JP3315895B2 - Motor-driven single-lens reflex camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-lens reflex camera in which a mirror / shutter system and a film feeding system are driven by one motor.

[0002]

2. Description of the Related Art In a motor-driven single-lens reflex camera, a motor for driving a mirror / shutter drive system to control the elevation of a mirror and charge a shutter, and for driving a film feed system to wind up a film. There is a so-called one-motor drive type in which both a mirror / shutter system and a film feeding system are driven by forward and reverse rotations of one motor, in addition to a type in which a motor for performing rewinding is separately provided.
In the one-motor type, the camera can be reduced in size and cost, but the switching of the driving direction is complicated, so that the operation variation and the driving speed are restricted. For example, it is difficult to perform an operation different from a normal photographing sequence such as multiple exposure.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is directed to a single-lens reflex camera that drives a mirror / shutter drive system and a film feeding system with one motor, and a motor capable of multiple exposure. An object of the present invention is to provide a driving single-lens reflex camera with a simple configuration.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a motor for controlling the raising and lowering of a mirror and shutter charging by a mirror / shutter drive system and winding and rewinding a film by a film feed system by rotating one motor in the forward and reverse directions. The present invention relates to a driving single-lens reflex camera. The motor-driven single-lens reflex camera according to the present invention has a locking lever that can be moved between a clutch fixing position and a clutch switching allowable position. The motor transmits the driving force in the forward and reverse directions to the mirror / shutter drive system. When the locking lever is at the clutch switching allowable position, the motor is driven in accordance with the forward / reverse rotation of the motor and the mirror / shutter drive system and the film feeding system. A first clutch means for switching and interlocking with the first clutch means; having a forcible lever movable between a winding position and a rewinding position, wherein the motor is interlocked with the film feeding system by the first clutch means. A second clutch means for interlocking the motor with the winding system when the forcible lever is at the winding position and switching the motor to the rewind system when the force lever is at the rewinding position; The first clutch means is rotated when the rotation of the motor is interlocked with the mirror / shutter drive system, and holds the lowered state of the mirror and the charged state of the shutter at the charged position; A one-rotation cam for raising the mirror and releasing the shutter charge at a rewind rotation position provided on the one-rotation cam and located at a rotation position opposite to the exposure rotation position around the charge position. A forcible lever cam for forcibly moving the forcible lever from a winding position to a rewind position; and a forcible lever cam provided on the one-rotation cam, wherein when the one-rotation cam is at the exposure rotation position, the locking lever is moved to the clutch fixing position, A locking lever cam for moving the locking lever to the clutch switching allowable position when in the rewind rotation position. In the sequence, the motor is rotated forward to rotate the one-rotation cam forward from the charge position to the exposure rotation position for exposure, and then the motor is rotated reverse to rotate the one-rotation cam reversely from the exposure rotation position to the charge position to rotate the mirror. Perform lowering and shutter charging, and further wind the film by reversing the motor. At the time of multiple exposure, after at least one exposure,
It is characterized in that the motor is stopped and then the motor is stopped after the mirror is lowered and the shutter is charged.

In the reverse rotation of the single rotation cam from the exposure rotation position, the lowering of the mirror and the charging of the shutter are set to be completed at least before the locking lever moves to the clutch switching allowable position. If the motor is stopped before the locking lever moves to the clutch switching allowable position, multiple exposure can be performed with a fast operation.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A new photo system (ADVANCED
The present invention will be described based on an embodiment applied to a single-lens reflex camera compatible with PHOTO SYSTEM. First, a self-propelled film cartridge will be briefly described with reference to FIGS. The film cartridge 90 has a film F wound around a cartridge spool 92 rotatably housed in a cylindrical housing 91. Film F has two perforations P for each frame.
Are formed. A substantially cylindrical bearing hole 93 formed at one end of the cartridge spool 92 faces one end surface of the housing 91. On one side surface of the housing 91, a film advance / retreat port 95 which is vertically long in the axial direction is formed,
A light-shielding door 97 for opening and closing the film advancing / removing port 95 is provided. The light shielding door 97 is rotatably supported in the housing 91, and opens and closes the film advance / retreat port 95 by the rotation. Further, the end face of the housing 91 is cut out, and the data disk 99 is partially exposed. The data disk 99 is rotated integrally with the cartridge spool 92, and the number of photographed films F and the film sensitivity are indicated by bar codes on the surface thereof.

On the other hand, as shown in FIG.
Four exposure state display holes 94 are formed in the other end surface of the unit 1. Each hole has a shape that corresponds to each state of unexposed, partial exposure (when rewinding halfway without photographing the last frame of the film), exposed (exposure to the last frame), and developed. I make them different. A rotation position indicating plate 96 is provided at an end of the cartridge spool 92 opposite to the bearing hole 93.
Project in the radial direction. By controlling the rotation stop position of the cartridge spool 92, the four exposure state display holes 9 are controlled.
The exposure state of the film cartridge 90 can be visually detected by making the rotation position display plate 96 face any one of the four positions.

FIG. 1 schematically shows the internal structure of a single-lens reflex camera using a film cartridge 90 from the front of the camera. At substantially the center of the horizontally long camera body 11, a photographing lens 12 which is detachable from the camera body 11 is mounted, and a cylindrical film cartridge storage chamber is provided on the right side of the drawing with a photographing optical path 13 behind the photographing lens 12. 14. On the left side, a cylindrical winding spool chamber 15 is also arranged. A cartridge spool drive shaft 42 projects axially from one end face of the film cartridge storage chamber 14. The cartridge spool drive shaft 42 has a shape that engages with the bearing hole 93 when the film cartridge 90 is loaded into the film cartridge storage chamber 14 and transmits a driving force to the cartridge spool 92 without relative rotation. The camera body 11 is provided with a cartridge insertion hole (not shown) for communicating the film cartridge storage chamber 14 with the outside, and an opening / closing lid (not shown) with a lock mechanism is provided in the insertion hole. On the other hand, a cylindrical hoisting spool 16 is disposed in the hoisting spool chamber 15, and a motor 17 serving as a driving source for the entire camera is installed in a hollow shaft portion of the hoisting spool 16. The motor 17 projects an output shaft 17a toward the bottom of the camera, and the driving force of the motor 17 is transmitted from the output shaft 17a to the film feeding mechanism 18 or the mirror / shutter driving mechanism 19. The film feeding mechanism 18 includes an output shaft 17 of a motor 17.
and a gear train connected from the output shaft 17a to the winding spool 16 and a gear train connected from the output shaft 17a through the lower part of the photographing optical path 13 to the lower part of the film cartridge storage chamber 14 and connected to the cartridge spool drive shaft 42. I have. The mirror / shutter drive mechanism 19 is arranged along the side of the photographing optical path 13.

FIG. 2 shows the entire film feeding mechanism 18 and the mirror / shutter driving mechanism 19 shown from the bottom side of the camera.
Part of. A pinion 21 provided at the end of the output shaft 17a of the motor 17 meshes with a large-diameter gear of a two-stage transmission gear 22. Each of the transmission gear 22, the transmission gear 23 and the transmission gear 24 is a two-stage gear, and each of the two-stage gears meshes a small-diameter gear with a large-diameter gear of the next gear to output the shaft 17a.
Slow down the rotation of. A large-diameter gear 25 meshes with a small-diameter gear of the transmission gear 24, and a first sun gear 26 is axially supported coaxially with the large-diameter gear 25. Large diameter gear 25 and first
The sun gear 26 rotates integrally. The rotation shaft of the first sun gear 26 further rotatably supports the base end of the revolution support arm 28. The first near the tip of the orbital support arm 28
A planet gear 27 is pivotally supported and meshes with the first sun gear 26. Therefore, the first sun gear 26 (and the large-diameter gear 2)
When 5) rotates, the first planetary gear 27 supported by the revolving support arm 28 revolves along the peripheral surface of the first sun gear 26 in the same direction as the rotation direction, and when the revolving is restricted, the first planetary gear 27 rotates. At the restricted position, the first sun gear 26 rotates in a direction opposite to the rotation of the first sun gear 26.

