JP3734914B2 - Shutter opening / closing operation detection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shutter opening / closing operation detection device, and more particularly to a shutter opening / closing operation detection device that is incorporated in a shutter device such as a camera or a film unit with a lens and obtains an operation signal corresponding to the opening / closing operation of the shutter. is there.
[0002]
[Prior art]
As a shutter device used for an inexpensive camera or a lens-fitted photo film unit, one that reciprocally swings one or two or more shutter blades to open and close the shutter opening is known. In these shutter blade swing type shutter mechanisms, the shutter opening is sealed by the shutter blade when the drive source is accumulated, and the shutter opening is opened in response to the accumulation release of the drive source, and after a suitable time has passed, the original is restored. Return to the position of and close the shutter opening.
[0003]
Such a shutter mechanism often incorporates a switch for extracting various signals. For example, an opening operation detecting switch for detecting the opening start of the shutter blade, a closing operation completion detecting switch for detecting the closing start of the shutter blade, and a fully opening detecting switch for detecting that the shutter blade substantially fully opens the shutter opening. It is. It is well known that the fully open detection switch is used as a synchro switch.
[0004]
The structure of the synchro switch is composed of a pair of contact pieces as proposed in Japanese Utility Model Publication No. 6-41227. One contact piece is provided so that one end is located in the movement path of the shutter member, and is bent by pressing the shutter blade when the shutter blade is in the open position, and the other contact piece is bent. The position of the tip is determined so that a part of the tip contacts the piece.
[0005]
The opening operation detection switch and the closing operation detection completion switch are used, for example, as timing switches for turning on and off a light source for data copying onto a photographic film.
[0006]
A camera that records optical information on a photographic film requires a light source, control means, data means, and the like. The light source provides illumination light to the data means. As this light source, one using an LED or one using a light bulb is known. The data means has a plurality of imprint data, and switches data to be imprinted on the front side or the rear side of the photographic film in conjunction with the selection operation of the operation member provided to be externally operable.
[0007]
The control means is for controlling the time during which the light emitted from the light source is exposed to the photographic film to be constant, and in general, it is often controlled in conjunction with the opening and closing of the shutter. For example, the light source may be controlled to be turned on when the shutter opens and the light source may be turned off when the shutter is closed. Therefore, if a light source lighting circuit including a switch for detecting the start of opening of the shutter and a switch for detecting the completion of closing of the shutter is used, it can be achieved with an inexpensive and simple structure.
[0008]
[Problems to be solved by the invention]
However, when two switches, a switch that detects the start of opening of the shutter and a switch that detects the completion of closing of the shutter, are used, when one switch is closed, the other switch is opened so that the other switch is open. A mechanism linked to the equation is required, which increases the cost. Since the shutter mechanism is a single reciprocating swing type as described above, the opening position of the shutter blade and the closing completion position of the shutter blade are substantially the same position, and it is difficult to arrange these switches in terms of space. It becomes.
[0009]
In addition, when these switches are also used as a single switch, this switch may be turned on at the opening start position and turned off when returning to this position again. It is necessary to maintain it in the ON state. Thus, in order to maintain the switch in the ON state during the opening / closing operation, the switch is pressed by the shutter blade itself, so that the shutter opening / closing speed becomes unstable.
[0010]
The present invention is intended to solve the above problems, and provides a shutter opening / closing operation detection device that is inexpensive and can be achieved with a simple configuration, and that is devised so as not to adversely affect the opening / closing operation of the shutter blades. For the purpose.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the invention described in claim 1, an elastically deformable first contact piece whose one end protrudes into a moving area of an operating piece provided on the shutter blade, and the first contact piece and a switching operation. The first contact piece is bent by the pressing of the operating piece when the shutter blade is in the closed position, and maintains the first switching state with respect to the second contact piece, When the operating piece is moved by releasing the shutter blade and the pressure is released, the operating piece is restored and deformed to switch to the second switching state with respect to the second contact piece, and the first contact piece is at the release completion position. The bent arm is bent by pressing the kicking arm and switched from the second switching state to the first switching state.
