JPH07104545B2 - Electric drive camera - Google Patents

Description

The present invention relates to an electric drive camera in which at least a film is wound by a motor.

(Prior Art) For film winding and feeding of a camera, a movable member conventionally called a winding pawl is dropped into a notch portion of a rotary cam accompanying feeding of a film each time one film is fed. There is known a technique in which the winding operation is forcibly stopped by means of and the film is positioned for each frame.

However, recently, various cameras have been proposed for controlling the screen interval for each frame of the film without using the winding stop claw. This detects a switch using a rotary plate that is interlocked with the movement of the sprocket that follows the winding movement of the film, and when a signal that the winding equal to one frame is completed is detected from the rotary plate switch,
By electrically shorting both ends of the motor for feeding and forcibly stopping the motor from trying to rotate due to inertia, the controllability is improved, and one frame is possible without the winding stop claw that was required in the past. It is possible to accurately calculate the screen interval for each.

In such a camera, it is general to know that the filming of all the frames of the film has been completed by the fact that the sprocket does not rotate at all even if the motor is moved to perform the winding operation.

As a method of detecting that the sprocket does not rotate, a method of recognizing that the winding end signal for one frame described above is not output even after a sufficient time for winding, or a method other than the winding end signal A method is known in which a means for independently detecting the rotational movement of the sprocket is used. Especially in the latter case, when the sprocket is operating from the rotating plate that is interlocked with the sprocket, 1
A method is generally known in which an on / off repeated signal is output a plurality of times during frame winding, and the on / off signal is not generated within a predetermined period of time.

As a screen interval for each frame, there is also known a method of detecting the ON / OFF signal and counting one frame to detect that one frame has been fed.
If there was a counting error due to chattering on the signal generation side, the frame interval would be slightly deviated.

Therefore, to calculate the screen interval for each frame,
It is more accurate to use the signal which is switched once for each frame.

[Problems that the invention is trying to solve]

However, in the above-mentioned conventional example, a malfunction may occur when the filming last frame is wound up. That is, if the film happens to be stretched and stretched at the place where the winding for one frame is completed, the film may shrink and the sprocket may slightly move because the load is lost when the motor is de-energized. In this case, since the sprocket moves in the direction opposite to the film winding direction, the film returns from the position where the film 1-frame winding completion signal is output, and when the winding operation is performed after the next shooting, the film is actually wound. Although the winding of one frame is not completed, a winding completion signal is output and the film feeding is stopped. Therefore, if the next photographing operation is performed as it is, the film is double-exposed. In addition, the above-mentioned phenomenon may continue to occur, and in such a case,
There is a risk of exposure in the same place (frame) as triple or quadruple.

The above ON / OFF signal for detecting the rotation of the sprocket is set to 1
The switch that outputs multiple times on the frame is effective as a detection of the stop of the sprocket operation when the winding completion signal does not come, but since the winding completion signal is input as an error signal first, the motor at this point It has no effect because it stops energizing.

(Object of the Invention) The present invention has been made to solve the above problems in the related art, and even when the winding completion state of all the frames substantially coincides with the winding completion position of one frame. An object of the present invention is to provide an electric drive camera capable of surely detecting completion of winding of all frames.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings. In addition,
This embodiment shows a case where the present invention is applied to a single-lens reflex camera.

FIG. 1 shows the arrangement of each unit in the single-lens reflex camera, and 10 indicates the camera body. A detachable taking lens 20 is attached to the camera body 10. 12
Is a release button, 14 is a rewind button, and 30 is a battery arranged at the bottom position of the camera body. Battery
The 50 is, of course, structured so that the camera body 10 can be easily removed from the battery storage chamber by removing the member corresponding to the battery lid so that the battery can be easily removed when replacing the battery. ing. M1 is a first motor, and this first motor M1 serves as a drive source for both the front plate system charge and mirror drive and the film rewind system drive. Reference numeral 100 indicates a mirror box drive mechanism as a front plate system, and reference numeral 200 indicates a film rewinding drive mechanism. 400 is a film winding drive mechanism, and M2 is a second motor, which is a drive source of the film winding drive system 400.

FIG. 2 shows an exploded perspective view in which the respective components are disassembled for each unit.

Next, the configuration and operation of each unit will be described based on FIG. 2 and the configuration diagram of each unit.

First, the outline of each unit will be described with reference to FIG.

In the figure, reference numeral 40 denotes a camera body, which is molded by a plastic mold as a whole, although detailed illustration is omitted.
However, metal is insert-molded in the area of the aperture 41, etc., where precision and strength are particularly required. 42a ~ 4
Reference numeral 2d denotes a mounting hole for fixing a mirror box 60 described later with a screw, 43 is a spool chamber, and 44 is a cartridge chamber. Reference numeral 50 denotes a film cartridge in which the film 52 is wound, reference numeral 54 denotes a film perforation, and 56 denotes a film leader portion. Reference numeral 60 denotes a mirror box, which is each mounting hole 42a to 42d of the camera body 40 described above.
Mounting holes 61a to 61d are formed at the positions corresponding to, and the mirror box 60 is firmly fixed to the camera body 40 by screwing together the mounting holes 42a to 42d and 61a to 61d. It Reference numeral 70 denotes a movable mirror which is rotated with respect to a finder observation position (mirror down state in FIGS. 2 and 3 (a)) for reflecting the subject light transmitted through the photographing lens 20 to a finder optical (not shown). Exposure withdrawal position that directs the subject light toward the film 52 (Fig. 3 (b))
And a mirror-up state (1), so that the two states can be obtained. Reference numeral 80 denotes a camera side mount fixed to the mirror box 60 with screws, and has bayonet claws 81a to 81c for bayonet coupling with a lens side mount (not shown) of the taking lens 20.

Reference numeral 100 denotes the entire mirror box drive mechanism, and this mechanism is entirely arranged in the mirror box 60. 200
Shows the whole film rewinding drive mechanism, a part of which is arranged in the mirror box 60 and the other is arranged on the camera body 40 side. M1 represents a first motor which is a drive source of both the mechanisms 100 and 200, and is fixed to the mirror box 60. 30
0 indicates the whole of the shutter unit, and the shutter base plate 301 is provided with a mounting hole 30 for mounting the mirror box 60.
1a and 301b are formed. Therefore, in this shutter unit 300, the mounting holes 301a and 301b are provided in the mirror box.
It is firmly fixed to the mirror box 60 by screwing together with the corresponding mounting holes 62a and 62b of 60. 400 indicates the whole film winding drive mechanism, and the second
Although not shown in detail in the drawing, the whole is unitized and is incorporated in the spool chamber 43 position of the camera body 40.

Next, the configuration of the mirror box drive mechanism 100 will be described in detail first with reference to FIGS. 2 and 3 to 5 described above.

Reference numeral 101 denotes a base plate fixed to one side surface side (the right side surface side in FIG. 2) of the mirror box 60, and the base plate 101 rotatably supports all the rotating vehicles of the mirror box drive mechanism 100. . 102 is an output gear of the first motor M, 103
Is a reduction gear that meshes with the output gear 102, 104 is a sun gear that meshes with the reduction gear 103, and 105 is a planet gear that meshes with the sun gear 104. The sun gear 104 and the planet gear 105 are planet levers.
The planet gears 105 are connected by 112, and are configured to perform a planetary motion according to the rotation direction of the sun gear 104. Specifically, the planetary gear 105 is flexibly coupled to the planetary shaft 110 as a central axis by a coil spring 111. Also, the boss 114 of the main plate 101, which serves as the central axis of the sun gear 104,
The receiver 113 and the planet shaft 110, which are loosely fitted to the
Connected at 112. Therefore, as can be understood from the operation diagram of FIG. 5A, in the counterclockwise rotation of the sun gear 104, the planetary gear 105 first revolves in the counterclockwise direction by the friction of the coil spring 111, and the transmission wheel 106. The boss 114 is moved toward the center of the revolution, and meshes with the transmission gear 106. Then, when the planetary gear 105 and the transmission gear 106 mesh with each other, the driving force overcomes the friction of the coil spring 111 (the planetary gear 105 slips with respect to the planetary shaft 110) to rotate the planetary gear 105 (clockwise rotation). ) Rotates to transmit the rotation of the first motor M1 to the transmission gear 106.

On the contrary, as understood from the operation diagram of FIG. 5 (b), when the sun gear 104 rotates in the clockwise direction, the planetary gear 105 first revolves in the clockwise direction, and the planetary gear 105 rotates as a rewinding transmission system described later. Move the boss 114 to the return gear 201 with the center of revolution as
Mesh with 1. Then, when the planetary gear 105 and the rewinding gear 210 mesh with each other, the planetary gear 105 rotates to transmit the rotation of the first motor M1 to the rewinding gear 201.

The transmission gear 106 rotating counterclockwise serves as the driving side of the mirror box drive system. A transmission shaft 107 has one end fixed to the transmission gear 106, and the worm gear 108 is fixed to the other end. The transmission shaft 107 is restricted from moving in the thrust direction by the receiving portions 115 of the main plate 101 arranged at both thrust direction positions of the worm gear 108.

Reference numeral 120 denotes a mirror drive gear that meshes with the worm gear 108 and rotates clockwise.
1 is integrally formed, and a brush (formed of a conductive material) 122 for position detection is fixed to the back surface side. The mirror drive gear 120 is rotatably supported by the boss 116 of the main plate 101. Here, the mirror drive cam
Reference numeral 121 denotes a climbing cam surface 121a for driving a mirror driving lever 130, which will be described later, in a counterclockwise direction, a flat cam surface 121b for keeping the rotational position (mirror up state) of the driving lever 130, and a clock for the driving lever 130. A downward cam surface 121c is formed to allow rotation in the direction.

Reference numeral 130 denotes a mirror drive lever composed of two lever bodies fixed in a substantially L shape, which is rotatably supported by a boss 117 of the main plate 101, and serves as the cam follower of the mirror drive cam 121. That is, the mirror drive lever 130 receives the rotational drive in the counterclockwise direction when the one end 131 is in sliding contact with the climbing cam surface 121a of the mirror drive cam 121, and is in sliding contact with the flat cam surface 121b. Keeping the counterclockwise rotation,
Sliding contact with 121c (even if not in actual contact, if the one end 131 and the descending cam surface 121c correspond in position), the clockwise rotation (return) is allowed. Then, the other end portion 132 of the mirror drive lever 130 is controlled by the rotation position of each cam surface of the above-mentioned mirror drive cam 121 to push a mirror pin 74, which will be described later, to move the movable mirror 70. Mirror up (rotation to the exposure retreat position) operation, the mirror pin 74 is continuously pushed to maintain the mirror up state, and the push of the mirror pin 74 is released to perform the mirror down (rotation return to the finder observation position). Allow for acceptance.

Reference numeral 140 is a shutter charge gear that meshes with the mirror drive gear 120 and rotates counterclockwise, and a shutter charge cam 141 is integrally formed on the front surface side. The shutter charge gear 140 is for one-to-one transmission (reduction ratio 1.0) with the mirror drive gear 120.
It is rotatably supported by the boss 118. Here, the shutter charge cam 141 is a climbing cam surface 141a for driving a shutter charge lever 150, which will be described later, in a counterclockwise direction, and a rotation position (charge state) of the shutter charge lever 150. A flat cam surface 141b for keeping and a downward cam surface 141c for permitting clockwise rotation of the charge lever 150 are formed.

Reference numeral 150 denotes a shutter charge lever formed in a substantially L shape, which is rotatably supported by a boss 119 of the main plate 101, and serves as the cam follower of the shutter charge cam 141. In other words, this shutter charge lever 15
0 indicates that the roller 151 supported at one end is rotationally driven in the counterclockwise direction by coming into contact with the climbing cam surface 141a of the shutter charging cam 141 and comes into contact with the flat cam surface 141b. Keeps the counterclockwise rotation by
When the roller 151 reaches the phase of the down cam surface 141c, the clockwise rotation is permitted. The roller 152 supported at the other end of the shutter charge lever 150 is controlled by the rotation position of each cam surface of the shutter charge cam 141 described above, and thus the shutter unit 300 described later. In this case, one end 305a of the seesaw lever 305 is pushed to carry out the charge operation of the shutter, and the push movement of the seesaw lever 305 is continued to maintain the charge operation (the shutter unit 300 will be described later, but the shutter unit 300 in this embodiment is the charge operation). Can continue to be mechanically held at the travel preparation positions of both the shutter front curtain and the rear curtain), the push-motion of the seesaw lever 305 is released, and the seesaw lever 305 returns (the shutter front curtain,
The mechanical holding of both the trailing curtains at the travel preparation positions is released, and thereafter, the shutter travel can be performed by controlling the energization of the control electromagnets).

As will be easily understood by comparing both FIG. 3 (a) and FIG. 3 (b), the mirror drive cam 12
The mirror up drive phase of the mirror drive lever 130 by 1 and the charge drive phase of the seesaw lever 305 by the shutter charge cam 141 are set to be completely deviated. That is, as shown in FIG. 3A, when the seesaw lever 305 is being pushed by the shutter charge cam 141, the mirror drive cam 121 does not push the mirror drive lever 130, and the movable mirror is not moved. 70 is in the down state (the finder observation position). As shown in FIG. 3B, when the mirror drive lever 130 is pushed by the mirror drive cam 121 to move the movable mirror 70 to the up state (exposure retracted position), the shutter charge cam 141 causes the seesaw lever 3 to move.
Without pushing 05, the shutter unit 300 releases the charge, and also releases the mechanical holding of the shutter front and rear curtains at the travel preparation position.

160 is a signal board, which is fixed to the base plate 101 with screws. Three patterns for position detection, that is, a ground pattern 161, an operation end detection pattern 162, and an overrun detection pattern 163 are formed on the signal substrate 160 by vapor deposition or the like. The relationship between each of the patterns 161 to 163 and the brush 122 fixed to the back surface of the mirror drive gear 120 will be described with reference to FIGS. 4 (a) and 4 (b).

Here, the sliding portion 122a of the brush 122 is divided into a comb-like shape to enhance the safety of contact with the patterns 161 to 163 on the signal board 160. The actual sliding position of the sliding portion 122a, that is, the contact point is a position 122b on the line slightly inside the tip of the brush.

