JPS61183630A - Driving device of camera - Google Patents

Abstract

PURPOSE:To prevent a drop of a power supply voltage caused by superposition of a start rush current of plural motors, by starting a charge motor, when a completion of shutter operation is detected, and starting a winding motor after a prescribed time. CONSTITUTION:When a shutter mechanism 2 completes an operation, a detecting means 3 outputs a signal and inputs it to a control means 1. The control means 1 starts a motor M1 by energizing a driving circuit 4 of a charge motor M1. An output of the motor M1 charges a shutter mechanism, a diaphragm adjusting mechanism, a mirror lifting mechanism, and a lens driving mechanism 5 through a charge transfer system K1. When a completion of the charge is detected 8, the motor M1 is stopped through the control means 1. Subsequently, after a prescribed time from energizing of the driving circuit 4, a driving circuit 6 of a winding motor M2 is energized. An output of the winding motor M2 winds a film 7 through a winding transfer system K2, and when a feed of the film is detected 9, the motor M2 is stopped through the control means 1. In this way, super-position of a voltage drop caused by a rush current of the motors M1, M2 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a camera drive device that uses a plurality of motors to charge various parts of the camera, wind the film, and the like.

(Background of the Invention) Conventionally, a single motor used to charge each part of a camera and advance the film required a multi-stage gear train because the positions of each part of the camera that required charging were different, resulting in poor efficiency. Ta. Therefore, when high-speed charging was required, many batteries were required.

As an improvement, multiple motors are used to charge each part of the camera and advance the film separately using dedicated motors and transmission systems set to optimal reduction ratios.
In addition, methods are being considered that can be performed at high speed with fewer batteries.

In such a case, it is necessary to start the plurality of motors simultaneously after completing the shutter operation in order to complete charging and winding in the shortest possible time. However, when the motor is initially energized, an overcurrent (rush current) corresponding to the internal resistance of the motor flows, so a large current is supplied from the battery, and the power supply voltage drops significantly due to the internal resistance of the battery. Therefore, if a plurality of motors are started at the same time, the power supply voltage may drop abnormally and fall below the minimum guaranteed voltage of the control means such as a microcomputer, which may impede the operation of the control means.

(Object of the Invention) An object of the present invention is to provide a camera drive device that can solve the above-mentioned problems and prevent a drop in power supply voltage due to rush current of a plurality of motors.

(Features of the Invention) In order to achieve the above object, the present invention staggers the start of energization of a plurality of motors after the shutter operation of the camera is completed.
The present invention is characterized in that a control means for controlling the drive of each motor is provided so that the rush currents of the plurality of motors do not overlap.

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

For example, a control means 1 consisting of a microcomputer operates the shutter mechanism 2 in a series of release sequences, and when the shutter operation is completed, a shutter operation detection means 3 detects this completion and inputs this detection signal to the control means 1. In response to this, the control means 1 first operates the drive circuit 4 to start energizing the charge motor M1. As a result, the charge motor M1 rotates, and the charge transmission system passes through the charge load 5, which requires charging of the shutter mechanism, mirror lifting mechanism, lens drive mechanism, etc.
is charged. The control means 1 operates the drive circuit 6 by shifting the charge motor M1 by the time when the rush current flowing in the initial stage of energization disappears and the current value becomes stable;
The rotation of the hoisting motor M2 starts energizing the hoisting motor M2, and the hoisting load 7 (
(including the film), and the film is wound.

The charging completion detection means 8 detects that the charging of all parts of the camera is completed, and the control means 1 controls the stopping of the charging motor Ml in response to this detection signal.

The film feed detection means 9 detects the winding state such as during winding, just before completion of winding, or completion of winding from the movement of the film, and in response to this detection signal, the control means 1 controls the winding motor M.
2. Controls deceleration, stopping, etc. Note that the film may be rewound by a separate rewind motor, or by the winding motor M2, or the charging of each part of the camera may be shared between two or more motors. In this case, the start of energization of each motor is sequentially shifted by the time that the rush current flows.

According to this embodiment, the start of energization of the charge motor M1 and the hoisting motor M2 is delayed by the amount of time during which the rush current of the charge motor M1 flows, so there is no need to place an excessive burden on the battery, and an abnormal drop in the power supply voltage occurs. can be prevented.

Examples of a camera driving device embodying the embodiment shown in FIG. 1 are shown in FIGS. 2 to 8.

