operation such as a film rewinding operation is performed. Is allowed.

Further, a conventional camera having a so-called lens barrier that covers the front surface of a photographing lens is generally put into practical use. The lens barrier is slidably disposed with respect to the exterior member on the front side of the camera, thereby moving the front of the taking lens to an open position during photographing, and carrying or storing the camera. When the camera is not used, the camera can be moved to a position covering the front surface of the taking lens.

[0008]

However, according to the means disclosed in the above-mentioned Japanese Patent No. 2,669,850,
When an abnormal operation of the shutter means is detected, the camera is set to a non-operational state. In this case, the film rewinding operation is allowed.
Therefore, a new problem as described below may occur.

That is, in the case where a failure occurs in a state where the shutter means has opened the exposure opening, if the film rewinding operation is executed, the film enters through the exposure opening during the rewinding operation. The re-exposure is performed on the film which has been photographed (exposed) by the light beam. Some of these shot films may have properly exposed frames, but if these shot films are re-exposed,
There is a problem that all the films become defective in exposure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to appropriately cope with a case where an abnormality is detected in a photographing operation in a camera for photographing. Accordingly, an object of the present invention is to provide a camera capable of reliably protecting at least an already-exposed portion of a film and taking out the film to the outside.

[0011]

To achieve the above object, a camera according to a first aspect of the present invention includes a barrier covering a front surface of a photographing lens, detecting means for detecting the open / closed state of the barrier, and abnormal photographing operation. Determination means for determining, and means for prohibiting the operation of the camera in response to the determination means has determined that the imaging operation is abnormal, and when the detection means detects that the barrier is closed, Means for permitting the film feeding operation.

According to a second aspect of the present invention, there is provided a camera for covering a front surface of a photographing lens, detecting means for detecting the open / closed state of the barrier, determining means for judging an abnormal photographing operation, Means for inhibiting the operation of the camera in response to the determination by the determination means, and means for initiating the film feeding operation in response to the detection means detecting that the barrier has been closed. It is characterized by having.

A camera according to a third aspect of the present invention provides a barrier that covers the front surface of a photographic lens, a driving unit that opens and closes the barrier, and a determination unit that determines an abnormality in a photographic operation.
Control means for controlling the operation of the camera, wherein the control means instructs the drive means to close the barrier in response to the determination of the abnormality in the photographing operation, and thereafter supplies the film. The transmission operation is permitted.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. 1 and 2 are perspective views showing the appearance of a camera according to a first embodiment of the present invention. FIG. 1 shows a non-photographing state in which the barrier member is closed, and FIG. The states at the time of shooting with the shutter open are shown.

The exterior of the camera 1 of this embodiment is composed of a front cover 1a and a rear cover 1b. The two covers 1a and 1b are a main component of the camera 1 such as a circuit board and various mechanisms. Is formed so as to cover a camera body (not shown) formed from the front and rear directions.

A release button 3 and a flash light emitting device 4 are disposed at predetermined positions on the upper surface of the exterior of the camera 1. The release button 3 is an operation member operated when starting photographing, and is a release switch 3 for generating a signal for starting photographing operation.
1 (REL switch; see FIG. 3).

The flash light emitting device 4 irradiates an auxiliary illuminating light beam toward a subject when the shooting environment is a low-luminance environment or when the subject is backlit. It is arranged to be able to protrude and retract with respect to the part. In use, it is configured to protrude upward.

The front side of the camera 1 is arranged along the outer surface of the front cover 1a so as to be slidable between a position covering the front surface of the photographing lens 5a and an opening position. A barrier member 2 is provided.

As shown in FIG. 2, when the barrier member 2 is at the open position, a photographing lens barrel 5 constituted by a photographing lens 5a and the like, an objective lens 6 forming a part of an optical finder section, and The photometric sensor window 7 and the like for guiding a predetermined subject light beam to a photometric sensor (not shown) constituting a part of a photometric circuit 12 (see FIG. 3) provided inside the camera 1 are provided in the camera 1. They are arranged at positions exposed on the front surface. Further, an AF provided inside the camera 1 is provided at a predetermined position on the front side of the camera 1.
An AF distance measuring window 8, which constitutes a part of a distance measuring device as a means, is provided.

In the non-photographing state (non-use state of the camera 1) in which the barrier member 2 is in the closed state (the state of FIG. 1), the photographing lens barrel 5 is in a collapsed state inside the main body of the camera 1. When the barrier member 2 is slid from this state to a predetermined open position shown in FIG. 2, the photographic lens barrel 5 extends toward the front of the camera 1 in conjunction with this movement, and Stop at the position. As a result, the camera 1 enters a photographing preparation state in which a photograph can be taken (FIG. 2).
State).

As described above, the barrier member 2 covers the front surface of the photographing lens barrel 5 as shown in FIG. 1 and closes and protects the front surface of the photographing lens barrel 5, and projects the photographing lens barrel 5 as shown in FIG. The barrier member 2 is slidable between an open position in which the barrier member 2 is held in a predetermined position by, for example, a click mechanism or the like at each position. It has become.

Next, the electrical internal configuration of the camera 1 will be described below with reference to the block diagram of the main part of FIG. The entire camera 1 is controlled by a control circuit 11 which is control means including a microprocessor and the like. The control circuit 11 switches various operations, for example, an exposure operation such as a shutter operation and an aperture operation, a film feeding operation, and a film feeding direction, according to a program stored in advance in a storage means (not shown) such as a ROM. Switching operation of the photographic lens such as clutch switching operation, pop-up strobe device retracting operation, zoom lens zooming operation and focusing lens focusing operation, opening and closing operation of automatic opening and closing lens barrier, etc. Input signals and the like are controlled.

As shown in FIG. 3, the control circuit 11 includes various electric circuits, for example, a shutter drive circuit 14 for driving a plunger of a shutter unit 17 (to be described in detail later) as a shutter means, and a shutter unit. A shutter detection circuit 13 including a photo interrupter (PI) for detecting a state of a sector such as a shutter blade 17 and a film feeding motor of a film feeding unit 18 for performing a predetermined film feeding operation. A motor driving circuit 16 for driving, a film detecting circuit 15 including a photoreflector (PR) for detecting the state of the film feeding unit 18 or the film position, etc., and a photometric circuit for measuring the brightness of the subject and outputting it to the control circuit 11. 1
2 and various switches, for example, a release switch (REL switch) 31 for generating an instruction signal for starting an exposure operation, and forcibly executing a film rewinding operation in the film feeding operation. A rewind switch (RW switch) 32 for generating an instruction signal to be turned on, and a BRO switch 33 as detection means for detecting the open / closed state of the barrier member 2 by changing the on / off state according to the open / close operation of the barrier member 2. And the BRC switch 34 are electrically connected to each other.

