JPH067244B2 - camera - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention provides a transmission system connected between a motor and a load that has at least two reduction ratios, and these reduction ratios can be switched. It relates to the improvement of existing cameras.

(Background of the Invention) In recent years, electric drive devices using motors have been widely adopted, and charging of shutters and lenses, film winding, rewinding, and the like have been driven by a single motor or a plurality of motors, resulting in extremely high operability. Has also improved. Under such circumstances, the applicant has proposed that the winding transmission system or the like has a plurality of reduction ratios, and the reduction ratio is switched according to the conditions such as the power supply state and the load state to drive the motor in the optimum state. It has already been applied. In such a case, considering a film winding system, for example, it is necessary to constantly detect the film moving speed in order to switch the reduction ratio from high speed to low speed. At the same time, it is important to always detect the stop due to the end of the film.

However, if an abnormal low speed (including stop) is detected with the same detection reference level at the high speed reduction ratio and at the low speed reduction ratio, the detection reference level will be set to a considerably low value according to the low speed reduction ratio. In addition, there is a problem that the automatic switching (automatic shift) of the reduction gear ratio from high speed to low speed cannot be performed efficiently when the film moving speed is reduced. That is, the film may be fed at a speed lower than the maximum speed at the low speed reduction ratio at the high speed reduction ratio.

(Object of the Invention) An object of the present invention is to solve the above-mentioned problems, to enable efficient switching of the winding transmission system, and to more accurately determine the completion of winding of all film frames. Is to provide.

(Characteristics of the Invention) In order to achieve the above object, the present invention operates with a motor and a motor as a drive source, and has a larger reduction ratio than the first winding transmission system and the first winding transmission system. In a camera having a film winding mechanism capable of switching to a second winding transmission system, the first moving transmission system detects the moving speed of the film due to the operation of the film winding mechanism, and when the first winding transmission system drives the film. When the moving speed of the film is slower than the discriminating speed of No. 2, the transmission system is switched to the second winding transmitting system, and after the switching, the moving speed of the film by the second winding transmitting system is set to be lower than the first discriminating speed. When the speed is lower than the second determination speed, a control means for stopping the winding by the motor is provided.

(Embodiment of the Invention) FIG. 1 shows a basic configuration of an embodiment of the present invention.

The setting means 1 is a single frame shooting mode, in which the speed reduction ratio of the winding transmission system is usually high, and a single shooting high speed mode in which the film winding speed is automatically switched from high speed to low speed and continuous shooting. Therefore, the speed reduction ratio of the winding transmission system is usually high, and the continuous transmission high-speed mode automatically switches from high speed to low speed according to the decrease of the film winding speed. Is for setting the camera to any one of the continuous shooting low speed mode in which is fixed to low speed, and the control means 2 performs control according to the set mode.

When the single-shooting high-speed mode or the continuous shooting high-speed mode is set, during normal film winding, the control means 2 including, for example, a microcomputer operates the drive circuit 3 to move the winding motor M2 in one direction (for example, the forward rotation direction). ) Rotate to. As a result, the switching means 4 switches to the high speed transmission system 5 having a high speed reduction ratio (small reduction ratio), and the rotational force of the winding motor M2 is transmitted to the winding load 6 (including the film 7) via the high speed transmission system 5. The film 7 is wound up at a relatively high speed.

When the hoisting load 6 is heavy, when the power supply voltage drops due to the passage of battery usage time or a decrease in ambient temperature, the control unit 2 detects an abnormal low speed by a signal from the detection unit 8 that detects the rotation of the sprocket or the like. Then, the control means 2
Causes the drive circuit 3 to rotate the winding motor M2 in the other direction (for example, the reverse rotation direction). Thereby, the switching means 4
Is a low speed transmission system 9 having a low speed reduction ratio (large reduction ratio)
(Automatic speed change), 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 at a relatively low speed.

When the detection means 8 detects the front of the completion of winding, the control means 2 decelerates the winding motor M2 by changing the duty ratio of the drive signal to the drive circuit 3 or reducing the drive voltage level. Take control. When the detection means 8 detects the completion of winding, the control means 2 outputs a stop signal of the winding motor M2 to perform stop control.

The abnormal low speed detection (including stop) will be described in more detail with reference to the flowchart of FIG. 2 and the time chart of FIG.

When the single-shooting high-speed mode or the continuous-shooting high-speed mode is set, the winding motor M2 is driven in the forward direction to increase the speed reduction ratio of the winding transmission system K2, and in conjunction with this, abnormal low speed detection is performed. The detection reference time of is set to t ₀₁ for the high speed reduction ratio. When the continuous shooting low speed mode is set, when the speed reduction ratio of the winding transmission system K2 becomes low due to the winding motor M2 being driven in the reverse direction, the detection reference time for detecting the abnormal low speed becomes low in conjunction with it. Set to t ₀₂ for reduction ratio. The detection reference time t ₀₁ is set shorter than the detection reference time t ₀₂ . Next, the process proceeds to the abnormal low speed detection process, but this abnormal low speed detection process is performed by the timer interrupt process until the completion of winding is detected. The timer interrupt process is performed repeatedly by interrupting the main routine at a constant time interval set by the interrupt timer, and as shown in FIG. 3, it is composed of pulses generated at constant rotation angles of the sprocket. It is monitored whether the pulse period t ₁ of the winding signal exceeds the detection reference time t ₀₁ at the high speed reduction ratio and the detection reference time t ₀₂ at the low speed reduction ratio.
An abnormal low speed is detected when the speed is exceeded. When it is not detected, an interrupt timer (not shown) is set again, and then the process returns to the main routine. When the abnormal low speed is detected in the abnormal low speed detection process, the control means 2 determines whether the reduction ratio is high speed or low speed, and drives the winding motor M2 in the reverse rotation direction at the high speed reduction ratio to reduce the reduction ratio. While switching to the low speed, the detection reference time is changed to t ₀₂ for the low speed reduction ratio. After that, the interrupt timer is started and the process returns to the main routine. At the low speed reduction ratio, the abnormal low speed is discriminated as the end of the film, and since it is not necessary to perform the timer interrupt process thereafter, the interrupt timer is not started and the process returns to the main routine.

Such an abnormal low speed detection process is repeated until the completion of winding is detected.

During the deceleration control after the completion of winding is detected, the abnormal low speed is detected by another abnormal low speed detection process, but this is omitted here because it is not directly related to the present invention.

Since the detection reference times t ₀₁ and t ₀₂ are set for each reduction ratio in this way, the film winding speeds at the high speed reduction ratio and the low speed reduction ratio can be determined so as not to overlap, and automatic shifting can be performed efficiently. It can be carried out. For example, if the detection reference time t ₀₁ is set to a value corresponding to a film winding speed of 3 frames / second and the detection reference time t ₀₂ is set to a value corresponding to a film winding speed of 1 frame / second, a high speed reduction ratio is obtained. The film winding speed can be set to 4 to 3 frames / sec, and the film winding speed can be set to 2 to 1 frames / sec at a low speed reduction ratio.

In addition, the detection timer for automatic shifting and the detection timer for determining the end of film can be rationally combined.

What is important in the above-mentioned basic configuration is that the completion of winding of all the film frames (generally referred to as a film projecting state) can be accurately determined. More specifically, the state of the film when an abnormal low speed is detected while the film is wound at a reduction ratio for high speed can be roughly classified into two states. The first state is a state in which the winding load is large due to a decrease in battery voltage or low temperature, and a second state is
The state of is a state in which the winding of all the film frames is completed. In the first state, it is possible to wind the film thereafter by switching the reduction ratio to the low speed, but in the second state, it is not possible to wind the film even if the reduction ratio is switched to the low speed. Therefore, when an abnormal low speed is detected by the high speed reduction ratio, the film is wound up by the low speed reduction ratio, and when the abnormal low speed is detected again at that time, it is possible to accurately determine the completion of the winding of all frames of the film. it can.