FIG. 2 is a diagram showing the arrangement of each motor when the camera is viewed from the front. Ml is a charge motor that controls charging of the shutter, the aperture adjustment mechanism, the lens drive mechanism, and the mirror lifting mechanism, and is arranged at the front left end of the camera 20. As for the charge motor M1, load fluctuations due to environmental conditions are small, but since the absolute load is large, a relatively large motor is required, and is therefore housed in a grip 21 formed protruding from the front left end of the camera 20. Kl is a charge transmission system for the charge motor Ml; a winding motor M2 is disposed within the spool arrangement 22 for winding the film; It is located on the right front side of the cartridge, that is, on the cartridge side, and adjacent to the unwinding transmission system, there are three
is placed. 23 is the power supply battery, which consists of four AA batteries.

FIG. 3 is a diagram showing the arrangement of each motor when the camera 20 is viewed from above. 24 is a film cartridge, 25 is a play 1 type reshutter, 26 is a mirror elevating mechanism, 27 is a lens aperture adjustment mechanism, 28 is a lens drive mechanism, and 29 is a sprocket configuration for determining the feed amount of the film 6.

FIG. 4 shows details of the charge motor Ml and the charge transmission system 1.

The pinion gear 101 is fixed to the output shaft of the charge motor M1 and meshes with the gear 102. Gears 102 and 103 constitute a two-stage gear, and are each rotatably supported by a shaft 114 set on a base plate 117. The gears 102 and 103 each have protrusions 102a that alternately protrude in the thrust direction.
, 103a are formed, and by fitting these protrusions 102a and 103a, the gears 102 and 103 mesh and interlock in the rotational direction, but can freely move relative to each other in the thrust direction. On the other hand, gear 103.

It has a surface that comes into contact with the planetary lever 106 that rotates about a shaft 114, and comes into frictional contact with the planetary lever 106 by a compression spring 104 disposed between the gears 102 and 103. As a result, the planetary lever 106 rotates following the rotational direction of the gear 103. The gear lO5 is rotatably supported by a shaft 115 mounted on the planetary lever 106, and the gear 103
The gear 107, which is always in mesh with the main plate 117, has a large gear 107a and a small gear (not shown) fixedly formed on the upper part of the large gear 107a.
A two-stage gear is rotatably supported on a shaft 111 installed in the
rotates counterclockwise (in the direction of the arrow), the planetary lever 106 rotates clockwise, and the large gear 107a shifts to the gear 10.
The gear 108, which meshes with the gear 5, is rotatably supported by a shaft 112 mounted on the base plate 117, and includes a large gear 108a and a small gear (not shown) fixedly formed on the upper 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, and the cam gear 109 engages with the shaft 1 mounted on the base plate 117.
24, and the gear 109a and the cam 11
3 is formed. The gear 109a is always engaged 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 rotational direction of the charge motor Ml. That is, when the charge motor M1 rotates counterclockwise, each part rotates in the direction of the solid line arrow, and as the planetary lever 106 rotates clockwise, the pinion gear 101 → gears 102, 103 → gear 105 and the rotation gear 1 are rotated.
07 (large gear 107a, small gear) → gear 108 (large gear 108a, small gear) → cam gear 109 The gear train is switched to a low speed gear train with a large reduction ratio. On the other hand, when the charge motor M1 rotates clockwise, each part rotates in the direction of the dotted arrow, and as the planetary lever 106 rotates counterclockwise, the pinion gear 101 → gears 102, 103 → gear 110 → gear 108 (large The gear 108a, small gear) is switched to a high-speed gear train with a small reduction ratio consisting of a cam gear 109. Note that the cam gear 109 is connected to the charge motor M1.
The two gear trains are set so that they always rotate clockwise, no matter which direction the motor rotates.

The first shutter charge lever 118 is rotatably supported on a shaft 125 mounted on the base plate 117, a rotatable roller 119 is attached to one end of one lever by a shaft 118a, and one end of the other lever is A cam 118b is formed. The roller 119 slides on a cam surface on the outer periphery of the cam 113 of the cam gear 109, and provides the first shutter charge lever 118 with rocking motion that follows the cam displacement of the cam surface. This swing also causes the cam 118b to swing. The @2 shutter charge lever 120 is rotatably supported by a shaft 127 mounted on the base plate 117.

It has 60121 with the shaft 120a as the rotation axis.

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

The lever 122 is a lever that charges a known aperture adjustment mechanism, mirror elevating mechanism, lens drive mechanism, etc., and is rotatably supported by a shaft 126 set on the base plate 117, and one end of the lever is rotatably supported. A roller 123 is attached by a shaft 122a, and this roller 123 engages with a cam 118c of the first shutter charger/<-118. Therefore.

