JPH0578812B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a camera that transmits, for example, the forward/reverse rotation output of a motor as a driving force for operating various functions.

(Background of the Invention) In recent years, automation of cameras has progressed, and cameras that use forward and reverse rotation of a motor to drive a film, a photographing lens, a shutter, etc., for example, have been proposed and commercialized. However, these known cameras are generally capable of transmitting only one series of driving force for forward and reverse rotations of one motor, and therefore the various functions described above are performed using the output of each motor. To make it work, many motors had to be placed inside the camera.

In addition, in a camera that winds the film by rotating the motor in the forward direction and rewinds it by rotating the motor in the reverse direction, the driving force transmission chain in the film rewinding direction can be switched midway through.
Cameras are already known that use the reverse output of the motor to drive the photographic lens, but in such cameras, it is necessary to perform a switching operation to switch the transmission chain midway, which makes operability difficult. It wasn't good. Further, when the switching operation is performed, an expensive switching force generating means such as a magnet is required to switch the transmission train, resulting in an expensive camera.

Furthermore, Japanese Patent Laid-Open No. 100127/1983 has proposed a transmission device similar to the above-mentioned method. This means that the motor's driving force is switched from the photographing lens's driving force transmission system to the film rewinding transmission system every time the lens is driven, and the drive transmission system returns to its initial state when the photographic lens is moved. It is designed to return to a certain photographic lens transmission system. Therefore,
In order to alternately wind the film and move the photographic lens, it is always necessary to manually return the transmission system to its initial state, which poses problems in terms of operability and applicability.

(Object of the Invention) The object of the present invention is to solve the above-mentioned problems and to provide a camera capable of transmitting output in both forward and reverse directions from a single driving source as driving force for operating three or more functions. The goal is to provide the following.

(Features of the Invention) To achieve this object, the present invention provides a third camera operating mechanism that operates via a transmission mechanism by driving the drive source in the second direction;
between the transmission mechanism and the third camera operating mechanism, wherein the third camera operating mechanism is operated by driving in the direction, and the third camera operating mechanism is inoperative by driving in the first direction. A clutch mechanism provided in the
The transmission mechanism, when driving the drive source in the second direction,
During the predetermined drive amount from the initial state by the drive source, the second
The camera operating mechanism is set in a non-transmission state, but the third camera operating mechanism via the clutch mechanism is set in a transmission state, and the predetermined amount of drive is applied to the initial state of the third camera operating mechanism. After setting the drive amount to be equal to or greater than the drive amount from the state to the end of the operation, and driving the third camera operating mechanism by rotation of the drive source in the second direction, the position of the drive source in the first direction is set. The present invention is characterized by having a return mechanism that returns the transmission mechanism to its initial state by a certain amount of rotation.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

1 to 6 are mechanical configuration diagrams showing one embodiment of the present invention. In FIGS. 1 to 6, the positions are partially shifted to make the structure easier to understand. A pinion 1a is fixed to the tip of the rotating shaft of the motor 1 for transmitting the output generated by the motor 1 to a gear 2 via a reduction gear train (not shown). The gear 3 is rotatable around a shaft 4 while meshing with the gear 2 and a sun gear to be described later, and has an output transmission section 3 on the lower surface that transmits output to the gear 5.
It has a. The gear 5 has the gear 3 on the top surface.
It has a convex part 5a that comes into contact with the output transmission part 3a, and a small gear part 5b that meshes with a sun gear, which will be described later, on the lower surface, and as can be seen from FIG. During one rotation, the output transmission portion 3a does not touch the convex portion 5a, and the gear 3
Since the output is not transmitted, the structure is such that it does not rotate during this time.

A sun gear 6 that meshes with the small gear portion 5b of the gear 5 includes a planet gear 8 supported by an arm 7 so as to be able to revolve around the sun gear 6, and a moderate amount of friction to prevent rotation of the planet gear 8. Friction spring 9 and spring receiver 10 that generate friction torque
When the sun gear 6 rotates counterclockwise, the planet gear 8 revolves counterclockwise and meshes with the winding gear 11 (see FIG. 1). In this state, the output of the sun gear 6 is transmitted to a spool (not shown) via the planetary gear 8 and winding gear 11, and winding of the film is started. Conversely, when the sun gear 6 rotates clockwise, the planetary gear 8 revolves clockwise and meshes with the rewinding gear 12 (see FIG. 5). In this state, the output of the sun gear 6 is transmitted to a fork (not shown) via the planetary gear 8 and the rewinding gear 12, and rewinding of the film is started.

