JPS6015047B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an electromagnetic start-up method in which a camera is started by an electromagnetic release, and in particular, the start-up operation of an electromagnetic release camera that starts supplying power to a side light circuit by release operation is ensured. This invention relates to an electromagnetic starting method using a starting delay means to achieve this.

In an electrically controlled automatic exposure camera, voltage is initially applied to the side light circuit when the shutter button is pressed, etc. to perform side light and photographic calculations, and the shooting information of the calculation results is displayed in the viewfinder. A camera has already been proposed in which the trigger switch is used as a reference for the photographer's decision, and then, near the end of pressing the release button, a trigger switch is actuated to generate a shutter release signal to the electromagnetic release device, thereby triggering the camera's shooting operation. It is put into practical use.

By using such a configuration in a camera, it is possible to construct a small and lightweight camera that reduces consumption of the built-in battery due to sequential operation that can extremely reduce power consumption required for photographing. The method that has been adopted in many cameras is to place a switching member at a suitable location on the camera exterior and move it with the power switch. If you forget to turn it off, power is continuously supplied to the electric circuit during the period when the camera is not in use, resulting in a large amount of consumption of the power supply battery and significantly shortening the life of the battery. Furthermore, the power switch must be opened and closed every time photography is paused, making the operation cumbersome and impeding the photographer's intention to create an image, which is inconvenient. As a way to avoid the above-mentioned drawbacks, the above-mentioned camera starts supplying power to the optical circuit and other components at the beginning of pressing the shutter release, and consumes no power during the camera's rest period when the release button is not pressed. has been proposed and put into practical use. In a camera equipped with this type of electromagnetic activation device, the problem of wasted power consumption due to forgetting to turn off the switch as described above can be overcome, but the following problems inevitably arise due to the structure of the camera based on this system. {1' Since the first switch and the second switch are opened sequentially in conjunction with the pressing of the shutter button, the time from when the first switch is turned on until the second switch is turned on depends on the operating speed of the shutter button. It changes depending on.

Proper exposure will be obtained if the time from the first switch being turned on to the second switch being turned on is short compared to the time from when voltage is applied to the leakage optical circuit by turning on the first switch until the circuit stabilizes. things become difficult. This phenomenon tends to occur particularly when the subject is under low illumination. '2'
When using a motor drive device or a remote control device with the camera, if the side light is not always operated with a certain time difference, incorrect exposure will occur due to the delayed response of the optical circuit as described above. The circuit configuration becomes complicated.

'3' In order to avoid incorrect exposure due to response delay of the side optical circuit, a certain amount of delay means is provided to cover the delay at low illuminance where the response delay is particularly large. As the timing shift relative to the photo opportunity increases, the number of frames taken per second during continuous shooting using the motor drive decreases, making it impossible to perform high-speed continuous shooting.

The time from the start of power supply to the neck 9 optical circuit described above until the circuit reaches a stable state mainly depends on the light receiving element (SPC).
This is due to the stray capacitance of the logarithmic compression element and the transient rise time of the amplifier.

It is also caused by a time delay due to the time constant of the low-pass wave transmitter used to eliminate fluctuations in the dimming output due to flicker of the light source illuminating the subject due to the long light response speed of the light receiving element (SPC). . The present invention was proposed in view of the above-mentioned problems, and its configuration is based on a release system.
The side light circuit is supplied with power by the side light signal formed by the first operation of the lens operating member, and the electromagnetic release means is activated by the release signal formed by the subsequent second operation of the lens operating member. In the camera that starts the shooting operation,
a first time signal forming means that starts a time measurement operation by the first operation of the above-mentioned series operating member and generates an output after a predetermined time period; a second timekeeping signal forming means for generating a timekeeping power; and a second timekeeping signal forming means detecting the output of the spotlight circuit to select the first timekeeping signal forming means when the brightness is higher than a predetermined brightness level, and select the first timekeeping signal forming means when the brightness is lower than the brightness level. a selection circuit that selects the second timing signal forming means; an output from the timing signal forming means selected by the selection circuit; and a release signal formed by the second operation of the release operating member. and a permitting means for permitting activation of the electromagnetic lead means by AND.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a circuit connection diagram showing an embodiment of the neck 9 optical circuit of an electromagnetically activated camera according to the present invention. In the figure SP
C is a light-receiving element, and a silicon photocell or the like having a far light response characteristic is used. A5 is an operational amplifier having a logarithmic transistor (diode connection) Trll in its feedback path, and compresses and amplifies the voltage of the SPC connected between its input terminals. A4 is an operational amplifier having a transistor Tr12 having the same characteristics as the compression transistor Trl in its feedback path, and acts as a temperature compensation circuit. (Fig. 1 corresponds to the L block in Fig. 2, and information input is performed by the subsequent amplifier (Fig. 2, A2).) Note that RT is an overflow sensitive resistor element, which is connected to the light receiving element. It has a temperature compensation effect. A6 is an operational amplifier that has a parallel connection of a resistor RI and a capacitor CII in its feedback path, and acts as a low-pass filter.
Blocks high frequency components of stored optical output. C12 connected by a dotted line between the inverting input terminal of A5 and the ground is a capacitor representing stray capacitance, which is inevitably generated in the manufacturing process of circuit elements. Next, the operation of the circuit shown in FIG. 1 will be explained.

