JPH0799422B2 - Motor drive camera - Google Patents

Description

The present invention relates to a film feeding system for feeding a film, an exposure preparation system for performing an exposure preparation operation including at least a shutter charge operation other than the film feeding, and an exposure preparation operation during the exposure preparation operation. The present invention relates to a motor drive camera having a shutter for controlling the shutter, shutter control means for controlling opening and closing of the shutter, and a single motor for driving a film feeding system and an exposure preparation system.

Conventionally, in normal photographing in which an unexposed film is exposed in this type of camera, an exposure preparation operation for the next exposure (for example, shutter charging) and film feeding are simultaneously performed, and the exposed film is exposed again. It is known that during exposure photography, the clutch between the motor and the film feeding system is disengaged and film feeding is not performed, but only the exposure preparation operation is performed. The motor of this camera is
In multiple-exposure shooting, the camera rotates at the same time as during normal shooting set in consideration of driving a relatively small load such as the shutter charge system, but also driving a heavy-load film feeding system. Was there. Since the power consumption of the motor increases as the operating time increases, useless power is consumed during multiple exposure shooting.

It is an object of the present invention to provide a motor drive camera that can efficiently drive a motor during multi-exposure shooting and reduce power consumption.

In order to achieve the above object, the present invention provides a film feeding system for performing a film feeding operation, and an operation other than the film feeding operation from the initial state of the photographing mechanism for the next exposure. A first exposure preparatory operation for performing an operation to the photographing state, and a second exposure preparatory operation for performing the operation of the photographing mechanism from the photographing state to the initial state after the first exposure preparatory operation And an exposure preparation system that performs a shutter charge operation in one of the first and second exposure preparation operations, and a shutter that performs an exposure operation between the first exposure preparation operation and the second exposure preparation operation. A motor drive camera having a forward / reverse rotatable motor that also drives both the film feeding system and the exposure preparation system, wherein the motor drive camera is continuously operated after the second exposure preparation operation. Setting means for selectively setting a first photographing mode that allows the film feeding operation and a second photographing mode that prohibits the film feeding operation that is continuously performed after the second exposure preparation operation; Control means for controlling the energization of the motor and controlling the exposure operation by the shutter according to the photographing mode set by the setting means, the driving force of the motor, the film feeding system and the exposure And a transmission means for selectively transmitting to the preparatory system, wherein the motor performs a forward rotation, a stop of the forward rotation, and a reverse rotation sequentially in the order described, and a rotation operation of the previous period. A rotation operation to be performed later, which is a rotation operation in the latter period in which the reverse rotation is continuously performed, wherein the transmission unit is a mechanism that is interlocked with the motor, and is used during the rotation operation in the first period of the motor. The driving force at the time of forward rotation to the exposure preparation system to complete the first exposure preparation operation, and the driving force at the time of reverse rotation during the rotation operation of the previous term is transmitted to the exposure preparation system, A motor coupling mechanism that completes the second exposure preparatory operation; a motor that can be driven integrally with the film feeding system when the first shooting mode is set; The motor is maintained in a state of being separated from the motor connecting member, and is engaged with a part of the motor connecting mechanism approaching with the reverse rotation during the latter rotating operation of the motor during the latter rotating operation of the motor. And a feed connecting member for transmitting the driving force of the first feed mode to the film feed system, wherein the control means, when the first shooting mode is set, after the exposure operation, reverse rotation of the first rotation operation and the second rotation operation. Rotation motion of ,
The motor drive camera is characterized in that the motor is sequentially operated, and when the second photographing mode is set, the motor is caused to perform only reverse rotation of the rotation operation of the previous term after the exposure operation.

An embodiment applied to a single-lens reflex camera of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, the film winding and rewinding drive member 161 is performed by driving the take-up spool 29 and the hoisting sprout 49.
Rewinding the film 28 by driving the
A single motor 30 is used for driving and narrowing down by driving 79, raising and lowering of the holding frame 132 holding the quick return mirror, shutter charge for storing biasing force in the shutter front curtain 115 and the shutter rear curtain 115 ', and the like. It is designed to be obtained by the driving force of.

The details of each unit will be described below in accordance with the procedure of photographing.

First, when the key for locking the back cover is removed by a known means for loading the film 28, the back cover can be opened, and the part 1 of the back cover moves to the lower left in FIG.

Then, the back cover interlocking lever 3 is rotated by the urging force of the spring 2.
Left turn with the back cover as a part of the back cover. As a result, the rewind release lever 5 fixed below the shaft 4 is also turned counterclockwise, and the one end 6a of the rewind holding lever 6 is pushed. Therefore, the lever 6 is turned clockwise to release the rewinding state, and the rewinding holding lever 6 and the rewinding button 7 that has been in the raised position up to that point.
The relationship with is as shown in FIG. The rewinding state and its cancellation will be described later.

A pin 3a is planted at the other end of the back cover interlocking lever 3,
With the left turn, one arm portion 9a of the hoisting limit lever 9 which rotates around the axis 8 is pushed, and the lever 9 is turned to the right. A hoisting limit switch 10 is arranged behind the arm portion 9a, and is turned on when the hoisting limit lever 9 is turned clockwise. This switch 10 is connected to a motor control circuit 185 (Fig. 6), and when the switch 10 is ON, the motor 185 is activated when the pushbutton switch 11 at the upper side in Fig. 1 is turned ON.
30 has a circuit configuration that rotates in the direction opposite to the arrow in the figure, that is, rotates clockwise. Further, when the hoisting limit lever 9 is turned to the right, the hook 9b at the tip of another arm moves to the left in FIG. 1, and the hoisting limiter mounted on the sprocket shaft 47 so as to be able to transmit a rotational force. The engagement between the notch 12a and the notch 12a is released, and the limiting plate 12 becomes rotatable.

