JPH02106729A - Automatic focusing and exposure activating device for camera - Google Patents

Abstract

PURPOSE:To simplify a structure and to improve exposure accuracy by employing a blade opening/closing mechanism activated in such a way that the blade is opened according to a phase difference between the driving member and the distance member. CONSTITUTION:A driving ring 6 is driven and turned around an optical axis 5 in both normal and reverse directions by means of a stepping motor; when the driving ring 6 turns, the distance ring 7 turns together with the driving ring 6 in the same direction as well. In the axis parts 6b and 6c of the circumferential parts of the driving ring 6, the ends of sectors (blades) 9 and 10 are pivotally supported and activation holes 9a and 10a are formed on the side of the optical axis 5 away from the axis parts 6b and 6c of the sectors 9 and 10. The pins 7a and 7b of the distance ring 7 are fitted with the activation holes 9a and 10a, respectively; the sectors 9 and 10 are rotated and activated by means of the relative rotation of the distance ring 7 and driving ring 6, thereby opening/closing a shutter opening 20. This simplifies the structure and improves exposure accuracy, as well.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic focus/exposure operating device for a camera.

[Conventional technology]

As a conventional automatic focus/exposure operating device for a camera, for example, Utility Model Application No. 63-2079, which was filed by the applicant of the present invention, is known.
There is something that was published in the specification and drawings of No. 3.

This conventional camera automatic focus/exposure operating device allows the camera to immediately switch to exposure operation after the lens focus operation is completed, thereby significantly reducing wasted time between lens drive and blade opening/closing operations. As a result, it is possible to provide an automatic focus/exposure operating device for a camera that is suitable for rapid shooting and the like.

[Problem to be solved by the invention]

However, in the conventional example described above, there are many intermediate members such as the gear of the drive ring, one-way clutch, edge frame, and sector to open and close the sector, resulting in a complex structure and poor exposure accuracy. There is a problem in that the error becomes larger and the torque load for driving the lens increases because two loads are applied to the motor when driving the lens: one for passing over the ratchet pawl and one for passing over the one-way clutch.

[Means to solve the problem]

Therefore, in order to solve the problem mentioned above, the present invention includes a motor controlled by a control circuit, a driving member driven by the rotation of this motor, and a lens focusing mechanism that moves in one direction together with this driving member. a distance member that drives the
a ratchet pawl that locks the distance member and prevents it from moving in the other direction after a focusing operation; and a ratchet pawl that engages the distance member after a focusing operation in which the driving member drives the distance member in one direction. The blade opening/closing mechanism operates to open the blades based on the phase difference between the driving member and the distance member when the driving member stops and moves in the other direction.

[For production]

According to the above structure, fewer members are interposed in the middle compared to the conventional example, so the structure can be simplified and the exposure accuracy can be improved, and the one-way clutch like the conventional example can be simplified. Since this is not required, the load on driving the lens can be reduced.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. 1 to 8 are diagrams showing a first embodiment of an automatic focus/exposure operating device for a camera according to the present invention.

In FIG. 1, 2 is a gear, and this gear 2 rotates together with a rotor shaft 1 of a step motor whose rotation is variably controlled in forward and reverse directions by a control circuit not shown. An intermediate gear 4Q large-diameter tooth portion 4a that is pivotally supported on a shaft 3 meshes with the gear 2.
The small-diameter tooth portion 4b of the intermediate gear 4 meshes with a tooth portion 6a on the outer periphery of a drive ring 6 (driving member). Further, the drive ring 6 is driven to rotate in both forward and reverse directions around the optical axis 5 by a stem motor. Shaft portions 6b and 6c are provided at two locations around the drive ring 6, and these shaft portions 6b.

From 6c to 'i', two elongated holes with contact parts 6d are formed in the inner diameter h', and furthermore, a cam part 6e is formed on the right side in the figure at the circumference of the drive ring 6. .

