JPS6289937A - camera - Google Patents

Abstract

PURPOSE:To change the speed of all transmission systems automatically without extending the space, raising the cost, neither increasing the circuit load of an electric system by interlocking automatic speed changes of a change transmission system with that of a winding transmission system. CONSTITUTION:While a winding motor M2 is driven, the abnormal low speed detecting process is performed by the time interruption processing. A main routine is interrupted to perform the time interruption processing repeatedly at intervals of a certain time set by an interruption timer, and an abnormal low speed is detected by the abnormal low-speed detecting process having a relatively large number of steps during the motor driving period before detection of winding completion. This abnormal low-speed detecting process monitors whether a pulse period t1 of a winding signal consisting of a pulse generated at every certain rotation angle of a sprocket exceeds a detection reference time or not, and the abnormal low speed is detected if it exceeds the reference time. If a low-speed reduction rate is so set that torque is sufficiently large, a high-speed reduction rate is set to the optimum value for good winding load 9 and supply voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention is characterized in that film winding and charging of various parts of the camera are driven by at least two motors, and that a transmission system connected between each motor and its load is driven by at least two motors. This invention relates to an improvement in an electric drive device for a camera that has two transmission ratios and is capable of switching between these transmission ratios.

(Background of the invention) In recent years, motor-driven I# devices have been widely adopted, and shutter and lens charging, film winding, rewinding, etc., are driven by a single motor or multiple motors, making it extremely difficult to Operability has also improved. Under these circumstances, the hoisting transmission system has multiple reduction ratios, and the reduction ratio can be switched depending on the power supply status, load status, etc.
The present applicant has already filed an application for driving a motor in an optimal state. If such a device is equipped with multiple motors and transmission systems, and the reduction ratio of each transmission system is to be switched individually, abnormally low speeds of the film winding motor and charging motor are detected, and the transmission system If the reduction ratios are automatically switched (automatic shifting), automatic shifting of all the transmission systems will be possible, but there will be problems of the first order.

a. An independent sensor is required to detect the speed of each motor, which increases space and cost.

b. The circuit load of the electrical system increases, causing problems in cost and reliability. In particular, recently, microcomputers are often used to perform software processing, and since software processing is performed in chronological order, it is extremely difficult to perform multiple processes at the same time.

(Object of the Invention) An object of the present invention is to solve the above-mentioned problems and to realize an automatic speed change of the transmission system of a plurality of motors that drive film winding and charging of various parts of the camera, while saving space, cost, and electrical circuit load. It is an object of the present invention to provide an electric drive device for a camera that can perform one operation without increasing the number of units.

(Characteristics of the Invention) In order to achieve the above object, the present invention provides a method for film winding in a state where the speed ratio of the transmission system of at least two motors for driving film winding and charging of various parts of the camera is high. Control means is provided for switching the gear ratios of all of the transmission systems to low speed by detecting abnormally low speed, so that the automatic speed change of the charge transmission system is linked to the automatic speed change of the hoisting transmission system. It is characterized by

(Example of the invention) FIG. 1 shows the basic configuration of an embodiment of the present invention.

Setting means 1 is a single-frame shooting mode in which the speed reduction ratio of the winding transmission system and charge transmission system is usually high speed, and the speed is automatically switched from high speed to low speed as the film winding speed decreases. In continuous shooting mode, the reduction ratio of the winding transmission system and charge transmission system is usually high speed, and the continuous shooting high speed mode automatically switches from high speed to low speed as the film winding speed decreases. During shooting, the camera is set to one of the continuous shooting low-speed mode in which the reduction ratio of the winding transmission system and charge transmission system is fixed at low speed, and the control means 2 sets the camera to the set mode. Perform control accordingly.

? When the i-shot high-speed mode or the quick-shot high-speed mode is set, when shooting is completed, the control means 2, which is made up of, for example, a microcomputer, operates the drive circuit 3.4 to operate the winding motor M2 and charge motor M1 in one direction (for example, (forward direction). As a result, the switching means 5,
6 switches to high-speed transmission systems 7 and 8 each having a high-speed reduction ratio (low reduction ratio). As a result, the rotational force of the first winding motor M2 is transmitted to the winding load 9 (including the film 10) via the high-speed transmission system 7, and the film 10 is wound at a relatively high speed. At the same time, the rotational force of the charge motor M1 is transmitted to the charge load 11 via the high-speed transmission system 8, and the shutter mechanism, lens aperture adjustment mechanism, etc. are charged at a relatively high speed.

During the driving period of the hoisting motor M2, an abnormally low speed detection process (FIG. 2) is performed by time interwoven processing. Timer interwoven processing is performed by interrupting the main routine at fixed time intervals set by an interwoven timer (not shown). During the motor drive period before the completion of one winding is detected, Abnormally low speed is detected by an abnormally low speed detection process that has a relatively large number of steps. As shown in FIG. 3, the abnormally low speed detection process consists of a pulse period of 1.0 . The system monitors whether or not the time exceeds the detection reference time, and detects abnormally low speed when the time exceeds the detection reference time. Abnormally low speed detection at a high speed reduction ratio is performed in order to switch the reduction ratio to a low speed.

When the winding load 9 is heavy, or when the power supply voltage drops due to the elapse of battery usage time or a drop in ambient temperature, the torque may be low at a high speed reduction ratio and the film may not be able to be wound. In this case, by switching to a low speed reduction ratio and winding with a large torque, it is possible to determine whether the film cannot be wound at the end or because the winding load 9 is heavy or the like. Therefore, if the low-speed reduction ratio is set so that the torque is sufficiently large, the high-speed reduction ratio can be set to the optimum reduction ratio when the hoisting load 9 and the power supply voltage are favorable. When an abnormally low speed is detected in the abnormally low speed detection process, as shown in FIG. 2, the control means 2 determines whether the reduction ratio is high speed or low speed. In other words, the drive circuit 4 causes the charge motor M1 to rotate in the other direction (for example, in the reverse direction), thereby causing the switching means 6 to shift to a low speed with a low speed reduction ratio (large reduction ratio). Switch to transmission system 13.

Next, perform automatic gear shift 2 on the winding transmission system. That is, the drive circuit 3 causes the hoisting motor M2 to rotate in the other direction, thereby causing the switching means 5 to switch to the low-speed transmission system 12 having a low-speed reduction ratio. Therefore, the rotational force of the charge motor M1 is transmitted to the charge load 11 via the low-speed transmission system 13, and the shutter mechanism, lens aperture adjustment mechanism, etc. are charged at a relatively low speed, and at the same time, the winding motor M2
The rotational force is transmitted to the winding load 9 via the low-speed transmission system 12, and the film 10 is wound up at a relatively low speed.

After that, start the interactive timer and return to the main routine. If an abnormally low speed is detected at a low speed reduction ratio, it is determined that the film has ended, and since there is no need to perform timer interrelated processing thereafter, the process returns to the main routine without starting the interrelated timer.

When the winding completion signal is input from the film feed detection means 14, the control means 2 controls the winding motor M2 by changing the drive signal to the drive circuit 3 in a duty manner or reducing the level of the drive voltage. Starts deceleration control. An abnormally low speed detection process is also performed during this deceleration control period, but this is another abnormally low speed detection process with a relatively small number of steps. As shown in Fig. 3, this abnormally low speed detection process monitors whether the entire time t2 of the deceleration control period exceeds another detection reference time, and detects abnormally low speed when it exceeds another detection reference time. be. As a result, automatic speed change 1 is performed on the charge transmission system and automatic speed change 2 is performed on the hoisting transmission system, and the timing of the deceleration control period t2 is restarted from the beginning. When the deceleration control period t2 at the low speed reduction ratio exceeds the detection reference time again, it is determined that the film has ended.

When the charging detection means 15 detects the completion of charging, the control means 2 controls the charging motor M1 to stop.