The first planetary gear 27 meshes with either the cam drive gear 29 which is pivotally supported on the front side in the camera body or the second sun gear 30 which is pivotally supported on the rear side by revolving. At the point of engagement, the revolution of the first planetary gear 27 is regulated, and the torque of the motor 17 is transmitted to the cam drive gear 29 or the second sun gear 30. Specifically, when the output shaft 17a (pinion 21) of the motor 17 rotates counterclockwise in FIG. 2, the first sun gear 26 rotates counterclockwise, and the first planetary gear 27 Revolves in the direction that meshes with 29. Similarly, when the output shaft 17a (pinion 21) of the motor 17 rotates clockwise in FIG.
The sun gear 26 is rotated clockwise and the first planetary gear 27
Revolves in a direction that meshes with the second sun gear 30. The cam drive gear 29 is a gear constituting the mirror / shutter drive mechanism 19, and the second sun gear 30 is a gear constituting the film feed mechanism 18.
Therefore, when the first planetary gear 27 revolves, one of the film feeding mechanism 18 and the mirror / shutter driving mechanism 19 is interlocked with the motor 17. Accordingly, the planetary gear mechanism including the first sun gear 26, the first planetary gear 27, and the revolving support arm 28
A first clutch mechanism for switching the interlocking direction to a mirror / shutter system or a film feeding system according to the forward / reverse rotation of the motor 7.

The first clutch mechanism has a locking lever 20. The locking lever 20 is the stopper 2
It has an L-shape composed of a long side provided with the cam engaging arm 20b and a long side provided with the cam engaging arm 20b. The stopper portion 20a extends in the direction of the revolving support arm 28. When the locking lever 20 swings while the first planetary gear 27 is engaged with the cam drive gear 29, the stopper portion 20a revolves. It is disengaged from the tip of the support arm 28. Stopper part 20a
The first planetary gear 27 in the engagement state of the
Is regulated. That is, the switching operation of the first clutch mechanism is restricted (FIGS. 7 and 9). This is the locking lever 20
(The clutch fixing position). Lock lever 2
When 0 is rotated clockwise from the clutch fixed position,
The stopper 20a moves to release the lock (FIG. 5,
6 and 8). This is referred to as a lock release position of the lock lever 20 (a clutch switching allowable position). Therefore, when the locking lever 20 is at the unlocking position, the first clutch mechanism operates in response to the forward and reverse rotation of the motor 17.
8 or the mirror / shutter drive mechanism 19, and when the locking lever 20 is at the locking position, the cam driving gear 29 is rotated in the forward or reverse direction according to the forward or reverse rotation of the motor 17. The locking lever 20 is a torsion spring 2
Oc is biased to the locking position.

Among the driving mechanisms controlled by the first clutch mechanism to be linked with the motor 17, first, the film feeding mechanism 1
8 will be described. The second sun gear 30 is the camera body 1
1 and is rotatably supported by a fixed shaft in the rotation support arm 31. The orbital support arm 31 pivotally supports a second planetary gear 32 on the distal end side, and the second planetary gear 32 meshes with the second sun gear 30. Thus, when the second sun gear 30 rotates in the forward and reverse directions, the second planetary gear 32 revolves along the peripheral surface of the second sun gear 30 in the same direction as the rotation direction. By this revolution, the second planetary gear 32 meshes with one of the hoisting direction gear 33 (large-diameter gear 33a) and the rewinding direction gear 34 (small-diameter gear 34b). The hoisting direction gear 33 and the rewinding direction gear 34 are both supported by a fixed shaft in the camera body 11. When the second planetary gear 32 meshes with either of them, the revolution is restricted and the driving force of the motor 17 is transmitted. I do.

The hoisting direction gear 33 and the rewinding direction gear 34 are both two-stage gears.
An idle gear 35 meshes with the rewind gear 3b.
The idle gear 36 meshes with the large-diameter gear 34a, and the idle gears 35 and 36 mesh with each other. Since two gears are sandwiched, the rotation directions of the hoisting direction gear 33 and the rewinding direction gear 34 are opposite. However, the rewinding direction gear 34 transmits only the counterclockwise rotation of the large-diameter gear 34a in FIG. 2 to the small-diameter gear 34b and interlocks it, and the rotation of the small-diameter gear 34b is not transmitted to the large-diameter gear 34a. It is a one-way clutch. Therefore, when the second planetary gear 32 meshes with the rewind direction gear 34, the hoisting direction gear 3
3 is not driven.

The small-diameter gear 33b of the hoisting direction gear 33 has
The relay gear 37 meshes separately from the idle gear 35,
This relay gear 37 meshes with a hoisting spool drive gear 38. The hoist spool drive gear 38 is a hoist spool 1
6 is a gear that is fixed to the peripheral surface and rotates the same. On the other hand, the transmission gear 4 is attached to the small diameter gear 34b of the rewind direction gear 34.
0a is engaged. Ten gears from the transmission gear 40a to the transmission gear 40j are sequentially meshed to form a reduction gear train 40, and the transmission gear 40j is meshed with the cartridge spool drive gear 41. The cartridge spool drive gear 41 is a gear formed coaxially and integrally with the cartridge spool drive shaft 42 projecting into the film cartridge storage chamber 14.

When the second planetary gear 32 meshes with the hoisting direction gear 33 (large diameter gear 33a), the rewinding direction gear 34
Is rotated in the counterclockwise direction in FIG. 2, the one-way clutch is connected, and the cartridge spool drive shaft 42 rotates in the clockwise direction in FIG. With this rotation, the film F is sent out from the film cartridge 90 toward the winding spool 16.
On the other hand, when the second planetary gear 32 meshes with the rewind direction gear 34 (small diameter gear 34b), as described above, the small diameter gear 3
Since the driving force is not transmitted from 4b to the large-diameter gear 34a,
The rewinding of the film F is performed by the cartridge spool drive shaft 4.
2 is performed only by the counterclockwise rotation in FIG. That is, the gears from the winding direction gear 33 to the winding spool drive gear 38 form a gear train dedicated to film winding, and the gears from the rewinding direction gear 34 to the cartridge spool driving gear 41 extend in both the film sending and rewinding directions. The gear train that operates in the manner described above. The gears constituting these gear trains are all one-stage or two-stage flat gears, and their rotation axes are substantially parallel.

In the operation in the film winding direction, the gear ratio is set such that the winding spool 16 rotates faster than the cartridge spool driving shaft 42. Therefore, when the film F sent from the cartridge spool 92 is wound around the winding spool 16, the winding is mainly performed by the rotational force of the winding spool 16. At this time, the one-way clutch of the rewinding direction gear 34 is a slip clutch that can perform a certain slip when the clutch is connected so that excessive tension does not act on the film F due to the peripheral speed ratio of the two spools.

As described above, the planetary gear mechanism including the second sun gear 30, the revolving support arm 31, and the second planetary gear 32
A second clutch mechanism for changing the feeding direction of the film F in the film feeding mechanism 18 is configured. The second clutch mechanism includes a torsion spring 46 hung on the revolution support arm 31, and a spring end 46a of the torsion spring 46 extends inward of the camera.

The second clutch mechanism has a forcible lever 76 which is supported in the camera body 11. The forcible lever 76 has a pair of engaging pins 77 at one end centering on the support shaft, and has an operating pin 78 at the other end. The operating pin 78 is located near the spring end 46a of the torsion spring 46. Has been extended to. The operation pin 78 is disengaged from the spring end 46a by the swing of the forcible lever 76, and pushes the torsion spring 46 (spring end 46a) by the rotation of the forcible lever 76 in the direction in which the engagement occurs. When the spring end 46a is pushed in, the revolving support arm 31 is rotated counterclockwise in FIG. 2, and the second planetary gear 32 revolves and the rewinding direction gear 34
(Small diameter gear 34b). When the operating pin 78 is not engaged with the spring end 46a, the forcible lever 76 is in the second position.
Without operating the clutch mechanism, the second clutch mechanism
The clockwise rotation of the sun gear 30 causes the second planetary gear 32
Can be connected to the hoisting direction gear 33. That is, the forcible lever 76 has a non-forcible position (FIGS. 5, 7, 8, and 9) that allows the second clutch mechanism to be connected to the upper side of the winding, and a second clutch by pressing the spring end 46a. It has a forced position (FIG. 6) for forcibly connecting the mechanism to the rewind side.

