JPH07104359A - Film winding device for camera - Google Patents

Abstract

PURPOSE:To prevent the lowering of the reliability of the actions of a camera constituted so that it may select any process that photographing is inhibited or photographing is continued in accordance with the type of abnormality in the case abnormal action occurs at the time of photographing. CONSTITUTION:This camera is provided with a 1st detection means S3 detecting the occurrence of the abnormality which hinders photographing actions from being continued, and a 2nd detection means 52 detecting the occurrence of the abnormality to such an extent that reset can be possible; and a control means 50 is constituted so that it may inhibit photographing when the abnormality is detected by the means S3, and it may compare abnormality occurring frequency with a previously set reference value so as to continue photographing in the case the frequency is smaller than the reference value and execute either the inhibition of photographing or giving a warning in the case the frequency is equal to or larger than the reference value when the abnormality is detected by the means 52.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera configured to select either photography prohibition or photography continuation according to the type of abnormality when an operation abnormality occurs during photography.

[0002]

2. Description of the Related Art Conventionally, there has been provided a camera constructed so that, when an abnormality occurs in a photographing mechanism, a warning is given to inform a photographer of the abnormality and at the same time, photographing is prohibited. . In this case, a warning is issued each time an abnormal operation occurs, and shooting is prohibited.If a temporary resettable error occurs due to an external factor that is not a malfunction (shooting can continue. Since it will not be possible to shoot even if there is a possibility), in such a case it is desirable to set the camera so that it can continue shooting. In other words, it is desirable that if the abnormality that has occurred is a temporary one that can be reset, the shooting can be continued for the time being, and if not, the shooting is prohibited.

On the other hand, at the time of occurrence of a resettable temporary abnormality in which there is a possibility that the photographing can be continued in this way, the fact that the abnormality is detected is stored in, for example, a memory,
It is possible not to give a warning or prohibit photography at all, but in that case, the photographer does not know that the occurrence of the operation abnormality is temporary, and if the frequency increases. The reliability of the camera will be reduced.

Therefore, the technical problem to be solved by the present invention is that, when an operation abnormality occurs at the time of shooting, either continuous shooting or shooting prohibition is selected depending on whether the abnormal operation is temporary or not. Is to prevent the reliability of the operation of the camera configured so as to decrease.

[0005]

Means for Solving the Problems and Actions / Effects The camera according to the present invention is characterized in that it is configured as follows in order to solve the above technical problems.

That is, the camera according to the present invention comprises a control means for controlling the photographing operation, and an abnormality detection means connected to the control means for detecting an operation abnormality at the time of photographing. First detection means for detecting the occurrence of an abnormality that interferes with the continuation of the shooting operation (for example, an abnormality of the shooting mechanism itself, the case where the film cannot be rewound and rewound), and a resettable abnormality (for example, insufficient aperture, Detecting the occurrence of excessive narrowing down, deviation of shutter speed, deviation of film feed during winding operation, mirror not rising during shooting, shutter not opening, shutter not fully charged after release, etc. The control means prohibits the photographing when the first detection means detects an abnormality, and the second detection means. When an abnormality is detected in, the occurrence frequency of the abnormality is compared with a predetermined reference value,
When the frequency is lower than the reference value, shooting is continued, and when the frequency is higher than the reference value, at least one of shooting prohibition and warning is executed.

In the above structure, when an operation abnormality occurs during image capturing, whether the abnormality is an obstacle to the continuation of the image capturing operation depending on whether the abnormality is detected by the first or second detecting means, or Instead, it is determined whether the abnormality is a resettable abnormality. If the abnormality is an obstacle to the continuation of the shooting operation, the shooting is prohibited.

On the other hand, if the operation is resettable,
The frequency of occurrence is compared with the reference value, and if there is no abnormality at a predetermined frequency or more, the shooting operation can be performed.If the frequency of occurrence of abnormality is at least the predetermined value, at least one of shooting prohibition and warning display is executed. It

That is, if the abnormality occurs continuously a predetermined number of times or more, the same abnormality occurs a predetermined number of times in total, or the same abnormality occurs at a rate of a predetermined number or more, photographing is prohibited. Or a warning is displayed. As described above, when abnormalities occur frequently, photographing is prohibited, and moreover, it is possible to prevent an increase in the number of times of warning display and photographing prohibition due to the occurrence of abnormalities, so that the reliability of the camera can be prevented from lowering.