When the film feeding detection means 14 detects the completion of winding, the winding motor M2 is controlled to stop.

Note that the switching means 5, the high-speed transmission system 7, and the low-speed transmission system 12 constitute 2 in the hoisting transmission system, and the switching means 6, the high-speed transmission system 8
The high speed transmission system 7.8 and the low speed transmission system 12.13 may share a part of the reduction gear train, in which case the switching means 5 .6 is inserted in the middle of the transmission system 7, 12 or 8, 13.

When the quick shooting low speed mode is set, when an abnormally low film winding speed is detected, it is always determined that the film has ended.

According to this embodiment, since abnormally low speed detection is not performed for the charge motor Ml, space and cost can be reduced accordingly, and the circuit load on the electrical system can be reduced. Moreover, software processing by a microcomputer can be simplified.

In this embodiment, switching of the reduction ratio of 2 for the hoisting transmission system and 1 for the charging transmission system is performed by switching the rotational direction of the hoisting motor M2 and the charging motor M1, but it may also be done by a magnet or the like. Further, although it is designed to be able to switch to one of two reduction ratios, it may also be possible to switch to three or more reduction ratios.

Although this embodiment uses one charge motor Ml, the present invention can also be applied to a structure in which charging of each part of the camera is shared among a plurality of charge motors.

Examples of an electric drive device for a camera embodying the embodiment shown in FIG. 1 are shown in FIGS. 4 to 11.

FIG. 4 is a diagram showing the arrangement of each motor when the camera is viewed from the front. Ml is a charge motor that controls the shutter charge, the aperture adjustment mechanism, the aperture drive mechanism, and the mirror lifting mechanism, and is arranged at the front left end of the camera 20. As for the charge motor Ml, load fluctuations due to environmental conditions are small, but since the absolute load is large, a relatively large motor is required, and is therefore housed in a grip 21 formed protruding from the front left end of the camera 20.

Kl is a charge transmission system for charge motor Ml.

The winding motor M2 has a spool configuration 2 for winding the film.
The rewind motor M3 is located in the front right side of the camera 20, that is, on the cartridge side, and the rewind motor M3 is located adjacent to the rewind transmission system. . 23 is the power battery, which consists of four AA batteries.

FIG. 5 is a diagram showing the arrangement of each motor when the camera 20 is viewed from above. 24 is a film cartridge, 25 is a blade type longitudinal reshutter, 26 is a mirror elevating mechanism, 27 is a lens aperture adjustment mechanism, 28 is a lens aperture drive mechanism, and 29 is a sprocket configuration for determining the feed value of the film 30.

FIG. 6 shows details of the charge motor Ml and the charge transmission system Kl.

Binion gear 101 is fixed to the output shaft of charge motor Ml and meshes with gear 102. Gears 102 and 103 constitute a two-stage gear, and are each rotatably supported by shafts 114 set on a base plate 117. The gears 102 and 103 each have protrusions LO2a that alternately protrude in the thrust direction.
, 103a are formed, and by fitting these protrusions 102a and 103a, the gears 102 and 103 mesh and interlock in the rotational direction, but can freely move relative to each other in the thrust direction. On the other hand, the gear 103 has a surface in contact with a planetary lever 106 that rotates about a shaft 114, and is brought into frictional contact with the planetary lever 106 by a compression spring 104 disposed between the gears 102 and 103. As a result, the planet /<-106 rotates following the rotational direction of the gear 103. The gear lO5 is a shaft 11 mounted on the planetary lever 106.
5, and is always engaged with gear 103. The gear 107 constitutes a two-stage gear in which a large gear 107a and a small gear (not shown) fixedly formed above the large gear 107a are rotatably supported on a shaft 111 set on a base plate 117. When the gear 105 rotates in the counterclockwise direction (in the direction of the arrow), the planetary lever 106 rotates clockwise and the large gear 107a meshes with the gear 105. The gear 108 is planted on the base plate 117. It is rotatably supported by a shaft 112 and consists of a large gear 108a and a small gear (not shown) fixedly formed above the large gear 108a. The large gear 108a is always meshed with the small gear of the gear 107. The gear 110 is rotatably supported by a shaft 116 mounted on the planetary lever 106, and constantly meshes with the gear 103. When the gear 103 rotates counterclockwise and the planetary lever 106 rotates counterclockwise, the gear 110 meshes with the large gear 108a, and the cam gear 109 is rotatably supported on a shaft 124 mounted on the base plate 117. , a gear 109a and a cam 113 are formed. The gear 109a is always engaged with the small gear of the gear 108, and the transmission system from the binion gear 101 to the cam gear 109 is switched depending on the rotational direction of the charge motor M1. That is, when the charge motor M1 rotates counterclockwise, each part rotates in the direction of the solid line arrow, and due to the clockwise rotation of the planetary lever 106, the pinion gear 101→
The gears are switched to a low-speed gear with a large reduction ratio, consisting of gears 102, 103 → gear 105 → gear 107 (large gear 107a, small gear) → gear 108 (large gear 108a, small Kia) → cam gear 109. On the other hand, when the charge motor Ml rotates clockwise, each part rotates in the direction of the dotted arrow, and due to the counterclockwise rotation of the planet 8-106, the pinion gear 101 → gear 102, 103 → gear 110 → gear 108 ( The transmission is switched to a high speed gear train with a small reduction ratio consisting of a large gear 108a and a small gear)→cam gear 109. The two gear trains are set so that the cam gear 109 always rotates clockwise no matter which direction the charge motor M1 rotates.

The first shutter charge lever 118 is rotatably supported on a shaft 125 mounted on the base plate 117.

A rotatable roller 119 is attached to a shaft 118a at one end of one lever.
One end of the other lever forms a cam 118b. The roller 119 slides on the cam surface on the outer periphery of the cam 113 of the cam gear lO9, and provides the first shutter charge lever 118 with a swing that follows the cam displacement of the cam surface.

This swing also causes the cam 118b to swing. The second shutter charge lever 120 is connected to the main plate 117
It is rotatably supported by a shaft 127 installed in the shaft 1.
It has rollers 121 whose rotation axis is 20a.

The roller 121 is engaged with the cam 118b, and the swinging of the first shutter charge lever 118 allows the second shutter charge lever 120 to swing. and,
The second shutter charge lever 120 charges a known shutter mechanism (not shown).

The small par 122 is a lever that charges a known aperture adjustment mechanism, mirror elevating mechanism, lens aperture drive mechanism, etc., and is rotatably supported on a shaft 126 set on the base plate 117, with one end of the lever The rotatable roller 123 is connected to the shaft 12
2a, and this roller 123 engages with the cam 118c of the first shutter charge lever 118. Therefore, the 1//<-122 moif shutter charge lever 118 swings and moves to charge the diaphragm adjustment mechanism, mirror lifting mechanism, and the like.

SO is a contact piece member that is fixedly attached to the cam gear 109, constitutes a switch with a pulse signal board (not shown) consisting of a comb-shaped conductive pattern, and detects a moment before the charging is completed by the charge motor Ml. .

Sl is also a similar contact member that constitutes a switch with the pulse signal board fixed to the cam gear 109, and is used to detect the completion of charging by the charging motor Ml.

FIG. 7 shows details of the hoisting motor M2 and the hoisting transmission system 2.

Pinion gear 201 is secured to the output shaft of hoist motor M2 located within spool arrangement 22. The gear 202 is a two-stage gear having a large gear 202a and a small gear 202b, and is supported so as to be able to rotate once.

