JPS63169628A - Motor-driven camera - Google Patents

Abstract

PURPOSE:To securely detect the completion of the winding of one frame and all frames by providing a rotary substrate where a radial pattern part is provided on the reverse surface of one end part of a sprocket and bringing slide brushes in contact with the patterns and generating electric signals when a film wound around a spool is taken up around the sprocket. CONSTITUTION:The film wound around the spool 501 is taken up around the sprocket 402 and the rotary substrate 420 provided with plural radial patterns 420a-420c, etc., are provided on the reverse surface of one side of the sprocket 402 is provided. The slide brushes 422-424 are brought into contact with them, and their contact points are utilized to lead electric signals out according to the rotation of the sprocket 402. Then the spool 501 and sprocket are both driven and rotated up to the middle of take-up operation and it is decided whether one frame or all frames are taken up from the obtained electric signals; and the sprocket is freed when the completion is judged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrically driven camera in which film winding is performed by a motor.

(Prior art) Regarding the film winding and feeding of a camera, conventionally, each time the film is fed by -1, a movable member called the winding IF pawl and 11. There is a well-known technique for forcibly stopping the burning operation by dropping the film into the frame, thereby positioning the film frame by frame.

However, recently it has become difficult to use this anti-rolling claw (
Various cameras have been proposed that control the screen interval for each frame of film. This detects a switch using a rotary plate that is linked to the movement of a sprocket that follows the film winding movement, and when a signal indicating the completion of film winding is detected from the rotary plate switch, the film feed is stopped. By electrically shorting both ends of the motor and forcibly stopping the motor from rotating due to inertia, controllability can be improved, without the need for the conventionally required winding pawl!
This makes it possible to accurately determine the screen spacing for each frame.

In such cameras, it is common to know that all frames of film have been photographed when the sprocket does not rotate at all even when the motor is moved to wind the film.

Methods for detecting that the sprocket does not rotate include a method of recognizing that the above-mentioned l-equal winding end signal has not been output even after sufficient time has elapsed for winding, or a method other than the winding end signal. A method is known which is carried out using means for independently detecting the rotational movement of the sprocket.

Particularly in the latter case, when the sprocket is operating from the rotary plate that interlocks with the sprocket, a repeated on/off signal is output multiple times during the winding of one frame, and this on/off signal is output within a predetermined time. A commonly known method is to recognize that it does not occur.

or,! A known method for determining the screen interval for each frame is to count the above-mentioned on/off signals and count the number divided by l, and then detect that l frames have been fed.
There was a drawback that if a counting error occurred due to chattering on the signal generation side, the frame spacing would be slightly off.

therefore,! To determine the screen interval for each frame,
It is more accurate to use the signal that switches once for each frame.

[Problem that the invention is trying to solve] However,
In the conventional example described above, a malfunction may occur when the final frame of the film is wound.

In other words, if the film happens to be tensed and fully stretched at the end of winding equal to 1, the film may shrink and cause the sprocket to move slightly when the motor is turned off because the load is removed. In this case, since the sprocket moves in the opposite direction to the film winding direction, it will return from the position where the one frame winding completion signal of the film is issued, and if the winding operation is performed after the next shooting, the actual A winding completion signal is issued even though the film has not been completely wound, and the feeding of the film is stopped. Therefore, if the next photographing operation is performed as it is, the film will be double exposed.

In addition, there is a possibility that the above-mentioned phenomenon will continue to occur, and in such a case, triple damage will occur.

There is also a risk that the same location (frame) may be exposed four times.

The above on/off signal that detects the rotation of the sprocket is 1
A switch that outputs multiple times at the piece is effective for detecting sprocket operation stoppage when the winding completion signal does not arrive, but since the winding completion signal is inputted first as an erroneous signal, the motor cannot be activated 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-mentioned conventional problems, and even when the winding completion state of all the pieces approximately coincides with the winding completion position of one frame, To provide an electrically driven camera that can reliably detect the completion of winding of all frames.

〔Example〕

Next, the present invention will be explained in detail based on the drawings.

Note that this embodiment shows a case where the present invention is applied to a single-lens reflex camera.

FIG. 1 shows an explanation of the arrangement of each unit in a single-lens reflex camera, and 10 indicates a camera body.

The camera body 10 is equipped with a photographic lens 20, which can be freely rotated as described above. Reference numeral 12 indicates a release button, 14 indicates a rewind button, and 30 indicates a battery located at the bottom of the camera body. Note that the battery 50 is, of course,
In order to easily take out the battery when replacing it, the camera body 1O has a structure that allows the camera body 10 to be easily taken out from the battery storage chamber by removing a member corresponding to the battery cover. Ml is a first motor, and this first motor Ml serves as a driving source for charging the front plate system, driving the mirror, and driving the film rewinding system. Reference numeral 100 indicates a mirror box drive mechanism as a front plate system, and reference numeral 200 indicates a film rewinding mechanism. 400 is a film winding drive mechanism, and M2 is a second motor, which serves as a drive source for the film winding drive system 400.

FIG. 2 shows an exploded perspective view of each component disassembled into units.

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

First, the outline of each unit will be explained based on FIG. 2.

In the figure, 40 is a camera body, and although detailed illustration is omitted, the entire body is made of plastic mold. However, parts such as the area of the aperture 41 that particularly require precision and strength are formed by insert molding of metal. 4
2a to 42d indicate mounting holes for fixing a mirror box 60, which will be described later, with screws, 43 indicates a spool chamber, and 44 indicates a cartridge chamber. Reference numeral 50 indicates a film cartridge in which a film 52 is wound, 54 indicates a film perforation, and 56 indicates a portion of a film leader. Reference numeral 60 denotes a mirror box, in which mounting holes 61a to 61d are formed at positions corresponding to the respective mounting holes 42a to 42d of the camera body 40, and the numbered holes 42a
The mirror box 60 is firmly fixed to the camera body 40 by screwing together the parts 42d and 61a to 61d. Reference numeral 70 denotes a movable mirror, which rotates between the viewfinder observation position (mirror down state in FIGS. 2 and 3(a)) and reflects the subject light that has passed through the photographic lens 20 to the viewfinder optical system (not shown). Exposure retreat position (third
It is rotatably supported so that two states can be obtained: the mirror-up state shown in Figure (b). A camera side mount 80 is screwed to the mirror hook 60, and has bayonet claws 81a to 81c for bayonet connection with a lens side mount (not shown) of the photographic lens 20.

+00 indicates the entire mirror box drive mechanism,
This mechanism is entirely arranged in the mirror box 60. Reference numeral 200 indicates the entire film rewind drive mechanism, a part of which is disposed in the mirror box 60, and the other part is disposed in the camera body 40.
It is placed on the side. Ml is 100.200 for both the above mechanisms
The mirror box 6
Fixed to 0.

Reference numeral 300 indicates the entire shutter unit, and a shutter base plate 301 has mounting holes 301a and 301b for mounting to the mirror box 60.

Therefore, this shutter unit 300 is firmly fixed to the mirror box 60 by aligning the mounting holes 301a and 301b with the corresponding mounting holes 62a and 62b of the mirror box 60 and screwing them together. - 100 indicates the entire film winding drive mechanism, and although it is not shown in detail in FIG. 2, the entire film winding drive mechanism is made into a unit and is assembled in the spool chamber 43 of the camera body 40.

Next, the configuration of the mirror hook drive mechanism 100 will be described in detail using FIG. 2 and FIGS. 3 to 5 described above.

101 is a main plate fixed to one side (the right side in FIG. 2) of the mirror box 60;
1 rotatably supports all of the rotating wheels 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;
04 is a sun gear that meshes with the reduction gear 103, and 105 is a planetary gear that meshes with the sun gear 104. This sun gear 1
04 and the planetary gear 105 are connected by a planetary lever 112, and the IIf leg gear 5 is configured to perform planetary motion according to the rotational direction of the sun gear 104. Specifically, the planetary gear 105 has the planetary shaft 1 as the central shaft.
10 and is frictionally coupled by a coil spring 111. Further, a receiver 113 that is loosely fitted into a boss 114 of the main plate 101 , which is the center axis of the sun gear 104 , and the planetary shaft 110 are connected by the planetary lever 112 . Therefore, as understood from the operation diagram in FIG. 5(a), when the sun gear 104 rotates counterclockwise, the planetary gear 105 first revolves counterclockwise due to the friction of the coil spring 111, and It moves toward the center of revolution around the boss 114 and meshes with the transmission gear 106. Then, when the planetary gear 105 and the transmission gear 106 mesh, the driving force overcomes the friction of the coil spring 111 (the planetary gear 105 slips and rotates with respect to the planetary shaft 110), and the planetary gear 105 (clockwise rotation ) rotates and transmits the rotation of the first motor Ml to the transmission gear 106.

On the other hand, as can be understood from the operation diagram in FIG. 5(b), when the sun gear 104 rotates clockwise, the planetary gears 105 first revolve in the temporal direction, and then the planetary gears 105 rotate as a rewinding transmission system, which will be described later. The rewinding gear 201 moves around the hebos 114 as the center of revolution,
It meshes with the rewind gear 201.

Then, when the planetary gear +05 and the rewinding gear 201 mesh with each other, the planetary gear 105 rotates and transmits the rotation of the first motor Ml to the rewinding gear 201.

The transmission gear 106, which rotates counterclockwise, is the driving side of the mirror hook drive system. 107 is transmission gear +06
A transmission shaft is fixed to one end thereof, and a worm gear 108 is fixed to the other end. This transmission shaft 107 is connected to the base plate 1 disposed at both thrust direction positions of the worm gear 108.
The movement of the receiver 01 in the thrust direction is restricted by a portion 115.

Reference numeral 120 denotes a mirror drive gear that meshes with the worm gear 108 and rotates clockwise.A mirror drive cam 121 is integrally formed on the front side, and a position detection brush (made of a conductive material) is provided on the back side. ) 122 is fixed.

Note that this mirror drive gear 120 is connected to the boss 1 of the base plate 101.
It is rotatably supported by 16. put it here,
The mirror drive cam 121 has a rising cam surface 12+ for driving a mirror drive lever 130, which will be described later, in a counterclockwise direction.
a, flat cam surface 121b for maintaining the rotational position (mirror up state) of the drive lever 130 and the drive lever 13;
A downward cam surface 121c is formed that allows clockwise rotation of 0.

r: 30 is a mirror drive lever consisting of two levers fixed in an abbreviated shape, and is attached to the boss 117 of the main plate 101.
is rotatably supported by the mirror drive cam +21.
It has the role of a cam follower. That is, this mirror drive lever 130 receives rotational drive in the counterclockwise direction by slidingly contacting the rising cam surface 12+a of the mirror driving cam 121 with one end 131, and by slidingly contacting the flat cam surface 121b. The rotating state in the counterclockwise direction is maintained, and the one end 131 and the downward cam surface 12 are in sliding contact with the downward cam surface 121c (even if they are not actually in sliding contact, the one end 131 and the downward cam surface 12
1c), clockwise rotation (return) is permitted. The other end 132 of this mirror drive lever 130 is controlled according to the rotational position of each cam surface of the mirror drive cam 121 described above, and pushes a mirror pin 74 (described later) to move the movable mirror 70. Mirror up (rotation to exposure retreat position)
In operation, the mirror pin 74 is continued to be pushed to maintain the mirror up state, and the mirror pin 74 is released from the push to allow the mirror to move down (return to the viewfinder observation position).

Reference numeral 140 denotes a charge gear which meshes with the mirror drive gear 120 and rotates counterclockwise, and has a shutter charge cam 141 integrally formed on the front surface thereof.

The shutter charge gear 140 has one-to-one transmission (reduction ratio 1.0) with the mirror drive gear 120, and is rotatably supported by the boss 118 of the base plate 101. Here, the shutter charge cam 141 has a rising cam surface 141a for driving a shutter charge lever 150, which will be described later, counterclockwise, and a rotating position of the shutter charge lever 1500 (charged state).
The flat cam surface 141b and the charge lever 1 for maintaining the
Downward cam surface 141c that allows clockwise rotation of 50
is formed.

Reference numeral 150 denotes a shutter charge lever formed in a substantially square shape, which is rotatably supported by a host 119 on the main plate lot, and has an eye 1F3 as a cam follower of the shutter charge cam 141. That is, this shutter chirp lever 150 has a roller 15 supported at one end.
1 is rotated in the counterclockwise direction by contacting with the ascending cam surface 141a of the shutter charge cam 141, and is rotated in the counterclockwise direction by contacting with the flat cam surface 141b. When the roller 151 reaches the phase of the downward cam surface +41c, clockwise rotation is permitted. The roller 152 supported at the other end of the shutter charge lever 150 is controlled in accordance with the rotational position of each cam surface of the shutter charge cam 141, so that the seesaw lever in the shutter unit 300 (described later) 30
5 to charge the shutter, and continue pushing the seesaw lever 305 to maintain the charging operation (the shutter unit 300 will be described later, but the shack unit 300 in this embodiment performs the charging operation). The continuation can be performed by mechanically holding both the shutter front curtain and the rear shutter curtain in the travel preparation position), and by releasing the push of the seesaw lever 305 and returning the seesaw lever 305 (shutter front curtain and rear curtain The mechanical holding at both travel preparation positions is released, and thereafter shutter travel is enabled by controlling the energization of the control electromagnet.

Note that, as can be easily understood by comparing and referring to both FIG. 3(a) and FIG. 3(b), the mirror drive cam 1
The mirror-up drive phase of the mirror drive lever 130 by the shutter charge cam 141 and the charge drive phase of the seesaw lever 305 by the shutter charge cam 141 are set to be completely shifted from each other. That is, as shown in FIG. 3(a), when the seesaw lever 305 is charged and pushed by the shutter charge cam 141, the mirror drive cam 121 does not push the mirror drive lever 130, and the movable mirror 70 is moved. The camera is in the down state (finder observation position). As shown in FIG. 3(b), the mirror drive cam 121
The mirror drive lever +30 is pushed to move the movable mirror 70.
When the shutter is in the up state (exposure retreat position), the shutter charge cam! 41 does not push the seesaw lever 305,
The shutter unit 300 is released from charging and also releases the mechanical holding of the leading and trailing shutter curtains at the travel preparation positions.

160 is a signal board, which is fixed to the base plate 101 with screws. There are three position detection patterns on this signal board 160, namely a ground pattern +61. Operation end detection pattern 162 and overrun detection pattern 1
63 is formed by vapor deposition or the like. Each pattern 1
The relationship between the brushes 61 to 163 and the brush 122 fixed to the back surface of the mirror drive gear 120 is shown in FIG.
This will be explained using b).

Here, the sliding portion 122a of this brush 122 is divided into comb-like shapes, and each pattern 161-
This increases the safety of contact with 163. Note that the actual sliding position, that is, the contact point in this sliding portion 122a is a position 122b on a line slightly inside the tip of the brush.

FIG. 4(a) shows the phase in which shutter churn completion is detected, which corresponds to FIG. 3(a) above.
22 rotates clockwise as shown by the arrow in response to the clockwise rotation of the mirror drive gear 120, and in the state shown in FIG. When the potential of the connector portion (land portion) 162a of the detection pattern 162 changes to the ground level, completion of shutter charging is detected. To explain this detection in more detail, the connector portion (land portion) 161a of the ground pattern 161 is supplied with a force described later and a ground level signal in the camera control circuit, while the output of the connector portion 162a of the operation end detection pattern 162 is is supplied to the camera control circuit (input port pH). and,
When the brush 122 is in a position just before the state shown in FIG. 4(a) (this can be understood by replacing the brush 122 with a position rotated counterclockwise from the position shown in FIG. 4(a)). In this case, the sliding part 122a of the brush 122 is in contact only with the ground detection pattern 161, and this detection and I
The I pattern +62 has not changed to the ground level.

From here, the mirror drive gear 120 rotates clockwise, and at the same time, the swing 122 also rotates in the clockwise direction.
When the position shown in FIG. The level changes to the ground level, and the camera control circuit detects the shutter charging completion state and controls the rotation of the first motor Ml to stop. The difference between the position of the brush +22 in FIG. 4(a) described above and the position of the brush 122 in FIG. 3(a) described above is as follows.
At the position shown in FIG. 4(a), the first motor Ml is controlled to stop a.
i+ (braking) is performed, but the first motor M1
The motor cannot be stopped instantaneously and a slight overrun occurs, and FIG. 3(a) shows the stopping position of the first motor Ml in a state where the overrun occurs.

However, for the sake of explanation, the stopping position of the mirror drive gear 120 (brush 122) in FIG. The mirror drive gear 120 can be stopped during the run. As is clear from FIG. 3(a), the charge cam 1111 has the first
Assuming an overrun of the motor M1, a flat cam surface 141b is formed to continue the shutter charging completion state to cope with the overrun.

On the other hand, FIG. 4(b) shows the phase in which mirror-up completion is detected, which corresponds to FIG. Accordingly, as shown by the arrow, the sliding portion 12 is rotated clockwise from the state shown in FIG. 4(a) to the state shown in FIG. 4(b).
2a switches from contact with both the ground pattern 161 and the operation end detection pattern 162 to non-contact with the detection pattern 162, and the potential of the connector portion (land portion) 162a of the detection pattern 162 changes from the ground level to the initial level (usually H). Completion of mirror up is detected by the change in level).

This detection can be explained in more detail by replacing the brush 122 with the position before the state shown in FIG. 4(b) (the position where the brush 122 is rotated counterclockwise from the position shown in FIG. 4(b)). (can be touched), Bran 1
The sliding portion 122a of No. 22 is in contact with both the ground pattern 161 and the operation end detection pattern 162, and the output of the connector portion 162a of the operation end detection pattern 162 still supplies a ground level signal to the camera control circuit. are doing. From here, the mirror drive gear 120 further rotates clockwise, and at the same time, the brush 122 also rotates clockwise, and when it reaches the position shown in FIG. Shifting to the contact state, the potential of the operation end detection pattern 162 changes from the ground level to the initial level, and the camera control circuit detects the mirror-up completion state and stops the rotational drive of the first motor Ml. Control.

Note that the position of the brush 122 in FIG. 4(b) described above is different from the position of the brush 122 in FIG. 3(b) described above because the first motor Ml is in the position of FIG. Although stop control (braking) is performed, the first motor M1 cannot be stopped instantaneously and a slight overrun occurs. It shows the stop position in a state where the overrun has occurred. However, the mirror drive gear 120 (brush 1
For the sake of explanation, the stop position 22) shows the state when the above-mentioned overrun reaches a calculated maximum; in reality, the mirror drive gear 120 can be stopped with a slightly smaller amount of overrun. As is clear from FIG. 3(b), the mirror drive cam 121 is connected to the first motor M.
Assuming an overrun of 1, a flat cam surface 121b is formed to continue the mirror-up completed state to cope with the overrun.

Now, to give a more comprehensive explanation of the relationship between shutter charge and mirror up mentioned above, first of all, what is important is all the operations, that is, shutter charge and mirror up, as well as shutter charge release and mirror down allowance. are performed by rotating the first motor M in the same direction. That is, when the first motor Ml rotates in the counterclockwise direction (the output gear 102 rotates in the counterclockwise direction) as shown in FIG. In the state of meshing with 106,
All actions are performed. Then, the first motor Ml
The rotational force rotates the mirror drive gear 120 clockwise and rotates the gear changer 1.40 counterclockwise. Furthermore, when the mirror drive cam 121 in the mirror drive gear 120 is in the position that allows mirror down (FIG. 3(a)), the shutter turn cam 141 in the shutter charge gear 140 is in the position to charge the shutter (FIG. 3(a)). (a)), and when the mirror drive cam 121 is in the position for mirror up (FIG. 3(b)), the shutter charge cam 141
is at the position where the shutter charge is released (FIG. 3(b)).

Then, the above-mentioned operation is repeated by the counterclockwise rotation of the first motor Ml, and the shutter charging is completed ( Figure 3(a))
When the camera control circuit detects the release operation, it rotates again in the same direction.
Next, when the mirror up is completed (Fig. 3 (b)), it stops once again, and then, when the camera control circuit detects the completion of the glossy run, it rotates in the same direction again, and the next shutter charge is completed (the second At the time shown in FIG. 3(a), the sequence of once stopping is repeated. The overrun detection pattern 162 is used to detect that the overrun during the stop operation of the first motor Ml has exceeded a predetermined value.
If the overrun detection pattern 163 changes from the initial level to the ground level at the time of completion of shutter charging in a), or if the detection pattern 163 changes from the ground level to the initial level at the time of completion of mirror up in FIG. 4(b), 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 explained.

The movable mirror 70 is made up of a reflecting mirror 71 fixed to a support frame 72, and the support frame 72 has rotation shafts 73 formed at both ends thereof, and can be rotated into the mirror box 60 by the rotation shafts 73. Supported. A mirror pin 74 is formed on one side 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 always biased counterclockwise (mirror-down direction) by a spring 75, and the mirror drive lever 130 is in the mirror-down permission state (FIG. 3(a)). When the movable mirror 7
0 is rotated counterclockwise by the biasing force of the spring 75 and returns to the mirror down (finder observation position) state.

Next, the structure of the shutter unit 300 assembled into the mirror box 60 will be explained based on FIGS. 6(a) and (b).

Incidentally, the single shutter unit 300 in this embodiment has already been filed as Utility Model Application No. 1983-39629.

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

In these figures, reference numeral 301 indicates a base plate forming the support frame, and reference numeral 301a indicates an exposure aperture thereof.

Reference numeral 302 denotes a charge lever in the shack unit 300 for charging the blade drive levers 303 and 304 (hereinafter simply referred to as drive levers), which constitute a blade drive means. The rear drive lever 303 is for driving the rear blade group 351, and the leading blade drive lever 304 is for driving the leading blade group 352.

305 is a seesaw lever for charging up the shutter unit, and a rotating shaft 3 installed on the shutter base plate 301
When the roller 152 of the shutter charge lever 150 of the shutter charge mechanism shown in FIG. is rotated counterclockwise in FIG. 6(b), and the foot 3 of the charge lever 302 is rotated through the link lever 306 connected thereto.
02C is provided to rotate clockwise in the figure, and charging is completed by transitioning from the state shown in FIG. 6(b) to the state shown in FIG. 6(El).

307, :(08 is the light drive lever 304 and the rear drive lever 303 charged by the charge lever 302.
A front tensioning lever 307 and a rear tensioning lever 308, 321, and 322, which prevent the rotation of the shutter until a shutter travel signal is issued from a camera control circuit (to be described later), hold the rear blade group 351 in a parallel link, and Each rotation axis 326
, 327 to move the trailing blade group 351, and 323.degree. This is a leading blade traveling arm that rotates to travel the leading blade group 352.

In this embodiment, in addition to the above configuration, a pair of light shielding blades 341. 34.2 in Figure 6(b)
The shading device is configured to be moved upward from the retracted position to the shading position shown in FIG. 6(a) in conjunction with the rotation of the seesaw lever 305 for charging up.

In the light shielding device in this example, the two L-shaped light shielding blades 3/11.342 are engaged with the glossy base 301 at the rising part of the L shape by the engagement of the pin and the long groove.
The downward movement is guided, and the L-shaped legs 341a,
342a, the seesaw lever 305 and the lever 331.
332, so that linked movements of upward movement and downward movement are provided.

The guide mechanism is constructed by a guide pin 371 installed in the shutter base plate 301 being fitted into and engaged with long grooves 341b and 342b formed in the L-shaped rising portions 341c and 342c of the light-shielding blades 341 and 342 and extending generally in the vertical direction. has been done.

With the above configuration, the light shielding blades 341 and 342 are moved from FIG. 6(b) to
By performing the upward movement shown in Fig. 6(a) and rotating the seesaw lever 305 clockwise, Fig. 6(a) → Fig. 6(
b) The downward movement is performed, and the valley light shielding blade 341
．． 3/12 and rotating shaft 3 of seesaw lever 305 :l
1 and 332 by a certain amount, the -L movement and downward movement strokes are made to be different, which reduces the accommodation volume due to overlap at the retracted position and the deviation at the light shielding position. The light shielding area is covered over a predetermined range by spreading. Note that 360 is a spring member that always biases the seesaw lever 305 in the 31 direction (charge release direction).

A release configuration is shown in FIG. This tension release structure itself uses the structure of Japanese Patent Laid-Open No. 17936/1983, which was filed earlier by the present application and has already been published.

In the figure, reference numeral 307 is a board for the tension release configuration, which supports the tension release configuration by electromagnetic control.

Note that this board 370 is the same as the shutter base plate 30 in FIG.
It is assembled into 1. 380.386 are the armature lever for the leading blade and the armature lever for the trailing blade, respectively, and the yoke 382.38 is attached to the base plate 370.
8, are rotatably supported by shafts 381 and 387, respectively, and biased clockwise and counterclockwise by springs 384 and 390, respectively. 385 and 391 are set on the board 370, respectively, and the armature levers 380.
This is a stopper bin that restricts the initial rotation position of 386. One end 380a of the armature lever 380 comes into contact with the pin 307a of the tip tension lever 307 at a position rotated a predetermined distance counterclockwise from the initial rotation position shown in FIG. 7, and can release the tension. . Also, armature lever 3
One end 386a of the rear tension lever 308 can come into contact with the pin 308a of the rear tension lever 308 to release the tension at a position rotated a predetermined distance clockwise from the initial rotation position shown in FIG. 383 and 389 are coils, and when energized, the armature lever 380. 386 respectively spring 3
84. Suction rotation against 394. In the figure, 370a indicates the shutter charging state (Fig. 6(a)).
This is the notch portion that the pin 307a of the tip tensioning lever 307 comes into contact with. Although omitted from FIG. 6 due to its complexity, the end tensioning lever 307 is biased counterclockwise by a weak spring, and the pin 307a is
It is set so as to come into contact with the inner edge of the notch 370a. Further, in the figure, reference numeral 370b denotes a notch portion with which the pin 308a of the rear tensioning lever 308 comes into contact in the shutter charging state (FIG. 6(a)). Although omitted in FIG. 6 due to the complexity of the illustration, the rear tensioning lever 308 is biased in the 51 direction by a weak spring so that the pin 308a comes into contact with the inner edge of the notch 370b. It is set. In addition, in FIG. 2, 392 is a cover that serves as dustproof and electromagnetic shield.

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

When the camera completes a series of photographic operations and the shack completes its travel, it will be in the state shown in FIG. 6(b).

Next, a charging operation is immediately performed in preparation for the next photographing operation.

This charging operation is provided by rotating the shutter charging lever 150 in the counterclockwise direction shown in FIGS. 2 and 3.

This charging operation is performed by applying an operating force in the direction of the arrow shown in the figure from the roller 152 of the shutter charge lever 150 to the tip 305a of the seesaw lever 305.
A rotational movement (clockwise direction in the figure) is applied to the charge lever 302 through a link lever 306 that engages with a shaft 305b at the other end of the charge lever 302 and a shaft 302c implanted in the charge lever 302.

As the charge lever 302 rotates, the feet 302a, 302b of the charge lever come into contact with the rollers 303a, 304a of the drive lever 303, 304, respectively, giving rotational movement to the drive lever 303, 304.

When the drive levers 303 and 304 rotate, the rear blade traveling arm and the leading blade traveling arm engage with the respective shafts 303b and 304b through the holes 321a and 323a.
21 and 323 to move the rear blade group 351 and the leading blade group 352, which are linked to each arm, upward in the drawing.

As the charging progresses in this way, the drive lever 303°30
4 protrusions 303c and 304c are the tension lever 30.
When it reaches a position where it can engage with the tip of 7°308,
The shutter charge is completed and the next release operation? 5+
The state shown in FIG. 6(il) is reached.

Here, in the process of charging the seesaw lever 305, the rotating shaft 331°3 of the seesaw lever 305''
Shading blades 34 rotatably attached to 32, respectively.
1 and the light shielding blade 342 are moved upward in the figure. At this time, since the light shielding blade 341 and the light shielding blades 3 and 12 are engaged with the kite pin 371 through their respective long guide grooves 341b and 342b, their postures are regulated by the guide pin 371 and remain almost horizontal in the figure. It moves in one direction in the figure, and moves to the position shown in FIG. 6 (1) in the charging completed state to cover the lower part of the exposure opening 301a of the shutter base plate 301.

Charging is completed in this state (FIG. 6(a)), and the camera waits in this state until the next release operation is performed.

Next, the release operation will be explained.

When the release button 12 is pressed, the mirror-up operation described in FIG. 3 is performed, and at the same time, the shutter charge lever 150 is retracted from the position shown in FIG. 6(a) to the position shown in FIG. 6(b). do.

Next, the solenoid/<-305 is rotated clockwise in the figure by the spring member 360, and the link lever 306 gives counterclockwise rotation to the charge lever 302 linked to the seesaw lever 305.
The state shown in FIG. 6(b) changes from the state shown in FIG. 6(a).

As the no-saw lever 305 rotates, the rotation shaft 3
The shading blades 341 and 342, which are rotatably attached to the seesaw lever 305 by 31 and 332, are regulated by the guide pin 371 by the respective long guide grooves 341b and 342b, and are moved downward while maintaining a substantially horizontal state in the figure. , moves from the state shown in FIG. 6(a) to the state shown in FIG. 6(b), and retreats outside the exposure aperture 301a of the shutter base plate 301.

The camera control circuit detects that the above 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 shown in FIG. 4(b)) Then, the camera control circuit first energizes the coil 383 shown in FIG. 7, and the armature lever 380 is attracted to the suction surface of the yoke 382 and rotates in the anti-training direction against the spring 384. The suction rotation of the armature lever 380 causes the one end 380a to push the pin 307il, and the end tensioning lever 307 rotates clockwise to disengage from the protrusion 304C, and the light drive lever 304 rotates in the special training direction,
The leading blade traveling arm 323 also rotates in the same direction, causing the leading blade group 352 to travel (downward in the figure) to start exposure. Then, at a predetermined timing, the camera control circuit energizes the coil 389 shown in FIG. . Due to this suction rotation of the armature lever 386, the one end 386a pushes the pin 308a, and the rear tension lever 308
rotates clockwise and disengages from the protrusion 303c, the rear drive lever 303 rotates clockwise, and the rear blade traveling arm 321 also rotates in the same direction, causing the rear blade group 351 to travel. (traveling downward in the figure) to complete the exposure.

The description so far has been about the mirror box drive mechanism 100 and the shutter unit 300 that are built into the mirror box 60.

Next, the film rewind drive mechanism 200 will be explained.

In FIG. 2, FIG. 3, and FIG. 5, 201 is a rewind gear, which is rotatably supported by a hole in a base plate 210 and a boss 212a of a base plate 212 that unitize the film rewind drive mechanism 200.

Note that this main plate 210 is the patrone chamber 4 in FIG.
4, and the mirror box 60 is sometimes assembled to the camera body at a position where the rewind gear 201 can engage with the planetary gear 105 when it revolves clockwise. The location is set to . 202 is a rewinding fork, and 203 is a connecting member.

A connecting member 203 is provided at the lower part 201a of the rewinding gear 201.
is fixed by the screw 205, while the rewinding fork 2
02 is movable independently in the thrust direction with respect to the connecting portion 203, and is supported so as to be interlocked in the rotational direction. The coil spring 203 serves to constantly bias the rewind fork 202 downward, and when loading the film cartridge 50 into the cartridge chamber 14, the chain rewind fork 202 resists the coil spring 203. It becomes possible to move upward. 202a in the figure is a fork portion of the rewinding fork 202, which meshes with the cartridge shaft 51 of the film cartridge 50.

The operation of this film rewind drive mechanism 200 will be explained.

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

Then, when the planetary gear 105 and the rewinding gear 201 mesh, the small power overcomes the friction of the coil spring 111 (the planetary gear 105 slips and rotates with respect to the planetary shaft 110), and the planetary gear 105 reverses the rotation. It rotates in the 8-1 direction and transmits the rotation of the first motor M1 to the rewinding gear 201. Further, the clockwise rotation of the rewinding gear 201 is caused by the rewinding fork 20 via the connecting member 204.
2, and the rewinding fork 202 rotates, whereby the cartridge shaft 5 of the film pa i-rone 50 is rotated.
1 rotates in the rewinding direction (clockwise) to rewind the film 52.

Next, the film winding drive mechanism 400 will be explained based on FIGS. 8 and 9. The film winding drive mechanism 400 alone in this embodiment has already been disclosed in Japanese Patent Application No. 61-5.
It has been filed as No. 3455.

FIG. 8 shows an exploded perspective view of the entire structure of the film winding drive mechanism 400. In the figure, 401 is a spool, and a cylindrical peripheral surface 401a is coated with rubber to improve the grip of the film. Furthermore, an engaging protrusion 401b that engages with a gear 410, which will be described later, is formed on the lower edge.

A sprocket 402 is provided with a plurality of pawls 402a that engage with the film perforation rayon 54. /I O: 3 is a film guide, and a guide roller 4031 that is rotatably supported is formed. M2 is a second motor placed inside the spool +01, and a motor pinion (output gear) 401 is used as an output.
Ia is configured.

Reference numeral 1105 is a transmission gear that meshes with the second mortar pinion 40 = 1a, and 406 is a common sun gear for two planetary clutches, which will be described later, and is meshed with the transmission gear 405. Specifically, this sun gear 406 includes a large gear A06a that meshes with the transmission gear 405, and a planetary gear 411°4, which will be described later.
It has a two-stage gear structure with a small gear 406b constantly meshing with 13. 412 is a spool-side planetary lever, which is rotatably supported on the same axis as the sun gear 406, and frictionally coupled to the sun gear 406 by a coil spring or the like, so that it rotates in response to the rotation of the sun gear 406. , and is configured to swing in the direction of rotation. Further, a spool-side planetary gear 411 that meshes with the small gear 406b is rotatably supported at the swing end position of the spool-side planetary lever 412. A sprocket-side planetary lever 414 is rotatably supported on the same axis as the sun gear 406, and is frictionally coupled to the sun gear 406 by a coil spring or the like, and rotates in response to the rotation of the sun gear 406. , and is configured to swing in the direction of rotation. Further, a sprocket-side planetary gear 413 that meshes with the small gear 406b is rotatably supported at the swing end position of this sprocket-side planetary lever III4. 40
Reference numeral 9 denotes a spool-side transmission gear, which is disposed at a position where it can mesh with the spool-side planetary gear 411, so that the sun gear 406 rotates counterclockwise to rotate the spool-side planetary lever 412 counterclockwise. When oscillated, the spool side planetary gear 411 and the large gear 40 of the transmission gear 409
9a, and is disengaged as the sun gear 406 rotates clockwise. 410 is the above transmission gear 409
This is a spool gear that meshes with the small gear 409b of the spool 401, and the engagement protrusion 401b of the spool 401
The spool 401 is rotated.

On the other hand, 407 is a sprocket side transmission gear, which is disposed in a position where it can mesh with the sprocket side planetary gear 413, and when the sun gear 406 rotates counterclockwise, the sprocket side planetary lever 114 rotates. When the sprocket side planetary gear 41 is swung in the counterclockwise direction 51,
3 and the large gear 107a of the transmission gear 407 are engaged with each other, and the meshing is released as the sun gear 406 rotates clockwise. 408 is the small gear 407 of the transmission gear 407.
This is a sprocket gear that meshes with the sprocket l-402, and is fixed to the sprocket l-402 to rotate the sprocket 402. 415 is a holding lever fixed to the sprocket side planetary lever 414, and a holding pin 415a is attached at the tip.
is formed.

Reference numeral 416 denotes a holding switching member that can obtain two states, a state in which the holding lever 415 is held and a state in which the holding is released, at the rotating position, and a claw portion 4 that hooks the holding pin 415a.
16a, a protrusion 416b that is pushed when the back cover 430 is opened and closed, which will be explained later in FIG. 417 and 118 are base plates for pivotally supporting the various gears mentioned above, and are assembled to the camera body 40 at a position near the spool chamber 43 in FIG. 420 is a rotating board for detecting the rotational state of the sprocket 402, and rotates in conjunction with the sprocket 402. A first pattern portion 420a whose entire circumference is ring-shaped is formed near the center on the lower surface of this rotary substrate 120, and a plurality of radial patterns connected to the first pattern portion 420a are formed near the outer diameter. A second pattern 420b is formed, and a third pattern 420c is further formed radially extending one of the second pattern portions 420b. '422.423.
A sliding brush 424 slides on the rotation base 420 to convert the rotational state of the sprocket 402 into an electrical pulse signal, and the sliding brush 422 slides on the first pattern portion 420a. , the sliding brush 424 is
The sliding brush 423 slides on the pattern portion 420b, and the sliding brush 423 slides on the third pattern portion 420c.Detailed connection circuits are not shown in this figure, but as is known in the art for this type of rotation detection. For example, by applying a power level voltage to the sliding blank 422, the sprocket l-
Pulse signals can be output from the sliding swings 424 and 423 in accordance with the rotation of the slider 402.

The film winding drive mechanism 40 described above with reference to FIG.
0, the starting point is the sun gear 406 that rotates due to the rotation of the second motor M2, and the spool side planetary gear 411→
Transmission gear 409 → Spool gear 1IlO → Spool 40
1, the first winding transmission system that rotates the spool 401 is the same (starting from the sun gear 406, the sprocket side planetary gear 413 → transmission gear 407 → sprocket gear 408 → sprocket 402). A second hoisting transmission system for rotating the spool 402 is configured.The circumferential speed ratio of the spool 401 by the first hoisting transmission system is equal to the circumferential speed ratio of the sprocket 402 by the second hoisting transmission system. The winding transmission system 411, 409, 410, and 401 is set to be larger than that of the first winding transmission system 411, 409, 410, and 401. 406, spool-side planetary gear 411. A first planetary clutch consisting of a spool-side planetary lever 412 and a transmission gear 409 is configured, and similarly the second winding-L-edge transmission system 41
3,407,408,402 has a sun gear 406. Sprocket side planetary gear 413. A second planetary clutch includes a sprocket-side planetary lever 414 and a transmission gear 407.

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

Figure 9 (a> shows the initial state of AL start,
The small gear 406b of the sun gear 406 rotates counterclockwise, and both planetary levers 412. - Swing 114 counterclockwise to engage the spool-side planetary gear 411 with the spool-side transmission gear 409 (large gear 4o9a), so that the spool 40
1 in the winding direction, and on the other hand, the sprocket side planetary gear 413 is rotated to the sprocket side transmission gear 407 (large gear 4
07a) and rotate the sprocket 402 in the winding direction, it is possible to feed a part of the film leader to the spool 401 and to wind it around the spool 401. Note that the back cover 430 is in an open state, and the elastic protrusion 430a, which is elastically deformable, presses the protrusion 416b to the position shown in the figure, and the holding switching member 416 is moved counterclockwise beyond the position shown in the figure by the biasing force of the biasing spring 440. It prevents it from rotating in any direction. Note that although the elastic protrusion 430 of the back cover 430 is set so as not to be deformed much by the urging force of the urging spring 440, it is natural that the rotation of the holding switching member 416 by a slight angle in the counterclockwise direction is caused by elasticity. It is set to allow modification. This Fig. 9(a) and Fig. 9(e) described later
) The back cover detection switch 480 described in
, 482 is conductive or non-conductive, the open/closed state of the back cover 430 can be detected. .

Note that by winding the film by a predetermined even amount in the state shown in FIG. 9(a), a portion of the film leader will be wound around the spool 401 if AL is successful.

FIG. 9(b) is in the middle of AL, that is, the sprocket 402
After driving M2 for a predetermined number of frames of the film, the second motor M2
This figure shows a state in which the gear is reversed and started to rotate clockwise after being stopped once, and the small gear 406b of the sun gear 406 rotates clockwise to swing both planetary levers 412 and 414 clockwise. Therefore, the spool side planetary gear 41
1 is disengaged from the spool side transmission gear 409 (large gear 409a), while the sprocket side planetary gear 413
The meshing with the sprocket side transmission gear 407 (large gear 407a) is also released.

Further, as the sprocket-side planetary lever 414 swings clockwise, the holding lever 415 also moves in the right arrow direction in the figure, and the holding bottle 415a is locked with the claw portion 416a of the holding switching member 416. It will be in the previous state.

FIG. 9<c> shows that the second motor M2 is further rotated clockwise from the state shown in FIG. This shows the state in which the bin 415a is completely locked by the claw portion 416a, and in this state, the sprocket side planetary lever 414 is held in the position shown in the figure, and the subsequent rotation of the sun gear 406 in the counterclockwise direction is prevented. It will no longer be possible to oscillate.

In FIG. 9(d), the second motor M2 is rotated counterclockwise again and only the spool 401 is rotated for one frame of film in order to determine the final operation of AL, that is, whether AL was successful or failed. Shows the state in which it is rotated. That is, as the small gear 406b of the sun gear 406 rotates counterclockwise, the spool-side planetary lever 412 swings counterclockwise, and the spool-side planetary gear 411 is connected to the spool-side transmission gear 409 (large gear 409a). The spool 401 is rotated in the winding direction by meshing with the spool 401. on the other hand,
A holding lever 415 of the sprocket-side planetary lever 414 is held by a holding switching member 416, and the sun gear 4
Even when the small gear 406b of No. 06 rotates counterclockwise, it cannot swing, and the sprocket-side planetary gear 413 and the sprocket-side transmission gear 407 are held in a disengaged state. Therefore, if the leader portion 56 of the film 52 is already securely wound around the outer periphery 401a of the spool 401 in the state before this FIG. 9(d), the spool in this FIG. Even when only 401 is driven, the film is further wound by one frame.
Sprocket 402 will rotate as the film moves.

On the other hand, the leader portion 56 of the film 52 is attached to the spool 401.
If it is not wrapped properly around the outer periphery 401a of the ninth
When only the spool 401 is driven in figure (d), the film 5
Since sprocket 2 does not move, sprocket 402 does not rotate, and in the state shown in FIG. 9(d), sprocket 4
By detecting whether or not the camera 02 rotates appropriately by one frame using a camera control circuit, which will be described later, it can be determined very easily whether AL has succeeded or failed.

FIG. 9(e) shows that the back cover 4 is used to replace the film leader part 50 with a new one after all frames of the film have been photographed.
30 is shown in the open state, and as is clear in the figure, the holding switching member 416 is attached to the elastic protrusion 4 of the back cover 430.
The holding (pushing) by 30a is released, and the biasing spring 440
The holding member 415 is rotated counterclockwise by the urging force of the holding member 415 to release the holding bottle 415a from the holding member 415 by the claw portion 416a. Therefore, when the back cover 430 is closed again for the next photograph, the holding switching member 416 can return to the state shown in FIG. 9(a). Naturally, in this returned state, the holding lever 415, In other words, the sprocket side planetary lever 41
4 can be released.

In this embodiment, both the spool 401 and the sprocket 402 are rotationally driven by the second motor M2 until the middle of AL. At the initial stage of L, the film leader part 56 can be fed and wound onto the spool 401. On the other hand, at the final stage of AL, only the spool 401 is rotated and the sprocket 402 is free. It is characterized in that success or failure of AL can be easily determined by detecting whether or not 402 is rotated by the film 52.

Therefore, the success or failure of AL is determined by sprocket 402.
This can be done using the rotary board 420 that is linked to the rotary board 420, compared to the conventional method in which a rotary wheel driven only by the film is newly configured as a detection mechanism, or a detection mechanism is configured to optically read the movement of the film perforation 54. The success or failure of AL can be confirmed with a simple configuration. In addition, in this embodiment, a rotating board 42 is used to detect the success or failure of AL.
Since 0 is also used as one-frame winding detection during normal photography after AL, this point also contributes to simplifying the overall configuration.

Next, based on FIG. 1O, the photographic lens 2 shown in FIG.
The electric diaphragm mechanism 500 configured within 0 will now 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, and a plurality of holes 5 are formed at equal intervals on the circumference centered on the optical axis O.
12 are formed.

Reference numeral 520 denotes a ring-shaped aperture drive ring, which is rotatably supported and has a plurality of cam holes (elongated holes) 522 radially formed at equal intervals on the circumference.

Reference numeral 530 denotes an aperture blade, which is disposed between the fixed ring 510 and the aperture drive ring 520, and pins 532 and 534 implanted on both sides of the blade are connected to the holes 512 of the fixed ring 510, respectively.
and is inserted into the cam hole 522 of the aperture drive ring 520.

540 is a gear cylinder, which is rotatably supported, and
It is fixed to the aperture drive ring 520. A toothed portion 542 is formed on the circumferential surface of this gear cylinder 540, and this toothed portion 542 meshes with the output gear 502 fixed to the output shaft 504 of the third motor M3.

Next, to explain the operation, the gear barrel 540 rotates clockwise due to the counterclockwise rotation of the third motor M3.
Correspondingly, the aperture drive ring 520 also rotates clockwise.
The aperture blades 530 are driven in the closing direction (counterclockwise) by sliding with the cam hole 522.

In other words, the diaphragm is driven in the direction of closing down while being opened.

On the other hand, the gear barrel 540 rotates counterclockwise due to the clockwise rotation of the third motor M3, and the aperture drive ring 520 also rotates counterclockwise accordingly, so that the aperture blade 530 is moved toward the cam hole 522. It is driven in the opening direction (clockwise) by sliding with. That is, the diaphragm is driven from the closed state to the open direction.

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

FIG. 11 is a circuit diagram showing the overall configuration of the camera control circuit. In Figure 11, BAT is a power supply battery, CON
It DC/DC Near:/Burke, Mcl is a microcomputer (hereinafter abbreviated as microcomputer).

DC/DC converter CON includes power supply battery BAT 4~
The unstable voltage over 6 volts is supplied from the input terminal IN and converted to a stable voltage of 5 volts, and the output terminal OU
Output from T. However, the DC/DC converter CON outputs a voltage of 5 volts when a high level signal is input to its human input terminal CNT, and stops voltage conversion operation when a low level signal is input, and outputs a voltage of 0 volts. Output voltage.

The control input terminal CNT of the DC/DC converter CON is connected to the output terminal P4 of the microcomputer MCI.
The operation is controlled by CI.

MC2 is a microcontroller with a built-in E"PP0M (non-volatile memory) capable of high-speed calculation processing, and ADl is an A/D
The converter, R1 and R2, are resistors. BUSI is a pass line for communication between the microcomputer MC2 and the A/D converter ADI. Resistors R1 and R2 are connected in series so as to divide the voltage of the power supply battery BAT, and input it to the input terminal IN of the A/D converter ADI. The A/D converter ADI performs A/D conversion on this voltage and transmits the converted value to the microcomputer MC2 through the pass line BUSI.

SPD is a silicon photodiode for measuring external light brightness (brightness of subject light that has passed through the photographic lens 2o).
AMP is an amplifier for increasing the output of the silicon photodiode SPD and performing temperature compensation. AD2 is an A/D converter for A/D converting the output of the amplifier rlJ AMP, and the output of the amplifier AMP is The terminal OUT and the input terminal IN of the A/D converter AD2 are connected. BUS2 is a path line for communication between A/D converter AD2 and microcomputer MC2, and A/D converter AD2 transmits photometric values to microcomputer MC2 through path line BUS2. The A/D converters ADI and AD2, the amplifier AMP, and the microcomputer MC2 are supplied with power from the 5V stable voltage output from the DC/DC converter CON, and perform circuit operations. Therefore, D.C.
When the /DC converter CON stops voltage conversion operation, the circuit is in a non-operating state.

SBP is a switch (back cover detection switch 48o 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. S.R.W.
is the rewind button 14 used to rewind the film.
(See Fig. 1), and is normally off, but turns on when the rewind button 14 is pressed.

SW2 is a switch that is linked to the release button 12 (see Figure 1), and is normally in the off state.
Press 2 to turn it on.

5CN2 is a switch that is linked to the rear curtain of the shutter of the camera, and is turned on when the rear curtain of the shutter finishes running.

Switches SBP, SRW, SW2 connect input ports PL, P2 . P3 and the input port P5 of the microcomputer MC2. They are connected to R6 and R7, respectively, so that both microcomputers MCI and MC2 can independently detect whether they are on or off. Switch 5CN2 is microcomputer MC2
is connected to the input port P8 of the microcomputer MC2 so that only the microcomputer MC2 can detect on/off.

BUS3 is a path line for communication between microcomputer MCI and microcomputer MC2. DISP is a display device using, for example, a liquid crystal display, for displaying the shutter speed, aperture value, and camera operating status after photometric calculation. DR is a display driving integrated circuit (hereinafter referred to as IC) connected to the display DISP and for driving the display o+sp. DR of the display driving IC and the microcomputer MC2 are connected via a pass line BUS4, and display information is transmitted from the microcomputer MC2.

The DR of the display driving IC is based on this data.
Drive p.

The microcomputer MCI and the display driving ICDR are supplied with power from either the power source battery BAT or the DC/DC converter CON through diodes DII' and DI2, respectively. Therefore, the camera is powered by a battery DAT.
The circuit is constantly operating while it is attached.

MG31 is an electromagnetic coil for starting the front curtain of the shutter (corresponds to coil 383 in Figure 7) MG3
Reference numeral 2 denotes an electromagnetic coil (corresponding to coil 389 in FIG. 7) for starting the rear curtain of the shutter.

Coil MG31 is connected to the collector of transistor TRI, and coil MG32 is connected to the collector of transistor TR2. The base of the transistor TRI is connected to the output port P1 of the microcomputer MC2 via the base resistor R3.
Similarly, the base of the transistor TR2 is connected to the output port P14 of the microcomputer MC2 via a base resistor R4. Microcomputer MC2 is output
) By outputting signals from R13 and R14, the shutter speed can be controlled.

Also coil MG31. MG32 is also used as an actual load resistance when checking the voltage while the shutter is locked so that it does not run, but this control is also performed using the output port P1.
3. This can be performed by the microcomputer MC2 based on the signal output from R14.

M2 is a second motor for winding the film (see especially FIGS. 8 and 9), and one end of both terminals of the second motor M2 is connected to a PNP transistor TR15, N
The collector of the PN transistor TR16 is connected, and the other end is similarly connected to the PNP transistor 'r Rl8, NP.
The :IL/actuator of the N transistor TR17 is connected. Transistor TR15, TR16゜TR17, TR
Each of the 18 bases has a base resistance R15, R16, respectively.
, R17, and RI8 to the output port P15. of the microcomputer MC2. P16. P17. Connected to R18.

The emitters of transistors TR15 and TR18 are connected to the (+) side of the power supply/battery B
The emitters of R16 and TR17 are connected to the (-) side.

The microcomputer MC2 has an output port P15. R16, R17
By outputting a signal from R18, the second motor M2 can be operated in forward and reverse rotation.

For example, output port P15. By outputting a high level signal from R16 and a low level signal to R17 and R18, transistors TR16 and TR18 are turned on, transistors TR15 and TR17 are turned off, and as a result, current flows from left to right. The second motor M2 rotates normally.

Conversely, by outputting low-level signals from output ports R15 and R16 and high-level signals to R17 and R18, transistors TR16 and TR18 are turned off, and transistors TR15 and TR17 are turned on. If the current flows from right to left, the second motor ~2 rotates in reverse.

Ml is a first motor for charging the shutter and driving the mirror; one end of the two terminals of the motor Ml is connected to the collectors of a PNP transistor TR19 and an NPNI transistor TR20; PNP transistor TR22, NPN transistor T
The collector of R21 is connected.

Transistors TR19, TR20, TR21, TR22
Each base has a base resistance R19, R20, R
Output port P1 of microcomputer MC2 via 21°R22
9° Connected to R20, R21, and R22.

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

The microcomputer MC2 controls the output port I)19 in the same way as controlling the second motor M2. By outputting signals from R20, R21, and R22, the first motor Pv11 can be freely operated in forward and reverse rotation.

A switch based on a conductive pattern drawn on the SM1 rotating board (rotating board 420, pattern 42 shown in FIG.
0a to 420C), the rotary board switch SMI rotates in conjunction with the sprocket 402 of the film winding drive mechanism 400. Signals from the switch SMI are connected to input ports P9 and I'IO of the microcomputer MC2, and the microcomputer MC2 can detect on/off signals of the pattern on the rotating board as the second motor M2 rotates. Similarly, switch SM2 is a brush sliding switch (brush 1 shown in Figures 3 and 4) that rotates in conjunction with the rotation of the cam that moves the mirror up and down and charges the shutter.
22 and a signal board 160), the signal from the switch SM2 is connected to the input port 1 of the microcomputer MC2.
-pH, because it is connected to R12, the microcomputer MC2
can detect on/off signals accompanying the unidirectional rotation of the first motor Ml.

TR3 is used to switch between supplying and stopping the power supply to the third motor M3 for driving the aperture on the lens side through the mount contact (a contact type contact placed on the other side of the camera mount part of the camera body and the lens mount part of the photographic lens). switching transistor, R6 is the base resistance of the transistor. The base of transistor TR3 is base resistor R6.
The output port P23 of the microcomputer MC2 is connected to the output port P23 of the microcomputer MC2.

As a result, the microcomputer MC2 can control the power supply to the third motor M3 for driving the aperture on the lens side. R5
is the transistor TR3 when the microcomputer MC2DC/DC converter CON is in the off state and the power supply is stopped.
This resistor is used to keep the transistor T
It is provided between the bases of R3.

MC3 is a microcomputer installed in a photographic lens that can be attached to a camera, and M3 is a third motor M3 also installed in the lens.This third motor M3 closes the aperture blades (see Figure 10). or opened.

One end of the two terminals of the third motor M3 is connected to a PNP transistor 1' R23 and an NPN transistor TR2.
Similarly, the collectors of a PNP transistor TR26 and an NPN transistor TR25 are connected to the other end. Transistor TR23°TR2
4. Each base of TR25 and TR26 is connected to a resistor R.
Microcomputer MC via 23, R24, R25, R26
3 output port P23. P24. P25. Connected to R26.

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 emitters of transistors TR16 and TR17 are also connected to the power supply battery BAT via the mount contact between the camera and lens.
Connected to the (-) side of the

The microcomputer MC3 has an output port P23. R24, R25
゜Output a signal from R26 and rotate the third motor M3 in the forward direction.

Reverse operation can be performed freely.

BUS5 connects to the microcomputer M on the camera side via the mount contact.
This is a pass line for communication between C2 and the microcomputer MC3 on the lens side. Using this pass line BUS5, the camera-side microcomputer MC2 instructs the lens-side microcomputer MC3 to drive the third motor M3 to narrow down the aperture blades to a predetermined position, or to move the aperture blades to the open position. It is possible to command the third motor M3 to be driven in the reverse direction in order to return to the maximum position.

Further, the microcomputer MC3 is supplied with power through the mount contact from the power source battery BAT or the DC/DC converter CON through the diodes DII and DI2, respectively.

Next, the operation of the control circuit of the camera connected as described above will be explained based on a flowchart.

The SCI is a communication path line for the microcomputer MC2 to communicate with the outside. The external terminal may be protruding from the outside of the camera body, or may be in a form that allows connection 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 E'FROM, the camera can be configured to automatically rewind.
The camera may have specifications that prohibit automatic rewinding.

FIG. 12 shows the operation flow of the microcomputer MCI.

When the power supply battery DAT is turned on, a power-on reset is applied to the microcomputer MCI, and operation starts from step 1.

The process will be explained below according to the flowchart.

[Step l] Output a high level signal to the output port P4, output a stable voltage of 5 volts from the DC/DC converter CON, and connect the microcomputer MC2 and photometric amplifier ANIIP.
and A/D converters ADI and AD2.

[Step 2] Read the back cover switch SBP to check whether the back cover 430 is open or closed. 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 flag X, which is a flag that stores the previous open/close state of the back cover. When flag X is 0, it indicates that the back cover is open.

If the flag X is 1, the process branches to step 4, and if it is 0, the process branches to step 7. Immediately after the power is turned on, the contents of the flag may be O or L.

[Step 4] Set flag X to O to remember that the back cover is open. After this, the process branches to step 9.

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

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

[Step 7] Read the state of switch SRW to check whether the rewind button 14 is pressed. If the rewind button 14 is pressed, go to step 9.
If it is not pressed, the process branches to step 8.

[Step 8] The state of the release switch SW2 is read to check whether the release button 12 is pressed. If the release switch SW2 is on, the process branches to step 9, and if it is off, the process branches to step 10.

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

[Step 2] Back cover DC/' DC converter CO
It is determined whether or not N is on, and if the DC/DC converter CON is off, the process returns to step 2. Thereafter, the reading of the switches is repeated until the opening/closing state of the back cover changes or the switch SRW or the release switch SW2 linked to the rewind button 14 is turned on.

[Step 11] Communicate with microcomputer MC2, and
The receiver receives the command issued from C2.

[Step 12] The command from microcomputer MC2 is DC/D
If the command is to turn off the C converter CON, go to step 13.
If it is not a command to turn off the DC/DC converter CON, the process returns to step 11 and waits until a command to turn off the DC/DC converter CON arrives.

[Step 13] Output a low level signal to output port P4 to turn off the DC/DC converter CON, and turn off the DC/DC converter CON.
13 Stop the output of the 5 volt stable voltage of the C converter CON.

The above is the operation of the microcomputer MCI. As can be seen from this flow, the microcomputer MCI controls the DC/ The DC converter CON is operated and power is supplied to the microcomputer MC2, the photometric amplifier AMP, and the A/D converters ADI and AD2. /DC converter CON is turned on, and when a command to turn off DC/DC converter CON is received from microcomputer MC2, the DC/DC converter CON is turned off.

Next, the operation of the microcomputer MC2 after the DC/DC converter CON is turned on will be explained. In addition, microcomputer M
From the moment the CI turns on the power battery BAT, it operates constantly.
The reason why the microcontroller MC2 is configured to receive power and start operation only when the DC/DC converter CON is on is because the microcontroller MCI only needs to perform the task of detecting switches, making it a low-power, low-speed system. This is because a microcomputer is assumed, and the microcomputer MC2 is assumed to be capable of high-speed processing with high power consumption.

FIG. 13 is a flowchart showing processing after power is supplied to the microcomputer MC2.

The process will be explained below according to the flowchart.

[Step 14] Read the back cover switch SEP.

When the back cover is open, the process branches to step 15, and when the back cover is closed, the process branches to step 18.

[Step 15] Check the flag l that stores the previous open/close state of the back cover. When flag I is 0, it indicates that the back cover is open. If the flag I is 1, the process branches to step 16; if the flag I is O, the process branches to 20. Regarding the memory contents of microcomputer MC2,
E2 whose memory contents will not be lost even if the power supply is stopped
There is no problem because it has FROM (non-volatile ROM) type memory. Also, if you do not have E"P ROM type memory, you can use an external button-type lithium
A known conventional technique may be used in which memory backup is performed using two batteries or the like and the memory contents are preserved even if the power supply to the DC/DC converter CON is stopped.

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

[Step 17] The contents of the film counter are stored in the memory, and the memory of this film counter is set to 0.

[Step 18] Check the flag that stores the previous open/close state of the back cover. If flag ■ is 1, step 2
If the flag I is 0, the process branches to step 19.

[Step 19] Since the back cover has changed from the open state to the closed state, flag I is set to 1 to remember that the back cover is closed. After this, the process branches to step 23, which is an autoloading sequence for the 13B tooth.

[Step 20] Read the state of switch SRW to check whether the rewind button 14 is pressed. If the rewind button 14 has been pressed, the program branches to the rewind sequence shown in FIG. 13D. If it is not pressed, go to step 21.

[Step 21] The state of the release switch SW2 is read to check whether the release button 12 is pressed. If the release button 12 has not been pressed, the process proceeds to step 176; if the release button 12 has been pressed, the process branches to the release sequence shown in FIG. 13F.

[Step 176] Communicate with an external host computer through the path line SC■.

[Step 177] The content of the communication from the outside is E” F R
It is determined whether the command is to rewrite the flag Z of the OM, and if it is a command to rewrite the flag Z, the process goes to step 178; otherwise, if it is determined that the host computer is not connected, the process goes to step 22.

[Step 178] Determine whether to set flag 2 to O to set automatic rewind prohibition mode or set flag Z to 1 to set automatic rewind mode, and set flag Z.
If it is set to 1, the process branches to step 179, and if it is set to 0, the process branches to step 180.

[Step 179] Set flag Z of E2FROM to 1, and then proceed to step 22.

[Step 180] Set the E2FROM flag Z to 0, and then proceed to step 23.

[Step 22] Perform processing to end the operation.

A command is output to the microcomputer MCI to stop the operation of the DC/DC converter CON. Thereafter, the microcomputer MCI turns off the DC/DC converter CON, thereby cutting off the operating power of the microcomputer MC2, and the process ends.

Next, the flow of the autoloading sequence shown in FIGS. 13B and 13C will be described. As explained in the processing flow after power supply, the autoloading sequence is a sequence that is jumped when the back cover changes from an open state to a closed state.

[Step 23), (Step 24), (Step 25) A.

Set each flag G and C to O.

[Step 20J Voltage check is performed. v Check the upper pressure using the shutter control electromagnet coil MG31. energize MG32 for 10 milliseconds and convert the voltage to A/D 7ii A I
) This is done by reading from 1, but the details are omitted because the flow would be complicated. Note that if the result of the voltage check is that the voltage has decreased, proceed to step 27; if the voltage is sufficient, proceed to step 28.

[Step 27] 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 END process is performed by jumping to step 22 described above.

[Step 28] In order to perform autoloading, the second motor M2 is caused to rotate normally (the sun gear 406 rotates counterclockwise as shown in FIGS. 8 and 9(a)).

The second motor M2 is controlled by the output port P15°PI3.
PI3. This is done by the signal output from PI3. Details are as described above.

[Step 29] Start a timer for counting the energization time of the second motor M2.

[Step 30] The previous state of the input port P9 is memorized (the flag A is checked).

When flag A is 0, the previous state of input port P9 is stored as being switched on, and when flag A is 1, the previous state of input port P9 is stored as being switched off. Note that the signal input to the input port P9 is a signal linked to the sprocket 402 (obtained from the sliding brush 424 shown in FIG. 8) as described above, and is transmitted multiple times (for example, 12 times) while winding up the film-sternum. If a signal that repeats on and off (the output of the sliding brush 424 is at the initial level and the ground level (repeated)) is input, and the on and off signal is repeatedly input, the microcomputer MC2 will switch to sprocket 4.
It determines that 02 is rotating and turns it on and off.

(If the repeating signal has stopped, the microcomputer MC2 determines that the sprocket 402 has stopped. Step 3
0, if flag A is 1, go to step 33;
When is O, the process branches to step 31.

Immediately after the autoloading sequence starts, step 23
Since flag A is set to O in step 31, the process branches to step 31.

[Step 313 The previous state of the input port P9 is compared with the current state. If it has changed, go to step 32.
If there is no change, go to step 36.

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

[Step 33] Similar to step 31, compare the previous state and the current state of input port P9, and if there has been a change, proceed to step 34; if not, proceed to step 36.

[Step 34] Since the input state of input port P9 has changed, 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 was no change in input port P9, check the timer that counts the energization time of the second motor M2, and check that there is no change in the input port for a predetermined period of seconds (for example, 350 milliseconds). If the time is determined to be that the sprocket 402 is stopped, the process proceeds to step 37, and if the time of 350 milliseconds has not yet elapsed, the process proceeds to step 37.

Go to 38.

[Step 37-1] Stop the energization of the second motor M2, and perform the empty charging sequence (step 37-2), which will be described later.
) to jump.

[Step 38] Check flag C, which is a flag for remembering the previous state of input port P10. When flag C is 0, the previous input capo-hP1. o state is stored as a switch-on state, and when flag C is 1, the previous state of input port P1O is stored as a switch-off state. The signal input to the input port PIO is a signal linked to the sprocket 402 (obtained from the sliding brush 423 shown in FIG. 8), and the switch is turned on (sliding moving brush 4
23 is switched to ground level). Also, the next film - when you start winding the sternum, it immediately turns off (
The output of the sliding brush 423 is switched from the ground level to the initial level), and is turned on when winding for the next frame is completed. Therefore, by detecting this signal, the microcomputer MC2 can control the winding and rewinding of the film frame. In step 38, if the flag C is 1, the process branches to step 41, and if the flag C is O, the process branches to step 39. Immediately after the autoloading sequence operation, the flag C is set to 0 in step 25, so the process branches to step 39.

[Step 39] Compare the previous state of input port PIO with the current state. If it has changed, step 110
If there is no change, return to step 30.

[Step 40] Since the input state of the input port PIO has changed, the flag C is newly set to 1. Then step 30
Return to continue autoloading.

[Step 41] Compare the previous state of input port PIO with the current state. If it has changed, the process goes to step 42; 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 PIO has changed, the flag C is newly set to 0.

[Step 43] Since the input boat PIO signal has switched from off to on, it means that the winding of the sternum has finished, and the memory G, which is the memory that counts the number of winding frames during autoloading, is incremented. do.

[Step 44] 3 empty windings during autoloading
Check if the piece is finished. If after finishing 3 frames, go to step '48; otherwise, go to step 4
Branches into 5.

[Step 45] It is checked whether or not empty film winding has been completed for 4 frames during autoloading.

If the 4 frames have been completed, the process goes to step 46, and if the AL 4 frames have not been completed, the process returns to step 30 to continue autoloading.

[Step 46] Since the empty winding of four frames of film has been completed during autoloading, the second motor M2 is stopped.

[Step 47] Data is transmitted to the DR of the display driving IC to display a display indicating that autoloading has been completed, and then the process branches to step 22 described above to end the process.

[Step 48] Steps 48 to 53 are a sequence regarding switching of the film drive method after winding of three frames is completed. In step 48, the second feeding motor M2 is once stopped.

[Step 49] Wait 100 milliseconds until the second motor M2 completely stops.

[Step 50] To switch the film drive method, the second motor M2 is reversely rotated (the sun gear 406 rotates clockwise as shown in FIGS. 8 and 9(b)).

[Step 51] Time-reverse energization is performed for 100 milliseconds (energization is continued until the state shown in FIG. 9(C) is reached).

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

[Step 53] Wait 100 milliseconds until the second motor M2 completely stops. Thereafter, the process returns to step 28, and empty winding is performed in the autoloading of the fourth and final frame.

Specifically, the second motor M2 once again rotates in the normal direction (Fig. 8,
As shown in FIG. 9(d), the sun gear 406 rotates counterclockwise again. However, in this state, Fig. 9 (d
), the rotation of the second motor M2 is not transmitted to the sprocket 102 but to the spool 401. Therefore, in such a sprocket-free state, if the film 52 is actually fed in the winding direction (by rotation of only the spool 401), and the sprocket 402 is rotated by the meshing of the film perforation 54 and the sprocket 402, If the autoloading is successful, but the sprocket 402 is not rotating as a result, it means that the autoloading has failed, for example, because the film leader part 64 is not wound properly around the spool 401. I can judge.

Next, the empty charging sequence shown in FIG. 13c will be explained. As explained in the autoloading sequence (FIG. 13B), the empty charging sequence is performed when it is determined that the sprocket 402 stops rotating during autoloading. Further, as will be described later, the sequence jumps from the rewinding sequence shown in FIG. 13E.

[Step 37-2.1 In order to start mirror up, the first motor M1 is energized for normal rotation (FIG. 3(a)).

(b) As shown in FIG. 5(a), the sun gear 10.1 starts rotating in the counterclockwise direction by rotating the first motor Ml in the counterclockwise direction.

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

[Step 55] When the brush starts moving, it is made to wait 15 milliseconds so as not to be affected by gearing.

[Step 56] Check the state of the pH (output signal of the operation end detection pattern 162 in FIGS. 3 and 4). The signal input to the input port pH is a signal linked to the mirror drive gear 120 and shutter charge gear 140 (mirror drive cam 121, shutter charge cam 141) explained in FIGS. 3 and 4, and the rotating brush Completion of shutter charging and completion of mirror up can be detected as a change in potential in a sliding state between I22 (always connected to the ground level by sliding with ground pattern 161) and operation end detection pattern 162.

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

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

For reference, the relationship between the input port pH and the input port PI3 is explained here (input port PL2 becomes the output signal of the overrun detection pattern 163 in FIGS. 3 and 4, and rotates. In the sliding state of the brush 122 and the overrun detection pattern 163, the amount of overrun of the first motor Ml (a state in which it rotates from when the stop control is performed until it actually stops) when the shutter charging is completed and It is possible to detect whether or not the amount of overrun of the first motor (M) is within the allowable setting range when the mirror up is completed.Specifically, it can be determined as a change in potential. If port I"12 remains off (initial level), the overrun amount is within the set range; if it turns on (changes from the initial level to ground level), it can be determined that the overrun amount has exceeded the set range. Furthermore, 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 turned off, it can be determined that the overrun amount exceeds the set range.

In addition, the relationship between input port pH (!: PI2 is normally when shutter charging is completed (mirror down state), input port pH is turned on, input port P12 is turned off, and movable mirror 70 is turned on.
The input port pH is turned on while the shutter is starting to rise, the input port P12 is turned on, the input port pH is turned off when the mirror is raised (shutter charge is released), the input port P12 is turned on, and the shutter is turning (while the movable mirror 70 is being lowered). ), the input port pH is turned off and the input port P12 is turned off.

[Step 57] Check the timer that measures the time since the first motor Ml is energized.

If 500 milliseconds have elapsed, go to step 58;
If 0 milliseconds have not elapsed, the process returns to step 56.

C step 58] Since the mirror drive was not completed within the time, it is determined that an accident has occurred and the energization of the first motor Ml is stopped.

[Step 59] Display data is output to the DR of the display driving IC so as to display an accident, and the process jumps to step 22.

[Step 60] Now that the mirror has been raised, the mirror is lowered (shutter charge).

Therefore, timer #2 is restarted.

[Step 61] As explained in step 56, the input port P is
11 is turned on, step 61 turns on the input capo-1-
r) l1 is checked, and if the mirror down (shack churn) is completed, the process branches to step 63; 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 is energized.

If one second has elapsed, the process branches to step 58; if one second has not elapsed, the process branches to step 61.

[Step 63] Mirror down (shutter charge)
Since this has been completed normally, the first motor M1 is de-energized and jumps to step 22.

This completes the empty charging sequence.

Next, the rewinding sequence of the i13D diagram will be explained. The rewind sequence is performed when the rewind button 14 is pressed, as described in the processing flow after power supply. Furthermore, as will be described later, the film jumps when the film ends during normal winding and the winding tension state is reached.

(Step 64], C step 65) Clear flags A and C, which are used for subsequent processing, and set them to O.

[Step 66] Check the battery voltage BAT.

The method is similar to step 26 of the autoloading sequence, so details are omitted. If the battery is sufficient, go to step 68; if the voltage is low, go to step 67.

[Step 67] Send data to the DR of the display driving IC to display a warning that the voltage has dropped,
After that, the process branches to step 22 and the process ends.

[Step 68] It is checked whether the movable mirror is in the phase where it is down (shutter charging completed), and if the mirror is correctly down (shutter charging completed), the process branches to step 76.

If the movable mirror is not correctly down (if it is stopped midway (shutter charge is stopped midway), the process branches to step 69.

[Step 69] The first motor M1 is rotated in the normal direction to lower the movable mirror to the correct position (to complete the shutter 7).

[Step 70] Start a timer for counting the energization time of the first motor Ml.

[Step 71] As explained in step 56, input port p
Since the switch H is turned off, the input port I'll is checked in step 71, and if the mirror down (shutter charge) is completed, the process goes to step 75, and if the mirror down (shutter charge) is not completed, the process goes to step 72. Branch to.

[Step 72] Check the timer that measures the time since the first motor Ml is energized. If one second has elapsed, the process returns to step 73; if one second has not elapsed, the process returns to step 71.

[Step 57] Since the mirror drive was not completed within the second second, it is determined that an accident has occurred and the energization of the motor Ml is stopped.

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

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

Thereafter, the process proceeds to step 76.

[Step 76] 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 (fleet the spool 401 as non-meshing), start reverse rotation of the second motor M2. .

[Step 77] Wait 10,059 seconds to ensure that the spool-side planetary gear 411 is released.

[Step 78] First motor M for rewinding
Start the reversal of 1. That is, as shown in FIG. 5(b), the sun gear 104 is rotated clockwise to engage the planetary gear 105 and the rewind gear 201, and then the rewind gear 201 is rotated.

[Step 79] Start a timer that counts the energization time of the first motor M1.

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

When flag A is 0, the previous state of input port P9 is stored as being switched on, and when flag A is 1, the previous state of input port 119 is stored as being switched off.

The signal input to the input port P9 is a signal linked to the sprocket 402 as described above, and is turned on and off multiple times (for example, 12 times) while rewinding the film-sternum. If the OFF signal is repeatedly input, the microcomputer MC2 determines that the sprocket 402 is rotating, and if the repeated ON/OFF signal is stopped, the microcomputer MC2 determines that the sprocket 402 has stopped. At step 80, flag A is 1.
If flag A is O, the process branches to step 81.

[Step 81] Compare the previous state and current state of input port P9. If it has changed, the process branches to step 82; if it has not changed, the process branches to step 86.

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

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

(Step 84) Since the input state of input port P9 has changed, 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 that counts the energization time of the first motor Ml, and if there is no change in the input port for 350 milliseconds, it is determined that the sprocket 402 is stopped, and the process proceeds to step 87. , 350 milliseconds have not yet elapsed, the process branches to step 90.

[Step 87] Stop energizing both motors Ml and M2. Thereafter, the process proceeds to step 88.

[Step 88] Check whether rewinding is completely completed. If the frame counter is O, 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 rewinding has stopped midway is sent to the display driving IC DR, and the process branches to step 22 to end the process.

[Step 90] Check flag C, which is a flag for storing the previous state of input port 1-I"10. When flag C is O, the previous state of input port PIO is memorized as a switch-on state. , when flag C is 1, the state of the previous input port PIO is memorized as the switch-off state.The signal input to the input port PIO is a signal linked to the sprocket 402 as described above, and is The switch is turned on when the rewinding corresponding to the sternum piece is completed.

Also, if you continue rewinding the next frame of the film, it will turn off immediately, and it will turn on again when the rewinding of the next frame is completed. Therefore, by detecting this signal, the microcomputer MC2 can control film winding. In step 90, if the flag C is 1, the process branches to step 93, and if the flag C is 0, the process branches to step 91.

[Step 911 Compare the previous state of the port P10 with the current state. If it has changed, the process advances to step 92; if it has not changed, the process returns to step 80 and continues rewinding.

[Step 92] Since the input state of the input port PIO has changed, the flag C is newly set to 1. Then step 80
and then continue rewinding.

[Step 93] The previous state of the manual port PIO is compared with the current state. If it has changed, the process advances to step 94; if it has not changed, the process returns to step 80 and continues rewinding.

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

[Step 95] Since the signal at the input port PIO has been switched from off to on, rewinding for one frame has been completed, and the memory counting the number of frames is subtracted. Thereafter, the process returns to step 80 and continues rewinding.

Next, the release sequence shown in FIG. 13E will be explained. As explained in the processing flow after power supply, the release sequence performs processing when the release enable button 12 is pressed.

[Step 96] Communication is performed with the AD converter AD2, and the photometry AI) conversion value is read.

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

[Step 98] Perform a voltage check. The voltage is checked, and if the voltage has dropped, the process branches to step 99, and if the voltage is such that it can be released, the process branches to step 100. The voltage check here only looks at whether or not the release can be performed. For example, when the voltage value vo is less than 3 volts, the process branches to step 99, and when Vo>3 volts, the process branches to step 99.

[Step 99] Display data is sent to the DR of the display driving IC to display a warning that the voltage has decreased.

[Step 100] Check the voltage again. The voltage is checked, and if the voltage is quite high, the process branches to step 101, and if the voltage is not so high, the process branches to step 102. The voltage check here is to determine whether or not the release can be performed, but superimposed energization to the motor can be performed in subsequent operations, for example, the voltage value (■). However, when V D >4 volts, the process branches to step 102, and when V D >4 volts, the process branches to step 101.

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

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

[Step 103] In order to raise the mirror, the first
The motor M1 starts to be energized in the forward direction.

[Step 104] Start timer #2, which is a timer that counts the energization time of the first motor Ml.

[Step 105] Wait 15 milliseconds until the rush current at the start of energization subsides.

[Step 106] Flag E, which is a flag storing the high/low voltage state, is checked. If the voltage is high, the process branches to step 108, and if the voltage is low, the process branches to step 107.

[Step 107] If the voltage is slightly low, wait an additional 15 milliseconds for the rush current to recover.

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

[Step 109] Check the input port pH,
If the mirror up is completed, the process branches to step 111; if the mirror up is not completed, the process branches to step 110.

[Step 110] Check the timer that measures the time since the first motor M1 is energized.

If 500 milliseconds have elapsed, go to step 112; 5
If 00 milliseconds have not elapsed, the process returns to step 109 and waits until the mirror up is completed.

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

[Step 113] Display data is output to the DR of the display driving IC to indicate an accident, and the process branches to step 22 to end the process.

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

Next, in steps 200 to 203, a case will be described in which the overrun amount of the first motor Ml becomes equal to or greater than a predetermined amount when the mirror up is completed.

[Step 200] Wait 3 milliseconds to allow time for overrun.

[Step 201] Check the input port P12. As described in detail in the explanation of the empty charging sequence (Fig. 13C) above, if the overrun amount when mirror up is completed is within the set range, input port P12 is turned on and the process branches to step 114 to perform normal operation. However, when the overrun amount exceeds the set range, the input capacitor PI3 is turned off and the process branches to step 202 as an abnormal state avoidance sequence. Here, to explain the problem when the overrun counterfeit exceeds the set range, that is, the mirror drive gear 1
20 further rotates in the direction of force at time i+,
In the worst case, 1 on the flat cam surface of the mirror drive cam 121.
21b and the one end 131 of the mirror drive lever 130 come out of sliding contact, and the one end 131 comes into sliding contact with the downward cam 121c, causing the movable mirror 70 to rotate in the downward direction (direction of the viewfinder observation position). A problem arises in that the film 52 cannot be properly exposed.

[Step 202] The first motor M1 is energized again in the normal rotation direction. As a result, the mirror drive gear 120 rotates clockwise again, and the movable mirror 70 rotates by sliding between the mirror drive cam 121 and the mirror drive lever 130.
mirrors down once and then continuously mirrors up again. Further, the shutter charge gear 140 also rotates counterclockwise again, causing the shutter charge lever 150 to rotate for charging and for releasing the churn. However, even if the shutter charge lever 150 rotates again in this state, the shutter unit 300 will only be charged empty and will not be adversely affected in any way.

[Step 203] Wait for 50 milliseconds, which is the time required for the brush 122 shown in FIG. 4 to slide at least on the operation completion detection pattern 162, before the first motor Ml is operated again. And then again ゛ Step 10
Returning to step 9, when the mirror up is completed (the input port pH is off), the rotation of the first motor Ml is stopped in step 111. In this state, if the overrun amount falls within the set range, the process advances to step 114.

[Step 114] Communicate with lens microcomputer MC3,
Check whether the aperture has been stopped down to a predetermined position, and if the aperture blades 530 have been stopped down to the predetermined position, step 115
If the aperture has not been completed, the process returns to step 114 and waits until the aperture blades 530 are apertured.

[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 front curtain of the shutter, causing the front end of the shutter to run. This starts the film exposure operation.

[Step 116] Waiting for film exposure time.

[Step +17) A low level signal is output from the output capo-1-PI3 for 10 milliseconds, and the coil 389 of the electromagnet for controlling the shutter trailing curtain is energized to run the shutter curtain. This completes the film exposure operation.

[Step 118] Switch S linked to completion of rear toad travel
Determine whether CN 2 is on or off. If it is off, the process remains at step 118 and waits until the switch is turned on. If it is on, it means that the trailing curtain has completed running, so the process branches to step 119.

[Step 119] The flag E, which is a flag storing the high/low voltage state, is checked. If the voltage is high, the process branches to step 123, and if the voltage is slightly low, the process branches to step 123.

[Step 120] Check the voltage again. This voltage check has the same meaning as the voltage check in step 100, and the result is that when the voltage is high (for example, V.
If the voltage is low (for example, 4 volts), the process branches to step 122. As mentioned above, check the voltage between the front curtain coil and lG31. ．． The trailing curtain coil MG32 is simultaneously energized for 10 milliseconds, and the voltage during energization is checked.

[Step 121] Flag E is set to 1 to indicate that the voltage is high.

[Step 122] Flag E is set to O to indicate that the voltage is slightly low.

[Step 123] In order to lower the mirror and charge the shutter, the first motor Ml is started to be energized for normal rotation.

[Step 124] Start timer #2, which is a timer that counts the energization time of the first motor Ml.

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

[Step 126] The flag E, which is a flag storing the high/low voltage state, is checked. If the voltage is high, the process branches to step 128, and if the voltage is slightly low, the process branches to step +27.

[Step 127] When the voltage is a little low, an additional 15 milliseconds is added to the recovery of the rush current.

[Step 128] The microcomputer MC3 on the lens side is commanded to return the aperture blade 530 of the lens to the open position.

[Step 129] Communicate with lens microcomputer MC3,
It is checked whether the diaphragm has been returned to the open position, and if the diaphragm blades 530 are open, the process goes to step 130, and if the diaphragm is not open, the process returns to step 129 and waits until the diaphragm is opened.

[Step 130] The second motor M2 is energized in the forward rotation direction to wind up the film-sternum.

[Step 131] Start a timer #l that counts the energization time of the second motor M2.

[Step 132] to [Step 135] Clear the discrimination flags used in the following processing, and set A=O, B=O.

Let C=Q and F=0.

[Step 136] Check the input state of input capo-1-pH. If the input status is on, it means that the mirror has finished lowering and the shutter has finished charging, so step 1
If it is off, the process branches to step 142 because the mirror has not been completely down.

[Step 137] Mirror down (shutter charge)
is completed, the first motor M1 is stopped.

[Step 138] Check the flag B that stores whether only the first motor M1 for mirror drive (shutter charge) is operating or whether the second motor M2 for winding is also operating at the same time. If flag B is 0, the process branches to step 151, and if flag B is 1, the process branches to step 1'39.

[Step 139] Set the status flag B to 0.

[Step 140] The fact that the status flag B is 1 means that the second hoisting motor M2 is temporarily stopped. In step 140, the second winding motor M2 is energized again.

[Step 141] The timer #1, which counts the energization time of the second winding motor M2, is restarted.

Thereafter, the process branches to step 151.

[Step 142] Check the timer #2 that counts the energization time of the first motor Ml for driving the mirror, and if 1 second has elapsed, proceed to step 143; branches to 145.

[Step 143] First motor Ml for driving the mirror
Since one second has passed without the mirror down or shutter charging being completed, the first motor Ml for the curling beard is stopped once, and only the first motor Ml is operated independently, and the mirror down and the shutter charging are not completed. Only the shutter charge is performed first. At this time, if the second winding motor M2 has already stopped, the process branches to step 146.

[Step 144] Check the flag E that stores the high/low state of the '74 battery voltage BAT, and if the voltage is high, set it to 1.
Branch to 46.

[Step 145] Determining the status flag B When the status flag B is 11, that is, the first motor M1 for driving the mirror is in operation, 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 hoisting motor M2 is also operating at the same time, the process branches to step 20.1.

[Step 146] The second winding motor M2 and the mirror driving first motor Ml are de-energized.

[Step 147] Since charging has stopped midway through the DR of the display driving IC, display data is sent to display an accident display.

[Step 148] A second winding motor M2;
Since simultaneous driving with the first motor M1 for driving the mirror could not be performed, the second motor M2 for sweeping up the mirror is stopped.

[Step 149] First motor Ml for driving the mirror
Restart timer #2, which counts the energization time.

[Step 150] Set status flag B to 1, and motor Ml
.

Since it was not possible to energize M2 simultaneously, it is remembered that the energization of the second hoisting motor M2 was stopped.

Thereafter, the process returns to step 136 and continues to detect the completion of mirror down (shutter charging).

[Step 204] It is checked whether the first motor Ml for driving the mirror (shutter charge) is in operation, and if it is in a stopped state, the process branches to step 151, and if it is in an operating state, it branches to step 154. This step 2011 is an abnormal state avoidance sequence in subsequent steps 205 to 208, in which the first motor M+ for driving the mirror is rotated one more rotation in the event of an abnormality, and as a result, the operation of the second motor M2 for winding is completed. This step was inserted because the first motor Ml for mirror driving (charging) may be finished later.

[Step 151] Check whether the second hoisting motor M2 is operating or stopped. If it is operating, the process branches to step 154; if it has stopped, the process branches to step 152.

[Step 152] Check the memory F that stores how many times the input signal of the input port P9 is switched on and off while winding one frame. If the film is switched only four times or less while winding one frame, the film will be switched immediately (or at the same time) after the second motor M2 was stopped by the l-frame winding completion signal (input port PIO) during the previous winding. is pushing forward,
When the driving force of the second motor M2 disappears, it is determined that the sprocket 402 has returned a little in the return direction, and the process returns to the wind mode (step 64) as 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 explained in more detail.

It is well known that the length of the 71' lume 52 varies depending on the manufacturer and the winter type.For example, it is well known that even if the film is made to take 24 shots, it can actually take 25 shots. This problem also occurs due to variations in the amount of blank feed during autoloading.

Also, since the base of the film 52 itself is a synthetic resin sheet,
It is also known that it can be slightly elongated by stretching. Therefore, even if it is possible to wind one frame of the film 52 near the final photographable frame of the film 52, the film 52 is actually stretched slightly before the winding of one frame is completed (the cartridge shaft of the film cartridge 50 All of the film 52 wound around the cartridge 51 is fed in the direction of the spool 401, and even if an attempt is made to wind up the film 52 by the rotation of the spool 401, the film 52 cannot be pulled out from the cartridge 50. In some cases, the reason why the film 52 was able to be wound evenly is because the film 52 was stretched. In such a case, the second motor M
When the winding driving force of the spool 401 is lost at the stop of step 2, the film 52 shrinks due to its own return force, and the sprocket 402 rotates slightly in the rewinding direction due to engagement with the film perforation 54. . Therefore, the next time the winding for the next piece is carried out,
■Before winding evenly, a 1-frame winding completion signal is input to the input port PIO, and even though the proper 1-frame winding has not actually been performed, the output signal is 1-frame.
In some cases, a signal was generated indicating that the piece had been wound. In the conventional sequence, shooting is OK even in such a case, but the next exposure is of the sternum, resulting in a double exposure that was not intended by the photographer, or the film does not stick out no matter how many times the film is wound. Tension (finish of film)
This caused a problem in which it was not possible to detect the Step 152 of this embodiment is a step inserted in order to solve the above-mentioned conventional problem. The on/off switching signal to port P9 is output a predetermined number of times (in the example, this predetermined number is set to 4 times, but theoretically, the on/off switching signal that is output when winding one frame under normal conditions) If the film 52 does not reach the predetermined number (it is sufficient to set a number smaller than the number), it is determined that the film 52 is already in a stretched state, and the conventional method is performed by jumping to the auto rewind mode (step 64) step for rewinding. Problem solved.

Next, a case will be described in which the overrun amount of the first motor Ml at the time of completion of shutter charging (mirror down) in steps 205 to 208 is equal to or greater than a predetermined amount.

[Step 205] Check the input port P12. As described in detail in the explanation of the empty charge sequence (FIG. 13C) above, if the overrun amount at the time of completion of shutter churn (mirror down) is within a predetermined range, input port P12 is turned off and the process proceeds to step 153. The sequence branches to a normal sequence, but when the overrun amount exceeds the set range, the input port P12 is turned on and the sequence branches to step 206 as an abnormal condition avoidance sequence.

Here, to explain the problem when the overrun amount exceeds the set range, that is, the mirror drive gear 120 may rotate further clockwise than the state shown in FIG. 3(a). In the worst case, mirror drive cam 1
21 and one end 131 of the mirror drive lever 130, the movable mirror 70 rotates in the upward direction (toward the exposure retracted position), making it impossible to obtain a proper viewfinder observation state. This also causes problems such as the inability of the subject light to properly enter the AF light-receiving element (not shown). Also, of course, shutter charge gear 1
40 may also rotate further counterclockwise,
In the worst case, the flat cam surface 141b of the shutter charge cam 141 and the roller 15 of the shutter charge lever 150
The sliding contact with 1 is removed, and the cam 151 descends to the cam surface 141c.
Correspondingly, the shutter charge lever 150 rotates in the charge release direction (clockwise), and the charge lever 302 of the shutter unit 300 loses its tension before the shutter runs, reducing the shock resistance performance of the shutter unit 300. This may cause problems.

[Step 206] The first motor Ml is energized again in the normal rotation direction. As a result, the mirror drive gear 120 rotates clockwise again, and the movable mirror 70 rotates by sliding between the mirror drive cam 121 and the mirror drive lever 130.
mirrors up once and then continuously mirrors down again. Further, the shutter charge gear 140 also rotates counterclockwise again, causing the shutter charge lever 150 to rotate to release the charge and rotate to charge. However, even if the shutter charge lever 150 rotates again in this state, the shutter unit 300 will not be adversely affected at all.

[Step 207] When the first motor M1 is restarted, the brush 122 shown in FIG.
Wait 5 milliseconds.

[Step 208] Mirror drive (shutter charge)
The motor #2, which is counting the energization time of the first motor Ml, is restarted.

Then, go back to step 136 and step 13.
Repeat steps 6 and below.

[Step 153] Display data is sent to the DR of the display driving IC to indicate that one frame winding has been completed and the normal shutter charging operation has been completed, and the process branches to step 22 to end the process.

[Step 154] The previous state of the input port P9 is memorized (check the flag A). When the flag A is O, the previous state of the input port P9 is memorized as the switch-on state, and the flag A is 1 is the previous entry capo)P
The state of 9 is memorized as the switch-off state. As mentioned above, the signal input to P9 is a signal that is linked to the sprocket 402, and is input to a signal that repeats on and off multiple times (for example, 12 times) while winding one sternum with the film. If the OFF signal is repeatedly input, the microcomputer MC2 determines that the sprocket 402 is rotating, and if the repeated ON/OFF signal is stopped, the microcomputer MC2 determines that the sprocket 402 has stopped. In step 154, when the flag A is 1, the process branches to step 157, and when the flag A is O, the process branches to step 155.

Immediately after the feeding sequence operation, flag A is set to 0 in step 132, so the process branches to step 155.

[Step 155] Compare the previous state and current state of input port P9. If it has changed, step 156
If there is no change, the process branches to step 161.

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

[Step 157] Similar to step 156, compare the previous state and current state of input port P9. If there is a change, proceed to step 158; if not, proceed to step +6
Branch to 1.

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

[Step 159] Count the energization time of the second motor M2 and restart the timer #l from the beginning.

[Step 1613 Since there was no change in the port P9, check the timer that counts the energization time of the second motor M2. If there is no change in the input port for 350 milliseconds, the sprocket 402 has stopped. If it is determined that it is, the process goes to step 167, and if the 350 milliseconds have not yet elapsed, the process goes to step 162.

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

[Step 162] Flag C, which is a flag for storing the previous state of PIO, is checked. When the flag C is 0, the previous state of the input port PIO is stored as a switch-on state, and when the flag C is 1, the previous state of the input port PIO is stored as a switch-off state.

Note that the signal input to the input port PIO is a signal linked to the sprocket 402, and the switch is turned on when winding corresponding to the film-sternum is completed. Also, it is turned off immediately when winding of the next film frame is started, and turned on again when winding is completed. Therefore, by detecting this signal, the microcomputer MC2 can control film winding. In step 162, if flag C is 1, the process goes to step 165;
When flag C is 0, the process branches to step 163. Immediately after the winding operation, the flag C is set to 0 in step 134, so the process branches to step 163.

[Step 163] The previous state of input port PIO and
Compare with the current state. If it has changed, step 16
If there is no change, the process returns to step 136 to continue detecting mirror down and winding completion.

[Step 164] Input Capo) Since the input state of PIO has changed, flag C is newly set to 1. After that, return to step 136, mirror down (shutter charge completed)
and continues to detect the completion of winding.

[Step 165] The previous state of input port PIO and
Compare with the current state. If it has changed, step 16
6, and if there is no change, return to step 136.

[Step 166] Since the signal at the input port PIO has been switched from OFF to ON, it means that the winding of one sternum has been completed, the second motor M2 is de-energized, and the film counter is incremented.

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

[Step 168] Check flag E, which is a flag that stores the voltage level. If the voltage is high, proceed to step 169; if the voltage is slightly low, proceed to step 169.
, step 148 to stop simultaneous energization of M2.
Return to

[Step 169] Stop energizing motors Ml and M2,
Proceed to the rewind sequence described above.

[Step 175] Flag Z of E2FROM is checked to determine whether automatic rewinding is to be performed or prohibited.

If the flag Z is 1, automatic rewinding is performed, so the process branches to the above-mentioned rewinding sequence. On the other hand, if flag Z is O, automatic rewinding is prohibited, so the process branches to step 22.

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

Next, a flowchart of the lens microcomputer MC3 will be explained.

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

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

[Step 171] Determine whether or not the communication result with the camera side microcomputer MC2 is an aperture drive command from the camera side. If it is determined that it is an aperture drive command, step! If not, the process branches to step 173.

[Step 172] Third motor M3 for driving aperture blades
is energized in the normal rotation direction (counterclockwise in FIG. 10) to narrow the aperture to a predetermined position. Since the aperture value is sent from the camera during communication, it is only necessary to turn on the power for a 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] Determine whether the communication result with the camera side microcomputer is an aperture open command from the camera side. If it is determined that it is an aperture open command, proceed to step 174; otherwise, return to step 170. , camera side microcomputer M
Waits for the next command from C2.

[Step 174] Third motor M3 for driving aperture blades
is energized in the reverse direction (clockwise in Fig. 1O) for a predetermined period of time, and the aperture is opened. Thereafter, the process returns to step 170 and waits for an instruction from the camera side microcomputer MC2.

The above is the flowchart of the lens microcomputer MC3.

Here, an outline of the camera sequence in the case of normal operation in this embodiment will be described.

Load a new film cartridge 50 into the camera,
Autoloading starts by closing the back cover 430. That is, first, the second motor M for winding
In this state, both the spool 401 and the sprocket 402 are rotated using the second motor M2 as a driving source, and the film league portion 56 is sent to the spool 401 and wound. Thereafter, the second motor M2 is once reversed, the clutch is switched, the sprocket 402 is freed, and the drive is switched to the spool drive. Then, the second motor M2 is rotated in the normal direction again for about one frame, and it is checked whether the autoloading is successful. In other words, when the sprocket is free,
By rotating the spool 401, the sprocket 4
02 is rotated by the film 52, it can be confirmed that the leader portion 56 of the film 52 is wound around the spool 401, and it can be determined that the autoloading has been successful. Up to this point, the film-feeding operation for auto-loading has been completed, and the second motor M for winding has been activated.
The rotation of No. 2 is stopped and the state is in standby for the next release operation.

By operating the release button 12, the first motor M1 for mirror drive and shutter charging rotates forward by a predetermined amount, moves the movable mirror 70 up (to the exposure retracted position), and puts the shutter unit 300 in the uncharged state. The charge lever 3 in the unit, which until now had a tensioning function to prevent the shutter from moving incorrectly,
Move 02 to release the tension.

At the same time, the third motor M3 for driving the aperture is rotated forward by a predetermined amount to perform the aperture narrowing operation to the set value. and,
The leading blade group 3 is energized by energizing the coil 383 of the leading blade control electromagnet.
52 is run to start exposure, and after a set number of seconds, the coil 389 of the trailing blade control electromagnet is energized to run the trailing blade group 351 to end the exposure.

After the completion of exposure is confirmed, the first motor Ml is again rotated by a predetermined amount in the normal rotation direction in the same direction as the mirror up, the movable mirror 70 is moved down (to the viewfinder observation position), and the shutter unit 300 is closed. Charge is driven, and at the same time, the charge lever 302 for preventing erroneous shutter movement is held at the tension position. Also, at approximately the same time, the second winding motor M2 is rotated in the normal direction by the amount of winding one frame. Furthermore, the third motor M3 for driving the diaphragm is reversely rotated to return the diaphragm to the open state. In this state, the next release operation is awaited.

Based on the above-mentioned release operation (the exposure operation is repeated and when all the frames of the film have been photographed, the film 52 is stretched when the film 52 is wound, and this state is maintained by the rotating board 420 which rotates in conjunction with the sprocket 402). When it is detected that the rotation has stopped, the first motor Ml for driving the mirror and charging the shutter is first rotated in the normal rotation direction until the mirror is down and the shutter charging is completed.

Then, after the second winding motor M2 is stopped,
The rotation is reversed to disconnect the transmission system between the second motor M2 and the spool 401, freeing the spool 401 and reducing the unwinding load. The first motor Ml used for the mirror drive and shutter charge will now be reversed, and the transmission system of the first motor M1 will be changed from the conventional mirror drive and shutter charge transmission system to the rewind transmission system. Then, the rewind gear 201 of the rewind transmission system is rotated in the rewind direction. At the end of rewinding, film 5
When only a portion of the film leader 56 is slightly protruding from the film cartridge 50 in order for all of the film 2 to return to the film cartridge 50, the driven rotation of the sprocket 402 by the film 52 stops, and based on this detection, the first motor The camera sequence ends by stopping all operations including M1.

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

FIG. 15 shows another rotating substrate 420 in place of the rotating substrate 420 of the film winding drive mechanism 400 of FIG. 8 in the above embodiment.
′ is used, and the change is that this rotating board 420′
This is because a part of the second pattern portion 420b is deleted to form a film all-frame winding completion detection area 450 from a different perspective. That is, in this region 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. third for
The sliding brush 424 is on the sliding trajectory just before it comes into sliding contact with the pattern 420c. As a result, as the spool 401 rotates in the winding direction (clockwise), the sprocket 402 rotates as a result of the movement of the film 52, and the sliding brush 423 comes into sliding contact with the third pattern section 420C, and the l frame When the second motor M2 is controlled to stop by generating a winding completion signal (input to the input port PIO in FIG. When they match, the film 52 itself shrinks slightly due to the removal of the tensile load caused by the motor drive, and when the sprocket 402 is slightly driven in the rewinding direction (counterclockwise), the sliding brush 424 comes into sliding contact. The above completion detection area 11 is added to the area.
50 is calculated to match.

Next, FIG. 16 will be explained. FIG. 16 is a flowchart in which a part of FIG. 13E showing the release sequence in the above-mentioned embodiment is changed, and the change is that step 135 in the above-mentioned embodiment is deleted and step 30
0 was inserted, step 152 was deleted, and step 301 was inserted in its place. Everything else is the same. To explain specifically the inserted steps, step 300 clears the new discrimination flag G and sets G=O. In other words, this determination flag G is used to remember whether the input signal of the input port P9 (multiple on/off switching signals when winding one frame is input) has output an on/off switching signal even once. 1
When an on/off switching signal is input to input capo P9 even once, G=1, and when no on/off switching signal is input even once, G=O is held.

Step 301 checks the memory G (discrimination flag G). Here, the state of G=O remains, that is, ■
During frame winding, no on/off switching signal was input to the input port P9 even once, and the sliding brush 424 shown in FIG. 15 was in sliding contact with the film all frame winding completion detection area 450. After rotating slightly from the state, the sliding brush 423 comes into sliding contact with the third pattern 420c, and the 1
This means that a piece winding completion signal has been output. This is a signal (
Immediately (or simultaneously) after being stopped by input port PIO).

This means that the film tensed at the time when the second motor M2 lost its driving force, and the sprocket 402 returned a little in the rewinding direction (due to the shrinkage of the film 52). At this time, the process jumps to rewind mode (step 64).

On the other hand, when G=1, it is determined that proper l-frame winding has been performed, and the process branches to step 205.

Next, referring to FIG. 17, still another embodiment of the present invention will be described.

FIG. 17 is a flowchart showing the release sequence in the embodiment of FIGS. 1 to 14 described above, in which a part of FIG. 13E is modified. This is because steps 310 and 311 were inserted, and step 152 was deleted and steps 320 to 322 were inserted in its place. Everything else is the same.

To specifically explain the inserted steps, step 310. 311 is a timer #4 for detecting a peculiar film tension state which will be described later. #, 5 is the step to start, and timer #4 here is the power supply battery DAT.
The timer #5 is set to one hour, for example 400 milliseconds, when the voltage is quite high (flag E = 1), while timer #5 is set to a time when the voltage is somewhat low (flag E = 1).
0) is a timer set for one hour, for example 500 milliseconds.

Step 320 checks what state the current voltage value of the power supply battery BAT is in, and if E=1, step 3
If E=0, the process branches to step 322.

Steps 321 and 322 are steps for determining a unique film tension state, and step 321
Since the flag E = 1, the voltage of the power supply battery DAT is quite high, so the second motor M2 is expected to rotate at high speed. Check #4, and if there is no change in the large frame port PIO for 400 milliseconds, it is assumed that normal winding is being performed, and the process branches to step 205. When there is a completion signal (input), it is detected that a peculiar film tension has occurred and auto-rewind is performed (step 64).
Jump to.

Also, in step 322, since the flag E=O, the voltage of the power supply battery iAT is slightly low, so it is predicted that the second motor M2 will rotate at a slightly low speed, and here the energization time of the second motor M2 is determined. Check timer #5 which is counting, and if there is no change in PTO for 500 milliseconds, it is assumed that normal winding is being performed and proceed to step 2.
05, and if there is a change in the input port PIO (input of l-frame winding completion signal) within 500 milliseconds, it is detected that a peculiar film tension has occurred and auto-rewind is performed (step 64). Jump to.

Now, to explain the above-mentioned peculiar film tension, this is because during the previous winding, the second motor M2 was stopped by the one-frame winding completion signal (input port PIO). The second
When the driving force of motor M2 was lost, the sprocket 402 moved back a little in the rewinding direction (film 5
(by contraction of 2). Therefore, in this state, even if the 1-frame winding completion signal (input port P10) is generated during the next winding, the sternum will not be hoisted properly, and it will be determined that the film is stretched and the automatic It is better to handle rewind, otherwise,
The same frame will be exposed over and over again.

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

The rotation of the second motor M2 is caused by the film winding drive mechanism 40.
0 and winds up the film 52.

The rotation of the second motor M2 is controlled by the motor control circuit 62.
0, and actually the shutter unit has completed its travel (
The second motor M2 is driven in the winding direction by inputting the shutter trailing curtain travel completion signal. ■The frame detection means 600 detects the rotational state of the sprocket 402 of the film winding drive mechanism 400, and the sprocket 402
2, a one-frame winding completion signal is output to the motor control circuit 620 in a state where the film is driven by one frame, and the motor control circuit 620 receives the signal and controls the second motor M2 to stop. ' All frame winding completion detection means 610 are the same (sprocket 4
02 is an on/off switching signal representing film movement by the film 52 (multiple times during sternum winding,
If the on/off switching signal (configured so that an on/off switching signal is generated) does not occur within a predetermined period of time, a film tension (all frames of film winding complete) signal is output to the motor control circuit 62G and other rewinding means. do. The motor control circuit 620 receives the above signal and controls the second motor M2 to stop.

Here, the all-frame winding completion detection means 610 can also detect a peculiar film tension. In the embodiment, three types of detection methods for this unique film tension were explained, so each type will be explained separately here as well.

[First method] This method corresponds to the embodiments 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 less than a predetermined number. However, when a one-frame film winding completion signal is output, it is determined that film tension has already occurred near the time when winding of the previous frame is completed, and a film tension signal is output.

[Second method] This method corresponds to the embodiment shown in FIGS. 15 and 16, and it is possible to wind one frame of the film even though the on/off switching signal indicating the film movement described above is not generated even once. If the completion signal is output, it is determined that the film tension has already occurred during winding of the front frame in this state as well, and a film tension signal is output.

[Third method] This corresponds to the embodiment shown in FIG. 17, and the one frame winding completion signal of the film is received within a predetermined time from when the second motor M2 is started to be driven to wind the film. In this case, it is determined that film tension has already occurred when the front frame is wound, and a film tension signal is output.

(Effects of the Invention) As described above, the present invention has a configuration in which the index for winding one frame of film is detected by a signal indicating completion of winding of one frame of film, and even if the signal is generated, the previous frame is not wound. It is possible to provide an electrically driven camera that prevents illegal multiple exposure by detecting that the film is stretched (a state in which all frames have been completely wound) near the time when the film is stretched.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the arrangement of each component of an electrically driven camera as an embodiment of the present invention. FIG. 2 is an exploded perspective view of essential parts of each structure shown in FIG. 3(a) and 3(b) are explanatory views of the operation of the mirror box drive mechanism and film rewind drive mechanism shown in FIG. 2. FIGS. 4(a) and 4(b) are operation explanatory diagrams of only the phase detection configuration shown in FIG. 3. 5(a) and 5(b) are operation explanatory diagrams of the transmission switching configuration in FIG. 3. FIGS. 6(a) and 6(b) are operation explanatory diagrams showing the main part configuration of the shutter unit. FIG. 7 is a perspective view showing the travel control mechanism of the shutter configuration of FIG. 6. FIG. 8 is a perspective view showing the structure of the film winding mechanism shown in FIG. 2. 9(a) to 9(e) are operation explanatory diagrams showing the operation of the film winding mechanism of FIG. 8. FIG. 10 is a t1 perspective view showing the aperture drive configuration within the photographic lens. FIG. 11 is a circuit diagram for controlling the operation of each mechanism. FIG. 12 is a flowchart for explaining the operation of the circuit shown in FIG. 11. 13A to 13E are flowcharts for explaining the operation of the circuit shown in FIG. 11. FIG. 14 is a flowchart for explaining the operation of the circuit shown in FIG. 11. FIG. 15 is a perspective view of a main part of a film winding drive mechanism showing another embodiment of the present invention. FIG. 16 is a flowchart showing another embodiment, FIG. 17 is a flowchart showing still another embodiment of the present invention, and FIG. 18 is a block diagram for explaining the characteristic operation of the embodiment corresponding to the present invention. figure. 40・・・・・・・・・・・・・・・・・・・・・
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・・・・・・Camera body, 60・・・・・・・・・・・・
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・・・・・・・・・Mirror box, 70・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・Movable mirror, 100 ・・・・・・・・・・・・・・・・・・
...Mirror box drive mechanism, 200...
・・・・・・・・・・・・・・・・・・Film rewind drive mechanism, 300 ・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
Shutter unit, 400・・・・・・・・・・・・
・・・・・・・・・・・・Film winding drive mechanism, M
l・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・First motor, M2・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
...Second motor, M3...
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・Third motor.

Claims (3)

[Claims] (1) A film winding drive mechanism that drives the film in the winding direction, a motor that serves as a drive source for the film winding drive mechanism, and a detection means that detects the completion of winding of all frames of the film and generates a winding completion signal. The detection means electrically detects, as a signal output, a corresponding positional displacement between a rotating member that rotates following the winding movement of the film and a fixed member, and completes the winding movement of one frame of the film. A detection configuration is provided which can obtain a first signal to be outputted by this and a second signal to be outputted multiple times while the film is wound up and moved by one frame.
A detection circuit is provided that detects how many times the second signal is generated in the signal generation interval and generates the winding completion signal when the number of the second signals is less than a predetermined number. An electrically driven camera featuring: (2) a film winding drive mechanism that drives the film in the winding direction; a motor that serves as a drive source for the film winding drive mechanism; and a detection means that detects the completion of winding of all frames of the film and generates a winding completion signal. The detection means electrically detects, as a signal output, a corresponding positional displacement between a rotating member that rotates following the winding movement of the film and a fixed member, and completes the winding movement of one frame of the film. The first signal outputted by this process and the second signal outputted just before the film is wound up and moved by one frame.
and a third signal output during film winding, and the third signal is not generated during the generation interval of the first signal, and the second signal is outputted during the winding of the film. 1. An electrically driven camera characterized in that a detection circuit is provided that generates the winding completion signal when a winding completion signal occurs. (3) a film winding drive mechanism that drives the film in the winding direction; a motor that serves as a drive source for the film winding drive mechanism; and a detection means that detects the completion of winding of all frames of the film and generates a winding completion signal. The detection means electrically detects, as a signal output, a corresponding positional displacement between a rotating member that rotates following the winding movement of the film and a fixed member, and completes the winding movement of one frame of the film. A detection configuration is provided that can obtain a first signal to be output by detecting the time from the start of winding to generation of the first signal, and if the time is shorter than a predetermined time, the An electrically driven camera characterized by being provided with a detection circuit that generates a winding completion signal.