Although the switching means 4, the high speed transmission system 5 and the low speed transmission system 9 constitute the hoisting transmission system K2, the high speed transmission system 5 and the low speed transmission system 9 may share a part of the reduction gear train. In this case, the switching means 4 is inserted in the transmission systems 5 and 9.

In the present embodiment, the speed reduction ratio of the winding transmission system K2 is switched by switching the rotation direction of the winding motor M2, but it may be switched by a magnet or the like. Further, although it is possible to switch to one of two reduction ratios, it is also possible to switch to three or more reduction ratios. Further, although the detection reference times t ₀₁ and t ₀₂ are set as the detection reference level, if the pulse period t ₁ of the winding signal is short, the number of reference pulses within a fixed time is set as the detection reference level. You may

This embodiment applies the present invention to the hoisting motor M2, but the present invention can also be applied to a charge motor or a motor that drives hoisting, rewinding and charging by one unit.

An example of an electric drive device for a camera which embodies the embodiment shown in FIG. 1 is shown in FIGS.

FIG. 4 is a diagram showing the arrangement of the motors when the camera is viewed from the front. M1 is a charge motor that controls the charge of the shutter charge and aperture adjustment mechanism, the aperture drive mechanism, and the mirror lifting mechanism, and is arranged at the left end of the front of the camera 20. The charge motor M1 has a small load fluctuation due to environmental conditions, but has a large absolute load, so that a relatively large motor is required. Therefore, the charge motor M1 is housed in a grip 21 projectingly formed at the front left end of the camera 20.
K1 is a charge transmission system for the charge motor M1.
The winding motor M2 has a spool structure 2 for winding the film.
2 and the winding transmission system K2 is arranged adjacently. The rewinding motor M3 is arranged on the right side of the front of the camera 20, that is, on the cartridge side, and the rewinding transmission system K3 is arranged adjacent to it. A power battery 23 is composed of four AA size batteries.

FIG. 5 is a diagram showing the arrangement of the motors when the camera 20 is viewed from above. Reference numeral 24 is a film cartridge, 25 is a blade type vertical shutter, 26 is a mirror elevating mechanism, 27 is a lens aperture adjusting mechanism, 28 is a lens aperture driving mechanism, and 29 is a sprocket structure for determining the feed amount of the film 30. .

FIG. 6 shows details of the charge motor M1 and the charge transmission system K1.

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 form a two-stage gear and are rotatably supported by shafts 114 that are planted on the main plate 117. The gears 102 and 103 have protrusions 102 that alternately project in the thrust direction.
a, 103a are formed, and the protrusions 102a, 103a are formed.
The gears 102 and 103 are engaged with each other in the rotation direction and are interlocked with each other, but can freely move in the thrust direction. On the other hand, the gear 103 has a surface in contact with the planetary lever 106 that rotates about the shaft 114,
A compression spring 104 arranged between the gears 102 and 103 makes frictional contact with the planet lever 106. As a result, the planetary lever 106 rotates following the rotation direction of the gear 103. The gear 105 is the shaft 1 set on the planetary lever 106.
A shaft 15 is rotatably supported by 15, and always meshes with the gear 103. The gear 107 constitutes a two-stage gear in which a large gear 107a and a small gear (not shown) fixedly formed on the upper portion thereof are rotatably supported by a shaft 111 which is planted on a main plate 117,
When the gear 103 rotates clockwise and the gear 105 rotates counterclockwise (arrow direction), the planetary lever 106 rotates clockwise and the large gear 107 a meshes with the gear 105. The gear 108 is rotatably supported by a shaft 112 erected on the main plate 117, and includes a large gear 108a and a small gear (not shown) fixedly formed on the upper portion thereof. Large gear 108a
Always meshes with the small gear of the gear 107. The gear 110 is rotatably supported by a shaft 116 installed 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. The cam gear 109 is rotatably supported by a shaft 124 erected on the main plate 117, and a gear 109a and a cam 113 are formed. The gear 109a constantly meshes with the small gear of the gear 108, and the transmission system from the pinion gear 101 to the cam gear 109 is switched depending on the rotating 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 the planetary lever 106 rotates clockwise to cause the pinion gear 101 to rotate.
→ gear 102, 103 → gear 105 → gear 107 (large gear 107a, small gear) → gear 108 (large gear 108a,
(Small gear) → switching to a low speed gear train having a large reduction ratio, which is composed of the cam gear 109. On the other hand, when the charge motor M1 rotates in the clockwise direction, each part rotates in the direction of the dotted line arrow, and the planetary lever 106 rotates in the counterclockwise direction, so that the pinion gear 101 → gear 102, 103 → gear 110 → gear 108 (larger). Gear 108a, small gear) → cam gear 109
It is switched to a high speed gear train having a small reduction ratio.
The two gear trains are set such that the cam gear 109 always rotates clockwise regardless of which direction the charge motor M1 rotates.

The first shutter charge lever 118 is rotatably supported by a shaft 125 erected on the main plate 117, a rotatable roller 119 is attached to one lever end by a shaft 118a, and the other lever end is a cam 118b. To form. The roller 119 slides on the cam surface of the outer periphery of the cam 113 of the cam gear 109 to give the first shutter charge lever 118 a swing that follows the cam displacement of the cam surface. Then, due to this swing, the cam 118b also swings. The second shutter charge lever 120 is rotatably supported by a shaft 127 erected on the main plate 117, and has a roller 121 having a shaft 120a as a rotation axis. Roller 121 is cam 118b
The second shutter charge lever 120 can be swung by swinging the first shutter charge lever 118. Then, the second shutter charge lever 120 charges a known shutter mechanism (not shown).

The lever 122 is a lever that charges a known diaphragm adjusting mechanism, a mirror elevating mechanism, a lens diaphragm driving mechanism, and the like. The lever 122 is rotatably supported by a shaft 126 erected on the main plate 117, and one lever end is provided. Rotatable roller 123 is axis 1
The roller 123 is attached to the cam 118c of the first shutter charge lever 118.
Therefore, the lever 122 is also the first shutter charge lever 1
The oscillating movement of 18 causes the oscillating movement to charge the aperture adjusting mechanism, the mirror elevating mechanism, and the like.

S0 is a contact member which is fixed to the cam gear 109 and constitutes a switch with a pulse signal substrate (not shown) formed of a comb-tooth-shaped conductive pattern, and which detects a little before the completion of charging by the charge motor M1.

S1 is also a similar contact member that forms a switch with the pulse signal board fixed to the cam gear 109, and detects the completion of charging by the charge motor M1.

FIG. 7 shows details of the winding motor M2 and the winding transmission system K2.