FIG. 4 is a timing chart showing the state (position) of the barrier member 2 and the change of the ON / OFF state of the BRO switch 33 and the BRC switch 34.
The barrier member 2 in the camera 1 is slidably disposed between the position covering the front surface of the photographing lens 5a and the position to open as described above. By manually operating the barrier member 2, the user can open and close the front surface of the photographing lens 5a.

In this case, the barrier member 2 is operated by the user, and the barrier member 2 is moved from the state in which the barrier member 2 is in the fully closed position (the state in FIG. 1; see reference numeral A in FIG. 4) to the open state in which the barrier member 2 is in the fully open position. When the state moves to the state shown in FIG. 2 (see reference numeral B in FIG. 4), the BRO switch 33 generates an ON signal (see reference numeral C in FIG. 4). This output signal is transmitted to the control circuit 11. Thus, the open state of the barrier member 2 is detected. Then, in response to this, the control circuit 11
Designates initialization of the position of the photographing lens 5a inside the photographing lens barrel 5, execution of an engraving preparation operation such as driving of an LCD display device (not shown), and the like.

When the barrier member 2 is released from the fully open position (reference B in FIG. 4) and is moved in a direction to close the barrier member 2, the BRO switch 33 switches to the off state. (C in FIG. 4). In response to this, the control circuit 11 detects that the barrier member 2 has been moved from the fully open position and has started to move to the closed state. Then, the control circuit 11 instructs execution of the collapsing operation of the taking lens barrel 5, the turning off of the LCD display device, and the like.

On the other hand, when the barrier member 2 moves to the fully closed position (reference A in FIG. 4), an ON signal is generated from the BRC switch 34, and it is detected that the barrier member 2 has been completely closed (FIG. 4). D). The state of the camera 1 at this time is a state during non-shooting (see FIG. 1).

The film feeding unit 18 is a mechanism for feeding a film from a film cartridge loaded at a predetermined position inside the camera 1, and is constituted by various components such as a driving motor. Then, a predetermined film feeding operation such as a film winding operation and a film rewinding operation is executed.

The shutter unit 17 is a mechanism for adjusting the amount of exposure of the film on the image forming surface, and includes various components such as a shutter detecting circuit 13 including a shutter, a solenoid, a plunger, and a photo interrupter (PI). And performs a predetermined exposure operation.

Here, the configuration of the shutter unit 17 in the camera 1 will be described in more detail. 5 and 6 are views showing only the shutter unit in the camera of the present embodiment, in which FIG. 5 shows a case where the shutter is in a closed state, and FIG. 6 shows a case where the shutter is in an open state. Things.

The shutter unit 1 of the camera 1
7 is a solenoid 27, plunger 27a, sector 2
1.22, sector lever 25 and shutter detection circuit 1
3 is constituted by various components such as a PI (photo interrupter) 29 which is an abnormality detecting means constituting a part of the camera 3, and these various components are fixed to the camera body inside the camera 1. Are arranged at predetermined positions on a shutter base plate (not shown). The shutter base plate has an opening 2 for exposure.
0 is provided, and the center of the opening 20 is set so as to substantially coincide with the optical axis of the photographing lens 5a.

In the vicinity of the opening 20 of the shutter base plate, sector pins 23 and 24 are erected on the shutter base plate. Holes provided at the bases of the sectors 21 and 22 made of two thin plate members having a substantially half-moon shape are fitted into the sector pins 23 and 24, respectively. Thus, the sectors 21 and 22 are rotatably supported with respect to the shutter base plate between a closed position where the opening 20 is closed and an open position where the opening 20 is exposed.

In the vicinity of the sectors 21 and 22, approximately L
A letter-shaped sector lever 25 is rotatably supported on the shutter base plate. At the tip of one arm of the sector lever 25, a pin 25b is implanted.
A cam hole provided at the base of each of the sectors 21 and 22 is engaged with 5b.

A pin 25a is also implanted at the tip of the other arm of the sector lever 25. The pin 25a
The solenoid 27 is disposed so as to abut the tip end surface of the plunger 27a.

An opening spring 26 is suspended between the other arm of the sector lever 25 and a fixed portion (not shown) of the shutter base plate. The urging force of the opening spring 26 is shown in FIGS.
In the direction of arrow X1 shown in FIG.
In FIG. 6, the rotation direction is set in the counterclockwise direction. Accordingly, the sectors 21 and 22 are urged in a direction to open the opening 20 by the urging force of the opening spring 26.

The plunger 27a is provided with a separation spring 28 which urges the plunger 27a in a direction for separating the plunger 27a, that is, in a direction indicated by an arrow X2 shown in FIGS. Zu) is suspended between. As described above, the tip surface of the plunger 27a
The pin 25a of the other arm of the sector lever 25 is in contact. Therefore, the rotation of the sector lever 25 in the counterclockwise direction by the urging force of the opening spring 26 is performed by the plunger 27 urged in the arrow X2 direction by the urging force of the separation spring 28.
a.

As a result, when the plunger 27a is driven and controlled by the control circuit 11 via the shutter drive circuit 14 to perform a suction operation or an opening operation, the sector lever 25 is rotated in a predetermined direction following the operation. . Along with this, the openings 20 are opened and closed by also rotating the sectors 21 and 22 in a predetermined direction.

On the other hand, the PI 29 is located at a predetermined position on the shutter base plate, that is, as shown in FIGS.
The shutter 2 is integrally fixed to the shutter base plate at a position where rotation of the shutter 2 can be detected. PI in the camera 1 of the present embodiment
29 indicates that when the opening 20 is closed by the sectors 21 and 22 as shown in FIG. 5 (the state of FIG. 5), the detection light beam is transmitted by the leading end of one of the sectors 21 and 22. The position where the light is shielded and the sector 21
Immediately before the opening 20 starts to be opened by 22, it is arranged at a predetermined position where the light blocking state of the detection light beam is released.

The PI 29 generates an ON signal when the light blocking state of the detection light beam is released and the light beam is transmitted therethrough. This allows the camera 1
In, the ON signal is generated just before the opening 20 starts to open. This ON signal is transmitted to the control circuit 11,
The control circuit 11 receives this as a trigger signal indicating that the exposure operation is to be started, and outputs various instructions for executing predetermined processing for the exposure operation in accordance with the trigger signal.

FIG. 7 shows the state of the shutter opening 20 and PI 29 when the shutter unit 17 (sectors 21 and 22) is driven by energizing the solenoid 27.
6 is a timing chart showing the relationship between the output signals of FIG.

The operation of the shutter unit 17 and the relationship between the state of the shutter opening 20 and the output signal of the PI 29 will be described below with reference to FIGS.