The lever 122 also swings following the swing of the first shutter charge lever 118 to charge the aperture adjustment mechanism, mirror lifting mechanism, and the like.

SO is a contact member that forms a switch with a signal board (not shown) fixed to the cam gear 109 and detects that the cam 113 is rotated by the charge motor M1.

FIG. 5 shows details of the hoisting motor M2 and the hoisting transmission system 2.

Pinion gear 201 is secured to the output shaft of hoist motor M2 located within spool arrangement 22. The gear 202 is a two-stage gear having a large gear 202a and a small gear 2.degree. 2b, and is rotatably supported.The large gear 202a meshes with the pinion gear 201.The gear 203 has a large gear 203a and a small gear 2.degree. 3b. Gear 2 is a stepped gear, rotatably supported, and the large gear 203a meshes with the small gear 202b.
04 is a two-stage gear having a large gear 204a and a small gear 204b, which are rotatably supported, and the large gear 204a meshes with a small gear 203b.A planetary lever 219a is further mounted on the center shaft of the second-stage gear 204 with a bearing 219b. The compression spring 220 is arranged between the small gear 204b and the bearing 219b, and the bearing 219b and the large gear 2
04a into frictional contact. This frictional contact causes gear 2 to
The planetary lever 219a follows and rotates according to the direction of rotation of 04. On the planetary lever 219a, there is a large gear 2.
A two-stage gear 205 having a large gear 208a and a small gear 205b, and a two-stage gear 208 having a large gear 208a and a small gear (not shown) fixedly formed below the large gear 208a are rotatably attached. A two-stage gear 20 is located near the gear 205.
6 is arranged, and the large gear 206a and the small gear 206b are independently rotatably supported. However, a coil spring 215 is disposed between the large gear 206a and the small gear 206b to provide a one-way clutch function, and one end of the coil spring 215 is fixed to the post 206c of the large gear 206a, and the coil spring 215 is fixed to the post 206c of the large gear 206a. As the small gear 206b rotates, the coil spring 215 tightens the shaft of the small gear 206b, causing it to rotate together. The gear 207 is always engaged with the small gear 206b, and the shaft 216 rotates the driving sprocket 29a. A pulse board Pi whose entire circumference is divided into 12 equal parts is fixed to the gear 207, and when the drive sprocket 29a rotates once, a 12-side pulse is obtained via the armature member S1. Therefore, the drive sprocket 29a has six teeth, and in a 35 mm full-size camera, one frame of film is fed by 4/3 rotation, so the number of pulses obtained via the armature member Sl is 16. Needless to say, it is possible to arbitrarily select the equal number of pulse substrates Pi, and when controlling the deceleration of the hoisting motor M2 by intermittent energization drive (duty drive), it is possible to select a larger number of equal fractions. preferable.

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, rotatably supported, 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. Further, a cover 212 is disposed near the outside of the spool 211 and is rotatable by a shaft 213 provided on the fixed part of the camera.
The cover 212, the shaft 213, and the spring 214 are pressed toward the spool 211 side by the spool 211, and have the function of promoting automatic winding of the film onto the spool 211.Although only one set of the cover 212, shaft 213, and spring 214 is shown in the figure, there is another one on the opposite side. One set will be placed.

The sprocket 29b is driven only by the film, and its rotation is transmitted to the gear 217 by a shaft connected to it, and the detection gear 218 that meshes with the gear 217.
transmitted to. The ratio of the number of teeth between gear 217 and detection gear 218 is 3:4. A pulse board P2 that generates one pulse per rotation is fixed to the gear 218.
Pulses are obtained via the contact pieces S2 and S3. The armature member S2 is provided a predetermined phase ahead of the armature arm S3, and the drive of the hoisting motor M2 is switched to duty drive by the pulse output from the armature member S2 to lower the rotation speed. When the winding motor M2 is braked by a pulse from the contact member S3, the winding motor M2 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 is set to 3:2, or the ratio of the number of teeth remains at 3:4,
If the pulse substrate P2 is divided into two equal parts and one pulse is generated every 180 degree rotation, the amount of film feed per time can be made half the size. Further, 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 making it possible to switch the number of pulses counted between 1 and 2, full size and half size can be easily accommodated.

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

Gear 203 (large gear 203a, small gear 203b) → Gear 204 (large gear 204a, small gear 204b) → Gear 205 (large gear 205a, small gear 205b) → Gear 2
06 (large gear 206a, small gear 206b) → gear 207
→It is transmitted to the drive sprocket 29a at a large reduction ratio, and the gears 204 (large gear 204a, small gear 204
b) → gear 208 (large gear 208a, small gear) → gear 209 (large gear 209a, small gear 209b) → spool gear 210 → transmitted to spool configuration 22 at a large reduction ratio.

