JPH0263036A - Motor driving camera - Google Patents

Abstract

PURPOSE:To always perform an appropriate action in response to the condition of a power source battery and to a change in the load of film, etc., by providing an operating means with a means detecting the termination of actions, permitting a control means to measure the operating time of the operating means and selecting the operational sequence of plural motors. CONSTITUTION:The camera is provided with the control means 70 which controls the sequence to drive plural motors 1, 20 and 50 by outputting a control signal to a driving circuit 76. At least one operating means includes a detecting means detecting the termination of actions, and the control means 70 includes a timer means counting the operational time when the motors drive the operating means after they are energized. If the operating time before the termination signal is inputted is less than a prescribed value, the sequence to simultaneously drive specific combinations of the motors 1, 20 and 50 is executed, whereas if the operating time exceeds the prescribed value, the sequence to drive at least one combination of the motors in order is executed. Thus such a camera can be accomplished that has less transmission loss and can switch and operate the sequence to drive plural motors in order even when large load is applied to an operating mechanism.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a motor-driven camera, specifically, a camera with a film winding operation, a shutter charging operation, a movable mirror displacement operation, an aperture driving operation of an aperture mechanism, etc. This invention relates to a motor-driven camera in which each of the following operations is performed by a plurality of dedicated motors.

[Prior Art] Recent cameras have become increasingly electric, and even in eye reflex cameras, each camera operation, such as film winding, shutter charging, and mirror displacement, is automatically performed by a built-in motor. It is now possible to

This motor-driven camera was invented in Japanese Patent Application Publication No. 5
As disclosed in Japanese Patent Publication No. 3-141615, a single motor built into a camera performs film winding operation and shutter charging operation at the same time, and Japanese Patent Application Laid-open No. 194433/1982 As shown, two reduction gear trains are provided for one motor, and the direction of rotation of the motor is switched depending on the state of the power supply battery and the load, thereby selecting the reduction gear train and winding the film. The film winding operation and the shutter charging operation are each performed by independent motors, as disclosed in Japanese Patent Laid-Open No. 60-254028. something is already known.

Furthermore, as disclosed in Japanese Patent Application Laid-open No. 57-195230, there is a system in which the operation sequence of multiple actuators is different depending on whether only a built-in power source is used or when an external power source is connected. As disclosed in Japanese Patent Publication No. 129533/1982, there has already been a method in which the operating sequence of a motor for driving a charge such as a shutter diaphragm mechanism and a motor for feeding a film are made to differ based on the film feeding state. 15 known.

[Problems to be Solved by the Invention] However, the above-mentioned Japanese Patent Application Laid-Open No. 53-141615. When adopting the method shown in the publication in which large loads such as film winding and shirt loading are simultaneously driven by one motor, high-speed drive is required, which increases the consumption of the remoter, which requires a large output from the motor. Electric power becomes large. If the power supply battery used as a power source here is new or the operating environment temperature is high, it can supply sufficient power, but if the battery is already consumed to some extent or its performance deteriorates at low temperatures, If the internal resistance of the battery increases, sufficient power cannot be supplied. As a result, there is a drawback that the number of films that can be shot decreases unless the battery is replaced.

Therefore, in order to solve such problems, the above-mentioned Japanese Patent Application Laid-Open No. 60-194433 and Japanese Patent Application Laid-open No. 60-25402 have been proposed.
If a method of providing two gear trains for one motor as shown in Publication No. 8 is adopted, high-speed drive is achieved when the battery is new and the load is small, but the battery deterioration and load increase. Even in such a case, operation is possible by switching the gear train. However, on the other hand, providing two series of gears for each motor has the disadvantage that the camera inevitably becomes larger.

On the other hand, the above-mentioned Japanese Patent Application Laid-Open No. 57-195230 discloses a method of varying the operation sequence of a plurality of actuators depending on the type of power source. It becomes necessary to connect the camera, which leads to an increase in the size of the camera.

In order to solve this drawback, there is a means proposed in the above-mentioned Japanese Utility Model Application Publication No. 129533/1983. By adopting this method, high-speed drive can be achieved when the film load is small or the battery performance has not deteriorated, and when the film load is large or the battery performance has deteriorated, the film feeding speed can be detected. Since the operating sequences are different between the two, normal operation of the camera is possible.

However, when using this method, a means for detecting and calculating the film feeding speed is required, which leads to an increase in the size of the Yabari camera, and it is difficult to control and drive multiple actuators simultaneously to adjust the speed. The disadvantage is that the circuit becomes complex because of the need for detection.

Additionally, in order to improve the energy efficiency of each camera operating mechanism, it is effective to eliminate mechanical transmission members and use independent actuators for the film winding mechanism, movable mirror operating mechanism, and aperture drive mechanism. be. However, if high-speed drive is pursued using this method, the full power output of the power battery is required even during the camera's pre-exposure operations (aperture drive and movable mirror drive). In that case, it would be effective to switch the actuator operation sequence even in the pre-exposure operation to prevent battery deterioration, but this has not yet been proposed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor-driven camera which can overcome the above-mentioned drawbacks and which can always operate properly in response to changes in the state of the power supply battery and the load such as film.

