JP2592886B2 - Motor driven camera - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a motor-driven camera that drives a plurality of mechanisms with one motor.

(Prior art)

2. Description of the Related Art In recent years, various motor-driven cameras have been proposed which execute film feeding, shutter charging, and swinging of a movable mirror using a motor as a driving source.

For example, Japanese Patent Application Laid-Open No. 57-42034 and Japanese Patent Application Laid-Open No. 59-143133 disclose a camera in which a single motor is built in a camera and the film is wound up and down by switching the clutch. ing.

Also, as disclosed in Japanese Patent Application Laid-Open No. 60-45229, a camera has been proposed in which film feeding speed and efficiency are improved by sharing and driving film winding and rewinding using two motors. .

Also, as disclosed in Japanese Patent Application Laid-Open No. 60-254028, the film speed, film rewinding, and shutter charge are increased by using three motors, and the frame speed and efficiency are improved to the ultimate level by using dedicated motors. Cameras have been proposed.

[Object of the invention]

An object of the present invention is to reduce the cost by driving at least three mechanisms by one motor, and to reduce the load caused by the driving of the three mechanisms so that a small motor can be used. It is to provide a driving camera.

[Features of the invention]

A motor, a preparation operation mechanism that uses the output of the motor as a drive source, and prepares for the next frame photographing based on rotation of the motor in a first direction; and a drive source that uses the output of the motor as a drive source. A film winding drive mechanism that winds up the film based on rotation in the second direction; a film rewind drive mechanism that uses the output of the motor as a drive source and rewinds the film based on rotation of the motor in the second direction; First clutch means for transmitting an output to the preparation operation mechanism based on the rotation of the motor in the first direction; and transmission of an output to the film winding drive mechanism based on the rotation of the motor in the second direction. A first planetary gear,
Second clutch means provided with a second planetary gear for transmitting an output to the film rewind drive mechanism based on the rotation in the second direction; and an output when the motor rotates in the second direction. And a blocking member for blocking the revolution of one of the planetary gears in the second clutch means so as to transmit only one of the film winding drive mechanism and the film rewind drive mechanism. The blocking member is characterized by a motor-driven camera that changes its position by rotating a cam member that rotates with the operation of the preparatory operation mechanism, thereby switching a mechanism that can transmit the rotation in the second direction.

Also, in a pre-winding type motor drive camera in which the film is wound up in advance by the entire frame when the film is loaded and the film is rewound for each photographing, a motor and an output of the motor are used as a drive source, and the first of the motor is A preparation operation mechanism for preparing for the next frame photographing based on the rotation in the direction of; a film winding drive mechanism that uses the output of the motor as a drive source and winds the film based on the rotation of the motor in the second direction; A film rewind drive mechanism that uses the output of the motor as a drive source and rewinds the film based on the rotation of the motor in a second direction; and the preparatory operation of outputting the output based on the rotation of the motor in the first direction. First clutch means for transmitting to a mechanism, a first planetary gear for transmitting output to the film hoisting drive mechanism based on rotation of the motor in the second direction;
A second clutch means provided with a second planetary gear for transmitting an output to the film rewind drive mechanism based on the rotation in the second direction; and in an initial state, a rotation of the motor in the second direction. And a blocking member for blocking the revolution of the second planetary gear in the second clutch means so that the output is transmitted only to the film winding drive mechanism. The first planetary gear is rotated by the rotation of the cam member in accordance with the operation of the operation mechanism, so that the output in the rotation in the second direction is transmitted only to the film rewinding drive mechanism. It is characterized by a motor-driven camera that switches so as to prevent the gear revolution.

A motor; a first planetary gear that revolves based on the output rotation of the motor; a second planetary gear that revolves based on the output rotation of the motor; and the first planetary gear that rotates in a first direction of the motor. A first camera operating mechanism that meshes with the first planetary gear by the revolution of the planetary gear; and meshes with the second planetary gear by the revolution of the second planetary gear by the rotation of the motor in the first direction. A second camera operation mechanism that operates by using the output of the motor as a drive source and that is operated by rotation of the motor in a second direction, and provided with a cam member that is rotated by the operation. A third camera, which has initially entered a neutral position of the revolution region of only one of the first planetary gear and the second planetary gear, and is based on rotation of the motor in a second direction. For movement mechanism operation Using said driving force of the cam member that, the while retracting from one revolution range of, switched to enter the neutral position of the other of the revolution region, the first of said motor
And a blocking member for selectively blocking engagement of the first or second planetary gear and the first or second camera operating mechanism during rotation in the direction of.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment shows a case where the present invention is applied to a single-lens reflex camera.

FIG. 1 shows a general arrangement of a single-lens reflex camera, and reference numeral 10 denotes a camera body. The camera body has a detachable photographing lens 1 mounted thereon. Reference numeral 2 denotes a release button, reference numeral 3 denotes a rewind button for forcibly rewinding all frames, and reference numeral 4 denotes a battery disposed at the bottom position of the camera body. The battery 4 can be easily taken out of the battery storage room by removing a member corresponding to the battery cover so that the battery 4 can be easily taken out when replacing the battery. Is configured. M1 is a motor, and this motor
M1 serves as a driving source for driving both the film winding system and the film rewinding system, and also serves as a driving source for driving the front-plate system charge mirror. Reference numeral 5 denotes a film winding drive mechanism, 6 denotes a film rewind drive mechanism, 7 denotes a mirror box drive mechanism as a front plate system as a preparatory operation mechanism, and 8 denotes a film counter mechanism.

 FIG. 2 is a perspective view of each component.

Next, each configuration will be described in detail with reference to FIG. 2 and detailed drawings for each configuration.

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

Next, the film winding drive mechanism will be described. In the figure, reference numeral 20 denotes a first pinion fixed to an output shaft below the motor M1, and 22 denotes a transmission gear that meshes with the first pinion 20. The transmission gear 22 is connected to a sun gear 26 via a connection shaft 24. doing. Reference numerals 26 to 30 constitute a planetary clutch. The sun gear 26 transmits the output of a motor M1 which can revolve by a planetary lever 30 (combined with the sun gear 26) to the film hoisting drive mechanism 5. A planetary gear 28 as a planetary gear is meshed. Reference numeral 32 denotes a transmission gear, which is disposed at a position where meshing and non-meshing are performed by the revolution of the planetary gear 28, and meshes with the planetary gear 28 by the revolving motion accompanying the counterclockwise rotation of the sun gear 26 to rotate the motor M1. Is transmitted. Further, when the motor M1 rotates in the reverse direction and the sun gear 26 rotates clockwise, the engagement between the transmission gear 32 and the planetary gear 28 is disconnected. Reference numerals 34 and 36 denote transmission gears for transmitting the rotation of the transmission gear 32. The transmission gear 36 in the form of a two-stage gear meshes with a sun gear 38 here.

38 to 42 constitute the first planetary clutch,
The small gear of the step-shaped sun gear 38 is the first planetary lever 42
The first planetary gear 40 that can revolve and move is meshed with the small gear of the sun gear 38 by friction coupling. 38,44
And 46 constitute a second planetary clutch, and the small gear of the sun gear 38 meshes with the second planetary gear 46 which can revolve by means of the second planetary lever 44 (combined with the small gear of the sun gear 38 by friction). doing.

Reference numeral 48 denotes a transmission gear for driving the spool, which is disposed at a position where the first planetary gear 40 meshes and disengages with the revolution of the first planetary gear 40, and which rotates by the revolving motion accompanying the clockwise rotation of the sun gear 38. The output rotation of the motor M1 is transmitted by meshing with the gear 40. When the motor M1 rotates in the reverse direction, the transmission is interrupted by the above-mentioned upstream planetary clutch mechanisms 26 to 30, so that the first planetary lever 42 is particularly rotated counterclockwise. Absent.

50 is a spool gear for driving the spool, and 52 is a spool for winding the film. The spool gear 50 always meshes with the transmission gear 48 and has a fixed relationship with the spool 52. (In FIG. 2, the spool gear 50 and the spool 52 are drawn apart for easy understanding of the drawing. Both are actually fixed). A spool claw 52a meshing with the perforation of the film F is provided on the peripheral surface of the spool 52.
Are formed.

On the other hand, 54 is a transmission gear for driving the sprocket, and 2
The large gear is formed in the shape of a stepped gear, and
Is arranged at a position where meshing and non-meshing are performed by the revolution of
The revolving motion accompanying the clockwise rotation of the sun gear 38 meshes with the second planetary gear 46 to transmit the output rotation of the motor M1.

56 is a sprocket gear for driving a sprocket, and 58 is a driving sprocket. The sprocket gear 56 always meshes with the small gear of the transmission gear 54, and is in a rotationally interlocked relationship with the drive sprocket 58 (in FIG. 2, the sprocket gear 56 and the drive sprocket 58 are provided for easy understanding of the drawing.
Although the mechanism for interlocking with the above is omitted, the two are actually connected by a shaft or the like so that the two can be rotated and interlocked.) The drive sprocket 58 is formed with teeth 58a that mesh with the perforation of the film F.

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

In the vicinity of the tip of the second planetary lever 44 of the second planetary clutch mechanism, there is formed a structure for disengaging the second planetary gear 46 and the transmission gear 54 and holding them in that state. This structure will be described with reference to FIG.

That is, the notch 44 is provided near the tip of the second planetary lever 44.
a, a protrusion 44b and a mountain-shaped click mountain 44c are formed. Reference numeral 60 denotes a reset lever which is supported by the swing itself by the rotation center 60a, and includes a bent rule portion 60b and a first projecting portion 60.
c and a second protruding portion 60d protruding toward the back lid side. Reference numeral 62 denotes a holding lever, which is supported concentrically with the rotation center 60a of the reset lever 60, and is swingable at a slight angle regulated by the rule portion 60b. The holding lever 62 has a pin 62a at a position corresponding to the notch 44a of the second planetary lever 44, and a click projection 62b at a position corresponding to the click mountain 44c. Reference numeral 64 denotes a holding spring fixed to the reset lever 60, which elastically presses the holding lever 62 to bring the click projection 62b into contact with the click mountain 44c. A reset spring 66 elastically presses the reset lever 60 in a counterclockwise direction (in FIG. 3). Reference numeral 70 denotes a back cover of the camera which is supported so as to be capable of opening and closing by a rotating shaft 70a, and when the back cover is in a closed state, the pushing portion 70b pushes the second projecting portion 60d. Reset lever against reset spring 66
60 is pushed and held at the positions shown in FIGS. 2 and 3 (a) and (b).