Generally, the operational amplifier used in the circuit shown in the figure requires a high input impedance, so the input stage is composed of a field effect transistor (FET), and the output stage is composed of a bipolar transistor. In general, bipolar transistors have better transient response characteristics than FETs, so when power is applied to an operational amplifier, the bipolar transistor becomes active before the FET stage, and the FET stage becomes active somewhat later. Become. That is, in the circuit shown in FIG. 1, when the power supply EI is applied to the circuit with the power switch (not shown) closed, the output stage (bipolar) is activated before the input stage (FET) of the operational amplifier A5 is activated at the initial stage. Therefore, feedback is performed through the feedback path Trll, and an abnormal charge occurs in the stray capacitance C12 of the input circuit. After that, when the input stage FET becomes operational, the inverting input side of amplifier A5 is at a higher potential than the non-inverting input side, so the output stage of A5 changes to the OFF state, and the output voltage of A5 goes to the lower saturation level (“0”). Become. In this state, both the transistor Trll and the photoelectric element SPC are connected to CI2.
Since the charge of C12 is reversely connected to the charge of Trll and SPC, the charge of C12 cannot be discharged through these Trll and SPC, but is discharged by the photocurrent generated by SPC. Therefore, it takes time to discharge the abnormal charge of CI2, and the photocurrent is small especially when the amount of light incident on the SPC is small, that is, when there is side light from a low-brightness subject, so the discharge time of CI2 cannot be ignored. become. The output voltage of the operational amplifier A5 fluctuates in response to changes in the characteristics of the compression transistor Trll due to temperature.

In order to compensate for this change in output voltage, the output of an operational amplifier A4 having a temperature compensation transistor Tr12 having the same characteristics as the compression transistor Trll in its feedback path is applied to the non-inverting input terminal of A5. Furthermore, in order to compensate for fluctuations in photocurrent due to temperature of the photoelectric element SPC, a temperature sensitive resistance element RT having a positive temperature coefficient is connected in series to the output circuit of A5, and these compensate for output fluctuations due to temperature changes in the spotlight circuit. ing. Since the light-receiving element in the circuit of FIG. 1 uses a photoelectric element SPC with far different photoresponse characteristics, the side light output changes in response to a sudden change in the amount of received light.

Therefore, if a flickering light source such as a crab lamp is used as a light source for illuminating the subject, changes in the amount of light received due to the flickering will be mixed into the output of the A5 as flicker noise, which is inconvenient. In order to eliminate this, a resistor pass filter consisting of an operational amplifier A6 having a resistor RII and a capacitor CII connected in parallel is provided in the feedback path. The AC component contained in the output of A5 is cut off by appropriately setting the time constant of the circuit consisting of the resistor RII and capacitor CII in the feedback path.
A daughter with no frizz noise to the output of 6. It is designed to provide light output. However, since the A6 operational amplifier has delay characteristics as a low-pass filter, there will be a time delay with respect to the rise of the A5 output, and a means is required to prevent camera malfunctions due to this time delay. becomes. The camera of the present invention is equipped with a circuit that compensates for output fluctuations due to time delays and temperature changes as described above.