[0012]
The kicking arm moves from the release completion position to the charge position in response to the shutter charge operation, and moves from the charge position to the release completion position in response to the shutter release operation. The shutter blade is kicked in the process of moving the kicking arm from the charging position to the release completion position, opens the shutter opening, and closes the shutter opening again by urging the return spring. The kicking arm moves to the release completion position before the shutter blades return to the closed position.
[0013]
When the shutter blade is in the closed position, the operating piece of the shutter blade presses the first contact piece, and the first switching state between the second contact piece is maintained by the bending of the first contact piece. When the shutter blades start to open, the pressure on the first contact piece is released. Thereby, the first contact piece is restored and deformed and switched to the second switching state with respect to the second contact piece. The kicking arm returns to the release completion position before the shutter blades return to the closed position, and at this time, the first contact piece is pressed and bent to switch from the second switching state to the first switching state.
[0014]
By the way, when the kicking arm moves to the release completion position, the first contact piece is bent to switch from the second switching state to the first switching state. Thereafter, the shutter blades return to the closed position. At this time, if the first contact piece is further bent by the operating piece of the shutter blade, the shutter blade opens and closes again toward the open position due to the elasticity of the first contact piece, and double exposure may occur. . For this reason, in the invention described in claim 2, the amount of bending of the first contact piece due to the pressing of the kicking arm is made larger than the amount of bending when the shutter blade is in the closed position. According to this, even when the shutter blade returns to the closed position after the kicking arm returns to the release completion position, the amount of the operating piece that presses and bends the first contact piece can be reduced. Thereafter, when a shutter charge operation is performed, the kicking arm moves from the release completion position to the charge position. At this time, the pressing of the first contact piece is released, but the first switching state is then maintained by the operating piece of the shutter blade.
[0015]
According to a third aspect of the present invention, the tip of one end of the first contact piece is curved in a direction away from the moving area of the operating piece of the shutter blade. Accordingly, when the shutter blade returns to the closed position after the kicking arm returns to the release completion position, the impact of the operating piece colliding with the first contact piece can be absorbed by the curved portion.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 2, the film unit 9 is composed of a unit main body 10 in which a photographic film cartridge, various photographing mechanisms, an optical information recording mechanism, and the like are incorporated, and an exterior body 11 that covers part or all of the unit main body 10. Yes. As shown in FIG. 3, a selection operation member 12 for determining the print size before photographing is provided on the back surface of the film unit 9. There are three types of print sizes, such as indices C, H, and P shown in the figure, and by adjusting the selection operation member 12 to a desired index before shooting, the range of the shooting frame of the photographic film for each shooting In addition, optical information corresponding to the selection operation is recorded.
[0017]
As shown in FIG. 4, the unit main body 10 includes a front cover 13, a main body base 14, an exposure unit 15, a strobe unit 16, a photographic film cartridge 17, and a rear cover 18. The main body base 14 has a cartridge storage chamber 21 in which a cartridge 20 is stored on one side with an aperture 19 in between, and a film roll in which a film roll 22a in which a photographic film 22 is drawn out from the cartridge 20 in a roll shape is stored on the other side. The chambers 23 are integrally provided.
[0018]
The rear cover 18 is provided with pull-top type bottom covers 24 and 25 for closing the bottoms of the cartridge storage chamber 21 and the film roll chamber 23, respectively. After the rear cover 18 is attached, the bottoms of the chambers 21 and 23 are closed by the bottom lids 24 and 25, so that the photographic film cartridge 17 is stored in a light-tight manner with the main body base 14. A bottom cover 24 that closes the bottom of the cartridge storage chamber 21 is a cover that is opened when the cartridge 20 storing the photographic film 22 that has been photographed at the developing station is taken out.