When the back cover interlocking lever 3 is turned counterclockwise, the pawl locking claw 13 is also turned clockwise. That is, the pin implanted at one end of the locking claw 13
13c is pushed to the left in the figure by the interlocking lever 3 that turns left, and the locking claw 13 turns right about the shaft 15 against the urging force of the spring 16. As a result, the locking portion 13a of the number counting pawl 13 is retracted to the left in the figure from the position where it is engaged with the number counting ratchet wheel 17 fixed to the lower end of the shaft 18. Then, the ratchet wheel 17, the shaft 18 to which the ratchet wheel 17 is fixed, the idle feed cam 19 and the number plate 20 fixed to the 18 are integrally rotated left by the biasing force of the spring 21. This rotation ends when the pin 22 implanted under the number plate 20 comes into contact with the stop plate 23 provided on the substrate (not shown). At this time, the letter S on the number plate 20 directly faces the index 24, indicating that the number counter is reset.

The feed ratchet wheel 17 can be engaged with another feed claw 25, and the tip end 25a thereof is pushed to the left front side in the figure by the tip end 13b of the number counting latch claw 13 that rotates clockwise. For,
The feed claw 25 is rotated counterclockwise around the shaft 27 against the urging force of the spring 26, and the claw portion 25b is retracted from the engagement position with the number-of-sheets ratchet wheel 17. Therefore, the feed claw 25 does not hinder the ratchet wheel 17 from turning left. The above is the operation when the case back is opened. When the case back is opened, the film is loaded, but the motor 30 does not rotate during this time.

Next, the operation from the loading of the film until the first frame is ready for shooting, that is, the film feeding operation by the film feeding system will be described. When the tip of the film 28 is inserted into the groove 29a of the spool 29 and the push button 100 is pushed, the push button switch 11 is turned on. At that time, the hoisting limit switch 10 has already been turned on, and the motor control circuit 185 detects this, and as described above, the motor 30 starts rotating (clockwise) in the direction opposite to the arrow in the drawing. By this rotation, the pinion 32 and the worm 58 fixed to the motor shaft 31 rotate right, and the gears 33, 59, and 60 rotate (counterclockwise) in the directions opposite to the arrows. The rotation of the pinion 32 is transmitted to the first gear 33, the second pinion 34 integrated with the first gear 33, the second gear 35 and the third pinion 36 integrated with the third gear 37, and the third gear 37. Is rotated (counterclockwise) in the direction opposite to the arrow in the figure. The reduction gear train from the pinion 32 to the third gear 37 is for obtaining the torque required for film feeding from the small motor 30.

A motor connecting portion, that is, a film feed plate 39 is fixed below the shaft 38 to which the third gear 37 is fixed.
Similarly to the above, the rotation is in the direction opposite to the arrow in the figure. Then, during this counterclockwise rotation, the projection 39a of the feed plate 39 and the feed connecting portion, that is, the hook portion 40a of the film feeding pawl 40 are engaged. Since the rotation shaft 40c of the film feeding claw 40 is embedded in the fourth gear 42, the fourth gear 42 also starts rotating in the same direction. Therefore, the spool 29 is rotated (counterclockwise) in the direction of the arrow in the figure via the known spool friction mechanism 43.
Then, the film 28 is taken up by the spool 29.

On the other hand, the rotation of the fourth gear 42 is caused by the rotation of the fifth gear 44 and the sixth gear.
Although it is transmitted as 45, it does not directly rotate the sprocket shaft 47. The situation will be described with reference to FIG. As described above, the rewinding state is released by rotating the rewinding holding lever 6 to the right, but at the end of rewinding the previously used film, the sprocket shaft 47 is generally planted on the sprocket shaft 47. The upper pin 47a and the groove 45a provided in the upper portion of the sixth gear 45 are out of phase with each other. Therefore, although there is the urging force of the sprocket shaft lowering spring (not shown), the sprocket upper pin 47a only contacts the upper surface 45b of the sixth gear 45 as shown in FIG. Therefore, the sprocket shaft 47 does not rotate with the rotation of the sixth gear 45, and the sprocket pin 48 planted in the middle of the shaft 47 also does not rotate. Therefore, the rotation of the sprocket 49, which is only vertically movable relative to the pin 48 through the groove 49a, is not controlled by the sixth gear 45. Therefore, at this time, the film 28 is moved by being wound on the spool 29, and the perforation (not shown) is engaged with the teeth 49b of the sprocket 49 to drive the sprocket 49 and the sprocket shaft 47.

However, as is well known, in the case where the same drive source works together, the spool 29 is set so as to take up more film 28 than the sprocket 49. , The sprocket upper pin 47a and the groove 45a are in phase with each other at a certain point of time and are engaged with each other.
The rotation of the gear 45 normally causes the amount of film 28 to be fed. This embodiment also operates similarly.

Returning to FIG. 1, the counting up of the number of sheets will be described. A sprocket upper gear 50 is fixed above the sprocket shaft 47, and always meshes with the numerator gear 51. The shaft 27 is planted at an eccentric position on the gear 51, and while the sprocket shaft 47 is rotating, that is, while the gear 51 is rotating via the gear 50, the feed claw 25 is shown in FIG. It reciprocates almost horizontally in the inside. At this point in time, the back cover is already closed and part 1 of the back cover interlocking lever 3 is turned to the right. Therefore, the urging force of the spring 16 causes the number counting pawl 13 to turn counterclockwise, as shown in FIG. As described above, the engaging portion 13a of the engaging claw 13 and the ratchet wheel 17 of the number of sheets are in the engageable position.

With the counterclockwise rotation of the number counting pawl 13, its tip 13b is
Since it moves to the right in the figure, the tip 25a of the feed claw 25 can move to the upper right in the figure, the feed claw 25 rotates right due to the urging force of the spring 26, and the claw portion 25b moves to the ratchet wheel of the number of sheets. It becomes a position where 17 can be engaged. For this reason, although not described in detail because it is publicly known, the gear 51 is rotated by the rotation of one frame of the film 28 of the sprocket 49 to reciprocate the feed claw 25, and the ratchet wheel 17 is toothed by the claw portion 25b. Turns right. As a result, with the film feeding, 20
Rotates from “S” to the position where “1” faces index 24.