Next, the mirror / shutter driving mechanism 19 will be described. Inside the camera body 11, a one-turn cam gear 50 that rotates in a plane parallel to each gear of the film feeding mechanism 18 is supported. The peripheral gear 51 is formed on the one-turn cam gear 50, and the cam drive gear 29 is meshed with the peripheral gear 51. A cam groove 52 is provided on the back surface of the one-turn cam gear 50 in FIG.
Are formed. The cam groove 52 is provided for the one-turn cam gear 50.
And an eccentric cam portion 54 having an arc shape centered on the support shaft of the eccentric cam.

The driving lever 5 is coaxial with the cam driving gear 29.
One end of 5 is rotatably supported. A drive lever 55 extending in the longitudinal direction of the camera body 11 has a follower pin 56 protruding at an intermediate portion thereof fitted in the cam groove 52, and has a pair of holding pins 5 at the tip end facing upward from the camera.
7 are protruded. While the one-rotation cam gear 50 makes one rotation, the follower pin 56 is guided by the cam groove 52, and the drive lever 55 reciprocates with a constant width around the support shaft.
At this time, the positions of the pair of holding pins 57 are shifted in the front-back direction of the camera. Specifically, when the follower pin 56 is guided by the concentric cam portion 53, the pair of holding pins 57
Is positioned in front of the camera (FIGS. 3, 5, 6, 8, and 9), and when the follower pin 56 is guided by the eccentric cam portion 54, the rotation for moving the holding pin 57 to the rear of the camera is performed. It is provided to the drive lever 55 (FIGS. 4 and 7).

3 and 4 show the operation state of the mirror / shutter drive mechanism 19 from the side of the camera. Above the drive lever 55 in the camera body 11, a support shaft 60x whose axis is orthogonal to a plane including the photographing optical axis of the camera is provided, and the intermediate portion of the first link 60 is rotatable. Supported. At the lower end of the first link 60, a driven pin 61 which is tightly held by a pair of holding pins 57 of the drive lever 55 is fixedly provided. Therefore the first
When the drive lever 55 is reciprocated in the front-rear direction of the camera, the link 60 swings following the rotation. The upper end of the first link 60 is connected to the lower end of the second link 62 so as to be relatively rotatable, and the upper end of the second link 62 is connected to the support shaft 6.
It is rotatably connected to one end of a charge lever 64 that rotates about 4x. A shutter charge protrusion 6 is provided at the end of the charge lever 64 opposite to the support shaft 64x.
6 and a mirror operation section 67 are formed. First link 6
When the second link 62 swings in accordance with 0, the charge lever 64 also rotates about the support shaft 64x to form a four-bar linkage. The link mechanism causes the shutter charge protrusion 66 and the end on the mirror operating section 67 side to move up and down in response to the reciprocating movement of the drive lever 55.

The shutter charge projection 66 charges the shutter member (not shown) when the charge lever 64 rotates downward from the position shown in FIG. 4 to the position shown in FIG. At the shutter charge position, the shutter charge protrusion 66 mechanically locks the travel of the shutter.
The shutter mechanism of this camera is an electromagnetically controlled focal plane shutter that can be electromagnetically held by energizing two shutter holding magnets 89 (FIG. 15) for the first and second curtains. When the charge lever 64 moves to the raised position in FIG. 3 with the magnet 89 energized, the mechanical holding is released. Here, when the energization of the magnet 89 is released, the shutter runs.

The camera body 11 further includes a support shaft 70x having an axis substantially perpendicular to a plane including the photographing optical axis.
Is provided, and a mirror 70 is pivotally supported on the mirror. The mirror 70 can rotate about the support shaft 70x to move up and down to an observation position that advances into the imaging optical path 13 and an imaging position that retreats from the imaging optical path 13. At the observation position, the mirror 70 is positioned on the photographing optical axis of the camera,
2 can be observed from a viewfinder (not shown) via an observation optical system including the mirror 70. On the other hand, since the mirror 70 is retracted from the position on the optical axis at the shooting position, the film F can be exposed by the shutter running.
A spring hook pin 71 protrudes from a side surface of the mirror sheet 70a, and both ends of a torsion spring 72 are hooked on the spring hook pin 71 and a spring hook projection 68 provided on the charge lever 64.

The mirror operating section 6 of the charge lever 64
Reference numeral 7 denotes a position at which the mirror 70 can be disengaged from the mirror sheet 70a. When the charge lever 64 rotates upward from the position shown in FIG. 3 to the position shown in FIG. 4, the mirror operating section 67 takes an image of the mirror 70 against the torsion spring 72. Push up to a possible position. At this time, the torsion spring 72 bends by a fixed amount, and the force urging the mirror 70 in the downward direction is charged. Charge lever 6
When the mirror 4 is rotated downward from the position shown in FIG. 4 to the position shown in FIG. 3, the push-up of the mirror operating section 67 is released, and the mirror 70 is lowered to the observation position by the urging force of the torsion spring 72. The mirror / shutter driving mechanism 19 has the above-described configuration in which the rotation of the one-rotation cam gear 50 is linked with the movement of the mirror up and down and the shutter charging operation, and when the follower pin 56 of the drive lever 55 is guided by the concentric cam portion 53, the mirror lowers. When the follower pin 56 is guided by the eccentric cam portion 54 in the shutter charge state, the mirror is raised and the shutter charge is released.

The one-rotation cam gear 50 is further provided with a locking lever cam 74 fixed on the same surface as the cam groove 52, and a forcible lever cam 75 is fixed on the opposite surface (paper side in FIG. 2, camera bottom side). Has been established. Lock lever cam 74
Is located at a position where it is disengaged from the cam engaging arm 20b of the locking lever 20 by the rotation of the single-rotation cam gear 50, and when the engagement occurs, the cam engaging arm 20b is pushed into the torsion spring 20c. This is a cam that moves the lock lever 20 to the lock release position in opposition. The locking lever cam 74 is formed in an elongated arc shape. When the one-rotation cam gear 50 rotates, the forcible lever cam 75 engages with the engaging pin 77 of the forcible lever 76.
And when the engagement occurs, the engagement pin 7
7 is a cam that pushes in 7 to move the forcible lever 76 to the forcible position. The forcible lever cam 75 is located on the back side of the locking lever cam 74 and is formed in an arc shape shorter than the locking lever cam 74.

The single-rotation cam gear 50, which controls the vertical movement of the mirror and the shutter charge by means of these two cams, controls the switching of the first clutch and the second clutch mechanism at a predetermined rotation position. In particular, when the first clutch mechanism is controlled via the locking lever 20, the rotation direction of the one-turn cam gear 50 can be changed. For example, when the locking lever cam 74 is not engaged with the cam engaging arm 20b and the locking lever 20 is in the locked position, the first clutch mechanism operates as a mirror
The output shaft 17 is fixed to the shutter drive mechanism 19 side.
When the motor 17 is driven so that a rotates in the counterclockwise direction in FIG. 2 (hereinafter, this driving direction is referred to as forward rotation of the motor 17), the one-turn cam gear 50 is rotated clockwise (hereinafter, forward rotation). When the motor 17 is driven so that the output shaft 17a rotates clockwise (hereinafter, referred to as reverse rotation of the motor 17), the one-turn cam gear 50 rotates counterclockwise (hereinafter, referred to as reverse rotation). . On the other hand, the locking lever cam 7
4 is engaged with the cam engaging arm 20b and the locking lever 20 is moved to the unlocking position. In the forward rotation of the motor 17, the one-rotation cam gear 50 similarly rotates forward.
In the reverse rotation, the first planetary gear 27 revolves toward the second sun gear 30, so that the one-turn cam gear 50 does not rotate in the reverse direction. That is, as shown by the thick arrow in FIG. 14, the forward rotation of the motor 17 allows the one-rotation cam gear 50 to rotate forward regardless of the position of the locking lever 20, but the reverse rotation of the motor 17 Only when the lever 20 is at the locking position, the one-turn cam gear 50 can be rotated in the reverse direction.