[0019]
A winding knob 26 is rotatably provided on the cartridge storage chamber 21. A part of the winding knob 26 is exposed from the opening 27 of the rear cover 18. When the film winding operation is performed, the unexposed photographic film 22 is pulled out from the film roll chamber 23 and set in the aperture 19. At the same time, the exposed photographic film 22 is stored in the cartridge 20.
[0020]
The shutter button 28 is provided on the upper surface of the front cover 13 so as to be elastically cut out. The shutter button 28 operates the shutter mechanism of the exposure unit 15 by a pressing operation. The shutter mechanism is a type in which the shutter blade swings in front of the shutter opening. When the shutter blade swings, the subject light passes through the photographing window 13a of the front cover 13 and the photographing lens 29 of the exposure unit 15 and enters the photographic film 22 set in the aperture 19 through the shutter opening. . A dark room is formed between the shutter opening and the aperture 19 by a dark box 30 provided in the exposure unit 15.
[0021]
The strobe unit 16 is a unit in which a main capacitor 32, a power source battery 33, a sync switch 34, a strobe light emitting unit 35, and the like are integrally attached to a strobe board 31 having a power circuit, a strobe charging circuit, a strobe light emitting circuit, and the like. It is a part. The power supply battery 33 in this example is an AA battery.
[0022]
When the strobe charging switch 36 provided on the front surface of the front cover 13 is pressed, the strobe charging circuit is closed, and the voltage of the power supply battery 33 is boosted to charge the main capacitor 32. Thereafter, when the shutter blades are fully opened in response to the shutter release, the synchro switch 34 is turned ON and a trigger signal is given to the discharge tube inside the strobe light emitting unit 35, and is stored in the main capacitor 32 in response thereto. The discharge tube emits light by the charged voltage, and the strobe light emitting unit 35 emits strobe light. The strobe light illuminates the subject through the strobe light emission window 37 of the front cover 13.
[0023]
The strobe substrate 31 is provided with a light bulb 38 constituting an optical information recording mechanism and a lighting control switch 39. The light bulb 38 is a light source for capturing optical information. The lighting control switch 39 is a switch for controlling the lighting time of the light bulb 38 and constitutes a lighting circuit together with the light bulb 38.
[0024]
The lighting circuit is a circuit that turns on the light bulb 38 by causing a predetermined amount of current to flow through the light bulb 38 in response to the lighting control switch 39 being turned on, and is provided on the strobe board 31.
[0025]
The exposure unit 23 includes a photographing lens 28, a shutter mechanism, a film winding stop mechanism, a shutter charge mechanism, a film counter mechanism, and the like. As shown in FIG. 5, a shutter blade 40, a sprocket 41, and a shutter drive are provided. It comprises a lever 42, a locking lever 43, a charge cam 44, a winding stop cam 45, a number display plate 46, and the like.
[0026]
The sprocket 41 is provided with a plurality of teeth that engage with the perforation of the photographic film 22 and is rotated halfway by winding and transferring one frame of the photographic film 22. The winding transfer direction is the arrow direction shown in FIG.
[0027]
The rotation of the sprocket 41 is transmitted to the charge cam 44 and the winding cam 45, and the locking lever 43 is rotated to the winding position by winding and transferring one frame. When rotated to the winding position, the locking lever 43 engages with the winding cam 45 and the winding knob 26 to prevent the rotation of the sprocket 41 and the rotation operation of the winding knob 26. During this time, the rotation of the charge cam 44 causes the shutter drive lever 42 to be charged to the charge position, and the locking lever 43 at the winding stop position is held at this position. Further, using the rotation of the winding cam 45 during this period, the two-tooth gear 47 advances the number display plate 46 by one scale.
[0028]
When the shutter button 28 is pressed down in almost the entire stroke, the rod bar 28a provided integrally with the lower part of the shutter button 28 pushes the locking lever 43 to rotate the locking lever 43 from the winding position to the winding release position. Let As a result, the latch lever 43 releases the holding of the shutter drive lever 42, and the shutter drive lever 42 is instantaneously rotated from the charge position toward the release completion position by the urging of the charge spring 49. During the rotation, the kicking arm 42a of the shutter drive lever 42 kicks one end 40a of the shutter blade 40.