Accordingly, the second planetary lever 44 is in the state of starting film winding, as shown in FIG.
And the transmission gear 54 are meshed. Then, after the leader of the film is wound around the spool 52 by winding the film, the drive sprocket 58 is then moved to the film F.
Therefore, the rotation speeds of the second planetary gear 46 and the transmission gear 54 do not match. Therefore, in the initial stage of film winding, a force rotating clockwise (as viewed from the bottom direction in FIG. 3) acts on the second planetary lever 44 as a repulsive force, and rotates the lever 44 clockwise. Let it. At this time, as shown in FIG. 3 (b), the click projection 62b gets over the click mountain 44c, and the engagement between the second planetary gear 46 and the transmission gear 54 is cut off. In this state, the holding lever 62 is pushed toward the second planetary lever 44 by the holding spring 64, and the click projection 62b is moved to the click mountain 44c.
Is held to press the position from the top to the slope.

Then, this state (the state of FIG. 3B) is
Is held until the next opening, and thereafter, only the spool 52 (spool drive) exerts a driving force for winding the film F.

When the back cover 70 is opened as shown in FIG. 3 (c), the reset lever 60 is pressed by the reset spring 66 and swings counterclockwise, so that the holding lever 62 also swings counterclockwise. Then, the pin 62a pushes the protruding portion 44b to swing the second planetary lever 44 counterclockwise, thereby returning the second planetary gear 46 to the initial position where it can mesh with the transmission gear 54.

Next, the film counter mechanism and the film feed detecting mechanism will be described. Referring back to FIG. 2, reference numeral 80 denotes a driven sprocket, which does not interlock with the driving sprocket 58;
It rotates only following the movement of the film F. Reference numeral 82 denotes a transmission gear fixedly connected to the driven sprocket 80. Reference numeral 84 denotes a detection gear that meshes with the transmission gear 82, and feeds a film corresponding to one frame of the film (normally, 8 perforations).
Is set to rotate once. 86 is a counter feed shaft with a notch tooth 86a formed at the upper end,
It rotates in conjunction with the detection gear 84. The rotation interlock between the two is performed by the internal teeth 84a (see FIG. 4) formed in the center hole of the detection gear 84 and the external teeth 86 formed at the lower end of the counter feed shaft 86.
b (see FIG. 4).
However, the meshing between the internal teeth 84a and the external teeth 86b is set so as to be loose in the radial dimension, so that the counter feed shaft 86 can move slightly in the radial direction with respect to the detection gear 84. become. Reference numeral 88 denotes a counter gear rotatably supported by a center shaft 88a and urged to rotate clockwise by a spring (not shown).
A tooth portion 88b is formed for meshing with the a and rotating by one pitch with one rotation of the counter feed shaft 86. On the upper surface, a film frame number display 8 is provided at an interval corresponding to the pitch of the tooth portion 88b.
8c is attached. Reference numeral 90 denotes a counter reset lever which is swingably supported by a center shaft 90a. The projecting pin 90b is pushed by the pushing portion 70c when the back cover 70 is closed, and the counter feed shaft 86 is turned when the counterclockwise swing is performed. Pushing part 90 that pushes
c is formed. Reference numeral 92 denotes a spring whose center is supported by a pin 90d formed on the counter reset lever 90. One end of the spring 92 contacts the fixed pin 92a, the other end contacts the counter feed shaft 86, and When the cover 70 is closed (the state shown in FIG. 2), the counter feed shaft 86 is elastically pressed toward the center of the counter gear 88, and the upper end of the feed shaft 86 (the position of the notch teeth 86a) and the gear 88 are moved. Of the gear 88 and prevent the gear 88 from returning to the initial position. On the other hand, when the back cover 70 is opened, the holding of the counter reset lever 90 itself is released, the reset lever 90 swings counterclockwise by the urging force of the spring 92, and the pushing portion 90c moves the counter feed shaft. 86 is pushed in the opposite direction to the counter gear 88. As a result, the counter gear 88 becomes free to rotate, and the initial position (“E” as the number of film frames displayed on the display window) is displayed by a spring force (not shown).
Rotate clockwise until is located). After that,
When the back lid 70 is closed, the upper end of the counter feed shaft 86 enters the tooth portion 88b of the counter gear 88, and the gear 88 is intermittently rotated one notch by the notch tooth 86a in the addition direction. Can be sent.

Reference numeral 94 denotes a detection board, which is provided at a lower surface position of the detection gear 84. The detection gear 84 and the detection board 94 constitute a mechanism for detecting the feed amount of the film F, and a detailed structure will be described below with reference to FIGS. 4 and 5. FIG. 4 shows a view of the detection gear 84 as viewed from the back side, on which a sliding brush 85 is attached. Figure 5 shows the detection board
FIG. 9 is a view of the surface of the sliding brush 85 as the detection gear 84 rotates, showing a comb-like pattern 94a, a duty control pattern 94b, a brake control pattern 94c, and a ground. A pattern 94d is formed. The patterns 94a to 94d are connected to terminals 95 to 97, respectively. The area of the width in which the sliding brush 85 actually slides is indicated by a reference numeral 98 by a two-dot chain line. Here, terminal 96
The terminal 95 can detect a movement signal (pulse signal) during the frame feeding of the film F, and the terminal 97 can detect the duty near the frame feeding end of the film. The control range can be detected, and the brake control range at the terminal end of the frame feeding of the film F can be detected by the terminals 95 and 97. To be more specific, referring to the time chart at the time of film rewinding in FIG. 6, if a ground level signal is supplied to the terminal 96, the sliding brush is first rewinded by one frame.
A pulse signal is obtained at the terminal 95 by the 85 sliding between the comb-like pattern 94a and the ground pattern 94d.
Since the pulse signal generation interval is synchronized with the film feeding speed, if the pulse signal generation interval is shorter than a predetermined time, the film F is properly fed (both winding and rewinding). Conversely, if it is longer than the predetermined time, the battery voltage has dropped or the winding or rewinding of the film F has been completed for all frames (the winding of all the frames of the film has been completed. (The state in which the film has been wound into the patrone).

Next, the sliding brush 85 slides between the duty control pattern 94b and the ground pattern 94d, so that a ground level signal is obtained at the terminal 97. This timing is synchronized with the vicinity of the end of the rewinding (frame feed) for one frame of the film F so that the start end 94b-1 of the duty control pattern 94b is synchronized.
Is set, and the motor M1 is switched from full energization to duty pulse energization in order to decelerate, and deceleration control is performed.

Further, the sliding brush 85 is a duty control pattern.
94b, brake control pattern 94c and ground pattern 94d
, A ground level signal is obtained at both terminals 95 and 97. At this timing, the start end 94c-1 of the brake control pattern 94c is set so as to synchronize immediately before the end of the rewinding of one film frame (with an allowance for overrun), from which the motor M1 is rapidly stopped. In this case, the operation is switched to a short circuit and stop control is performed.

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

2, reference numeral 100 denotes a second pinion fixed to the output shaft above the motor M1, and reference numeral 102 denotes a two-stage gear-shaped transmission gear that meshes with the second pinion 100. 104 to 108 constitute a planetary clutch, and mesh with the transmission gear 102.
The planetary lever 108 (sun gear 10)
A planetary gear 106 serving as a second planetary gear for transmitting the output of a two-stage gear-shaped motor M1 that can revolve and revolve by means of friction coupling with the film rewinding drive mechanism 6 or the mirror box drive mechanism 7 is meshed. . Reference numeral 110 denotes a rewind gear, which is brought into a position where the planetary gear 106 meshes with the small gear of the planetary gear 106 by revolving in the first direction (clockwise rotation of the sun gear 104 by clockwise rotation of the motor M1). Are located. Reference numeral 112 denotes a rewinding fork that meshes with a known film cartridge shaft, and is connected to the rewinding gear 110 by a strong friction.

On the other hand, reference numeral 120 denotes a transmission gear in the mirror / charging drive transmission system, which revolves in the second direction of the planetary gear 106 (motor M1).
The counterclockwise rotation of the sun gear 104 due to the counterclockwise rotation of the planetary gear 106) causes the planet gear 106 to engage with the large gear. Here, 104, 106, 108 and 120 correspond to the first clutch means in the present invention, and 26, 28, 30, 32 and 10
4, 106, 108 and 110 correspond to the second clutch means in the present invention. Reference numeral 122 denotes a transmission shaft having one end fixed to the transmission gear 120, and a worm gear 124 fixed to the other end. A mirror drive gear 126 meshes with the worm gear 124 and rotates clockwise (when the motor M1 rotates counterclockwise). A mirror drive cam 128 as a cam member of the preparation operation mechanism is integrally formed on the front surface side. A brush 130 (described later) for position detection is fixed on the rear surface side. Reference numeral 132 denotes a mirror driving lever composed of two levers, and serves as a cam follower for the mirror driving cam 128. That is, the mirror drive lever 132 receives a counterclockwise rotation drive by one end portion 132a slidingly contacting the climbing cam surface 128a (see FIG. 7) of the mirror drive cam 128, and the flat cam surface 128b (the 7), the counterclockwise rotation state is maintained, and the descending cam surface 128c (the seventh
(See the figure)
The rotation (return) in the clockwise direction is permitted by making the 2a and the down cam surface 128c correspond to each other in position). The other end 132b of the mirror drive lever 132
The mirror drive is performed by receiving the swing control according to the rotation position of each cam surface of the mirror drive cam 128 described above. Reference numeral 134 denotes a movable mirror, which is a viewfinder observation position (mirror down state shown in FIGS. 2 and 7A) for reflecting subject light transmitted through the photographing lens to a not-shown finder optical system, and rotating. 7 (b), and is rotatably supported so as to obtain an exposure retract position (mirror up state shown in FIG. 7 (b)) for directing the subject light in the film direction. Reference numeral 136 denotes a support frame to which the movable mirror 134 is fixed. Rotation shafts 136a are formed at both side ends, and are supported by the rotation shafts 136a so as to be rotatable in the mirror box. 138 is a mirror pin formed on one side surface of the support frame 136, and the mirror pin 138 is in contact with the other end 132b of the mirror drive lever 132. The support frame 136 is always subjected to a spring urging force in a counterclockwise direction (mirror down direction) by a spring 140. Therefore, the mirror drive lever 132 receives a rotational drive in the counterclockwise direction when the one end portion 132a slides on the climbing cam surface 128a of the mirror drive cam 128, and slides on the flat cam surface 128b to rotate the mirror drive lever 132. The rotation (return) in the clockwise direction is allowed by maintaining the rotation state in the direction and slidingly contacting the down cam surface 128c. And this mirror drive lever 132
The other end 132b of the mirror mirror 138 receives the control corresponding to the rotation position of each cam surface of the mirror driving cam 128, and pushes the mirror pin 138 to perform the mirror up operation of the movable mirror 134 and push the mirror pin 138. Is maintained, and the pressing of the mirror pin 138 is released to allow the mirror down.