The large gear 202a meshes with the pinion gear 201. The gear 203 has a large gear 203a and a small gear 203b.
The large gear 203a is rotatably supported by a stepped gear, and the large gear 203a meshes with the small gear 202b. The gear 204 is a two-stage gear having a large gear 204a and a small gear 204b, and is rotatably supported, and the large gear 204a meshes with the small gear 203b.
There is also a planetary lever 219 on the central axis of the stage gear 204.
a is rotatably supported by a bearing 219b, and a compression spring 220 is disposed between the small gear 204b and the bearing 219b to bring the bearing 219b and the large gear 204a into frictional contact. This frictional contact causes the planetary lever 219a to rotate in accordance with the direction of rotation of the gear 204. A large gear 205a and a small gear 20 are mounted on the planetary lever 219a.
5b, a large gear 208a and a small gear (not shown) fixedly formed below the large gear 208a.
A stage gear 208 is rotatably mounted. A two-stage gear 206 is arranged near the gear 205, and a large gear 206a and a small gear 206b are independently rotatably supported. However, large gear 206a and small gear 2
A coil spring 215 is arranged between the large gear 206a and the large gear 206b, and one end of the coil spring 215 is fixed to the post 206c of the large gear 206a.
As the small gear 206b rotates in the clockwise direction, the coil spring 215 tightens the shaft portion of the small gear 206b, causing the small gear 206b to rotate together. Gear 207 is in constant mesh with small gear 206b and rotates sprocket arrangement 29 by shaft 216. Sprocket configuration 29 is a sprocket.

It consists of shafts 29a, 29b and a shaft 29c. A pulse signal board P2 whose circumference is divided into 12 equal parts is fixed to the gear 207, and when the sprockets 29a and 29b rotate once,
Two pulses are obtained via the contact piece S2. Therefore, the sprockets 29a and 29b have 6 teeth, and 3
In a 5 mm full-size camera, one frame of film is fed in 4/3 of the rotation, so the number of pulses obtained via the contact piece S2 is 16. Needless to say, it is possible to arbitrarily select an equal number of pulse signal substrates P2.

A two-stage gear 209 is arranged near the gear 208, has a large gear 209a and a small gear 209b, and is rotatably supported. The spool gear 210 is fixed to the spool 211 of the spool configuration 22 and rotatably supported, and is always engaged with the small gear 209b.The spool 211 has a rubber member 211a around its surface that promotes automatic winding of the film. It is pasted. Further, a cover 212 is disposed near the outside of the spool 211 and is rotatable by a shaft 213 provided on the fixed part of the camera.
The cover 212, the shaft 213, and the spring 214 are pressed toward the spool 211 side by the spool 211 by the spool 211. Another set will be placed.

The rotation of the sprocket 29b is transmitted to the gear 217 by the coupled sleeve, and further transmitted to the detection gear 218 that meshes with the gear 217. The ratio of the number of teeth between gear 217 and detection gear 218 is 3:4. A pulse signal board P3 that generates one pulse per rotation is fixed to the gear 218, and the pulse is obtained via the contact members S3 and S4. The armature member S3 is provided a predetermined phase ahead of the armature arm S4, and the drive of the hoisting motor M2 is switched to duty drive by the pulse output from the armature member S3 to lower the rotation speed. When the winding motor M2 is braked by the pulse from the contact member S4, it is made to stop quickly.

When the winding motor M2 is controlled by a pulse generated during one rotation of the detection gear 218, one frame of film is fed in a 35 mm full-size camera. Naturally, the ratio of the number of teeth between the gear 217 and the detection gear 218 should be set to 3:2, or the ratio of the number of teeth may remain 3:4.
If the pulse signal board P3 is divided into two equal parts and one pulse is generated every 180 degree rotation, the amount of film feed per time can be reduced to half size. Further, in this case, if the winding motor M2 is stopped when two pulses are counted, it is possible to make the film feed amount the full size. Furthermore, by making it possible to switch the number of pulses counted between 1 and 2, full size and half size can be easily accommodated.

Describing the transmission of rotational force of the hoisting motor M2 0 When the hoisting motor M2 rotates counterclockwise, each part rotates in the direction of the solid line arrow, the gear 204 rotates clockwise, and the planetary lever 219a rotates clockwise. Let small gear 205
b is engaged with the large gear 206a, and the gear 208
The small gear meshes with the large gear 209a. Therefore, the rotation of the hoisting motor M2 is from the pinion gear 201 to the gear 202 (large gear 202a, small gear 202b).

Gear 203 (large gear 203a, small gear 203b) - Gear 204 (large gear 204a, small gear 204b) → Gear 20
5 (large gear 205a, small gear 205b) →Gear 20
6 (large gear 206a, small gear 206b) → gear 207
→It is transmitted to the sprockets 29a and 29b at a low speed reduction ratio, and the gears 204 (large gear 204a, small gear 2
04b) → Gear 208 (large gear 208a, small gear) →
The signal is transmitted from the gear 209 (large gear 209a, small gear 209b) to the spool gear 210 to the spool structure 22 at a low speed reduction ratio.

On the other hand, when the winding motor M2 is rotated clockwise, each part rotates in the direction of the dotted arrow, the gear 204 rotates counterclockwise, rotates the planetary lever 219a counterclockwise, and rotates the large gear 205a. It meshes directly with the spool gear 210. Therefore, pinion gear 201 → gear 2
02 (large gear 202a, small gear 202b) →Gear 20
3 (large gear 203a, small gear 203b) → gear 204 (
Large gear 204a, small gear 204b) → Large gear 205a
→The transmission system is switched to a high-speed transmission system with a small reduction ratio consisting of the spool gear 210. In addition, Subrokerato 29a, 29
The transmission system to b is cut off, and the sprockets 29a and 29b become free to rotate.

As described above, the transmission system of the spool configuration 22 directions of the hoisting motor M2 can obtain two types of reduction ratios depending on the rotational direction of the hoisting motor M2. Specifically, a low speed reduction ratio is obtained when rotating counterclockwise, and a low speed reduction ratio when the hoisting motor M2 rotates counterclockwise. A clockwise rotation results in a high speed reduction ratio. However, in either direction of rotation, the spool arrangement 22 always rotates counterclockwise.

Note that during automatic film loading, the winding motor M2 is rotated counterclockwise, the reduction ratio of 2 in the winding transmission system is switched to the low speed side, and the sprocket structure 29 and the spool structure 22 are rotationally driven at low speed. When advancing frames after each subsequent shot, if the single-shot high-speed mode or quick-shot high-speed mode is set, and under normal conditions, the winding motor M2 is rotated clockwise and connected to the first winding transmission system. 2 is switched to the high speed side, and only the spool structure 22 is driven to rotate at high speed.

During frame feeding, when the reduction ratio is automatically switched from high speed to low speed according to the power supply state or load state, the first winding motor M2 is rotated counterclockwise.

Both the sprocket configuration 29 and the spool configuration 22 are rotationally driven, but since the reduction ratio of the transmission system is set so that the circumferential speed of the spool configuration 22 is greater than the circumferential speed of the sprocket configuration 29, the sprocket configuration 29 is driven by the film being wound onto the spool arrangement 22, so there is no problem, so the sprocket arrangement 29 only drives the film when the film is not being wound by the spool arrangement 22, but otherwise.
It follows the film regardless of the rotational direction of the winding motor M2.

FIG. 8 shows details of the rewind motor M3 and the rewind transmission system 3.