In the above configuration, for example, a slight abnormality (when the aperture does not reach the set value, when the shutter speed comes, when the film is fed for one frame or more in the winding operation, the preview operation (depth of field) is performed. (The operation to narrow down the aperture without flipping up the mirror for confirmation)
Such as abnormal operation when it does not directly affect shooting,
When the film is exposed for a while, the number of times that can be taken is increased, and relatively serious abnormalities (when the mirror does not rise during shooting, when the shutter does not open during shooting, shutter charging is not fully performed and shutter is released when charging is completed). It is preferable to set a reference value in accordance with the significance of the abnormal operation so that the number of times the image can be taken is reduced in the case where the film is exposed to a certain degree (abnormality such that the film is not exposed).

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera according to an embodiment of the present invention shown in FIGS. 1 to 12 will be described in detail below. First, the shutter / diaphragm drive mechanism of this camera will be described with reference to FIG. In this mechanism, a large number of parts such as levers, gears and cams are arranged at overlapping positions, and each part is intricately complicated.Therefore, in the figure, the purpose is not to show the vertical relationship of each part, etc. , Different line types are used only for the purpose of clearly showing the shape of each component.

In the figure, 1 is a release magnet fixed in the body of the camera, and 2 is a lever rotatably held by an axis P1. When the release magnet 1 is energized, the release magnet 1 attracts the attracting portion 2a of the lever 2 and rotates the lever 2 counterclockwise about the axis P1 from the position shown in FIG. The release magnet 1 also serves as a magnet for stopping the diaphragm at a predetermined diaphragm value. On the other hand, the lever 2 is urged by a spring (not shown) in the clockwise direction in the figure about the axis P1 (hereinafter, all the rotation directions are the rotation directions in the drawing). The power is set to be weaker than the attraction force of the release magnet 1.

The lever 3 is rotatably held by the shaft P2 and is urged counterclockwise by a spring (not shown). However, in the state before the release, the locking portion 2b formed at one end of the lever 2 and the locking portion 3a of the lever 3 are engaged with each other so that the lever 3 is prevented from rotating in the counterclockwise direction. Has become.

The lever 4 is rotatably held by the shaft P3, and is biased counterclockwise by a spring (not shown). Energizing the release magnet 1 causes the lever 3
When the locking portion 3a of the lever 2 and the locking portion 2b of the lever 2 are disengaged and the lever 3 rotates counterclockwise, the surface 3b of the lever 3 contacts the surface 4a of the lever 4 so that the lever 4 rotates clockwise. The urging force of each lever 3 and 4 is defined.

The lever 5 is rotatably held on the same axis P3 as the lever 4, and its tip 5a is engaged with the recess 3c of the lever 3. Therefore, when the engaging portions 2b and 3a are disengaged and the lever 3 rotates counterclockwise, the lever 5 rotates clockwise about the axis P3.

The levers 6 and 7 are both rotatably held by the shaft P4. The lever 6 is biased in the counterclockwise direction by a spring (not shown), and when the lever 6 rotates in the counterclockwise direction, the lever 7 also rotates integrally. When the release magnet 1 is energized, the tip portion 7a of the lever 7 is released.
The levers 6 and 7 are prevented from rotating by being attracted to. When the lever 3 is locked to the lever 2 as shown in FIG. 1, the levers 6 and 7 are stopped by the lever 3 and do not rotate counterclockwise even if the magnet 1 is not energized. When the lever 3 rotates clockwise, the levers 6 and 7 also rotate clockwise.

A gear 8 is arranged substantially at the center of the drawing. The gear 8 has an encoder portion 8a, an aperture stop plate portion 8b, and a locking portion 8c coaxially. Encoder part 8a
Is a substantially disk-shaped member having a large number of radially arranged slits on its outer peripheral edge, and is disposed between the light emitting and receiving parts of a photo coupler (not shown) (reference numeral 52 in FIG. 3, which will be described later) and rotates. Sometimes the photo coupler outputs a pulse signal. The aperture locking plate portion 8b is provided when the lever 7 rotates counterclockwise from the position shown in the drawing.
It is configured to stop the rotation of the gear 8 by meshing with the tip portion 7b of the. When the lever 4 is at the position shown in the figure, the locking portion 8c meshes with the locking portion 4b at the tip thereof to prevent the gear 8 from rotating in the clockwise direction.

