JP2753824B2 - Camera control mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal mechanism of a camera using a motor for a film feeding mechanism and a charging mechanism such as a mirror and a shutter.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a camera in which a motor is built in the camera and automatically performs film winding and rewinding, operation and return of an internal mechanism, and the like. In particular, use the first motor to perform work related to film winding, and use the second motor to charge mechanical systems such as mirrors and shutters.
It is known to use a third motor to perform the work associated with film rewinding.

[0003]

However, in the case of performing operations other than the actual normal photographing operation, the camera must perform optimal operations. These are, for example, an idle feeding operation and a return operation after rewinding.

Further, since this type of camera naturally uses some power source, it is necessary to take measures against power consumption. In an extreme case, if the battery is removed during shooting, the power source is turned on again. It must be configured to return reliably.

As described above, the problem of power consumption also exists during operations other than photographing, such as idle feeding and rewinding, and measures for solving the problem are extremely difficult.

Conventionally, in order to solve these problems, there has been proposed a technique of performing an all-reset once when the power is turned on regardless of whether or not the internal mechanism has been completed. It is obvious that this is a loss from the viewpoint of power consumption because the reset is uselessly performed again despite the possibility that the reset has already been performed.

[0007]

Therefore, in order to solve these problems, according to the present invention, a rewinding device (98, 9) for rewinding a film using a driving force from a driving source (97).
9, 101, 93, 94, 103, 104, 106), a first switch (88) that can be externally operated and can be set to a rewinding state in accordance with the operation, A second switch (96) that is operable and can be set to a rewind state in accordance with the operation; a warning unit (206) that performs a warning operation; and the first switch and the second switch are in the rewind state. Is set to allow the film rewinding operation by the rewinding device, and if only one of the two switches is set to the rewinding state,
Control means (200, 201, 97) for inhibiting the rewinding operation and activating the warning means.

[0008]

[Function] Detects the state of the switch set to the rewind state,
Since the rewind operation is controlled based on the detection result, even if the rewind operation is stopped due to sudden power consumption during the rewind operation, the state of the switch is determined when the switch is restarted. Then, the rewinding operation is automatically continued. Therefore, it is possible to provide a camera that is easy to use for the photographer. In addition, if the rewind operation is not accurately performed by the photographer, a warning unit is provided to notify the photographer of the rewind operation. it can.

[0009]

FIG. 1 shows an embodiment of the present invention, in which a film winding, a shutter charge, a mirror drive system charge, and an electromagnetic release are shown.

The configuration will be described below with reference to FIG.

In the state shown in the figure, each charge and film winding have been completed.

Reference numeral 3 denotes a release magnet, and a lever 4
The armature fixed to the armature 5 is configured to maintain the suction state when no voltage is applied, and release the suction when a predetermined voltage is applied.

The release lever 4 operates integrally with the lever 5 via a shaft 5a, but at the same time
Is usually dominated by one.

[0014] These are generally given a left turning force by a spring 4a. The locking lever 6 is rotatably supported by the shaft 5a and is provided with a right turning force by a spring 6a, but is limited by the lever 5.

The right turning force of the spring 6a is weaker than the left turning force of the spring 4a.

The lever 7 is provided with a right turning force by a spring 7a, but in this state, it is restricted by the locking lever 6. One end thereof can be brought into contact with the mirror start lever 8.

The lever 12, which is coaxially supported by the lever 7, is provided with a left turning force by a spring 12a, and is engaged with one end of the lever 13 to prevent the right turning. The lever 15 is configured to rotate integrally with the lever 13 by an internal force spring 14, and is provided with a right turning force by a spring 15a.

The mirror start lever 8 is provided with a left turning force by a spring 8a, and prevents the mirror up lever 9 provided with a right turning force by a spring 9b from turning right. The mirror up lever 9 has one end 9a which can be brought into contact with a pin 11 implanted in the mirror 10. However, when the lever 9 is in the state shown in the figure, the mirror 10 maintains this position by the spring 11a.

Lever 17 that can be brought into contact with one end of lever 15
The other end has a magnet-hold lever 1 with a shutter system.
Contact 6 The magnet hold lever 16 is a lever for holding the front curtain and rear curtain magnets of the shutter until the magnets are energized and attracted, but a known mechanism is omitted. Reference numeral 18 denotes a rear curtain switch that turns on and off in conjunction with the rear curtain of the shutter.

The motor 20 has gears 21, 23, 24a,
The mirror charge cam 34, the shutter charge cam 33, and the charge completion detection plate 35 are configured to be rotatable via 26, 28, 29, 30, and 32.

The mirror charge cam 34 is configured to abut the mirror charge lever 39 and rotate it. One end 39a of the mirror charge lever 39 has the lever 4
0 and the other end 39b can be in contact with the levers 7 and 13.

The shutter charge cam 33 is arranged so that the shutter charge lever 36 can be operated. One end 36a of the shutter charge lever 36 is connected to the lever 3
8, it is possible to charge a shutter mechanism (not shown).

A charge completion detecting plate 35 which rotates integrally with the mirror charge cam and the shutter charge cam.
The pin 42 is provided at a position where it can come into contact with the lever 5 and the lever 43, and has a cutout portion 35a into which the lever 41 enters. The charge completion switch 19 is arranged so as to interlock with the operation of the lever 41.