The pico-on gear 301 is fixed to the output shaft of the rewind motor M3. The gear 302 includes a large gear 302a and a small gear 302.
A two-stage gear with b, rotatably supported, and large gear 3
Gear 303 is a two-stage gear having a large gear 303a and a small gear 303b, and is rotatably supported, and the large gear 303a meshes with the small gear 301.
It meshes with 2b. The planetary lever 306 is rotatably supported on the same axis as the gear 303, and the compression spring 305 is connected to the small gear 3.
03b and the planet 8-306, and brings the planetary lever 306 and the large gear 303a into frictional contact. Due to this frictional contact, the planetary lever 306 rotates in accordance with the direction of rotation of the gear 303. Planetary lever 30B
A two-stage gear 304 having a large gear 304a and a small gear 304b is rotatably attached to the tip. The gear 307 is attached to one end of the shaft 307b with a screw 307a, and the fork 308 is attached to the other end of the shaft 307b. Fork 308 is cartridge storage chamber 310
It is arranged to protrude inside and is configured to mesh with a winding shaft of a film cartridge (not shown). A coil spring 309 is arranged between the receiving washer 3070 on the shaft 307b and the fork 308, and a coil spring 309 is arranged between the receiving washer 3070 on the shaft 307b and the fork 308. It is now possible for staff members to temporarily evacuate.

When the rewind motor M3 rotates clockwise, the gear 303
rotates clockwise to rotate the planetary lever 30B clockwise to engage the small gear 304b with the gear 307,
Therefore, the pinion gear 301-+gear 302 (large gear 3
02a, small gear 302b) - gear 3O-3 (large gear 30
3a, small gear 303b) →Gear 304 (large gear 304
a, small gear 304b) → gear 307 → fork 308
and rotational force is transmitted. On the other hand, the rewind motor M3
When rotates counterclockwise, the planetary lever 306 rotates counterclockwise, and the engagement between the small gear 304b and the gear 307 is cut off, and the rotational force is not transmitted to the fork 308. By rotating the rewind motor M3 slightly counterclockwise, it is possible to prevent the winding load from being applied to the rewind transmission system 3 and the rewind motor M3 when winding the film by the winding motor M2, thereby reducing the load. It is now possible to wind the film.

FIG. 9 shows a microcomputer COM as control means 2.
A specific example of an electric circuit in which this is used is shown below.

The light receiving element SPC receives reflected light from the subject and inputs the received light signal to a high input impedance operational amplifier OPi whose feedback circuit is connected to a compression diode DI. The operational amplifier OPI outputs logarithmically compressed object brightness information By via a resistor R1. Variable resistors VR1 and VH2 connected to the constant voltage source Gl output film sensitivity information Sv and aperture value information Av. The operational amplifier OP2 with the resistor R2 connected to the feedback circuit has the shutter time information Tv=(
By+5v-Ay) is calculated and output. The shutter speed information Tv is converted into a 4-bit digital value by an A/D converter ADC.

Viewfinder display device D via decoder driver DCD
In addition to being displayed on the SP, the microcomputer COM
input ports PGO to PG3. In addition, the 4-bit code 0001 to 1000 is 1/1000 second to l.
/8 seconds, and codes oooo and 1001 or more correspond to warning display elements.

(by the first stroke of the release button)
When the first stroke switch swl connected to PF7 is turned on, the potential of the output port PE3 becomes high level, so the transistor TRI is turned on by the inverter If and the resistor R3, and the voltage from the battery vbt is converted to the power supply voltage Vcc. The arrow ↑ in the 0 figure supplied to the circuit is V
cc, and the power supply voltage Vcc is naturally supplied to circuit blocks not marked with an arrow ↑, such as operational amplifiers and A/D converters. Note that another power supply voltage VDD is supplied to the microcomputer COM, decoder LDEC, and display LCD.

A capacitor Cr is connected to the terminal RST of the microcomputer COM, and a crystal oscillator QZ is connected to the terminals XO and Xl.
is connected, power supply voltage vDD is applied to terminal vDD,
Terminal GND is grounded.

The PAO-PA3 has a second stroke switch sw2 that is turned on by the second stroke of the release button, a mirror up switch SwMRUP that is turned off when the mirror is up and turned on when the mirror is down, and a switch that turns off and charges when the front curtain is completed. Front curtain switch swcN turns on when completed
1. A trailing curtain switch s w CN 2 is connected, which is turned off when the trailing curtain travel is completed and turned on when charging is completed.

The input port PFO-PF4 is connected to a first film switch swFLMl consisting of a pulse signal board P2 and a contact member 32 (FIG. 7), a pulse signal board P3 and a contact member S3.
(Fig. 7) A second film switch swFLM2 consisting of
, a third film switch swFLM3 consisting of a pulse signal board P3 and a contact member S4, a pulse signal board and a contact member SO fixed to the cam gear 109 (Fig. 6), and is turned on just before charging is completed. A first charge switch swcGEl and a second charge switch swCGE2, which is composed of the same pulse signal board and contact piece Sl and is turned on when charging is completed, are connected to each other. Further, a self-drive changeover switch 5wM0DE is connected to the input capacitor PF5, which is turned off when the self-timer mode S is set and turned on when the drive mode D is set. Input port PF6 has self-second time (2 seconds, 10 seconds) in self-timer mode S.
seconds) or within drive mode D (single shot high speed,
A push-button selection switch s wS TE P that is pressed when selecting high speed continuous shooting or low speed continuous shooting is connected.

The self-drive changeover switch 5wM0DE and the selection switch 5w5TEP correspond to the setting means 1 in FIG. 1, and are provided at a position on the camera body that is easy to operate, for example, on the front right side of the lens.

Output boats PE0-PE2 include transistors TR2-T.
The base of R4 is connected, and the transistors TR2 to TR4
(1) A first clamping magnet made of a permanent magnetic material that starts the mechanical release operation) A leading curtain magnet that drives the MGO1 leading curtain)
The MCI controls the energization of the rear curtain magnet (MG2) that drives the rear curtain.

A drive circuit DR2 that drives the hoisting motor M2 is connected to the output ports PBO and FBI, and the output ports pco and p
A drive circuit DR3 for driving a rewind motor M3 is connected to ci, and a drive circuit DRI for driving a charge motor M1 is connected to output ports PDO and PDI.

The drive circuits DRI-DR3 have the same circuit configuration, and the circuit configuration is shown in FIG. 1O. A 2-bit signal is input to input terminals A and B. First, A=1. If B=0, the signal at the input terminal B is inverted by the inverter IIO, so the output of the AND gate A12 becomes 1, the output of the OR gate 0RIO also becomes 1, and the transistor TR32 is turned on. Further, since the output of the input terminal 113 becomes O, the transistor TR31 is also turned on. Therefore, the power supply voltage Vcc is applied to the motor M, a current flows, and the motor M rotates in a predetermined direction.

When A=O, B=1, the signal at input terminal A is inverted by inverter Ill, so the output of AND gate A10 is 1, and the output of OR gate 0RII is also 1. Inverter 1
12 becomes O, the transistor TR3
0, TR33 is turned on, current flows in the opposite direction to the motor M, and the motor M rotates in the reverse direction.

A=1. When B=1, the output of AND gate All is 1
, the outputs of the OR gates 0RIO and 0RII also become 1, so that the transistors TR32 and TR33 are turned on.

Therefore, if this mode is set while the motor M is rotating, the diodes DIO, Dll and the transistors TR32, TR33 will cut off the current flow, and the current will be cut off regardless of which direction the motor M is rotating. is short-circuited, and a brake is applied to the inertial rotation of motor M.

When A=0 and B=0, AND gate AIO~A1
All outputs of 2 become O, and transistor TR3O-T
All R33 are turned off, and the motor M is in an open state.

Returning to the explanation of FIG. 9. The output port PLO-PL3 outputs a binary 4-bit signal from the register RL in the microcomputer 700M, and the output port (CLKOUT) outputs a low frequency signal of about 2 Hz, which is obtained by dividing the fundamental frequency of the crystal oscillator QZ. Outputs a frequency pulse. Decoder LDEC is connected to these output ports, and decoder L
The DEC is connected to a display device LCD composed of liquid crystal or the like. The display device LCD is provided on the top surface of the camera body or inside the viewfinder.

