JPS61183628A - Driving device of camera - Google Patents

Abstract

PURPOSE:To prevent wasteful consumption of a battery by inhibiting the driving of a winding motor, when it is detected that there is no film, in a camera having the winding motor of the film and a charge motor of each part of the camera. CONSTITUTION:When photographing of one frame is ended, a control means 1 starts a charge motor M1 and a winding motor M2 through driving circuits 2, 4. An output of the motor M1 charges a charge load 3 of a shutter mechanism, a diaphragm adjusting mechanism, a mirror lifting mechanism, a lens driving mechanism, etc. through a charge transfer system K1, and when the charge is completed,a detecting means 6 sends a signal to the control means 1 and stops the motor M1. An output of the motor M2 winds a film 5 through a winding transfer system K2, and when a feed of the film is detected 7, a signal is sent to the control means 1 and the motor M2 is stopped. When it is detected that there is no film in a cartridge chamber 8, the control means 1 operates only the driving circuit 2 and does not operate the driving circuit 4. Accordingly, only the motor M1 is driven, and driving of the motor M2 is suspended.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a camera drive device in which film winding and charging of various parts of the camera are driven by separate motors.

(Background of the Invention) Conventional electric winding devices use a single drive source to wind the film and charge the various parts necessary for camera photography at the same time. Regardless of whether or not this was the case, it would drive the film winding system. In recent years, in order to improve charging efficiency, save power, and shorten winding time, cameras have been proposed that have separate motors for winding the film and charging each part of the camera. However, even in such a camera, the winding motor and the charging motor are driven at the same time, so even when the film cartridge is not stored, the winding motor and winding transmission system rotate, wasting power. This unnecessarily reduced durability performance.

(Objective of the Invention) An object of the present invention is to provide a camera that solves the above-mentioned problems, eliminates wasteful power consumption by the winding motor, and prevents unnecessary deterioration of the durability performance of the winding motor and the winding transmission system. An object of the present invention is to provide a driving device.

(Characteristics of the Invention) In order to achieve the above object, the present invention provides a control means that stops the drive control of the winding motor after the release operation is completed when no film is stored in the camera. It is characterized by driving only the motor.

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

When one frame of film has been photographed, a control means 1 comprising, for example, a microcomputer operates a drive circuit 2 to rotate the charge motor M1. As a result, a charge load 3 that requires charging such as a shutter mechanism, an aperture adjustment mechanism, a mirror elevating mechanism, and a lens drive mechanism is charged in the charge transmission system via 1. At the same time, drive circuit 4
is also operated, the winding motor M2 is driven, and the rotational force of the winding motor M2 is transmitted to the winding load 5 (including the film) through the winding transmission system 2, and the film is wound.

The charging completion detection means 6 detects that charging of all parts of the camera is completed, and the control means 1 controls the stopping of the charging motor M1 in response to this detection signal.

The film feed detection means 7 detects the winding state, such as immediately before the completion of one winding during winding, completion of winding, etc. from the movement of the film, and in response to this detection signal, the control means l controls the winding motor M.
2. Controls deceleration, stopping, etc. Note that the film may be rewound by a separate rewind motor, or may also be rewound by the winding motor M2.

When the film cartridge is not stored in the cartridge storage chamber 8 of the camera, the film storage detection means 9 provided in the cartridge storage chamber 8 mechanically, optically or magnetically detects this, and the control means 1 Input this detection signal to. As a result, the control means 1 operates only the drive circuit 2 and does not operate the drive circuit 4. Therefore, only the charge motor M1 is driven and the drive of the hoist motor M2 is stopped.

According to this embodiment, when performing aerial photography without loading film for operation check or demonstration at a store, winding motor M2 and winding transmission system 2 do not rotate, so there is no waste. This eliminates power consumption, and prevents unnecessary deterioration of the durability of the hoisting motor M2 and the hoisting transmission system 2. Note that since the charge load 3 is charged, there is no problem with the release operation, and aerial photography can be performed freely.

