JPS5858528A - Electromagnetic release camera provided with automatic focusing adjuster - Google Patents

Abstract

PURPOSE:To inhibit the focus lock in case of the absence of a battery, by starting the focus lock by a release button. CONSTITUTION:When a release button is depressed, an AF electromagnet 8 is excited to perform of AF operation; and after detecting the focus position, an iron piece 14 fixed pivotally to an opening lever 13 is attracted again to an electromagnet 16 for release by the projecting part of a front curtain 1, and the front curtain 1 is detained by the contact between a lock pawl 9 and a front curtain lock lever 20, and the lever 13 is turned to a prescribed position, and thus, the focus lock is completed. When an object is set within the frame of the screen and the release button is depressed again, the lever 13 is turned by the power supply to the electromagnet 16, and a lock release lever 17 is turned left to disengage the lever 20 and the pawl 9 from each other, and the front curtain 1 is moved to the right, and a shutter is opened and closed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic release camera equipped with an automatic focusing device.

In conventional cameras of this type, the focus lock was performed using a button separate from the release button, so if there was no battery, only the 7-way lock was mechanically activated, but the shutter did not open or close, and as a result, the camera was unable to take a picture. There was an inconvenience in that it was later discovered that the shutter was not actually opened or closed.

In view of the above problems, the present invention provides focus locking,
The purpose of the present invention is to provide an electromagnetic, release-type camera equipped with an automatic focus adjustment device that is configured to be started with a release button so that the focus will not be locked if there is no battery. To explain this based on one embodiment, Fig. 1 shows a set state, and 1 is disposed on a shutter (not shown) so as to be slidable in the left and right direction, and an arm is attached to the lower edge of the shaft. 1a, a recess 1b, protrusions 1c and 1d, a bent part le is provided at the right end, a rack If is formed on the upper line, and a stock bottle 1g is installed near the protrusion ld. The running plate, 2, is a nonone that gives the front running plate 1 the rightward movement characteristic, and 3 is engaged with the rack 1f of the i111 member 1, and controls the rightward movement characteristic of the front running plate 1. delay device, 4
is arranged rotatably about the optical axis, and has a pin 4a implanted in its outer periphery that contacts the arm portion 1a of the front running plate 1, and is provided with a claw portion 4b and a protruding portion 4c. I
J.G., 5 has dextrorotary habit in distance ring 4? The provided spring 6 is pivotally mounted on the shutter plate, and is provided with a claw 6a that can engage with the claw 4b of the distance ring 4, and an arm 6b that slides into contact with the protrusion 1c, and the iron piece 6c is pivoted. Is the attached distance lock lever 17 dextrorotating to the distance lock lever 6?
The attached spring 8 is an AP electromagnet that is connected to an AP circuit (not shown) and attracts the iron piece 6cf of the distance lock lever 6 when energized.

9 is pivotally mounted on the protruding portion Id of the front running plate 1, and 6
Although dextrorotary behavior is imparted by
The lock pawl 1.1 is pivotally mounted on the shutter plate, and is prevented from turning right by coming into contact with g, and is provided with a bent portion 9a at one end. A pin lla that contacts the left end of a shutter set plate 23, which will be described later, is implanted at the tip end of the hold lever 13, which is pivoted coaxially with the hole lever 11, and has a bent portion 9a of the lock pawl 9 at one end. hook part 1 that engages with
3a is provided, a pin 13b is implanted, and a pin shaft 13c is installed at the other end to pivot on the iron piece 14'; 15 is between the open iron piece lever 13 and the hold lever 11; Hanging open iron piece lever 13
The spring -16 that gives right-handed rotation to the shutter is connected to the shutter control circuit described later, and when it is not energized, the iron piece 14 is completely attracted by the action of a permanent magnet, but when it is energized, a reverse magnetic field is generated and an attractive force is generated. The release electromagnet 17, which releases the iron piece 14, is pivotally mounted on the shutter plate, and is given right-handed rotation by the nozzle 18, but the right-handed rotation is prevented by the strike knob 19, and the release electromagnet 17 is pivoted on the shutter plate. Arm part 17
A lock release lever 20 is provided with a pin 17b at the other end thereof, and a lock release lever 20 is pivotally connected coaxially with the lock release lever 17, and is provided with a right-handed rotation ability by a spring 21, and has a lock release lever 20 at one end. Bending portion 20 that can suppress the bending portion 9a of the claw 9
A front running plate lock lever 122 is provided with an arm portion 20b at the middle portion thereof, and an arm portion 20C at the other end which can be restrained by the strike gun 19. During normal shooting, the front running plate lock lever 20 comes in contact with the arm 20b of the front plate lock lever 20 and rotates to the right.
The restraining focus lock bin 23 is arranged so as to be slidable in the left and right direction on the Yatsuta plate, and its left end is in contact with the bin 11alC of the hold lever 11, and its lower edge side has a protrusion 23a and a bent part. A shutter set plate 23b is provided with a rack 23c and a hook portion 23d on the upper edge side, 24 is a spring that gives the shutter set plate 23 the rightward movement habit, and 25 is a shutter. A delay device 26, which is engaged with the rack 23c of the set plate 23 and controls the rightward movement characteristic of the shutter set plate 23, is pivotally mounted on the shutter plate, and is provided with right-handed rotation by a screw 27, and has one end. A shirt release lever 29 is provided with an arm portion that can be brought into contact with the bent portion 1e of the front running plate 1, and a bent portion 26b that engages with the hook portion 23d of the shutter set plate 23 at the other end. The bent portion 23 is pivotally mounted on the protruding portion 23a of the shutter set plate 23 and is given right-handed rotation by a spring 30.
The opening control lever 30 is arranged to be rotatable about the optical axis, and has an end face 29a formed at one end and an arm 29b provided at the other end. A half-moon bottle 30a that opens on its outer periphery and can be brought into contact with the end surface 29a of the control lever 29, and a pin that activates the trigger switch S3 of the shutter control circuit, which will be described later.
30b and another pin 30c are installed in the sector ring; 31 is a spring that gives the sector ring 30 a left-handed rotation; 32 is a slot whose one end is pivoted on the shutter plate and which is provided in the middle; ) 32a is sector” nong 3
an exposure blade 33 which is slidably fitted to the bin 3rOc of o and opens and closes the exposure opening as the sector ring 30 rotates;
is pivotally connected to the shirt release, and has a spring 34 which is given a right-handed rotation ability, and has a pin 33a implanted at one end that contacts the arm 29b of the opening control lever 29, and an iron piece 33b at the other end. A closing lever 35 is pivotally mounted and is provided with a bent portion 3.3c that can be pushed by the left end of the set plate 23 during setting, and the closing lever 35 is connected to a shutter control circuit to be described later, and is permanently closed when not energized. Iron piece 3. j
bTh adsorbed but energized 2 Figure shows the shutter control circuit of the above embodiment, where E is the power supply, Sl is the power switch, CI 102 pC5 is the capacitor, R2 is the resistor, and R
1 is a resistor with a small value to form an extremely short delay time for normal photography. Trigger switch released, CM,
;CM.

is the connomitor circuit, Q is the transistor, T, 1 is the coil of the release magnet 16, R2 is the closing electromagnet 3
5 coils.

The electromagnetic release camera according to the present invention has a structure as described above.
Therefore, when not using focus lock, that is, normal shooting and cell timer shooting, when the camera release button (not shown) is pressed down, the power switch S1 is turned on, and photometry such as brightness and brightness is adjusted. It will be done. Further, since a power supply is also connected to the AF circuit (not shown), the AM electromagnet 8 is excited, and the iron piece 6C of the distance lock lens 6 is attracted to the AM electromagnet 8. The claw 6a is rotated to the left against the force, and the claw 6a is removed from the claw portion 4c of the distance ring 4. And in this state, AP
The circuit remains ready. Also, capacitor C7 is also a resistor ■,
It is fully charged throughout. When the release button is subsequently pressed down, the capacitor C1 is charged through the resistor R1'i, and the transistor Q (connected to the output terminal of the connominator CM1) is turned on, so the charge stored in the capacitor C2 is used for the release. Coil L of electromagnet 16
1 as an excitation current. Therefore.

Since the attractive force of the release electromagnet 16 disappears, the iron piece 14
is released, the opening lever 13 is turned to the right by the charged nose 15, and its hook portion 13a is disengaged from the bent portion 9a of the lock pawl 9, and as a result, the front running plate 1 is delayed □
Unaffected by the device, Nonone 2 begins to move to the right. The rotation range of the opening iron piece lever 13 is a range in which the pin shaft 13c contacts the end surface 1h of the front running plate 1 and the pin 13'b does not contact the arm portion 17a of the lock release lever 17. Until now. When the front running plate 1 moves to the right, the locking of the bin 4a by the arm 1a is released, and the distance ring 4 is rotated to the right by the nose ring 5, and the distance ring 4 is driven by a lens (not shown). The in-focus position is detected by rotating the system and moving the movable mirror from a short distance to infinity or from infinity to a short distance. Next, when the in-focus position is detected, the signal from the optical intermittent comparison detection circuit
Since the power supply to the P electromagnet 8 is cut off and the attractive force of the AF electromagnet 8 disappears, the distance lock lens 6 is rotated to the right by the nose 7, and as a result, the claw 6a moves to the claw portion 4b of the distance ring 4.
to lock the distance ring 4. When the front running plate 1 further moves to the right, its protruding portion 1c opens and pushes down the pin shaft 13c'li of the iron piece lenome 13, causing the open iron 6 piece lenome 13 to rotate counterclockwise against the nose 15. Therefore, the iron piece 14 is again attracted to the release electromagnet 16, but there is no other effect. Furthermore.

When the front running plate 1 moves to the right, its bent portion 1e pushes against the arm portion 2 of the shirt taller release lever 26 and resists the shirt release lever 26'f: the shoulder strap 27. As a result, the bent portion 26b of the shirt release lever 26 comes off the hook portion 23d of the shutter set plate 23. Therefore, the shutter set plate 23 is a delay device,
25, it begins to move to the right due to Nonone 2 and 4. Then, the end face of the opening control lever 29 pushes the half-moon pin 30a'e of the sector ring 3° and turns the sector and ring 30 to the right against the angle 31, so the trigger switch S is turned OFF. As the temperature increases, the exposure blade 32 gradually opens the exposure opening. After that, when the charge of the capacitor C8 charged through the light receiving element Rx reaches a value corresponding to the appropriate light amount value, an output is output from the connominator OM2 and is supplied to the coil L2 of the closing electromagnet 35.
It is supplied to the coil L2 of the closing electromagnet 35, and the attractive force of the closing electromagnet 35 disappears, so that the iron piece 33b is released. Therefore, the closing lever 33 is rotated to the right by the nose 34, and the arm 29a' of the control lever 29 is opened by the pin 33a.
e to rotate the opening control ring 29 to the left against the ring 30, so that the end face 29a is aligned with the sector ring 30.
As a result, the sector ring 3
0 is rapidly rotated to the left by the charged spring 31, so that the exposure vane 32 quickly closes the exposure opening. This completes one exposure.

□Next, to explain the case of using the focus lock, when the focus lock member (not shown) on the camera side is activated in the set state shown in FIG. 1, the focus lock bin 22 moves to the right as shown in FIG. Move, so the front running board lock Leno:! ″-20 is the arm ゛20
c rotates to the right until it is restrained by the stony pin 19, and the bent portion 20a of the front running plate lock lever 20 locks the front running plate 1.
comes within the operating range of Therefore, the front running plate 1 is in a state where it can be stopped immediately before it comes into contact with the arm part 2 fia of the shirt release lever 26. After that, press the release button in the same way as above to turn on the power switch SI.
Then, brightness detection, warning and power check operations are performed, and the AM electromagnet 8 is excited to perform AP operation in the same manner as above. At this time, the right rotation of the opening iron piece lever 13 is inhibited by the pin shaft 13c coming into contact with the end surface 1h of the front running plate 1, so the hook portion 13ai is simply removed from the bent portion 9a of the lock pawl 9, and the lock is locked. It is easy to press the arm part 1.7at of the release reno-17. When the detection of the focal point position is completed by the AF operation, the protrusion 1c of the front running plate 1 opens the iron plate 1.
The iron piece 14 pivotally attached to 3 is again attracted to the release electromagnet 16. Further, the front running plate 1 is locked when the bent portion 9a of the lock pawl 9 comes into contact with the bent portion 20a of the front running plate locking plate 20, and at this time, the opening iron piece lever 13 is locked when the pin shaft 13c is moved forward. It becomes possible to rotate until it comes into contact with the recess 1b of the plate 1. Focus lock ends here. Next, when the subject is placed within the screen frame and the release button is pressed down again, the power switch S is turned on and the release electromagnet 16 is energized again.

Then, this time, the open iron piece 13 is attached to the pin shaft 13.
c rotates until it falls into the four parts 1b of the front running plate 1, so that the pin 13b of the open iron piece 13 fully pushes the arm 17a of the lock release lever 17 and releases the lock release lever 1.
7 against Nonone 18 and rotated to the left. Therefore, the bin 17b of the lock release lever 17 is the front running plate lock lever.
20 arm 20b' to lock the front running plate lock lever 2.
0 to the left against the spring 21, the bent portion 2
0a comes off from the bent portion 9a of the lock claw 9. Therefore, the front running plate 1 can now move to the right, and the shutter can be opened and closed in the same manner as described above.

Furthermore, when the shutter set plate 23 moves to the right, and the shutter 11 rotates to the right, the iron piece 14, which is pivoted to the opening iron piece lever 13, is again attracted to the release electromagnet 16. The protrusion IC of the front running plate l and the pin shaft 13c of the opening iron lever 13 do not interfere with each other. Further, since the lock claw 9 is provided on the front shutter plate i, the shutter can be set smoothly.

As mentioned above, the electromagnetic release camera according to the present invention...
Focus locking is started with the release button, so focus locking will never occur if there are no batteries. Therefore, only the focus lock is performed mechanically, and the shutter is often opened and closed, so there is no inconvenience such as when you think you have taken a picture but later find out that the shutter has not actually opened or closed. Does not occur.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a set state of an embodiment of an electromagnetic release camera equipped with an automatic focus adjustment device according to the present invention;
Figure 2 is a diagram showing the shutter control circuit of the above embodiment, and Figure 3 is a diagram showing the shutter control circuit of the above embodiment.
The figure is a diagram showing the focus lock state of the above embodiment. ■...Front running plate, 3...Delay device, 4...Distance ring, 6...Distance lock rail, 8...AP city magnet, 9...Lock claw, ll... Hold lever, 13
... Open iron piece lever, 14... Iron piece, 16... Electromagnet for release, 17... Lock release lever, 19.
...Stotsunokuhin, at, 26...Shirt release lever, 29...Opening control lever, 30...
・Sector ring, 32...-h wing, 33...
Closed-135...1b magnet for orchid.

Claims (1)

[Claims] a front-running member; an iron piece member that is engaged with the front-running member; and an electromagnetic device that operates in conjunction with depression of a release button to release the locking of the front-running member by the iron piece member. , a focusing mechanism that operates in conjunction with the front running member being released from the lock and starting to run; a shutter set plate that controls the operation of the shutter blade; and a shutter set plate that is locked at the set position of the shutter plate. When the shirt release member is pressed and released from its lock at the final stage of the front running member, and when operated in preparation for focus lock photography, it enters the travel trajectory of the front running member and and a front-running member locking member that locks the front-running member immediately before pressing the shirt release member, and when the shutter release button is pressed down a second time to activate the electromagnetic device again, the electromagnetic device is activated again. An electromagnetic release camera equipped with an automatic focus adjustment device configured such that an iron piece member pushes the front running member locking member to release the locking of the front running member.