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

As described above, the transmission system in the 22-direction spool configuration of the hoisting motor M2 can obtain two types of reduction ratios depending on the rotational direction of the hoisting motor M2. When rotating clockwise, the reduction ratio becomes smaller. 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 is switched to the one with a larger reduction ratio of 2, and the drive sprocket 29a is rotated at a low speed.
and rotational drive of the spool arrangement 22. Frame feeding is performed after each subsequent photograph, and only the spool structure 22 is rotated at high speed. Of course, even if the winding motor M2 is rotated counterclockwise during frame feeding, the drive There is no problem since the sprocket 29a is driven by the film being wound onto the spool arrangement 22, so the drive sprocket 29a only drives the film when the film is not being wound by the spool arrangement 22, but otherwise. It follows the film regardless of the rotational direction of the winding motor M2.

FIG. 6 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
Gear 303 is a two-stage gear having a large gear 303a and a small gear 303b, and is rotatably supported, and the large gear 303a meshes with the small gear 302.
The planetary lever 306 that meshes with the gear 303 is rotatably supported on the same axis as the gear 303, and the compression spring 305 is connected to the small gear 30.
3b and the planetary lever 306, and brings the planetary lever 308 and the large gear 303a into frictional contact. Due to this frictional contact, the planetary lever 306 rotates in accordance with the direction of rotation of the gear 303. A two-stage gear 304 having a large gear 304a and a small gear 304b is rotatably attached to the tip of the planetary lever 306. gear 3
07 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 C shaft 307b. 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). A coil spring 309 is disposed between the receiving washer 307C on the shaft 307b and the fork 308, and the fork 308 can be temporarily retracted to make it easier to store the film cartridge in the cartridge storage chamber 310. There is.

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,
The rotational force is transmitted from the small gear 304b) to the gear 307 and to the fork 308. On the other hand, when the rewind motor M3 rotates counterclockwise, the planetary lever 30B rotates counterclockwise, the engagement between the small gear 304b and the gear 307 is broken, and one rotational force is transferred to the fork. Therefore, by rotating the first rewind motor M3 slightly counterclockwise, the winding load is not applied to the rewind transmission system 3 and the rewind motor M3 when the first winding motor M2 winds the film. This makes it possible to wind the film with low load.

In addition, in each of the transmission systems shown in Figures 4 to 6, transmission systems 1 to 3 have planetary gears that change the reduction ratio according to the change in the motor's rotation direction, but a one-way clutch changes the motor's rotation. The reduction ratio may be switched in accordance with the direction switching.

Figure 7 shows a microcomputer COM as control means 1.
A specific example of an electric circuit in which this is used is shown below.

The light receiving element SPC receives reflected light from the subject, and inputs the received light signal to an operational amplifier OP1 having a high input impedance and having a compression diode D1 connected to a feedback circuit. The operational amplifier OPI outputs logarithmically compressed object brightness information By via a resistor R1. Variable resistors VR1 and VH2 connected to the constant voltage source VGI 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 outputs the shutter speed information 〒tr=
/Q w 4 (w-Δxy)911 Leave. The shutter speed information Tv is converted into a 4-bit digital value by the A/D converter ADC, and displayed on the display device DSP in the viewfinder via the decoder driver DCD, as well as the input port P of the microcomputer COM.
Input to GO~PG3. Note that the 0 of the 4-bit code
001 to 1000 correspond to 1/10.00 seconds to 1/8 seconds, and codes oooo and 1001 or more correspond to warning display elements.

When the first stroke switch swl is turned on by the first stroke of the release button, the transistor TRI is turned on, and the voltage from the battery vbt is supplied to each circuit as the power supply voltage Vcc. Yes, circuit blocks not marked with an arrow ↑, such as operational amplifiers, A/D converters, etc., naturally also have a power supply voltage Vc.
c is supplied. Even after the first stroke switch SW1 is turned off, the supply of the power supply voltage Vcc is maintained while a low level signal is applied to the base of the transistor TRI from the output port PE3 of the microcomputer COM via the inverter 1 and the resistor R3. be done.

A capacitor Cr is connected to the terminal R3T of the microcomputer COM, and a crystal oscillator QZ is connected to the terminals XO and Xi.
is connected, power supply voltage Vcc is applied to terminal VOO,
Terminal GND is grounded.

Input port PAO-PA3 has the 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 trailing curtain switch swcNl is connected, which is turned off when the trailing curtain travel is completed and turned on when charging is completed.

