JPS6289940A - Electric driving device for camera - Google Patents

Abstract

PURPOSE:To keep always the precision of stop positions well even if a speed change ratio is switched, by performing reduction control at a reduction rate suitable for the speed change ratio. CONSTITUTION:When the state just before the completion of winding is detected, a control means 2 starts the reduction control. In case of a high-speed reduction ratio, power supply to a winding motor M2 is interrupted in 1:1 and a reduction rate g1 is 50%; and in case of a low speed reduction ratio, power supply to the winding motor M2 is interrupted in 1:2 and a reduction rate g2 is 33%. Since reduction rates g1 and g2 different from each other are set for individual reduction ratios, the reduction control suitable for the high speed reduction ratio as well as the low-speed reduction ratio is performed.

Description

Detailed Description of the Invention (Field of Application of the Invention) The present invention provides that a transmission system connected between a motor and a load has at least two speed ratios, and these speed ratios are IjJ
This invention relates to an improvement in an electric drive device for a camera that is designed to be replaceable.

(Background of the Invention) In recent years, electric drive devices using motors have been widely adopted, and the charging of the shutter and lens, film winding, rewinding, etc. are now driven by a wide motor or multiple motors, making them extremely easy to operate. I'm here too. Under such circumstances, the winding transmission system has multiple reduction ratios, and the reduction ratio can be switched depending on the power supply status, load status, etc.
A method for driving a motor in an optimal state has already been filed by the applicant Mizu. In such cases, or in cases where the reduction ratio is selected by the photographer.

By electrically detecting the completion of winding or charging and stopping the motor, mechanical 'f;'
The +l- mechanism can be made unstable. However, the motor rotates at high speed and cannot be stopped suddenly even if the stop signal is turned off. In that case, if the reduction ratio of the transmission system is different, the inertia of the transmission system including the motor will increase. Unlike,
Therefore, the time from the stop 1 signal of the motor until the driven object stops F and the overrun distance differ. In other words, in the case of a high speed reduction ratio, the inertia is small and the time to stop is short, but the overrun distance is long; in the case of a low speed reduction ratio, the inertia is large and the time to stop is short. long, but the overrun distance is short, so
If uniform deceleration control is performed without considering the deceleration ratio, it will not be possible to improve the accuracy of the stopping position.

(Object of the Invention) An object of the present invention is to solve the above-mentioned problems and provide an electric drive device for a camera that can always maintain good stopping position accuracy even when the gear ratio is changed.

(Features of the Invention) In order to achieve the above object, the present invention performs deceleration control of the motor before the stop position of the driven object, and also controls the motor deceleration during the deceleration control period in accordance with switching of the gear ratio of the transmission system. The present invention is characterized in that a control means for changing the speed is provided to perform deceleration control at a deceleration rate suitable for the gear ratio.

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

The setting means is for frame shooting, and is usually a high speed reduction ratio of the film winding transmission system. In high-speed mode and continuous shooting, normally winding 1, the reduction ratio of the barb transmission system is high, and fill 1. A quick-shooting high-speed mode that automatically switches from high-speed to low-speed depending on the winding speed and continuous shooting.

The camera is set to either a quick-shooting low-speed mode in which the reduction ratio of the winding transmission system is fixed at a low speed, and the control means 2 performs control according to the set mode. .

When set to the funeral high-speed mode or the high-speed snapshot mode, during normal film winding, the control means 2 consisting of, for example, a microcomputer operates the drive circuit 3 to rotate the winding motor M2 in one direction (for example, forward rotation). direction). As a result, the first switching stage 4 switches to the high-speed transmission system 5 having a high-speed reduction ratio (the reduction ratio is small), and the rotational force of the hoisting motor M2 passes through the high-speed transmission system 5 to the hoisting load 6.
(including the film 7), and the film 7 is wound up at a relatively high speed.

When the hoisting load 6 is loose, or when the power supply voltage drops due to the elapse of battery usage time or low ambient temperature, the control means 2 is activated by a signal from the detection-1 stage 8 that detects the rotation of the sprocket, etc. When abnormally low speed is detected, the control means 2 causes the drive circuit 3 to move the bald motor M2 in the other direction (
For example, rotate it in the reverse direction). As a result, the switching means 4 switches to the low speed transmission system 9 having a large reduction ratio (automatic speed change), and the rotational force of the winding motor M2 is transmitted to the winding load 6 via the low speed transmission system 9, and the film 7 is wound up at relatively low speed.

When the detection means 8 detects that winding is about to be completed, the control means 2 decelerates 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. When the winding completion is detected by the detection means 8 which performs the control, the control means 2 outputs a stop signal for the winding motor M2 and performs stop control.

The deceleration control will be explained in more detail with reference to the flowchart of FIG. 2 and the time chart of FIG. 3.

When set to the live shooting high-speed mode or the quick shooting high-speed mode, when the reduction ratio of 2 in the hoisting transmission system becomes high speed due to the ah-shape motor M2 being driven in the IF rotation direction, the deceleration ratio is increased to high speed in conjunction with this. Set to gl for reduction ratio. When the continuous shooting low speed mode is set, when the winding motor M2 is driven in the reverse direction and the winding transmission system has a low speed reduction ratio of 2, the speed reduction ratio is changed to gl for the low speed reduction ratio. Set. The deceleration rate gr is set to be larger than the deceleration rate g2.

