JPS638449B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-timer device for a camera, and particularly to a self-timer device having an interval timer function.

2. Description of the Related Art Conventionally, automatic film winding devices have been known that use the driving force of an electric motor to wind up the film of a camera, wind up a shutter mechanism, and the like. In such a known automatic winding device, the sequence of winding up → camera operation → winding up operation can be repeatedly performed,
It is also possible to adjust this repetition period.

However, since the repetition period (hereinafter referred to as interval time) is a short time interval,
Moreover, when various items are required for long periods of time, it is extremely difficult for known automatic winding devices to operate according to accurate interval times. Conventional automatic winding devices for interval time photography are equipped with a dedicated CR timer for interval time setting, as shown in Utility Model Publication No. 49-4337 and Utility Model Publication No. 50-37787. It is known that the timer starts the clock after the winding is completed, and after the timer elapses, the winding and then the release are performed sequentially. In such an interval timer device, an additional circuit is required on the automatic winding device side, especially since a dedicated timer circuit is provided separately. Furthermore, it is essential to consider the connection between the interval timer output on the automatic film winding device side and the release mechanism on the camera side, which inevitably results in a complicated configuration. Furthermore, since the above-mentioned timer is provided separately from the self-timer which is normally indispensable on the camera side, it is necessary to provide a safety device or the like to prevent the self-timer and the interval timer from operating at the same time.

As described above, the conventional interval timer device has the various drawbacks mentioned above, and in particular, when used with a camera equipped with a self-timer device, the conventional interval timer device has the disadvantage that its configuration is unavoidably complicated.

The object of the present invention is to solve these conventional drawbacks, and in particular, the present invention was made based on the new knowledge that a self-timer circuit provided on the camera side is used in combination as an interval timer circuit. It is something. The features of the present invention will become clear from the embodiments of the present invention described in detail below.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 are diagrams showing a combination of a camera and an electric drive device. First, Figures 1 and 2
A method of coupling the camera and the electric drive device and a method of coupling the electric drive device main body and the battery case will be explained with reference to the drawings. In FIGS. 1 and 2, 1 is a camera, and 2 is an electric drive device. This electric drive device 2 is composed of an electric drive device main body 3 and a battery case 4. 5 (Fig. 2) is a protective cover that closes the hole 6 on the bottom of the camera when the electric drive device is not in use. 7 is a storage space in which the protective lid 5 is stored when the electric drive device is used. Reference numeral 8 indicates a tripod screw hole of the camera, and reference numeral 9 indicates a mounting screw for the electric drive device, which is attached to the camera by turning the knob portion 9a by hand.
10 is a positioning hole for the camera, and 11 is a positioning pin for the electric drive device. Reference numeral 12 denotes an engagement hole of the electric drive device body, which engages with a convex portion 13 of the battery case. 1
4 is a concave groove that engages with the guide rail 15 of the battery case. Reference numeral 16 is an operating knob that can be slid in the direction of arrow a, and is biased in the direction opposite to arrow a by a spring (not shown).
7. 18 is a guide surface of the electric drive device body, and 19 is a guide surface of the battery case. _P1 , _P2
is a power supply terminal for connecting the power supply battery _B1 of the electric drive device to the main body of the electric drive device. 22 is a main switch of the electric drive device, which will be described later; 23 (first switch);
Figure) is the camera's checker button.

To connect the camera 1 configured as described above and the electric drive device 2, first, the protective cover 5 on the bottom of the camera is removed and stored in the storage space 7 of the electric drive device main body.

Next, the electric drive device is attached to the camera as shown in FIG. 4 by inserting the positioning pin 11 into the positioning hole 10 and screwing the mounting screw 9 into the tripod screw hole 8. Then the camera winding coupler 2
0 and the winding coupler 21 of the electric drive device are mechanically connected, and the camera side signal terminal described later
P ₃ and P ₅ are electrically connected to electric drive device side signal terminals P ₄ and P ₆ , respectively. Next, in order to attach the battery case 4 to the electric drive device main body 3, the guide surface 19 of the battery case is connected to the guide surface 18 of the electric drive device main body.
Slide the battery case 4 in the direction of arrow b while aligning the battery case 4 with the arrow b. As the battery case is slid in the direction of arrow b, the convex portion 13 of the battery case first enters the engagement hole 12 of the electric drive device body, and then the guide rail 15 of the battery case engages with the groove 14 of the electric drive device body. . After the engagement hole 12 and the convex portion 13 and the concave groove 14 and the guide rail 15 are engaged, when the battery case 4 is further slid in the direction of arrow b, the oblique side 16a of the operation knob 16 becomes the end of the electric drive device main body. 17, the operation knob 16 slides while moving in the direction of arrow a against a spring (not shown), and finally the operation knob 16 engages with the end 17 of the electric drive device main body, thereby removing the battery case 4. The installation of the electric drive device into the main body 3 of the electric drive device is completed (the state shown in FIG. 1).
Next, in order to remove the battery case 4 from the electric drive device main body 3, first press the lever part 1 of the operation knob 16.
By pushing 6c in the direction of arrow a with a finger, the engagement between the operation knob 16 and the end portion 17 of the electric drive device main body is released. Next, when the battery case 4 is slid in the direction opposite to the arrow b, the groove 14 of the electric drive device body first disengages from the guide rail 15 of the battery case, and then the engagement hole of the electric drive device body disengages. 12 and the convex portion 13 of the battery case can be disengaged from each other. When the battery case 4 is further slid in the direction opposite to the arrow b, the battery case 4 comes off in the direction of the arrow c due to the oblique side 19a of the guide surface 19 of the battery case and the oblique side 18a of the electric drive device main body. .

By performing the operations described above, the battery case 4 is removed from the electric drive device main body 3.

FIG. 3 is a block diagram schematically showing the circuit and main parts of the camera and electric drive device according to the present invention. Next, the operation of the camera and electric drive device according to the present invention will be explained with reference to FIG. First, the configuration will be explained with reference to FIG. The same members as in FIGS. 1 and 2 will be described with the same reference numerals. 1 is a camera body, and 2 is an electric drive device. Reference numerals 101 to 106 indicate the optical system of the single-lens reflex camera, where 101 is a photographing lens, 102 is an aperture, 103 is a mirror, 104 is a condenser lens, 105 is a pentaprism, and 106 is an eyepiece. SPD is a light receiving element placed in the eyepiece,
LED is a display means such as a light emitting diode for displaying the viewfinder, and is used to display shutter speed, shooting aperture, etc.
Displays whether or not automatic exposure shooting is being performed, as well as low-brightness warnings, etc.

107 to 113 indicate the main components of the focal plane shutter of a single-lens reflex camera;
07 is the shutter front curtain, 108 is the shutter rear curtain, 1
09 is an aperture portion, 110 is a spring for running the leading curtain, 111 is a spring for running the trailing curtain, 112 is a front curtain tensioning lever, and 113 is a trailing curtain tensioning lever.

