JPH0157772B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shutter setting device for an electric shutter.

Conventional electric shutters have a structure in which the film winding motor is prohibited from operating while the shutter button is pressed, and the film winding and shutter setting are not performed, and the motor drive switch is closed during the return stroke of the shutter button. As the shutter button was getting older, preparations for the next shot could not be made unless the shutter button was released, and the number of switches linked to the shutter button increased, resulting in a large release stroke, which resulted in a disadvantage of lacking in quick-shooting performance.

In view of the above-mentioned problems, the present invention has been developed so that the motor drive switch is turned on in the final operating range of the set plate, which is the stage where the opening/closing operation of the shutter has already been completed, even when the shutter button is held down. The purpose is to provide a shutter setting device that is capable of winding a film and setting a shutter.This will be explained below based on an embodiment shown in the drawings. The figure shows a front view and the arrangement of components on the back side in a set state with an electric shutter including an exposed opening 1a, two slots 1b and 1c, and a bent part 1d.
A shutter plate 2, 2 is a pair of exposed blades pivotally mounted on the rear surface of the shutter plate 1 at substantially symmetrical positions and provided with slots 2a, 2a, respectively; 3 is a pair of exposed blades on the shutter plate 1; The slots 1b, 1 are pivotally connected and implanted at both ends thereof.
The pin 3c at one end is connected to the exposed blades 2, 2 through pins 3a, 3b passing through the pin 3c, respectively.
4 is an opening/closing lever 3 which is planted with a protrusion 3d and a bent part 3e at the other end.
A spring 5 is hung between the pin 3c of the shutter plate 1 and a bent portion 6a of the set plate 6, which will be described later, and acts as an opening force source and a closing force source for the opening/closing lever 3.
The pin 5a, which is composed of a sector gear pivotally mounted above and another gear, and which is implanted in the sector gear, is in contact with the protrusion 3d of the opening/closing lever 3, thereby controlling the clockwise rotation characteristic of the opening/closing lever 3, that is, the exposed blade 2, 2 is a delay device for controlling the opening start-up characteristic; 5' is a spring that imparts right-handed rotation behavior to the sector gear of the delay device 5; 6 is a spring disposed on the shutter plate 1 so as to be slidable in the left-right direction; A shutter set plate 7 is pivotally mounted on the set plate 6, and is provided with a bent portion 6a at one end and a hook portion 6b and a bent portion 6d extending to the back side of the plate 1 at the other end. A concave portion 7a that engages with the bent portion 3e of the opening/closing lever 3 is provided at one end, and an arm portion 7b is provided at the other end.
8 is the drive lever 7 provided with the respective drive levers.
A spring 9, which is hung between the shutter plate 1 and the set plate 6 and which gives the drive lever 7 right-turning ability, is pivotally mounted on the shutter plate 1 and has an arm portion 9a at one end. A pin 9b that contacts the arm portion 7b of the drive lever 7 is implanted at the other end, and an iron piece 9c
10 is a spring that is hung between the iron lever 9 and the shutter plate 1 and gives the iron lever 9 a right-handed turning ability; 11 is arranged on the shutter plate 1; A closing control electromagnet 12 is pivotally mounted on the shutter plate 1 and has a hook portion 12a and a cam surface 12b at one end.
A hold lever 13 is pivotally mounted on the shutter plate 1 coaxially with the hold lever 12 and has an arm 12c at the other end that abuts the arm 9a of the iron piece lever 9. A bent portion 13 that comes into contact with the cam surface 12c of the lever 12
14 is a hold lever 1;
2 and the charge spring locking lever 13, and provides the hold lever 12 with right-handed rotation behavior and the charge spring locking lever 13 with left-handed rotation behavior; 15a is a hold locking lever with a slot 15b in the middle, and 16 is pivotally attached to the back surface of the shutter plate 1 and has a slot 15b at one end. A start release lever 1 is provided with a pin 16a that slides into a slot 15b of a hold locking lever 15, an arm portion 16b at the other end, and a bent portion 16c and an arm portion 16d at the midway projecting end.
6' is a spring that gives the start release lever 16 a left-rotating behavior; 17 is pivotally mounted on the shutter plate 1, and has a hook portion 6 of the set plate 6 at one end;
A release lever 18 is provided with a bent portion 17a that engages with the release lever 17b and a bent portion 17b extending toward the back side of the plate 1 at the other end. This is the spring that gives the release lever its left-handed rotation.