First, in the state shown in FIG. 5, the energization of the solenoid 27 in the shutter unit 17 is started (turned on; see symbol E in FIG. 7). This causes the plunger 27a to move in the suction direction (the direction of the arrow X1 in FIG. 5) against the urging force of the separation spring 28. Then, the sector lever 25 is pressed by the urging force of the opening spring 26.
Rotates counterclockwise in FIG. As a result, the pin 25b of one arm of the sector lever 25 moves,
-Each 22 rotates in a predetermined direction. As a result, the opening 20 that has been shielded from light by the sectors 21 and 22.
Will shift to the open state.

In this case, just before the opening 20 starts to open, the leading end of the sector 21 releases the light blocking state of the PI 29, and the light beam for detection of the PI 29 changes to the transmitting state. Accordingly, the output signal level of the PI 29 changes from a high (High) state indicating light shielding to a low (Lo) state indicating transmission (reference F in FIG. 7). Then, the light blocking state of the opening 20 by the sectors 21 and 22 is gradually released from the time point (open position) indicated by the reference sign G in FIG. 7, and the opening 20 is completely opened at the open position indicated by the reference sign H in FIG. The state at this time is the state shown in FIG.

Thereafter, when the energization of the solenoid 27 is released (turned off; see J in FIG. 7), the plunger 27a is moved in the direction of arrow X2 in FIG. . Along with this, the sector lever 25 rotates clockwise in FIG. 6, and the sectors 21 and 22 gradually shift to the closed state (see reference numeral K in FIG. 7).

When the leading end of the sector 21 shields the PI 29 from light (the state shown in FIG. 5), the output signal level of the PI 29 changes from the low state to the high state (reference L in FIG. 7). Thus, the opening 20 is formed by the sectors 21 and 22.
Is detected to be completely closed. The operation when the shutter unit 17 is operating normally is as described above.

The shutter unit 17 operates as described above. In this case, for example, when the shutter unit 17 performs an abnormal operation for some reason, it is considered that an abnormality occurs in the output signal of the PI 29. . Therefore, by monitoring the signal of PI 29 during the operation of the shutter unit 17,
An abnormal operation of the shutter unit 17 can be detected.

That is, when the shutter unit 17 becomes abnormal for some reason and the sectors 21 and 22 perform abnormal operations, the output signal from the PI 29 becomes abnormal. The following three cases can be considered as abnormalities in this case. That is, first, when the output signal of the PI 29 is in a low state before energizing the solenoid 27, secondly, after energizing the solenoid 27,
PI 29 within a predetermined time (see reference numeral S1 in FIG. 7).
Third, when the output signal level does not change from the high state to the low state, the power supply to the solenoid 27 is released within a predetermined time (see reference numeral S2 shown in FIG. 7) after the power supply to the solenoid 27 is released.
And the case where the output signal level of I29 does not return to the high state.

In the first case described above, it is conceivable that the shutter unit 17 has failed while the sectors 21 and 22 are open. Therefore, at this time, it is considered that the exposure surface of the film disposed at the position facing the opening 20 is in an exposed state.

Next, in the above-described second case, the opening operation when the sectors 21 and 22 of the shutter unit 17 are in the open state is caused by an abnormality, and thus the normal exposure operation is not performed. It is considered to be.

In the third case described above, the shutter closing operation is abnormal and not only the proper exposure was not performed, but also the shutter remains open and the exposure surface of the film is exposed. It is considered that the subject light beam is continuously being irradiated.

Next, the means for determining an abnormality of the shutter unit 17 will be described below. First, the basic operation of the camera of this embodiment when taking a picture will be described below with reference to the flowchart of FIG.

When the barrier member 2 of the camera 1 is opened and the main power switch linked to the barrier member 2 is turned on, the camera 1 is in a shooting preparation state.

In this state, when the user of the camera 1 presses, for example, the release button 3 which is an operation member interlocked with the REL switch 31, the REL switch 31 is operated.
Thereafter, an instruction signal (release signal) for starting the exposure operation is generated and transmitted to the control circuit 11. In response to this, the control circuit 11 starts executing a predetermined photographing operation program shown in FIG.

First, in step S1, a photometric operation is performed. In this photometric operation, the luminance of the subject is measured based on the luminous flux of the subject received by the photometric circuit 12, and the shutter drive time for performing proper exposure is calculated based on the luminance of the subject.

Next, in step S2, the distance from the camera 1 to a desired subject is measured by using AF means (not particularly shown) including the AF distance measuring window 8 shown in FIG. The amount of extension of the photographing lens 5a or the like for obtaining the in-focus state is calculated.

Subsequently, in step S3, the photographing lens 5a is moved to a predetermined position based on the AF result calculated in step S2 described above (extending operation).

Next, in step S4, after executing the sequence of the exposure operation (details will be described later; see FIG. 9), the process proceeds to step S5, where the control circuit 11 determines the detected PI 29 The above-described exposure operation in step S4 (FIG. 9)
Is completed normally). That is, the control circuit 11 serves as a determination unit for determining whether the exposure operation (imaging operation) is abnormal.

In this case, if it is determined that the exposure operation has been abnormally terminated, the flow shifts to the non-operation processing sequence of step S10. That is, the control circuit 11
When the abnormality of the exposure operation (photographing operation) is confirmed, the device acts as means for inhibiting a predetermined operation of the camera 1 in response to the abnormality (details will be described later; see FIG. 10). If it is determined that the exposure operation has been completed normally, the process proceeds to the next step S6.

In step S6, after executing the lens retracting operation for moving the taking lens 5a extended in step S3 to a predetermined position, the process proceeds to the next step S7. The circuit 11 drives and controls the film feeding unit 18 via the motor driving circuit 16 to execute a film feeding operation for feeding the film by one frame so that the next frame to be exposed is at a predetermined position. (Film winding operation).

Next, in step S8, the control circuit 11 determines whether or not the end of the film is detected based on the output of the film detection circuit 15, that is, in step S4, the exposure operation performed this time is the exposure of the last frame of the film. It is determined whether or not the operation was performed. Here, if it is determined that it is the film end, the next step S9
In this step S9, the control circuit 1
1 controls the driving of the film feeding unit 18 via the motor driving circuit 16 to perform a film feeding operation (film rewinding operation) for rewinding the photographed film into the film cartridge, and then a series of operations. To end (end). On the other hand, if it is confirmed in step S8 that the film is not the film end, the process proceeds to step S9.
Is not executed, and the series of operations ends as it is.
Then, a standby state for the next photographing is set.

Next, the details of the sequence of the exposure operation in this camera will be described below with reference to the flowchart of FIG. This sequence of the exposure operation is a subroutine of step S4 in FIG. 8 described above.

First, in step S 11, the control circuit 11 checks the output signal of the PI 29 via the shutter detection circuit 13. Since this state is a state before the shutter unit 17 is driven, the output signal level from the PI 29 needs to be in a high state in order to perform a normal operation.

