JPS63169626A - Motor-driven camera - Google Patents

Abstract

PURPOSE:To eliminate the interruption of camera driving by providing a 1st motor for shutter charging and a 2nd motor for film winding operation, driving those motors in parallel normally after the completion of exposure and increasing a frame speed, and stopping one motor if the motor becomes defective in operation owing to a voltage drop, etc., and changing the parallel driving into serial driving. CONSTITUTION:A motor-driven camera is provided with the 1st motor M1 for mirror driving and shutter charging and the 2nd motor M2 for winding a film. Then if the winding load of the film 680 increases at low temperature or at the time of a drop in source voltage, an operation detecting means 700 detects that and, for example, the motor M2 is stopped with the output of a motor control circuit 660 connected thereto. At this time, even when the motor deviates from a set rotating speed, it is left in the rotating state as it is a while and even when the operation becomes slow, the parallel driving is carried on to complete the operation of a film driving mechanism 670; when the operation stops, only the motor M1 is held in operation to move a shutter and a movable mirror.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrically driven camera that uses a motor as a drive source to perform various operations.

(Prior Art) In a conventional electrically driven camera, a single winding motor drives both the film winding transmission system and the shutter charge transmission system at the same time. In this case, motor selection, power supply selection, and reduction gear ratio setting were performed for the combined load of film winding load and shutter charging load. That is, the power supply was assumed to have a prohibited voltage, the load was set to the maximum load at low temperatures or the maximum number of frames, and a reduction gear ratio was set so that the motor output at this time could be used to wind the film and charge the shutter. As a result, the reduction gear ratio is generally set to a large gear ratio, causing problems with the speed of the frame being too high even when the battery is new. One idea would be to use a larger battery or a higher-performance motor, but this would increase the size and cost of the camera itself, making it impossible to achieve this.

On the other hand, as an improvement on the conventional proposal, a gear ratio switching mechanism was installed in the reduction transmission system, and the optimal balance of power supply, motor characteristics, and load could be selected by switching the gear ratio. No. 55-17175, JP-A-56-19
It has been filed as No. 4433.

However, in the configuration of this application, since the mechanism related to gear ratio switching is complicated, the number of parts increases, resulting in high cost, and the camera system itself becomes large and expensive.

(Objects of the Invention) It is an object of the present invention to provide an electrically driven camera which can increase the frame speed with a simple configuration and also allows film winding and charging even when the power supply voltage is low.

In order to achieve the above object, the present invention includes a first motor for charging and a second motor for winding the film,
Normally, after exposure is complete, both motors are driven in parallel so that they are superimposed to improve the frame speed, and if a problem occurs with the operation of one of the motors due to voltage drop, etc. It features an electrically driven camera that stops the motor and switches to series drive.

(Characteristics of embodiments corresponding to the present invention) Description will be made based on the block diagram of FIG. 15 and the time chart of FIG. 16. 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 M1 rotates in the forward direction, the planetary clutch 610 engages with the transmission system of the mirror hook drive mechanism 620, and when the first motor M1 rotates in the reverse direction, the planetary clutch 610 engages with another transmission system, and the first motor M1 engages with the transmission system of the mirror hook drive mechanism 620.
The drive transmission system can be switched by switching the rotational direction of the motor Ml. Proceeding with the discussion while the first motor Ml is rotating in the forward direction, the rotation of the first motor to II is caused by the mirror drive mechanism 622 and the shutter charge mechanism 622 in the mirror box drive mechanism 620.
transmitted to.

The mirror drive mechanism 622 causes the movable mirror 6 ll O to swing, and the gloss charge mechanism 624 causes the shutter unit 650 to be charged and released. Based on the operations of both mechanisms 622 and 624, the phase is detected by a phase detection means 630, and the detection result of this means 630 is supplied to a motor control circuit 660, which controls the rotation and stop of the first motor Ml. In addition, the mirror drive mechanism 622 and the shutter charge mechanism 624 obtain a shutter charge release phase in the phase in which the movable mirror 640 is raised and the swinging to the exposure retreat position is completed, and the shutter charge is completed. It is set so that the mirror 640 is lowered just before the drive is completed to obtain a phase in which the swing to the viewfinder observation position is completed.

Based on release start information such as a release button operation signal, the motor control circuit 660 rotates the first motor Ml 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. Moreover, this first motor M 1
In the state in which the shutter charging mechanism 624 is stopped, the shutter charging mechanism 624 has reached a phase that allows the shutter charging of the shutter unit 650 to be released. After that, the shutter unit 650
When the shutter running is performed at , and a shutter running completion signal indicating that the running of the shutter trailing curtain is completed is supplied to the motor control circuit 660, the control circuit 660 again switches to the first shutter curtain.
The motors M1 are rotated in the same direction, that is, in the normal rotation direction. The normal rotation of the first motor M1 drives the mirror drive mechanism 622 again to lower the movable mirror 640, and also drives the shutter charge mechanism 624 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.

Continue in this state until the next release start information is released.
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 rotation of the second motor M2 is transmitted to the film winding drive mechanism 670, and feeds the film 680 in the winding direction. The rotation of this second motor M2 is controlled by a motor control circuit 660, and specifically the shutter unit 65
After a shutter travel completion signal as information indicating the completion of travel of the shutter trailing curtain at 0 is supplied to the motor control circuit 660,
Upon completion of driving another motor (not shown) that performs another job, the second motor M2 rotates and transfers the film 68.
0 winding is performed. When winding of the film 680 is completed, the one-frame detection means detects the state, and the detection result is supplied to the motor control circuit, and the second motor M2 is controlled to stop. be exposed. Thereafter, each time the shutter unit 650 runs the shutter, the film 6 is moved by the film winding drive mechanism 670.
Winding is performed frame by frame.

On the other hand, the output of the phase detection means 630 is detected by the motion detection means 7.
It is also supplied to 00. This motion detection means 630 is
This detects whether the first motor Ml is operating in a preset state, and determines whether shutter charging by driving the first motor M1 is completed within a preset time. The motor control circuit 660 detects whether or not the motor is running, and supplies that information to the motor control circuit 660. The motor control circuit 660 receives information from the motion detection means 700 and controls the second motor M.
Controls the operation of 2. Specifically, when shutter charging is completed within a preset time, the second motor M2 is driven continuously, and the first motor Ml and the second motor M2 are driven in a superimposed manner. However, if shutter charging is not completed within a preset time due to low temperatures, voltage drop, etc., the second motor M2 stops driving,
After the first motor Ml is stopped, the second motor M2 is driven again.

Next, the drive control of the first motor Ml and the second motor M2 will be explained in more detail using the time chart of FIG. 16.

Figure 16(a) shows the case of normal operation,
FIG. 16(b) shows, for example, a decrease in the power supply voltage,
This shows a case in which a countermeasure is taken when the motor drive operation is not performed as preset.

First, referring to FIG. 16(a), the first motor Ml is used to drive the mirror and charge the shutter.
is started based on the output of a shutter run completion signal generated by the shutter unit 650. On the other hand, the second motor M2 for adjusting film winding is started with a delay after the first motor Ml starts driving and until the driving of other motors (not shown) is completed.

Then, the first motor M1 is controlled to stop when the phase detecting means 630 detects the phase at which the gloss charge in the shutter unit 650 is completed, and the second motor M2 is controlled to stop by the l-frame detecting means 690. Stop control is performed at the time when information (signal) indicating the completion of winding for l even portion is output. What is characteristic here is that the first motor Ml and the second motor M2 have overlapping time periods, and a good frame speed can be obtained.