The deceleration control is performed in the timer-interrupted process along with abnormally low speed detection, automatic gear change, and stop control. The timer interwoven process is repeatedly performed by interrupting the main routine at fixed time intervals set by the interwoven river timer. In the motor drive period before the deceleration control period,
Abnormally low speed detection is performed by timer-interrupted processing. As shown in FIG. 3, the pulse period 1. However, when the speed reduction ratio is high, a detection reference time is monitored, and when the speed reduction ratio is low, the detection reference time is monitored to see if it exceeds another detection reference time, and when the speed is exceeded, an abnormally low speed is detected. If no detection is detected, the interlaced timer (not shown) is set again and the process returns to the main routine. When an abnormally low speed is detected in the abnormally low speed detection process, the control means 2
determines whether the reduction ratio is high speed or low speed, and when the reduction ratio is high, switches the reduction ratio to low speed by driving the S dirt motor M2 in the reverse direction.
Change the deceleration rate to g2 for low speed reduction ratio. After that, start the interactive timer and return to the main routine. When the speed reduction ratio is low, abnormally low speed is determined to be the end of the film.

Such an abnormally low speed detection process is repeated until it is detected that winding is about to be completed.

When it is detected that winding is about to be completed, the control means 2 starts deceleration control. FIG. 3 shows an example in which deceleration control is performed by changing the motor drive signal in a duty manner. In this example, the high speed deceleration LL II! Volume 1-
The energization time of the hoisting motor M2 is intermittent at 11.1 cases of 1:l, and the deceleration rate g1 becomes 50%. At low speed reduction ratio, the energization time of the hoisting motor M2 is intermittent at 1:1 of 1:1, and the deceleration rate g1 becomes 50%. The deceleration rate g2 becomes 33%. Note that during the deceleration control, abnormally low speed is detected by another abnormally low speed detection process, but this is not directly related to the present invention, so the description thereof will be omitted here.

Since different deceleration rates g++gz are set for each reduction ratio in this way, appropriate deceleration control can be performed respectively at high speed reduction ratios and at low speed reduction ratios.

Note that the switching means 4, the high-speed transmission system 5, and the low-speed transmission system 9 constitute the hoisting transmission system 2, but the high-speed transmission system 5 and the low-speed transmission system 9 may share a part of the reduction gear train, In that case, the switching means 4 is inserted in the middle of the transmission system 5.9.

In this embodiment, the reduction ratio of 2 in the hoisting transmission system is switched by switching the rotational direction of the hoisting motor M2, 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. Furthermore, deceleration control can also be performed by reducing (or reducing stepwise) the drive voltage of the motor.

In this embodiment, the present invention is applied to the winding-beard motor M2, but the present invention can also be applied to a charging motor or a motor that drives winding, rewinding, and charging in one unit.

Examples of an electric drive device for a camera embodying the first IN illustrated embodiment 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 charging of the shutter, the aperture adjustment mechanism, the aperture drive mechanism, and the mirror lifting mechanism, and is arranged at the outer end of the [E-plane] of the camera 20. Although the charge motor M1 has little load variation due to environmental conditions, the absolute load is large, so a relatively thick 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 structure for winding the film.
&22, and adjacent to the winding 1, 2 is arranged in the ridge transmission system. The rewind L motor M3 is arranged on the front right side of the camera 20, that is, on the cartridge side, and the rewind L motor M3 is arranged adjacent to the rewind L motor M3 in the rewind transmission system. 23 is the power supply battery, which consists of four 3-type batteries.

FIG. 5 is a diagram showing the arrangement of each motor of the maki 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 rate of the film 30.

FIG. 6 shows details of the charge motor M1 and charge transmission system Kl.

The pinion gear 101 is fixed to the output shaft of the charge motor M1 and meshes with the gear 102. The gears 102 and 103 constitute a two-stage gear, and are each supported by a shaft 114 mounted on a base plate 117 to rotate oTfl. Gear 102, 10
3 have protrusions 10 that alternately protrude in the thrust direction.
2a, 103a are formed, and these protrusions 102a, 103
Due to the fitting of a, 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
It has a surface that comes into contact with a planetary lever 106 that rotates about 14, and comes into frictional contact with the robust planetary lever 106 by a compression spring 104 disposed between gears 102 and 103. As a result, the planetary lever 106 rotates following the rotational direction of the gear 103. The gear 105 is rotatably supported by a shaft 115 mounted on the planetary lever 106, and always meshes with the gear 103. The gear 107 includes a large gear 107a and a small gear (not shown) fixedly formed on the upper part of the gear 107a. It constitutes a two-stage gear that is rotatably supported by a shaft lll set on the main plate l17, and when the gear 103 rotates clockwise and the gear 105 rotates counterclockwise (in the direction of the arrow), the M star bar 10
6 rotates clockwise, and the large gear 107a meshes with the gear 105. The gear 108 is connected to the shaft 11 mounted on the base plate 117.
It is rotatably supported by a large gear 108a and a small gear (not shown) fixedly formed on a part of the large gear 108a. The large gear 108a is always engaged 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 is always engaged with the gear 103.The gear 103 rotates counterclockwise. When the planetary lever 106 rotates counterclockwise, the gear 110 meshes with the large gear 108a. The cam gear 109 is rotatably supported by a shaft 124 which is provided on the base plate 117.
9a and a cam l13 are formed. The gear 109a is always engaged with the small gear of the gear 108, and the transmission system from the pinion gear lot to the cam gear 109 is switched depending on the rotational direction of the charge motor M1. That is, when the charge motor Ml rotates counterclockwise, each part rotates in the direction of the solid line arrow, and as the planetary lever 106 rotates clockwise, the pinion gear lO1 → gears 102, 103 → gear 105 → gear 107 (large Gear 107a, small gear) → Gear 108 (large gear 108a, small gear) → Cam gear 109
The transmission is switched to a low-speed gear train with a large reduction ratio.

