JPS6242133A - Shutter controller for camera - Google Patents

Abstract

PURPOSE:To perform multistage control over the quantity of exposure at low cost by providing a moving means which determines a shutter opening time according to a stop position and a position setting means which sets the position where the moving means is stopped. CONSTITUTION:A pulse signal is generated by a contact piece 24 fitted to the lower part of a set lever 20 in the process of the movement of the set lever 20 shown by an arrow A and this pulse signal is detected by a pulse detecting circuit 54 and outputted successively to a coincidence detecting circuit 55, which compares it with a digital signal from a counter 53. Then, when the coincidence detecting circuit 55 detects their coincidence, a coincidence signal E is outputted to a sequence control circuit 50 and a motor 1 is powered on reversely to stop abruptly. Therefore, it is considered that the set lever 20 is moved to the 2nd position based upon light measurement information obtained by a light measuring circuit 51.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a shutter control device for a camera that controls the amount of exposure to film.

(Background of the Invention) Cameras that use the output of a motor to charge the shutter have been known, but in addition to the motor, such cameras also have expensive components such as magnets or plungers for controlling the exposure amount. This requires a sophisticated control mechanism, making the camera expensive.

In addition, in recent years, disk cameras have been commercialized that use the output of a single motor to open and close the shutter and advance the film, but since the shutter opening and closing speed can only be set at one speed, only one level of exposure control is possible. could not.

(Objective of the Invention) An object of the present invention is to solve the above-mentioned problems and provide a camera shutter control device that is inexpensive and capable of controlling the exposure amount in multiple stages.

(Features of the Invention) In order to achieve this object, the present invention moves to a stop position set by a driving force transmitted from a driving source,
a moving means that determines a shutter opening time in accordance with the stop position; and a position setting means that sets a position at which the moving means is stopped based on photometric information from a photometric means; The present invention is characterized in that the exposure amount is changed by changing the stop position of the moving means.

(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 positional relationship is partially shifted to make the structure easier to understand. At the tip of the rotating shaft of the motor 1, there is a pinion 1 for transmitting the output generated by the motor 1 to the gear 2 via a reduction gear train (not shown).
a is fixed. The gear 3 is rotatable around a shaft 4 while meshing with the gear 2 and a sun gear described later, and has an output transmitting portion 3a on its lower surface for transmitting output to the gear 5. The gear 5 has a convex portion 5a on the upper surface that contacts the output transmission portion 3a of the gear 3, and a small gear portion 5b on the lower surface that meshes with a sun gear to be described later, as can be seen from FIG. While the gear 3 rotates approximately one rotation in the counterclockwise direction, its output transmitting portion 3a does not come into contact with the convex portion 5a, and the output of the gear 3 is not transmitted, so that it does not rotate during this period.

The sun gear 6, which meshes with the small gear portion 5b of the gear 5, has a planetary gear 8 supported by an arm 7 so as to be able to revolve around the sun gear 6, and a moderate friction torque that prevents rotation of the planetary gear 8. The generated friction spring 9 and spring receiver 10 constitute a planetary gear mechanism, and when the sun gear 6 rotates counterclockwise, the planetary gear 8 revolves counterclockwise and meshes with the winding gear 11. (
In this state, the output of the sun gear 6 is transmitted to a spool (not shown) via the V star gear 8 and the 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 (fifth
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 is
A planetary gear 15. supported by an arm 14 for revolution around the planetary gear 15. Friction spring 16 and spring receiver 1
7 constitute a planetary gear mechanism as described above, and when the sun gear 13 rotates clockwise, the planetary gears 15 revolve clockwise and mesh with gears to be described later (state in FIG. 2). Conversely, when the sun gear 13 rotates counterclockwise, the planetary gears 16 revolve counterclockwise, and the stopper 18
It stops at the position where it touches (the state shown in Figure 1).