Gear 2 among the gears linked to motor 20
4 is configured to be movable in the axial direction with respect to the shaft 22 and to be integrally formed in the rotational direction, and to move up and down in conjunction with the operation of the lever 116 as described later.
The gear ratio can be changed depending on whether the gear portion 24b is engaged with the gear 27.

Next, the structure of the film winding mechanism will be described. A motor 52 disposed in a spool 65 for film winding rotates a gear 54 supported by a known slip mechanism 53. This power is gear 5
6, 57, 59, 61, 62, 63, 64, 66 to the spool 65.

Here, the gear 57 is, like the gear 24,
The gear ratio is changed depending on whether the gear portion 57a is engaged with the gear 59 or the gear portion 57b is engaged with the gear 60 while being fixed in the rotational direction with respect to the shaft 55 but sliding in the axial direction. Has become possible.

The gear 64 is vertically movable so as to be disengaged from the gear 66 by turning the lever 86 counterclockwise.

The sprocket 67 is provided at a position where the sprocket 65 rotates when the film F is fed by rotation of the spool 65. This includes a gear 71, a winding completion detection plate 70,
The hoisting limit 69 is integrally formed.

The gear 71 is connected to a gear 12 via a gear train (not shown).
2 is engaged.

Reference numeral 73 denotes a detection lever, one end of which is in contact with the winding completion detection plate 70 and the other end of which is configured to be capable of turning on and off the winding switch 51, and is also in contact with one end of the lever 87. It is accessible. The detection lever 73 is given a left turning force by a spring 73a.

One end 50a of the limit lever 50 which engages the hoisting limit 69 is provided adjacent to the hoisting limit 69, and receives a right-handed turning force by the spring 50c.
In a state where b is engaged with the locking lever 49, the operation is prevented. The other end 50d is configured so that the hoist switch 51 can be turned ON and OFF.

The first rewind lever 82 is supported by a shaft 83 integrally with a cover 84 and a lever 84, and a spring 82
The left turning force is given by a.

The cover lever 84 engages with a pin implanted in the slide lever 85, and can move the lever in the left-right direction. The left end 85a of the slide lever 85 engages the first rewind switch 88 so that the first rewind switch 88 can be turned ON and OFF, and the convex portion 85b at the right end engages the left turn of the lever 86 when the slide lever 85 moves from left to right. doing.
Similarly, the other convex portion 85c can be engaged so as to rotate the lever 87 counterclockwise.

The key 80 is provided with a right turning force by a spring 80a.
Can be held at the position where is turned ON.

The lever 47, which can be brought into contact with the key 80 so as to rotate leftward, is formed integrally with the lever 43 and the shaft 46, is provided with a leftward turning force by a spring 47a, and has a lever 48 at the end 47b. It is rotatably connected. The lever 48 is provided with a clockwise turning force by a spring 48a, and can be brought into contact with the lever 49 such that the lever 49 is turned clockwise with the rightward movement, and the end 48b can be brought into contact with one end of the lever 77. .

Next, the multiple exposure mechanism will be described.

A multi-exposure lever 74 is provided with a right turning force by a spring 74a, and a multi-cam 76 and a lever 78 are integrally fixed by a shaft 75.

The multiple cam 76 is provided with a cam shape capable of abutting on the lever 77 and turning clockwise.

A lever 79, which is provided with a left turning force by a spring 79a, contacts the lever 78. Lever 79
The other end of the lever 80 is configured to be able to contact the lever 81,
It is linked with.

Reference numeral 123 denotes a counter. When the sprocket 67 rotates due to the movement of the film F , the one-tooth gear 122 rotates through a gear train (not shown) interlocked with the gear 71, and counts up. One tooth gear 1
Reference numeral 22 denotes a back pig interlock lever 120 that is interlocked with the back pig 119.
, The engagement with the counter 123 is managed. Reference numeral 124 denotes a counter switch which is turned off when the count value indicates 1 or more.

Reference numeral 109 denotes a film presence / absence switch, which is configured to be turned off via the film detection pin 108 when the film F is present at least in the vicinity of the sprocket 67.

The release button 1 is configured such that the lower end 1a thereof comes into contact with the half-press release switch 2, and the half-press ON and the release ON are sequentially performed according to the stroke.

Reference numeral 112 denotes a frame speed switching cam, which is fixed to a feed mode select dial 111 which can be operated from the outside, has frame speed switching switches 113 and 114, and can operate a lever 115 with its rotation. It has a cam part. The changeover switches 113 and 114 have three positions of “high-speed continuous feeding”, “low-speed continuous feeding”, and “single-frame feeding”, and are turned on by the former two and turned off by the latter. The state in the figure is the “high-speed continuous feeding mode”.

The lever 115 is provided with a left turning force by a spring 115a, and one end of the lever 115 can contact the lever 116.

The lever 116 and the lever 118 are rotatably supported on the same axis, respectively, and their interlocking state is regulated by a spring 117 in both clockwise and counterclockwise directions. Further, a left turning force is given by the spring 116a as a whole.

The pin 116b implanted on the lever 116 enters the groove 24c of the gear 24, and the pin 118a on the lever 118 enters the groove 57c of the gear 57, and can move up and down.

Next, the structure of the rewinding mechanism will be described with reference to FIG.

Reference numeral 97 denotes a motor for rewinding the film, which includes a worm gear 98, a worm wheel 99, and a shaft 10.
0, engages with the gear 93 via the gear 101.

The gear 93 can be slid in the vertical direction within a range that does not disengage from the gear 101. Normally (when rewinding is not performed), the gear 93 is positioned below by the spring 93a.

