JP3431451B2 - Motor-driven single-lens reflex camera and motor-driven single-lens reflex camera for self-propelled film cartridge - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD 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, and a motor-driven single-lens reflex camera using a self-propelled film cartridge.

[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 up / down of a mirror and shutter charge, and a film feeding system for film winding and If a motor for rewinding is provided separately, the film feeding (frame speed) after exposure can be made faster, but it is difficult to downsize the camera and the cost tends to increase due to the installation space of the motor. It was Therefore, in order to save space in the camera and reduce the cost by driving both the mirror / shutter drive system and the film feeding system with one motor, a so-called single-motor type single-lens reflex camera has been proposed. . This includes, for example, a type in which the film is fed with a sprocket that can be wound at a constant angle, and Japanese Patent Laid-Open No. 1-202731.
8-10313), there is a type that feeds film by spool drive. However, in any case, there is a drawback that the power transmission system for making one motor perform a plurality of jobs becomes complicated.

In Japanese Patent Laid-Open No. 1-202731, the motor is rotated in one direction (normal rotation) to move the mirror up and down and the shutter is charged, and the motor is rotated in the opposite direction (reverse rotation) to wind and rewind the film. Is being done. With this configuration, in the release sequence, the motor is stopped after the operation of the mirror / shutter system, and then the motor is reversely rotated to wind up the film, which delays frame feeding after exposure, which is disadvantageous for continuous shooting.

Furthermore, a new photographic system (ADVANCED PHOTO SYSTE) using a self-propelled film cartridge is used.
For M) compatible cameras, conventional formats (35 mm format ) such as film thrust (cue) and rewind light (magnetic rewriting) when the cartridge is loaded
Because of the operation is not in the camera etc.) in the single-lens reflex camera of the conventional 1-motor system, it is difficult to control while eliminating the above problems.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a single-lens reflex camera in which a mirror / shutter drive system and a film feeding system are driven by a single motor is constituted by a simple mechanism. The purpose is to reduce the size and cost. Another object of the present invention is to obtain a single-motor reflex single-lens reflex camera in which film feed is faster than before. It is another object of the present invention to provide a single-lens reflex camera for a self-propelled film cartridge of a one-motor drive type that enables rewriting of magnetic recording with a simple structure.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a motor for performing mirror up / down control and shutter charging by a mirror / shutter drive system, and film winding and rewinding by a film feeding system by rotating one motor in forward and reverse directions. to drive a single-lens reflex camera
There are performed to release the lifting operation and shutter charge mirror in rotation in the forward direction of the motor, the downward movement of the mirror reverse rotation of the motor and shutter charge, and the winding and rewinding of the film by the row Ukoto, shifts from the set color lowering and shutter charge, such that stopping or reversing the drive motor to the film winding has been made based on the idea of quickly feeding the film after exposure.

That is, the motor-driven single-lens reflex camera of the present invention has a locking lever that is movable between a clutch fixing position and a clutch switching allowable position. When the locking lever is in the clutch fixing position, the motor rotates in the forward and reverse directions. In response to the forward / reverse direction of the motor, the drive force is transmitted to the mirror / shutter drive system. First clutch means for switching and interlocking with the film feeding system; having a compulsory lever movable to a winding position and a rewinding position, and a motor interlocking with the film feeding system by the first clutch means. When the forced lever is in the hoisting position, the motor is interlocked with the hoisting system, and when it is in the rewinding position, the motor is switched to the rewinding system and interlocked. Clutch means for rotating the motor by the first clutch means when the rotation of the motor is interlocked with the mirror / shutter drive system, and holds the lowered state of the mirror and the shutter charged state at the charge position. One-rotation cam for raising the mirror and releasing shutter charge at different exposure rotation positions; rewinding rotation provided in this one-rotation cam in a rotation position opposite to the exposure rotation position about the charge position. A forced lever cam for forcibly moving the forcible lever from the hoisting position to the rewinding position at the position; the locking lever is moved to the clutch fixing position at the exposure rotation position of one rotation cam, and the charging position and the rewinding rotation position in a locking lever moving means for moving the clutch switching allowable position; Contact comprise
In the release 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 in reverse to rotate the one-rotation cam reversely from the exposure rotation position to the charge position. The mirror is lowered and the shutter is charged, and the film is wound by reversing the motor .

The locking lever moving means includes a spring member for urging the locking lever to a clutch fixing position; and is provided on the one-rotation cam, and is engaged at the charging position and the rewinding rotation position of the one-rotation cam. A locking lever cam for forcibly moving the stop lever from the clutch fixed position to the clutch switching allowable position is simple in structure. In this case, since the movement of the locking lever depends on the position of the one-turn cam, for example, the one-turn cam cannot rotate backward from the charge position to the rewinding rotation position. Therefore, an electromagnet for holding the shutter is provided, and when the film is rewound, the travel of the shutter is restricted by the attracting force of the electromagnet, and then the motor is normally rotated to rotate the single rotation cam from the charge position to the rewind rotation position. Let At this time, since the one-rotation cam passes through the exposure rotation position, the operation of the mirror / shutter system occurs, but the shutter holding electromagnet prevents the shutter from traveling and the exposure of the film can be prevented.

In order to eliminate such operation of the mirror / shutter system, the locking lever moving means moves the locking lever between the clutch fixing position and the clutch switching allowable position without depending on the rotational force of the one-rotation cam. It may be provided with an electromagnet.
In this case, at the time of film rewinding, the locking lever is moved to the clutch fixed position at the charge position of the one-rotation cam, and then the motor is rotated in the reverse direction to reversely rotate the one-rotation cam from the charge position to the rewinding rotation position.

In the above motor driven single-lens reflex camera, it is preferable that the first and second clutch means are composed of a planetary gear mechanism.

The present invention also uses a self-propelled film cartridge to control the mirror up and down by a mirror / shutter drive system and shutter charging, and the film winding and rewinding by a film feeding system as one motor. The present invention relates to a motor-driven single-lens reflex camera that rotates in forward and reverse directions.
This motor-driven single-lens reflex camera for a self-propelled film cartridge has a locking lever that is movable between a clutch fixed position and a clutch switching allowable position. When the locking lever is in the clutch fixed position, the motor rotates in the forward and reverse directions. In response to the forward / reverse direction of the motor, the drive force is transmitted to the mirror / shutter drive system. First clutch means for switching and interlocking with the film feeding system; having a compulsory lever movable to a winding position and a rewinding position, and a motor interlocking with the film feeding system by the first clutch means. When the forced lever is in the hoisting position, the motor is interlocked with the hoisting system, and when it is in the rewinding position, the motor is switched to the rewinding system and interlocked. Second clutch means for rotating the motor by the first clutch means when the rotation of the motor is interlocked with the mirror / shutter drive system, and holds the lowered state of the mirror and the shutter charged state at the charge position, One rotation cam that raises the mirror and releases the shutter charge at an exposure rotation position different from the charge position;
A forced lever cam that is provided on the one-rotation cam and that forcibly moves the forced lever from the winding position to the rewinding position at the rewinding rotation position that is in a rotation position opposite to the exposure rotation position around the charge position. Locking lever moving means for moving the locking lever to the clutch fixed position at the exposure rotation position of the one-rotation cam, and to the clutch switching allowable position at the charging position and the rewinding rotation position;
In the release sequence, the motor is rotated in the forward direction to normally rotate the one-rotation cam from the charge position to the exposure rotation position for exposure, and then the motor is rotated in the reverse direction to reversely rotate the one-rotation cam from the exposure rotation position to the charge position. Then, the mirror is lowered and the shutter is charged, and the film is wound by rotating the motor in the reverse direction.When the film is cued, the motor is rotated in the normal direction and the one-rotation cam is held at the charge position, and then the motor is rotated in the reverse direction. Characterize.

