JPH01202731A - Motor-driven camera - Google Patents

Abstract

PURPOSE:To automatize a camera, to reduce cost and to save space by permitting one motor to feed film for ascending and descending a movable mirror for a next frame, to charge a shutter and to release it. CONSTITUTION:When a release switch is turned on, a motor M1 is reversed, and the movable mirror 134 is ascended. Simultaneously, a shutter charge lever 146 is operated to release charging, then the motor M1 is stopped. After the shutter action, the motor M1 is further reversed, and the movable mirror 134 is descended. After the shutter charge lever 146 is operated to charge, the motor M1 is stopped. Instantaneously, the motor M1 is controlled to rotate normally, a planetary gear 106 being a transmission system on the side of the upper output shaft of the motor M1 is rewound owing to revolution, and is meshed with a gear 110, thereby rewinding film. Thus, one motor does almost everything to contribute automation, reduction in cost and space-saving.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a motor-driven camera in which a plurality of mechanisms are driven by one motor.

[Conventional technology]

In recent years, many applications have been filed for cameras that perform photographic preparation operations such as shutter charging and film feeding for each photographed frame based on the output of a single motor. The general structure of this system is based on the rotation of the motor in one direction (i.e., the preparation for shooting is also performed while the film is being fed (winding or rewinding). Due to this relationship, both drive systems are In order to maintain the same phase, a sprocket drive must be used to feed the film, and the film take-up shaft is friction-coupled with the sprocket at a sufficiently increased speed. In this case, autoloading failure cannot be detected, and there is also a problem of energy loss due to slippage of the friction joint during film feeding.

Even in a camera employing the film preliminary winding system, the structure disclosed in Japanese Patent Application Laid-Open No. 57-89732 is as described above.

In order to solve the above-mentioned problem, it is necessary to separate the film advance drive system for each photographed frame and the photographing preparation operation drive system. For example, it is conceivable that the film advance drive system and the shooting preparation drive system are driven by separate motors, and this allows the film advance to be controlled by the winding rotation angle, which changes depending on the change in the film winding diameter. Although it is possible to drive the shaft directly, this is not desirable in terms of cost and space efficiency. Furthermore, as in US Pat. No. 4,350,421, a system has been proposed in which the film winding drive system and the shutter charge drive system are driven by switching between forward and reverse rotation of a single motor, but the structure is complicated and
A problem with large energy loss is occurring.

〔the purpose〕

An object of the present invention is to provide a motor-driven camera that allows a single motor to perform many tasks, thereby achieving automation, cost reduction, and space saving, and further increasing the frame speed as much as possible and reducing energy loss. It is in.

[Features of the invention]

The present invention provides a crack in which the output transmission system is switched by switching the rotational direction of one motor, and basically, rotation in the first direction drives the photographing preparation mechanism, and rotation in the second direction drives the film feeding mechanism. It features a motor-driven camera that has a series sequence of driving.

〔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 the general arrangement of a single-lens reflex camera, and 10 indicates a camera body. This camera body is equipped with a detachable photographic lens 1. 2 is a release button, 3 is a rewind button for forcibly rewinding the entire sternum, and 4 is a battery located at the bottom of the camera body.

It should be noted that the battery 4 is of course constructed so that it can be easily taken out from the battery compartment by removing a member corresponding to the battery cover on the camera body IO so that it can be easily taken out when replacing the battery. is configured. M
1 is a motor, and this motor M1 serves as a driving source for both the film winding system and the film rewinding system, and
Serves as a drive source for driving the charge mirror in the front panel system. 5
6 is a film winding drive mechanism, 6 is a film rewinding drive mechanism,
Reference numeral 7 indicates a mirror box drive mechanism as a front plate system, and reference numeral 8 indicates a film counter mechanism.

FIG. 2 shows a perspective view of each structure.

Next, each structure will be explained in detail based on the above-mentioned FIG. 2 and detailed drawings for each structure.

First, the motor M1 will be described. The motor M1 has two output shafts, an upper and a lower output shaft, and both output shafts are configured to rotate synchronously.

Next, the film winding drive mechanism will be explained.

In the figure, 20 is a first pinion fixed to the output shaft below the motor M1, 22 is a transmission gear that meshes with the first pinion 20, and this transmission gear 22 is connected to a sun gear 26 via a connecting shaft 24. are doing. Reference numerals 26 to 30 constitute a planetary clutch, and a planetary gear 28 that can revolve around the sun gear 26 is meshed with the sun gear 26 by a planetary lever 30 (frictionally connected to the sun gear 26). Reference numeral 32 denotes a transmission gear, which is disposed at a position where it engages and disengages as the planetary gear 28 revolves, and engages with the planetary gear 28 by the revolution movement accompanying the counterclockwise rotation of the sun gear 26, thereby transmitting the motor Ml. The output rotation is transmitted. Also, when the motor M1 rotates in the opposite direction and the sun gear 26 rotates clockwise,
The meshing between the transmission gear 32 and the planetary gear 28 is broken. 34 and 36 are transmission gears for transmitting the rotation of the transmission gear 32, and here the transmission gear 36 has a two-stage gear shape.
meshes with the sun gear 38.

38 to 42 constitute the first planetary clutch;
A first planetary gear 40 that can revolve around the small gear of the two-stage gear-shaped sun gear 38 meshes with a first planetary lever 42 (frictionally connected to the small gear of the sun gear 38).

Further, 38, 44 and 46 constitute a second planetary clutch, and the small gear of the sun gear 38 is a second planetary clutch that can be revolved by a second planetary lever 44 (friction coupling with the small gear of the sun gear 38). The planetary gears 46 are in mesh.

Reference numeral 48 denotes a transmission gear for driving the spool, which is disposed at a position where the first planetary gear 40 engages and disengages as the first planetary gear 40 revolves. It meshes with the gear 40 to transmit the output rotation of the motor Ml.

Note that if the motor M1 rotates in the reverse direction, the transmission will be cut off by the planetary clutch mechanisms 26 to 30 on the upstream side, so in particular, the first planetary lever 42 will not rotate counterclockwise. do not have.

50 is a spool gear for driving the spool, and 52 is a spool for winding the film. This spool gear 50 is always meshed with the transmission gear 48 and is in a fixed relationship with the spool 52 (in FIG. 2, the spool gear 50 and spool 52 are drawn apart for ease of understanding, but Both are actually fixed). The above spool 52
A spool claw 52a that engages with the perforations of the film F is formed on the circumferential surface of the film F.

On the other hand, 54 is a transmission gear for driving a sprocket, and 2
The larger gear is formed into a stepped gear shape, and the larger gear is the second planetary gear 4.
The second planetary gear 46 is disposed at a position where the second planetary gear 46 is engaged and disengaged by the revolution of the sun gear 38, and the second planetary gear 46 is engaged with the second planetary gear 46 by the revolution movement accompanying the clockwise rotation of the sun gear 38, thereby transmitting the output rotation of the motor M1. be exposed.

56 is a sprocket gear for driving a sprocket, and 58 is a driving sprocket. The sprocket gear 56 is always meshed with the small gear of the transmission gear 54, and is in a rotationally interlocking relationship with the drive sprocket 58 (in FIG. 2, the sprocket gear 56 and the drive sprocket 58 are Although the interlocking mechanism is omitted, the two are actually connected by a shaft etc. so that they can rotate in conjunction).

The driving sprocket 58 is formed with teeth 58a that mesh with the perforations of the film F.

Note that the circumferential speed ratio of the spool 52 is set to be larger than that of the drive sprocket 58.

A structure is formed near the tip of the second planetary lever 44 of the second planetary clutch mechanism to disengage the second planetary gear 46 and the transmission gear 54 and to hold them in this state. Regarding this structure, the third section showing the enlarged bottom of the main part
Explanation including diagrams.

That is, there is a notch 4 near the tip of the second planetary lever 44.
4a, a protrusion 44b, and a chevron-shaped click crest 44c are formed. Reference numeral 60 denotes a reset lever supported by the swing itself by the rotation center 60a, and the bent regulating portion 6
0b, a first protrusion 60c, and a second protrusion 60d protruding toward the back cover side.

Reference numeral 62 denotes a holding lever, which is supported concentrically with the rotation center 60a of the reset lever 60, and is supported by the regulating portion 60b.
It can be freely swung at a slight angle regulated by.

This holding lever 62 is attached to the second planetary lever 4.
A pin 62a is formed at a position corresponding to the notch 44a of No. 4, and a click protrusion 62b is formed at a position corresponding to the mountain-shaped click ridge 44c. 64 is a holding spring fixed to the reset lever 60;
2 is elastically pressed to bring the click protrusion 62b into contact with the click crest 44c.

A reset spring 66 elastically presses the reset lever 60 in the counterclockwise direction (in FIG. 3).

Reference numeral 70 denotes a back cover of the camera that is supported by a rotating shaft 70a so as to be able to swing open and close.
by pushing the second protrusion βOd, the reset lever 60 is moved against the reset spring 66 as shown in FIG.
Push and hold in the positions shown in FIGS. 3(a) and 3(b).

Therefore, in the starting state of film winding, the second planetary lever 44 is connected to the second planetary gear 4 as shown in FIG. 3(a).
6 and the transmission gear 54 are in mesh with each other. After a part of the leader of the film is wound around the spool 52 due to film winding, the drive sprocket 58 is now driven by the film F, and the rotational speeds of the second planetary gear 46 and the transmission gear 54 are matched. I won't be able to do it. Therefore, at the beginning of film winding, a force that rotates the second planetary lever 44 clockwise (as viewed from the bottom in FIG. 3) acts as a repulsive force, causing the lever 44 to rotate clockwise. let During this rotation, as shown in FIG. 3(b), the click protrusion 62b moves to
4c, the second planetary gear 46 and the transmission gear 54
The connection between the two is severed. Further, this state is maintained because the holding lever 62 is pushed toward the second planetary lever 44 by the holding spring 64, and the click protrusion 62b presses the position where the click ridge 44c extends from the top to the slope.