The gear 94 is engaged with the gear 93 only when the gear 93 is located at the upper position. The gear 94 is integral with the gear 103 via a known slip machine 102 and is engaged with the rewind shaft gear 104. The rewind shaft gear 104 is restricted with respect to the rewind shaft 105 only in the rotation direction.

The rewind shaft 105 has a rewind knob 107 having a rewind crank 107a on an upper portion and a fork portion 106 engageable with a key of a film cartridge in a lower portion.

Reference numeral 110 denotes a back cover key which is configured to be able to contact the fork portion 106. When the back cover key 110 is pulled upward against the spring 110a, the back cover 119 is disengaged from a key portion (not shown). Open the back pig.

The second rewind lever 89 can be operated from outside the camera, and the lever 90 is fixed. The left end of the lever 90 can turn on the second rewind switch 96, and is integrated with the lever 92 by an internal force spring 91.

Reference numeral 95 denotes a click spring for positioning the lever 91. The lever 92 is provided with a pin 92a,
The gear 93 can be pushed up from below.

Reference numeral 125 denotes a back cover switch,
It is configured to be OFF when the switch 9 is opened and ON when the switch 9 is closed.

Next, the operation of each mechanism will be described with reference to FIGS.

[Procedure until release of one frame after release] When the release button 1 is pressed, the lower end 1a switches the half-press release switch 2 in the order of the half-press switch ON and the release switch ON, and a release signal is generated. When the release magnet 3 is energized by the release signal and the attracted state is released, the lever 45 having the armature and the release lever 4 integrally rotate counterclockwise by the force of the spring 4a, and the lever 5 simultaneously rotates counterclockwise. Therefore, the locking lever 6 is also connected to the lever 5
To turn left and release the engagement with the lever 7.

The lever 7 starts clockwise rotation by the spring 7a. First, the mirror start lever 8 is kicked, and the engagement with the mirror up lever 9 is released, so that the spring 9b is released.
The mirror 10 is turned counterclockwise via the mirror pin 11 by the force of (1) to start the mirror up.

The lever 7 continues to rotate clockwise and the lever 12
Is kicked, and the engagement between the lever 12 and the lever 13 is released. For this reason, the levers 13 and 1 are
Reference numeral 5 integrally turns clockwise, turns the lever 17 counterclockwise, turns the magnet hold lever 16 clockwise, and releases the hold of the shutter magnet. However, prior to this, since the shutter system magnet has been charged by the release signal, the attracted state is maintained.

In parallel with these operations, a timer circuit is activated when a release signal is generated, and after a predetermined time has elapsed, energization of the shutter front curtain magnet is stopped. Here, the predetermined time is a time from when the mirror raising and the aperture stop are completed and stabilized, until the exposure becomes ready to start.

The armature is separated by stopping the energization of the front curtain magnet, and the front curtain (not shown) starts running. Thereafter, after a shutter time determined by a predetermined procedure has elapsed, the energization of the rear curtain magnet is also stopped, the armature is separated, and the rear curtain travel is started. The trailing-curtain switch 18 is turned on in conjunction with the trailing-curtain running. This trailing-curtain switch is connected in parallel with the charge-completion switch 19, and the motor 20 is turned on by turning on any of these switches as described later. Since it is configured to start energization, the rear curtain switch 1
Rotation starts immediately after 8ON.

For this reason, the power is supplied to the gear 21 of the motor 20, the gears 23 and 24 on the shaft 22, and the gear 2 on the shaft 25.
6, 28, and further transmitted through gears 29, 30 so that the gear 32 is turned to the left.

The leftward rotation of the gear 32 causes the shutter charge cam 33, the mirror charge cam 34,
The charge completion detection plate 35 also starts counterclockwise. As the shutter charge cam 33 rotates counterclockwise, the shutter charge lever 36 also rotates counterclockwise, and the shutter 38 is turned clockwise to reset the leading curtain and trailing curtain that have finished traveling. As a result, the rear curtain switch 18 also returns to OFF.

The mirror charge cam 34 rotates the mirror charge lever 39 clockwise and the mirror up lever 9 through the lever 40 counterclockwise. At about the same time, the mirror charge lever 39 is turned clockwise to rotate the lever 7 and the levers 13 and 15.
Turn left. Therefore, the mirror start lever 8 is reset by the counterclockwise rotation of the lever 7, so that the mirror up lever 9 is engaged with the mirror start lever 8 again, and the mirror 10 returns to the position shown in the figure by the force of the spring 11a.

By turning the levers 13 and 15 counterclockwise, the lever 1
7 through the shutter magnet hold lever 1
6 turns left and returns to the position for holding the shutter magnet again. At this time, even after the lever 13 comes to the holding position, the lever 13 continues to rotate leftward, but the lever 15 does not move any more due to the bending of the internal force spring 14. Soon lever 1
3 is engaged with the lever 12 and reset so as to maintain the position shown.

The lever 7 also engages with the locking lever 6 by turning it counterclockwise, and is reset to the position shown in the figure.

The resetting of these levers 13 and 7 is completed before the mirror charge cam 34 makes one rotation.
At the time of one rotation, the cam follower portion of the mirror charge lever 39 falls into a lower portion of the cam, so that the next operation of the mirror up lever 9, the lever 7, and the like is not hindered.

The pin 42 provided on the charge completion detection plate 35 that rotates counterclockwise with the same shaft 31
To the right.