[Means and effects for solving the problems] The motor-driven camera according to the present invention independently drives each operating means of the camera, such as a film winding means, a shutter charging means, a movable mirror driving means, and an aperture driving means. A motor-driven camera comprising a plurality of motors, a drive circuit that supplies power from a power supply battery to the plurality of motors, and a control means for controlling the drive circuit, wherein at least one of the actuation means The two actuating means have a detecting means for detecting the end of the operation, and the control means has a timer means for measuring the operating time from the start of energization to the motor that drives the actuating means. The present invention is characterized in that the means selects the operation sequence of the plurality of motors by totaling the operation time of the operation means n1.

[Embodiment] Figure 1 shows only the main parts of the mechanism of a motor-driven camera to which the present invention is applied, and the camera is a single-lens reflex camera that uses a longitudinal focal-brain shutter. It is made up of. In FIG. 1, light transmitted through a photographic lens (not shown) attached to the camera body enters the camera body, and a movable reflection mirror 15 is installed diagonally at an angle of 45 @ on the photographic optical axis O. The light is reflected upward by the light beam, and is transmitted and diffused to the focusing screen 42. The optical image on the focusing screen 42 is observed as an erect image in the finder through a pentaprism 43 and an eyepiece 44.

The motor 50 is a stepping motor that performs an aperture control operation, and a drive gear 55 is fixed to its rotating shaft. The aperture case 51, which is a short cylindrical body having a donut-shaped bottom wall, has a plurality of support pins 51 on its bottom wall 51e.
a (only one is shown in the figure) are installed at equal intervals in the optical axis direction, and each support pin 51a has an aperture blade 52.
(only the leaves are shown) are rotatably pivoted through support holes 52a bored in their bases.

Each aperture blade 52 has a driving pin 52b fixedly planted in the optical axis direction at a position near the base thereof.
are respectively fitted into driving cam slots 53a (only one is shown in the figure) formed in a narrowing member 53 consisting of a arrow wheel in correspondence with the number of blades. As is well known, the aperture member 53 is made of a donut-shaped plate, and is fitted into the aperture case 51 so as to be rotatable around the optical axis O.
A sector gear 53b for driving is protruded from a part of the outer periphery. This sector gear 53b is connected to the case 5 mentioned above.
The sector gear 53b is fitted into a notch 51c provided in the peripheral wall of the sector gear 53b, and the notch 51c is formed in a size that allows the sector gear 53b to rotate through a necessary angle. Further, the sector gear 53b meshes with the drive gear 55.

The diaphragm member 53 is prevented from being removed by a C ring 54 fitted into a circumferential groove 51b formed near the front of the inner surface of the peripheral wall of the diaphragm case 51, thereby restricting its movement in the optical axis direction. This C-ring 54 has protrusions 54c formed at both ends thereof, and both protrusions 54c abut on both ends 51d of the notch 51c of the case 51, so that the C-ring 54 is held against the case 51. It is fitted to prevent it from rotating. Further, a pin 60 for stopping rotation is installed in the narrowing member 53 in the optical axis direction,
The pin 60 includes stoppers 54a and 5 for regulating the rotation range, which are formed of protrusions that protrude inward from the C-ring 54.
4b.

That is, if the rotating shaft of the motor 50 rotates in the direction of arrow C,
The aperture member 53 rotates in the direction of the arrow with respect to the aperture case 51, and the aperture diameter by the aperture blades 52 becomes smaller.
The aperture device is set to be in the minimum aperture state when the pin 60 abuts against the stopper 54b. Further, when the rotating shaft of the motor 50 rotates in the direction of arrow B, the diaphragm member 53 rotates in the direction of arrow B, the aperture diameter increases, and when the pin 60 abuts against the stopper 54a, the diaphragm device is in an open state. It is set so that

A pin 53c for switching the switch is installed in the optical axis direction in the aperture member 53, and the pin 53c is connected to the aperture open switch SWs only in the aperture open state by the rotation of the aperture member 53. pieces 56a and 56b
is set so that it is in a conductive state.

Although only one support pin 51a, driving cam slot 53a, and aperture blade 52 are shown in FIG. 1, there are actually 5 to 7 of them around the optical axis O.
) will be arranged. Further, the driving cam slot 53a is formed in a cam shape such that when the narrowing member 53 rotates, for example, 6 inches, the F No. becomes darker by - steps, and the aperture diameter is about 8 steps at maximum (that is, the narrowing member 53 The rotation angle is 4g").

In the aperture device configured as described above, the aperture case 51 is integrally attached to the fixed frame 61 of the lens barrel.

