JPH103138A - Mechanism device provided with actuation monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm an actuation state reflecting the effect of adjustment operation by selecting a mode in which an actuation means is controlled based on a monitored result and a mode in which the actuation means is controlled regardless of the monitored result. SOLUTION: The mechanism means 7 is actuated by the actuation means and the actuation of the mechanism means 7 is monitored by monitoring means 10 and 11. A control means is provided with a mode in which the actuation means is controlled based on the monitored results of the monitoring means 10 and 11 and a mode in which the actuation means is controlled regardless of the monitored results. Then, the modes of the control means are selected by a selection means 22. That means, the mode in which the actuation means is controlled based on the monitored results of the monitoring means 10 and 11 and the mode in which the actuation means is controlled regardless of the monitored results of the monitoring means 10 and 11 are selected by the selection means 22. Therefore, a circuit automatically correcting the fluctuation of a shutter is actuated at a normal photographing time. Besides, a correction mechanism can be set so that it is not actuated when the shutter of a camera is adjusted in an inspection and adjustment process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism device provided with an operation monitor, which is most suitable for an operation monitor of a shutter used in a camera.

[0002]

2. Description of the Related Art With respect to conventional shutter control of a camera, there is left traveling means for a front curtain and a rear curtain for forming a shutter opening time as a part where a final electronic circuit cannot be introduced. That is, no matter how accurate the energization control timing of the electromagnet is controlled, the actual exposure time depends only on the mechanical biasing means of each curtain, and the exposure amount on the film surface is not obtained without obtaining the desired shutter time. There were drawbacks that were too short or too long.

In order to solve the above-mentioned problem, the present inventor disclosed in Japanese Patent Application Laid-Open No. 6-265965 and the like a method in which a travel detecting means is provided in a shutter to measure an actual shutter time, and a control time as an input. A method was disclosed in which a difference between measurement times as outputs was obtained, and an automatic correction mechanism was incorporated so that a correct measurement time could be obtained at the next exposure.

By the way, in a camera manufacturing factory,
Activate the camera shutter just before shipping the camera,
It is a well-known fact that an adjustment or inspection step is provided so that the exposure time is correct.

[0005]

When the shutter of the camera is adjusted in the above-described adjustment or inspection process, the shutter is operated again after making a fine adjustment, and it is determined whether or not the effect of the adjustment is reflected. It is necessary to confirm. However, if the automatic correction mechanism described above is operated, it is impossible to determine whether or not the adjustment result is reflected.

For example, when there is a defect in the mechanical mechanism of the shutter itself and the amount of the defect is minute, there is a concern that the automatic correction mechanism operates and the fact is hidden, and the defect cannot be determined. I have.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. In the inspection adjustment process, the correction mechanism is set to a non-operating state so that the operation can be confirmed in which the effect of the adjustment is reflected. Aim.

[0008]

In order to achieve this object, a mechanism device having an operation monitor according to the present invention comprises a mechanism means (7), an operation means (25) for operating the mechanism means,
Monitoring means (10, 11) for monitoring the operation of the mechanism means
Control means (24) having a mode for controlling the operating means based on the monitoring result of the monitoring means, and a mode for controlling the operating means irrespective of the monitoring result of the monitoring means;
And an operation monitor for selecting a mode of the control means.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a mechanism device provided with an operation monitor according to the present invention.

In FIG. 1, the camera 1 is in a state in which a back cover 12 is opened, a film cartridge (not shown) is loaded in a cartridge chamber 6, and a film drawn from the cartridge passes through a front surface of a shutter 7 and is spooled. 8 wrapped around. The pressure plate 13 provided inside the back cover 12 functions to keep the flatness of the film (not shown). The photographer
The situation of the subject passing through the lens 2 is visually recognized from the finder 3, and the start of exposure is commanded by pressing the release button 4. The exposure mode and various warnings can be confirmed on display means 5 such as an LCD.

In the vicinity of the shutter 7, LE indicated by a broken line is shown.
A non-contact sensor including D10 and PTR11 is provided, and measures the opening time of the shutter 7.

The camera 1 is provided with a connector 14 on a side surface thereof, and can exchange data with a personal computer 20 via a cable 22. Data output from the camera 1 includes, for example, detection data of various sensors such as a photometric signal, and conversely, input data to the camera 1 includes, in addition to the sensitivity adjustment data of the sensor, an automatic shutter related to the present invention. There is data for instructing the operation of the correction mechanism to be prohibited.

Since the personal computer 20 communicates data with the camera 1 via the cable 22, the coordinator (inspector) in the manufacturing process checks the status inside the camera 1 with the CR of the personal computer 20.
It can be confirmed on T21. In addition, personal computer 20
To control the camera 1 by transmitting a signal prohibiting the operation of the above-described automatic shutter correction mechanism. In the present embodiment, the situation in which the personal computer 20 is connected will be described as an inspection process.

FIG. 2 is an example of an electric circuit block of the camera 1 for controlling the above operation. This circuit is a battery 2 (not shown).
5 executes control with the CPU 24 as the center. C
The PU 24 has a direct or interface circuit 23.
The following signals are input via the.

The sequence of the camera 1 in addition to various manual operation switches, such as a photometric signal of the subject from the photometric means 40, film sensitivity information loaded from the film sensitivity detecting means 41, an exposure start signal from the switch detecting means 42 by the release button 10, and the like. A timing signal or the like for detecting a state is input. Also, signals from the PTR 11 and various data stored in the storage circuit 28 are input.

The CPU 24 performs the following control via the interface circuit 25.

The LCD 5 is driven to display information related to exposure,
Opening / closing control of the shutter 7, control of the aperture 26 in the lens 2, winding of the film by the motor 27, data exchange with an external device via the connector 14 according to the present invention, lighting of the LED 10 described above, Execute various data writing.

The LED 10 and the PTR 11 will be described in detail. First, the LED 10 is turned on before the shutter 7 is opened.
The pulse signal from the PTR 11 input during that
U24 measures the time, and finally turns off the LED 10. The difference between the actually controlled time signal and the measured signal is stored in the storage circuit 28, and an operation is performed so as to correct the control time according to the difference at the next control.

FIG. 3 is a time chart showing the relationship between the operation sequence of the camera 1 and the operation of the shutter 7. The magnet (M) for controlling the shutter front curtain and the shutter rear curtain is shown in FIG.
The running state of each curtain, which changes according to the on / off timing of g), and the output signal of the PTR 11 are shown.

When the shutter button 4 is pressed, first and second curtain magnets are energized and turned on, and the electrical locking of each curtain starts. As is well known, the mechanical locking was performed before the release button 4 was pressed, but the control is now switched to electric control. Thereafter, the aperture 26 of the lens 2 is controlled by a mechanism operation (not shown), and the reflection mirror in the photographing optical path is raised. Thereafter, the front curtain magnet is turned off. As a result, the leading curtain becomes running curve 3
The vehicle travels across the screen as indicated by 0.
The vehicle travels along a locus as shown in FIG.

At this time, since the slit forming blade of the front curtain passes just before the LED 10 and the PTR 11 during the traveling thereof, the output of the PTR 11 is inverted in the middle of the traveling curve 30 as shown at a timing 32 in FIG. I do.

Thereafter, the trailing curtain magnet is turned off after a lapse of a predetermined exposure time T '. This causes the trailing curtain to cross the screen as indicated by the running curve 31. Also at this time, since the trailing curtain passes just before the LED 10 and the PTR 11, the output of the PTR 11 is inverted at the middle of the running curve 31 as at timing 33, and returns to the original state.

As described above, by measuring the output pulse of the PTR 11 generated at each magnet operation timing, it is possible to know that the actual exposure time is t.

Here, T 'is the time during which the electric circuit described with reference to FIG. 2 controls each magnet, and is the control time corrected by the error obtained from the control result at the time of the previous photographing. For example, when the exposure value t obtained at the beginning (for example, immediately after shipment from the factory) is 1/1000 second, ie, 1 mS, and the obtained exposure time t is 1.2 mS, 1 mS is set as the ideal value T at the next photographing. To obtain the value, 0.8 mS obtained by subtracting 0.2 mS from the error is used as the control value T '. T ′ at this time is the storage circuit 2
8 is stored.

When the theoretical value T is obtained as the shutter time by the exposure calculation, the corresponding T 'stored in the storage circuit 28 is read, and the T' is used for actual control. Further, when there is a deviation from the ideal value T at the time of the next photographing, further corrected T ′ is calculated and stored in the storage circuit 28.

FIG. 4 shows a processing routine by the CPU 24 in FIG. In this routine, in order to simplify the description, only the part related to the shutter operation in the inspection process connected to the personal computer 20 will be described. This routine is repeatedly executed while power is supplied.

In step S1, a photometric signal and a sensitivity signal are fetched from the photometric means 40 and the sensitivity detecting means 41, respectively. In step S2, both the photometric signal and the sensitivity signal are calculated, and a shutter time and an aperture value, which are appropriate exposure conditions, are calculated. In step S3,
The exposure conditions and the like determined above are displayed on the LCD 5.
In step S4, it is determined via the switch detecting means 42 whether or not the shutter button 4 has been pressed. If not, the process returns to step S1 to repeat the above processing.