In this state (the state shown in FIG. 3(b)), the back cover 70
The spool 52 is held until the next opening, and from then on, only the spool 52 (spool drive) exerts the driving force for winding the film F.

When the back cover 70 is opened as shown in FIG. 3(C), the reset lever 60 is pressed by the reset spring 66 and swings counterclockwise, so the holding lever 62 similarly swings counterclockwise. This time, the pin 62a pushes the protrusion 44b to swing the second planetary lever 44 counterclockwise, returning the second planetary gear 46 to its initial position where it can mesh with the transmission gear 54.

Next, to explain the film counter mechanism and film feed detection mechanism, returning to FIG. 2, 80 is a driven sprocket, which does not work in conjunction with the drive sprocket 58 and rotates only in accordance with the movement of the film F. do. 82 is a transmission gear fixedly connected to the driven sprocket 80. 8
Reference numeral 4 denotes a detection gear that meshes with the transmission gear 82, and is set to rotate once when the film is fed for one frame of film (normally, eight perforations).

A counter feed shaft 86 has notched teeth 86a formed on its upper end, and rotates in conjunction with the detection gear 84.

The interlocking of the two rotations is achieved by the meshing between the internal teeth 84a formed in the center hole of the detection gear 84 (see Fig. 4) and the external teeth 86b formed at the lower end of the counter feed shaft 86 (see Fig. 4). carried out by. However, the meshing between the internal teeth 84a and the external teeth 86b is set to be loose in terms of radial dimension, so that the counter feed shaft 86 can move slightly in the radial direction with respect to the detection gear 84. A counter gear 88 is rotatably supported by a central shaft 88a and is urged to rotate clockwise by a spring (not shown). A toothed portion 88b is formed for rotating the counter feed shaft 86 by one pitch in one rotation, and the toothed portion 88b is formed on the upper surface.
Film frame number display 88 at intervals matching the pitch of 8b
It is marked with c. 90 is a counter reset lever swingably supported by a central shaft 90a, and the protruding bottle 90 is pushed by the pushing part 70c when the back cover 70 is closed.
b, and a pushing portion 90c that pushes the counter feed shaft 86 during counterclockwise rocking. Reference numeral 92 denotes a spring whose center part is supported by a pin 90d formed on the counter reset lever 90. One end of this spring 92 comes into contact with the fixing pin 92a, and the other end comes into contact with the counter feed shaft 86, so that the back When the lid 70 is closed (the state shown in FIG. 2), the counter feed shaft 86 is elastically pressed toward the center of the counter gear 88, and the upper end of the feed shaft 86 (the notched tooth 86a
position) and the tooth portion 88b of the gear 88, thereby ensuring proper feeding of the gear 88 and preventing return to the initial position. On the other hand, when the back cover 7o is opened, the holding of the counter reset lever 90 itself is released, and the reset lever 90 is swung counterclockwise by the biasing force of the spring 92, and the pushing part 90c is moved toward the counter feed shaft. 86 in the opposite direction to the counter gear 88. As a result, the counter gear 88 becomes free to rotate, and is rotated clockwise to the initial position ("E" indicating the number of film frames is located in the display window) by a spring force (not shown).

Note that when the back cover 70 is closed after that, the upper end of the counter feed shaft 86 will be connected to the teeth 88 of the counter gear 88.
b, and rotates the gear 88 into the notched tooth 86.
It is possible to intermittently feed one tooth at a time in the addition direction by a.

Reference numeral 94 denotes a detection board, which is disposed on the lower surface of the detection gear 84. This detection gear 84 and detection board 94 are
It constitutes a mechanism for detecting the feeding amount of film F, and the detailed structure will be explained below with reference to FIGS. 4 and 5.

FIG. 4 shows a view of the detection gear 84 from the back side.
A sliding brush 85 is attached to this back surface. FIG. 5 shows the detection board 94 viewed from the front side, and the sliding area of the sliding brush 85 as the detection gear 84 rotates has a comb tooth pattern 94a and a duty control pattern 94b.

Brake control pattern 94c and ground pattern 94
d is formed. Then, each pattern 94a to 94
d is connected to terminals 95-97. Note that the width area in which the sliding brush 85 actually slides is indicated by the number 98 using a two-dot chain line. Here, since a ground level signal is supplied to the terminal 96 by a circuit described later, the terminal 96
5 makes it possible to detect the movement signal (pulse signal) during frame feeding of the film F, and terminal 97 makes it possible to detect the duty control range near the end of frame feeding of the film. It becomes possible to detect the brake control range at the end of frame feeding of the film F. Specifically, referring to the time chart for film rewinding in FIG. 6, if a ground level signal is supplied to the terminal 96, the sliding brush 85 will be
A pulse-like signal is obtained at the terminal 95 by sliding the comb-tooth pattern 94a and the ground pattern 94d. Since the generation interval of this pulse-like signal is synchronized with the film feeding speed, if the generation interval of this pulse-like signal is shorter than a predetermined time, the film F has been properly fed (both winding and rewinding). On the other hand, if it is longer than the predetermined time, either the battery voltage has decreased or the winding or rewinding of the film F has been completed. It is possible to detect that the state in which the data has been included in the cartridge has been completed.

Next, the sliding brush 85 slides on the duty control pattern 94b and the ground pattern 94d, thereby causing the terminal 9
7, a ground level signal is obtained. This timing is set so that the start end 94b-1 of the duty control pattern 94b is synchronized with the vicinity of the end of one frame of the film F (rewinding one frame), and the motor Ml is decelerated from this point. Deceleration control is performed by switching from full energization to duty pulse energization.

Furthermore, as the sliding brush 85 slides on all of the duty control pattern 94b, brake control pattern 94c, and ground pattern 94d, a ground level signal is obtained at both terminals 95 and 97. This timing is set so that the starting end 94cm1 of the brake control pattern 94c is synchronized with just before the end of rewinding the sternum of the film (taking into account the overrun), and from this point the motor M1 stops rapidly. It is switched to short circuit and stop control is performed.

Next, the film rewind drive mechanism and mirror box drive mechanism will be explained.

Returning to FIG. 2, 100 is a second pinion fixed to the output shaft above the motor Ml, 102 is a second pinion 1
It is a two-stage gear-like transmission gear that meshes with 00. 104～
Reference numeral 108 constitutes a planetary clutch, and a two-stage gear-like sun gear 104 that meshes with the transmission gear 102 includes a two-stage gear-like planetary gear that can be revolved by a planetary lever 108 (frictionally connected to the sun gear 104). 106 are engaged. 110 is a rewinding gear, and a planetary gear 106
The planetary gear 1 rotates in the first direction (clockwise rotation of the sun gear 104 due to the clockwise rotation of the motor M1).
It is located at a position where it meshes with the small gear 06.

Reference numeral 112 denotes a rewinding fork that meshes with a well-known film cartridge shaft, and is connected to the rewinding gear 110 with strong friction.

On the other hand, 120 is a transmission gear in the mirror charge drive transmission system, and the planetary gear 106 rotates in the second direction (counterclockwise rotation of the sun gear 104 due to the counterclockwise rotation of the motor M1). It is located at a position where it meshes with the large gear of.

A transmission shaft 122 has one end fixed to the transmission gear 120, and a worm gear 124 fixed to the other end.

126 meshes with the worm gear 124 and rotates clockwise (
It is a mirror drive gear that rotates when the motor M1 rotates counterclockwise), and a mirror drive cam 128 is integrally formed on the front side, and a position detection brush 130 (described later) is fixed on the back side. There is. Reference numeral 132 denotes a mirror drive lever consisting of two levers, which are connected to the mirror drive cam 128.
It has the role of a cam follower. That is, one end 132a of this mirror drive lever 132 is connected to the ascending cam surface 128a of the mirror drive cam 128 (see FIG. 7).
By slidingly contacting the
The counterclockwise rotating state is maintained by slidingly contacting the flat cam surface 128b (see FIG. 7), and slidingly contacting the downward cam surface 128c (see FIG. 7) (even if it does not actually come into sliding contact). The one end portion 132a and the downward cam surface 128c are in positional correspondence), thereby allowing clockwise rotation (return). The other end 132b of the mirror drive lever 132 drives the mirror by receiving swing control according to the rotational position of each cam surface of the mirror drive cam 128 described above. Reference numeral 134 designates a movable mirror, which reflects the subject light that has passed through the photographic lens to the finder optical system (not shown) at the finder observation position (see FIG. 2).

Two states are available: the mirror down state shown in Figure 7(a)) and the exposure retracted position where the mirror rotates to direct the subject light toward the film (mirror up state shown in Figure 7(b)). It is rotatably supported so that it can be rotated. Reference numeral 136 designates a support frame to which the movable mirror 134 is fixed, and rotation shafts 136a are formed at both ends thereof, and the support frame 136 is rotatably supported within the mirror box by the rotation shafts 136a. 138
is a mirror pin formed on one side of the support frame 136, and this mirror pin 138 and the mirror drive lever 13
2 is in contact with the other end 132b. Note that the support frame 136 is constantly biased by a spring 140 in a counterclockwise direction (mirror-down direction). therefore,
The mirror drive lever 132 is rotationally driven in the counterclockwise direction by having one end 132a in sliding contact with the ascending cam surface 128a of the mirror drive cam 128.
By slidingly contacting the lower cam surface 128b, the counterclockwise rotation state is maintained, and by slidingly contacting the lower cam surface 128c, clockwise rotation (return) is permitted. The other end 132b of the mirror drive lever 132 pushes the mirror pin 138 and raises the movable mirror 134 by being controlled according to the rotational position of each cam surface of the mirror drive cam 128 described above. Operation, the mirror pin 13
8 is continued to maintain the mirror up state, and the mirror pin 138 is released to allow the mirror to be moved down.

142 is a shutter charge gear that meshes with the mirror drive gear 126 and rotates counterclockwise, and a shutter charge cam 144 is integrally formed on the front surface side.