[0029]
The shutter blade 40 is provided so as to be rotatable about a shaft 40b, and a shielding portion 40c that shields the shutter opening 50 is provided on the opposite side to the one end 40a across the shaft 40b. When the one end 40 a is kicked off, the shielding portion 40 c rotates to the open position where the shutter opening 50 is opened, and thereafter, the shielding portion 40 c is returned to the closed position where the shutter opening 50 is closed by the urging of the return spring 51. A sync switch 34 is located near the one end 40a.
[0030]
The synchro switch 34 is provided so that one end thereof is positioned in the movement path of the shutter blade 40, and is a first sync contact piece for synchronization that is bent by the pressing of the operating piece 40d of the shutter blade 40 when the shutter blade 40 is in the open position. 34a and a second sync contact piece 34b whose tip is positioned so that a part of the tip contacts the bent first sync contact piece 34a.
[0031]
A lighting control switch 39 is disposed on the synchro switch 34. The lighting control switch 39 is composed of an elastically deformable first contact piece having one end protruding into a moving area of an operation piece provided on the shutter blade 40, and a second contact piece that performs a switching operation with the first contact piece. ing.
[0032]
Specifically, as shown in FIG. 1, the first contact piece 39 a is bent at one end positioned in the moving path of the shutter blade 40 when the shutter blade 40 is in the closed position by pressing the operating piece 40 d provided on the shutter blade 40. Is done. The second contact piece 39a is separated from the bent first contact piece 39a, and a part of the tip contacts the first contact piece 39a when the operating piece 40d is released and the first contact piece 39a returns to its original position. As such, the position of the tip is determined. Therefore, the first contact piece 39a and the second contact piece 39b are in contact with each other when there is no load.
[0033]
The first contact piece 39a is bent by the pressing of the operating piece 40d when the shutter blade 40 is in the closed position, and maintains the first switching state, that is, the electrically OFF state with respect to the second contact piece 39b. When the operating piece 40d is moved by releasing the shutter blade 40 and the pressure is released, the operating piece 40d is restored and deformed, and the second contact piece 39b is switched to the second switching state, that is, electrically turned on. The first contact piece 39a is bent by the pressing of the kicking arm 42a moved to the release completion position, and is switched from the second switching state to the first switching state.
[0034]
As described above, when the shutter opening / closing operation completion is detected, the switch 39 is turned OFF by pressing the kicking arm 42a. This is because, when the switch 39 is turned off by the shutter blade 40, the bent first contact piece 39a pushes the shutter blade 40 toward the open position again by the elastic force to return to the original position, and bounces. This is because there is an inconvenience that causes double exposure.
[0035]
As a means for preventing such inconvenience, in this example, the amount of bending of the first contact piece 39a due to the pressing of the kicking arm 42a is set to be larger than the amount of bending of the operating piece 40d when the shutter blade 40 is in the closed position. It is getting bigger. Here, the position where the operating piece 40d bends the first contact piece 39a is closer to the root than the position where the kicking arm 42a bends. Therefore, the operating piece 40d of the shutter blade 40 that has returned to the closed position does not come into contact with the first contact piece 39a bent by the kicking arm 42a, and the amount of contact of the operating piece 40d can be reduced. Thereby, double exposure can be reduced as much as possible.
[0036]
Furthermore, in this example, the tip of one end of the first contact piece 39a is curved in a direction away from the moving area of the operating piece 40d. Thereby, even if the operating piece 40d of the shutter blade 40 returned to the closed position comes into contact with the first contact piece 39a bent by the kicking arm 42a, the impact of the operating piece 40d can be absorbed by this curved portion. Thus, it is possible to prevent double exposure.