During that time, the hoisting limiting plate 12 mounted on the sprocket shaft 47 rotates a plurality of times. At that time, since the hoisting limit lever 9 is biased in the counterclockwise direction by the spring 52, the hook 9b is rotated counterclockwise around the shaft 8 so that the hook 9b comes into contact with the outer periphery 12b of the limiting plate 12 and the notch 12a and the hook. When 9b faces each other, they may be engaged with each other, and the film skipping thereafter may be interrupted. Despite this situation, the protrusion 19a of the idle feed cam 19 that operates integrally with the number plate 20 in order to allow the idle feed up to the first frame has the protrusion 19a of the arm 9c of the hoisting limit lever 9.
It abuts and prevents its left turn. However, since the contact is released just before the number "1" on the number plate 20 directly faces the index 24, the lever 9 is rotated counterclockwise after the film 28 is fed by a predetermined amount. The hook 9b falls into the notch 12a, and the film feeding is mechanically blocked. While the total number of sheets 20 is from "S" to "1", the hoisting restriction is inactive. Therefore, the winding-up limiting switch 10 pressed by the arm portion 9a of the lever 9 is turned off, the power supply to the motor 30 is cut off by the action of the control circuit 185, and the film idling is completed here.

Here, note the function of the winding-up limit holding lever 53. The lever 53 is biased by a spring 55 in a clockwise direction around a shaft 54, and a pin 53b implanted on the lever 53.
Only when it is in contact with the concave portion 12c provided on the outer periphery of the hoisting restriction board 12, the hoisting restriction lever 9 has its tip 53a.
The tip 9d of the can be locked. The tip 53a of the lever 53 is dimensioned to lock the tip 9d of the lever 9 only when the lever 9 is rotated sufficiently to the right.

The case where the winding-up limiting lever 9 largely turns to the right is caused by the engagement between the pin 3a on the back cover interlocking lever 3 and the arm portion 9a when the back cover is opened, and the case where the intermediate lever 56 is turned to the left, which will be described later. It refers to the case where the pin 9e on the limiting lever 9 is pushed at the end thereof. Since the right turning angle of the limiting lever 9 is small when the outer peripheral portion 12b of the hoisting limiting plate 12 and the hook 9b are in contact with each other, the tip 53a is the tip 9d.
Do not engage. Therefore, the hook 9b of the lever 9 is the outer peripheral portion.
From the state of being in contact with 12b, it is possible to turn to the left without being blocked by the hoisting limit holding lever 53 and to fall into the notch 12a of the limiting plate 12. Aperture during this empty feed
79, the front curtain 115 and the rear curtain 115 ′ of the shutter, and the quick return mirror held by the holding frame 132 are not driven. Each of these will be described later in detail.

Next, the shooting operation and the winding operation following it will be described.

When the push button 100 is pushed down again in FIG. 1, the push button switch 11 is turned on. At this time, hoisting limit switch 10
Is off, the motor control circuit 185 causes the motor 30 to start rotating (counterclockwise) in the direction of the arrow in FIG. Therefore, the pinion 32 and the worm 58 fixed to the motor shaft 31 rotate. The pinion 32 has the first gear
33 on the worm 58, 7th gear 59 and 10th gear 60
Since and always mesh with each other, they start rotating in the direction of the arrow at the same time.

First, a system (hereinafter, abbreviated as "film feed system") interlocking with the engagement of the pinion 32 and the first gear 33 will be described. The rotation of the motor shaft 31 is converted into appropriate rotation speed and torque by the reduction gear train, and the third gear 37 is rotated (clockwise) in the direction of the arrow in the figure. As the third gear 37 rotates to the right, the shaft 38 to which it is fixed also rotates, and the rotation control plate 61 and the film feed plate 39 fixed to this also rotate in the direction of the arrow in FIG. 1 (right rotation). To do. A mirror raising locking claw 62 is biased in the counterclockwise direction by a spring 63 and is in contact with a locking portion 61a on the outer periphery of the rotation restricting board 61, so that the restricting board 61 rotates a predetermined amount from the state shown in FIG. When it is turned right at the corner, it is locked to prevent rotation of the regulation board 61. As a result, in a diaphragm drive system, a mirror drive system, and a shutter charge system, which will be described later, this acts as a stopper. Also axis 38
The motor connecting portion, that is, the film feed plate 39 fixed to the
Is located at a position where the projection 39a and the feed connecting portion, that is, the film, engages with the hook portion 40a of the feed claw 40 at the start of photographing, but since the feed plate 39 rotates right, the engagement is released.
The rotation is not transmitted to. Therefore, in this case, unlike the case of the film idling described above, the film is not fed because the fourth gear 42 and the following parts do not rotate.

The pin 37 fixed on the third gear 37 during the above right-hand rotation
The a pushes the arm portion 65a of the hoisting restriction release lever 65, and counteracts the action of the spring 66, and rotates the lever 65 counterclockwise around the shaft 67.
However, since the pin 68 implanted in the other arm of the release lever 65 moves in a direction away from the one end 56a of the intermediate lever 56, it does not affect the lever 56. Therefore the lever
The limit lever 9 is not rotated by 56, and winding is restricted.

Next, a system (hereinafter abbreviated as “aperture drive system”) that is interlocked with the engagement of the worm 58 and the seventh gear 59 will be described.
With the rotation of the seventh gear 59 in the direction of the arrow in FIG. 1 by the left rotation of the motor 30 (right rotation), the fixed shaft 6
9, the eighth gear 70, the narrowing cam 71, and the magnet reset cam 72 all start to rotate in the same direction as a unit. However, the rotation restricting plate 61 in the film feeding system restricts the right-handed rotation by the mirror ascending locking claw 62, so that the rotation of the motor shaft 31 is restricted via the gear train, and the shaft 69 also has a predetermined rotation angle. I can only turn right.