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 (large gear 108a,
(small gear)→Switch to a high speed gear train with a small reduction ratio consisting of 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 Ml rotates.

The first shutter charge lever 118 is rotatably supported by a shaft 125 mounted on the IT plate 117, and a rotatable roller 119 is attached to one end of one lever by a shaft 118a, and one end of the other lever is forms a cam l 18b.

The roller 119 slides on the cam surface on the outer periphery of the cam 113 of the cam gear 109, and the rocking motion that follows the cam displacement of the cam surface is applied to the first shutter charge lever 118! Get 1. and,
This swing also causes the cam 118b to swing. The second shutter charge lever 120 is rotatably supported by a shaft 127 mounted on the base plate 117.
It has rollers 121 whose rotational axis is a.

The roller 121 is engaged with the cam 118b, and the swinging of the first shank charge lever 8-118 allows the second shutter charge lever 120 to swing. and,
The second shank charge lever 120 charges a known shutter mechanism (not shown).

The lever 122 is a lever that charges a known aperture adjustment mechanism, a mirror elevating mechanism, a lens aperture drive mechanism, etc., and is rotatably supported by a shaft 126 mounted on the base plate 117. 11 rotary rollers 123
is attached by a shaft 122a, and this roller 123 engages with a cam 118c of the first shank charge lever 118. Therefore, the shutter 8-122 also swings following the swinging of the first shutter charger 8-118 to charge the diaphragm adjustment mechanism, the mirror shutter 1 lowering mechanism, and the like.

SO is a contact piece member that is fixed to the cam gear 109 and constitutes a switch with a pulse signal board (not shown) consisting of a comb-like 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.

The pinion gear 201 is fixed to the output shaft of the winding motor M2 located within the spool arrangement 22. gear 2
02 is a two-stage gear having a large gear 202a and a small gear 202b, which is pivotally supported by a rotatable f gear, and the large gear 202a meshes with the binion gear 201. Gear 203 is a large gear 203
A and small gear 203b are two-stage gears that rotate rI.
The large gear 203a meshes with the small gear 202b, and the gear 204 is supported by the large gear 204a and the small gear 204.
A two-stage gear 20 with b, which is rotatably supported by f, and a large gear 204a meshes with a small gear 203b.
Further, an MJjN lever 219a is mounted on the center shaft of bearing 2.
A compression spring 220 is arranged 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. Planetary lever 21
9a, there are two gears 205 having a large gear 205a and a small gear 205b, and a two-stage gear 205 having a large gear 208a and a small gear (not shown) fixedly formed below the large gear 208a.
08 is attached to the rotating shaft 4. 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, a coil spring 215 is arranged between the large gear 206a and the small gear 206b to provide a one-way launch function, and one end of the coil spring 215 is attached to the large gear 206a.
The coil spring 215 is fixed to the post 206c of the small gear 206 as the large gear 206a rotates clockwise.
Tighten the shaft part b and rotate them together. Gear 207 is in constant mesh with small gear 206b and rotates sprocket arrangement 29 by shaft 216. Sprocket configuration 29
consists of sprockets 29a, 29b and a shaft 29c.

The gear 207 has a pulse signal board P whose entire circumference is divided into 12 equal parts.
2 is fixed, and when the sprockets 29a and 29b rotate once, 12 pulses are obtained via the contact member S2. Therefore, there are six sprockets 29a and 29b, and in a 35 mm full size camera, one frame of film is fed by 4x3 rotations, so the number of pulses obtained via the armature member 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 rotates +r((
It is pivoted by @. Spool gear 210 has spool configuration 2
It is fixed to the spool 211 of No. 2, is pivotally supported by the rotation or r@, and always meshes with the small gear 209b. A rubber member 211a is attached to the entire surface of the spool 211 to promote automatic winding of the film. Furthermore, near the outside of the spool 211, @2 is provided at the fixing part of the camera.
13, the cover 212 is arranged so that it can be rotated.
The cover 212 is pressed toward the spool 211 by a spring 214, and functions to promote automatic winding of the film onto the spool 211. Note that although only one set of the cover 212, shaft 213, and spring 214 is illustrated, another set is arranged on the opposite side.

The rotation of the sprocket 29b is transmitted to the gear 217 by the connected shaft, and further transmitted to the detection gear 218 meshing with the gear 217. The ratio of the number of gears 217 and detection gears 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 a pulse from the contact member S4, it is stopped quickly.

If the winding motor M2 is controlled by a pulse generated during one rotation of the detection gear 218, one frame of film will be 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 #Ra ratio should remain 3:4, the pulse signal board P3 should be divided into two, and the pulse signal board P3 should be divided into two equal parts, and the pulse signal board P3 should be to 1
By generating pulses, the amount of film feeding per time can be reduced to half the size. Also, in this case,
If the winding motor M2 is stopped when two pulses are counted, it is possible to increase the film feed amount to the full size. Furthermore, by changing the number of pulses to be counted between 1 and 2, it is possible to easily accommodate full size and half size.