Sw4 is a count switch for shutter seconds of the electronic shutter that is linked to the running of the front curtain, Sw5 is a switch that switches to the NC side when the film winding is completed, and switches to the NO side by the operation of the rear curtain brake after the rear curtain has run. Mg3 is an electromagnet for controlling the time.
114 is a release button on the camera body, Sw1 is a metering and display switch that is turned on with the first stroke of the release button 114, and Sw2 is an exposure control and shutter release switch that is turned on with the second stroke of the release button 114. be.
A circuit 115 includes a display circuit 116, a photometry circuit 117, and a shutter release circuit 118, and is connected to the power source _B2 of the camera body. Reference numeral 119 indicates a shutter speed information source that is manually set using the shutter dial 120 (see FIG. 1); 121
is a film sensitivity information source, and information from these information sources is input to the photometry circuit 117 together. 12
2 is a self-holding circuit 123 as a switch means;
123', a circuit including an exposure control circuit 124, a release mechanism drive circuit 125, and a shutter speed control circuit 126, and is connected to the power supply _B2 inside the camera body, and is also connected to the NC side of the above-mentioned switch Sw5. Ru. Therefore, the photometry circuit 117 and the display circuit 116 can be turned on at any phase of the camera by pressing the release button 114, but the exposure control circuit 124, the release mechanism drive circuit 125, and the shutter speed control circuit 126 can be turned on by pressing the release button 114. It is turned on only while Sw5 is switched to the NC side, that is, from the completion of film winding to the time when the trailing curtain runs. Mg1 is an electromagnet for automatic exposure control, and presets the aperture 102 to the aperture value determined by the exposure control circuit 124. Mg2 is a release electromagnet that controls driving of the aperture 102, raising of the mirror 103, and running of the front curtain 107.

127 to 129 are circuits within the electric drive device 2, 127 is a switching circuit, 128 is a delay circuit, and 129 is a brake circuit.

Reference numeral _B1 denotes a power source for the aforementioned electric drive device, and reference character M denotes a motor for carrying out winding operations such as shutter charging and film winding, and its ON/OFF state is controlled by a switching circuit 127. The LED ₄ is a light emitting diode for automatic stop indication, and is turned on when the motor is stopped by the delay circuit 128. Next, the operation of the circuit and essential components of the camera and electric drive device configured as shown in FIG. ). First, when the switch Sw1 is turned on by the first stroke of the release button 114 on the camera body side, the circuit 115 is turned on and each circuit section in the circuit 115 starts operating. That is, the photometric circuit 117 is a light receiving element.
Photometry is performed based on the subject brightness information output from the SPD, shutter speed information source 119, and film sensitivity information source 121, and the output at this time, that is,
Circuit 1 that displays information such as aperture value and shutter speed
Send to 16th. The display circuit 116 displays the aperture value, shutter speed, low brightness warning, etc. in the viewfinder using the display means LED based on the output from the photometry circuit 117. Next, the switch Sw2 is activated by the second stroke of the release button 114 on the camera body.
When the switch is turned on, the circuit 122 is turned on (at this time, the camera has completed the winding operation, so the shutter is charged, so the switch Sw
5 is switched to the NC side). In the circuit 122, first, the self-holding circuits 123 and 123' start operating, and even if the switch Sw2 is turned off due to the release of the release button 114, the self-holding circuits 123 and 123' remain in operation until the exposure is completed. This will keep circuit 122 on. At the same time, the exposure control circuit 124 starts operating and stores the appropriate aperture value determined by the photometry circuit 117. On the other hand, in synchronization with this, the release mechanism drive circuit 125 also starts operating, and by exciting the release electromagnet Mg2, the aperture 102 is activated by the automatic exposure control electromagnet.
After presetting the aperture value to the above-mentioned memorized aperture value using Mg1, actually closing down the aperture 102 using the release electromagnet Mg2, and further raising the mirror 103, the front curtain tensioning lever 112 is moved to its axis 1.
Turn the lever 1 clockwise around 12'.
12 to release the shutter front curtain 107 from locking.

As a result, the shutter front curtain 107 is acted upon by the spring 110 and moves in the direction opposite to the arrow A in the figure.
When the shutter leading curtain 107 starts running, the shutter seconds control circuit 126 starts counting the time in response to a signal from the shutter seconds count switch Sw4. Shutter speed information set in advance from the shutter speed information source 119 is input to the shutter speed control circuit 126, so it counts only a predetermined shutter speed, and when the count ends, it excites the electromagnet Mg3 for controlling the speed. do.
As the electromagnet Mg3 is energized, the trailing curtain tensioning lever 113 rotates clockwise around its shaft 113', and the shutter trailing curtain 108 moves in the opposite direction of arrow A by the spring 111, completing exposure. At the same time, the switch Sw5 is activated by the rear curtain brake (not shown).
is switched from the NC side to the NO side. Also, at this time, a signal indicating that the switch Sw5 is switched to the NO side is transmitted to the switching circuit 127 in the electric drive device 2, and as the switching circuit 127 is turned on, the signal is also transmitted to the delay circuit 128.
starts counting a predetermined time (at this time, the delay time set to 128 in the delay circuit needs to be somewhat longer than the time required for normal winding. In other words, for example, the time required for winding is
400ms to 700m depending on voltage fluctuation of power supply _B1 within
If it changes between about s, the delay circuit 128
It is necessary to set the delay time to about 1000ms). When the switching circuit 127 is turned on, the motor M starts rotating and moves the shutter leading curtain 107 and the shutter trailing curtain 108 in the direction of arrow A to charge the shutter and perform winding such as film winding. When the winding operation is completed, the switch Sw5 switches from the NO side to the NC side, and the switching circuit 127 is activated by this signal.
is turned off, and the motor M is de-energized and is braked by the brake circuit 129 to rapidly stop.

By repeating the above operations, the camera is electrically driven.

In addition, when the winding operation is performed normally, the delay time of the delay circuit 128 is set to be somewhat longer than the time required for winding, as described above, so the switching circuit 127 operates so that the switch Sw5 is
The motor M is turned off based on the signal when switching to the NC side, and the motor M is braked by the brake circuit 129 and stopped. In some cases, the winding is not completed even after the delay time set in the delay circuit 128 has elapsed, so the switch is turned off.
Sw5 is not switched to the NC side, so the switching circuit 127 remains on, and the motor M
At this time, the switching circuit 127 is turned off in response to the output signal from the delay circuit 128 after a predetermined time count, and the current to the motor M is cut off.

4 to 6 show specific examples of the main parts of the configuration diagram in FIG. 3, and FIG. 4 shows the shutter of the camera body, the mechanism of the film winding system, and the mechanism of the electric drive device. FIG. 5 is a circuit diagram of the camera body and the electric drive device, and FIG. 6 is a circuit diagram of the sequence control section and automatic exposure control section of the camera body. First, with reference to FIG. 4, the constructions of the mechanical parts of the shutter and film winding system of the camera body, and the mechanical parts of the electric drive device will be described. Note that the same members as in FIGS. 1 to 3 will be described with the same reference numerals. First, to explain the mechanical parts of the shutter and film winding system of the camera body, in Fig. 4, 201 and 202 are the upper and lower base plates, respectively, supported by pillars 204 and 205 made of die-cast aluminum or plastic. has been done.

In addition, the pillar 204 also serves as a battery box.
A battery corresponding to the power supply _B2 inside the camera body described in FIG. 3 can be stored between the upper and lower base plates.

The light shielding plate 203 is attached at the photographing aperture position, and is designed to restrict light coming from the lens system and to maintain the rigidity of the shutter unit housing formed by the base plate, pillars, etc. A shutter mechanism is attached to the upper and lower base plates, and appropriate cutouts are made as shown in the figure to accommodate the mirror box.

First, to explain the shutter mechanism, there are a leading curtain master gear 207 and a trailing curtain master gear 208 that rotate around a master shaft 206 provided on the upper base plate 201, and a leading curtain pinion 209 and a trailing curtain pinion that mesh with these. Pinion shafts 211 and 212 having shafts (not shown) are supported by the upper and lower base plates, and a leading spring drum 213
(corresponding to the spring 110 in FIG. 3) and the rear curtain spring drum 214 (corresponding to the spring 111 in FIG. 3) are similarly supported by the upper and lower base plates. Further, a leading curtain 107 and a trailing curtain 108 are stretched between the pinion shaft and the spring drum.