FIG. 2 is a connection diagram showing the circuit configuration of an embodiment of the camera according to the present invention. In the figure, block A is a delay circuit, which includes a comparator CP1 and an inverter 110 that compare the input signal VBVO from the side optical circuit with the reference voltage VC.
It is composed of NAND gates GI8 and GI9 as a first clock signal forming means and a second clock signal forming means, and delays the release signal according to the response time based on the value of the signal VBVO of the side optical circuit. Block B is a self-timer setting circuit block and sets the self-timer when switch SW3 is turned on. The circuit is inverter 111
, NAND gates G21 and G22. The D block is a delay circuit that delays the time from the completion of winding to the stabilization of the film surface. R5 and C5 are the resistors and capacitors of the delay time circuit, and CP2 is a comparator. The battery check circuit block includes a comparator CP3 that compares the power supply voltage EI with the reference voltage Vc, and when the power supply voltage is sufficiently high, the output of CP3 becomes "H" level. J is a constant current circuit for controlling the power supply control transistor Trl. K is a sequence control counter block, OSC is a clock pulse oscillator, R is a reset terminal, and QI to Q13 are outputs from each counter. M is a delay circuit with inverters 112, 1 13,
114 and a NAND gate G23, the signal from the NOR gate G6 is delayed by the inversion time of the inverter, outputted from the NAND gate G23, and inputted to the reset terminal of the counter K via the NAND gate G5. FFI is a flip-flop that latches the spotlight completion signal from block A, and FF2 is a flip-flop that latches the winding completion signal from block D, the power supply voltage signal from block date, and the signal from release switch SW2 via NAND gate GI. It is. When both FFI and FF2 are set, NOR gate G6 sends an output "1" to the delay circuit block M in the subsequent stage, and inverter 112,
Output “1” via 113, 114 and 12 to NAN
Inform D Gate G2. When the outputs from 12 and self-timer block B are both "1", NAND gate G2 transmits an output "0" to flip-flop FF3.
Latch with . NAND gate G3 becomes “0” when both the output of FF3 and the QI output of counter K are “1”.
is output and flip-flop FF4 is set. G4
NAN for driving magnet Mg2 for Hashiries
At the D gate, flip-flop FF3 outputs "1", FF4 outputs "0", and inverter 115 outputs "1".
When is being output, the output of G4 becomes “0” and R3
The release operation is performed by flowing the charge of the capacitor C2 through the magnet Mg2. G5 is N
When this output is ``1'' in the AND gate, a reset signal is input to the counter K. Among the switches, SW
I is the leakage light switch, SW2 is the leakage switch, S
W3 is a self-timer switch, SW6 is a power switch, and SW5 is a winding completion switch.SW5 is turned off when winding is completed.Trl is a power supply control transistor.P is a block that generates a side light start pulse; When Trl is turned on at the start of light, charging of the capacitor CI starts, and during the time when the potential reaches a fixed value, Tr5,
Tr4 is turned on sequentially, first Tr5 is turned on and Tr4 is turned off, and after a certain period of time, Tr5 is turned off and Tr4 is turned on to generate a pulse signal and transmit it to NAND gate G5 and FF1 and FF2. Note that a terminal m is provided in parallel with the release switch SW2, and a signal from a remote control device is inputted to this terminal m. Next, W is a block for a side light, calculation, memory display, and constant voltage circuit, L is a side light circuit including a light receiving element (not shown), and AI and A2 are operational amplifiers and variable resistors RT.
Photographic information such as shutter speed, film sensitivity, and lens curvature correction is set in v, RSv, and RAvc, respectively, and photographic calculations are performed.

Note that Rfl and Rf2 are feedback resistors. ME is a storage circuit that stores the calculation result produced at the output of operational amplifier A2.
That is, the ME outputs the aperture stage number information ΔAv, this and the open F value information set in RAvo are calculated by the display operational amplifier A3, and the aperture value is displayed by the meter MT connected to its output. . × is the aperture control circuit, which calculates the side light and outputs the output △Av from the circuit to the comparator CP.
3, compare it with the signal R△Av from the aperture interlocking resistor, and when they match, the output signal from CP3 activates the aperture control magnet Mg.
1 to determine the aperture value. Y is an extension and second control circuit which controls the shutter second control magnet Mg3 and closes the shutter in response to a signal from the second buffer amplifier AI. In addition, the electric charge of capacitor C2, which is charged by resistor R2 in order to cause a pulse current to flow through Mg3, is Mg3.
It is designed to discharge electricity. SW4 is a second count switch and is turned off when the first track starts running. The comparator CPI and the inverter 110 constitute a selection circuit that selects the first and second time signal forming means, and the NOR gate G6 selects the output of the time signal forming means selected by the selection circuit and the release operation member. The release signal (second signal of the switch SW2) formed by the second stage operation constitutes a permitting means for permitting the operation of the magnet Mg2 as an electromagnetic release means. FIG. 3 is an exploded perspective view showing the structure of the main parts of the mechanism in one embodiment of the camera according to the present invention, and shows the completed state of winding.