The pinion gear 201 is fixed to the output shaft of the hoisting motor M2 arranged in the spool structure 22. The gear 202 is a two-stage gear having a large gear 202a and a small gear 202b and is rotatably supported by the gear 202. The large gear 202a meshes with the pinion gear 201. The gear 203 is a two-stage gear having a large gear 203a and a small gear 203b and is rotatably supported by the gear 203. The large gear 203a meshes with the small gear 202b. The gear 204 has a large gear 204a and a small gear 204b.
The stepped gear is rotatably supported, and the large gear 204a meshes with the small gear 203b. A planetary lever 219a is further rotatably supported by a bearing 219b on the center axis of the two-stage gear 204, and a compression spring 220 is arranged between the small gear 204b and the bearing 219b, so that the bearing 219b and the large gear 204a are connected to each other. Friction contact. This frictional contact causes the planetary lever 219a to follow and rotate in accordance with the rotation direction of the gear 204. On the planetary lever 219a, a two-stage gear 205 having a large gear 205a and a small gear 205b.
A large gear 208a and a two-stage gear 208 having a small gear (not shown) fixedly formed on the lower portion thereof are rotatably attached. In the vicinity of the gear 205, there are two gears 2
06 is arranged, and the large gear 206a and the small gear 206b are rotatably supported independently of each other. However, a coil spring 215 for providing the function of a one-way clutch is arranged between the large gear 206a and the small gear 206b, and one end of the coil spring 215 is fixed to the boss 206c of the large gear 206a so that the large gear 206a rotates clockwise. The coil spring 215 tightens the shaft of the small gear 206b,
Rotate together. The gear 207 always meshes with the small gear 206b and causes the shaft 216 to rotate the sprocket arrangement 29. The sprocket structure 29 is a sprocket 29.
a, 29b and a shaft 29c. A pulse signal substrate P2 whose entire circumference is divided into 12 equal parts is fixed to the gear 207, and when the sprockets 29a and 29b make one rotation, 12 pulses are obtained via the contact piece member S2. Therefore, the sprocket 29a, 29b has 6 teeth, and in a 35 mm full size camera, the film for one frame is fed by 4/3 rotation, so the number of pulses obtained through the contact piece member S2 is 16
Is. Needless to say, it is possible to arbitrarily select the equal fraction of the pulse signal substrate 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 structure 22, is rotatably supported, and constantly meshes with the small gear 209b. On the surface of the spool 211, a rubber member 211a that promotes automatic winding of the film is attached to the entire circumference. Further, near the outside of the spool 211, a cover 212 that is rotatable by a shaft 213 provided in a fixed portion of the camera is arranged.
It is pressed against the spool 211 side by 4 and has a function of promoting automatic winding of the film on the spool 211. Although only one set of the cover 212, the shaft 213 and the spring 214 is shown, another set is arranged on the opposite side.

The rotation of the sprocket 29b is transmitted to the gear 217 by the coupled shaft and further transmitted to the detection gear 218 that meshes with the gear 217. The ratio of the numbers of teeth of the gear 217 and the detection gear 218 is 3: 4. A pulse signal substrate P3 that generates one pulse per rotation is fixed to the gear 218, and a pulse is obtained via the contact piece members S3 and S4. The contact piece member S3 is provided ahead of the contact piece member S4 by a predetermined phase, and the pulse output from the contact piece member S3 switches the drive of the winding motor M2 to duty drive to reduce the rotation speed. When the hoisting motor M2 is braked by the pulse from the contact piece member S4, the hoisting motor M2 is quickly stopped.

When the winding motor M2 is controlled by the pulse generated while the detection gear 218 makes one rotation, one frame of film is fed in the 35 mm full size camera. As a matter of course, the ratio of the number of teeth of the gear 217 and the detection gear 218 is set to 3: 2, or the ratio of the number of teeth is kept at 3: 4, and the pulse signal substrate P3 is divided into two equal parts and rotated every 180 degrees. If one pulse is generated for each half, the film feed amount per time can be made half size. Further, in this case, if the winding motor M2 is stopped when two pulses are counted, the film feed amount can be made full size. Further, if the number of pulse counts can be switched between one and two, it is possible to easily cope with the full size and the half size.

The transmission of the rotational force of the hoisting motor M2 will be described. When the hoisting motor M2 rotates counterclockwise, each part rotates in the direction of the solid arrow, the gear 204 rotates clockwise, and the planetary lever 219a rotates clockwise, and the small gear 205.
b is engaged with the large gear 206a, and the gear 208
The small gear of the above is meshed with the large gear 209a. Therefore, the rotation of the hoisting motor M2 is changed by the pinion gear 201 →
Gear 202 (large gear 202a, small gear 202b) → gear 203 (large gear 203a, small gear 203b) → gear 20
4 (large gear 204a, small gear 204b) → gear 205
(Large gear 205a, small gear 205b) → Gear 206 (large gear 206a, small gear 206b) → Gear 207 → Sprocket 29a, 29b is transmitted to the sprocket 29a, 29b at a low speed reduction ratio, and the gear 204 (large gear 204a, small gear 204b). ) →
Gear 208 (large gear 208a, small gear) → gear 209
(Large gear 209a, small gear 209b) → spool gear 2
10 → Spool configuration 22 transmitted at low speed reduction ratio.

On the other hand, when the winding motor M2 is rotated in the clockwise direction, each part is rotated in the direction of the dotted arrow, the gear 204 is rotated in the counterclockwise direction, the planetary lever 219a is rotated in the counterclockwise direction, and the large gear 205a is rotated. It meshes directly with the spool gear 210. Therefore, the pinion gear 201 → the 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 → spool gear 210 A high speed transmission system with a small reduction ratio is switched. The transmission system to the sprockets 29a and 29b is cut off, and the sprockets 29a and 29b are free to rotate.

As described above, the transmission system in the spool structure 22 direction of the hoisting motor M2 can obtain two types of reduction ratios depending on the rotation direction of the hoisting motor M2. A clockwise rotation results in a high speed reduction ratio. However, the spool arrangement 22 always rotates counterclockwise in either direction of rotation.

During automatic film loading, the winding motor M2 is rotated counterclockwise to switch the speed reduction ratio of the winding transmission system K2 to the low speed side, and the sprocket structure 29 and the spool structure 22 are rotationally driven at low speed. At the time of frame feeding after each shooting thereafter, when the single-shooting high-speed mode or the continuous shooting high-speed mode is set, and in the normal state, the hoisting motor M2 is rotated clockwise, and the hoisting transmission system. The reduction ratio of K2 is switched to the high speed side, and only the spool structure 22 is rotationally driven at high speed. When the reduction gear ratio is automatically switched from high speed to low speed according to the power supply state or the load state during frame feeding, the hoisting motor M2 is rotated counterclockwise and both the sprocket structure 29 and the spool structure 22 are rotationally driven. However, since the speed reduction ratio of the transmission system is set so that the peripheral speed of the spool structure 22 is higher than the peripheral speed of the sprocket structure 29, the sprocket structure 29 is driven by the film wound on the spool structure 22. ,No problem. Therefore, the sprocket arrangement 29 drives the film only when the film is not wound by the spool arrangement 22, but otherwise follows the film independent of the direction of rotation of the winding motor M2.

FIG. 8 shows details of the rewinding motor M3 and the rewinding transmission system K3.

The pinion gear 301 is fixed to the output shaft of the rewinding motor M3. The gear 302 is a large gear 302a and a small gear 302.
It is a two-stage gear having b and is rotatably supported by the large gear 3
02a meshes with the pinion gear 301. The gear 303 is a two-stage gear having a large gear 303a and a small gear 303b and is rotatably supported by the large gear 303a.
Mesh with 2b. The planetary lever 306 is rotatably supported on the same axis as the gear 303, and the compression spring 305 is attached to the small gear 3.
03b and the planetary lever 306, the planetary lever 306 and the large gear 303a are brought into frictional contact with each other. This frictional contact causes the planetary lever 306 to follow and rotate in accordance with the rotation direction of the gear 303. Planetary lever 306
A two-stage gear 304 having a large gear 304a and a small gear 304b is rotatably attached to the tip of the. The gear 307 is attached to one end of a shaft 307b with a screw 307a, and a fork 308 is attached to the other end of the shaft 307b. The fork 308 is a cartridge storage room 310.
It is arranged so as to project inside, and is configured to engage with a winding shaft of a film cartridge not shown. A coil spring 309 is arranged between the washer 307c on the shaft 307b and the fork 308, and the fork 308 can be temporarily retracted so that it can be easily stored in the film cartridge and the cartridge storage chamber 310. There is.