Reference numeral 142 denotes a shutter charge gear that meshes with the mirror drive gear 126 and rotates counterclockwise, and has a shutter charge cam 144 integrally formed on the surface side. In addition,
The shutter gear 142 is connected to the mirror driving gear 126.
And one-to-one transmission (reduction ratio 1.0). Here, the shutter charge cam 144 has a climbing cam surface 144a (see FIG. 7) for driving a shutter charge lever 146, which will be described later, in a counterclockwise direction, and the rotation position (charge state) of the lever 146. A flat cam surface 144b (see FIG. 7) for keeping the same and a down cam surface 144c (see FIG. 7) for allowing the lever 146 to rotate clockwise are formed.

Reference numeral 146 denotes a shutter lever formed in a substantially L-shape, which is rotatably supported by a center shaft 146a, and has a role as a cam follower of the shutter charger cam 144. That is, when the roller 146b supported at one end of the shutter charge lever 146 comes into contact with the climbing cam surface 144a of the shutter charge cam 144, the roller 146b is rotated counterclockwise, and the flat cam The rotation state in the counterclockwise direction is maintained by contact with the surface 144b, and the rotation in the clockwise direction is allowed by the arrival of the phase 146b in the phase of the downward cam surface 144c. The roller 146c supported by the operating end of the shutter charger lever 146 is controlled according to the rotation position of each cam surface of the shutter charger cam 144, thereby forming a roller in the shutter unit. Of one of the levers, the shutter operation of the shutter and the push operation of the lever for the shutter are continued to maintain the charging operation (at this time, the shutter tip blade group,
Mechanical holding of both rear blade groups at the travel preparation position can be performed. Since the shutter unit has already been filed as Japanese Utility Model Application No. 61-39629, a detailed description thereof will be omitted. ), Release of the lever for the charge and release (removal of the mechanical holding of both the leading blade group and the trailing blade group at the traveling preparation position, and thereafter the shutter is controlled by controlling the energization of the control electromagnet. Can be run).

As can be easily understood by comparing both FIG. 7 (b) and FIG. 7 (c), the mirror driving cam can be easily understood.
The mirror drive phase of the mirror drive lever 132 by the mirror drive lever 128 and the charge drive phase of the shutter charge lever 146 by the shutter charge cam 144 are completely shifted from each other. That is, as shown in FIG. 7 (c), when the shutter charge lever 144 is being driven by the shutter charge cam 144, the mirror drive cam 128 does not push the mirror drive lever 132. The movable mirror 134 enters a mirror down state. FIG. 7 (b)
When the mirror drive lever 132 is pushed by the mirror drive cam 128 to move the movable mirror 134 to the mirror up state, the shutter charge cam 144 releases the shutter charge lever 146 to release the shutter. The mechanical holding (tension) of the blade group and the rear blade group at the traveling preparation position is released.

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

A signal board 160 (omitted in FIG. 2 for simplicity of the drawing) is disposed at a position on the back side of the mirror driving gear 126 where the brush 130 can slide. On the signal board 160, three position detection patterns, that is, a ground pattern 161, an operation end detection pattern 162, and an overrun detection pattern 163 are formed by vapor deposition or the like. FIGS. 8A and 8B show the relationship between each of the patterns 161 to 163 and the brush 130 fixed to the back surface of the mirror driving gear 126.
This will be described with reference to FIG.

Here, the sliding portion 130a of the brush 130 is divided into a comb-like shape to enhance the safety of contact with the patterns 161 to 163 on the signal board 160. Note that the actual sliding position of the sliding portion 130a, that is, the contact point is a position 130b on a line slightly inside the brush tip.

FIG. 8 (a) shows the phase of detecting the completion of shutter charge corresponding to FIG. 7 (c).
130 rotates clockwise as indicated by the arrow in response to the clockwise rotation of the mirror drive gear 126, and in the state of FIG. 162, and the potential of the connector portion (land portion) 162a of the detection pattern 162 changes to the ground level, thereby detecting the completion of the shutter charge. To explain this detection in more detail, a ground level signal is supplied to the connector portion (land portion) 161a of the ground pattern 161.
The output of the second connector section 162a is supplied to the camera control circuit. Then, when the brush 130 is at a position before the state of FIG. 8A (can be understood by replacing the brush 130 with a position rotated counterclockwise from the position of FIG. 8A). In other words, the sliding portion 130a of the brush 130 is in contact only with the ground detection pattern 161, and the detection pattern 162 has not yet changed to the ground level. Then, from here, the mirror driving gear 126 further rotates clockwise, and at the same time, the brush 130 also rotates clockwise, and when the brush 130 (conductive material) reaches the position shown in FIG. Came into contact with the pattern 162,
The potential of the operation end detection pattern 162 changes to the ground level via the brush 130, and the camera control circuit detects the shutter charge completion state, and controls the rotation of the motor M1 to stop.

On the other hand, FIG. 8 (b) shows the phase in which the mirror up completion corresponding to FIG. 7 (b) is detected, and the brush 130 turns to the arrow in response to the clockwise rotation of the mirror driving gear 126 as well. As shown in FIG. 8 (a), the sliding portion 130a rotates clockwise from the state shown in FIG. The detection pattern 162 is switched to non-contact, and the completion of the mirror-up is detected by changing the potential of the connector portion (land portion) 162a of the detection pattern 162 from the ground level to the initial level (normally H level). This detection will be described in further detail. It is understood that the brush 130 is replaced by a position just before the state shown in FIG. 8B (a position where the brush 130 is rotated counterclockwise from the position shown in FIG. 8B). Is possible), the sliding portion 130a of the brush 130 is in contact with both the ground pattern 161 and the operation end detection pattern 162, and the output of the connector portion 162a of the operation end detection pattern 162 is still output from the camera control circuit. Is supplied with a ground level signal. Then, from here, the mirror driving gear 126 further rotates clockwise, and at the same time, the brush 130
When the brush 130 also rotates clockwise and reaches the position shown in FIG. 8B, the brush 130 shifts to a non-contact state with the operation end detection pattern 162, and the potential of the operation end detection pattern 162 changes from the ground level. The level changes to the initial level, and the camera control circuit detects the mirror up completion state, and controls the rotation of the motor M1 to stop.

FIGS. 2 and 7 show a switching mechanism of the above-described film winding, rewinding, mirror driving and charging mechanisms.
Description will be made with reference to the drawings.

Reference numeral 170 denotes a switching lever as a blocking member, which is indicated by a two-dot chain line in the figure (to avoid complicating the figure).
The switching lever 170 is swingably supported about a center shaft 170a, and has a first regulating projection 170b at an upper end and a second regulating projection 170b at a lower end.
A regulating protrusion 170c is formed. A spring 172 urges the switching lever 170 to swing clockwise. A tensioning lever 174 is swingably supported on the switching lever 170, and has a latch claw 174a at one end and a protrusion 174b at the other end. Reference numeral 176 denotes a spring for urging the tensioning lever 174 counterclockwise, one end of which is locked by the switching lever 170, and the other end of which is locked on the tensioning lever 174. In the initial state (see FIGS. 2 and 7A), the latch pawl 174a of the tensioning lever 174 is locked by a tensioning projection 170d formed on the switching lever 170, and the urging force of the spring 176 is applied. Accordingly, the locking is continued. On the other hand, the protruding portion 174b of the tensioning lever 174 is located within the movement trajectory of the pushing protruding portion 132c formed on the mirror driving lever 132, and as shown in FIG. The mirror drive lever 13
When 2 swings counterclockwise, the projection 174b is pushed by the pushing projection 132c, and the tensioning lever 174 swings clockwise to release the tension. In this state, the switching lever 170 swings slightly clockwise to the position shown in FIG.

178 is a reset lever (second
FIG. 9, FIG. 9), in which a protruding portion 178a is formed at one end and a pushing protruding portion 178b is formed at the other end. This reset lever 17
8 is oscillated clockwise by a strong spring 180.
The strong spring 180 is set to have a stronger spring force than the spring 172 for urging the switching lever 170 to swing.
Therefore, when the back cover 70 is closed, the reset lever 178 is held in the state shown in FIGS. 2 and 9 (a) by the protrusion 178a being pushed by the pushing protrusion 70d.
Is allowed to swing clockwise. However, the back lid 70
When the push is released by the opening of the reset lever 178
Swings counterclockwise. At this time, the switching lever 170, which has already swung clockwise by the spring 172, is swung counterclockwise against the spring 172 to return to the initial state shown in FIG. Let it return. When the switching lever 170 returns to the initial state, the tensioning lever 174 is connected to a guide projection 170e having a cam surface formed on the back side of the switching lever 170 by a pin 174c formed on the lever 174. By being guided,
The latch pawl 174a is guided to be locked by the tensioning projection 170d. After this, even if the back cover 70 is closed and the reset lever 178 is swung again,
70 is held in the initial position.