On the other hand, the gear 8 meshes with the gear 10 through a reduction gear 9 (large and small gears) (the tip circle diameter is shown by a solid line and the pitch circle diameter is shown by a one-dot chain line for convenience of drawing). Cage, gear 10 is a lever that determines the aperture of the lens
It meshes with (not shown). The throttle lever (not shown) is biased in the throttle direction by a spring (not shown), and the throttle direction corresponds to the clockwise direction of the gear 8.

A gear 11 is arranged on the same axis as the gear 10. The gear 11 has teeth partially formed, and a cam gear member 12 including a plurality of cams and gears.
A gear 12a having the same partial teeth, which constitutes (a motor M (FIG. 3) which will be described later, is driven to rotate clockwise)
It is supposed to mesh with. When the gear 12a rotates clockwise, the gear 11 rotates counterclockwise by a certain angle. At this time, the gear 10 also rotates in the counterclockwise direction, whereby the spring of the above-described throttle lever is charged and the throttle is opened.

Reference numeral 13 denotes a lever for charging a mirror, which will be described later, which is rotatably held by an axis P5,
It is biased counterclockwise by a spring (not shown).
The end surface 13a of the lever 13 is formed with the cam surfaces 12b to 12f of the cam gear member 12 (the cam surface 12e is located on the same circumference as the tip circle of the input gear 12j to which the rotation is transmitted from the motor M). Abut. When the cam gear member 12 rotates in the clockwise direction from the position shown in the drawing, the lever 13 moves to the end face 13
When a contacts the cam surfaces 12b, 12c, 12d, 12e in order, it rotates clockwise about the rotation axis P5 against the urging force of a spring (not shown). Next, the cam gear member 1
When 2 further rotates in the clockwise direction, the lever 13
Since the end surface 13a sequentially contacts the cam surfaces 12f and 12b from the cam surface 12e, the shaft P5 is rotated by the spring biasing force (not shown).
1 is rotated counterclockwise to return to the state of FIG.

The cam gear member 12 has a cam surface 12i that comes into contact with the front end surface 5b of the lever 5 to rotate the lever 5 counterclockwise about the axis P3 when it rotates clockwise. As described above, since the tip portion 5a of the lever 5 is engaged with the concave portion 3c of the lever 3, the lever 5
Is rotated counterclockwise, the lever 3 moves to the axis P.
Rotate clockwise around 2. When the cam gear member 12 continues to rotate clockwise and the cam surface 12i separates from the tip surface 5b of the lever 5, the lever 3 rotates counterclockwise about the axis P2 by the urging force of a spring (not shown). Since the tip portion 5a of the lever 5 is engaged with the concave portion 3c of the lever 3, the lever 5 is rotated in the clockwise direction about the axis P3 to return to the state of FIG. 1 accordingly.

The cam gear member 12 further has a gear 12g having teeth partially formed. This gear 12g
Engages with the gear portion 18a of the shutter charge gear 18 that constitutes the shutter charge mechanism shown in FIG. The shutter charge gear 18 is biased clockwise by a spring (not shown), and when the shutter locking by the shutter locking mechanism (not shown) is released, the shutter charging gear 18 rotates clockwise by the spring biasing force, At the position of FIG. 10, it abuts against a stopper (not shown) and stops. When the cam gear member 12 rotates clockwise from the position shown in FIG.
The gear 12g is the gear portion 18a of the shutter charge gear 18.
11 (FIG. 11), the shutter charge gear 18 starts rotating counterclockwise against the spring biasing force (not shown). That is, the shutter is charged.