Next, FIG. 16(b) will be explained. This is especially true for film 68, which has a large winding load, at low temperatures and when the power supply voltage drops.
0 and the voltage drop due to the load when driving the second motor M2 is large. That is, this is a case where the shutter churning by the first motor M1 is not completed even after a predetermined time t1, and when the operation detection means 700 detects this state, the motor control circuit 660 temporarily controls the second motor M2 to stop. do. This stop control is performed when the first motor M is activated upon completion of the shutter churn.
This continues until l stops. Therefore, the second motor M2 is driven again by the circuit 660 when the first motor Ml is controlled to stop by the motor control circuit 660, and! Final stop control is performed once the sternum has been rolled up. The unique thing here is that even if the motor is not driven at the set rotational speed due to a voltage drop, etc., it will continue to do so, and as a result, the frame speed will be extremely long. This eliminates the problem of continuing to energize both motors Ml and M2 until the power supply runs out, or the shutter charging and film winding operations are still possible even if the frame speed is slightly slower than normal. For example, even when the voltage drops, the superimposed drive of the first motor Ml and the second motor M2 is stopped, and one of the motors (first motor to
1]), the motor can still be driven sufficiently in many cases, and the motor control method of this embodiment is extremely effective. To explain the features of this embodiment from a slightly different angle, the drive control in which the first motor M1 and the second motor M2 are superimposed as in the present embodiment is switched to series drive control. a mirror box drive mechanism 620 driven by the first motor M1; and a film winding drive groove 670 driven by the second motor M2.
The reduction ratios of the transmission systems for both and can be designed to be small without much consideration for safety, making it possible to make the frame speed extremely high under normal conditions.

〔Example〕

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

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

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

A detachable photographing lens 20 is attached to this camera body 1O. 12 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 50 to be easily removed from the battery storage chamber by removing a member corresponding to the battery cover so that it can be easily removed when replacing the battery. It is configured. Ml is a first motor, and this first motor M1 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 Ml is a second motor, which serves as a drive source for the film winding drive system 400.

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

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

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

In the figure, 40 is a camera body, and although detailed illustration is omitted, the entire body is made of plastic mold. However, in areas such as aperture 4I, especially fl'i I
The parts that require strength are made of metal insert molding. 42a to 42d indicate mounting holes for fixing mirror hooks 60, which will be described later, with screws, 4:3 indicates a spool chamber, and 4.1 indicates P1 to Rone chambers. Reference numeral 50 indicates a film hatron 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. By stopping, the mirror box 60 is firmly fixed to the camera body 40. 70 is a movable mirror, which connects the photographing lens 20 to a finder optical system (not shown).
The viewfinder observation position reflects the subject light that has passed through the camera (mirror down state in Figures 2 and 3 (a)), and the exposure retreat position rotates to direct the subject light towards the film 52 (Figure 3). (b) mirror up state) and 2
It is rotatably supported so that the state can be obtained. 80
is a camera side mount screwed to the mirror box 60, and bayonet claws 81a to 81 are used for bayonet connection with the lens side mount (not shown) of the photographic lens 20.
c is formed.

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 60, and a part of which 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 hook 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 integrated into the spool chamber 13 of the camera body ltO.

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

Reference numeral 101 denotes a main plate fixed to one side (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 into the post 114 of the main plate lot, 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 with the hepos 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 transmits the rotation of the first motor M1 to the transmission gear 106.

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.

Then, 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 Ml to the rewinding gear 201.

The transmission gear 106, which rotates in the counterclockwise direction 51, 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 designates a mirror drive gear that meshes with the worm gear 108 and rotates in the J1 direction.A mirror drive cam 121 is integrally formed on the front side, and a position detection brush (made of conductive material) is provided on the back side. (formation) 122 is fixed. Note that this mirror drive gear 120 is rotatably supported by the post 116 of the base plate 101. Here, the mirror drive cam +21 has a rising cam surface 12 for driving a mirror drive lever 130, which will be described later, in a counterclockwise direction.
1a, a flat cam surface 121b for maintaining the rotational position (mirror up state) of the drive lever +30, and the drive lever 1
30, the downward cam surface 121c allows rotation in the eyebrow direction.
is formed.

Reference numeral 1:30 denotes a mirror drive lever consisting of two levers fixed in an abbreviated shape, rotatably supported by a boss 117 of the main plate 101, and serving as a cam follower of the mirror drive cam 12+. . That is, this 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, and the mirror drive lever 130 receives rotational drive in the counterclockwise direction.
21b to maintain the rotational state in the counterclockwise direction, and also to slide into sliding contact with the downward cam surface 121c (even if there is no actual sliding contact, the one end 131 and the downward cam surface 121
c), 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 the exposure retreat position) operation, continue to push the mirror pin 74 to maintain the mirror up state, release the mirror pin 74 to move the mirror down (rotation return to the finder 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.

The shack charge gear 140 performs one-to-one transmission (reduction ratio 1.0) with the mirror drive gear 120, and is rotatably supported by the boss 118 of the base plate 101. Here, the shutter charge cam 141 has 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.

A shutter charge lever 150 is formed in an abbreviated shape, is rotatably supported by a boss 119 of the base plate 101, 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 at the other end of the shutter charge cam 141 is controlled by the shutter unit described below according to the rotational position of each cam surface of the shutter charge cam 141. One end 3 of seesaw lever 305 in 300
05a to charge the shutter, and continue to push the seesaw lever 305 to maintain the charging operation. (It is possible to mechanically hold both the front and rear shutter curtains in the travel preparation position), the seesaw lever 30
5 is released to return the seesaw lever 305 (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). ).

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 driving phase of the mirror driving bar lgoo by the shutter charging cam 141 and the charging driving phase of the seesaw lever 305 by the shutter charging 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 being 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 7o is 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 7o.
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 releases its charge and also releases the mechanical holding of the leading and trailing shutter curtains at the travel preparation position.

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
61-163 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 to 161 on the signal board 160 is
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. 3(a) above, and shows the phase when the brush 1
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. +62 and the potential of the connector portion (land portion) +62a of the detection pattern +62 changes to the ground level, thereby detecting completion of the shutter turn. 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 tab 5>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. 11(a) is different from that in Fig. 11(a).
), the first motor M1 is controlled to stop (braking), but the first motor M1 cannot be stopped instantaneously, resulting in a slight overrun.
FIG. 3(a) shows the stop position of the first motor Ml in a state where the overrun has occurred. However, as shown in Figure 3 (
For the sake of explanation, the stop position of the mirror drive gear 120 (brush 122) in a) shows the state when the above-mentioned overrun is calculated to be the maximum.In reality, the mirror drive gear 120 (brush 122) stops at a slightly smaller overrun. 120 can be stopped. As is clear from FIG. 3(a), the shutter charge cam 141 is connected to the first motor M! Assuming an overrun, a flat cam surface 1.1 lb is formed to continue the shutter charging completion state to cope with the overrun.

On the other hand, FIG. 4(b) shows the phase in which mirror-up completion is detected, which corresponds to FIG. As shown by the arrow, the sliding part 1 is rotated clockwise from the state shown in FIG. 11(a) to the state shown in FIG. 4(b).
22a switches from contact with both the ground pattern 161 and the operation end detection pattern 162 to non-contact with the detection pattern 162, and the potential of the connector portion (land portion) 162a of the detection pattern 162 changes from the ground level to the initial level (usually Completion of mirror up is detected by changing to H level).

To explain this detection in more detail, the brush 122 is at a position before the state shown in FIG. 4(b) (a position where the brush 122 is rotated counterclockwise from the position shown in FIG. 4(b)) When the sliding part 122a of the brush 122 is in contact with both the ground pattern 161 and the operation completion detection pattern 162, the output of the connector part 162a of the operation completion detection pattern 162 is still connected to the camera. A ground level signal is supplied to the control circuit, and from there the mirror drive gear 120 is
further rotates clockwise, and at the same time, the brush 122 also rotates clockwise and reaches the position shown in Fig. 1(b).
The brush 122 moves to a non-contact state with the operation completion detection pattern 162, the potential of the operation completion detection pattern 162 changes from the ground level to the initial level, and the camera control circuit detects the mirror-up completion state, and the above-mentioned 1st
The rotational drive of motor Ml is controlled to stop.

Note that the position of the brush 122 in FIG. 4(b) described above is different from the position of the brush 122 in FIG. 3(b) described above because the first motor Ml is in the position of FIG. Although stop control (braking) is performed, the first motor Ml 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 overrun described in 2 is at its maximum calculated value, and 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 has a flat cam surface 121b that continues the mirror-up completion state assuming an overrun of the first motor Ml. The overrun is addressed.

