JPS5824127A - Shutter of camera - Google Patents

Abstract

PURPOSE:To deeply set the depth of an object freely, by automatically switching to a program shutter and an aperture-priority shutter, in case when a camera-to- subject distance is larger than a prescribed distance, and in case when it is smaller than the prescribed distance, respectively. CONSTITUTION:A pair of apertures and sectors 1, 1 are attached pivotally by pins 2, 2, respectively, so that opening and closing of an exposure hole are controlled. Also, according to this invention, in case of regular photographing, an opening and closing member 8 for opening and closing the sectors 1, 1 is closed by a constant timing, and they are closed by the member, and on the other hand, in case of close-up photographing, an open-operation of the opening and closing member 8 interlocked with an aperture cam 30 is pressed against and stopped at a prescribed aperture value position by an aperture deciding member 25, and they are close-operated by the closing member. Accordingly, this shutter is operated as a program shutter in case of regular photographing, is operated as an aperture-priority shutter in case of close-up photographing, and the depth of field can be deeply set freely.

Description

[Detailed description of the invention] The present invention relates to a camera shutter.

Conventionally, the so-called program shutter has been widely used as a camera shutter. Although the program shutter does not have any problems during normal shooting, the brightness may vary when shooting at close range (for example, at a distance of 80 degrees or less). Since the aperture value changes, there is a problem in that the depth of field cannot be set freely.

In addition, in medium and large format cameras, the lens board and camera body are separated, so there is a problem that the shutter locking mechanism becomes complicated.

The present invention has been made in view of the above-mentioned conventional problems.
Basically, it operates as a program shutter during normal shooting, but when shooting close-up, it operates as an aperture-priority shutter, allowing you to freely set the depth of field and allowing shutter adjustment using only the lens board side. The purpose of this is to enable it to operate as a self-locking shutter.

For this reason, the present invention is designed to automatically switch to a program shutter when the photographing distance is greater than a predetermined position, and to automatically switch to an aperture priority shutter when the photographing distance is smaller than a predetermined position, based on the photographing distance information.

The second invention according to the present invention is a shutter locking operation and a release operation using a shutter release signal.
an opening/closing member for opening and closing a shutter blade that also serves as an aperture; a locking member for locking the opening/closing member in a charging position when the driving means is in a locking operation; and a locking member for locking the opening/closing member in a charging position during a release operation of the driving means The device is characterized by comprising an operating member that releases the locking member, and a closing member that operates the opening/closing member in the closing direction depending on the amount of light.

In addition to the second invention, the invention of the present invention in p. 3 disables the aperture determining member during flash photography,
This device is characterized in that it includes a regulating member that interlocks with the distance ring and stops the opening operation of the opening/closing member at a predetermined aperture value position, so that flash photography can be performed appropriately.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numerals 1 and 1 designate a pair of shutter blades that also serve as an aperture, which are pivotally mounted by pins 2 and 2, respectively, and control the opening and closing of the exposure hole 3.

Reference numeral 4 denotes a light receiving element (spc) that measures incident light from the photometric holes 5n, 5a, 5b, and 5b of the shutter blade 1.1.

Reference numeral 6 denotes an operating magnet, which is biased in the release direction (in the direction of the downward arrow) by a plunger 7 spring (not shown).
At the time of excitation, it is attracted in the upward direction.

Reference numeral 8 denotes an opening/closing lever, the central part of which is pivoted by a pin 9, and the aperture pin 10 at the tip of the opening/closing lever.
a, open and close the shutter blades 1 and 1 at the same time, and with the closing pin 11 held against a closing lever 18 (described later), a spring (not shown) moves the shutter in the opening direction (counterclockwise arrow direction). ) is energized.

Reference numeral 12 designates a locking lever, whose upper portion is pivotally connected by a pin 13, and is biased by a spring (not shown) in the locking direction (clockwise arrow direction) to lock the opening/closing lever 8 in the charging position.

Reference numeral 14 designates an operating lever, whose central portion is coaxially pivoted with the pin 9, has a linking pin 15 at its tip, and locks the locking lever 11 with a linking pin 16 that is integrally connected to the plunger 7 at its rear. It has a release pin 17 for release.

Reference numeral 18 denotes a closing lever, whose center part is coaxially pivoted with the pin 9, has a linking pin 19 linked to the operating lever 14 on the left side, and has an adsorption piece 21 on the right side that is attracted and held by the closing magnet 20. The opening/closing lever 8 is operated by a spring (not shown).
is biased in the shutter closing direction (clockwise arrow direction).