Next, to explain the shutter charge mechanism, a hoisting gear 2 is attached to the hoisting shaft in the hoisting mechanism, which will be described later.
15 is fixedly installed. The hoisting gear 215 is connected to the master shaft 20 via hoisting transmission gears 216 and 217.
6 is connected to the shutter hoisting gear 218 on the top.
The shutter winding gear 218 is provided with a sector-shaped 218a, and the sector-shaped 218a is formed through pins 207a and 207c planted on the leading curtain master gear 207 and a pin 208a planted on the trailing curtain master gear 208. First and second curtain master gear 207,2
08 are configured to rotate together. Reference numeral 219 denotes a trailing curtain tensioner, which is connected to the trailing curtain pinion shaft 212. Reference numeral 220 denotes a trailing curtain tensioning lever, which is rotatably coupled to the movable piece 222 of the electromagnet Mg3 for controlling the time, and whose position is restrained in the counterclockwise direction by a spring 223. The spring 221 is for charging the trailing curtain tensioning lever.

Next, the brake mechanism of the shutter will be explained. First, let me explain about the front curtain brake.
4 is a leading brake lever, and one end 224a of the brake lever 224 is connected to the leading master gear 2.
The brake lever 224 engages with a pin 207b implanted on the brake lever 224 just before the end of the front curtain run, and rotates the brake lever 224 around a brake shaft (not shown). At this time, the brake lever 224 is prevented from rotating by known means such as a spring or a skin (not shown) to apply a brake to the leading curtain. Also, the other end 22 of the leading brake lever
4b engages with the x-contact 225 for the strobe, and is configured so that the x-contact is turned on when the front curtain is running, the brake is applied, and the front curtain brake lever 224 is rotated clockwise.

Next, to explain the rear curtain brake, 226
is a rear curtain brake lever, and one end 226a of the brake lever 226 is connected to the rear curtain master gear 208.
It engages with the pin 208b implanted above just before the trailing curtain ends to rotate the brake lever 226 around a brake shaft (not shown). At this time, similarly to the leading curtain, the rotation of the brake lever 226 is prevented by known means such as a spring or skin (not shown) to apply a brake to the trailing curtain. 227 is a release lever whose position is regulated in the clockwise direction by a spring 228.
229 is a winding lever, one end 229a of which
is configured to engage with a groove 230a of a winding cam 230, which will be described later. A spring 231 is hung between the wind stop lever 229 and the release lever 227, and the two levers are configured to operate integrally. A pin 229c is installed in the extending portion 229b of the winding stopper lever 229. The pin 229c engages with a double-sided portion 233a of a contact lever 233 rotatably supported by a pin 232a on a fixed lever 232. The contact lever 233 is body grounded, and together with a printed board 234 constitutes a switch Sw5. That is, when winding is completed and one end 229a of the winding stop lever falls into the groove 230a of the winding cam, the winding stop lever 229 rotates clockwise.
The contact lever 233 rotates counterclockwise via the pin 229c to move the switch Sw5 from the NO side to the NC position.
Switch to the side. Next, the shutter release is performed, the trailing curtain runs, and when the trailing curtain brake is applied, the trailing curtain brake lever 226 rotates clockwise, and the wind stop lever 229 rotates counterclockwise via the release lever 227. Then, one end 229a of the winding lever
At the same time as releasing the engagement with the groove of the winding cam,
The contact lever 233 is rotated clockwise to switch the switch Sw5 from the NC side to the ON side. The NO side of the printed board 234 is electrically connected to the signal terminal P ₃ of the camera side connector 235.
Signal terminal _P5 is body grounded.

Next, I will explain the film winding mechanism.
236 is a winding shaft, and at its lower end there is a camera winding coupler 20 for winding the camera using an electric drive device.
will be permanently installed. At the top is a film winding gear 2 integrated with a cam 237a for charging the automatic aperture mechanism, mirror drive mechanism, automatic exposure control mechanism, etc.
37 is fixedly installed. The film winding gear 237
drives sprocket 242 and take-up spool 243 via gears 238, 239, 240, and 241. The winding shaft 236 further has the above-mentioned winding gear 215 fixedly installed at the upper part thereof, and the above-mentioned winding stopping cam 230 is fixedly installed at the top thereof. A one-way clutch 244 is installed inside the winding cam 230.
A manual winding lever 245 is fixed to the wind turbine 244a of the one-way clutch. The one-way clutch transmits the force of the winding lever to the winding shaft 236 when manual winding is performed using the winding lever 245, and transmits the force of the winding shaft 236 to the winding lever when winding is performed electrically using the winding coupler 20. It is configured so that it does not. 246
is the R button to freely rotate the sprocket.

Next, the configuration of the mechanism section of the electric drive device will be explained. M is a drive motor, and a bevel gear 247 is attached to its output shaft. The output of the motor M is transmitted to the winding gear 259 via the bevel gear 247 and gear trains 254 to 258 rotatably attached to shafts 249 to 253 embedded in the base plate 248.
transmitted to. Upper part 259a of winding gear 259
constitutes the outer periphery of the one-way clutch 260. The wind turbine 260a of the one-way clutch is fixed to the hoisting shaft 261 of the electric drive device, and the windmill 260a of the one-way clutch is
At the top of 1 is a winding coupler 21 of the electric drive device.
will be permanently installed. One-way clutch 260 is driven by motor M
When the motor rotates forward and winds up using its driving force, the driving force of the motor is transferred to the winding shaft 236 of the camera.
When manual winding is performed using the winding lever 245, the force of the winding shaft 236 of the camera is not transmitted to the gear trains 247, 254 to 259 and the motor M. Reference numeral 262 is an interlocking rod, which is used to press the R button 246 from the electric drive device side when the electric drive device is attached to the camera. 263 is a connector on the electric drive device side, and has signal terminals P ₄ and P ₆ described in FIG. 3.
The signal terminals P ₄ and P ₆ are the signal terminals P ₃ and P ₅ on the camera side.
electrically contact each other. 302 is a circuit within the electric drive device which will be described later.