When the gear 12a further rotates in the clockwise direction, the cam gear member 1 is slightly before the gear 12g disengages from the gear portion 18a of the shutter charge gear 18.
Even if the cam surface 12h of No. 2 and the end surface 18b of the shutter charge gear 18 come into contact with each other (Fig. 12) and the mesh between the gear 12g and the gear portion 18a is disengaged, the end surface 18b is pushed by the cam surface 12h to move the shutter charge gear 18 counterclockwise. Turn around. While the cam surface 12h of the cam gear member 12 pushes the end surface 18b of the shutter charge gear 18, the shutter charge gear 18 enters the overcharge region,
The shutter locking mechanism (not shown) returns to the lockable position (the position where the shutter curtain can be held). At this time, gear 1
When 2g is further rotated and the cam surface 12h is disengaged from the end surface 18b, the shutter charge gear 18 rotates clockwise by the amount of overcharge due to the urging force of a spring (not shown),
A shutter locking mechanism (not shown) locks the shutter charge gear 18 together with the shutter curtain at the position shown in FIG.

A position detecting switch (S3, S4 (FIG. 3) described later) is provided below the cam gear member 12, and the end surface 13a of the lever 13 is in contact with the cam surface 12b as shown in FIG. Then, the switch S3 is turned on, and the switch S4 is set to be turned on when the cam gear member makes a half turn from there. That is, the position of the cam gear member 12 can be detected at two positions.

Next, the mirror mechanism will be described with reference to FIG. First, 21 is a lever rotatably held by the shaft P6. The lever 21 is biased counterclockwise by a spring (not shown), but is prevented from rotating counterclockwise from the position shown by a stopper (not shown). The lever 21 has a surface 21a that can come into contact with the surface 3d of the lever 3 described above (in FIG. 2, the shape is simplified compared to FIG. 1), and when the lever 3 rotates counterclockwise. The surface 3d contacts the surface 21a. The urging force of the lever 3 in the counterclockwise direction is
It is set to be stronger than the urging force of the lever 21 in the counterclockwise direction, and when the lever 3 rotates in the counterclockwise direction, the lever 21 rotates in the clockwise direction.

Reference numeral 22 is a lever rotatably held on the shaft P7. This lever 22 is attached to the shaft P7 by a spring 23.
Although it is urged in a clockwise direction about the center of the arrow, depending on the position of the lever 21, the end surface 22a of the lever 22 comes into contact with the end surface 21b of the lever 21 to prevent its rotation. The above-mentioned surface 13b of the lever 13 is arranged so as to face the end surface 22b of the lever 22, and when the lever 13 rotates in the clockwise direction, the lever 22
Rotates counterclockwise about the axis P7. Further, a shutter locking release lever (not shown) is arranged so as to face the end 22d of the lever 22, and when the lever 22 rotates clockwise from the position shown in the figure, the end 22d is released by the shutter member. The shutter release gear 18 is brought into contact with the stop release lever to release the locked state (state shown in FIG. 9) of the shutter charge gear 18.

Reference numeral 26 denotes a mirror, which guides the light passing through the taking lens to the finder when in the lowered position shown in the drawing.
At the time of shooting, it rises and retracts from the optical path from the shooting lens to the film. 27 is this mirror 26
Is a mirror holder that holds rotatably, is rotatably held on the axis P8, and rotates integrally with the mirror 26.

The lever 22 is provided with a shaft 22c, and one end of a lever 24 is rotatably held around the shaft 22c. The bent portion 24a formed on the other end side of the lever 24 is arranged to face the convex portion 27a provided on the mirror holder 27. And the lever 24
In order to urge the mirror holder 27 to the lowered position when is in the state shown in the figure, a spring 25 is hooked between the convex portion 27a provided on the mirror holder 27 and the hook 24b of the lever 24.

Next, the circuit configuration of this camera will be described with reference to the block diagram shown in FIG. First, what is shown in the center of the figure is a camera control microcomputer (hereinafter referred to as CPU) 50 as a control means for performing functions such as camera sequence control and exposure calculation control. It is equipped with various data buses and input / output terminals.

Reference numeral 51 denotes a photometric circuit for measuring the brightness of the object, which includes a photoelectric conversion element for light reception, an A / D (analog / digital) conversion section, a reference voltage source for A / D conversion, and a CPU 50.
And a data transmission / reception unit, etc., and performs photometry by light transmitted through the taking lens according to a command from the CPU 50, and calculates an aperture value and a shutter speed value at which proper exposure is obtained.