The sun gear 13 that meshes with the gear 3 constitutes a planetary gear mechanism as described above with a planetary gear 15 supported by an arm 14 so as to be able to revolve around the sun gear 13, a friction spring 16, and a spring receiver 17. When the sun gear 13 rotates clockwise, the planetary gears 15 revolve clockwise and mesh with gears to be described later (the state shown in FIG. 2).
Conversely, when the sun gear 13 rotates counterclockwise, the planetary gears 16 revolve counterclockwise and stop at a position where they abut against the stopper 18 (the state shown in FIG. 1).

The gear 19 transmits the output of the planetary gear 15 to the set lever 20, and is rotatable around a shaft 19a, with a cam pin 19b provided at the tip of the shaft 19a fitting into a helical member to be described later. There is. The set lever 20 is connected to the long groove 2 by transmitting the output from the gear 19 to the rack portion 20a.
0b and the structural member 21 fitted in the long groove 20b, it moves in the direction of arrow A, and the distance adjustment operation and exposure operation are performed by a slide lever and a hook claw, which will be described later. Since it is biased in the direction of arrow B (see FIG. 1) by the spring 22, it is stopped in the state shown in FIG. 1 in which it hits a stopper (not shown). Also, the set lever 20 has a hook 2.
3 is attached, a hole 20d into which a pulse contact piece 24 that generates a pulse signal for notifying the movement position of the set lever 20 by a pulse plate (not shown) is caulked, and an adjustment pin 20e.
is provided. Furthermore, a slide lever to be described later is provided on the set lever 20.
A pin 26 is installed to hold one end of a spring 27 that has the role of following the movement of the spring 27. The set lever 20 has the gear 3 rotated approximately 2/3 in the counterclockwise direction.
By rotating, the movement from the state shown in FIG. 1 to the state shown in FIG. 5 is completed.

The hooking pawl 23 is rotatably supported by a shaft 28 on the upright portion 20c of the set lever 20, and is always biased counterclockwise by a spring 29. In FIG. 1, since the slide lever 30 is pressed by a release pin 31, it remains in the clockwise rotated position, and when the release pin 31 is released, the stopper (not shown) It is stopped at the position shown in Fig. 2, where it is in contact with the Further, the hooking pawl 23 has a pawl portion 23a that engages with a charge portion of a distance ring to be described later in the state shown in FIG. A trapezoidal release portion 23c is provided.

The slide lever 30 is biased by the spring 27 and moves in the direction of arrow A by the action of the long groove 30a and the structural member 32, following the movement of the set lever 20, and moves at a slower speed than the moving speed of the set lever 20. A gear 33 and an escape wheel 34 mesh with the rack portion 30b to move at speed.
and an ankle 35, which is connected to a known governor mechanism. Further, the slide lever 30 includes an upright portion 30c that comes into contact with the end surface 20f of the set lever 20, the release pin 31, and the spring 27.
It is provided with an upright portion 30d that holds the other end, and a tensioning portion 30e that comes into contact with a claw portion of a locking claw, which will be described later.

The distance ring 36 is rotatably supported by a base plate (not shown), and is normally biased counterclockwise by a spring 37 whose one end is hung on a spring hook 36a, so that the distance ring 36 hits a stopper (not shown). It is stopped in the state shown in Fig. 1 where the two are in contact. Also, the gear 1
9 rotates and the set lever 20 moves in the direction of the arrow A, the claw portion 23 of the hook portion 23
The charge portion 36b is hooked by the force a and rotates clockwise as shown in FIGS. 2 and 3 against the bias of the spring 37. At this time, a lens barrel (not shown) is guided by the lead cam 36c and extended, and the photographing lens is focused. The distance ring 36
In addition, a claw portion 36e that engages with a claw portion 38a of the locking claw 38 is provided.

The locking pawl 38 is rotatably supported by a structural member (not shown) fitted into the hole 38b,
Spring 3 whose one end is held by spring hook 38c
9, the pin portion 38d is in contact with the upright portion 30c of the slide lever 30 and remains at this position in the state shown in FIG. In Figures 2 to 5, the slide lever 30
is in the state of moving in the direction of arrow A, the locking pawl 38 rotates clockwise according to the bias of the spring 39, and the locking pawl 38 rotates clockwise in accordance with the bias of the spring 39, so that any pawl portion 3 of the distance ring 36
6e to prevent the distance ring 36 from rotating counterclockwise.