The gear 19 controls the output of the planetary gear 15 using the set lever 20.
It is rotatable around a shaft L9a, and a cam pin 19b provided at the tip of the shaft 19a is fitted into a helical member described later. Said set lever 2
0 is moved in the direction of arrow A by the action of the long groove 20b and the structural member 21 fitted in the long groove 20b when the output from the gear 19 is transmitted to the rack part 20a, and the distance is moved by the slide lever and hook pawl described later. # It performs adjustment operation and exposure operation, and is normally biased in the direction of arrow B (see Fig. 1) by a spring 22, so it stops in the state shown in Fig. 1 protruding from a stopper (not shown). +I: A vertical portion 20C1 to which a catch claw 23 is attached to the Yumata set lever 20 is swaged with a pulse contact piece 24 which generates a pulse signal for notifying the movement position of the set lever 20 by a pulse plate (not shown). Hole 20d and adjustment bin 20
E is provided. Further, the set lever 20, J:
A pin 26 that holds one end of a spring 27 that has the role of causing a slide lever, which will be described later, to follow the movement of the set lever 20, is installed in the set lever 20. The set lever 20 is moved to the first position by approximately 2/3 rotation of the gear 3 counterclockwise.
It can be moved from the state shown in the figure to the state shown in FIG.

The hooking pawl 23 is located on the vertical surface 20c of the set lever 20.
It is rotatably supported by a shaft 28, and is constantly biased counterclockwise by a spring 29. In FIG. 1, since the slide lever 30 is pressed by a release pin 31, it remains at the position rotated clockwise. / It is stopped at the position shown in Fig. 2 where it is in contact with the bar. 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 speed faster than the moving speed of the set lever 20. a gear 33 that meshes with the rack portion 30b to move at a slow speed;
It is connected to a known governor mechanism consisting of an escape wheel 34 and an pallet 35. Further, the slide lever 30 has a vertical portion 3 that comes into contact with the end surface 20f of the set lever 20.
0c, a vertical portion 30d that holds the other end of the release pin 31 and the spring 27, and a tensioning portion 30e that comes into contact with a claw portion of a locking claw (described later).

The distance ring 36 is rotatably supported by a base plate (not shown), and normally the spring hook is biased counterclockwise by a spring 37 whose one end is hung on the portion 36a. They are stopped in the state shown in Fig. 1 where they are in contact. Also, the gear 19 rotates, and the set lever 20
When the charging portion 36b is moved in the direction of arrow A, the charge portion 36b is hooked by the claw portion 23a of the hook portion 23 and rotates clockwise against the bias of the spring 37 as shown in FIG. 2.3. At this time, the lens barrel (not shown) is connected to the lead cam 36c.
The photographic lens is focused. The distance ring 36 is also provided with a claw portion 36e that engages with a claw portion 38a of the locking claw 38.

The locking pawl 38 is rotatably supported by a structural member (not shown) fitted into the hole 38b.

The spring hook is always biased clockwise by a spring 39 whose one end is held by the portion 38c, but in the state shown in FIG. and remains in that position. In FIGS. 2 to 5, the slide lever 30 is moved in the direction of arrow A, so the locking pawl 38 rotates clockwise according to the bias of the spring 39, and any pawl of the distance ring 36 The distance ring 36 is engaged with the portion 36e to prevent the distance ring 36 from rotating in the counterclockwise direction.

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 spring 41 is biased counterclockwise to a position where it abuts a stopper (not shown).
In this state, the shutter blade is closed. Further, in the process of moving the set lever 20 in the direction of arrow A, the claw portion 40b is caught by the claw portion 23a of the hooking claw 23, and the blade opening lever 40 is rotated clockwise (in the state shown in FIG. 3). ), at this time the shutter is opened by the action of the bottle portion 40c. The locking pawl 42 is held rotatably around a hole 42a, and is constantly biased clockwise by a spring 43, but in FIG. 1, it hits a stopper 44 and stops at that position. There is. 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. Said set lever 2
A cam portion 42c that releases together with the zero adjustment bin portion 20e is provided.