S1 is a photometric switch that is turned on in the first step of pressing down a release button (not shown) configured as a two-step push-down type. When the photometric switch S1 is turned on by operating the release button, the CPU 50 Photometric circuit 51
A signal for starting photometry is output to. Further, S2 is a release switch which is turned on in the second step of pressing the release button. When the release switch S2 is turned on in the release possible state, the release operation is executed by the output signal from the CPU 50. The photometric switch S1 is held in the ON state even when the release switch S2 is turned ON. As described above, S3 and S4 are position detection switches for the cam gear member 12, which are alternately turned on every half turn of the cam gear member 12, and in particular, S3 is an abnormality that hinders the shooting operation. It is used as a first detection means for detecting the.

M is a motor, and the cam gear member 12 is configured to rotate clockwise when the motor is energized. RFMg is the reference numeral 1 in FIG.
It is the release magnet shown in. Also, 1 CMg, 2
CMg is a magnet for holding the front curtain and the rear curtain of the shutter, respectively.
It is configured to hold the trailing curtain. The shutter speed is the time from turning off the power to the front curtain magnet 1CMg to release the shutter front curtain, and then turning off the power to the rear curtain magnet 2CMg to release the shutter rear curtain. Equivalent to.

Reference numeral 52 is a diaphragm encoder composed of a photocoupler consisting of a light emitting diode 52a and a phototransistor 52b. When the encoder portion 8a of the gear 8 rotates, the light sent from the light emitting diode 52a to the phototransistor 52b is intermittently. Blocked, pulse signal F
P is output. The encoder 52 and the encoder section 8a of the gear 8 constitute second detecting means for detecting whether or not the diaphragm operation is normally performed. RESE
T is a reset terminal that is pulled up to the voltage VDD by the resistor R1 and resets the CPU when the signal changes from the L level to the H level. Further, X is a crystal oscillator for giving a clock signal to the CPU 50.

The operation of the camera at the time of shooting will be described below with reference to the flowcharts shown in FIGS. In this sequence, when the photometric switch S1 is turned on by pressing the release button to the first step, the brightness of the subject is measured in step # 101, and the exposure value is calculated based on the measured value to calculate the exposure value. , Determine the proper aperture value and shutter speed. Next, at step # 102, is the release switch S2 turned on at that time?
Whether it is off or not is determined. If it is off, the process returns to step # 101 to repeat photometry and exposure value calculation.

When the release switch S2 is turned on, the process proceeds to step # 103, and the release magnet 1 (RFMG)
Then, electricity is supplied to the shutter front curtain holding magnet 1CMG and the shutter rear curtain holding magnet 2CMG. At this time, in FIG. 1, the lever 2 has a suction portion 2a.
Is attracted by the release magnet 1 and rotates counterclockwise around the axis P1. Therefore, the locked state between the locking portion 2b of the lever 2 and the locking portion 3a of the lever 3 is released, and the lever 3 is rotated counterclockwise by the spring (not shown).

Then, the surface 4a of the lever 4 is pushed by the surface 3b of the lever 3, so that the lever 4 rotates clockwise about the axis P3 against the biasing force of the spring (not shown). Therefore, the locked state of the locking portion 8c of the gear 8 and the locking portion 4b of the lever 4 is released, and the gear 8 is clocked while the diaphragm of the photographing lens is narrowed by the biasing spring of the diaphragm lever (not shown). It rotates in the direction of rotation (Fig. 6). Also,
As the gear 8 rotates, the encoder portion 8a also rotates integrally, so that the pulse signal F from the diaphragm encoder 52 is generated.
P is output.

Here, it is determined in step # 104 whether or not the pulse FP has been output even after the lapse of a predetermined time t ₅ from the energization of the release magnet RFMg. If there is an output, the process proceeds to step # 105. . Step # 1
At 05, this pulse FP is counted. It should be noted that the lever 3 is turned on by energizing the release magnet 1 (RFMg).
Is rotated so that the levers 6 and 7 are also rotatable, but at this time, since the tip end 7a of the lever 7 is attracted to the release magnet 1, the levers 6 and 7 do not rotate counterclockwise.

When the gear 8 starts to rotate, next, in step # 106, the process waits until the number of pulses FP corresponding to the aperture value of the lens is counted, and when the predetermined number is counted, step #
Proceeding to 107, the power supply to the release magnet 1 (RFMg) is stopped. Then, the levers 6 and 7 simultaneously rotate counterclockwise around the axis P4, and the tip end portion 7b of the lever 7 meshes with the diaphragm stop plate portion 8b of the gear 8 to stop the rotation of the gear 8. It is set to a predetermined value,
The narrowing is completed. The state of the mechanism at this time is shown in FIG.