In the figure, 301 is an aperture ring, and this aperture ring 30
1 is engraved with an automatic aperture AE index and a manual aperture index. Reference numeral 302 is an index for matching the automatic narrowing A financial limit with the manual narrowing index.

Reference numeral 303 denotes an aperture preset ring, which is biased clockwise by a spring 303a, and the protruding portion 301a of the aperture ring 301.
It has a protrusion 303b that can be engaged with.

Further, the aperture preset ring 303 is provided with an arm 303c, and the aperture preset ring 303 determines the amount of rotation of the bell crank via an aperture setting cam ring (not shown) using a lever 303d provided with a hammer.
This bell crank controls the rotation of an aperture drive ring (not shown) and determines the opening degree of the aperture. Reference numeral 304 denotes a pin inserted into the aperture drive ring, and the end of this pin 304 engages with an automatic aperture lever 305 which is biased to rotate counterclockwise by a spring 305a.

This automatic aperture lever 305 has a rising portion 305c. Further, an intermediate lever 307 is pivotally attached to the automatic aperture lever 305 on the same shaft 306, independently of the automatic aperture lever 305. 308 is a winding shaft of a winding lever (not shown), and a winding cam 309 is fixed to the end surface of this winding shaft 308.

310 is a rotatable intermediate lever, and this intermediate lever 31
The pin 310a provided at one end of the hoisting cam 309
is engaged in.

Further, a pin 310b is provided at the other end of the intermediate lever 310, and this pin 310b engages with one end of the intermediate lever 307 and one end 311a of the mirror drive lever 311. Also, a pin 310c provided on the intermediate lever 310 charges the first tensioning lever 313. At the other end of this intermediate lever 307 is a pin 312 provided at one end of a rotatable charge lever 312.
can be engaged with a. This charge lever 312
is rotated counterclockwise by a spring 312d. Mg2 is an electromagnet with a first tensioning permanent magnet, which engages with one end 313a of the first tensioning lever 313, and a pin 313b provided at the other end engages with one end 314a of the release lever 314. This lever 313 has a spring 313c
is rotated clockwise. Also, lever 31
0 rotates clockwise, the pin 310c
The lever 313 is rotated counterclockwise by one end 313d of the lever 313 against the spring 313c. A pin 314b is provided at one end of the release lever 314.
The other end 315a, which has one end 315b of the mirror drive engagement lever 315 engaged with one side 311c of the mirror drive lever 311, is locked to this pin 314b. One end of a rotatable AE locking bar 316 is locked to the end 314d of the release lever 314. Further, the release lever 314 is urged to rotate clockwise by a spring 314f. Further, the spring 314f is a weaker spring than the spring 313c. 318
is an AE sector gear, and this sector gear 318 is locked to the end of the locking bar 316.

This sector gear 318 includes gears 319a and 319b forming a speed regulating mechanism 319 and a stop wheel 319c.
are meshing.

Further, a slider 318b of a variable resistance RΔav is attached to the sector gear 318 for determining an aperture preset value. The shaft 318a of this sector gear 318 has a gear 3.
20 is attached, and the AE charge gear 321 meshes with this gear 32.

A lever 327 is fixed coaxially with this gear 321', and this lever 327 is attached to the end portion 3 of the charge lever 312.
12e. A pin 318d is installed in the sector gear 318, and the end surface of the pin 318d is fixed to a signal lever 329 that is pivotally connected to a support lever 328. The bent end of the signal lever 329 locks the arm 303c of the aperture preset ring 303.
The AE sector gear 318 is strongly urged to rotate clockwise by the spring 303a relative to a spring 318c on the sector gear 318 which is urged to rotate in all directions. Mg1 is a diaphragm control magnet, and when this magnet Mg1 is not energized, no attraction force is applied to it. In addition, the magnet Mg2 and the magnet Mg3 described below are magnets with permanent magnets, and when energized, the magnetic force acts in the opposite direction to the magnetic force of the permanent magnet, resulting in a state where there is no attractive force as a whole. It is. Therefore, when the magnet Mg1 is not energized, the magnet Mg1 is biased by the spring 350a.
G It is designed to be locked from the jaw retainer bar 3501. This suction lever 330 is rotated counterclockwise by a spring 331a, and one bent end of the lever 330 is connected to the stop wheel 319c of the telescopic mechanism 319.
can be engaged with. Further, the other end of the suction lever 330 is in contact with the other end stepped portion 312f of the charge lever 312. The mirror drive lever 311 has a delay device (not shown), and the mirror drive lever 311 is rotated counterclockwise by a spring 311d, and one end of the mirror drive lever 311 is connected to the mirror drive engagement lever 315. Ikebata 315
b, and is arranged at a position where the other end can be engaged with one end of the leading curtain tensioning lever 333.