Next, the circuit configurations of the camera body and the electric drive device will be explained with reference to FIGS. 5 and 6.
The same members as in FIGS. 1 to 4 will be described with the same reference numerals. In FIG. 5, 301 is a circuit within the camera body, 302 is a circuit within the electric drive device, and 303 is a circuit within the strobe device. First, let me explain the configuration of the circuit inside the camera body.
B ₂ is a power supply inside the camera body, and the negative side is grounded to the body. 304 is a sequence control and automatic exposure control unit. The details will be explained with reference to FIG. 305 is a photometry system, an arithmetic system, and a seconds control section. Light emitting diode connected to control unit 304
LED ₁ is connected between the positive side of power supply B ₂ and terminal P ₁₀₉ , and lights up when the camera is set to manual shooting. A light emitting diode LED ₂ is connected between the positive side of the power supply B ₂ and the terminal P ₁₀₈ to provide a low brightness warning. The LED ₁ and LED ₂ are installed so as to be displayed in the viewfinder (corresponding to the LEDs in FIG. 3). The light emitting diode LED ₃ is connected between the positive side of the power source B ₂ and the terminal P ₁₀₇ , and is turned on when taking a picture using the self-timer. Although not shown, it is arranged in front of the camera. A resistor R ₄ and an excitation capacitor C ₂ are connected in series between the positive side of the power supply B ₂ and the ground, and a release electromagnet Mg 2 and a noise prevention magnet are connected between the midpoint and the terminal P ₁₀₆ . diode _D1 is connected. Positive side and terminal of power supply B ₂
An electromagnet Mg1 for automatic exposure control is connected between _P104 . The power supply control transistor Tr ₁ has its emitter connected to the positive side of the power supply B ₂ and its collector connected to the terminal P ₁₁₇ . Further, its base is connected to a terminal _P114 via a resistor _R2 , and is grounded via a photometry and display switch Sw1. Terminal P ₁₁₆ is connected to the NC side of switch Sw5. The NO side of Sw5 is transmitted to the electric drive device side via the camera side signal terminal _P3 as described in FIG. Camera side signal terminal _P5 is grounded to the camera body. Switch Sw6 is an auto/manual changeover switch connected between terminal _P110 and ground, and switch Sw7 is a self-timer set switch connected between terminal _P113 and ground. Switch Sw2 is an exposure control and shutter release switch connected between terminal P ₁₁₅ and ground, and is turned on by the second stroke of the release button (see FIG. 3). Switch Sw connected in series with diode D ₄ between terminals P ₁₁₅ and P ₁₃₀
3 is a switch for bulb, which is used when shooting with bulb (when shutter dial 120 is set to bulb)
Turn on. Between terminal P ₁₃₂ and ground, there is a variable resistor VR ₅ for adjusting the high-speed shutter seconds, and a resistor for setting the seconds.
VR ₆ and time setting capacitor C ₅ are connected in series to produce the specified shutter time. VR ₆
is a variable resistance that changes by rotating the shutter dial 120. The midpoint between variable resistor VR ₆ and capacitor C ₅ is connected to terminal P ₁₃₀ , and
It is grounded via the shutter seconds count switch Sw4. The variable resistor VR ₁ connected between the terminal P ₁₀₃ and the ground is for determining the aperture value, which moves in conjunction with the aperture preset mechanism, but its structure is described in the previously filed Japanese Patent Application No. 1983-3252. (Tokukai Akira
50-98321), so it is omitted here.

VR ₃ is a variable resistor for inputting information such as shutter speed and film sensitivity, and is connected between terminal P ₁₂₂ and ground. VR ₄ is a variable resistor for inputting information such as aperture correction, and is connected between terminal P ₁₂₄ and ground. A time control electromagnet Mg3 is connected between the power source _B2 and the terminal _P127 . Me is a meter for displaying the aperture value in the viewfinder, and is connected between terminal P ₁₂₆ and ground. The switch Sw8 is a checker switch that is turned on by pressing the checker button 23 (shown in FIG. 1). resistance
R ₃₄ is the load resistance of the checker, and variable resistance VR ₇ is for adjustment. By turning on the checker switch Sw8, the meter Me connected in parallel with the load resistor _R34 is swung, and the voltage of the power supply battery _B2 is checked. The lines connected from terminals P ₁₁₁ and P ₁₃₄ to circuit 303 in the strobe device via terminals P ₇ and P ₈ automatically switch the shutter speed and aperture value for strobe by attaching the strobe to the camera body. This is the line for doing so. A line connected from terminal P ₁₃₅ to rotation 303 in the strobe device via terminals P ₉ and P ₁₀ is a line for setting a designated aperture.
Switch Sw9 is an X contact, 225 in Figure 4.
, and is connected to the circuit within the strobe device via terminals _P11 to _P14 .

Next, the circuit configuration inside the electric drive device will be explained. _B1 is a power source of the electric drive device, Sw10 is a main switch of the electric drive device, and M is a drive motor. LED ₄ is a light emitting diode for automatic stop indication, and its anode is connected to the positive side of power supply B ₁ via main switch Sw10, and its cathode is connected to the signal on the electric drive device side via resistors R ₁₀₁ and R ₁₀₂ . Connected to terminal P ₄ . Signal terminal P ₆ is connected to the negative side of power supply B ₁ . A resistor R ₁₀₃ and a capacitor C ₁₀₁ are an RC timer for determining the time constant of the delay circuit 128 in FIG. As mentioned in Figure 3,
The time of this timer is set to be longer than the hoisting time. RL ₁ is a relay coil and is connected in series with transistor Tr ₁₀₄ .

l ₁ is a contact of the relay, and when the relay coil RL ₁ is energized, that is, when the transistor Tr ₁₀₄ is turned on, it switches from the NC side to the NO side. capacitor
C ₁₀₂ and resistor R ₁₀₉ constitute a chattering prevention circuit of switch Sw5. That is, when switch Sw5 is turned on, transistor Tr ₁₀₄ is turned on via transistors Tr ₁₀₂ and Tr ₁₀₃ , and relay coil RL ₁ is turned on.
is turned on, but at that time capacitor C ₁₀₂ is also charged. Next, when the switch Sw5 turns off momentarily due to chattering, the transistor _Tr104 also turns off via the transistors _Tr102 and _Tr103 , but at this time, the relay coil _RL1 is kept in the on state by the charge of the capacitor _C102 . has been done. _D102 is a diode that allows the motor to reverse when the relay contact is on the NC side. capacitor
C ₁₀₃ and C ₁₀₄ are capacitors for removing noise from the motor M and relay coil RL ₁ .

FIG. 6 is a diagram showing an internal circuit of the sequence control and automatic exposure control section 304 in FIG. 5.
The circuit configuration of the sequence control and automatic exposure control section will be explained with reference to FIG. 401 to 4
20 constitutes a binary counter, P is its reset input terminal, and when P="1", the output of the counter is reset, that is, Qn="1",
It is configured so that Qn="0". OSC is a CR oscillator that oscillates at an oscillation period determined by resistor R ₃ and capacitor C ₃ . A digital timer circuit is composed of binary counters 401 to 420 and a CR oscillator OSC. A to G constitute a binary counter, P is its reset input terminal, and when P = "1", the output of the counter is reset, that is, Qn = "1", n =
It is configured to be “0”. 501 to 521
are NAND gates, and 601 to 613 are inverters, which are connected as shown. 701 constitutes a power up clear circuit, and 702 constitutes a one shot circuit. 703 to 705 constitute flip-flop circuits, and 706 constitutes an AD converter.

The operation of the specific embodiment of the present invention constructed as described above and shown in FIGS. 4 to 6 will be explained with reference to the timing charts shown in FIGS. 7 and 8. Here, it is assumed that both the camera body and the electric drive device have been completely wound up. First, when the camera's release button 114 (shown in Figure 1) is pressed down with a finger, the first stroke turns on the metering and display switch Sw1 shown in Figure 5 (Figures 7 and 8), and the resistor R ₂ to turn on _{transistor Tr 1 .}

When Tr ₁ turns on from off, power E ₁ is supplied to the circuit and the circuit starts operating. The oscillator OSC shown in FIG. 6 also starts oscillating at a period determined by R ₃ and C ₃ and transmits the clock to the counter. When E ₁ is supplied to the circuit, the power up clear circuit 701 causes the output of the circuit 701 to become "0" momentarily.
Then, the counters 401 to 420 are reset via the NAND gate 509, and the flip-flop circuit 703 is also set to the initial state E ₂ =“1”.

Next, ₂ = “0” signal and 401 to 420
The flip-flop circuit 704 is also set to the initial state E ₃ =“1” by the reset signal.

Further, the flip-flop 705 is also set to the initial state E ₄ =“1” by the signal E ₃ =“1”.