The one-rotation cam gear 50 is provided with a brush 59 which is integrally rotated. Meanwhile, the camera body 11
Switch contact pieces 80a, 8 slidingly contacting the brush 59 are provided therein.
The switch board 80 having the first and second switch boards 80b, 80c, and 80d and the land contact piece 80e is disposed.
3). The inner peripheral contact piece of the brush 59 and the land contact piece 80e are always in contact, and the rotation of the one-rotation cam gear 50 causes the outer peripheral contact piece of the brush 59 to change from the switch contact pieces 80a to 80d.
When one of these contacts is made, the control circuit 100 of the camera is energized. That is, the switch board 80 and the brush 59 constitute a switch mechanism for detecting the rotation position of the one-turn cam gear 50. A change in the rotational position of the one-turn cam gear 50 detected by this switch mechanism and a mirror
The control status of the shutter drive mechanism 19 and the two clutch mechanisms will be described with reference to FIGS.

When the brush 59 and the switch contact piece 80a are in contact with each other, the one-turn cam gear 50 is at the rotation position shown in FIG. At this time, the follower pin 56 of the drive lever 55 is engaged with the concentric cam portion 53, and the mirror / shutter drive mechanism 19 is in the mirror lowered (observation position) and shutter charged state shown in FIG. The locking lever cam 74 of the one-rotation cam gear 50 is engaged with the cam engaging arm 20b, and the locking lever 20 is held at the unlocked position against the torsion spring 20c. Also, the forcible lever cam 75 is
7, the forcible lever 76 is in the non-forcible position, and the second clutch mechanism can be connected to the upper side by rotating the second sun gear 30 clockwise. When the motor is driven forward in this state, the first clutch mechanism is connected to the mirror / shutter drive mechanism 19 and the one-rotation cam gear 50 is rotated forward. The film F can be wound up by being connected to the feeding mechanism 18 side and the second clutch mechanism being connected to the winding up side (FIG. 5). To put it the other way around, the single rotation cam gear 50 is not reversely rotated by the reverse rotation drive of the motor 17. This rotational position is referred to as an initial position of the one-turn cam gear 50, and the contact state between the brush 59 and the switch contact piece 80a is an ON state of the initial position switch.

When the brush 59 and the switch contact piece 80b are in contact with each other, the one-turn cam gear 50 is at the rotation position shown in FIG. In this rotation position, the follower pin 56 of the drive lever 55 is engaged with the concentric cam portion 53, and the mirror / shutter drive mechanism 19 is in the mirror lowered (observation position) and shutter charged state shown in FIG. The locking lever cam 74 is engaged with the cam engaging arm 20b, and the locking lever 20 is held at the unlocked position. Further, since the forcible lever cam 75 also engages with the engagement pin 77, the forcible lever 76 has been moved to the forcible position, and the second clutch mechanism is connected to the rewind side (rewind direction gear 34). Therefore, when the motor 17 is rotated forward, the one-rotation cam gear 50 is rotated forward similarly to the initial position. On the other hand, in the reverse rotation drive of the motor 17, the first clutch mechanism is connected to the film feeding mechanism 18 side, and the film F can be rewound. This rotation position is referred to as the rewind rotation position of the one-turn cam gear 50, and the state of contact between the brush 59 and the switch contact piece 80b is the ON state of the rewind rotation position switch.

When the brush 59 and the switch contact piece 80c are in contact with each other, the one-turn cam gear 50 is at the rotation position shown in FIG. In FIG. 7, the follower pin 56 of the drive lever 55 is guided by the eccentric cam portion 54, and the mirror / shutter drive mechanism 19 is in the mirror lift (photographing position) and shutter charge release state of FIG. That is, the mirror / shutter driving mechanism 19 is in an exposure-enabled state. This rotation position is called an exposure rotation position (mirror up position) of the one-rotation cam gear 50, and the contact state between the brush 59 and the switch contact piece 80c is an ON state of the exposure rotation position switch. In the exposure rotation position, the locking lever cam 74 does not engage with the cam engaging arm 20b, and the forcible lever cam 75 does not engage with the engaging pin 77, so that the locking lever 20 is held at the locking position. 76 is in the non-compulsory position. Therefore, the first clutch mechanism is the mirror / shutter drive mechanism 19 (the cam drive gear 2).
9), and the second clutch mechanism receives the clockwise rotation of the second sun gear 30 and raises it upward (the hoisting gear 3).
It can be connected to 3). Since the revolution of the first planetary gear 27 is restricted while meshing with the cam driving gear 29, the driving force of the motor 17 is controlled by the mirror / shutter driving mechanism 1
The single-rotation cam gear 50 is forward-reversely rotated according to the forward / reverse drive of the motor 17.

When the motor 17 is driven to rotate in the reverse direction while the one-rotation cam gear 50 is at the exposure rotation position, the one-rotation cam gear 50 rotates in the reverse direction while the locking lever 20 is held at the locking position. Before the switch contact piece 80a and the brush 59 come into contact (before reaching the initial position), the locking lever cam 7
4 is engaged with the cam engaging arm 20b, and the torsion spring 20
The lock lever 20 moves to the lock release position side against the urging force of c. The reverse drive of the motor 17 is a drive in a direction in which the first clutch mechanism is connected to the film feed mechanism 18 if the lock of the lock lever 20 is released.
The planet gear 27 starts revolving. Here, cam drive gear 2
9, the one-rotation cam gear 50 stops at the position shown in FIG. 8, which is different from the initial position (when the initial position switch is turned on) in FIG. As shown in FIG. 14, when the motor 17 is rotated forward, the one-rotation cam gear 50 rotates forward, but when the motor 17 is rotated in the reverse direction, the one-rotation cam gear 50 is not rotated backward from that position, and the first planetary gear is not rotated. The gear 27 meshes with the second sun gear 30, thereby revolving the second sun gear 30.
The winding operation of the film F is started when the planetary gear 32 meshes with the winding direction gear 33. Although the rotation position of the one-turn cam gear 50 is not detected by the switch mechanism, the rotation position is different from the above-described initial position, and is therefore particularly referred to as a winding rotation position. At the hoisting rotation position, the mirror / shutter drive mechanism 19 is in the mirror lowering (observation position) and shutter charging states shown in FIG.

In the reverse rotation of the single-rotation cam gear 50 from the exposure rotation position to the winding rotation position, the mirror 70 is moved by the cam groove 52 before the locking lever cam 74 moves the locking lever 20 to the unlocking position. And the shutter charge is completed. This camera is provided with a switch contact piece 80d for detecting the rotation position (FIG. 9) of the one-turn cam gear 50 that is in the mirror lowered and shutter charged state and that holds the locking lever 20 in the locked position. .
Since this rotational position is used at the time of the multiple exposure operation, the position shown in FIG. 9 is called a multiple exposure rotational position, and the contact state between the brush 59 and the switch contact piece 80d is set to a multiple exposure rotational position switch ON. The multiple exposure rotation position and the initial position and the winding rotation position are common in that the mirror / shutter drive mechanism 19 prepares for exposure. Since it is possible to start the operation, it can be said that the one-turn cam gear 50 is charged.

FIG. 15 conceptually shows an electric circuit of the camera of this embodiment. The rotation position of the one-turn cam gear 50 is transmitted to the control circuit of the camera by the brush 59 and the switch board 80. In addition, instead of the switch board 80,
The single-rotation cam gear 50 is brought into sliding contact with a plurality of contact pieces of the brush 59.
It is also possible to use a code plate for detecting the rotational position of the control panel. The camera is provided with a release switch 81, a forced rewind switch 82, a rewind light switch 83, and a multiple exposure operation switch 84 that can be operated from the outside. Each of these switches is connected to the control circuit 100, and an on / off signal of each switch is input. An open / close lid lock switch 79 for detecting a locked state of the open / close lid (not shown) of the film cartridge storage chamber 14 is also connected to the control circuit.