The front end tensioning lever 333 is urged to rotate counterclockwise by a spring 333a, and its tip engages with a shield pin 334a of the front curtain gear 334. Also, the grave gear 334
There is a pin 334b provided on the top, which is engaged with the count start switch SW4. This leading blind gear 334 meshes with a leading curtain pinioso 335 of a leading curtain drum (not shown). Also, the kinty portion 3 of the mirror drive lever 311
A mirror tensioning lever 336 is engaged with 11b. This fixed lever 336 is rotated counterclockwise by a spring 336a stretched between the mirror drive levers 311, and one end engages with a push-up lever 337 coaxially supported on the mirror drive lever 311. ing. One end 337a of the push-up lever 337 is configured to be rotated clockwise by a mirror-up operation from the outside (not shown), and can independently raise the mirror. The other part of this push-up lever 337 locks a flip-up pin 338a provided on a mirror 338. This mirror 338 is rotatable around a mirror shaft 338. 338c is a mirror return spring.

Reference numeral 339 denotes a rear curtain gear coaxially provided separately from the front curtain gear 334, and this rear curtain gear 339 meshes with a rear curtain pinion 339' for the rear drum (not shown).

Further, a pin 339a is provided on the rear curtain gear 339. 34 is an adsorption bar rotated by the pin 339a, and the adsorption lever 340 is adapted to be adsorbed by the iron piece 340a to the magnet Mg3 with a permanent magnet for shutter control.

This suction lever 34 is always rotated and held by the magnet Mg3 by a spring 340b. 34
1 is a rear signal lever rotated by the pin 339a, and this lever 341 is always rotated and held at the position of the locking pin 341b by a spring 341a.

The trailing curtain signal lever 341 is engaged with an end 336b of the mirror tensioning lever 336. Reference numeral 347 is a shirt button 347, and the first stroke of this shirt button 347 turns on the side light switch SWI, and the second stroke turns on the side light switch SW2.

351 is an ASA dial, and Rsv is a variable resistor for inputting a film sensitivity value.

Next, the operation of the camera according to the present invention will be explained with reference to FIGS. 2 and 3.

First, when the power switch SW6 is turned on and winding is completed, the switch SW5 is turned off and the resistor R5 of block D is turned off.
The capacitor C5 is charged through the capacitor C5, and after a certain period of time, the output of the comparator CP2 becomes high level (logic “1”).
). Next, a release button 34 as an operating member
When the switch 7 is pushed down to the first stage and the first stroke operation is performed, the double 9 light switch SW1 (first switch) is turned on, transitioning from the first state (off) to the second state (on) and controlling the power supply. Transistor Trl becomes conductive and power supply to the circuit begins. At the same time, the transistor Tr5 of the block P is turned on, and the output of the transistor Tr5 becomes low level (logic "0"). This "0" is input to the NANO gate G5, which outputs "1" and the counter of block K is reset. Furthermore, due to the "0" output from Tr5, "0" is input to one input of the NAND gates GII and GI2 of the flip-flops FFI and FF2, and the flip-flops FFI and FF2 are reset. By resetting the flipflop FF2, the NAND gate GI
2 becomes "1", and "0" is inputted to flip-flops FF3 and FF4 via the inverter 13, so that flip-flops FF3 and FF4 are reset. Then capacitor C connected to the collector of Trl
When the potential of I rises, the transistor Tr of block P
4 turns on, thereby turning off the transistor Tr5, the NAND gate G5 outputs "0", and the block K starts counting clocks from the pulse generator OSC. In this state, EI is supplied from the power supply to the circuit of the block W, and the side light circuit L outputs a signal Bvo corresponding to the subject brightness based on a signal from a light receiving element (not shown).

Here, Bvo is a signal expressed as Bvo=Bv-Avo-Avc, where Bv is the abex value of brightness, Avo is the open F-number information of the lens, and Avc is the closed-open F-number curvature correction information. This Bvo, Tv information set to the shutter speed setting resistor RTv, Sv information set to the film sensitivity setting resistor Rsv, and Avc information set to the aperture F value curvature correction setting resistor RAvc are input to the operational amplifier A2 and calculated. Ru. That is, the luminance information B based on avex display
v and photographing information Tv, Sv, Avoc are calculated, and the output of A2 is the number of aperture steps from the open F value △Av = Av - Avo
is output. This △Av is △AvkoAv-Avo=(
Bv-Avo-Avc) 10Sv1Tv+Avo.