A first film switch s consisting of a pulse substrate P1 and a contact piece member 31 (FIG. 5) is installed in PFO to PF3 (input capo).
w F L M 1, pulse board P2 and contact piece member S
A second film switch swFLM consisting of 2 (Fig. 5)
2. Third film switch swFLM3 consisting of pulse board P2 and contact member S3, cam gear 109 (Fig. 4)
The charge switch swCGE consists of a signal board and a contact piece SO fixedly attached to the charge switch swCGE, which is turned on when charging is completed.
are connected to each other.

Output ports PE0-PE2 include transistors TR2-T.
The base of R4 is connected, and the transistors TR2 to TR4
controls the energization of the first clamping magnet MGO of permanent magnet material that starts 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, respectively.

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 CI, and a drive circuit DRI that drives a charge motor M1 is connected to output ports PDO and PDI. The drive circuits DRI 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 110, so the output of AND gate A12 becomes 1, the output of OR gate 0R10 also becomes 1, and transistor TR
32 turns on.

Further, since the output of the inverter 113 becomes O, the transistor TR31 is also turned on. Therefore, motor M
Power supply voltage Vcc is applied to the motor M, and a current flows through 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 AIO is 1, the output of OR gate 0R11 is also 1, and inverter 1
12 becomes O, the transistor TR3
0, TR33 is turned on, current flows in the opposite direction to the motor M, and the motor M rotates in the reverse direction.

A=1. When B=1, the output of AND gate All is 1
, t7 gates 0R1O, 0R11 (7) outputs also become 1, turning on transistors TR32 and TR33. Therefore, if this mode is set while the motor M is rotating, the diode 010. Dll and transistors TR32 and TR33 cut off the current even if the motor M is rotating in either direction, short-circuit the terminals, and apply a brake to the inertial rotation of the motor M.

If A=O, B=O, AND gate 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.

The operation of the microcomputer COM is shown in Figures 9A and 9B.
This will be explained with reference to the figure and the flowchart of FIG. 1O.

[Step 1] The microcomputer COM operates by being supplied with the power supply voltage Vcc in response to turning on the first stroke switch swl. Crystal oscillator QZ
receives the basic clock from the capacitor Cr.
A power-on reset is required. The built-in program counter is initially set to address O, and the program starts from the start. Further, it is assumed that all flags are 0 and the output port is also 0.

[Step 2] Receive inputs from PAO to PA3 (hereinafter referred to as FA large input; the same applies to other boats). If each part is fully charged and the photographer presses the second stroke of the release button, PAO=
Since PA1÷PA2=FA3=0, FA large input 1
The value is OOH in hexadecimal.

[Step 3] If the FA large input is OOH, proceed to step 5; otherwise, proceed to step 4.

[Step 4] If the FA large input is not OOH now,
Set PE3 output to 0. At power-on reset, all output ports are O, so this command is meaningless, but since the program may jump to step 1 from the middle, it has meaning at this time. Release) [Step 5] When the FA large input OOH occurs, that is, when the photographer presses the second stroke of the release button, the camera enters the shooting mode. The PE3 output becomes 1, keeps the transistor TRI on, and latches the power supply voltage Vcc.

[Step 6] By A/D converter ADC, ゛4
Input the apex value Tv of shirt time seconds converted to a digital value of bits. Since it is 4 bits, it can take values from 0 to 15 in lO base.

[Step 7] Since it is in the PG large input accumulator A that was input in step 6, this value is stored in the internal register RG.
Transfer to I.

[Step 8] Set the PEO output to 1, turn on the transistor TR2, and connect the first clamping magnet from the capacitor CO charged to almost the same voltage as the power supply voltage VCC).
Turn on power to MGO. This activates the mechanical release operation.

[Step 9] Create a waiting time using a timer for a certain period of time. In this program, for example, all that is required is to put a certain value into accumulator A, subtract l by l, and use the time until A=O, but the flow becomes complicated, so it has been omitted. In addition, T
The same applies to IME2 to TIME4.

C step 10] Set the PEO output to O and de-energize the first tensioning magnet MGO. TIME1 may be set to be slightly longer than the minimum time during which the first tensioning magnet (MGO) is energized.After this, the well-known mechanical sequence of narrowing down and mirror up begins.

[Step 11] Receive PAL input indicating mirror status. Since the MGO (first tension magnet) has been released, the mirror should be raised after a certain period of time.

[Step 12] This is a waiting routine until the mirror is raised. When the mirror is raised, the process advances to step 13. This routine is provided to operate the shutter after confirming that the mirror is up.