That is, in this case, when it is confirmed that the output signal level of the PI 29 is in the high state, the process proceeds to the step S13. When it is confirmed that the output signal level of the PI 29 is in the low state, the shutter unit 17 (sector 2) has already been driven before the shutter unit 17 is driven for the current exposure operation.
1.22) is in the open state. Therefore, it is determined that an abnormality has already occurred in the shutter unit 17, and the subsequent exposure operation is prohibited. Then, the process proceeds to step S12. In step S12, it is determined that an abnormality has occurred in the shutter closing operation. After the history information is stored in a predetermined storage means (not shown), a series of exposure operations is ended (END).

When the process proceeds to step S13 according to the determination in step S11, the process proceeds to step S13.
In, the control circuit 11 starts energizing the solenoid 27 via the shutter drive circuit 14. As a result, the plunger 27a starts sucking, and the sector 21.2.
Driving for opening the second 2 is started.

At the same time as the processing of step S13, that is, the start of energization of the solenoid 27, at step S14, the control circuit 11 starts the timekeeping operation of its own abnormality determination timer (not shown).

Next, in step S15, the control circuit 11 monitors the state of the output signal from the PI 29, and
If the output signal level of I29 is in the low state, that is, if it is detected that the signal has changed from the high state to the low state, the process proceeds to the next step S19, and PI2
If it is detected that the output signal of No. 9 remains unchanged in the high state, the process proceeds to step S16.

In step S16, the state of the abnormality determination timer started in step S14 is checked, and the processing in steps S15 to S16 is repeated until a predetermined time elapses.

If it is determined in step S16 that the predetermined time has elapsed, it is determined that the sectors 21 and 22 are not operating, and the processing in the next step S17 is performed. Proceed to.

In step S17, execution of the subsequent exposure operation is prohibited, and history information indicating that an abnormality has occurred in the shutter opening operation is stored in a predetermined storage means (not shown). Proceed to processing. In step S18, after the energization of the solenoid 27 is released, a series of operations ends (end).

On the other hand, in step S15, P
When the change of the output signal of I29 to the low state is detected and it is confirmed that the sector 21 has started to operate normally, and the process proceeds to step S19, in this process of step S19, the control circuit 11 The timer operation (not shown) for the second reproduction of the exposure time is started.

Next, in step S20, the control circuit 11 checks whether or not the predetermined exposure time has expired. Here, when the predetermined exposure time measured by the timer for time reproduction has ended, the control circuit 11 proceeds to the next step. Proceed to step S21.

In step S21, the control circuit 11
Releases the power supply to the solenoid 27. As a result, a closing operation in which the sectors 21 and 22 close the opening 20 is started.

At the same time, in step S22, the control circuit 11 starts the timekeeping operation of its own abnormality determination timer (not shown), and proceeds to the next step S23.

Next, in step S23, the control circuit 11 monitors the state of the output signal from the PI 29, and
If it is detected that the output signal level of I29 has changed to the high state, the process proceeds to the next step S26. If it is detected that the output signal level of the PI29 does not change while it is in the low state, the process proceeds to step S26. The process proceeds to S24.

In step S24, it is checked whether or not the time measured by the abnormality determination timer that has started the time counting operation in step S22 has passed a predetermined time, and the predetermined time has elapsed. Step S2 until
The processes from 3 to S24 are repeated.

If it is determined in step S24 that the predetermined time has elapsed, it is determined that the sectors 21 and 22 are not in the closed state, and the process proceeds to step S25. Proceed to processing. Thereafter, in step S25, history information indicating that an abnormality has occurred in the shutter closing operation is stored in a predetermined storage unit (not shown), and a series of operations is ended (END).

In step S23, the PI 29
When the output signal level has changed to the high state, and the normal end of the exposure operation is confirmed, the process proceeds to the next step S26. In this step S26, the control circuit 11 After initializing the abnormality history information in the storage means (not shown), a series of operations is ended (END).

Next, the sequence of the non-operation processing in the camera will be described in detail with reference to the flowchart of FIG. This sequence of the non-operation processing is a subroutine of step S10 in FIG. 8 described above.

As described above, as a result of the determination in step S4 in FIG. 8, when it is determined that the exposure operation has been abnormally terminated, the control circuit 11 starts a sequence of non-operation processing.

When the sequence of the non-operation processing is started, first, in step S31, the control circuit 11 shifts to a power saving mode operating in a state where power consumption is suppressed, and enters a so-called standby state. When in the standby state in the power saving mode, the control circuit 1
1 stops control other than monitoring the state change of the output signal of each switch and the like, and when an interrupt signal or the like from each switch or the like occurs, performs a predetermined operation according to the command signal. It is designed to start.

That is, in step S32, the control circuit 11 confirms whether or not the release button 3 linked to the REL switch 31 has been operated to output a predetermined start command. Here, when it is determined that the output signal of the REL switch 31 as the activation factor has occurred (the state has changed from the off state to the on state), the process returns to the above-described step S31 so that the state is maintained. , And the subsequent processing is repeated.

The REL switch 3 as a starting factor
If the output signal from No. 1 is not detected (the output signal remains off), the process proceeds to the next step S33, and in this step S33, the control circuit 11 checks whether or not the BRO switch 33 has changed. Perform Here, if it is confirmed that the state of the BRO switch 33 has not changed, the process proceeds to the next step S35.

On the other hand, in step S33, when the control circuit 11 detects the change of the BRO switch 33 from the ON state to the OFF state, the operation is performed by the user so that the barrier member 2 is closed. Judge
The process proceeds to step S34.

Then, in step S34, the control circuit 11 executes the lens retracting operation for retracting the photographing lens barrel 5, and then returns to the above-described step S31 to shift to the power saving mode.

On the other hand, in step S33, B
When the state change of the RO switch 33 is not detected,
In step S35, the state of the BRC switch 34 is checked. Here, when it is confirmed that the state of the BRC switch 34 has not changed, the process proceeds to the next step S37.

Next, in step S37, the control circuit 11 checks the state of the RW switch 32. Here, when the state of the RW switch 32 has not changed, the process returns to the above-described step S31 and shifts to the power saving mode.

In step S37, a command signal for requesting the film rewinding operation is generated by operating the intermediate rewind button (not shown) interlocked with the RW switch 32 (from the OFF state to the ON state). When the control circuit 11 confirms that the film rewinding operation has not been immediately performed, the control proceeds to the next step S
Proceed to step 38.

At step S38, the control circuit 11
Generates a command signal for the RW switch 32 by a user performing a predetermined operation (operation of a rewind button in the middle), and stores history information indicating that a request for a film rewind operation has been made in a predetermined storage means (FIG. After that, the process proceeds to the next step S39.

In step S39, control circuit 11
Confirms whether or not there is an abnormality in the shutter closing operation by searching the contents relating to the abnormality history information stored in the storage means. Here, when there is history information on the abnormality of the shutter closing operation, the sector 21.2.
2, the opening 20 may be in an open state.