On the other hand, a motor 1 is a motor that performs a shutter charging operation and a mirror driving operation, and an output gear 2 consisting of a pinion gear is fixed to its rotating shaft. The transmission gears 3 and 4 are composed of stage gears with different diameters,
The rotational force of the output gear 2 is decelerated and transmitted to the intermediate gear 5.

A cam drive gear 6 meshing with this gear 5 includes a plate cam 6a for driving a mirror and a plate cam 6 for shutter charging.
b is integrally attached, and a conductive contact piece 7 that rotates and slides on the substrate 8 is attached to the lower surface thereof. A first drive lever 9 is disposed near the plate cam 6a so as to be rotatable about a support shaft 9a, and its arm end slides on the cam surface of the plate cam 6a for driving the mirror. Moving small roller 9
Four small rollers 9C are rotatably attached to the end of the other arm. Further, a mirror drive lever 11 is provided near the movable reflecting mirror 15 so as to be rotatable about a support shaft 11a, and a pin 11b that comes into contact with the small roller 9C is fixed to the lower end of the mirror drive lever 11. The movable reflection mirror 15 is installed obliquely on the photographing optical axis O so as to be able to rotate upward about the support shaft 15a.
The mirror is urged downward by a mirror lowering spring 16 stretched between it and a stationary member (not shown), and is in contact with a mirror positioning pin 17 in the viewfinder observation state.

When the mirror drive lever 11 rotates clockwise around the support shaft 11a, its upper end 11C is attached to a pin 15b fixed to the upper side of the movable reflective mirror 15.
, thereby raising the mirror 15.

Further, a second drive lever 10 is provided near the plate cam 6b so as to be rotatable around a support shaft 10a, and at one arm end of the lever 10, the plate cam 6 for charging the shutter is provided.
A small roller 10b that slides on the cam surface of b is rotatably attached, and a small roller 10c is also rotatably attached to the end of the other arm. A shutter charge lever 12 is provided near the mirror 15 so as to be rotatable about a support shaft 12a, and a pin 12b that comes into contact with the small roller 10c is fixed to the lower end of the shutter charge lever 12. Also, a connecting pin 12c is fixed to the upper end of this lever 12. Furthermore, a weak spring 18 is stretched between the lever 12 and a stationary member (not shown), giving it the ability to rotate counterclockwise.

A known vertically running focal plane shutter 13 is disposed behind the movable reflective mirror 15. When the lever 12 rotates clockwise against the elasticity of the spring 18, the pin 12C Shutter charge member 14
This pushes up the pin 14a, which is fixed to the pin 14a, thereby charging the shutter.

On the other hand, a motor 20 for winding the film is disposed within the film take-up spool 26, and an output gear 21 consisting of a pinion gear is fixed to the rotating shaft of the motor 20. The transmission gears 22, 23, and 24 are each composed of stage gears with different diameters, and transmit the rotation of the output gear 21 to the intermediate gear 25 by decelerating the rotation. This intermediate gear 25 meshes with a drive gear 26a provided on the spool 26. Also, spool 26
A plurality of locking claws 26b are provided on the outer periphery of the spool 26, and the perforations of the film 31 are caught by the rotation of the spool 26 to wind up the film 31. The driven sprocket shaft 27 has well-known engaging claws 27a and 27b that engage with the perforations of the film 31,
It has a gear 27c at the upper end and rotates in synchronization with the movement of the film 31. A conductive contact piece 29 that rotates and slides on the substrate 30 is integrally attached to the lower surface of the gear 28 that meshes with the gear 27c.

FIG. 2 is an enlarged view showing the operation of the plate cams 6a and 6b integrally attached to the cam drive gear 6,
FIG. 2(A) shows the finder observation state before release, and FIG. 2(B) shows the state when the movable reflection mirror 15 is raised and exposure operation is possible.

In FIG. 2(^), the first drive lever 9 is rotating clockwise due to the tension of the mirror lowering spring 16, and the small roller 9b is in contact with the bottom dead center of the mirror drive plate cam 6a. There is. In this state, the movable reflection mirror 15 is placed in a viewfinder observation state.

On the other hand, the second drive lever 10 rotates counterclockwise due to the small roller 10b contacting the top dead center of the plate cam 6b for shutter charging, thereby maintaining the shutter charging completed state.

Here, when the cam drive gear 6 rotates in the direction of the arrow due to the release operation, each of the levers 9, 10, 11, 12 is rotated in the direction of the arrow by the plate cams 6a and 6b, and as a result, as shown in FIG. ). Here small roller 9
b is in contact with the top dead center of the mirror drive plate cam 6a,
In this state, the movable reflective mirror 15 is raised against the elasticity of the mirror lowering spring 16, and is ready for photographing.