Transmission of the rotational force of the winding motor M2 will be explained.

When the winding motor M2 rotates counterclockwise, each part rotates in the direction of the solid line arrow, and the gear 204 rotates clockwise to rotate the planetary lever 219a clockwise, causing the small gear 20 to rotate clockwise.
5b to the large gear 206a, and the gear 20
The small gear 8 is meshed with the large gear 209a. Therefore, the rotation of the winding motor M2 is caused by the rotation of the pinion gear 201→
Gear 202 (large gear 202a, small gear 202b) - Gear 203 (large gear 203a, small gear 2'03b) → Gear 2
04 (large gear 204a, small gear 204b) → gear 205
(large gear 205a, small gear 205b), gear 206 (
Large gear 206a, small gear 206b), gear 207 → sprockets 29a, 29b at a low speed reduction ratio, and gear 204 (large gear 204a, small gear 204b)
→ Gear 208 (large gear 208a, small gear) → Gear 20
9 (large gear 209a, small gear 209b) → spool gear 210 → transmitted to 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, the pinion gear 201→gear 2
02 (large gear 202a, small gear 202b) → gear 203
(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, sprockets 29a, 29
The transmission system to b is cut off, and the sprockets 29a and 29b become free to rotate.

] As shown in 2, the spool configuration 22 of the hoisting motor M2
The direction transmission system provides 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 high speed reduction ratio is obtained when rotating clockwise. 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, and the winding transmission system has a reduction ratio of 2 switched to the low speed side, and the sprocket structure 29 and the spool structure 22 are rotationally driven at low speed. will be held. Each subsequent t
! ! When moving pieces after the shadow? When the i-shot high-speed mode or the quick-shot high-speed mode is set and in the normal state, the winding motor M2 is rotated clockwise and the reduction ratio of 2 is switched to the high speed side in the winding transmission system. Only the spool arrangement 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 a-L motor M2 is rotated counterclockwise, and the sprocket configuration 2 is rotated counterclockwise.
Both the sprocket structure 9 and the spool structure 22 are rotationally driven, but since the reduction ratio of the transmission system is set so that the circumferential speed of the spool structure 22 is higher than the J, ', I speed of the sprocket structures I & 29, the sprocket structure There is no problem since arrangement 29 is driven by the film being wound onto spool arrangement 22. Therefore, the sprocket arrangement 29 is.

It drives the film only when the film is not being wound by the spool arrangement 22, but otherwise follows the film regardless of the direction of rotation of the wind-up motor M2.

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

Pinion gear 301 is fixed to the output shaft of 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
02a meshes with pinion gear 301. The gear 303 is a two-stage gear having a large gear 303a and a small gear 303b.
The compression spring 305 is disposed between the small gear 303b and the planet 8-306,
The Kyusei lever 306 and the large gear 303a are brought into frictional contact. Due to this frictional contact, the planetary lever 306 rotates in accordance with the direction of rotation of the gear 303. A large gear 304a and a small gear 304b are attached to the tip of the planetary lever 306.
A two-stage gear 304 is rotatably attached. The gear 307 is attached to one end of the shaft 307b with a screw 307a, and a fork 308 is attached to the other end of the shaft 307b.
can be installed. The fork 308 is arranged to protrude into the cartridge storage chamber 310 and is configured to mesh with a winding shaft of a film cartridge (not shown). Axis 307b
A coil spring 309 is disposed between the receiving washer 307c and the fork 308, and the fork 308 can be temporarily retracted so that the film cartridge can be easily stored in the cartridge storage chamber 310.

When the rewind motor M3 rotates clockwise, the gear 303
rotates clockwise to rotate the planetary lever 306 clockwise to engage the small gear 304b with the gear 307,
Therefore, pinion gear 301 - gear 302 (large gear 30
2a, small gear 302b) - gear 303 (large gear 303a)
, small gear 303b) → gear 304 (large gear 304a)
, small gear 304b)→gear 307→fork 308. On the other hand, when the rewind motor M3 rotates counterclockwise, the planetary lever 306 rotates counterclockwise, the meshing between the small gear 304b and the gear 307 is cut off, and the rotational force is reduced. Therefore, by rotating the rewind motor M3 in a counterclockwise direction, the rewind transmission system 3 and the rewind motor M3 are transmitted to the rewind transmission system when the film is wound by the winding motor M2. It is possible to avoid applying it to the load, making it easy to wind the film under a low load.

Figure 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 the reflected light from the subject,
The received light signal is input to a high impedance operational amplifier OP1 having a compression diode Dl connected to a feedback circuit.

The operational amplifier OPI receives logarithmically compressed object brightness information By
is output via resistor R1. Variable resistors VR1 and VH2 connected to constant voltage source vGl output film sensitivity information Sv and aperture value information Av. The operational amplifier OP2 to which the resistor R2 is connected to the feedback circuit receives the shutter time information Tv=
(Bv+5v-Av) is calculated and output. The shutter speed information Tv is converted into a 4-bit digital value by the A/D converter/hater ADC, and then sent to the decoder driver DCD.
is displayed on the display device DSP in the finder, and is also displayed on the input port PGO-P of the microcomputer COM.
Input to G3. In addition, the 4-bit code 0001~
1000 corresponds to 1/1000 second to 1/8 second, and codes 0000 and 1001 or more correspond to warning display elements.