Reference numeral 25 denotes an aperture setting lever, the center part of which is pivoted with a pin 26, the right part having an adsorption piece 28 that is attracted and held by an aperture priority AE magnet 27, and the upper part of which is fixed by a spring (not shown) for manual aperture control. It is biased in the direction of contact with the aperture cam 30 that is interlocked with the dial 29 (in the direction of the counterclockwise arrow). Aperture cam 30
In this case, a resistor 31 that detects the aperture value of the aperture cam 30 is linked.

Reference numeral 32 designates an FM lever, whose central portion is coaxially pivoted to the pin 26, has an adsorption piece 34 on the right side that is suctioned and held by the FM magnet 33, and is moved by a spring (not shown) to the roller 35 on the left side. is biased in the direction (counterclockwise arrow direction) in which the manual operation distance ring 36 comes into contact with the FM cam 37.

The right-hand portions of the diaphragm determining lever 25 and the FM lever 32 are linked to the diaphragm pin 10 of the opening/closing lever 8 and the linking pin 15 of the operating lever 14, respectively.

The action of the shutter configured as above is shown in the operation timing diagram of Fig. 2, Fig. 3 (I) to (■), and Fig. 4 (I) to
This will be explained with reference to the operation exploded diagram (■).

[Normal shooting (Program AE)] fI) Initial state (Fig. 3 (■)) Operating magnet 6, closing magnet 20, aperture priority AE
Magnet 27. The FM magnet 33 is off and the shutter blades 1, 1 are in a closed state.

(2) Start of operation (Figure 3 (ID)) Closing magnet 20 and aperture priority AE magnet 27, F
The M magnet 33 turns on, and the operating magnet 6
is turned on and the plunger 7 is sucked (upward), the operating lever 14 interlocked with the connecting pin 16 swings counterclockwise, and the release pin 17 swings the locking lever 12 clockwise, putting the opening/closing lever 8 in the charged state. Lock it with.

Tsukudaoking finished (Fig. 3 M))
When the I-operation lever 14 swings counterclockwise, the aperture setting lever 25. The FM lever 32 is swung clockwise and the suction piece 28.34 is moved to the aperture priority AE magnet 27. At the same time as being attracted to the FM magnet 33, the closing lever 18 is swung counterclockwise by the closing pin 11, and the attracting piece 2
1 closes and is adsorbed by the magnet 20, and the tricking is completed.

(Turn) Start of return (Fig. 3 (to)) The operating magnet 6 is turned off and the plunger 7 begins to protrude in the release direction (downward) with a spring.

M release (Fig. 3 M) When the plunger 7 protrudes, the lever 1 is operated by the connecting pin 16.
4 is swung clockwise, and the locking lever 12 is swung in the locking release direction I by the release pin 17.

(2) Exposure (Fig. 3 1 (VD)) When the locking lever 12 is released, the opening/closing lever 8 swings in the shutter opening direction (counterclockwise) by the spring, and the aperture pin 1
0 causes the shutter blades 1, 1 to be opened.

(■) End of exposure (Fig. 3 (4)) After the opening operation of the shutter blades 1, 1 starts, when the closing magnet 20 is turned off at the time when the EV value complement matches, the closing lever 18 is moved by the spring in the closing direction (clockwise). ), its left shoulder contacts the closing pin 11, forcing the opening/closing lever 8 to swing in the shutter closing direction (clockwise), and the aperture pin 10
The shutter blades 1, 1 are operated to close.

(■) Operation completed (Fig. 3 (■)) The shutter blades 1.1 are closed by the swinging of the opening/closing lever 8 in the shutter closing direction, and the aperture priority AE magnet 27. FM
The magnet 33 is turned off, returning to the initial state shown in FIG. 3(I), and the program AE during normal photographing ends.

For FM shooting during normal shooting, since the absolute light intensity is insufficient at a distance of 3 m or more, only an insufficient warning will be issued.
Below, FM operates at distances up to 80 cM.

[During close-up shooting (aperture priority AE)] (I) Initial state (Fig. 4 (■)) Operating magnet 6, closing magnet 20, aperture priority AE
Magnet 27. The FM magnet 33 is off and the shutter blades 1, 1 are in a closed state.

(2) Start of operation (Fig. 4 (5)) Closing magnet 20. The FM magnet 33 is on, the aperture priority AE magnet 27 is off, and the operating magnet 6 is on, attracting the plunger 7 (upwards).
Then, the operation lever 14 interlocked with the connecting pin 16 swings counterclockwise, and the lock lever 12 swings clockwise by the release pin 17, thereby locking the opening/closing lever 8 in the charged state.