The role of the switching lever 170 will be described with reference to FIGS. 9 and 10.

When the switching lever 170 is at the initial position shown in FIGS. 2 and 7A, the first regulating projection 170b at the upper end enters between the planetary gear 106 and the rewind gear 110 (FIG. 9). (See (a)), and the second regulating portion 170c at the lower end is a planetary gear.
It is separated from between the transmission gear 28 and the transmission gear 32 (see FIG. 10 (a)). Therefore, in this state, the rotation of the motor M1 in the clockwise direction allows the planetary gear 28 to revolve in the direction meshing with the transmission gear 32 and perform film winding.However, the planetary gear 106 rotates in the direction meshing with the rewind gear 110. Revolution is the first
The film is prevented from being unwound by the restriction (the center shaft 106a of the planetary gear 106 abuts on the first restriction portion 170b during the revolution) by the restriction portion 170b. However, the rotation of the motor M1 in the counterclockwise direction is not affected by the first regulating portion 170b,
The planetary gear 106 can revolve in a direction in which the planetary gear 106 meshes with the transmission gear 120, whereby mirror drive and charge drive are performed.

On the other hand, when the switching lever 170 swings clockwise as shown in FIGS. 7 (b) and 7 (c), the first regulating projection 170b at the upper end of the planetary gear 106 and the rewind gear 110 9 (b) and 9 (c), and the second restricting portion 170c at the lower end enters between the planetary gear 28 and the transmission gear 32 (FIGS. 10 (b) and (b)). c)). Therefore, in this state, the rotation of the motor M1 in the clockwise direction allows the planetary gear 106 to revolve in the direction in which it meshes with the rewinding gear 110, thereby performing film rewinding. However, the planetary gear 28 is in the direction in which it meshes with the transmission gear 32. Is prevented (the center shaft 28a of the planetary gear 28 abuts on the second regulating portion 170c while revolving) by the second regulating portion 170c, thereby preventing film winding. Even in this state, the planetary gear 106 and the transmission gear 120 can mesh with each other by the revolution of the motor M1 by counterclockwise rotation.

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

In the figure, CPU is a micro computer, and BAT is a battery. SW1 is a power switch for turning ON the first stroke pressing of the release button 2 (see FIG. 1), via a diode D _SW1 and the resistor R ₂ ON the transistor TR _BAT by ON of the power switch SW1, the circuit Power supply to is started. The output of the power switch SW1 is supplied to the input port SW1 of the microcomputer CPU. Transistor TR _BAT also through the diode D _OS and resistor R ₂ by a constant time operation accompanied Wanshiyotsuto circuit OS to ON (closed) described later back cover switch SW _BP is turned ON. When the back cover is closed, the transistor TR _BAT is turned on.When the camera is loaded with the film and the back cover 70 is closed, the film loading and the film are wound in advance for all frames.
The purpose is to supply power to the microcomputer CPU in order to control the so-called preliminary winding system.
The transistor TR _BAT is a micro computer CPU.
There the output port VON becomes operational state if a H, is held via the inverters I ₁ and a resistor R ₂ to the ON state.

In the figure, REG is a regulator, which is connected to the collector output of the transistor TR _BAT and supplies a stable constant voltage V _CC to each circuit (in the figure, the constant voltage V _CC is the input port V _CC of the micro computer CPU and the photometry). This is supplied to the analog circuit MET that performs the calculation.) MET is an analog circuit that performs a photometric calculation, calculates Bv-Av between subject brightness information (Bv) obtained by a photometric sensor SPC and a resistance R _AV corresponding to preset aperture value information (Av), and outputs BV. It is configured to input information as ₁ out to an input port AD _IN1 as an AD conversion input of the microcomputer CPU. R _ISO is a resistor corresponding to the film sensitivity information Sv, and inputs information to the input port AD _IN2 of the microcomputer CPU. V _BAT is a battery voltage of the battery BAT, and is supplied to the input port AD _IN3 of the microcomputer CPU and a transistor bridge circuit MD described later.

SWPT _IN is a film loading detection switch, which is composed of, for example, a leaf spring disposed in a camera patrone room,
When the film cartridge is loaded in the cartridge chamber, the leaf spring is pressed to turn on the switch to detect the film loading.The output of this switch is supplied to the input port PT _IN of the micro computer CPU. I have.

SWBP is a back cover switch, which is turned on when the back cover 70 (see FIG. 2) is closed, turned off when the back cover 70 is opened, and connected to the micro computer.
The output is supplied to the input port BP of the CPU and the one-shot circuit OS.

SW _CMSP is the brush 1 on the signal board 160 (see Fig. 8).
This means a switch associated with the sliding between 30 and the operation end detection pattern 162. The time when the output changes from L to H is the mirror up (shutter charge release) phase, and the time when the output changes from H to L is the mirror. Down (shutter charge) phase, this output is a micro computer CP
It is supplied to the U input port CMSP.

SW _FLSP and SW _FLDY mean a switch for detecting the rotation of the detection gear 84 (see FIGS. 2 and 4). The switch SW _FLSP is connected to the output of the terminal 95 of the detection board 94 (see FIG. 5). A corresponding switch output is supplied to the input port FLSP of the microcomputer CPU, and a switch SW _FLDY supplies a switch output corresponding to the output of the terminal 97 to the input port FLDY.

SW2 is ON when release button 2 is pressed for 2nd stroke
Release switch, and outputs its output to the input port SW.
Supplying two.

The LED is a light emitting diode for warning, which is installed near the field of view of the viewfinder or on the exterior of the camera.
Output port LED of microcomputer CPU via the R _BC
Is connected to

MD is a well-known transistor bridge circuit, and a motor
M1 (see FIG. 2) is controlled as instructed by the microcomputer CPU, and is connected to output ports PM0 and PM1.

MG1 is a magnet for the shutter tip blade group, and is configured to start running of the shutter tip blade group by energization.Specifically, by setting the output port PS0 of the micro computer CPU to H, the resistance R _MG1 is set. The transistor TR _MG1 is turned on via the power supply to turn on the magnet MG1. MG2 is a magnet for the rear blade group of the shutter.
It is configured to start the running of the rear group of shutters by energization.Specifically, by setting the output port PS1 to H, the transistor TR _MG2 is turned on via the resistor R _MG2 to energize the magnet MG2. Will be

DATE is a publicly known date imprinting device, which imprints data such as date and day of the week on the film surface from the back cover 70 side, and this imprinting operation is performed by setting the output port DTON of the micro computer CPU to H. Done.

 In the drawing, GND means ground.

Next, the operation of the camera control circuit will be described with reference to the flowcharts of FIGS.

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

[Step 2] Set the output port V _ON to H (V _ON = 1) and set the transistor
The power holding control is performed by keeping TR _BAT ON.

[Step 3] It is determined whether or not a film is loaded in the camera based on the output of the film loading detection switch SWPT _IN. If a film is loaded, the process proceeds to Step 4, and if the film is not loaded, the process proceeds to Step 5.

[Step 4] Whether or not the back cover 70 is closed is determined based on the output of the back cover switch SWBP, and if it is closed, Step 7 is performed.
If so, proceed to the RELEASA routine of step 50.

[Step 5] In the same manner as in Step 4, the back cover switch SWBP is detected and the back cover is detected.
If 70 is closed, go to step 6; if it is open, go to the RELEASA routine of step 50.

[Step 6] The microcomputer CPU has a built-in EEPROM (non-volatile memory). One bit in the EEPROM is EF
Use it as a P flag, and set 1 to this flag.
As will be described in detail in a sequence described later, the EFP flag is used as a determination flag for determining whether or not to execute the preliminary winding when the back cover 70 is closed.

After setting 1 on the EFP flag, REL at step 50
Proceed to EASE routine.

[Step 7] If 1 is set in the EFP flag described above (EFP = 1)
If the initial state (EFP = 0), go to step 8
Go to RELEASE routine of 0.

[Step 8] The voltage VBAT of the battery _BAT is checked based on the analog input of the input port _ADIN3 (AD conversion input). The voltage _VBAT is AD-converted by the AD converter in the micro-computer CPU. If the voltage is lower than the predetermined voltage, the camera may malfunction, so the process proceeds to step 9 and exceeds the predetermined voltage. If there is no problem, go to step 10.

[Step 9] With the output port LED set to H, the warning light emitting diode LED is turned on to indicate that the battery voltage V _BAT has dropped and the camera cannot be operated. Note that this command also includes a function of automatically turning off the light emitting diode LED by setting the output port LED to L again after a predetermined time. Then, the process proceeds to the STOP routine of step 47.

[Step 47] At the end of every sequence, this routine is always passed.

The output port V _{ON is set} to L (V _ON = 0), whereby the transistor TR _BAT is turned off and the regulator REG is also deactivated, thereby turning off the circuit power supply.

Also wait for time. Usually a microcomputer
The power supply Vcc is turned off while the CPU waits for this time.

Note that the power supply Vcc may still exist even after the waiting time has ended. That is when the transistor TR _BAT is turned on due to factors other than the output of the output port V _ON , specifically when the one-shot circuit OS is operating by turning on the power switch SW1 or turning on the back cover switch SWBP. It is. In such a state, the process returns to step 1 as a start address and executes a new sequence.

[Step 10] the film is loaded, the back lid is closed, EFP Furatsugu is 1, further when is at a level the battery voltage V _BAT is no problem in operation performs winding preliminary film.

That is, the drive sprocket 58 and the spool 52 are driven by rotating the motor M1 forward (clockwise rotation in FIG. 2), and the film leader is first spooled.
52 is loaded, and then preliminary winding control is performed to wind up the film for all frames.

Here, the operation control of the motor M1 by the micro computer CPU is performed as shown in the following table.