When the rewinding motor M3 rotates clockwise, the gear 303
Rotates clockwise to rotate the planetary lever 306 clockwise to mesh the small gear 304b with the gear 307,
Therefore, the pinion gear 301 → the gear 302 (the large gear 30
2a, small gear 302b) → gear 303 (large gear 303
a, small gear 303b) → gear 304 (large gear 304a,
Rotational force is transmitted in the order of small gear 304b) → gear 307 → fork 308. On the other hand, when the rewinding motor M3 rotates in the counterclockwise direction, the planetary lever 306 rotates in the counterclockwise direction, the meshing between the small gear 304b and the gear 307 is broken, and the rotational force is changed to the fork. I can't reach 308. Therefore, by rotating the rewinding motor M3 slightly counterclockwise, it is possible to prevent the rewinding transmission system K3 and the rewinding motor M3 from being applied to the winding load when the film is wound by the winding motor M2. It is possible to wind the film under load.

FIG. 9 shows a microcomputer COM as the control means 2.
2 shows an exemplary electrical circuit in which is used.

The light receiving element SPC receives the reflected light from the subject and inputs the received light signal to the operational amplifier OP1 having a high input impedance in which the compression diode D1 is connected to the feedback circuit. The operational amplifier OP1 outputs the logarithmically compressed subject brightness information Bv via the resistor R1. The variable resistors VR1 and VR2 connected to the constant voltage source VG1 output the film sensitivity information Sv and the aperture value information Av. The operational amplifier OP2 in which the resistor R2 is connected to the feedback circuit has the shutter time information Tv = (Bv
+ Sv-Av) is calculated and output. The shutter time information Tv is converted into a 4-bit digital value by the A / D converter ADC, is displayed on the in-viewfinder display device DSP via the decoder driver DCD, and is input to the input ports PG0 to PG3 of the microcomputer COM. The 4-bit code 0001 to 1000 is
Corresponding to 1/1000 second to 1/8 second, code 0000 and 1001
The above corresponds to the display element for warning.

When the first stroke switch sw1 connected to the input port PF7 is turned on by the first stroke of the release button, the potential of the output port PE3 becomes high level, so that the transistor TR1 is turned on by the inverter I1 and the resistor R3 and the battery The voltage from Vbt is supplied to each circuit as the power supply voltage Vcc. The arrow ↑ in the figure indicates Vcc, and the power supply voltage Vcc is naturally supplied to the circuit blocks not marked with the arrow ↑, such as operational amplifiers and A / D converters. The microcomputer CO
Another power supply voltage V _DD is supplied to M, the decoder LDEC and the display LCD.

The capacitor Cr is connected to the terminal RST of the microcomputer COM, and the crystal oscillator QZ is connected to the terminals X0 and X1.
Are connected, the power supply voltage V _DD is applied to the terminal V _DD , and the terminal GND is grounded.

The second release button is attached to the input ports PA0 to PA3.
Second stroke switch s that is turned on by stroke
w2, a mirror up switch swMRUP that is turned off when the mirror is up and is turned on when the mirror is down, a front curtain switch swCN that is turned off when the first curtain running is completed, and is turned on when the charging is completed
1. The trailing curtain switch swCN2, which is turned off when the trailing curtain is completed and is turned on when the charging is completed, is connected.

At the input ports PF0 to PF4, the first film switch swFLM1 including the pulse signal board P2 and the contact piece member S2 (FIG. 7), the pulse signal board P3 and the contact piece member S3.
Second film switch swFLM consisting of (Fig. 7)
2. Third including pulse signal board P3 and contact piece member S4
Film switch swFLM3, cam gear 109 (6th
(FIG. 2) The first charge switch swCGE1 that is made up of the pulse signal board and the contact piece member S0 that are fixed in the figure) and that is turned on shortly before the completion of charging, and the same pulse signal board and the contact piece member S1 that are turned on when the charge is completed. The second charge switches swCGE2 are connected to each other. Further, the input port PF5 is connected to a self-drive changeover switch swMODE which is turned off when the self-timer mode S is set and is turned on when the drive mode D is set. The input port PF6 has a self-timer within the self-timer mode S (2 seconds, 1
0 seconds) or a push button type selection switch swSTEP that is pressed when a mode (single shooting high speed, continuous shooting high speed, continuous shooting low speed) in the drive mode D is selected. The self-drive changeover switch swMODE and the selection switch swSTEP correspond to the setting means 1 in FIG. 1, and are provided at a position where the camera body can be easily operated, for example, on the front surface on the right side of the lens.

Transistors TR2 to T are provided at the output ports PE0 to PE2.
The base of R4 is connected and the transistors TR2 to TR4 are connected.
Controls the energization of the first tension magnet MG0 with a permanent magnet that activates the mechanical release operation, the leading curtain magnet MG1 that runs the leading curtain, and the trailing curtain magnet MG2 that runs the trailing curtain.

A drive circuit DR2 for driving the hoisting motor M2 is connected to the output ports PB0, PB1, and output ports PC0, P
A drive circuit DR3 that drives the rewinding motor M3 is connected to C1, and a drive circuit DR1 that drives the charge motor M1 is connected to the output ports PD0 and PD1.

The drive circuits DR1 to DR3 have the same circuit configuration, and the circuit configuration is shown in FIG. A 2-bit signal is input to the input terminals A and B. First, assuming that A = 1 and B = 0, since the signal at the input terminal B is inverted by the inverter I10, the output of the AND gate A12 becomes 1, the output of the OR gate OR10 also becomes 1, and the transistor TR32 turns on. . Further, the output of the inverter I13 becomes 0, so that the transistor TR31 is also turned on. Therefore, the power supply voltage Vcc is applied to the motor M and a current flows, and the motor M rotates in a predetermined direction.

When A = 0 and B = 1, since the signal at the input terminal A is inverted by the inverter I11, the output of the AND gate A10 is 1, the output of the OR gate OR11 is 1, and the inverter I
Since the output of 12 becomes 0, the transistor TR3
0, TR33 is turned on, a current flows through the motor M in the reverse direction, and the motor M rotates in the reverse direction.

When A = 1 and B = 1, the output of the AND gate A11 becomes 1 and the outputs of the OR gates OR10 and OR11 also become 1, so that the transistors TR32 and TR33 are turned on. Therefore, when this mode is set while the motor M is rotating, the diodes D10 and D11 and the transistors TR32 and TR33 turn off the current even when the motor M is rotating in either direction, and the terminals are electrically disconnected. Is short-circuited and the inertial rotation of the motor M is braked.

When A = 0 and B = 0, AND gates A10 to A12
Outputs all 0, and transistors TR30 to TR
All 33 are turned off and the motor M is opened.

Returning to the explanation of FIG. From the output ports PL0 to PL3, two registers RL in the microcomputer COM are connected.
Output 4-bit signal, output port CLKOUT
Outputs a low-frequency clock pulse of about 2 Hz obtained by dividing the fundamental frequency of the crystal oscillator QZ. A decoder LDEC is connected to these output ports, and a decoder LEC is connected.
The DEC is connected to a display LCD composed of liquid crystal or the like. The display LCD is provided on the upper surface of the camera body or in the viewfinder.

FIG. 11 shows details of the decoder LDEC and the display LCD. The decoder LDEC is a binary-hexadecimal decoder DE
C, AND gates A21, A22 and OR gate 21,
Composed of OR22. The binary-hexadecimal decoder DEC converts a binary 4-bit signal into a hexadecimal signal as shown in FIG. 12, and the display LCD turns on the display elements L1 to L5 by the hexadecimal signal input. Or flashes. Blinking of the display element L1 indicates single-shot automatic shift, and blinking of the display element L2 indicates continuous-shot automatic shift. The OR gate OR22 may be connected as shown by the dotted line in FIG. 11 so that the continuous shooting automatic shift can be displayed by blinking the display element L3.

The operation of the microcomputer COM will be described with reference to the flowcharts of FIGS.