As soon as the shaft 69 starts to rotate right from the state shown in FIG. 1, the magnet reset cam 72 releases the pressing force of the magnet reset spring 73. Next, the tip of the squeezing cam 71
71a pushes one end 102a of the holding release lever 102, but the lever 10
2 cannot rotate (counterclockwise) around the shaft 73 planted in the diaphragm holding lever 75. It is the arm 1 of lever 102
This is because 02b is in contact with the pin 74 planted in the aperture holding lever 75. Therefore, the lever 102 rotates counterclockwise around the shaft 77 against the biasing force of the spring 76 together with the diaphragm holding lever 75.

In this embodiment, it is assumed that the diaphragm interlocking lever 79 that interlocks with the diaphragm mechanism of the lens 78 receives a downward biasing force in the drawing. The lever 79 is blocked from descending by the tip 80a of the aperture regulating lever 80, and the aperture is open at that time. The hook portion 75a is disengaged from the pin 81 planted in the aperture regulating lever 80 by the left rotation of the aperture holding lever 75, and the aperture regulating lever 80 is moved by the urging force of the aperture movement lever 79 and the spring 82 to cause the tip 80a. Can move in the descending direction (clockwise around the axis 84). As a result, thereafter, the throttle control lever 80 is rotated rightward from the state shown in FIG. 1 through the contact between the pin 83 planted at another position and the throttle cam 71, and the lift amount is gradually reduced. Following 71,
Turn right around the axis 84, and the diaphragm will be narrowed down.

The amount of light passing through the lens is measured by the light receiving device 181 shown in FIG. 6, and when the appropriate amount of light calculated based on the set shutter speed, film sensitivity, etc. is reached, the iris control circuit 182 acts to coil 85 is energized. Then, since the amateur 88, which has been attracted to the yoke 87 by the permanent magnet 86 until then, has a temporarily reduced attraction force,
It loses the urging force of the spring 89 and turns left around the shaft 91 together with the diaphragm locking claw 90 to which it is attached. And the locking claw
Since the claw portion 90a of 90 locks the enlarged gear train 93 composed of the gears 93a, 93b, 93c, etc., the aperture regulating lever 80 integrated with the gear 93c is stopped and the aperture value is set to obtain the proper exposure. To be done. The enlarged gear train 93 is installed to increase the resolution of aperture value setting and to increase the accuracy.

Next, how the system interlocked with the engagement of the worm 58 and the tenth gear 60 (hereinafter abbreviated as "shutter charge system") operates during this period will be described with reference to FIG.

As the motor 30 turns left, the gear 59 turns right and the 10th
The gear 60 starts rotating (counterclockwise) in the direction of the arrow in the figure. Then, the shaft 105 fixed to the shaft 105 and the eleventh gear 106 fixed to the shaft 105 also rotate counterclockwise. As a result, the 11th
The 12th gear 107, which meshes with the gear 106, turns clockwise and
The front curtain charge gear 109, which is integrated via 108, is also turned to the right.

The gear 109 starts to mesh with the front curtain sector gear 110 in the middle of its right rotation, and while the meshing state continues for a certain section, the gear 110 rotates counterclockwise around the shaft 112 until it reaches a portion where teeth are not formed. And the first curtain charge gear
109 and the front curtain sector gear 110 are disengaged, and only the front curtain charge gear 109 continues to rotate right. The right rotation of the gear 109 is the rotation control board 61 in the film feeding system.
And the mirror ascending locking claw 62 are engaged and the mirror stops.

On the other hand, the front curtain sector gear 110 disconnected from the charge gear 109 returns to the position shown in FIG. 1 by the biasing force of the spring 111. In this way, first the front curtain sector gear
110 turns counterclockwise around a shaft 112 erected on the front curtain arm 113, and at this time, the front curtain arm 1 provided coaxially with the gear 110
13 is pushed by a pin 114 provided at one end of the sector gear 110 and turned counterclockwise, and its hook 113a reaches a position where it can be locked by the leading blade claw 116. Separate pin 1 for sector gear 110
17 is provided to push the spring 118 as the gear 110 rotates counterclockwise. The biasing force of this spring 118 causes the front curtain claw 116 to rotate clockwise, and the amateur 119 attached to this claw 116.
Press on the yoke 120. After that, the yoke 120 and the armature 119 maintain the attracted state against the biasing force of the spring 122 by the attracting force of the permanent magnet 121. In such a state, the hook 116 of the claw 116 is opposed to the leading blade drive spring (not shown).
The engagement between a and the key portion 113a of the arm 113 is maintained, and the front curtain running preparation is completed. The front curtain auxiliary arm 123 is the front curtain arm 1.
Together with 13, it acts to support the first curtain 115.

As for the rear curtain, the same operation is performed from the operation of the twelfth gear 107 rotating in the direction of the arrow in FIG. 1 to the completion of the preparation for the rear curtain running. Is attached with a dash, and detailed description is omitted.

The operation performed as described above is an example of a known shutter charge operation, and the shutter charge is performed mainly when the aperture is narrowed down. In other words, this shutter charge fulfills the deceleration effect for precisely controlling the aperture. The above is the operation performed while the motor 30 is rotating counterclockwise.

In the process of narrowing down the above-mentioned aperture, the eighth gear 70
Since the 9th gear 124 and the 9th gear 124 are always meshed with each other, the shaft 125 is also left-handed. This axis 125 is for driving the reflex mirror, but in general, the above-mentioned light receiving device is used.
Since it is often convenient in terms of cost and component arrangement to place 181 optically rearward of the reflex mirror with respect to the lens, it is not preferable to move the mirror during sidelighting. Therefore, a time difference is provided between the narrowing down and the mirror up to raise the reflex mirror after the narrowing down.