When the first stroke of the release button turns on the first stroker inch swl connected to the input port PF7, the potential of the output port PE3 becomes high level, so the transistor TRI is turned on by the inverter 11 and resistor R3. Voltage from battery vbt is supplied to each circuit as power supply voltage Vcc. The arrow ↑ in the figure is V
It refers to cc, and circuit pro 1 is not marked with an arrow ↑.
．． Naturally, the power supply voltage Vcc is also supplied to, for example, an operational amplifier, an A/D converter, and the like. 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 xi.
is connected, power supply voltage VDD is applied to terminal VDD,
Terminal GND is grounded.

The input boat PAO-PA3 has a second release button.
2nd stroke switch s turned on by stroke
w2, mirror up switch SwMRUP, which turns off when the mirror is up and turns on when the mirror is down; front curtain switch swcN1, which turns off when the front curtain is running, and turns on when charging is completed
．． A rear curtain switch 5wCN2 is connected, which is turned off when the rear curtain travel is completed and turned on when charging is completed.

input capo) PFO-PF4 has a pulse signal board P2
and a first film switch swFLM1 consisting of a contact member S2 (FIG. 7), a pulse signal board P3, and a contact member S
The second film switch swFLM consists of 3 (Fig. 7)
2. A third component consisting of a pulse signal board P3 and a contact piece member S4.
Film switch swFLM3, cam gear 109 (6th
The first charge switch swcGE1 consists of a pulse signal board and a contact piece SO, which are fixedly attached to the same pulse signal board and the contact piece SO, and turns on just before charging is completed.The first charge switch swcGE1 consists of the same pulse signal board and contact piece S1, and turns on when charging is completed. A second charge switch swCGE2 is connected respectively. Further, a self-drive changeover switch sWMODE is connected to the input port PF5, which is turned off when the self-timer mode S is set and turned on when the drive mode D is set. Inlet capo-1-PF6
The self-second time in self-timer mode S (2 seconds,
10 seconds) or a push-button selection switch s wS TE P that is pressed when a mode (single shooting high speed, rapid shooting high speed, continuous shooting low speed) in drive mode D is selected is connected. The self-drive selector switch 5wM0DE and the selection switch 5WSTEP are the setting means 1 in FIG.
The camera body is located at an easy-to-operate position,
For example, it is provided on the front right side of the lens.

Output capo) PEO-PE2 has transistors TR2 to T.
The base of R4 is connected, and the transistors TR2 to TR4
is the first clamping magnet with Mizuku magnet that starts the mechanical release operation (the first curtain magnet that drives the first curtain MGO1)
It controls the energization of the trailing curtain magnet MG1 and the trailing curtain magnet MG2 that causes the trailing curtain to travel.

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 that drives a rewind motor M3 is connected to ct, and a drive circuit DRI that drives a charge motor Ml is connected to output ports PDo and PDI.

The drive circuits DHI to DR3 have the same circuit configuration, and the circuit configuration is shown in FIG. A 2-bit signal is input to input terminals A and B. First, A=1. If B=O, the signal at input terminal B is inverted by inverter IIO, so the output of AND gate A12 becomes 1, the output of OR gate 0RIO also becomes 1, and 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, the output of OR game 1-0RII (7) is also 1, and the output of inverter 112 is 0. As a result, transistors TR30 and TR33 are turned on, current flows in the opposite direction to the motor M, and the motor M rotates in the opposite direction.

When A=l and B=1, the output of AND gate All is 1
, the outputs of the OR gates 0RIO and ORI1 also become 1, so that the transistors TR32 and TR33 are turned on. Therefore, when the motor M is rotating, if this mode 1 is rubbed, the diodes DIO, Dll and the transistors TR32, TR33 cut off the current, and the terminal The inertial rotation of the motor M is braked.

If A=O, B=O, Antogame) AIO~A12
All outputs become O, and transistors TR30 to TR
33 are all turned off, and the motor M is in an open state.

Returning to the explanation of FIG. 9. Output port) PLO-PL3 outputs a 4-bit binary signal from register RL in microcomputer C0M, and output port CLKOUT outputs a low frequency signal of about 2Hz, which is obtained by dividing the fundamental frequency of crystal oscillator QZ. Outputs a black 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 gate 21,0
Consists of R22. 2a - Hex decoder DEC is the first
As shown in FIG. 2, a 4-bit binary signal is converted into a hexadecimal signal, and the 5-display LCD turns on or blinks the display elements L1 to L5 in response to a 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.

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

[Step 1] Input capo) Input from PF7 below C
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 to turn on the transistor TRI (FIG. 9) and supply the power supply 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=PA
Since 3=O, the FA large input hexadecimal value is 0OHO. If the FA large input is OOH, the release sequence is entered and the process proceeds 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, and photometry and its display are only performed.

[Step 4] The apex value Tv (input to the PC) of the shutter speed in seconds converted to a 4-bit digital value by the A/D converter ADC is sent to the microcomputer CO.
It is stored in register RG inside M.

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

[Step 6] Branch instruction based on the data of the 1st bit of register RL. If the 1st bit data is 0,
Since the self-timer seconds is 10 seconds, proceed to step 7, and if it is 1, the self-timer seconds is 2 seconds, so
Proceed to step 8.