The camera has a magnetic head 85 controlled by the control circuit 100. The magnetic head 85 can write photographing conditions (such as whether or not strobe light is emitted), date, number of additional prints, text messages, and the like as magnetic information encoded on the magnetic layer of the film F. Magnetic head 85
Is positioned closer to the winding spool chamber 15 than the photographic optical axis in the feeding direction of the film F (FIG. 2), and writing of magnetic information is performed during the winding operation after exposure of the photographic frame. Rewind writing is a function of re-recording (correcting) the magnetic information recorded in this way later. Although the details of the operation will be described later, since the position of the magnetic head 85 is fixed, when performing a rewind write, the photographing end frame once wound up is rewound to the photographing position behind the photographing optical path 13 and the frame is sent out again. It is necessary to perform magnetic writing while feeding in the direction.

The control circuit 100 is further linked with a film feed control sensor 86 provided for each frame of the film F and detecting a perforation P. The film feed control sensor 86 is used to send out the film F. The amount and the rewind amount (frame position) are detected. The timing of the start of magnetic writing by the magnetic head 85 is similarly controlled by the control circuit 100 using the magnetic write control sensor 87 that detects the perforation P. A data reader 88 for reading the data disk 99 of the film cartridge 90 is provided in the film cartridge storage chamber 14, and the read data is input to the control circuit 100.

The motor-driven camera having the above-mentioned structure is composed of: Film thrust processing when loading a film cartridge II. Release sequence (shooting process for each frame) III. Forced rewinding process in the middle of film IV. Automatic rewind processing from the end of film Rewind write (magnetic rewrite) processing VI. Regarding each processing step of the multiple exposure processing, the driving can be performed only by controlling the rotation direction and the rotation amount of the motor 17 while detecting the rotation position of the one-turn cam gear 50. Hereinafter, the control method of each processing step will be described with reference to FIGS.
This will be described based on the flowchart shown in FIG. As described above, the normal rotation of the motor 17 refers to the rotation driving of the output shaft 17a in the counterclockwise direction as viewed from the bottom side of the camera (FIG.
5 to 9), the reverse means that the output shaft 17 is viewed from the same direction.
a indicates a clockwise rotation drive. Also, the expression of the driving direction of the one-rotation cam gear 50, the first and second clutch mechanisms, and the other gears is similarly based on the view from the bottom side of the camera (FIGS. 2, 5 to 9). In particular, for the one-rotation cam gear 50, clockwise rotation is called forward rotation, and counterclockwise rotation is called reverse rotation.

[I. Film thrust processing)
When the film cartridge 90 is not loaded in the film cartridge accommodating chamber 14, the film cartridge is stopped in a state where the previous film cartridge is rewound. Therefore, the first clutch mechanism is connected to the film feeding mechanism 18 and the second clutch mechanism is The mechanism is connected to the rewind side. That is, the first planetary gear 27
Meshes with the second sun gear 30 and the second planetary gear 32 meshes with the rewinding direction gear 34. In the rewind rotation position,
The locking lever cam 74 moves the locking lever 20 to the unlocking position, and the forcible lever cam 75 moves the forcing lever 76 to the forcing position. (FIG. 6)

Here, the open / close lid (not shown) is opened, and the film cartridge 90 is inserted into the film
And close the opening / closing lid. By this closing operation, the opening / closing lid is locked, and the light shielding door 95 of the film cartridge 90 is opened (step S1). When the opening / closing lid is locked, a lock signal is input to the control circuit 100 (S2), and upon receiving the signal, the motor 17 is driven to rotate in the reverse direction (S3). Since the reverse rotation of the motor 17 rotates the first sun gear 26 clockwise, the first clutch mechanism is kept connected to the film feed mechanism 18 side, and the rewind direction gear 3
4 is rotated clockwise, and the cartridge spool drive shaft 42 (the cartridge spool 9
2) is rotated counterclockwise. Since the rotation of the cartridge spool 92 is a rotation in the rewinding direction, the film F is not sent out from the film cartridge 90, and the cartridge spool 92 idles in the housing 91. During this time, the data reader 88 reads the information recorded on the data disk 99 which rotates integrally with the cartridge spool 92, and the number of films and the film sensitivity are input to the control circuit 100 (S4).

When the reading of the data disk 99 is completed, the motor 17 is stopped (S5), and then the motor 17 is driven forward (S6). The forward rotation drive of the motor 17 is a drive for moving the second clutch mechanism on the rewind side to the upper side. When the first sun gear 26 rotates counterclockwise in response to the normal rotation of the motor 17, the first planetary gear 27 revolves and meshes with the cam drive gear 29 (S7). As a result, the one-turn cam gear 50 rotates forward from the rewind rotation position (S8). By the forward rotation, the forcible lever cam 75 is separated from the engaging pin 77 and the forcible force of the forcible lever 76 is lost, so that the forcible lever 76 is moved to the non-forcible position by the restoring force of the torsion spring 46, and the second planetary gear 32 Is in a state capable of meshing with the hoisting direction gear 33. As a result, the second clutch mechanism can send out the film F. If it is detected that the switch contact piece 80a has come into contact with the brush 59 and the one-turn cam gear 50 has been rotated to the initial position (S
9) Stop the motor 17 (S10). In the initial position,
Since the locking lever cam 74 holds the locking lever 20 in the unlocked position, the first clutch mechanism is switchable. From step S8 to step S11, the one-rotation cam gear 50 performs the forward rotation indicated by the arrow A in FIG. 14, and during this time, the operation related to the mirror 70 and the shutter charge is not performed.

Subsequently, when the motor 17 is again rotated in reverse (S
11), the first clutch mechanism (the first planetary gear 27) switches the connection to the film feeding mechanism 18 (the second sun gear 30) side (S12), and the second planetary gear is rotated by the clockwise rotation of the second sun gear 30. The gear 32 meshes with the hoisting gear 33. That is, the second clutch mechanism is connected to the winding upper side (S13). Thereby, the winding spool 16 and the cartridge spool 9
2 and the two spools rotate clockwise to start feeding the film F. At the beginning of the feeding, the film F is loaded into the cartridge spool 92.
Is self-propelled toward the hoisting spool 16 only by the rotational force (S14). Then, when the leading end of the film F is wound around the winding spool 16, the winding is performed mainly by the winding force of the winding spool 16 having a high peripheral speed. When the feeding of the first frame is detected by the film feeding control sensor 86 (S1)
5), the reverse rotation drive of the motor 17 is stopped, and a photographing standby state is set (S16). At this time, since the one-rotation cam gear 50 is at the initial position, the mirror 70 is held at the observation position shown in FIG. 3, and the user can observe the subject from the finder.

[II. Release Sequence (Shooting Processing for Each Frame)] In the state where the cueing of the film is completed, the one-rotation cam gear 50 is connected to the initial position, the first clutch mechanism is connected to the film feeding mechanism 18 side, and the second clutch mechanism is connected to the winding upper side. are doing. Since the one-rotation cam gear 50 is at the initial position,
The locking lever 20 is in the unlocked position. Here, the multiple exposure operation switch 84 is turned on to perform multiple exposure shooting (S17). The sequence of the multiple exposure shooting will be described later. When the release switch 81 is turned on without selecting the multiple exposure in step S17 (S18), a normal release sequence is started. When the shutter release signal enters the control circuit 100, the shutter holding magnet 89 is first energized to hold the shutter (S19).
The motor 17 is driven to rotate forward (S20). The connection of the first clutch mechanism is switched from the film feeding mechanism 18 side to the mirror / shutter driving mechanism 19 side by the forward rotation of the motor 17 (S21), and the one-turn cam gear 50 is rotated forward from the initial position (S22). With this forward rotation, one-turn cam gear 5
When 0 reaches the hoisting rotation position (S23), the engagement between the locking lever cam 74 and the locking lever 20 is released, and the locking lever 20 is moved to the locked position by the urging force of the torsion spring 20c. One clutch mechanism is mirror / shutter drive mechanism 19
(S24).