FIG. 11 shows details of the decoder LDEC and the display LCD. Decoder LDEC is binary-hexadecimal decoder DEC
, ANDGATE A21. A22 and or game) 21,0
Consists of R22. The binary-hexadecimal decoder DEC has the first
As shown in FIG. 2, a 4-bit binary signal is converted into a hexadecimal signal, and the display device LCD lights or blinks the display elements L1 to L5 in response to the hexadecimal signal input. Blinking of the display element L1 indicates a single-shot automatic shift, and blinking of the display element L2 indicates a quick-shot automatic shift. The OR gate 0R22 may be connected as shown by the dotted line in FIG. 11, and the automatic speed change may be displayed by blinking the display element L3.

The operation of the microcomputer COM will be explained with reference to flowcharts shown in FIGS. 13-15.

The microcomputer COM operates by being supplied with the power supply voltage VDD. A basic clock is supplied from the crystal oscillator QZ, and at the same time a power-on reset is applied by the capacitor Cr.

Is the built-in program counter Off? The program will start from the start. Further, it is assumed that the O1 output port of each flag is also set to O.

[Step 1] Input from input boat PF7 (hereinafter P
The same applies to the other boat (F7 human-powered boat)), and when the first stroke switch SW1 is on, the process proceeds to step 2, and when it is off, the process proceeds to the mode processing shown in FIG. 15.

[Step 2] A high level signal is output from the output port PE3, turning on the transistor TRI (FIG. 9), and supplying the 711' source voltage Vcc to each part.

[Step 3] PA large input is input. If each part is fully charged and the photographer presses the second stroke of the release button, PAO=PA1=PA2=FA
Since 3=O, the PA large input hexadecimal value becomes OOH. If it is FA large input OOH, enter the release sequence and proceed to step 4; otherwise, return to step 1.

That is, when only the first stroke switch swl is on, steps 1 to 3 are repeated to perform photometry and display.

[Step 4] The apex value Tv (PG large input) converted into a 4-bit digital value by the A/D converter ADC is sent to the microcomputer COM.
is stored in the internal register RG.

[Step 5] If the branch command is based on the 4th bit data (see Figure 12) of the internal register RL of the microcomputer COM, and the 4th bit data is 1,
Since it is in self-timer mode, proceed to step 6 and set 0.
If so, proceed to step 9.

[Step 6] Branch instruction using the first hit data of register RL. If the data of the first bit is O, the self-timer seconds are 10 seconds, so the process goes to step 7; if it is ■, the self-timer seconds are 2 seconds, so the process goes to step 8.

[Step 7] The timer measures 10 seconds.

[Step 8] The timer measures 2 seconds.

[Step 9] The PEO output is set to 1, the transistor TR2 (FIG. 9) is turned on, and the first clamping magnet MGO is energized from the capacitor CO charged to approximately the same voltage as the power supply voltage Vcc. This activates the mechanical release operation. Thereafter, a waiting time TIMEI is created using a fixed time timer. Due to time-up, P
Set the EO output to O and de-energize the first clamping magnet (MGO). This waiting time TIMEI may be set to be slightly longer than the minimum time during which the first tensioning magnet (MGO) is energized.At this point, a known mechanical sequence of narrowing down and mirror up is started.

[Step 10 This is a wait routine until the mirror is uploaded. When the mirror is raised, the routine advances to step 11. This routine is provided to operate the shutter after confirming that the mirror is raised.

[Step 11] Determine flag FO. FO:1 represents the end of film.

[Step 12] Determine flag Fl. F1=O represents recognition of film stop at the completion of winding.

[Step 13] The contents of the register RG, which stored the shutter time in Step 4, are converted into data in a multiple series value. Since the value stored in register RG has been logarithmically compressed, this is a routine for expanding the data to match the actual control value.

[Step 14] Set the PEI output to 1 and energize the front curtain magnet (MCI). At this stage, the leading curtain starts running.

[Step 15] A real time count is performed using the data expanded in Step 13, and the calculated shirt time is measured.

[Step 16] Set the PE2 output to 1, energize the trailing curtain magnet MG2, and run the trailing curtain. with this,
Focal plane shutter control ends. The time T required for the trailing curtain to complete its run using a fixed timer
Create IME2, then set PE1=PE2=0,
The leading curtain magnet MCI and the trailing curtain magnet MG2 are de-energized.

[Step 17] This is a routine that waits for the trailing curtain switch swcN2 to be turned off, that is, for the trailing curtain to complete running.
Proceed to step 18.

[Step 18] Determine whether the contents of register RL are smaller than 2 or greater than or equal to 2. As shown in FIG. 12, if it is smaller than 2, the mode is either single-shot high-speed mode or continuous-shot high-speed mode, so the reduction ratio is high in either case, and the process advances to step 19. If it is 2 or more, it means that the speed reduction ratio is low, so the process advances to step 22.

[Step 19] PDO=0. By setting PDl=1, the drive circuit DRI is operated and the charge motor M1 is rotated in a direction in which the reduction ratio of the charge transmission system Kl (FIG. 6) becomes high speed.

This allows the shutter, mirror, automatic aperture, etc. to be charged at high speed.

[Step 20] PBO=0. By setting PB1=1, the drive circuit DR2 is operated, and the hoisting motor M2 is rotated in the direction in which the reduction ratio of 2 (see Figure 7) in the hoisting transmission system becomes high speed. This allows the film to be wound at high speed.

[Step 21] A constant P1 for a high-speed reduction ratio is stored in a register RP related to duty control immediately before the completion of hoisting, and a constant Ml for a high-speed reduction ratio is stored in a register RM related to detection of a decrease in hoisting speed.

[Step 22] PDO=1. By setting PD1=O, the charge motor M1 is rotated in a direction in which a reduction ratio of 1 in the charge transmission system becomes a low speed.

[Step 23] PBO=1. By setting PBl=O, the hoisting motor M2 is rotated in the direction in which the reduction ratio of the 2nd hoisting transmission system becomes a low speed.

[Step 24] Store constant P2 for low speed reduction ratio in register RP, and store constant M for low speed reduction ratio in register RM.
Memorize 2.

[Step 25] Set a constant RI to the register RD related to the detection of winding speed decrease during the duty control period, set the constant S to the register RS related to the certified time of film stop, set the contents of the register RM to the register RMM, and set the register RFP
The contents of the register RP are set to 1.For example, the contents of the register RMM are a constant M1 in the case of a high speed reduction ratio, and a constant M2 in the case of a low speed reduction ratio.

Set flags FO=F2=O and Fl=1.

Setting F1=1 means that the winding operation will start now. Flag F2 is the first film switch swF
It represents the on/off state of LM1.

[Step 26 Go Timer TM for timer interconnected]
Set constant K to R. The value of K is a constant determined by the film winding speed, the equal division number of the first film switch swFLM1 (7), the pulse signal board P2 (FIG. 7), and the instruction cycle time of the microcomputer COM.

Start timer TMR for timer interconnected. It also allows timers to be interacted with. (EN
T) Since the timer TMR has started, from now on, the timer TMR repeats decrementing independently from the main program routine, and is interlaced at fixed intervals (depending on the constant K), and the dedicated timer interwoven address is read from the running program. Jump to. Here, timer interrelated processing will be explained with reference to FIG. 14.

``Tie-fin interrupt processing j [Step 101] Stop the decrement operation of timer TMR and prohibit inter-interruption.

[Step 102] Winding of one frame of film is completed.
Input the PF2 manual power from 3. Here, step 2
At 0 or 23, the winding motor M2 is already activated, and at the first timer interlock, the third film switch FLM is activated.
3 is off, the process advances to step 103.

[Step 103] A branch is performed by the PFI input from the second film switch SWFLM2, which is turned on before the winding of one frame of film is completed. The second film switch swFLM2 is provided to decelerate the winding motor M2 immediately before winding is completed and improve the accuracy of stop control. It is also possible to perform deceleration. If it is assumed that the winding is not just before completion, the process advances to step 104.