Now, to give a more general explanation of the relationship between the shutter charge and mirror up mentioned above, first of all, the important thing is that all the operations, namely the shutter charge and mirror up, and the release of the shutter charge and the permission of the mirror down. All this is done with the first motor M rotating in the same direction. That is, the counterclockwise rotation of the first motor Ml (output gear 10
All operations are performed in a state where the planetary gear 105 is rotating counterclockwise and meshing with the transmission gear 106. Then, the first motor λ
- The rotational force of 11 rotates the mirror drive gear 120 clockwise and rotates the gloss charge gear 140 counterclockwise. Further, when the mirror drive cam +21 in the mirror drive gear 120 is in a position that allows mirror down (FIG. 3(a)), the shutter change gear 1l
The shutter charge cam +41 in the 101st position is at the position where the shack charge is performed (Fig. 3(a)), and
When the mirror drive cam 121 is at the position where the mirror is raised (FIG. 3(b)), the shutter charge cam 141 is at the position where the shutter charge is released (FIG. 3(b)).
b)).

The above-mentioned operation is repeated by the counterclockwise rotation of the first motor M1, and the first motor M1 completes shutter charging ( Figure 3(a))
When the camera control circuit detects the release operation, it rotates again in the same direction.
Next, when the mirror up is completed (Fig. 3 (b)), it stops once again, and then, when the camera control circuit detects the completion of the glossy run, it rotates in the same direction again, and the next shutter charge is completed (the second At the time shown in FIG. 3(a), the sequence of once stopping is repeated. The overrun detection pattern 162 is used to detect that the overrun during the stop operation of the first motor Ml has exceeded a predetermined value.
If the overrun detection pattern 163 changes from the initial level to the ground level at the time of completion of shutter charging in a), or if the detection pattern 163 changes from the ground level to the ground level at the time of completion of mirror up in FIG. 4(b), When the level changes to the initial level, 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 can engage with the mirror drive lever 130. 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 to 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 a shutter base plate forming the support frame, and 301a is an exposure aperture thereof.

; 302 is the rear blade drive lever (hereinafter referred to as Ili as the drive lever) 303. It is a charge lever in the shutter unit 300 for charging 304,
These constitute shutter driving means. Said! 30
The rear drive lever 3 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, which is rotatably supported by a rotating shaft 335 installed on the shutter base plate 301, and is engaged with one end 305a of the shutter charging mechanism shown in FIG. When the roller 152 of the shutter charge lever 150 receives rotational force in the direction of the arrow in the figure, the other end 305b moves as shown in FIG. 6(b).
The foot 302c of the charge lever 302 is rotated in the clockwise direction in the figure through a link lever 306 connected to the link lever 306. Charging is completed by shifting from the state b) to the state shown in FIG. 6(a).

Reference numerals 307 and 308 denote a front tension lever 307 and a rear tension lever 308 that prevent rotation of the light drive lever 304 and rear drive lever 303 charged by the charge lever 302 until a shutter running signal is issued from a camera control circuit, which will be described later. .321 and 322 hold the rear blade group 351 in a parallel link, and are connected to the rotating shafts 326 and 32, respectively.
The rear blade traveling arm rotates around 7 to travel the rear blade group 351, and 323° and 324 are the leading blade group 3.
The leading blade group 352 is held by holding the blades 52 in a parallel link and rotating around the rotating shafts 328 and 329, respectively.
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 charging 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 are engaged with the Nyatsuta main plate 301 at the rising part of the L shape by engagement of pins and long grooves to guide upward and downward movement. is made, and the 17-shaped leg 3/11a,
342a, the seesaw lever 305 and the lever 331.
332, so that linked movements of upward movement and downward movement are provided.

The guide mechanism includes a guide pin 37 installed in the shutter base plate 301 that fits into and engages long grooves 341b and 342b formed in the vertically extending portions 341c and 342c of the light-shielding blades 341 and 342, respectively. It consists of

With the above configuration, the light shielding blades 341 and 342 are moved from FIG. 6(b) to
By performing the upward movement shown in Fig. 6(a) and rotating the seesaw lever 305 clockwise, Fig. 6(a) → Fig. 6(
b) The downward movement is performed, and each light shielding blade 341
．． 342 and the rotating shaft 331 of the seesaw lever 305.
By changing the connection position with 332 by a certain amount, the upward and downward strokes thereof 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. Reference numerals 380 and 386 are armature levers for the leading blade and armature lever for the trailing blade, respectively, and yokes 382 and 38 are 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.
, 386. This is a stopper pin that restricts the initial rotational position of . One end 380a of the armature lever 380 is rotated a predetermined distance counterclockwise from the initial rotation position shown in FIG.
The tension can be released by contacting with. 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 sucked and rotated against springs 384 and 394, respectively. In the figure, 370a indicates the shutter charging state (Fig. 6(a)
)) is a 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 from FIG. 6 due to its complexity, the rear tension lever 308 is biased clockwise by a weak spring so that the pin 308a comes into contact with the inner edge of the notch 370b. is set to . In addition, in Figure 2, 392
is a cover that doubles as protection and electromagnetic shielding.

In the above, the operation of the two consecutive shutter units will be explained.

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

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

As the charge lever 302 rotates, the foot portions 302a and 302b of the charge lever come into contact with the roller portions 303a and 304a of the drive lever 303 and 304, respectively.
A rotational movement is imparted to the drive levers 303,304.

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 upwards in the middle,
In the fully charged state, it moves to the position shown in FIG. 6(a) and covers the lower part of the exposure opening 301a of the shutter base plate 301.

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

Next, the release operation will be explained.

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

Next, the seesaw lever 305 is rotated clockwise in the drawing by the spring member 360, and the link lever 306 gives counterclockwise rotation to the churn 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 341 and the light shielding blade 342 rotatably attached to the seesaw lever 305 by 31 and 332 are connected to the guide pin 3 by the respective guide long grooves 341b and 342b.
71 and is moved downward while maintaining a nearly horizontal state in the figure, moving from the state of FIG. evacuate to.

The camera control circuit detects when the above operation is completed and the mirror up is completed (in the state shown in FIG. 4(b), it detects that the potential of the mirror up detection pattern 162 changes from the ground level to the initial level. ) Then, the camera control circuit first energizes the coil 383 shown in FIG. 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 description so far has been about the mirror box drive mechanism 100 and the shutter unit 300 that are built into the mirror box 60.

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

In FIG. 2, FIG. 3, and FIG. 5, 201 is a rewind gear, which is rotatably supported by a hole in a base plate 210 and a boss 212a of a base plate 212 that unitize the film rewind drive mechanism 200. Note 1. This base plate 210
is placed in the camera body 40 above the cartridge chamber 44 in FIG.
0 to the camera body is sometimes performed using the rewind gear 2.
01 is arranged and set at a position where the planetary gear 105 can engage 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 fixed to the lower part 201a of the rewinding gear 201.
It is movable independently in the thrust direction relative to the rotor, and is supported so as to be interlocked in the rotational direction. The coil spring 203 serves to constantly bias the rewinding fork 202 downward, and
When loading the cartridge into the cartridge chamber 44, the chain unwinding fork 202 can move upward against the coil spring 203. 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 lOO also serves as a drive source for the film rewind drive mechanism 200. However, the rotation direction of the first motor M1 during the film rewinding drive is clockwise rotation as shown in FIG. 5(b). That is, when the first motor M1 rotates clockwise, the sun gear 104 rotates clockwise via the output gear 102) and the reduction gear 103, and the planet gear 105 revolves clockwise due to the friction of the coil spring 111 and winds. It meshes with the return gear 201.

Then, when the planetary 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 M1 is transmitted to the rewinding gear 201 by rotating in the direction shown in FIG. 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 disposed inside the spool 401, and a motor pinion (output) J gear 404a is configured as an output.