Therefore, in this case, the process proceeds to the next step S40, and in this step S40, B
By checking the state of the RC switch 34, it is checked whether the barrier member 2 is in the closed state. If the BRC switch 32 is off, the barrier member 2
Is determined not to be completely closed. In this state, it is estimated that there is an abnormality in the closing operation of the sectors 21 and 22 as described above (refer to step S39). Will be re-exposed.

Therefore, in step S40,
If it is determined that the barrier member 2 is not completely closed, that is, if the state of the BRC switch 32 is off, the process returns to the above-described step S31, shifts to the power saving mode, and repeats the subsequent processes. I have to.

On the other hand, in step S40, when it is confirmed that the barrier member 2 is completely closed and the state of the BRC switch 32 is on, the process proceeds to the next step S41. In S41, a predetermined film rewinding operation is performed.

If it is confirmed in step S39 that there is no history information relating to the abnormality of the shutter closing operation, the state of the opening 20 is changed to the closed state where the light is shielded by the sectors 21 and 22. It can be estimated that there is. Therefore, in this case, the process proceeds to step S41 without confirming the state of the BRC switch 32, and a predetermined film rewinding operation is executed in step S41.

When the film rewinding operation in step S41 is completed, the process proceeds to the next step S42. In this step S42, the history information relating to the rewinding request is initialized, and then the process returns to the above-described step S31. To the power saving mode.

On the other hand, when the control circuit 11 detects a change from the OFF state to the ON state of the BRC switch 34 in the above-described step S35, it is determined that the barrier member 2 has been completely closed. Proceed to step S36.

Then, in step S36, the control circuit 11 checks whether or not a request for the film rewinding operation has been issued by searching the contents relating to the abnormality history information stored in the storage means. Here, when it is confirmed that the signal of the request command of the film rewinding operation has not been generated, the process returns to the above-described step S31 and shifts to the power saving mode.

If it is determined in step S36 that a command signal for requesting the film rewinding operation is found, the flow advances to step S41 to execute step S41.
, A predetermined film rewinding operation is performed.

That is, the process of confirming the occurrence of the film rewind request in step S36 is performed in consideration of the following case. That is, this is a case where the camera 1 is in a state where the opening 20 is open due to a failure of the sectors 21 and 22 and the barrier member 2 is in an open state. Are detected, and steps S38 to S38 are detected.
39, and in step S40, the BRC switch 34
Is determined to be in the off state, step S3
Return to 1. Then, if it is detected in step S35 that the BRC switch 34 has changed to the ON state after a series of processes to be performed again, the processes in and after step S36 are executed.

Therefore, after confirming the state of the BRC switch 34 (step S37), if the RW switch 32 is operated and the BRC switch 34 remains off after that, the data stored in the step S38 is stored. While the history information relating to the rewind request is left, step S
It will return to the process of 31.

In this state, the state of the BRC switch 34 is checked again in step S35, and it is confirmed that the switch 34 is on and the barrier member 2 is completely closed. Then, the film rewinding operation based on the history information on the rewinding request is executed.

In this state, the opening 20 is open due to the failure of the sectors 21 and 22.
Thus, the exposure surface of the film is shielded from light. Therefore, there is no problem if the film rewinding operation is executed as required since the light beam from the outside does not adversely affect the film.

Therefore, in the process of step S36, BR
After confirming that the C switch 34 is in the ON state, the request for the film rewinding operation is immediately permitted.

The sequence of the non-operation process is maintained as long as a failure or the like is not eliminated by performing a repair or the like.

As described above, according to the camera of the first embodiment, when the sectors 21 and 22 constituting a part of the shutter unit 17 become inoperable due to a failure or the like, the barrier becomes inoperable. The film rewinding operation is permitted only when the member 2 is at the fully closed position where the member 2 is completely closed. Accordingly, this can protect at least the photographed portion of the film and easily remove the photographed film surface of the film from the inside of the camera without exposing the film surface to external light.

In the camera according to the first embodiment, when the shutter closing operation is abnormal during the non-operation processing sequence, the RW switch 3 is turned off.
When the request command signal of the rewinding operation by No. 2 is generated, BR
After the C switch 34 is turned on, that is, the barrier member 2 is completely closed, the film is rewound halfway. That is, the intermediate rewinding operation is not performed unless the barrier member 2 is completely closed.

In consideration of this point, in the following second embodiment, several steps of processing are added to the sequence of the non-operation processing in the camera of the first embodiment (FIG. 10). Thus, the chance of starting the film rewinding operation in the case of occurrence of a shutter closing abnormality is increased.

That is, in this embodiment, when a request for the film rewind operation is made while the shutter closing operation is abnormal, before the film rewind operation is executed, Then, an operation for driving the shutter unit to return the sectors 21 and 22 to the closed state is tried.

For this purpose, the sequence of the non-operation processing in the present embodiment is a two-step sequence between the processing in step S39 and the processing in step S40 in the sequence of the non-operation processing in the first embodiment (FIG. 10). This is a sequence in which three processes (steps S46 and S47; see FIG. 11) are added. Other processes are the same as those in the first embodiment.

Here, the sequence of the non-operation processing according to the present embodiment will be described below only for the parts different from the above-described first embodiment. In the sequence of the non-operation processing according to the present embodiment, similarly to the first embodiment, in step S39, the control circuit 11 searches the contents related to the abnormality history information stored in the storage unit and performs the shutter closing operation. Check whether there is any abnormal history information.
Here, if there is history information on the abnormality of the shutter closing operation, the opening 20 is determined by the sectors 21 and 22.
May be open.

Therefore, in this case, the process proceeds to the next step S46, in which the control circuit 11 performs a predetermined shutter return operation, that is, the sectors 21 and 22 of the shutter unit 17 via the shutter drive circuit 14. Is performed (details will be described later; see FIG. 12).

Next, in step S47, the control circuit 11 controls the shutter detection circuit 13 to check the state of the sectors 21 and 22 of the shutter unit 17, and closes the shutter by the processing in step S46 described above, that is, the shutter return operation. It is determined whether or not the operation abnormality has been resolved. Here, as a result of the detection by the shutter detection circuit 13, when it is determined that the abnormality of the shutter closing operation has been eliminated, the opening 2 is determined by the sectors 21 and 22.
Since it is estimated that 0 has been returned to the closed state, the process proceeds to step S41, where the film rewinding operation is performed.

On the other hand, in step S47, when it is confirmed that the shutter closing operation is not eliminated by the shutter return operation in step S46, the process proceeds to the next step S40. Check the state of the BRC switch 34,
It is checked whether the barrier member 2 is in the closed state. Subsequent processing is the same as the above-described non-operation processing sequence of the first embodiment.