[Step 104] Branching is performed by the PFO input from the first film switch swFLM1, which is repeatedly turned on and off during film winding. Now, PFO=O
Assuming that, the process proceeds to step 105.

``Seiko, Pu10 et al.'' Flag F2 is set to !IJ5111 - Since F2=O is set in step 25, the process proceeds to step 106.

[Step 106] The contents of register RMM are subtracted by 1, and the contents are stored in register RMM again.

[Step 107] Determine RMM=O. In the program up to now, RMM=M1 (M2)-1, so if the constant M1 (M2) is a relatively large value, it will not become O, so the process proceeds to step 108.

[Step 108] Reset the constant K in the timer register, start timer TMR, and enable timer-interrupted processing.

[Step 109] Return to the original program being executed. The timer-interrupted process is performed by setting the three film switches SwFLMl, s at regular intervals from the running program.
The purpose is to determine the status of wFLM2 and swFLM3. Since each instruction of the program itself is executed at a very high speed, it is assumed that there is virtually no problem by inputting the film winding information at regular intervals.

Now, suppose that the first film switch swFLM1 is turned off in a certain timer-interrupted process, step 104
The process then proceeds to step 110.

[Step 110] Determine whether flag F2=1. Since F2=0 was set in step 25, the process advances to step 111.

[Step 111] Set flag F2 to 1. This means that the first film switch s w F L M l has been turned off, that is, PFO=1.

[Step 112] If F2:1 is determined in step 105, the contents of flag F2 are changed to the first film switch 5.
In order to match the on of WFLM1, set flag F2 here.
Set to O.

[Step 113] Register RMM again
Set the contents of M. Thereafter, proceed to step 108,
Execute the routine described above. Assume that the winding has been carried out for a while, and now it is just before the l-body winding. At this time, the second film switch Sw F L M 2 is turned on, PF1=0, and the process proceeds from step 103 to step 114.

[Step 114] Determine whether the contents of register RFP are smaller than a constant P or greater than P. Register RFP is used to adjust the duty ratio of duty control. As explained in steps 21, 24.25, initially, the contents of register RFP are constant PL (for high speed reduction ratio).
or F2 (for low-speed reduction ratio), and these values are set larger than the constant P, so step 11 is first performed.
Proceed to step 5.

[Step 115] PBO=1. Set PB1=1. As a result, the energization of the hoisting motor M2 is cut off and the brake is applied.

[Step 116] Subtract 1 from the contents of register RFP and store the value in register RFP again.

[Step 117] Subtract 1 from the contents of register RD and store the value in register RD again. Register RD is used to detect the end of the film during the duty control period, and is set to a constant value in step 25.

The constant value is set to a somewhat large value.

[Step 118] Determine whether the contents of register RD are O. Since it is not O at first, the process advances to step 108 and the above-mentioned routine is executed.

After performing several timer-interrupted processes, if the contents of register RFP become smaller than the constant P, step 11
4, the program branches to step 119.

[Step 119] Determine whether the contents of register RL are smaller than 2 or greater than or equal to 2. Referring to Figure 12, 2
If it is smaller than 2, it is a high speed reduction ratio, so go to step 120; if it is 2 or more, it is a low speed reduction ratio.
Proceed to step 121, respectively.

[Step 120] By setting PBO=O and PBl=1, the hoisting motor M2 is connected to the hoisting transmission system.
The gear is rotated in the direction where the reduction ratio (Fig. 7) becomes high speed to perform high-speed winding.

[Step 121 PBO=1. By setting PB1=O, the hoisting motor M2 is connected to the hoisting transmission system.
The gear is rotated in the direction where the reduction ratio becomes lower, and low-speed winding is performed.

[Step 122] Determine whether the contents of register RFP are O. If not, proceed to step 116 and execute the routine described above. When it becomes O, the process proceeds to step 123.

[Step 123] Register RP to register RFP
(constant P1 or P2) is stored again.

In this way, the duty control is performed by putting the value in the register RFP and setting it once every timer interrupt (every fixed period of time).
When the contents of the register RFP are constant 2 or more, the power to the hoisting motor M2 is cut off and the brake is applied. When it is smaller than the constant P, current is applied to the hoisting motor M2, and when it becomes O, the register is The method is to enter the original value into the RFP and repeat it. Therefore, the duty ratio is
It is determined by the constant of the timer TMH and the constant P1 or P2 set in the register RFP, and does not depend on the on/off state of the first film switch swFLM1.

In addition, at high speed reduction ratio and low speed reduction ratio, step 21
．． Since the contents of the register RP are changed in step 24, the duty ratio can be selected independently. Furthermore, if the constant P2 is set to a value 1, for example 0, which is smaller than the constant aP, the process will always proceed from step 114 to step 119, so duty control can be avoided at low speed reduction ratios.

Now, the deceleration rotation of the hoisting motor M2 continues to be performed, and 1
When the frame winding is complete, the third film switch s w
FLM3 is turned on. At this time, the timer-interrupted process branches from step 102 to step 124.

[Step 124] Set PBO=l and PBl=1. As a result, the energization of the hoisting motor M2 is cut off and the brake is applied.

[Step 125] Similar to step 119, it is determined whether the contents of the register RL are less than 2 or greater than or equal to 2.

When the reduction ratio is high, the process proceeds to step 126, and when the reduction ratio is low, the process proceeds to step 127.

[Step 126] The constant 51 for the high-speed reduction ratio is subtracted from the contents of the register R3 that were first set to the constant S in step 25, and the result is stored in the register R3 again. The register R5 is used to set the certified time T and T2 from the stop signal of the 1-winding motor M2 to the time when the film is recognized as stopped at a high speed reduction ratio and a low speed reduction ratio.

[Step 127] Same as step 126.

A constant 52 for low speed reduction ratio is subtracted from the contents of register R3, and the result is stored in register R3 again.

[Step 128] Determine whether the contents of register R3 are less than 1 or greater than or equal to 1. If it is 1 or more, it means that the certified time T or T2 has not yet passed.
Proceed to step 108 and execute the routine described above. ■
If it is smaller, it means that the certified time TI or T2 has elapsed, and the process advances to step 129.

[Step 129] It is determined that the film has completely stopped, and the flag F1 is set to O.

Regarding steps 124 to 129, since the inertia of the hoisting transmission system is different between high speed reduction ratio and low speed reduction ratio,
Although the stabilization time from when the stop signal of the winding motor M2 (step 124) is issued until the film completely stops varies, the recognized time from the stop signal of the winding motor M2 until the film is recognized as stopped is correspondingly different. T.I., T.
2 (from step 124 to step 129) are made different by separately determining the constants St and S2. Therefore, at a high speed reduction ratio with low inertia, it is possible to recognize that the film has stopped in a shorter time than at a low speed reduction ratio with high inertia, and it is possible to proceed to the next operation.

After step 129, the process returns to step 109 to return to the program being executed. Here, since step 108 is not passed, no timer interrupt occurs thereafter.

Next, let us consider a situation where the power supply voltage decreases while the winding motor M2 is being driven, or the film winding speed decreases due to a temperature change even though a high speed reduction ratio is set.

As the film winding speed decreases, the time interval at which the first film switch FLMI is turned on and off becomes longer. However, since the timer interrupt takes a certain period of time, step 105 or step 11
The number of routines that proceed from 0 to step 106 increases, and finally the contents of register RMM become 0. In this way, an abnormally slow film winding speed is detected. At this time, the process advances from step 107 to step 130. In addition,
The value of the register RM that initializes the register RMM needs to be determined independently for the high speed reduction ratio and the low speed reduction ratio because the film winding speed is different, so a different constant Ml is set in step 21.24. , M2.