When the normal rotation of the one-turn cam gear 50 is further continued, the follower pin 5 is inserted into the eccentric cam portion 54 of the cam groove 52.
6, the drive lever 55 is rotated clockwise. As a result, the charge lever 64 is pivoted upward from the position shown in FIG. 3 to the position shown in FIG. 4 via the first link 60 and the second link 62, and the mirror operating section 67 is moved to the mirror sheet 7
0a is pushed up and the mirror 70 is raised to the shooting position (S
25). Further, since the shutter charge protrusion 66 is also moving upward, the shutter charge is released (S2).
6). This enables exposure, and when an ON signal of the exposure rotation position switch (contact between the switch contact piece 80c and the brush 59) is input (S27), the motor 17 is stopped (S28). In step S28, the shutter is held only by the shutter holding magnet 89, and the mirror 70 is retracted from the imaging optical path 13. Here, the shutter holding magnet 89 is de-energized so that the film F is exposed so that the front curtain and the rear curtain of the shutter run at a predetermined time difference (S2).
9). Note that the one-turn cam gear 50 from step S22 to step S28 performs forward rotation indicated by an arrow B in FIG.

The control circuit 100 records the number-of-shots data read from the data disk 99 in step S4. After the exposure, if the exposure frame is the last frame of the film, an automatic rewinding process (FIG. 19) described later is started. If not, the film is wound up and the next frame is sent out (S3).
0). First, the motor 17 is used to lower the mirror 70.
Is reversed (S31). In the exposure rotation position, since the first clutch mechanism is connected and fixed to the mirror / shutter drive mechanism 19 by the locking lever 20, the reverse rotation of the motor 17 causes the one-rotation cam gear 50 to rotate in the reverse direction from the exposure rotation position (S32). . By this reverse rotation, the follower pin 56 is guided from the eccentric cam portion 54 to the concentric cam portion 53, the drive lever 55 rotates counterclockwise, and the charge lever 64 is moved through the first link 60 and the second link 62. It is pivoted downward from the position of FIG. 4 to the position of FIG. By the lowering operation of the charge lever 64, the push-up of the mirror operating section 67 is released, and the mirror 70 is lowered to the observation position by the urging force of the torsion spring 72 (S33). At the same time, the charge lever 64 rotates downward, and shutter charge is performed by the shutter charge protrusion 66 (S34).

When the one-rotation cam gear 50 reaches the winding rotation position (S35), the locking lever cam 74 engages with the locking lever 20, and the locking lever 20 is moved to the unlocked position again (S36). . As a result, the first planetary gear 27 that has become revolvable revolves in the direction of the second sun gear 30, and the first clutch mechanism is switched to the film feeding mechanism 18 (S3).
7). The one-rotation cam gear 50 from which the transmission of the driving force is interrupted stops at the winding rotation position. On the other hand, in the winding rotation position, the second
Since the clutch mechanism can be connected to the upper side of the winding, the motor 1
The winding spool 16 and the cartridge spool 92 are rotated in the clockwise direction (sending direction) by the film feeding mechanism 18 interlocked with the reverse rotation drive of 7, so that the film F is wound (S38). During this winding operation, the magnetic head 85 performs magnetic writing on the film F. The timing of starting magnetic writing is controlled by the control circuit 100 using the magnetic writing control sensor 87. Note that, from step S32 to step S35, the one-turn cam gear 50 is
, A reverse rotation indicated by an arrow C is performed. When the film feeding control sensor 86 detects that the winding of one frame has been completed (S39), the motor 17 is stopped to enter a standby state for the next release sequence (S40).

Here, the rewind write switch 83 is turned on (S41), and the rewind write process described later can be started. When the rewind switch 82 is turned on without the rewind light switch 83 being turned on (S42).
The process moves to the forced rewind process in the middle of the film. If neither switch is turned on, the process returns to step S17 and the photographing operation is repeated. However, from the second frame, step S2
The normal rotation of the single-rotation cam gear 50 from step 2 to step S28 is different from the above description in that it starts from the winding rotation position (arrow B 'in FIG. 14).

[III. Forced rewinding in the middle of film]
In the end state of the photographing sequence (S40), the one-rotation cam gear 50 is at the winding rotation position, the first clutch mechanism is connected to the film feeding mechanism 18, and the second clutch mechanism is connected to the winding upper side. Further, the locking lever 20 is at the locking releasing position. Here, when the forced rewind switch 82 is turned on (S42), the control circuit 100 energizes the shutter holding magnet 89 (S43), and then the motor 17 is rotated forward (S44). With the forward rotation of the motor 17, the first clutch mechanism is connected to the mirror / shutter drive mechanism 19 (S4).
5), One-turn cam gear 50 is rotated forward from the winding rotation position (S46). This forward rotation is for switching the second clutch mechanism to the rewind side. As described above, since the single-rotation cam gear 50 cannot rotate in the reverse direction from the winding rotation position, it is necessary to rotate the motor 17 forward to rotate the single-rotation cam gear 50 forward from the winding rotation position to the rewind rotation position. During this forward rotation, the one-turn cam 50 passes through the exposure rotation position, so that the mirror 70 moves up and down, and the shutter charge is released and recharged (S47 to S5).
2). The reason why the shutter is held in step S43 is to prevent the exposure of the film F without running the shutter even when the shutter charge is released (S49). When the one-turn cam gear 50 approaches the rewind rotation position, the locking lever 20 is engaged with the locking lever cam 74 and moves to the unlocking position (S52).

When the forward rotation of the one-rotation cam gear 50 continues and the forcible lever cam 75 is engaged with the engagement pin 77, the forcible lever 76 is moved to the forcible position, and the second clutch mechanism is connected to the rewind side (S53). . Therefore, the brush 59 and the contact piece 8
0b comes into contact and the rewind rotation position switch is turned on (S5
4) The energization of the shutter holding magnet 89 is released (S
55) The motor 17 is stopped to hold the second clutch mechanism on the rewind side (S56). The single-rotation cam gear 50 from step S46 to step S56 is rotating forward as indicated by arrow D in FIG.

Subsequently, the motor 17 is reversed (S57).
Since the lock lever 20 is at the lock release position, the revolution of the first planetary gear 27 is not restricted, and the first clutch mechanism is switched to the film feed mechanism 18 side (S58). Motor 1
When the reverse rotation of 7 is continued, the rewind gear 34 is rotated counterclockwise via the second planetary gear 32. Rewind direction gear 3
4 rotates the cartridge spool drive shaft 42 in the counterclockwise direction.
2, the film F is rewound (S59).
The hoisting spool 16 is not rotated in the rewinding direction by the one-way clutch provided in the rewinding direction gear 34. Therefore, the rewinding of the film F is performed only by the driving force of the cartridge spool driving shaft 42. During the rewinding operation, the control circuit 100 counts the number of rewinding frames, and when it is determined that all the frames have been rewound into the film cartridge 90 (S
60) After rotating the cartridge spool 92 to a predetermined rotation phase in order to make the rotation position indicating plate 96 face the exposure state indicating hole 94 indicating partial exposure (S61), the motor 17 is stopped (S62). After the motor 17 stops, the lid is unlocked and the film cartridge 90 is taken out of the film cartridge storage chamber 14. In the taken-out film cartridge 90, the exposure state can be visually confirmed through the exposure state display hole 94.

[IV. Automatic rewind processing from film end]
When the forced rewinding is not performed, if the exposure frame is the last frame in step S30 of the release sequence, as shown in FIG.
The automatic rewinding process shown in FIG. Since the winding operation is necessary for magnetic writing also in the case of the last frame, the motor 17 is rotated in the reverse direction (S63). Thereby, the one-turn cam gear 50
Is rotated backward from the exposure rotation position (S64), and the mirror 70 is rotated.
(S65, S6)
6). When the single rotation cam gear 50 reaches the winding rotation position (S
67), the lock lever 20 moves to the lock release position (S6).
8) The reverse driving force of the motor 17 is
(S69). Accordingly, the last frame is wound by the reverse rotation driving force of the motor 17, and magnetic writing is performed on the last frame by using the magnetic head 85 (S70). When the completion of winding of the last frame is detected by the film feeding control sensor 86 (S71), the motor 17 is stopped (S72).
Hereinafter, the process automatically enters step S43 of the forced rewinding shown in FIG. 18 and rewinding is performed. At this time, unlike the case of the forced rewind, the rotation stop position of the cartridge spool 92 in step S61 is controlled so that the rotation position display plate 96 corresponds to the exposure state display hole 94 indicating that the exposure has been completed.