The mechanism that satisfies this will be described below. With the counterclockwise rotation of the shaft 125, the first arm 126 fixed to the shaft 125 also rotates counterclockwise. The shaft 127 implanted at the tip of this arm 126 is also the shaft 12
The 2nd left-handed turn about 5 and rotatably attached to the shaft 127
The tip 128a of the arm 128 moves to the left from the state shown in FIG. However, the shaft 1 implanted at the base 128b of the arm 128
The movement of 29 to the left is suppressed by the enclosing portion 126a of the first arm 126, so that the second arm 128 eventually turns left about the shaft 125 integrally with the first arm 126 and is rotatable about the shaft 129. The pivoted third arm 130 does not move. This is axis 125
And each arm 126 so that the shaft 129 and the shaft 129 are in the coaxial position,
This is because the length of 128 and the shape of the enclosure 126a are set. Therefore, the shaft support 131 planted in the mirror holding frame 132
The third arm 130 is rotatably connected to the mirror holding frame 132, but the mirror holding frame 132 does not rotate about the axis 64.

However, the predetermined rotation angle required for narrowing down (almost 180 °)
After the shaft 125 is rotated only, the claw portion 133a at the tip of the leaf spring 133 fixed to the third arm 130 hooks the second arm 128 as shown in FIG.
And are in an engaged state, and thereafter act as one arm. This acts as a rod, and the first arm 126 serves as a crank with the shaft 125 as the center of rotation, and the shaft 127 serves as a crank pin to push up the mirror holding frame 132. At this time, since the enclosure 126a has an opening, the movement of the shaft 129 is not limited. That is, the holding frame 132 is not moved by the first half rotation of the shaft 125, but is pushed up by the latter half rotation. The first arm 126 is the second arm 12
8. The gear ratios of the eighth gear 70 and the ninth gear 124 are set so that they rotate until they are substantially in line with the third arm 130. That is, this is the time when the rotation restricting plate 61 and the mirror raising locking claw 62 in the film feeding system are engaged.

FIG. 5 shows the state when the mirror has finished rising. In this state, the arm 132a provided integrally with the mirror holding frame 132 turns on the mirror stop switch 134 near the completion of the raising of the frame 132. This signal causes the control circuit 185 to stop the motor 30. The motor 30 has a slip mechanism (not shown) and is capable of slipping when the rotation is stopped by an external force. This is well known as an accessory mechanism for driving a camera with a motor and is a common sense, so it is not shown.

If the state of FIG. 5 continues for too long, there is a concern that the second arm 128 and the third arm 130, which are aligned, may buckle in the direction in which the shaft 129 moves to the right in the figure. In order to deal with this, it is desirable that the leaf spring 133 be provided with a biasing force that abuts against the back surface of the second arm 128. By doing so, a frictional force is generated between the back surface of the second arm 128 and the surface of the leaf spring 133, so that this buckling can be prevented.

As described above, the aperture was stopped down from the open aperture to the desired aperture, after which the reflex mirror was retracted from the optical path, and a posture was prepared for the operation of the shutter.

When the leading curtain coil 135 is energized at an appropriate timing, the attraction force of the permanent magnet 136 is temporarily weakened, the attraction between the armature 119 and the yoke 120 is lost due to the biasing force of the spring 137, and the leading blade claw 116 rotates left. Then, since the hook 116a releases the engagement of the hook portion 113a of the front curtain arm 113, the front curtain 115 travels by the force of the front curtain drive spring (not shown). When the trailing blade coil 135 'is energized at the time when the next set shutter speed is obtained, the trailing blade 115' runs exactly as in the case of the leading blade. At the beginning or the end of the trailing curtain running, the trailing curtain switch 138, which has been OFF in the charged state up to that point, comes into contact with another arm portion 113'a of the trailing curtain arm 113 'to be turned ON.

This signal causes the control circuit 185 to act immediately or to give an appropriate time lag, and this time the motor 30 starts rotating (clockwise) opposite to the arrow in the figure. Then, the mirror returns, the aperture is opened, and each part returns to the state shown in FIG.

First, regarding the return of the mirror, when the seventh gear 59 turns left, the rotation is transmitted to the eighth gear 70 and the ninth gear 124, and the shaft 125 and the first arm 126 start turning right. Along with this, the second arm 128 and the third arm 130 are pulled downward in FIG. 1, and the mirror holding frame 132 descends from the raised state shown in FIG. Then, when the first arm 126 faces downward, the surrounding portion 126a abuts the shaft 129, and thereafter, the first arm 126
The arm 126 and the second arm 128 perform coaxial movement around the axis 125, and the holding frame 132 does not move back to the state shown in FIG. That is, when the mirror returns, the axis 12
The holding frame 132 descends in the first half of the rotation (clockwise rotation) of 5, and does not move at all in the second half.

No matter how many times the shaft 125 is turned to the right in this state, the taper portion 133b provided behind the claw portion 133a of the leaf spring 133 causes the second
Even if the arm 128 comes into contact with the leaf spring 133, the claw portion 133a is displaced and escapes, so that the third arm 130 also does not rotate and the mirror holding frame 132 does not move.

Next, the throttle is opened, but when the gear 59 is rotated counterclockwise, the throttle cam 71 is also rotated counterclockwise to gradually increase the lift amount. Therefore, the pin 83 is pushed upward, and the aperture restriction lever
80 turns left and raises the lever 79, so the diaphragm of the lens 78 is opened. When the lever 80 is rotated counterclockwise, the urging force of the spring 76 causes the diaphragm holding lever 75 to rotate clockwise, and the hook portion 75a thereof has the pin 8
Since 1 is locked, the open state of the diaphragm is maintained. The tip 71a of the squeezing cam 71 turns the end portion 102a of the holding release lever 102 as the squeezing cam 71 turns counterclockwise, but at this time, the lever 102 only turns clockwise against the spring 141, and the squeeze holding lever 75 turns counterclockwise. There is no such thing. Therefore, no matter how many times the squeezing cam 71 turns counterclockwise, the squeeze is kept in the released state.