The microcomputer COM operates by being supplied with the power supply voltage V _DD . A basic clock is supplied from the crystal oscillator QZ, and at the same time, power-on reset is applied by the capacitor Cr. The built-in program is initialized to address 0, and the program starts from the start. Further, it is assumed that all flags are 0 and the output port is also 0.

[Step 1] Input from input port PF7 (hereinafter PF
7 inputs, the same applies to other ports). When the first stroke switch sw1 is on, the process proceeds to step 2, and when it is off, the mode process shown in FIG. 15 is performed.

[Step 2] Output a high level signal from the output port PE3 to turn on the transistor TR1 (FIG. 9),
The power supply voltage Vcc is supplied to each part.

[Step 3] PA input is input. If the photographer presses the second stroke of the release button when the charging of each part is completed, PA0 = PA1 = PA2 = PA3 =
Since it is 0, the PA input has a value of 00H in hexadecimal. If the PA input is 00H, the release sequence is entered and the process proceeds to step 4. Otherwise, step 1
Return to. That is, when only the first stroke switch sw1 is turned on, steps 1 to 3 are repeated to perform photometry and display thereof.

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

[Step 5] A branch instruction based on the fourth bit data (see FIG. 12) of the register RL inside the microcomputer COM. If the fourth bit of data is 1, the self-timer mode is in effect, so the operation proceeds to step 6, and if it is 0, the operation proceeds to step 9.

[Step 6] A branch instruction by the first bit data of the register RL. If the data of the first bit is 0, the self-timer second is 10 seconds, so proceed to step 7. If it is 1, the self-timer second is 2 seconds.
Go to step 8.

[Step 7] The timer measures 10 seconds.

[Step 8] The timer measures 2 seconds.

[Step 9] The PE0 output is set to 1, and the transistor T
R2 (FIG. 9) is turned on to energize the first tension magnet MG0 from the capacitor C0 charged to the same voltage as the power supply voltage Vcc. This activates the mechanical release operation. After that, a waiting time TIME1 is created by a fixed time timer. Due to the time-up, the PE0 output is set to 0, and the first energizing magnet MG0 is deenergized. This waiting time TIME1 is the first tension magnet M
It may be set to be slightly longer than the minimum time for which G0 is energized. Here, a known mechanical sequence of narrowing-down and mirror-up is entered.

[Step 10] This is a time waiting routine until the mirror is raised. When the mirror is raised, step 11
Go to. This routine is provided to operate the shutter after confirming that the mirror is up.

[Step 11] The flag F0 is determined. F0 = 1 represents the end of the film.

[Step 12] The flag F1 is determined. F1 = 0 represents the film stop certification at the completion of winding.

[Step 13] The contents of the register RG storing the shutter speed in step 4 are converted into a multiple series value.
This is a routine for decompressing the data so that the value stored in the register RG is logarithmically compressed so as to match the actual control value.

[Step 14] The PE1 output is set to 1, and the front curtain magnet MG1 is energized. At this stage, the front curtain starts running.

[Step 15] The real time is counted by the data expanded in step 13, and the calculated shutter time is measured.

[Step 16] The PE2 output is set to 1 and the rear curtain magnet MG2 is energized to drive the rear curtain. This completes the control of the focal plane shutter. Time required for the trailing curtain to complete running with a fixed time timer TIM
E2 is created, and thereafter, PE1 = PE2 = 0 is set, and the energization of the front curtain Gnet MG1 and the rear curtain magnet MG2 is released.

[Step 17] This routine waits for the trailing curtain switch swCN2 to be turned off, that is, for the trailing curtain to be completed. When the traveling is completed, the routine proceeds to step 18.

[Step 18] It is determined whether the content of the register RL is smaller than 2 or larger than 2. From FIG. 12, when the value is smaller than 2, it means the single-shot high-speed mode or the continuous shooting high-speed mode.
In both cases, the reduction ratio is high, and the routine proceeds to step 19. If it is 2 or more, the reduction ratio is low, so the routine proceeds to step 22.

[Step 19] By setting PD0 = 0 and PD1 = 1, the drive circuit DR1 is operated and the charge motor M
1 is rotated in the direction in which the speed reduction ratio of the charge transmission system K1 (FIG. 6) becomes high. As a result, the shutter, the mirror, the automatic diaphragm, and the like are charged at high speed.

[Step 20] The drive circuit DR2 is operated by setting PB0 = 0 and PB1 = 1, and the winding motor M1
Are rotated in the direction in which the speed reduction ratio of the hoisting transmission system K2 (FIG. 7) becomes high. Thereby, film winding is performed at high speed.

[Step 21] The constant P1 for high speed reduction ratio is stored in the register RP related to duty control immediately before completion of winding, and the constant M1 for high speed reduction ratio is stored in register RM related to detection of decrease in winding speed.

[Step 22] By setting PD0 = 1 and PD1 = 0, the charge motor M1 is rotated in the direction in which the reduction ratio of the charge transmission system K1 becomes low.

[Step 23] By setting PB0 = 1 and PB1 = 0, the winding motor M2 is rotated in the direction in which the speed reduction ratio of the winding transmission system K2 becomes low.

[Step 24] The constant P for the low speed reduction ratio is set in the register RP.
2 is stored and the constant M2 for the low speed reduction ratio is stored in the register RM.
Memorize

[Step 25] A constant D is set in the register RD related to the detection of the winding speed decrease during the duty control period, a constant S is set in the register RS related to the film stop approval time, the contents of the register RM are set in the register RMM, and the register RPP is set in the register RPP. The contents of the register RP are stored respectively. For example,
The content of the register RMM is a constant M1 for a high speed reduction ratio.
In the case of the low speed reduction ratio, the constant becomes M2.

The flags F0 = F2 = 0 and F1 = 1 are set. F1 = 1
The setting of means that the winding operation is to be started. The flag F2 represents the on / off state of the first film switch swFLM1.

[Step 26] Timer TMR for timer interrupt
Set constant K to. The value of K is 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 instruction cycle time of the OM.

The timer TMR for timer interrupt is started. It also enables timer interrupts. (EN
T) Since the timer TMR has started, the timer TMR is repeatedly decremented independently of the main program routine thereafter, and interrupts are applied at fixed intervals (depending on the constant K), and the program being executed is assigned a dedicated timer interrupt address. To jump. Here, the timer interrupt process will be described with reference to FIG.

"Timer interrupt process" [Step 101] Stop the decrement operation of the timer TMR and prohibit the interrupt.

[Step 102] P from the third film switch swFLM3, which is turned on each time one frame of film is wound up.
Enter the F2 input. Here, step 20 or 2
If the winding motor M2 has already been driven at 3 and the third film switch FLM3 is turned off at the first timer interrupt, the routine proceeds to step 103.

[Step 103] Branching is performed by inputting PF1 from the second film switch swFLM2 which is turned on before the winding of one film frame is completed. The second film switch swFLM2 controls the winding motor M immediately before the completion of winding.
It is provided for decelerating 2 and improving the accuracy of stop control. In this embodiment, deceleration is performed by duty control, but deceleration may be performed by a low voltage. If it is not just before the winding is completed, step 1
Go to 04.

[Step 104] Branching is performed by inputting PF0 from the first film switch swFLM1 which is repeatedly turned on and off during film winding. Now, assuming that PR0 = 0, the process proceeds to step 105.

[Step 105] The flag F2 is determined. Step two
Since F2 = 0 was set in step 5, the process proceeds to step 106.

[Step 106] The content of the register RMM is decremented by 1, and the content is again stored in the register RMM.

[Step 107] It is determined whether RMM = 0. In the programs up to now, RMM = M1 (M2) −1, so if the constant M1 (M2) is a large value,
Since it does not become 0, the process proceeds to step 108.

[Step 108] The constant K is reset in the timer register, the timer TMR is started, and the timer interrupt process is enabled.