[V. Rewind Write (Magnetic Information Re-Recording) Processing] In the end state of the above photographing sequence (S40), the one-turn cam gear 50 is at the winding rotation position,
The first clutch mechanism is connected to the film feeding mechanism 18, and the second clutch mechanism is connected to the winding upper side. Then, when the rewind write switch 83 is turned on in step S41, a rewind write process shown in FIGS. 20 and 21 is started. First, the shutter holding magnet 89 is energized to hold the shutter (S73), and then the motor 17 is driven to rotate forward (S74). This forward rotation drive is a preparation stage for rewinding the exposed photographic frame to the photographic position again, and the first clutch mechanism is driven by the mirror / shutter drive mechanism 19.
Side (S75), and the single-rotation cam gear 50 is rotated forward from the winding rotation position (S76). At this time, the one-turn cam gear 50 rotates in the direction of arrow D in FIG.
2, the mirror elevating operation and the like occur (S77 to S8).
2) However, since the shutter is held by the magnet 89, there is no overlapping exposure. When the forcible lever cam 75 is engaged with the engagement pin 77, the forcible lever 76 is moved to the forcible position, and the second clutch mechanism is switched to the rewind side (S83). When the rewind rotation position switch of the cam gear 50 is turned on (S84), the shutter holding magnet 89
(S85), the motor 17 is stopped, and the second
The clutch mechanism is held on the rewind side (S86). Next, when the motor 17 is reversed (S87), the one-rotation cam gear 5
Since the lock lever cam 74 of 0 holds the lock lever 20 at the lock release position, the first clutch mechanism is switched to the film feeding mechanism 18 side (S88). When the reverse rotation of the motor 17 is continued, the cartridge spool drive shaft 42 is rotated counterclockwise to rewind the film F (S8).
9). When the completion of rewinding of one frame is detected by the film feed control sensor 86 (S90), the motor 17 is turned off.
Is stopped (S91).

As a result, the magnetically written photographing frame returns to the photographing position behind the photographing optical path 13. Subsequently, as a preparation stage for sending the film F, the motor 17 is rotated forward (S
92), the first clutch mechanism is connected to the mirror / shutter drive mechanism 19 side (S93). When the forward rotation of the motor 17 is continued, the one-rotation cam gear 50 is rotated forward from the rewind rotation position (S94). With this forward rotation, the forced lever cam 75
The forcible lever 76 is returned to the non-forcible position. When the one-rotation cam gear 50 rotates forward, the rotation position detected after the rewind rotation position is the initial position. Therefore, when the brush 59 contacts the contact piece 80a (S95), the motor 17 is stopped (S96). . One-turn cam gear 5 from step S94 to step S96
The rotation of 0 is indicated by arrow A in FIG.

Next, when the motor 17 is reversed (S9).
7) Since the locking lever 20 is in the unlocking position, the first
The clutch mechanism is switched to the film feeding mechanism 18 (S98). The second clutch mechanism interlocked with the reverse rotation of the motor 17 is connected to the winding upper side (S99), and the winding spool 16
The film F is wound up by the cartridge spool drive shaft 42. During this winding operation, the magnetic head 85 rewrites the magnetic information (S100). Since the rewriting is completed during the winding of the frame, when the completion of winding of one frame is detected (S101), the motor 17 is stopped and the rewind write process ends (S102). Here, the forced rewind switch 82 can be turned on to enter the above-described forced rewind sequence (FIG. 18) (S10).
3). If the forced rewind is not performed, since the unexposed photographic frame is positioned behind the photographic optical path 13, the photographic sequence (S17-) of FIG. 17 can be started. However, as with the end of the film cueing (FIG. 16), the one-turn cam gear 50 is at the initial position at the end of the rewind write. Therefore, only when rewind light is performed,
Even after the second frame, the one-turn cam gear 50 enters the release sequence from the initial position (arrow B in FIG. 14, FIG. 1).
7). Also, in the forced rewind after the rewind write, the one-turn cam gear 50 is rotated from the initial position (arrow D 'in FIG. 14, FIG. 18).

[VI. Multiple Exposure Process] When the multiple exposure operation switch 84 is turned on at the beginning of the shooting sequence (S17), the multiple exposure process shown in FIG. 22 is executed.
When the release switch 81 is turned on after the multiple exposure switch 84 is turned on, the motor 17 is rotated forward and the one-rotation cam gear 50 is rotated forward in the same manner as in steps S18 to S40 in the release sequence to perform the exposure. Execute (S104 to S114). At this time,
Forward rotation of one-turn cam gear 50 (from S108 to S113)
Is the initial position to the exposure rotation position (arrow B in FIG. 14) after the first frame of the film or after the rewind write, and from the winding rotation position to the exposure rotation position (the arrow in FIG. B ′).

When the exposure is completed, the motor 17 is rotated in the reverse direction,
By the reverse rotation of the one-rotation cam gear 50, the lowering operation of the mirror 70 and the shutter charge are performed (S115 to S11).
8). In the case of the multiple exposure process, unlike the normal release sequence described above, when the single-rotation cam gear 50 reaches the multiple exposure rotation position, that is, when the brush 59
At the point of time when it comes into contact with 0d (S119), the operation differs depending on whether or not the multiple exposure for the shooting frame has been completed (S120). In the case of continuing the multiple exposure, since the winding of the film F is unnecessary, the motor 17 is stopped when the one-rotation cam gear 50 performs the reverse rotation of the arrow E in FIG. 14, that is, at the multiple exposure rotation position (S130). At this time, when the release switch 81 is turned on, the exposure operation starts again from step S104. Steps S104 to S120 can be repeated any number of times. However, after the second exposure, the single-rotation cam gear 50 is rotated forward from the multiple exposure rotation position (arrow G in FIG. 14), so that the locking lever 20 is at the locking position, and the operation in step S109 does not occur. .

On the other hand, when ending the multiple exposure, the reverse rotation of the motor 17 is not stopped by turning on the multiple exposure rotation position switch. If it is the last frame, the process proceeds to step S67 of the automatic rewinding process (FIG. 19). If not, the film F is wound up and the next frame is transmitted (S12).
1). When the single rotation cam gear 50 reaches the winding rotation position due to the reverse rotation of the motor 17 (S122), the locking lever 20 moves to the unlocking position (S123). One clutch mechanism is switched to the film feeding mechanism 18 side (S124). That is, the one-rotation cam gear 50 stops by performing the reverse rotation of the arrow C in FIG. 14, but the reverse rotation of the motor 17 is continued. Then, the film F is wound up by the reverse rotation and magnetic writing is performed (S125).
7 is stopped (S126, S127). Step S12
Since the state of each mechanism at 7 is the same as the end state of the release sequence (S40), if the rewind light switch 83 is turned on here, the rewind write processing of FIGS. 20 and 21 is started (S128), and the forced operation is performed. When the rewind switch 82 is turned on, the forced rewind process of FIG. 18 can be started (S129).

As described above, in the above embodiment, the motor 17
In the forward direction, the mirror is raised and the shutter charge is released, and in the reverse direction, the mirror is lowered, the shutter is charged, and the film is wound and rewound. Regarding the reverse rotation of the one-rotation cam gear 50 from the exposure rotation position, the rotation position (multiple exposure rotation position) between the time when the mirror 70 is lowered and the shutter charge is completed and the time when the locking lever 20 moves to the unlocking position. ) Is provided, and if the motor 17 is stopped when the single-rotation cam gear 50 reaches the multiple exposure rotation position after exposure, the film feeding operation does not occur, so that multiple exposure is possible. In the above embodiment, the on position of the multiple exposure rotation position switch is set between the exposure rotation position and the winding rotation position in order to enable quick exposure. If the motor is stopped before reaching the rotation position, the film is not fed, so that the ON position of the multiple exposure switch can be made to coincide with the winding rotation position described above.