405 is a transmission gear that meshes with the motor pinion 404a;
4106 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 a two-stage gear structure including a large gear 406a that meshes with the transmission gear 405, and a small gear 406b that constantly meshes with planetary gears 411 and 413, which will be described later. Reference numeral 412 designates a spool-side planetary lever, which is rotatably supported on the same axis as the sun gear 106, and frictionally coupled to the sun gear 406 by a coil spring or the like, so that it rotates according to the rotation of the sun gear 406. and is configured to swing in the direction of rotation. The spool-side planetary lever 412 also has the small gear 406 at the swing end position.
A spool-side planetary gear 411 that meshes with b is rotatably supported. A sprocket-side planetary lever 414 is rotatably supported on the same axis as the sun gear 406, and is frictionally coupled to the sun gear 406 by a coil spring or the like, and rotates in response to the rotation of the sun gear 406. , and is configured to swing in the direction of rotation. Further, the sprocket-side planetary lever 414 has a sprocket-side planetary gear 413 that meshes with the small gear 406b rotatably supported at the swing end position. 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, so that the sun gear 406 rotates counterclockwise and the spool side planetary lever 412 rotates.
When the sun gear 406 is swung counterclockwise, the spool-side planetary gear 411 and the large gear 409a of the transmission gear 4090 mesh with each other, and as the sun gear 406 rotates clockwise, the meshing is released. 410 is the small gear 40 of the transmission gear 409
9b is a spool gear that meshes with the spool 40.
The spool 401 is fixed to the spool 401 by the first engaging protrusion 401b, and the spool 401 is rotated.

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 designates a holding switching member that can obtain two states, ie, a state in which the holding lever 415 is held and a state in which the holding is released. A protrusion 416b that is pushed when the back cover 430 is opened and closed, which will be described in , and an abutment pin 416C that is in contact with a biasing spring 440 are formed, and the whole body is rotatably supported in the open state.

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. A first pattern portion 420a whose entire circumference is ring-shaped is formed near the center on the lower surface of this rotary substrate 420, and a plurality of radial patterns connected to the first pattern portion 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 board 420 to convert the rotational state of the sprocket 402 into electrical pulse signals, and the sliding brush 422 is the first
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 machine tM4 explained above with reference to FIG.
00, the spool-side planetary gear 411 starts from the sun gear 406 that rotates due to the rotation of the second motor M2.
→Transmission gear 409→Spool gear 410→Spool 40
1, the first winding transmission system rotates the spool 401, and the sprocket 402, starting from the sun gear 406, as shown in FIG. A second hoisting transmission system is configured to rotate the. The circumferential speed ratio of the spool 401 by the first winding transmission system is set to be thicker than the circumferential speed ratio of the sprocket 402 by the second winding transmission system. The first winding transmission system 411, 409, 410, and 401 includes a sun gear 406, a spool side planetary gear 411, a spool side planetary lever 412, and a transmission gear. A first planetary clutch consisting of 409 and the same (the second hoisting transmission system 413
, 407, 408, 402 have a sun gear 406. Sprocket side planetary gear 413. Sprocket side planetary lever 4
14 and a transmission gear 107 constitutes a second planetary clutch.

Next, the operation of the film winding drive machine JF4400 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, swinging both planetary levers 412 and 414 counterclockwise, and moving 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 moved beyond the position shown in the figure by the biasing force of the spring 440. The extensible protrusion 430 of the back cover 430 is set so as not to be deformed much by the biasing force of the biasing spring 440, but naturally the above-mentioned holding/switching member 416 is set to allow a slight counterclockwise rotation due to elastic deformation. This figure 9 (a) and the figure 9 (e
) The back cover detection switch 480 described in
．． The open/closed state of the back cover 430 can be detected by the conduction or non-conduction of 482.

Note that by winding the film by a predetermined even amount in the state shown in FIG. 9(a), the film leader portion 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 small gear 406b of the sun gear 406 rotates clockwise to swing both planetary levers 412) and 414 clockwise. Therefore, the spool side planetary gear 41
1 is disengaged from the spool side transmission gear 409 (large gear 4o9a), 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.

In FIG. 9(d), the second motor M2 is rotated counterclockwise again to rotate only the spool 401 by one frame of film 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 loose lever 412 swings counterclockwise, and the spool side planetary gear 411 is connected to the spool side transmission gear 409 (large gear 409a). ) to rotate the spool 401 in the winding direction. 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
Also when the small gear 406b of No. 6 rotates counterclockwise.

Unable to swing, sprocket side planetary gear 413
The sprocket-side transmission gear 407 is held in a disengaged state. Therefore, if this ninth
If the leader portion 56 of the film 52 is already securely wound around the outer periphery 401a of the spool 401 in the state before FIG. The film is further wound by one frame, and the sprocket 402 rotates as the film moves.

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

FIG. 9(e) shows 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 +01 is rotated and the sprocket 402 is free, so it is easy to detect whether or not the sprocket 402 is rotated by the film 52 in this state. It is characterized by the ability to judge the success or failure of AL.

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

Next, based on FIG. 1O, the photographic lens 2 shown in FIG.
The electric diaphragm mechanism 500 configured within 0 will now be described. In the figure, M3 is a third motor, which is fixed to a fixed cylinder (not shown). 510 is a ring-shaped fixed ring, and a plurality of holes 5 are formed at equal intervals on the circumference centered on the optical axis O.
12 are formed.

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

Reference numeral 530 denotes an aperture blade, which is disposed between the fixed ring 510 and the aperture drive ring 520, and the bottles 532 and 534 implanted on both sides of the blade 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 gear cylinder 540, and this toothed portion 542 meshes with the output gear 502 fixed to the output shaft 504 of the third motor M3.

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

In other words, the diaphragm is driven 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 the aperture drive ring 520 also rotates counterclockwise accordingly, causing the aperture blade 530 to engage with the cam hole 522. It is driven in the opening direction (clockwise) by sliding. 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).

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

DC/DC converter CON control terminal J terminal CNT
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 (nonvolatile memory) capable of high-speed arithmetic processing, ADI is an A/D converter, and R1 and R2 are resistors. BUSI is microcontroller M
This is a path line for communication between C2 and the A/D converter ADI. Resistors R1 and R2 are connected in series so as to divide the voltage of the power supply battery BAT, and input it to the input terminal IN of the A/D converter ADI. The A/D converter ADI performs A/D conversion on this voltage and transmits the converted value to the microcomputer MC2 through the pass line BUSI.

SPD is a silicon photodiode that measures 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. A D2 is an A/D converter for A/D converting the output of the amplifier AMP. Output terminal OUT of width filter AMP and A/D converter AD2
is connected to the input terminal IN of. BUS2 is ~/
This is a pass line for communication between the D converter AD2 and the microcomputer MC2, and the A/D converter RgAD2 is the pass line B.
The photometric value is sent to the microcomputer MC2 through US2. A
/D converters ADI, AD2, amplifier A M P, and microcomputer MC2 are powered by DC/DC converter CON.
The circuit operates by being supplied with a stable 5V voltage output from the circuit. Therefore, when the DC/DC converter CON stops voltage conversion operation, the circuit is in a non-operating state.

SEP is a switch linked to the back cover of the camera (back cover detection switch 480 shown in FIG. 9); when the back cover is closed, the circuit is turned off, and when the back cover is opened, the circuit is turned on. S.R.W.
is the rewind button 14 used to rewind the film.
(See FIG. 1), and is normally off, but turns on when the rewind button 14 is pressed.

S W 2 is a switch linked to the release button 12 (see FIG. 1), which is normally off and turned on when the release button I2 is pressed.

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

Switches 5I3P, SRW, SW2 are microcomputer MCI
Input port PI, P2. P3 and microcomputer M
C2 input port P5. P6. They are connected to P7, respectively, so that both microcomputers MCI and MC2 can independently detect whether they are on or off. The switch 5CN2 is connected to the input port P8 of the microcomputer MC2, so that only the microcomputer MC2 can detect on/off.

BUS3 is a path line for communication between microcomputer MCI and microcomputer MC2. 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. DI? is a display driving integrated circuit (hereinafter referred to as IC) connected to the display device DISP and for driving the display device DISP. DR of the display driving IC and the microcomputer MC2 are connected by a pass line BUS4, and display information is transmitted from the microcomputer MC2.

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

The microcomputer M C1 and the display driving ICDR are powered by a power source battery BA or a DC/DC converter CO.
diodes Dll and DI2 from either of N, respectively.
is supplied through. Therefore, the camera is powered by a battery B.
The circuit is constantly operating while the AT is attached.