The blade opening lever 40 is used to open and close a shutter blade (not shown), is held rotatably around a hole 40a, and is always biased counterclockwise by a spring 41. In FIG. 1, the shutter blade is urged counterclockwise by the spring 41 to a position where it contacts a stopper (not shown), and in this state, the shutter blade is closed. In addition, in the process of moving the set lever 20 in the direction of arrow A, the claw part 40b is caught by the claw part 23a of the hooking claw 23, and the blade opening lever 40 is rotated clockwise (as shown in FIG. 3). state), at this time the pin part 40c
The shutter is opened by the action of The locking pawl 42 is held rotatably around the hole 42a,
Although it is always biased clockwise by a spring 43, in FIG. 1 it hits a stopper 44 and stops at that position. The locking pawl 42 locks the tensioning portion 30e of the slide lever 30, and includes a pawl portion 42b that temporarily stops the movement of the slide lever 30, and a locking state between the tensioning portion 30e and the pawl portion 42b. A cam portion 42c that releases together with the adjustment pin portion 20e of the set lever 20 is provided.

The helical members 45 and 46 are urged by a spring (not shown) in the direction of pushing against each other, and since one helical member 45 is stopped by a stopper (not shown), the other helical member 46 is The positional relationship shown in FIG. 1 is maintained by colliding with member 45. The cam pin 1 of the gear 19 is attached to the helical members 45 and 46 as shown in FIG.
Spiral grooves 45a and 46a that fit and hold 9b
(the groove 46a is not shown) is formed,
When the gear 19 rotates clockwise, the groove 4
Since the cam pin 19b is guided by 5a and 46a and gradually moves upward, the gear 19
The set lever moves upward against the bias (downward) of a spring (not shown) to hold it in the state shown in FIG. 1, and when it has rotated approximately two times (the state shown in FIG. 20 is configured to disengage from the rack portion 20a. Also, at this time, as shown in FIG.
Since it protrudes from the upper surface of , it will no longer move upwards. Also, a recess 4 is formed in a part of the abutting portion of the helical members 45 and 46 so that there is a slight gap.
5b, 46b (see Figure 1) are formed,
When the claw portion 47a of the reset lever 47 is inserted into the recesses 45b and 46b, the helical members 45 and 46 rotate in a direction away from each other around the holes 45c and 46c (see FIG. 6). The cam pin 19b is removed from inside the helical members 45 and 46. As a result, the gear 19 and the rack portion 20a are brought into engagement again as shown in FIG.

The reset lever 47 is connected to a shaft 48 and a long groove 47 in conjunction with opening and closing operations of the back cover (not shown).
It is configured to be slidable in the vertical direction by the action of b, and normally (when the back cover is closed) is biased upward by a spring 49, so that it is positioned in the state shown in FIG. When the back cover is opened, it slides downward as shown in FIG. 6 against the bias of the spring 49, and at this time, the claw 47a is inserted between the recesses 45b and 46b. Then, the gear 19 and the rack portion 20a are returned to the engaged state as described above.

FIG. 7 is a block diagram for controlling the drive of each of the members. 50 is a sequence control circuit consisting of a microcomputer etc. that controls each circuit; 51 is a known photometry circuit; 52 is an A/D conversion circuit that converts the photometry information from the photometry circuit 51 into a digital signal; 53 is the A counter 54 holds the digital value from the A/D conversion circuit 52, and a counter 54 stores the pulses generated by the pulse contact piece 24 and a pulse plate (not shown) by the movement of the set lever 20 during the exposure operation. A pulse detection circuit 55 compares the digital value (EV value) from the counter 53 with the number of pulses from the pulse detection circuit 54, detects a match, and sends a match to the sequence control circuit 50. a coincidence detection circuit that outputs a signal E;
56 is a known distance measuring circuit; 57 is the distance measuring circuit 56;
A/ that converts distance measurement information from
A D conversion circuit, 58 is a counter that holds the digital value from the A/D conversion circuit 57, and 59 is a counter that holds the digital value from the A/D conversion circuit 57.
A pulse detection circuit 60 has a function similar to that of the pulse detection circuit 54, which detects the number of pulses generated by the pulse contact piece 24 and a pulse plate (not shown) by the movement of 0; This is a coincidence detection circuit that compares the value with the number of pulses from the pulse detection circuit 59 and outputs a coincidence signal F by detecting coincidence.

61 is a motor control circuit that controls forward and reverse rotation of the motor 1; 62 is the motor control circuit 61;
A winding and rewinding circuit 63 energizes the motor 1 in the film winding direction or the film rewinding direction in accordance with a signal from the photometering circuit 51 and the distance measuring circuit 5;
A display circuit 64 displays each piece of information obtained in step 6 in the viewfinder, and 64 is a display circuit 64 that displays the slide lever 30 after the set lever 20 has stopped at the first or second position (details will be described later) and when the slide lever 30 has reached that position. ,
A timer circuit 65 determines a time period for prohibiting energization of the motor 1 until the distance adjustment operation or exposure operation is completely completed; 65 is a timer circuit for detecting a film tension state; 66 is a timer circuit for detecting a film tension state; A film presence/absence detection circuit 67 corresponds to a known film presence/absence switch that detects whether or not the film is in a position facing the aperture; The status detection circuit 68 is a known strobe circuit.