A distance link 7 (distance member) is provided on the axial ridge of the drive ring 6 and the same optical axis 51, and this distance sub ring 7 (
By rotating around the J optical axis 5, a lens portion (not shown) can be moved in the axial direction of the optical axis 5. Pins 7a and 7b that protrude toward the drive ring 6 are formed on the back side of the distance ring 7 in the figure, and these pins 7a and 7
b fits into two elongated holes that connect the contact portion 6d of the drive link 6.

The distance link 7 also has ratchet teeth 7e on its circumference, and a cam portion 7 formed at the end of the ratchet teeth 7e.
C and a switch actuating section 7d. A spring 8 is interposed between the cam portion 7C of the distance link 7 and the drive ring 6, and this spring 8 rotates the distance ring 7 clockwise with respect to the drive link 6, and pin 7a,
7b is positioned by abutting against the contact portions 6d of the two elongated holes of the drive ring b.

On the back side of the drive ring 6 in the figure, there are two shaft parts 5b on its circumference.
, 5c is pivotally supported by the end of sector (blade) 9.10,
The optical axis 5 from the shaft portions 6b and 6c of these sectors 9 and 10
Operating holes 9a and 10a are formed on each side. Since the pins 7a and 7b of the distance ring 7 are fitted into these operating holes 9a and 10a, the relative rotation of the distance ring 7 and the drive ring 6 causes the sector 910 to rotate and open and close the opening 20. It has become.

As shown in FIG. 8, the pin 7 provided on the distance ring 7
A (7b) has a stepped portion 7f formed in the middle, and the shaft portion below the stepped portion 7f in the figure is eccentric with respect to the −L direction shaft portion. The shaft portion of the pin 7a (7b) from the stepped portion 7f in the figure contacts the drive ring 6, and the shaft portion below the stepped portion 7f in the figure contacts the operating hole 10a (9a) of the sector 10 (9). They are mated.

Such pins 7a and 7b of distance ring 7.

The operating holes 9a and 10a of the sectors 9 and 10 and the shaft portions 6b and 6c of the drive ring 6 are collectively connected to the blade opening/closing I of the sector 910.
& Makes up the sides.

An assembly width detection switch 11 is provided near the lower left of the drive ring 6 in FIG. When the switch is returned, the switch actuating portion 7d is contacted and turned off.

Near the upper right of the distance ring - is the Racheno claw 1.
3 is provided rotatably supported on a shaft 12, and this ratchet pawl 1
3, the claw portion 13a at the tip thereof engages with the ratchet claw 7e of the distance ring 7 when it rotates counterclockwise.

A square locking portion 13b is formed protruding from the rear side of the rear end of the ratchet pawl 13 in the figure, and a spring 14 is also provided at the rear end of the ratchet pawl 13 between it and the stationary portion. The ratchet pawl 13 is biased counterclockwise.

A pawl position detection switch 15 is provided near the rear end of the ratchet pawl 13, and when the ratchet pawl 13 rotates clockwise, the lower surface of the locking portion 13b comes into contact with the pawl position detection switch 15. It is turned OFF.

Similarly, a locking pawl 17 is provided near the rear end of the ratchet pawl 13, which is pivotally supported by a latch 16, and when the locking pawl 17 rotates clockwise, the pawl at the tip of the pawl 17 rotates clockwise. 17a
The upper surface of the locking portion 13b of the ratchet pawl 13 is locked. The rear end of the locking pawl 17 has a pin portion 17b, and when the pin portion 17b is pressed by the cam portion 6e of the drive ring 6 to rotate counterclockwise, the pawl portion 1
7a is removed from the upper surface of the locking portion 13b of the ratchet pawl 13. Further, the locking pawl 17 is biased clockwise by a spring 18 provided in the middle thereof.

A pin 19 fixed on a base plate (not shown) is provided near the rear of the drive ring 6, and the cam portion 6e of the drive ring 6
The stepped portion comes into contact with this pin 19, thereby preventing excessive movement of the drive ring 6.

Next, the effect will be explained. The rotation of the step motor is decelerated from the gear 2 by the intermediate gear 4 and transmitted to the toothed portion 6a of the drive ring 6, and the drive ring 6 first rotates counterclockwise (one direction) in FIG. 1. Then, the distance ring 7 also rotates in the same direction as the drive ring 6 by the contact parts 6d of the two elongated holes of the drive ring 6 pushing the pins 7a and 7b, and at this time, the ratchet teeth 7 of the distance ring 7
Part e is also sent in the same direction by moving the claw part 13a up and down (
Figure 2).