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. K1 is a charge transmission system for charge motor Ml. The winding motor M2 is disposed within the spool structure 22 for winding the film, and the motor M3 is disposed on the front right side of the camera 20, that is, on the cartridge side. , 3 adjacent to the unwinding transmission system
is placed. 23 is the power battery, which consists of 4 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 blade type longitudinal 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 M1 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 around a shaft 114, and is brought into frictional contact with the planetary lever 106 by a compression spring 104 disposed between the gears 1.02 and 103.

As a result, the planetary lever 106 rotates following the rotational direction of the gear 103. The gear 105 is rotatably supported by a shaft 115 mounted on the planetary lever 106.
The gear 107, which is always in mesh with the main plate 11, 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 gear 10, and the gear 103 rotates clockwise.
5 rotates counterclockwise (in the direction of the arrow), the planetary lever 106 rotates clockwise and the large gear 107a shifts to gear 1.
The gear 108 that meshes with the gear 108 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. The cam gear 109 is rotatably supported by a shaft 124 set on the base plate 117, and the gear 109a and the cam l
13 are formed. Gear 109a is always gear 108
The transmission system from the pinion gear 101 to the cam gear 109 is switched depending on the direction of rotation of the charge motor Ml. That is, when the charge motor Ml rotates counterclockwise, each part rotates in the direction of the solid arrow, and as the planetary lever 106 rotates clockwise, the pinion gear 101 → gears 102, 103 → gear 105 → gear 107 (large The gear train is switched to a low-speed gear train with a large reduction ratio, which consists of gear 107a, small gear) → gear 108 (large gear 108a, small gear) → cam gear 109. 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 second shutter charge lever 120 is rotatably supported by a shaft 127 mounted on the base plate 117, and has a roller 121 whose rotation axis is the shaft 120a.

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 charge lever 118. Therefore,
/<-122 also swings following the swing of the first shutter charge lever 118 to charge the diaphragm adjustment mechanism, mirror lifting/lowering mechanism, etc.

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 202b, and is rotatably supported, the large gear 202a meshes with the pinion gear 201, and the gear 203 is a two-stage gear having a large gear 203a and a small gear 203b. The large gear 203a meshes with the small gear 202b, and the gear 204 is a two-stage gear having a large gear 204a and a small gear 204b, and is rotatably supported, and the large gear 204a meshes with the small gear 203b. A planetary lever 219a is further rotatably supported by a bearing 219b on the central shaft of the two-stage gear 204 that meshes with the gear 204, and a compression spring 220 is disposed between the small gear 204b and the bearing 219b. Frictional contact is made with the gear 204a. This frictional contact causes the planetary lever 219a to rotate in accordance with the direction of rotation of the gear 204. On the planetary lever 219a, there is a two-stage gear 20 having a large gear 205a and a small gear 205b.
5 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 206 is arranged near the gear 205, and a large gear 206a and a small gear 206b are independently rotatably supported. However, a coil spring 215 is 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 boss 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 constantly meshed with the small gear 206b, and the shaft 218 drives the drive sprocket 29.
Rotate a. A pulse board P1 whose entire circumference is divided into 12 equal parts is fixed to the gear 207, and when the drive sprocket 29a rotates once, 12 pulses are obtained via the contact member S1. Therefore, the driving sprocket (29a) has 6 teeth, and for a 35mm full-size camera, 4/3 of the teeth are 6 teeth.
Since one frame of film is fed by rotation, the number of pulses obtained via the contact member S1 is 16. Needless to say, it is possible to arbitrarily select the equal number of pulse substrates P1, and if the deceleration control of one hoisting motor M2 is performed by intermittent energization drive (duty drive), a larger number of equal fractions can be selected. 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 configuration 22 and rotatably supported, and is always engaged with the small gear 209b.The spool 211 has a rubber member 211a around its surface that promotes automatic winding of the film. It is pasted. Further, a cover 212 is disposed near the outside of the spool 211 and is rotatable by a shaft 213 provided on the fixed part of the camera.
The cover 212, shaft 213, and spring 214 are pressed toward the spool 211 side by the spool 211 by the spool 211, and have the function of promoting automatic winding of the film onto the spool 211. 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 first hoisting motor M2 is from the binion 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 2
05 (Large gear 205a, small gear 205b) →Gear 20
6 (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 204b)
) + gear 208 (large gear 208a, small gear) → gear 2
09 (large gear 209a, small gear 209b)→spool gear 210→spool structure 22 at a large reduction ratio.