[Step 7: Count 10 seconds with a timer.

[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
The EO output is set to O, and the first tension magnet MGO is de-energized. 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 waiting routine until the mirror is raised. When mirror up is done, step 1
Proceed to step 1. This routine is provided to operate the shutter after confirming that the mirror is up.

[Step 11] Determine flag FO. FO=1
indicates the end of the film.

[Step 12] Determine flag F1. F1=0 represents recognition of film stop at the completion of winding.

[Step 13] The contents of the register RG in which the shank seconds were stored in Step 4 are data-converted into a multiple series value. Since the value recorded 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 leading magnet MGl. 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 brain 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=O,
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 5wCN2 to be turned off, that is, the trailing curtain running is completed. When running is completed,
Proceed to step 18.

[Step 18] Determine whether the contents of register RL are smaller than 2 or greater than or equal to 2. From Fig. 12, if it is less than 2, it is either single shooting high speed mode or continuous shooting high speed mode.
In both cases, the reduction ratio is high, 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] By setting PDO=O and PD1=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] By setting PBO=O and PBl=1, the drive circuit DR2 is operated, and the hoisting motor M2 is rotated in the direction in which the reduction ratio of 2 (FIG. 7) in the hoisting transmission system becomes high speed. This allows the film to be wound at high speed.

[Step 21] A constant PI 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 M1 for a high speed reduction ratio is stored in a register RM related to detection of a decrease in hoisting speed.

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

[Step 23] By setting PBO=1 and PB1=O, the 1st hoisting motor M2 is rotated in the direction in which the 2nd reduction ratio of the hoisting gear transmission system becomes low.

[Step 24] Store the constant P2 for the low speed reduction ratio in the register RP, and store the constant M2 for the low speed reduction ratio in the register RM.

[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 stored in the respective registers. For example, the contents of register RMM are constant M for high speed reduction ratio.
1, and in the case of a low speed reduction ratio, it becomes a constant M2.゛Set flag FO=F2=O, Fl=1.

Setting F1=1 means that the winding operation will start now. Flag F2 is the first film switch sw
Represents the on/off state of FLM1.

[Step 26] Timer TM for timer interconnected
Set constant K to H. The values of are determined by the film winding speed, the equal fraction of the pulse signal board P2 (FIG. 7) of the first film switch swFLM1, and the microcomputer C.
It is a constant determined by the OM instruction cycle time.

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.

r Timer interwoven processing A step lot] Stops the decrementing operation of timer TMR and prohibits interworking.

[Step 102] Input the manual power of PF2 from the third film switch swFLM3, which is turned on every time the winding of one frame of film is completed. In this case, it is assumed that the winding motor M2 has already been driven in step 20 or 23, and that the third film switch FLM3 is turned off in the first timer interaction, and the process proceeds to step 103.

[Step 103] A branch is executed 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 s w F L M 2 is provided to reduce the speed of the winding motor M2 immediately before winding is completed, thereby improving the accuracy of stop control. In the unembodied example, deceleration is performed by duty control, but deceleration may be performed by low voltage. 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.

[Step 105] Determine flag F2. Since F2=0 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 whether R, MM=O. In the program up to now, RMM=M1 (M2)-1, so if constant eM1 (M2) is a somewhat large value, it will not become 0, so proceed to step 108.

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

[Stay 7' 109] Return to the original running program. (Timer Mine Club) - Processing is done by setting three film switches SwFL at regular intervals from the running program.
The purpose is to determine the status of Ml, swFLM2, and SWFLM3 (7). 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, 5 steps 104
The process then proceeds to step 110.

[Step 11O] Determine whether flag F2=1. Since F2 is set to 0 in step 25, the process advances to step 111.

[Step 1111 Set flag F2 to 1. This means that the first film switch s w F L M 1 has been turned off, that is, PFO=1.

[Step 112] If it is determined in step 105 that F2=1, the contents of the flag F2 are set to the first film switch s.
In order to match wFLM1 to on, flag F2 is set to O here.

[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 executed for a while, and now it is just before the winding of one frame. At this time, the second film switch Sw F L M 2 is turned on, so PF1=0, and the process advances from step 103 to step 114.

[Step 114] Determine whether the contents of register RFP are smaller than 3F or larger than P. Register RFP is used to adjust the duty ratio of duty control. As explained in steps 21, 24 and 25, initially the contents of register RFP are constant e! IPi (for high-speed reduction ratio) or P2 (for low-speed reduction ratio), and since these values are set larger than the constant P, the process initially proceeds to step 115.

[Step 115] Set PBO=l and 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 the register HD 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 PB1=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=0, the winding motor M2 is connected to the winding transmission system.
Rotate in the direction where the reduction ratio becomes low to perform low-speed winding.

[Step 122] Determine whether the contents of register RFP are 0. If not O, then Ste.

The routine advances to block 116 and the routine described in ti1 is executed. When it becomes 0, the process advances to step 123.

[Step 123: The contents of register RP (constant P1 or P2) are stored again in register RFP.

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 equal to or greater than the constant 2, the current to the winding motor M2 is cut off and the brake is applied, and when it is smaller than the constant P, the current is applied to the winding motor M2 and the value becomes 0. In this case, the original value is stored in the register RFP and then repeated. Therefore, the duty ratio is determined by the constant of the timer TMR and the constant P1 or P2 set in the register RFP, and does not depend on whether the first film switch swFTM1 is turned on or off.