Note that this shutter charge gear 142 performs one-to-one transmission (reduction ratio 1.0) with the mirror drive gear 126. Here, the shutter charge cam 144
is a climbing cam surface 144a for driving a shutter charge lever 146 (described later) counterclockwise (see FIG. 7);
A flat cam surface 144b (see FIG. 7) for maintaining the rotational position (charged state) of the lever 146 and the lever 14
Downward cam surface 144c that allows clockwise rotation of 6
(See FIG. 7) is formed.

Reference numeral 146 denotes a shutter charge lever formed in an oval shape, which is rotatably supported by a central shaft 146a and serves as a cam follower of the shutter charge cam 144. In other words, this shutter charge lever 1
46, a roller 146b supported at one end is rotated in the counterclockwise direction by contacting with the ascending cam surface 144a of the shutter charge cam 144, and is rotated counterclockwise by contacting with the flat cam surface 144b. The roller 14 is maintained in the rotating state, and the roller 14
6b reaches, clockwise rotation is permitted.

The roller 146c supported at the operating end of the shutter charge lever 146 is controlled according to the rotational position of each cam surface of the shutter charge cam 144, so that the lever for charging in the shutter unit is controlled. Push one end to charge the shutter, and continue pushing the lever for charging to maintain the charging operation (at this time, simultaneously move the shutter leading blade group and trailing blade group to the travel preparation position. It is possible to maintain the target.

In addition, the shutter unit itself has already been applied for in 1986-39.
Since the application is filed as No. 629, detailed explanation will be omitted. ), release the pressing of the lever for the charge and return (
The mechanical holding of both the shutter leading blade group and the trailing shutter blade group at the travel preparation position is released, and thereafter, the shutter can be made to travel by controlling the energization of the control electromagnet.

Note that, as can be easily understood by comparing and referring to both FIG. 7(b) and FIG. 7(c), the mirror drive cam 1
The mirror-up drive phase of the mirror drive lever 132 by the shutter charge cam 144 and the charging drive phase of the shutter charge lever 146 by the shutter charge cam 144 are set to be completely shifted from each other. In other words, Fig. 7 (C
), when the shutter charge lever 146 is being charged and driven by the shutter charge cam 144, the mirror drive cam 128 is connected to the mirror drive lever 132.
is not pushed, and the movable mirror 134 is in the mirror down state. Further, as shown in FIG. 7(b), the mirror drive cam 1
When the movable mirror 134 is brought into the mirror-up state by pushing the mirror drive lever 132 at step 28, the shutter charge cam 144 releases the charge from the shutter charge lever 146 and places the shutter leading blade group and trailing blade group in the traveling preparation position. Release the mechanical hold (tension).

Next, a mechanism for electrically detecting the phase of shutter charge and mirror up will be described with reference to FIG. 8.

A signal board 160 (not shown in FIG. 2 because the drawing is complicated) is arranged at a position where the brush 130 can slide on the back side of the mirror drive gear 126.

There are three position detection patterns on this signal board 160, that is, a ground pattern 161. An operation end detection pattern 162 and an overrun detection pattern 163 are formed by vapor deposition or the like. Each of these patterns 161-16
3 and the brush 130 fixed to the back surface of the mirror drive gear 126 is shown in FIG. 8(a).

This will be explained using (b).

Here, the sliding portion 130a of this brush 130 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 in this sliding portion 130a, that is, the contact point is a position 130b on a line slightly inside the tip of the brush.

FIG. 8(a) shows the phase in which the completion of shutter charging is detected, which corresponds to FIG. 7(c) above, and shows the phase when the brush 1 is detected.
30 rotates clockwise as shown by the arrow in response to the clockwise rotation of the mirror drive gear 126, and in the state shown in FIG. 162, and the potential of the connector portion (land portion) 162a of the detection pattern 162 changes to the ground level, thereby detecting completion of shutter charging. To explain this detection in more detail, a ground level signal is supplied to the connector portion (land portion) 161a of the ground pattern 161.
On the other hand, the connector portion 162 of the operation end detection pattern 162
The output of a is supplied to the camera control circuit. When the brush 130 is in a position just before the state shown in FIG. 8(a) (this can be understood by replacing the brush 130 with a position rotated counterclockwise from the position shown in FIG. 8(a)). In this case, the sliding portion 130a of the brush 130 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 126 further rotates clockwise, and at the same time, the brush 130 also rotates clockwise, and when it reaches the position shown in FIG. 8(a), the brush 130 (conductive material)
comes into contact with the operation completion detection pattern 162, and the potential of the operation completion detection pattern 162 changes to the ground level via the brush 130, and the camera control circuit detects the completion state of shutter charging, and the above-mentioned The rotational drive of the motor Ml is controlled to stop.

On the other hand, FIG. 8(b) shows the phase in which mirror-up completion is detected, which corresponds to FIG. 7(b) above. As shown by the arrow, the sliding part 130 is rotated clockwise from the state shown in FIG. 8(a) to the state shown in FIG. 8(b).
a is the ground pattern 161 and the operation end detection pattern 1
62 is switched from contact to non-contact of the detection pattern 162, and the potential of the connector portion (land portion) 162a of the detection pattern 162 changes from the ground level to the initial level (
Completion of mirror up is detected by changing to (normally H level). To explain this detection in more detail, the brush 130 is at a position just before the state shown in FIG. 8(b) (brush 1
30 to a position rotated counterclockwise from the position shown in FIG. The output of the connector portion 162a of the operation end detection pattern 162 is still in contact with both of them, and is still supplying a ground level signal to the camera control circuit. From here, the mirror drive gear 126 further rotates clockwise, and at the same time the brush 13
When the brush 130 is rotated clockwise and reaches the position shown in FIG.
2 changes from the ground level to the initial level, the camera control circuit detects the mirror-up completion state, and controls the rotation of the motor Ml to stop.

Next, the above-mentioned film winding and rewinding and mirror drive/
The switching mechanism of each charging mechanism will be explained with reference to FIGS. 2 and 7. Reference numeral 170 denotes a switching lever, which is shown by a two-dot chain line in the figure (to avoid complicating the figure). This switching lever 170 has a central axis 170a.
It is supported so as to be able to swing around the center, and has a first regulating protrusion 170b formed at its upper end and a second regulating protrusion 170c formed at its lower end. A spring 172 biases the switching lever 170 clockwise. 174 is the switching lever 17
This is a tensioning lever that is swingably supported on the 0, and has a latch claw 174a at one end and a protrusion 174b at the other end. Reference numeral 176 denotes a spring that urges the tension lever 174 to rotate in the counterclockwise direction, and one end of the spring 176 is locked to the switching lever 170 and the other end is locked to the tension lever 174. Note that the latch pawl 174a of this tensioning lever 174 is in the initial state (see FIGS. 2 and 7(a)) when the switching lever 1 is closed.
It is locked by a tensioning protrusion 170d formed on 70, and this locking is continued under the biasing force of a spring 176. On the other hand, the protrusion 174b of the tensioning lever 174 is located within the movement locus of the pushing protrusion 132c formed on the mirror drive lever 132, and is used to drive the mirror up as shown in FIG. 7(b). When the mirror drive lever 132 swings counterclockwise, the protrusion 174b is pushed by the pushing protrusion 132c, and the tension lever 174 swings clockwise to release the tension. In that state, the switching lever 170 is
2, it swings slightly clockwise to the position shown in FIG. 7(b).

Reference numeral 178 designates a swingably supported reset lever (see FIGS. 2 and 9), which has a protrusion 178a at one end and a push protrusion 178b at the other end. This reset lever 178 is urged to swing clockwise by a strong spring 180. Note that this strong spring 180 is set to have a stronger spring force than the spring 172 for swinging and biasing the switching lever 170. Therefore, when the back cover 70 is closed, the protruding part 178a of the reset lever 178 is pushed by the pushing protruding part 70d and held in the state shown in FIGS. 2 and 9(a), and the switching lever 170 is rotated clockwise. oscillation is allowed.

However, when the push is released by opening the back cover 70, the reset lever 178 swings counterclockwise, and the switching lever 170, which is already swinging clockwise due to the spring 172, is rotated by the spring 172. It is swung counterclockwise against the resistance to return to the initial state shown in FIG. In addition,
When the switching lever 170 returns to its initial state, the tensioning lever 174 is moved by the pin 17 formed on the lever 174.
4c is guided by a guide protrusion 170e having a cam surface formed on the back side of the switching lever 170.
The latch claw 174a is guided to be locked with the tensioning protrusion 170d. After this, even if the back N70 is closed and the reset lever 178 is swung again, the switching lever 170 is held at the initial position.

Regarding the role of this switching lever 170, see FIGS. 9 and 10.
Explanation including diagrams.

When the switching lever 170 is in the initial position shown in FIGS. 2 and 7(a), the first regulating protrusion 170b at the upper end
enters between the planetary gear 106 and the rewinding gear 110 (see FIG. 9(a)), and the second regulating portion 170 at the lower end
c is spaced apart from between the planetary gear 28 and the transmission gear 32 (see FIG. 1O(a)). Therefore, in this state, the clockwise rotation of the motor M1 allows the planetary gear 28 to revolve in the direction in which it meshes with the transmission gear 32 and winds up the film.
The first regulating section 170b prohibits the revolution in the direction in which the planetary gear 106 meshes with the first regulating section 170b (the central axis 106a of the planetary gear 106 contacts the first regulating section 170b during the revolution), thereby inhibiting film rewinding. However, when the motor M1 rotates counterclockwise, it is not affected by the first regulating portion 170b.
The planetary gear 106 can revolve in a direction in which it meshes with the transmission gear 120, thereby performing mirror drive and charge drive.

On the other hand, when the switching lever 170 swings clockwise as shown in FIGS.
0 (see Figures 9(b) and (C)),
Further, the second restricting portion 170C at the lower end enters between the planetary gear 28 and the transmission gear 32 (FIG. 10(b)).