Bv-Avo-Avc in the above formula is Bvo, and T
This is the output signal of the light receiving element on the TL side. Amplifier A2
The output of is stored in the memory circuit Mold. The time it takes for the output of the spotlight circuit L to stabilize varies depending on the amount of light incident on the light receiving element.

The L output VBvo of the W block is input to the comparator CPI of the A block and compared with the reference voltage. At this time, when the amount of incident light is small, the output of the CPI becomes "0". As a result, "0" is input to the NAND gate G18, and its output remains unchanged at "1", and the NAND gate GI9, which receives "1" through the inverter 110, outputs Q6 after the counter K starts counting. When becomes “1”, “0” is output, which causes flip-flop FF
I is set. Also, when the amount of light incident on the light receiving element is large, the output of the comparator CPI becomes "1", and as a result, "0" is input to the NAND gate GI9, and its output becomes "1", and the output is sent to the NAND gate G18. teeth"
1" is input, so Q4 after the counter K starts counting.
When the output becomes "1", the output of NAND gate G18 becomes "0" and the flip-flop FFI is set.In other words, when the incident light to the light receiving element is dark, after the counter is reset, from the start of counting until the output of Q6 is output. The setting of FFI is delayed by the time of
The setting of I will be delayed. After the counter K is reset by turning on the power supply control transistor Trl, the clock pulses are counted and the Q4 output becomes "1".
” and the time until the Q6 output becomes “1” are selected as the times when the side light output is stable, so you can obtain a long delay time when shooting a dark subject, and when shooting a bright subject. Then, the second stroke of the release button 347 moves the release switch SW2 from the first state (off) to the second state (on).

When SW2 is turned on, the output of the inverter 11 becomes "1", and "1" is applied to one input of the WAND gate GI. In this state, when the winding is completed and a predetermined time has elapsed since the switch SW5 is turned off, "1" is output from the comparator CP2 and input to the NAND gate GI. Furthermore, when the power supply voltage is within the operating range of the device, "1" is output from the block date, and when the release switch SW2 is turned on in this state, "0" is output from the NAND gate GI. This sets flip-flop FF2. When flip-flop FF2 is set, release switch SW2
Even if the constant current source J is turned off, the constant current source J
Since the conduction state of the power supply control transistor Trl is maintained through the power supply control transistor Trl, the power supply to the circuit is stopped. The above is the operation of the circuit by operating the Lease button. If the Lease button is pressed down at a normal operating speed, there will be enough time from when the leak light switch SWI is turned on until when the Lease switch SW2 is turned on. Due to time constraints, the side light switch SW
After I is turned on, flip-flop FFI is set through the above process, and then FF2 is set by turning on switch SW2, so NOR gate G6 is set.
outputs "1" in response to turning on the switch SW2. However, if the release button is pressed down suddenly, the release switch SW2 will be turned on immediately after the side light switch SWI is turned on, and the release switch SW2 will be turned on immediately after the side light switch SWI is turned on.
2 is turned on, flip-flop FF2 is set first, and after a predetermined time determined depending on the brightness of the subject, flip-flop FFI is set, and at this time, NOR
"1" will be output from gate G6.

In other words, if the release button is pressed down at normal speed, the NOR
If the gate G6 is opened and the shutter release button is pressed down rapidly, the NOR gate G6 will be opened after the side light circuit has stabilized (varies depending on the subject brightness), and the operation speed of the shutter release button will be reduced. Normal sequential operation can always be performed regardless of the situation. Also, when a remote control device is used with the camera, the side light switch SWI is not used, and the signal is input from the remote terminal m to the remote control device, replacing the light switch SW2. After a predetermined period of time has elapsed after the power supply control transistor Trl is turned on and the spotlight circuit is in a stable state, the NOR gate G6 is opened.

When NOR gate G6 outputs “1”, N of block M
The output of AND gate G23 momentarily becomes “0” and NA
Counter K is reset again via ND gate G5.