Also, due to the signal E ₂ = “1”, that is, ₂ = “0”,
The A to G counters that make up the AD converter are also reset. In addition, the output of operational amplifier AR ₄ is controlled by the signal of E ₂ = "1", and its output potential is set to GND (ground potential), and the automatic exposure control electromagnet Mg1 is turned on only by turning on the switch Sw1. It is set not to be energized.

Now, if the shooting mode is set to manual shooting, the auto/manual switching switch Sw6 is turned on, so the output of the inverter 612 becomes "1", and the gate of the NAND gate 516 becomes "1".
becomes “1”.

Also, since E ₂ = “1”, ₁₃ = “1” and ₁₄ =
LED ₁ lights up only when it becomes “1”. As a result, LED ₁ will blink at a fixed period, indicating that it is being used manually in the viewfinder. When the shooting mode is auto shooting (shooting using automatic exposure control), Sw6 is off, so LED ₁ remains off. SPD cell output that receives the subject light through the photographic lens when the subject brightness is too low
Since V△ _AV becomes V△ _AV < V _c (V _c is the reference voltage), the output of comparator CP ₂ becomes “1”, and E ₂ =
Since it is “1”, LED ₂ lights up only when Q ₁₃ = “1” and Q ₁₄ = “1”. This causes LED ₂ to light up at regular intervals, displaying a low-brightness warning in the viewfinder, and indicating that the aperture value that provides the correct exposure cannot be obtained for the set shutter speed. In this case, the shutter time is readjusted (corresponding to the display circuit 116 in FIG. 3).

When the release button is further depressed, switch Sw2 is turned on with the second stroke.

Switch Sw2 causes the output of inverter 602 to become "1".

Further, since the NC side of the switch Sw5 is already turned on, the output of the inverter 601 is "1".

Next, the voltage obtained by dividing the voltage of E ₁ by R ₁₀ and R ₁₁ is compared with the constant voltage Vc, and when the voltage of E ₁ is higher than the usable voltage, the output of comparator CP ₇ becomes 1. As a result, all the inputs of the NAND gate 507 become "1", and therefore the output of the NAND gate 507 becomes "0", inverting the flip-flop circuit 703 and changing _E2 from "1" to "0". E ₂ is “0”
When this happens, one of the NAND gates 515 and 516 becomes "0", turning off LED ₁ and LED ₂ .
Furthermore, as E ₂ becomes "0", the output of the inverter 603 becomes "0", and the transistor Tr ₁
transistor Tr ₁ continues to be on even if Sw1 and Sw2 are turned off (the third
(corresponds to the self-holding circuits 123, 123' in the figure).
Also, as _E2 changes from "1" to "0", the output of the inverter 604 changes from "0" to "1", and the output of the one-shot circuit 702, that is, the delay time caused by the inverters 605 to 607. Then, the output of the NAND gate 508 becomes "0". As a result, the output of the NAND gate 509 becomes "1" momentarily, and the counters 401 to 420 are reset again and start counting.

Also, by changing E ₂ from “1” to “0”,
Operational amplifier AR ₄ is uncontrolled and the output of AR ₄ is released from ground. This allows the output of operational amplifier AR ₄ to be transmitted to the input terminal of comparator CP ₁ . Since the counters A _to G are in a reset state until E2 becomes "0", a high potential is output from the resistor network LADDER at the time _E2 becomes "0". Therefore, the output of the operational amplifier _AR4 at this point is at a high potential, and when _E2 becomes "0", the comparator _CP1 is inverted and becomes "0".
is output, and the automatic exposure control electromagnet Mg1 starts to be energized. Also, the comparator CP ₃ also has an operational amplifier.
CP ₃ is “1” because high potential from AR ₄ is applied
Output.

In the above state, if the shooting mode is set to manual shooting, the auto/manual switching switch Sw6 is on, so the NAND gate 521
The output of counter A~ remains “1” and
G maintains a reset state. On the other hand, if the shooting mode is set to auto shooting, the switch
Sw6 is off, the output of the NAND gate 521 changes from "1" to "0", the reset state is released, and the counters A to G change to the NAND gate 520.
Counting starts based on the clock signal output from (synchronized with ₁ output). This will open the
The output of AR ₄ steps down and the comparator
When the voltage on the inverting input side of CP ₃ becomes equal to V△ _AV ,
CP ₃ is inverted and outputs “0” to NAND gate 5
20 outputs "1" regardless of ₁ , the counting operations of counters A to G are stopped, and digital values corresponding to voltage _VΔAV are stored in counters A to G. The voltage V△ _AV at this time is the output of the aperture value calculated from the photometry value, shutter time, film sensitivity, etc. in the photometry system, calculation system, and time control section 305, so counters A to G store the aperture value. That means you did it. Note that the comparator _CP3 is controlled by the clock output from the NAND gate 520 so as not to be affected by noise when the counters A to G count.

If the shooting mode is currently set to self-timer shooting, the self-timer set switch
Since Sw7 is on, the output of the inverter 608 is "1". Therefore, when both ₁₈ and ₂₀ become "1", the output of the NAND gate 510 changes from "1" to "0". As a result, the output of the NAND gate 512 changes from "0" to "1" and the inverter 613
The output of E3 is changed from "1" to "0" to invert the state of the flip-flop circuit 704, and the output _E3 is changed to "1".
to “0”.

As a result, the output of NAND gate 513 becomes "0" and the output of NAND gate 509 becomes "1".
, and resets the counters 401 to 420 again. When the counter is reset, the output of NAND gate 510 becomes "1", the output of NAND gate 512 becomes "0", the output of NAND gate 509 becomes "0", and counting restarts.

Also, when switch Sw7 is on, the light emitting diode LED ₃ is turned on only when both ₁₄ and ₁₅ become "1".
lights up to indicate that it is in self-timer mode, and when the self-timer ends, that is, _E3 is “0”.
When this happens, LED ₃ turns off.

If the shooting mode is not currently set to self-timer shooting, self-timer set switch Sw7 is off, so inverter 608
The output of the inverter 609 is "1", so when ₈ , ₉ , and ₁₀ all become "1", the output of the NAND gate 511 changes from "1" to "0".
become. In other words, as shown in Figure 8, when shooting in self-timer mode (when switch Sw7 is on), after the time determined by ₁₈ and ₂₀ (approx.
(after 10 seconds), or if shooting is not performed in self-timer mode as shown in Figure 7 (switch Sw
7 off), _E3 changes from “1” to “0” after the time determined by ₈ , ₉ , and ₁₀ (approximately 10ms later).
become. In other words, in the normal shooting mode, shooting will occur almost simultaneously with the second press of the release button (switch Sw2 is on and the electromagnet is turned on).
The time between Mg2 energization is offset from the photometric storage operation. ). E ₃ goes from “1” to “0”
When this happens, the output ₃ of the inverter 611 becomes “0”
becomes “1” and NAND gate 518 becomes “0”
Therefore, the release electromagnet Mg2 is excited. The excitation of electromagnet Mg2 is such that both ₇ and ₉ are “1”
It can be continued until When both ₇ and ₉ become “1”, the output of NAND gate 514 becomes “0”
, the release electromagnet Mg2 is turned off, the flip-flop circuit 705 is inverted, and E ₄
from “1” to “0”, NAND gate 509
Set the output of ``1'' to counters 401 to 4.
20 in the preset state. Further, the second control electromagnet Mg3 is brought into an excited state by a signal that excites the release electromagnet Mg2.