(See (C)). Therefore, in this state, the clockwise rotation of the motor M1 causes the planetary gear 106 to shift to the rewind gear 1.
The planetary gear 28 is allowed to revolve in the direction in which it meshes with the transmission gear 32, and film rewinding is performed. Film winding is prohibited by contacting the second regulating portion 170C during revolution. Note that even in this state, the planetary gear 106 and the transmission gear 120 can be engaged with each other by revolution due to the counterclockwise rotation of the motor M1.

Next, the camera control circuit will be explained with reference to FIG.

In the figure, CPU is a microcomputer and BAT is a battery. SWI is a power switch that is turned on by pressing the first stroke of the release button 2 (see Figure 1), and when this power switch SW1 is turned on, the diode DS is turned on.
Transistor TRBAT is connected to O via W+ and resistor R2.
NL, power supply to each circuit is started. Further, the output of the power switch SWI is supplied to the input port SWI of the microcomputer CPU. One-shot circuit O accompanying the ON (opening) of the back cover switch 5W8P, which will be described later.
Diode D is also activated by the constant time operation of 8. The transistor TRBAa is turned on via the resistor R2 and the resistor R2. The transistor TRBAA is turned on when the back cover is closed. When the camera is loaded with film and the back cover 70 is closed, the so-called pre-winding method is used to load the film and wind the film evenly in advance. A microcomputer CPU1. The purpose is to supply mt power. Note that the transistor TRBAT is kept in the ON state via the inverter 11 and the resistor R2 when the microcomputer CPU is turned on.

In the figure, REG is a regulator, which is connected to the collector output of the transistor TRBAA and supplies a stable constant voltage Vcc to each circuit (in the figure, the constant voltage Vcc is the input port V of the microcomputer CPU).
cc and is supplied to the analog circuit MET that performs photometric calculations). MET is an analog circuit that performs photometric calculations,
Subject brightness information (Bv) obtained by photometric sensor SPC
and resistance RA corresponding to the preset aperture value information (Av).
By-Av calculation is performed on Y, and the information is input as an output BV1out to an input port ADIN+ as an AD conversion input of the microcomputer CPU.

RISO is a resistor corresponding to the film sensitivity information Sv, and is connected to the input port ADIN2 of the microcomputer CPU.
I am entering information into. Note that VBA□ is the battery voltage of the battery BAT, and the input port ADIN3 of the microcomputer CPU and the transistor bridge circuit MD described later.
is supplied to.

5WPT1N is a film loading detection switch, which is made up of a leaf spring disposed in the cartridge chamber of a camera, for example, and when a film cartridge is loaded into the cartridge chamber, the leaf spring is pressed and the switch turns ON, thereby detecting film loading. The output of this switch is connected to the input port PT of the microcomputer CPU,
It is supplied to N.

5WBP is a back cover switch, which is turned on when the back cover 70 (see FIG. 2) is closed and turned off when it is opened, and supplies an output to the input port BP of the microcomputer CPU and the one-shot circuit O8.

S W CMSP means a switch associated with the sliding of the brush 130 on the signal board 160 (see FIG. 8) and the operation end detection pattern 162, and the moment the output changes from L to H is the mirror up ( shutter charge release)
This is the phase, and the point at which it changes from H to L is the mirror down (
(shutter charge) phase, the output of which is supplied to the input port CMSP of the microcomputer CPU.

S W FLSP and S W FLDY are detection gears 84
(See Fig. 2 and Fig. 4) means a switch that detects the rotation of the
4 (see Figure 5) and the corresponding switch output are connected to the input port FLS of the microcomputer CPU.
Also, the switch SW FLDY is connected to the terminal 97.
The switch output corresponding to the output of is supplied to the input port FLDY.

SW2 is O when the second stroke of release button 2 is pressed.
This is a release switch that outputs the output from the input port SW2.

The LED is a warning light emitting diode, which is disposed near the field of view of the finder or on the exterior of the camera, and is connected to the output port LED of the microcomputer CPU via a resistor RBC.

MD is a well-known transistor bridge circuit, which controls the motor Ml (see Fig. 2) according to instructions from the microcomputer CPU, and output ports PMO, P
Connected to MI.

MCI is a magnet for the shutter leading blade group, and is configured to start the shutter leading blade group when energized. Specifically, by setting the output port PSO of the microcomputer CPU to H, the MCI is magnetized via the resistor RMGI. Then, the transistor TRMGI is turned on to energize the magnet MCI.

Further, MG2 is a magnet for the shutter rear blade group, and is configured to start the movement of the shutter rear blade group when energized.Specifically, by setting the output capo Psi to H, the magnet is connected to the magnet through the resistor RMG2. Transistor T RM
By turning on G2, magnet MG2 is energized.

DATE is a known date imprinting device that imprints data such as the date and day of the week onto the film surface from the back cover 70 side, and this imprinting operation is performed by the microcomputer C.
This is done when the output port DTON of the PU becomes H.

Note that in the figure, GND means ground'.

Next, the operation of the camera control circuit will be explained based on the flowcharts of FIGS. 12 and 13.

(Preliminary winding) [Step 1] When the microcomputer CPU receives power supply, the program is executed from the first address 5TART.

[Step 2] The output port VON is set to H (VoN=1), and the transistor TRBAT is kept on to perform power holding control.

[Step 3] Determine whether or not film is loaded in the camera based on the output of the film loading detection switch SW P T I N. If film is loaded, proceed to step 4; if not, proceed to step 5. move on.

[Step 4] Check whether the back cover 70 is closed using the back cover switch 5WB.
Judging by the output of P, if it is closed, go to step 7; if it is open, go to step 50 RELE
Proceed to ASA routine.

[Step 5] As in step 4, the back cover switch 5WBP is detected, and if the back cover 70 is closed, the process proceeds to step 6, and if it is open, the process proceeds to the RELEASA routine of step 50.

[Step 6] The microcomputer CPU has a built-in EEPROM (non-volatile memory), and one bit in the EEPROM is used as an RFP flag, and this flag is set to 1. This will be explained in detail in the sequence below, but
This RFP flag is used as a determination flag for determining whether or not to perform preliminary winding when the back cover 70 is closed.

Note that after setting the RFP flag to 1, the process advances to step 50, the RELEASE routine.

[Step 7 If the EFP flag mentioned above is set to 1 (EFP=
1) Go to step 8, and if the initial state (EFP=O), go to step 50, the RELEASE routine.

[Step 8] Check the voltage VBAT of the battery BAT based on the analog input of the input port ADIN3 (AD conversion input). The voltage VBAT is AD converted by the AD converter in the microcomputer CPU, and if it is below a predetermined voltage, the camera may malfunction, so proceed to step 9, and if it exceeds the predetermined voltage, there is a problem with the performance. If not, proceed to step 10.

[Step 9] Set the output port LED to H and turn on the warning light emitting diode LE.
D is lit to indicate that the battery voltage VBA has dropped and the camera cannot be operated. Note that this command also includes a function of setting the output port LED to L again after a certain period of time and automatically turning off the light emitting diode LED. Then, the process advances to step 47, the 5TOP routine.

[Step 47] This routine must be passed at the end of every sequence.

Set output port vON to L (V ON = O) 1. :
, thereby turning off the transistor TRBAT, and also disabling the regulator REG and turning off the circuit power supply.
Make it FF.

Also, wait for the time. Usually microcomputer C
While the PU is waiting for this time, the power supply Vcc is turned off.
be done.

Note that the power supply Vcc may still be present even after this waiting time has ended. This occurs when the transistor TRBAT is turned on due to a factor other than the output of the output port VON, specifically when the one-shot circuit O8 is operating due to the power switch SWI being turned on or the back cover switch 5WBP being turned on. be. In such a state, the process returns to step 1 as the start address and executes a new sequence.

[Step 10] When the film is loaded, the back cover is closed, the EFP flag is 1, and the battery voltage VBA is at a level that does not cause any operational problems, pre-wind the film.

That is, the drive sprocket 58 and the spool 52 are driven by rotating the motor M1 in the normal direction (clockwise rotation in FIG. 2), and a part of the leader of the film is first loaded onto the spool 52, and then the film is wound for all frames. Preliminary winding control is performed.

Here, the motor M1 is controlled by the microcomputer CPU.
The operation is controlled as shown in the table below.

Also, the timer TMR is initially reset (TMR=O).

This timer TMR is used to detect when the film cannot be loaded accurately or when the film is in a tensioned state after preliminary winding of all frames has been completed. If the film does not move and the film has not moved by a predetermined amount within the time set by the timer TMR, both of the above conditions can be determined.

Also, a register VR for checking battery voltage, which will be described later.

Initialize VN'R -t='7 (VR=O, VNR=O
)do.

Further, the register E C0UNT of the EEPROM (non-volatile memory) in the microcomputer CPU is initialized (E C0UNT = 0). Note that the register E C0UNT is used as an electrical film counter.

[Step 11] Check the status of the back cover switch 5WBP to determine whether the back cover 70 has been opened during the preliminary winding. If the back cover is opened, the process proceeds to step 12; if the back cover remains closed, the process proceeds to step 13.

[Step 12] If the back cover 70 is opened during the preliminary winding, the motor M1 is stopped, the preliminary winding is stopped, and the process returns to step 4.
Proceed to step 7, 5TOP routine. Note that when the back cover 70 is closed again, the RFP flag is not reset and is still set to 1, so the program proceeds from 5TART in step 1 and executes the preliminary winding operation in step 10 again. However, since the register ECOINT is reset to 0, it is possible to automatically prohibit photographing in the film area of the preliminary winding section that has been performed up to the present time during the RELEASA routine of step 50, which will be described later.

[Step 13] Check whether the film is moving due to preliminary winding.
Check the status of the input port FLSP of the microcomputer CPU. If there is a change in the signal supplied to the input port FLSP, the process proceeds to step 14; if there is no change, the process proceeds to step 22.

[Step 14] Since the film is moving due to a change in the supply signal to the input capo-1-FLSP, initial reset of the timer TMR for detecting film stoppage is performed (TMR-0).
.