FIG. 2 shows a plan view in the set state, and reference numeral 19 is pivotally mounted on the bent portion 1d of the plate 1, and has an arm portion 19a at one end that can be engaged with the bent portion 16b of the start release lever 16. an intermediate lever provided with a fork portion 19b at the other end;
20 is a spring that is hung between the intermediate lever 19 and the bent portion 1d and gives the intermediate lever 19 a right-handed turning behavior; 21 is pivotally attached to the lower surface of the bent portion 1d and is bent at one end; portions 21a and 21b are provided, and a bent portion 21c is provided at the other end, and a fork portion 19b of the intermediate lever 19 is provided at the protruding end of the intermediate portion.
22 is an iron piece fixed to the bent part 21a of the start iron lever 21, and 23 has one end hooked to the pin 21b of the start iron lever 21 and the other end. Hook portion 13b of charge spring locking lever 13
A charge spring 24 is fixed to the start iron lever 21 and gives left-handed rotation behavior to the start iron lever 21. The charge spring 24 is disposed on the lower surface of the bent portion 1d and has a built-in permanent magnet around which a coil is wound. This is a starting electromagnet that attracts the iron piece 22, but releases the iron piece 22 when a demagnetizing field is applied by energization such as a pulse.

In FIG. 3, reference numeral 25 is pivotally attached to the back surface of the shutter plate 1, and has an arm portion 25a at one end that contacts the bent portion 16c of the start release lever 16, and a bent portion 25b at the other end. Ta
AF plate lock lever, 26 is AF plate lock lever 2
a spring that is hung between the AF plate lock lever 25 and the plate 1 and gives the AF plate lock lever 25 a right-handed rotational behavior;
27 is attached to the back surface of the plate 1 so that it can be slid up and down and rotated by pin-slot connection, and has a cam surface 27a at the tip and an AF in the middle.
a focus lever provided with an edge portion 27b that can engage with the bent portion 25b of the plate lock lever 25;
28 is a spring that is hung between the focus lever 27 and the plate 1 and gives the focus lever 27 a right-handed rotation behavior; 29 is a cam that is installed on the back side of the plate 1 and that is attached to the focus lever 27; A pin 30 in sliding contact with the surface 27a is disposed on the back surface of the plate 1 so as to be slidable in the left and right direction.
The hook portion 30a that engages with the bent portion 25b of the AF plate lock lever 25 and the start release lever 16
A bent part 30b that can come into contact with the arm part 16d of the hold lever 12 is provided, and a pin 30c is implanted therein, and a pin 30d that can come into contact with the cam surface 12b of the hold lever 12 is implanted in the middle part, and is engaged with the charge spring 23. Hook portion 30e and release lever 17 that can be combined
AF set plate 31, which is provided with an end surface 30f that can come into contact with the bent part 17b of the shutter set plate 6, and another protruding part 30g, and further has a protruded part 30h that can come into contact with the bent part 6d of the shutter set plate 6 at the other end. is stretched between the lever AF set plate 30 and plate 1.
The AF set plate 30 is given a rightward movement habit.
The AF set plate spring 32 is composed of a sector gear and other gears pivotally mounted on the shutter plate 1, and a fork portion 32a provided on the sector gear is
It is slidingly fitted with the pin 30c of the AF set plate 30 and the AF
A delay governor 33 that controls the rightward movement characteristics of the set plate 30, that is, the delay time for distance selection, is rotatably arranged around the optical axis, and a pin 33a that comes into contact with the protrusion 30g of the AF set plate 30 is arranged so as to be rotatable about the optical axis. A focus ring is implanted and has a rack 33b on its outer periphery; 34 is a spring that imparts right-handed rotation to the focus ring 33; 35 is a ratchet gear disposed on the back surface of the plate 1;
It consists of an AF electromagnet and the ratchet gear meshes with the rack 33b of the focus ring 33.
A latch mechanism 36 that latches the focus ring 33 when the distance is selected by the AF signal can rotate in conjunction with the automatic film winding mechanism and engages with the protrusion 30h of the AF set plate 30 at a 180° symmetrical position on the surface. A pair of pins 36a, 36a that can be matched
This is a disc with a implanted surface.

sw ₁ is a trigger switch operated by pin 3c of opening/closing lever 3, sw ₂ is iron piece lever 9
The flash switch sw ₃ is actuated by a member (not shown), and is a film winding changeover switch actuated by the bent portion 6c of the shutter set plate 6.

FIG. 4 shows an electric circuit for winding the film and setting the shutter. M is the motor for winding the film, SW ₄ is a changeover switch that is switched every 1/2 rotation of the disc, and E is a power source.

Since the electric shutter including the shutter setting device according to the present invention is constructed as described above, to describe normal shooting, when the shutter button is pressed, the first switch (not shown) is turned on, a warning display and battery detection are performed, and the first switch is turned on. If the power supply E is equal to or higher than the specified voltage in the state of one stroke, preparations for proceeding to the next state are completed. Next, when the second stroke (not shown) is entered and the second switch is turned ON, the power source E is latched by the power transistor, and at the same time, the starting electromagnet 24 is pulsed by the dividing period constituted by the CR oscillation circuit. A certain amount of time (sufficient time for the coil of the starting electromagnet 24 to rise) is given. This pulse signal causes a demagnetizing field to be applied to the starting electromagnet 24, and this magnetic flux causes the starting electromagnet 24 to lose its attractive force, so that the starting iron piece lever 21, which had been attracted until then, is moved by the charge spring 23 as shown in FIG. The patient is rapidly rotated to the left. Then, intermediate lever 1
9 rotates to the right against the spring 20 and strikes the arm 16b of the start release lever 16 with its arm 19a, causing the start release lever 16 to rotate to the right in FIG. 3 against the spring 16'. The bent portion 16c of the start release lever 16 pushes the arm portion 25a of the AF plate lock lever 25 to rotate the AF plate lock lever 25 to the left against the spring 26.
Then, the bent part 25b of the AF plate lock lever 25
Since the hook portion 30a of the AF set plate 30 is released, the AF set plate 30 is moved to the right by the spring 31 while receiving the action of the delay cover 32. At this time, start release lever 16
The hold locking lever 15 is rotated counterclockwise in FIG.
The hold lever 12 tries to turn to the right by the spring 14, but since the iron piece 9c of the iron piece lever 9 for closing control is attracted and held by the electromagnet 11 for closing control, the arm part 12c of the hold lever 12 is rotated by the arm of the iron piece lever 9. It remains in contact with the section and its rotation is prevented. Therefore, a force is acting on the iron piece lever 9 that tends to separate it from the electromagnet 11. Furthermore, since the hold lever 12 is prevented from turning clockwise, the charge spring locking lever 13 also does not turn clockwise.
The charge spring 23, once released by the rightward movement of the AF set plate 30, is immediately locked by the hook portion 13b of the locking lever 13, and its spring force is not lost. Next, the AF setting plate 30 further moves to the right, and the focus ring 33 rotates accordingly to select a distance from near to ∞ or from ∞ to near.
Thereafter, the end surface 30f of the AF set plate 30 pushes the bent portion 17b of the release lever 17 (FIG. 3) and rotates the release lever 17 to the right against the spring 18, so that the bent portion 17a The set plate 6 is removed from the hook portion 6b, and the set plate 6 begins to move rightward by the spring 4. When the set plate 6 starts to move rightward, the recess 7a of the drive lever 7 pushes the bent part 3e of the opening/closing lever 3, so that the opening/closing lever 3 rotates to the right under the action of the delay device 5. The exposure blades 2, 2 begin to gradually open the exposure opening 1a. On the other hand, as the opening/closing lever 3 is rotated to the right, the pin 3c is separated from the trigger switch SW ₁ , so the trigger switch SW ₁ is turned OFF, and a light power source suitable for the subject light starts charging the time-limiting capacitor through the light receiving element. After proper exposure commensurate with the brightness of the subject, the closing control electromagnet 1
Since the current to the electromagnet 11 is cut off, the electromagnet 11 loses its attractive force and releases the closing control iron lever 9c. Therefore, the closing control iron piece lever 9 is rotated to the left against the spring 10 by the spring force source of the hold lever 12, that is, the spring 14. At this time, the charge spring locking lever 13 also rotates to the right and its hook portion 13b disengages from the charge spring 23, and the unlocked charge spring 23 returns to the right direction in FIG. It is locked. On the other hand, as the closing control iron lever 9 rotates to the left, its pin 9b pushes the arm 7b of the drive lever 7, so the drive lever 7 rotates to the left against the spring 8, and the recess 7a bends the opening/closing lever 3. It comes off from section 3e. Therefore,
Since the opening/closing lever 3 is rotated to the left by the spring 4, the exposure blades 2, 2 close the exposure opening 1a, thereby completing the exposure. In addition, during long-term exposure, the opening/closing lever 3 operates the full stroke to maintain the fully open state (temporarily stopped and held), and when the closing control electromagnet 11 operates, the concave portion 7a of the drive lever 7 moves to the bent portion 3e.
When the opening/closing lever 3 is separated from the set plate 6 and rotates to the left, the set plate 6 further moves to the right by the remaining stroke, returns to its home position, and stops. This is a very effective method since it does not affect the exposure when taking the exposure end signal (motor winding signal, etc.) from the set plate 6.

Next, to explain the film winding operation and the shutter setting operation, first, before the setting operation, the start iron lever 21 is moved by the charge spring 2.
When one end of 3 is released from the hook portion 13b of the charge spring locking lever 13, it moves to the bent portion 21c of the iron piece lever 21 and has almost lost its charging force. The iron piece 22 is rotated to the right and returned to the set position, and the iron piece 22 is attracted to the starting electromagnet 24 which is in a non-energized state. Now, as described above, when the set plate 6 moves to the right end in FIG. 1, its bent portion 6c switches the film winding switch _SW3 from terminal A to terminal B in FIG. 4. Then, the film winding motor M rotates to wind the film, and the disc 3
6 rotates to the right in Fig. 3, and its pin 36a
Push the protrusion 30h of the AF set plate 30. Therefore, the AF set plate 30 is moved to the left in FIG. 3 while charging the AF set plate spring 31, and during this certain stroke, the protrusion 30h
pushes the bent portion 6d of the shutter set plate 6, so that the shutter set plate 6 is also moved to the left in FIG. 1 while charging the spring 4. Furthermore, by moving the shutter set plate 6 to the left, the changeover switch SW ₃ is switched from terminal B to terminal A.
By rotating switch 6, changeover switch sw ₄ is activated in Fig. 4.
is switched from terminal D to terminal C, the rotation of motor M is continued, and therefore the leftward movement of AF setting plate 30 and shutter setting plate 6 is maintained. or,
At this time, the pin 30d of the AF set plate 30 pushes the cam surface 12b of the hold lever 12 to rotate the hold lever 12 to the left, so that its force source, that is, the spring 14, is charged. Meanwhile, the iron piece lever 9 is rotated to the right by the spring 10, and the iron piece 9c contacts the closing control electromagnet 11 to maintain a close contact state. At the same time, the hook portion 12a of the hold lever 12 immediately engages with the hook portion 15a of the hold locking lever 15, which has been restored. Further, the shutter set plate 6 also has its hook portion 6b.
is locked to the bent portion 17a of the shutter release lever 17. Also, the hook portion 30a of the AF set plate 30 is connected to the bent portion 25 of the AF plate lock lever 25.
It is locked at b. On the other hand, when the AF set plate 30 moves to the left, the charge spring 23 is pushed by the hook portion 30e at one end and moves to the left, pushing the slope of the charge spring locking lever 13 to rotate it to the right, and the hook 30e moves to the left. It becomes depressed in the portion 13b and enters a charge state. At this time, the charge spring 23 is still attached to the hook part 0 of the AF set plate 30.
It is engaged with e. Therefore, a left turning force is applied to the start iron lever 21 in FIG. Thus, the shutter setting is completed, but at this time the disc 36 has rotated by 1/2, and at this point the changeover switch _SW4 is switched from the terminal C to the terminal D in FIG. 4, so that the motor M is stopped. In the above operation, since the motor M is switched on in the final operating range of the set plate 6 (the opening/closing operation of the shutter has already been completed), no malfunction occurs. Furthermore, even if the shutter button is held down, it is possible to wind the film and set the shutter once the shutter opening/closing operation is completed, so there are fewer interlocking switches compared to conventional cameras that change the switch when the shutter button returns. In addition, the release stroke is also small, and the quick shooting performance is also excellent.

Incidentally, instead of the changeover switch SW ₄ , a changeover switch consisting of a slider S and a conductor pattern P which are linked to a motor M as shown in FIG.
sw ₄ ′ may also be used.

Next, to explain about self-timer photography, when the self-timer switch is turned on, the first and second switches are turned on at the same time, the timer works for 10 seconds, the power latch circuit is activated, and the timer is turned on. After the operation is completed, a pulse is applied to the start electromagnet 24, and thereafter the same operation as the above-mentioned normal photographing is performed.

Next, to explain focus lock photography, when the focus lever 27 is pushed down in FIG.
The AF plate lock lever 25 rotates to the left and its bent portion 2
5b comes off from the hook portion 30a of the AF set plate 30, and as a result, the AF set plate 30 is removed from the delay governor 3.
2, the AF set plate spring 31 moves the AF set plate spring 31 to the right. Therefore, although one end of the charge spring 23 is once unlocked, it is immediately locked by the hook portion 13b of the charge spring locking lever 13, so that the charging force of the charge spring 23 is not lost. Further, the focus ring 33 rotates to follow the rightward movement of the AF set plate 30 to select a distance from near to ∞ or from ∞ to near. After this
The bent portion 30b of the AF set plate 30 is locked to the arm portion 16d of the start release lever 16, and the rightward movement of the AF set plate 30 is stopped just before its end surface 30f comes into contact with the bent portion 17b of the release lever 17. It will be done. Thus, when the focus lever 27 is pressed down, only distance selection is performed and the condition is the same as the first stroke of the shutter button. Use of the focus lock ends in this state, move the camera so that the focused subject is at the desired position, press the shutter button, and then take the same shooting as above depending on whether you are using normal shooting or self-timer shooting. An action is taken.

As mentioned above, in the shutter setting device according to the present invention, the switch for driving the motor is turned on in the final operating range of the setting plate, which is the stage where the opening and closing operations of the shutter have already been completed, so that the shutter button can be pressed and held. It is possible to wind the film and set the shutter even in the above state, and since the number of switches linked to the shutter button is reduced, the release stroke is shortened, and as a result, an electric shutter with excellent quick shooting performance can be constructed. Also, for the same reason, exposure will not be adversely affected. In addition, during long exposure, the setting plate is designed to stop for a moment when it is fully open, so the motor drive switch will not operate until the closing signal is given and the setting plate operates again and reaches the final operating range. There is no risk of malfunction occurring.

[Brief explanation of drawings]

FIG. 1 is a front view showing an electric shutter including an embodiment of the shutter setting device according to the present invention in a set state, FIG. 2 is a plan view of the electric shutter, and FIG.
4 is a diagram showing the arrangement of components on the back side of the electric shutter, FIG. 4 is an electric circuit diagram for winding the film and setting the shutter of the electric shutter, and FIG. 5 is a diagram showing another example of the electric circuit. DESCRIPTION OF SYMBOLS 1... Shutter plate, 2... Exposed blade, 3... Open/close lever, 5... Delay device, 6... Shutter set plate, 7... Drive lever, 9... Iron piece lever, 11... Close control electromagnet, 12... Hold lever, 13...
Charge spring locking lever, 15... Hold locking lever, 16... Start release lever, 17... Release lever, 19... Intermediate lever, 21... Start iron piece lever, 22... Iron piece, 23... Charge spring, 24... Start electromagnet, 25... AF plate lock lever, 27... Focus lever, 29... Pin, 30... AF set plate, 32... Delay governor,
33... Focus ring, 35... Latch mechanism, 3
6... Disc, sw ₁ ... trigger switch, sw ₂ ... switch for flashing, sw ₃ ... changeover switch for film winding, sw ₄ ... changeover switch, M... motor for film winding.

Claims (1)

[Claims] 1. A setting plate that can reciprocate between a set position and a non-setting position and can be stopped in the set position, and a drive lever that is pivotally mounted on the setting plate and can operate integrally with the setting plate. , an opening/closing lever that can open and close the exposed blade by reciprocating, and a closing electromagnetic device that controls the drive lever, and the shutter release releases the restraint and moves the setting plate from the set position. When the forward movement is started, the drive lever engages with the opening/closing lever, so that the opening/closing lever moves forward to open the exposed blade, and after the proper exposure time has elapsed, the electromagnetic device is activated to engage the drive lever and the opening/closing lever. In the electric shutter, when the engagement with the opening/closing lever is released, the opening/closing lever moves back and closes the exposed blade, and then the setting plate reaches the non-setting position. A shutter setting device comprising: a switch that can be closed under the control of the setting plate; and a motor that is operated when the switch is closed to return the setting plate to the setting position.