When the lever 5 rotates clockwise, the levers 4 and 45 also integrally rotate clockwise to reset the armature of the release magnet 3. At this time, the internal force spring 44 absorbs the excessive rotation angle by bending.

With the leftward rotation of the charge completion detection plate, the lever 4 inserted into the notch 35a provided on the side surface thereof
1 turns clockwise and turns on the charge completion switch 19.
As described above, with the rotation of the shaft 31, the shutter rear curtain is returned by the counterclockwise rotation of the shutter charge lever 36, and the rear curtain switch is also turned off. However, with respect to the rotation phase angle of the shaft 31, the charge completion switch 19 is turned on.
Since the rear curtain switch is configured to be turned off, the rotating motor 20 does not stop at this point when either the rear curtain switch or the charge completion switch is turned on.

On the other hand, as the lever 43 turns clockwise, the lever 47 also turns clockwise integrally with the shaft 46, and the lever 48 also slides rightward in the drawing. For this reason, the locking lever 49
In order to release the engagement with the one end 50b of the right turning restriction lever 50, the restriction lever 50 turns right by the action of the spring 50c and releases the engagement with the claw portion 69a of the winding restriction 69. The end 50d turns on the hoist switch 51 which is a normally open switch.

As will be described later, the motor 52 is started up when the hoist switch is turned on, and is turned off when the motor 52 is turned off, so that the power is turned off and the terminal is short-circuited (braking). Start.

The power of the motor 52 is supplied to the slip mechanism 5
3, gear 54, gear 55, gear 57, gear 59, gear 6
1, gear 62, gear 63, gear 64, spool 6
5 is transmitted to a gear 66 integrated with the gear 5. When the film F is wound by the rotation of the spool 65, the perforation of the film F and the meshing of the teeth of the sprocket 67 cause
The sprocket 67 is driven to rotate. Here, the sprocket 67 is configured to make one rotation with respect to the feed of one frame of the film F.

With one rotation of the sprocket 67, the integral winding limit 69 also starts to rotate at the same time since the engagement between the claw 69a and the limit lever 50 has been released. During this rotation, the claw 69a pushes the one end 50a of the limit lever 50, turns it counterclockwise, engages the end 50b with the locking lever 49, and resets the state shown in FIG.

The lever 73, which is in contact with the winding completion detecting plate 70 which rotates at the same time, rotates clockwise immediately after the start of rotation, and moves to a position where the winding switch 51 is turned on.

The operation of the hoist switch 51 by the lever 73 and the timing of the operation by the limit lever 50 are configured as follows.

At the same time that the limit lever 50 is turned clockwise and disengaged from the hoisting limit 69, the hoisting switch 51 is turned off.
Is switched to ON.

When the hoisting completion detecting plate 70 rotates counterclockwise by the rotation of the sprocket 67, the lever 73 is turned clockwise, the hoisting limit 67 resets the limit lever 50, and the hoisting switch 51
Before turning from ON to OFF, the end of the lever 73 takes a position to hold it ON.

That is, after the hoisting switch 51 is turned ON by the clockwise rotation of the limit lever 50, the sprocket 67
Does not turn off until the winding complete detection plate 70 comes to the position shown in the figure and the lever 73 falls into the notch and turns left.

At one rotation of the sprocket 67, that is, at the time when the film F is fed by one frame, the hoisting switch 51 is turned off as described above, and the motor 52 stops rotating and performs rotation. Stop.

As described above, the operations from the release signal generation to exposure, shutter system charge, mirror system charge, and film winding are completed.

[Film Rewinding] In FIG. 1, when the first rewinding lever 82 is clockwise turned against illegally, the lid 84 is similarly turned clockwise via the shaft 83, and the interlocking slide lever 85 is moved. Slide to the left. The slide lever 85 rotates the lever 86 counterclockwise, and furthermore, the lever 87
The lever 73 is turned clockwise through.

After moving by a predetermined amount, the left end 85a is locked by the lever 80 to hold the position and turn on the first rewind switch 88 which is a normally open switch.

When the lever 86 is turned counterclockwise, the gear 64 is moved upward in the thrust direction, disengaged from the gear 66, and the spool 65 is in a free state.

Further, the slide lever 85 has a projection 85
Since d rotates the locking lever 49 clockwise and releases the engagement with the restriction lever 50, the restriction lever 50 is clockwise rotated by the force of the spring 50c. Therefore, the engagement with the hoisting limit 69 is released, and the sprocket 67 becomes free.

Next, the operation proceeds to the operation in the patrone room shown in FIG.

When the second rewind lever 89 is turned counterclockwise, the lever 92 integrally formed by the lever 90 with the internal force spring 91 also turns counterclockwise, and the pin 92a pushes up the gear 93 against the spring 93a. The gear 94 is engaged. In this state, the position of the lever 90 is held by the locking by the click spring 95.

The lever 90 switches the second rewind switch 96 to ON at the left end. As will be described later, when the first rewind switch 88 and the second rewind switch 96 are simultaneously turned on, the motor 97 is energized, and the gears 98 and 9 are turned on.
9, 101, 93, 94, 103 via the gear 104
Turns clockwise to rotate the film winding shaft (not shown) engaged with the fork portion 106 clockwise to start film rewinding.

As described above, at this time, the first rewind lever 74 is set, and the spool 65, the sprocket 6
Since both of them are in the free state, the film rewinding is performed smoothly.

When the rewinding of the film proceeds and the leading end of the film (not shown) comes off the film detecting pin 108, the film presence / absence switch 109, which is a normally closed switch which has been kept OFF until then, returns to ON. With this signal, the CPU stops energizing the motor 97.

Next, a reset operation for rewinding will be described.

In FIG. 2, when the rewind knob 107 is pulled up, the back cover key 110 also moves upward, the engagement of the back cover with a key (not shown) is released, and the back cover is opened. At the same time, the one end 110b rotates the lever 90 clockwise to return to the position shown in the figure, so that the engagement between the gear 93 and the gear 94 is released, the second rewind switch 96 is turned off, and the state shown in the figure is reset.

Returning to FIG. 1, after the rewinding is completed, when the release button 1 is pressed down and the half-press switch is turned on, the motor 20 operates and the charge completion detecting plate 35 makes one turn in the counterclockwise direction as described later. Therefore, the lever 47 is
To the right and kick the locking lever 80 with the slide lever 8
5 is released, and returns to the illustrated position.

[Switching of frame speed] As described above, the feed mode select dial 111 can be switched between three positions. At this time, the setting contents of each member are as follows. That is, in the high-speed continuous feeding mode, the feeding mode switches 113 and 114 are turned on, the cam 112 is turned on in the large-diameter portion, the low-speed continuous feeding mode is turned on, and in the small-diameter portion single-frame feeding mode, turned off and the large-diameter portion is turned off. The positional relationship is set so that

The difference between the operation in the continuous feeding mode and the operation in the single-frame feeding mode will be described later. Therefore, two high-speed and low-speed continuous feeding modes will be described here.

In FIG. 1, in the high-speed continuous feeding mode,
Since the lever 115 is located at the large diameter portion of the cam 112, the state shown in the figure is maintained.

When the feed mode select dial 111 is switched to the low-speed continuous feed mode from the state shown in FIG.
The small diameter portion of the cam 112 is located at a position where the cam 5 contacts. The lever 116 is integrated with the lever 118 via the internal force spring 117, and receives a leftward turning force by the spring 116a. Since the urging force is larger, the lever 116 and the lever 118 are turned clockwise.

Thus, the lever 116, the lever 118
The pins 116b and 118a respectively raise and lower the gear 24 and the gear 57 to change the gear mesh. In other words, the meshing of the gears 24b and 27 and the meshing of the gears 57b and 60 are changed. When the gears 57b and 60 are not engaged with each other due to the contact of the end faces when the levers 116 and 118 rotate clockwise, the internal spring 1
17 bends, and only the lever 116 rotates. Gear 24
Similarly, when b and 27 do not engage with each other, the lever 116 stops while being biased. Even in such a case, when the motor 20 and the motor 52 are started, the state immediately shifts to the meshing state.

As described above, the respective gear ratios of the charging system and the film feeding system are changed, and the frame speed during continuous feeding is changed.

[Operation of Film Counter Mechanism] The operation of the film counter will be described below.

As described above, when the film F is fed by one frame, the sprocket 67 makes one rotation. After passing through the gear 71 fixed to the sprocket 67 and a gear train (not shown), the one-tooth gear 122 is one rotation (counterclockwise)
I do.

When the back cover 119 is closed, the lever 120 is pushed clockwise, and the upper end Geneva gear of the one-tooth gear 122 is pressed against the gear of the counter 123. Let this advance against the bias. That is, the sprocket 67,
One rotation (counterclockwise) counts up by one tooth of the counter 123.

The counter 123 is reset by gradually counting down by the clockwise rotation of the sprocket 67 at the time of rewinding, or by opening the back cover 119 and setting the one-tooth gear 122
Is performed depending on whether the engagement between the counter 123 and the counter 123 is released.

[Operation of Multiple Exposure Mechanism] In the state where charging of the mirror system and shutter system and film winding are completed, that is, in the state of FIG. 1, the multiple exposure lever 74 is turned counterclockwise against urging. The multiple cam 76 integral with the multiple exposure lever 74 causes the lever 77 to rotate clockwise, thereby causing the lever 48 to rotate counterclockwise. The left end of the lever 78 integrated with the shaft 75 causes the lever 79 to which the left turning force is urged to turn clockwise, but when a predetermined angle is reached, the positional relationship between the two levers and the lever 79
The lever 78 is moved by the spring 74a depending on the setting relationship of the biasing force to
Frictional lock against the right turning force of

In this state, the lever 48 which has been turned to the left takes a position where its convex portion cannot interfere with the locking lever 49 when the lever 47 is moved rightward by the lever 47 described above.

When the release operation is performed thereafter, the above-described series of operations proceeds to the right rotation of the lever 47. However, since the locking lever 49 and the lever 48 are disconnected from each other as described above,
The limit lever 50 keeps the state shown in the figure. Accordingly, since the winding switch 51 does not generate an ON signal, the motor 52 does not start and the film is not fed. In other words, only the post-exposure charge is performed, and the shot frame does not move.
The first exposure of the multiple exposure is completed.

The lever 47 is moved in the latter half of the clockwise rotation.
It touches 0 and turns it counterclockwise. The lever 81 turns counterclockwise in conjunction therewith, and further turns the lever 79 clockwise. Therefore, the lever 79 is separated from the lever 78, and the lever 78 released from the friction locking is reset to the illustrated state by the return force of the spring 74a.

Therefore, since the lever 48 also returns to a position where it can be engaged with the locking lever 49, the film is wound up as specified after the next release, that is, after the second exposure (multiple exposure).