[Step 15] The analog voltage at the input port ADIN3 for detecting battery voltage is converted into a digital value by the AD converter in the microcomputer CPU, and the value ADIN3 is set in the register V.
Add the contents of R and store it in register VR again (V
R=VR+AD, N3). Resist vR is step IO
Since the voltage value is initially reset by , the voltage value is added each time the supply signal of the input port FLSP changes in step 13, and as a result, it is stored in the register VR again.

Also, increment the contents of register VNR by l (
l N CVNR). Note that, as will be described later, the number of times the voltage value is added to the register VR is represented in the register VNR.

[Step 16] Check the status of input port FLDY. Capo) FLDY
When an H level signal is being supplied to the input port FLDY, that is, when the brush 85 is not in the brake control section or duty control section, the process returns to step 11. On the other hand, when an L level signal is being supplied to the input port FLDY, that is, when the brush 85 is not in the brake control section or the duty control section, If it is a control section or a duty control section, the process advances to step 17.

In the time chart shown in FIG. 6, the time direction is from right to left during the preliminary winding operation.

[Step 17] Check whether the signal supplied to input port FLSP is H.
When it is at level, the process goes to step 18, and when it is at L level, it goes to step 19.

Now, to explain based on the time chart of FIG. 6, in the preliminary winding operation, the signal changes from the right side to the left side with time, and if the operating state reaches the right side of the brake control section, step 13. The flow will proceed as follows: 14°15.16.19.

[Step 18] When the brush 85 enters the duty control period from the brake control period, the signal supplied to the input port FLSP changes from L level to H level, and in this state, register E COUNT as an electrical film counter is set to 1. Increment and then return to step 11. This means that when the brush 85 moves from the brake control section to the duty control section during the preliminary winding operation, the register E C0INT
is incremented by 1, and the number of film frames is counted independently of the mechanical counter (counter gear 88).

[Step 19 co-calculate the average value of the voltage in step 15 (V=VR÷V
NR).

This is when the brush 85 enters the brake control area.
By averaging the power supply voltage obtained by calculating (VR = VR + AD, N3) every time the signal supplied to the FLSP changes (VR = VR + AD, N3), if the battery voltage VBAT becomes unusable, The drive of motor M1 is stopped in step.

Note that the purpose of the averaging in step 19 is to cancel power supply noise during driving of the motor M1.

[Step 20] Check whether the voltage V obtained in step 19 is higher than the predetermined value M. If the voltage V is higher than the predetermined value M and there is no problem with camera operation, the process returns to step 11. On the other hand, if the voltage is less than the predetermined value M and it is determined that the battery BAT cannot be used, the process returns to step 21. Proceed to.

It should be noted that at the beginning of preliminary winding, the influence of power supply noise becomes large, but if the register VNR is not equal to or higher than a predetermined time, the process is automatically returned to step 11, so no problem occurs.

[Step 21] Stop the motor M to cancel the preliminary winding operation, turn on the warning light emitting diode LED, and then proceed to the 5TOP routine. In this case, when the power is turned on again or when the battery BAT is replaced with a new one, the contents of the EEFROM remain stored, so the preliminary winding operation is performed again.

[Step 22] If there is no change in the signal supplied to the input port FLSP in step 13, check the state of timer TMR, and if the predetermined value K has not yet been reached, return to step 11. ．． 13.Repeat the routine of 22, while
If there is no change in the supply signal even after counting the predetermined value K, the process proceeds to step 23.

[Step 23] Using "3" as the discrimination value, if the value of the register E cotmr as an electrical film counter is greater than 3, it is determined to be normal and the process proceeds to step 24; if it is less than 3, the film is transferred to the spool 52. Step 1 as loading failure
Proceed to step 2 to stop motor M1.

When the film is loaded onto the spool 52 by the preliminary winding operation, the entire sternum of the film can be wound, and in this state the film is stretched, and in step 22 the routine branches to step 23.

However, even if the film is loaded incorrectly and the film cannot be loaded onto the spool 52 at the beginning of preliminary winding, the film will not move, so the process branches from step 22 to step 23 in the same way as in the case of tension described above. You will proceed through the routine. Step 23 is a step aimed at determining under what conditions the film does not move. That is, register E C
If 0UNT is larger than 3, it is determined that the film cannot move due to tension (normal), and the corresponding register E
If C0UNT is 3 or less, the film spool 52
The film cannot be loaded and the film does not move (
abnormal).

Please note that step 12 may not be possible due to loading.
When the motor M1 stops after proceeding to step 1, the photographer can determine the abnormal condition using the mechanical film counter (counter gear 88) and can load the film again.

[Step 24] Reset the RFP flag used as a judgment flag for determining whether to execute preliminary winding (RF
P=O). Therefore, in the next sequence step 7
The process branches to step 50 and does not proceed to the preliminary winding routine described above.

[Step 25] Since the preliminary winding has been performed normally, the motor Ml is stopped and the preliminary winding operation is completed.

[Step 26] Counter gear 88 as a mechanical film counter
and resistor E C0 as an electrical film counter
UNT adjusts the phases of the brake control section and duty control section of the brush 85 so that they are added or subtracted at a switching point.

Let us now consider the point at which the preliminary winding operation ends (the state in which the brush 85 has slightly transitioned from the brake control section to the duty control section at the film tensioning stage).In this case, the mechanical and electrical counters Each is added by 1 at the above switching repoint.

However, when the drive (energization) of the motor M1 is stopped, the film may return slightly to the cartridge side due to tension, causing the driven sprocket 80 to rotate slightly in the rewinding direction. At this time, when the position of the brush 85 returns to the brake control zone, the counter gear 88 as a mechanical counter is intermittently fed (subtracted by 1) in the sternum rewinding direction, but the register E C0UN as an electrical counter
T will be overlooked, resulting in a one-count error between the two. As a result, if the film is subsequently taken while being rewound, it ends up taking pictures even of frames that should not have been able to be taken, that is, the exposed portions during preliminary winding.

Therefore, steps 26 to 30 change the value of register E COUNT to counter gear 8 at the end of preliminary winding.
This routine aims to solve the above-mentioned problem before it happens by adjusting to the number 8.

In step 26, the signal supplied to the input capo FLDY is determined, and if it is L, the process goes to step 27, and if it is H, the process goes to step 31.

[Step 27] Determine the signal supplied to the input port FLSP, and if it is H, proceed to step 28; if it is L, proceed to step 31.

[Step 28] Waiting for time. Sufficient time is set for the film to return toward the cartridge due to film tension.

[Step 29] After waiting the time in step 28, enter the card again)
Check the status of the supply signal to FLSP. Here, if the supply signal to the input port FLSP remains H and there is no change, the process proceeds to step 31, where it changes to L and causes the above-mentioned phenomenon (the mechanical counter rotates in the rewinding direction by one frame due to film tension). If it is determined that the current state has occurred, the process proceeds to step 30.

[Step 30] Register E C0U as electrical film counter
The value of NT is decremented, ie, subtracted by 1, to match the mechanical and electrical film counters.

[Step 31 Reverse the commuter M1. As the motor Ml reverses (rotates counterclockwise in FIG. 2), the planetary gear 1
06 is engaged with the transmission gear 120 of the mirror drive/charge drive system, the mirror drive gear 126 and the shutter charge gear 142 are rotated, the initial position retention by the tension lever 170 is released, and the switching lever 170 is swung ( (Transition to FIG. 7(c)).

Thereby, when the motor Ml rotates normally again thereafter, the output will be transmitted only to the film rewind system.

[Step 32] Check the state of the supply signal to the input port CMSP, and when it changes from the initial state of L level to H level, proceed to Step 3.
Proceed to step 3.

[Step 33] As the motor Ml continues to rotate in reverse, the process proceeds to step 34 when the signal supplied to the input port CMSP changes to the L level again.

[Step 34: Stop the commuter Ml once. Steps 32 and 33 are steps for detecting the end of empty charging due to the reverse rotation of the motor M1, and the phase at which the signal supplied to the input port CMSP switches from L level to H level is the mirror up shutter. The phase that represents charge release and is switched from the H level to the L level represents mirror-down shutter charging. Therefore, when the process reaches step 34 after passing through steps 32 and 33, one empty charge has been performed.

Next, the motor Ml is rotated normally again. However, at this time, due to the swinging of the switching lever 170, the output of the motor Ml is transmitted to the film rewinding system. That is, the planetary gear 106
meshes with the rewind gear 110, and the chain rewind gear 110 is driven by the motor Ml.

[Step 35] Initial reset the contents of register P C0UNT (
P C0UNT=0).

[Step 36] In order to see where the brush 85 is at the initial stage of film rewinding, the state of the supply signal to the input port FLSP is determined, and if it is in the brake control section, then the process goes to step 40; If it is in the section (for example, duty control section), the result is H and the process proceeds to step 37.

[Step 37] The position of the brush 85 is also determined based on the supply signal to the input port FLDY, and when the signal is H (the brush 85 is in a state other than the brake and duty control section), step 40 is performed.
When L is reached (it is determined that the brush 85 is in the duty control section together with the determination in step 36), the program advances to step 38.

[Step 38] Since it is determined that the brush 85 is located in the duty control section at the beginning of film rewinding, the value of the register E C0UNT as an electric film counter is decremented by 1.

In the time chart of FIG. 6, time progresses from the left side to the right side during the film rewinding operation.

[Step 39 The supply signal to the input port FLDY becomes H (the brush 85 is located outside the duty and brake control section)
Wait until then and proceed to step 40.

[Step 40] Check the state of the input port FLSP, and if there is a change in the supply signal, proceed to step 41; if not, proceed to step 42.

[Step 41] The value of the initially reset register P_COUNT is incremented by 1, and the process returns to step 40 again.

[Step 42] Check the state of input capo-1-FLDY. If the supply signal is H, return to step 40; if it is L, go to step 43.
Proceed to.

In steps 40 to 42, the purpose is to store the number of signals (round tooth pattern 94a shown in FIG. 5) supplied to the input port FLSP while the input port FLDY is H in the register P C0UNT. There is.