Next, the sequence of the above-described shutter return operation will be described with reference to the flowchart of FIG. As described above, when it is determined in step S39 of FIG. 11 that an abnormality in the shutter closing operation has occurred, the process proceeds to step S46, that is, the subroutine of the shutter returning operation. FIG. 12 shows the shutter return operation subroutine in detail.

When the operation shifts to the shutter return operation, first, in step S51, the control circuit 11 controls the shutter detection circuit 13 to check the state of the output signal of the PI 29. Here, since the shutter closing operation is abnormal, the output signal level of the PI 29 should be in the low state. Then, when the output signal level is confirmed to be low, the process proceeds to the next step S53.

On the other hand, in step S51, PI 29
If it is detected that the output signal level has changed to the high state, it means that the abnormality in the shutter closing operation has already been eliminated before performing the shutter return operation for some reason. There is no need to execute the subsequent shutter return operation. Therefore, the process proceeds to the process of step S52, and in this step S52, after the abnormality history information of the shutter closing operation is initialized, a series of operations is ended (END). Then, the process proceeds to step S47 in FIG.

Next, in step S53, the control circuit 11 controls the shutter drive circuit 14 to start energization of the solenoid 27 to attract the plunger 27a. As a result, the sectors 21 and 22 that are open due to a failure or the like are forcibly re-driven.

At the same time, in step S54,
The control circuit 11 starts counting time of a timer provided therein. This means that the shutter unit 17 is forcibly driven by the processing in step S53 (solenoid 2).
This is performed in order to measure a predetermined time for energizing the power supply 7. The predetermined time set here is desirably a time sufficient to drive the sectors 21 and 22 to open the opening 20, for example, a relatively long time of about 100 ms.

Subsequently, in step S55, the control circuit 11 checks the time measured by its own timer, and determines whether or not a predetermined time has elapsed. Then, after waiting for the elapse of the predetermined time, the process proceeds to the next step S56.

In step S56, the control circuit 11 stops the forcible shutter closing operation by releasing the power supply to the solenoid 27. At the same time, in step S57, the control circuit 11 starts counting of a timer for detecting an abnormality of the control circuit 11 itself.

Then, in step S58, the control circuit 11 checks the state of the output signal of the PI 29. Here, when it is confirmed that the output signal level is in the high state, it is estimated that the cause of the abnormality in the shutter closing operation has been eliminated. Therefore, the process proceeds to the next step S60. After the abnormal history information of the closing operation is initialized in this step S60, a series of shutter return operations is completed, and then the process proceeds to step S47 in FIG.

In step S58, PI 29
If the output signal level is low, it is considered that the cause of the abnormality in the shutter closing operation has not been eliminated yet. Therefore, in this case, the process proceeds to step S59, and in this step S59, it is confirmed whether or not the time measurement by the abnormality detection timer started in step S57 has been completed. Here, when it is confirmed that the predetermined time has elapsed, it is determined that the shutter cannot be returned even by the forcible shutter closing operation, and the sequence of the series of shutter returning operations ends. Then, step S in FIG.
It proceeds to the process of 47.

If the predetermined time has not elapsed,
Returning to the process of step S58, the process of checking the output signal level of the PI 29 is repeated until a predetermined time has elapsed in step S59.

As described above, according to the second embodiment, when a request for the film rewinding operation is made while the shutter closing operation is abnormal, the film rewinding operation is performed. Before executing the operation, the shutter unit 17 is driven to perform an operation of trying to forcibly return the sectors 21 and 22 to the closed state, so that the film can be formed without closing the barrier member 2. Opportunities to execute the midway rewind operation increase. Therefore, appropriate measures can be taken in the event of a failure or the like, so that the exposed portion of the film can be reliably protected, and the operability in the event of a failure or the like can be improved.

In the first and second embodiments, the BRC switch 34 for generating a predetermined signal according to the open / close state of the barrier member 2 is provided, and the state of the BRC switch 34 is monitored. Barrier member 2
It is configured to detect the open / closed state of the device. However, the detection means for detecting the state of the barrier member 2 is not limited to this, and the same function can be provided by monitoring the output of the photometry circuit 12 instead of the BRC switch 34, for example.

That is, as described above, the photometric sensor window 7 is provided at a predetermined position on the front surface of the camera 1 (see FIG. 2). When the barrier member 2 is at the open position shown in FIG.
When the barrier member 2 is closed while being exposed to the front surface, the front surface is covered and arranged at a position where it is shielded from the outside.

Therefore, when the barrier member 2 is completely closed, the photometric circuit 12 is opened from the photometric sensor window 7.
The subject light flux incident on the photometric sensor is completely blocked. In this case, the photometry by the photometry circuit 12 becomes impossible, and as the photometry result, an output to that effect, for example, a photometry signal indicating darkness is output.

Therefore, the sequence of the non-operation processing in the camera of the first embodiment (FIG. 10) or the sequence of the non-operation processing in the camera of the second embodiment (FIG. 1)
An embodiment in which only the processes of steps S35 and S40 of 1) are changed as follows is conceivable.

That is, step S3 shown in FIGS.
5 and S40, the control circuit 11
The state of the switch 34 is checked, but in the third embodiment described below, instead of this, the control circuit 11 controls the photometry circuit 12 to execute a photometry operation, and the photometry result is obtained. Member 2 based on the output signal of
Is determined whether or not is in the closed state.

Here, if the photometric sensor window 7 is completely covered by the barrier member 2, the output signal of the photometric result should be dark. Also,
Even if the barrier member 2 is not completely closed, if the output signal of the photometry result is a signal indicating darkness, it may be considered that this is substantially equivalent to the case where the barrier member 2 is completely closed. . Therefore, in this case, even if the film rewinding operation is performed in a state where the opening 20 is opened due to the abnormality of the shutter closing operation, unnecessary re-exposure is performed on the exposed film. Is eliminated.

According to the third embodiment in which such a process is performed, as a means for detecting the state of the barrier member 2, a photometric circuit provided for use in a normal photographing operation is provided. Since the camera 12 is used, similar to the cameras shown in the first and second embodiments described above, the film can be used without adding a special component such as a BRC switch as a barrier state detecting means. The exposed portion can be reliably protected and safely taken out of the camera.

Further, since it is not necessary to newly provide a barrier state detecting means, it is possible to prevent the camera from being enlarged, and to safely and easily perform the film rewinding operation in the event of an abnormal shutter operation without increasing the manufacturing cost. Can work.

By the way, the barrier member in the camera of each of the above-described embodiments has been described as an example in which the opening and closing operation is manually performed by a user arbitrarily. However, in some conventional cameras having a barrier member, the opening / closing operation is performed by using a driving means such as a motor.

Therefore, in a fourth embodiment described below, in a camera having such a barrier member, the film rewinding operation can be reliably executed even when the shutter closing operation is abnormal. The means for doing so will be exemplified.