FIG. 3 shows a circuit diagram of the present invention. 200 is a well-known one-chip microcomputer unit (hereinafter abbreviated as MPU) and has an input port (IN) with a pull-up resistor.
1 to IN9) and output ports (OUT1 to OUT9). 201 is an output port (OUT1 to O
UT4) is a motor drive circuit that drives three motors 20, 52, and 97, and uses output ports (OUT1 to OU).
According to the state of T4), three motors are driven as shown in Table 1. 202 is a power supply, 203 is a PNP transistor,
204 is a first curtain magnet, 205 is a second curtain magnet, 2
Reference numeral 06 denotes a warning display LED which is turned on when the output port (OUT9) of the MPU 200 becomes H. SW1 and SW2 are switches 2 shown in FIG. 1, SW1 is a half-press switch,
SW2 is a release switch, and when the release button 1 is pressed, a half-press switch (SW1) is first turned on (ON).
Then, when further pressed, the release switch (SW2) is turned on. When SW1 is turned on, the PNP transistor 203 is turned on to supply power to the MPU 200 and the motor drive circuit 201. When each switch except the half-press switch (SW1) is turned ON, the input ports (IN1 to I1
N9) is L, and each switch is O
N is communicated. SW3 is a switch that indicates opening / closing of the back cover. When ON (ON), the back cover is open, and when OFF (OFF), the back cover is closed. This is the 125 switch in FIG. SW4 is a switch for indicating a film feeding mode.
When it is OFF, it is the one-frame shooting mode. This corresponds to the switches 113 and 114 in FIG.

FIGS. 4 to 8 are flowcharts showing the operation of the present invention. MODE1 in FIG. 4 performs a rewind operation.
MODE2 does not control the mechanism but merely turns off the power. MODE3 turns on the LED 206 to display a warning. MODE4 drives the motors 20 and 52 to set the mechanism to a releaseable state.
ODE5 feeds the film and sets it to the initial position.
MODE 6 feeds a fixed amount of film, and MODE 7 performs release when the release switch (SW2) is turned on. FIGS. 5 and 6 are flowcharts of MODEs 1 to 4, and FIGS. 7 and 8 are flowcharts of subroutines used in FIGS.

<Description of Motor 20 Driving Subroutine>
FIG. 7 shows a subroutine for determining the driving state of the motor 20, and the control of the motor 20 is completed by repeating this subroutine. The operation starts with the flag F2
It is determined whether or not 0S is set (# 601). If it is set, the flow proceeds to (# 606). If it is not set, the flag F20S is set, and the output ports (OUT1 to 4) for driving the motor 20 are set. In the fourth state in Table 1 (# 602).

Next, the drive prohibition flag F52 of the motor 52
I is set, and a time for prohibiting the drive of the motor 52 for a fixed time is set (# 602). It is determined whether the rear curtain switch 18 or the charge switch 19 is ON (# 603). F20C is set (# 604), and if OFF, F20C is reset (# 605) and the subroutine is stopped. Here, the prohibition of driving of the motor 52 for a certain time is based on D at the start of driving.
Since the inrush current of the C motor is large, motors 20 and 52
This is because if the driving starts simultaneously, the voltage drop of the power supply is too large.

If the flag F20S is set, it is first determined whether or not the drive prohibition time of the motor 52 has expired (# 606). If it has been completed, the flag F52I is reset (# 607) and the drive of the motor 52 is started. Allow

It is determined whether the motor 20 is being braked (# 608). If the motor is being braked, (# 609) is executed. If the brake is not being braked (if it is being driven), the rear curtain switch 18 or charge is performed. It is checked whether the switch 19 is ON, and when the switch F is turned ON and the flag F20C is set (the driving is continued because the switches 18 and 19 are ON), or when the flag F20C is turned OFF and the flag F20C is reset ( At the start of driving, the switches 18 and 19 are OFF and the driving is continued as it is).
0 state is not changed, and ON and flag F20C
Is reset (the switches 18 and 19 are off at the start of driving, and the switches 18 and 19 are
Flag F20 to apply the brake when it becomes F)
C is set, and this subroutine ends. OFF
If the flag F20C is set, the motor 20
Brake on At this time, if the motor 52 is OFF, the seventh state in Table 1 is selected. If the motor 52 is being driven, the eighth state in Table 1 is selected. If the brake is applied, the ninth state in Table 1 is selected.
Reference numeral 200 sets output ports (OUT1 to OUT4) and sets a brake end time.

If the brake is being applied (# 608), it is determined whether or not the brake is ended (# 609). If the time is the end time, the motor 52 is turned off to turn off the motor 20.
If it is FF, the output port is set to the first state in Table 1, if driving, to the second state, if braking, to the third state, the flag F20S is reset, and this subroutine is terminated. If it is not the end time, it simply ends.

<Description of Motor 52 Driving Subroutine>
FIG. 8 shows a subroutine for determining the driving state of the motor 52, and the control of the motor 52 is completed by repeating this subroutine. The operation starts with the flag F5
It is determined whether or not 2I is set (# 701). If it is set, driving is prohibited, so this subroutine ends (# 711). If reset, the film presence / absence switch 109 is checked (# 702). ), If ON (no film), end without doing anything (# 71
1) If OFF, check the flag F52S (# 703); if set, go to (# 708); if reset, check the film winding switch 51 (# 705). If there is, it is impossible to wind up and the process is terminated as it is (# 711).
52S is set. Furthermore, in order to drive the motor 52, the output ports (OUT1 to 4) are set to the second state in Table 1 when the motor 20 is OFF, the fifth state during driving, and the eighth state during braking. Is set and the process is terminated (# 711).

When the flag F52S is set (# 703), it is checked whether the brake is being applied (# 708). If the brake is applied, the flow proceeds to (# 709). The switch 51 is checked, and if it is ON, this subroutine ends. On the other hand, if the switch 51 is OFF, the motor 52 is braked.
The output ports (OUT1 to OUT4) are set to the third state, the sixth state if driving, and the ninth state if braking, the brake end time is set (# 707), and the processing ends.

When the motor 52 is braking (# 708), it is determined whether or not it is the brake end time (# 70).
9) Then, if it is not the end time, the subroutine ends. On the other hand, if the braking end time, the motor 52 is turned off.
In order to perform FF, the output ports (OUT1 to 4) are set to the first state in Table 1 when the motor 20 is OFF, the fourth state during driving, and the seventh state during braking, and a flag. F52S is cleared (# 710) and the process is terminated (# 711).

The modes shown in FIGS. 5 and 6 will be described.

<Description of MODE1> This is a mode for rewinding the film. First, the motor 97 is driven to start film rewinding (# 401), and the second rewinding switch 96 is checked. If it is OFF, the process goes to (# 404) to stop rewinding. If it is ON, the film presence / absence switch 109 is checked (# 403). If it is OFF, rewinding is continued because there is still film, and the switch 96 is turned on again. Is checked (# 402). If ON, it indicates that there is no film, so that the motor 97 is braked for a certain period of time to terminate the rewinding (# 40).
4) Then, the power is turned off by setting the output port (OUT8) to high (H) (# 405).

<Description of MODE2> This is a mode in which power is simply turned off without performing sequence control. That is, by turning the output port (OUT8) high (H), the power is turned off (# 406) and the process ends.

<Explanation of MODE3> This is a mode for displaying that there is an error. The output port (OUT9) is set to H for a certain period of time to turn on the LED 209 to warn the photographer (# 407). Output port (OUT
8) Set to H to turn off the power (# 408)
And exit.

<Description of MODE4> Here, the motor 2
By driving 0 and 52, the mechanism is reset to a release-enabled state. First, a motor 20 driving subroutine is executed (# 409), and the motor 20 is driven. Next, a motor 52 driving subroutine is executed (# 410), and the two subroutines are continuously executed until the motor 20 is turned off. When the motor 20 is completely charged and turned off (# 411), the motor 5
2 is determined (# 412), and if it is not OFF, the motor 52 driving subroutine is continuously executed,
When the film winding is completed and the motor 52 is turned off, the mechanism is ready for release, and the output port (O
The power is turned off by setting the UT 8) to H (# 41).
3) Then finish.

<Description of MODE 5> In this case, when the release button 1 is pressed, the film is wound around the spool and fed to a position where photographing is possible. First, it is determined whether the release switch (SW2) is ON (# 50).
1) If ON, clear the memory MD5C (#
502), a motor 20 driving subroutine is executed (# 503), and the motor 20 is driven and the sprocket 67 is set free to feed the film.
The motor 52 driving subroutine is executed (# 504). Next, if the motor 20 is not OFF, the above two subroutines are repeatedly executed. When the charging is completed and the motor 20 is turned off (# 505),
It is determined whether the motor 52 is off (# 506) and
If it is not FF, the motor 52 driving subroutine is repeatedly executed. If it is OFF, the value of the memory MD5C is incremented by 1 (# 507), and it is determined whether or not the value of the memory MD5C exceeds 3 (# 508). The state of the film counter switch 124 is determined (# 50
9) If ON (counter is less than 1) again (# 5
03), the film feed is continued by executing the motor 20 driving subroutine, and if OFF (counter is 1 or more), it is determined that the film has reached a predetermined exposing position and the output port (OUT8) is set to H. , Power off
F (# 510) and end. Here, the memory MD5
If C exceeds 3, it means that the film has been fed more than 4 frames, which is not possible with normal film feeding. Show what was not done.

<Explanation of MODE 6> Here, the operation of winding the film around the spool with the back cover opened is executed. First, when the release button 1 is pressed, the switch (SW
2) is turned on, and it is detected that this is turned on (# 51).
1) Execute the motor 20 driving subroutine (# 512)
Then, the sprocket 67 is released, and after driving is completed (# 5)
13) In order to drive the motor 52 for a certain time, the output ports (OUT1 to OUT4) are held in the second state in Table 1 for a certain time (# 514). At this time, the film is
If it is over 5, there is a certain amount of film on the spool 65
Will be wound up. Then, the output port (OUT
The power is turned off by setting 8) to H (# 515).
And exit.