[0037]
The opening / closing time of the shutter blade 40 is determined by the kicking force of the shutter drive lever 42 and the biasing force of the return spring 51. In addition, the amount of movement of the kicking arm 42a is also determined. Therefore, the lighting control switch 39 has a constant time for turning on in conjunction with the opening and closing of the shutter blades 40.
[0038]
Reference numeral 19 a indicates the range of a shooting frame formed with a size corresponding to the aperture 19. The aperture 19 is formed on the back surface of the dark box 30. Another light shielding box 52 is formed below the dark box 30. The light shielding box 52 is provided in the exposure unit 15, and a light bulb 38, a copy information board 53, and an information switching board 54 are incorporated therein. The optical information is composed of, for example, a combination of 2-bit dots, and two holes for forming these dots on the photographic film 22 are formed in the imprint information board 53 side by side in the film feeding direction. Yes.
[0039]
The information switching plate 54 is incorporated on the front surface of the imprint information plate 53 so as to be movable in the film feeding direction, and is connected to the selection operation member 12 exposed on the back surface of the rear cover 18. The information switching plate 54 is formed with an opening that exposes one or both of the two holes of the imprint information plate 53 by moving according to the selection operation of the selection operation member 12. ing.
[0040]
FIG. 7 shows a lighting circuit incorporated in the strobe board 31. The lighting circuit is a circuit in which a power battery 33, a lighting control switch 39, and a light bulb 38 are connected in series.
[0041]
Next, the above operation will be briefly described. In the state after the photographing is completed, as shown in FIG. 1D, the first contact piece 39a is lifted by the kicking arm 42a, and the lighting control switch 39 is in the first switching state in which it is electrically turned off. Yes.
[0042]
In the film winding operation, the winding knob 26 is rotated in the film winding direction. As a result, the unexposed photographic film 22 is pulled out from the film roll 22 a and transferred toward the aperture 19. With this film transfer, the sprocket 41 rotates and the shutter mechanism is charged.
[0043]
The kicking arm 42a is moved from the release completion position shown in FIG. 1D to the charging position shown in FIG. 1A by charging the shutter mechanism. At this time, the kicking arm 42a is retracted from the tip of the first contact piece 39a. However, since the shutter blade 40 is in the closed position at this time, the operating piece 40d is located immediately below the first contact piece 39a. Even if the kicking arm 42a is retracted due to the shutter charge, this time, Since the operating piece 40d holds the first contact piece 39a, the first switching state of the lighting control switch 39 is maintained.
[0044]
When the photographic film 22 is transferred by a length corresponding to one frame by the film winding operation, the film winding stop mechanism is activated to prevent the rotation of the sprocket 41 and the winding operation of the winding knob 26.
[0045]
The photographer selects a trimming type at the time of printing and performs a selection operation of the selection operation member 12 at a desired position before shooting. During flash photography, the flash charging button 36 is pressed to perform flash charging, and then the shutter button 28 is pressed to perform photography.
[0046]
When the shutter button 28 is pressed down to substantially the entire stroke, the rod bar 28a rotates the locking lever 43 toward the anti-winding position. Thereby, the holding of the shutter drive lever 42 is released, and the shutter drive lever 42 is instantaneously rotated from the charge position toward the release completion position. During this rotation, the kicking arm 42a kicks off one end 40a of the shutter blade 40 to swing the shutter blade 40 one turn.
[0047]
As shown in FIG. 1B, the shutter blade 40 rotates clockwise about the shaft 40b by kicking off one end 40a. Since the operating piece 40d is formed integrally with the shutter blade 40, the pressing of the operating piece 40d to the first contact piece 39a is released at the initial stage of this rotation. Thereby, the 1st contact piece 39a returns to an original position by own elasticity, and contacts the 2nd contact piece 39b. At this time, the lighting control switch 39 is turned on to switch to the second switching state. When the lighting control switch 39 is turned on, the light bulb 38 is turned on. During the opening and closing of the shutter blade 40, the contact between the first contact piece 39a and the second contact piece 39b is maintained, so that the second switching state is maintained and the lighting of the light bulb 38 is continued.