[Step 43] The value of the register P COUNT is compared with a predetermined value M. If the value is smaller than the predetermined value M, the process returns to step 35, and if the value is greater than or equal to the predetermined value M, the process proceeds to step 44.

In the routine of this embodiment, at the end of the preliminary winding operation, the rotational position of the exposed frame of the film and the driven sprocket 80 (
In other words, for phase alignment with the rotational position of the brush 85,
The film is rewound in advance. However, if the amount of rewinding is small, there is a possibility that exposure (photographing) frames will be exposed when the film is cut from the film during film development processing.

This step 43 is intended to rewind the film just enough to ensure that no problems occur. In other words, the amount by which the brush 85 actually slides with the brush 85 from the initial state of film rewinding to the duty control section (
The determination is made by replacing the number of tooth-shaped patterns 94a (Fig. 5), and if the number is smaller than the predetermined amount M, the amount of rewinding is too small, and the sternum is rewinded before starting the actual imaging. It is set to .

[Step 44] In order to keep the overrun constant from the start of brake control until the motor M1 actually stops, duty control is applied to the motor M1 before the brake section.

Note that since the motor duty control itself is well known, a detailed explanation will be omitted, but instead of fully energizing the motor M1, the motor M1 is energized in an alternating pulse form to lower the effective voltage to apply braking.

[Step 45] While the brush 85 is moving within the duty control section, the duty control of the motor M1 is performed, and when the input port FLSP enters the brake control section, the L supply signal is sent to the input port FLSP.
When it is determined based on the change to , the process advances to step 46.

[Step 46: Brake control of commuter Ml. And register E
Decrement (subtract 1) the value of couptr by 1.

With the routine up to this point, all preparations for photographing are completed, and the process advances to the 5TOP routine.

(Photographing) [Step 50] The RELEASE routine is executed except for the preliminary winding control.

[Step 51] B V 1 out as the output of the photometric calculation circuit MET
A digital value ADIN+ obtained by AD-converting the analog signal from the microcomputer CPU is stored in the register Bv1 (BVI = ADI N l ). The value BV-AV in terms of apex value is stored in register BVI.

Also, the film sensitivity is the same (AD converted digital value AD
Store IN2 in register Sv (SV=ADIN2
). The value of Sv at the apex value is stored in register SV.

Also, based on the store information of the register BVI and register Sv, the shirt time is obtained (TV = BVI + S
V), store in register TV. In addition, register TV
The content of is the TV of the apex value.

C Step 52] The state of the release switch SW2, which is turned ON by pressing the second stroke of the release button 2, is determined, and only when it is ONt, the process proceeds to Step 53.

[Step 53] Similarly to step 8, voltage V8A of battery BAT.

If the voltage is below a predetermined voltage, the process proceeds to step 54; if the voltage exceeds the predetermined voltage, the process proceeds to step 55.

[Step 54] Similarly to Step 9, set the output port LED to H, light up the warning light emitting diode LED, and set the battery voltage VBA.
Displays that T has decreased and the camera cannot be operated.

[Step 55] The motor Ml is reversed to raise the mirror and release the shutter charge.

[Step 56] The motor M1 is reversed until an H supply signal is obtained at the input boat CMSP, and the process proceeds to the next step 57. As a result, the mirror drive gear 126 and the shutter charge gear 142 are driven, the movable mirror 134 is raised (exposure retracted state), and the shutter is released from charge and becomes ready for shutter operation.

[Step 57 Brake control is performed to stop motor Ml.

[Step 58 Co-Convert the apex value TV obtained in step 51 to the actual value,
Convert ivy to seconds (real time expansion).

[Step 59] Set the output port DTON to H and use the date imprinting device DAT.
Start data imprinting on the film surface by E.

Since the date imprinting device itself is well known, detailed illustrations are omitted, but for example, by arranging a plurality of font-shaped LCD segments and selecting them facing the film surface on the back cover side, numerical or textual information such as date 9 hours can be printed. , and is configured to expose the film surface to light.

Start the timer DTMR for photographing time. The contents of this timer DTMR are values that depend on the contents of register sv in which the film sensitivity is stored. However, since the value sv as the contents of the register sv is an apex value, the value α×2j−sv converted to real time (α and β are constants)
is the content of timer DTMR.

Also, here, timer interference of timer DTMR is permitted (ENI). After this, when the timer time of timer DTMH expires, interwoven is started independently of the main routine program, and in the interwoven routine, DTON=O output port DTON is switched to L and DTMR is activated.
-8TOP Stop timer DTMR RTN
Imprinting ends by executing Return to the main routine.

[Step 60] The output port PSo is set to H, and the magnet MCI for starting the shutter leading blade group is energized.

As a result, the shutter leading blade group moves and exposure of the film is started.

Also, the actual time in seconds determined in step 58 is actually counted. This time becomes the exposure time.

Then, when the real-time counting is finished, the output (PSI)
is set to H, the magnet MG2 for starting the trailing shutter blade group is energized, thereby causing the trailing shutter blade group to travel and stop exposing the film.

[Step 61 Wait for the time required for the shutter blade group to travel.

[Step 62] Both output ports PSO and Psi are set to L, and power supply to both magnets MCI and MG2 is stopped.

[Step 63] Motor M is activated to lower the mirror and charge the shutter.
Reverse 1.

[Step 64 Input Capo] The motor Ml is reversed until an L supply signal is obtained at CMSP, and the process proceeds to the next step 65. In addition,
As a result, the mirror drive gear 126 and the shutter charge gear 142 are driven again, the movable mirror 134 is moved down (finder observation state), and the shutter is charged.

[Step 65 Brake control is performed to stop motor M1.

Also, even if the output port DTON is H again (the timer time of timer DTMR has not yet expired), it is forcibly switched to L and data imprinting is completed (DTON
=O). This is because if the film sensitivity becomes extremely low, there is a possibility that the image will not be completed within the charging time.

However, once charging is complete, the next step is to rewind the film in order to take the next frame, so if you continue to capture images, the numbers and letters that will be captured will be washed out. In this step 65, if the imprinting is still continuing even after charging is completed, the imprinting is forcibly ended to prevent the above-mentioned flow of imprinted numbers and letters. It also disables interwoven and prohibits subsequent interwoven (DISI).

[Step 66] The state of the film loading detection switch 5WPTIN is determined based on the signal supplied to the input port PTIN. If the film is not loaded at H level, the process goes to step 67; if the film is loaded, the process goes to step 68. .

[Step 67 After waiting the standard time required to rewind one frame of film, proceed to the 5TOP routine. The purpose of this is to prevent the film from actually rewinding when the film is not loaded, so that when the user performs continuous shooting at a camera store,
This is to prevent the frame speed from becoming too fast compared to the actual shooting time when the film is loaded, and from giving incorrect specifications to the user.

[Step 68] The motor M1 is rotated in the normal direction to rewind the film in order to photograph the next frame.

[Step 69] Wait until the supply signal to the input port FLDY becomes H, and then proceed to step 70. That is, since the brush 85 is in the phase of the brake control section when the motor starts rotating normally, first wait until it leaves that phase.

[Step 70] Wait until the supply signal to the input port FLDY becomes L, and then proceed to step 71. That is, it waits until the brush 85 enters the duty control section.

[Step 71] Duty control of motor M1 is performed.

[Step 72] Wait until the supply signal to the input port FLSP becomes L, and then proceed to step 73. That is, it waits until the brush 85 enters the brake control section.

[Step 73 Since the cobrush 85 has entered the brake control section, the register E COUNT as an electric film counter is set to 1.
Subtract (DE CE C0UNT) [Step 74] If the value of the register E COUNT after subtraction is other than "2", the process proceeds to step 75, and if the value is "2", the process proceeds to step 76. That is, if the register E C0UNT is "2", the process proceeds to a different routine to control the end of photographing. Here, register E C0UN
When T is 2, the counter gear 88 as a mechanical film counter shows "0" (the number "0" on the film frame number display 88c is displayed from the display window 89 provided on the camera body).
” corresponds to the state). Note that the display 88c of the counter gear 88 shows that the mark rEJ is displayed in the display window 8 at the start of preliminary winding.
9, and the film area that can be photographed is three frames ahead of this mark "E".

Register E C0UNT is “0” when the mark “E” is above.
”, the film area (frame) that can be photographed is up to E C0UNT:3.

[Step 75] Since the register E COUNT is not "2", it can be determined that there are still frames on the film that can be photographed, so the motor Ml is braked to stop the film rewinding. Thereafter, the process advances to the 5TOP routine and waits for the next frame to be photographed.

During normal shooting, this routine determines the end of shooting.

[Step 76] Since the register E COUNT is "2", it means that all the frames that can be photographed have been photographed, so the motor M is continued to rotate in the normal direction in order to control the winding of the film onto the film cartridge.

[Step 77: Initial reset the timer TMR for film stop detection (TMR=0).

[Step 78. 79 Step 13 above. Similarly to step 22, when the film stops moving, the process proceeds to the next step 80.

Note that the fact that the film no longer moves in steps 78 and 79 means that the film is wound into the film cartridge.

[Step 80: Apply brake to commuter M1 to stop film rewinding operation.

[Step 81] The motor M1 is reversed to perform empty charging.

[Step 82. 83] Step 32 above. Similar to 33, mirror drive gear 1
The motor M1 is continuously reversed until the shutter charge gear 142 and the shutter charge gear 142 rotate once. This empty charge releases the planetary gear 106 meshing with the rewinding gear 110 by the film rewinding operation, and the subsequent switching lever 17
The main purpose is to enable swinging to the initial position of 0.

[Step 84] Apply a brake to the motor M1 to end the empty charging operation. Then, the flag RFP, which is a judgment flag for determining whether or not to perform preliminary winding, is set to 1 (RFP=1), and preparations are made for preliminary winding control when loading the next film.

Also, register E C as an electric film counter.
Initial reset 0UNT (E C0UNT =
O).