Since the helical members 45 and 46 are urged in the direction of sticking together by a spring (not shown), and one of the helical members 45 is stopped by a stopper (not shown),
The other helical member 46 collides with the helical member 45, and the positional relationship shown in FIG. 1 is maintained. The helical member 4
5.46, spiral grooves 45a, 46a which fit and hold the cam bin 19b of the gear 19 as shown in FIG.
(grooves 46a are not shown) are formed, and when the gear 19 rotates clockwise, the grooves 45a, 46
Since the cam bin 19b is guided by a and gradually moves upward, the gear 19 resists the bias (downward) of a spring (not shown) to maintain the gear 19 in the state shown in FIG. and moved upward, turning approximately twice (as shown in Figure 5)
At this point, the set lever 20 is disengaged from the rack portion 20a. Also, at this time, as shown in FIG. 5, the cam bin 19b protrudes from the upper surface of the helical member 45, 46, so that it no longer moves upward. Further, recesses 45b and 46b (see FIG. 1) are formed in a part of the abutting portions of the helical members 45 and 46 to provide a slight gap, and the claw portion 47a of the reset lever 47 is inserted into the recesses 45b and 46b. As a result of the insertion, the helical members 45 and 46 rotate in the direction away from each other around the holes 45c and 46c (see FIG. 6), and the cam pin 19b is removed from 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 configured to be slidable in the vertical direction by the action of a shaft 48 and a long groove 47b in conjunction with the opening/closing operation of the back cover (not shown). Since it is urged upward by the spring 49, it is located 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. As mentioned above, gear 1
9 and the rack portion 20a are returned to the engaged state.

FIG. 7 is a block diagram for controlling the drive of each of the members. 50 is a sequence control circuit composed of a microcomputer or the like 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 that holds the digital value from the A/D conversion circuit 52 is connected to the mode 2 while the exposure operation is being performed.
A pulse detection circuit 55 detects the number of pulses generated by the pulse contact piece 24 and a pulse plate (not shown) as the lever 20 moves; 56 is a known distance measuring circuit, and 57 is the distance measuring circuit 5.
58 is a counter that holds the digital value from the A/D conversion circuit 57; 59 is a counter that converts the distance measurement information from 6 into a digital signal; 59 is a counter that holds the digital value from the A/D conversion circuit 57; A pulse detection circuit having the same function as the pulse detection circuit 54 detects the number of pulses generated by the pulse contact piece 24 and a pulse plate (not shown) by the movement of -20; 60 is a digital value from the counter 58; This is a coincidence detection circuit which compares 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 a winding and rewinding circuit that energizes the motor 1 in the film winding direction or the film rewinding direction according to a signal from the motor control circuit 61; 63 is a display circuit that displays each information obtained by the photometry circuit 51 and the distance measurement circuit 56 in the finder; 64 is the set lever 2;
0 stops at the first or second position (details will be described later), until the slide lever 30 reaches that position and the distance adjustment operation or exposure operation is completely completed. 65 is a timer circuit for detecting the state of film tension; 66 is a timer circuit for detecting whether or not the film is in a position facing the aperture; A film presence/absence detecting circuit corresponding to a switch, 67 a film invoice detecting circuit corresponding to a known sprocket switch for detecting the film feeding state, and 68 a known strobe circuit.

Next, the operation will be explained according to the flowchart in FIG. 8 while referring to FIG. A battery check instruction is issued from the circuit 50 to a known battery check circuit, and a 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. Thereafter, when a photometry end signal is generated in the photometry circuit 51, a start signal is output from the sequence control circuit 50 to the distance measurement circuit 56, and the distance measurement 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 is also stored in the A/D conversion circuit 52.57.
are sent to the counters 53 and 58, each converted into a digital signal and sent to the next stage counters 53 and 58.

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. If the photometric information obtained by the photometric circuit 51 is lower than a predetermined EV value (the subject is dark), a strobe charging start signal is output from the mixer control circuit 50 to the strobe circuit 68.