FIG. 13 is a main block diagram showing the electrical internal configuration of the camera according to the fourth embodiment of the present invention. The configuration of the present embodiment is basically the same as the configuration of the first embodiment. Therefore, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. Only different components will be described below.

The opening / closing operation of the lens barrier 37 in the camera of this embodiment is performed by using a barrier drive circuit 36 which is a drive unit including a motor and the like.

In the present camera, the BRO switch 33 and the BRC switch 34 (see FIG. 3) provided as means for detecting the barrier state in the first embodiment are removed. Then, the state of the lens barrier 37 is detected by using a power (PW) switch 35 linked to an operation member (not shown) for switching the ON / OFF state of the main power supply.

That is, when the user operates a predetermined operation member to turn on the PW switch 35, the PW switch 35 is turned on.
The switch 35 generates a command signal for turning on the main power supply. In response to this, the power supply to the electric circuit of the entire camera is started, and the control circuit 11 is also activated. At the same time, the control circuit 11 controls the barrier drive circuit 36 to perform driving for opening the lens barrier 37. Further, at this time, the control circuit 11 performs control for instructing execution of a shooting preparation operation such as initialization of a shooting lens position and driving of an LCD display device.

On the other hand, when the user operates a predetermined operation member to switch off the PW switch 35 while the main power supply of the camera is on, the main power supply is turned off from the PW switch 35. Is generated. When the control circuit 11 detects this off signal, the control circuit 1
Numeral 1 executes drive control for closing the lens barrier 37 via the barrier drive circuit 36, and instructs execution of collapsing operation of the taking lens, turning off of the LCD display device, and the like. For other configurations, the first
This is the same as the camera of the embodiment.

The basic operation of the camera according to the present embodiment thus configured is the same as that of the above-described first embodiment (see FIGS. 8 and 9), and only the sequence of the non-operation processing is slightly different. different. Therefore, a detailed description of the same operation as in the first embodiment will be omitted here, and only the sequence of the non-operation processing in the camera of the present embodiment will be described below with reference to the flowchart of FIG.

Also in the camera of this embodiment, when it is determined that the predetermined exposure operation has been abnormally terminated by the predetermined means during the execution of the exposure operation, the sequence shifts to this non-operation processing sequence (FIG. 8). Steps S4, S5
S10 and FIG. 9).

When the sequence shifts to the non-operation processing sequence, first, in step S61, the control circuit 11 shifts to the power saving mode and enters the standby state. At this time, the control circuit 11 monitors the state change of the output signal of each switch and the like.

At the step S62, the control circuit 11
Is the release button 3 linked to the REL switch 31
(See FIG. 1 and FIG. 2) is operated to confirm whether a predetermined start command has been output. Here, when the output signal of the REL switch 31 is detected, the state is maintained as it is, and the process returns to the step S61.

When the output signal from the REL switch 31 is not detected, the process proceeds to the next step S63, in which the control circuit 11
The state of the PW switch 35 is confirmed. Where PW
If it is confirmed that no change has occurred in the switch 35, the process proceeds to the next step S65.

On the other hand, in step S63, when the control circuit 11 detects a change from the on state to the off state of the PW switch 35, the main power is turned off by the user's operation, and the lens barrier 37 is closed. Is determined to have been performed, and the process proceeds to step S64.

Then, in step S64, the control circuit 11 executes a lens retracting operation for retracting the photographing lens barrel 5, and then drives and controls the lens barrier 37 via the barrier driving circuit 36 to close it. After the barrier closing operation is performed, the process returns to the above-described step S61 and shifts to the power saving mode.

Next, in step S65, the control circuit 11 checks the state of the RW switch 32. Here, when the state change of the RW switch 32 is not detected,
That is, when the change from the off state to the on state is not detected, the process returns to the above-described step S61 and shifts to the power saving mode.

In step S65, when an intermediate rewind button (not shown) interlocked with the RW switch 32 is operated, an ON signal is generated and a command signal for requesting the film rewind operation is generated. If the control circuit 11 confirms, the film rewinding operation is not immediately executed, and the process proceeds to the next step S66.

In step S66, the control circuit 11
Indicates that the user performs a predetermined operation (operation of the midway rewind button) in the above-described step S65 and
After the history information indicating that the command signal (ON signal) has been generated is stored in a predetermined storage means (not shown), the process proceeds to the next step S67.

At the step S67, the control circuit 11
Confirms whether or not there is an abnormality in the shutter closing operation by searching the contents relating to the abnormality history information stored in the storage means. Here, when there is history information on the abnormality of the shutter closing operation, the sector 21.2.
2 (see FIGS. 5 and 6) may cause the opening 20 to be in an open state.

Accordingly, in this case, the process proceeds to step S68, and in this step S68, the control circuit 11
Performs drive control via the barrier drive circuit 36 so that the lens barrier 37 is closed. by this,
When the lens barrier 37 is completely closed, incident light reaching the exposure surface of the film from the outside of the camera through the opening 20 (see FIGS. 5 and 6) can be shielded. Even if the rewinding operation is performed, unnecessary re-exposure of the exposed portion of the film can be prevented.

Thereafter, the process proceeds to step S69. After performing the film rewinding operation in step S69, the control circuit 11 initializes the history information relating to the rewinding request in step S70, and proceeds to step S61. Return to the processing of.

On the other hand, if there is no history information on the abnormality of the shutter closing operation in the above-mentioned step S67, the process immediately proceeds to step S69, and after the film rewinding operation is similarly performed, the process proceeds to step S70. Initialization processing of the history information relating to the return request is performed, and the processing returns to the above-described step S61.

The sequence of the non-operation process is maintained as long as a failure or the like is not eliminated by performing a repair or the like.

As described above, according to the fourth embodiment, even in a camera in which the lens barrier 37 is automatically opened and closed based on the signal of the PW switch 35, the closing operation of the shutter unit 17 is performed. When there is a request for the film rewinding operation in the case where there is an abnormality, the film barrier rewinding operation is not immediately executed, the drive of the lens barrier 37 is controlled, and the lens barrier 37 is closed.
Since the film rewinding operation is performed, the exposed portion of the film can be reliably protected, and the film can be safely taken out of the camera.

In the cameras of the above embodiments, the shutter unit which controls the exposure at the time of photographing and is driven at the time of the exposure operation is exemplified by shutter means constituted by sectors and the like. However, the present invention is not limited to this, and can be easily applied to other shutter means such as a focal plane shutter.

[Supplementary Note] According to the above-described embodiment, an invention having the following configuration can be obtained.

(1) An openable / closable barrier for covering the front surface of the taking lens, a film feeding means for winding / unwinding the film, a detecting means for detecting the open / closed state of the barrier, and an abnormality of the photographing operation. A camera comprising: a judging means for judging; and a control means for controlling a camera operation based on outputs of the detecting means and the judging means.

(2) In the camera described in Supplementary Note 1,
The control means performs different camera control between when the barrier is opened and when the barrier is closed.