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. This point is
This is a feature of the present invention as well as changing the contents of the register RP in step 135, which will be described later. Furthermore, if constant P2 is set to a value smaller than constant P, for example O, then
Since step 114 always advances to step 119,
It is possible to avoid duty control 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 completed, the third film switch swFL
M3 turns on. At this time, the timer-interrupted process branches from step 102 to step 124.

[Step 1241 PBO=1. Set PB1=1. As a result, the winding motor M2 is de-energized 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 Sl for the high speed reduction ratio is subtracted from the contents of the register R5 that were first written to the constant S in step 25, and the result is stored in the register R5 again. The register RS is used to set the authorized times TI and T2 from the stop signal of the winding motor M2 until the film is determined to have stopped at a high speed reduction ratio and at a low speed reduction ratio.

[Step 127] Similarly to step 126, the constant 32 for low speed reduction ratio is subtracted from the contents of the register RS, and the result is stored in the register R3 again.

[Step 128] Determine whether the contents of register R5 are less than 1 or greater than 1. If it is 1 or more, it means that the certified time T1 or T2 has not passed yet.
Proceed to step 108 and execute the routine described above. l
If it is smaller, it means that the certified time T1 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 0.

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 constants SL and S2. Therefore, at a high speed reduction ratio with low inertia, compared to a low speed reduction ratio with high inertia, it is possible to recognize that the film has stopped at the iu time, 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, the timer clock will not be activated thereafter.

Next, let us consider a situation where, while the winding motor M2 is being driven, the upper voltage of the power supply' decreases, 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 again 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 until the contents of register RMM become 0. In this way, an abnormally slow film winding speed is detected. This process proceeds from step 107 to step 130. In addition,
The value of the register RM that initializes the register RMM needs to be determined independently between the high speed reduction ratio and the low speed reduction ratio because the film winding speed is different. , M2.

The timeout routine for detecting abnormally low film winding speed, which is comprised of steps 104-107 and 110-113, is not used during the duty control period. The reason is that the last step of the duty control routine is step 116.
, 123, the number of program steps for the timer inclination processing increases, the time required to return to the main routine increases, and, for example, the timing of applying the brake of the charge motor M1 becomes 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. When the film winding speed decreases at a high speed reduction ratio, film winding becomes possible by switching the speed 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 131] Determine the PF4 manual power indicating the state of the second chassis inch 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 this step 2 is reached, the film winding speed has decreased at a low speed reduction ratio, so as explained in step 130, the film has finished. Therefore, PBO=O,
By setting PBl=O, 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 has not been completed, PDO=l and PD1=0 to rotate the charge motor Ml in the direction of switching the reduction ratio of the charge transmission system Kl (Fig. 6) to a low speed. Perform CH+')-J at low speed.

[Step 134] By setting PBO=1 and PB1=O, the hoisting motor M2 is rotated in the direction of switching the reduction ratio of 2 (Fig. 7) in the 1st hoisting transmission system to a low speed, and winding is performed at a low speed.

Step 135] Since the reduction ratio was automatically switched from high speed to low speed in steps 133 and 134, the third bit of register RL (FIG. 12) is set to 1 to change to automatic speed change mode. At the same time, the contents of register RL are output 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, constant P2 for low speed reduction ratio is set in register RP, and register RFP is initialized to constant 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 program advances to step 108 and executes the routine described above.

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] 1st charge switch swCGEL
Determine the PF3 manual power connected to.

Just before charging is complete, press the first charge switch sw.
Wait until cGEl is turned on and proceed to step 28.

[Step 28] 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 29, and when the reduction ratio is low, the process proceeds to step 30.

[Step 29] Since this is a high speed reduction ratio, the power to the charge motor M1 is cut off and the brake is applied. This is to prevent charge motor M1 from continuing to rotate due to inertia and overcharging when charging is completed and the brake is applied to charge motor M1, since charging is performed at high speed. The brake is applied 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=PDl=1.

This cuts off the power to the charge motor Ml and applies the brakes.

[Step 32: Determine the flag FO indicating the end of the film. 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 continuous shooting high-speed mode is in effect. If it is the snapshot high speed mode, 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 Fl=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 LO, 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 is repeated many times, and if it is determined that the film has stopped upon completion of winding, the process proceeds to the next shutter opening control. At step 12, if the film has not yet been recognized as stopped at the time of winding completion, the loop of steps 11 and 12 is repeated, and the process waits for the film to be stopped in the timer-interrupted process. The above is the routine for continuous shooting high speed mode.

[Step 34] If the mode is other than M-shot high-speed mode, the film is stopped until the film is recognized as being stopped at the completion of winding (flag F1
) until becomes O.

[Step 35] It is determined whether the content of register RL is 5, that is, continuous shooting automatic speed change mode. If it is in the quick-shot automatic shift mode, jump to NEXT (step 3). Otherwise, proceed to step 36.

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

[Step 37] The 4th bit of register RL is 1.
, that is, it is determined whether the self-timer mode is selected.

If it is a self-timer mote, jump to NEXT. Otherwise, proceed to step 38. Self-timer mode has the same routine as 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 when you are in single-shot high-speed mode or single-shot automatic transmission mode, so the m1 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 at 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 amplifier completes 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.