On the other hand, when the pulse FP is not output after the lapse of t ₅ time in step # 104, the locking portion 8c of the gear 8 and the locking portion 4b of the lever 4 are locked for some reason. It is determined that the state has not been released. That is, it is determined that an abnormality has occurred, and in step # 108, 1 is added to the counter N ₂ and the process proceeds to step # 107. The count in the step # 106 when not reach the predetermined number, the process proceeds to step # 109, the energization start to release the magnet RFMg, whether a predetermined time t ₆ has elapsed or not. When the time t ₆ has not elapsed, the process returns to step # 106, but when the time t ₆ has elapsed, it is determined that the diaphragm has not been normally narrowed down, and step # 11 is executed.
The process proceeds to 0, increments the counter N ₁ by 1, and then proceeds to step # 10.
Proceed to 7. It should be noted that in order to confirm whether the stop of the diaphragm has been normally performed, it may be determined whether or not the number of pulses is larger than a predetermined value within a predetermined time from the start of energization of the release magnet RFMg. Good.

In this way, when the engagement state between the engagement portion 8c of the gear 8 and the engagement portion 4b of the lever 4 is not released,
If the aperture is not stopped normally, or if the stop of the aperture is not stopped normally, there is no problem in continuing the shooting operation after that, and there is a possibility that it is an accidental abnormality. Since it is high, the warning display for the abnormality is not displayed at this stage, and the shooting sequence is continued.

On the other hand, on the side of the mirror mechanism, since the lever 3 rotates counterclockwise, the surface 3d pushes down the surface 21a of the lever 21 in FIG.
Rotates clockwise about the axis P6. At this time, the locked state between the end surface 21b of the lever 21 and the end surface 22a of the lever 22 is released, and the biasing force of the spring 23 causes the lever 22 to rotate clockwise about the axis P7. Therefore, since the lever 24 moves upward in the drawing, the bent portion 24a of the lever 24 comes into contact with the convex portion 27a of the mirror holder 27 that supports the mirror 26, and the mirror holder 27 is rotated counterclockwise about the axis P8. And the mirror 26 is raised. The lever 22 is prevented from rotating when it comes into contact with a stopper (not shown). At this time,
As shown in FIG. 8, the mirror 26 is raised to a position where it is completely retracted from the optical path from the taking lens to the film surface, and the flip-up operation is completed.

When the lever 22 rotates in the clockwise direction, the end 22d of the lever 22 comes into contact with a shutter lock release lever (not shown) to release the shutter charge gear 18 from the locked state. Therefore, the front and rear curtains of the shutter are allowed to travel, but at this time, since the holding magnets 1CMg and 2CMg are still energized, the front and rear curtains do not travel and the shutter charge gear 18 Only the chimney rotates (Fig. 10). Then, in step # 111, it waits for a predetermined time t ₁ to elapse after the release magnet RFMg is energized. This time t ₁
Is the time defined so that the diaphragm is narrowed down and the mirror 26 is completely raised.

In step # 112, the shutter front curtain holding magnet 1CMg is de-energized and the shutter front curtain is made to travel. Next, at step # 113, the time t ₂ set as the exposure time of the film is awaited, and at step # 114, the shutter rear curtain holding magnet 2CMg is de-energized to allow the shutter rear curtain to run and the proper shutter is released. Expose the film at speed. Then, in step # 115, after the time t ₃ sufficient for the rear curtain of the shutter to travel is elapsed, the shutter, the mirror, and the aperture are charged.
At 6, the energization of the motor M is started.

When the motor M is energized, its rotation is transmitted to the cam gear member 12 via a reduction gear (not shown), and
At, the cam gear member 12 rotates in the clockwise direction.
Then, the cam surface 12i contacts the end surface 5b of the lever 5, and the lever 5 is rotated counterclockwise about the axis P3. Since the tip portion 5a of the lever 5 is engaged with the concave portion 3c of the lever 3, when the lever 5 rotates in this way, the lever 3 rotates in the clockwise direction against a spring biasing force (not shown). Further, when the lever 3 rotates, the lever 6 rotates clockwise against the spring biasing force (not shown), and the lever 7 also rotates at the same time.
The engagement state between the front end portion 7b and the aperture stop plate portion 8b of the gear 8 is released. It should be noted that the lever 6 can be rotated further clockwise even after the tip 7a of the lever 7 comes into contact with the release magnet 1 and the lever 7 stops.