Immediately after the distance ring 7 starts rotating in this manner, the switch actuator 7d or the return detection switch is turned on by moving away from the return detection switch 11 and inputting a rotation start signal to a control circuit (not shown). Time chart A) in Figure 6.

The distance ring 7 rotates around the optical axis 5 to move a lens section (not shown) in the axial direction of the optical axis 5, and the step motor is driven for a predetermined pulse interval based on the focusing signal input by the control circuit. By doing this, the drive ring 6 is rotated so that the lens section moves a predetermined amount to the position where the lens is in focus (T - T and P - in Fig. 5).
P2).

Upon completion of this focusing operation, the control circuit immediately reverses the step motor to rotate the drive ring 6 in the opposite direction (the other clockwise direction).

After this reversal starts, one of the ratchet teeth 7e of the distance ring 7 engages with the pawl portion 13a of the ratchet pawl 13, and the distance ring 7 is prevented from rotating in the opposite direction (clockwise direction), and the lens portion is rotated in the opposite direction (clockwise direction). The focus position is maintained at the time of shooting. Therefore, the drive ring 6 rotates clockwise against the spring 8, and its shaft portions 6b and 6c also rotate in the same direction.

When the drive ring 6 rotates relative to the distance ring 7 in this way, the pin 7a of the distance ring 7.

7b is stopped and the shaft portions 6b, 6c of the drive ring 6 are rotated, whereby the operating holes 9a, 10a of the sectors 9, 10 are stopped, and the sector 9 supported by the shaft portions 6b, 6c of the drive ring 6 is rotated. , 10 rotates, sector 9
．． 10 rotates to open and close the shirt opening 20.

That is, based on the exposure detection signal input to the control circuit, as shown in FIG.
When the shutter is opened (T-T2゜■ P2 to P1 in Fig. 5), the step motor controlled by the control circuit immediately rotates the drive ring 6 in the opposite direction (counterclockwise direction) to move the sectors 9 and 10 to the shutter stop. Close the opening 20 (
T to T, P to P2 in FIG.

Even after the sector 910 closes the shutter opening 20, the drive ring 6 continues to rotate counterclockwise, and eventually its abutting portion 6d pushes the pins 7a and 7b, causing the distance ring 7 to be aligned with the drive ring 6 again. The ratchet teeth 7e of the distance ring are also sent in the same direction.

Then, after the ratchet tooth 7e section is sent in the same direction while finely moving the ratchet pawl 13 up and down, the cam section 7
C lifts the claw part 13a higher than before and releases the spring 1.
4, the ratchet pawl 13 is largely rotated in the clockwise direction. Therefore, the locking pawl 17 can be rotated clockwise by the spring 18, and as shown in FIG. Then, the pawl portion 13a of the ratchet pawl 13
Separate them so that they do not get caught on the ratchet teeth 7e and maintain that position (T3-T, P-P3 in Figure 5)
.

Immediately before such locking, the lower surface of the locking portion 13b of the ratchet pawl 13 contacts the pawl position detection switch 15 and the
FF (time chart B in Figure 6).

Therefore, the distance ring 7 can rotate clockwise together with the drive ring 6, and the distance ring 7 is rotated clockwise by the step motor that rotates in reverse under the control of the control circuit that receives the OFF signal from the pawl position detection switch 15. and rotate clockwise to return to the initial position (
T −T , P, -Po in FIG. 5).

By the way, distance ring 7 returns to the initial position 1tf
7d of the distance ring 7 or the return detection switch 1] to turn off the return detection switch 11 (time chart l-A in Fig. 6), a return signal (OFF signal) is sent to the control circuit. ) to return to the initial state.