After confirming the information displayed in the viewfinder as described above, the photographer presses the second row (
When the second stroke) is performed, a normal motor rotation instruction signal is output from the sequence control circuit 50 to the motor control circuit 61, and the motor l begins to rotate in the normal direction. 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, etc.
9 and transmits its output to gear 19,
Rotate clockwise.

When the gear 19 rotates clockwise, its output is transmitted to the rack portion 20a, so the set lever 20 begins to move in the direction of arrow A against the bias of the spring 22, thereby sliding against the end surface 2of of the set lever 20. Since the lever 30 comes out of contact with the vertical portion 30c, the slide lever 3
0 also tries to move at the same speed according to the urging force of the spring 27 generated as the set lever 20 moves, but the slide lever 30 is moved by the gear 33 and the escape wheel 34.
Since it is connected to a governor mechanism consisting of a pallet lever 35 and a pallet lever 35, it starts moving at a slower speed than the set lever 20, as shown in FIG.

If the phase of the set lever 20 and the slide lever 30 deviates slightly from the positional relationship shown in FIG.
and the release part 23c of the hooking claw 23 are removed, and the hooking claw 2
3 rotates counterclockwise under the bias of the spring 29 until it comes into contact with a stopper (not shown) as shown in FIG. As a result, the claw portion 23a of the hooking claw 23 and the charging portion 36b of the distance ring 36 become engageable. When the set lever 20 moves further with the hook 23 in this posture, the claw portion 23a of the hook 23 hooks the charging portion 36b of the distance ring 36, and the distance ring 36 resists the bias of the spring 37. Then rotate it clockwise as shown in Figure 2.

Further, 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 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. After that, when a match is detected by the match detection circuit 60, a match signal F is output to the sequence control circuit 50, and as a result, the motor 1 is reversely energized, causing the motor 1 to suddenly stop. The set lever 20 is moved to the first position based on the ranging information obtained by the ranging circuit 56.
For example, if the distance measurement information mentioned above is 1.
If it is 5m, the pulse of ■ as shown in Figure 9,
That is, if the motor 1 is reversely energized at the time when the fifth pulse signal is generated and the motor 1 is abruptly stopped, the set/<-2Q will stop at a position approximately corresponding to the above-mentioned 1.5 m. become. As shown in Fig. 9, the braking distance of the set lever 20 at this time is estimated to be the distance that the set lever 20 moves to the position immediately before the next (sixth) pulse signal is generated. . Further, even if the set lever 20 is stopped in such a state, the biasing force of the spring 22 will not move the set lever 20 in the direction of arrow B 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 bin 31 attached to the vertical portion 30d
As a result, the release portion 23c of the hooking claw 23 is pushed downward, and 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
tries to rotate counterclockwise, but at this time, as the slide lever 30 moves, the spring 39 causes the pin portion 38d to come into contact with the upright portion 30c of the slide lever 30, and rotate clockwise. Since the locking pawl 38 which is rotated in the position shown in FIG. The distance ring 36 remains stationary 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 protrusion of the photographic lens (not shown) changes, and the distance of the photographic lens changes. Focusing, that is, distance adjustment operation is completed.

Sufficient time has passed for the above-mentioned operation to be completed, that is, the set lever 20 has stopped at the first position! When the time required for the photographic lens to be extended to the position according to the distance measurement information at that time has elapsed, and the timer circuit 64 times out, the sequence control circuit 50 again sends the motor normal rotation instruction signal to the motor control circuit 61. is output, and motor 1 begins to rotate forward. When motor 1 starts to rotate in the forward direction in this way, its output is transferred to gear 2, gear 3,
The signal is transmitted to the rack portion 20a of the set lever 20 via the sun gear 13, the planetary gear 15, and the gear 19, and the set lever 20 begins to move further from the first position in the direction indicated by the arrow. When the set lever 20 starts to move in the direction of the arrow A in this way, the slide lever 30 also starts to move slowly in the same direction following it, and a phase difference occurs between the set lever 20 and the slide lever 30. As a result, the release bottle 31 and the release portion 23c of the hook 23 are disengaged, the hook 23 rotates counterclockwise, and the hook 23 is rotated counterclockwise.
The claw portion 23a of No. 3 and the claw portion 40b of the blade opening lever 40 are in an engageable state.