(2) Consultation with Kotsuking (Fig. 4 (■)) Operation lever 14
The aperture setting lever 2 is rotated counterclockwise by the linking pin 15.
5. The FM lever 32 is swung clockwise, and only the attraction piece 34 is attracted to the FM magnet 33, and the closing pin 1
1, the closing lever 18 is swung counterclockwise, the attraction piece 21 is attracted to the closing magnet 20, and the locking is completed.

■Start of return (Fig. 4 (■)) The operating magnet 6 turns off and the plunger 7 begins to protrude in the release direction (downward) with a spring.

M release (Fig. 4 M) When the plunger 7 protrudes, the lever 1 is activated by the connecting pin 16.
4 is swung clockwise, the locking lever 12 is swung in the unlocking direction by the release pin 17, and the diaphragm cam 3o is swung counterclockwise following the operating lever 14. can be stopped by.

■Exposure (Fig. 4M) When the locking lever 12 is released, the opening/closing lever 8 swings in the shutter opening direction (counterclockwise) by the spring, and the aperture pin 1
0 causes the shutter blades 1, 1 to be opened. That is, after the opening operation of the shutter blades 1, 1 is started, the opening/closing lever 8 is stopped against the aperture setting lever 25 whose swing angle is regulated by the aperture cam 3o to determine the aperture opening degree, and the pin 9 of the opening/closing lever is Since it hits the lever 25, it is stopped at the set aperture. Aperture priority shooting is possible.

(■) End of exposure (Fig. 4 (■)) Then, when the closing magnet 2o is turned off, the closing lever 18 swings in the closing direction (clockwise) by the spring, and its left shoulder hits the closing pin 11. The opening/closing lever 8 is forcibly swung in the shutter closing direction (clockwise), and the shutter blade 1.1 is operated to close by the aperture pin 10.

(■) Operation ends (Fig. 4 (■)) Shutter blades 1, 1 are closed by swinging of the opening/closing lever 8 in the shutter closing direction, and the FM magnet 33 is turned off and the fourth
Return to the initial state shown in Figure (I) and use aperture priority AE for close-up photography.
ends.

For FM shooting during close-up shooting, use manual distance ring 3.
The FM magnet 33 is turned on by the switch linked to the FM cam 37 of No. 6, the aperture priority AE magnet 27 is turned on, and the aperture setting lever 25 is swung clockwise by the linking pin 18 to attract the suction piece 28. At the same time, the FM lever 32 is swung by the FM cam 37, and the swing angle of the open/close lever 8 is regulated by the FM cam 37.
The aperture opening degree is determined by being held against the M lever 32.

FIG. 5 shows an example of the shutter and strobe controller configured as described above.

40 is an ASA conversion step ND filter, 41 is an auxiliary aperture, 42 is a photometry control device, 43 is a controller/X6 regulator,
44 is an LED driver, 45 is a strobe warning LED, 4
6 is a strobe controller, and 4I is a light emitting unit.

SW is the photometry start switch, and SW2 is the photometry/warning switch, both of which are linked to the release button. SW3
is a strobe control signal input switch, and switch SW5. will be described later. Linked to SW6.

SW 4 is a strobe power switch. SW5 is a proximity FM switch, SW6 is an FM time constant switch, and switches SW4. Linked to SW3. SW7 is a close-up aperture priority AE switch, and SWP is a power switch.

FIG. 6 shows a flowchart of the electrical system sequence during normal photography, and FIG. 7 shows a flowchart of the electrical system sequence during close-up photography.

In the above embodiment, the FM lever 32, the FM magnet 33
However, as shown in Fig. 8, a variable resistor 38 is provided in the manual distance ring 36, and its contact 39 is connected to a CR time constant circuit 40 to control the amount of charge. On the other hand, if the closed magnet 20 is configured to cut off the signal from the light receiving element 4 and turn off using the signal from the CR time constant circuit 40, then from the above explanation, the electric FM method % formula % As is clear, in the present invention, during normal photography, the opening/closing member that opens and closes the shutter blade is operated by the closing member at a fixed timing, while during close-up photography, the opening/closing member is operated in conjunction with the aperture cam. The opening operation is stopped at a predetermined aperture value position by an aperture setting member, and the closing member is used to close the shutter, so it operates as a program shutter during normal shooting, and has aperture priority during close-up shooting. It can be operated as a shutter, allowing you to freely set the depth of field when taking close-up shots.