In this self-propelled film cartridge camera, the magnetic layer of the film is provided with a magnetic head for magnetic recording, so that rewriting (rewind write) of magnetic recording can be performed. For example, the locking lever moving means is provided on the spring member for urging the locking lever to the clutch fixing position, and on the one-rotation cam, the locking lever is provided at the charging position and the rewinding rotation position of the one-rotation cam. Is provided with a locking lever cam for forcibly moving from the clutch fixed position to the clutch switching allowable position. When rewriting magnetic recording, the motor is rotated in the forward direction to rotate the single-revolution cam forward from the charge position to the rewinding rotation position, and then the motor is rotated in the reverse direction to rewind the motor. After holding the one-revolution cam at the charge position, the motor is rotated in the reverse direction to perform hoisting. Rewriting is executed at the time of this winding.

Further, the locking lever moving means may be an electromagnet which moves the locking lever between the clutch fixing position and the clutch switching allowable position without depending on the rotational force of the one-rotation cam. In this case, when rewriting the magnetic recording, the locking lever is moved to the clutch fixed position, the motor is rotated in the reverse direction, and the one-rotation cam is reversely rotated from the charging position to the rewinding rotation position, and the engagement is performed at the rewinding rotation position. The stop lever is moved to the clutch switching permissible position to further rewind by reversing the motor, and after rewinding, the motor is normally rotated to hold the one-rotation cam at the charge position, and then rewinding is performed by reversing the motor. That is, at the time of rewind writing, the one-rotation cam does not pass through the exposure rotation position, so that the mirror / shutter system does not operate.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on an embodiment applied to a single-lens reflex camera compatible with a new photographic system. First, a self-propelled film cartridge will be briefly described with reference to FIGS. The film cartridge 90 has a film F on a cartridge spool 92 rotatably housed in a cylindrical housing 91.
Is wound. Two perforations P are formed on the film F for each photographing frame. 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 advancing / retreating port 95 that is vertically long in the axial direction is formed, and a light shielding door 97 that opens and closes the film advancing / retreating port 95 is provided. The light blocking door 97 is
It is rotatably supported in the housing 91, and the film advancing / retreating port 95 is opened and closed by the rotation. In addition, the end surface of the housing 91 is cut out so that the data disk 99 is partially exposed. The data disk 99 is rotated integrally with the cartridge spool 92, and the number of images taken of the film F and the film sensitivity are displayed as a bar code on the surface thereof.

On the other hand, as shown in FIG. 22, the housing 9
Four exposure state display holes 94 are formed in the other end surface of 1. Each hole has its own shape so as to correspond to the unexposed state, partial exposure (when the film is rewound midway without shooting to the last frame), exposed (exposure to the last frame), and developed. Different. At the end of the cartridge spool 92 opposite to the bearing hole 93, a rotation position indicating plate 96 is provided.
Is protruding in the radial direction. The rotation stop position of the cartridge spool 92 is controlled to control the four exposure state display holes 9
The exposure state of the film cartridge 90 can be visually detected by exposing the rotation position display plate 96 to any one of the positions 4.

FIG. 1 is a schematic front view of the internal structure of a single lens reflex camera using a film cartridge 90. A shooting lens 12 that is detachable from the camera body 11 is attached to a substantially central portion of a horizontally long camera body 11. A tubular film cartridge storage chamber is provided on the right side of the drawing with a shooting optical path 13 behind the shooting lens 12 interposed therebetween. Similarly, a cylindrical winding spool chamber 15 is disposed on the left and 14 sides. A cartridge spool drive shaft 42 projects axially from the one end surface 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 the driving force to the cartridge spool 92 without rotating relative to each other. The camera body 11 is provided with a cartridge insertion hole (not shown) that communicates 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 arranged in the hoisting spool chamber 15, and a motor 17 as a drive source for the whole camera is installed in the hollow shaft portion of the hoisting spool 16. The motor 17 projects an output shaft 17a toward the bottom surface 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 the motor 17.
The gear train connected from a to the winding spool 16 and the gear train connected from the output shaft 17a to the lower part of the film cartridge storage chamber 14 through the lower part of the photographing optical path 13 to the cartridge spool drive shaft 42. There is. 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 drive mechanism 19 shown from the bottom side of the camera.
Is part of. The pinion 21 provided at the end of the output shaft 17a of the motor 17 meshes with the large diameter gear of the 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. In each of the two-stage gears, a small-diameter gear meshes 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 portion of the revolution support arm 28. A first member is provided near the tip of the revolution 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 revolution support arm 28 revolves in the same direction as the rotation direction along the peripheral surface of the first sun gear 26, and when the revolution is restricted, It rotates in the opposite direction to the rotation of the first sun gear 26 at the regulated position.

The first planetary gear 27 meshes with either the cam drive gear 29 axially supported on the front side or the second sun gear 30 axially supported on the rear side in the camera body by the revolution. At the time of meshing, the revolution of the first planetary gear 27 is restricted, and the rotational force 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 becomes the cam drive gear. It revolves in the direction of meshing 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 the direction in which it 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 the film feeding mechanism 18.
When the first planetary gear 27 revolves, either the film feeding mechanism 18 or the mirror / shutter drive mechanism 19 is interlocked with the motor 17. Therefore, the planetary gear mechanism including the first sun gear 26, the first planetary gear 27, and the revolution support arm 28 is
A first clutch mechanism that switches the interlocking direction to the mirror / shutter system or the film feeding system in accordance with the forward and reverse rotation of 7 is configured.

The first clutch mechanism is provided with a locking lever 20. The locking lever 20 is the stopper 2
0a and a short side having a cam engaging arm 20b are formed in an L shape, and the bent portion is pivotally supported in the camera body 11. The stopper portion 20a extends in the direction of the revolution support arm 28, and when the locking lever 20 swings while the first planetary gear 27 meshes with the cam drive gear 29, the stopper portion 20a revolves. It disengages from the tip of the support arm 28. Stopper part 20a
When the orbital support arm 28 is engaged, the first planetary gear 27
The revolution of is regulated. That is, the switching operation of the first clutch mechanism is restricted (FIG. 7). This is called the locking position of the locking lever 20 (clutch fixed position). When the locking lever 20 is rotated clockwise from the clutch fixed position, the stopper portion 20a moves and the locking is released (FIGS. 5, 6, and 8). This is called a lock release position (clutch switching allowable position) of the lock lever 20. Therefore, when the locking lever 20 is in the unlocked position, the first clutch mechanism applies a driving force to either the film feeding mechanism 18 or the mirror / shutter driving mechanism 19 in accordance with the forward and reverse rotations of the motor 17. When the lock lever 20 is in the lock position, the cam drive gear 29 is rotated in the normal and reverse directions according to the forward and reverse rotation of the motor 17. The locking lever 20 is biased to the locking position by a torsion spring 20c.

Of the drive mechanisms whose interlocking with the motor 17 is controlled by the first clutch mechanism, first, the film feeding mechanism 1
8 will be described. The second sun gear 30 is the camera body 1
The shaft is rotatably supported by a fixed shaft in the shaft 1, and the fixed shaft further rotatably supports the base end portion of the revolution support arm 31. The revolution support arm 31 pivotally supports a second planet gear 32 on the tip side, and the second planet gear 32 meshes with the second sun gear 30. As a result, when the second sun gear 30 rotates in the forward and reverse directions, the second planet gear 32 revolves along the circumferential 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 either 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 these, the revolution is restricted and the driving force of the motor 17 is transmitted. To do.

The hoisting direction gear 33 and the rewinding direction gear 34 are both two-stage gears, and the small diameter gear 3 of the hoisting direction gear 33 is used.
The idle gear 35 meshes with the 3b, and the rewinding direction gear 34
An idle gear 36 meshes with the large-diameter gear 34a, and the idle gears 35, 36 mesh with each other. Since the two gears are sandwiched, the winding direction gear 33 and the rewinding direction gear 34 rotate in opposite directions. 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 to interlock with it, and does not transmit the rotation of the small diameter gear 34b to the large diameter gear 34a. It is a one-way clutch. Therefore, when the second planetary gear 32 meshes with the rewinding direction gear 34, the hoisting direction gear 3
3 is not driven.

The small diameter gear 33b of the hoisting direction gear 33 includes:
In addition to the idle gear 35, a relay gear 37 meshes,
The relay gear 37 meshes with the winding spool drive gear 38. The hoisting spool drive gear 38 is the hoisting spool 1
The gear 6 is fixed to the peripheral surface of 6 to rotate the same. On the other hand, the transmission gear 4 is attached to the small diameter gear 34b of the rewinding direction gear 34.
0a is engaged. From the transmission gear 40a to the transmission gear 40j, ten gears 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 that is formed coaxially with the cartridge spool drive shaft 42 that projects 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
Since the large-diameter gear 34a is rotated in the counterclockwise direction in FIG. 2, the one-way clutch is connected, and the cartridge spool drive shaft 42 rotates together with the hoisting spool 16 in the clockwise direction in FIG. By 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 rewinding 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 winding direction gear 33 to the winding spool drive gear 38 form a gear train exclusively for film winding, and the rewinding direction gear 34 to the cartridge spool drive gear 41 are in both film feeding and rewinding directions. It constitutes a gear train that operates in. The gears that make up these gear trains are all single-stage or two-stage spur gears, and their rotation axes are substantially parallel.

In the film winding operation, the gear ratio is set so that the winding spool 16 rotates faster than the cartridge spool drive shaft 42. Therefore, when the film F delivered from the cartridge spool 92 is wound around the winding spool 16, the rotating force of the winding spool 16 is mainly used for winding. At this time, the one-way clutch of the rewinding direction gear 34 is a slip clutch capable of a certain slip when the clutch is engaged so that excessive tension does not act on the film F due to the peripheral speed ratio of both spools.

As described above, the planetary gear mechanism including the second sun gear 30, the revolution support arm 31, and the second planetary gear 32 is
In the film feeding mechanism 18, a second clutch mechanism that changes the feeding direction of the film F is configured. The second clutch mechanism includes a torsion spring 46 that is hooked on the revolution support arm 31, and a spring end portion 46a of the torsion spring 46 extends inward of the camera.

The second clutch mechanism includes a force lever 76 pivotally supported in the camera body 11. The force lever 76 has a pair of engagement pins 77 at one end centered on the support shaft and an operation pin 78 at the other end. The operation pin 78 is located near the spring end portion 46 a of the torsion spring 46. Has been extended to. The operation pin 78 is engaged with and disengaged from the spring end portion 46a by the swing of the force lever 76, and the torsion spring 46 (spring end portion 46a) is pushed by the rotation of the force lever 76 in the direction in which the engagement occurs. When the spring end portion 46a is pushed in, the revolution support arm 31 is rotated counterclockwise in FIG. 2, and the second planetary gear 32 revolves to rewind the direction gear 34.
It meshes with (small diameter gear 34b). When the operation pin 78 does not engage with the spring end portion 46a, the force lever 76 moves to the second position.
Without operating the clutch mechanism, the second clutch mechanism
The rotation of the sun gear 30 in the clockwise direction causes the second planet gear 32 to rotate.
Is capable of being connected to the hoisting direction gear 33. That is, the compulsory lever 76 allows the second clutch mechanism to be connected to the winding side in a non-compulsory position (see FIGS. 5 and 7).
8) and a forced position (FIG. 6) for pressing the spring end portion 46a to forcibly connect the second clutch mechanism to the rewinding side.

Next, the mirror / shutter drive mechanism 19 will be described. Inside the camera body 11, a one-rotation cam gear 50 that rotates in a plane parallel to each gear of the film feeding mechanism 18 is pivotally supported. A peripheral surface gear 51 is formed on the one-rotation cam gear 50, and the cam drive gear 29 is meshed with the peripheral surface gear 51. A cam groove 52 is formed on the back surface of the one-rotation cam gear 50 in FIG.
Are formed. The cam groove 52 is formed by the one-turn cam gear 50.
It is composed of an arc-shaped concentric cam portion 53 centered on the support shaft and an eccentric cam portion 54.

The drive lever 5 is coaxial with the cam drive gear 29.
One end of 5 is rotatably supported. The drive lever 55 extending in the longitudinal direction of the camera body 11 has a follower pin 56 protruding in the middle thereof fitted into the cam groove 52, and has a pair of holding pins 5 at the tip end thereof directed upward from the camera.
7 is projected. 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 reciprocally rotates about the support shaft with a constant width.
At this time, the positions of the pair of holding pins 57 are changed 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 provided.
Is positioned in front of the camera (FIGS. 3, 5, 6, and 8) and the follower pin 56 is guided by the eccentric cam portion 54, the rotation of the holding pin 57 to the rear of the camera is rotated by the drive lever 55. (FIGS. 4 and 7).

3 and 4 show the operating state of the mirror / shutter drive mechanism 19 from the side of the camera. Inside the camera body 11, above the drive lever 55, a support shaft 60x whose axis is orthogonal to the plane including the photographing optical axis of the camera is provided, and the intermediate portion of the first link 60 can be rotated. It is supported. At the lower end of the first link 60, a driven pin 61 that 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 reciprocally rotated in the front-rear direction of the camera, the link 60 is driven and swings. 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 around 4x. At the tip of the charge lever 64 opposite to the support shaft 64x, the shutter charge projection 6
6 and a mirror operating portion 67 are formed. First link 6
When the second link 62 swings following 0, the charge lever 64 also rotates around the support shaft 64x to form a four-bar linkage mechanism. By this link mechanism, the shutter charge protrusion 66 and the end portion on the mirror operating portion 67 side 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 is rotated downward from the position shown in FIG. 4 to the position shown in FIG. At this 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, which can be electromagnetically held by energizing a shutter holding magnet 89 (FIG. 14) composed of two shutters, one for the front curtain and the other for the rear curtain. When the charge lever 64 moves to the raised position in FIG. 4 with the magnet 89 energized, the mechanical holding is released. If the magnet 89 is de-energized, the shutter runs.

Further, inside the camera body 11, there is provided a support shaft 70x having an axis line which is substantially orthogonal to the plane including the photographing optical axis.
Is provided, and the mirror 70 is pivotally supported on this. The mirror 70 can be rotated around a support shaft 70x to move up and down between an observation position that advances into the photographing optical path 13 and a photographing position that retracts from the photographing optical path 13. At the observation position, the mirror 70 is located on the photographing optical axis of the camera, and the photographing lens 1
The image incident on 2 can be observed from a viewfinder (not shown) through an observation optical system including the mirror 70. On the other hand, at the photographing position, since the mirror 70 is retracted from the position on the optical axis, the film F can be exposed by running the shutter.
A spring hooking pin 71 is provided on the side surface of the mirror sheet 70a, and both ends of the torsion spring 72 are hooked on the spring hooking pin 71 and the spring hooking protrusion 68 provided on the charge lever 64.

Mirror operation portion 6 of the charge lever 64
7 is at a position where it can be engaged with and disengaged from the mirror sheet 70a, and when the charge lever 64 is rotated upward from the position shown in FIG. 3 to the position shown in FIG. 4, the mirror operation unit 67 takes an image of the mirror 70 against the torsion spring 72. Push it up to the possible position. At this time, the torsion spring 72 is bent by a certain amount, and the force for urging the mirror 70 in the descending direction is charged. Charge lever 6
When 4 is rotated downward from the position shown in FIG. 4 to the position shown in FIG. 3, the pushing up of the mirror operating portion 67 is released, and accordingly, the mirror 70 is lowered to the observation position by the biasing force of the torsion spring 72. With the above configuration, the mirror / shutter drive mechanism 19 interlocks the rotation of the one-rotation cam gear 50 with the mirror ascending / descending 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 descending. Also, when the follower pin 56 is in the shutter charge state and is guided by the eccentric cam portion 54, the mirror is raised and the shutter charge is released.