Then, the process advances to step 47, the 5TOP routine, and the control ends.

Next, camera operation will be explained, focusing on the movement of the mechanical mechanism.

(Preliminary winding operation) The present embodiment employs a preliminary winding method in which the film is wound for all frames before photographing, and the film is rewound one frame at a time each time a photograph is taken.

When it is determined that the film cartridge is loaded and the back cover 70 is closed by turning on the back cover switch SW3, the microcomputer CPU causes the motor M1 to rotate clockwise (hereinafter referred to as normal rotation).

As the motor M1 rotates forward, the planetary gear 28, which is the transmission system on the lower output shaft side, rotates and meshes with the transmission gear 32 (see FIG. 10(a)), which clocks the sun gear 38 via the transmission gears 34 and 36. direction.

As the sun gear 38 rotates, the first planetary gear 40 first revolves and meshes with the transmission gear 48 for driving the spool, and the second planetary gear 46 revolves and meshes with the transmission gear 54 for driving the sprocket. 3(a)), both the spool 52 and the drive sprocket 58 are rotated in the film winding direction. As a result, the leader portion of the film F is initially sent toward the spool 52 by the drive sprocket 58, and is wound onto the spool 52 as the perforations engage with the spool claws 52a.

Note that the planetary gear 106, which is the transmission system on the upper output shaft side of the motor Ml, tries to move in the direction of meshing with the rewinding gear 110 due to revolution, but in this state, the switching lever 170
It merely rotates idly because it is blocked by the first regulating protrusion 170b (see FIG. 9(a)).

When a portion of the leader of the film F is wound onto the spool 52, since the peripheral speed ratio of the transmission system on the spool side and the transmission system on the drive sprocket side is different,
6 (rotated by the drive of the motor Ml) and the transmission gear 54 (rotated by the drive sprocket 58 driven by the movement of the film) do not match in rotational speed, and the second planetary lever 44 jumps clockwise (in FIG. 3). Bouncing. Then, the second planetary lever 44 is held in a state in which the click crest 44C overcomes the click protrusion 62b of the holding lever 62 due to the clockwise bounce, and the second planetary gear 46 is disengaged from the transmission gear 54. (See Figure 3(b))
. As a result, only the spool 52 is driven to wind up the film thereafter. This method allows automatic loading of the film F to be performed reliably. That is, it is not possible to reliably send a portion of the film leader to the spool 52 by simply driving the spool 52 from the beginning, and the film F must also be driven by the drive sprocket 58 until a portion of the film leader is wound around the spool 52. has great advantages for reliable autoloading.

After a portion of the film leader is wound around the spool 52, there is no point in driving the drive sprocket 58, so this embodiment, in which the drive is automatically switched to driving only the spool 52, enables efficient film winding and is effective. is a large one. Note that it is desirable to set the circumferential speed ratio of the spool 52 and the drive sprocket 58 so that the above-mentioned holding of the second planetary lever 44 is performed immediately after the film leader portion is completely wound around the spool 5.2. .

Thereafter, film winding continues until the entire film has been wound. The photographer can confirm the winding state by the intermittent feed rotation of the counter gear 88 based on the driven rotation of the driven sprocket 80. As mentioned above, this counter gear 88 has a film frame number display 88.
C is attached, and the display window 8 provided on the camera body
It can be understood that winding of the film F is being executed by looking at the change in the numbers related to the display 88c from 9 (the area is surrounded by a two-dot chain line in FIG. 2).

When the film F is fully wound and stretched, the rotation of the detection gear 84 interlocked with the driven sprocket 80 is stopped, and the detection gear 84 is moved from the detection board 94 to the microcomputer CPU.
The signal indicating film movement (see FIG. 6) that had been continuously sent to is no longer output, the completion of winding of the film F is detected, and the rotation of the motor M1 is stopped.

Next, rotate motor M1 counterclockwise (hereinafter referred to as reverse rotation).
let Planetary gear 2 of the winding system is activated by reversing the motor Ml.
8 revolves in a direction away from the transmission gear 32, while the planetary gear 106, which is the transmission system on the upper output shaft side, meshes with the transmission gear 120 of the mirror drive/charge drive system due to the revolution.
Mirror drive gear 126 and shutter charge gear 142
Rotate. This rotation moves both gears 126 and 142 to 1
By rotating the movable mirror 134, the movable mirror 134 is driven from the initial state (mirror down → mirror up → mirror down), and the shutter charge lever 146 is driven from charge/recharge release → charge, and the next signal is output from the signal board 160 (see FIG. 8). Detection pattern 162 as shutter charge completion phase
Empty charging is performed until a ground level signal is output from the terminal.

Due to this empty charging operation due to the reverse rotation of the motor Ml,
The switching lever 170 is released from the initial position held by the tension lever 174 and swings clockwise (transition from FIG. 7(a) to FIG. 7(b) to FIG. 7(C)). As a result, the first regulating protrusion 170b of the switching lever 170 is connected to the planetary gear 10.
6 and the rewinding gear 110 (see FIG. 9(b)), while the second regulating protrusion 170c enters between the planetary gear 28 and the transmission gear 32 (see FIG. 10(b)). . Therefore, in the subsequent forward rotation of motor M1, planetary gear 1
06 and the rewind gear 110 can now mesh,
Conversely, meshing between the planetary gear 28 and the transmission gear 32 is prevented.

Next, the motor M1 is rotated forward. This means that the film F is rewound to a predetermined position, that is, to an indexed position that allows accurate rewinding of each frame thereafter. The operation is maintained in this state unless the film frame number display 88c of the counter gear 88 is released.

(Photographing operation) When the release button 2 (see FIG. 1) is pressed and the microcomputer CPU determines that the release switch SW2 is turned on, the motor Ml is reversed. And mirror drive gear 126 and shutter charge gear 14
2 to raise the movable mirror 134 and stop the motor M1 when the shutter charge lever 146 is operated to release the charge (see FIG. 7(b)). In this state, the shutter is operated,
As the shutter rear blade group completes its travel, the motor Ml
Further, when the mirror drive gear 126 and the shutter charge gear 142 are rotated in the reverse direction, the movable mirror 134 is lowered, and the shutter charge lever 146 is operated to charge (see FIG. 7(C)). Stop motor Ml. Immediately, the motor M1 is controlled to rotate in the normal direction, and the planetary gear 106, which is a transmission system on the output shaft side above the motor M1, meshes with the rewinding gear 110 by revolution, and the film is rewinded. In addition, when the motor M1 rotates in the forward direction, the planetary gear 28, which is the transmission system on the lower output shaft side, also revolves and tries to mesh with the transmission gear 32, but in this state, the switching lever 170 is moved as shown in FIG. 7(C).
The second regulating protrusion 170c swings clockwise as shown in FIG.
is inserted between the planetary gear 28 and the transmission gear 32 (see FIG. 10(b)), so the two gears 28 and 32 are not engaged. The output of motor Ml is not transmitted to the hoisting transmission system.

When the film is rewound, the driven sprocket 80 rotates clockwise (in FIG. 2) following the movement of the film, and the detection gear 84 also rotates synchronously.

Then, slightly before the film F is rewound by one frame, the motor M1 is driven under duty control to decelerate, and just when l sternum rewinding is performed, the motor M1 is brake-controlled and stopped.

In this state, the camera enters a standby state for photographing the next frame, the counter gear 88 also rotates clockwise by one pitch, and the frame number display is decremented by one.

Thereafter, each time the release button SW2 is pressed, the above-described operation is repeated and a photograph is taken.

(Rewinding operation) When the shooting operation is completed, the electric film counter is used to check whether the current number of film frames is the first frame, and if it is the first frame, the motor M1 is controlled in forward rotation to advance the film. Involve it in Patrone. The electrical film counter referred to here refers to a counter (register E C0UNT) built into the microcomputer CPU, which counts up every time the film is rolled up for one frame during the preliminary film winding operation, and counts up one frame of film. Countdown when rewinding is complete. This electrical film counter is used for the number of frames corresponding to normal auto-loading at the beginning of winding (3 frames in this example), that is, the part that is exposed when loading the film from the film leader to the enemy's sternum. This information is used to prohibit photography in the area.

When it is detected that the film F has been wound (or immediately before being wound) and the rotation of the driven sprocket 80 has stopped, the motor Ml is stopped.

Then, the motors M and 1 are reversely charged to perform empty charging, and the mirror drive gear 126 and shutter charge gear 1 are
The motor M1 is stopped when the motor M1 is rotated once (operating through the mirror up phase to the mirror down).

The meaning of this empty charge after winding the film is to cause the planetary gear 106 meshing with the rewinding gear 110 to revolve in the direction toward the transmission gear 120 by the film winding operation described above, and to move the planetary gear 28 into the transmission gear. The object is to revolve in a direction away from 32. That is, the positions of both planetary gears 28 and 106 are determined when the switching lever 170 is operated to return to the initial position and swing (counterclockwise) in conjunction with the subsequent opening of the back cover 70 (for film replacement). The purpose is to ensure that the next film preliminary winding operation can be carried out without fail.

Due to the empty charge described above, the planetary gear 106 in particular has revolved toward the transmission gear 120, so when the back cover 70 is opened, the reset lever 178 is swung counterclockwise by the spring 180, as shown in FIG. 9(d). Move and push the protrusion 178b
can push the upper part of the switching lever 170 to swing it counterclockwise (the spring 180 is set with a stronger spring force than the spring 172 for swinging the switching lever 170 clockwise) ).

This counterclockwise rocking of the switching lever 170 causes the tension lever 174 to move (the pin 174C is connected to the guide protrusion 170).
e) and tighten the latch claw 174a with the tension protrusion 1.
70d is a second view of the switching lever 170.

The return and maintenance at the initial position shown in FIG. 7(a) etc. is performed.

Therefore, the first regulating protrusion 170b at the upper end of the switching lever 170 enters between the planetary gear 106 and the rewinding gear 110 and prohibits engagement during normal rotation of the motor M1, while the first regulating protrusion 170b at the lower end The second regulating protrusion 170c is spaced apart from between the planetary gear 28 and the transmission gear 32 to permit meshing during normal rotation of the motor Ml.