On the other hand, the second drive lever 10 is rotated clockwise by the tension of the spring 18, and the small roller 10b is in contact with the bottom dead center of the plate cam 6b for shutter charging. In this state, the shutter 13 is placed in a travelable state. At this point, the shutter is activated, and after the shutter blade has completed its travel, the cam drive gear 6 further rotates in the direction of the arrow, as shown in Fig. 2 (B
), each lever 9. is moved by the plate cams 6a, 6b.
10°, 11, and 12 rotate in the directions of arrows, and as a result, the shutter 13 is charged and the movable reflection mirror 1
5 is performed to reach the state shown in FIG. 2(A).

FIG. 3 is a diagram showing details of the conductive contact piece 7 and the board 8 attached to the cam drive gear 6. As shown in FIG.

An annular conductive pattern 8a and a partial arc-shaped conductive pattern 8b are provided on the substrate 8, and each conductive pattern is led to a control circuit 70 (CPU) as shown in FIG. The conductive contact piece 7 has its tip divided into two prongs,
Each tip is adapted to slide into contact with each conductive pattern on the substrate 8, and one of the tips 7a is constantly in contact with the conductive pattern 8a as the gear 6 rotates.

Further, the other end 7b of the conductive contact piece 7 is configured to come into contact with the conductive pattern 8b when the shutter charging is completed, and the contact with the pattern 8b is cut off when the movable reflection mirror 15 completes rising. FIG. 3(A) shows the viewfinder observation state before release, and the conductive patterns 8a and 8b are in a conductive state by the conductive contact piece 7. FIG. 3 (13) shows a state in which the movable reflection mirror 15 is raised and exposure operation is possible.

FIG. 4 is a diagram showing details of the conductive contact piece 29 and the board 30 attached to the gear 28.

This conductive contact piece 29 is also divided into two at its tip,
The respective tips 29a and 29b are in sliding contact with the respective conductive patterns 30a and 30b on the substrate 30. That is, one tip 29a is always in contact with the annular conductive pattern 30a, and the other tip 29b is in contact with the terminals of the conductive pattern 30b, which has conductive terminals extending in the radial direction at regular angles. It is arranged so that Further, the conductive patterns 30a and 30b are led to a control circuit 70 (CPU) shown in FIG.

FIG. 5 shows the configuration of the electric circuit of this camera.

The sequence control circuit 70 is a CPU and has an internal A/D converter. The CPU 70 includes a film sensitivity setting means 71 for reading the DX code of the film cartridge, and a photometry means 72 provided in the finder optical system.
, open aperture value detection means 73 are connected, and each transmits to the CPU 70 a BV value which is film sensitivity information, a BV value which is subject brightness information, and an A which is open aperture value information.
Output the vO value. Further, the release 5W74 is a SW for the photographer to start the photographing operation, and the CPU 70 inputs the on/off signal of this 5W74 from the CI8 input terminal.

A dummy load 75 is operated when a battery check is performed, and is composed of a switching transistor 84 and a resistor 83.

When performing a battery check, it is possible to perform a more accurate battery check by applying a dummy load close to the actual load such as when driving a motor, rather than checking the open circuit voltage of the power supply battery. Therefore 1. This is a dummy load for that purpose.

Reference numeral 76 denotes a motor drive circuit, which is comprised of a circuit that drives the motor 1, motor 20, and stepping motor 50. Also, the symbols 86° and 88 are motor 1, respectively.
．． This is a switching transistor for driving 20. And codes 85 and 87 are motors 1 and 20, respectively.
This is a switching transistor for applying a short brake. Reference numerals 89 to 96 indicate switching transistors for driving the stepping motor 50. Reference numeral 77 indicates motor 1, 20° stepping motor 50. This is a power supply for supplying power to dummy loads, sequence control circuits, etc.

Further, reference numeral 78 is a low-pass filter, which is composed of a resistor 97 and a capacitor 98.

Is this low pass filter 78 electric? fi, has the function of removing noise on the voltage. A terminal C15 of the CPU 70 is an A/D conversion input port, and inputs the output of the low-pass filter 78 and performs A/D conversion.

That is, the CPU 70 is able to know the value of the power supply voltage from the result of this A/D conversion. code 1
Reference numeral 3 represents the longitudinal-travel focal plane shutter, and reference numeral 79 represents a shutter drive circuit. The CPU 70 outputs a control signal to the shutter drive circuit 79 based on the calculated shutter speed information TV value. Further, reference numeral 80 indicates the conductive contact piece 7 and the conductive pattern 8a.

8b (see FIG. 4). Reference numeral 81 denotes a film feeding state detection switch SW2 (see FIG. 5), which is composed of the conductive contact piece 29 and conductive patterns 30a and 30b.

Further, reference numeral 82 denotes an aperture opening switch SW3 (see FIG. 2) consisting of the conductive contact pieces 56a and 56b. The on/off states of the switches SW-8W3 of 80, 81.82 are input to the input terminals C18, C17, and C16 of the CPU 70, respectively, while the reference numeral 112 indicates the aperture value which is the calculated exposure information. This is a display means for displaying the shutter speed, battery check results, etc., and in this embodiment, an LCD (liquid crystal display element) is used. Note that the LCD drive circuit is C
Built into PU70.