The one-turn cam gear 50 is further provided with a locking lever cam 74 fixed on the same surface as the cam groove 52, and a forced lever cam 75 is fixed on the opposite surface (paper surface side in FIG. 2, camera bottom surface side). It is set up. Locking lever cam 74
Is at a position where it is engaged with and disengaged from the cam engaging arm 20b of the locking lever 20 by the rotation of the one-rotation cam gear 50, and when the engagement occurs, the cam engaging arm 20b is pushed in and the torsion spring 20c is engaged. It is a cam that moves the locking lever 20 to the locking release position against it. The locking lever cam 74 is formed in a long arc shape. The compulsory lever cam 75 rotates the one-rotation cam gear 50 to engage the engaging pin 77 of the compulsory lever 76.
When the engagement is generated, the engagement pin 7
It is a cam that pushes 7 to move the force lever 76 to the force position. The compulsory lever cam 75 is located on the back surface side of the locking lever cam 74 and is formed in an arc shape shorter than the locking lever cam 74.

The one-rotation cam gear 50, which controls the raising and lowering of the mirror and the shutter charge by the two cams, controls the switching between the first clutch and the second clutch mechanism at a predetermined rotation position. Particularly, if the first clutch mechanism is controlled via the locking lever 20, the rotation direction of the one-rotation 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 locking position, the first clutch mechanism is a mirror / mirror.
Since the shutter drive mechanism 19 is fixed, the output shaft 17
When the motor 17 is driven so that a rotates counterclockwise in FIG. 2 (hereinafter, this driving direction is referred to as normal rotation of the motor 17), the one-rotation cam gear 50 is rotated clockwise (hereinafter, positive rotation). When the motor 17 is driven so that the output shaft 17a rotates clockwise (hereinafter referred to as the reverse rotation of the motor 17), the one-rotation cam gear 50 rotates counterclockwise (hereinafter referred to as reverse rotation). . On the other hand, the locking lever cam 7
When the engaging lever 4 is engaged with the cam engaging arm 20b and the engaging lever 20 is moved to the engaging release position, the single rotation cam gear 50 is likewise normally rotated in the forward rotation drive of the motor 17, but the motor 17
In the reverse rotation, the first planetary gear 27 revolves to the second sun gear 30 side, so the one-rotation cam gear 50 does not rotate in the reverse direction. That is, as indicated by the thick arrow in FIG. 13, the forward rotation of the motor 17 can rotate the single-rotation cam gear 50 forward regardless of the position of the locking lever 20, but the reverse rotation of the motor 17 causes the locking to occur. The one-turn cam gear 50 can be rotated in the reverse direction only when the lever 20 is in the locking position.

The one-rotation cam gear 50 is provided with a brush 59 which is integrally rotated. On the other hand, the camera body 11
Switch contact pieces 80a, 8 slidably contacting the brush 59 are provided inside.
A switch board 80 having 0b, 80c and a land contact piece 80d is arranged (FIGS. 9 to 12). Brush 5
The inner contact piece of land 9 and the land contact piece 80d are always in contact with each other. When the outer contact piece of the brush 59 comes into contact with any of the switch contact pieces 80a to 80c by the rotation of the one-rotation cam gear 50, the control circuit of the camera. Energize with 100. That is, the switch substrate 80 and the brush 59 are the one-revolution cam gear 5
A switch mechanism that detects the rotational position of 0 is configured.
A change in the rotational position of the one-rotation cam gear 50 detected by the switch mechanism and control states of the mirror / shutter drive mechanism 19 and the two clutch mechanisms that are interlocked with the change will be described with reference to FIGS. 2 to 13.

When the brush 59 and the switch contact piece 80a are in contact with each other, the one-rotation cam gear 50 is in 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 lowering (observation position) and shutter charge state shown in FIG. The locking lever cam 74 of the one-turn 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. Further, the compulsory lever cam 75 has the engagement pin 7
7 is not engaged, the force lever 76 is in the non-forced position, and the second clutch mechanism can be connected to the winding side by the clockwise rotation of the second sun gear 30. When the motor is normally driven in this state, the first clutch mechanism is connected to the mirror / shutter drive mechanism 19 side and the one-rotation cam gear 50 is normally rotated. When the motor 17 is reversely driven, the first clutch mechanism causes the film feed. The film F can be wound by being connected to the feeding mechanism 18 side and being connected to the winding upper side by the second clutch mechanism (FIG. 5). Conversely, the one-rotation cam gear 50 is not rotated in the reverse direction when the motor 17 is driven in the reverse direction. This rotational position is called the initial position of the one-rotation cam gear 50, and the contact state between the brush 59 and the switch contact piece 80a is the 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-rotation cam gear 50 is in the rotation position shown in FIG. At the rotational 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 lowering (observation position) and shutter charge state shown in FIG. The lock lever cam 74 is engaged with the cam engagement arm 20b, and the lock lever 20 is held at the lock release position. Further, since the compulsory lever cam 75 also engages with the engagement pin 77, the compulsory lever 76 is moved to the compulsory position, and the second clutch mechanism is connected to the rewinding side (rewinding direction gear 34). Therefore, when the motor 17 is normally rotated, the one-rotation cam gear 50 is normally rotated as in the initial position. On the other hand, in the reverse drive of the motor 17, the first clutch mechanism can be connected to the film feeding mechanism 18 side to rewind the film F. This rotational position is called the rewinding rotational position of the one-revolution cam gear 50, and the contact state between the brush 59 and the switch contact piece 80b is the on state of the rewinding rotational position switch.

When the brush 59 and the switch contact piece 80c are in contact with each other, the one-rotation cam gear 50 is in 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 raising (shooting position) and shutter charge releasing state of FIG. That is, the mirror / shutter drive mechanism 19 is in an exposure-enabled state. This rotation position is called the exposure rotation position (mirror raising position) of the one-rotation cam gear 50, and the contact state between the brush 59 and the switch contact piece 80c is the ON state of the exposure rotation position switch. At the exposure rotation position, the locking lever cam 74 does not engage with the cam engagement arm 20b, and the compulsory lever cam 75 does not engage with the engagement pin 77 either. 76 is in the non-forced position. Therefore, the first clutch mechanism is the mirror / shutter drive mechanism 19 (cam drive gear 2
9) side, the second clutch mechanism receives the clockwise rotation of the second sun gear 30 and winds up (winding direction gear 3
It is ready to connect to 3). Since the revolution of the first planetary gear 27 is restricted in the state of meshing with the cam drive gear 29, the driving force of the motor 17 is equal to that of the mirror / shutter drive mechanism 1.
It is transmitted only to the 9 side, and the one-rotation cam gear 50 is normally and reversely rotated according to the forward and reverse drive of the motor 17.

When the motor 17 is driven in the reverse direction when the one-rotation cam gear 50 is in the exposure rotation position, the one-rotation cam gear 50 rotates in the reverse direction while the engagement lever 20 is held in the engagement position. Then, before the switch contact piece 80a and the brush 59 contact each other (before reaching the initial position), the locking lever cam 7
4 and the cam engaging arm 20b are engaged with each other, and the torsion spring 20
The lock lever 20 moves to the lock release position side against the biasing force of c. The reverse rotation drive of the motor 17 is the drive in the direction of connecting the first clutch mechanism to the film feeding mechanism 18 side if the locking lever 20 is unlocked.
The planetary gear 27 starts revolving. Here cam drive gear 2
Since the driving force to 9 is cut off, the one-rotation cam gear 50 stops at the position shown in FIG. 8, which is different from the initial position in FIG. 5 (when the initial position switch is on). As shown in FIG. 13, if the motor 17 is rotated in the normal direction, the one-rotation cam gear 50 rotates in the normal direction, but if the motor 17 is rotated in the reverse direction, the one-rotation cam gear 50 does not rotate in the reverse direction from the position, and the first planetary gear 50 does not rotate. The gear 27 meshes with the second sun gear 30 and revolves around the second sun gear 30.
The winding operation of the film F is started from the time when the planet gear 32 meshes with the winding direction gear 33. The rotational position of the one-rotation cam gear 50 is not detected by the switch mechanism (see FIG. 12), but since it has a rotational phase different from the initial position, it is particularly called a hoisting rotational position. At the hoisting rotation position,
The mirror / shutter drive mechanism 19 is in the mirror descent (observation position) and shutter charge state shown in FIG. That is, the winding rotation position and the initial position are common in that the mirror / shutter drive mechanism 19 prepares for exposure, and the exposure operation can be started by rotating the one-rotation cam gear 50 forward from any position. One rotation cam gear 5 because possible
It can be said that the charge position is 0. In the reverse rotation of the one-rotation cam gear 50 from the exposure rotation position to the hoisting rotation position, the mirror lowering and shutter charging are completed before the locking lever 20 moves to the locking release position.

FIG. 14 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 substrate 80. Instead of the switch board 80,
The one-turn cam gear 50 is slidably contacted with a plurality of contact pieces of the brush 59.
It is also possible to use a code plate that detects the rotational position of the. This camera is provided with a release switch 81, a forced rewind switch 82, and a rewind light switch 83 which 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 an 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 shooting conditions (whether or not strobe light is emitted, etc.), the date, the number of additional prints, text messages, etc., as magnetic information encoded in the magnetic layer of the film F. Magnetic head 85
Is located closer to the hoisting spool chamber 15 side than the photographic optical axis in the feeding direction of the film F (FIG. 2), and writing of magnetic information is performed during the hoisting operation after the exposure of the photographic frame. The rewind light is a function of re-recording (correcting) the magnetic information thus recorded later. Although the details of the operation will be described later, since the position of the magnetic head 85 is fixed, when performing rewind light, the shooting end frame that has been wound up once is rewound to the shooting position behind the shooting optical path 13 and the frame is sent again. It is necessary to perform magnetic writing while feeding in the direction.

The control circuit 100 is further interlocked with a film feed control sensor 86 for detecting the perforation P provided for each frame of the film F, and the film feed control sensor 86 is used to feed the film F. The amount and rewind amount (piece position) are detected. Further, the timing of the start of magnetic writing by the magnetic head 85 is controlled by the control circuit 100 using the magnetic writing control sensor 87 which similarly detects the perforation P. A data reader 88 for reading the data disk 99 of the film cartridge 90 is installed 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 manufactured by I.K. Film thrust processing when loading a film cartridge II. Release sequence (shooting process for each frame) III. Forced rewinding in the middle of the film IV. Automatic rewinding process from the end of film V. Regarding each process of the rewind write (magnetic rewriting) process, the motor 17 can be driven only by controlling the rotation direction and the rotation amount while detecting the rotation position of the one-rotation 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 forward rotation of the motor 17 refers to the rotational drive of the output shaft 17a in the counterclockwise direction as viewed from the bottom surface side of the camera (FIG. 2,
5 to 8), reverse rotation means the output shaft 17 viewed from the same direction.
It refers to the clockwise rotational drive of a. Further, the expressions of the driving directions of the one-rotation cam gear 50, the first and second clutch mechanisms, and other gears are also based on the views (FIGS. 2 and 5 to 8) viewed from the bottom surface side of the camera, 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, since the film cartridge for the previous time is stopped in a rewound state, the first clutch mechanism is connected to the film feeding mechanism 18, and the second clutch is connected. 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 rewinding rotation position,
The lock lever cam 74 moves the lock lever 20 to the lock release position, and the force lever cam 75 moves the force lever 76 to the force position. (Fig. 6)

At this point, an opening / closing lid (not shown) is opened to insert the film cartridge 90 into the film cartridge storage chamber 14.
And close the open / close 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 open / close lid is locked, a lock signal is input to the control circuit 100 (S2), and the motor 17 is driven in reverse in response to the signal (S3). Since the reverse rotation of the motor 17 rotates the first sun gear 26 in the clockwise direction, the first clutch mechanism keeps the connection to the film feeding mechanism 18 side, and the rewinding direction gear 3
4 is rotated clockwise, and the cartridge spool drive shaft 42 (cartridge spool 9
2) is rotated counterclockwise. Since the rotation of the cartridge spool 92 is the rotation in the rewinding direction, the film F is not delivered from the film cartridge 90, and the cartridge spool 92 idles in the housing 91. During this time, the data reader 88 reads the recorded information on the data disk 99 that 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 to rotate normally (S6). The normal rotation drive of the motor 17 is a drive for moving the second clutch mechanism on the rewinding side to the winding up 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-rotation cam gear 50 rotates forward from the rewinding rotation position (S8). Due to the normal rotation, the forced lever cam 75 is separated from the engagement pin 77 and the forced force of the forced lever 76 disappears. Therefore, the restoring force of the torsion spring 46 moves the forced lever 76 to the non-forced position, and the second planetary gear 32 Becomes ready to mesh with the hoisting direction gear 33. This allows the second clutch mechanism side to feed out the film F, so that it is detected that the switch contact piece 80a and the brush 59 contact each other and the one-rotation cam gear 50 is rotated to the initial position (S
9), stop the motor 17 (S10). In the initial position,
Since the lock lever cam 74 holds the lock lever 20 in the lock release position, the first clutch mechanism can be switched. From step S8 to step S11, the one-rotation cam gear 50 performs the forward rotation indicated by the arrow A in FIG. 13, and during this period, the operation relating to the mirror 70 and the shutter charge is not performed.

Subsequently, when the motor 17 is rotated in the reverse direction again (S
11), the first clutch mechanism (first planetary gear 27) switches connection to the film feeding mechanism 18 (second sun gear 30) side (S12), and the second planetary gear is rotated by clockwise rotation of the second sun gear 30. The gear 32 meshes with the hoisting direction gear 33. That is, the second clutch mechanism is connected to the winding side (S13). As a result, the hoisting spool 16 and the cartridge spool 9
The driving force is transmitted to 2, and both spools rotate in the clockwise direction to start the feeding of the film F. At the initial stage of this delivery, the film F is fed to the cartridge spool 92.
It is self-propelled to the winding spool 16 side only by the rotational force (S14). When the leading end of the film F winds around the winding spool 16, the winding force of the winding spool 16 having a high peripheral speed is mainly used for winding. When the film feeding control sensor 86 detects the feeding of the first frame (S1
5) The reverse rotation of the motor 17 is stopped to enter the shooting standby state (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 through the viewfinder.

[II. Release sequence (photographing process for each frame)] When the film cueing 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 side. is doing. Since the one-rotation cam gear 50 is in the initial position,
The locking lever 20 is in the unlocked position. When the release switch 81 is turned on (S17), the release sequence is started. The shutter release signal is the control circuit 100.
When entering, the shutter holding magnet 89 is first energized to hold the shutter (S18), and then the motor 17 is driven to rotate normally (S19). The forward rotation of the motor 17 causes the first clutch mechanism to move from the film feeding mechanism 18 side to the mirror
The connection is switched to the shutter drive mechanism 19 side (S20),
The one-turn cam gear 50 is normally rotated from the initial position (S21). When the one-rotation cam gear 50 reaches the hoisting rotation position by this normal rotation (S22), the engagement between the locking lever cam 74 and the locking lever 20 is released, and the locking lever 20 is engaged by the biasing force of the torsion spring 20c. After moving to the stop position, the first clutch mechanism is fixed in the connected state with the mirror / shutter drive mechanism 19 (S23).