Next, the operation will be explained according to the flowchart of FIG. 8 while referring to FIG. When the photographer presses a release button (not shown) to the first stage (first stroke), a battery check instruction is issued from the sequence control circuit 50 to a known battery check circuit, and the battery check is performed. As a result, if the battery voltage is sufficient to carry out a series of photographing operations, a start signal is output from the sequence control circuit 50 to the photometry circuit 51, and the photometry circuit 51 starts detecting the subject brightness. After that, the photometry circuit 51
When the photometry end signal is generated, the sequence control circuit 50 outputs a start signal to the distance measuring circuit 56, and the distance measuring circuit 56 starts detecting the distance to the subject. The photometry and distance measurement information obtained at this time is stored in the memory section in the sequence control circuit 50, and also in the A/D conversion circuit 52,
57, each of which is converted into a digital signal and sent to counters 53 and 58 at the next stage. Further, each piece of information stored in the memory section of the sequence control circuit 50 is displayed in the finder via the display circuit 63. Further, the photometric information obtained by the photometric circuit 51 is
If the EV value is lower than the EV value (the subject is dark), a strobe charging start signal is output from the sequence control circuit 50 to the strobe circuit 68.

After the information displayed in the viewfinder has been confirmed as described above, when the photographer further presses up to the second stroke (second stroke),
A motor forward rotation instruction signal is output from the sequence control circuit 50 to the motor control circuit 61, and the motor 1 begins to rotate forward. When the motor 1 starts to rotate in the normal direction in this way, its output is transmitted to the gear 3 via the gear 2, and the gear 3 rotates counterclockwise to the sun gear 13.
begin to rotate clockwise. Further, as the sun gear 13 rotates clockwise, the planetary gear 15 revolves clockwise due to the action of the sun gear 13 and the like, meshing with the gear 19, transmitting its output to the gear 19, and rotating the gear 19 clockwise. Rotate it.

When the gear 19 rotates clockwise, its output is transmitted to the rack portion 20a, and the set lever 20 begins to move in the direction of arrow A against the bias of the spring 22. As a result, the end face 2 of the set lever 20
Since the contact between 0f and the vertical portion 30c of the slide lever 30 is removed, the slide lever 30 also tries to start moving at the same speed according to the urging force of the spring 27 generated as the set lever 20 moves. Since the slide lever 30 is connected to a governor mechanism consisting of a gear 33, an escape wheel 34, and a pallet lever 35, it starts moving at a slower speed than the set lever 20, as shown in FIG.

The set lever 20 and the slide lever 3
When the phase with respect to 0 deviates slightly from the positional relationship shown in FIG. Rotate counterclockwise until it comes into contact with the position shown in Fig. 2. As a result, the claw portion 23a of the hooking claw 23 and the charge portion 36b of the distance ring 36 become engageable. When the set lever 20 further moves with the hook 23 in this posture, the claw portion 23a of the hook 23 hooks the charge portion 36b of the distance ring 36, and the distance ring 36 is biased by the spring 37. Against this, rotate it clockwise as shown in Figure 2.

In addition, as described above, in the process of the set lever 20 moving in the direction of the arrow A, a pulse signal is generated by the pulse contact piece 24 attached to the lower part of the set lever 20 and the pulse plate (not shown) (see FIG. 9). , this pulse signal is detected by the pulse detection circuit 59 and sequentially outputted to the coincidence detection circuit 60, where it is compared with the digital value from the counter 58. Thereafter, when a match is detected by the match detection circuit 60, a match signal F is outputted to the sequence control circuit 50, whereby the motor 1 is reversely energized and the motor 1 is abruptly stopped. As a result of the above, the set lever 20 has been moved to the first position based on the distance measurement information obtained by the distance measurement circuit 56. For example, if the above-mentioned distance measurement information is 1.5m, the motor 1
When reverse energization is applied to the motor 1 and the motor 1 is suddenly stopped, the set lever 20 will stop at a position approximately corresponding to the 1.5 m. As shown in FIG. 9, the braking distance of the set lever 20 at this time is assumed to be the distance that the set lever 20 moves to the position immediately before the next (sixth) pulse signal is generated. Furthermore, even if the set lever 20 is stopped in such a state, the set lever 20 will not move in the direction of arrow B by the biasing force of the spring 22 due to the friction of the gear train including the motor 1.