FIG. 4 (a) shows the phase detecting the completion of the shutter charge corresponding to FIG. 3 (a).
Reference numeral 2 indicates a clockwise rotation of the mirror drive gear 120 as indicated by an arrow in accordance with the clockwise rotation of the mirror drive gear 120. In the state shown in FIG. The contact with both 162 and 162, the potential of the connector portion (land portion) 162a of the detection pattern 162 is changed to the ground level, thereby detecting the completion of the shutter charge. To explain this detection in a little more detail, the connector part (land part) 161a of the ground pattern 161 is supplied with the ground level signal in the camera control circuit described later, while the output of the connector part 162a of the operation end detection pattern 162 is It is supplied to the camera control circuit (input port P11). Then, the position of the brush 122 in front of the state of FIG. 4 (a) (can be understood by replacing the brush 122 with the position rotated counterclockwise from the position of FIG. 4 (a)).
When it is, the sliding portion 122a of the brush 122 is only in contact with the ground detection pattern 161, and the detection pattern 162 has not changed to the ground level yet. Then, from here, the mirror drive gear 120 further rotates in the clockwise direction, and at the same time, the brush 122 also rotates in the clockwise direction, and when it reaches the position of FIG. 4A, the brush 122 (conductive material) detects the end of operation. As the pattern 162 comes into contact with the pattern, the potential of the operation end detection pattern 162 changes to the ground level via the brush 122, and the camera control circuit detects the completion state of the shutter charge, and the first motor is detected. Stops the rotation drive of M1. The position of the brush 122 shown in FIG. 4 (a) and the position of the brush 122 shown in FIG. 3 (a) are different from each other because the first motor is located at the position shown in FIG. 4 (a).
Although the stop control (braking) is performed on M1, the first motor M1 cannot be stopped instantaneously, resulting in a slight overrun, and FIG. 3 (a) shows the first motor M1.
4 shows the stop position in the state where the overrun occurs. However, for the sake of explanation, the stop position of the mirror drive gear 120 (brush 122) in FIG. 3 (a) shows the state when the above-mentioned overrun becomes the maximum, and actually, a slightly smaller amount of overrun occurs. The mirror drive gear 120 can be stopped in the run. As is apparent from FIG. 3 (a), a flat cam surface 141b is formed on the shutter charge cam 141 to keep the shutter charge completed, assuming an overrun of the first motor M1. And deal with the overrun.

On the other hand, FIG. 4 (b) shows the phase for detecting the completion of mirror up, which corresponds to FIG. 3 (b).
Reference numeral 122 denotes clockwise rotation of the mirror drive gear 120, as shown by an arrow, which rotates clockwise from the state shown in FIG. 4 (a), and the sliding portion in the state shown in FIG. 4 (b). 122a switches from the contact of both the ground pattern 161 and the operation end detection pattern 162 to the non-contact of the detection pattern 162, and the potential of the connector portion (land portion) 162a of the detection pattern 162 is changed from the ground level to the initial level (normally H Mirror up completion is detected by changing to (level). This detection will be further described in detail. By replacing the brush 122 with a position before the state of FIG. 4 (b) (the brush 122 is replaced with a position rotated counterclockwise from the position of FIG. 4 (b)). Touchable), the sliding part 122a of the brush 122 is in contact with both the ground pattern 161 and the operation end detection pattern 162, and the output of the connector part 162a of the operation end detection pattern 162 is still controlled by the camera. It supplies a ground level signal to the circuit. Then, from here, the mirror drive gear 120 further rotates in the clockwise direction, and at the same time, the brush 122 also rotates in the clockwise direction and reaches the position of FIG. 4 (b). Upon transitioning to the contact state, the potential of the operation end detection pattern 162 changes from the ground level to the initial level, the camera control circuit detects the mirror up completion state, and controls the rotation drive of the first motor M1 to stop. To do. In addition, the above-mentioned fourth
The position of the brush 122 of FIG. 3B is different from the position of the brush 122 of FIG. 3B described above because the first motor M1 is stopped at the position of FIG. 4B (braking). However, the first motor M1 cannot be stopped instantaneously and a slight overrun occurs, and FIG. 3 (b) shows a state in which the first motor M1 has the overrun. Shows the stop position at. However, the stop position of the mirror drive gear 120 (brush 122) in FIG. 3 (b) shows the state when the above-mentioned overrun is the maximum for the sake of explanation, and in reality, it is a little smaller amount of overrun. The mirror drive gear 120 can be stopped in the run. Incidentally, FIG. 3 (b)
As is clear from the above, the first mirror
Assuming the motor M1 overruns, the flat cam surface 121b for continuing the mirror up completion state is formed,
We are dealing with the overrun.

Here, adding a more general description of the relationship between the shutter charge and the mirror up described above, first of all, all the operations, that is, the shutter charge and the mirror up, and the shutter release and the mirror down allowance are the first. This is performed by rotating the motor M in the same direction. That is, as the first motor M1 shown in FIG. 5A rotates counterclockwise (the output gear 102 rotates counterclockwise), the planet gear 105 rotates counterclockwise and meshes with the transmission gear 106. In this state, all the operations are performed. Then, the rotational force of the first motor M1 causes the mirror drive gear 120 to rotate in the clockwise direction, and the shutter charge gear 140 to rotate in the counterclockwise direction. Further, when the mirror drive cam 121 of the mirror drive gear 120 is in the position (FIG. 3 (a)) that allows the mirror down, the position of the shutter charge cam 141 of the shutter charge gear 140 causes the shutter charge ( 3 (a)) and when the mirror drive cam 121 is in the position for mirror up (FIG. 3 (b)), the shutter charge cam 141 releases the shutter charge (first position). Three
(B)). Then, the above-mentioned operation is repeated by the counterclockwise rotation of the first motor M1, but the first motor M1 includes the brush 122 and the patterns 161-116.
When the shutter charge is completed (Fig. 3 (a)) by sliding contact with 3, the camera controller once again rotates in the same direction when the camera control circuit detects a release operation, and then completes the mirror up (3rd). (B)) Once again, when the camera control circuit detects that the traveling of the shutter is completed, the camera rotates again in the same direction, and when the next shutter charge is completed (Fig. 3 (a)), The sequence of stopping is repeated. The overrun detection pattern 162 is for detecting that the overrun at the time of the stop operation of the first motor M1 has exceeded a predetermined level, and the potential change of this pattern 162, specifically, the fourth run
When the overrun detection pattern 163 temporarily changes from the initial level to the ground level at the time of completion of the shutter charge in FIG. 4A, or when the mirror up in FIG. 4B is completed, the detection pattern 163 is temporarily initialized from the ground level. When the level changes, it is detected that the overrun has exceeded a predetermined level.

Next, the structure of the movable mirror 70 rotatably supported by the mirror box 60 will be described.

The movable mirror 70 comprises a support frame 72 and a reflecting mirror 71 fixed to the support frame 72.
A rotary shaft 73 is formed at both ends of the support frame 72, and the rotary frame 73 is rotatably supported in the mirror box 60. A mirror pin 74 is formed on one side surface of the support frame 72, and the mirror pin 74 and the mirror drive lever 130 can be engaged with each other. The support frame 72 is constantly subjected to a spring biasing force in the counterclockwise direction (mirror down direction) by the spring 75, and the mirror drive lever 130 is in the mirror down allowable state (FIG. 3 (a)). In this case, the movable mirror 70 is rotated counterclockwise by the urging force of the spring 75 to return to the mirror-down state (the finder observation position).

Next, the structure of the shutter unit 300 assembled to the mirror box 60 will be described with reference to FIGS. 6 (a) and 6 (b).

Incidentally, the single unit of the shutter unit 300 in this embodiment has already been applied for as Japanese Patent Application No. 61-39629.

FIG. 6 (a) shows a completed state of the shutter charge, and FIG. 6 (b) shows a state in which both shutter curtains are running after the shutter charge is released.

In these figures, 301 is a shutter base plate forming the support frame, and 301a is its exposure opening.

302 is a shutter unit 3 for charging the blade drive levers (hereinafter simply referred to as drive levers) 303, 304 afterward.
A charge lever in 00, which constitutes a shutter drive means. The rear driving lever 303 is for moving the rear blade group 351, and the front blade driving lever for 304 is for moving the front blade group 352.

Reference numeral 305 is a seesaw lever for charging the shutter unit. The seesaw lever 305 is rotatably supported by a rotary shaft 335 installed on the shutter base plate 301 and is engaged with one end 305a of the third shaft.
When a rotating force is applied in the direction of the arrow in the figure by the roller 152 of the shutter charge lever 150 of the shutter charge mechanism shown in the figure, the other end 305b rotates counterclockwise in FIG. The foot 302c of the charge lever 302 is provided so as to rotate in the clockwise direction in the figure via the link lever 306 connected to the state of FIG. 6 (b) to the state of FIG. 6 (a). To end the charge.

Reference numerals 307 and 308 denote front tightening levers 307 and rear tightening levers 308, 321, and 322 that prevent the rotation of the front driving lever 304 and the rear driving lever 303 that are changed by the charge lever 302 until a shutter traveling signal is issued from a camera control circuit described later. A rear blade traveling arm that holds the group 351 in parallel links and rotates the rotating shafts 326 and 327 to move the rear blade group 351, and 323 and 324 are the front blade group 3
52 are held in parallel links and each has a rotary shaft 32
This is a leading blade running arm that runs the leading blade group 352 by rotating around 8,329.

In this embodiment, in addition to the above construction, a pair of two light shielding blades 341 and 342 are further linked from the retracted position of FIG. 6 (b) to the rotation of the seesaw lever 305 for the charge adjustment. 6 has a shading device configured to move upward to the shading position shown in FIG.

The light-shielding device in this example is composed of two L-shaped light-shielding blades.
341 and 342 are moved upward and downward by the engagement of the pin and the long groove with the shutter base plate 301 at the L-shaped rising portion, and the L-shaped leg portions 341a and 342a are connected to the seesaw lever 305. By connecting the shafts 331 and 332 to each other, an upward movement and a downward movement are provided.

In the guide mechanism, the guide pin 371 planted in the shutter base plate 301 is the L-shaped rising portion 341c, 342c of the light shielding blade 341, 342.
It is configured by being fitted and engaged with the long grooves 341b and 342b formed in the above and below and which are generally in the vertical direction.

With the above configuration, the light shielding blades 341 and 342 are the seesaw lever 3
By the counterclockwise rotation of the diagram of 05, the seesaw lever 305 rotates clockwise by performing upward movement of FIG. 6 (b) → FIG. 6 (a) while maintaining the substantially illustrated posture by the guide mechanism. 6 (a) → FIG. 6 (b), and the light-shielding blades 341, 342 and the rotary shafts 331, 332 of the seesaw lever 305 are connected to each other by a certain amount. The strokes of the upward movement and the downward movement are different from each other, so that the accommodation volume is reduced due to the overlapping at the retracted position, and the cover of the light shielding area over a predetermined range due to the deviation spread at the light shielding position is obtained. ing. Note that 360
Is a spring member that constantly biases the seesaw lever 305 in the clockwise direction (charging release direction).

FIG. 7 shows the tension release configuration. The configuration for releasing the restraint itself uses the configuration of Japanese Patent Application Laid-Open No. 57-17936, which has been filed earlier by the present application and has already been published.

In the figure, reference numeral 307 denotes a substrate having a tension release configuration, which carries the tension release configuration controlled by an electromagnet. The substrate 370 is assembled to the shutter base plate 301 shown in FIG.
Reference numerals 380 and 386 respectively denote an armature lever for the leading blade and an armature lever for the trailing blade, which are rotatably supported by yokes 382 and 388 mounted on a substrate 370 by shafts 381 and 387, respectively, and clockwise by springs 384 and 390, respectively. ， It is biased counterclockwise. 385 and 391 are substrate 3
It is a stopper pin that is planted in 70 and regulates the initial rotation positions of the armature levers 380 and 386, respectively. One end 380a of the armature lever 380 can abut the pin 307a of the first tightening lever 307 to release the tightening at a position rotated counterclockwise by a predetermined distance from the initial rotating position shown in FIG. . Also, one end 386a of the armature lever 386 is the seventh
At a position rotated clockwise by a predetermined distance from the initial rotation position shown in the figure, the pin 308a of the rear tightening lever 308 can be contacted to release the tightening. Reference numerals 383 and 389 are coils, which are energized to turn the armature levers 380 and 386 into springs 3 respectively.
The suction is rotated against 84,394. In the figure, 37
0a is in the shutter charge state (Fig. 6 (a)),
This is a cutout portion with which the pin 307a of the tip tension lever 307 abuts. Although omitted in FIG. 6 because the drawing is complicated, the tip tension lever 307 is biased counterclockwise by a weak spring so that the pin 307a abuts the inner edge of the cutout portion 370a. It is set. Also, in the figure, 370b
Is a cutout portion with which the pin 308a of the rear tensioning lever 308 abuts in the shutter charge state (FIG. 6 (a)).
Although omitted in FIG. 6 due to the complexity of the drawing, the rear tensioning lever 308 is biased clockwise by a weak spring so that the pin 308a contacts the inner edge of the notch 370b. Has been done. In FIG. 2, reference numeral 392 is a cover that also serves as a dustproof and electromagnetic shield.

The operation of the above-mentioned shutter unit will be described above.

When the camera completes a series of shooting operations and the shutter completes running, the camera enters the state shown in FIG. 6 (b).

Then, a charge operation is immediately performed to prepare for the next shooting operation.

This charge operation is given by the counterclockwise rotation drive of the shutter charge lever 150 shown in FIGS.

In this charge operation, an operating force in the direction of the arrow in the figure is applied to the tip 305a of the seesaw lever 305 from the roller 152 of the shutter charge lever 150, and the shaft 305 at the other end of the seesaw lever 305 is applied.
A rotational movement (clockwise direction in the figure) is given to the charge lever 302 via a link lever 306 engaged with b and a shaft 302c planted in the charge lever 302.

With the rotation of the charge lever 302, the foot portions 302a, 302b of the charge lever contact the roller portions 303a, 304a of the drive levers 303, 304, respectively, and give the drive levers 303, 304 a rotational movement.

When the drive levers 303 and 304 rotate, their respective shafts 303b and 30
4b and the holes 321a and 323a are engaged with each other to give rotational movement to the trailing blade traveling arm and the leading blade traveling arm 321 and 323, and the rear blade group 351 and the leading blade group 352 linked to the respective arms are shown in the upper part of the drawing. Move up to.

When the charge progresses in this way and the projections 303c, 304c of the drive levers 303, 304 reach the position where they can be engaged with the tips of the tightening levers 307, 308, the shutter charge is finished and the sixth release waits for the next release operation. The state shown in FIG.

Here, in the process of charging the seesaw lever 305, the light blocking blades 342 of the light blocking blades 341 rotatably attached to the rotating shafts 331 and 332 on the seesaw lever 305, respectively.
Are moved upward in the figure. At this time, the light-blocking blade 34
Since 1 and the light shielding blade 342 are engaged with the guide pin 371 by the respective guide long grooves 341b, 342b, the posture thereof is regulated by the guide pin 371 and moves upward in the figure while being substantially horizontal in the figure, Fig. 6 (a) when the charge is completed
To cover the lower part of the exposure opening 301a of the shutter base plate 301.