Thereafter, when the signal delayed through inverters 112, 113, and 114 inputs "0" to NAND gate G23, the output of G23 returns from "0" to "1" and counter K starts counting again. Further, the output "0" of the inverter 114 is inputted as "1" to the NAND gate G2 via the inverter 12. If the self-timer is not used at this time, SW3 is off, so the N of block B
“0” is input to one side of AND gate G22, and NA
"0" is input to one side of the ND gate G21, "1" is output from G21, and the output of G22 becomes "1". Therefore, the NAND gate G2 responds to the output "1" of 12 and outputs "1". 0” is output. When the self-timer is used, the switch SW3 is turned on, so "1" is input to the NAND gate G21 via the inverter 111, and the output is turned on. The output of TSKU B becomes "0" and the output of NAND gate G2 becomes "1", but when Q13 of counter K outputs "1" after the self-timer time elapses, the output of NAND gate G21 becomes "1". 0” and NAND gate G22
The output becomes “1” and the output is “0” from NAND gate G2.
' is output from NAND gate G2.
When '0' is output, the output of NAND gate G5 is '1'.
”, the counter K is reset for the third time, and at the same time flip-flop FF3 is set and the output “1” of FF3 is transmitted to the memory circuit ME of the side light block W, and the aperture stage number information ΔAv after calculation is M is stored in old memory.
Furthermore, when the output "1" of flip-flop FF3 is input to the NAND gate G4, the output of G4 becomes "0" in response to the output "1" of FF3, and the charge in the capacitor C2 that was charged through the resistor R3 is removed. Release magnet M
Flows to g2. As described above, after the leakage light switch SWI and the release IJ switch SW2 are turned on in sequence by pressing the release button 347, the release magnet Mg is turned on.
2 is activated and the first kinty of the Lease operation is released. That is, when current flows through the release magnet Mg2, the first Kinty lever 313 shown in the third figure is unlocked, and the first tension lever 313 is rotated clockwise by the spring 313c. That is, the pin 313b of the first tension lever 313
One end 314a of the spring lever 314 is connected to the spring 31.
4f, the release lever 314 is rotated counterclockwise. As a result, the mirror drive engagement lever 315 is rotated by the pin 314b, details of which will be described later.

Further, the release lever 314 is locked by rotating in the direction of the rebound indicator, and the bar 316 is rotated in the direction of the rebound indicator and the sector gear 3 is locked.
18, and the holding lever 350 is moved to the left together with the release lever 314. Also, since the rotation of the sector gear 318 is signaled via the pin 318d and moves the van 329 downward, this signal lever Arm 303 to 329
The aperture preset ring 303 that stopped c is the spring 30
3a against the spring 318c, the sector gear 318
Rotate clockwise. Therefore, the gears 319a, 319b, and 319c forming the speed regulating mechanism 319 rotate, and the stop wheel at the final stage is rotated counterclockwise. Furthermore, the rotation of the sector gear 318 moves the slider 318b of the variable resistance RΔAv. This resistance value is compared with the output ΔAv of the memory circuit M old in FIG.
Release the iron piece 331.

Therefore, the suction lever 330 is rotated in the direction of the rebound meter by the spring 331a, and its bent portion is rotated by the stop wheel 319c.
The rotation of the stop wheel 319c is stopped. Therefore, the position of sector gear 318 is determined. Therefore,
As described above, when the sector gear 318 stops rotating, the aperture preset ring 303 is rotated to the position of the appropriate aperture value, thereby determining the position of the bell crank. In other words, the stop position of the aperture preset ring 303 is the aperture value determined by the information from the light receiving element PD that sidelights through the photographic lens, the set various information, the evening speed, and the film sensitivity exposure correction information. It is something. On the other hand, in parallel with the start of such AE operation, the automatic throttle mechanism also starts. That is, the first release lever 313 is rotated clockwise by the spring 313c, and the release lever 31 is rotated clockwise by the spring 313c.
4 is rotated counterclockwise, the pin 314b
The end portion 315a of the mirror drive engagement lever 315 is rotated clockwise via the mirror drive engagement lever 315. That is, one side 311c of the mirror drive lever 311 and one end 31 of the mirror drive engagement lever 315
5b is released, and the mirror drive lever 311 is rotated counterclockwise by the spring 311d. At the same time, the claw portion 311b of the mirror drive lever 311 and the tension lever 33
6 are in a locked state, the push-up lever 337 supporting the tension lever 336 rotates counterclockwise.
Therefore, the bending portion 337b of the push-up lever 337 engages with the rising portion 305c of the automatic aperture lever 305 to rotate the automatic aperture lever 305 clockwise. This causes a pin 304 installed in the aperture drive ring to operate, thereby narrowing down the aperture according to the preset position of the bell crank. Also, by rotating the push-up lever 337 in the counterclockwise direction, the mirror 338 is pushed up by the counterclockwise rotation.
8a and the mirror 338 is flipped up. A delay device (not shown) operates together with this flip-up operation of the mirror 338, and after a delay time of the delay device, the front curtain lever 333 is rotated clockwise by the mirror drive lever 311.