Similarly, just before the distance ring 7 returns to its initial position, the cam portion 6e or pin portion 17b of the drive ring 6 is pressed to rotate the latch 1F pawl 17 counterclockwise in the direction J, so that the latch pawl 17 The pawl portion 17a of the ratchet pawl 13 separates from the upper surface of the locking portion 13b of the ratchet pawl 13, and the ratchet pawl 13 or the spring 14
The pawl portion 13a of the ratchet pawl 13 is rotated counterclockwise in the counterclockwise direction of JI'', and its pawl portion 13a locks on the ratchet teeth 7e of the distance ring 7 at the initial position (Fig. 1).For this reason, the locking portion 13b of the ratchet pawl 13 When the switch is turned ON at a distance from the claw position detection switch 15 (time chart B in Fig. 6), control 1!''! Input the claw position detection signal to path 1.

As shown in FIG. 6, the detection states of the return detection switch 11 (A) and the pawl position detection switch 15 (B) are confirmed in the control circuit at the arrow positions shown in the figure, and after confirmation, the next control procedure proceeds. It will be done. Especially during the return operation of the drive ring 6 and distance ring 7 to their initial positions, as shown in the figure,
Verification is performed frequently at predetermined intervals. In case the locking claw 17
If the locking of the ratchet pawl 13 is released during the return operation, the return operation of the distance ring 7 is prevented by the ratchet pawl 13, and relative rotation occurs between the drive ring 6 and the distance ring 7, causing the sector 9 This is to prevent .10 from opening.

If the confirmation results from each detection switch are different from the expected results, it is determined that there is a malfunction as shown in "-" and a sequence operation for reset is performed. For example, if the return detection switch 11 is supposed to turn on at the initial stage of operation, but the signal is not obtained, as shown in FIG. After being rotated and sent to the state shown in FIG. 4, the distance ring 7 and the drive ring 6 are returned to their initial positions. Even during this return operation, the detection state of the detection switch is frequently checked at predetermined intervals.

However, in the same figure, PA is p − in FIG.
p, that is, the total stroke of the drive ring 6, and P
B indicates P - P in the figure, that is, the return stroke of the distance link 7 to its initial position. P-1 in FIG. 6 is the position when the drive ring 6 is reversed from the right to fully open the sector opening 20 when the distance ring 7 is locked by the initial pawl with a small amount of operation. (reverse rotation stop position), and at this time, the drive ring 6 needs to rotate in the opposite direction (clockwise direction) from the initial position shown in FIG. Therefore, the total stroke of the drive ring 6 and the return stroke of the distance ring 7 to the initial position are P
There is a difference of 1 to Po.

The automatic focus/exposure operating device of such a camera uses the rotational phase difference between the drive ring 6 and the distance link 7 to control the sector 9,
10, so when adjusting the exposure, use pin 7a,
All you have to do is rotate 7b.

This is because, as mentioned above, the pins 7a and 7b are eccentric from the intermediate step 7f to the shaft part, so the pins 7a and 7b are eccentric.
When rotated, its eccentric shaft rotates eccentrically and rotates sector 10.
．． You can adjust the positional relationship with 9. Since the shaft portion on the opposite side to the stepped portion 7f is not eccentric, the pin 7a7b does not rotate eccentrically with respect to the drive ring 6 during adjustment, and therefore, the phase of the 7a and 7e is not eccentric. It is possible to prevent it from shifting and not being retained by the regular claw.

FIG. 9 shows a second embodiment of the present invention.

In the first embodiment, the distance ring 7 was composed of one piece, whereas in the second embodiment, an actuation ring is provided in addition to the distance ring for driving the lens, and this actuation ring is connected to the sector. They differ in that they engage with each other.

That is, in the same figure, the distance ring 26 can be rotated to move the lens portion in the axial direction of the optical axis, and the distance ring 26 has an elongated hole having an abutting portion 26a;
Switch actuator 26 that actuates the return detection switch 11
d. Press the pin part 17b of the locking claw 17 to release the claw part 17.
A release cam portion 26e is formed to release the locking portion 13b of the ratchet pawl 13 from the upper surface of the locking portion 13b.

Further, the distance ring 26 is urged by a spring 8 interposed between the distance ring 26 and the drive ring 6 to rotate clockwise with respect to the drive ring 6.