[Step 13] Determine flag FO. FO=1 represents the end of the film.

(Step 14) Determine flag Fl. Fl=0
indicates that winding is complete.

[Step 15] Determine whether the value of internal register RGI is O. As mentioned above, the shirt time is l/1o0
When the time is shorter than 0 seconds, PG large input 0000, that is, RG
1 = O.

[Step 16] When RG1=O, RG l is forcibly fixed to 1, that is, 171000 seconds.

[Step 17] It is determined that RGI>8, that is, the time is longer than 1/8 second.

[Step 18] If RGI>8, forcibly fix RG1 to 8, that is, 1/8 seconds.

[Step 19] Put 1 into accumulator A.

The routine of steps 19 to 22 is for expanding and converting the value of the internal register RGI indicating the time in seconds into a multiple series.

[Step 20] Subtract 1 from the value of internal register RGI and put it into internal register RGI again.

[Step 21] Determine RG1=0. If the value is O, the process proceeds to Step 23; if it is not 0, the process proceeds to Step 22.

[Step 22: Shift the contents of accumulator A to the left. In other words, double the value. Accumulator A is 8
For example, if RG=8, then the contents of accumulator A are left shifted seven times. Therefore, initially the contents of the accumulator are 0000000
1 becomes 0, which becomes 10000000. [Step 23] Transfer the contents of accumulator A to internal register RGI. This means that the shirt time is extended in multiples.

[Step 24] Set the PEI output to 1 and energize the leading magnet MG1. At this stage, the leading curtain starts running.

[Step 25] A waiting time is created using a timer for a certain period of time.

[Step 26] Decrement the contents of internal register RGI by 1.

[Step 27] Steps 25→27 are repeated until RG 1 =O, thereby measuring the actual time in seconds.

[Step 28] Set the PE2 output to 1, energize the trailing curtain magnet MG2, and run the trailing curtain. with this,
Focal plane shutter control ends.

[Step 29] A timer is used to create the time necessary for the trailing curtain to complete its travel.

[Step 301: Setting PE1=PE2=0, the leading curtain magnet MGI and the trailing curtain magnet MG2 are de-energized.

[Step 31] Receive input from rear curtain switch and 5wCN2.

[Step 32] This is a routine that waits for the trailing curtain switch 5wCN2 to be turned off, that is, the trailing curtain has completed running.
Proceed to step 33.

[Step 33] PDO=0. By setting PO2-4, the drive circuit DRI is operated and the charge motor Ml is rotated. This allows the shutter, mirror,
Charges such as automatic aperture are performed.

[Step 34] The start timings of energization of the charge motor M1 and the hoisting motor M2 are shifted to create a waiting time for waiting for the current flowing through the charge motor M1 to stabilize. This can prevent rough currents from overlapping during initial energization.

[Step 35] By setting PBO=O and PBl=1, the drive circuit DR2 is operated and the hoisting motor M
Rotate 2. This causes the film to be wound up.

[Step 36] Timer T for timer interconnected
Set constant K to MR. The value of is determined by the film winding speed, the equal fraction of the pulse board PL of the first film switch swFLM1 (Fig. 5), and the microcomputer CO.
is a constant determined by the instruction cycle time of M.

[Step 37] Timer TM for timer interconnected
Start R. Allows timers to be interacted with. (ENT) Input constant M to internal register RG2. Set flags FO=F2=F3=0 and Fl=1. Flag F2 is the first film switch s w F L
The flag F3 represents the on/off state of the second film switch swFLM2. Since the timer TMR has started, the timer TMR repeats decrementing independently of the main program routine, (depending on K), the executing program jumps to the dedicated timer interwoven address. Here, timer interrelated processing will be explained with reference to FIG.

"Timer interrelated processing j [Step 101] Decrement operation and interrelated operation of timer TMR are prohibited.

[Stella 7'102] 1st film switch SWF
Receives PFO input from LMI.

[Step 103] If PFO=O, step 104
If PFO=1, the process proceeds to step 114, respectively.

[Step 104] Since PBO=O is the same as that set in step 35, the winding motor M2 continues to be energized.

[Step 105] Determine flag F2. Step 371 Since we set F 2 = O, step 10
Proceed to step 6.

[Step 106] Decrement the contents of internal register RG2 by 1.

[Step 107] Determine RG2=0. In the program up to now, RG2=M-1, so if M is a relatively large value, it will not be 0, so the process proceeds to step 108.

[Step 108] Second film switch SWFL
Receives PFI input from M2.

[Step 109] Determine whether PFl=O.

If the film has not been advanced until just before winding one frame,
Since PFl=1, the process advances to step 110.