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 shack.

Coil MG31 is connected to the collector of transistor TRI, and coil MG32 is connected to the collector of transistor TR2. The base of the transistor TR+ is connected to the output port P of the microcomputer MC2 via the base resistor R3.
Similarly, the base of the transistor TR2 is connected to the output port P14 of the microcomputer MC2 via a base resistor R4. The microcomputer MC2 has an output port P13. By outputting a signal from P14, the shack time can be controlled.

Also coil MG31. MG32 is also used as an actual load resistance when checking the voltage while the shutter is locked to prevent it from running, but this control is also performed using the output capo-i/P.
I3. Microcomputer MC2 is activated by signal output from PI4.
It is possible to do this.

M2 is a second motor for winding the film (see especially FIGS. 8 and 9), and one end of both terminals of the second motor M2 is connected to a PNP transistor TR15, an NP
The collector of the N transistor TR16 is connected to the other end, and the collectors of the PNP transistor TR18 and the NPN transistor TR17 are similarly connected to the other end. The bases of the transistors TR15, TR16° TR17, TR18 are connected to base resistors R15, R16, R17, respectively.
, R18 to the output port P15. of the microcomputer MC2.
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 has an output port P15. P16. By outputting a signal from P17°R18, the second motor M
2 can be freely operated in forward and reverse rotation.

For example, output port P15. By outputting a high level signal from P16 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. 2 motor M
2 rotates forward.

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 i' R15 and "I' R17
When turned on, current flows from right to left and the second motor M2 rotates in reverse.

M1 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) NPN transistor T
The collector of R21 is connected.

Transistors TR19, TR20, TR21, TR22
Each base has a base resistance RI9. R20,
Output capo-1- of microcomputer MC2 via R21°R22
P19° is connected to R20, R21, and R22.

The emitters of transistors TR19 and TR22 are power supply type/
Connected to the (+) side of IIBAT, transistor TR2
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 R20, R21, and R22, the first motor M1 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 the switch SMI is connected to the input port P9 and PIO of the microcomputer MC2, and the microcomputer MC2 can detect the on/off signal 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 shutter. corresponding),
Since the signal from switch SM2 is connected to the input port pH, R12 of microcomputer MC2, microcomputer MC2
can detect on/off signals accompanying the unidirectional rotation of the first motor Ml.

TR3 is used to switch between supplying and stopping the power supply to the third motor M3 for driving the aperture on the lens side through the mount contact (a contact type contact placed on the other side of the camera mount part of the camera body and the lens mount part of the photographic lens). switching transistor, R6 is the base resistance of the transistor. The base of the transistor T R3 is the base resistor R
6 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. R
5 is a transistor TR when the microcomputer MC2DC/DC converter COH is in the off state and the power supply is stopped.
A resistor to keep 3 in the off state, the power supply battery BAT
The transistor TR3 is provided between the (+) side terminal of the transistor TR3 and the base of the transistor TR3 via a 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 closes the aperture blades (see Figure 10). or opened.

One end of the two terminals of the third motor M3 is connected to the collectors of a PNP transistor TR23 and an NPN transistor TR24, and the other end is similarly connected to the collectors of a PNP transistor TR26 and an NPN transistor TR25. . Transistor TR23゜TR24
, TR25, and TR26 are each connected to a resistor R2.
3, output port P23 of microcomputer MC3 via R24, R25, and R26. Connected to 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 BAT via the mount contact between the camera and lens.
Connected to the (-) side of the

The microcomputer MC3 has an output port P23. P24. Outputs a signal from P25°R26 and rotates the third motor M3 forward.

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 pass 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 move the aperture blades to an open position. (The third motor M3 can be commanded to be driven in the reverse direction.)

Further, the microcomputer MC3 is supplied with power through the mount contact from the power source battery DAT or the DC/DC converter CON through the diodes Dll 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 E2FROM, the camera can be configured to perform automatic rewinding.
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 l. The process will be explained below according to the flowchart.

[Step 1] 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 microcontroller MC2 and photometric amplifiers AMP and A.
Power is supplied to the /D converters ADI and AD2.

[Step 2] Read the back cover switch SBP to check whether the back cover 430 is open or closed. When the back cover is open, the process branches to step 3, and when the back cover is closed, the process branches to step 5.

[Step 3] Check flag X, which is a flag that stores the previous open/close state of the back cover. When flag X is 0, it indicates that the back cover is open.

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

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

[Step 5] If the flag X is 0, the process branches to step 6; if 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 switch SRW to check whether the rewind button 14 is pressed. If the rewind button 14 is pressed, go to step 9.
If it is not pressed, the process branches to step 8.

[Step 8] The state of the release switch SW2 is read to check whether the release button 12 is pressed. If the release switch SW2 is on, the process branches to step 9, and if it is off, the process branches to step 1°.

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

[Step 10] Determine whether or not the DC/DC converter CON is currently on, and turn on the DC/DC converter CO.
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 linked to the rewind button 14 or the release switch S~v2 is turned on.

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

[Step 12] The command from microcomputer MC2 is DC/D
When the command is to turn off the C converter C6N, go to step 13.
If it is not a command to turn off the DC/DC converter CON, the process returns to step 11 and waits until a command to turn off the DC/DC converter CON arrives.

[Step 13] Output a low level signal to output port P4, turn off DC/DC converter CON, and turn off DC/DC converter CON.
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 uses DC/DC when the power is turned on, when the back cover switch SBP changes from on to off or from off to on, and when the rewind switch SRW and release switch SW2 are turned on. The DC converter CON is operated, and the microcomputer MC2), the photometric amplifier AMP, and the A/D converter AI) ], A D
After supplying power to the microcontroller MC2, the DC/
Until the DC converter off command is received, the DC/DC converter CON is turned on, and the microcomputer MC2 turns on the DC.
When receiving the command to turn off the DC/DC converter CON, an operation is performed 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. In addition, microcomputer M
From the moment the CI turns on the power battery BAT, it operates constantly.
The reason why the microcomputer MC2 is configured so that it is supplied with power and starts operating only when the DC/DC:I:/verter CON is on is to reduce power consumption so that the microcomputer MCI only has to perform the task of detecting switches. This is because the microcomputer MC2 is assumed to be a low-speed power type microcomputer, and the microcomputer MC2 is assumed to be capable of high-speed processing with high power consumption.

FIG. 13 is a flowchart showing the 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 ■ that stores the previous open/close state of the back cover. When the flag ■ is O, it indicates that the back cover is open. If the flag I is 1, the process branches to step 16; if the flag I is 0, the process branches to step 20. Regarding the memory contents of microcomputer MC2,
E2 whose memory contents will not be lost even if the power supply is stopped
There is no problem because it has FROM (non-volatile ROM) type memory. In addition, even if you do not have E2F ROM type memory, it is a well-known method to back up the memory using an external button-type lithium battery and save the memory contents even if the power supply to the DC/DC converter CON is interrupted. Conventional techniques may also be used.

(Step +6) Since the back cover has changed from the closed state to the open state, flag I is set to 0 to remember that the back cover is open.

[Step +7] The contents of the film counter are stored in the memory, and the memory of this film counter is set to O.

[Step +8] Check the flag that remembers the previous open/close state of the back cover. If flag I is 1, step 2
0, and if the flag ■ is O, the process branches to step 19.

[Step 19] Since the back cover has changed from the open state to the closed state, flag I is set to 1 to remember that the back cover is closed. 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 2 ■.

[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 contents of communication from the outside are stored in E2FROM.
Determine whether it is an instruction to rewrite flag Z, and
If it is a rewrite command, 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 the automatic rewind prohibition mode or set flag 2 to 1 to set the automatic rewind mode.
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 1801 Set flag Z of E2FROM to O, 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 converters CO and N, thereby cutting off the operating power of the microcomputer MC2, and the process ends.

Next, the flow will be explained regarding the loading sequence shown in FIGS. 13B and 130. 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 24L] [Step 25]A.

Set each flag G and C to O.