When the release electromagnet Mg2 is excited, the third
As outlined in the figure, the preset aperture lever is driven, and the variable resistor VR ₁ (shown in Figures 5 and 6) fixed to the preset aperture lever changes, and compared to the output of AR ₄ . When the appropriate aperture value is reached, comparator _CP1 is inverted, automatic exposure control electromagnet Mg1 is turned off, and the aperture is clamped. In other words, the voltage level on the inverting input side of comparator CP ₁ changes depending on the resistance value of variable resistor VR ₁ that changes, and this voltage level and reference voltage Vc
When the aperture value becomes a value corresponding to the calculated aperture value, the comparator CP ₁ inverts and outputs "1" to stop the aperture operation. or,
Mirror up and automatic aperture are performed by the release electromagnet Mg2. The mechanism and operation of this automatic exposure control section are described in detail in the previously filed application numbered above, and are not directly related to the present invention, so a description thereof will be omitted here.
When mirror up and automatic aperture are performed, a release signal from the mirror automatic aperture mechanism releases the front curtain tensioning lever (not shown) (corresponding to 112 in FIG. 3), and the upper front curtain master gear 20 in FIG.
7. The pinion 209 and shaft 211 rotate, and the shutter front curtain 107 starts running. At the same time,
Shutter seconds count switch Sw4 is turned off by operating the front curtain tension lever. When the leading shutter curtain 107 is about to end its travel, one end 224a of the leading shutter brake lever 224 engages with the pin 207b on the leading master gear 207, applying a brake to the leading shutter curtain to stop it. At this time, the leading brake lever 224 turns clockwise to turn on the X contact 225.

When the shutter seconds count switch _Sw4 is turned off, as shown in _FIG .
When charging _begins and the voltage reaches the preset voltage, the photometry system, calculation system, and time control unit 305
The circuit inside operates to turn off the time control electromagnet Mg3. When the second time control electromagnet Mg3 is turned off,
In FIG. 4, the movable piece 222 of the electromagnet Mg3 is rotated counterclockwise by the spring 223, and the engagement between the trailing curtain tensioning lever 220 and the trailing curtain tensioning lever 219 is released. When the engagement of the trailing curtain tensioner 219 is released, the trailing curtain pinion shaft 212 integrated with the trailing curtain tensioner 219 and the trailing curtain master gear 20 are connected via the trailing curtain pinion 210.
8 is rotated by the rear curtain spring drum 214,
The shutter trailing curtain 108 is run to complete exposure. When the shutter trailing curtain 108 is about to end its travel, one end 226a of the trailing curtain brake lever 226
engages with the pin 208b on the trailing curtain master gear 208, applying a brake to the shutter trailing curtain to stop it. At this time, the rear curtain brake lever 226 is rotated clockwise by the force of the shutter rear curtain, and the release lever 226 is rotated clockwise.
7 has one end pushed by the brake lever 226, so it rotates counterclockwise against the spring 228. Now, assuming that no unnecessary force is applied to the winding shaft 236 from an electric drive device or the like, the notch 230a of the winding cam 230 and the winding lever 229
Since no unnecessary frictional force is applied to the one end 229a, when the release lever 227 rotates counterclockwise, the winding stop lever 229 also rotates counterclockwise via the spring 231. . If extra force is applied to the winding shaft 236, the release lever 227 will rotate counterclockwise due to the frictional force between the notch 230a of the winding stop cam 230 and one end 229a of the winding stop lever 229. However, the winding lever 229 cannot be rotated, and only the spring 231 is charged. When the extra force applied to the winding shaft 236 is released, the spring 231 is charged according to the reaction force of the overload, which will be described later.
The spring force causes the winding stop lever 229 to rotate counterclockwise. When the winding stop lever 229 rotates counterclockwise, its one end 229a comes off the groove 230a of the winding stop cam 230, releasing the winding stop and releasing the pin 229c implanted in the extending portion 229b. also rotates counterclockwise, and the fixed lever 23
The contact lever, which is pivotally supported by the second pin 232a, rotates clockwise because its two-sided part 233a is engaged with the pin 229c of the winding lever, and the switch is turned off.
Switch Sw5 from NC side to NO side.

When the switch Sw5 is switched from the NC side to the NO side, the output of the inverter 601 becomes "0" in FIG. 6, and the state of the flip-flop circuit 703 is reversed, changing _E2 from "0" to "1". Make it. As a result, the output of the inverter 603 also changes from "0" to "1", releasing the holding state of the transistor _Tr1 . However, if switches Sw1 and Sw2 are kept on, transistor _Tr1 will continue to be held even if switch Sw5 switches from the NC side to the NO side.
When E ₂ changes from “1” to “0”, the flip-flop circuit 704 also inverts, changing E ₃ from “0” to “1”.
When _E3 changes from "0" to "1", the flip-flop circuit 705 is also inverted, _E4 also changes from "0" to "1", and the output of the NAND gate 509 changes from "1" to "0". Starts the counter again, resets all conditions (and therefore the memory circuit), lights up LED ₁ again if in manual shooting mode, and lights LED ₂ again in case of low brightness warning. Display by lighting up.

When switch Sw5 switches from NC side to NO side,
In FIG. 5, in the circuit 302 in the electric drive device, the potential at point B decreases via terminals P ₃ to P ₆ , and the potential at point C also decreases. Since the current flowing through the resistor R ₁₀₃ charges the capacitor C ₁₀₁ , no current flows through the resistor R ₁₀₄ and the transistor Tr ₁₀₂ is turned off. resistance
Current flows through R ₁₀₅ to the base of transistor Tr ₁₀₃ , transistor Tr ₁₀₃ is turned on, and transistor Tr ₁₀₄ , resistor R ₁₀₈ , and transistor
Current flows through Tr ₁₀₃ and resistor R ₁₁₀ , transistor Tr ₁₀₄ is turned on, and current flows through relay coil RL ₁ . Capacitor C ₁₀₂ and resistor R ₁₀₉ smooth the current flowing through relay coil RL ₁ and prevent the relay from chattering. When current flows through relay coil _RL1 , relay switch _l1 switches from the NC side to the NO side, current flows to the motor M, and the motor M rotates. The rotation of the motor M is caused by the gear train 24 in FIG.
7,254-259, one-way clutch 260;
It is transmitted to the camera side winding coupler 20 via the winding shaft 261 and the winding coupler 21. When the winding coupler 20, which is integral with the winding shaft 236 of the camera, rotates, the sprocket 242 and spool 243 rotate through a gear 237 and gear trains 238 to 241, which are also integral with the winding shaft, to wind the film. Also, the cam 23 integrated with the gear 237
7a charges the automatic exposure control mechanism, automatic aperture mechanism, mirror up mechanism, etc. (not shown). By the rotation of the winding shaft 236, the winding shaft 23
6 also rotates, and the master shaft 206 is connected to the master shaft 206 via the winding transmission gears 216 and 217
The upper shutter hoisting gear rotates. Hoisting gear 2
18 is provided with a sector-shaped 218a, which rotates the first and second master gears together through pins 207c and 207a on the first master gear 207 and a pin 208a on the second master gear 208. Therefore, the front and rear pinion shafts 211, 212 also rotate, so the shutter curtains 107, 108 are wound up toward the pinion shafts, and the springs in the spring drums 213, 214 are charged.