Further, the operating member is interlocked with the driving means that performs the locking operation and the release operation in response to the shutter signal, and releases the locking member that locks the opening/closing member in the charging position.
Since the closing member returns the opening/closing member to the charging position, it is possible to release and charge the shutter with just the shutter signal, eliminating the need for a shutter locking mechanism between the camera body and the lens board. , remote control release is possible, making it suitable for use in medium and large format cameras.

Furthermore, another invention related to the present invention is that a regulating member is provided to stop the opening operation of the opening/closing member at a predetermined aperture value position in conjunction with the distance ring during close-up photography with a flash. It becomes possible to properly perform flash photography when taking pictures.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the shutter of the first embodiment, FIG. 2 is an operation timing diagram, and FIGS. 3 (I) to (2) are operational exploded front views showing the operating states of the shutter during normal shooting, respectively. Figure 4 (■) to (■) are for close-up photography.
Fig. 5 is a circuit diagram of the shutter and strobe controller, and Fig. 6 is an electrical system sequence during normal shooting.
7 is a flowchart of the electrical system sequence during close-up photography, and FIG. 8 is a perspective view of the shutter of the second embodiment. 1... Shutter blade that also serves as an aperture, 4... Light receiving element,
6... Operating magnet, 7... Plunger, 8-...
・Opening/closing lever, 10... Aperture pin, 11-... Closing pin, 12... Locking lever, 14... Operating lever, 1
8... Closing lever, 20... Closing magnet, 25
-... Aperture setting lever, 27... Aperture priority AE magnet, 30 - Aperture cam, 32... FM lever, 33
...FM magnet, 36...manual operation distance ring,
37...FM cam, 38...variable resistor, 40...
・CR time constant circuit. Patent applicant Fuji Photo Film Co., Ltd. Agent Patent attorney Aoyama Aoyama and two others Figure 3 (Yn) Figure 4 (I) Figure 4 (Sffi) Figure 4 (V, Figure 5, Figure 6) Figure 7 Figure 8. Procedural amendment (voluntary) September 16, 1981 Patent Application No. 123460 2, Name of invention Camera shutter 3, Person making the amendment 4, Agent 5, Amendment Date of order (self-issued) 7. Contents of the amendment Page 10, lines 13 to 16 ``For FM shooting during normal shooting, the absolute light intensity is insufficient at a distance of 3 meters or more, so only an insufficient warning will be issued. 3
FM operates at distances below m and up to 80(7). ” will be deleted. that's all

Claims (6)

[Claims] (1) A camera shutter characterized by automatically switching to a program shutter when the photographing distance is greater than a predetermined position and to an aperture priority shutter when the photographing distance is smaller than a predetermined position, depending on photographing distance information. (2) A driving means that performs a locking operation and a release operation of the shutter in response to a shutter release signal, an opening/closing member that opens and closes the shutter blades that also serves as an aperture, and a locking member that locks the opening/closing member in the charging position when the driving means performs the locking operation. The device is characterized by comprising a locking member, an operating member that releases the locking member when the drive means releases the locking member, and a closing member that operates the opening/closing member in the closing direction according to a light amount value. camera shutter. (3) The camera shutter according to claim 2, further comprising an aperture determining member that interlocks with the aperture cam and stops the opening operation of the opening/closing member at a predetermined aperture value position. camera shutter. (4) A drive means that performs the locking operation and release operation of the shutter in response to a shutter release signal, an opening/closing member that opens and closes the shutter blades that also serves as an aperture, and an opening/closing member that operates in conjunction with the aperture cam during the locking operation of the drive means. The diaphragm-determining member that stops the opening operation at a predetermined diaphragm position and the diaphragm-determining member that interlocks with the distance ring and stops the opening operation of the opening/closing member at a predetermined diaphragm position are charged, and the opening/closing member is locked at the charging position. a locking member, an operating member that releases the locking member when the drive means releases the locking member, a closing member that operates the opening/closing member in the closing direction depending on the amount of light, and a closing member that operates the opening/closing member in conjunction with the aperture cam. An aperture-determining member that stops the opening operation at a predetermined aperture value position, and a regulation that disables the aperture-determining member and stops the opening operation of the opening/closing member at a predetermined aperture value position in conjunction with a distance ring during flash photography. A camera shirt starter 0 characterized by comprising: (5) The camera shutter according to claim 4, wherein the distance ring is provided with an FM cam, and the regulating member is an FM member that is linked to the FM cam. (6) A patent characterized in that the distance ring is provided with a variable resistor, and the regulating member is the closing member controlled by a signal from a CR time constant circuit whose opening amount is adjusted by the variable resistor. A camera shutter according to claim 4.