On the other hand, turn winding motor M2 clockwise.
゛When rotated, each part rotates in the direction of the dotted arrow, and gear 2
04 rotates counterclockwise to rotate the planetary lever 219a counterclockwise to move the large gear 205a to the spool gear 21.
Engage directly with 0. Therefore, the pinion gear 20
1 → Gear 202 (large gear 202a, small gear 202b) -
The transmission system is switched to a high-speed transmission system with a small reduction ratio consisting of gears 203 (large gear 203a, small gear 203b) + gears 204 (large gear 204a, small gear 204b) - + large gear 205a -> spool gear 210. Note that the transmission system to the drive sprocket 29a is cut off, and the transmission system to the drive sprocket 29a is cut off.
is 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 (2), which drives the drive sprocket (29a) at a low speed.
and rotational drive of the spool arrangement 22. After each subsequent photograph, only the spool structure 22 is rotated at high speed when the frame is advanced. 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.

Binion 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.
meshes with b. The planetary lever 306 is rotatably supported on the same axis as the gear 303, and the compression spring 305 is connected to the small gear 30.
3b and the planetary lever 306, and brings the planetary lever 306 and the large gear 303a into frictional contact. Due to this frictional contact, the planetary lever 306 rotates in accordance with the direction of rotation of the gear 303. 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 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, small gear 304b)→gear 307→fork 308. On the other hand, when the rewind motor M3 rotates counterclockwise, the planetary lever 306 rotates counterclockwise, the meshing between the small gear 304b and the gear 307 is cut off, and the rotational force is transferred to the fork. Therefore, by slightly rotating the rewind motor M3 in the clockwise direction, the rewind transmission system 3 and the rewind motor M are transmitted when the film is wound by the winding motor M2.
3 can be avoided from being added to the winding load, making it possible to wind the film with a 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 OPl having a high input impedance and having a compression diode DI 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 has the shutter time information Tv=(B
y+5v-Av) and output. The shutter speed information Tv is converted into a 4-bit digital value by the A/D converter ADC, and is displayed on the viewfinder display device DSP via the decoder driver DCD, and is also input to the microcomputer COM's input ports PGO to PG3. do. In addition, the 4-bit code 0001 to 1000
corresponds to 1/1000 seconds to 1/8 seconds, code 0000
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 swl 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 II and the resistor R3. Ru.

A capacitor Cr is connected to the terminal R5T of the microcomputer COM, and a crystal oscillator QZ is connected to the terminals xo and xi.
is connected, a power supply voltage Vcc is applied to the terminal V00, and the terminal GND is grounded.

Input ports PAO to PA3 include 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 that is turned off when the trailing curtain travel is completed and turned on when charging is completed is connected, respectively.

A first film switch s consisting of a pulse substrate P1 and a contact member Sl (FIG. 5) is connected to the input port PFO-PF4.
A second film switch consisting of wFLM1, pulse board P2 and contact piece member 32 (FIG. 5)
2. A third film switch swFLM3 consisting of a pulse board P2 and a contact piece S3, a charge switch swCG consisting of a signal board and a contact piece SO fixed to the cam gear 109 (Fig. 4), and turned on when charging is completed.
E, a cartridge storage switch SwPTIN provided in the cartridge storage chamber 310, which is turned on when the film cartridge 24 is stored and turned off when it is not stored;
are connected to each other.

Output capo) PEONPE2 has transistors TR2 to T.
The base of R4 is connected, and the transistors TR2 to TR4
are the first clamping magnet MGO made of permanent magnet material that starts the mechanical release operation, and the front curtain magnet that drives the front curtain)
The MGI controls the energization of the trailing curtain magnet MG2 that causes the trailing curtain to travel.

Output capo) PB O, PB t are winding motor M2
A drive circuit DR2 is connected to the output port pc.
o, pct is a drive circuit D that drives the rewind motor M3.
A drive circuit DRI that drives the charge motor M1 is connected to the output ports PDo and PDI.

The drive circuits DRI to DR3 have the same circuit configuration, and the circuit configuration is shown in FIG. 2 for input terminals A and H
A bit signal is input. First, if A=1 and 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 0RIO also becomes 1, and transistor TR32 turns on. .