When the normal rotation of the one-turn cam gear 50 is further continued, the follower pin 5 is attached to the eccentric cam portion 54 of the cam groove 52.
The drive lever 55 is rotated clockwise by being guided by 6. 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 portion 67 is moved to the mirror sheet 7 side.
0a is pushed up to raise the mirror 70 to the photographing position (S
24). Since the shutter charge protrusion 66 is also moving upward, the shutter charge is released (S2
5). Since exposure is now possible, when the ON signal of the exposure rotation position switch (contact between the switch contact piece 80c and the brush 59) is input (S26), the motor 17 is stopped (S27). In step S27, the shutter is held only by the shutter holding magnet 89, and the mirror 70 is retracted from the photographing optical path 13. Here, the shutter holding magnet 89 is de-energized so that the front curtain and the rear curtain of the shutter travel with a predetermined time difference, and the film F is exposed (S2).
8). The one-rotation cam gear 50 from step S21 to step S27 is rotating forward as indicated by arrow B in FIG.

In the control circuit 100, the number-of-photographed-image data read from the data disk 99 in step S4 is recorded. After the exposure, if the exposure frame is the last frame of the film, the automatic rewinding process (FIG. 18) described later is started. If it is not the last frame, the film is wound up and the next frame is sent out (S2).
9). First, the motor 17 is used to lower the mirror 70.
Is reversed (S30). At the exposure rotation position, since the first clutch mechanism is connected and fixed to the mirror / shutter drive mechanism 19 side 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 (S31). . By this reverse rotation, the follower pin 56 is guided from the eccentric cam part 54 to the concentric cam part 53, the drive lever 55 rotates counterclockwise, and the charge lever 64 moves via the first link 60 and the second link 62. It is rotated downward from the position shown in FIG. 4 to the position shown in FIG. By the descending operation of the charge lever 64, the pushing up of the mirror operating portion 67 is released, and the mirror 70 descends to the observation position by the urging force of the torsion spring 72 (S32). At the same time, the charge lever 64 rotates downward, and the shutter charge protrusion 66 performs shutter charge (S33).

When the one-rotation cam gear 50 reaches the hoisting rotation position (S34), the locking lever cam 74 engages with the locking lever 20, and the locking lever 20 is moved to the unlocked position again (S35). . As a result, the first planetary gear 27, which can be revolved, revolves in the direction of the second sun gear 30 and the first clutch mechanism is switched to the film feeding mechanism 18 side (S3).
6). The one-rotation cam gear 50 in which the transmission of the driving force is cut off stops at the hoisting rotation position. On the other hand, in the hoisting rotation position, the second
Since the clutch mechanism can be connected to the winding side, the motor 1
By the film feeding mechanism 18 which is interlocked with the reverse rotation of 7, the winding spool 16 and the cartridge spool 92 rotate in the clockwise direction (feeding direction), and the film F is wound (S37). During this winding operation, magnetic writing on the film F is performed by the magnetic head 85. The start timing of magnetic writing is controlled by the control circuit 100 using the magnetic writing control sensor 87. In addition, from step S31 to step S34, the one-rotation cam gear 50 is shown in FIG.
Reverse rotation indicated by arrow C is performed. When the film feeding control sensor 86 detects the end of the winding of one frame (S38), the motor 17 is stopped to enter the standby state for the next release sequence (S39).

At this point, the rewind light switch 83 is turned on (S40), and the rewind light processing described later can be started. When the forced rewinding switch 82 is turned on without turning on the rewind light switch 83 (S41)
The process moves to the forced rewinding 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 forward rotation of the one-turn cam gear 50 from step 1 to step S27 differs from the above description in that it starts from the hoisting rotation position (arrow B'in FIG. 13).

[III. Forced rewinding in the middle of the film]
In the end state (S39) of the photographing sequence, the one-rotation cam gear 50 is in 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 side. The locking lever 20 is in the unlocked position. When the forced rewind switch 82 is turned on (S41), the control circuit 100 energizes the shutter holding magnet 89 (S42), and then the motor 17 is normally rotated (S43). The forward rotation of the motor 17 connects the first clutch mechanism to the mirror / shutter drive mechanism 19 (S4
4), the one-turn cam gear 50 is normally rotated from the hoisting rotation position (S45). This forward rotation is for switching the second clutch mechanism to the rewinding side. As described above, since the one-rotation cam gear 50 cannot rotate in the reverse direction from the hoisting rotation position, the one-rotation cam gear 50 needs to rotate in the normal direction from the hoisting rotation position to the rewinding rotation position. During this normal rotation, the one-rotation cam 50 passes through the exposure rotation position, so that the raising / lowering operation of the mirror 70, the shutter charge release and the recharge operation, etc. occur (S46 to S5).
1). The reason why the shutter is held in step S42 is to prevent the exposure of the film F by preventing the shutter from traveling even when the shutter charge is released (S48). The locking lever 20 is engaged with the locking lever cam 74 and moves to the locking release position when the one-rotation cam gear 50 approaches the rewinding rotation position (S51).

When the one-rotation cam gear 50 continues to rotate normally and the forcing lever cam 75 engages with the engaging pin 77, the forcing lever 76 is moved to the forcing position and the second clutch mechanism is connected to the rewinding side (S52). . Therefore, the brush 59 and the contact piece 8
0b comes into contact and the rewinding rotation position switch is turned on (S5
3) Release the energization of the shutter holding magnet 89 (S
54), the motor 17 is stopped to hold the second clutch mechanism on the rewinding side (S55). The one-rotation cam gear 50 from step S45 to step S55 is rotating forward as indicated by arrow D in FIG.

Subsequently, the motor 17 is rotated in the reverse direction (S56).
Then, since the locking lever 20 is at the locking release position, the revolution of the first planetary gear 27 is not regulated, and the first clutch mechanism is switched to the film feeding mechanism 18 side (S57). Motor 1
When the reverse rotation of 7 is continued, the rewinding direction gear 34 is rotated counterclockwise via the second planetary gear 32. Rewinding direction gear 3
The rotation of 4 rotates the cartridge spool drive shaft 42 in the counterclockwise direction.
The film F is rewound by 2 (S58).
The winding 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
59) In order to expose the rotation position display plate 96 to the exposure state display hole 94 indicating partial exposure, the cartridge spool 92 is rotated to a predetermined rotation phase (S60), and then the motor 17 is stopped (S61). After the motor 17 is stopped, the lock of the opening / closing lid is released and the film cartridge 90 is taken out from the film cartridge storage chamber 14. The exposed state of the film cartridge 90 taken out can be visually confirmed through the exposed state display hole 94.

[IV. Automatic rewinding process from the end of film]
When the forced rewinding is not performed, if the exposure frame is the last frame in step S29 of the release sequence, as shown in FIG.
The automatic rewinding process shown in 8 is started. Even in the case of the last frame, the hoisting operation is necessary for magnetic writing, so the motor 17 is rotated in the reverse direction (S62). As a result, the one-turn cam gear 50
Reversely rotates from the exposure rotation position (S63), and the mirror 70
And shutter charge are performed (S64, S6).
5). When the one-rotation cam gear 50 reaches the hoisting rotation position (S
66), the locking lever 20 moves to the locking release position (S6
7), the reverse driving force of the motor 17 is the film feeding mechanism 18
(S68). Therefore, the last frame is hoisted by the reverse driving force of the motor 17, and magnetic writing is performed on the last frame by using the magnetic head 85 (S69). When the film feeding control sensor 86 detects that the winding of the final frame is completed (S70), the motor 17 is stopped (S71).
Thereafter, the forced rewinding step S42 shown in FIG. 17 is automatically entered to rewind. At that time, unlike the case of the forced rewinding, the rotation stop position of the cartridge spool 92 in step S60 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) Process] In the end state (S39) of the above-described photographing sequence, the one-rotation cam gear 50 is at the hoisting rotation position,
The first clutch mechanism is connected to the film feeding mechanism 18, and the second clutch mechanism is connected to the winding side. When the rewind light switch 83 is turned on in step S40, the rewind light processing shown in FIGS. 19 and 20 starts. First, the shutter holding magnet 89 is energized to hold the shutter (S72), after which the motor 17 is driven to rotate normally (S73). This normal rotation drive is a preparatory stage for rewinding the exposed shooting frame to the shooting position again, and the first clutch mechanism is the mirror / shutter drive mechanism 19
Then, the one-rotation cam gear 50 is normally rotated from the hoisting rotation position (S75). At this time, since the one-rotation cam gear 50 rotates in the direction of arrow D in FIG. 13, steps S46 to S5 in the rewinding sequence are performed.
As in the case of 1, mirror raising / lowering operations and the like occur (S76 to S8).
In 1), however, the shutter is held by the magnet 89, so that the shutter is not exposed again. When the compulsory lever cam 75 engages with the engagement pin 77, the compulsory lever 76 is moved to the compulsory position, and the second clutch mechanism is switched to the rewinding side (S82). When the rewinding rotation position switch of the cam gear 50 is turned on (S83), the shutter holding magnet 89
Is de-energized (S84), the motor 17 is stopped and the second
The clutch mechanism is held on the rewinding side (S85). Next, when the motor 17 is rotated in the reverse direction (S86), the one-rotation cam gear 5
Since the locking lever cam 74 of 0 holds the locking lever 20 in the locking release position, the first clutch mechanism is switched to the film feeding mechanism 18 side (S87). When the reverse rotation of the motor 17 is continued, the cartridge spool drive shaft 42 is rotated counterclockwise and the film F is rewound (S8).
8). When the film feeding control sensor 86 detects the completion of rewinding for one frame (S89), the motor 17
Is stopped (S90).

As a result, the magnetically written photographing frame returns to the photographing position behind the photographing optical path 13. Subsequently, as a preparatory step for feeding the film F, the motor 17 is rotated in the normal direction (S
91), the first clutch mechanism is connected to the mirror / shutter drive mechanism 19 side (S92). When the normal rotation of the motor 17 is continued, the one-rotation cam gear 50 is normally rotated from the rewinding rotation position (S93). With this forward rotation, the forced lever cam 75
The engagement pin 77 is disengaged, and the compulsory lever 76 returns to the non-compulsory position. When the one-rotation cam gear 50 rotates normally, the rotational position detected next to the rewinding rotational position is the initial position. Therefore, when the brush 59 contacts the contact piece 80a (S94), the motor 17 is stopped (S95). . One rotation cam gear 5 from step S93 to step S95
The rotation of 0 is indicated by arrow A in FIG.

Next, when the motor 17 is rotated in the reverse direction (S9
6), since the locking lever 20 is in the unlocked position, the first
The clutch mechanism is switched to the film feeding mechanism 18 side (S97). The second clutch mechanism that is interlocked with the reverse rotation of the motor 17 is connected to the winding upper side (S98), and the winding spool 16
The film F is wound up by the cartridge spool drive shaft 42. During the winding operation, the magnetic head 85 rewrites magnetic information (S99). Since the rewriting is completed during the winding of the frame, when the winding completion of one frame is detected (S100), the motor 17 is stopped and the rewind write process ends (S101). Here, the forced rewind switch 82 can be turned on to enter the forced rewind sequence (FIG. 17) (S102).
When forced rewinding is not performed, since the unexposed shooting frame is located behind the shooting optical path 13, the shooting sequence (S17-) of FIG. 16 can be entered. However, the one-rotation cam gear 50 is at the initial position at the end of the rewind light, as at the end of the film cueing (FIG. 15). Therefore, only when the rewind write is performed, the one-rotation cam gear 50 enters the release sequence from the initial position even after the second frame (arrow B in FIG. 13, FIG. 16). Also, in the forced rewinding after the rewind write, the one-rotation cam gear 50 is rotated from the initial position (arrow D ′ in FIG. 13, FIG. 17).

The above embodiment has the following advantages. First, the driving force transmission mechanism can have a simple structure even though it is a one-motor drive system. Specifically, two clutches each having a planetary gear mechanism, a locking lever 20 and a compulsory lever 76 that operate each clutch, and a locking lever cam 74 and a compulsory lever cam 75 that are provided in the one-rotation cam gear 50 that controls each lever. All the above-mentioned operations can be controlled by a simple mechanism provided with. Further, the forward rotation of the motor 17 causes the mirror to be raised and the shutter charge to be released.
Since the mirror is lowered, the shutter is charged, and the film is fed (winding and rewinding) by reversing, the film is wound without stopping the motor 17 after the exposure. That is, the film feed in the shooting sequence can be made faster than in the conventional one-motor drive camera.

The above-described embodiment particularly relates to a motor-driven single-lens reflex camera compatible with the new photographic system, and is characterized in that initial film feeding and rewind light operation are possible with a simple structure. Conversely, except for the processing sequence of the initial thrust (FIG. 15) and the rewind light (FIG. 19, FIG. 20) when the cartridge is loaded from the above processing routine, the present invention does not change the configuration.
It can be applied to cameras for conventional formats such as 35 mm format . More specifically, in the case of this type of camera , the magnetic writing (steps S37 and S99) and the operation relating to the parking position control of the cartridge spool 92 (step S60) are not necessary, and therefore the control is omitted. Further, in the above-described embodiment, the rewind light re-records the magnetic information of the previous frame, but the film feeding control sensor 86 and the control circuit 100 are linked to store a plurality of feeding frames. It is possible to rewind and write even a piece before the piece.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the one-rotation cam gear 50 cannot rotate in the reverse direction from the hoisting rotation position. Therefore, during the rewinding operation, the one-rotation cam gear 50 is rewound from the hoisting rotation position through the exposure rotation position once. Had to rotate into position. That is, when the film is rewound, the mirror 70 is moved up and down and the shutter charge is released. To avoid this, the locking lever 20
May be moved to the locking position and the locking release position by using an electromagnet without interlocking with the one-rotation cam gear 50. In this case, when the one-rotation cam gear 50 is in the hoisting rotation position or the initial position, the locking lever 20 can be moved to the locking position to reversely rotate the one-rotation cam gear 50 to the rewinding rotation position. If the locking lever 20 is moved to the unlocked position when the one-rotation cam gear 50 reaches the rewinding rotational position, the reversal of the motor 17 is interlocked with the film feeding system 18, so that rewinding can be performed. . Therefore, the film rewinding can be performed quickly without causing the operation of the mirror / shutter system and without using the shutter holding magnet 89. Similarly, at the time of rewind light, by moving the locking lever 20 to the locking position at the winding rotation position of the one-rotation cam gear 50 and rotating the one-rotation cam gear 50 in the reverse rotation to the rewinding rotation position by the reverse rotation of the motor 17, Rewind light can be performed without raising or lowering the mirror.

[0063]

As described above, according to the present invention, a single-lens reflex camera in which the mirror / shutter drive system and the film feeding system are driven by a single motor can be constructed with a simple mechanism, so that the size and cost of the camera can be reduced. Further, it is possible to obtain a 1-motor drive single-lens reflex camera that can contribute to the film and has a faster film feed than the conventional single-motor camera. Further, it is possible to provide a single-motor drive single-lens reflex camera for a self-propelled film cartridge which enables rewriting of magnetic recording with a simple configuration.

[Brief description of drawings]

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

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

FIG. 3 is a side view showing the mirror / shutter drive mechanism in a mirror descending state from the side of the camera.

FIG. 4 is a side view showing a mirror raised state of the mirror / shutter drive mechanism of FIG.

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

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

FIG. 7 is a bottom view of the essential parts 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 essential parts of the film feeding mechanism when the one-rotation cam gear is in the winding rotation position and the clutch mechanism is in the film winding state.

FIG. 9 is a diagram illustrating a contact state between the brush and the switch substrate when the one-rotation cam gear is at the initial position, as viewed from the camera bottom surface side.

FIG. 10 is a diagram illustrating a contact state between the brush and the switch substrate when the one-rotation cam gear is in the rewinding rotation position, from the bottom side of the camera.

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 exposure rotation position from the bottom surface side 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 in a winding rotation position from the bottom surface side of the camera.