[Stella 7'llO] 3rd film switch SWF
Receives PF2 man power from LM3.

[Step 111] Determine PF2=0.

If winding of one frame of film is not completed, PF2=
Since it is 1, the process advances to step 112.

[Step 112] Reset the constant K in the timer register, start timer TMR, and enable interoperability.

[Step 113] Return to the original program being executed.

Timer-interrupted processing is performed by setting the three film switches SwFLMl, 5W at regular intervals from the running program.
The purpose is to determine the status of FLM2 and SWFLM3. Since each instruction in 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.

Assuming that the first film switch swFLM1 is turned off in a certain timer-interrupted process, the process proceeds from step 103 to step 114.

[Step 114] Determine whether flag F3=1. Since F3 was set to 0 in step 37, step 115
Proceed to.

[Step 115] Determine whether flag F2=1. Since F2=0 was set in step 37, the process advances to step 116.

[Step 116] Set flag F2 to 1. This means that the first film switch swFLML is off or P
This means that FO has changed to 1.

[Step 117] Add constant M to internal register RG2 again.
Set. Thereafter, the process proceeds to step 108, and the above-mentioned routine is executed. At this point, winding is performed for a while,
■Assume that it is just before the torso is to be hoisted. At this time, the second film switch s wF LM2 is turned on, so PF1
=O, and the process advances from step 109 to step 118.

[Step 118] Set flag F3 to 1. Therefore, in the subsequent timer-interrupted processing, the process advances from step 114 to step 119.

[Step 119] Set PBO=1.

Since PB1 has already been set to 1 in step 37, the first hoisting motor M2 is de-energized and the brake is applied. However, the hoisting motor M2 does not stop immediately due to inertia and continues to rotate. The first film switch s
When w F L M 1 is switched from off to on, the process proceeds from step 103 to step 104, and PBO is activated again.
=O, the winding motor M2 is energized again. At this time, since the 7 lag F2 has already been set to 1 in step 116, the process advances to step 120.

[Step 120] Set flag F2=0, and then in step 117 set constant M in internal register RG2. Therefore, the second film switch swFLM2
is on, that is, just before the winding is completed, the winding motor M2 is repeatedly controlled (duty control) of energization → brake → energization → brake according to the on/off changes of the first film switch swFLM1, and the deceleration is reduced. executed.

When winding of one frame of the film is completed, the third film switch swFLM3 is turned on, and the process proceeds from step 111 to step 121.

[Step 121] Similarly to step 119, apply a brake to the hoisting motor M2.

[Step 122] Set flag F1=0. This is a flag that indicates the completion of winding.
Press 3 to return to the original program. Since step 112 has not yet been passed, interoperability will not occur again after this point.

Next, for example, if a 24-frame film is used and 24 frames have been taken, the winding motor M2 attempts to wind the film, but since the film cannot move any further, the first film switch swFL
The on/off status of M1 no longer changes. Therefore, the flag F2 is fixed to 0 or l and does not change, and the contents of the internal register RG2 are subtracted by 1 in step 106, and in some timer-interrupted processing, RG2=
It becomes 0. Therefore, from step 107 to step 12
Proceed to step 3.

[Step 123] PBO=PBl=O is set, and both terminals of the hoisting motor M2 are opened.

C step 124] Set flag FO=O. This marks the end of the film.

The above time-interrupted processing is always executed from step 37 of the main routine to step 15 of the next photographing, and accurately executes film winding control.

Returning to the description of the main program routine.

[Step 38] Charge switch sw indicates that charging of the shutter, mirror, automatic aperture, etc. is completed.
Inputs the signal from CGE.

[Step 39] Together with step 38, a routine is configured to wait until charging is completed. Of course.

During this time, timer-interrupted processing is performed many times.

[Step 40] Set the PDO output to 1. This applies a brake to the charge motor Ml.

C step 413: A flag FO indicating the end of the film is determined. Assuming that the film has not yet finished, the process proceeds to step 42.

[Step 42] Same as step 2.

[Step 43] When the photographer performs continuous shooting, the second stroke sw2 continues to be on, so the PA large input hexadecimal becomes OOH and jumps to NEXT (step 6). From step 6, the shooting sequence proceeds as described above, but it should be noted here that the first tension magnet MGO is energized in step 2 and step 8 without confirming the completion of film winding. It's about putting it away. In other words, aperture settings that are not directly related to actual shooting,
The mirror-up is executed regardless of the completion of winding to speed up the process. Thereafter, in step 12, the mirror up is confirmed, and in step 14, the winding is confirmed. Up to this point, the timer is interrupted many times, and if the first winding is completed, the next shutter control is started.