[0048]
When the shutter blade 40 fully opens the shutter opening 50, as shown in FIG. 1C, the synchro switch 34 is turned on and strobe light is emitted. Thereafter, the shutter blade 40 rotates counterclockwise about the shaft 40b by the urging of the return spring 51 and moves toward the closed position.
[0049]
As shown in FIG. 1 (D), before the shutter blade 40 returns to the closed position, the kicking arm 42a enters the lower side of the tip bending portion of the first contact piece 39a and presses it to The two contact pieces 39a are separated upward from the second contact piece 39b to switch the switch 39 to the first switching state. At this time, the lighting control switch 39 is turned OFF and the light bulb 38 is turned off. During this time, the light bulb 38 is turned on, and the light emitted from the light bulb 38 is imprinted on the lower side of the photographing frame 19a of the photographic film 22 through the openings and holes of the information switching plate 54 and the imprinting information plate 53. This recording is always recorded with an appropriate exposure because the lighting control switch 39 is interlocked with the opening / closing operation of the shutter blade 40 and the movement of the kicking arm 42a, and there is almost no time lag at the lighting start timing.
[0050]
When the shutter blade 40 returns to the closed position, the kicking arm 42a bends the first contact piece 39a. Since the movement of the shutter blade 40 toward the closed position is performed by the biasing force of the return spring 51, the momentum increases. However, in this example, the amount of bending of the first contact piece 39a due to the pressing of the kicking arm 42a is made larger than the bending force of the operating piece 40d when the shutter blade 40 is in the closed position, and the second contact piece 39a. Since the tip of the actuator is curved in a direction away from the moving area of the operating piece 40d, the amount of the operating piece 40d contacting the first contact piece 39a is small, and the impact at this time is applied to the tip bending portion of the first contact piece 39a. Since it can absorb, the inconvenience which makes the shutter blade 40 bounce again can be prevented reliably.
[0051]
In the above embodiment, in response to a signal obtained from the switch 39 for detecting the shutter opening / closing operation, the signal is used as a signal for controlling turning on and off of the light source for data copying. However, the present invention is not limited to this. Absent. For example, a mechanism for using these signals inside the camera includes a film feeding mechanism. In general, the film feeding mechanism does not feed a film while the shutter is opened and closed. Therefore, a signal at the shutter opening start end is detected, the movement of the film feeding mechanism is prohibited while this signal is being sent, and the prohibition of the film feeding mechanism is canceled by detecting a closing end signal. These signals can also be used with an inspection jig or the like. For example, these signals are used in an inspection jig for measuring the shutter opening / closing time. In this case, a contact for taking out these signals to the outside is exposed to the outside and provided in the camera. At the time of inspection, the effective exposure time of the shutter mechanism can be measured easily and accurately by taking out the signals of the opening start end and the closing end from outside through these contacts.
[0052]
In the above embodiment, the lighting control switch 39 is turned off by the kicking arm 42a constituting the shutter mechanism. However, it is not always necessary to press the kicking arm 42a, and the shutter blade 40 itself, for example, the operating piece 40d is used. The switch 39 may be turned off.
[0053]
Furthermore, although optical information is used as trimming information, the present invention is not limited to this, and information such as date, shooting information, and print may be used. When recording date information, it is imprinted on the shooting screen. In this case as well, the image may be taken from an optical path different from the photographing optical axis, and an imaging lens or the like may be used to clarify the outline. Furthermore, the optical information is copied from the front side of the photographic film. However, the present invention is not limited to this, and the optical information may be copied from the back side of the photographic film.