The timeout routine for detecting abnormally low film winding speed, which consists of steps 104 to 107 and 110 to 113, is not used during the duty control period. The reason is that the last step 116 of the duty control routine
, 123, if this timeout routine is continued, the number of program steps for timer-interrupted processing will increase, and the time required to return to the main routine will become longer.For example, the timing of applying the brake of charge motor M1 will be delayed. This is because problems may occur in the program being executed. Therefore, during the duty control period, when the entire duty control period becomes longer than the time depending on the initial setting constant of the register RD, film winding is performed by steps 117 and 118, which constitute the abnormally low speed detection process of the duty control period. If an abnormally low speed is detected, the process branches to step 130.

[Step 130] It is determined whether the contents of the register RL are smaller than 2 or greater than 2, that is, whether the reduction ratio is high or low. When the reduction ratio is high, the process proceeds to step 131, and when the reduction ratio is low, the process proceeds to step 132. At high speed reduction ratio,
When the film winding speed decreases, film winding becomes possible by switching the reduction ratio from high speed to low speed. If the film winding speed decreases at a low speed reduction ratio, as long as the power supply voltage that allows exposure control of the camera is maintained, assuming there is sufficient film winding ability at the low speed reduction ratio, only when the film ends becomes.

[Step 1311 Determine PF4 manual power indicating the state of the second charge switch CGE2. If charging has not been completed, the process advances to step 133; if charging has been completed, the process advances to step 134.

[Step 132] When you have proceeded to this step,
This is the case when the film winding speed is low at a low speed reduction ratio and the film has finished, as explained in step 130. Therefore, PBO=O,P
By setting Bl=0, both terminals of the hoisting motor M2 are opened. Also, a flag FO is set to 1 to indicate the end of the film. After this, the process proceeds to step 109, so no timer interaction is required from this point on.

[Step 133] Since charging is not completed, by setting PDO=l and PD1=O,
The charge motor Ml is rotated in a direction to switch the reduction ratio of the charge transmission system Kl (FIG. 6) to a low speed, and charging is performed at a low speed.

[Step 1343 By setting PBO-1, PBl = 0, the hoisting motor M2 is rotated in the direction of switching the reduction ratio of 2 (Fig. 7) to a low speed in the hoisting transmission system,
Wind up at low speed.

[Step 135] Since the reduction ratio has been automatically switched from high speed to low speed in steps 133 and 134, the 3-bin ratio of register RL (FIG. 12) is set to 1, and the mode is changed to automatic speed change mode. At the same time, the contents of register RL are outputted from output ports PLO to PL3 to decoder LDEC. As a result, the display element L1 or L2 (FIG. 11) of the display device LCD flashes to indicate that the automatic transmission mode has been switched.

Since the reduction ratio has been switched to low speed, set constant P2 for low speed reduction ratio in register RP, and set register RFP to constant a.
Initialize to P2. Similarly, set constant M2 for low speed reduction ratio in register RM, and set register RMM to constant M2.
Initialize to .

Also, register RD is initialized to a constant value. Next, the process advances to step 108 and the routine described above is executed. Steps 133-135 are the features of the present invention.

The above-described timer-interrupted processing is always executed from step 26 of the main routine to step 12 of the next photographing, and accurately executes film winding control.

Returning to the description of the main program routine.

[Step 27] First charge switch swCGEL
Determine the PF3 manual power connected to.

Just before charging is complete, press the first charge switch s.
Wait for wCGE l to turn on, then step.

Proceed to step 28.

[Step 28] It is determined whether the contents of the register RL are smaller than 2 or larger than 2, that is, whether the reduction ratio is high or low.

When the reduction ratio is high, the process proceeds to step 29, and when the reduction ratio is low, the process proceeds to step 30.

[Step 29] Since it is a high speed reduction ratio, the charge motor M1 is energized and then cut off, and the brake is applied. This is to prevent charge motor M1 from continuing to rotate due to inertia and charging over when charging is completed and the brake is applied to charge motor M1 when charging is completed. The brake is applied in front of the battery so that the charging system stops exactly when charging is complete.

[Step 30] Wait for the input of the O signal from the second charge switch swCGE2 indicating that charging of the shutter, mirror, automatic aperture, etc. is completed, and then proceed to Step 31. Of course, timer-interrupted processing is performed many times while waiting for charging to be completed.

[Step 31] Set PDO=PD1=1.

As a result, the power to the charge motor M1 is cut off and the brake is applied.

[Step 32] A flag FO indicating the end of the film is determined. Assuming that the film has not yet finished, the process proceeds to step 33.

[Step 33] It is determined whether the contents of the register RL are 1, that is, whether the high-speed snapshot mode is in effect. If the continuous shooting high speed mode is selected, jump to NEXT (step 3). From step 3, the shooting sequence proceeds as described above, but what should be noted here is that the film is stopped when the winding is completed (flag F1 = O).
without checking the first tension magnet) MGO in step 9.
The problem is that the power is turned on. In other words, the aperture down and mirror up operations, which are not directly related to actual photographing, are executed regardless of the film stopping at the end of winding, thereby speeding up the process. Thereafter, in step 10, mirror up is confirmed, and in step 12, confirmation of film stop at the completion of winding is confirmed. Up to this point, the timer interrupt has been repeated many times, and if the film has been recognized as stopped when winding is completed, the process proceeds to the next shutter opening control. If not, the loop of steps 11 and 12 is repeated and waits for film stop recognition in the timer inclination processing. The above is the routine for continuous shooting high speed mode.

[Step 34] In cases other than continuous shooting high-speed mode, the film is stopped until the film is recognized as being stopped at the completion of winding (flag F
) Wait until 1 becomes O.

[Step 35] It is determined whether the contents of the register RL are 5, that is, the automatic speed change mode is instant shooting. If it is in the automatic speed change mode, jump to NEXT (step 3). Otherwise, proceed to step 36.

[Step 36] It is determined whether the contents of the register RL are 2, that is, the low-speed snapshot mode. If it is in quick-shot low-speed mode, jump to NEXT. Otherwise,
Proceed to step 37.

[Step 37] Determine whether the 4th bit of register RL is 1, that is, self-timer mode. If in self-timer mode, jump to NEXT. Otherwise, the process proceeds to step 38, and the self-timer mode has the same routine as the continuous shooting low-speed mode.

[Step 38] Determine PF7 manual power indicating the state of the first stroke switch SW1, wait for the first stroke switch swl to turn off, and return to 5TART. This step comes in case of single shooting high speed mode or single shooting automatic transmission mode, so the first stroke switch s
Wait until wl is turned off, that is, the release button is released.

In this way, when shooting continuously and the reduction ratio is low, unlike when using a high reduction ratio, the camera can be Abnormal movements can be prohibited. In other words, when shooting with a low speed reduction ratio, it takes a relatively long time to confirm that the film has stopped, so if you start the release sequence without confirming that the film has stopped, there will be a delay from the time the mirror closes up until the shutter opens. This takes too much time and gives the photographer an unusual feeling, but this can be prevented by steps 34 to 36.

Next, let us consider a case where the film ends midway through winding.

In this case, the flag FO=1 in the time interwoven process, so the process branches from step 32 to step 39.

[Step 39] PCO=0. Make it PO2-4,
The rewind motor M3 is energized via the drive circuit DR3 to start rewinding.

[Step 40] Set constant M3 in register RM.

[Steps 41-48] Steps 104- in Fig. 14
The program is similar to the program for detecting film movement explained in 107, 110 to 113, and when rewinding is completed, the first film switch sw F L M 1
This is a program that detects when the on/off state is no longer reversed, and when rewinding is completed, the process advances to step 49.

[Step 49] Set PCO=1 and turn rewind motor M
Stop the rotation of step 3.

[Step 50] A flag FO indicating the end of the film is reset to O.