FIG. 13 is a timing chart showing the rotation of a one-rotation cam gear and the control state of each mechanism.

FIG. 14 is a block diagram showing an electric circuit of a camera.

FIG. 15 is a flowchart showing a film thrust process.

FIG. 16 is a flowchart showing a release sequence.

FIG. 17 is a flowchart showing a forced rewinding process in the middle of the film.

FIG. 18 is a flowchart showing an automatic rewinding process from the last frame.

FIG. 19 is a flowchart showing a rewind write process.

20 is a flowchart showing the continuation of the rewind write processing shown in FIG.

FIG. 21 is a perspective view showing a self-propelled film cartridge from one end surface side.

22 is a perspective view showing the film cartridge of FIG. 21 from the other end surface side.

[Explanation of symbols]

11 camera body 14 Film cartridge storage room 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 Second Sun Gear 32 Second planetary gear 33 Hoisting gear 34 Rewinding gear (one-way clutch gear) 38 Winding spool drive gear 40 reduction gear train 41 Cartridge spool drive gear 42 Drive shaft 50 one-turn 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 the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03B 17/00 G03B 17/42 G03B 19/12

Claims (9)

(57) [Claims] 1. A motor-driven single-lens reflex camera in which a mirror / shutter drive system controls up / down movement of a mirror and a shutter charge, and a film feed system winds and rewinds a film by rotating a motor in forward and reverse directions. Can be moved to the clutch fixed position and the clutch switching allowable position at
Has a locking lever, and the locking lever is in the clutch fixing position.
When the motor is in the
The driving force in the opposite direction is transmitted to the mirror / shutter drive system,
When the stop lever is in the clutch switching allowable position, the motor
Depending on the forward and reverse rotation of the
And the film feeding system, and the first
Have forced lever movable into a winding position and a rewinding position; pitch means and
The motor is linked to the film feeding system by the first clutch means.
This moving lever moves to the hoisting position when
In some cases, the motor is interlocked with the hoisting system to move it to the rewinding position.
The motor to the rewinding system when the second
The clutch means of; the rotation of the motor is mirrored by the first clutch means.
It rotates when it is linked to the shutter drive system,
In this position, the mirror descending state and shutter charge state are maintained.
Hold the mirror at an exposure rotation position different from the charging position.
Single-rotation cam that raises and releases shutter charge
And; equipped on this one-turn cam, centered around the charge position
And rewind at the rotation position opposite to the exposure rotation position.
At the rotation position, rewind the forced lever from the hoisting position.
A forced lever cam for forcibly moving to the position;
Move to the clutch fixed position, charge position and rewind
Locking lever that moves to the clutch switching allowable position in the rolling position
In the release sequence, the motor is rotated in the normal direction to make one rotation.
Exposure from the charge position to the exposure rotation position.
After that, rotate the motor in the reverse
From the charging position to the lowering position of the mirror
Charge the film, and by reversing the motor, the film
Motor-driven single-lens reflex camera characterized by hoisting
La. 2. The motor driven single lens reflex camera according to claim 1, wherein the locking lever moving means is provided with a spring member for urging the locking lever to a clutch fixing position; A motor-driven single-lens reflex camera having: a lock lever cam forcibly moving the lock lever from the clutch fixed position to the clutch switching allowable position at the charge position and the rewinding rotation position of the rotary cam. 3. The motor-driven single-lens reflex camera according to claim 2 , further comprising an electromagnet for holding a shutter,
A motor-driven single-lens reflex camera in which when the film is rewound, the movement of the shutter is restricted by the attraction force of the electromagnet, and then the motor is rotated in the normal direction to rotate the one-rotation cam from the charging position to the rewinding rotation position in the forward direction. 4. The motor-driven single-lens reflex camera according to claim 1, wherein the locking lever moving means moves the locking lever between a clutch fixing position and a clutch switching allowable position without depending on a rotational force of a one-turn cam. A motor-driven single-lens reflex camera having an electromagnet. 5. The motor-driven single-lens reflex camera according to claim 4, wherein at the time of film rewinding, the locking lever is moved to the clutch fixing position at the charge position of the one-rotation cam, and then the motor is rotated in the reverse direction to rotate the one-rotation cam. A motor-driven single-lens reflex camera that reverses the rotation from the charging position to the rewinding rotation position. 6. The claims 1 to 5 motor driven single-lens reflex camera according to any one of the motor drive single-lens reflex camera configured first and second clutch means from the planetary gear mechanism. 7. A self-propelled film cartridge is used to control the up / down movement of a mirror and shutter charge by a mirror / shutter drive system, and the winding and rewinding of a film by a film feeding system with a single motor. A motor-driven single-lens reflex camera that rotates in the direction of rotation has a locking lever that can move between the clutch fixed position and the clutch switching allowable position. , The forward / reverse driving force of the motor is transmitted to the mirror / shutter drive system, and when the locking lever is in the clutch switching allowable position, the motor is driven by the mirror / shutter drive system and the film feed according to the forward / reverse rotation of the motor. A first clutch means for switching to and interlocking with a feeding system; and a forcible lever movable to a winding position and a rewinding position,
When the motor is interlocked with the film feeding system by the first clutch means, the motor is interlocked with the hoisting system when the compulsory lever is in the hoisting position, and the motor is rewinding system when it is in the rewinding position. Second clutch means for interlocking and switching to; mirror rotation of the motor by the first clutch means
One rotation that is rotated when linked to the shutter drive system, holds the mirror's lowered state and shutter charge state at the charge position, and raises the mirror and releases shutter charge at an exposure rotation position different from the charge position. A cam; provided at this one-rotation cam and forcibly moving the forcing lever from the hoisting position to the rewinding position at the rewinding rotational position in a rotational position opposite to the exposure rotational position about the charge position. A forcible lever cam; and a locking lever moving means for moving the locking lever to a clutch fixed position at the exposure rotation position of the one-rotation cam, and to a clutch switching allowable position at the charging position and the rewinding rotation position, In the release sequence, the motor is rotated in the normal direction and the one-rotation cam is rotated from the charge position to the exposure rotation position in the forward direction to perform exposure. After that, the motor is rotated in the reverse direction, and the one-rotation cam is rotated in the reverse direction from the exposure rotation position to the charging position to lower the mirror and shutter-charge, and the reverse rotation of the motor winds the film. A motor-driven single-lens reflex camera for a self-propelled film cartridge, characterized by rotating the motor in the forward direction and holding the one-rotation cam at the charge position, and then reversing the motor. 8. The motor-driven single-lens reflex camera for a self-propelled film cartridge according to claim 7 , further comprising: a spring member for urging the locking lever to a clutch fixed position; A locking lever cam for forcibly moving the locking lever from the clutch fixed position to the clutch switching allowable position at the charge position and rewinding rotation position of the one-rotation cam; and a magnetic head for performing magnetic recording on the magnetic layer of the film. When rewriting magnetic recording, the motor is rotated in the forward direction to rotate the cam once from the charge position to the rewinding rotation position, and then the motor is rotated in the reverse direction to rewind the motor. A motor-driven single-lens reflex camera for a self-propelled film cartridge that holds the rotating cam in the charging position and then winds the motor in reverse. 9. The motor-driven single-lens reflex camera for a self-propelled film cartridge according to claim 7 , further comprising moving a locking lever between a clutch fixing position and a clutch switching allowable position without depending on a rotational force of a one-rotation cam. An electromagnet for driving; a magnetic head for magnetically recording on the magnetic layer of the film; When rewriting magnetic recording, the locking lever is moved to the clutch fixed position, and the motor is rotated in the reverse direction to charge the one-turn cam to the charging position. To the rewinding rotation position, the locking lever is moved to the clutch switching allowable position at the rewinding rotation position, and the motor is rotated in the reverse direction to rewind the motor. A motor-driven single-lens reflex camera for a self-propelled film cartridge that holds the lens in the charge position and then winds the motor in reverse.