When the leading master gear 207 rotates to a position where it is locked by a tension lever (not shown), the trailing blade tension 219 coupled to the trailing pinion shaft 212 is also locked by the tension lever 220. Be in position. At this time, one end 221a of the charge spring 221 is already connected to the hoisting cam 237a.
Since the movable piece 222 is being charged to the upper left in FIG. be done. When the shutter charging is completed, the teeth of the winding transmission gear 216 are disengaged by the notch of the winding gear 215, so that the shutter winding gear 218 along with the transmission gears 216, 217 is returned to its pre-winding position by the spring 264. After the shutter charge is completed, if the motor M continues to wind the film, the winding of the film is completed and all winding operations are completed. When all the winding operations are completed, the winding shaft 23
6, the groove 230a of the winding stop cam 230, which was rotating together with the winding stopper cam 230, reaches a position where it engages with one end 229a of the winding stop lever 229, so the winding stop lever 229 is moved counterclockwise by the spring 228 via the release lever 227. one end 22 of the winding lever 229.
9a falls into the groove 230a of the winding stop cam 230 (the trailing curtain brake lever 226 is rotated counterclockwise by the trailing master gear 208 being charged at the beginning of winding, and the release lever is restrained. is cut off). At the same time, as the winding stopper lever rotates clockwise, the pin 229c installed in the extending portion 229b also rotates clockwise, and the two-hatted portion 233a rotates around the pin 229c.
The contact lever engaged with rotates counterclockwise to switch switch Sw5 from the NO side to the NC side.

When the switch Sw5 is switched from the NO side to the NC side, the circuit 30 in the electric drive device in FIG.
2 is open between signal terminals P ₄ and P ₆ , so B
The potential at the point increases, transistor Tr ₁₀₄ and resistor
Since the current flowing through R ₁₀₈ , transistor Tr ₁₀₃ and resistor R ₁₁₀ disappears, transistor Tr ₁₀₄
is in the off state. However, when the transistor Tr ₁₀₄ turns off, the relay coil RL ₁ turns off the capacitor
The charge of C ₁₀₂ flows through the resistor R ₁₀₉ , and the relay coil RL ₁ connects to the capacitor after the transistor Tr ₁₀₄ is turned off (that is, after the switch Sw5 switches to the NC side).
C ₁₀₂ turns off after a period of time determined by resistor R ₁₀₉ (approximately 8 ms later).

Here, the time determined by capacitor C ₁₀₂ and resistor R ₁₀₉ is about several ms, and switch Sw5
Even if the timing at which the switch switches from the NO side to the NC side and the timing at which the winding of each mechanical part is completed differs due to variations in component accuracy, etc., the motor M will ensure that each mechanical part will be hoisted to completion. This is a delay time for guarantee. When the relay coil _RL1 is turned off, the relay switch _L1 switches from the NO side to the NC side, and the back electromotive force of the motor M flows through the diode _D102 , causing the motor M to stop suddenly.
When the motor M suddenly stops, the gear train 24 shown in FIG.
7,254 to 259 also stop, but if the voltage of the power supply _B1 of the electric drive device is high, the winding shaft 261 is rotated beyond a predetermined angle due to the inertial force of the gear train, and the winding shaft of the camera is rotated. 236 will be overloaded. This overload is caused by the winding shaft 236
Due to the torsional reaction force, the gear trains 247, 254 to ₂₅₉ and the motor M are rotated in the opposite direction to the direction in which they were hoisted. Since the brake is not applied, the overload can be completely relieved.

Also, if the release button 114 is kept pressed at the time when the switch Sw5 is switched from the NO side to the NC side, the circuit 301 inside the camera body shown in Figs. 5 and 6 will switch the switch Sw5 from the NO side to the NC side. As a result, the output of the inverter 601 becomes "1". At this time, switches Sw1 and Sw2 are on, so
Power supply E ₁ is supplied and inverter 602
Since the output of the flip-flop circuit 703 has already become "1", the state of the flip-flop circuit 703 is reversed and the camera starts again in the same manner as the first release described above. Then, counters A to G memorize the appropriate aperture value, and after switch Sw5 switches to the NC side, counters 401 to 420 change to ₈ ,
After counting the time determined in _{steps 9} and ₁₀ (approximately 10 m
s), or after the time determined by ₁₈ and ₂₀ (approximately 10 seconds) if the self-timer is set.
After that, the shutter is released using the release electromagnet. Therefore, in the case of normal photography, the release is performed approximately at the same time as the energization of the motor ends, which is suitable for continuous winding. After the appropriate aperture value is determined, the front shutter curtain moves to start exposure. After a preset shutter time, the rear shutter curtain runs. When the rear shutter curtain has finished running, switch Sw5 is activated again from the NC side.
Switches to the NO side, motor M starts rotating, and the second
Start the second winding. As long as the release button is held down, the shutter release and winding operations are repeated and continuous shooting is performed.

Here, we will explain in particular the operation of the flip-flop circuit 70 when the release button is held down and the self-timer time is used as the interval timer time.
3,704,705 will be explained starting from the time when the film is wound after shooting.

Before the film winding is completed, the switch Sw5
Since it is switched to the NO side, the inverter 601 outputs "0", the flip-flop circuit 703 is set, _E2 becomes "1" ( _E2 becomes "0"), the flip-flop circuit 704 is also set, and When _E3 becomes "1", flip-flop circuit 705 is also set. Then, when the film winding is completed, switch Sw5 is set to NC.
When switching to the side, the inverter 601 becomes “1”.
In addition, in this state, the NAND gate 507
Since the output of E2 becomes "0", the flip-flop circuit 703 is reset and sets _E2 to "0".
Note that the output of the inverter 602 as the input terminal of the NAND gate 507 becomes "1" because the switch Sw2 continues to be on, and since all three input terminals become "1", this NAND gate 507 will output "0".

Then, as the flip-flop circuit 703 is reset, the output of the inverter 604 becomes "1", and the one-shot circuit 702 outputs "0" for a short period of time, which corresponds to the "0" output time from the NAND gate 509. “1” output is output and the counters 401 to 42
0 is reset and counting starts thereafter.

Then, to set the self mode, turn on the switch.
Since Sw7 is on and the output 7 of the inverter 608 is "1", the output of the NAND gate 510 (outputs ₁₈ and ₂₀ from the counters 401 to 420 are supplied to the input terminal) changes from "1" to "1" after 10 seconds. 0", and the output of the NAND gate 512 changes from "0" to "1". This nand gate 51
As the output of E2 becomes "1", the output of inverter 613 becomes "0", and flip-flop circuit 704 is reset, setting _E3 to "0". As a result, all the input terminals of the NAND gate 513 become "1", the output becomes "0", the output of the NAND gate 509 becomes "1", and the counters 401 to 420 are reset.
By resetting the counters 401 to 420, _Q1 to _Q20 all become "0", so at this timing (approximately 10 seconds after winding is completed), the output of the NAND gate 514 becomes "1", and the output of the NAND gate 518 becomes "1". becomes "0" (because all the input terminals become "0"), the release electromagnet Mg2 that controls the start of exposure is energized. On the other hand, since counters ₁ to ₂₀ of counters 401 to 420 are "0", the output of NAND gate 510 is "0".
to “1”, the output of NAND gate 512 changes from “1” to “0”, and the output of NAND gate 513 changes from “0” to “1”, so the output of NAND gate 509 changes from “1” to “0”. , the reset is released, and the counters 401 to 420 start measuring time. And “1” for both ₇ and ₉
Since the output of the NAND gate 514 becomes "0" at the timing of , the output of the NAND gate 518 becomes "1" and the energization to the release electromagnet Mg2 is stopped. Furthermore, when the output of the NAND gate 514 becomes "0", the flip-flop circuit 705 is reset, and when _E4 becomes "0", the output of the NAND gate 509 becomes "1".
The counters 401-420 are then reset again.