Also, the timer TMR is reset (TMR = 0). This timer TMR is used to detect a state in which the film cannot be accurately loaded, or a state in which the preliminary winding of all the frames of the film is completed and the film is in a state of being stretched. If the film does not move, and if the film has not moved by the predetermined amount within the time set by the timer TMR, it can be determined that the above-mentioned two states have occurred.

In addition, registers VR and VNR for a battery voltage check, which will be described later, are initialized (VR = 0, VNR = 0).

Also, the register E _COUNT of the EEPROM (non-volatile memory) in the micro computer CPU is initialized (E _COUNT =
0). The register E _COUNT is used as an electric film counter.

[Step 11] The state of the back cover switch SWBP is checked to determine whether or not the back cover 70 has been opened during the preliminary winding. When the back cover is opened, the process proceeds to step 12, and when the back cover is kept closed, the process proceeds to step 13.

[Step 12] If the back cover 70 is opened during the preliminary winding, the motor M1 is stopped to stop the preliminary winding, and
Proceed to the STOP routine. When the back lid 70 is closed again,
Since the EFP flag is not reset and still stands at 1,
The program proceeds from START in step 1 to step 1.
The preliminary winding operation of 0 is executed again. However, register E
_{Since COUNT} is reset to 0, R in step 50 described later
Shooting in the film area of the preliminary winding section performed up to the present in the ELEASA routine can be automatically prohibited.

[Step 13] The state of the input port FLSP of the micro computer CPU is checked whether or not the film has been moved by preliminary winding. If there is a change in the supply signal to the input port FLSP, the process proceeds to step 14; otherwise, the process proceeds to step 22.

[Step 14] Since the film is moving due to a change in the supply signal to the input port FLSP, the timer TMR for detecting the stop of the film is initially reset (TMR = 0).

[Step 15] Add the contents of the register VR to the value AD _IN3 obtained by digitally converting the analog voltage of the input port AD _IN3 for battery voltage detection by the AD converter in the microcomputer CPU, and store it in the register VR again. Yes (VR = VR + A
D _IN3 ). Since the resist VR is initially reset by the step 10, the voltage value is added each time the supply signal of the input port FLSP changes by the step 13, and as a result, it is stored again in the register VR.

In addition, the contents of the register VNR are incremented by one ( _INC
VNR). As will be described later, the number of additions of the voltage value added to the register VR is represented in the register VNR.

[Step 16] Check the status of input port FLDY. When an H-level signal is supplied to the input port FLDY, that is, during a period other than the brake control section and the duty control section of the brush 85, the process returns to step 11, while an L-level signal is supplied to the input port FLDY. That is, in the brake control section and the duty control section, the process proceeds to step 17.

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

[Step 17] Check whether the supply signal to the input port FLSP is H or L. When the signal is at the H level, go to step 18;
Proceed to 19.

Now, referring to the time chart of FIG. 6, the signal of the preliminary hoisting operation changes with time from the right side to the left side. If the operating state reaches the right side of the brake control section, steps 13, 14, The flow will proceed with 15, 16, and 19.

[Step 18] When the brush 85 enters the duty control section from the brake control section, the supply signal to the input port FLSP changes from L level to H level, and in this state, the register E _COUNT as an electric film counter is set to 1 Increment,
Then, the process returns to step 11. This means that the register E _COUNT is incremented by one when the brush 85 moves from the brake control section to the duty control section during the preliminary winding operation,
Mechanical counter (counter gear 88)
And will be counted independently.

[Step 19] Obtain the average value of the voltage in step 15 (V = VR ÷ VN
R).

This is when the brush 85 enters the brake control section,
Each time the supply signal to the input port FLSP changes up to that time, the power supply voltage obtained by calculation (VR = VR + _ADIN3 ) is averaged, and when the battery voltage _VBAT becomes unusable, the following steps are taken. Stop driving the motor M1.

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

[Step 20] It is checked whether the voltage V obtained in step 19 is higher than a predetermined value M. If the voltage V is higher than the predetermined value M and there is no problem in the operation of the camera, the process returns to step 11;
If the voltage is equal to or less than the predetermined value M and the battery BAT is determined to be unusable, the process proceeds to step 21.

At the initial time of the preliminary winding, the influence of the power supply noise increases. However, if the register VNR is not equal to or longer than the predetermined time, the process automatically returns to step 11, so that no problem occurs.

[Step 21] The motor M is stopped to stop the preliminary winding operation, the warning light emitting diode LED is turned on, and then the process proceeds to the STOP routine. In this case, if the power is turned on again,
Or, if you replace the battery BAT with a new one,
Since the content of the ROM has been stored, the preliminary winding operation is performed again.

[Step 22] If there is no change in the supply signal to the input port FLSP in Step 13, the state of the timer TMR is checked and the predetermined value K
If not, return to Step 11 and return to Step 1.
The routines 1, 13, and 22 are repeated. On the other hand, if the supply signal does not change even if the predetermined value K is counted, the process proceeds to step 23.

As a discrimination value "3" as the [step 23] value, the register E value at greater than 3 _COUNT as an electrical film counter proceeds to step 24 it is determined that the normal, to the spool 52 when the 3 following Proceed to step 12 as loading failure and stop the motor M1.

When the film is loaded onto the spool 52 by the preliminary winding operation, the entire film can be wound, and the film is stretched in that state.
Proceed to the routine that branches to 23. However, the film does not move even when the film is not properly loaded and the film cannot be loaded onto the spool 52 in the initial stage of the preliminary winding, so that the process branches from the step 22 to the step 23 as in the case of the above-described thrust. The routine will proceed. Step 23 is intended to determine in what state the film does not move. That is, when the register E _COUNT is larger than 3, it is determined that the film cannot be moved due to the strut (normal),
If the register E _COUNT is 3 or less, it is determined that the film cannot be loaded onto the spool 52 and the film does not move (abnormal).

Note that step 12 cannot be performed because loading cannot be performed.
When the motor M1 is stopped by proceeding to, the photographer can determine an abnormal state by a mechanical film counter (counter gear 88), and can load the film again.

[Step 24] Reset the EFP flag used as a judgment flag for determining whether or not to execute the preliminary winding (EFP =
0). Therefore, in the next sequence, the flow branches to step 50 in step 7, and the routine does not shift to the above-mentioned preliminary winding routine.

[Step 25] Since the preliminary winding has been normally performed, the motor M1 is stopped to end the preliminary winding operation.

[Step 26] Counter gear 88 as a mechanical film counter
And register E as an electrical film counter
The phase of _COUNT is adjusted so as to add or subtract at the switching point between the brake control section of the brush 85 and the duty control section.

Here, consider a state in which the brush 85 slightly shifts from the brake control section to the duty control section at the end of the preliminary winding operation (film tension). in this case,
Finally, the mechanical and electrical counters are each incremented by one at the switching point. However, when the driving (energization) of the motor M1 is stopped, the film may slightly return to the cartridge side due to the tension, and the driven sprocket 80 may be slightly angularly rotated in the rewinding direction. At this time, if the position of the brush 85 returns to the brake control section, the counter gear 88 as a mechanical counter is intermittently fed (reduced by 1) in the rewind direction by one frame, but the register E as an electric counter is shifted. _COUNT is overlooked, and one count error occurs between the two. As a result, if the photographing is performed while rewinding the film thereafter, the photographing will be executed even to the frame which cannot be photographed, that is, the photosensitive portion in the preliminary winding.

Thus, step 26 to 30 by matching the value of the register E _COUNT in the final pre-winding the counter gear 88, a routine that aims to solve in advance the above problems.

In step 26, the supply signal to the input port FLDY is determined. If L, the process proceeds to step 27, and if H, the process proceeds to step 31.

[Step 27] The supply signal to the input port FLSP is determined. If the signal is H, the process proceeds to Step 28; if the signal is L, the process proceeds to Step 31.

[Step 28] Waiting for time. A sufficient time required for the film to return to the patrone direction by the film tension is set.

[Step 29] After waiting for the time in step 28, re-enter the input port
Check the status of the supply signal to FLSP. Where input port FL
If the supply signal to SP remains H and there is no change,
If it is determined that the above-mentioned phenomenon has occurred (the mechanical counter has been rotated in the rewinding direction by one frame due to the film tension), the flow proceeds to step 30.

[Step 30] The value of the register E _COUNT as an electric film counter is decremented, that is, decremented by 1, and the mechanical film counter and the electric film counter are adjusted.

[Step 31] Reverse the motor M1. The reverse rotation of the motor M1 (counterclockwise rotation in FIG. 2) causes the planetary gear 106 to rotate.
Is meshed with the transmission gear 120 of the mirror drive / charging drive system to rotate the mirror drive gear 126 and the shutter charge gear 142 to release the holding of the initial position by the tensioning lever 170 and swing the switching lever 170. (Transition to FIG. 7 (c)). Thus, when the motor M1 rotates forward again thereafter, the output is transmitted only to the film rewinding system.

[Step 32] Looking at the state of the supply signal to the input port CMSP, the process proceeds to step 33 when the level changes from the L level in the initial state to the H level.

[Step 33] As the motor M1 continues to rotate in the reverse direction, the process goes to step 34 when the supply signal to the input port CMSP changes to the L level again.

[Step 34] Stop the motor M1 once. Steps 32 and 33 are motor M
This is a step for detecting the end of the empty charge due to the reversal of 1.The phase in which the signal supplied to the input port CMSP is switched from L level to H level indicates that the mirror-up and shutter charges have been released, and the H-level The phase switched to the L level indicates a mirror-down shutter charge. Therefore, at the time when the process reaches the step 34 through the steps 32 and 33, one empty charge has been performed.

Next, the motor M1 is rotated forward again. However, at this time, the output of the motor M1 is transmitted to the film rewinding system by the swing of the switching lever 170. That is, the planetary gear 106 meshes with the rewind gear 110, and the rewind gear 110 is driven by the motor M1.

[Step 35] Initially reset the contents of the register P _COUNT (P _COUNT =
0).

[Step 36] In the initial stage of film rewinding, the state of the supply signal to the input port FLSP is determined in order to see the position of the brush 85.
If it is in another section (for example, a duty control section), it becomes H, and the process proceeds to step 37.