(3) In the camera described in Appendix 1,
The control means prohibits the rewinding operation of the film unless the detecting means detects the closed state of the barrier when the judging means judges that the shutter closing operation is abnormal.

(4) In the camera described in Supplementary Note 1,
The control means controls the film rewinding operation.

(5) In the camera described in Supplementary Note 1,
The detecting means detects the open / closed state of the barrier based on the output of the photometric means for measuring the luminance of the subject.

(6) In the camera described in Supplementary Note 1,
The determining means includes a shutter abnormality detecting means for determining an abnormal operation of the shutter for performing the exposure control.

(7) In the camera described in Appendix 1,
The determination means determines an operation abnormality in which the shutter does not close.

(8) In the camera described in the appendix 1,
The determination means is means for determining an abnormality in the sector operation of the sector shutter.

(9) In the camera described in the appendix 1,
The determination means is means for determining an abnormal operation of the focal plane shutter.

(10) In the camera described in Appendix 1, the control means, if the determination means determines that the shutter closing operation is abnormal, unless the detection means detects the closed state of the barrier, Prohibit rewinding operation.

(11) A barrier covering the front surface of the photographing lens, a detecting means for detecting the open / closed state of the barrier, a judging means for judging an abnormal photographing operation, and the judging means judging an abnormal photographing operation. And a means for permitting a predetermined operation of the camera when the detecting means detects that the barrier is in a closed state.

(12) A barrier covering the front surface of the photographing lens, detecting means for detecting the open / closed state of the barrier, determining means for determining an abnormality of the photographing operation, and determining that the photographing operation is abnormal. A camera having means for prohibiting the operation of the camera in response to the detection, and means for starting a predetermined operation of the camera in response to the detection means detecting that the barrier has been closed.

(13) In the camera described in Supplementary Note 11 or 12, the predetermined operation of the camera is a film rewinding operation.

(14) A barrier covering the front surface of the taking lens, a driving means for opening and closing the barrier, an instructing means for instructing the driving means to close the barrier, and a judging means for judging an abnormal photographing operation. Wherein the instruction means instructs the closing drive of the barrier in response to the determination means determining an abnormality in the photographing operation.

(15) In the camera described in Supplementary Note 11, 12, or 14, the judging means includes a shutter abnormality detecting means for judging an abnormal operation of a shutter for performing exposure control.

(16) In the camera described in Supplementary Note 11, 12, or 14, the photographing operation is a shutter operation (exposure operation).

(17) In a camera for detecting an abnormal operation and inhibiting the operation of the camera, a shutter for performing an exposure operation, abnormality detecting means for detecting an abnormal operation of the shutter, a barrier covering the front surface of the taking lens, A feeding unit that winds and rewinds the file; and a control unit that controls the operation of the camera. The control unit is configured to detect a malfunction of the shutter based on an output from the abnormality detection unit. A camera that allows the film to be rewound when the camera is in the closed state or after the barrier is closed.

[0174]

As described above, according to the present invention, in a camera for taking a photograph, even if an abnormality is detected in the photographing operation, it is possible to appropriately cope with at least the exposed portion of the film. It is possible to provide a camera capable of securely protecting the film and taking out the film safely outside.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a camera according to a first embodiment of the present invention, showing a state where a barrier member is closed and non-photographing is being performed.

FIG. 2 is a perspective view showing a state of the camera of FIG. 1 at the time of shooting with a barrier member opened.

FIG. 3 is a block diagram showing a main part of an electrical internal configuration of the camera shown in FIG. 1;

4 is a timing chart showing a state (position) of a barrier member and a change in an on / off state of a BRO switch and a BRC switch in the camera of FIG. 1;

FIG. 5 is a configuration diagram illustrating a shutter unit taken out of the camera in FIG. 1, illustrating a case where a shutter is in a closed state.

FIG. 6 is a configuration diagram illustrating a shutter unit taken out of the camera in FIG. 1, illustrating a case where a shutter is in an open state;

7 is a timing chart showing a relationship between a state of a shutter opening and a PI output signal when a shutter unit is driven by energizing a solenoid in the camera of FIG. 1;

FIG. 8 is a flowchart showing a basic operation when taking a picture in the camera of FIG. 1;

FIG. 9 is a flowchart showing a sequence of an exposure operation in the camera of FIG. 1;

FIG. 10 is a flowchart showing a sequence of non-operation processing in the camera of FIG. 1;

FIG. 11 is a flowchart showing a sequence of non-operation processing in the camera according to the second embodiment of the present invention.

FIG. 12 is a flowchart showing a sequence of a shutter return operation in the non-operation processing sequence in the camera of FIG. 12;

FIG. 13 is a main block diagram showing an electrical internal configuration of a camera according to a fourth embodiment of the present invention.

FIG. 14 is a flowchart showing a sequence of non-operation processing in the camera of FIG. 13;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Camera 2 ... Barrier member (barrier, lens barrier) 3 ... Release button 4 ... Flashlight emitting device 5 ... Shooting lens barrel 5a ... Shooting lens 6 ... Objective lens (finder optical system) 7 ... ... Photometric sensor window (photometric circuit) 11. Control circuit (control means, abnormality detecting means, abnormality determining means, drive instructing means, shutter abnormality detecting means) 12... Photometric circuit (barrier state detecting means) 13. Detection circuit 14 Shutter drive circuit 15 Film detection circuit 16 Motor drive circuit 17 Shutter unit 18 Film feed unit (film feed means) 20 Shutter aperture 21/22 Sector 27 ...... Solenoid 27a ... Plunger 29 ... PI (photo interrupter, barrier state detecting means) 31 ... RW Switch (release switch) 32 BRO switch (barrier state detecting means) 33 BRC switch (barrier state detecting means) 35 PW switch (power switch, barrier state detecting means) 36 ... barrier driving circuit (driving) Means) 37 Lens barrier

Claims (3)

[Claims] 1. A barrier for covering a front surface of a photographing lens, a detecting means for detecting an open / closed state of the barrier, a judging means for judging an abnormal photographing operation, and A camera for prohibiting the operation of the camera in response thereto; and a means for permitting a film feeding operation when the detecting means detects that the barrier is in a closed state. 2. A barrier for covering the front surface of the photographing lens, a detecting means for detecting the open / closed state of the barrier, a judging means for judging an abnormal photographing operation, and Means for prohibiting the operation of the camera in response thereto, and means for starting the film feeding operation in response to the detection means detecting that the barrier has been closed. . 3. A barrier that covers the front surface of the photographing lens, a driving unit that opens and closes the barrier, a judging unit that determines an abnormality in the photographing operation, and a control unit that controls the operation of the camera. A camera, wherein the control means instructs the drive means to close the barrier in response to the determination of the abnormality in the photographing operation by the determination means, and thereafter permits the film feeding operation.