At this time, since the release magnet 1 is not already energized, when the locking portion 3a of the lever 3 exceeds the locking portion 2b of the lever 2, the lever 2 is rotated clockwise by the urging force of a spring (not shown). Rotate in the direction. When the cam surface 12i of the cam gear member 12 is separated from the tip surface 5b of the lever 5, the lever 3 tries to rotate counterclockwise about the axis P2 by the urging force of a spring (not shown). Since the locking portion 3a and the locking portion 2b of the lever 2 are engaged, rotation of the lever 3 in the counterclockwise direction is prevented.
On the other hand, since the lever 4 is biased in the counterclockwise direction about the axis P3 by the spring (not shown), the lever 3 rotates in the counterclockwise direction around the axis P2 in the clockwise direction. , Cam surface 8d of gear 8 and lever 4
The front end 4c of the locking surface 4b of the above contacts. Since the lever 3 rotates further clockwise than the position at that time, the surface 3b of the lever 3 and the surface 4a of the lever 4 are separated from each other.

When the cam gear member 12 further rotates in the clockwise direction, the gear 12a of the cam gear member 12 moves to the gear 11a.
, The gear 11 rotates counterclockwise, and the throttle lever (not shown) is charged in the aperture opening direction.
Further, when the gear 11 rotates, the gear 8 further rotates counterclockwise through the gears 10 and 9, and when the diaphragm is completely opened, the locking portion 8c of the gear 8 becomes the locking portion of the lever 4. 4b and the diaphragm is locked in the open position (Fig. 1).

While the diaphragm is being charged, the lever 13
The end surface 13a of the lever moves along the cam surfaces 12c and 12d of the cam gear member 12, whereby the lever 13 rotates in the clockwise direction about the axis P5. At this time, since the end surface 22b of the lever 22 is pushed by the surface 13b of the lever 13, the lever 22 rotates counterclockwise around the axis P7 from the position of FIG. 7, and the lever 24 moves downward accordingly. . When the lever 24 moves downward, the mirror holder 27
Rotates clockwise about the axis P8, and the mirror 2
6 will descend.

When the end surface 22a of the lever 22 exceeds the end surface 21b of the lever 21, the surface 3d of the lever 3 has already moved upward, so that the lever 21 is rotated about the axis P6 by a spring biasing force (not shown). It is ready to rotate clockwise. The cam gear member 12 further rotates and the lever 13
When the end surface 13a of the lever abuts on the cam surface 12e of the cam gear member 12, the end surface 13b of the lever 13 becomes the end surface 22b of the lever 22.
Is pushed up most, and at this time, the locking surface 22a of the lever 22 further rotates counterclockwise around the axis P7 from the position shown in FIG. 2, and the lever 21 returns to the locking position shown in FIG.

When the cam gear member 12 further rotates and the end surface 13a of the lever 13 contacts the cam surface 12f of the cam gear member 12, the lever 13 is rotated counterclockwise by the urging force of a spring (not shown) about the axis P5. Rotate in the direction.
When the lever 13 rotates counterclockwise, the lever 22 rotates clockwise around the axis P7 by the urging force of the spring 23, and the locking surface 22a of the lever 22 becomes the locking surface 21b of the lever 21. When abutting, the lever 22 will be in the locked state of FIG. This completes the charging of the mirror 26.

On the other hand, when the aperture is returned to the open state and the mirror is returned to the lowered position (when the contact between the end surface 13a of the lever 13 and the cam surface 12d of the cam gear member 12 is almost finished), the cam gear member 12 is moved to the next position. The gear portion 12g meshes with the gear portion 18a of the shutter charge gear 18 (FIG. 11), and the shutter charge gear 18 is rotated counterclockwise (see FIG. 1).
2), charge the shutter. When the cam gear member 12 makes about one rotation from the start of rotation, charging of the shutter is also completed, the end surface 13a of the lever 13 contacts the cam surface 12b of the cam gear member 12, and the switch S3 is turned on.