Further, since the output of the inverter I13 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 ant gate AIO is 1, the output of OR gate 0R11 is also 1, and inverter I
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.

When A=l and B=1, the output of AND gate A11 is 1.
, the outputs of the OR gates 0RIO and 0RII also become 1, so that the transistors TR32 and TR33 are turned on.

Therefore, when the motor M is rotating, if this monide is used, 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.

A=0. When B=O, AND gate AIO~A12
All outputs become 0, and the transistors TR, 30 to T
All R33 are 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 flowchart shown in FIG.

[Step 1] By supplying the power supply voltage Vcc in response to turning on the $11 stroke switch sl,
Microcomputer COM operates. Crystal oscillator Q
Receives basic clock from Z and at the same time capacitor C
A power-on reset is applied by r. The built-in program counter is initially set to address O, and the program starts from the start. It is also assumed that the O1 output port for each flag is also 0.

[Step 2] Receive input from input ports PAO-PA3 (hereinafter referred to as PA large input; the same applies to other ports). If each part is fully charged and the photographer presses the second stroke of the release button, PAO=
Since PA1=PA2=PA3=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 0, 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 $2 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] Input the apex value Tv in shutter seconds converted into a 4-bit digital value by the A/D converter ADC. Since it is 4 bits, it can take values from θ 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] The PEO output is set to 1, the transistor TR2 is turned on, and the first clamping magnet MGO is energized from the capacitor CO charged to approximately the same voltage as the power supply voltage Vcc. This activates the mechanical release action.

[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.

[Step 10] Set the PEO output to 0 and de-energize the first clamping magnet (MGO). TIMEL is the first
It is sufficient to set the time slightly longer than the minimum time for which the MGO is energized.After this, the known mechanical sequence of stopping down and mirror up begins.

[Step 11] Receive PAL input indicating mirror status. Since the first tension magnet MGO 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
indicates the end of the film.

[Step 14] Determine flag F1. F1=O represents completion of winding.

[Step 15] Determine whether the value of internal register RGI is O. As mentioned above, the time in seconds is 1/[00
When the time is shorter than 0 seconds, PG large input 0000, that is, RG
1 = 0.

[Step 16] When RG1=0, 5 forcibly fixes RG1=1, that is, 171000 seconds.

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

[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 201: 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 not, 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, the contents of accumulator A are left-shifted 7 times. Therefore, initially the contents of accumulator A are ooooooo
What used to be t becomes iogooooo.

[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 front curtain magnet (MGI). 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 l = 0. As a result, the actual time in seconds is measured.

[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 30] As PE1=PE2=0.

(front curtain magnet) MCI and rear curtain magnet MG2 are de-energized.

[Step 311: Receive input from rear curtain switch 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] By setting PDO=O and PO2-4, the drive circuit DRI is operated and the charge motor M1 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 Ml and the hoisting motor M2 are shifted to create a waiting time for waiting for the current flowing through the charge motor M1 to become stable. This can prevent overcurrents (rush currents) during initial energization from overlapping.

[Step 35] Receives PF4 manual input indicating whether or not the film cartridge 24 is stored in the cartridge storage chamber 310.

[Step 36] If the film cartridge 24 is not stored, the process proceeds to step 37; if it is stored, the process proceeds to step 38. This is a normal routine.

[Step 37] Since the film cartridge 24 is not loaded, the flag FO is set to 0, and it is assumed that the film has not finished. It is also assumed that F1=0 and film winding has been completed. Then, the routine proceeds to step 41. Since the film cartridge 24 is not included and film winding itself is completely meaningless, this routine attempts to control the drive of the winding motor M2 and only the charge motor M1. be.

[Step 381 PBO; 0. By setting PB1=1, the drive circuit DR2 is operated and the hoisting motor M
Rotate 2. This causes the film to be wound up.

[Step 39] Timer T for timer interconnected
Set constant K to MH. The value of is determined by the film winding speed, the equal fraction of the pulse board Pi (Fig. 5) of the first film switch swFLM1, and the microcomputer CO.
is a constant determined by the instruction cycle time of M.