Further, the CPU 70 is capable of performing all sequence control of the main camera other than the control described above.

Next, the operation of the first embodiment of the motor-driven camera configured as described above to which the present invention is applied will be explained using the flowcharts shown in FIGS. 6 to 9.

FIG. 6 is a schematic flowchart. First #100.
When the release 5W74 is turned on, the CPU 70
detects the ON state from terminal C1 and enters the battery check sequence #101.

In the battery check sequence, the CPU 70 sets the terminal C2 to the "H" level and turns on the dummy load 75. After a certain period of time, the power supply voltage applied to the terminal C15 is A/D converted.

After the A/D conversion is completed, the CPU 70 sets the terminal C2 to "L" level to turn off the dummy load.

Based on the AID conversion result of the power supply voltage, the CPU 70 determines that it is impossible to continue the following photographing sequence when the power supply voltage is lower than a predetermined threshold, displays battery NG on the display means 112, and changes the release lock state. Make it.

Further, if the power supply voltage is higher than a predetermined threshold value, it is determined that it is possible to continue the imaging sequence, and the process moves to the following sequence.

Next, in #102, the CPU 70 controls the film sensitivity setting means 7.
From the output of 1, the SV value, which is film sensitivity information, is input.

Next, in #103, the CPU 70 detects the open aperture value detection means 73.
The AVO value, which is open aperture value information, is input from the output of .

Next, in #104, the CPU 70 inputs the BV value, which is the brightness information of the subject, from the output of the photometer 72.

Next, in #105, the CPU 70 performs a predetermined program calculation based on the SV value, AVO value, and BV value manually inputted in the previous sequence, and calculates the aperture value AV value and the number of stops Δ.
The AV value and shutter time TV value are calculated.

Next, in #106, the CPU 70 performs a mirror raising and aperture driving sequence. Although the details of this sequence will be described later, the movable reflection mirror 15 is moved from the finder observation state to the photographing possible position, and the CPU 7
The aperture narrowing down operation is performed in accordance with the aperture stage number ΔAV value calculated as zero.

Next, in #107, the shutter is driven. The CPU 70 outputs a control signal to the shutter drive circuit 79 based on the calculated shutter time TV value to drive the shutter 13.

Next, in #108, a sequence of lowering the mirror, charging the shutter, and opening the aperture is performed. Although details of this sequence will be described later, the aperture is returned to the open state, the movable reflection mirror 15 is returned to the finder observation state, and the shutter 13 is charged.

Next, in step #109, the sequence of lowering the mirror, charging the shutter, and winding the film is performed. Although the operation of opening the aperture has been completed in the previous sequence, the operations of lowering the mirror and charging the shutter are still in progress, so the winding of the film 31 is started when the operation of opening the aperture is completed. Details of this sequence will also be described later. and,
When the movable reflection mirror 15 returns to the viewfinder observation state, the charging of the shutter 13 is completed, and the winding of one frame of film 31 is completed, the photographing sequence ends.

Next, the sequence of mirror raising and aperture driving will be explained in detail. First, the operation of the mechanism is such that in the viewfinder observation state shown in FIG.
It is in contact with the stopper 54a of the ring 54, and the aperture blade 52 is in an open state. Here motor drive circuit 7
6 sequentially applies voltage to the stepping motor 50 so that the output shaft rotates in the direction of arrow C, the rotation of the stepping motor 50 is transferred from the drive gear 55 to the sector gear 53b.
In order to rotate the aperture member 53 in the direction of arrow A, the aperture blades 52 operate in the aperture direction. At this time, the aperture opening switch SW3 changes from ON to OFF state. Then, the stepping motor 50 rotates by the number of steps corresponding to the number of aperture stages ΔAV calculated by the CPU 70, thereby controlling the aperture to an appropriate aperture diameter. On the other hand, by rotating the rotating shaft of the motor 1 clockwise, the output gear 2 and the gear 3°4.5.6 rotate in the directions of the arrows, respectively. As a result, the shutter 13 is released from the charged state and becomes ready for travel, and the movable reflective mirror 15 rises. Then, when the mirror is completely raised by the rotation of the cam drive gear 6, the conductive pattern 8b between the conductive contact piece 7 and the plate 8 becomes non-conductive (see FIG. 3(B)), so that the CPU 70 stops the motor 1.

The mechanism that operates as described above is operated in a sequence based on the flowchart shown in FIG.