Then, when the shutter release is completed and the switch Sw5 is switched to the NO side, the flip-flop circuits 703, 704, and 705 are set, and the operations are repeated thereafter.

When all the film has been shot, the shutter release is completed and switch Sw5 is released from the NC side.
Switched to the NO side, the film cannot be unwound even if the motor M rotates, and therefore the switch Sw5
remains switched to the NO side. In this state, as shown in FIG.
Since the potential at point B of is low, the transistors Tr ₁₀₄ and
Current continues to flow through the resistor _R108 , the transistor _Tr103 , and the resistor _R10 , and the motor M becomes locked. At this time, capacitor _C101 continues to be charged through the resistor, and the potential at point C gradually rises until the set time (as described in Figure 3, longer than the winding time) after switch Sw5 is switched to the NO side. After a long period of time has passed, the transistor Tr ₁₀₂ turns on. Then, the voltage between the base and emitter of transistor Tr ₁₀₃ becomes low, so the transistor
Tr ₁₀₃ is turned off and the base current of transistor Tr ₁₀₄ stops flowing, so transistor Tr ₁₀₄ is turned off. and resistor R ₁₀₉ , capacitor
After the time determined by C ₁₀₂ (after approximately several ms), the relay coil
Even if the winding cannot be completed completely within the time determined by the resistor R ₁₀₃ and the capacitor C ₁₀₁ after lowering RL ₁ , the light emitting diode will
LED ₄ lights up to indicate that the power supply voltage has dropped.

As described above, in the present invention, when continuous shooting is performed with the camera set to self-timer mode, the shutter is released after the self-timer setting time has elapsed after winding is completed, so the self-timer is set at an interval. Needless to say, it can be used as a timer to take pictures once every 10 seconds as in the embodiment.

As described above, in the above embodiment, the delay time at the time of winding completion caused by the chattering prevention circuit resistance R ₁₀₉ and capacitor C ₁₀₂ in FIG. Not only does this ensure that there is no variation in the timing of the winding of the mechanism, but it also rotates the motor M extra for the delay time even after winding is complete, thereby placing an excessive load on the camera winding shaft 236 shown in Figure 4. Due to the excessive load, the motor M is reversed as described above, and the reverse force completely removes the excessive load on the winding shaft 236, thereby turning off the winding stopper and turning off the switch.
_l1 is switched from the b side to the a side, and the motor M is no longer energized and the locked state is released. On the other hand, when the point B of the light emitting diode LED ₄ is connected to the negative side of the power supply B ₁ (i.e., the switch Sw5 is on the NO side) and the transistor Tr ₁₀₁ is in the off state (i.e., when the transistor Tr ₁₀₄ is in the off state), A current flows through the light emitting diode LED ₄ , the resistor R ₁₀₁ , and the resistor R ₁₀₂ to emit light, but even if the point B is connected to the negative side of the power supply B ₁ , the transistor Tr ₁₀₁ is in the on state.
The potential difference between point E and point D is only about 0.1V, which is the voltage drop of transistor Tr ₃ , and the applied voltage does not exceed about 1.4V, which is necessary for light-emitting diode LED ₄ to light up, so light-emitting diode LED ₄ does not light up. . In other words, switch Sw5 switches to the NO side and the transistor
Tr ₁₀₄ and Tr ₁₀₁ are turned on, the film is not wound even if the motor M is energized, and after a time determined by the resistor R ₁₀₃ and capacitor C ₁₀₁ , the transistors Tr ₁₀₄ and Tr ₁₀₁ are turned off and the motor is no longer energized. When the light emitting diode is turned off, the light emitting diode LED ₄ lights up, so that it can be known that the entire film has been shot. In addition, the voltage of the power source _B1 of the electric drive device becomes low due to battery exhaustion, etc., and the output of the motor M completely removes the unnecessary frictional force between the notch 230a of the winding cam and one end 229a of the winding lever. It also works. This prevents the following inconveniences from occurring. That is, if an excessive load is not applied to the winding shaft 236 to allow the motor M to reverse rotation, the motor M and the gear trains 247, 254 to 25
Since the inherent frictional force of 9 remains applied to the winding shaft 236, the notch 230 of the winding cam
A and one end 229a of the winding lever remain in a state where unnecessary frictional force is applied, and the spring 23
This prevents the occurrence of a phenomenon in which the wind stopper lever 229 cannot be released with the force of 1 and therefore the next winding cannot be performed because the switch Sw5 is not switched even if the trailing curtain runs and the shutter release is completed. are doing.

As shown in the above-described embodiment, the counters 401 to 420 for forming the self-timer time are used as a self-timer by turning on the switch Sw7, and at the same time, the counters are turned on when the switch Sw7 is turned on after shooting.
As long as the release button is pressed, self-timer photography is performed again, and the self-time time at this time becomes the interval time.

Therefore, as long as the release button is pressed, the automatic film winding device will wind the film and take pictures using the time measured by the self-timer as the interval time.

As described above, in the present invention, the digital timer provided on the camera side to form the self-timer time is configured to be set to the initial value when winding is completed after each shooting, so that when the release button is pressed. As long as the self-timer is in use, the film is wound by the automatic winding device, and the digital timer starts timing each time, and interval time photography is performed at the predetermined self-timer time. Also, if the release button is pressed temporarily, normal self-timer photography is performed. Therefore, since the self-timer timing circuit on the camera side is used in conjunction with the interval timer without providing any additional timing circuit or safety mechanism, the configuration is simple and effective for cameras, especially small cameras. be.

[Brief explanation of the drawing]

FIG. 1 is an overall system configuration diagram of an automatic camera winding device to which the present invention is applied and a camera equipped with the device. FIG. 2 is a perspective view of the components shown in the first diagram separated from each other. FIG. 3 is an electric circuit block diagram applied to the system shown in the first diagram. FIG. 4 is a configuration diagram of the main parts of the mechanism of the first illustrated system. FIG. 5 is a partially detailed diagram of the electric circuit on the hoisting device side of the third illustrated block diagram.
FIG. 6 is a specific electrical circuit diagram of the camera-side control circuit in the third illustrated block diagram. FIG. 7 is an explanatory diagram of the operating state showing continuous shooting in the normal shooting mode. FIG. 8 is an explanatory diagram of the operating state showing interval photography in the self-timer photography mode. M: Winding motor, C ₁₀₁ , R ₁₀₉ : Capacitor and resistor forming the time constant circuit for the delay circuit,
D ₁₀₂ : Diode connected to motor M short circuit, RL: Motor control relay, 401-42
0: Binary counter, OSC: Oscillator, Sw
7: Self-timer, normal shooting switch,
Mg2: Release electromagnet, 501-518: NAND circuit.

Claims (1)

[Scope of Claims] 1. A digital camera that generates a first exposure start signal for normal photography after a first time or a second exposure start signal for self-timer photography after a second time longer than the first time. a timer; a signal generation circuit that generates a winding completion signal when the film winding mechanism completes winding one frame; and a release switch operation signal that operates in response to the winding completion signal and the operation of a release button. A starting circuit that resets the digital timer and starts timing based on the logical product of both signals; and a startup circuit that selects the first exposure start signal from the digital timer during normal shooting and is linked to the self-timer shooting operation. a selection circuit that selects the second exposure start signal from the digital timer; and a selection circuit that selects the second exposure start signal from the digital timer; 1. A self-timer device for a camera, wherein the digital timer is configured to actuate the activation circuit again in response to an occurrence of the digital timer, and to use the digital timer also as an interval timer that defines a time interval between each photographing.