Although the above embodiment relates to a single-lens reflex camera compatible with the new photo system, the initial thrust at the time of loading a cartridge (FIG.
Except for the processing sequence of 6) and the rewind light (FIGS. 20 and 21), the present invention does not change the configuration to 135 mm.
Applicable to format cameras. More specifically
In the case of the 135 mm format, magnetic writing (step S3
8, S100) and the operation related to the control of the parking position of the cartridge spool 92 (step S61) are not required, and the control is omitted.

In the present invention, forms different from the above are possible. For example, in the above-described embodiment, the single-rotation cam gear 50 cannot rotate in the reverse direction from the winding rotation position. Therefore, during the rewinding operation, the single-rotation cam gear 50 once passes through the exposure rotation position from the winding rotation position to the rewind rotation position. Had to be rotated. That is, when the film is rewound, the mirror 70 moves up and down and the shutter charge is released. To avoid this, the locking lever 20
May be moved to the locked position and the unlocked position using an electromagnet without being linked to the one-rotation cam gear 50. In this case, when the one-rotation cam gear 50 is at the winding rotation position or the initial position, the locking lever 20 can be moved to the locking position, and the one-rotation cam gear 50 can be reversely rotated to the rewind rotation position. Therefore, the film rewinding can be performed without causing the operation of the mirror / shutter system and earlier in time. Similarly, at the time of the rewind light, the locking lever 20 is moved to the locking position at the initial position of the one-rotation cam gear 50, and the one-rotation cam gear 50 is rotated to the rewind rotation position without passing through the exposure position, and the mirror / shutter is rotated. Unnecessary operation of the system can be eliminated.

[0059]

As described above, according to the present invention, a single-lens reflex camera for driving a mirror / shutter drive system and a film feeding system with one motor, and a motor-driven single-lens reflex camera capable of multiple exposure, has a simple mechanism. Can be provided.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing the internal configuration of a motor-driven single-lens reflex camera to which the present invention is applied.

FIG. 2 is a diagram showing a driving mechanism of the camera of FIG. 1 as viewed from a bottom surface side.

FIG. 3 is a side view showing a mirror / shutter driving mechanism in a mirror lowered state from a camera side direction.

FIG. 4 is a side view showing a mirror-up state of the mirror / shutter driving mechanism of FIG. 3;

FIG. 5 is a bottom view of a main part of the film feeding mechanism when the one-rotation cam gear is in an initial position and the clutch mechanism is in a film winding state.

FIG. 6 is a bottom view of the main part of the film feeding mechanism when the one-rotation cam gear is in the rewind rotation position and the clutch mechanism is in the film rewinding state.

FIG. 7 is a bottom view of the main part of the film feeding mechanism when the one rotation cam gear is in the exposure rotation position and the clutch mechanism is connected to the mirror / shutter drive system.

FIG. 8 is a bottom view of the main part of the film feeding mechanism when the one-rotation cam gear is at the winding rotation position and the clutch mechanism is in the film winding state.

FIG. 9 is a bottom view of the main part of the film feeding mechanism when the one-rotation cam gear is in the multiple exposure rotation position and the clutch mechanism is in the film winding state.

FIG. 10 is a diagram illustrating a contact state between the brush and the switch board when the one-rotation cam gear is at an initial position, as viewed from the camera bottom side.

FIG. 11 is a diagram illustrating a contact state between the brush and the switch substrate when the one-rotation cam gear is at the rewind rotation position, as viewed from the bottom of the camera.

FIG. 12 is a diagram illustrating a contact state between the brush and the switch substrate when the one-rotation cam gear is at the exposure rotation position, as viewed from the bottom side of the camera.

FIG. 13 is a diagram illustrating a contact state between the brush and the switch substrate when the one-rotation cam gear is at a multiple exposure rotation position, as viewed from the bottom side of the camera.

FIG. 14 is a timing chart showing the rotation of the one-turn cam gear and the control state of each mechanism.

FIG. 15 is a block diagram illustrating an electric circuit of the camera.

FIG. 16 is a flowchart illustrating a film thrust (starting) process.

FIG. 17 is a flowchart illustrating a release sequence.

FIG. 18 is a flowchart illustrating a forced rewind process in the middle of a film.

FIG. 19 is a flowchart illustrating an automatic rewind process from the last frame.

FIG. 20 is a flowchart illustrating a rewind write process.

FIG. 21 is a flowchart illustrating the continuation of the rewind write process in FIG. 20;

FIG. 22 is a flowchart illustrating a multiple exposure process.

FIG. 23 is a perspective view showing a self-propelled film cartridge from one end surface side.

24 is a perspective view showing the film cartridge of FIG. 23 from the other end surface side.

[Explanation of symbols]

 Reference Signs List 11 camera body 14 film cartridge storage chamber 16 winding spool 17 motor 18 film feeding mechanism 19 mirror / shutter drive mechanism 20 locking lever 26 first sun gear 27 first planetary gear 28 31 revolution support arm 29 cam drive gear 30 first 2 sun gear 32 second planetary gear 33 hoisting direction gear 34 rewinding direction gear (one-way clutch gear) 38 hoisting spool drive gear 40 reduction gear train 41 cartridge spool drive gear 42 drive shaft 50 one rotation cam gear 52 cam groove 55 drive Lever 59 Brush 64 Charge lever 70 Mirror 74 Locking lever cam 75 Forced lever cam 76 Forced lever 80 Switch board 85 Magnetic head 90 Film cartridge 92 Cartridge spool 100 Control circuit

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03B 17/00 G03B 19/12

Claims (2)

(57) [Claims] 1. A motor-driven single-lens reflex camera for controlling the raising and lowering of a mirror and a shutter charge by a mirror / shutter drive system and winding and rewinding a film by a film feed system by rotating one motor in forward and reverse directions. And a locking lever movable between a clutch fixing position and a clutch switching allowable position, and when the locking lever is at the clutch fixing position, a forward / reverse driving force of the motor in accordance with forward / reverse rotation of the motor. Is transmitted to the mirror / shutter drive system, and when the locking lever is at the clutch switching allowable position, the motor is switched between the mirror / shutter drive system and the film feed system in accordance with the forward / reverse rotation of the motor to interlock with the first system. And a forcing lever movable between a winding position and a rewinding position, and the motor is linked to the film feeding system by the first clutch means. In the state, in conjunction with the motor in the hoisting system when this force lever is on the winding position,
Second clutch means for switching the motor to the rewinding system when in the rewinding position; interlocking; rotating the motor by the first clutch means when the motor is interlocked with the mirror / shutter driving system; A one-rotation cam for holding the lowering state of the mirror and the shutter charging state at the position and for raising the mirror and releasing the shutter charge at an exposure rotation position different from the charging position; In the rewind rotation position in the rotation position in the opposite direction to the exposure rotation position with the center as the center,
A forcible lever cam for forcibly moving the forcible lever from a winding position to a rewind position; and a forcible lever provided for the one-rotation cam, wherein the locking lever is moved to a clutch fixing position when the one-rotation cam is at the exposure rotation position, and a charging position. And a locking lever cam for moving the locking lever to the clutch switching allowable position when in the rewind rotation position. In the release sequence, the motor is rotated forward to rotate the one-rotation cam from the charge position to the exposure rotation position. After the exposure, the motor is rotated in the reverse direction to rotate the one-turn cam in the reverse direction from the exposure rotation position to the charge position to lower the mirror and charge the shutter, and then reverse the motor to wind up the film. After at least one exposure, the motor is reversed and the motor is stopped after the mirror is lowered and the shutter is charged. Motor driven single-lens reflex camera according to claim Rukoto. 2. The motor-driven single-lens reflex camera according to claim 1, wherein when the single rotation cam is rotated in reverse from the exposure rotation position, the locking lever moves to the clutch switching allowable position when the mirror is lowered and the shutter is charged. Completed before
Motor-driven single-lens reflex camera that stops the motor before the locking lever moves to the clutch switching allowable position during multiple exposure.