Thereafter, the slide lever 30 moves with a delay and when it reaches the first position where the set lever 20 is stopped, the release part 23c of the hooking pawl 23 is released by the release pin 31 attached to the upright part 30d. Pushed downward, the engagement between the claw portion 23a and the claw portion 36b of the distance ring 36 is released. When the engagement between the hooking pawl 23 and the distance ring 36 is released, the distance ring 36 is biased by the spring 37.
attempts to rotate counterclockwise, but at this time, as the slide lever 30 moves, the pin portion 38d of the slide lever 3 is moved by the action of the spring 39.
The locking pawl 38 rotating clockwise while in contact with the upright portion 30c of the distance ring 36 is in the state shown in FIG.
6e, the distance ring 36 remains in the state shown in FIG. 3 and does not move counterclockwise. Depending on the amount of rotation of the distance ring 36, the amount of extension of the photographic lens (not shown) changes, and the focusing of the photographic lens, that is, the distance adjustment operation is completed.

Sufficient time has elapsed for the above-mentioned operation to be completed, that is, the time required from when the set lever 20 stops at the first position until the photographing lens is extended to the position according to the distance measurement information at that time has elapsed. However, when the timer circuit 64 times out, the sequence control circuit 50 again outputs the motor normal rotation instruction signal to the motor control circuit 61, and the motor 1 starts rotating in the normal direction. When the motor 1 starts to rotate in the normal direction in this way, its output is transmitted to the rack portion 20a of the set lever 20 via the gear 2, the gear 3, the sun gear 13, the planetary gear 15, and the gear 19, and the set lever 20 is rotated. It starts moving further in the direction of arrow A from the first position. When the set lever 20 begins to move in the direction of arrow A in this manner, the slide lever 30 also begins to slowly move in the same direction following it, creating a phase difference between the set lever 20 and the slide lever 30. As a result, the release pin 31 and the release portion 23c of the hooking claw 23
The hooking claw 23 rotates counterclockwise, and the claw portion 23a of the hooking claw 23 and the claw portion 40b of the blade opening lever 40 become engageable.

When the set lever 20 moves to the position immediately before the ninth pulse signal is generated, the hooking pawl 23 and the blade opening lever 40 engage as shown in FIG. As the set lever 20 moves further in this position, the catch pawl 23
The claw portion 23a is the claw portion 40b of the blade opening lever 40.
, and rotate the blade opening lever 40 clockwise against the bias of the spring 41. Note 9
When the set lever 20 moves to the position immediately before the second pulse signal is generated, that is, to a predetermined point, the slide lever 30 that follows the set lever 20 has its rising portion 30e close to the claw portion 42b of the locking claw 42. The set lever 20 is temporarily stopped at the position shown in FIG.
When the lever moves a little beyond the position shown in the figure, the cam portion 42c of the locking pawl 42 is pressed by the adjustment pin portion 20e, the engagement state is released, and the set lever 20 begins to move again following the movement of the set lever 20. The locking claw 42 is arranged as described above, for example, when photographing a subject located at 1.0 m, which is the closest distance that this camera can photograph, after the distance adjustment operation is completed as described above. The shutter operation will start immediately, but in order to eliminate the instability of the start-up characteristics of the motor 1 at the start of the shutter operation in such a case, a phase difference is provided between the set lever 20 and the slide lever 30. This is for the purpose of starting the shutter operation in the current state.

Also, as described above, in the process of the set lever 20 moving in the direction of arrow A, a pulse signal is generated by the contact piece 24 attached to its lower part and a pulse plate (not shown) (see FIG. 9). ,
This pulse signal is detected by the pulse detection circuit 54 and sequentially outputted to the coincidence detection circuit 55, where it is compared with the digital value from the counter 53. After that, the coincidence detection circuit 55
When a match is detected, a match signal E is output to the sequence control circuit 50,
As a result, the motor 1 is reversely energized and the motor 1 suddenly stops. As a result of the above, the set lever 20 has been moved to the second position based on the photometric information obtained by the photometric circuit 51. For example, if the photometric information (subject brightness) mentioned above is
If the EV12 is EV12, when the pulse as shown in FIG. is the above
It stops at a position corresponding to EV12, and at this time, the blade opening lever 40, which is rotated clockwise by the claw part 23a of the hooking claw 23, moves the shutter (not shown) to the ninth position.
It will stop with the F ₁ aperture open as shown.
As a result, exposure of the film surface is started.