A tension determining portion 26f is formed on the side of the switch actuating portion 26d, and the tension determining portion 26f can come into contact with a stopper pin 6f provided upright on the drive ring 6.

The distance ring 26 connects to the actuating ring 25 provided overlappingly via an eccentric pin 27 that abuts the contact portion 26a of the elongated hole.
The eccentric pin 27 is semi-fixed to the actuating ring 25 by press fitting or the like. Pins 25a and 25b that protrude toward the drive ring 6 are formed on the back side of the actuation ring 25 in the figure, and these pins 25a and 25b are fitted into elongated holes at two locations on the drive ring 6 having a contact portion 6d. It matches. Additionally, ratchet teeth 25 are provided around the circumference of the actuation ring 25.
e, and a cam portion 25c formed at the end of the ratchet tooth 25e.

In the second embodiment, the actuation ring 25 is provided separately from the distance ring 26, so even if the distance ring 26 turns by carelessly turning the lens by hand, the actuation ring 25 will not turn. , sectors 9 and 10 can be prevented from being opened. The distance between the distance determining portion 26f and the stopper pin 6f is sufficient as long as it can ensure the entire stroke of the shutter, and the distance between the end of the elongated hole of the distance ring 26 opposite to the contact portion 26a and the stopper pin 6f is sufficient.
The distance between the two may be made larger than that.

In addition, in the first embodiment, the cam portion 6e of the drive ring 6 presses the pin portion 17b of the locking pawl 17 to separate the pawl portion 17a from the upper surface of the locking portion 13b of the ratchet pawl 13. However, according to the second embodiment, the release cam portion 26e formed on the distance ring 26 presses the pin portion 17b to release the claw portion 17a from the locking portion 13b. Even if the distance from the initial position to the first (first) ratchet tooth 25e is shortened, the exposure operation can be performed properly.

That is, in order to shorten the time from the release button actuation to the opening of the shutter, in the case of the first embodiment, the distance from the initial position to the first ratchet tooth 25e is shortened, as shown in FIG. As shown by the dashed line,
The drive ring 6 is set to P after the focusing operation in order to perform a predetermined exposure.
. The cam portion 6e of the drive ring 6 frequently presses the pin portion 17b of the locking pawl 17, and the biasing force of the spring 18 at this time causes the exposure operation to occur. becomes unstable, making it impossible to properly perform a predetermined exposure.

On the other hand, according to the second embodiment, since the drive ring 6 is not provided with a cam portion that presses the pin portion 17b of the locking pawl 17, the first ratchet tooth 25e is moved from the initial position.
Exposure can be performed properly even if the distance is shortened.

Further, in this second embodiment, since the distance ring 26 is engaged with the actuation ring 25 via the eccentric pin 27, the lens can be easily adjusted.

10 to 13 show a third embodiment of the present invention.

In the first and second embodiments, the lens section is of a helicoid type (spiral type, moving while spiraling), but in this third embodiment, the lens section is of a linear type. be.

That is, in FIG. 10, ratchet teeth 107d divided into three groups are formed on the circumference of the distance ring 107, and three cam portions 107a are formed on the surface opposite to the drive ring 106. . A lens member (not shown) is disposed on the cam portion 107a side of the distance ring 107, and this lens member is of a so-called straight type.
By rotating a, it is possible to move in the direction of the optical axis 105.

The mechanism and operation by which the sectors 109 and 110 open and close the shirt opening 116 are the same as in the first embodiment. Further, a spring 108 is interposed between the drive ring 106 and the distance ring 107 to urge the distance cutting link 107 to rotate in the poetry direction with respect to the drive ring 106.

FIG. 10 shows an initial position, and when the gear 102 is rotated counterclockwise (one direction) by a step motor from the initial position, the large-diameter tooth portion 104a and both small-diameter tooth portions of the intermediate gear 104 are rotated. After being decelerated by 104b, the speed is transmitted to the teeth 106a of the drive ring 106, causing the drive ring 106 to rotate counterclockwise.