Then, when the film F is replaced and the back cover 70 is closed again, the reset lever 178 is pushed by the pushing protrusion 70d and swings clockwise, and the pushing of the switching lever 170 is released. However, as described above, the switching lever 170 can continue to be held because the tensioning lever 174 is engaged with the tensioning protrusion 170d.

Further, when the back cover 70 is opened, the reset lever 60 in the film winding system is released from being pushed by the pushing protrusion 70b, and is pressed by the reset spring 66 to swing clockwise. Therefore, as shown in FIG. 3(C), the holding lever 62 similarly swings clockwise, and the pin 62a
4b to swing the second planetary lever 44 clockwise, returning the second planetary gear 46 to its initial position where it can mesh with the transmission gear 54.

Note that when the back cover 70 is closed again after this, the image shown in Fig. 3 (
Only the state a) is reached, and the position of the second planetary lever 44 does not change.

Further, when the back cover 70 is opened, the counter reset lever 90 in the film counter mechanism is released from the pushing by the pushing protrusion 70c, and is swung counterclockwise by the spring 92. Therefore, the counter reset lever 90
The pushing part 90c pushes the counter feed shaft 86 in the opposite direction to the counter gear 88, freeing the counter gear 88 and moving it to the initial position (the position where "E" is visible in the display window 89) by a spring force (not shown). ) to initialize the number of pieces display. However, in normal shooting operation, when all the frames have been shot and the film winding operation begins, the counter gear 88 has already been intermittently returned to the initial position, so the return operation by the spring described above is The back cover 70 was removed during a demonstration, etc., during a simulated shooting operation without film being inserted into the camera.
This will be done when the project is opened in the middle.

In the film winding drive mechanism in the above-described embodiment, the first planetary lever 42 and the second planetary lever 44 are independently constituted by a common sun gear 38 for the spool 52 side transmission system and the drive sprocket 58 side transmission system. However, this is a measure to be taken if the back cover 70 is opened in the rewound state where all frames of the film have not yet been photographed, and then the back cover 70 is closed again to cause the film to be rewound. That is, when the back cover 70 is opened, the second planetary lever 44 is unlocked and swung, allowing the second planetary gear 46 and the transmission gear 54 to engage with each other. Following the driven rotation of the spool 52 and drive sprocket 58 (rotation in the opposite direction to that during winding), driven rotation of both planetary gears 40 and 46 occurs.

The spool 52 and the driving sprocket 58 have different circumferential speed ratios (the spool 52 is larger), but if a planetary clutch mechanism is also provided in the transmission system on the spool 52 side as in this embodiment, the first planetary lever 42 swings and the first planetary gear 4
0 and the transmission gear 48 are appropriately disengaged, so this can be dealt with.

In the embodiment, a preliminary winding method has been described, but the present invention can also be applied to a normal method, that is, a method of taking pictures while winding the film.

〔Effect of the invention〕

After the start of shooting, a single motor moves the movable mirror up and down and feeds the film for the next frame, or charges and releases the shutter and feeds the film for the next frame, making it automatic, low cost, and economical. Space can be obtained. In addition, since the driving of the movable mirror or shutter charge and the film feeding are separated in sequence, a small motor can be used, and the plane drive can be switched in the direction of rotation of the motor. Since a clutch is provided to switch the transmission system, the configuration is simple.

Furthermore, by making it possible to move the movable mirror up and down or to charge and release the shutter in the same rotational direction of the motor, you can instantly move the movable mirror down or start charging the shutter after taking a picture. This allows you to improve your piece speed.

On the other hand, when a single motor drives the film feeding drive mechanism that feeds the film by rotating only the shaft around which the film is wound, and the preparation mechanism that prepares for the next frame to be photographed, Using a crack that switches the output transmission system by switching the rotation direction, both mechanisms were driven in a series drive sequence by switching the rotation of the motor, so the amount of film wrapped changes and the film is unwound. Substantial changes in the attached axis do not cause any problems (there is little energy loss (and a small motor can be used).

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration and layout of a single-lens reflex camera as an example. FIG. 2 is a perspective view of each structure in FIG. 1. Figure 3 shows the main part of the film winding drive mechanism on the spool side.
These are explanatory diagrams of the operation seen from below, and FIG. 3(a) is at the start of preliminary winding, and FIG. 3(b) is after a part of the film leader is wound around the spool at the beginning of preliminary winding. FIG. 3(C) shows the state with the back cover open. FIG. 4 is a view of the detection gear in FIG. 2 viewed from below. FIG. 5 is a view of the detection board of FIG. 2 viewed from above. FIG. 6 is a time chart of signals obtained from each terminal of the detection board of FIG. 5. FIG. 7 is an explanatory diagram of the film rewinding drive mechanism and mirror box drive mechanism viewed from the side, with FIG. 7(a) showing the initial state or preliminary winding, and FIG. 7(b) showing the mirror up. FIG. 7(C) shows the mirror down state after the mirror box drive mechanism is activated. FIG. 8 is an explanatory diagram of the operation of the brush on the signal board. FIG. 8(a) shows the state in which the shutter charge is completed (mirror down), and FIG. 8(b) shows the state in which the mirror up is completed (shutter charge is released). FIG. 9 is an explanatory diagram of the operation of the film rewinding drive mechanism seen from above. FIG. 9(a) shows the initial state or preliminary winding, and FIG. 9(b) shows the mirror box drive mechanism by reversing the motor. During operation, FIG. 9(C) shows when the film rewind drive mechanism is operated by normal rotation of the motor, and FIG. 9(d) shows when the back cover is opened. Fig. 10 is an explanatory diagram of the operation of the main part of the motor side of the film winding drive mechanism viewed from below. Fig. 10 (a) is in the initial state or during preliminary winding, and Fig. 10 (b) is when the motor is reversed. When the mirror box drive mechanism is in operation, Figure 1O (C) shows that when the film rewind drive mechanism is operated by normal rotation of the motor, the first
Figure O (d) is when the back lid is open. FIG. 11 is a circuit diagram of main parts related to camera control. FIGS. 12 and 13 are flowcharts. Figure 2 (b) Hiro O

Claims (7)

[Claims] (1) A motor; and using the output of the motor as a drive source, swinging the movable mirror from the finder observation position to the exposure retreat position based on the rotation of the motor in the first direction, and continuing the rotation in the same first direction. a mirror drive mechanism that returns to the viewfinder observation position based on the rotation of the motor; and a film feed drive mechanism that uses the output of the motor as a drive source and feeds the film for shooting the next frame based on rotation of the motor in a second direction. and a clutch mechanism that transmits an output to the mirror drive mechanism based on the rotation of the motor in the first direction and transmits the output to the film feeding drive mechanism based on the rotation of the motor in the second direction. , rotating the motor in the first direction to swing the movable mirror to the exposure retreat position in response to a shooting start operation, and moving the mirror to the finder observation position in response to subsequent exposure completion; control means for rotating the motor in the first direction so as to return to the original position, and then rotating the motor in the second direction to feed the film for photographing the next frame; Motor driven camera with. (2) a motor; the output of the motor is used as a driving source; the shutter is driven from a charging state to a charging release direction based on the rotation of the motor in a first direction; and the shutter is also charged based on continued rotation in the first direction; a shutter charge mechanism that uses the output of the motor as a drive source and feeds the film for shooting the next frame based on rotation of the motor in a second direction; a clutch mechanism configured to transmit an output to the shutter charge mechanism based on the rotation in the first direction and to transmit the output to the film feeding drive mechanism based on the rotation in the second direction; In response, the motor is rotated in the first direction to drive the shutter to the uncharged state, and in response to subsequent completion of exposure, the motor is rotated to drive the shutter to the charged state. A motor-driven camera comprising: control means for rotating the motor in the first direction, and then rotating the motor in the second direction to feed the film for photographing the next frame. (3) a motor; a preparation mechanism that uses the output of the motor as a drive source and prepares for the next frame photographing based on rotation of the motor in a first direction; a film feeding drive mechanism that rotates only the shaft around which the film is wound based on the rotation of the motor in the second direction and feeds the film for shooting the next frame; and the rotation of the motor in the first direction; a clutch mechanism that transmits an output to the preparatory operation mechanism based on the rotation in the second direction and transmits the output to the film feeding drive mechanism based on the rotation in the second direction; control means for rotating the motor in the second direction to drive the preparatory operation mechanism, and then rotating the motor in the second direction to feed the film for photographing the next frame; driving camera. (4) In a motor-driven camera with a pre-winding method in which the film is wound for all frames in advance when loading the film, and the film is rewound one frame at a time each time a photograph is taken, a motor and the output of the motor are used as the driving source. , a preparation mechanism that prepares for photographing the next frame based on the rotation of the motor in a first direction; and a rewind gear that uses the output of the motor as a drive source and is based on the rotation of the motor in a second direction. a film feeding drive mechanism that rotates the motor and rewinds the film for photographing the next frame; and a film feeding mechanism that transmits an output to the preparatory operation mechanism based on the rotation of the motor in the first direction, a clutch mechanism that switches to transmit an output to the film feeding drive mechanism based on the rotation of the motor; and a clutch mechanism that rotates the motor in the first direction in response to completion of exposure to drive the preparatory operation mechanism; and control means for rotating the motor in the second direction to rewind the film for photographing the next frame. (5) The motor according to claim 3 or 4, wherein the preparatory operation mechanism swings the movable mirror from the exposure retreat position to the finder observation position so that the subject can be visually recognized through the finder for next frame photography. driving camera. (6) The motor-driven camera according to claim 3 or 4, wherein the preparatory operation mechanism charges and drives the shutter to prepare for photographing the next frame. (7) The motor-driven camera according to claim 1, 2 or 3, wherein the film feeding drive mechanism drives a rewinding gear in a rewinding direction by the motor to rewind the film.