[Step 37] The position of the brush 85 is also determined by the supply signal to the input port FLDY. In the case of H (the brush 85 is in a state other than the brake and duty control section), the process proceeds to step 40.
In the case of L (when it is determined that the brush 85 is in the duty control section together with the determination in step 36), step 38
Proceed to.

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

The time chart shown in FIG. 6 advances from the left to the right during the film rewinding operation.

[Step 39] The flow waits until the supply signal to the input port FLDY becomes H (the brush 85 is located in a period other than the duty and brake control section), and then proceeds to step 40.

[Step 40] Looking at the state of the input port FLSP, if there is a change in the supply signal, proceed to step 41, otherwise proceed to step 42.

[Step 41] The value of the register P _COUNT that has been reset initially is incremented by one, and the process returns to step 40 again.

[Step 42] Looking at the state of the input port FLDY, if the supply signal is H, the process returns to Step 40, and if it is L, the process proceeds to Step 43.

Until step 40 to 42, are intended to store the number of signal input ports FLDY is supplied to the input port FLSP between H (interdigital pattern 94a shown in FIG. 5) in the register P _COUNT.

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

In the routine of this embodiment, when the preliminary winding operation is completed, the phase of the exposure frame of the film and the rotational position of the driven sprocket 80 (that is, the rotational position of the brush 85) are adjusted.
The film is designed to be rewound in advance. However, if the rewind amount is small, when the film is cut from the film cartridge in the steps of the film development process,
It can be expected that the exposure (photographing) frame may be reached. This step 43 is enough to ensure that no problems occur,
The purpose is to rewind the film. That is, the amount from the initial state of film rewind to the time when the brush 85 reaches the duty control section is determined by replacing the amount with the number of comb tooth-shaped patterns 94a (FIG. 5) actually sliding on the brush 85. If it is smaller than the predetermined amount M, it is determined that the rewinding amount is too small, and the film is rewound by another frame before the actual shooting.

[Step 44] In order to keep the overrun from the start of the brake control until the motor M1 actually stops, the motor M1 is duty-controlled just before the brake section. Since the duty control of the motor itself is publicly known, a detailed description is omitted.
This means that the motor M1 is energized in an alternating pulse shape without full energization to lower the effective voltage and apply braking.

[Step 45] While the brush 85 is moving in the duty control section, the duty control of the motor M1 is performed, and it is determined that the motor has entered the brake control section by the change of the supply signal to the input port FLSP to L. At this point, the process proceeds to step 46.

[Step 46] Brake control the motor M1. And register E
Decrements the value of _COUNT by 1 (subtracts 1).

In the routine up to this point, preparations for photographing are all completed, and the process proceeds to the STOP routine.

(Step 50) Except for the pre-winding control, the RELEASE routine is executed.

[Step 51] Store the digital value AD _IN1 obtained by AD-converting the analog signal from BV1 _OUT as the output of the photometric operation circuit MET by the microcomputer CPU into the register BV1 (BV1 = A
D _IN1 ). The value of BV-AV in terms of the apex value is stored in register BV1.

Also, the digital value AD which is obtained by converting the film sensitivity to AD
Store _IN2 in register SV (SV = AD _IN2 ). The SV value at the apex value is stored in the register SV.

Further, based on the store information of the register BV1 and the register SV, the shutter time is obtained (TV = BV1 + SV) and stored in the register TV. The contents of the register TV are the TV of the apex value.

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

[Step 53] in the same manner as step 8, and a checking voltage V _BAT of the battery BAT, in the case was less than the predetermined voltage proceeds to step 54, if it exceeds the predetermined voltage proceeds to step 55.

[Step 54] Similarly to step 9, the output port LED is set to H, and the warning light emitting diode LED is turned on to indicate that the battery voltage V _BAT has dropped and the camera cannot be operated.

[Step 55] The motor M1 is rotated in the reverse direction to release the mirror up and shutter charge.

[Step 56] Until the H supply signal is obtained at input port CMSP,
M1 is reversed, and the process proceeds to the next step 57. As a result, the mirror driving gear 126 and the shutter charge gear 142 are driven, the movable mirror 134 is mirror-up (exposure retreat state), and the shutter is released and the shutter becomes operable.

[Step 57] Perform brake control to stop motor M1.

[Step 58] The apex value TV obtained in step 51 is converted to the actual shutter time (real time extension).

[Step 59] With the output port DTON set to H, the data imprinting on the film surface by the date imprinting device DATE is started.

Since the date imprinting device itself is publicly known, detailed illustration is omitted, but, for example, a plurality of Japanese character-shaped LCD segments are arranged side by side and provided at a position facing the film surface on the back cover side, and a transmission place of this segment is selected. It is configured such that the film surface is exposed by making it into numeric or character information such as date and time.

Start the timer DTMR for imprint time. The content of this timer DTMR is a register in which the film sensitivity is stored.
This value depends on the contents of the SV. However, since the value SV as the content of the register SV is an apex value, the value α × 2β ^−SV (α and β are constants) converted into real time is the content of the timer DTMR.

Here, the timer interrupt of the timer DTMR is permitted (ENI). Thereafter, when the timer time of the timer DTMR expires, an interrupt is applied independently of the program of the main routine. In the interrupt routine, the DTON = 0 output port DTON is switched to L, and the DTMR / STOP timer DTMR is stopped. By returning to, the printing ends.

[Step 60] With the output port PSO set to H, power is supplied to the magnet MG1 for starting the group of shutter leading blades. As a result, the group of shutter leading blades travels to start exposing the film.

In addition, the actual time at the shutter second obtained in step 58 is actually counted. This time is the exposure time.

When the real-time counting ends, the output port PS1
Is set to H, the magnet MG2 for starting the rear shutter blade group is energized, whereby the rear shutter blade group is driven to stop the exposure of the film.

[Step 61] Wait for the time required for the rear blade group to run.

[Step 62] With both output ports PS0 and PS1 set to L, both magnets MG1 and M
Stop supplying power to G2.

[Step 63] Motor to perform mirror down and shutter charge
Reverse M1.

[Step 64] Until the L supply signal is obtained at the input port CMSP,
M1 is reversed, and the process proceeds to the next step 65. By this, the mirror drive gear 126 and the shutter charge gear 1
42 is driven, the movable mirror 134 is mirror-down (the finder observation state), and the shutter is charged.

[Step 65] Perform the brake control to stop the motor M1.

Even if the output port DTON is H again (timer
DTMR timer time has not expired yet), forced L
To end the data imprinting (DTON = 0). This means that if the film speed becomes very low, the imprint may not be completed within the charge time. However, when the charge ends, the film is rewound for the next frame in the next step, so that if the photographic operation is continued as it is, the photographic numerals and characters will flow. In this step 65, if the imprinting is still continuing even when the charging is completed, the imprinting is forcibly terminated to prevent the flow of the imprinted numbers and characters. Also, the interrupt is disabled and the subsequent interrupt is prohibited (D1SI).

[Step 66] Input state of SWPT _IN state of film load detection switch
The determination is made based on the supply signal to PT _IN . If the film is not loaded at H level, the process proceeds to step 67, and if the film is at L level, the process proceeds to step 68.

[Step 67] After waiting a standard time required for rewinding one frame of the film, the process proceeds to the STOP routine. The purpose is not to rewind the film when the film is not loaded.When the user operates the continuous shooting at the camera shop, the frame speed will be faster than when shooting with the film loaded. It is to prevent the user from giving the wrong specification to the user.

[Step 68] Rewind the film by rotating the motor M1 forward for the next frame.

[Step 69] Wait until the supply signal to the input port FLDY becomes H, and then proceed to step 70. That is, at the start of the normal rotation of the motor, the brush 85 is in the phase of the brake control section.

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

[Step 71] Perform the duty control of the motor M1.

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

[Step 73] Since the brush 85 has entered the brake control section, the register E _COUNT as an electrical film counter is decremented by 1 (DEC E _COUNT ) [Step 74] The value obtained by subtracting the register E _COUNT is “2” Otherwise, the process proceeds to step 75, and if the value is "2", the process proceeds to step 76. That is, when the register E _COUNT is “2”, the process proceeds to a different routine to control the end of photographing. Here, when the register E _COUNT is 2, the counter gear 88 as a mechanical film counter indicates "0" (the state where the number "0" of the film frame number display 88c corresponds from the display window 89 provided with the camera body). ). In the display 88c of the counter gear 88, the mark "E" corresponds to the display window 89 at the time of starting the preliminary winding, and the photographable film area is three frames ahead of the mark "E". Register E
_{Since COUNT} is set to "0" at the time of the mark "E", the film area (frame) that can be photographed is up to _ECOUNT = 3.

[Step 75] Since the register E _COUNT is not “2”, it can be determined that there are still photographable frames in the film, so the motor M1 is braked to stop film rewinding. Thereafter, the process proceeds to the STOP routine, and waits for the next frame to be photographed.

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

[Step 76] Since the register E _COUNT is "2", it means that all of the photographable frames have been photographed, so that the motor M1 continues to rotate forward in order to control the film to be wound around the film cartridge.

[Step 77] The timer TMR for detecting the stop of the film is initialized (TMR = 0).

[Steps 78 and 79] As in steps 13 and 22, when the film is no longer moved, the process proceeds to the next step 80. The fact that the movement of the film is stopped in these steps 78 and 79 means that the film is wound in the film cartridge.

[Step 80] Apply a brake to the motor M1 to stop the film rewinding operation.

[Step 81] The motor M1 is rotated in the reverse direction to perform an empty charge.

[Steps 82 and 83] Similarly to the steps 32 and 33, the motor M1 is continuously rotated until the mirror drive gear 126 and the shutter charge gear 142 make one rotation. This empty charge is transferred to the planetary gear 106 meshed with the rewind gear 110 by the film rewinding operation.
The main purpose is to allow the switching lever 170 to swing to the initial position thereafter.

[Step 84] Brake the motor M1 to end the empty charge operation. Then, 1 is set to the flag EFP as a determination flag for determining whether or not to execute the preliminary winding (E
FP = 1), the preparation for the preliminary winding control at the time of loading the next film is performed.