At this time, the contact portion 10 of the two holes of the drive link 106
By pushing the bottles 107b and 107c, the distance ring 107 is also moved in the same direction as the drive ring 106.
Sushi, distance ring] 07 ratchet teeth 107
Section d is also sent in the same direction (FIG. 11). When the focus signal is sent to the ratchet tooth 107d of the distance ring 107 or a predetermined position based on the focusing signal input from the control circuit (1 in FIG.
゛ ~T, P-P), gear 102 is reversed 0 ] 0
2 (7) Start rotating clockwise (other direction), and the ratchet y
One of the teeth 107d is engaged with the pawl portion 113a of the ratchet pawl 113.

At this time, the cam portion 10 of the lens member or the distance ring 107
7a, and immediately after the lens member is moved by a predetermined amount in the direction of the optical axis 105 to a position where the lens is focused by a predetermined rotation of the distance ring 107, the ratchet tooth 107
One of the pawls d is engaged with the pawl portion 113a of the ratchet pawl 113.

Further, as gear 102 continues to rotate clockwise, drive ring 106 rotates in the same direction. At this time, since the distance ring 107 has its ratchet teeth 107d locked with the claw portion 113a of the ratchet claw 113,
Leave the drive ring 106 or the distance ring 107 and remove the spring 10.
Rotate against 8. At this time, the pins of the distance ring 107 ], 07b 107c are fixed and the sector 10911
0 operating hole 109a, 1], Oa is locked, and the sector 10
9, 110] Since the shaft part 106b]06C rotates in the poetry direction, as shown in FIG. 12, the sector 1.0
9. Rotate clockwise at 110 degrees to open the shirt opening 116 (T-T, P-P in Figure 13).

Immediately after a predetermined amount of exposure is performed based on an exposure detection signal input to the control circuit, the drive link 106 rotates in the opposite direction (counterclockwise), and the sectors 109, 11
Close the opening 116 (T- in FIG. 13).
T, P-P2).

Even after the sectors 109 and 110 close the shutter opening 116, the drive ring 106 continues to rotate in the opposite direction, until the abutting portion 106d is connected to the bottle 107b.
By pressing 107c, the distance ring 107 is rotated once again in the same direction as the drive ring 106, thereby sending the ratchet teeth 107d of the distance ring 107 in the forward direction, or attaching the ratchet pawl 11 to the interrupted four parts 107e.
When the claw portion 113a of No. 3 reaches the next initial position where it locks, it is stopped by the gear 102, and one cycle of operation is completed (TT, P to P3 in FIG. 13).

At this time, when the claw portion 113a of the ratchet claw 113 engages with the recess 107e of the distance ring 107, the cam portion 107a of the distance ring 107 is configured so that the lens member returns to its initial position. In this embodiment, the lens operation is repeated three times in one rotation of the distance ring 107.

In this third embodiment, when the claw portion 113a of the ratchet pawl 113 comes to another initial position where it is locked in the recess 107e, the rear end 113b of the ratchet pawl 113 on the opposite side from the pawl portion 113a or the return detection switch 115 is turned off, a return signal is input to the control circuit, and the sequence cycle returns to the initial state.

In the above embodiment, each member is configured to rotate around the shank opening, but the drive ring and the distance ring may be configured as members that reciprocate linearly.

〔Effect of the invention〕

As described above, according to the present invention, fewer members are interposed in the middle than in the conventional example, so the structure can be simplified and exposure accuracy can be improved.
Since a one-way clutch unlike the conventional example is not required, the load of driving the lens can be reduced.

[Brief explanation of drawings]

1 to 8 are diagrams showing a first embodiment of the automatic focus/exposure operating device for a camera according to the present invention, FIG. 1 being a front view showing its initial state, and FIGS. 2 to 4 being Figure 5 is a sequence characteristic diagram of automatic focus/exposure operation showing the relationship between drive ring rotation amount, exposure amount, etc. and time, and Figure 6 is a sequence characteristic diagram and each detection switch. 7 is a return sequence characteristic diagram in the event of a malfunction, FIG. 8 is an enlarged side view of the pin 7a, FIG. 9 is a front view showing the second embodiment of the present invention, and FIG. 13 are diagrams showing a third embodiment of the present invention, and FIG.
Figure 0 is a front view showing the initial state, Figures 11 and 12 are front views explaining the operating states, and Figure 13 is the auto focus diagram showing the relationship between the amount of rotation of the drive ring, exposure amount, etc. and time. FIG. 3 is a sequence characteristic diagram of exposure operation. 1...Rotor shaft 2.102...Gear 4.104...Intermediate gear 4a, 104a...Large diameter tooth portion 4b, 104b. ...Small diameter tooth portion 5.105...Optical axis δ, 106...Drive ring (drive member) 6a, 1
06a ・Tooth part 6b, 6c, 106b, 106cm shaft part 6d, 1
06d... Contact part 6e... Cam part 6f... Stopper pin 7.26, 107... Distance ring (distance member)
7a, 7b, 19.25a, 25b. 107 b, 107 c-・-・-pin 7c, 2
5c, 107a...Cam parts 7d, 26d...
...Switch actuating parts 7e, 25e, 107d...
...Ratchet teeth 8.14, 18, 108...
Spring 9.10, 109, 140... Sector (blade) 9a, 10a, 109a, 110a... Operating hole 1... Return detection switch 2.16... Shaft 3.113... Ratchet pawl 3a, 113a... Claw portion 13b... Rear end portion 3b... Locking action portion 5... Pawl position detection switch 7... Locking claw 7a...Claw portion 17b...Pin portion 20.116...Shutter opening 25...Operating ring 26a...Abutting portion 26e... ...Release cam part 26f...Degree determining part 27...Eccentric pin 107e...Concave part 115...Return detection switch and above

Claims (1)

[Claims] 1. A motor controlled by a control circuit, a driving member driven by the rotation of this motor, a distance member that moves in one direction together with this driving member to drive a lens focusing mechanism, and this a ratchet pawl that locks the distance member and prevents it from moving in the other direction after a focusing operation; and a ratchet pawl that locks the distance member after the focusing operation in which the driving member drives the distance member in one direction. An automatic focus/exposure operating device for a camera, comprising: a blade opening/closing mechanism that operates to open blades based on a phase difference between the driving member and the distance member when the driving member moves in the other direction. 2. The ratchet pawl is connected to the distance member so that the drive member moves in the other direction to open the blades, moves in one direction to close the blades, and then moves in the other direction together with the distance member to return to the initial position. A locking pawl is provided to hold the ratchet pawl apart from the distance member, and the driving member releases the locking pawl from holding the ratchet pawl apart from the distance member immediately before the driving member returns to the initial position together with the distance member. 2. An automatic focus/exposure operating device for a camera according to claim 1. 3. Immediately before the drive member returns to the initial position together with the distance member, the distance member releases the locking pawl from holding the ratchet pawl apart from the distance member. Camera autofocus/exposure operating device. 4. The driving member moves in the other direction to open the blades, moves in one direction to close the blades, and then continues to move in one direction together with the distance member to stop at another initial position. The autofocus of the camera according to claim 1, wherein
Exposure actuator. 5. The automatic focus/exposure operating device for a camera according to claim 2 or 3, further comprising means for detecting whether or not the ratchet pawl is held apart from the distance member by the locking pawl. 6. The autofocus/exposure camera according to any one of claims 1 to 5, wherein the distance member is integrally provided with a pin that engages with the blade and forms the blade opening/closing mechanism. Actuation device. 7. The automatic focus/exposure operating device for a camera according to any one of claims 1 to 5, wherein the pin constituting the blade opening/closing mechanism is provided in an operating member separate from the distance member. 8. The automatic focus/exposure operating device for a camera according to claim 7, wherein the distance member and the operating member are engaged with each other via an eccentric pin. 9. Claim 9, characterized in that, of the pin constituting the blade opening/closing mechanism, a shaft portion on the distance member or actuating member side where the pin is provided and a shaft portion on the blade engagement side are eccentric to each other. Automatic focusing of the camera according to any one of 6 to 8.
Exposure actuator.