[Step 26] Perform a voltage check. Check the voltage of the shutter control electromagnet coil MG31, M
G32 is energized for 10 milliseconds, and the voltage is converted to A/D converter A.
This is done by reading from the DI, 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 output port P15°PI6.
PI3. This is done by the signal output from r'18. 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 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 repeatedly turns on and off (the output of the sliding brush 4271 is at the initial level and the ground level (repeatedly) is input, and if the on and off signal is input repeatedly, the microcomputer MC2 will rotate the sprocket 402. 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, the process goes to step 33. is 0
When this happens, 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 human power state of the input port P9 has changed, the flag A is newly set to O.

[Step 35] Count the energization time of the second motor M2 and restart the timer 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, and when there is no change in the input port for a predetermined second (for example, 350 milliseconds) If it is determined that the sprocket 402 is stopped, the process proceeds to step 37, and if 350 milliseconds has 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] 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. The signal input manually to input port PIO is 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) when winding corresponding to the film-sternum is completed. Further, when winding of the next film (sternum) 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 when 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 O in step 39, the process branches to step 39.

[Step 39] Compare the previous state of input port PLO with the current state. If the value has changed, the process returns to step 40; if the value has not changed, the process returns to step 30.

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

[Step 411 The previous state of the human power port P10 and the current state are compared. 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 P10 has changed, the flag C is newly set to O.

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

[Step 44] 3 empty windings during autoloading
Check if the piece is finished. If after finishing 3 frames, go to step 48; 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 moke M2 is stopped.

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

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

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

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

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

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

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

Specifically, the second motor M2 once again rotates in the normal direction (Fig. 8,
As shown in FIG. 9(d), the sun gear 406 rotates counterclockwise again. However, in this state, Fig. 9 (d
), the rotation of the second motor M2 is not transmitted to the sprocket 402 but to the spool 401. Therefore, in such a sprocket-free state, 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 l-402. For example, if the autoloading is successful, but if the sprocket 402 is not rotating, then the autoloading has failed because, for example, the film leader part 64 is not wound properly around the spool 401. can be determined.

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

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

(b), as shown in FIG. 5(a), the first motor M'1
When the sun gear 104 rotates counterclockwise, the counterclockwise rotation state of the sun gear 104 is started.

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

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

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

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

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

For reference, the relationship between the manual 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 M1 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 P12 remains off (initial level) when the shutter charge is completed, the overrun amount is within the set 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 the input port p 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 energizing the first motor Ml. If 9500 milliseconds have elapsed, go to step 58; if 500 milliseconds have not passed, go back 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 port p
Since H is turned on, in step 61 the input port pH
Check the mirror down (shutter charge)
If 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. Also, 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, which are used for later processing, are cleared to O.

[Step 66] Check the battery voltage BAT.

The method is the same as step 26 of the autoloading sequence, so we will omit the details (If the battery is sufficient, proceed to step 68; if the voltage is low, proceed to step 67.

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

[Step 68] It is checked whether the movable mirror is in the phase where it is down (shutter charging completed), and if the mirror is correctly down (shutter charging completed), the process branches to step 76. If the movable mirror is not correctly down (or stopped midway (shutter charge stopped midway)), the process branches to step 69.

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

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

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

[Step 72] Check the timer that measures the time since the first motor Ml is energized. If one second has elapsed, the process returns to step 73; if one second has not elapsed, the process returns to step 7I.

[Step 72] Since the mirror drive was not completed within the second second, it is determined that an accident has occurred and the energization of the motor Ml is stopped.

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

[Step 75] Mirror down (shutter charge)
Since this has been completed normally, the energization of the first motor Ml 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 reversing l. 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 Ml.

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

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, the flag l\ is l
If flag A is O, the process branches to step 81.

[Step 813: Compare the previous state and current state of input port P9. If it has changed, the process branches to step 82; if it has not changed, the process branches to step 86.

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

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

[Step 84] Since the input state of input capo-1-P9 has changed, flag 8 is newly set to 0.

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

[Step 86] Check the timer that counts the energization time of the first motor Ml, and if there is no change in the input port for 350 milliseconds, it is determined that the sprocket 402 is stopped, and the process proceeds to step 87. , 350 milliseconds have not yet elapsed, the process branches to step 90.

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

[Step 88] Check whether rewinding is completely completed. If the frame counter is 0, the process branches to the above-described empty charging 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 PIO. When the flag C is 0, the state of the previous 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 PlO is a signal linked to the sprocket 402 as described above, and the switch is turned on when the rewinding corresponding to film equalization is completed.

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

[Step 91] The previous state of input port PIO is compared with the current state. If it has changed, the process advances to step 92; if it has not changed, the process returns to step 80 and continues rewinding.

[Step 92] Since the input state of the input capo-1-pto has changed, the flag C is newly set to 1. Then step 8
Returns to 0 and then continues 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 O.

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

Next, the release sequence shown in FIG. 13E will be explained. As explained in the processing flow after power supply, the release sequence performs processing when the release 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 100] Check the voltage again. The voltage is checked, and if the voltage is quite high, the process branches to step 1O1, 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 V. However, when Vo<4 volts, branch to step 102, and when Vo>4 volts, branch to step 101.

[The flag E, which is a flag indicating that the step toB 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 Ml is started.

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

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

[Step 106] The flag E, which is a flag that stores the voltage level, is checked. If the voltage is high, the process branches to step 108, and if the voltage is low, the process branches to step 107.

[Step 107] If the voltage is a little 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 1.11, and if the mirror up is not completed, the process branches to step 110.

[Step +10] Check the timer that measures the time since the first motor M1 is energized.

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

[Step 112] Since the mirror-up operation has not been completed within 500 milliseconds, it is determined that an accident has occurred, and the energization of the first motor M1 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 Ill: Since the input port pH is turned off and the mirror up is completed (shutter charge is released),
The power supply to the first motor Ml is stopped.

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

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

[Step 201] Check the input port P12. As described in detail in the explanation of the empty charge sequence (Fig. 13c) above, if the overrun amount when mirror up is completed is within the set range, input port P12 is turned on and the process branches to step 114 to perform normal operation. However, when the overrun amount exceeds the set range, the input port P12 is turned off and the process branches to step 202 as an abnormal state avoidance sequence. Here, overrun m
To explain the problem when
20 may further rotate clockwise, and in the worst case, 12
1b and 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 M1 is energized again in the normal rotation direction. As a result, the mirror drive gear 120 rotates clockwise again, and the movable mirror 70 rotates by sliding between the mirror drive cam 121 and the mirror drive lever 130.
mirrors down once and then continuously mirrors up again. Further, the shutter charge gear 140 also rotates counterclockwise again, causing the shutter charge lever 150 to rotate for charging and for charging release. However, even if the shutter charge lever 150 rotates again in this state, the shutter unit 300 will only be charged empty and will not be adversely affected in any way.

[Step 203] Wait for 50 milliseconds, which is enough time for the brush 122 shown in FIG. 4 to slide at least on the operation end detection pattern 162, before the first motor M1 is restarted. Then, return to step 109 again and when mirror up is completed (input port I'll is off)
Then, in step 111, the rotation of the first motor Ml is stopped. In this state, if the overrun amount falls within the set range, the process advances to step 114.

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

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

[Step 118] Switch 5 linked to completion of trailing curtain travel
Determine whether CN2 is on or off. If it is off, the process remains at step 118 and waits until the switch is turned on.

If it is on, it means that the trailing curtain has completed running, so the process branches to step 119.

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

[Step 120] Check the voltage again. This voltage check has the same meaning as the voltage check in step 100, and as a result, when the voltage is high (for example, Vo > 4 volts), the process goes to step 121, and when the voltage is low (for example, V
. (4 volts) branches to step 122. To check the voltage, as described above, the leading curtain coil MG31 and the trailing curtain coil MG32 are simultaneously energized for 10 milliseconds, and the voltage during the energization is checked.

[Step +21: Set flag 1 to 1 to indicate that the l voltage is high.

[Step 122] Flag E is set to 0 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 M1 is started.

[Step 124] Start timer #2, which is a timer that counts the energization time of the first motor M1.