In this state (Fig. 6 (a)), the charge is completed, and the state of waiting is kept in this state until the next release operation is performed.

Next, the release operation will be described.

When the release button 12 is pressed, the mirror up operation described with reference to FIG. 3 is performed, and at the same time, the shutter charge lever 150 is moved from the position shown in FIG. 6 (a) to the position shown in FIG. 6 (b). evacuate. Next seesaw lever 305
Is rotated clockwise in the figure by the spring member 360, and the charge lever 302 linked to the seesaw lever 305 is rotated counterclockwise by the link lever 306, and the charge lever is rotated from the state shown in FIG. The state shown in FIG.

With the rotation of the seesaw lever 305, the rotation shaft 331
The seesaw lever 305 and the shading blade 341 and the shading blade 342, which are rotatably attached to the seesaw lever 305, by the 332, respectively
It is regulated by the guide pins 371 by b and 342b and moved downward while keeping the horizontal state in the figure, and moves from the state of FIG. 6 (a) to the state of FIG. 6 (b) to expose the shutter base plate 301. Retreat outside the opening 301a.

When the camera control circuit detects that the above-described operation is completed and the mirror up is completed (detects that the potential of the mirror up detection pattern 162 changes from the ground level to the initial level in the state of FIG. 4B), In the camera control circuit, the coil 383 of FIG. 7 is first energized, the armature lever 380 is attracted to the attracting surface of the yoke 382, and the spring is moved.
Rotate counterclockwise against 384. Then, by the suction rotation of the armature lever 380, the one end 380a is pin 3
When 07a is pushed, the leading clamp lever 307 rotates clockwise to disengage from the protrusion 304c, the leading drive lever 304 rotates clockwise, and the leading blade traveling arm 323 moves in the same direction. To rotate the leading blade group 352 (running downward in the drawing) to start exposure. Then, at a predetermined shutter time, the camera control circuit energizes the coil 389 of FIG. 7, the armature lever 386 is attracted to the attracting surface of the yoke 388, and rotates clockwise against the spring 390. . And
By the suction rotation of this armature lever 386, one end 3
86a pushes the pin 308a, and the rear tightening lever 308 rotates clockwise to disengage from the protrusion 303c.
3 rotates in the clockwise direction, and the trailing blade traveling arm 321 also rotates in the same direction, causing the trailing blade group 351 to travel (running downward in the drawing) to end the exposure.

The explanation so far is for the mirror box drive mechanism 100 and the shutter unit 300 that are built into the mirror box 60.
About.

Next, the film rewinding drive mechanism 200 will be described.

In FIGS. 2, 3, and 5, 201 is a rewinding gear, which is rotatably supported by a hole in a main plate 210 and a boss 212a of a main plate 212 that unitizes the film rewinding drive mechanism 200. The main plate 210 is arranged in the camera body 40 above the cartridge chamber 44 in FIG. 2, but when the mirror box 60 is assembled to the camera body, the rewinding gear 210 is moved by the planet gear 105. It is arranged and set at a position where it can be meshed when it revolves clockwise. 202 is a rewinding fork, and 203 is a connecting member. A connecting member 203 is fixed to the lower portion 201a of the rewinding gear 201 by a screw 205, while the rewinding fork 202 is independently movable in the thrust direction with respect to the connecting portion 203 and is interlocked with the rotating direction. Is supported as. The coil spring 203 serves to constantly urge the rewinding fork 202 downward, and when the film cartridge 50 is loaded into the cartridge chamber 44, the rewinding fork 202 resists the coil spring 203. It becomes possible to move upward. Reference numeral 202a in the drawing denotes a fork portion of the rewinding fork 202, which meshes with the cartridge shaft 51 of the film cartridge 50.

The operation of the film rewinding drive mechanism 200 will be described.

First used as drive source for mirror box drive mechanism 100
The motor M1 also serves as a drive source of the film rewinding drive mechanism 200. However, the rotation direction of the first motor M1 in the film rewinding drive is clockwise rotation as shown in FIG. 5 (b). That is, when the first motor M1 rotates in the clockwise direction, the sun gear 104 rotates in the clockwise direction via the output gear 102 and the reduction gear 103, and the planet gear 105 revolves in the clockwise direction by the friction of the coil spring 111. It meshes with the return gear 201.

Then, when the planet gear 105 and the rewinding gear 201 mesh with each other,
This time, the driving force overcomes the friction of the coil spring 111 (the planet gear 105 slips around the planet shaft 110), and the planet gear 105 rotates counterclockwise to rewind the gear 2.
The rotation of the first motor M1 is transmitted to 01. And further,
The clockwise rotation of the rewinding gear 201 is transmitted to the rewinding fork 202 through the connecting member 204, and the rewinding fork 202 is rewound.
The rotation of the film rotates the patrone shaft 51 of the film patrone 50 in the rewinding direction (clockwise direction) to rotate the film.
52 rewinds are performed.

Next, the film winding drive mechanism 400 will be described with reference to FIGS. 8 and 9. The film winding drive mechanism 400 alone in the present embodiment has already been filed as Japanese Patent Application No. 61-53455.

FIG. 8 shows an exploded perspective view of the entire structure of the film winding drive mechanism 400. In the drawing, 401 is a spool, and rubber is attached to the cylindrical peripheral surface 401a in order to improve the sticking of the film. An engaging projection 401b is formed on the lower end edge thereof, which engages with a gear 410 described later. A sprocket 402 has a plurality of claws 402a that mesh with the film perforation 54. 403 is a film guide, which is a guide roller 40 that is rotatably supported.
3a is formed. M2 is a second motor arranged inside the spool 401, and a motor pinion (output gear) 404a is configured as an output. 405 is the above motor cana 404
A transmission gear that meshes with a is denoted by 406, which is a sun gear that is common to two planetary clutches that will be described later, and that meshes with the transmission gear 405. Specifically, the sun gear 406 has a two-stage gear structure including a large gear 406a that meshes with the transmission gear 405 and a small gear 406b that constantly meshes with planetary gears 411 and 413, which will be described later. 412
Is a spool-side planetary lever, which is pivotally supported coaxially with the sun gear 406 and is flexibly coupled to the sun gear 406 by a coil spring or the like, and in accordance with the rotation of the sun gear 406, It is configured to swing in the rotation direction. Also, this spool side planet lever 412
A spool-side planetary gear 411 that meshes with the small gear 406b is rotatably supported at the swing end position. Reference numeral 414 denotes a sprocket-side planetary lever, which is pivotally supported coaxially with the sun gear 406 and is flexibly coupled to the sun gear 406 by a coil spring or the like.
It is configured to swing in the rotation direction according to the rotation of 406. Also, this sprocket side planetary lever 414
A sprocket-side planet gear 413, which meshes with the small gear 406b, is rotatably supported at the swing end position. Reference numeral 409 denotes a spool-side transmission gear, which is arranged at a position where it can mesh with the spool-side planetary gear 411, and the sun gear 406 rotates counterclockwise to move the spool-side planetary lever 412 counterclockwise. When rocked, the planetary gear on the spool side
411 and the large gear 409a of the transmission gear 409 mesh with each other, and the meshing is released as the sun gear 406 rotates clockwise. 410
Is a spool gear that meshes with the small gear 409b of the transmission gear 409, and is fixed to the spool 401 by the engagement protrusion 401b of the spool 401 to rotate the spool 401.

On the other hand, 407 is a sprocket-side transmission gear, which is arranged at a position where it can mesh with the sprocket-side planetary gear 413, and the sun gear 406 rotates counterclockwise to rotate the sprocket-side planetary lever 414 counterclockwise. When it is swung in the direction, the sprocket-side planetary gear 413 and the transmission gear 407
Of the transmission gear 407a is engaged with the large gear 407a of the transmission gear 407a and is disengaged as the sun gear 406 rotates clockwise.
It is a sprocket gear that meshes with the small gear 407b, and is fixed to the sprocket 402 to rotate the sprocket 402. Reference numeral 415 is a holding lever fixed to the sprocket-side planetary lever 414, and a holding pin 415a is formed at the tip. Reference numeral 416 denotes a holding switching member that can obtain two states, a holding state and a releasing state, of the holding lever 415 at the rotating position, and the claw portion 41 that hooks the holding pin 415a.
6a, the abutment pin 4 against which the projection 416b and the biasing spring 440, which are pushed by the opening and closing of the back lid 430 to be described later, come into contact.
16c is formed and is rotatably supported in a tubular state as a whole. Reference numerals 417 and 418 are base plates for axially supporting the various gears described above, and are mounted on the camera body 40 near the spool chamber 43 in FIG. Reference numeral 420 denotes a rotating substrate for detecting the rotation state of the sprocket 402, which rotates in conjunction with the sprocket 402. On the lower surface of the rotating substrate 420, a first pattern portion 42 having a ring shape around the center is formed near the center.
0a is formed, and a second pattern portion 420b composed of a plurality of radial patterns connected to the first pattern portion 420a is formed in the vicinity of the outer diameter, and the second pattern portion 420b is further formed.
A third pattern 420c is formed by further radially extending one of the above. Reference numerals 422, 423 and 424 denote sliding brushes for sliding on the rotating substrate 420 to convert the rotation state of the sprocket 402 into an electric pulse signal. The sliding brush 422 slides on the first pattern portion 420a. The sliding brush 424 slides on the second pattern portion 420b, and the sliding brush 423 slides on the third pattern portion 420c. Although a detailed connection circuit is not shown in this figure, As is well known in this type of rotation detection, for example, by applying a power supply level voltage to the sliding brush 422, it is possible to output a pulse signal in the sliding brush 424, 423 according to the rotation of the sprocket 402. it can.

As described above, the film winding drive mechanism 400 described with reference to FIG.
Then, the sun gear 40 which is rotated by the rotation of the second motor M2
Starting from 6, spool planetary gear 411 → transmission gear 40
9 → spool gear 410 → spool 4 like spool 401
The first winding transmission system that rotates 01 and the sun gear
A second hoisting transmission system for rotating the sprocket 402 is constructed, such as sprocket-side planetary gear 413-> transmission gear 407-> sprocket gear 408-> sprocket 402, with 406 as a starting point. The peripheral speed ratio of the spool 401 by the first winding transmission system is set to be larger than the peripheral speed ratio of the sprocket 402 by the second winding transmission system, and the spool speed of the film leader 56 to the spool 401 is increased. It is designed to improve tightening. Further, the sun gear 406, the spool side planet gear 411, the spool side planet lever 412, and the transmission gear are included in the first hoisting transmission system 411, 409, 410, 401.
A first planetary clutch composed of 409 is constructed, and a sun gear 40 is also provided in the second winding transmission system 413, 407, 408, 402.
6, a second planetary clutch composed of the sprocket side planetary gear 413, the sprocket side planetary lever 414 and the transmission gear 407 is constituted.

Next, the operation of the film winding drive mechanism 400 will be described with reference to FIG.

FIG. 9 (a) shows the initial state of the AL start, in which the small gear 406b of the sun gear 406 rotates counterclockwise to swing both planet levers 412 and 414 counterclockwise, and the spool side planet gear 411 meshes with the spool-side transmission gear 409 (large gear 409a) to rotate the spool 401 in the winding direction, while the sprocket-side planet gear 413 meshes with the sprocket-side transmission gear 407 (large gear 407a). Also by rotating in the winding direction, the film leader can be fed to the spool 401 and wound around the spool 401. The back lid 430 is in the closed state, and the elastically deformable elastic projection 403a holds the projection 416b at the position shown in the figure,
The holding switching member 416 is prevented from rotating counterclockwise beyond the position shown by the urging force of the urging spring 440. Although the elastic projection 430 of the back lid 430 is set so as not to be deformed so much by the urging force of the urging spring 440, naturally, the rotation of the holding switching member 416 at a slight angle in the counterclockwise direction is elastic. It is set to allow deformation. The back cover detection switch 480 described in FIG. 9 (a) and FIG. 9 (e) described later has the back cover 43 with the contact pieces 481 and 482 connected and disconnected.
The open / closed state of 0 can be detected.

By winding the film by a predetermined number of frames in the state of FIG. 9 (a), the film leader portion is wound around the spool 401 if the AL is successful.

FIG. 9 (b) shows a state in which the second motor M2 is temporarily stopped, then reversely rotated and started to rotate in the clockwise direction during the AL, that is, after the sprocket 402 is driven by a predetermined number of frames of the film. The small gear 406b of the gear 406 rotates clockwise to swing both planetary levers 412 and 414 clockwise. Therefore, the spool-side planetary gear 411 is disengaged from the spool-side transmission gear 409 (large gear 409a), while the sprocket-side planetary gear 413 also has a sprocket-side transmission gear 407.
The engagement with (large gear 407a) is released. In addition, as the sprocket-side planetary lever 414 swings clockwise,
The holding lever 415 also moves in the direction of the arrow to the right in the figure, and is in a state immediately before the holding pin 415a is locked by the claw portion 416a of the holding switching member 416.

FIG. 9 (c) shows that the second motor M2 is further rotated in the clockwise direction from the state shown in FIG. 9 (b), and the sprocket-side planetary lever 414 is further swung in the clockwise direction to hold the above-mentioned holding. It shows a state in which the pin 415a is completely locked by the claw portion 416a, and in this state, the sprocket-side planetary lever
414 is held at the position shown in the figure, so that it cannot be rocked even when the sun gear 406 is rotated counterclockwise thereafter.

FIG. 9 (d) shows that the second motor M2 is again rotated counterclockwise to rotate the spool 401 only by one film in order to determine the final operation of the AL, that is, whether the AL succeeded or failed. The driven state is shown. That is, when the small gear 406b of the sun gear 406 rotates counterclockwise, the spool side planetary lever 412 swings counterclockwise, causing the spool side planetary gear 411 to move to the spool side transmission gear 409.
It meshes with (large gear 409a) to rotate the spool 401 in the winding direction. On the other hand, the planet lever 414 on the sprocket side
Since the holding lever 415 is held by the holding switching member 416, the holding lever 415 cannot swing even when the small gear 406b of the sun gear 406 rotates in the counterclockwise direction, and the sprocket-side planet gear
413 and the sprocket-side transmission gear 407 are held in a disengaged state. Therefore, if this 9th
The leader of the film 52 is already in the state before the figure (d).
If 56 is securely wound around the outer circumference 401a of the spool 401,
Even when the spool 401 alone is driven in FIG. 9 (d), the film is further wound by one frame, and the sprocket 402 is rotated by the movement of the film. On the other hand, if the leader portion 56 of the film 52 is not properly wound around the outer periphery 401a of the spool 401, the film 52 does not move only by driving the spool 401 in FIG. 9D, so the sprocket 402 does not rotate. In this state of FIG. 9 (d), the sprocket 402 is 1
By detecting whether or not the frame rotates properly by the camera control circuit, which will be described later, it is extremely easy to determine whether AL has succeeded or failed.

FIG. 9 (e) shows the back cover 430 for replacing the film cartridge 50 with a new one after the filming of all the film frames is completed.
As shown in the figure, the holding switching member 416 is released from the holding (pushing) by the elastic projection 430a of the back lid 430, and is counterclockwise by the urging force of the urging spring 440. The holding pin 415a of the holding member 415 is unlocked by the claw portion 416a by rotating the holding pin 416a. Therefore, when the back lid 430 is closed again for the next shooting, the holding switching member 416 can be returned to the state of FIG. 9 (a). Of course, in this returning state, the holding lever 415, That is, the holding of the sprocket side planetary lever 414 can be released.

In this embodiment, both the spool 401 and the sprocket 402 are driven to rotate by the second motor M2 until the middle of AL, so that the film leader portion 56 can be fed and wound around the spool 401 at the initial stage of AL. Yes, on the other hand, at the final stage of AL, only the spool 401 was rotationally driven and the sprocket 402 was freed.In this state, it is easy to detect whether the sprocket 402 is driven by the film 52 or not. It is characterized by being able to judge success and failure. Therefore, the success or failure of AL can be determined by the rotating substrate 420 that works in conjunction with the sprocket 402, and a rotating wheel driven only by the conventional film can be newly configured as a detection mechanism or the film perforation 54
It is possible to confirm the success or failure of AL with a simpler configuration than that of a detection mechanism that optically reads the movement of the AL.
Further, in the present embodiment, the rotating substrate 420 for detecting the success or failure of AL is also used as one frame winding detection at the time of normal photographing after AL, and this also simplifies the overall configuration. Contribute to.

Next, based on FIG. 10, an electric diaphragm mechanism 500 configured in the taking lens 20 shown in FIG. 1 will be described. In the figure, M3 is a third motor, which is fixed to a fixed cylinder (not shown). 510 is a ring-shaped fixed ring with an optical axis of 0.
A plurality of holes 512 are formed at equal intervals on the circumference centered on. Reference numeral 520 denotes a ring-shaped diaphragm drive ring, which is rotatably supported and has a plurality of cam holes (oblong holes) 522 radially formed at equal intervals on the circumference. Reference numeral 530 denotes an aperture blade, which is arranged between the fixed ring 510 and the aperture drive ring 520, and pins 532 and 534 planted on both surfaces thereof are holes 512 of the fixed ring 510 and cam holes of the aperture drive ring 520, respectively. It has been inserted in 522. A gear cylinder 540 is rotatably supported and fixed to the diaphragm drive ring 520.
A tooth portion 542 is formed on the peripheral surface of the gear cylinder 540,
The tooth portion 542 meshes with the output gear 502 fixed to the output shaft 504 of the third motor M3.

Next, the operation will be described. When the third motor M3 rotates counterclockwise, the gear cylinder 540 rotates clockwise, and accordingly, the diaphragm drive ring 520 also rotates clockwise, and the diaphragm blades 530 move. It is driven in the closing direction (counterclockwise direction) by sliding with the cam hole 522. That is, the diaphragm is driven from the opening to the narrowing direction.

On the other hand, the gear cylinder 54 is rotated by the clockwise rotation of the third motor M3.
0 rotates counterclockwise, the diaphragm drive ring 520 also rotates counterclockwise accordingly, and the diaphragm blade 530 is driven in the opening direction (clockwise direction) by sliding with the cam hole 522. That is, the diaphragm is driven in the opening direction from the narrowed state.

Next, an embodiment of a circuit configuration for controlling each mechanism described above will be described with reference to the drawings.

FIG. 11 is a circuit diagram showing the overall configuration of the camera control circuit. In FIG. 11, BAT is a power supply battery, CON is a DC / DC converter, and MC1 is a microcomputer (hereinafter abbreviated as a microcomputer). The DC / DC converter CON is supplied with an unstable voltage of 4 to 6 V from the power supply battery BAT from the input terminal IN, converts it to a stable voltage of 5 V, and outputs it to the output terminal OU.
Output from T. However, the DC / DC converter CON outputs a voltage of 5 V when a high level signal is input to its input terminal CNT, and stops the voltage conversion operation when a low level signal is input, Output voltage. The control input terminal CNT of the DC / DC converter CON is connected to the output terminal P4 of the microcomputer MC1 and its operation is controlled by the microcomputer MC1.

MC2 is a microcomputer with a built-in E ² PPOM (non-volatile memory) that enables high-speed arithmetic processing, AD1 is an A / D converter, and R1 and R2 are resistors. BUS1 is a bus line for communication between the microcomputer MC2 and the A / D converter AD1. Resistors R1 and R2 are power batteries
A / D converter connected in series to divide the voltage of BAT
Input to the input terminal IN of AD1. A / D conversion AD1
/ D conversion, the converted value through the bus line BUS1 microcomputer MC
Send to 2.

SPD is a silicon photodiode, AMP, for measuring the external light volatility (brightness of subject light that has passed through the taking lens 20).
Is an amplifier for amplifying the output of the silicon photodiode SPD and for temperature compensation, and AD2 is an A / D converter for the output of the amplifier AMP.
It is an A / D converter for conversion, and the output terminals OUT and A of the amplifier AMP
The input terminal IN of the / D converter AD2 is connected. BUS2 is A
It is a bus line for communication between the / D converter AD2 and the microcomputer MC2, and the A / D converter AD2 transmits a photometric value to the microcomputer MC2 through the bus line BUS2. The A / D converters AD1 and AD2, the amplifier AMP, and the microcomputer MC2 use DC / DC converter CON
Supplied from the stable voltage of 5V output from, it operates the circuit. Therefore, when the DC / DC converter CON stops the voltage conversion operation, the circuit is in a non-operation state.

The SBP is a switch (back cover detection switch 480 shown in FIG. 9) that is linked to the back cover of the camera. When the back cover is closed, the circuit is turned off, and when the back cover is opened, the circuit is turned on. The SRW is a switch that works in conjunction with the rewind button 14 (see FIG. 1) used when rewinding the film. It is normally off, but it turns on when the rewind button 14 is pressed.

SW2 is a switch that works in conjunction with the release button 12 (see Fig. 1), which is normally off and turns on when the release button 12 is pressed.

SCN2 is a switch that is linked to the rear curtain of the shutter of the camera, and turns on when the rear curtain of the shutter has finished running.

Switches SBP, SRW, SW2 are input ports P1, P2,
It is connected to the input ports P5, P6, P7 of P3 and microcomputer MC2, respectively, so that both microcomputers MC1, MC2 can independently detect ON / OFF. Switch SCN2 is a microcomputer MC
It is connected to the input port P8 of 2 and only the microcomputer MC2 can detect ON / OFF.

BUS3 is a bus line for communication between the microcomputer MC1 and the microcomputer MC2. The DISP is a display device using, for example, a liquid crystal display for displaying the shutter speed after photometry calculation, the aperture value, and the operating state of the camera. DR is a display drive integrated circuit (hereinafter referred to as an IC) that is connected to the display DISP and drives the display DISP to display. Display drive IC DR and microcomputer MC2
Are connected by a bus line BUS4, and display information is transmitted from the microcomputer MC2. The DR of the display driving IC drives the display DISP based on this data.

The power supply of the microcomputer MC1 and the display drive IC DR is the power supply battery BA
It is supplied from either T or DC / DC converter CON through diodes DI1 and DI2, respectively. Therefore, while the power supply battery BAT is attached to the camera, circuit operation is always performed.

MG31 is a coil with an electromagnet structure for starting the front curtain of the shutter (corresponding to coil 383 in Fig. 7) MG32 is a coil with an electromagnet structure for starting the rear curtain of the shutter (corresponding to coil 389 in Fig. 7) Is.

The coil MG31 is connected to the collector of the transistor TR1,
The coil MG32 is connected to the collector of the transistor TR2. The base of the transistor TR1 is connected to the output port P13 of the microcomputer MC2 via the base resistor R3, and similarly, the base of the transistor TR2 is connected to the output port P14 of the microcomputer MC2 via the base resistor R4. The microcomputer MC2 can control the shutter time by outputting signals from the output ports P13 and P14.

The microcomputers MG31 and MG32 are also used as the actual load resistance when checking the voltage while the shutter is locked so that it will not run, but this control is also performed by the microcomputer MC2 by the signal output from the output ports P13 and P14. It is possible.

M2 is the second motor (especially the eighth motor) for winding the film.
(See FIG. 9 and FIG. 9), and one end of both terminals of the second motor M2 has a PNP transistor TR15 and an NPN transistor.
The collector of TR16 is connected, and the collectors of PNP transistor TR18 and NPN transistor TR17 are similarly connected to the other end. The bases of the transistors TR15, TR16, TR17, TR18 are connected to the output ports P15, P16, P17, P18 of the microcomputer MC2 via base resistors R15, R16, R17, R18, respectively.

The emitters of the transistors TR15 and TR18 are connected to the (+) side of the power supply battery BAT, and the emitters of the transistors TR16 and TR17 are connected to the (-) side.

By outputting signals from the output ports P15, P16, P17, P18, the microcomputer MC2 can operate the second motor M2 for normal rotation and reverse rotation. For example, by outputting a high-level signal from output ports P15 and P16 and outputting a low-level signal to P17 and P18, transistors TR16 and TR18 are turned on, transistors TR15 and TR17 are turned off, and as a result, the current flows to the left. To the right, the second motor M2 rotates forward.

Conversely, by outputting a low level signal from output ports P15 and P16 and a high level signal to P17 and P18, transistors TR16 and TR18 are turned off and transistors TR15 and TR17 are turned on. Flows from right to left, and the second motor M2 rotates in reverse.

M1 is a first motor for driving the charger and the mirror of the shutter, one of the two terminals of the motor M1 is connected to the collectors of the PNP transistor TR19 and the NPN transistor TR20, and the other end is also the same. PNP transistor TR22, N
The collector of the PN transistor TR21 is connected. The bases of the transistors TR19, TR20, TR21, TR22 are connected to the output ports P19, P20, P21, P22 of the microcomputer MC2 via base resistors R19, R20, R21, R22, respectively.

The emitters of the transistors TR19 and TR22 are connected to the (+) side of the power supply battery BAT, and the emitters of the transistors TR20 and TR21 are connected to the (-) side.

The microcomputer MC2 outputs signals from the output ports P19, P20, P21, P22 as in the control of the second motor M2.
It is possible to freely operate the first motor M1 for forward rotation and reverse rotation.

A switch with a conductive pattern drawn on the SM1 rotating substrate (the rotating substrate 420 shown in FIG. 8, patterns 420a to 420).
(corresponding to c), the rotating substrate switch SM1 rotates in conjunction with the sprocket 402 of the film winding drive mechanism 400. The signal from switch SM1 is input port P9 and P1 of microcomputer MC2.
Connected to 0, the microcomputer MC2 can detect the ON / OFF signal of the pattern on the rotating substrate accompanying the rotation of the second motor M2. Similarly, the switch SM2 is a brush sliding switch that rotates in association with the vertical movement of the mirror and the rotation of the cam that performs shutter charging (corresponding to the switch composed of the brush 122 and the signal board 160 shown in FIGS. 3 to 4). so,
The signal from switch SM2 is input port P11,
Since it is connected to P12, the microcomputer MC2 is the first motor
It is possible to detect the on / off signal that accompanies the unidirectional rotation of M1.

TR3 is a third motor M3 for driving the diaphragm on the lens side through the mount contact (contact type contact arranged on the opposite side of the camera mount part of the camera body and the lens mount part of the taking lens).
A switching transistor for switching between power supply and stop of power supply, and R6 is a base resistance of the transistor. The base of the transistor TR3 is connected to the output port P23 of the microcomputer MC2 via the base resistor R6. As a result, the microcomputer MC2 can control the power supply of the third motor M3 for driving the diaphragm on the lens side. R5 is microcomputer MC2
This is a resistor to keep the transistor TR3 in the OFF state when the power supply is stopped while the DC / DC converter CON is in the OFF state. It is provided between.

MC3 is a microcomputer installed in the camera lens that can be attached to the camera, and M3 is a third motor also installed in the lens.
At M3, the diaphragm blade (see FIG. 10) is closed or opened by this third motor M3.

The collectors of PNP transistor TR23 and NPN transistor TR24 are connected to one end of the two terminals of the third motor M3, and the collectors of PNP transistor TR26 and NPN transistor TR25 are similarly connected to the other end. Transistor TR
The bases of 23, TR24, TR25, TR26 are resistors R23, R2 respectively.
Output port P23, P24, P2 of microcomputer MC3 via 4, R25, R26
5, connected to P26.

The emitters of the transistors TR23 and TR26 are connected to the (+) side of the power supply battery BAT via the mount contact between the camera and the lens and the switching transistor TR3.
The R16 and TR17 emitters are also connected to the (-) side of the power supply battery BAT via the mount contact between the camera and lens.

The microcomputer MC3 outputs signals from the output ports P23, P24, P25, P26 and can freely rotate the third motor M3 in the forward and reverse directions.

BUS5 is a bus line for communicating between the camera-side microcomputer MC2 and the lens-side microcomputer MC3 via a microcomputer contact. The microcomputer MC2 on the camera side is this bus line BUS5
Command the lens side microcomputer MC3 to drive the third motor M3 so as to narrow the diaphragm blade to a predetermined position, or reversely drive the third motor M3 to return the diaphragm blade to the open position. Can be ordered to do.

In addition, the microcomputer MC3 passes its power through the mount contact,
It is supplied from the power supply battery BAT or the DC / DC converter CON through the diodes DI1 and DI2, respectively.

Next, the operation of the control circuit of the camera connected as described above will be described based on the flow chart.

SCI is a bus line for communication for the microcomputer MC2 to communicate with the outside. The external terminal may be outside the camera body, or may be shaped so that it can be connected with the penta cover of the camera removed. The camera communicates with an external host computer through this communication line, and by rewriting the data in the E ² PROM, it can be a camera with a specification that performs automatic rewinding or a camera with a specification that prohibits automatic rewinding. .

FIG. 12 is an operation flow of the microcomputer MC1.

When the power supply battery BAT is turned on, the power-on reset is applied to the microcomputer MC1 and the operation starts from step 1. The flow chart will be described below.

[Step 1] A high level signal is output to the output port P4, a stable voltage of 5 volts is output from the DC / DC converter CON, and the microcomputer MC2 and the photometric amplifier AMP and the A / D converters AD1 and AD2 are output.
Supply power to.

[Step 2] The back lid switch SBP is read to check the open / closed state of the back lid 430. When the back cover is open, the process branches to step 3, and when the back cover is closed, the process branches to step 5.

[Step 3] Check the flag X, which is a flag storing the previously opened / closed state of the back lid. When the flag X is 0, the back cover is open. Flag X is 1
If so, the process branches to step 4, and if 0, the process branches to step 7. Immediately after the power is turned on, the content of the flag may be 0 or 1.

[Step 4] The flag X is set to 0 in order to remember that the back lid is open. After this, the process branches to step 9.

[Step 5] If the flag X is 0, the process branches to step 6, and if the flag X is 1, the process branches to step 7.

[Step 6] The flag X is set to 1 in order to remember that the back cover is closed. After this, the process branches to step 9.

[Step 7] The state of the switch SRW is read to check whether the rewind button 14 is pressed. If the rewind button 14 is pressed, the process branches to step 9, and if not, the process branches to step 8.

[Step 8] Read the state of the release switch SW2 to check whether the release button 12 is pressed. If release switch SW2 is on, step 9
If off, branch to step 10 if off.

[Step 9] Same as step 1, DC / DC converter CON
Turn on.

[Step 10] It is determined whether or not the DC / DC converter CON is currently on, and if the DC / DC converter CON is off, the process returns to step 2. Thereafter, the reading of the switch is repeated until the open / closed state of the back cover changes or the switch SRW or the release switch SW2 which is interlocked with the rewind button 14 is turned on.

[Step 11] Communicates with the microcomputer MC2 and receives an instruction issued from the microcomputer MC2.

[Step 12] If the instruction from the microcomputer MC2 is an off instruction of the DC / DC converter CON, go to step 13 and the DC / DC converter
If it is not the command to turn off the CON command, the process returns to step 11 and waits until the command to turn off the DC / DC converter CON is received.

[Step 13] A low level signal is output to the output port P4, the DC / DC converter CON is turned off, and the DC / DC converter CON is stopped from outputting a stable voltage of 5 volts.

The above is the operation of the microcomputer MC1. As can be seen from this flow, the microcomputer MC1 turns on the power, when the back lid open / close switch SBP changes from on to off, or from off to on, and the rewind switch SRW, release switch SW2.
DC / DC converter CON is operated when is turned on,
Power is supplied to the microcomputer MC2, the photometric amplifier AMP, and the A / D converters AD1 and AD2. After the power is supplied, the DC / DC converter CON is turned on until the DC / DC converter OFF command of the microcomputer MC2 is received. When the DC / DC converter CON OFF command is received, the DC / DC converter CON is turned off.

Next, the microcomputer MC2 after the DC / DC converter CON is turned on.
The operation of will be described. It should be noted that the microcomputer MC1 is always in operation after the power supply battery BAT is turned on, and the microcomputer MC2 is set to
The power is supplied only when the / DC converter CON is turned on, and the operation is started on the assumption that the microcomputer MC1 is a low-power consumption type low-speed microcomputer that only needs to perform the work of detecting the switch. This is because the microcomputer MC2 is supposed to have high power consumption and high-speed processing.

FIG. 13 is a flow chart showing processing after power supply to the microcomputer MC2.

The flow chart will be described below.

[Step 14] Read back cover switch SBP. It branches to step 15 when the back cover is open, and to step 18 when the back cover is closed.

[Step 15] Check the flag I that stores the previous open / closed state of the back lid. When the flag I is 0, the back cover is open. If the flag I is 1, the process branches to step 16, and if the flag I is 0, the process branches to 20. Microcomputer
For the memory contents of MC2, E ² PROM (nonvolatile microcontroller MC2 is not lost in the contents of the memory even after turning off the power supply
There is no problem because it has a ROM) type memory. Even if you do not have an E ² PROM type memory, you can back up the memory with an external button-type lithium battery and save only the memory contents even if the power supply to the DC / DC converter CON is stopped. Known publicly known techniques may be used.

[Step 16] Since the back lid has changed from the closed state to the open state, the flag I is set to 0 to remember that the back lid is open.

[Step 17] Although the contents of the film counter are stored in the memory, the memory of this film counter is set to zero.

[Step 18] Check the flag that remembers the previous open / closed state of the back lid. If flag I is 1, step 20
If the graph I is 0, the process branches to step 19.

[Step 19] Since the back lid has changed from the open state to the closed state, the flag I is set to 1 in order to remember that the back lid is closed. After this, the process branches to step 23, which is the autoloading sequence of FIG. 13B.

[Step 20] Read the state of the switch SRW to check whether the rewind button 14 is pressed. If the rewind button 14 is pressed, the process branches to the rewind sequence of FIG. 13D. Step 21 if not pressed
What.

[Step 21] Read the state of the release switch SW2 to check whether the release button 12 is pressed. If release button 12 is not pressed, step
If the release button 12 is pressed to 176, the process branches to the release sequence of FIG. 13F.

[Step 176] Communicate with the external host computer through the bus line SCI.

[Step 177] It is determined whether or not the content of communication from the outside is a rewriting instruction of the flag Z of the E ² PROM. When the rewriting instruction of the flag Z, it is determined to step 178, otherwise it is determined that the host computer is not connected. Time is step 22
What.

[Step 178] It is determined whether the flag Z is set to 0 to set the automatic rewinding prohibition mode or the flag Z is set to 1 to set the automatic rewinding mode. If it is set to 0, the process branches to step 180.

[Step 179] Set the flag Z of the E ² PROM to 1, and then go to step 22.

[Step 180] Set the flag Z of the E ² PROM to 0, and then go to step 23.

[Step 22] A process for ending the operation is performed. Outputs a command to the microcomputer MC1 to stop the operation of the DC / DC converter CON. After this, the microcomputer MC1 turns DC / DC
By turning off the converter CON, the operating power supply of the microcomputer MC2 is cut off, and the processing ends.

Next, the flow of the autoloading sequence of FIGS. 13B and 13C will be described. The autoloading sequence is a sequence that jumps from the open state to the closed state as described in the processing flow after power supply.

[Step 23], [Step 24], [Step 25] A, G,
Set each flag of C to 0.

[Step 26] Perform a voltage check. The voltage check is performed by energizing the coils MG31 and MG32 of the shutter control electromagnet for 10 milliseconds and reading the voltage from the A / D converter AD1, but the details are omitted because the flow becomes complicated. If the voltage has dropped as a result of the voltage check, step 27
If there is enough voltage, go to step 28.

[Step 27] Data is transmitted to the DR of the display drive IC so as to display a warning that the voltage has dropped, and then the above-described step 22 is jumped to the END processing.

[Step 28] The second motor M2 is rotated in the normal direction (the sun gear 406 rotates counterclockwise as shown in FIGS. 8 and 9 (a)) in order to perform auto loading. The control of the second motor M2 is performed by the signal output from the output ports P15, P16, P17 and P18. Details are as described above.

[Step 29] A timer for counting the energization time of the second motor M2 is started.

[Step 30] Check the flag A which is a flag for storing the previous state of the input port P9. Flag A is 0
When the flag A is 1, the previous state of the input port P9 is stored as the switch-on state, and when the flag A is 1, the previous state of the input port P9 is stored as the switch-off state. The signal input to the input port P9 is a signal interlocked with the sprocket 402 (obtained from the sliding brush 424 shown in FIG. 8) as described above, and it is fed a plurality of times (for example, 12 times) while winding one frame of film. ) A signal that repeats on / off (the output of the sliding brush 424 repeats the initial level and the ground level) is input, and if the on / off signal is repeatedly input, the microcomputer MC2 rotates the sprocket 402. If the ON / OFF repeat signal is stopped, the microcomputer MC2 determines that the sprocket 402 has stopped. In step 30, when the flag A is 1, it branches to step 33, and when the flag A is 0, it branches to step 31. Immediately after the operation of the auto loading sequence, the flag A is set to 0 in step 23, and therefore the process branches to step 31.

[Step 31] The previous state of the input port P9 is compared with the present state. If it has changed, go to step 32. If it has not changed, go to step 36.

[Step 32] Since the input state of the input port P9 has changed, the flag A is newly set to 1.

[Step 33] Similar to step 31, compares the previous status and the current status of the input port P9, and if there is a change, the step 34
To step 36, if not changed.

[Step 34] Since the input state of the input port P9 has changed, the flag A is newly set to 0.

[Step 35] The timer for counting the energization time of the second motor M2 is restarted from the beginning.

[Step 36] Since there is no change in the input port P9, the second
Check the timer that counts the energization time of the motor M2, and if there is no change in the input port for a predetermined second (for example, 350 milliseconds), determine that the sprocket 402 is stopped, and go to step 37. If the time of 350 milliseconds has not yet passed, go to step 38.

[Step 37-1] The energization of the second motor M2 is stopped, and jumping to an empty charge sequence (step 37-2) described later is performed.

[Step 38] The flag C, which is a flag for storing the previous state of the input port P10, is checked. When the flag C is 0, the state of the previous input port P10 is stored as the switch-on state, and when the flag C is 1, the previous input port P10 is stored.
The state of is stored as the switch-off state. The signal input to the input port P10 is a signal linked to the sprocket 402 (obtained from the sliding brush 423 shown in FIG. 8).
Then, the switch is turned on (the output of the sliding brush 423 is switched to the ground level) when the winding corresponding to one frame of film is completed. Further, when the winding of the next frame of one film is started, it is immediately turned off (the output of the sliding brush 423 is switched from the ground level to the initial level), and is turned on when the winding of the next one frame is completed. . Therefore, the microcomputer MC2 can control the winding of one film by detecting this signal. In step 38, when the flag C is 1, the process branches to step 41, and when the flag C is 0, the process branches to step 39. Immediately after the operation of the auto loading sequence, the flag C is set to 0 in step 25, and therefore the process branches to step 39.

[Step 39] The previous state of the input port P10 is compared with the present state. If so, return to step 40. If not, return to step 30.

[Step 40] Since the input state of the input port P10 has changed, the flag C is newly set to 1. After that, the process returns to step 30 to continue the auto loading operation.

[Step 41] The previous state of the input port P10 is compared with the present state. If it has changed, the process returns to step 42, and if it has not changed, the process returns to step 30 to continue the autoloading operation.

[Step 42] Since the input state of the input port P10 has changed, the flag C is newly set to 0.

[Step 43] Since the signal at the input port P10 has switched from OFF to ON, the winding of one frame has ended, and the memory G, which is a memory that counts the number of winding frames during auto loading. Is incremented.

[Step 44] Check whether or not three empty windings have finished in auto loading. After the completion of 3 frames, the process branches to step 48, and when not after the completion of 3 AL frames, the process branches to step 45.

[Step 45] Check if four empty films have been wound in auto loading. If 4 frames have been completed, return to step 46. If AL 4 frames have not been completed, return to step 30 to continue auto loading.

[Step 46] Since the four films have been finished to be wound up by auto loading, the second motor M2 is stopped.

[Step 47] Data is sent to the DR of the display driving IC so as to display the completion of the autoloading, and then the process is branched to the above-mentioned step 22 to end the processing.

[Step 48] Steps 48 to 53 are sequences relating to the switching of the film driving method after the winding of three frames is completed. At step 48, the second motor M2 for feeding is once stopped.

[Step 49] 10 until the second motor M2 stops completely
Wait 0 ms.

[Step 50] Second for switching the film driving method
The motor M2 is rotated in the reverse direction (the sun gear 406 rotates clockwise as shown in FIGS. 8 and 9B).

[Step 51] Reverse rotation energization is performed for 100 milliseconds (energization is performed until the state shown in FIG. 9C).

[Step 52] Stop the reverse rotation of the second motor M2.

[Step 53] Until the second motor M2 stops completely 10
Wait 0 ms. After that, the process returns to step 28, and the last 4 frames are automatically wound in the auto loading.

Specifically, the second motor M2 again rotates normally (the sun gear 406 again rotates counterclockwise as shown in FIGS. 8 and 9D). However, in this state, FIG. 9 (d)
The rotation of the second motor M2 is sprocket
Not transmitted to 402, but transmitted to spool 401. Therefore, in such a sprocket-free state, the film 52 is actually fed in the winding direction (by the rotation of only the spool 401), and the sprocket 402 is driven to rotate by the engagement of the film perforation 54 and the sprocket 402. If so, the autoloading has succeeded. Conversely, if the sprocket 402 is not driven to rotate, for example, the autoloading fails because the film leader 64 is not properly wound around the spool 401. You can judge what you have done.

Next, the empty charge sequence in FIG. 13C will be described. The empty charge sequence is performed when it is determined that the sprocket 402 has stopped rotating midway during auto loading, as described in the auto loading sequence (FIG. 13B). As will be described later, the 13th
Jump from the sequence of rewinding in Figure E.

[Step 37-2] In order to start the mirror up, the first motor M1 is energized in the forward direction (see FIGS. 3 (a), (b), 5th).
As shown in FIG. 4A, the counterclockwise rotation of the first motor M1 starts the counterclockwise rotation of the sun gear 104).

[Step 54] A timer for counting the energization time of the first motor M1 is started.

[Step 55] When the brush starts moving, wait 15 milliseconds so that it is not affected by the chattering.

[Step 56] The state of the input port P11 (the output signal of the operation end detection pattern 162 in FIGS. 3 and 4) is checked. The signal input to the input port P11 is a signal interlocked with the mirror drive gear 120 and the shutter drive gear 140 (mirror drive cam 121, shutter drive cam 141) described with reference to FIGS. 3 and 4. In the sliding state of the rotating brush 122 (which is always brought to the ground level by sliding with the ground pattern 161) and the operation end detection pattern 162, the completion of the shutter charge and the completion of the mirror up can be detected as a potential change.

Specifically, when the shutter charge is completed (the movable mirror 70 is in the down state), the input port P11 is turned on (the potential changes from the initial level to the ground level), and when the movable mirror 70 is completely up (the shutter charge is released), the input port is turned on.
The phases of the ground pattern 161, the operation end detection pattern 162, and the brush 122 are set so that P11 is turned off (the potential changes from the ground level to the initial level).

Then, in step 56, if the mirror-up completion state is reached, the process branches to step 60, and if the mirror-up completion state is not reached yet, the process branches to step 57.

For reference, the relationship between the input port P11 and the input port 12 will be described here. Input port P12 is shown in Figs.
It becomes the output signal of the overrun detection pattern 163 in the figure, and the rotating brush 122 and the overrun detection pattern 1
In the sliding state with 63, the amount of overrun of the first motor M1 at the completion of the shutter charge (the state in which the motor rotates after the stop control until it actually stops) and the first at the completion of the mirror up Detection of whether or not the amount of overrun of the motor M1 is within the allowable setting range can be determined as a change in potential. Specifically, if the input port P12 remains off (initial level) when the shutter charge is completed, the overrun amount is within the setting range, and if it is on (changes from the initial level to the grand Rembel), the overrun amount is set. It can be determined that the range has been exceeded. If the input port P12 remains on when the mirror up is completed, the overrun amount is within the set range, and if it is off, it can be determined that the overrun amount exceeds the set range.

The relationship between the input ports P11 and P12 is normally that the input port P11 is on, the input port P12 is off, and the input port P11 is on and the input port P11 is on when the movable mirror 70 starts moving when the shutter charge is completed (mirror down state). P12 is on,
Input port P11 is off, input port P12 is on when mirror up is completed (shutter charger is released), and input port P11 is in the middle of shutter charge (while the movable mirror 70 is moving down).
Is turned off, and input port P12 is turned off.

[Step 57] Check the timer that measures the time since the first motor M1 was energized. If 500 milliseconds have elapsed, return to step 58, and if 500 milliseconds have not elapsed, return to step 56.

[Step 58] Since the mirror drive is not completed within the time, it is determined that an accident has occurred and the energization of the first motor M1 is stopped.

[Step 59] Display data is output to the DR of the display drive IC so as to display an accident, and jump is performed to step 22.

[Step 60] Since the mirror up has been completed, the mirror is brought down (shear charge) next. Therefore, the timer # 2 is restarted.

[Step 61] As explained in step 56, the input port P11 is turned on in the phase of mirror down (shutter charge completed). Therefore, in step 61, the input port P11 is checked. If mirror down (shatter charge) is completed, step 61 is performed. If the mirror down (shutter charge) is not completed, the process branches to step 62.

[Step 62] Check the timer that measures the time since the first motor M1 was energized. If 1 second has elapsed, the process branches to step 58, and if 1 second has not elapsed, the process branches to step 61.

[Step 63] Since the mirror down (shutter charge) is normally completed, the power supply to the first motor M1 is stopped and the jump to step 22 is performed.

This completes the empty charge sequence.

Next, the rewinding sequence in FIG. 13D will be described.
In the rewind sequence, the process when the rewind button 14 is pressed is performed as described in the process flow after power supply. Also, as will be described later, when the film is finished during normal winding and the film is in the winding and tensioning state, jumping occurs.

[Step 64], [Step 65] The flags A and C used for the subsequent processing are cleared to 0.

[Step 66] Check the battery voltage BAT. Since the method is the same as step 26 of the autoloading sequence, the details are omitted. Go to step 68 when battery is full, go to step 67 when voltage is low.

[Step 67] Data is transmitted to the DR of the display driving IC so as to display a warning that the voltage has dropped, and then the process branches to step 22 to end the processing.

[Step 68] Check whether or not the movable mirror is in the phase of down (shutter charge completed), and if the mirror is down correctly (shutter charge completed), branch to step 76. If the movable mirror is not properly down and is stopped midway (if the shutter charge is stopped midway), branch to step 69.

[Step 69] First motor M1 to move the movable mirror down to the correct position (complete the shutter charge).
Rotate forward.

[Step 70] A timer for counting the energization time of the first motor M1 is started.

[Step 71] As explained in step 56, the switch of the input port P11 is turned off in the phase of the mirror down (the shutter charge is completed).
Check P11. If mirror down (shutter charge) is completed, the process branches to step 75. If mirror down (shatter charge) is not reached, the process branches to step 72.

[Step 72] Check the timer that measures the time since the first motor M1 was energized. If one second has passed, the process returns to step 73. If one second has not passed, the process returns to step 71.

[Step 73] Since the mirror drive has not been completed within 1 second, it is determined to be an accident and the power supply to the motor M1 is stopped.

[Step 74] Display data is output to the DR of the display drive IC so as to display an accident, and the process is branched to step 22 to end the processing.

[Step 75] Since the mirror down (shutter charge) has been normally completed, the energization of the first motor M1 is stopped.

Then proceed to step 76.

[Step 76] The reverse rotation of the second motor M2 is started in order to release the spool-side planetary gear 411 in the state shown in FIG. 9 (d) from the spool-side transmission gear 409 (freely mesh the spool 401). .

[Step 77] Wait 100 milliseconds to make sure that the planetary gear 411 on the spool side is released.

[Step 78] The reverse rotation of the first motor M1 for rewinding is started. That is, as shown in FIG. 5 (b), the sun gear 104 is rotated clockwise so that the planet gear 105 and the rewinding gear 201 are engaged with each other, and the rewinding gear 201 is subsequently rotated.

[Step 79] The timer counting the energization time of the first motor M1 is started.

[Step 80] The flag A which is a flag for storing the previous state of the input port P9 is checked.

When the flag A is 0, the previous state of the input port P9 is stored as the switch-on state, and when the flag A is 1, the previous state of the input port P9 is stored as the switch-off state. In addition,
The signal input to the input port P9 is a signal linked to the sprocket 402 as described above, and a signal that is repeatedly turned on / off a plurality of times (for example, 12 times) is input while the film frame is rewound. If the input is repeated, the microcomputer MC2 determines that the sprocket 402 is rotating, and if the on / off repeating signal is stopped, the microcomputer MC2 determines that the sprocket 402 is stopped. In step 80, when the flag A is 1, the process branches to step 83, and when the flag A is 0, the process branches to step 81.

[Step 81] The previous state and the present state of the input port P9 are compared. If it has changed, it branches to step 82, and if it has not changed, it branches to step 86.

[Step 82] Since the input state of the input port P9 has changed, the flag A is newly set to 1.

[Step 83] Similar to step 81, the previous state and the current state of the input port P9 are compared, and if there is a change, step 84
To step 86, if not changed.

[Step 84] Since the input state of the input port P9 has changed, the flag A is newly set to 0.

[Step 85] The timer for counting the energization time of the first motor M1 is restarted.

[Step 86] Check the timer counting the energization time of the first motor M1. If there is no change in the input port for 350 milliseconds, it is judged that the sprocket 402 is stopped, and the operation proceeds to step 87. , If the time of 350 milliseconds has not yet elapsed, the process branches to step 90.

[Step 87] Stop energizing both the motors M1 and M2. Then proceed to step 88.

[Step 88] Check if the rewinding is complete. If the frame counter is 0, the process branches to the above-mentioned empty charge sequence, and if the counter remains, the process branches to step 89.

[Step 89] Display data indicating that the rewinding is stopped halfway is sent to the display driving IC DR, and the process branches to step 22 to end the processing.

[Step 90] Check the flag C which is a flag for storing the previous state of the input port P10. When the flag C is 0, the previous state of the input port P10 is stored as the switch-on state, and when the flag C is 1, the previous input port P10 is stored.
The state of is stored as the switch-off state. Note that the signal input to the input port P10 is
With the signal linked to 02, the switch turns on when the rewind corresponding to one frame of film is completed. Also, if you continue rewinding one frame of the next film, it will turn off immediately,
After all, it turns on when the rewinding of one frame is completed. Therefore, the microcomputer MC2 can control the winding of one film by detecting this signal. In step 90, if flag C is 1, go to step 99, flag C
When is 0, the process branches to step 91.

[Step 91] The previous state of the input port P10 is compared with the present state. If it has changed, the process returns to step 92, and if it has not changed, the process returns to step 80 to continue rewinding.

[Step 92] Since the input state of the input port P10 has changed, the flag C is newly set to 1. After that, the process returns to step 80, and then rewinding is continued.

[Step 93] The previous state of the input port P10 is compared with the present state. If it has changed, the process returns to step 94, and if it has not changed, the process returns to step 80 to continue rewinding.

[Step 94] Since the input state of the input port P10 has changed, the flag C is newly set to 0.

[Step 95] Since the signal of the input port P10 is switched from off to on, the rewinding of one frame is completed, and the memory counting the number of frames is subtracted. Then, it returns to step 80 and continues rewinding.

Next, the release sequence of FIG. 13E will be described.
In the release sequence, the process when the release button 12 is pressed is performed as described in the process flow after power supply.

[Step 96] Communicate with the AD converter AD2 and read the photometric AD conversion value.

[Step 97] The shutter speed and aperture value are transmitted to the display driving IC and DR based on the photometric AD conversion value.

[Step 98] Perform a voltage check. The voltage is checked, and if the voltage has dropped, it branches to step 99, and if there is a voltage at which the voltage can be released, it branches to step 100. The voltage check here looks only at whether or not the release is possible. For example, when the voltage value Vo is Vo <3 volts, the voltage is branched to step 99, and when Vo3 is 3 volts, the voltage is branched to step.

[Step 99] Send display data for displaying a warning that the voltage has dropped to the DR of the display drive IC.

[Step 100] Repeat the voltage check. Check the voltage and branch to step 101 if the voltage is fairly high, or to step 102 if the voltage is not too high. The voltage check here is to judge whether or not the motor can be energized by the subsequent operation, although the release is possible. For example, when the voltage value Vo is Vo <4 volts, the step is checked.
Branch to 102 and branch to step 101 when Vo> 4 volts.

[Step 101] The flag E, which is a flag indicating that the voltage is high, is set to 1.

[Step 102] The flag E, which is a flag indicating that the voltage is low, is set to 0.

[Step 103] The forward rotation of the first motor M1 is started in order to make the mirror up.

[Step 104] The timer # 2, which is a timer counting the energization time of the first motor M1, is started.

[Step 105] Until the rush current at the start of energization subsides 1
Wait 5 ms.

[Step 106] Check flag E, which is a flag that stores the high and low voltage states, and if the voltage is high, step 106
If the voltage is low, it branches to step 107.

[Step 107] When the voltage is slightly low, wait another 15 ms for recovery of the rush current.

[Step 108] A high level signal is output from the output port P23, and power is supplied so that the third motor M3 for driving the diaphragm blades on the lens side can be driven. Then, the microcomputer MC3 on the lens side is instructed to narrow down the aperture blades of the lens to the position of the calculated aperture value.

[Step 109] The input port P11 is checked, and if the mirror up is completed, the flow branches to step 111. If the mirror up is not completed, the flow branches to step 110.

[Step 110] Check the timer that measures the time since the first motor M1 was energized. If 500 milliseconds have passed, the procedure returns to step 112, and if 500 milliseconds has not passed, the procedure returns to step 109 to wait until the mirror-up completion state is reached.

[Step 112] Since the mirror up operation has not been completed within 500 milliseconds, it is determined that an accident has occurred and the energization of the first motor M1 is stopped.

[Step 113] Display data is output to the DR of the display drive IC so as to display an accident, and the process branches to Step 22 to end the processing.

[Step 111] Since the input port P11 is turned off and the mirror up is completed (shutter charge is released), the power supply to the first motor M1 is stopped.

Next, in steps 200 to 203, a case will be described in which the overrun amount of the first motor M1 at the completion of the mirror up becomes equal to or more than the predetermined amount.

[Step 200] Wait 3 milliseconds to wait for the time spent in the overrun.

[Step 201] Check the input port P12. As described in detail in the explanation of the empty charge sequence (Fig. 13C), if the overrun amount at the completion of the mirror up is within the set range, the input port P12 turns on and the flow branches to step 114 to normal However, when the overrun amount exceeds the set range, the input port P12 is turned off and the step 20 as the abnormal state avoidance sequence is executed.
Branch to 2. Here, the problem when the overrun amount exceeds the set range will be described. That is, the mirror drive gear 120 may further rotate clockwise from the state of FIG. 3B. In the worst case, 121b and mirror drive lever 1 on the flat cam surface of the mirror drive cam 121.
The sliding contact with the one end portion 131 of 30 is disengaged, the one end portion 131 slides in contact with the descending cam surface 121c, and the movable mirror 70 rotates in the down direction (the finder observation position direction), so that the proper film 52 This causes a problem that exposure cannot be performed.

[Step 202] The first motor M1 is again energized in the forward rotation direction. As a result, the mirror drive gear 120 again rotates in the clockwise direction, and the movable mirror 70 is once moved down the mirror by the sliding of the mirror drive cam 121 and the mirror drive lever 130, and then continuously re-up the mirror. or,
The shutter charge gear 140 again rotates counterclockwise, and the shutter charge lever 150 is rotated for charge and released for charge. However, even if the shutter charge lever 150 rotates again in this state, the shutter unit 300 is only empty-charged and has no adverse effect.

[Step 203] When the first motor M1 is restarted, the brush 122 shown in FIG.
And wait 50 milliseconds as the time to slide. Then, after that, the process returns to step 109 again, and when the mirror up is completed (the input port P11 is off), the rotation of the first motor M1 is stopped at step 111. In this state, if the overrun amount falls within the set range, the process proceeds to step 114.

[Step 114] Communicates with the lens microcomputer MC3 and confirms whether the diaphragm has been stopped down to a predetermined position. If the diaphragm blade 530 has stopped down to a predetermined position, the operation returns to step 115. If not, the operation returns to step 114 to return to the stop blade. Wait until 530 is squeezed.

[Step 115] A high level signal is output from the output port P13 for 10 milliseconds to energize the coil 383 of the electromagnet for controlling the shutter front curtain of the shutter to run the front curtain of the shutter. As a result, the film exposure operation is started.

[Step 116] Wait for film exposure time.

[Step 117] A low-level signal is output from the output port P14 for 10 ms, and the coil 389 of the electromagnet for controlling the rear curtain of the shutter is energized to run the rear curtain of the shutter. This completes the film exposure operation.

[Step 118] Switch SCN2 interlocked with the completion of running the rear curtain
Determine whether is on or off. Step 118 if off
Stay at and wait until the switch turns on. When it is on, it means that the running of the rear curtain is completed, and therefore the process branches to step 119.

[Step 119] Check flag E, which is a flag that stores the high and low voltage states, and if the voltage is high, step 119
To 123, and if the voltage is a little low, branch to step 123.

[Step 120] Perform the voltage check again. This voltage check has the same meaning as the voltage check at step 100, so that when the voltage is high (eg Vo4V).
To step 121, and to a step 122 when the voltage is low (eg, Vo <4 volts). As described above, the voltage check is applied to the front curtain coil MG31 and the rear curtain coil MG32 at the same time.
Energize for 10 milliseconds and check the voltage during energization.

[Step 121] Flag E indicates that the voltage is high.
To 1.

[Step 122] The flag E is set to 0 to indicate that the voltage is slightly low.

[Step 123] The forward rotation of the first motor M1 is started in order to lower the mirror and charge the shutter.

[Step 124] The timer # 2, which is a timer counting the energization time of the first motor M1, is started.

[Step 125] Wait 15 milliseconds until the rush current at the start of energization of the first motor M1 subsides.

[Step 126] Check flag E, which is a flag that stores the high and low voltage states, and if the voltage is high, step 126
It branches to 128, and to 127 if the voltage is a little low.

[Step 127] When the voltage is a little low, wait another 15 milliseconds for recovery of the rush current.

[Step 128] Instruct the microcomputer MC3 on the lens side to return the diaphragm blade 530 of the lens to the open position.

[Step 129] Communicates with the lens microcomputer MC3 to check whether the aperture has been returned to the open position, and the aperture blade 530
If is open, the process returns to step 130, and if the aperture is not open, the process returns to step 129 and waits until the aperture is opened.

[Step 130] Second to wind up one frame
Energize the motor M2 in the forward direction.

[Step 131] The timer # 1 counting the energization time of the second motor M2 is started.

[Step 132] to [Step 135] The discrimination flags used in the following processing are cleared to set A = 0, B = 0, C = 0, F = 0.

[Step 136] Check the input status of the input port P11. If the input state is on, it means that the mirror down and the shutter charge have ended, so go to step 137.
If it is off, the mirror down is incomplete, so branch to step 142.

[Step 137] Since the mirror down (shatter charge) is completed, the first motor M1 is stopped.

[Step 138] Whether only the first motor M1 for driving the mirror (shutter charge) is operating, or the second motor for hoisting
Check the flag B that stores whether or not the motor M2 is also operating at the same time. If flag B is 0, step 15
If the flag B is 1, the process branches to step 139.

[Step 139] The state flag B is set to 0.

[Step 140] The fact that the state flag B is 1 means that the second motor M2 for hoisting is temporarily stopped. At step 140, the energization of the second motor M2 for winding is restarted.

[Step 141] Restart the timer # 1 counting the energization time of the second motor M2 for winding. Then branch to step 151.

[Step 142] Check the timer # 2 for counting the energization time of the first motor M1 for driving the mirror, and if 1 second has elapsed, go to step 143. If 1 second has elapsed Branches to 145.

[Step 143] The first motor M1 for driving the mirror remains mirror down or cannot complete the shutter charge.
Since the second time has elapsed, the first motor M1 for winding is once stopped, and only the first motor M1 is operated independently, and only the mirror down and the shutter charge are performed first. At this time, if the second motor M2 for hoisting is already stopped, the process branches to step 146.

[Step 144] Check the flag E that stores the high or low state of the battery voltage BAT, and branch to 146 if the voltage is high.

[Step 145] Status flag B for determining status flag B
Is 1, that is, when the first motor M1 for driving the mirror is operating, the process returns to step 136 and waits until the mirror down is completed. When the status flag B is 0, that is, when the second motor M2 for winding is also operating at the same time, the step
Branch to 204.

[Step 146] The energization of the second motor M2 for winding and the first motor M1 for driving the mirror is stopped.

[Step 147] Since the charge has stopped halfway to the DR of the display drive IC, display data is sent to display an accident.

[Step 148] Since the second motor M2 for winding and the first motor M1 for driving the mirror could not be simultaneously driven, the second motor M2 for winding is once stopped.

[Step 149] The timer # 2 counting the energization time of the first motor M1 for driving the mirror is restarted.

[Step 150] State Fugler B is set to 1, and since the motors M1 and M2 cannot be energized simultaneously, the second motor for hoisting
Remember that the power to M2 was stopped. Then step 13
Returning to step 6, continue to detect the completion of mirror down (shattering charge).

[Step 204] For mirror drive (for shutter charge)
Check whether the first motor M1 is operating, and branch to step 151 in the stopped state and to step 154 in the operating state. This step 204 further rotates the first motor M1 for driving the mirror one revolution when an abnormality occurs in the abnormal state avoidance sequence in the subsequent steps 205 to 208, and as a result, the operation of the second motor M2 for hoisting ends. This is a step inserted because the first motor M1 for driving the mirror (shutter charge) may come later in some cases.

[Step 151] Check whether the second motor M2 for winding is in operation or stopped, and if it is in operation, step 154
When it is stopped, it branches to step 152.

[Step 152] While the input signal of the input port P9 winds one frame, the memory F, which stores how many times it is switched on and off, is checked. If only 4 times or less are switched during the winding of one frame, the film can be wound immediately after (or at the same time) the second motor M2 was stopped by the signal of completion of winding one frame (input port P10) during the previous winding. Thrust, and the driving force of the second motor M2 is lost, the sprocket 402
Is judged to have returned a little in the rewinding direction, and jump to the rewind motor (step 64) described above. On the other hand, when the ON / OFF switching signal is input more than four times, the process branches to step 205.

The meaning of this step 152 will be described more specifically.

The length of the film 52 varies depending on each maker and each item.
It is well known that one can take a picture. This also occurs due to variations in the amount of idle feed during autoloading. It is also known that the base of the film 52 itself is a synthetic resin sheet, so that the film 52 extends a little when pulled. Therefore, even if one frame of the film 52 can be wound around the last frame of the film 52 that can be photographed,
Actually, film 52 is already in front of the completion of winding one frame.
The strut (the film 52 wound around the patrone shaft 51 of the film patrone 50 is all fed in the direction of the spool 401, and even if the film 52 is further wound by the rotation of the spool 401, the patrone 50 of the film 52 is wound. There is a case where the film 52 cannot be pulled out from the film, and one frame can be wound up because the film 52 is extended. In such a case, when the winding driving force of the spool 401 is lost by stopping the second motor M2, the film 5
2 contracts due to the restoring force from itself, and the sprocket 402 is slightly rotated in the rewinding direction due to the engagement driven with the film perforation 54. Therefore, when the winding for the next frame is carried out next time, the one-frame winding completion signal is input to the input port P10 before the winding for one frame is completed, and the winding for one frame is actually proper. However, the output signal may be a signal indicating that one frame has been wound. Then, with the conventional sequence, shooting is OK even in such a case,
There has been a problem that the exposure for the next frame is performed and a double exposure is performed which is not intended by the photographer, and the film bulge (end of film) cannot be detected no matter how many times the film is wound. The step 152 of the present embodiment is a step inserted to solve the above-mentioned conventional problem. Even when a one-frame winding completion signal is generated during winding and the stop control of the second motor M2 is performed, input is performed. A predetermined number of ON / OFF switching signals to the port P9 (in the embodiment, the predetermined number is set to 4 times,
Theoretically output when winding one frame in a normal condition.
If it does not reach a number smaller than the number of off switching signals), the film 52 has already determined that it is in the tensioned state and the automatic rewind mode (step 64) for rewinding is used to jump to the step. By doing so, the conventional problem was solved.

Next, a case will be described in which the overrun amount of the first motor M1 at the completion of the shutter charge (mirror down) in steps 205 to 208 becomes a predetermined amount or more.

[Step 205] Check the input port P12. As described in detail in the explanation of the empty charge sequence (Fig. 13C), if the overrun amount at the completion of the shutter charge (mirror down) is within the predetermined range, the input port P12 is turned off and the process goes to step 153. Although it branches to a normal sequence, when the overrun amount exceeds the set range, the input port P12 turns on and branches to step 206 as the abnormal state avoidance sequence.

Here, the problem when the overrun amount exceeds the set range will be described. That is, the mirror drive gear 120 may further rotate clockwise from the state of FIG. 3A. Worst case mirror drive cam 121
That the movable cam 70 rotates in the up direction (exposure retract position direction) due to the sliding contact between the climbing cam surface 121a and the one end 131 of the mirror drive lever 130, and a proper finder observation state cannot be obtained. Also, there arises a problem that the subject light cannot be properly incident on the AF light receiving element (not shown). Naturally, the shutter charge gear 140 may further rotate counterclockwise, and in the worst case, the flat cam surface 141b of the shutter charge cam 141 and the roller 151 of the shutter charge lever 150 may be combined. The sliding contact is disengaged, and the shaft 151 corresponds to the downward cam surface 141c, and the shutter charge lever 15
0 rotates in the charge release direction (clockwise),
This causes a problem that the shock lever performance of the shutter unit 300 is deteriorated by the tension of the charger lever 302 of the shutter unit 300 being released before traveling of the shutter.

[Step 206] The first motor M1 is again energized in the forward rotation direction. As a result, the mirror drive gear 120 again rotates in the clockwise direction, and the movable mirror 70 is once mirror-up by the sliding of the mirror drive cam 121 and the mirror drive lever 130, and then continuously mirrored down again.
Further, the shutter charge gear 140 is also rotated counterclockwise again, and the shutter charge lever 150 is rotated to release the charge and rotate the charge. However, even if the shutter charge lever 150 rotates again in this state, the shutter unit 300 is not adversely affected.

[Step 207] When the first motor M1 is restarted, the brush 122 shown in FIG.
Wait for 15 milliseconds as the time to move out (non-sliding).

[Step 208] Restart the timer # 2 counting the energization time of the first motor M1 for driving the mirror (shutter charge).

Then, the process returns to step 136 again, and the operations following step 136 are performed again.

[Step 153] Display data indicating that one frame has been wound and that the normal operation of the shutter charge has been completed is sent to the DR of the display drive IC, and the process is branched to step 22 to end the processing.

[Step 154] The flag A which is a flag for storing the previous state of the input port P9 is checked. When the flag A is 0, the previous state of the input port P9 is stored as the switch-on state, and when the flag A is 1, the previous state of the input port P9 is stored as the switch-off state. Input port P9
The signal to be input to is a signal interlocked with the sprocket 402 as described above, and a signal that is repeatedly turned on / off a plurality of times (for example, 12 times) is input while winding one frame by the film,
Microcomputer MC if ON / OFF signal is input repeatedly
2 determines that the sprocket 402 is rotating, and if the on / off repeating signal is stopped, the microcomputer MC2 determines that the sprocket 402 is stopped. Step 1
At 54, if flag A is 1, go to step 157, flag A
When is 0, the process branches to step 155. Immediately after the feeding sequence operation, since the flag A is set to 0 in step 132, the process branches to step 155.

[Step 155] The previous state and the current state of the input port P9 are compared. If it has changed, the process branches to step 156, and if it has not changed, it branches to step 161.

[Step 156] Since the input state of the input port P9 has changed, the flag A is newly set to 1.

[Step 157] Similar to step 156, the previous state and the present state of the input port P9 are compared, and if there is a change, the process branches to step 158, and if not, the process branches to step 161.

[Step 158] Since the input state of the input port P9 has changed, the fugula A is newly set to zero.

[Step 159] The timer # 1 for counting the energization time of the second motor M2 is restarted from the beginning.

[Step 161] Check the timer counting the energization time of the second motor M2 because there was no change in the input port P9. If there is no change in the input port for 350 milliseconds, the sprocket 402 stops. It is judged that there is a step 167
Go to step 162 if 350ms has not passed yet.

[Step 160] Since the input state of the input port P9 has changed, the memory F, which stores the number of times the on / off switching signal of the input port P9 is switched, is incremented.

[Step 162] The flag C, which is a flag for storing the previous state of the input port P10, is checked. When the flag C is 0, the state of the previous input port P10 is stored as the switch-on state, and when the flag C is 1, the previous input port P10 is stored.
The state of is stored as the switch-off state. The signal input to the input port P10 is a signal interlocked with the sprocket 402, and the switch is turned on when the winding corresponding to one frame of the film is completed. Also, when the winding of the next film is started, it is turned off immediately, and it is turned on when the winding is completed. Therefore, the microcomputer MC2 can control the winding of one film frame by detecting this signal. Flag C in step 162
When the flag C is 1, the process branches to step 165, and when the flag C is 0, the process branches to step 163. Immediately after the winding operation,
Since the flag C has been set to 0 in step 1, the process branches to step 163.

[Step 163] The previous state of the input port P10 is compared with the present state. If it has changed, the process returns to step 164, and if it has not changed, the process returns to step 136, and the mirror down and winding completion detection are continuously performed.

[Step 164] Since the input state of the input port P10 has changed, the flag C is newly set to 1. After that, the process returns to step 136, and the mirror down (shutter charge completion) and winding completion detection are continuously performed.

[Step 165] The previous state of the input port P10 is compared with the present state. If it has changed, the process returns to step 166, and if it has not changed, the process returns to step 136.

[Step 166] Since the signal from the input port P10 is switched from OFF to ON, the winding of one frame is completed, the second motor M2 is deenergized, and the film counter is incremented.

[Step 167] Branches to step 168 when the first motor M1 is energized, and branches to step 169 when it is stopped.

[Step 168] Check flag E, which is a flag that stores the high and low voltage, and when the voltage is high, step 16
If the voltage is a little low, the process returns to step 148 to stop simultaneous energization of the motors M1 and M2.

[Step 169] The energization of the motors M1 and M2 is stopped, and the rewinding sequence is started.

[Step 175] Check the flag Z of the E ² PROM to determine whether to perform automatic rewinding or prohibit. Flag Z is 1
Then, in order to perform automatic rewinding, the process branches to the above-described rewinding sequence. On the other hand, if the flag Z is 0, the automatic rewinding is prohibited, so the process branches to step 22.

The above is the flow of the sequence for simultaneously performing the release, the film feeding, the shutter charge, and the mirror driving.

Next, the flow chart of the lens microcomputer MC3 will be described.

FIG. 14 is a flow chart of the microcomputer MC3 on the lens side.

[Step 170] Communicate with the microcomputer MC2 on the camera side.

[Step 171] It is determined whether or not the result of communication with the camera side microcomputer MC2 is an aperture drive command from the camera side. If it is determined to be an aperture drive command, go to step 172, otherwise go to step 173. Branch off.

[Step 172] The third motor M3 for driving the diaphragm blades is energized in the forward direction (counterclockwise direction in FIG. 10) to narrow the diaphragm down to a predetermined position. Since the aperture value is sent from the camera side at the time of communication, it suffices to energize the device only for a time period corresponding to the aperture value. Alternatively, a stepping motor or the like may be used as the third motor M3 to output a predetermined number of drive pulses.

[Step 173] It is determined whether or not the result of communication with the microcomputer on the camera side is an instruction to open the aperture from the camera side. If it is determined to be an instruction to open the aperture, return to step 174, otherwise return to step 170. , Wait for the next command from camera side microcomputer MC2.

[Step 174] The third motor M3 for driving the diaphragm blades is energized in the reverse direction (clockwise in FIG. 10) for a predetermined time to open the diaphragm. After that, the process returns to step 170 and waits for a command from the camera side microcomputer MC2.

The above is the flow chart of the lens microcomputer MC3.

Here, a schematic sequence in the case where the camera sequence in this embodiment operates normally will be described.

A new film cartridge 50 is loaded into the camera and the back lid 430 is closed to start auto loading. That is, first, the second motor M2 for winding is rotated forward by about three frames, and in this state, both the spool 401 and the sprocket 402 are rotated by using the second motor M2 as a drive source, and the film leader portion 56 is spooled. Send to 401 and wind. After that, the second motor M2 is once rotated in the reverse direction to switch the clutch, and the sprocket 402 is set to the free state to switch to the spool drive. And again about 1
The second motor M2 is normally rotated by the number of frames, and a check is made as to whether or not auto loading is successful. That is,
If the sprocket 402 is rotated by the film 52 by rotating the spool 401 in the sprocket-free state, the leader portion 56 of the film 52 is rotated by the spool 40.
It can be confirmed that it is wrapped around 1, and it can be determined that the auto loading has succeeded. Up to this point, the film idling operation for auto loading is completed, the rotation of the second motor M2 for winding is stopped, and the state is ready for the next release operation.