[0051] Thus switch S3 are waiting to be turned on at step # 117, multiplying the predetermined time t ₄ a brake on the motor M proceeds to step # 118 confirms this. As a result, the rotation of the cam gear member 12 is stopped, and the state shown in FIG. 1 is restored. Then, in step # 119, the brake of the motor M is stopped and the power is turned off.
After it is confirmed at 120 that the counters N ₁ and N ₂ have not reached a predetermined number, at step # 121 the photographing standby state is entered.

If the counters N ₁ and N ₂ have reached a predetermined number, a warning is given in step # 122, and the release is prohibited thereafter. This is because it is possible to determine that a failure has occurred because the same abnormality has occurred before and the predetermined number of times has been reached in total. It should be noted that the warning of the abnormality is not limited to the predetermined number of times in total, and if the abnormality occurs twice in succession during the shutter release, or if it occurs more times in succession, the predetermined number of times in total. May occur, or the rate of occurrence may exceed a predetermined level. Further, the number of times and the ratio of these may be set differently depending on the significance of the abnormal operation.

Meanwhile, in step # 123, when the switch S3 in the step # 117 be sufficiently waited long t ₇ from the motor current is determined to have not become turned on, an abnormality warning proceeds to step # 124 At the same time, the motor M is turned off to prohibit the operation. In other words, it is prohibited to proceed to the next release sequence from the position where the switch S3 is not turned on. In such a case, since there is an abnormality in the mechanism or an abnormality in the signal, a warning is displayed and the subsequent release is performed. Is prohibited.

As described above, according to the present embodiment, when the same abnormality occurs continuously a predetermined number of times or more, the same abnormality occurs a predetermined number of times or more in the integration, or the same abnormality occurs at a predetermined rate or more. In some cases, warning is displayed or shooting is prohibited. Therefore, when abnormalities occur frequently, shooting is prohibited, and it is possible to prevent an increase in the number of times of warning display and shooting prohibition due to abnormalities, so that it is possible to prevent the reliability of the mechanism of the camera from decreasing.

[Brief description of drawings]

FIG. 1 shows a shutter of a camera according to an embodiment of the present invention.
It is a 1st operation state figure of a diaphragm drive mechanism.

FIG. 2 is a first operation state diagram of a mirror driving mechanism of this camera.

FIG. 3 is a block diagram showing a circuit configuration of this camera.

FIG. 4 is a flowchart showing an operation at the time of shooting.

FIG. 5 is a flowchart showing an operation at the time of shooting.

FIG. 6 is a second operation state diagram of the shutter / diaphragm drive mechanism.

FIG. 7 is a third operation state diagram of the shutter / iris drive mechanism.

FIG. 8 is a second operation state diagram of the mirror driving mechanism.

FIG. 9 is a first operation state diagram of the shutter charge mechanism.

FIG. 10 is a second operation state diagram of the shutter charge mechanism.

FIG. 11 is a third operation state diagram of the shutter charge mechanism.

FIG. 12 is a fourth operation state diagram of the shutter charge mechanism.

[Explanation of reference numerals] 1 release magnet 2 to 7 lever 8 gear (second detecting means) 9 to 11 gear 12 cam gear member 13 lever 18 charge gear 21,22 lever 23 spring 24 lever 25 spring 26 mirror 27 mirror holder 50 CPU ( Control means) 51 Photometric circuit 52 Aperture encoder (second detection means) M Motor S3 Position detection switch (first detection means)

Claims (1)

[Claims] 1. A control means (50) for controlling a photographing operation, and an abnormality detection means (S3, 8, 52) connected to the control means (50) and detecting an abnormality in operation during photographing. In the camera, the abnormality detecting means (S3, 8, 52) includes first detecting means (S3) for detecting the occurrence of an abnormality that interferes with the continuation of the photographing operation and first detecting means for the occurrence of a resettable abnormality. 2 detection means (8, 52), the control means (50) prohibits photographing when the first detection means (S3) detects an abnormality, while the second detection means (8, 52)
When an abnormality is detected in, the frequency of occurrence of the abnormality is compared with a predetermined reference value, and if the frequency is smaller than the reference value, shooting continues, and if the frequency is greater than or equal to the reference value, shooting is performed. A camera configured to perform at least one of prohibition and warning.