[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 blade 530 of the lens to the open position.

[Step 129] Communicates with the lens microcomputer MC3 to check whether the aperture has been returned to the open position. 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 to wind up the film-sternum.

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

[Step 132] to [Step 135] Clear the discrimination flags used in the following processing, and set A=O, B=0°C=O
, 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 shutter has finished charging, so proceed to step 13.
Go to 7, if it is off, the mirror is not fully down, so step 1
Branch to 42.

[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 flag B is 0, the process branches to step 151; if flag B is 1, the process branches to step 139.

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

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

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

After that, the process branches to step 151.

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

[Step 143'l First motor M for driving the mirror
Since one second has passed without the camera being able to complete the mirror down or shutter charge, the first winding motor Ml is stopped and only the first motor Ml is operated independently to complete the mirror down and shutter charge. Do it first. At this time, if the second winding motor M2 has already stopped, the process branches to step 146.

[Step 144] A flag E storing the high/low state of the battery voltage BAT is checked, and if the voltage is high, the process branches to 146.

[Step 145] Determining the status flag B When the status flag B is 11, that is, the first motor M1 for driving the mirror is in operation, the process returns to step 136 and waits until the mirror down is completed. When the status flag B is O, that is, when the second winding motor M2 is also operating at the same time, the process branches to step 204.

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

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

[Step 148] A second winding motor M2;
Since it could not be driven simultaneously with the first motor Ml for driving the mirror, the second motor M2 for raising the sweep is stopped.

[Step +49] First motor N' for mirror drive
Restart timer #2, which counts the energization time of tl.

[Step 15] Set the status flag B to 1 and set the 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).

[S, Chip 204] It is checked whether the first motor Ml for driving the mirror (for shutter charging) is in operation, and the process branches to step 151 when it is in a stopped state, and to step 154 when it is in an operating state. In this step 204, in the abnormal state avoidance sequence in subsequent steps 205 to 208, the first motor Ml for driving the mirror is rotated one more rotation in the event of an abnormality, and as a result, the operation of the second motor M2 for winding is completed. This step was inserted because the first motor M1 for mirror driving (shutter charging) may end later.

[Step 1511 Check whether the second winding motor M2 is in operation or stopped. If it is in operation, the process branches to step 154; if it is stopped, the process branches to step 152.

[Step 152] Check the memory F that stores how many times the input signal of the input port P9 is switched on and off while winding one frame. If the film is switched only four times or less during one frame winding, the film is switched immediately (or at the same time) after the second motor M2 was stopped by the one frame winding completion signal (input port PLO) during the previous winding. is pushing forward,
When the driving force of the second motor M2 disappears, it is determined that the sprocket 402 has moved back a little in the rewinding direction, and the process jumps to the rewind mode (step 64) described above. On the other hand, when the on/off switching signal is input more than four times, the process branches to step 205.

The meaning of step]52 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. Further, this problem also occurs due to variations in m in the idle feed during autoloading.

Also, since the base of the film 52 itself is a synthetic resin sheet,
It is also known that it can be slightly elongated by stretching. Therefore, even if it is possible to wind one frame of the film 52 near the last frame that can be photographed, the film 52 is actually stretched slightly before the winding of the first frame is completed (the film cartridge 50 is already stretched). All of the film 52 wound around the cartridge 5o is fed in the direction of the spool 401, and even if an attempt is made to wind up the film 52 by rotation of the spool 401, the film 52 cannot be pulled out from the cartridge 5o. , l may be possible because the film 52 has been stretched. In such a case, the second motor M
When the winding driving force of the spool 401 is lost at the stop of step 2, the film 52 shrinks due to its own return force, and the sprocket 402 rotates slightly in the rewinding direction due to engagement with the film perforation 54. . Therefore, when winding for the next frame is carried out next time, a 1-frame winding completion signal is input to the input port PIO before winding l evenly, and in reality, the proper 1-frame winding complete signal is input to the input port PIO. In some cases, an output signal indicating that one frame of winding has been completed is generated even though one frame of winding has not been completed. In the conventional sequence, shooting is OK even in such a case, but there are cases where the exposure is the next equal amount, resulting in double exposure that the photographer did not intend, and no matter how many times the film is wound, the film is This caused a problem in which it was not possible to detect tension (end of film). Step 152 of this embodiment is a step inserted in order to solve the above-mentioned conventional problem. A predetermined number of on/off switching signals to the port 9 (in the example, this predetermined number was set to 4 times, but theoretically, the on/off switching signal output when winding one frame in normal conditions) ), it is determined that the film 52 is already in a stretched state, and the auto rewind mode for rewinding is activated (step 64).
The conventional problem was solved by jumping to a step.

Next, a case will be described in which the overrun amount of the first motor Ml at the completion of the shack charge (mirror down) in steps 205 to 208 exceeds a predetermined amount.

[Step 205] Check the input port P12. As described in detail in the explanation of the empty charging sequence (Fig. 13C) above, if the overrun amount at the completion of shutter charging (mirror down) is within a predetermined range, PI3 is turned off and the step is stopped. 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). Mirror driven cam in the worst case!
21 and one end 131 of the mirror drive lever 130, the movable mirror 70 rotates in the upward direction (toward the exposure retracted position), making it impossible to obtain a proper viewfinder observation state. This also causes problems such as the inability of the subject light to properly enter the AF light-receiving element (not shown). Also, of course, shutter charge gear 1
40 may also rotate further counterclockwise,
In the worst case, the flat cam surface 141b of the shutter charge cam 141 and the roller 15 of the shutter charge lever 150
1 comes out of sliding contact with the cam surface 14.1, and the cam surface 151 descends.
Corresponding to c, the shutter charge lever 150 rotates in the charge release direction (clockwise), and the shutter unit 300's churn lever 302 loses its tension before the shutter runs, reducing the impact resistance performance of the shutter unit 300. This creates a problem that can cause problems.

[Step 206] The first motor Ml is energized again in the normal rotation direction. This allows the mirror drive gear! 20 rotates clockwise again, and the movable mirror 70 is moved by sliding between the mirror drive cam +21 and the mirror drive lever +30.
When the mirror is once raised and then continuously lowered again, the shutter charge gear 140 also rotates counterclockwise again, causing the shutter charge lever 150 to rotate to release the charge and rotate to charge. However, even if the shutter charge lever 150 rotates again in this state, the shutter unit 300 will not be adversely affected at all.

[Step 207] When the first motor Ml is re-operated, the brush 122 shown in FIG.
Wait 5 milliseconds.

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

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

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

[Step 154] 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 human power port P9 is memorized as the switch-on state, and when flag A is 1, the previous state of input port P9 is memorized.
The state of 9 is memorized as the 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 repeatedly turned on and off several times (for example, 12 times) while winding a uniform amount of film. If the signal is being input repeatedly, the microcomputer MC2 determines that the sprocket 402 is rotating, and if the repeated on/off signal has stopped, the microcomputer MC2 determines that the sprocket 402 has stopped. In step 154, when flag 8 is 1, the process branches to step 157, and when flag A is 0, the process branches to step 155.

Immediately after the feeding sequence operation, flag A is set to O 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] Similar to step 156, compare the previous state and current state of input port P9. If there is a change, proceed to step 158; if not, proceed to step 16.
Branch to 1.

[Step 158] Since the input state of input port P9 has changed, flag A is newly set to 0.

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

[Step 161] Since there was no change in P9, check the timer that counts the energization time of the second motor M2, and if there is no change in the input port for 350 milliseconds, the sprocket 402 stops. If the 350 millisecond period has not yet passed, proceed to step 162. [Step 160] Since the input state of input port P9 has changed, turn input port P9 on/off. The memory F that stores the number of switching times of the switching signal is incremented.

[Step 162] Flag C, which is a flag for storing the previous state of input port P10, is checked. When the flag C is 0, the previous state of the input port PIO is stored as a switch-on state, and when the flag C is 1, the previous state of the input port PIO is stored as a switch-off state.

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

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

[Step 164] 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 port PIO and
Compare with the current state. If it has changed, step 16
6, and if there is no change, return to step 136.