By the way, if the photometric information obtained by the photometric circuit 51 is determined by the sequence control circuit 50 to be lower than a predetermined brightness, the sequence control circuit 50 will output the information shortly after the set lever 20 stops. A strobe light emission signal is output to the strobe circuit 68, and strobe light is emitted (see FIG. 9). Incidentally, by emitting strobe light when the aperture aperture is stable as shown in FIG. 9, flash photography with good exposure accuracy can be expected.

After that, when the slide lever 30 moves with a delay to the second position where the set lever 20 is stopped, the release portion 23c of the hooking pawl 23 is released by the release pin 31 attached to the upright portion 30d as described above. is pushed downward, and the engagement between the claw portion 23a and the claw portion 40a of the blade opening lever 40 is released. As a result, the blade opening lever 40 is moved by the spring 4.
The shutter rotates counterclockwise in accordance with the bias of 0 (see FIG. 4), the shutter is closed, and the exposure operation is completed.

Since the movement of the set lever 20 up to this point is performed until the gear 3 rotates approximately 2/3 counterclockwise, the gears of the film drive system do not move at all. In other words, the gear 5 is configured such that it does not rotate until the gear 3 makes approximately one rotation in the counterclockwise direction and its output transmitting portion 3a comes into contact with the convex portion 5a.

The subsequent series of operations is performed by the film presence/absence detection circuit 6.
A sequence control circuit 50 performs sequence control as shown in FIG. 8 based on a signal from 6, that is, a signal indicating whether or not a film is loaded. First, we will discuss a case where no film is loaded (a case where no film is loaded in the camera, a trial release operation is performed, and the above-mentioned operations are completed). In this case, the sequence control circuit 50 outputs a signal to the motor control circuit 61 to reverse the motor 1 for a fixed period of time (the time required for the gear 3 to rotate approximately 2/3), and the motor 1 begins to reverse. This causes gear 3 to move clockwise and sun gear 13 to move counterclockwise.
Each rotates, and the planetary gear 15 revolves counterclockwise, and each returns to the state shown in FIG. 1 again.
Further, as described above, as the planetary gear 15 revolves in the counterclockwise direction, it is disengaged from the gear 19, and the set lever 20 and the slide lever 3 are disengaged.
0 again returns to the state shown in FIG. 1 in accordance with the biasing force of springs 22 and 27. At this time, the hooking claw 23 is pressed by the release pin 31 and maintained in a clockwise rotated position, so that the claw portion 23a of the catching claw 23 is connected to the claw portion 40b of the blade opening lever 40 and the charge of the distance ring 36. There is no contact with the portion 36b, and it is possible to smoothly return to the state shown in FIG. 1. Furthermore, during this return process, the rising portion 30c of the slide lever 30 touches the pin portion 38d of the locking pawl 38.
is pressed to disengage the claw portions 38a and 36e one after another, and the distance ring 36 also rotates counterclockwise in accordance with the bias of the spring 37, returning to the state shown in FIG. 1 again.

Next, the case where a film is loaded will be described. When the time required from when the set lever 20 stops at the second position to when the opening/closing operation of the shutter ends and the timer circuit 64 times out, the sequence control circuit 50 sends an instruction to the motor control circuit 61 to reverse the motor 1. A signal is output to the motor control circuit 61, and the motor 1 begins to rotate in reverse. Then, as described above, the gear 3 rotates clockwise and the planetary gear 15 revolves counterclockwise, so that the gear 19 is disengaged, and the set lever 20 and slide lever 30 are disengaged from the springs 22 and 27. According to the momentum, the state shown in FIG. 1 is restored.

When the motor 1 continues to rotate in reverse, the gear 3
The transmission portion 3a contacts the convex portion 5a of the gear 5, and the output of the motor 1 is transmitted to the gear 5 via the gear 3, so the gear 5 begins to rotate clockwise. When the gear 5 begins to rotate clockwise, the sun gear 6 rotates counterclockwise, and along with this, the planetary gear 8 revolves counterclockwise and meshes with the winding gear 11, causing the winding spool to rotate. Up to said motor 1
The output is transmitted and film winding is started. When film winding is started, the film feeding state detection circuit 67 operates to detect the amount of film movement based on the number of perforations, and the timer circuit 65, which starts counting at the same time as the film winding starts, times out. When the film feeding state detection circuit 67 detects that the film has been fed by a specified amount, the sequence control circuit 50 controls the motor control circuit 61.
A signal is output to cause positive current to be applied to the motor 1 for a fixed period of time, and the motor 1 is stopped. This means that one frame of film has been wound.