[Step 51] Set the third bit of register RL to 0. In other words, if automatic gear shifting has been performed, automatic gear shifting is canceled upon completion of rewinding.

This is because the photographer originally set the single-shot high-speed mode or quick-shot high-speed mode, and if the film is changed or the external conditions (especially the temperature) are different, the next shot will be set to the high-speed reduction ratio. This is because it is more effective to return to the initial setting mode since there is a possibility that winding can be performed. After this, return to 5TART.

Next, during continuous shooting at a high speed reduction ratio, charging of the shutter, mirror, and automatic diaphragm is completed early, winding is not yet completed, and after the first tension magnet MGO for the next shooting operation is energized in step 9, Consider what happens when the film ends.

In this case, the mechanical release operation is activated by the first tension magnet (MGO), so the aperture is narrowed down and the mirror is raised, but the film stops midway through winding and cannot be wound any further. , 3rd film switch SW
FLM3 remains off. Therefore, if the film is rewound in this state, the photographer may misunderstand that the shutter is open and may perform an incorrect operation. Furthermore, if strong light rays enter through the lens, there is a risk of fogging the film. Therefore, it is best to let the mirror go down once and then rewind the film.

After checking the mirror up in step 10, step 1
1. While waiting for the film stop certification at the completion of winding at 12,
When the end of the film is detected by time interwoven processing,
In order to set the flag FO=1 in step 132, the process branches to step 52 in step 11.

[Step 52] PDO=1. PD1=O, and the charge motor M1 is rotated in a direction in which the reduction ratio of the charge transmission system Kl becomes low. The direction of rotation of the charge motor Ml may be switched according to the set mode.Next, the program jumps to step 30, confirms the completion of charging, and proceeds to steps 31, 32, and 39.

Enter rewind control.

"Mode processing J In step 1 of Fig. 13, the first stroke switch swl
When it is determined that the switch is off, the mode processing shown in FIG. 15 is performed.

[Step 1501　Set output port PE3 to O.

This turns off the transistor TRI (FIG. 9) and turns off the power supply voltage Vcc. Metering is stopped and
It saves electricity. Note that the power supply voltage V[, D is alive.

[Step 151 Self-drive selector switch 5
Determine PF5 manpower from wM0DE. If the mode is the drive mode, the process proceeds to step 152, and if the mode is the self-timer mode, the process proceeds to step 163.

[Step 152] Determine whether the 4th bit of register RL is 1. At the time of ■, the self-timer mode was in effect until then, so the process goes to step 153 and the O
Since it was the drive mode at the time, the process advances to step 155.

[Step 153] When this step is reached, it means that the photographer has switched the self-drive changeover switch 5wM0DE from the self-timer mode to the drive mode. Therefore, the contents of the register RL are set to O to set the first drive mode, that is, the single-shot high-speed mode.

[Step 154] Output the contents of register RL.
) PLO to PI, output from 3 and displayed on 1 display LCD. Then, return to 5TART.

[Step 155] Selection switch s w S T E
Determine the PF6 human power from P. At the time of PF6-1,
Since neither the self-drive selector switch 5wM0DE nor the selection switch swSTEP is utilized, the process returns to 5TART. When PF6=O, the selection switch 5w5TEP is pressed, so the process advances to step 156.

[Step 156] The third bit of register RL is 1,
That is, it is determined whether or not automatic gear shifting is being performed.

If the automatic transmission is in effect, the process proceeds to step 157; if not, the process proceeds to step 158.

[Step 157] Performs an AND operation on the contents of register RL and 1, and stores the result in register RL again. This means that the 2nd, 3rd, and 4th bits are O.
This is equivalent to canceling automatic gear shifting.

Therefore, the photographer only needs to press the selection switch swSTEP once to manually cancel the automatic gear shift.

[Step 1581: If automatic gear shifting is not selected, the contents of register RL are incremented by 1 and stored again.

[Step 159] Determine whether the content of register RL is 3. Since RL=3 is not assigned to any mode, becoming 3 means that one cycle of drive modes has been completed. If it is 3, the process proceeds to step 160; if it is not 3, the process proceeds to step 161.

[Step 160] Set the contents of register RL to 0.

Steps 158, 159, 160 are single shot high speed mode →
Continuous shooting high speed mode → continuous shooting low speed mode, select switch s
This means switching every time w S T E P is suppressed.

[Step 161] The contents of the register RL are output from the output ports PLo-PL3 and displayed on the display device LCD.

[Step 162] Wait until the suppression of the selection switch swsTEP is released, and then return to 5TART.

[Step 163] Self-drive selector switch 5
Even when wM0DE is off, it is determined whether the 4th bit of register RL is 1 or not.

When the value is 1, the process goes to step 165 since the self-timer mode has been in effect until that time.

[Step 164] When this step is reached, it means that the photographer has switched the self-drive changeover switch 5wM0DE from the drive mode to the self-timer mode. Therefore, the contents of the register RL are set in OAH in hexadecimal notation to set the first mode of the self-timer modes, that is, the self-timer 10-second mode.

[Step 165] Determine the PF6 manual power from the selection switch 5w5TEP. When PF6=1, the self-drive selector switch 5wM0DE is also the selection switch s w
S TE P also means no change, so 5TA
Return to RT. When PF6=O, select switch s wS
Since TE P has been pressed, the process advances to step 166.

[Step 166] If the contents of register RL are OAH, proceed to step 167; otherwise, proceed to step 168.
, respectively.

[Step 167] A hexadecimal code OBH representing the self-timer 2-second mode is stored in the register RL.

[Step 168] A hexadecimal code OAH representing the self-timer 10-second mode is stored in the register RL.

Steps 166, 167, and 168 are self-timer 10
This means that the second mode and the self-timer 2 second mode are switched each time the selection switch 5w5TEP is depressed.

(Effects of the Invention) As explained above, according to the present invention, film winding can be carried out while the transmission ratios of the transmission systems of at least two motors that drive film winding and charging of various parts of the camera are high. A control means is provided for switching the gear ratios of all of the transmission systems to low speed by detecting abnormally low speed, and thereby the automatic speed change of the charge transmission system is linked to the automatic speed change of the winding transmission system. Automatic shifting of all the transmission systems can be performed without increasing space, cost, and electrical circuit load.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a flowchart showing part of the operation of one embodiment of the present invention, FIG. 3 is a time chart showing signals of each part of the embodiment shown in FIG. 1, and FIG. 4 is the embodiment shown in FIG. 1. FIG.
Figure 6 is a perspective view showing the charge transmission system, Figure 7 is a perspective view showing the winding transmission system, Figure 8 is a perspective view showing the rewinding transmission system, and Figure 9 is a circuit diagram showing the microcomputer and peripheral circuits. , FIG. 10 is a circuit diagram showing a drive circuit, FIG. 11 is a block diagram showing a decoder and display, FIG. 12 is a diagram showing mode codes, and FIGS. 13 to 15 are flow charts. 1...setting means, 2...controlling means, 3
, 4... Drive circuit, 5.6... Switching means, 7, 8... High speed transmission system, 9... Hoisting load, 10... ...Film, 11...
・Charge load, 12.13...Low speed transmission system,
14...Film feeding detection means, 15...
...Charge detection means, Ml...Charge motor, M2...Hoisting motor, K1...
Charge transmission system, K2... Winding transmission system, DR
I-DR3...Drive circuit, COM...
microcomputer.

Claims (1)

[Claims] 1. A camera equipped with at least two motors that respectively drive film winding and charging of various parts of the camera, and a transmission system connected to each motor, each having at least two gear ratios, and in which the gear ratios are switched. In the electric drive device, a control means is provided for switching the gear ratios of all the transmission systems to a low speed by detecting an abnormally low speed of film winding while the transmission gear ratios of the transmission systems are at a high speed. An electric drive device for a camera characterized by: