JPS63169630A - Motor-driven camera - Google Patents

Abstract

PURPOSE:To reduce the load at the time of rewinding operation by providing a planetary clutch which is connected with or disconnected from a winding transmission system according to the rotating direction of a motor in a film winding driving mechanism, and rotating this clutch in a disconnection direction at the time of rewinding driving. CONSTITUTION:When a film projection detecting means 730 detects the tension of a film 680, its detection signal is sent to a motor control circuit 660 and when a phase detection means 630 lowers a movable mirror 640 and a shutter charging mechanism 624 outputs a charging completion signal, a 2nd motor M2 is driven reversely first and then a 1st motor 11 is also driven reversely a slight time later. Consequently, the planetary gear of the planetary clutch 720 is disengaged from the winding transmission mechanism of a film rewinding driving mechanism 670 to eliminate the load on a driving mechanism 610 and enable the proper use of the motors for the purposes, thereby obtaining a high- performance, low-cost camera.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrically driven camera that winds and rewinds a film using a motor as a drive source.

(Prior Art) Many electrically driven cameras have been proposed in the past that use a motor as a drive source to wind up and rewind a film. Specifically, one motor is disposed within the spool, and during the winding operation, this motor is connected to the winding transmission system to perform electric winding. When the winding is completed, the rewind button is operated and the clutch is manually switched to disconnect the motor from the winding transmission system, and connect the motor to the rewind transmission system for electric rewinding. Have them do it.

With such a conventional configuration, automatic rewinding was not possible, and the transmission system was extended to virtually both ends of the camera (spool and rewinding fork) using one motor, resulting in poor transmission efficiency. It became.

Therefore, in Japanese Patent Application No. 59-110062, the present applicant provided a winding motor and a rewinding motor independently, thereby achieving automatic rewinding only by controlling the energization and improving the transmission efficiency of each transmission system. The company has filed an application for an electrically driven camera that achieves this goal.

However, in the above application, since the hoisting motor remains connected to the hoisting transmission system during unwinding, the unwinding load is large and there is a problem that unwinding cannot be performed in a short time.

(Objective of the Invention) The present invention is based on the premise of achieving automatic rewinding using only energization control and improving the transmission efficiency of each transmission system. The purpose is to provide a driving camera.

In order to achieve the above object, the present invention provides a planetary clutch in a film winding drive mechanism driven by a winding motor, which is connected to or disconnected from the winding transmission system depending on the rotational direction of the motor. Furthermore, when the rewinding motor drives the film to rewind, the chain winding motor is energized to rotate the planetary clutch in a direction that is disconnected from the winding transmission system, thereby reducing the load during rewinding. Features a motorized camera.

(Characteristics of embodiments corresponding to the present invention) Description will be made based on the block diagram of FIG. 15. The rotation of the first motor Ml is moderately decelerated by a deceleration transmission system 600, and the transmission system is switched by a planetary clutch 610.

That is, when the first motor Ml rotates in the forward direction, the planetary clutch 610 engages with the transmission system of the mirror box drive mechanism 620, and when the first motor Ml rotates in the reverse direction, the planetary clutch 610 engages with the transmission system of the film rewind drive mechanism 700. The drive transmission system is switched by switching the rotational direction of the first motor Ml. First, if we proceed with the discussion assuming that the first motor Ml is rotating in the normal rotation direction, the rotation of the first motor Ml is caused by the mirror drive mechanism 622 and the shutter charge mechanism 62 in the mirror box drive mechanism 620.
4.

The mirror drive mechanism 622 causes the movable mirror 640 to swing, and the shutter charge mechanism 624 causes the shutter unit 6 to swing.
50 charge drive and charge release. The phases based on the operations of both mechanisms 622 and 624 are detected by phase detection means 630, and the detection results of this means 630 are supplied to a motor control circuit 660, which controls the rotation and stop of the first motor M1. be exposed. Moreover, the mirror drive mechanism 62
2 and the shutter charge mechanism 624 are movable mirrors 640
The shutter charge release phase is obtained in the phase in which the mirror 640 is raised and the swinging to the exposure retreat position is completed, and the mirror 640 is lowered in the phase in which the shutter charge drive is completed and the swinging to the viewfinder observation position is performed. is set to obtain the phase in which the completion of

Based on release start information such as a release button operation signal, the motor control circuit 660 rotates the first motor M1 in the normal rotation direction. Then, the normal rotation of the first motor Ml is continued until the movable mirror 640 completes mirror up by the phase detection means 630 and swings to the exposure retreat position.
At that point, the motor control circuit 660 controls the first motor M.
1 stop control is performed. Further, with the first motor M1 stopped, the shutter charging mechanism 624 has reached a phase that allows the shutter charging of the shutter unit 650 to be released. Thereafter, when the shutter unit 650 performs shutter running and information indicating that the shutter trailing curtain has completed running is supplied to the motor control circuit 660, the control circuit 660 again moves the first motor M1 in the same direction, that is, in the correct direction. rotate in the direction of rotation. Due to the normal rotation of the first motor M1, the mirror drive mechanism 622 is driven again to lower the movable mirror 640, and the shutter charge mechanism 624 is also driven to charge the shutter unit 650. When the phase detection means 630 detects the phase at which the shutter charging mechanism 624 has completed shutter charging, the motor control circuit 660 performs stop control of the first motor M1. Note that, at this point, the movable mirror 640 has completed mirror down and has returned to the finder observation position.

The first release will remain in this state until the next release start information arrives.
Motor M1 is stopped. Then, each time the next release start information is generated, the above-described operation is repeated.

On the other hand, the normal rotation of the second motor M2 is caused by the planetary clutch 72.
The planetary gear No. 0 is connected to the film winding drive mechanism 670 to feed the film 680 in the winding direction.

The rotation of the second motor M2 is controlled by a motor control circuit 660. Specifically, when information indicating the completion of running of the shutter trailing curtain in the shutter unit 650 is supplied to the motor control circuit 660, the rotation of the second motor M2 is controlled by a motor control circuit 660. M2 rotates in the normal direction to wind up the film 680. When the film winding is completed and the film 680 has been wound evenly, the state is detected by the l frame detection means 690, and the detection result is supplied to the motor control circuit 660, and the second motor M2 is activated. Stop control is performed. Thereafter, each time the shutter unit 650 runs the shutter, the film winding drive mechanism 670 winds the film 680 frame by frame.

Then, when the film is wound after a predetermined frame (for example, 24 frames for a 24-shot film) has been taken, the film 680 is stretched in the middle of winding one frame. The tension of the film 680 is detected by the film tension detection means 730. That is, when winding one frame of the film 680 configured in the one-frame detection means 690, a state in which on-off signals are generated multiple times to detect movement of the film 680 is not output within a predetermined time is detected. It is determined that the film has been stretched, that is, all frames of the film have been wound.

Then, the film 6 is detected by the film tension detection means 730.
When the tension of 80 is detected, the detection signal is transmitted to the motor control circuit 660. And motor control circuit 6
Reference numeral 60 indicates a first motor Ml until it receives a signal from the phase detection means 630 indicating the phase in which the movable mirror 640 is mirror-down and the charging of the shutter charging mechanism 624 is completed.
When this signal is received, the second motor M2 is first driven in the reverse direction, and after a slight delay, the first motor M1 is driven in the reverse direction.
It also drives in reverse.

A state in which the second motor M2 rotates in the reverse direction will be described.

Due to the reverse rotation of the second motor M2, the planetary gear of the planetary clutch 720 is disconnected from the winding transmission system of the film winding drive mechanism 670, and the chain winding transmission system (including the spool) is disconnected from the winding transmission system of the film winding drive mechanism 670.
is free. Therefore, during subsequent rewinding, the film winding drive mechanism 670 is not subjected to any load.

Next, a state in which the first motor Ml rotates in the reverse direction will be described. The switching of the rotation of the first motor M1 in the reverse direction is controlled by the motor control circuit 660 as described above, but the conditions are that the rewind signal is generated by operating the rewind button, and the rotation of the film 680 as described above is performed. This is the generation of a detection signal that shows the tension (all frames have been photographed). This motor control circuit 66
0, when the first motor M1 rotates in the reverse direction, the planetary gear of the planetary clutch 610 is automatically switched to the film rewind drive mechanism 700, and the rotation of the first motor M1 is switched to the film rewind drive mechanism 700. transmitted film 6
80 is supplied in the unwinding direction. This film rewinding is continued until the rewinding completion state of the film 680 is detected by the rewinding completion detection means 710.

Then, upon completion of rewinding, the rewinding completion detection means 710
When detection information is supplied to the motor control circuit 660,
Stop control of the first motor M1 is performed.

〔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 IO indicates the camera body.

A detachable photographing lens 20 is attached to this camera body 1O. I2 is a release button, 14 is a rewind button, and 30 is a battery located at the bottom of the camera body. It should be noted that the camera body 10 has a structure that allows the battery 5o to be easily taken out from the battery storage chamber by removing a member corresponding to the battery cover so that it can be easily taken out when replacing the battery. It is configured. 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 rewind drive 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 molded from plastic. 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 box 60, and has bayonet claws 81a to 81c for bayonet connection with a lens side mount (not shown) of the photographic lens 20.

100 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 6o, 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. 400 indicates the entire film winding drive mechanism;
Although not shown in detail in FIG. 2, the entire unit is assembled into a unit at the spool chamber 43 of the camera body 40.

Next, the configuration of the mirror box 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 planetary gear 105 is configured to perform planetary motion according to the rotational direction of the sun gear 104. Specifically, the planetary gear 105 has a planetary shaft 110 as a central shaft.
and are frictionally coupled by a coil spring 111. In addition, the planetary shaft 110 and the receiver 113 loosely fitted to the boss 114 of the main plate 101, which is the central axis of the sun gear 104,
They 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 then It moves around the hebos 114 as the center of revolution and meshes with the transmission gear 106. And planetary gear 1
05 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).
The planetary gear 105 (clockwise rotation) rotates and transfers to the transmission gear 1.
06 to transmit the rotation of the first motor Ml.

Conversely, as can be understood from the operation diagram in FIG. 5(b), when the sun gear 104 rotates clockwise, the planetary gear 105 first revolves clockwise, and the winding as the unwinding transmission system described later. The return gear 201 moves with the hebos 114 as the center of revolution,
It meshes with the rewind gear 201.

When the planetary gear 105 and the rewinding gear 201 mesh with each other, the planetary gear 105 rotates and transmits the rotation of the first motor M1 to the rewinding gear 201.

The transmission gear l, 06, which rotates counterclockwise, is the driving side of the mirror box drive system. 107 is the transmission gear 10
6 is a transmission shaft fixed to one end, and a worm gear 108 is fixed to the other end. Movement of the transmission shaft 107 in the thrust direction is restricted by bearing portions 115 of the base plate 101 disposed at both thrust direction positions of the worm gear 108 .

Reference numeral 120 denotes a mirror drive gear that meshes with the worm gear 108 and rotates clockwise.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 main plate lO1.
It is rotatably supported by 16. put it here,
The mirror drive cam 121 has a rising cam surface 121 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.

A mirror drive lever 130 is made up of two levers fixed in an abbreviated shape, is rotatably supported by a boss 117 of the base plate 101, and serves as a cam follower of the mirror drive cam 121. That is, the mirror drive lever 130 receives rotational drive in the counterclockwise direction by having one end 131 in sliding contact with the ascending cam surface 121a of the mirror drive cam 121.
1b, thereby maintaining the counterclockwise rotating state, and slidingly contacting the downward cam surface 121c (even if there is no actual sliding contact, the one end 131 and the downward cam surface 121c
(if they correspond in position), 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) operation,
The push of the mirror pin 74 is continued to maintain the mirror up state, and the push of the mirror pin 74 is released to allow the mirror to go down (rotation return to the viewfinder observation position).

140 is a shutter charge gear that meshes with the mirror drive gear 120 and rotates counterclockwise, and a shutter charge cam 141 is integrally formed on the front side.

Note that this shutter charge gear 140 performs l:l 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 an ascending cam surface 141a for driving a shutter charge lever 150, which will be described later, counterclockwise, and a rotational position (charged state) of the shutter charge lever 150.
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 the shape of an abbreviation, which is rotatably supported by a boss 119 on the base plate lot, and serves as a cam follower of the shutter charge cam 141. That is, this shutter charge lever 150 has a roller 151 supported at one end that touches the rising cam surface 141 of the shutter charge cam 141.
a, receives rotational drive in the counterclockwise direction by contacting with the flat cam surface 141b, maintains the counterclockwise rotational state by contacting with the flat cam surface 141b, and the downward cam surface 14
When the roller 151 reaches the phase 1c, rotation in the clockwise direction is permitted. The roller 152 supported by the other end of the shutter churn lever 150 is
By being controlled according to the rotational position of each cam surface of the above-mentioned Nyatsuta charge cam 141, one end 30 of the seesaw lever 305 in the Nyatsuta unit 300 described below
5a to charge the shutter, and continue to push the seesaw lever 305 to maintain the churning operation (the shutter unit 300 will be described later, but the shutter unit 300 in this embodiment does not allow the continuation of the charging operation. The seesaw lever 305 can mechanically hold both the front and rear shutter curtains in the travel preparation position.
The seesaw lever 305 is returned by releasing the pushing movement (the mechanical holding of both the leading and trailing shutter curtains in the travel preparation position is released, and thereafter, shutter travel is enabled by controlling the energization of the control electromagnet) Have them do it.

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 130 is pushed to move the movable mirror 70.
When the shutter is in the up state (exposure retreat position), the shutter charge cam 141 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, that is, a ground pattern 161. 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 the completion of shutter charging is detected, which corresponds to FIG.
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. 162, and the potential of the connector portion (land portion) 162a of the detection pattern 162 changes to the ground level, thereby detecting completion of shutter charging. To explain this detection in more detail, a ground level signal in a camera control circuit, which will be described later, is supplied to the connector portion (land portion) 161a of the ground pattern 161, while the output of the connector portion 162a of the operation end detection pattern 162 is supplied to the connector portion (land portion) 161a of the ground pattern 161. Supplied to the camera control circuit (input port pH). 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 portion 122a of the brush 122 is in contact only with the ground detection pattern 161, and this detection pattern 162 has not yet changed to the ground level. From here, the mirror drive gear 120 further rotates clockwise,
At the same time, the brush 122 also rotates clockwise, and as shown in FIG.
), the brush 122 (conductive material) also comes into contact with the operation end detection pattern 162,
The potential of the operation end detection pattern 162 is the same as that of the brush 12.
2, the camera control circuit detects the shutter charging completion state and controls the rotation of the first motor Ml to stop. Note that the position of the brush 122 in FIG. 4(a) described above and FIG.
The position of the brush 122 in Fig. 4(a) is different from that in Fig. 4(a).
Although the first motor M1 is controlled to stop (braking) at the position shown in FIG. a) shows the stop position of the first motor Ml in a state where the overrun has occurred. However, in Figure 3 (a
) The stopping position of the mirror drive gear 120 (brush 122) is shown for explanation purposes when the overrun is calculated to be the maximum, and in reality, the mirror drive gear 120 (brush 122) is stopped at a slightly smaller amount of oats<-run. Gear 120 can be stopped. As is clear from FIG. 3(a), the shutter charge cam 141 is formed with a flat cam surface 141b that allows the shutter charge to continue in the completed state, assuming an overrun of the first motor M1. The overrun is being dealt with.

On the other hand, FIG. 4(b) shows the phase in which mirror-up completion is detected, which corresponds to FIG. As shown in FIG. 4(a), the sliding part 122 is rotated clockwise from the state shown in FIG.
a is the ground pattern 161 and the operation end detection pattern 1
．． 62 is switched from contact to non-contact of 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 (
Completion of mirror up is detected by the change to 1 level (normally 1 level).

To explain this detection in more detail, the brush 122 is moved to a position before the state shown in FIG. 4(b) (the brush 122 is rotated counterclockwise from the position shown in FIG. 4(b)). brush 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.

The difference between the position of the brush 122 in FIG. 4(b) and the brush 122 in FIG. 3(b) is that the first motor M1 is in the position of FIG. 4(b). Although stop control (braking) is performed, the first motor M1 cannot be stopped instantaneously and a slight overrun occurs. This shows the stopping position when an overrun has occurred. However, the mirror drive gear 120 (brush 12
For the sake of explanation, the stop position 2) 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 M1.
Assuming an overrun, 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, the important thing is that all operations, namely shutter charge and mirror up, as well as shutter charge release and mirror down allowance, are performed. All this is done with the first motor M rotating in the same direction. That is, as the first motor Ml rotates counterclockwise (the output gear 102 rotates counterclockwise) as shown in FIG. 5(a), the planetary gear 105 rotates counterclockwise and meshes with the transmission gear 106. All operations are performed in this state. The rotational force of the first motor M1 rotates the mirror drive gear 120 clockwise and the shutter charge gear 140 counterclockwise. Further, the mirror drive cam 121 in the mirror drive gear 120 is at a position where the mirror is allowed to move down (FIG. 3(a)).
, the shutter charge cam 141 of the shutter charge gear 140 is in the position to charge the shutter (FIG. 3(a)), and the mirror drive cam 121 is in the position to perform mirror up (FIG. 3(a)). b))
When the shutter charge cam 141 is in 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 shutter travel, it rotates in the same direction again, and the next shutter charge is completed (Fig. 3 (b)). 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 6(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 shutter curtains are running after the shutter charge is released.

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

Reference numeral 302 designates a charge lever within the shutter unit 300 for charging the blade drive levers 303 and 304 mentioned above, and these constitute a shutter 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(a).

307 and 308 are a front tension lever 307 and a rear tension lever that are charged by the charge lever 302 and prevent the rotation of the two-light drive lever 304 and the rear drive lever 303 until a shutter run signal is issued from the camera control circuit, which will be described later. 308.321.322 holds the rear blade group 351 in a parallel link, and each has a rotating shaft 326.3.
The rear blade traveling arm rotates around 27 to move the rear blade group 351, and 323 and 324 hold the leading blade group 352 as parallel links, and rotate around rotating shafts 328 and 329, respectively. By doing so, the leading blade group 35
This is an arm for running the leading blade.

In this embodiment, in addition to the above configuration, a pair of light shielding blades 341 and 342 are linked to the rotation of the seesaw lever 305 for churning up from the retracted position shown in FIG. 6(b). It has a light shielding device configured to be moved up to the light shielding position shown in FIG. 6(a).

In the light shielding device in this example, two L-shaped light shielding blades 341 and 342 engage the shutter base plate 301 at the rising part of the L shape with a pin and a long groove to guide upward and downward movement. and L-shaped legs 341a, 34.
2a, the seesaw lever 305 and shaft 331. 332
By linking each other via , a linked movement of upward movement and downward movement is 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 3112 are moved from FIG. 6(b) to FIG. 6(a) by rotating the seesaw lever 305 in the counterclockwise direction as shown in FIG. When the seesaw lever 305 rotates clockwise, the downward movement from FIG. 6(a) to FIG. 6(b) is performed, and each light shielding blade 34
1.342 and the rotating shaft 331 of the seesaw lever 305.
Since the connection position with 332 is completely different, its upward and downward strokes are made to be different.
The accommodation volume is reduced due to overlapping at the retracted position, and the gap is widened at the light shielding position to cover a light shielding area over a predetermined range. Note that 360 is a spring member that always biases the seesaw lever 305 clockwise (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 springs 384 . 390, they are biased clockwise and counterclockwise, respectively. 385 and 391 are implanted in the base plate 370, and are connected to the armature lever 380, respectively.
．． This is a stopper pin that regulates the initial rotation position of 386. One end 380a of the armature lever 380 is the seventh
At a position rotated a predetermined distance counterclockwise from the initial rotation position shown in the figure, it comes into contact with the pin 307a of the tip tensioning lever 307, and can release the tension. Further, one end 386a of the armature lever 386 comes into contact with the pin 308a of the rear tensioning lever 308 to release tension at a position rotated a predetermined distance clockwise from the initial rotational position shown in FIG. It is possible. 383 and 389 are coils, and when energized, the armature lever 380. 386 are suction-rotated against springs 384 and 394, respectively. In the figure, 370a indicates the shutter charging state (see Fig. 6(a)).
) is the notch portion that the pin 307a of the tip tensioning lever 307 comes into contact with. Although omitted in FIG. 6 due to the complexity of the illustration, the end tensioning lever 307 is biased counterclockwise by a weak spring so that the pin 307a comes into contact with the inner edge of the notch 370a. It is set. 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 clockwise by a weak spring, and the pin 308a is set so as to come into contact with the inner edge of the notch 370b. has been done. 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 photographing operations and the shutter completes its travel, the camera enters the state shown in FIG. 6(b).

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

This churning operation is provided by counterclockwise rotational driving of the steering wheel chassis 150 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 foot portions 302a and 302b of the charge lever come into contact with the roller portions 303a and 304a of the drive levers 303 and 304, respectively, giving rotational motion to the drive levers 303 and 304.

When the drive levers 303 and 304 rotate, rotational motion is applied to the trailing blade traveling arm and the leading blade traveling arm 321 and 323, which are engaged with the respective shafts 303b and 304b through the holes 321a and 323a. Linked trailing blade group 351 and leading blade group 352
Move it upwards 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 charging is completed and the state shown in FIG. 6(a) is reached, in which the next release operation is waited for.

Here, in the process of charging the seesaw lever 305, the rotating shaft 331°33 on the seesaw lever 305
2. Shading blades 341 rotatably attached to each
The light shielding blade 342 is moved upward in the figure. At this time, since the light-shielding blades 341 and 342 are engaged with the guide pin 371 through their respective long guide grooves 341b and 342b, their posture is regulated by the guide pin 371, and they remain almost horizontal in the figure. Move upward in the middle and move to the position shown in Fig. 6 (a) in the charging completed state,
The lower part of the exposure opening 301a of the shutter base plate 301 is covered.

Charging is completed in the second 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 camera charge lever 150 is moved from the position shown in FIG.
Evacuate to the position shown in Figure (b).

Next, the seesaw lever 305 is rotated clockwise in the drawing by the spring member 360, and the link lever 306 gives counterclockwise rotation to the charge lever 302 linked to the seesaw lever 305, respectively. ) to the state shown in FIG. 6(b).

As the seesaw lever 305 rotates, the rotation shaft 3
The light shielding blade 3411 and the light shielding blade 342 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. It moves from the state shown in FIG. 6(a) to the state shown in FIG. 6(b) and retreats outside the exposure opening 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 counterclockwise against the spring 384. Then, due to the suction rotation of the armature lever 380, the one end 380a pushes the pin 307a, and the end tensioning lever 3
07 rotates clockwise and disengages from the projection 304C, the light-driven lever 304 rotates clockwise, the leading blade traveling arm 323 also rotates in the same direction, and the leading blade group 352
(upward travel in the figure) to start exposure. Then, at a predetermined timing, the camera control circuit energizes the coil 389 shown in FIG. . Then, due to the suction rotation of the armature lever 386, the one end portion 386
a pushes the pin 308a, 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 The rear blade group 351 is also rotated in the same direction to cause the rear blade group 351 to travel (downward in the figure), thereby completing the exposure.

The explanation so far has been about the mirror box drive mechanism 100 and the printer 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 base plate 210 is placed on the camera body 40 above the cartridge chamber 44 in FIG.
The rewind gear 20 is sometimes assembled to the camera body.
1 is arranged and set at a position where the planetary gear 105 can mesh with the planetary gear 105 when it revolves clockwise. 202 is a rewinding fork, and 203 is a connecting member. A connecting member 203 is fixed to the lower part 201a of the rewinding gear 201 with a screw 205, while the rewinding fork 202 is movable independently in the thrust direction with respect to the connecting part 203, and is interlocked in the rotational direction. It is supported as such. The coil spring 203 serves to constantly bias the rewind fork 202 downward, and when loading the film cartridge 50 into the cartridge chamber 44, the chain rewind fork 202 resists the coil spring 203. can be moved 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 M1 used as a drive source for the mirror box drive mechanism 100 also serves as a drive source for the film rewind drive mechanism 200. However, the rotation direction of the first motor Ml during film rewinding drive is clockwise rotation as shown in FIG. 5(b). That is, when the first motor M+ rotates clockwise, the sun gear 104 rotates clockwise via the output gear 102 and the reduction gear 103.
The planetary gear 105 revolves clockwise due to the friction of the coil spring 111 and meshes with the rewinding gear 201 .

Then, when the idling gear 105 and the rewinding gear 201 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 rotates counterclockwise. The rotation of the first motor Ml is transmitted to the rewinding gear 201 by rotating in the direction of the rotation direction. Further, the clockwise rotation of the rewind gear 201 is transmitted to the rewind fork 202 via the connecting member 204, and as the rewind fork 202 rotates, the cartridge shaft 51 of the film cartridge 50 is rotated in the rewind 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 overall 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 film's grip. 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 claws 402a that engage with the film perforations 54. 403 is a film guide, and a guide roller 403a is formed which is rotatably supported. M2 is a second motor arranged inside the spool 401, and a motor pinion (output gear) 404a is configured as an output.

405 is a transmission gear that meshes with the motor pinion 404a;
406 is a common sun gear for two planetary clutches, which will be described later, and meshes with the transmission gear 405 described above. Specifically, the sun gear 406 has two gears: a large gear 406a that meshes with the transmission gear 405, and a small gear 406b that constantly meshes with planetary gears 411 and 413, which will be described later.

412 is a spool side planetary lever, and the sun gear 4
06, and is frictionally coupled to the sun gear 406 by a coil spring or the like, and is configured to swing in the direction of rotation in accordance with the rotation of the sun gear 406. ing. 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. 414 is a sprocket side planetary lever,
It 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 as the sun gear 406 rotates,
It is configured to swing in the direction of rotation. Moreover, this sprocket side planetary lever 414 has a sprocket side planetary gear 41 that meshes with the small gear 406b at the swing end position.
3 is rotatably supported. Reference numeral 409 denotes a spool-side transmission gear, which is disposed at a position where it can mesh with the spool-side planetary gear 411, and when the sun gear 406 rotates counterclockwise, the spool-side planetary lever 412 is moved in the counterclockwise direction. When the spool side planetary gear 4
11 and the large gear 409a of the transmission gear 409 mesh with each other,
As the sun gear 406 rotates clockwise, the mesh is released. 410 is a small gear 409b of the transmission gear 409
It is a spool gear that meshes with the spool 401, and is fixed to the spool 401 by the engagement protrusion 401b of the spool 401, thereby rotating the spool 401.

On the other hand, 407 is a sprocket side transmission gear, which is disposed at a position where it can mesh with the sprocket side planetary gear 413, so that the sun gear 406 rotates counterclockwise.
When the sprocket-side planetary lever 414 is swung counterclockwise, the sprocket-side planetary gear 413 and the large gear 407a of the transmission gear 407 mesh with each other, and as the sun gear 406 rotates clockwise. release the mesh,
A sprocket gear 408 meshes with the small gear 407b of the transmission gear 407, and is fixed to the sprocket 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 formed at the tip.

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 projection 416b that is pushed when the back cover 430 is opened and closed, which will be explained later in FIG. It is pivoted on.

Reference numerals 417 and 418 are base plates for pivotally supporting the various gears described 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. On the lower surface of this rotary substrate 420, a first circular part 420a whose entire circumference is ring-shaped is formed near the center, and a plurality of radial patterns connected to the first pattern part 420a are formed near the outer diameter. A second pattern portion 420b is formed, and a third pattern 420c is formed by further extending one of the second pattern portions 420b in a radial manner. 422,4
23 and 424 are sliding brushes that slide on the rotating base plate 420 and convert the rotational state of the sprocket 402 into electrical pulse signals, and the sliding brush 422 is the same as the first sliding brush 424.
The sliding brush 424 slides on the pattern portion 420a, and the sliding brush 424 slides on the second pattern portion 420b.
3 slides on the third pattern portion 420c, and although a detailed connection circuit is not shown in this figure, as is known in the art in this type of rotation detection, for example, the sliding brush 422
By applying a power level voltage to the sprocket 402, the sliding brushes 424 and 423 can output a pulsed signal in response to the rotation of the sprocket 402.

The film winding drive mechanism 40 described above with reference to FIG.
0, starting from the sun gear 406 rotated by the rotation of the second motor M2, the spool side planetary gear 411→
Transmission gear 409 → spool gear 410 → spool 401
The first winding transmission system that rotates the spool 401 is the same as the first winding transmission system (starting from the sun gear 406, rotating the sprocket 402 as follows: sprocket side planetary gear 413 → transmission gear 407 → sprocket gear 408 → sprocket 402). The peripheral speed ratio of the spool 401 by the first winding transmission system is equal to the peripheral speed ratio of the sprocket 402 by the second winding transmission system. This is set to be larger than that of the first winding transmission system 411, 409, 410, and 401, so that the winding of the film leader part 56 onto the spool 401 is improved. , a spool-side planetary gear 411, a spool-side planetary lever 412, and a transmission gear 409.
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, swings both planetary levers 412 and 414 counterclockwise, and connects the spool-side planetary gear 411 to the spool-side transmission gear 4.
09 (large gear 409a), and the spool 401
is rotated in the winding direction, while the sprocket side planetary gear 413 is rotated to the sprocket side transmission gear 407 (large gear 40
7a) and also rotate the sprocket 402 in the winding direction, a part of the film leader can be fed to the spool 401 and wound onto the spool 401. Note that the back cover 430 is in a closed 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 pushed back beyond the position shown in the figure by the biasing force of the biasing spring 440. Prevents it from rotating clockwise. 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 below
The back cover detection switch 480 described in 1. is a contact piece 481.
The open/closed state of the back cover 430 can be detected by the conduction or non-conduction of 482.

By winding the film by a predetermined even amount in the state shown in FIG. 9(a), a portion of the film league 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 the film by a predetermined equal amount, the second motor M2
This figure shows a state in which the sun gear 406 is rotated in the clockwise direction, and the small gear 406b of the sun gear 406 rotates clockwise to swing the 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 pin 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 a state in which the pin 415a is completely locked by the claw portion 416a. In this state, the sprocket-side planetary lever 414 is held at the position shown in the figure, and when the sun gear 406 rotates counterclockwise thereafter. It also becomes impossible to oscillate.

FIG. 9(d) shows that the second motor M2 is rotated counterclockwise again to rotate only the spool 401 by an equal amount of film 1 in order to determine the final operation of AL, that is, whether AL was successful or failed. Shows the driven state. 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 40
Even when the small gear 406b of No. 6 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 this figure 9 (
In the state before d), the leader part 5 of the film 52 has already been removed.
6 is securely wound around the outer periphery 401a of the spool 401, the film will be wound up by one more frame even when only the spool 401 is driven as shown in FIG. It will rotate as it 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 the back cover 4 in order to replace the film cartridge 50 with a new one after all the 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 pin 415a of the holding member 415 is rotated counterclockwise by the urging force of the holding member 415 to release the locking of the holding pin 415a of 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 the AL, so that the film leader portion 56 is fed and wound onto the spool 401 at the initial stage of the AL. On the other hand, in the final stage of AL, only the spool 401 is rotated and the sprocket 402 is free, so AL can be easily performed by detecting whether or not the sprocket 402 is rotated by the film 52 in this state. It is characterized by the ability to judge success and failure. Therefore, the success or failure of AL can be determined by the rotating substrate 420 moving with the sprocket 402, and the conventional rotating wheel driven only by the film can be newly configured as a detection mechanism, or the movement of the film perforation 54 can be optically controlled. The success or failure of AL can be confirmed with a simpler configuration compared to a configuration with a detection mechanism that reads the data. Furthermore, in this embodiment, the rotary board 420 for detecting the success or failure of AL is also used to detect one frame winding during normal shooting after AL, so the overall configuration is simplified in this respect as well. is contributing to.

Next, based on FIG. 10, the photographing 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 in both plates are inserted into 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 float 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 from an open position to a closed position.

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

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

FIG. 11 is a circuit diagram showing the overall configuration of the camera control circuit. In FIG. 11, BAT is a power supply battery, CON is a DC/DC converter, and MCI is a microcomputer (hereinafter abbreviated as microcomputer).

The DC/DC converter CON receives an unstable voltage ranging from 4 to 6 volts from the power supply battery BAT through an input terminal IN, converts it into a stable voltage of 5 volts, and outputs it from an output terminal OUT. However, DC/DC converter C
ON outputs a voltage of 5 volts when a high level signal is input to its input terminal CNT, and stops the voltage conversion operation and outputs a voltage of 0 port when a low level signal is input.

Control input terminal C of DC/DC converter CON
NT is connected to the output terminal P4 of the microcomputer MCI, and its operation is controlled by the microcomputer MCI.

MC2 is a microcomputer with a built-in E2PPOM (non-volatile memory) capable of high-speed calculation processing, and A D l is A7'
The D converter, R1 and R2 are resistors. BUSI is a bus 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 pIi source battery DAT, and the A/D converter A
Input to input terminal IN of DI. The A/D converter ADI converts this voltage into A/D and sends 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 20);
AMP is an amplifier for amplifying the output of the silicon photodiode SPD and performing temperature compensation, and AD2 is an amplifier AM.
The output terminal OUT of the amplifier AMP is connected to the input terminal IN of the A/D converter AD2. BUS2 is A/D converter A
This is a path line for communication between D2 and microcomputer MC2, and A/D converter AD2 transmits photometric values to microcomputer MC2 through path line BUS2. A/D converter AD1. AD2 and amplifier AMP, MA, icon MC2
The circuit operates by being supplied with power from the 5V stable voltage output from the DC/DC converter CON. Therefore D
When the C/DC converter CON stops voltage conversion operation, the circuit is in a non-operating state.

SBP is a switch (back cover detection switch 480 shown in FIG. 9) that is linked to the back cover of the camera, and 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 Figure 1) This switch is normally off, but turns on when the rewind button I4 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, and SW2 are input ports PI, R2, and R3 of the microcomputer MCI, and input ports P5. They are connected to R6 and R7, respectively, so that both microcomputers MC-1 and MC2 can independently detect on/off status. The switch 5CN2 is connected to the input port P8 of the microcomputer MC2 so that only the microcomputer MC2 can detect on/off.

l3US3 is a pass line for communication between microcomputer MCI and microcomputer MC2. The DISP is a display device using, for example, a liquid crystal, 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 DISP.

DR of display driving IC and microcomputer MC2 are on pass line B
Connected via US4, display information is sent from 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 Dll and DI2, respectively. Therefore, the circuit is constantly operating while the power supply battery DAT is attached to the camera.

MG 31 is a coil (corresponding to coil 383 in Fig. 7) having an electromagnetic structure for starting the front curtain of the shutter M
G32 is an electromagnetic coil (corresponding to coil 389 in FIG. 7) for starting the rear curtain of the shutter.

Coil M G 31 is connected to the collector of transistor TRI, and coil M G 32 is connected to the collector of transistor TR2. The base of the transistor TRI is connected to the output port P13 of the microcomputer MC2 via the base resistor R3, and similarly, the base of the transistor TRI is connected to the output port P13 of the microcomputer MC2.
The base of is connected to the output port P14 of the microcomputer MC2 via a base resistor R4. The microcomputer MC2 has an output port P13. By outputting a signal from R14, the shutter speed can be controlled.

The coils MG 31 and MG 32 are also used as actual load resistances when checking the voltage while the shutter is locked so that it does not run, but this control is also controlled by the output capo-)I"13.I) This can be performed by the microcomputer MC2 based on the signal output from 14.

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 h-run raster TR15, N
The collector of the PN transistor TR16 is connected, and the other end is similarly connected to the PNP transistor TR18, NPN
The collector of transistor TR17 is connected. The bases of the transistors TR15, TR16° TR17, TR18 are connected to base resistors R15, R16, R1, respectively.
7, Output port P15 of microcomputer MC2 via R18
．． Connected to R16, R17, and R18.

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

The microcomputer MC2 controls the second motor M by outputting signals from the output ports R15, R16, R17 and R18.
2 can be freely operated in forward and reverse rotation.

For example, output port P]5. 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, output port P15. By outputting a low level signal from P16 and a high level signal to R17 and R18, transistors TR16 and TR18 are turned off, and transistors TR15 and TR17 are turned on, so that the current flows from right to left. 2 motor M2 reverses.

Ml is a first motor for charging the shutter and driving the mirror; one end of the two terminals of the motor M1 is connected to the collectors of a PNP) transistor TR19 and an NPN) transistor TR20; Similarly, PNP transistor TR22 and 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 P of microcomputer MC2 via 21°R22
19° Connected to R20, R21, and R22.

The emitters of the transistors TR19 and 'rR22 are connected to the (+) side of the power battery DAT, and the emitters of the transistors TR19 and 'rR22 are connected to the (+) side of the power supply battery DAT.
0, the emitter of TR21 is connected to the (-) side.

Similarly to controlling the second motor M2, the microcomputer MC2 controls the output port P19. By outputting signals from P2O, R21, and R22, the first motor Ml 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. The signal from switch SM1 is connected to input port P9 and PIO of microcomputer MC2,
The microcomputer MC2 can detect on/off signals of the pattern on the rotating board as the second motor M2 rotates. Similarly, the switch SM2 is a brush sliding switch (switch consisting of the brush 122 and signal board 160 shown in FIGS. 3 and 4) that rotates in conjunction with the rotation of the cam that moves the mirror up and down and charges the mirror. corresponding),
Since the signal from the switch SM2 is connected to the input port pH,I"12 of the microcomputer MC2, the signal from the microcomputer MC2
2 can detect an on/off signal accompanying rotation of the first motor Ml in one direction.

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 i' when the microcomputer MC2DC/DC converter CON is off and the power supply is stopped.
Resistor to keep R3 in off state, power supply type 7tl
It is provided between the (+) side terminal of JIIAT and the base of transistor TR3 via base resistor R6.

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 controls the aperture blades (
(see Figure 10) are closed and opened.

One end of the two terminals of the third motor M3 is connected to the collector of a PNP transistor TR23, an NPN) transistor TR24, and the other end is similarly connected to the collector of a PNP transistor TR26, an NPN) transistor TR25. . Transistor TR23゜TR24
, TR25, and TR26 are each connected to a resistor R2.
3, R24, R25, and R26 are connected to the output ports of the microcomputer MC3) R23, R24, R25, and 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 DAT via the mount contact between the camera and the 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. The camera side microcomputer MC2 uses this lot line BUS5 to instruct the lens side microcomputer MC3 to drive the third motor M3 to narrow down the aperture blades to a predetermined position, or to return the aperture blades to the open position. It is possible to command the third motor M3 to be driven in the reverse direction.

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 the EIFROM, 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 BAT 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, photometric amplifier, and eight Ni
I) and A/D converters ADI and AD2.

[Step 2] Read the back cover switch SDI' 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 the flag X that is flashing and remembers 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 1. [Step 4] Set flag X to 0 to remember that the back cover is open. After this, the process branches to step 9.

[Step 5] If the flag X is O, the process branches to step 6; if the flag is .

[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 the switch SRW to check whether the rewind button 14 is pressed. If the rewind button 14 has been pressed, the process proceeds to step 9; if it has not been pressed, the process branches to step 8.

[Step 8] In order to check whether the release button 12 is pressed, the states of the release switches S to V2 are read. If the release switch SW2 is on, the process branches to step 9, and if it is off, the process branches to step IO.

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

[Step 103 Determine whether or not the DC/DC converter CON is currently on, and turn the DC/DC converter CO on.
If N is off, return 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 (4) is turned on.

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

[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.

[Stellaf 13] Outputs a low level signal to output port P4, turns off the DC/DC converter CON, and converts the DC/D
Stops output of 5 volt stable voltage from 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/ Operate the DC converter CON to supply power to the microcomputer MC2, photometric amplifier AMP, and A/D converters ADI and AD2,
After the supply, the DC/DC converter CON is turned on until the DC/DC converter off command from the microcomputer MC2 is received, and the DC/DC converter C is turned off by the microcomputer MC2.
When the receiver receives the ON-OFF command, it performs an operation to turn off the DC/DC converter CON.

Next, the operation of the microcomputer MC2 after the DC/DC converter CON is turned on will be explained. The microcomputer MCI is configured to operate constantly from the moment the power supply battery BAT is turned on, and the microcomputer MC2 is configured to receive power and start operating only when the DC/DC converter CON is turned on. This is because the microcomputer MC2 is assumed to be a low-speed microcomputer with low power consumption that only needs to perform the task of detecting switches, 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 back cover switch SBP.

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 ■ which remembers the previous open/close state of the back cover. When flag I is O, it indicates that the back cover is open. If the flag I is 1, the process branches to step 6; if the flag I is O, the process branches to 20. Regarding the memory contents of microcomputer MC2,
2. E that the contents of the memory will not be lost even if the power supply is stopped.
There is no problem because it has 2FROM (non-volatile ROM) type memory. In addition, even if you do not have 82220M type memory, there is a well-known method that backs up the memory with an external button-type lithium battery and saves the memory contents even if the power supply to the DC/DC converter CON stops. Conventional techniques may also be used.

[Step 16] Since the back cover has changed from the closed state to the open state, the flag ■ is set to O 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 I is 1, step 2
0, and if the flag ■ is 0, the process branches to step I9.

[Step 19] Since the back cover has changed from the open state to the closed state, the flag ■ is set to 1 to remember that the back cover is closed. Thereafter, the process branches to step 23, which is the autoloading sequence shown in FIG. 13B.

[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 SCI.

[Step 177] The content of communication from the outside is E2F RO
It is determined whether the command is to rewrite flag Z of M. If it is a command to rewrite 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 Z 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 flag Z of E"FROM 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 0.

[Step 26] Perform a voltage check. Check the voltage using the shutter control electromagnet coil MG31. This is done by energizing the MG32 for 10 milliseconds and reading the voltage from the A/D converter ADI, but the details are omitted because the flow becomes 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 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.
I”17. Performed 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] 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 P9 is stored as being switched off. 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 the film. ) A signal that repeats on and off (the output of the sliding brush 424 repeats the initial level and ground level) is input, and if the on and off signal is repeatedly input, the microcomputer MC2 will switch to sprocket 4.
02 is rotating, and if the on/off (repeating signal) has stopped, the microcomputer MC2 determines that the sprocket 402 has stopped.In step 30, if flag A is 1, step 33 If flag 8 is 0, 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 31] Compare the previous state of input port P9 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 the input 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 a predetermined second (for example, 350 milliseconds) It is determined that the sprocket 402 is stopped, and the process proceeds to step 37. If 350 milliseconds have not yet elapsed, the process proceeds to step 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] The previous state of the input port PIO is memorized (check the flag C). When the flag C is O, the previous state of the input port PIO is memorized as the switch-on state, and the flag C is When is 1, the previous state of input port P10 is memorized as the switch off state.The signal input to input port PIO is the sprocket 4
02 (sliding brush 423 shown in FIG.
(obtained from ), the switch is turned on (the output of the sliding brush 423 is switched to the ground level) at the time when the winding corresponding to the film uniformity is completed. Also, when winding of the next equal portion of film is started, it is immediately turned off (the output of the sliding brush 423 is switched from the ground level to the initial level), and it is turned on as soon as the winding of the next one frame is completed. . Therefore, by detecting this signal, the microcomputer MC2 can control film winding. In step 38, if flag C is 1, step 4
1, and if flag C is 0, the process branches to step 39.

Immediately after the autoloading sequence starts, step 25
Since flag C is set to 0 in step 39, the process branches to step 39.

[Step 39] Compare the previous state of input port PIO with the current state. If there has been a change, the process returns to step 40; if not, the process returns to step 3o.

[Step 40] Since the input state of input capo-1-PIO has changed, the flag C is newly set to 1. then step 3
Returns to 0 and continues autoloading operation.

[Step 41: Compare the previous state of the person 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 port PIO signal has switched from OFF to ON, it means that -equal winding has been completed, and memory G, which is the memory that counts the number of winding frames during autoloading, is Increment.

[Step 44] 3 empty windings during autoloading
Check if the piece is finished. If after finishing 3 frames, go to step 48; if not after finishing 3 frames AL, go to step 45
Branch into.

[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 relating to switching of the film drive method after winding up three frames. 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 for 100 milliseconds (9th
energization until the state shown in Figure (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 during autoloading of the last four frames.

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 402 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 has been successful, but the sprocket 402 is not rotating, it is determined that the autoloading has failed, for example, because the film leader portion 64 is not properly wound around the spool 401. I'll come.

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. Also, as will be described later, the program jumps from the rewinding sequence shown in FIG. 13E.

[Step 37-2] In order to start mirror up, the first motor M1 is energized in the normal rotation (FIG. 3(a)).

(b) As shown in FIG. 5(a), the counterclockwise rotation state of the sun gear 104 is started by the counterclockwise rotation of the first motor Ml.

[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 input port P11 (output signal of operation end detection pattern +62 in FIGS. 3 and 4). The signal input to the input port pH is the third
This signal is linked to the mirror drive gear 120 and shutter charge gear 140 (mirror drive cam 12+, shutter charge cam 141) explained in FIG. Completion of shutter charging and completion of mirror up can be detected as a change in potential in a sliding state between the operation completion detection pattern 162 (conducted to the ground level) and the operation completion detection pattern 162.

Specifically, when the shutter charge is completed (the movable mirror 70 is in the down state), the input capacitor)-pH turns on (the potential changes from the initial level to the ground level), and the movable mirror 70
The ground pattern 161. The phase between the operation end detection pattern 162 and the brush 122 is set.

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 P12 will be explained here. The input port P12 becomes the output signal of the overrun detection pattern 163 in FIGS. 3 and 4, and when the rotating brush 122 and the overrun detection pattern 163 are in a sliding state, the first motor is activated when the shutter charging is completed. The amount of overrun of Ml (a state in which it rotates from when it is controlled to stop until it actually stops) and the amount of overrun of the first motor Ml when mirror up is completed are within the allowable setting range. Detection of presence or absence can be determined as a change in potential. Specifically, if the input port PL2 remains off (initial level) when shutter charging is completed, the overrun amount is within the setting range, and if it turns on (changes from the initial level to the ground level), the overrun amount is set. It can be determined that the range has been exceeded. Further, 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.

Note that the relationship between input port 1-pH and PI3 is that normally the input port p
H is on, input port P12 is off, input port pH is on while the movable mirror 70 starts to rise, input port P12 is on, input port pH is off when the mirror is raised (shutter charge is released), and input port P12 is on. On, while the shutter is being charged (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.

[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 lens is turned on at the mirror down (shutter charge completion) phase.
Since H is turned on, in step 61 the input port pH
Check the mirror down (shutter charge)
If this is completed, the process branches to step 63, and 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 Ml 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 shown in FIG. 13D 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:], [Step 65] Flags A and C used for subsequent processing are cleared to 0.

[Step 66] Check the battery voltage BAT.

The method is similar to step 26 of the autoloading sequence, so details will be 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] Check to see if the movable mirror is down (shutter charging completed). If the mirror is correctly down (shutter charging completed), the process branches to step 76. (If it is stopped in the middle (- if the Yatsuta Chashi is stopped in the middle), proceed to step 69.
Branch to.

[Step 69] The first motor M1 is rotated forward to lower the movable mirror to the correct position (to complete shutter charging).

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

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

[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 70] 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 M1 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 100 milliseconds 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 O, 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. The signal input to the input port P9 is a signal linked to the sprocket 402 as described above, and is input as a signal that is turned on and off a plurality of times (for example, 12 times) while the film is being rewound. 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 80, when flag A is 1, the process branches to step 83, and when flag A is 0, 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 port 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 O.

[Step 85] The timer for counting the energization time of the first motor Ml 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 power 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 PIO. 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 as described above, and the switch is turned on when rewinding corresponding to one minute of film is completed.

Also, if the rewinding of the next frame of the film continues, it will immediately turn off, and it will turn on again when -1 rewinding 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 91] The previous state of the input port P10 and the current state are compared. 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 input 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 PIO has changed, the flag C is newly set to 0.

[Step 95] Since the PIO signal has been switched from OFF to ON, rewinding for 11 minutes 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 process flow after power supply, the release sequence performs the process when the release button 12 is pressed.

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

[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 checks whether the release can be performed. For example, when the voltage value vo is vo<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 lOO] 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 Vo<4 volts, the process branches to step 102, and when vo>4 volts, the process branches to step 101.

[Step lot: 1 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 normal rotation of the motor M1 is started.

[Step 104] Start timer #2, which is a timer that counts the energization time of the first motor M1.

C step 105] Wait for 15 milliseconds until the rush current at the start of energization subsides.

[Step 106] Check the flag 1 which is a flag storing the high/low state of the voltage. 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 port P23, and power is supplied so that the third motor M3 for driving the aperture blades on the lens side can be driven. after that,
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 was not completed within 500 milliseconds, it is determined that an accident has occurred, and the energization of the first motor Ml is stopped.

[Step 113] Display data is output to the DR of the display driving IC so as 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 M1 when the mirror up is completed is equal to or greater than a predetermined amount.

[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 charge sequence (Fig. 13C) above, if the overrun amount at the completion of the mirror up is within the set range, the input port P12 is turned on and the process branches to step 11.1. However, when the overrun exceeds the set range, the input port P12 is turned off and the process branches to step 202 as an abnormal state 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(b).
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 surface 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 Ml is turned in the forward direction again to perform 1R. As a result, the mirror drive gear]20
rotates clockwise again and the mirror drive cam! 21 and the mirror drive lever 130, the movable mirror 7
0 is mirrored down once and then continuously mirrored up again. Further, the shutter charge lever 10 is also rotated counterclockwise again, and the shutter charge lever 150 is rotated for charging and for releasing the shutter. 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] When the lth motor M1 is restarted,
Wait for 50 milliseconds, which is enough time for the brush 122 shown in FIG. 4 to at least slide against the motion completion detection pattern 162. Thereafter, the process returns to step 109 and when the mirror up is completed (the input port pH is off), the rotation of the first motor M1 is stopped in step 111. In this state, if the overrun amount falls within the set range, the process advances to step 114.

[Step ll11] Communicates with the lens microcomputer MC3 to check whether the aperture has been stopped down to a predetermined position. If the aperture blades 530 have stopped down to the predetermined position, step 11 is executed.
If the aperture is not finished, 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 capo-h PI3 for 10 milliseconds to energize the electromagnet coil 383 for controlling the front curtain of the shutter to run the front curtain of the shutter. This starts the film exposure operation.

[Step 116] Waiting for film exposure time.

[Step 117] A low level signal is output from the output port P14 for 10 milliseconds to energize the coil 389 of the electromagnet for controlling the rear curtain of the shack, thereby running the rear curtain of the shutter. This completes the film exposure operation.

[Step 118] Switch S linked to completion of trailing curtain travel
Determine whether CN 2 is on or off. If it is off, the process remains in step 11B 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 as a result, when the voltage is high (for example, V.
. (4 volts) branches to step 122. To check the voltage, as described above, the leading curtain coil MG 31 and the trailing curtain coil MG 32 are simultaneously energized for 10 milliseconds, and the voltage during the 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, normal energization of the first motor Ml is started.

[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 127.

[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 blades 530 of the lens to the open position.

[Step 129] Communicates with the lens microcomputer MC3 to check whether the aperture has been returned to the open position. If the aperture blades 530 are open, the process goes to step 130; if the aperture is not open, the process returns to step 129. Wait until the aperture is fully opened.

[Step 130] The second motor M2 is energized in the forward rotation direction in order to evenly wind the film.

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

[Step 132] to [Step 135] Clear the discrimination flag used in the following processing, and set A=0. B=0°C
=0. Let F=0.

[Step 136] Check the input state of the input port pH. If the input state is on, it means that the mirror has finished lowering and the Nyatsuta charging has finished, so proceed to step 13.
If it is off, the process branches to step 142 because the mirror has not been completely down.

[Step 137] Since the mirror down (shutter charge) has been completed, the first motor Ml is stopped.

[Step 138] Mirror drive (shutter charge)
Check the flag B that stores whether only the first motor Ml for hoisting is operating, or whether the second motor M2 for hoisting is also operating at the same time. If the flag B is 0, the process branches to step 1515, and if the flag B month has passed, the process branches to step 139.

[Step 139] Set the deafness flag B to O.

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

[Step 141] The timer #l, which counts the energization time of the second winding motor λ12, is restarted. Thereafter, the process branches to step 151.

[Step 142] First motor Ml for driving the mirror
Check timer #2, which counts the energization time, and set 1.
If a second has elapsed, the process branches to step 143; if one second has elapsed, the process branches to step 145.

[Step 143] One second has passed without the first mirror drive motor M1 completing mirror down or shutter charging, so the first winding motor M1 is stopped and the first motor M1 The shutter is operated independently, and only the mirror down and shutter charge are performed first. At this time, if the second winding motor M2 has already stopped, the process branches to step 146.

[Step 144] Check flag E that stores the high/low state of battery voltage BAT, and if the voltage is high, 1116
Branch to.

[Step 145] When the status flag B for determining status flag B is 1, 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 204.

[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 it could not be driven simultaneously with the first motor M1 for mirror drive, the second motor M2 for belly winding 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] Check whether the first motor Ml for driving the mirror (for shutter charging) 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 204 is performed in the abnormal condition thin avoidance sequence in subsequent steps 205 to 208.
In the event of an abnormality, the first motor Ml for driving the mirror is rotated one more rotation, and as a result, the operation of the first motor Ml for driving the mirror (shutter charge) ends before the second motor M2 for winding ends. This step was inserted because there are cases where this step is 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 has been switched on and off while the input signal of the input port P9 is being increased by one frame. If the film is switched less than 71 times while winding one frame, the film will be switched immediately (or simultaneously) after the second motor M2 was stopped by the one-frame winding completion signal (input port PIO) during the previous winding. When the sprocket 402 is stretched and the driving force of the second motor M2 is lost, it is determined that the sprocket 402 has returned a little in the rewinding direction, and the process jumps to the above-mentioned rewind mode (step 64). 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 film 52 varies depending on the manufacturer and the winter season.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 film 52 itself is made of synthetic resin,
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 easily fed to the spool 401, resulting in a state in which the film 52 cannot be pulled out from the cartridge 50 even if an attempt is made to wind up the film 52 any further by rotation of the spool 401. and l″
There are cases where the winding of 5tiJ was possible because the film 52 was stretched. In such a case, when the second motor M2 stops and the driving force for winding the spool 401 is lost, the film 52 contracts due to its own return force, and the sprocket 402 engages with the film perforation 54. This causes the tape to rotate slightly in the rewinding direction. Therefore, when winding for the next frame is carried out next time, a one-frame winding completion signal is input to the input port P10 before winding l evenly, and the winding for one frame is actually performed properly. Even though this has not been done, a signal indicating that one frame of winding has been completed may be generated as an output signal. 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. This caused a problem in which the tension (end of film) could not be detected. 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 stretched, and the conventional auto rewind mode (step 64) for rewinding is performed. Problem solved.

Next, a case will be described in which the overrun amount of the first motor Ml is equal to or greater than a predetermined amount when the mirror down is completed in steps 205 to 208.

[Step 205] Check the input port PI2. As described in detail in the explanation of the empty charge sensor (Fig. 13c) above, if the overrun (■) occurs when the shutter charge (mirror down) is completed, the input capo hP12 is turned off and the step The routine branches to step 153 and becomes a normal sequence, but when the overrun amount exceeds the set range, the input port P12 is turned on and branches to step 206 as an abnormal state 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 I
IIO may also rotate further counterclockwise, and in the worst case, the flat cam surface 141b of the shutter charge cam 141 and the roller 151 of the shutter charge lever 150 may come out of sliding contact, causing the roller 151 to Down cam surface 1
41c, 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 impact resistance of the shutter unit 300. This causes a problem of deterioration.

[Step 206] 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 up once and then continuously mirrors down again. Further, the shutter charge gear 140 also rotates counterclockwise again, causing the shack churn lever 150 to rotate to release the charge and to rotate. However, even if the shack charge lever 150 rotates again in this state, the shutter unit 300 will not be adversely affected at all.

[Step 207] With the re-operation of the first motor Ml,
Wait for at least 15 milliseconds, which is the time required for the brush 122 shown in FIG. 4 to deviate from the motion end detection pattern 162 (non-sliding).

[Step 208] Timer # that counts the energization time of the first motor M1 for mirror drive (shutter charge)
Restart 2.

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] Flag 8, which is a flag for storing the previous state of input port P9, is checked. When flag A is O, the state of the previous input port P9 is memorized as the switch-on state, and when flag A is 1, the state of the previous input port P9 is stored as the switch-on state.
The state of P9 is memorized as a switch-off state. As mentioned above, the signal input to the input port P9 is a signal that is linked to the sprocket 402, and is a signal that repeats on and off multiple times (for example, 12 times) while winding up one sternum with the film, and is an on/off signal. If the signal is input repeatedly, the microcomputer MC2 determines that the sprocket 402 is rotating, and if the 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] The previous state and current state of input port P9 are compared. If it has changed, the process branches to step 156; if it has not changed, 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] Same as step 156, enter capo)
Compare the previous state of P9 and the current state, and if there is a change, go to step 15B; if not, go to step 16
Branch to 1.

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

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

[Step 161] Since there was no change in the input port P9, the timer that counts the energization time of the second motor M2 is checked, and if there is no change in the power port for 350 milliseconds, the sprocket 402 is stopped. - If it is determined that there is, the process proceeds to step 167, and if the 350 milliseconds have not yet elapsed, the process proceeds to step 162.

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

[Step 162] Record the previous state of input port PIO and check flag C, which is the flag set in QjL. 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. 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 sternum of the film 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, step 1
If the flag C is O, the process branches to step 65. Immediately after the winding operation, the flag C is set to 0 in step 13.1, so the process branches to step 163.

[Step 163] The previous state of the input boat PIO,
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] Since the input state of the input port PIO has changed, the flag C is newly set to 1. Then step 1
Returning to step 36, mirror down (shutter charge completion) and winding completion detection are continued.

[Step 165] The previous state of input capo-1-PLO is compared with the current state. If it has changed, step 1
If no change has occurred, the process returns 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 M1 is energized, the process branches to step +68, and when it is stopped, the process branches to step 169.

[Step 168] Check the flag r>, which is a flag that stores the voltage level. If the voltage is high, proceed to step 169; if the voltage is slightly low, the motors Ml, M
In order to stop the simultaneous energization of 2, the process returns to step 148.

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

[Step +75] 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 rewinding sequence described above. On the other hand, if flag Z is 0, 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. 11I is a flowchart of the microcomputer MC3 on the lens side.

[Step I70] Communicate with the microcomputer MC2 on the camera side.

[Step 171] Determine whether 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, proceed to step 172; otherwise, proceed to step 173. Branch out.

[Step 172] Third motor λ4 for driving the aperture blades
3 is energized in the forward rotation direction (counterclockwise in FIG. 1O) 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 +70. , 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, a schematic sequence of the camera sequence in the case of normal operation in this embodiment will be explained.

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 leader 56 is sent to the spool 401 and the film is attached. 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 stops and the camera waits for the next release operation.

By operating the release button 12, the first motor Ml 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 a charging release state. , the charge lever 30 inside the unit, which until now had a tensioning function to prevent the shutter from running incorrectly.
2 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 time, 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 forward direction by one frame. Furthermore, the third motor M3 for driving the aperture is reversely rotated to return the aperture to the open state. In this state, wait for the next release operation.

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 transmission system between the second motor M2 and the spool 401 is cut in reverse order, and the spool 401 is freed to reduce the rewinding load. In the future, the transmission system of the first motor Ml will be switched from the conventional mirror drive and shutter charge transmission system to the rewind transmission system, and then the rewind gear 201 of the rewind transmission system will be rewinded. When the rewinding is finished, the film 5
In order for all of 2 to return to the film cartridge 50, only a part of the film leader 56 must be slightly protruded from the cartridge 5o.When the opening degree is reached, the driven rotation of the sprocket 402 by the film 52 stops, and based on this detection, the first The camera sequence ends by stopping all operations including motor M1.

The characteristic feature of the above-mentioned embodiment is that the first motor M
Reverse drive for rewinding l (step 78 in Figure 13D)
), the second winding motor M2 is driven in reverse (step 76) to eliminate the load on the film winding drive mechanism 400 during rewinding. When reversely driven, the sun gear 406 rotates clockwise from the state shown in FIG. 9(d), the spool side transmission gear 411 is disengaged from the spool side transmission gear 409, and the second motor M2 and The connection with the spool 401 is cut off, the spool 401 becomes free, and even if the spool 401 is rotated in the rewinding direction by the film 52 during rewinding, there is no substantial unwinding load applied, and high-speed rewinding became possible.

If the second motor M2 during rewinding as in this embodiment
If this control is not performed, the spool-side planetary gear 411 of the planetary clutch of the film winding drive mechanism 400 will remain in mesh with the spool-side transmission gear 409, so that the first motor Ml
The load during rewinding becomes extremely large (because the second motor M2 must also be driven to rotate), and the rewinding speed inevitably becomes slow.

Furthermore, in this embodiment, the second motor M2 is driven in the reverse direction not only immediately before rewinding but also throughout the rewinding process to reduce the rewinding load. It is conceivable that some kind of shock during rewinding may cause the spool-side planetary gear 411 to mesh with the spool-side transmission gear 409 again, causing a sudden change in the rewinding load and damaging the film 52. It is from.

Although the second motor M2 is continuously driven in the reverse direction during rewinding, the purpose is simply to release the planetary clutch (maintaining the spool-side planetary gear 411 in a disconnected state from the spool-side transmission gear 409). Since only a small current, about no-load current, flows through the motor M2 of No. 2, the electrical load is almost negligible.

Furthermore, in this embodiment, the first motor Ml for rewinding is fixedly installed on the side surface of the mirror box 6o near the rewinding fork 202 (see FIG. 2), which is the final stage of the rewinding transmission system. The transmission efficiency related to the winding operation can be set to an extremely high value, and the second motor M2 that performs winding is also fixed within the spool 401, which is the final stage of the winding transmission system, so the transmission efficiency related to the winding operation can be set to an extremely high value. can be set to an extremely high value.

Furthermore, in this embodiment, the second motor M2 for winding the film 52 and the first motor Ml for rewinding the film 52 are each configured independently, so that the second motor M2 is at the film stop position when winding one frame. A motor with good controllability (for example, a coreless morph) is used to increase the precision of the film 52 and keep the frame spacing constant, while the first motor is a high-power motor that emphasizes speed, or a motor that emphasizes cost. This makes it possible to use different motors depending on the purpose, such as using a low-cost motor, making it possible to provide a high-performance or low-cost electrically driven camera.

(Effects of the Invention) As explained above, the present invention is based on the premise of achieving automatic rewinding only by energization control and improving the transmission efficiency of each transmission system, and reduces the unwinding load in a short time. It is possible to provide an electrically driven camera that allows rewinding.

[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. 1O is a 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 of FIG. 11. FIG. 14 is a flowchart for explaining the operation of the circuit shown in FIG. 11. FIG. 15 is a block diagram for explaining the characteristic operation of an embodiment corresponding to the present invention. 40・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・Camera body, 60・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・Mirror box, 70・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・Movable mirror, 100・・・・・・・・・・・・・・・・・・
・・・・・・Mirror box drive mechanism, 200 ・・・
・・・・・・・・・・・・・・・・・・・・・Film rewinding drive machine t1°1, 300・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・Shutter unit, 400 ・・・・・・・・・
・・・・・・・・・・・・・・・・・・Film winding drive machine (1”η, Ml・・・・・・・・・−・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
......First motor, M2...
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・Second motor, Si3・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・Third motor.

Claims (1)

[Claims] (1) a first motor; a film rewind drive mechanism that uses the first motor as a drive source to drive the film in the rewinding direction; a second motor that uses the second motor as a drive source to drive the film; The planetary clutch is driven in the winding direction, and when the second motor rotates in one direction, the second motor and the transmission system are connected, and when the second motor rotates in the other direction, the transmission system is disconnected. a motor control circuit that receives a signal indicating the start of film rewinding and drives the first motor in the rewinding direction and also drives the second motor in the other direction. An electrically driven camera characterized by: