JPS5849922A - Camera with electronic shutter - Google Patents

Abstract

PURPOSE:To prevent the waste of a battery, by switching the exposure to a mechanical constant exposure without connecting the battery to an electronic shutter and connecting the battery only to a flash device when the flash device is used. CONSTITUTION:In case of flash exposure, a changeover switch 22 is connected to the side of a contact (b), and an electronic switching circuit E is made unoperated, and a flash device is made operated. When a release member 11 is depressed, a switch 19 is closed to charge a main capacitor C1 of the flash device. Since an iron core 15 is not excited by the switch 22, an interlocking lever 13 is turned clockwise through a spring 17, and a movable iron core 14 is moved upward through a fork member 13c. When the release member 11 is depressed furthermore, a detaining pawl 9 is turned clockwise by a pin 11e to disengage a standing and bending part 9b and a projection 5e from each other. A driving member runs to the right, and a cam face 7b of a driving lever 7 turns a switching lever 3 clockwise while carrying a standing and bending part 3b of the switching lever 3, and a sector 2 is opened to determine the exposure. Thus, the waste of a battery Q is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera with an electronic shutter used with a flash device.

Most modern cameras use electrically controlled electronic shutters, which automatically control the appropriate exposure depending on the brightness of the subject, and also have a built-in flash device in case the brightness is insufficient. It is now possible to take pictures using a flash device.

However, in this type of camera, the electronic shutter and the flash device are controlled by the same battery, which consumes a lot of battery power.The flash device in particular consumes a lot of battery power, and the electronic shutter can no longer operate properly. Battery voltage drops.

In view of the above, the present invention aims to provide constant mechanical exposure without connecting batteries to the electronic shutter when using a flash device, and to prevent battery consumption by connecting batteries only to the flash and light device. It is something to do.

According to the present invention, a camera that controls a flash device and an electronic shutter using a single battery includes a mode switching device that switches between automatic exposure operation using natural light and flash exposure operation, and a mode switching device that switches the electronic shutter to mechanical constant exposure operation. a switching means;
and a flash device that operates in synchronization with the electronic shutter, and by switching the mode switching device from an automatic exposure operation using natural light to a flash exposure operation, the electronic shutter is operated with a constant mechanical exposure, and the flash device operates in synchronization with the electronic shutter. This is to carry out the shooting.

An embodiment of the present invention is shown below. Figure 0 shows the charging state of the shutter, 1 is the shutter board,
1a shows an aperture for photographing.

2 is the sector for cleaning the aperture blades, and only one of the two blades is shown. Reference numeral 3 denotes a sector opening/closing lever, which rotates around the shaft 3a on the shutter board, and connects the vertical portion 36 and the sector 2.
A 5g bottle is playing in the groove.

and a protrusion 3d, and is given levorotation by a spring 4 to keep the sector 2 in a closed state.

Reference numeral 5 denotes a driving member, which has long grooves 5@, 5b and is guided by pins 5e, 5d planted on the shutter substrate 1.
A biasing force is applied to the right by a spring 6. Further, the driving member 5 is formed with protrusions 5m, 5(,
Bin 59.5h.

5j is planted. Furthermore, a rack 5f is formed on the drive member 5 and meshes with the governor device 16. Reference numeral 7 denotes a drive lever, which rotates around an axis 7α on the drive member 5, has cam surfaces 7b, 7a and a slope 7d, is given dextrorotation by a spring 8, and rotates around an axis 7α on the drive member 5. 5f. Reference numeral 9 denotes a locking claw that rotates around the shaft 9a on the shutter base plate 1, and has a vertical portion 96 and an arm portion 9o that locks the protrusion 5- of the drive member 5.
, and is given levorotation by a spring 10. 11
is a release member having long grooves 11α and 11b, guided by a bottle 11ag11d planted on the shutter substrate 1, and stopped at the raised position by a spring 12. Furthermore, bottles 11g and 11/ are implanted in the release member 11. 13 is an interlocking lever, which is connected to the shaft 1 on the shutter board 1.
3α as the center of rotation, the release member 11 and the spring 17
136 and 7 oak portions 131 . connected by and in contact with the pin 11 / of the release member 11 . has. 1
Reference numeral 4 denotes a movable iron piece of an electromagnetic device, which has long grooves 14α and 14b and is guided by pins 14e and 14d planted on the shutter board 1.
A bottle 14-, which is used for free play, is installed in the bottle 6. Further, the movable iron piece 14 is formed with a cam surface 14/ for regulating the projection 3d of the sector opening/closing lever 3, a projection 14f facing the cam surface 7c of the drive lever 7, and a suction surface 14h. Reference numeral 15 is an iron core of an electromagnetic device fixed to the shutter substrate 1. 18 is a coil of an electromagnetic device.

19 indicates a power switch, 20 indicates an activation switch of the electronic switching circuit X, said switch 19.20
Since the circuit including the above is widely known, it will not be described in detail.

Moreover, the iron piece lever claw 21 is the shaft 211! A locking step 2 is rotatably supported by the shutter base plate 1 and given dextrorotation by a spring 21&, and locks the curved portion of the movable iron piece 14.
1c, and a protrusion 21d that engages with the protrusion 51 of the drive member 5.
and a spring 21- that engages with the bottle 5j. The spring 211 is stronger than the spring 216, but only when it engages with the pin 5j, the iron piece lever pawl 21 is rotated to the left around the axis 21α against the spring 216, and the locking step 21c is moved around the curved part of the movable iron piece. Displace it to the working area.

The battery Q is connected to the selector switch 2 via the power switch 19.
When 2 is connected to a, it is supplied to the switching circuit E, and when it is connected to b, it is supplied to the flash device r.

The flash device 1 includes a booster circuit A, a main capacitor C1, a flash discharge tube X, a trigger circuit B, a synchro switch 23.
It consists of a light emission stop circuit including a commutating capacitor 't I resistor R9 and a light receiving element S.

The synchro switch 23 is closed when the movable iron piece 14 finishes operating, and starts the F rigger circuit B.

Next, the method of operation will be explained, starting from the case of automatic exposure operation using natural light.

When the release member 11 is pushed down from the state shown in the figure, the power switch 19 is closed by the initial operation of the release member 11, the fill 18 is energized, and the iron core 15 attracts the movable iron piece 14. At this time, since the bottle 11/ of the release member 11 is lowered, the bottle 111 of the release member 11 is attached to the arm portion 9 of the locking claw 9.
c is pressed to rotate the locking pawl 9 to the right, the standing portion 9b of the locking pawl 9 releases the locking of the protrusion 5# of the drive member 5, and the drive member 5 starts moving rightward. At this time, the drive member 5 is driven slowly by the governor device 16, and the pin 5k of the drive member 5 opens the switch 20, activating the electronic switching circuit. In connection with this operation, the cam surface 7h of the drive lever 7 on the drive member 5
b is pressed, the sector opening/closing lever 3 begins to rotate to the right against the spring 4, and the sector 2 is opened. When the switching circuit is reversed in relation to the object brightness information, the current to the coil 18 is cut off, and the iron core 15 is demagnetized, the tension force of the spring 17 is transmitted to the movable iron piece 14 via the interlocking lever 13. The raised protrusion 14f contacts the cam surface 76 of the drive lever 7, and the drive lever 7 rotates to the left against the force of the spring 8. Therefore, the cam surface 7& of the drive lever 7 rotates out of the trajectory of the standing part 3b of the sector opening/closing lever 3, so the driving force of the driving member 5 to the sector opening/closing lever 3 is cut off, and the sector opening/closing lever 5 is moved by the spring 4. Turn left to close sector 2.

Here, since the movable iron piece 14 is stopped at the raised position,
When the sector opening/closing lever 3 tries to rotate in the direction of opening the sector 2 again due to bounce or the like, the projection 3d of the sector opening/closing lever 3 comes into contact with the surface 14/ of the movable iron piece 14 and prevents it.

In the above operation, as the drive member 5 moves to the right, the pin 5j releases the pressure from the spring 21-, and the iron piece lever pawl 21 rises to the spring 216, and the locking stage 21g moves to the curved part of the movable iron piece 14. Turn right to the position where it does not lock.

At the end of photographing, when the pressure on the release member 1'1 is removed, the release member 11 is raised by the spring 12. At this time, the pin 11/ of the release member 11 causes the interlocking lever 13 to rotate to the left, and the movable iron piece 14 also returns to its initial position. When the IJ-z member 11 is at the raised stop position, the switch 19 is opened and the shutter circuit is de-energized.

When charging the shutter for the next photograph, when the drive member 5 is moved to the left against the spring 6, the slope 7d of the drive lever 7 engages with the standing portion 36 of the opening/closing lever 3. Turn the drive lever 7 to the left so that the cam surface 7b is aligned with the standing part 3b.
At the point where they pass through, both return to the state shown in the figure, the protrusion 5- is locked to the stand-up part 9b, and charging is completed in the state shown.

Next, to explain case 1 of flash-out operation, first, the changeover switch 22 is switched to the b side, the electronic switching circuit I for automatic exposure control is deactivated, and the flash device 1 is placed in the activated state. Make it.

As in the case described above, when the release member 11 is pushed down, the switch 19 closes and the main capacitors of the flash device 7 -
is charged.

Due to the changeover switch 22, the electronic switching circuit l is not energized and the iron core 15 is not energized.

7, because the movable iron piece 14 is not attracted to the iron core 15.
191 rows of bin 14a'ft with oak i% 15a, move the movable iron piece 14 upward until the curved part of the movable iron piece 14 engages with the locking part 21c of the iron piece lever pawl 21, and then move the release member 11. When pressed down, the spring 17 is charged, and the pin 11- then turns the locking pawl 9 to the right to disengage the standing portion 9b and the protrusion 5-.

When the drive member 5 is released, it moves to the right by the spring 6, and the pin 5j releases the pressure from the spring 21-. Therefore, the force of the spring 216 cannot turn the movable iron piece 14 to the right.

When the drive member 5 moves further to the right, the drive lever 7
The cam surface 76 of the opening/closing lever 3 carries the standing part 3b of the opening/closing lever 3, rotates the opening/closing lever 3 to the right around the shaft 3a, and rotates the opening/closing lever 3 to the right around the shaft 3a.
open.

The drive member 5 opens the sector 2 while being delayed by the governor 16 to provide a typical intermediate exposure (e.g. IFB,
1/125 seconds), the protrusion 541 moves to the protrusion 21d.
Press to turn the iron piece lever pawl 21 to the right around the shaft 21α.

When the iron piece lever pawl 21 turns to the right, the locking stage 21C releases the locking of the curved part of the movable iron piece 14, and the movable iron piece 14
7 moves upward along the grooves 14α and 14b, and as in the case described above, the projection 14f turns the drive lever 7 to the left and releases the engagement between the cam surface 7b and the vertical portion 3b. ,
The opening/closing lever 3 is rotated to the left around the axis 3α by the spring 4 to close the sector 2 and complete the exposure.

Note that when the movable iron piece 14 moves upward, the synchro switch 23 is closed, so the flash discharge tube Xs is ignited by the trigger circuit B, and the subject is illuminated. At the same time, the light receiving element S inputs the illumination state of the subject to the light emission stop circuit,
Flash discharge tube Xe when illuminated with proper exposure condition 1Ilt
stops emitting light.

Since the discharge tube Xs is ignited and stopped when the trout is caught, the protrusion 14f disengages the cam surface 7b of the drive lever 7 and the vertical portion 3b, and before the opening/closing lever 3 closes the sector 2. It will be done.

As is clear from the above description, according to the present invention, even when the electronic shutter and the flash device are operated using a single power supply battery Q, when the flash device is used, the electronic shutter cannot be operated. Since constant exposure operation is performed mechanically without the need for power supply, even if the flash device consumes a lot of current, it will not affect the exposure operation, and there is no current consumption on the shutter side, so you can save money. It is also extremely beneficial.

It goes without saying that even if the flash device F is a normal light-emitting type and does not have a light-receiving element, it is still possible to take photographs that are suitable for viewing and serve as commemorative snapshots.

[Brief explanation of the drawing]

The figure is a plan view showing the charging state of the electronic program shutter of the present invention, and in the figure, 1...shutter board 2...sector 3...sector opening/closing lever 5...drive member 7...・Drive lever 11...Release member 15...Interlocking lever 14...Movable iron piece (iron piece Leno (-) 15...Iron core 21...Iron piece/claw 22...with a changeover switch Yes. Applicant: Seiko Koki Co., Ltd. Agent, Patent Attorney: Tsutomu Mogami

Claims (1)

[Claims] In a camera that controls a flash device and an electronic shutter with a single power source, an electronic shutter that automatically controls exposure by controlling an electromagnet with an electronic circuit according to the brightness of the subject;
A mode switching device that switches between automatic exposure operation using natural light and flash exposure operation, switching means that switches the electronic shutter to mechanical constant exposure, and a flash device that starts in synchronization with the electronic shutter, and the mode switching device switching the device from automatic natural light exposure operation to flash exposure operation, disabling the electronic circuit and activating the switching means, switching the electronic shutter to mechanical constant exposure and activating the flash device; A camera with an electronic shutter.