Also, register E as an electrical film counter
The _COUNT to initial reset (E _COUNT = 0).

Then, the process proceeds to the STOP routine of step 47, and the control is terminated.

Next, the camera operation centering on the movement of the mechanical mechanism will be described.

(Preliminary Winding Operation) The present embodiment employs a preliminary winding system in which the film is wound up by all frames prior to photographing, and the film is rewound by one frame for each photographing.

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

The forward rotation of the motor M1 causes the planetary gear 28, which is the transmission system on the lower output shaft side, to mesh with the transmission gear 32 by revolving (see FIG. 10 (a)), and the sun gear 38 via the transmission gears 34 and 36. Rotate clockwise. The rotation of the sun gear 38 causes the first planetary gear 40 to initially mesh with the transmission gear 48 for driving the spool by revolving, and the second planetary gear 46 meshes with the transmission gear 54 for driving the sprocket by rotation. Third
As shown in FIG. 7A, both the spool 52 and the drive sprocket 58 are rotated in the film winding direction. As a result, the leader part of the film F is initially driven sprocket.
It is sent to the spool 52 by 58, and the perforation is wound around the spool 52 by meshing with the spool claw 52a.

The planetary gear 106, which is a transmission system on the output shaft side above the motor M1, tries to move in the direction of meshing with the rewind gear 110 by revolving. In this state, however, the first restricting projection 170b of the switching lever 170 is used. It is merely stopped and idle (see FIG. 9 (a)).

When the leader portion of the film F is wound on the spool 52, the peripheral speed ratio between the transmission system on the spool side and the transmission system on the drive sprocket side is different.
The number of rotations of the transmission gear 54 (rotated by the drive sprocket 58 driven by the movement of the film) and the transmission gear 54 (rotated by the drive sprocket 58) do not match, and the second planetary lever 44 jumps clockwise (in FIG. 3). . Then, the second planetary lever 44 is moved clockwise by a click clock 44C.
Moves over the click projection 62b of the holding lever 62, and is held in a state where the second planetary gear 46 is disengaged from the transmission gear 54 (see FIG. 3 (b)). As a result, the subsequent film winding is driven only by the spool 52. According to this method, the film F can be automatically loaded. That is, the film leader cannot be reliably fed to the spool 52 by simply driving the spool 52 from the beginning, and it is certain that the film F can be driven by the driving sprocket 58 until the film leader is wound around the spool 52. This has a great advantage in performing an efficient autoloading.

After the film leader is wound around the spool 52, there is no point in driving the drive sprocket 58, so that the drive can be automatically switched to the drive of the spool 52 only. It is big. It is desirable to set the peripheral speed ratio between the spool 52 and the drive sprocket 58 so that the above-described holding of the second planetary lever 44 is performed immediately after the film leader is completely wound around the spool 52.

Thereafter, the film winding is continued until all the film frames have been wound. The state of this winding can be confirmed by the photographer by the intermittent feed rotation of the counter gear 88 based on the driven rotation of the driven sprocket 80. As described above, the counter gear 88 is provided with a film frame number display 88c, and a display window 89 (second display) provided in the camera body.
It can be understood from the figure that the film F is being wound up by observing the change in the number associated with the display 88c from the area surrounded by the two-dot chain line in the figure.

When the film F is wound up and stretched for the entire length, the rotation of the detection gear 84 linked to the driven sprocket 80 stops, whereby the signal indicating the film movement which has been continuously sent from the detection board 94 to the microcomputer CPU (No. 6). (See figure)
Is not output, and the completion of winding of the film F is detected.
The rotation of the motor M1 stops.

Next, the motor M1 is rotated counterclockwise (hereinafter referred to as reverse rotation).
Let it. The reverse rotation of the motor M1 causes the planetary gear 28 of the hoisting system to revolve in a direction away from the transmission gear 32, while the planetary gear 106, which is the transmission system on the upper output shaft side, revolves to transmit the transmission gear 120 of the mirror drive / charge drive system. And the mirror drive gear 126 and the shutter charge gear 142 are rotated. This rotation causes both gears 126 and 142 to make one revolution,
134 is driven in the initial state of mirror down → mirror up → mirror down, and the shutter charge lever 146 is driven in the order of charge → charge release → charge, and the signal board 160 is driven.
From FIG. 8 (see FIG. 8), the empty charge is performed until the ground level signal is output from the detection pattern 162 as the next shutter charge completion phase.

By the empty charging operation by the reverse rotation of the motor M1,
The switching lever 170 is released from the holding of the initial position by the tensioning lever 174 and swings clockwise (transition from FIG. 7 (a) → FIG. 7 (b) → FIG. 7 (c)). As a result, the first regulating projection 170b of the switching lever 170 is connected to the planetary gear 106 and the rewind gear.
Away from 110 (see FIG. 9 (b)), while the second
The regulating protrusion 170c enters between the planetary gear 28 and the transmission gear 32 (see FIG. 10 (b)). Therefore, in the subsequent forward rotation of the motor M1, the meshing between the planetary gear 106 and the rewind gear 110 can be performed, and conversely, the meshing between the planetary gear 28 and the transmission gear 32 is prevented.

Next, the motor M1 is rotated forward. This means that the film F is rewound to a predetermined position, that is, an indexing position where the rewinding of each frame can be performed accurately thereafter. In this state, the number of the film frame number display 88c of the counter gear 88 indicates the number of frames that can be photographed.

Up to this point, the preliminary winding operation is completed, and the operation is maintained in this state unless a release operation is performed thereafter.

(Shooting operation) When the micro computer CPU determines that the release switch SW2 has been turned on by pushing the release button 2 (see FIG. 1), the motor M1 is rotated in the reverse direction. When the mirror drive gear 126 and the shutter charge gear 142 are rotated, the movable mirror 134 is mirrored up, and the shutter charge lever 146 is released from charge (see FIG. 7 (b)). Stop. In this state, the shutter operation is performed, and with the completion of the running of the rear blade group of the shutter, the motor M1 is further rotated in the reverse direction, and the mirror drive gear 126 and the shutter charge gear 142 are rotated again, and in the future, the movable mirror will be rotated. The mirror M is lowered, and the motor M1 is stopped when the shutter charge lever 146 is charged (see FIG. 7C). Immediately, the motor M1 is controlled to rotate forward,
The planetary gear 106, which is the transmission system on the output shaft side above M1, revolves and meshes with the rewind gear 110 to rewind the film. In the forward rotation of the motor M1, the planetary gear 28, which is the transmission system on the lower output shaft side, also revolves and tries to mesh with the transmission gear 32. In this state, the switching lever 170 is moved to the position shown in FIG. As shown in FIG.
Since 0c enters between the planetary gear 28 and the transmission gear 32 (see FIG. 10 (b)), the gears 28 and 32 do not engage with each other. The output of the motor M1 is not transmitted to the hoist transmission system.

When the film is rewound, the driven sprocket 80 rotates clockwise (in FIG. 2) following the movement of the film, and the detection gear 84 also rotates synchronously. Shortly before the film F is rewound by one frame, the motor M1 is driven by the duty control to decelerate. When the rewound of one frame is performed, the motor M1 is brake-controlled and stopped.

In this state, a standby state for photographing the next frame is established, the counter gear 88 is also rotated clockwise by one pitch, and the frame number display is reduced by one.

Thereafter, each time the release button SW2 is pressed, the above-described operation is repeated to perform photographing.

(Roll-in operation) At the time of the completion of the photographing operation, it is checked whether the current number of film frames is the second frame with an electric film counter,
If it is the second frame, the motor M1 is controlled to rotate forward and the film is wound around the cartridge. The electrical film counter referred to here is a counter (register E _COUNT ) built in the micro computer CPU, and counts up for each winding corresponding to one frame in the film preliminary winding operation, and one frame of film. It counts down when rewinding is completed. The electric film counter is exposed for the number of frames (three frames in this embodiment) corresponding to normal auto-loading at the initial stage of winding, that is, when the film is loaded from the film leader to several frames. It is used as information for prohibiting photographing in a concealed portion. When it is detected that the film F has been wound (or immediately before the winding) and the rotation of the driven sprocket 80 has stopped,
The motor M1 is stopped.

Then, the motor M1 is rotated in the reverse direction to perform an empty charge, and the motor M1 is stopped when the mirror drive gear 126 and the shutter charge gear 142 are rotated once (the mirror passes through the mirror up phase and the mirror is moved down). Let it.

The meaning of the empty charge after the film is wound is that the planetary gear 106 meshing with the rewind gear 110 is revolved in the direction of the transmission gear 120 by the above-mentioned film winding operation, and the planetary gear 28 is moved to the transmission gear 120 side. To revolve in the direction away from 32. That is, the positions of the two planetary gears 28 and 106 during the operation of the switching lever 170 that returns to the initial position and swings (counterclockwise) in conjunction with the opening of the back cover 70 (for film exchange) that occurs thereafter are specified. It is to ensure that the next film preliminary winding operation can be executed.

Due to the empty charge described above, especially the planetary gear 106
As it revolves to the 20 side, opening the back lid 70
As shown in FIG. 7D, the reset lever 178 is pivoted counterclockwise by the spring 180 so that the pushing projection 178b is moved by the switching lever 170.
(The spring 180 is set with a stronger spring force than the spring 172 for urging the switching lever 170 to swing clockwise). The counterclockwise swing of the switching lever 170 causes the tensioning lever 1
74 moves (pin 174c is guided by guide projection 170e)
To lock the latch pawl 174a to the tensioning projection 170d,
170 is returned to the initial position shown in FIG. 2 and FIG. 7 (a). Therefore, the first restricting projection 170b at the upper end of the switching lever 170 enters between the planetary gear 106 and the rewind gear 110 and inhibits the engagement of the motor M1 at the time of forward rotation. The second restricting projection 170c is separated from the space between the planet gear 28 and the transmission gear 32 to allow the motor M1 to mesh during normal rotation.