[Step 109] Return to the original program being executed. The timer interrupt process is performed by the program being executed by three film switches swFLM1 and swFL at regular intervals.
The purpose is to determine the states of M2 and swFLM3. Since the program itself executes each instruction at a very high speed, it is assumed that there is practically no problem by inputting film winding information at regular intervals.

Now, if the first film switch swFLM1 is turned off in a certain timer interrupt process, step 104
To step 110.

[Step 110] The flag F2 = 1 is determined. Since F2 = 0 was set in step 25, the process proceeds to step 111.

[Step 111] The flag F2 is set to 1. This is because the first film switch swFLM1 is off, that is, PF.
This means that 0 has changed to 1.

[Step 112] When F2 = 1 is determined in step 105, the content of the flag F2 is set to the first film switch sw.
The flag F2 is set to 0 here in order to turn on the FLM1.

[Step 113] Register RM again in register RM
Set the contents of. Thereafter, the process proceeds to step 108 and the above-mentioned routine is executed. Here, it is assumed that the winding is performed for a while, and it is just before the winding of one frame. At this time, the second
Since the film switch swFLM2 is turned on, PR
1 = 0, and the process proceeds from step 103 to step 114.

[Step 114] It is determined whether the content of the register RPP is smaller than the constant P or larger than P. The register RPP is used to adjust the duty ratio of duty control. As described in steps 21, 24 and 25, initially, the content of the register RPP is a constant P1 (for high speed reduction ratio).
Alternatively, it is P2 (for low speed reduction ratio), and since these values are set larger than the constant P, the first step 11
Go to 5.

[Step 115] Set PB0 = 1 and PB1 = 1. As a result, the energization of the winding motor M2 is cut off and the brake is applied.

[Step 116] 1 is subtracted from the contents of the register RPP, and the value is stored again in the register RPP.

[Step 117] 1 is subtracted from the contents of the register RD, and the value is stored again in the register RD. The register RD is used to detect the end of the film during the duty control period, and is set to the constant D in step 25. The constant D is a relatively large value.

[Step 118] It is determined whether the content of the register RD is 0 or not. Since it is not 0 at the beginning, the routine proceeds to step 108 and the above-mentioned routine is executed.

When the content of the register RPP becomes smaller than the constant P after performing the timer interrupt processing several times, step 11
The program branches from 4 to step 119.

[Step 119] It is determined whether the content of the register RL is smaller than 2 or larger than 2. Referring to FIG. 12, if it is less than 2, it means that the high speed reduction gear ratio is in effect, and therefore, step 1
If it is 2 or more, it means the low speed reduction ratio, so the routine proceeds to step 121.

[Step 120] By setting PB0 = 0 and PB1 = 1, the hoisting motor M2 is rotated in the direction in which the speed reduction ratio of the hoisting transmission system K2 (FIG. 7) is high, and high-speed hoisting is performed.

[Step 121] By setting PB0 = 1 and PB1 = 0, the hoisting motor M2 is rotated in the direction in which the speed reduction ratio of the hoisting transmission system K2 becomes low, and low-speed hoisting is performed.

[Step 122] It is determined whether the content of the register RPP is 0 or not. If it is not 0, the routine proceeds to step 116, and the above-mentioned routine is executed. When it reaches 0, the process proceeds to step 123.

[Step 123] The contents of the register RP (constant P1 or P2) are stored again in the register RPP.

In this way, the duty control is performed by inserting a certain value into the register RPP and setting the value to 1 every timer interrupt (every constant time).
When the content of the register RPP is equal to or greater than the constant P, the current to the hoisting motor M2 is cut off and the brake is applied. When the value is smaller than the constant P, a current is supplied to the hoisting motor M2. The original value is entered in RPP and the method is repeated. Therefore, the duty ratio is determined by the constant K of the timer TMR and the constant P1 or P2 set in the register RPP, and does not depend on the turning on / off of the first film switch swFLM1.

At the time of high speed reduction ratio and low speed reduction ratio, step 2
Since the contents of the register RP are changed by 1 and 24, the duty ratio can be independently selected. further,
If the constant P2 is set to a value smaller than the constant P, for example, 0, the process always proceeds from step 114 to step 119. Therefore, the duty control can be prevented at the low speed reduction ratio.

Now, the deceleration rotation of the hoisting motor M2 continues to be executed, and 1
When film winding is completed, the third film switch swFL
M3 turns on. At this time, in the timer interrupt processing, the process branches from step 102 to step 124.

[Step 124] Set PB0 = 1 and PB1 = 1. As a result, the energization of the winding motor M2 is cut off and the brake is applied.

[Step 125] Similar to step 119, it is determined whether the content of the register RL is smaller than 2 or 2 or more. When the speed reduction ratio is high, the process proceeds to step 126, and when the speed reduction ratio is low, the process proceeds to step 127.

[Step 126] From the contents of the register RS initially set to the constant S in step 25, the constant S for the high speed reduction ratio is calculated.
Subtract 1 and store again in the register RS. The register RS is used to set the certification times T ₁ and T ₂ at the high speed reduction ratio and the low speed reduction ratio from the stop signal of the winding motor M2 to the determination that the film is stopped.

[Step 127] Similar to step 126, the constant S2 for low speed reduction ratio is subtracted from the contents of the register RS, and the result is stored again in the register RS.

[Step 128] It is determined whether the content of the register RS is smaller than 1 or 1 or more. In case of 1 or more, certified time T
_{Since 1} or T ₂ has not yet elapsed, the routine proceeds to step 108 and the above-mentioned routine is executed. If it is smaller than 1, it means that the certification time T ₁ or T ₂ has elapsed, so the routine proceeds to step 129.

[Step 129] It is determined that the film is completely stopped, and the flag F1 = 0 is set.

Regarding steps 124 to 129, since the inertia of the winding transmission system is different between the high speed reduction ratio and the low speed reduction ratio,
The stabilization time from when the stop signal (step 124) of the winding motor M2 is issued to when the film is completely stopped is different, but correspondingly, the certified time from the stop signal of the winding motor M2 to the determination that the film is stopped T ₁ , T ₂
(From step 124 to step 129), the constant S
By setting 1 and S2 separately, they are made different.

After step 129, the process returns to the running program through step 109. Here, since step 108 is not passed, the timer in interrupt is not applied thereafter.

Next, consider a case where the power supply voltage is lowered during the driving of the winding motor M2, or the film winding speed is reduced due to the temperature change although the speed reduction ratio is set.

As the film winding speed decreases, the time interval at which the on / off of the first film switch FLM1 is reversed becomes longer. However, since the timer interrupt takes every fixed time, step 105 or step 11
The number of routines that proceed from 0 to step 106 increases, and finally the content of the register RMM becomes 0. In this way, the abnormal low speed of film winding is detected. At this time, the process proceeds from step 107 to step 130. In addition,
The value of the register RM for initializing the register RMM needs to be independently set because the film winding speed is different between the high speed reduction ratio and the low speed reduction ratio. , M2.

The time-out routine for detecting the abnormal film winding low speed consisting of steps 104 to 107 and 110 to 113 is not used during the duty control period. The reason is that the last step 11 of the duty control routine is
If this time-out routine is continued after 6, 123, the number of program steps of the timer interrupt processing increases, the time until returning to the main routine becomes long, and, for example, the timing of braking the charge motor M1 is delayed. , Because it may cause a problem in the program being executed.

Therefore, during the duty control period, steps 117 and 1 which constitute the abnormal low speed detection process of the duty control period.
According to 18, when the entire duty control period becomes longer than the time depending on the initial setting constant D of the register RD, it is determined that an abnormal low speed of film winding is detected, and the process branches to step 130.