[0054]
In the above embodiment, the contact piece bent by the moving piece 40d and the kicking arm 42a is the upper first contact piece 39a described in FIG. 1, but the present invention is not limited to this, and the lower second contact piece 39b is not limited thereto. It is good. In this case, the tip is bent to the second contact piece 39b. In the above embodiment, the first switching state is turned off and the second switching state is turned on. However, the present invention is not limited to this, and the first switching state is turned on and the second switching state is turned on. May be turned off.
[0055]
【The invention's effect】
As described above, in the present invention, the elastically deformable first contact piece whose one end projects into the moving area of the operation piece provided on the shutter blade, and the second contact piece that performs switching operation with the first contact piece. If it consists of a pair of contact pieces, it can be achieved with an inexpensive and simple configuration, and space saving can also be achieved. The first contact piece is bent by the pressing of the operation piece when the shutter blade is in the closed position, and maintains the first switching state with respect to the second contact piece, and the operation piece moves by opening the shutter blade. When the pressure is released, the second contact piece is deformed to be switched to the second switching state, and the first contact piece is bent by the push of the kicking arm moved to the release completion position. Since the second switching state is switched to the first switching state, the shutter blade opening / closing operation is not adversely affected.
[0056]
According to the second aspect of the present invention, when the shutter blade returns to the closed position because the amount of bending of the first contact piece due to the pressing of the kicking arm is larger than the amount of bending when the shutter blade is in the closed position. In addition, the amount by which the operating piece presses the first contact piece can be reduced, and double exposure can be prevented. Furthermore, according to the invention described in claim 3, since the tip of the first contact piece is bent in a direction away from the moving path of the operation piece, the impact when the operation piece presses the first contact piece can be absorbed. And double exposure can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is an operation explanatory diagram of a lighting control switch that performs a switching operation in conjunction with an opening / closing operation of a shutter blade.
FIG. 2 is a perspective view showing an appearance of a lens-fitted photo film unit.
FIG. 3 is a perspective view showing a back surface of a lens-fitted photo film unit.
FIG. 4 is an exploded perspective view of a unit main body.
FIG. 5 is a perspective view showing an outline of a shutter mechanism, an optical information recording mechanism, and the like.
FIG. 6 is a timing chart showing the operation of each member from when the shutter button is pressed to when exposure is performed.
FIG. 7 is a circuit diagram showing a lighting circuit of a light source for data copying.
[Explanation of symbols]
22 Photo film
28 Shutter button
34 Synchro switch
34a First contact piece for synchro
34b Second contact piece for synchro
38 light bulb
39 Lighting control switch
39a First contact piece
39b Second contact piece
40 Shutter blade
40d working piece
42a Kicking arm

Claims (3)

In response to the shutter release operation, the kicking arm that moves from the charge position to the release completion position kicks the shutter blade in the closed position to open the shutter opening, and the return spring biases the shutter blade back to the closed position. In a shutter opening / closing operation detection device which is incorporated in a shutter device and obtains an operation signal of the shutter blade corresponding to the opening / closing operation of the shutter blade,
The first contact piece comprises an elastically deformable first contact piece projecting at one end in a moving area of an operating piece provided on the shutter blade, and a second contact piece that performs switching operation with the first contact piece. When the shutter blade is in the closed position, it is bent by the pressing of the operating piece to maintain the first switching state with respect to the second contact piece, and the operating piece is moved by releasing the shutter blade and the pressing is released. The second contact piece is deformed to be switched to the second switching state, and the first contact piece is bent by the pushing of the kicking arm moved to the release completion position. A shutter opening / closing operation detecting device, wherein the shutter opening / closing operation detecting device is switched to a first switching state. 2. The shutter opening / closing operation detecting device according to claim 1, wherein the amount of bending of the first contact piece due to the pressing of the kicking arm is larger than the amount of bending of the operating piece when the shutter blade is in the closed position. One end of the first contact piece is curved in a direction away from a moving range of the operating piece, and the shutter blade slides on the operating piece to absorb an impact when the shutter blade returns to the closed position. Item 3. The shutter opening / closing operation detecting device according to Item 2.

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