[Step 40] Timer T for timer interconnected
Start MR. 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
Since the timer TMR has started, the flag F3 represents the on/off state of the second film switch swFLM2, and the timer TMR repeats decrementing independently of the main program routine for a certain period of time (constant K). (depending on the timer), an interrupt occurs and the running program jumps to the dedicated timer-interrupted address. Here, timer interrelated processing will be explained with reference to FIG.

rTimer Interwoven Processing" [Step 101] Decrementing the timer TMH and interworking are prohibited.

[Step 102] First film switch SWFL
Receives PFO input from MI.

[Step 103] If FF0=0, step 104
If PFO=1, the process proceeds to step 114, respectively.

[Step 104] Since PBO=0 is the same as that set in step 38, the winding motor M2 continues to be energized.

[Step 105] Determine flag F2. Since F2=0 is set in step 40, the process proceeds to step 106.

[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 SWF
Receives PFI input from LM2.

[Step 109] Determine PFl=0.

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

[Step 110] Third film switch SWFL
Receives PF2 man power from M3.

[Step 111] Determine FF2=0.

If winding of one frame of film is not completed, PF6-
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.

In the timer-interrupted process, the three film switches SwFLMl, sw are activated from the running program at regular intervals.
The purpose is to determine the status of FLM2 and swFLM3. Since each instruction of the program itself is executed at a very high speed, it is assumed that there is virtually no problem by inputting the film winding information at regular intervals.

Assuming that the first film switch s w F L M 1 is turned off in a certain timer-interrupted process, the process proceeds from step 1'03 to step 114.

[Step 114] Determine whether flag F3=1. Since F3 was set to 0 in step 40, step 115
Proceed to.

[Step 115] Determine whether flag F2=1. Since I set F2≠0 in Stella 7'40, step 11
Proceed to step 6.

[Step 116] Set flag F2 to 1.

This means that the first film switch s w F L M 1 has been turned off, that is, PFO=1.

"Step 117" Set the latch constant M in the internal register RG2.Then, proceed to step 108 and execute the above-mentioned routine.Assume that winding has been executed for a while and it is now just before the trunk winding. When the second film switch swFLM2 is turned on, PF1=
0, and the process proceeds from step 109 to step 118. φ [Step 118] Flag F3 is set to 1. Therefore, in subsequent timer-interrupted processing,
From step 114, the process advances to step 119.

[Step 119] Set PBO=1.

Since FBI=1 has already been set in step 38, the energization of the hoisting motor M2 is cut off and the brake is applied. However, the hoisting motor M2 cannot stop immediately due to inertia and continues to rotate once. The first film switch s
When w F L M l is switched from off to on, the process proceeds from step 103 to step 104, and PBO is activated again.
= 0, the winding motor M2 is energized again. At this time, since the flag 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 Fl=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 the film cannot move any further, so the first film switch swFL
The on/off status of M1 no longer changes. Therefore, the flag F2 is fixed to O 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-0 is set, and both terminals of the first hoisting motor M2 are opened.

[Step 124] Set flag FO=0. This marks the end of the film.

The above time interwoven processing is always executed from step 40 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 41] Charge switch sw indicates that charging of the shutter, mirror, automatic aperture, etc. is completed
Inputs the signal from CGE.

[Step 42] Together with step 41, a routine is configured to wait until charging is completed. Of course, timer-interrupted processing is performed many times during this time.

[Step 43] Set the PDO output to 1. This applies a brake to charge motor M1.

[Step 44] A flag FO indicating the end of the film is determined. Assuming that the film has not yet finished, the process proceeds to step 45.

[Step 45] Same as step 2.

[Step 46] 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 what should be noted here is that the first tension magnet MGO is energized in step 8 without confirming the completion of film winding. It is.

In other words, the aperture down and mirror up operations, which are not directly related to actual photography, are executed regardless of the completion of winding, thereby speeding 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 interrupt is repeated many times, and if the winding is completed, the process proceeds to the first shutter control.

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 46 to step 47.