[Step 130] It is determined whether the content of the register RL is smaller than 2 or larger than 2, that is, whether the reduction ratio is high speed or low speed.
When the speed reduction ratio is high, the operation proceeds to step 131, and when the low speed reduction ratio is applied, the operation proceeds to step 132. When the film winding speed decreases at the high speed reduction ratio, the film winding can be performed by switching the reduction ratio from the high speed to the low speed. If the film winding speed decreases at a low speed reduction ratio, as long as the camera's exposure-controllable power supply voltage is maintained, the film winding ability at a low speed reduction ratio is sufficient, and only when the film is finished. Becomes

[Step 131] The PE4 input indicating the state of the second charge switch CGE2 is determined. If the charging is not completed, the process proceeds to step 133. If the charging is completed, the process proceeds to step 134.

[Step 132] When the process has proceeded to this step, it is at the low speed reduction ratio and at the time when the film winding speed is decreased, so that it is the case where the film is finished as described in step 130. Therefore, PB0 = 0, PB
By setting 1 = 0, both terminals of the winding motor M2 are opened. The flag F0 is set to 1 to indicate the end of the film. After that, the process proceeds to step 109, so that no timer interrupt is applied thereafter.

[Step 133] Since charging is not completed, PD0 = 1 and PD1 = 0 are set to rotate the charge motor M1 in a direction to switch the reduction ratio of the charge transmission system K1 (FIG. 6) to a low speed. Charges slowly.

[Step 134] By setting PB0 = 1 and PB1 = 0, the winding motor M2 is rotated in the direction in which the speed reduction ratio of the winding transmission system K2 (FIG. 7) is switched to low speed, and the winding is performed at low speed.

[Step 135] Since the speed reduction ratio is automatically switched from the high speed to the low speed in steps 133 and 134, the third bit of the register RL (FIG. 12) is set to 1 to change to the automatic speed change mode. At the same time, the contents of the register RL are output from the output ports PL0 to PL3 to the decoder LDEC. As a result, the display element L1 or L2 (FIG. 11) of the display LCD blinks to indicate that the automatic shift mode has been selected.

Since the reduction gear ratio has been switched to the low speed, the constant P2 for the low speed reduction ratio is set in the register RP, and the register RPP is initialized to the constant P2. Similarly, a constant M2 for low speed reduction ratio is set in the register RM, and the register RMM is set to the constant M2.
Initialize to. In this way, and steps 21, 2
As shown in FIG. 4, in accordance with the switching of the reduction ratio, the register R
Changing the content of M is a feature of the present invention. Next, in step 108, the above-mentioned routine is executed.

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

Return to the description of the main program routine.

[Step 27] The PF3 input connected to the first charge switch swCGE1 is determined. Just before the completion of charging, the first charge switch swCGE1 is turned on, and the process proceeds to step 28.

[Step 28] It is determined whether the content of the register RL is smaller than 2 or larger than 2, that is, whether the reduction ratio is high speed or low speed.
When the speed reduction ratio is high, the routine proceeds to step 29, and when the low speed reduction ratio, the routine proceeds to step 30.

[Step 29] Since the high speed reduction ratio is in effect, the power supply to the charge motor M1 is cut off and the brake is applied. This is because charging is performed at a high speed, so when the charge motor M1 is braked at the completion of charging, the charge motor M1 continues to rotate due to inertia and prevents overcharging. The brakes are applied so that the charging system stops accurately when the charging is completed.

[Step 30] Second charge switch sw indicating that charging of the shutter, mirror, automatic diaphragm, etc. has been completed
After waiting for the input of the 0 signal from CGE2, the operation proceeds to step 31. Of course, the timer interrupt process is repeatedly performed while waiting for the completion of charging.

[Step 31] PD0 = PD1 = 1 is set. As a result, the power supply to the charge motor M1 is cut off and the brake is applied.

[Step 32] A flag F0 indicating the end of the film is discriminated. Assuming that the film is not finished, go to step 33.

[Step 33] It is determined whether or not the content of the register RL is 1, that is, whether or not the continuous shooting high speed mode is set.
If it is the continuous shooting high-speed mode, jump to NEXT (step 3). The shooting sequence proceeds from step 3 as described above, but what should be noted here is that
This is to energize the first tension magnet MG0 in step 9 without confirming the film stop authorization (flag F1 = 0) at the completion of winding. In other words, for actual shooting, narrowing down and mirror-up, which are not directly related to each other, are executed independently of the film stop at the completion of winding to speed up. Then, in step 10, the mirror-up is confirmed, and in step 12, the film stop certification at the completion of winding is confirmed. Until this time, the timer interrupt is repeated many times, and if it is recognized that the film is stopped when the winding is completed, the process proceeds to the next shutter opening control. In step 12, if the film stop certification at the completion of winding is not yet confirmed, the loop of steps 11 and 12 is repeated, and waits for the film stop certification in the timer interrupt processing. The above is the routine for the continuous shooting high-speed mode.

[Step 34] In a mode other than the continuous shooting high-speed mode, wait until the film stop certification at the completion of winding is recognized (until the flag F1 becomes 0).

[Step 35] It is determined whether or not the content of the register RL is 5, that is, the continuous shooting automatic shift mode. If it is the continuous shooting automatic shift mode, the process jumps to NEXT (step 3). Otherwise, go to step 36.

[Step 36] It is determined whether the content of the register RL is 2, that is, the continuous shooting low speed mode. If it is the continuous shooting low speed mode, jump to NEXT. Otherwise, go to step 37.

[Step 37] It is determined whether or not the 4th bit of the register RL is 1, that is, the self-timer mode. If in self-timer mode, jump to NEXT. Otherwise, go to step 38.

[Step 38] The PF7 input indicating the state of the first stroke switch sw1 is determined, and the first stroke switch s
Wait for w1 to turn off and return to START. This step comes in the single-shot high-speed mode or the single-shot automatic shift mode, so the first stroke switch sw
Wait until 1 is turned off, that is, the release button is released.

In this way, in continuous shooting, when the reduction ratio is low, unlike the case of a high reduction ratio, the next release sequence is started after the film stop certification is made at the completion of winding, It is possible to prohibit an abnormal movement as. That is, at the low speed reduction ratio of continuous shooting, it takes a relatively long time to confirm the film stop. Therefore, if the release sequence is started without confirming the film stop confirmation, the shutter opens after the mirror-up is completed. It takes too much time to give an abnormal feeling to the photographer, but this can be prevented by steps 34 to 36.

Next, consider the case where the film ends halfway up.

In this case, since the flag F0 = 1 is set in the time interrupt process, the process branches from step 32 to step 39.

[Step 39] PC0 = 0 and PC1 = 1 are set, and the rewinding motor M3 is energized via the drive circuit DR3 to start rewinding.

[Step 40] The constant M3 is set in the register RM.

[Steps 41-48] Steps 104-1 in FIG.
07, 110 to 113, which is similar to the program for detecting the movement of the film, and is a program for detecting that the on / off state of the first film switch swFLM1 does not reverse when the rewinding is completed. Is completed, the process proceeds to step 49.

[Step 49] PC0 = 1 is set, and the rotation of the rewinding motor M3 is stopped.

[Step 50] The flag F0 indicating the end of the film is reset to 0.

[Step 51] The third bit of the register RL is set to 0. That is, when the automatic shift is switched, the automatic shift is canceled when the rewinding is completed.
This is because the photographer originally set the single-shooting high-speed mode or the continuous shooting high-speed mode, and the next shooting may be performed at a high-speed reduction ratio depending on the film or the external environment (especially temperature). This is because it may be possible to wind the film, so it is more effective to return to the default mode. After this, return to START.

Next, during continuous shooting at a high speed reduction ratio, charging of the shutter, mirror, and automatic diaphragm ends early, winding is not completed yet, and after the first tension magnet MG0 of the next shooting operation is energized in step 9, Think about when the film ends.