By operating the release button 12, the first motor M1 for driving the mirror and the shutter charge is rotated in the normal direction by a predetermined amount to move the movable mirror 70 to the mirror up (exposure retract position), and the shutter unit 300 is released from the charge. The charge lever 302 in the unit, which has been exerting the tightening function for preventing erroneous travel of the shutter, is moved to release the tightening. At the same time, the third motor M3 for driving the diaphragm is rotated in the normal direction by a predetermined amount to perform the narrowing operation up to the set value. Then, the coil 383 of the electromagnet for the front curtain control is energized to drive the front blade group 352 to start the exposure, and after a preset time, the coil 389 of the electromagnet for the rear curtain control is energized and the rear blade group 351 is energized.
To complete the exposure.

After it is confirmed that the exposure has been completed, the first motor M1 is again rotated by a predetermined amount in the forward direction in the same direction as the mirror up, the movable mirror 70 is moved down the mirror (at the finder observation position), and the shutter unit 300 is driven in the shutter charge. At the same time, the above-mentioned charge lever 302 for preventing accidental travel of the shutter is held at the tightened position. At the same time, the second motor M2 for winding is rotated forward by one frame. Further, the third motor M3 for driving the diaphragm is reversely rotated to return the diaphragm to the open state. Wait for the next release operation in this state.

Then, when the exposure operation based on the release operation described above is repeated and the filming of all the frames of the film is completed, the film 52 projects when the film 52 is wound, and this state is sprocketed.
When it is detected by the rotation stop of the rotary substrate 420 that rotates in conjunction with 402, first the first motor M1 for driving the mirror and for the shutter charge is rotated in the forward direction until the mirror is down and the shutter charge is completed. Then, the second motor M2 for hoisting is temporarily stopped and then reversely rotated to rotate the second motor M2.
Turn off the transmission system between the motor M2 and spool 401, and
01 is free to reduce the rewinding load. Then, in the future, the first motor M1 used for driving the mirror and for the shutter charge will be reversed in the future, and the first motor will be used first.
The transmission system of M1 is switched from the conventional mirror drive and shutter charge transmission system to the rewinding transmission system, and subsequently, the rewinding gear 201 of the rewinding transmission system is rotated in the rewinding direction. When the rewinding is completed, all the film 52 is returned to the inside of the film cartridge 50. Only the film leader portion 56 is slightly patrone.
When it is about 50, the driven rotation of the sprocket 402 by the film 52 is stopped, and based on this detection, all the operations including the first motor M1 are stopped, and the camera sequence ends.

Next, another embodiment of the present invention will be described with reference to FIGS. 15 and 16.

FIG. 15 is a film winding drive mechanism of FIG. 8 of the above embodiment.
Another rotating board 420 'is used instead of the rotating board 420 of 400. The modification is to remove a part of the second pattern portion 420b of the rotating board 420' and wind the whole film frame from another viewpoint. The completion detection area 450 is formed. That is, in this area 450, when the sprocket 402 is driven to rotate in the film winding direction (clockwise), the sliding brush 423 (this output is input to the input port P9 in FIG. 11) detects the completion of winding one frame. Is on the locus along which the sliding brush 424 slides immediately before the sliding contact with the third pattern 420c. As a result, the sprocket 402 is rotated by the rotation of the spool 401 in the winding direction (clockwise direction), and the sliding brush 423 is brought into sliding contact with the third pattern portion 420c to make one frame. When the winding completion signal is generated (input to the input port P10 in FIG. 11) and the second motor M2 is stopped and controlled, the state of the winding is the winding completion state of all the frames of the film 52 (protruding state). ), The film 52
When the sprocket 402 is slightly driven in the rewinding direction (counterclockwise) by itself shrinking, the sliding brush 424
The completion detection area 450 is calculated to match the area in which the sliding contact is made.

Next, FIG. 16 will be described. FIG. 16 is a flowchart in which a part of FIG. 13E showing the release sequence in the above-mentioned embodiment is modified, and the modification is that the step 135 in the above-mentioned embodiment is deleted and the step 300 is inserted instead. The reason is that step 152 is deleted and step 301 is inserted instead. Everything else is common. Explaining concretely inserted step, step 300
Clears a new discrimination flag G and sets G = 0. That is, the discrimination flag G is the input signal (1
Inputting multiple on / off switching signals when winding the frame)
Is for storing whether or not the ON / OFF switching signal is output even once, G = 1 when the ON / OFF switching signal is input to the input port 9 even once.
If the ON / OFF switching signal is not input even once, G =
It is held as 0.

Step 301 checks the memory G (discrimination flag G). Here, in the state of G = 0, that is, while winding one frame, the ON / OFF switching signal is not inputted to the input port P9 even once, and the sliding brush 42 shown in FIG.
4 is slightly rotated from the state where the film all-frame winding completion detection area 450 is in sliding contact with the sliding brush 423 and the third pattern 420.
It comes into sliding contact with c and outputs a one-frame winding completion signal to input port P10. This is because the film thrusts immediately (or at the same time or just before) when the second motor M2 was stopped by the signal (input port P10) to complete the winding of one frame during the previous winding, and the driving force of the second motor M2 was increased. It means that the sprocket 402 has returned a little in the rewinding direction (due to the shrinkage of the film 52) at the time when the film disappears. At this time, jump to rewind mode (step 64).

On the other hand, when G = 1, it is determined that one frame has been properly wound, and the process branches to step 205.

Next, another embodiment of the present invention will be described with reference to FIG.

FIG. 17 is a flow chart in which a part of FIG. 13E showing the release sequence in the embodiment of FIGS. 1 to 14 is modified, and the modified point is step 135 in the embodiment.
, And insert steps 310 and 311 instead, and delete step 152 and replace steps 320-322 instead.
Has been inserted. Everything else is common. Explaining the step inserted specifically, step 31
0 and 311 are steps for starting timers # 4 and # 5 for detecting a peculiar film thrust state described later,
The timer # 4 here is a timer in which the time of the power supply battery BAT is considerably high (flag E = 1), for example, 400 milliseconds is set, while the timer # 5 is in a slightly low voltage state. This is a timer in which a timer time at (flag E = 0), for example, 500 milliseconds is set.

Step 320 checks what the current voltage value of the power supply battery BAT is. If E = 1, go to step 321.
If E = 0, the process branches to step 322.

Step 321 and step 322 are steps for discriminating a peculiar film thrusting state. Since step 321 is the flag E = 1 and the voltage of the power supply battery BAT is considerably high, the second motor M2 rotates at high speed. Expected to do,
Here, the timer # 4, which counts the energization time of the second motor M2, is checked, and when there is no change in the input port P10 for 400 milliseconds, it is determined that normal winding is being performed, and step 205 is performed. When there is a branch and there is a change in the input port P10 (input of one frame winding completion signal) within 400 milliseconds, it is detected that a peculiar film thrust has occurred and it is jumped to the auto rewind (step 64). To do.

Since the flag E = 0 in step 322, the power supply battery BAT
The second motor M2 is predicted to rotate at a slightly lower speed because the voltage of the second motor M2 is slightly low, and the timer # 5 that counts the energization time of the second motor M2 is checked here.
If there is no change in the input port P10 for a millisecond, it is judged that the winding is normal, and the process branches to step 205, and there is a change in the input port P10 (input of one frame winding completion signal) within 500 milliseconds. When it does, it detects that a peculiar film thrust has occurred and jumps to the auto rewind (step 64).

Explaining the above-mentioned peculiar film bulging, this is just after (or at the same time as immediately before) the second motor M2 was stopped by the one-frame winding completion signal (input port P10) at the previous winding. Means that the sprocket 402 has slightly returned in the rewinding direction (due to the shrinkage of the film 52) when the drive force of the second motor M2 is lost. Therefore, in this state, even when the next frame is wound, one frame winding completion signal (input port P1
Even if 0) occurs, the original proper one frame will not be wound up, so it is better to judge it as a film bulge and perform auto rewind processing. If you do not do it, the same frame will be repeated many times. Exposure will occur.

Next, the characteristic operation of the embodiment corresponding to the present invention will be outlined with reference to FIG.

The rotation of the second motor M2 is transmitted to the film winding drive mechanism 400 to wind up the film 52. This second motor M2
Is controlled by the motor control circuit 620, and the traveling of the shutter unit is actually completed (the traveling of the rear curtain of the shutter is completed).
The second motor M2 is driven in the winding direction by the input of the signal. The one frame detection means 600 detects the rotation state of the sprocket 402 of the film winding drive mechanism 400, and the sprocket 4
In the state in which 02 is driven by one film by the film 52, a one-frame winding completion signal is output to the motor control circuit 620,
The motor control circuit 620 receives the signal and outputs the second motor M2.
Stop control.

The all-frame winding completion detecting means 610 also has a predetermined on / off switching signal (configured so that the on / off switching signal is generated a plurality of times during winding of one frame) by the sprocket 402 by the film 52. If it does not occur during the time period, a film projecting (film all frame winding completion) signal is output to the motor control circuit 620 and other rewinding means. The motor control circuit 620 receives the signal and controls the stop of the second motor M2.

Here, the all-frame winding completion detecting means 610 can also detect a peculiar film bulge. In the embodiment, three types of methods for detecting the peculiar film bulge have been described, and therefore the respective types will be described separately.

[First Method] This corresponds to the embodiment shown in FIGS. 1 to 14 and counts the number of ON / OFF switching signals representing the above-mentioned film movement, and the number is smaller than a predetermined number. However, when the one-frame winding completion signal of the film is output, it is judged that the film bulging has already occurred near the time when the winding of the previous frame is completed, and the film urging signal is output.

[Second Method] This corresponds to the embodiment shown in FIGS. 15 and 16, and the ON / OFF switching signal representing the above-mentioned film movement is 1
When the film winding completion signal is output even though the number of times is not generated, it is determined that the film has already been bulged at the time of winding the previous frame, and the film bulging signal is output. .

[Third method] This corresponds to the embodiment shown in FIG. 17, and from the time when the second motor M2 is started to be driven for film winding,
When the one-frame winding completion signal of the film is output within a predetermined time, it is determined that the film has already been bulged in this state at the time of winding the previous frame, and the film bulging signal is output.

(Effects of the Invention) As described above, according to the present invention, the indexing of the winding of one film of the film is detected by the signal indicating the completion of the winding of one film of the film. It is possible to provide an electrically driven camera that prevents unauthorized multiple exposure by detecting that the film has been bulged (a state in which all frames have been wound up) near time.

[Brief description of drawings]

FIG. 1 is an explanatory view of the configuration and arrangement of an electric drive camera as an embodiment of the present invention. FIG. 2 is an exploded perspective view of a main part of each configuration shown in FIG. 3 (a) and 3 (b) are operation explanatory views of the mirror box drive mechanism and the film rewinding drive mechanism shown in FIG. FIGS. 4 (a) and 4 (b) are operation explanatory views of only the phase detection configuration shown in FIG. 5 (a) and 5 (b) are operation explanatory views of the transmission switching configuration in FIG. FIGS. 6 (a) and 6 (b) are operation explanatory views showing the essential configuration of the shutter unit. FIG. 7 is a perspective view showing a traveling control mechanism having the shutter configuration shown in FIG. FIG. 8 is a perspective view showing the structure of the film winding mechanism shown in FIG. 9 (a) to 9 (e) are operation explanatory views showing the operation of the film winding mechanism of FIG. FIG. 10 is a perspective view showing a diaphragm driving structure in the taking lens. FIG. 11 is a circuit diagram for controlling the operation of each mechanism. FIG. 12 is a flow chart for explaining the operation of the circuit of FIG. 13A to 13E are flow charts for explaining the operation of the circuit of FIG. FIG. 14 is a flow chart for explaining the operation of the circuit of FIG. FIG. 15 is a perspective view of an essential part of a film winding drive mechanism showing another embodiment of the present invention. FIG. 16 is also a flow chart showing another embodiment, FIG. 17 is a flow chart showing still another embodiment of the present invention, and FIG. 18 is for explaining the characteristic operation of the embodiment corresponding to the present invention. Block diagram. 40 ... Camera body, 60 ... Mirror box, 70 ... Movable mirror, 100 ... Mirror box drive mechanism, 200 ... Film rewind drive mechanism, 300 ... Shutter unit, 400 ...
… Film winding drive mechanism, M1 …… First motor, M2…
… Second motor, M3 …… Third motor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-57-66432 (JP, A) JP-A-57-141630 (JP, A) JP-A-58-83829 (JP, A) JP-A-59- 97125 (JP, A) Actually developed Sho 56-66929 (JP, U)

Claims (3)

[Claims] 1. A film winding drive mechanism for driving a film in a winding direction, a motor as a drive source of the film winding drive mechanism, and a detection means for detecting completion of winding of all the film frames and generating a winding completion signal. The detection means electrically detects, as a signal output, the corresponding position displacement between the rotating member that rotates following the winding movement of the film and the fixed fixing member, and winds the film by one frame. In addition to providing a detection configuration for obtaining a first signal output by completing the operation and a second signal output a plurality of times while the film is wound and moved by one frame,
A detection circuit for detecting how many times the second signal is generated in the signal generation interval and generating the winding completion signal when the second signal is smaller than a predetermined number. An electric drive camera. 2. A film winding drive mechanism for driving the film in a winding direction, a motor as a drive source of the film winding drive mechanism, and a detection means for detecting completion of winding of all the film frames and generating a winding completion signal. The detection means electrically detects, as a signal output, the corresponding position displacement between the rotating member that rotates following the winding movement of the film and the fixed fixing member, and winds the film by one frame. The first signal that is output by completing it and the second signal that is output immediately before the film is wound up and moved by one frame
And a third signal output during the film winding process are provided, and the third signal is not generated at the generation interval of the first signal, and the second signal is generated. An electric drive camera, wherein a detection circuit for generating the winding completion signal is provided when only the above occurs. 3. A film winding drive mechanism for driving the film in the winding direction, a motor as a drive source of the film winding drive mechanism, and a detection means for detecting completion of winding of all the film frames and generating a winding completion signal. The detection means electrically detects, as a signal output, the corresponding position displacement between the rotating member that rotates following the winding movement of the film and the fixed fixing member, and winds the film by one frame. A detection configuration for obtaining a first signal to be output upon completion is provided, and the time from the start of winding to the generation of the first signal is detected, and when the time is shorter than a predetermined time, An electric drive camera, characterized in that a detection circuit for generating the winding completion signal is provided.