When the aperture control lever 80 is turned counterclockwise, the enlarged gear train 93 also rotates, but in this rotation direction, the pawl portion of the aperture locking pawl 90.
The shape of 90a does not lock the gear 93a. In addition,
When the noise or load generated in this part becomes a problem, the locking claws should be taken at an appropriate time before the aperture starts returning to full after shooting.
The 90 should be turned clockwise so that it does not come into contact with the gear 93a. Further, when the gear 59, that is, the shaft 69 is rotated counterclockwise, the magnet reset cam 72 also rotates in the same direction and presses the magnet reset spring 73 during the rotation, so that the armature 88 is attracted to the yoke 87. Thus, the motor
The 30 can be rotated right after exposure to rotate the shaft 69 counterclockwise to return the mirror to the shooting optical path, return the aperture to the released state, and then continue the right rotation while maintaining that state. Is configured.

Next, the operation of the shutter charge system will be described. When the 10th gear 60 starts to rotate (clockwise) in the direction opposite to the arrow in the figure with the clockwise rotation of the motor 30 after exposure, the leading curtain charge gear 109 rotates counterclockwise and engages with the leading curtain sector gear 110. , This gear 110 is rotated right against the action of the spring 111. However, since the pin 114 implanted in the gear 110 is in the direction of moving away from the front curtain arm 113, the front curtain arm 113 does not move at this time. Similarly, the rear curtain arm 113 'does not move.

After that, leading charge gear 109 and leading sector gear 1
When the engagement with 10 is disengaged, the front curtain sector gear 110 is rotated counterclockwise by the urging force of the spring 111 and returns to the position shown in the figure. Similarly, the rear-curtain sector gear 110 also returns to the left by the action of the right-turn rear spring 111 '. As described above, the shutter charge system also has a configuration in which the right rotation of the motor 30 after exposure may be performed any number of times.

Next, the operation of the film feeding system will be described. After the exposure, when the motor 30, that is, the pinion 32 is rotated right, the reduction gear train is lightly oiled, and the third gear 37 is rotated left. At this time, the pin 37a planted in the third gear 37 also moves with it and pushes the arm portion 65a of the winding-up restriction release lever 65 to push the lever 6a.
5 turns right.

Along with this, the pin 68 planted on the lower surface of the other end of 65 pushes the arm portion 56a of the intermediate lever 56, so that the lever 56 turns left. As a result, the other arm portion 56b of the lever 56 pushes the pin 9e planted at one end of the hoisting limit lever 9, so that the lever 9 turns right, and the hook 9b at the tip and the notch of the hoisting limiter 12 are cut out. 12
The engagement with a is disengaged, and the hoisting limiting plate 12 becomes rotatable. That is, the winding restriction can be reliably released by driving the motor 30. Along with this, the tip 9d of the lever 9 is locked to the tip 53a of the hoisting limit holding lever 53, and the hoisting limit release state is held.

At the same time when the third gear 37 rotates counterclockwise, at the same time, the rotation restricting plate 61 starts rotating counterclockwise from the position where it is locked by the mirror raising locking claw 62, and the film feed plate 39 also rotates in the same direction. And the first
As shown in the figure, the protrusion 39a of the feed plate 39 and the film feed claw 40
When engaged with the hook portion 40a of No. 4, the fourth gear 42 starts counterclockwise. When the gear 42 rotates, the spool 29 rotates in the arrow direction via the friction mechanism 43. The rotation of the fourth gear 42 is also transmitted to the fifth gear 44 and the sixth gear 45, and the groove 45a
The sprocket shaft 47 also rotates counterclockwise through the engagement of the sprocket upper pin 46 with. Therefore, the film 28 advances.

Shortly after the film starts to move, the maximum outer diameter portion 12b will come into contact with the pin 53b planted in the hoisting limit holding lever 53 in place of the convex portion 12c of the hoisting limit board 12.
The lever 53 rotates counterclockwise around the shaft 54 by the action of the spring 55, and unlocks the tip 9d of the lever 9. That is, this releases the hoisting restriction release holding state. Therefore, the lever 9 turns counterclockwise by the action of the spring 52, and its hook portion 9b comes into contact with the maximum outer diameter portion 12b of the limiting plate 12.

After this, the notch 12a is opposed to the pin 53b. However, the pin 53b has a round shape, and the winding limit holding lever 53 has a right-hand rotation of a predetermined amount or more.
Since the pin 53b is restricted by the tip 9d, the pin 53b does not fit into the notch 12a and lock the rotation of the hoisting limiting plate 12.

When the winding-up limiting plate 12 rotates and the notch 12a faces the hook 9b of the winding-up limiting lever 9, they engage with each other to make the limiting plate 12 unrotatable, and subsequent winding does not proceed. This completes the winding of one frame of film. At the same time, since the arm portion 9a of the winding limit lever 9 that rotates leftward is displaced to the right in FIG. 1, the winding limit switch 10 is turned off, and the motor control circuit 185 detects this and stops the right rotation of the motor 30. Let

During this period, the sprocket upper gear 50 and the sprocket gear 51, which are fixed to the sprocket shaft 47, continue to rotate.
Along with the movement of the feeding claw portion 25 to the left in FIG. 1, the claw portion 25b feeds the number of ratchet wheel 17 by one tooth, and the advanced scale of the number plate 20 is opposite to the index 24. become.
On the other hand, when the feeding claw 25 is returned to the right, the locking portion 13a of the number counting locking claw 13 prevents the number counting ratchet wheel 17 from being reversed. Further, during the film feeding, the diaphragm drive system, the shutter charge system and the mirror drive system are idle.

The above is the description of the operation relating to shooting and subsequent film advance. Next, to take a picture, the push button 100 may be pressed again. That is, when the button 30 is pressed, the above-mentioned sequence is repeated.

Next, the rewinding operation after the filming of one film is finished will be described. When the rewind button 7 is pushed upward, the sprocket shaft 47, which is constantly urged downward, rises, and the one end 6b of the rewind holding lever 6 enters under the stepped portion 7a of the button 7 by the urging force of the spring 139. , Keep sprocket shaft 47 in raised position. Therefore, the sprocket upper pin 47a is the sixth gear 4
By escaping upward from the groove 45a of 5, the sprocket 49 and the sprocket shaft 47 can freely rotate independently of the sixth gear 45 and the gears 44 and 42 interlocked with the sixth gear 45.