The outline of this flowchart is to simultaneously drive the mirror drive motor 1 and the aperture drive stepping motor 50,
And measure the time from the start of motor 1 drive
, when the mirror raising is completed within a predetermined time (t, m5ec), it is determined that the performance of the power supply battery has not deteriorated, and the operation sequence continues as it is. If the mirror does not rise completely within a predetermined time (tlmsec), it is determined that sufficient drive is not possible due to deterioration in the performance of the power supply battery, and the drive of the motor 50 is immediately stopped, and the motor 1. By sequentially driving the motors 50 in this order, the load on the ISr battery is reduced, the voltage drop is kept to a minimum, and the camera can be driven. When the sequence further shifts to sequential drive, the A flag (a flag for selecting sequential drive control in the subsequent mirror drive and aperture drive sequence) is set, and the aperture drive stepping motor 50 steps out of step. Therefore, after the mirror has been raised, the -degree diaphragm is returned to the open state and the aperture control is performed again. Further, when the A flag is already set when this flowchart is executed, the motor 1 and the motor 50 are sequentially driven from the beginning.

Next, the flowchart shown in FIG. 7 will be explained in detail. First, in #120, the CPU 70 sets the output terminal C4 to "H" level, turns on the transistor 86, and turns on the motor 1. Next, in #121, determine the set state of the A flag,
If it has not been set, start the t1m5ec timer in #122. Next, CPU70 in #123
outputs pulses from output terminals C7 to C14 in a predetermined order. As a result, the transistors 89 to 96 for driving the stepping motor are set to 0N in the prescribed order.
10FF is repeated, and as a result, the spinning motor 50 is driven in the direction of arrow C. Next, in #124, tlmsec
Determine whether the timer has timed up, and if the timer has not timed up, in #125, the CPU 70 monitors SWl 0N10FF from input terminal C18, and if it is in the ON state, determines that the mirror is still in the process of rising. .

Next, in #126, it is determined whether the number of pulses of the stepping motor 50 has reached the scheduled number, and if it has not reached the scheduled number, the process returns to #124. If the state of SWl switches from ON to OFF while repeating the loop from #124 to #126, it is determined that the mirror has been raised, and
0, output terminal C4 is set to “L” level and motor 1 is set to 0F.
FL, then in #141, the output terminal C3 is set to "L" level, the transistor 85 is turned on, and the motor 1 is suddenly braked due to the short circuit.

Next, in #142, the stepping motor is driven until the number of pulses of the stepping motor 50 reaches the predetermined number,
When the scheduled number is reached, the stepping motor 50 is turned off in #143. Next, after a timer of 30 m5ec passes in #144, the motor 1 is turned off in #145. This timer is for ensuring the braking time of the motor 1. Next, in #146, the tlmsec timer is reset, and this sequence ends.

Further, when the number of pulses of the stepping motor 50 reaches the predetermined number while repeating the loop of #124 to #126, it is determined that narrowing down has been completed, and the stepping motor 50 is turned off in #127. Next, at #128, t
Determine whether the lmsec timer has timed up,
If the time is not up, set sw to 0 in #129.
Monitor N10FF and repeat the loop from #128 to #129 until it changes from ON to OFF. And OFF
When it reaches #130, turn off motor 1 and #13
At step 1, a sudden brake is applied to motor 1 and the process moves to #144.

On the other hand, while repeating the loop from #124 to #126, if t, m5cc elapse and the tlmsec timer times up, it is determined that normal operation is not being performed due to deterioration of the power battery, and the process returns to #150. The motor 50 is set to 0FFL, and only the motor 1 is rotated. Next #15
The A flag is set for sequentially selecting drive control in the sequence of mirror drive and aperture drive after 1st. Next, turn off motor 1 when the mirror lift is completed in #152 to #154.
After F, apply the brakes suddenly. Next, in #155, the stepping motor 50 is rotated in the direction of the arrow.
U70 outputs pulses from output terminals c7 to C14 in a predetermined order. Next, in #156, the CPU 70 monitors 0N10FF of 8w3 from input terminal C16,
When the aperture is opened and SW3 changes from OFF to ON (details will be described later), step #157 turns the motor 50 to 0FFL, step #158 starts driving the stepping motor 50 again in the direction of arrow C, and moves to #142. do. Also,
Even if the tlmsec timer times up in the loop from #128 to #129, it is determined that both motors are not operating normally due to deterioration of the power battery, and #
The flow continues to 151.

On the other hand, if the A flag is set in #120 because sequential drive was selected in the previous shooting, #
At steps 160 to #163, the drive of the motor 50 is started after waiting for the end of the drive of the motor 1, and the process moves to #1.42, where drive control is sequentially executed.

Next, the sequence of lowering the mirror, charging the shutter, and opening the aperture will be explained in detail.

First, the mechanism shown in FIGS. 1 to 3 operates by rotating the stepping motor 50 in the direction of the arrow when the aperture device in the lens barrel is in the aperture state.
3 rotates in the direction of arrow B, and the aperture blades 52 are opened. When the pin 60 implanted in the diaphragm member 53 comes into contact with the stopper 54a of the C ring 54, the diaphragm opening switch SW3 changes from OFF to ON state, and the CP
U70 detects that the aperture is opened.