[Step 47] Steps 44 to 47 are repeated until completion of winding is confirmed in the timer-interrupted process, that is, until F1=0. When 6 windings are completed, 5TA
Return to RT (step 1), and in step 4 set the power supply voltage Vc
Release the latch c. 1st stroke switch swl
When both are off, power supply voltage Vcc disappears. (End of shooting sequence) 1 rewind processing j If the film ends in the middle of winding, the flag FO = 1 in the time interwoven processing, so the stay and tape 44
The process branches to step 48.

[Steps 48 to 50] 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 a strong light beam during rewinding.

The presence of both a leading and trailing curtain in the aperture completely prevents light from reaching the film surface.

[Step 51] Input the signal from the trailing curtain switch 5wCN'2.

[Step 52] Wait for trailing curtain travel to be completed, and once completed,
Proceed to step 53.

[Step 53] PCO=0. Set to PO2-4 and rotate the rewind motor M3.

[Step 54] Set internal register RG2 to Ml.

[Steps 55 to 63] Steps 102, 103, 105, 10S, 107 in timer interwoven processing
, 115, 118, 117. This program is similar to the program for detecting film movement explained in 120, and is a program that detects when the drive sprocket 29a stops rotating when rewinding is completed. Once completed, the process proceeds to step 64.

[Step 64] Set PCO=1 and 1 rewind motor M
Stop the rotation of step 3.

[Step 65] Turn 7 lag FO to indicate the end of the film.
Reset to .

[Step 6B] PDO=0. Make it PO2-4,
Rotate charge motor Ml. This is to return the shutter mechanism to the fully charged state since the trailing curtain is run in step 48 before rewinding.

[Step 67] Input the signal from charge switch swcGE.

[Step 68] Wait for charging to complete, then proceed to Step 6
Proceed to 9.

[Step 69] Stop the rotation of charge motor Ml. All rewinding processing is now complete and the 5TART
Return to (step l).

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 sets the first tension magnet MGo for the next photographing operation.
Consider the case where the film ends after the is energized.

In this case, the mechanical release operation is activated by the 1st constant 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 s
w F L M 3 remains off. therefore,
If the film is rewound in this state, the photographer may misunderstand that the shutter is open and may make a mistake. Furthermore, if strong light rays enter through the lens, there is a risk of fogging the film. Therefore, it is best to lower the mirror and then rewind the film.

After checking the mirror up in step 12, step 1
3. While waiting for the completion of winding in step 14, when the end of the film is detected in the time interwoven process, the flag FO=1 is set in step 124, so that step 13 branches to step 70.

[Step 70] PDO=,0. As PO2-4,
Rotate charge motor Ml.

[Steps 71-72] Detect completion of charging.

[Step 73] Set PDO=1 and apply a brake to the charge motor M1. Since the mirror is charged in this state, the 0th order R goes down and returns to the initial state.
Jump to WND (step 48) and perform rewind processing.

(Effects of the Invention) As explained above, according to the present invention, when no film is stored in the camera, a control means is provided that stops the drive control of the winding motor after the release operation is completed, and thereby the charging Since only the motor is driven, wasteful power consumption by the hoisting motor can be eliminated, and unnecessary deterioration of the durability performance of the hoisting motor and the hoisting transmission system can be prevented.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an 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, and Fig. 4 is a charger. Figure 5 is a perspective view showing the transmission system; Figure 5 is a perspective view showing the hoisting transmission system; Figure 6 is a perspective view showing the transmission system;
The figure is a perspective view showing the rewinding transmission system, Figure 7 is a circuit diagram showing the microcomputer and peripheral circuits, Figure 8 is a circuit diagram showing the drive circuit, and Figures 9A, 9B, and 10 are flowcharts. be. 1... Control means, 2.4... Drive circuit, 3... Charge load, 5... Hoisting load, 6... Charge Complete detection means, 7...
...Film feeding detection means, 8...Patrone storage chamber, 9...Film storage detection means, Ml.
...Charge motor, M2 ... Winding motor, 24 ... Film cartridge, 310.
...Patrone storage room, COM...Microcomputer, swPTIN...Patrone storage switch.

Claims (1)

[Claims] 1. In a camera drive device equipped with a winding motor that winds the film and a charge motor that charges each part of the camera, if no film is stored in the camera, drive control of the winding motor after the release operation is completed. 1. A camera drive device characterized by comprising a control means for stopping the operation.