On the other hand, since the sprocket upper gear 50 and the sprocket shaft 47 are integral with each other, when the shaft 47 is raised, the gear 50 is also in the raised position, and the conical shaped portion 50a provided in the gear 50 causes the rewinding interlocking first lever. Rotate 150 counterclockwise about spring 152 against spring 151. Axis 15 of this lever 150
Similarly, a rewind interlocking second lever 153 is fixedly attached to 2, and the tip end 153a of the lever 150 moves leftward in FIG.

Next, turn the rewind lever 155 about 90 ° clockwise and the shaft 1
The rewinding cam 157, which is integrated via 56, also rotates by the same angle, and the rewinding shaft 158, which is urged downward, is raised by this cam 157. The shaft 158 is vertically movably held by the pulley 159 via a pin 158a and a long hole 159a and has a rewinding fork 161 at the upper end. When the shaft 158 moves up, the fork 161 becomes a spool of a cartridge not shown. Engageable. When the cam 157 is rotated to the right, the rewind switch 162 is pressed and turned on. This signal causes the control circuit 185 to actuate the motor 30 to rotate to the right and the film feed plate 39 to rotate to the left, and the engagement between the feed plate 39 and the film feed pawl 40 is soon released. That is, when the rewind button 7 is pressed and the leading end 153a of the lever 153 moves to the left, the winding of all the films is completed, and in most cases, the film becomes impossible before the last one winding frame is reached. The projection 40b of the film feeding claw 40 is not necessarily located at a position facing the tip end 153a of the second lever 153, but if the film feeding plate 39 is turned counterclockwise by the rewinding operation, the projection 40b will be rotated within one rotation.
Is pushed by the tip 153a of the lever 153, the hook portion 40a is displaced to the right in FIG. 1, and the engagement with the projection 39a of the feed plate 39 is released. This state is shown in FIG.

On the other hand, since the third gear 37 and the rewinding gear 163 are always meshed with each other, when the gear 37 rotates left, the shaft 164 and the first pulley 165 to which it is fixed rotate right. A belt 166 is stretched between the first pulley 165 and the second pulley 158 with tension applied by a slack eliminating roller 167.
Therefore, when the first pulley 165 is rotated clockwise, the second pulley 158 also rotates in the same direction, and the vertical groove 159a provided on the second pulley 158 engages with the pin 158a to rotate the rewind shaft 159 to which the pin is attached. To do. Therefore, the spool of the cartridge (not shown) is rotated through the rewinding fork 161, and the film is rewound.

At this time, as described above, the sprocket 49 can freely rotate in the reverse direction, but the spool 29 can rotate in the reverse direction due to the slip of the friction mechanism 43, as in the conventional mechanism.
When the rewinding lever 155 is returned to the position shown in FIG. 1 when the rewinding of the film is completed, the rewinding fork 161 is lowered, the rewinding switch 162 is also turned off, and the control circuit 185 is turned off.
The motor 30 is stopped by the action of. A reverse rotation preventing claw 189 is provided for the curling force of the film 28 or for preventing the gear 42 from rotating during rewinding. The rewinding is complete. After this, open the case back and take out the cartridge.

Next, the operation during multiple exposure will be described. Since the camera is always stopped in the state where the film feeding is completed, the operation for commanding the multiple exposure is performed before the first exposure is given. When the multiple exposure lever 171 is rotated clockwise, the shaft 172 and the multiple lever 173 are also integrally rotated clockwise, and the tip 173a of this lever 173 is pin 1
Abut 74. Since the lever 173 pushes the arm portion 65b of the hoisting restriction release lever 65 during clockwise rotation, the lever 65 is rotated counterclockwise against the spring 66 and held at that position by a mechanism (not shown). Therefore, the arm portion 65a of the release lever 65 is retracted from the position where it can be engaged with the pin 37a planted in the third gear 37. Therefore, the lever 9 is not rotated rightward via the levers 65 and 56. When the multiple exposure command is issued in this manner, the hoisting limiting plate 12 cannot be rotated even after the exposure (completion of running of the rear curtain) is performed by rotating the motor to the right by a predetermined rotation angle (mirror returning step). Therefore, the clockwise rotation of the motor 30, that is, the counterclockwise rotation of the gear 37, causes the film feed plate 39 and the film feed claw to rotate.
When 40 is engaged, it is mechanically blocked and the inertia of the motor 30 prevents it from subsequently entering film feed. This is a phenomenon different from the above-mentioned shooting operation. That is, at the time of shooting, the pin 37a rotates the lever 65 clockwise in the middle of the mirror, thereby rotating the lever 9 clockwise via the lever 56,
The hoisting limiter plate 12 has been released from the locked state by the hoisting limiter lever 9.

Energization of the motor 30 is performed by the pin 37 provided on the third gear 37.
When a rotates the multiplex switch interlocking lever 176 counterclockwise around the shaft 177, the multiplex stop switch 178 is operated before the locking portion 39a of the feed plate 39 and the hook portion 40a of the feed plate 40 are engaged.
It is turned on and is cut off by the action of the control circuit 185.

In the above-described normal shooting mode, the control of the control circuit 185 causes the rear curtain switch 138 to move in relation to the shutter operation.
When it becomes N, the motor 30 starts to rotate clockwise, and the winding-up limit switch 10 is once turned on with the return of the mirror, and when it is turned off when the film feeding is completed, the power supply to the motor 30 is cut off.
However, in the multiple shooting mode, since the switch 10 remains off even when the mirror is restored, when the switch 10 is off and the switch 178 is on, the control circuit 185 acts so that the motor 30 does not operate.
Is to be stopped. Thus, the first exposure is completed.

Then, the second exposure is carried out. In this case, if the multiple exposure lever 171 is manually turned counterclockwise to return it to the original position, or if it is turned counterclockwise by a known method in connection with the first exposure, the winding limitation is performed. The release lever 65 is rotated rightward by the urging force of the spring 66 and returns to the position shown in the figure to perform the operation described in detail above. That is, after filming, the film 28 is fed by one frame and stopped. The situation is exactly the same for multiple exposures of triple exposure or more.