On the other hand, by rotating the motor 1 clockwise again from the mirror raised state, the output gears 2, 3, 4.
5 and 6 each rotate in the direction of the arrow, and the movable reflection mirror 1
5 is lowered, and the charging operation of the shutter 13 is started.

The mechanism that operates as described above is operated in a sequence of ≦ based on the flowchart shown in FIG. First, in #170, the CPU 70 outputs pulses from the output terminals 07 to C14 in a predetermined order so as to rotate the stepping motor 50 in the D direction. Next, in step #171, the set state of the A flag is determined to see if sequential drive was selected in the previous flowchart. If the A flag is not set, the motor 1 is turned ON in step #172, and the motor 1 and the motor 50 are simultaneously driven. Next, when it is detected in #173 that the aperture is in an open state, the motor 50 is turned to 0FFL in #174, and this sequence ends.

Note that the time required for lowering the mirror and charging the shutter is longer than the time required for opening the aperture, so when the opening operation of the aperture is completed, the mirror lowering and shutter charging operation is still in progress.

On the other hand, if the A flag is set due to deterioration of the power supply battery, in steps #180 to #182, after completing the aperture opening operation, sequential drive control is executed in which motor 1 is turned ON and mirror lowering and shutter charging are started. do.

Next, the sequence of mirror lowering, shutter charging, and film winding will be explained in detail. First, the mechanism shown in FIGS. 1 to 4 rotates the rotating shaft of the film winding motor 20 clockwise. Then, output gear 21° gear 22, 23, 24, 25,
26a and spool 26 each rotate in the direction of the arrow. As a result, the film 31 is wound onto the spool 26, and the driven sprocket shaft 27 is moved around the film 31.
It rotates in the direction of the arrow as it travels. Due to the rotation of the driven sprocket shaft 27, the gear 28 rotates in the direction of the arrow.
When the conductive contact piece 29 slides on the substrate 30, the film 3
1, the conductive patterns 30a and 30b repeat the conductive state and non-conductive state. Thereby, the CPU 70 detects the feeding amount of the film 31. And conduction pattern 3
When the number of pulse signals due to changes in conduction and non-conduction between 0a and 30b reaches the number corresponding to the number of film frames, the CPU 70
stops the rotation of the motor 20 and completes film winding. Furthermore, when the charging of the shutter 13 due to the rotation of the motor 1 is completed, the conductive contact piece 7 and the conductive pattern 8b of the substrate 8 become electrically connected, and the CPU 70 stops the rotation of the motor 1. Then, when both motors 1.20 stop, the series of photographing operations for one frame is completed, and the photographing operation for the next frame is ready.

The mechanism that operates as described above is operated in a sequence based on the flowchart shown in FIG. The outline of this flowchart is to simultaneously drive the mirror drive and shutter charge motor 1 and the film winding motor 20, measure the time from the start of driving the motor 20, and perform the shutter charge operation within a predetermined time (t2msec). Alternatively, when the film winding operation is completed, it is determined that the performance of the power supply battery has not deteriorated and the film load is not large, and the operation sequence continues as it is.

In addition, if neither the shutter charging operation nor the film winding operation is completed within a predetermined time (t, m5ec), it is determined that the performance of the power supply battery has deteriorated or the film load is large.
The drive of the motor 20 is immediately stopped, and the motor 1. motor 2
By sequentially driving in the order of 0, the load on the power battery is reduced, the voltage drop is kept to a minimum, and the camera can be driven. If the sequence moves further to sequential driving, flag B (flag for selecting sequential driving in the next shutter charging and film winding sequence)
Set. Furthermore, if the B flag has already been set when this flowchart is executed, motor 1 and motor 20 are sequentially driven from the beginning.

Next, the flowchart shown in FIG. 9 will be explained in detail. First, in #189, the CPU 70 initializes the count value of the pulse counter of SW2, and then starts counting. This counter is provided so as to count up when a uniform number of pulses on the film have been manually applied. Next, in #190, it is determined whether the B flag is set, and if it is not set, in #191, the CPU 70 outputs the output terminal C.
6 to "H" level to turn on the transistor 88,
Turn on the motor 20. Next at #192 t m5e
Start the timer c. Next, t2m at #193
It is determined whether the timer of sec has timed up, and if the timer has not timed up, in #194, the CPU 70 monitors 0N10FF of swl from the input terminal C1B,
If it is in the OFF state, it is determined that the mirror is still in the middle of lowering or shutter charging. Next, in #195, the CPU 70 determines whether the count value of the pulse counter that counts the pulse signal from SW2 manually input from the input terminal C17 has reached a predetermined number, and if it has not reached the predetermined number, the Make a judgment and return to #193. While repeating the above loop, when the count value of the pulse counter of SW2 reaches a predetermined number, it is determined that the -equal film winding has been completed, and in #196, the CPU 70 sets the output terminal C6 to "L". level and motor 20 to 0FF
Then, in #197, the output terminal C5 is set to the "L" level, turning on the transistor 87, and applying a sudden brake to the motor 20 due to the short circuit. Next, swl at #198
0N10FF is monitored, and when it changes to the ON state, it is determined that the mirror lowering and shutter charging are complete, and #19
At step 9, the CPU 70 turns off motor 1, and then turns off motor #2.
At 00, a sudden brake is applied to motor 1 due to a short circuit.