The delay time provided by this delay device is for starting the shutter after the time has elapsed from the maximum aperture to the minimum aperture. For this reason, the leading curtain gear 334 begins to rotate and the leading curtain travels via the leading pinion 335. As the leading curtain runs, the count start switch SW4 is turned off in a known manner, and after a time determined by the variable resistor RTv having a resistance value corresponding to the set speed, the control circuit Y is activated and a pulse is applied to the excitation coil Mg3. It will be done. Therefore, the magnetic force of the permanent magnet and the magnetic force of the magnet Mg3 cancel each other out, and the attractive force is lost. For this reason, the lock on the rear gear 339 by the suction lever 34 is released, so the rear gear 339 starts to rotate and causes the rear curtain to travel via the rear curtain pinion 340. Further, at the end of rear-cross travel, the rotation of the rear curtain gear 339 causes the rear curtain signal lever 341 to rotate counterclockwise using the pin 339a, thereby rotating the mirror tensioning lever 336 clockwise. This rotation of the mirror tension lever 336 releases the engagement with the mirror drive lever 311. For this reason, the push lever 337 is moved by the spring 305a to the automatic aperture lever 3.
05, and the mirror 338 is returned to its original position by a return spring 338c. At the same time, the automatic aperture lever 305 is rotated counterclockwise by the spring 305a, and the shield pin 304 of the aperture drive ring returns to its original open state. Also, when the trailing curtain gear 339 rotates, the winding completion switch SW5 is turned on, and the output of the comparator CP2 in block D in FIG.
0'', flip-flop FF2 is reset.

By resetting FF2, flip-flops FF3 and FF4 are also reset. When a winding operation is performed using the winding shaft 308 in this state, film winding and shutter charging are performed, and the charge lever 312 is charged via the intermediate levers 310 and 307, and the automatic aperture mechanism and mirror mechanism are charged. The disengaged portion due to the above-mentioned release operation re-engages and returns to the state shown in the third figure. Note that if the release button is kept pressed and the automatic winding mechanism is used to wind the film, the resistor R5 and A time delay occurs that is covered by the time constant of capacitor C5.

This delay time is determined according to the time required for the wound film to stabilize and return to a steady state after the chattering of the switch SW5 ends, and the winding operation is performed with the release button pressed down. Even when a camera release operation is performed, it is possible to eliminate the effects of the above-mentioned chatter and the situation where the release is performed in a state where the film is unstable. As described above, in a camera using the electromagnetic activation method according to the present invention, when the release button is operated at normal speed, the release is immediately performed as in a conventional camera; Even if the shutter is pressed down suddenly, which would be considered an operation in a conventional camera, the shelf light circuit will reach a stable state before the release is performed, so proper exposure will be achieved. In the above embodiment, the footlight switch SWI and the lead switch SW2 in the present invention are turned on by movement during the first and second strokes of the shutter release button, but these switches are limited to the above case. Needless to say, the same effect can be obtained by disposing it at a proper location on the camera exterior layer, for example.

[Brief explanation of the drawing]

Fig. 1 is a circuit connection diagram showing an embodiment of the side light circuit of a camera using the electromagnetic starting method according to the present invention, and Fig. 2 shows a circuit configuration of an embodiment of the camera using the electromagnetic starting method according to the present invention. The connection diagram and FIG. 3 are exploded perspective views showing the structure of the mechanical diamond part of the camera according to the present invention. A: Delay circuit, B: Self-timer circuit, D: Delay circuit to stabilize the film surface, Day: Battery check circuit, J
... Constant current circuit, K ... Sequence control counter, M ... Delay circuit, W ...
・・Side light, calculation, memory, display and constant voltage circuit, X・・
...Aperture control circuit, Y...Extension "second control circuit. Completion diagram"

Claims (1)

[Claims] 1 Power is supplied to the photometric circuit by the photometric signal formed by the first operation of the release operating member, and the electromagnetic release means is activated by the release signal formed by the subsequent second operation of the release operating member to start the photographing operation. In the camera, a first time signal forming means starts a time measuring operation upon a first operation of the release operating member and generates an output after a predetermined time period; a second clock signal forming means that generates an output after measuring time; and a second clock signal forming means that detects the output of the photometric circuit and selects the first clock signal forming means when the brightness is higher than a predetermined brightness level; a selection circuit that selects the second timing signal forming means during low brightness, and a release signal formed by an output from the timing signal forming means selected by the selection circuit and a second operation of the release operating member; and a permitting means for permitting activation of the electromagnetic release means by the AND operation.