Also, when all the frames have been photographed, the timer circuit 6
If the film feeding state detection circuit 67 does not detect that the film has been fed by the specified amount even though the time has elapsed in 5, that is, if the film is in a stretched state, the sequence control circuit 50 causes the motor control circuit 61 to to motor 1
A signal is output to cause the film to rotate forward (in the direction of film rewinding). Then, the set lever 20 releases the spring 2.
2 begins to move in the direction of arrow A, the distance adjustment operation and exposure operation are performed as described above, and after the photographing operation for one frame is performed, gear 3 further rotates counterclockwise. Then, as shown in FIG. 5, the transmission portion 3a of the gear 3 comes into contact with the convex portion 5a of the gear 5 from the opposite side, and the gear 5 begins to rotate counterclockwise. When the gear 5 begins to rotate counterclockwise, the sun gear 6 rotates clockwise, and along with this, the planetary gear 8 revolves clockwise and meshes with the rewinding gear 12, leading to a fork (not shown). The output of the motor 1 is transmitted and film rewinding is started.

On the other hand, when the motor 1 rotates forward and the gear 3 rotates counterclockwise, its output is transmitted to the gear 19 via the sun gear 13 and the planetary gear 15, and the set lever 20 moves in the direction of arrow A as described above. Each operation is performed, and the output of the motor 1 is transferred to the gear 19.
, the gear 19 continues to rotate clockwise, and the cam pin 19b attached to the tip of the gear 19 moves into the helical groove 4 of the helical members 45 and 46.
5a and 45b, the gear 1
9 gradually moves upward (see Figure 5),
When the set lever 20 is brought into engagement with the terminal end of the rack portion 20a, the engagement with the rack portion 20a is disengaged. In this way, gear 19 and set lever 2
0, the set lever 20 returns to the state shown in FIG. 1 under the bias of the spring 22.

After that, when the film detection circuit 66 detects that the film has been sufficiently wound into the cartridge, the sequence control circuit 50 outputs a signal to the motor control circuit 61 to reverse the motor 1. The motor 1 reverses by a predetermined amount, and each gear train returns to the state shown in FIG. 1 again. At this time, the spool also rotates, but since the film is no longer wound, the film is not pulled out from the cartridge.

After the film has been rewound as described above, when the photographer opens and closes the back cover to take out the film, the reset lever 47 descends and the helical member 47 is moved down as shown in FIG.
5 and 46, the gear 19 is again lowered to the position shown in FIG. 1, ie, to the position where it engages with the rack portion 20a of the set lever 20, in accordance with a downwardly biased spring (not shown). When the back cover is closed again, the reset lever 47 returns upward under the bias of the spring 49, so that the helical member 45,
46 returns to the state shown in FIG.

According to this embodiment, a planetary gear mechanism consisting of a sun gear 6, a planetary gear 8, etc., which transmits the reverse rotation output of the motor 1 to the hoisting gear 12 and the normal rotation output to the rewinding gear 11, respectively, and the motor. A gear 3 and a gear 5 are disposed between the gear 1 and the gear 1, which transmit the output to the hoisting gear 11 or the rewinding gear 12 via the planetary gear mechanism only when the motor 1 rotates by a certain amount or more. However, when the motor 1 is not rotating more than a certain amount, that is, when the output of the motor 1 is idle with respect to the winding gear 11 or the rewinding gear 12, the output of the motor 1 is used. Since the configuration is such that the distance adjustment operation and exposure operation are performed by
It becomes possible to transmit the forward and reverse outputs of the motor 1 as driving force for operating three or more functions. In addition, any operation can be started by energizing the motor 1 in either direction, so each operation can be controlled freely.
Further, it is possible to control the distance adjustment operation and the exposure operation based on the pulse signal generated as the set lever 20 moves, and the set lever 20 that controls these operations can be controlled.
Since it is possible to automatically return each member to the original position by a single winding operation, it is possible to provide a camera that is inexpensive and has high cost performance.

(Modification) In this embodiment, levers that move linearly, such as the set lever 20 and the slide lever 30, are used.
This may be a member that rotates around one point, and may be a planetary gear as a means for transmitting the output of gear 3 to gear 19, the output of gear 5 to hoisting gear 11, and rewinding gear 12. Although a mechanism is used, a one-way mechanism using a known ball and sinking spring or pawl may be used. Further, although a DC motor is used as a drive source, an ultrasonic motor using a vibrator or the like, a drive means using an electrostrictive element, a drive means using a shape memory alloy, etc. may also be used.