<Explanation of MODE7> Here, release,
A series of operations of exposure, charging, and winding are performed. First, when the release button 1 is pressed, the switch (SW2) is turned on,
Upon detecting that this switch has been turned on (# 516),
Turn the magnets 3, 204 and 205 ON (port (OUT
5) to 7) is set to H), and the release and the raising of the mirror 10 are started, and the magnet levers of the front curtain and the rear curtain are attracted. When the release magnet lever 4 is separated from the magnet, the energization of the release magnet 3 is stopped (the port (OUT6) is set to low (L)), and the energization of the front curtain magnet 204 is stopped (port ( OUT5) to L) to start traveling of the front curtain, and when a predetermined exposure time has come, the energization of the rear curtain magnet 205 is stopped (the port (OUT9) is L) to start traveling of the rear curtain and expose. Is terminated (# 517). When the shutter speed is set to the time, since the rear curtain is mechanically held, the energization of the front curtain magnet 205 is stopped, the port (OUT8) is set to H, the power is turned off, and the processing ends. Next, after the second curtain switch 18 is turned on (# 518), the motor 20 drive subroutine is executed to charge the mechanism (# 519), and the motor 52 drive subroutine is executed to feed the film. (# 520). Until the charging is completed, that is, until the motor 20 is turned off (# 521), the two subroutines are continuously executed. Keep running. If the two motors are turned off and the mechanism is ready for release, the feed mode switch (SW4) is determined (# 523). Is set to H, the power is turned off (# 525), and the processing ends. If it is ON, it is the continuous shooting mode. If the release switch (SW2) is ON, the flow returns to (# 517), the release is performed again, and the release switch (SW
If 2) is OFF, the output port (OUT8) is set to H, thereby turning off the power (# 525) and terminating the processing.

The operation will be described below with reference to the flowchart of FIG. When the release button 1 is pressed, the half-press switch (SW1) turns on and the PNP transistor 203 turns on
Then, power is supplied to each circuit, the MPU 200 becomes operable, and the MPU 200 starts executing from (# 1) in the flowchart. If the second rewind switch 96 is OFF, go to (# 8). If it is ON, the state of the charge switch 19 or the rear curtain switch 18 is determined (# 2). Is displayed, and if it is OFF, check the X contact of the strobe (#
3) If ON, even though charging is completed, O
Since it is N, it is determined that there is an abnormality in the mechanism, and MODE2 is executed to end the processing. If it is OFF, the first rewind switch 88 is checked (# 4). If the first rewind switch 88 is OFF, a warning display of MODE3 is performed to warn that the first rewind operation has not been executed, and if ON, the film winding switch 51 is checked (# 5). ). Film winding switch 51 is OF
If F, due to the structure of the mechanism, it is abnormal as long as the first rewind switch 88 is ON, and a MODE3 warning display is performed. If ON, it is checked whether or not there is a film (# 6). . If the film presence / absence switch 109 is ON, there is no film, and there is no need to rewind.
Then, since there is a film, MODE1 is executed and rewinding is performed.

When the second rewind switch 96 is OFF, first, the rear curtain switch 18 or the charge switch 1
If the switch 9 is ON, it can be determined that the mechanism is in a state of uncompleted charging, and MODE4 is executed to complete the charging. If OFF, the X contact is checked (# 9). If the X contact is ON, the time exposure is checked (# 7). If it is time, it is determined that the exposure is being performed, and MODE2 is executed and the process is terminated.
E4 is executed to charge and reset the mechanism, thereby turning off the X contact. X contact is OFF
If there is a film (film presence / absence switch 10
9 OFF) 1 or more counter (counter switch 1
If it is 24OFF), release is possible because MODE
7 and no film (film presence / absence switch 10
9 ON), or if there is a film (film presence / absence switch 109 OFF) and less than counter 1 (counter switch 124 ON), check the state of the back cover (# 1).
2) Do it. When the back cover is opened and the counter is less than 1, MOD is used to wind the film around the spool.
E6 is executed, and when the counter is 1 or more, MODE7 is executed to perform release. When the back cover is closed and there is a film, MODE5 is executed to feed the film to a position where photographing is possible, and when there is no film, MODE7 for releasing is selected.

[Table 1]

[0129]

[Function] Detects the state of the switch set to the rewind state,
Since the rewind operation is controlled based on the detection result, even if the rewind operation is stopped due to sudden power consumption during the rewind operation, the state of the switch is determined when the switch is restarted. Then, the rewinding operation is automatically continued. Therefore, it is possible to provide a camera that is easy to use for the photographer. In addition, if the rewind operation is not accurately performed by the photographer, a warning unit is provided to notify the photographer of the rewind operation. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of a charging and hoisting mechanism according to an embodiment of the present invention.

FIG. 2 is a perspective view of a rewinding unit.

FIG. 3 is an embodiment of a circuit diagram of the present invention.

FIG. 4 shows a flowchart used in an embodiment of the present invention.

FIG. 5 shows a flowchart used in an embodiment of the present invention.

FIG. 6 shows a flowchart used in an embodiment of the present invention.

FIG. 7 shows a flowchart used in an embodiment of the present invention.

FIG. 8 shows a flowchart used in the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 20 first motor 52 second motor 18 first switch 19 second switch 51 third switch 73 first operating member 50 second operating member

────────────────────────────────────────────────── (5) References JP-A-59-143132 (JP, A) JP-A-62-38438 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G03B 17/00

Claims (3)

(57) [Claims] 1. A film is formed using a driving force from a driving source.
A camera control mechanism equipped with a rewinding device that can be operated externally and set to the rewinding state according to the operation
1st switch and externally operable, and can be set to rewind according to the operation
Functioning second switch, warning means for performing a warning operation, and the first switch and the second switch being in the rewind state.
When set to, the film rewinding operation by the rewinding device
And only one of the two switches is set to the rewind state.
If set, the rewind operation is prohibited and the
A control mechanism for a camera , comprising: control means for activating warning means . 2. The camera control mechanism according to claim 1, wherein the warning unit performs the warning operation for a predetermined time. 3. The camera control mechanism according to claim 1, wherein said warning means displays a warning.