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. When the set plate 20 further moves in the posture 23, the claw portion 23a of the hooking claw 23 hooks the claw portion 40b of the blade opening lever 40, and the blade opening lever 40 is moved by the spring 41.
When the set lever 20 is rotated clockwise against the biasing force of The slide lever 30 that follows
0e engages with the claw portion 42b of the locking claw 42, so the third
-p stop at the position shown in the figure, then turn the set lever
20 advances a little beyond the position shown in FIG. 3, 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 because, for example, when photographing a subject located at 1.0 m, which is the closest distance that this camera can photograph, the distance adjustment operation is completed as described above. This is to eliminate the instability of the start-up characteristics of the motor 1 at the start of the shutter operation in such a case, and the set lever 20 and slide lever 30
This is for the purpose of starting the shutter operation with a phase difference between the two.

Also, as described above, in the process of the set lever 20 moving in the direction of the arrow, a pulse signal (not shown) is generated with the contact piece 24 attached to the lower part (see FIG. 9), and this pulse The signal is detected by the pulse detection circuit 54 and sequentially outputted to the output circuit 55, where it is compared with the digital value from the counter 53. After that, when a match is detected by the match detection circuit 55, a match signal E is output to the sequence control circuit 50, and as a result, the motor 1 is reversely energized, causing the motor 1 to suddenly stop. A second sensor based on the photometric information obtained by the distance measuring circuit 51
The set lever 20 has moved to the position 0. For example, if the photometric information (subject brightness) mentioned above is EV12, the pulse of 0, that is, 1, as shown in FIG.
When the motor 1 is reversely energized at the time when the third pulse signal is generated and the motor 1 is suddenly stopped, the set lever 20 stops at a position approximately corresponding to the EV 12,
At this time, the blade opening lever 40 rotated clockwise by the claw part 23a of the hooking claw 23 moves the shutter (not shown) to the ninth position.
It stops in the state where it is opened to the diameter of Fl as shown in the figure. This starts the exposure of the film surface.

By the way, suppose that the photometric information obtained by the photometric circuit 51 is sent to the sequence control circuit 504. : Therefore, if it is determined that the brightness is lower than a predetermined brightness, a strobe light emission signal is sent from the sequence control circuit 50 to the strobe circuit 6 shortly after the set lever 20 stops.
8, and the strobe light will be emitted (see Figure 9).It should be noted that flash photography with good exposure accuracy is required when the strobe light is emitted when the aperture aperture is stable as shown in Figure 9. You can expect it.

After that, when the slide lever 30 is delayed and moves to the second position where the set lever 20 is stopped,
As mentioned above, the release portion 23c of the hooking claw 23 is pushed downward by the release pin 31 attached to the vertical portion 30d.
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 rotates counterclockwise according to the bias of the spring 40 (see Fig. 4).
Then, the shutter is closed and the exposure operation ends.

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, that is, the gear 5
This is because the gear 3 is configured not to rotate until it makes approximately one rotation in the counterclockwise direction and its output transmission portion 3a comes into contact with the convex portion 5a.

The subsequent series of operations are controlled in the sequence shown in FIG. 8 by the sequence control circuit 50 in response to a signal from the film presence/absence detection circuit 66, 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 determines that the gear 3 is approximately 2
/3 time required to rotate) A signal is output to the motor control circuit 61 to reverse the motor 1, 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.