[Stay, block 39] Set PCO=O, PO2-4, energize the rewind motor M3 via the drive circuit DR3,
Start rewinding.

[Step 40] Set constant M3 to register RM.

[Steps 41-48] Steps lO4- in Fig. 14
It 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 l
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] Set the flag FO indicating the end of the film to 0.
Reset to .

[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 mode to single-shot high-speed mode or continuous-shot high-speed mode, and if the film is changed or the external environment (especially temperature) changes, the next shot will be set to a 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 aperture ends early, and winding is not yet completed, and the first tension magnet MGO for the next shooting operation is energized in step 9. Let's think about what happens when the film ends.

In this case, since the mechanical release operation has been activated by the first tension magnet MGO, narrowing down and mirror amplification are performed, but the film stops midway through winding and is not wound any further. film switch s
w F L M 3 remains off. therefore,
If the film is rewound in this state, the photographer may misunderstand that the shutter is open and may make a mistake. Furthermore, if strong light rays enter through the lens, there is a risk of fogging the film. Therefore, it is best to lower the mirror 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-included processing,
In order to set the flag FO=1 in step 132, the process branches to step 52 in step 11.

[Step 52] Set PDO=l and PD1=O, and rotate the charge motor Ml in the direction in which the reduction ratio of 1 in the charge transmission system becomes low speed. The rotation direction of the charge motor M1 may be switched depending on the set mode. Next, the program jumps to step 30, confirms the completion of charging, and proceeds to steps 31, 32, and 39, and enters rewind control.

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

[Step 150] Set the output boat PE3 to O. This turns off the transistor TRI (FIG. 9) and turns off the power supply voltage Vcc. Photometry is stopped and power is saved. Note that the power supply voltage V. 0 is alive.

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

[Step 152] 4th column 2nd or 1 of register RL
Determine whether or not. 1, the machine was in self-timer mode at that time, so proceed to step 153.
When it is 0, it is the drive mode, so step 155
Proceed to.

[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] The contents of register RL are output from output ports PLO to PL3 and displayed on 1 display LCD. Then, return to 5TART.

[Step 155] Determine the PF6 manual power from the selection switch 5w5TEP. When PF6=1, the self-drive selector switch 5wM0DE is also the selection switch 5w5.
TEP also means there is no change, so return to 5TART. When PF6=O, the selection switch 5w5TEP is pressed, so the process advances to step 156.

[Step 156 The third hit 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 158] If the automatic gear shift is not set, the contents of the 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 O.

Steps 158, 159, and 160 are single-shot high-speed mode →
Continuous shooting high speed mode → continuous shooting low speed mode, select switch 5w
This means switching every 5 TEP suppression.

[Step 161] Output the contents of register RL -1
- PLO - Output from PL3 and display on the display device LCD.

[Step 162] Wait until the suppression of selection switch 5w5TEP 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 it is 1, the process goes to step 165 because the mode was in self-timer mode until then, and when it is 0, the process goes to step 164 because it was in the drive mode.

[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 mote of the self-timer modes, that is, the self-timer 10-second mode.

[Step 165] Selection switch 1. Determine the PF6 manpower from Chi5w5TEP. When PF6-1, self-
Drive selection switch 5wM0DE also selection switch 5w
5TEP also means no change, so 5TART
Return to When PF6=O, select switch 5w5TEP
Since is pressed, proceed to step 166.

[Stella 7'166] The contents of register RL are OAH
If so, go to step 167, otherwise go to step 1
68, respectively.

[Stair 7'167] Store the hexadecimal code OBH representing the self-timer 2-second mode in the register RL.

[Step 188] Add cell 7711 to register RL.
Store the hexadecimal code OAH representing 10 seconds mode.

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 s wS TE P is depressed.

(Effects of the Invention) As explained above, according to the present invention, the motor is decelerated before the stop position of the driven object, and the motor is Since a control means for changing the speed is provided to perform deceleration control at a deceleration rate suitable for the gear ratio, it is possible to always maintain good stopping position accuracy even when the gear ratio is changed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing a part of the operation of the embodiment of the present invention,
3 is a time chart showing signals of each part of the embodiment shown in FIG. 1, FIG. 4 is a front view showing a camera in which the embodiment shown in FIG. 1 is embodied, and FIG. 5 is a plan view, Fig. 6 is a perspective view showing the charge transmission system, Fig. 7 is a perspective view showing the winding transmission system, Fig. 8 is a perspective view showing the rewinding transmission system, and Fig. 9 is a perspective view showing the rewinding transmission system.
The figure is a circuit diagram showing a 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 flowcharts. 1...setting means, 2...controlling means, 3
... Drive circuit, 4... Switching means, 5.
...High-speed transmission system, 6...Hoisting load, 7
...Film, 8...Detection means, 9.
...Low speed transmission system, M2...Hoisting motor, K2...Hoisting transmission system, g++gz...
...Deceleration rate, DRI~DR3...Drive circuit, C
OM...Microcomputer. Figure 1 Figure 4 Figure 5 Ml j+ Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] 1. In an electric drive device for a camera including a motor and a transmission system having at least two speed ratios and in which the speed ratios are switched, the motor is controlled to decelerate before the stop position of the driven object, and the An electric drive device for a camera, comprising a control means for changing a motor speed during a deceleration control period in accordance with switching of a gear ratio.