In step S5, the release button 4
Has been pressed, the first and second curtain magnets are first turned on as described with reference to FIG. In step S6, a reflection mirror (not shown) is raised to retract from the photographing optical path, and the aperture 26 is controlled to have a predetermined aperture.
In step S7, it is determined whether or not the apparatus is in the inspection process connected to the personal computer 20 by, for example, whether or not the apparatus is connected to the personal computer 20 via the cable 22 (cable 22).
Presence or absence). The operation mode is determined, and if it is an inspection process, the shutter control process B in step S9 is performed. If not, the shutter control process A in step S8 is performed in a normal state. Details of each will be described later.

In step S10, since the shutter control operation has been completed, the motor 27 is rotated to feed the film and to perform the urging operation of the mechanism. Since the exposure operation has completed one cycle, the process returns to step S1 to repeat the above processing.

FIG. 5 is a flowchart illustrating details of the normal shutter control processing routine (step S8).

In step S15, the shutter time T to be controlled obtained in step S2 is read. Step S
At 16, the corresponding control time T 'is read with reference to the storage circuit 28. In step S17, the current supply to the front curtain magnet is stopped, and the front curtain is driven. Thereafter, the processes of steps S18 to S20 and the process of step S19 are executed in parallel.

In step S18, the control time T 'is measured. In step S19, the exposure time t is measured. In step S20, since the timing of the control time T 'has been completed, the energization of the rear curtain magnet is stopped,
Run the second curtain.

In step S21, an error △ between the control time T ′ and the actual exposure time t is calculated. Step S
At 22, the control time T ′ is further corrected using the error △. In step S23, the control time T 'is stored in the storage circuit 28. Thereafter, step S1 in FIG.
Return to 0.

FIG. 6 is a flowchart for explaining the details of the shutter control routine (step S9) in the inspection step.

In step S25, the shutter time T to be controlled obtained in step S2 is read. Step S
At 26, the energization of the front curtain magnet is stopped and the front curtain is driven. In step S27, the control time T is measured. In step S28, since the measurement of the control time T has been completed, the energization of the rear curtain magnet is stopped, and the rear curtain runs. Thereafter, the process returns to step S10 in FIG.

As described above, the operation of the automatic shutter correction mechanism is permitted or prohibited according to the situation.
Only the original (uncorrected) operation state of the shutter can be confirmed.

In this embodiment, the example in which the operation of the correction circuit is prohibited in the inspection adjustment process of the shutter has been described. However, a switching means may be provided in the camera itself so that the photographer himself can make a selection. Further, in the present embodiment, the correction circuit introduced to the shutter of the camera has been described. However, the present invention is not limited to this and can be applied to a lens aperture. Further, the present invention can be applied not only to a still camera, but also to other devices provided with a mechanism part having a possibility of potentially changing and a correction circuit therefor.

[0039]

As described above, according to the mechanism device provided with the operation monitor of the present invention, the mode for controlling the operation means based on the monitoring result of the monitoring means, and the operation means regardless of the monitoring result of the monitoring means. Is selected by the selection means (22), so that the circuit for automatically correcting the fluctuation of the shutter is operated in the case of normal photographing, and the shutter of the camera is adjusted in the inspection adjustment step. In such a case, since the correction mechanism can be set to the non-operation state, it is possible to check the operation reflecting the effect of the adjustment.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a mechanism device provided with an operation monitor according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a mechanism device having an operation monitor according to the present invention.

FIG. 3 is a timing chart showing an embodiment of a mechanism device provided with an operation monitor according to the present invention.

FIG. 4 is a flowchart showing an embodiment of a mechanism device having an operation monitor according to the present invention.

FIG. 5 is a flowchart showing an embodiment of a mechanism device having an operation monitor according to the present invention.

FIG. 6 is a flowchart showing one embodiment of a mechanism device provided with an operation monitor according to the present invention.

[Explanation of symbols]

 1 camera 7 shutter 10 LED 11 PTR 20 personal computer 24 CPU

Claims (3)

[Claims] A mechanism for operating the mechanism; a monitor for monitoring the operation of the mechanism; a mode for controlling the operation based on a monitoring result of the monitor; A mechanism device comprising an operation monitor, comprising: control means having a mode for controlling the operation means irrespective of a monitoring result of the monitor means; and selection means for selecting a mode of the control means. 2. The mechanism device according to claim 1, wherein said mechanism means is a shutter of a camera. 3. The mechanism device according to claim 1, wherein said mechanism means is a lens stop of a camera.