Furthermore, as the planetary gear 14 revolves counterclockwise as described above, it disengages from the gear 19, and the set lever 20 and slide lever 30 also spring 22 and 27.
The state shown in FIG. 1 is restored again according to the biasing force. At this time,
Since the hooking claw 23 is pressed by the release pin 31 and maintained in a clockwise rotated position, the claw portion 2 of the hooking claw 23
3a does not come into contact with the claw portion 40b of the blade opening lever 40 or the charging portion 36b of the distance ring 36, 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
presses the pin portion 38d of the locking pawl 38 and disengages the pawl portion 38a and the pawl portion 36e one after another, so the distance ring 36 also rotates counterclockwise in accordance with the bias of the spring 37 and returns to the first position.
Return to the state shown in the figure.

Next, we will discuss the case where film is loaded. When the time required from when the set lever 20 stops at the second position until the shutter opening/closing operation is completed and the timer circuit 64 times up, the sequence control circuit 50 outputs a signal to the motor control circuit 61 to reverse the motor l, and the motor 1 begins to 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 released from the springs 22 and 27. According to the bias, the state shown in FIG. 1 is restored.

When the motor l continues to rotate in the reverse direction, the transmission part 3a of the gear 3 comes into contact with the convex part 5a of the gear 5, and the transmission part 3a of the gear 3 comes into contact with the convex part 5a of the gear 5.
Since the output of the motor 1 is now transmitted through the gear 5, the gear 5 begins to rotate clockwise. When the gear 5 begins to rotate clockwise, the sun gear 6 rotates counterclockwise, and the planetary gear 8 accordingly revolves counterclockwise and meshes with the winding gear 11, causing the winding spool to rotate. up to said motor l
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 specified amount of film has been fed, the sequence control circuit 50 outputs a signal to the motor control circuit 61 to cause the motor 1 to be energized for a fixed period of time, and the motor 1 is activated. Stop. This means that one frame of film has been wound.

In addition, even though all the frames have been photographed and the timer circuit 65 has timed up, the film feeding state detection circuit 6
7, if it is not detected that the film has been fed by the specified amount, that is, if the film is stretched,
Motor control circuit 6 from sequence control circuit 50
A signal is output to cause the motor l to rotate forward (in the film rewinding direction). Then, the set lever 20 releases the spring 2.
2 begins to move in the direction of arrow A, and the distance adjustment operation and exposure operation are performed as described above.

- When the gear 3 further rotates counterclockwise after the photographing operation for each frame has been performed, the transmission section 3a of the gear 3 is moved from the opposite side of the convex section 5a of the gear 5 to the contact point as shown in FIG. They come into contact with each other, and 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, and is moved 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. When each operation is performed and the output of the motor l is further transmitted 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 shape of the helical members 45 and 46. Groove 4
5a and 45b, the gear 19 gradually moves upward (see FIG. 5), and when it is engaged with the end of the rack portion 20a of the set lever 20, the gear 19 is engaged with the end of the rack portion 20a of the set lever 20. The mesh becomes disengaged. When the gear 19 and the set lever 20 are disengaged in this manner, the set lever 20 returns to the state shown in FIG. 1 under the bias of the spring 22.

After that, when the film existence detection circuit 66 detects that the film has been sufficiently wound into the cartridge, the sequence control circuit 50 sends a signal to the remote control circuit 61.
A signal is outputted to cause the motor 1 to reverse, thereby causing the motor 1 to reverse 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 members 45 and 47 are moved as shown in FIG. In order to pry open the set lever 20, the gear 19 moves back to the position shown in FIG.
It descends to the position where it engages. When the back cover is closed again, the reset lever 47 returns upward under the bias of the spring 49, so that the helical members 45, 46 return to the state shown in FIG. 1 again.