Next, after passing through a 30 m sec timer in #201,
In #202 and #203, motor 1 and motor 20 are turned off. This timer is used to ensure braking time for motor 1 and motor 20. Next, at #204, t 2 m
sec timer is reset, and this sequence ends. Also, while repeating the loop from #193 to #195, the state of SWl changes from OFF to ON.
If it changes to , it is judged that mirror lowering and shutter charging are completed, and motor 1 is turned off at #210, and motor 1 is turned off at #2.
At +1, sudden braking is applied to motor l due to a short circuit.

Next, monitor the pulse counter of SW2 in #212,
When the count up is reached, it is determined that the winding is complete, and #21
At step 3, the motor 20 is set to 0FFL, at step #214 a sudden brake is applied due to a short circuit, and the program moves to step #201.

Also, if the t2mSCC timer times up while repeating the loop from #193 to #195, it is determined that the power supply battery has deteriorated or the film load is large, and the next shutter charge and film winding are performed in #220. The B flag for selecting sequential drive is set in this sequence, and the motor 20 is temporarily turned off in #221. Next, in #222, monitor the status of sw, and turn it from OFF to OFF.
When the state changes to N, it is judged that the mirror lowering and the shutter charge are completed, and the motor 1 is set to 0FFL using #223.
Apply sudden brake due to short circuit at #224. Then, in #225, the motor 20 is turned on again to restart the winding operation, and the process moves to #212.

On the other hand, in #190, if the B flag is set because sequential drive was selected in the previous shooting,
In steps #230 to #233, the drive of the motor 20 is started after waiting for the end of the drive of the motor 1, and sequential drive control is executed continuing to #212.

In this embodiment, the A flag and B flag may be reset when a power switch (not shown) is turned off or when a power source battery is replaced.

Furthermore, in this embodiment, the drive sequence is determined to be switched independently for the sequence of raising the mirror and stopping down, and the sequence of lowering the mirror, charging the shutter, and winding the film. Of course, when the sequence is switched to sequential drive control, sequential drive control may be performed for all other sequences thereafter.

Furthermore, the present invention may also be implemented by measuring the time required for the mirror to rise in the sequence of raising the mirror and narrowing down the aperture, determining the measured time at a plurality of judgment levels, and selecting the subsequent driving method according to the level. This does not deviate from the gist.

[Effects of the Invention] As described above, according to the present invention, each operating means of the camera is driven by an independent motor, thereby realizing a camera with low transmission loss and high energy efficiency, and also ensuring that the power supply battery is in sufficient condition. If power is available or the load on the operating mechanism is small, high-speed drive is possible to drive multiple motors simultaneously, and if the power supply battery is in a state of excessive consumption or has deteriorated due to a drop in temperature. Furthermore, even when the load on the operating mechanism is large, it is possible to provide a motor-driven camera that can operate by switching to a sequence in which a plurality of motors are sequentially driven.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part showing the mechanism of a motor-driven camera to which the present invention is applied, and FIG.
3) is an enlarged plan view showing the operation mode of the movable reflection mirror driving cam and the shutter charging cam in FIG. 1 above, and FIGS. 4 is an enlarged plan view showing the operation mode of the charge completion switch, FIG. 4 is an enlarged plan view of the film feeding state detection switch shown in FIG. 1, and FIG. 5 is an enlarged plan view of the motor-driven camera shown in FIG. Diagrams showing the configuration of the electric circuit, and FIGS. 6 to 9 are flowcharts showing the operation of one embodiment of the motor-driven camera. 1.20.50... Motor 70... Control circuit 76...・・・・・・・・・
Motor drive circuit 77・・・・・・・・・・・・・・・
...Power supply bulk diagram 2 (A) (B)

Claims (1)

[Claims] (1) A plurality of motors that respectively drive each operating means of the camera, a power source battery, a drive circuit that supplies electric power from the battery to the plurality of motors, and a control signal outputted to the drive circuit. and a control means for controlling the drive sequence of the plurality of motors, wherein at least one of the actuation means has a detection means for detecting the end of the operation, and the control means controls the motor driving the actuation means. If the operating time until the end signal is input is shorter than a predetermined value, the plurality of motors are simultaneously driven in a specific combination. and if the operating time is longer than a predetermined value, a sequence of sequentially driving at least one combination of motors among the specific combinations is performed. camera.