Further, in this embodiment, when the output of the motor 1 is not used for film winding or film rewinding, the output of the motor 1 is used for distance adjustment operation and exposure operation, but this is not limited to this. Instead, it may be configured to be used for zooming operations or barrier opening/closing operations. FIG. 10 shows a schematic configuration diagram when the output of the motor 1 is used for the zooming operation. The same parts as in FIG. 1 are represented by the same symbols. When the gear 19 rotates clockwise and its output is transmitted to the rack portion 101a of the set lever 101, the set lever 101 is moved to the right in the figure by the action of the long groove 101b and the structural member 103 against the bias of the spring 102. Start moving in the direction. When the set lever 101 begins to move in this way, the lens barrel 105, which is guided by the cam portion 101c and holds the zoom lens 104, is guided by the holding member 106 and moves up and down (against the bias of the spring 107). )
The camera moves and the zooming operation begins. Motor 1
When the planetary gears 15 and 19 are disengaged by reversing the rotation and causing the planetary gears 15 to revolve,
The set lever 101 returns to its initial position in contact with the stopper 108 under the bias of the spring 102.

(Effects of the Invention) As described above, according to the present invention, the third camera operating mechanism that operates via the transmission mechanism by driving the drive source in the second direction, and the second
between the transmission mechanism and the third camera operating mechanism, wherein the third camera operating mechanism is operated by driving in the direction, and the third camera operating mechanism is inoperative by driving in the first direction. A clutch mechanism provided in the
The transmission mechanism, when driving the drive source in the second direction,
During the predetermined drive amount from the initial state by the drive source, the second
The camera operating mechanism is set in a non-transmission state, but the third camera operating mechanism via the clutch mechanism is set in a transmission state, and the predetermined amount of drive is applied to the initial state of the third camera operating mechanism. After setting the drive amount to be equal to or greater than the drive amount from the state to the end of the operation, and driving the third camera operating mechanism by rotation of the drive source in the second direction, the position of the drive source in the first direction is set. Since it has a return mechanism that returns the transmission mechanism to its initial state by a certain amount of rotation, output from a single drive source in both forward and reverse directions can be transmitted as driving force for operating three or more functions. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a mechanical configuration diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the positional relationship of each member during distance adjustment operation, and FIG. 3 is a diagram showing the position of each member at the start of exposure operation. Figure 4 is a diagram showing the relationship, and Figure 5 is a diagram showing the positional relationship of each member at the end of the exposure operation.
6 is a diagram showing the positional relationship of each member when the film is rewinded, FIG. 6 is a diagram showing the positional relationship of each member when the back cover is opened and closed, and FIG. 7 is a block diagram thereof. FIG. 8 is a flowchart thereof, FIG. 9 is a diagram illustrating the distance adjustment operation and exposure operation, and FIG. 10 is a mechanical configuration diagram showing a modification of the present invention. 1...Motor, 3, 5...Gear, 11...Hoisting gear, 12...Rewinding gear, 19...Gear, 2
0...Set lever, 22...Spring, 23...Hatch claw, 24...Pulse contact piece, 36...Distance ring, 38...Latching claw, 40...Blade opening lever,
45, 46... Spiral member, 50... Sequence control circuit, 51... Photometry circuit, 53...
Counter, 54... Pulse detection circuit, 55... Coincidence detection circuit, 56... Distance measurement circuit, 58... Counter, 59... Pulse detection circuit, 60... Coincidence detection circuit, 61... Motor control circuit, 62 . . . winding and rewinding circuit, 64, 65 . . . timer circuit, 66 . . . film presence or absence detection circuit, 67 . . . film feeding state detection circuit.

Claims (1)

[Claims] 1. A drive source that can be driven in both a first direction and a second direction, and a first drive source that operates via a transmission mechanism only when the drive source is driven in the first direction. and a second camera operating mechanism that operates via the transmission mechanism only when the drive source is driven in the second direction, and is driven by the rotational direction of the drive source. In a camera in which an operating mechanism is switched, by driving the drive source in the second direction,
a third camera operating mechanism that operates via the transmission mechanism; the third camera operating mechanism is operated by driving the drive source in the second direction; and the third camera operating mechanism is operated by driving the drive source in the first direction. a clutch mechanism provided between the transmission mechanism and the third camera operation mechanism, the clutch mechanism disabling the third camera operation mechanism; During driving, the second camera operating mechanism is in a non-transmission state for a predetermined drive amount from the initial state of the drive source, but the third camera operating mechanism via the clutch mechanism is in a transmission state. the predetermined amount of drive is set to be greater than or equal to the amount of drive of the third camera operating mechanism from the initial state to the end of the operation, and the drive source is rotated in the second direction. After driving the third camera operating mechanism by, by rotating the drive source by a predetermined amount in the first direction,
A camera comprising a return mechanism that returns the transmission mechanism to the initial state. 2. Claim 1, characterized in that a film feeding mechanism for photographing the next frame is used as the first camera operating mechanism, and a lens barrel drive mechanism is used as the third camera operating mechanism. camera.