FIG. 1O shows another embodiment of the invention. The gear lot connects the normal rotation output from a motor (not shown) to the rack section 10.
2a to the set lever 102, and when the motor rotates in reverse, it disengages from the rack portion 102&. The set lever 102 is usually a spring 10.
However, as the gear 101 begins to rotate counterclockwise, it begins to move rightward in the figure due to the action of the long groove 102b and the structural member 105. At this time, a pulse signal indicating the movement position of the set lever 102 is generated by a pulse contact piece and a pulse plate (not shown). The lever 106 is the set lever
102 so as to be rotatable about a shaft 107, is always biased counterclockwise by a spring (not shown), and includes a claw portion 106a and a trapezoidal portion tosb.

The slide lever 108 moves in accordance with the movement of the set lever 102 due to the action of the long groove 108a and the structural member 110 in accordance with the bias of the spring 109.
Since a known governor mechanism 111 is connected to the rack portion 108b, the slide lever 108 starts moving at a slower speed than the set lever 102.
is a convex portion 108C that comes into contact with the trapezoidal portion 106b and an upright portion 1 that comes into contact with the end surface 102c of the set lever 102.
It is equipped with 08d. The return lever 112 is usually a spring 11
However, when the set lever 102 starts to move rightward with the lever lO6 rotated counterclockwise, the claw portion 106a
The claw portion 112a is hooked on and begins to move rightward in the figure due to the action of the long groove 1tzb and the structural member 115.

The hooking claw 116 is rotatably attached to the return lever 112 about a shaft 117, and is always biased clockwise by a spring (not shown), and has a claw portion 116a and a hook portion 116a for hooking the claw portion of the blade opening lever, which will be described later. Zero blade opening lever 1 comprising a stopper 118 and a trapezoidal part ttsb that comes into contact with it
Reference numeral 19 opens and closes a shutter (not shown), and the claw portion 11
9a, 119b, 119c and wing opening bin part 119
d, and since it is normally biased by a spring 120, it rotates clockwise about a shaft 121 and comes into contact with a stopper 122.

Next, the operation will be explained. As in the previous embodiment, when the output from the motor is transmitted to the gear 101 and the gear lot rotates clockwise, the set lever 102 begins to move to the right. As it advances a little further, a phase difference occurs between the lever 106 and the slide lever 108, and the lever 106 rotates counterclockwise.
06a comes to engage with the claw portion 112a of the return lever 112. Therefore, the return lever 112 is also similar to the set lever.
102 and starts moving in the same direction.

Thereafter, as in the aforementioned embodiment, when it is detected that the number of pulse signals generated as the set lever 1O2 moves and the EV value obtained by the photometric circuit (not shown) matches, and the motor is stopped, The set lever 102 also stops moving in the right direction, and at this time, the claw portion 116a of the hooking claw 116 engages with one of the claw portions of the blade opening lever 119, thereby causing the photometry obtained by the photometry circuit (not shown). The shutter opening state corresponding to the EV value is determined.

After that, the slide lever 108 is set to /<-10.
2, the convex portion 108c pushes the trapezoidal portion 106b of the lever 106 and rotates the lever 106 clockwise, so that the claw portion 112a of the return lever 112(7)
The engagement with the claw portion 106a of the lever 106 is disengaged, and the return lever 112 begins to move leftward in the figure according to the bias of the spring 113. At this time, the claw portion 116a of the hooking claw 116 and one of the claw portions of the blade opening lever 119 are in a state of engagement, so that the blade opening lever 119 is connected to the return lever 1.
12 and rotates counterclockwise to open the shutter. When the return lever 112 returns to the position immediately before returning to the position shown in FIG.
Since the trapezoidal portion 116b contacts the stopper 118 and rotates counterclockwise, the hooking pawl 116 and the blade opening lever 119 are disengaged, and the blade opening lever 119 is disengaged.
The shutter rotates clockwise according to the bias of the spring 120, and the shutter is closed.

When the above-mentioned operation is completed, the motor (not shown) starts to rotate in reverse, so that the gear 101 and the set lever 102 are disengaged as in the previous embodiment, and the set lever 102
The slide lever 108 returns to the position shown in FIG. 10 under the bias of the springs 103 and 109.