In this case, since the mechanical release operation is activated by the first tension magnet MG0, the film is narrowed down and the mirror is raised, but the film is stopped in the middle of winding and is not wound any more, Film switch s
wFLM3 remains off. Therefore, if the film is rewound as it is, the photographer may misunderstand that the shutter is open, and may perform an erroneous operation. Further, when a strong light beam enters from the lens, there is a risk of causing fogging of the film. Therefore, it is better to rewind the film after lowering the mirror once.

After confirming mirror up in step 10, step 1
While waiting for film stop approval at the completion of winding at 1 and 12,
When the end of the film is detected by the time interrupt process,
Since the flag F0 = 1 is set in step 132, the process branches to step 52 in step 11.

[Step 52] PD0 = 1 and PD1 = 0 are set, and the charge motor M1 is rotated in the direction in which the reduction ratio of the charge transmission system K1 becomes low. The rotation direction of the charge motor M1 may be switched according to the set mode. Next, the program jumps to step 30, confirms the completion of charging, and the program proceeds to steps 31, 32 and 39 to enter the rewinding control.

"Mode processing" In step 1 of FIG. 13, the first stroke switch sw1
If it is determined to be off, the mode processing shown in FIG. 15 is performed.

[Step 150] The output port PE3 is set to 0. This turns off the transistor TR1 (FIG. 9),
The power supply voltage Vcc is turned off. Metering is stopped and electricity is saved. The power supply voltage V _DD is alive.

[Step 151] Self-drive changeover switch sw
Determine the PE5 input from MODE. If it is the drive mode, the process proceeds to step 152, and if it is the self-timer mode, the process proceeds to step 163.

[Step 152] It is determined whether the 4th bit of the register RL is 1. When it is 1, the self-timer mode was in effect until that time, so the routine proceeds to step 153, and when it is 0, it was the drive mode, so that it proceeds to step 155.

[Step 153] When you come to this step,
This means that the photographer has switched the drive changeover switch swMODE from the self-timer mode to the drive mode. Therefore, the content of the register RL is set to 0, and the first drive mode, that is, the single-shot high-speed mode is set.

[Step 154] Output contents of register RL to output port P
It is output from L0 to PL3 and displayed on the display LCD. Then, the process returns to START.

[Step 155] P from the selection switch swSTEP
Determine the F6 input. When PF6 = 1, the self-drive changeover switch swMODE is also a selection switch swST.
Since EP also means that there is no change, the process returns to START. When PR6 = 0, the selection switch swSTEP has been pressed, so the routine proceeds to step 156.

[Step 156] It is determined whether or not the third bit of the register RL is 1, that is, whether the automatic shift has been selected. If the automatic shift is set, the process proceeds to step 157, and if not, the process proceeds to step 158.

[Step 157] The contents of the register RL are ANDed with 1 and the result is stored again in the register RL. This is 0 for the 2nd bit, 3rd bit and 4th bit
This is for canceling the automatic shift, which is equivalent to.
Therefore, the photographer only has to press the selection switch swSTEP once to manually cancel the automatic shift.

[Step 158] If the automatic shift is not set,
The content of the register RL is incremented by 1 and stored again.

[Step 159] It is determined whether the content of the register RL is 3. Since RL = 3 is not assigned to any mode, setting to 3 means that the drive mode 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] The contents of the register RL are set to 0.

Steps 158, 159, and 160 are single-shot high-speed mode →
Continuous shooting high speed mode → continuous shooting low speed mode, select switch sw
This means that switching is made every time STEP is pressed.

[Step 161] Output contents of register RL to output port P
It is output from L0 to PL3 and displayed on the display LCD.

[Step 162] Wait until the selection switch swSTEP is released and then return to START.

[Step 163] Self-drive changeover switch sw
Even when MODE is OFF, it is determined whether the 4th bit of the register RL is 1. When it is 1, the self-timer mode was in effect until that time, so the routine proceeds to step 165, and when it is 0, it was in the drive mode, so step 1
Proceed to 64.

[Step 164] When you come to this step,
This means that the photographer has switched the drive changeover switch swMODE from the drive mode to the self-timer mode. Therefore, the content of the register RL is set to 0 in hexadecimal.
The self-timer is set to AH to set the first self-timer mode, that is, the self-timer 10-second mode.

[Step 165] P from the selection switch swSTEP
Determine the F6 input. When PF6 = 1, the self-drive changeover switch swMODE is also a selection switch swST.
Since EP also means that there is no change, the process returns to START. When PF6 = 0, the selection switch swSTEP has been pressed, so the routine proceeds to step 166.

[Step 166] If the content of the register RL is 0AH,
To step 167, otherwise step 168
To, respectively.

[Step 167] The hexadecimal code 0BH representing the self-timer 2 second mode is stored in the register RL.

[Step 168] The self-timer 10 is set in the register RL.
The hexadecimal code 0AH indicating the second mode is stored.

Steps 166, 167 and 168 are performed by the self-timer 10
This means that the second mode and the self-timer 2 second mode are switched each time the selection switch swSTEP is pressed.

(Effects of the Invention) As described above, according to the present invention, the first winding transmission system is obtained from the first determination speed for determining the abnormal film low speed when being driven by the first winding transmission system. Since the second determination speed for the abnormal low speed determination when driven by the second winding transmission system having a larger reduction ratio is set to a low speed, it is possible to efficiently switch the winding transmission system. It was Further, the determination of the completion of the winding of all the frames of the film is not made only by the fact that the film has become an abnormally low speed in the high-speed winding transmission system, but is switched to the winding transmission system with a large reduction ratio for low speed. Even in the low-speed winding transmission system, when the abnormal low speed of the film is determined, it is judged that all the frames have been wound up, and by this, the winding is stopped. No more wasting.

[Brief description 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,
FIG. 3 is a time chart showing signals of respective parts 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. 6 is a perspective view showing a charge transmission system, FIG. 7 is a perspective view showing a hoisting transmission system, FIG. 8 is a perspective view showing a rewinding transmission system, and FIG.
The figure is a circuit diagram showing the microcomputer and peripheral circuits.
FIG. 10 is a circuit diagram showing a driving circuit, FIG. 11 is a block diagram showing a decoder and a display unit, FIG. 12 is a diagram showing mode codes, and FIGS. 13 to 15 are flowcharts. 1 ... Setting means, 2 ... Control means, 3 ... Drive circuit, 4
...... Switching means, 5 …… High speed transmission system, 6 …… Rolling load,
7 ... film, 8 ... detection means, 9 ... low speed transmission system,
M2: winding motor, K2: winding transmission system, t ₀₁ ,
t ₀₂ …… Detection reference time, t ₁ …… Pulse cycle of winding signal, DR1 to DR3 …… Driving circuit, COM …… Microcomputer.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masayuki Suzuki, 770 Shimonoge, Takatsu-ku, Kawasaki City, Kanagawa Canon Inc., Tamagawa Plant Company Tamagawa Plant (72) Inventor Yoichi Tosaka, 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Canon Inc., Tamagawa Plant (56) Reference JP-A-59-168425 (JP, A) JP-A-60-194433 ( JP, A) JP 59-62840 (JP, A) Actually developed 59-73729 (JP, U)

Claims (1)

[Claims] 1. A motor, which operates using the motor as a drive source, and is switchable between a first hoisting transfer system and a second hoisting transfer system having a speed reduction ratio larger than that of the first hoisting transfer system. In a camera having a different film winding mechanism, the moving speed of the film due to the operation of the film winding mechanism is detected, and when the film is driven by the first winding transmission system, the film is moved from the first determination speed. When the speed is low, the transmission system is switched to the second winding transmission system, and after the switching, the moving speed of the film by the second winding transmission system is set to be lower than the first determination speed. A camera provided with a control means for stopping winding by the motor when the speed is lower than the determination speed.