Next, we will discuss shooting only one frame. After photographing one frame, the photographer should not have pressed the second stroke of the release button, so the process advances from step 43 to step 44.

[Step 44] Steps 41 to 44 are repeated until completion of winding is confirmed in the timer-interrupted process, that is, until Fl-0 is reached. When winding is completed at 0, 5 TAR
Return to T (step 1), and in step 4 set the power supply voltage Vcc
Release the latch. When the first stroke switch swl is also off, the power supply voltage VCC disappears. (End of shooting sequence) 1 rewind processing 1 If the film ends in the middle of being wound, the flag FO will be set to 1 in the time interwoven processing.

The process branches from step 41 to step 45.

[Steps 45 to 47] Similarly to Steps 28 to 30, the trailing curtain is caused to run by energizing the trailing curtain magnet MG2 for a certain period of time. This is to prevent fogging of the film due to the photographer inadvertently removing the lens and irradiating the shutter curtain with strong light during rewind. The presence of both a leading and trailing curtain in the aperture completely prevents light from reaching the film surface.

[Step 48] Input the signal from the trailing curtain switch swCNZ.

[Step 49] Wait for the rear curtain run to be completed, and when it is completed,
Proceed to step 50.

[Step 501 PCO=0. Set to PO2-4 and rotate the rewind motor M3.

[Step 51] Set internal register RG2 to Ml.

[Steps 52 to 60] Steps 102, 103, 105, 106, and 107 in timer interwoven processing
, 115, 116, 117, and 120, and this program detects that the drive sprocket 29a stops rotating when rewinding is completed. Once completed, the process advances to step 61.

[Step 61] Set PCO=1 and turn rewind motor M
Stop the rotation of step 3.

[Step 62] A flag FO indicating the end of the film is reset to 0.

[Step 63] PDO=0. Set PDl=1,
Rotate charge motor Ml. This is to return the shutter mechanism to the fully charged state since the trailing curtain is run in step 45 before rewinding.

[Step 64] Input the signal from the charge switch swCGE.

[Step 65] Wait for charging to complete, then proceed to Step 6
Proceed to step 6.

[Step 66] Stop the rotation of charge motor Ml. All rewinding processing is now complete.

5 Return to TART (Step 1).

Next, during continuous shooting, the charging of the shutter, mirror, and automatic aperture finished early, and the winding was not completed yet, so step 8
~10 (first tension magnet for the next shooting operation) MGO
Consider the case where the film ends after the is energized.

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

After checking the mirror up in step 12, step 1
When the end of the film is detected in the time interwoven process while waiting for the completion of winding in step 3.14, the flag FO=1 is set in step 124, so that step 13 branches to step 67.

[Step 67] Set PDO=O, PD1=1, and rotate charge motor M1.

[Steps 68-69] Detect completion of charging.

[Step 701: Set PDO=1 and apply brake to charge motor Ml. Since the mirror is charged in this state, the 0th order R goes down and returns to the initial state.
Jump to WND (step 45) and perform rewind processing.

(Effects of the Invention) As explained above, according to the present invention, after the shutter operation of the camera is completed, the start of energization of the plurality of motors is staggered,
Since a control means for controlling the drive of each motor is provided to prevent the rush currents of the plurality of motors from overlapping, it is possible to prevent a drop in the power supply voltage due to the rush currents of the plurality of motors.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. Fig. 2 is a front view showing a camera embodying the embodiment shown in Fig. 1, Fig. 3 is a plan view thereof, Fig. 4 is a perspective view showing a charge transmission system, and Fig. 5 is a winding transmission system. 6 is a perspective view showing the rewinding transmission system, FIG. 7 is a circuit diagram showing the microcomputer and peripheral circuits, FIG. 8 is a circuit diagram showing the drive circuit, and FIGS. 9A and 9B. and 10th
The figure is a flowchart. l... Control means, 2... Shutter mechanism, 3... Shutter operation detection means, 4.6...
...Drive circuit, 5...Charge load, 7...
...Carrying load, 8...Charging completion detection means, 9...Film feeding detection means, Ml...
...Charge motor, M2...Hoisting motor, COM...Microcomputer, 5WCN
I...Front curtain switch, 5wCN2...
Rear curtain switch.

Claims (1)

[Claims] 1. In a camera drive device equipped with multiple motors that share charging and film feeding of each part of the camera,
What is claimed is: 1. A camera drive device comprising a control means for controlling the drive of each motor by staggering the start of energization of the plurality of motors after the shutter operation of the camera is completed.