In this embodiment, the output of the motor is used indirectly, that is, the output of the motor is used to charge the shutter, and the return operation is used to open and close the shutter. It becomes possible to open the shutters on the street.

According to the embodiments of FIGS. 1 to 11, the set lever is controlled by the pulse signal generated as the set lever moves and the photometric information obtained by the full optical circuit.
Since the shutter opening time is determined by setting the stop F position, an expensive control mechanism such as a magnet is not required as in the conventional case, and the device is inexpensive. Furthermore, since the opening time of the shutter can be determined at the stop position of the set lever, it is possible to control the exposure amount in multiple stages.

(Correspondence between Invention and Embodiment) In this embodiment, the photometric circuit 51 is used as a photometric means, the one-blade opening lever 40 is used as a shutter opening/closing means, and the safety lever 20 is used as a shutter opening/closing means.
and the hooking claw 23 is the moving means, and the pulse tJ? piece 24,
The sequence control circuit 50, the counter 53, the pulse detection circuit 54, the -bed stacking circuit 55, the counter 58, the pulse detection circuit 59, and the -bed stacking circuit 60 respectively correspond to position setting means.

(Modification) In this embodiment, the set lever 20, the slide lever 30
I used something that moves in equal straight lines.

This may be a member that rotates around one point, and the output of gear 3 is sent to gear 19, and the output of gear 4 is sent to gear 1 for hoisting gear.
1. Although a planetary gear mechanism is used as a means for transmitting data to the rewinding gear 12, a one-way mechanism using a publicly known pole and sinking spring or pawl may also be used.Furthermore, a DC motor may be used as the drive source. However, for example, an ultrasonic motor using a vibrator or the like, a driving means using an electrostrictive element, a driving means using a shape memory alloy, etc. may also be used.

(Effects of the Invention) As explained above, according to the present invention, the movement to the stop position set by the driving force transmitted from the driving source,
a moving means that determines a shutter opening time in accordance with the stop position; and a position setting means that sets a position at which the moving means is stopped based on photometric information from a photometric means; Since the stop position of the moving means is changed to change the exposure amount, it is possible to control the exposure amount in multiple stages at low cost.

[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 the eight members during distance adjustment operation, and Fig. 3 is a diagram showing the positional relationship of the eight members at the start of the exposure operation. Figure 4 is a diagram showing the positional relationship of each member at the end of the exposure operation, Figure 5 is a diagram showing the positional relationship of each member at the time of film rewinding, and Figure 6 is a diagram showing the positional relationship of each member at the end of the exposure operation. A diagram showing the positional relationship of each member when the lid is opened/closed, FIG. 7 is a block diagram of the turn, FIG. 8 is a flowchart, and FIG. 9 is a diagram showing the distance adjustment operation and exposure operation. 10 is a mechanical configuration diagram showing another embodiment of the present invention,
FIG. 11 is a diagram similarly explaining the shutter opening waveform. 1...Motor, 3, 5...Gear,]
1...Rewinding gear, 19...Gear, 20...Set lever-522... Spring, 23... Hook claw, 24... Pulse contact piece, 36...
Distance ring, 38...Latching claw, 40...
・Blade opening lever, 45.46... Spiral member, 50... Sequence control circuit, 51
...Photometering circuit, 53...Counter, 5
4... Pulse detection circuit, 55... Coincidence detection circuit, 56... Distance measuring 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/absence detection circuit, 67...Film feeding state detection circuit,
101... Gear, 102... Set lever - 1106... Lever, lO8...
Slide 1//<-, 112...Return lever,
116...Hook claw, 119...Blade opening lever.

Claims (1)

[Claims] 1. In a camera shutter control device that is equipped with a photometry device that detects subject brightness and a shutter opening/closing device that opens and closes the shutter, the device moves to a stop position set by a driving force transmitted from a driving source, and Shutter control for a camera, comprising a moving means that determines a shutter opening time according to the position, and a position setting means that sets a position at which the moving means is stopped based on photometric information from the photometric means. Device.