FIG. 6 shows the relationship between each switch and the motor control circuit 185, aperture control circuit 182, shutter control circuit 184, etc., but since these have already been described, they will not be mentioned again. Although not shown in FIG. 1, an aperture 191 operated by a lever 79, a power source 192 and a known power switch 193 which is turned on prior to photographing are arranged in a proper position of the camera in the lens 78.

The relationship between the operation of each system and the switches that limit the operation is summarized based on FIG. The push button switch 11 is on when the diagram shows a high level and off when the diagram shows a low level. The motor 30 shows a left-handed rotation when the diagram is above the reference line indicating a stop, and a right-handed rotation when the diagram is below. The diagram of the light receiving device 181 shows its output level. The coil diagram of the diaphragm control magnet 85 shows current values. The diagram of the mirror holding frame 132 shows rising and falling. The diagram of the mirror stop switch 134 is on at high levels and off at low levels. In the diagram of the front curtain 115, the direction below the reference line is the charging direction, and the reference line is the traveling completion position. This also applies to the trailing curtain 115 '. The coil diagram for the first curtain magnet 135 shows the current. This also applies to the coil 135 'for the rear curtain magnet. In the diagrams of the trailing curtain travel completion switch 138, the multiple hoisting stop switch 178, the hoisting limit switch 10 and the rewinding switch 162, a high level indicates ON and a low level indicates OFF.

Here, the photographing sequence will be summarized according to the time chart of FIG. When the film counter shows "1", the subject is determined and the switch 11 is turned on.
The counterclockwise rotation of 30 drives the diaphragm drive system and the shutter charge system. After that, the mirror drive system is driven to raise the holding frame 132 from the observation position to the photographing position. When the holding frame 132 moves up, the switch 134 turns on and the motor 30 stops. Subsequently, the front curtain 115 and the rear curtain 115 ′ charged for the exposure run, and the exciting currents of the magnets 135 and 135 ′ are turned on.

When the trailing curtain 135 has finished traveling, the switch 138 is turned on, which causes the motor 30 to start rotating clockwise. As a result, the mirror holding frame 102 is lowered and the diaphragm is opened. The motor 30 continues to rotate rightward and drives the winding system to feed one film. During this time, none of the diaphragm drive system, shutter charge system and mirror drive system is driven.
The right rotation of the motor 30 is stopped when the switch 10 is turned off. After shooting all frames, press button 7 and push pin 47a and groove 45a.
Release the engagement with, disconnect the connection between the motor 30 and the hoisting system,
The rewind coupling 161 is engaged with the cartridge. At the time of rewinding, the switch 162 is turned on and the motor 30 is rotated clockwise to store the exposed film in the cartridge. When the rewinding is completed, the switch 162 is turned off and the motor 30 stops. When the switch 178 is turned on during multiple exposure, the right rotation of the motor 30 is stopped and the subsequent steps are cut. In this embodiment, the mechanism for returning the mirror and opening the diaphragm constitutes an exposure preparation system.

[Brief description of drawings]

FIG. 1 is a perspective view of a single-lens reflex camera to which an embodiment of the present invention is applied, FIGS. 2 and 3, FIGS. 4 and 5 are explanatory diagrams of its operation, and FIG. 6 is an electric circuit diagram. FIG. 7 is a time chart diagram. [Description of symbols of main parts] 29 …… Spool 30 …… Motor 37 …… Gear 49 …… Sprocket 115 …… Front curtain 115 ′ …… Rear curtain 171 …… Shooting mode setting means 176 …… Multiple switch interlocking lever 178 ...... Multiple stop switch

Claims (1)

[Claims] 1. A film feeding system for feeding a film, and an operation other than the film feeding operation for performing an operation from an initial state of a photographing mechanism for a next exposure to a photographing state. The first exposure preparatory operation and the second exposure preparatory operation that is performed after the first exposure preparatory operation and that performs the operation of the photographing mechanism from the photographing state to the initial state are performed. An exposure preparation system that performs a shutter charge operation in one of the second exposure preparation operations, a shutter that performs an exposure operation between the first exposure preparation operation and the second exposure preparation operation, the film feeding system, and the A motor drive camera having a forward / reverse rotatable motor that also functions as an exposure preparation system, wherein a film feeding operation that continues after the second exposure preparation operation is permitted. Setting means for selectively setting one shooting mode and a second shooting mode for prohibiting the film feeding operation that is subsequently performed after the second exposure preparation operation; and the shooting mode set by the setting means According to the control means for controlling the energization of the motor and controlling the exposure operation by the shutter, and the driving force of the motor is selectively transmitted to the film feeding system and the exposure preparation system. The motor includes a forward rotation operation, a forward rotation stop operation, a reverse rotation operation in which the reverse rotation is performed in the stated order, and a rotation operation performed after the previous rotation operation. The transmission means is a mechanism that is interlocked with the motor, and performs the driving force at the time of normal rotation of the motor during the rotation operation of the previous period. The first exposure preparatory operation is transmitted to the light preparatory system to complete the first exposure preparatory operation, and the driving force at the time of the reverse rotation during the rotation operation in the previous period is transmitted to the exposure preparatory system to complete the second exposure preparatory operation. A motor coupling mechanism, which can be driven integrally with the film feeding system when the first shooting mode is set, and is kept separated from the motor coupling member during the rotation operation of the motor in the previous period. During the latter rotation operation of the motor, the driving force of the motor is supplied to the film feeding system by engaging with a part of the motor coupling mechanism approaching with the reverse rotation during the first rotation operation. And a feed connecting member that transmits the reverse rotation of the first rotation operation and the second rotation operation after the exposure operation when the first shooting mode is set.
The motor drive camera, wherein the motor is sequentially operated, and when the second shooting mode is set, the motor is caused to perform only the reverse rotation of the rotation operation of the previous term after the exposure operation.