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

When the back cover 70 is opened, the reset lever 60 in the film winding system is released from the pushing by the pushing projection 70b, and is pushed by the reset spring 66 to swing clockwise.
Accordingly, as shown in FIG. 3 (c), the holding lever 62 also swings clockwise, and the pin 62a pushes the projecting portion 44b to swing the second planetary lever 44 clockwise.
46 is returned to the initial position where it can mesh with the transmission gear 54. After that, when the back cover 70 is closed again, FIG.
, And the position of the second planetary lever 44 does not change.

Further, when the back cover 70 is opened, the counter reset lever 90 in the film counter mechanism is released from being pushed by the pushing projection 70c, and swings counterclockwise by the spring 92. Accordingly, the pushing portion 90c of the counter reset lever 90 pushes the counter feed shaft 86 in the direction opposite to the counter gear 88, and sets the counter gear 88 free to the initial position (“E”) by a spring force (not shown). The display is returned clockwise to the position visible in the display window 89), and the initial reset of the frame number display is performed. However, in the normal shooting operation, when the shooting of all the frames is completed and the film winding operation is completed, the counter gear 88 has already been intermittently returned to the initial position, so the return operation by the above-described spring is performed. Is performed when the back cover 70 is opened halfway during a simulated photographing operation without inserting the film into the camera by demonstration or the like.

In the film winding drive mechanism in the above-described embodiment, the first planetary lever 42 and the second planetary lever 44 are constituted by a common sun gear 38 independently of the transmission system on the spool 52 side and the transmission system on the drive sprocket 58 side. However, this is a measure to be taken when the back cover 70 is opened in a rewinding state in which the photographing of all the frames of the film has not been completed, and the film is rewinded by closing the back cover 70 again. That is, the opening of the back cover 70 releases the locking of the second planetary lever 44 and swings, so that the meshing between the second planetary gear 46 and the transmission gear 54 is allowed. Planetary gears 40, 46 associated with the driven rotation of the spool 52 and the drive sprocket 58 (reverse rotation from the winding).
Driven rotation occurs. Spool 52 and drive sprocket 58
However, when the planetary clutch mechanism is also provided in the transmission system on the spool 52 side as in this embodiment, the first planetary lever 42 swings. First
Since the meshing between the planetary gear 40 and the transmission gear 48 is appropriately disengaged,
I can deal with it.

〔The invention's effect〕

A single motor drives a preparatory operation mechanism for preparing for the next frame photographing, a film wind-up driving mechanism, and a film rewinding drive, so that cost and space can be reduced. When the three mechanisms are driven by the motors, the loads are not overlapped, so that a small motor can be employed, and the level at which the battery cannot be operated due to a decrease in battery voltage can be set at a considerably low level. it can.

Since the switching of the output transmission system of the motor is performed by using a clutch means which is switched by switching the rotation direction of the motor output, the automation can be realized. Further, although the above-mentioned clutch means can normally only switch connection with two mechanisms, the provision of a blocking member for preventing the clutch operation in the clutch means makes it possible to easily switch connection with three mechanisms.

Further, as a structure for selectively preventing meshing of the planetary gear with the camera operation mechanism due to revolution, the planetary gear selectively enters a neutral position of the revolution range of the planetary gear. A blocking member is provided for switching the object to be blocked by using the driving force of the cam member by the operation of the camera operating mechanism, so that the reliability can be greatly improved without being greatly influenced by the dimensional accuracy, and the simple operation can be performed. The camera operation mechanism to be transmitted can be switched by using.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the configuration and arrangement of a single-lens reflex camera as an embodiment. FIG. 2 is a perspective view of each component in FIG. FIG. 3 shows the spool-side main part of the film winding drive mechanism in the second position.
FIG. 3A is a view for explaining the operation as viewed from below, wherein FIG. 3A shows the state at the start of preliminary winding, and FIG. 3B shows the state after the leader of the film has been wound around the spool at the initial stage of preliminary winding. FIG. 3 (c) shows a state in which the back lid is opened. FIG. 4 is a view of the detection gear of FIG. 2 viewed from below. FIG. 5 is a view of the detection substrate of FIG. 2 as viewed from above. FIG. 6 is a time chart of signals obtained from each terminal of the detection board of FIG. 7A and 7B are explanatory diagrams of the operation of the film rewinding drive mechanism and the mirror box drive mechanism as viewed from the side. FIG. 7A shows the initial state or preliminary winding, and FIG. 7B shows the mirror up state. FIG. 7 (c) shows the mirror down state after the mirror box drive mechanism is operated. FIG. 8 is an explanatory view of the operation of the brush on the signal board. FIG. 8 (a) shows a state in which shutter charge is completed (mirror down), and FIG. 8 (b) shows a state in which mirror up is completed (shutter release). FIG. 9 is a view for explaining the operation of the film rewinding drive mechanism as viewed from above. FIG. 9 (a) is an initial state or during preliminary winding, and FIG. 9 (b) is a mirror box drive mechanism by motor reverse rotation. In operation, FIG. 9 (c) shows the operation of the film rewind drive mechanism by forward rotation of the motor, and FIG. 9 (d) shows the back cover opened. FIG. 10 is a view for explaining the operation of the main part of the film winding drive mechanism on the motor side viewed from below. FIG. 10 (a) is an initial state or at the time of preliminary winding, and FIG. When the mirror box drive mechanism is operating, FIG. 10 (c) is when the film rewind drive mechanism is operating by forward rotation of the motor, and FIG. 10 (d).
Is when the back cover is opened. FIG. 11 is a main part circuit diagram relating to camera control. 12 and 13 are flow chart diagrams. M1 ... Motor, 5 ... Film rewind drive mechanism corresponding to the first camera operation mechanism, 6 ... Film rewind drive mechanism corresponding to the second camera operation mechanism, 7 ... Third camera A mirror box drive mechanism as a preparatory operation mechanism corresponding to an operation mechanism, 28, a planetary gear as a first planetary gear, 106
.... planetary gears as second planetary gears, 104, 106, 108
120 first clutch means, 104, 106, 108, 110 second clutch means, 170 switching lever as blocking member, 128 mirror drive cam as cam member, 126, 128
· 132 · 136 · 138 · · · · members constituting the structure for swinging the movable mirror, 142 · 144 · 146 · · · · members constituting the structure for charging and releasing the shutter

Continuation of the front page (56) References JP-A-60-233627 (JP, A) JP-A-60-140219 (JP, A) JP-A-60-131529 (JP, A)

Claims (5)

(57) [Claims] A motor, a drive source using the output of the motor, and a preparation operation mechanism for preparing for the next frame photographing based on rotation of the motor in a first direction; and a drive source using the output of the motor. A film winding drive mechanism that winds up a film based on rotation of the motor in a second direction; and a film winding that uses the output of the motor as a drive source and rewinds the film based on rotation of the motor in a second direction. A return drive mechanism; first clutch means for transmitting an output to the preparation operation mechanism based on the rotation of the motor in the first direction; and an output of the film winding based on the rotation of the motor in the second direction. A second planetary gear provided with a first planetary gear for transmitting to the upper drive mechanism, a second planetary gear for transmitting an output to the film rewind drive mechanism based on the rotation in the second direction, and the motor The said In order to transmit the output to only one of the film hoisting drive mechanism and the film rewinding drive mechanism during the rotation of the second clutch means, the revolution of one of the planetary gears in the second clutch means is prevented. A motor for switching a mechanism capable of transmitting the rotation in the second direction by changing a position by rotation of a cam member that rotates with the operation of the preparatory operation mechanism. Driving camera. 2. A pre-winding type motor driven camera in which a film is wound up by a whole frame in advance when a film is loaded, and the film is rewound every time a photograph is taken. A preparation operation mechanism for preparing for the next frame photographing based on the rotation in the first direction, and a film hoist that uses the output of the motor as a drive source and winds the film based on the rotation of the motor in the second direction. A drive mechanism, a film rewind drive mechanism that uses the output of the motor as a drive source and rewinds the film based on rotation of the motor in a second direction, and outputs an output based on the rotation of the motor in the first direction. First clutch means for transmitting to the preparatory operation mechanism; first planetary gear for transmitting output to the film hoisting drive mechanism based on rotation of the motor in the second direction; A second clutch means provided with a second planetary gear for transmitting an output to the film rewind drive mechanism based on the rotation in the second direction; and in an initial state, when the motor rotates in the second direction, And a blocking member for preventing the rotation of the second planetary gear in the second clutch means so as to transmit the output only to the film winding drive mechanism, wherein the blocking member is provided with the preparatory operation mechanism. The position of the first planetary gear is changed by rotating the cam member that rotates in accordance with the above operation, so that the output in the rotation in the second direction is transmitted only to the film rewinding drive mechanism. A motor-driven camera that switches so as to prevent revolution. 3. A motor-driven camera according to claim 1, wherein said preparatory operation mechanism includes a structure for swinging a movable mirror. 4. The preparatory operation mechanism includes a shutter charger,
3. The motor-driven camera according to claim 1, further comprising a structure for canceling charge. 5. A motor, a first planetary gear that revolves based on the output rotation of the motor, a second planetary gear that revolves based on the output rotation of the motor, and rotation of the motor in a first direction. A first camera operating mechanism that meshes with the first planetary gear by the revolution of the first planetary gear; and the second planetary gear by the revolution of the second planetary gear by rotation of the motor in a first direction. A second camera operating mechanism that meshes with a gear; and a third camera that is operated by rotation of the motor in a second direction using an output of the motor as a driving source, and provided with a cam member that rotates by the operation. A camera operating mechanism, in an initial state, has entered a neutral position of only one of the first planetary gear and the second planetary gear in the orbital region, and has a second position based on rotation of the motor in a second direction. 3 camera operation mechanism Using the driving force of the cam member by the operation, the cam member is retracted from the one revolution region and switched to enter the neutral position of the other revolution region, and when the motor rotates in the first direction, the motor rotates in the first direction. A motor-driven camera, comprising: a blocking member that selectively blocks engagement of the first or second planetary gear with the first or second camera operating mechanism.