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

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

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

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

[Step 175] Flag Z of E'r'ROM 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 flow of the sequence in which release, film feeding, image charging, and mirror driving are performed simultaneously.

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

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

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

[Step 171] Determine whether or not the communication result with the camera side microcomputer MC2 is an aperture drive command from the camera side. If it is determined that it is an aperture drive command, proceed to step 172; otherwise, proceed to step 173. Branch out.

[Step 172] Third motor M3 for driving aperture blades
is energized in the normal rotation direction (counterclockwise in FIG. 10) to narrow the aperture to a predetermined position. Since the aperture value is sent from the camera during communication, it is only necessary to turn on the power for a period corresponding to the aperture value. Alternatively, a stepping motor or the like may be used as the third motor M3 to output a predetermined number of drive pulses.

[Step 173] Determine whether the communication result with the camera side microcomputer is an aperture open command from the camera side. If it is determined that it is an aperture open command, proceed to step 174; otherwise, return to step 170. , camera side microcomputer M
Waits for the next command from C2.

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

The above is the flowchart of the lens microcomputer MC3.

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

Load a new film cartridge 50 into the camera,
Autoloading starts by closing the back cover 430. That is, first, the second motor M for winding
In this state, both the spool 401 and the sprocket 402 are rotated using the second motor M2 as a driving source, and the film league portion 56 is sent to the spool 401 and wound. Thereafter, the second motor M2 is once reversed, the clutch is switched, the sprocket 402 is freed, and the drive is switched to the spool drive. Then, the second motor M2 is rotated in the normal direction again for about one frame, and it is checked whether the autoloading is successful. In other words, when the sprocket is free,
By rotating the spool 401, the sprocket 4
02'' is rotated by the film 52, it can be confirmed that the leader portion 56 of the film 52 is wound around the spool 401, and it can be determined that the autoloading has been successful. At this point, the film empty feeding operation for autoloading is completed, the rotation of the second winding motor M2 is stopped, and the camera is in a state of waiting 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 number of seconds, the coil 389 of the trailing blade control electromagnet is energized to run the trailing blade group 351 to end the exposure.

After the completion of exposure is confirmed, the first motor M1 is rotated by a predetermined amount again 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 about the same time, the second motor M2 of the winder is rotated in the normal direction by the amount of winding 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.

Then, when the exposure operation based on the above-mentioned release operation is repeated and all the frames of the film have been photographed, the film 52 is stretched when the film 52 is wound, and in this state, the rotating board 420, which rotates in conjunction with the sprocket 402, stops rotating. If detected, the first motor Ml for mirror driving and shutter charging is first rotated in the normal rotation direction until mirror down and shutter charging are completed.

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

The above-described embodiment is characterized in that, first, the first motor Ml for driving the mirror and charging the shutter, and the second motor M2 for winding the film are each provided independently. Therefore, the piece speed can be improved. Especially charging after the shutter runs (winding the film 52 and charging the shutter unit 300)
Regarding the film winding operation, which usually takes the longest time, in the past, a common motor was used to wind the film and charge the shutter, but in this embodiment, the second motor M2 only needs to wind the film. This film winding operation could be completed in an extremely short time.

In addition, in normal cases, the driving of the first motor Ml and the second motor M2 are overlapped to perform the shutter charging operation and film winding operation after the shutter travels.
This also contributes to improving the piece speed.

Further, in performing the superimposed drive of the two motors M1 and M2, in this embodiment, as a safety measure, if a problem occurs with the superimposed drive, the motors are automatically switched to series drive to deal with the problem. In other words, the first motor M1 after shutter running
and the second motor M2 (after step 130 in FIG. 13E), if the shutter charge drive by the first motor Ml is not completed within the set timer time (from step 142 to step 143). In step 1-18, the second motor M2 for winding the film is temporarily stopped because it is determined that the superimposed drive of the motor is not possible due to a drop in battery voltage, etc. (branch).
. Then, after driving only the first motor Ml and controlling the first motor Ml to stop upon completion of shutter charging (steps 136 and 137), the second motor M2 is driven again (step 140). and switched to series drive. Therefore, if the N battery voltage simply decreases or the hoisting load increases at low temperatures, the first and second motors Ml, M
Both operations, ie, shutter charging and film winding, can be completed by simply switching the second superimposed drive to the series drive.

Note that switching from superimposed motor drive to series drive is determined not only by looking at the operating state of the first motor Ml, but also by looking at the operating state of the second motor M2. There is. That is, the change in the signal of the input capacitor P9 (feeding is detected at a level shorter than one frame), which monitors whether the film 52 is actually being fed by the drive of the second motor M2, occurs within the predetermined timer period. (Branch from step 161 to step 167)
In this case, as mentioned above, it can be determined that the weight of the motor becomes unreasonable due to low battery voltage, low temperature, etc., and the second motor M2 itself cannot rotate or is rotating slowly. The second motor M2 is controlled to stop (step 148). Even in this case, after the first motor M] has stopped due to completion of shutter charging, the second motor
motor M2 is re-driven.

Furthermore, a feature of this embodiment is that battery voltage information is effectively utilized when switching the motor drive described above. That is, both motors Ml.

Immediately before driving M2, the battery voltage is checked (step 120), and the subsequent operation is changed depending on whether the battery (BAT) voltage is high or slightly low. Only when it is detected that the battery voltage is slightly low, weight drive is switched to series drive depending on the operating state of the first motor Ml or the second motor M2 (step 144, step 168, step 148). This occurs when either the first motor M1 or the second motor M2 cannot complete its operation within the predetermined time when the battery voltage is low and the hoisting load is large. It would not be surprising if such a problem occurs, and in most cases, the operation can be completed simply by switching the superimposed drive of both motors to series drive. However, even though the voltage of the battery (DAT) is high, the motor Ml.

Accidents often occur when M2 does not operate as specified, so in this state both motors Ml and M2 stop driving (step 144, step 168, step 1).
46. Step 169). As a result, unnecessary operations were prevented.

In this embodiment, the above-mentioned safety measures were taken and the first motor Ml and the second motor M2 were driven in a superimposed manner.
The reduction ratio of both the transmission systems of the mirror box drive mechanism 100 driven by the first motor M1 and the film winding drive mechanism 400 driven by the second motor M2 is reduced without placing too much emphasis on safety. The design was aimed at high-speed operation, and the piece speed was extremely high.

(Effects of the Invention) As explained above, the present invention makes it possible to obtain an extremely high frame speed with a simple configuration, and also enables film winding and charging even when the power supply voltage is low or at low temperatures. A motorized camera can be provided.

[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 shown in 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. Figure 16 is a time chart. 40・・・・・・・・・・・・・・・・・・・・・
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・・・・・・Camera body, 60・・・・・・・・・・・・
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・・・・・・・・・Mirror box, 70・・・・・・
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・・・・・・・・・・・・・・・・・・Movable mirror, Ioo・・・・・・・・・・・・・・・・・・
・・・・・・Mirror box drive mechanism, 200 ・・・
・・・・・・・・・・・・・・・・・・Film rewind drive mechanism, 300・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・Nyak unit, 400・・・・・・・・・・・・・・・
・・・・・・・・・・・・Film winding drive mechanism, M!
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・・・・・・・・・・・・・・・・・・・・・・・・First motor, M2・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
...Second motor, M3...
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・Third motor.

Claims (3)

[Claims] (1) A charging mechanism that charges at least the shutter, a first motor that serves as a drive source for the charging mechanism, a film winding drive mechanism that drives the film in the winding direction, and a drive source for the film winding drive mechanism. a second motor; and a first motor control circuit that drives the first and second motors in a superimposed manner for photographing the next frame after exposure is completed; When it is detected that the motor is not operating in a predetermined manner based on the output information from the operation detection means that detects the operating state of at least one of the first and second motors, stop one side,
An electrically driven camera comprising a second motor control circuit that re-drives one motor after the other motor completes its operation. (2) In claim 1, the operation detecting means causes at least one of the first and second motors to complete its operation within a predetermined time set by the timer means. Electrically driven camera that detects whether or not. (3) In claim 1 or 2,
The operation detection means is an electrically driven camera that detects voltage value information of a power source.