JPS62210439A - Releasing mechanism for camera - Google Patents

Abstract

PURPOSE:To use a releasing mechanism optionally for proper purposes and to perform fast continuous photography by providing a timer stopping means which stops the operation of a timer when a switch means is turned off after the start of the operation of the timer. CONSTITUTION:Respective control signal lines CMD0-CMD3 to a driver control part 8 are held at levels L, H, H, and L respectively and then a sequence motor M1 is driven in a film winding direction. When a film winding detection switch SW4 is turned off on the completion of the winding of a film, the respective control signal lines CMD0-CMD3 are held at levels L, H, L, and H respectively to apply a brake to the sequence motor M1 and the control signal lines CMD 0-CMD3 are held at the level H a time DELTAT8 later to release the sequence motor M1 from being braked. Thus, if a release switch SW2 is still on after the winding is completed, next releasing operation is started a time DELTAT9 later to enter a single-shot mode and a continuous-shot mode optionally for proper purposes.

Description

[Detailed description of the invention] [Industrial application field 1 The present invention relates to a camera release mechanism.

[Prior Art and its Problems] Among cameras that double the inner cover and allow the film to be loaded automatically, some are equipped with a continuous shooting mode that enables continuous shooting. According to the disclosure of JP-A No. 60-179727, in high-speed continuous shooting mode, the release operation is performed immediately after film winding is completed, whereas in low-speed continuous shooting mode Y, the release operation is performed immediately after film winding is completed. The release is possible after a certain delay time after completion. With this kind of masochism, a fixed release invalidation period is always set during low-speed shooting mode, so there is a risk of missing a chance to shoot. Further, a mode selection means for switching between high-speed continuous shooting mode and low-speed shooting mode is required, which leads to increased camera setup.

[Means for Solving the Problems] The camera release mechanism of the present invention is a camera that winds the film by a motor, and includes a switch means that is turned on by pressing the release button, and a switch that is turned on by pressing the release button, and a switch that is turned on by pressing the release button, and a switch that is turned on by pressing the release button. If the switch means is turned on at the time,
a timer means for operating for a predetermined period of time; a release control means for inhibiting the release operation by pressing the release button while the timer is operating; and timer stopping means for stopping the operation of the timer.

[Function 1] With the above configuration, when the film winding is completed, by pressing the release button, if the switch means is on, the timer means is activated for a predetermined period of time, and if the timer means is in operation, the release control means Although the release operation by pressing the release button is prohibited, if the switch means is turned from on to off by operating the release button after the timer means starts operating, the timer stop means
The timer operation is stopped and the release is ready.
When the switch means is turned on by pressing the release button thereafter, a release operation is performed.

[Embodiment 1] FIG. 1 is a circuit diagram showing a camera system to which the present invention is applied.

1 is a camera control microcomputer (hereinafter referred to as AF) that performs functions such as sequence control of the entire camera, calculation control of exposure, and calculation control of Auto 7 Orcus (hereinafter abbreviated as AF).
It is hereinafter abbreviated as CPU) and is equipped with a data bus and various input/output terminals P1 to P18, etc. as described below.

2 is an AF distance measuring unit that measures the amount of focus shift of the subject image at the film plane equivalent position, and includes a one-dimensional self-scanning image sensor (hereinafter abbreviated as COD), a CCD drive unit, an A/D converter, and It consists of a reference power source for A/D conversion, etc. This C
Analog image information obtained by the CD is converted into a digital signal and then taken into the CPUI via the AF data bus.

φ^F, AFST8RT, and D to AFE are control signal lines for controlling the AF distance measurement subcommittee, and are connected to terminals P1 to D, respectively.
Connected to P3.

3 is a display unit consisting of a liquid crystal LCD or a light emitting diode LED, and this display displays information such as the shutter speed Tv and aperture value AV, which are the calculation results of automatic exposure (hereinafter abbreviated as AE) sent from the CPU, or the shooting mode. The image is displayed in the finder or the like by section 3. 4 is provided for each interchangeable lens, and has a maximum aperture value, a minimum aperture value,
This is a lens data circuit that stores focal length and extension amount conversion coefficients necessary for focus adjustment. When the lens is attached to the camera body, the data is transferred to the camera via an electrical contact provided near the attachment part. transmitted to the main unit.

Reference numeral 5 denotes a 7 lash circuit in the 7 lash device, which sends a guide number indicating the amount of light emitted, charging completion information, a dimming confirmation signal, etc. to the camera body.

Reference numeral 6 denotes a photometry unit that measures the brightness Bv of the subject, and is composed of a photoelectric conversion element for light reception, an A/D conversion unit, a reference voltage source for A/D conversion, a data exchange unit with the CPU, etc.
The light passing through the photographic lens is photometered according to the command from I. A film sensitivity reading section 7 automatically reads the sensitivity of the loaded film, and the film sensitivity on the film cartridge is read through an electrical contact provided in the cartridge chamber of the camera. Above display section 3. Lens data circuit 4. Flash circuit 5. Photometering section 6. Each piece of information from the film sensitivity reading section 7 is input as a serial signal to a serial input/output section (abbreviated as Ilo) via a serial data bus. In this serial input/output section, as will be described later, each selected circuit 3 to 7 uses a clock frequency φ1. A suitable clock is selected from among φ2.

8 is a driver control unit for exciting a lens drive motor and various magnets for AF, which will be described later, and output terminal P15 of the CPUI. P16゜P1fu,
Control signal lines CMDO, CMDI, CHD2 from PI3
．． Controlled by CMD3. The CNTR terminal is a pulse input terminal that counts the number of pulses sent from the driver control section 8.

SW4~S Wl, S WAEL, S WMODE
, SWUP, and SWDN are switches, one of which is grounded, and the other is connected to the control signal lines 84 to S1. AEL, MODE, LIP
, are connected to the L terminals P4 to P11 via DNe.

SWI is a photometry switch that is turned on in the first step when a release button (not shown) is pressed, and the CPU 1 outputs a signal to start photometry and distance measurement.

While this switch SW1 is on, if the lens is in an out-of-focus position due to distance measurement, the lens continues to be driven, and when the in-focus position is reached, the lens driving is stopped. When the release button is released and the switch SW1 is turned off, the driving of the lens is immediately stopped. SW2
is a release switch that is turned on in the second step of pressing down the release button, and if this switch SW2 is turned on when the release is possible, the CPU instructs the release operation. Incidentally, when the release switch SW2 is turned on, the photometry switch SW1 is configured to be kept in the on state. SW3 is a mirror up detection switch, which is turned on when a mirror (not shown) is fully raised. SW4 is a film winding completion detection switch, which is off when film winding is completed.
It is on when winding is not completed.

SWΔEL is a switch for locking the photometric value from the photometry section 6. When this switch 5WAEL is turned on, the photometric value is locked, and this switch 5W
When the AEL is turned from the on state to the off state, a new photometric value is taken into the CPU 1. SWMODE is a mode switch for selecting the exposure mode of the camera, and by pressing switch 5WUP or 5WDN while pressing this mode switch SWMODE, program mode is selected.

You can choose between aperture priority mode and shutter speed priority mode. Also, switch swup or 5
When only WDN is turned on, the aperture value can be arbitrarily set in aperture priority mode, and the shutter speed can be arbitrarily set in shutter speed priority mode.

P12. P13. P14 is an output terminal,
Control signal lines IENDEN, RELEN, III respectively
OR circuit ORI, OR2, OR3 via AKEEN
are connected to one input terminal of each of the control lines AFEND, S2. S1
is connected. The output terminals of OR1, OR2, and OR3 are connected to an interrupt input terminal INT via ANDl of an AND circuit. When this terminal INT changes from the "H" level to the "L" level, it accepts an interrupt from the outside, and when the CPU1 is in a non-operating standby state, it releases the standby state and starts the CPUI. It looks like this.

RESET is a reset terminal pulled up to +VDD by a resistor R, and when the level changes from L level to H level, the CPUI is reset. X is a crystal oscillator that provides a clock signal to the CPU1.

Next, the functions of each circuit will be explained.

Control over the AF distance measuring section will be explained with reference to the time chart shown in FIG. The CPUI sends a control signal line AFS to start accumulating charge in the CCD inside the AF distance measuring section.
By changing T8RT from H level to L level and changing the control signal line AF END from H level to L level from the AF distance measuring section (time t + ), the CPU 1 is notified of the completion of charge accumulation. Inform. CPUI is control signal line AF
When the L level of END is detected, the control signal line IENDEN is set to H in order to generate an interrupt to the CPUI.
From level to L level. At this time, the control signal I
Since RELEN and 1EEN are at H level,
ANI) 1 inputs a signal that changes from H level to L level to the interrupt terminal INT, and an interrupt is generated in the CPUI. Thereafter, the control signal line IENDEN is returned from the L level to the H level.

On the other hand, by detecting the L level of the control signal line AFEND, the CPU changes the control signal line AF 5TART to the H level at time t2), and when the AF distance measuring unit detects this,
The control signal line A F 5TART is returned to the H level (time t), and the A/D converted video information from the COD is read into the CPUI. Then, the AF operation based on the AF distance measuring unit is completed and the release is possible at h7~+#
11-en, Fushi Daimu & Il Cable subp first ^ Rai T first i
From MA level to L level. At this time, the control signal line I
Since both ENDEN and -^KEEN are at the H level, the terminal INT changes from the H level to the L level, so an interrupt is generated in the CPU again, and thereafter the control signal line RELENfe returns from the L level to the H level.

FIG. 3 shows a clock selection circuit in the serial 110 section.

CS LM, CS DSP, CS DX, CS
LENS, CS FLASH1! , respectively photometry section 6
9 display section 3. Film sensitivity reading section7. Lens data circuit 4. This is a chip select signal for selecting the flash circuit 5. 08LH, CS DSP, CS D
Each signal of X is input to AND2, and the output signal of this AND2 is input to one input part of AND3. C.S.L.
Each signal of ENS and CS FLASII is ANDed.
4 and one input section of AND5, and also CS
The LENS and CS FLASH signals are connected to AND5 and AN via inverters INVI and IN2, respectively.
D4 is input to the other input section. And this A
The output signals of ND4 and AND5 are input to OR4, and the output signal of OR4 is input to the other input section of AND3. The output signal of AND3 is A N D 6
It is input to one input section of AND1 via INV3.

The other input of AND1 and AND6 receives a clock pulse with a frequency of φ1 and a clock pulse with a frequency of φ1 that is slower than φ1.
2 clock pulses are respectively input. AND6
The output signals of ANDl are respectively input to OR5,
This OR5 is output as a serial clock signal SCK.

The table below shows a logic table in the block diagram consisting of the above configuration.

Table 1 LHHHHL　φ.

HLHHHL φ1 HHLHHL φ1 HHHLHHφ2 HHHHLHφ2 In the above table, for example, when the photometry section 6 is selected, only the C3LM signal becomes L level and each other signal becomes H level due to the negative logic signal, and in this case, from AND3 L level is output, ANDl is turned on, and OR
5 outputs a serial clock signal with a clock frequency of φ1. As can be seen from Table 1, when one of the photometry section 6, display section 3, and film sensitivity reading section 7 is selected, the clock frequency of the serial clock signal is φ1, and the clock frequency of the serial clock signal is φ1, and the clock frequency of the serial clock signal is φ1, and the clock frequency of the serial clock signal is φ1, 5 is selected, the serial clock signal has a slow clock frequency φ2.

This is because the lens and 7 latchese device are connected to the camera body through electrical contacts, which tends to cause delays in signal transmission, and there is a risk that serial data may not be communicated correctly. The other clock frequency φ2 is adopted.

explain.

ICMG is a magnet for holding one shutter curtain,
When the control output line i cMco becomes L level, the magnet (ICM) is energized and the first shutter curtain is held. 2CMG is the magnet F for holding the second shutter curtain, and the control output line 2 CMGO becomes L level. When the level is reached, the magnet) 2CM is energized, the second shutter curtain is held, and the time from the release of the first curtain shutter to the release of the second curtain shutter corresponds to the shutter speed. . FMG is a magnet for locking the diaphragm, and by keeping the control output line FMGO at the L level for a certain period of time, the diaphragm is locked in a predetermined position.

Q1 to Q6 are transistors, respectively, and transistors Q1 to Q4 are for driving the motor M1, and are connected in a bridge configuration to enable forward and reverse rotation. Further, transistors Q3 to Q are also connected in a bridge configuration for driving motor M2, and both terminals of motor M1 are connected to a common connection point with transistor Q, and both terminals of motor M2 are connected to a common connection point with transistor Q. are transistors Q, and Q4
and the common connection point of transistors Q and Q6. With this connection, transistor Qi
+Q is shared by the two bridges. The motor M1 is a camera sequence control motor, and by rotating in the forward direction, the mirror is raised, and by operating the preset lever, the aperture mechanism is narrowed down to a preset value, and by rotating the motor M1 in the reverse direction, the film is advanced. Then, the mirror system is charged and the preset lever is returned. Further, the motor M2 is a lens driving motor used for AF, and when rotated in the forward direction, the lens is extended, and when rotated in the reverse direction, the lens is retracted.

ON and OMs are control signal lines for switching each transistor.

Table 2 below shows the on/off states of the transistors Q, -Q, which are controlled by the control signal lines ON, .about.OMg, in order to control the drive motors M, . . . M2.

Table 2 Q, Q2 Q3 Q, Q5Q6 M,
M2 Off Off Off Off Off Off Stop Stop On Off Off On Off Off Forward Stop Off On On Off Off Off Reverse Stop On Off On Off Off Off Braking Stop Off Off Off On On Off Stop Forward Off Off On Off Off On Stop Reverse Off Off On Off On Off Stop Braking In this example , M, and M2 are not driven at the same time, transistors Q, ,Q, are used in common for both motors, and six transistors are used. Thereby, the number of terminals of the CPU 1 and the driver control section 8 can be reduced, and the mounting area of the driver part 8 occupying the control board can be reduced.

81 and 82 are an aperture encoder and an AF encoder consisting of 7 autocouplers, and control signal lines PD, PT
, and connected to the driver control unit 8 by PO2 and PT2.

The aperture encoder 81 monitors the stroke of the aperture preset lever at the time of release. At the time of release, the control signal line PD becomes H level as the aperture locking magnet FMG is driven, and the light emitting diode 8
The light emitted by 1a is detected by the 7-channel transistor 81b, and is input to the driver control unit 8 via the control signal line PT.

After being waveform-shaped into a pulse by this driver control unit 8, it is sent to the counter input terminal CNTR of the CPUI via the control signal line CNTR0.

The control signal line PD is at L level except during release.

The AF enhancer 82 is for monitoring the number of rotations of the lens drive motor M1 during AF, that is, the amount of movement of the lens. During AF, the control signal line PD2 becomes H level, and the light emitted by the light emitting diode 82a reaches 7 ototra. - Detected by the sensor 82b and input to the driver control section 8 via the control signal line PT2. After the waveform is shaped into a pulse by this driver control unit 8,
It is sent to the terminal CNTR of the CPU1 via the control signal line CNTR0. The control signal line P except during AF
D2 is at L level.

In this embodiment, as described above, the aperture encoder 8
1 and the AF encoder 82 are waveform-shaped by the driver control unit 8, and then sent to the terminal C of the CPU i.
Input to NTR. This reduces the number of terminals of the driver part 8 and the CPU.

CHDO to CMD3 are control signal lines output from output terminals Q15 to P18 of the CPUI to control the driver control unit 8.

Next, the configuration of the decoder section in the driver control section 8 will be explained with reference to FIG.

Each of the control signal lines CMDO to CMD3 forms the rows ■, ■, ■, ■ in the IJx configuration, and these control signal lines are connected to the inverters INVII to INV, respectively.
The control signal lines inverted by 14 are in rows ■, ■, ■.

■It forms. Then, the lines ■, ■ are connected to ANDII, and the lines ■, ■, ■, ■ are connected to AND12.

Further, each row of the ponds A N D 13 to AND 25 is connected as shown in the figure. The output terminals of ANDll and AND12 are connected to 0R11, and a driver AMP is further connected to the output side of this oRll. This driver AM
The output part of P becomes the control signal line OH1, and the other control signal lines ON2 to ON, I CMC0, 2CMGO.

FM (:0.PD, , PD2 et al., as shown, IN
V15~I N V 18,0R12~0R16,AN
By configuring with D26, each is obtained.

Table 3 shows each logical value in the decoder section and the operating state of the camera at this time.

As a result, the signals from the four control signal lines CMDO to CMD3 are used to control the control signal lines ○H1 to ON for driving the motor M51M2, and the three magnets ICK and 2C.
MG, FMf; Control signal line I CMC0, 2C for control
M.G.O.

It is possible to control a total of 12 control signal lines, including the control signal lines PD, PD2, for controlling the FMGO and the two light emitting diodes 81a and 82a, reducing the number of CPU output terminals and wiring. reduction is possible.

Below, the operation of the camera system to which the present invention is applied will be explained.
Explain based on the chart.

First, when a battery is installed in the camera body and power is supplied, the reset terminal RESET rises from L level to H level via resistor R, which resets cput, and the battery is installed as shown in Figure 5. The routine is executed.

That is, in step #1, the board that is the input/output part in the CPU, the RAM (random access memory) that is the storage part, and the 7 lags for various judgments are cleared by reset, and then the steps from step #2 onwards are cleared. Proceed to standby routine. In step #2, flags are initialized, and in the next step #3, the timer built into the CPU 1 is stopped and timer interrupts are prohibited. In step #4, a startup interrupt is permitted. That is, in order to permit an interrupt by the photometry switch SWI, which is turned on at the first step of pressing down the release button, the control signal line -KEEN is changed from the H level to the L level. And in step #5 CP
The UI stops the clock and enters standby state.

In the cpui standby state, the control signal line IE
NDEN and 4 are both at H level, and only control signal line -8 KEEN is at L level as described above. Therefore, regardless of the states of the control signal lines AFEN[) and S2 that are input to the other one of ORI and OR2, the respective power portions of ORI and OR2 are both suppressed to the H level. Now, the release button is not pressed and the metering switch SW1
is off, the control signal line S1 input to the other side of OR3 is at H level, and OR3 outputs H level, so H level is input to interrupt terminal INT via ANDI.

Next, when the photometry switch SW1 is turned on from off by the first step of pressing down the release button, the control signal line S1 goes to L level, and OR3 outputs L level, so the output of ANDl changes from H level to Changes to L level. As a result, an interrupt is generated at the interrupt terminal INT, the CPU changes from the standby state to the startup state, and executes the startup routine shown in FIG.

At step #10, the state of the activation flag is determined.

This startup flag is set to “1” after the CPUI starts up, and is set to “θ” immediately before the CPUI enters the standby state.
Therefore, immediately after the CPU 1 is started, the start flag is 0, and the process proceeds to the start processing program after step #11. In step #11, the start flag is set to 1, and The control signal is changed from L level to H level. As a result,
When OR3 outputs the H level, the interrupt terminal INT is kept at the H level via ANDl, and the CP
A startup interrupt is prevented from occurring in U1. In step #12, the CC which is the distance measuring element in the AF distance measuring section 2
D is initialized and unnecessary charges accumulated in COD during non-operation are removed.

8T to initialize COD in step #13.

After waiting for a period of time, the initialization of the distance measuring element COD is completed in step #14, and then the process proceeds to step #1.
At step 5, a photometry start command is sent from the serial I section 10 to the photometry section 6 via the serial data bus, thereby starting photometry of the subject brightness that has passed through the lens.

In the next step well 16, timer TMR for power hold is set.
2 is set and started. Until the time ΔT set by this timer TMR2 elapses,
Itsu+sw 1, SW2.5WAEL-8WUP, 5
Unless any of the WDN buttons are pressed, the CPUI will go into standby mode. Then, in step #17, the state of the photometry switch SW1 is determined,
If the switch SWI is off, that is, if the control signal line S1 is at H level, the process proceeds to a repeating loop from step #17 to the photometry routine of step #20.

This photometry routine will be explained with reference to FIG. Step #
At 200, mode switch SWMQtlE.

Up switch swap, down switch 5WII))
There is an exposure mode by reading the status of l.
-Iyke-+It m l sorrow 1 → fu) 1 fijo 1
%7Kohachi1. □Greetings 1 7. -1〃- Setting data such as speed Tv is read. In step #201, the film sensitivity reading section 7 reads the film sensitivity Sv.
is taken into the CPUI via the serial data bus. In step #202, seven flash data such as the flash device installation data, charge completion signal, dimming confirmation signal, etc. read from the flash circuit 5 are taken into the cput via the serial data bus. And step #20
At step 3, lens data such as the maximum aperture value, minimum aperture value, focal length, extension amount conversion coefficient, etc. unique to the attached lens read from the lens data circuit 4 is taken into the CPUI via the serial data bus. Furthermore, as mentioned above, the signals on this serial data bus may be communicated with the circuits 3 and 6.7 within the camera body, or with the circuits 4.5 and 4.5 connected to the outside via electrical contacts. Depending on whether
The clock frequency of serial data is selected as φ1 or φ2.

In step #205, the state of the focus zone flag is determined. This flag is set to “1” when the lens is in focus due to distance measurement, or when the lens is in focus after driving the lens by AF. Not in focus, that is, the flag is “O”.
”, the brightness Bv of the subject is newly read by the photometer 6 in step #206.

In this example, after the lens is focused, the brightness B
This is because it has the function of locking y.

In step #210, steps 9200 to #20 described above
Based on the data read in step 6, the aperture value Av and shutter speed Tv are calculated by predetermined calculations. In step #211, data is sent to the display unit 3 via the serial data bus in order to display the calculated aperture value Av, shutter speed Tv, exposure mode, etc. in the 7 viewfinder.

Then, in step #212, data such as the photographing aperture value Av and film sensitivity Sv are sent to the flash circuit 5.

Since the series of operations related to exposure calculation is completed in steps #200 to #212, the AF priority flag is set to "1" in the next step #213. This AF priority flag is used to determine whether to give priority to the photometry loop or data acquisition from the COD when integrating the signal from the COD while executing the photometry routine. .

In step #214, the state of continuous shooting delay 7 lag is determined. The details of this flag will be described later, but if the continuous shooting delay flag is reset to "O", the process proceeds to step #218, but if it is set to "1", the process proceeds to step #215.

Steps #215 to #217 are a loop for determining whether to cancel the continuous shooting delay. In step #215, the state of the release switch SW2 is determined, and the state of the release switch SW2 is determined.
If the switch SW2 is on, the process advances to step #218 and the continuous shooting delay mode is continued, but if the switch SW2 is off, the continuous shooting delay mode is canceled. That is, step #2
16, the continuous shooting delay 7 lag is reset to O, and the next Stellar 0 operation 917 F? l -5T pNA'r2
A tail mountain I Jvh sentry-tr*timer TMR4
Disables interrupts. In this way, if you turn off the release switch SW2 during the continuous shooting delay period, the continuous shooting delay mode will be canceled, so by turning on the release switch SW2 again, you will be able to release the camera, and even faster continuous shooting will be possible. becomes.

In the next step #218, various operation switches SWI are used as a power hold determination.

S W 2, S WAEL, S WMODE,
Only when the S WuP or S WDN state is determined and any switch is operated, a set time ΔT5 is set and started again by the power hold timer TMR2 in step #219. After that, in step #220, step #17 of the startup routine is executed.
Return to.

If none of the switches are operated and a time ΔT elapses after the power hold timer TMR2 starts, a timer interrupt is generated by the timer TMR2. This timer interrupt is shown in FIG.

At step #250, the stack pointer is reset, and at step #251, the CPU 1 jumps to step 2, after which the CPU 1 enters a standby state.

On the other hand, if it is detected in step #17 that the photometry switch SW1 is on, the process proceeds to the integration routine starting from step #21.

In step #21, an integration start command is sent to the AF distance measuring section by changing the control signal line AF5TART e from H level to L level, and the distance measuring element COD
starts to accumulate charge. Then, in step #22, the integration end interrupt is enabled. That is, when the accumulated charge reaches a predetermined level and the control signal line A F END is changed from H level to L level to notify the end of integration, the CP
The control signal II4l of the UI is changed from the H level to the L level.

In the next step #26, the state of the photometry switch SW1 is determined, and if it remains on, the process proceeds to the photometry routine shown in FIG. 7 in step #27, and then again from steps #26 to
Return to the loop of #27 and wait for the integration end interrupt 6 If the camera goes from standby to operating state by turning on the photometry switch SW1, and photometry and CCD charge integration start at the same time, this photometry will be executed at least once. After going through the routine, unless the AFF destination flag is set to 1 in step #213, no integral data is taken in.

On the other hand, if the photometry switch SW1 is turned off in step #26, the output terminal P of the CPU 1 is turned off in step #28.
Control signal from 2 #! By returning AF 5TART from the L level to the H level, a forced integration stop command is sent to the AF measuring section 1 2. And in step #30,
By returning the control signal line IENDEN from the output terminal P12 from the L level to the H level, interrupts caused by the end of integration are prohibited. After that, the process returns to step #17.

Now, during the loop of steps #26 and #27, the charge accumulation of the COD is completed and the control signal line AFENII
When is changed from H level to L level, as mentioned above,
An interrupt for the end of integration occurs, and the program is changed to step #10 and subsequent steps.

In this way, when the charge accumulation on COD is completed, C
To interrupt PU1 and proceed to another program,
This is because the charge accumulation time for the COD changes depending on the brightness of the object, making it difficult to manage the routine time for charge accumulation, and thus reducing the effective use of the CPU 1.

The state of the startup flag is determined in step #10,
At this point, CPU1 is already booting up and the boot flag is set to 1, so step #10
Proceeds to step #40, where C is sent via the AF data bus.
It is determined whether or not the charge accumulated on the CD is being loaded. If the loading operation has been completed, interrupts are prohibited in step #41, and the process proceeds to the release processing routine from step #60 onward. However, at this point, Since the acquisition is in progress, the integration starts from step #42.First, in step #42, it is determined whether the AFF destination flag is set. If it is not set to , in order to give priority to photometry over data collection (including sound data from COD), perform step #21. Similar to #22,
In steps #48 and #49, an instruction to start integration is issued again to the AF distance measuring section, and then an interrupt due to the end of integration is permitted. Then, in step #50, the original routine, step #26. Return to #27.

On the other hand, if the AFF destination flag is set to 1 in step #42, the process proceeds to step #43, and the state of the continuous shooting delay flag, which is set to "1" upon completion of film winding, is determined. If the flag is set to 1 during a delay in snapshot shooting, the process proceeds to step #48 without taking in data from the COD, and only charges are accumulated in the COD again. On the other hand, this continuous shooting delay flag is 0
If it has been reset to 4, go to step #44.
g+′+:nIII:fd164/T”+m
=&1bslJah*hahaha/1%+-ta are sequentially taken into the CPU 1 via the A and F data buses. Then, in step #45, the AFF destination flag is reset to (),
At step #46, the stack pointer is reset so as not to return to the original routine. This results in
At step #47, step #100 shown in FIG.
Jump to the AFF routine starting from .

In this way, at the same time as photometric calculation is started (step #15), charge accumulation in the COD is started (step #21).
However, during the first photometry calculation (AF priority flag = 0), even if the charge accumulation in the CCD is completed, the COD charge is not captured and only the charge accumulation in the COD is repeated (step # 42→#49), the charge accumulation in the CCD ends in a relatively short time after the end of the photometric calculation and the loop of steps #26 to #27 is exited), and the process can proceed to the AFF processing routine, so the first photometric calculation is completed. The processing time can be shorter than if the charge accumulation in the CCD is started after the completion of the process.

In other words, when it is relatively dark and the charge accumulation time of the CCD is long, the charge accumulation is completed after the photometry calculation is completed.
The time required to determine focus is shorter than when charge accumulation in the CCD is started after photometric calculation.

If it is relatively bright and the COD accumulation time is short, charge accumulation will be completed on the island during the photometric calculation, but by starting charge accumulation again, it will be necessary to complete the COD charge accumulation after the photometry calculation. The time is maximum, COD after photometry calculation is completed.
On average, CO
This is approximately half the time required for charge accumulation of D.

Next, if the continuous shooting delay flag is set to 1,
Even if an interrupt occurs due to completion of charge accumulation in COD,
The reason why charge accumulation in the CCD is started again (steps #43→#48) without taking in data from the CCD will be described.

In response to the COD integration end interrupt that occurred during the snapshot delay period, the data from the CCD is taken in and calculation is performed to calculate the amount of defocus, which is the amount of lens extension for AF, and the in-focus state is determined by the focus judgment. If the subject moves or the composition changes during the remaining continuous shooting delay period until release is possible, the continuous shooting delay mode will be canceled. This is because there is a risk that the focus will shift during subsequent release. Therefore, after the quick-shot delay mode is released, data is fetched from the CCD and the AF defocus amount is calculated.

FIG. 9 shows the AFF processing routine.

In step #100, the defocus amount and defocus amount direction are calculated by processing data taken in from the CCD within the AF distance measuring section via the AF data bus. In step #101, the focus of the lens is determined, and if the amount of defocus is greater than a certain value, it is determined that the lens is out of focus, and the process starts from step #112.
The process proceeds to the F motor control routine, but if the defocus amount is less than the predetermined value, it is determined that the focus is in focus, and the process proceeds to the focus processing routine from step #102.

Alternatively, display the focus using the light emitting diode LED in the viewfinder, and set the focus zone flag to 1 in order to memorize the in-focus state in the next step #103.
In step #104, the signal control line RELEN4fH level of the output terminal P13 is set to the L level in order to permit a release interrupt caused by turning on the release switch SW2. If the release switch SW2 is turned on after this point, an interrupt is generated in the CPU, and the process proceeds to the release processing routine from step #60 shown in FIG. 6.

Then, keeping the lens locked in focus, step #
In step 105, the state of the photometry switch SWI is determined, and if the switch SW1 is on, the process proceeds to the photometry routine again in step #106, loops back to step #105, and waits for an interrupt by the release switch SW2. . On the other hand, if the photometry switch SWI is turned off, the process proceeds from step #105 to step #107, and -Mf: こ る A 吃; こ concubine -411 啼?
After resetting the focusing zone flag to O in step #108, step #107
Then jump to step #17 in FIG.

Next, the AF motor control routine after step #112 will be explained.

First, in step #112, the defocus amount calculated in step #100 is calculated based on the extension amount conversion coefficient read from the lens.
It is converted into the number N of pulses sent to the encoder 82. In steps #113 and #114, the number of pulses N1
is compared with the reference pulse number N0, and if N1≧N, it is determined that the defocus amount is relatively large, and the process proceeds to the FAR zone processing routine starting from step #140.
Also, N, <N. If so, it is determined that the defocus amount is relatively small, and the process proceeds to the NEAR zone processing routine starting from step #115.

Now, in step #140, the values of N and No are CPU
After setting the counter in I, the counter is started. Then, in step #141, AF Momo-M2
AF to remember that the is in FAR zone operation
MF7 lag is set to 1. Next step #142
interrupts from the counter are enabled, and step 14
3, based on the defocus direction calculated in step #100, the AF momo-M2 is continuously energized to drive the lens toward the in-focus position at high speed. At this time, depending on the defocus direction, each of the control signal lines CMDO-CMD3 from the CPUI to the driver control unit 8 is set to H,
The level is set to H, H, L or H, H, L, H.

After resetting the AF priority flag to O in step #144, step #145. A loop formed by the photometry switch SW1 and the photometry routine is executed in #146. In this loop, unlike the loops in steps #105 and #1106, a counter interrupt by AF Momo-M2 is waited for. Now, the lens is driven by AF Momo-M2, and the CPU CNT is
When a predetermined number of pulses N, -N, are counted at the R terminal, an interrupt is sent to the CPU 1, and the process proceeds to the pulse counter interrupt routine starting from step #150 shown in FIG.

At step #150, it is determined whether the release is in progress or AF is in progress, and the AFMF flag or AF MN7 lag is set to 1.
If it is set to , it is assumed that AF is in progress and step # is set.
The process proceeds to the AF motor pulse interrupt processing routine starting from step #160.Furthermore, since the current case is the FAR zone, the process proceeds from step #160 to step #171 based on the zone determination in step #160, and the AFMF7
Lag is reset to O. In step #172, the reference pulse number N0 is set in the pulse counter, and in step #
Start the counter at 173 and step #1
At 74, counter interrupts are enabled. In step #175, the stack pointer required for returning from this counter interrupt routine to the original routine is reset. As a result, the interrupt processing routine jumps to the next routine without returning to the original routine, and in step #176, jumps to the NEAR zone control routine starting from step #121.

Now,! @9 Returning to step #114 in the diagram, N
+<No, it is determined that the defocus amount is relatively small, and the NEAR zone processing routine from step #116 onwards is proceeded. In this routine, step #1
Unlike the FAR zone processing routine after 40, the AF MOMO-M2 is driven at a low speed by intermittent pulses to avoid overrunning the target lens stop position, and the photometry routine is not called. This is because the defocus amount is small, so the time required to reach the target value is short, and the CPU processing becomes complicated. This routine will be explained below.

After setting the number of pulses N1 to the pulse counter at step #116, the counter is started at step #117.Then, at step #118, the counter interrupt is enabled, and at step #121, the AF momo - The AFMN7 lag to remember that M2 is operating in the NEAR zone is set to 1. In the next step #122, the AF mode M2 is energized, and in step #1
After waiting T1° for a predetermined time in step 23, the AF motor M2 is de-energized in step #124, and at the same time, electrical braking is applied to the AF motor M2 in step #125, and the process proceeds to step #126. After a predetermined time ΔT II, the braking to AF Momo-M2 is stopped in step #127. Then, in step #128, the state of the photometry switch SWI is determined, and if it is on, step #1
22, and continues going through the loop formed by steps #122 to #128.

During this time, the pulses output from the AF encoder by the above-mentioned intermittent driving of AF Momo-M2 are counted,
When this count value reaches N, an interrupt is issued to the CPU 1, and the program proceeds to the pulse counter interrupt routine shown in FIG.

In the loop formed in steps #122 to #128 and the loop formed in steps #145 to #146, when the lens has finished extending by driving the AF Momo-M2, it is necessary to interrupt the CPU and proceed to another program. , the time required to extend the lens changes depending on the amount of defocus, lens torque, etc., making it difficult to manage the time of the AF Momo-M2 drive routine, and the CP
This is because the UI cannot be used effectively.

Now, in Fig. 10, in this case, the AFMN7 lug is set, so step well 150→#16
0-. Proceeds to #161, AF Momo-M2 is stopped,
The AFMN7 lag is reset to O in the next step #163. The brakes are applied to AF Momo-M2 in step #164, and after waiting for 617 hours in step #165,
At step #166, the brake for AF Momo-M2 is turned off. In step #167, the stack pointer is reset, and in step #168, the program jumps to step #21 in FIG. 6, starts integration in the COD, and repeats the photometry routine of step #27. At this time, since the AF priority flag has been reset to 0, the mode is set to photometry priority mode (I), and after one rotation of the photometry loop, data can be taken in from the CCD. This is because the photometric calculation is omitted in the NEAR zone control routine in FIG.

In addition, in the AF processing routine of FIG. 9, if the photometry switch SWI is turned off while AF Momo-M2 is operating, step #
128 and or step #145 to step #13
0, AF Momo-M2 is stopped, and step #13
1 disables counter interrupts. Then, in step #132, both the AFMFt and AFMN7 lags, which memorized that the AF motor is in operation, are reset to 0, and in step #133, step #17 in FIG. Proceed to AF screen.

Returning to Figure 9, after AF focusing, release switch SW2
If is turned on, the release interrupt is enabled in step #104, so the release interrupt is enabled.
18ru I 1961 Shil? ↓ Return to the starting routine of 1st pull of the spear and 1st pull of the spear, proceed to steps #10 → #40 → #41, and change to the release processing routine.

First, in step #41, other interrupts are prohibited, and in step #60, the focusing zone flag set by the AF screen is reset to O. In step #61, the photometry section Sends an order to stop photometry. In the next step wells 62 and #63, by setting the control signal lines CMDO to CMD3 to H, L, H, and L levels for the driver control 1 section 8, the magnets of the shutter 1 curtain and the shutter 2 curtain are set to H, L, H, and L levels, respectively. ) ICNG and 2
CM(: is held and a command to raise the mirror is sent. In step #64, the aperture value Av obtained in the exposure calculation routine is converted to the number of aperture stops from the open aperture value of the attached lens. 65, change the value to C
Set in the pulse counter inside PU1.

At step #66, counter interrupts are enabled.

At step #67, when the mirror up is detected, the ``k'' charge of 8W3 is activated, and the process remains at step #67 until the switch SW3 is turned on due to the completion of the dollar up. During this period, the pulse output from the aperture encoder 81 is transmitted from the driver control unit 8 to the CNTR of the CPU 1.
When the number of count pulses is input to the terminal and becomes equal to the value corresponding to the number of refinement steps set in step #65 above, a counter interrupt occurs, and the program starts at step #150 shown in Figure 10. Execute interrupt handling routine.

First, in step #150, during release operation 6-AF
The decision has been made, and in this case, the release is in progress, so
The aperture interrupt processing program from step #151 is executed. In step #151, counter interrupts are prohibited, and in step #152, each control signal line CMDO-CMD3 is set to H and L to the driver control unit 8.
, H, and L levels, the aperture i) locking magnet) FMG is energized to stop the aperture preset F lever. After waiting for 616 hours in step #153, each of the control signal lines CMDO to CMD3 is set to H1L, L, and H levels in step #154, thereby turning off the power to the aperture locking magnet 7) FMC. A return command at the next step #155 returns to step #67 of the release processing program in FIG.

When the switch SW3 is turned on due to completion of mirror up in step #67, the process proceeds to step #69, where each control signal line CMDO-CMD3 is set to HIL, L, and L levels, respectively.1 From this, the brake to the sequence motor M1 is applied. is turned on, and after waiting for ΔT1 time in step #70, each control signal line CMDO~
By setting CMD3 to H, H, and H levels, you can create Z-Kensmoke M.

brakes are turned off. Furthermore, by turning off the power to the magnet (ICNG) in step #72,
The first shutter curtain is released from holding and starts. In step #74, the time corresponding to the shutter speed Tv obtained in the exposure calculation routine is counted as the shutter opening time, and in the next step #75, each control signal line CMDO to CMD3 is set to H and H, respectively. . As a result, after the release processing program in steps #60-#75* of 20 or more in which the shutter is opened for a time T, v is completed, step #77
, reset the stack point and proceed to step #76.
Then, the program jumps to step #80 in FIG. 11, which is the film winding processing routine.

First, in step #80, each of the control signal lines CMDO to CMD3 for the driver control unit 8 is connected.

By setting the H, H, and L levels, the sequence motor M is driven in the film winding direction. Step #8
At step #1, when the film winding is completed and the film winding detection switch SW4 is opened, step #8
Proceeding to step #3, the control signal lines CMDO to CMD3 are set to H, L, and H levels, thereby applying a brake to the above-mentioned Siken smoke M1. After waiting for 618 hours in step #84, step At #85, each control signal line CMno ~ rMnjlt-Jh ph M,
M-T-f-M'IiHEL>+IN KNEW, the brake for the sequence motor M1 is turned off. In step #86, the state of the release switch SW2 is determined, and if it is off, the process jumps to step #15, which is the photometry processing program in FIG. 6, in step #90, but the release switch SW2 is still turned on. If the shutter remains open, the shutter will immediately enter the release operation and take a snapshot when the photometry and distance measurement are completed.

In this embodiment, a certain period of time ΔT starts from the time when the film winding operation is completed (step #85).

During this period, the release is prohibited even after photometry and distance measurement are completed, thereby preventing continuous shooting from being performed against the photographer's intention.

That is, in step #87, the continuous shooting delay flag is set to 1. This flag is used in the photometry routine after film winding is completed to determine whether release is possible.

In the next step #88, time ΔT is set and started in timer TMR4. In step #89, an interrupt occurring a time ΔT after the start of the timer TMR4 is permitted. Thereafter, in step #90, the process proceeds to the photometry processing program in step #15. When the timer TMR4 interrupt occurs in the photometry loop after winding is completed, the continuous shooting delay timer interrupt from step #280 shown in FIG. 12 is executed.

First, in step #280, timer TMR4 is stopped, in step #281, the aforementioned continuous shooting delay flag is reset to O, and in step #282, the process returns to the original routine.

In this way, after winding is completed, release switch SW2
remains on, the time ΔT.

The next release operation is then started, and the single-shot mode and continuous-shot mode V can be used as desired according to the photographer's will.

As explained above, if the release switch SW2 remains on, the delay continues, resulting in low-speed shooting mode, and after the film winding is completed, the release operation is resumed after the delay period Δ set by the timer TMR4. Meanwhile, within this delay period ΔT9, the release switch SW2 is turned off and the single-shot mode is entered. In this way, it is possible to use the quick-shot mode as desired by operating the release button, and after canceling the low-speed quick-shot mode with the release switch SW2,
By turning on the release switch SW2 again,
The shutter release is now possible, allowing for faster snapshots.

[Effect of the invention 1 According to the present invention, it is possible to use the continuous shooting mode as desired by operating the release button without providing a selection means for selecting the continuous shooting mode. It is possible to take quick pictures. Furthermore, it is possible to prevent failures such as continuous shooting due to an error in the setting mode selection means.

[Brief explanation of drawings]

FIG. 1 is an electrical circuit diagram showing an embodiment of a camera system to which the camera release mechanism of the present invention is applied, and FIG. 2 is a time chart showing the operation of the AF distance measuring section in FIG. 1.
3 is a circuit diagram of the clock selection section in the serial 110 section of FIG. 1, FIG. 4 is a circuit diagram of the defog section of the driver circuit section of FIG. 1, and FIGS.
70 is a chart for explaining the operation of the camera system shown in FIG. 1... CPU, 2... AF distance measuring section, 3... display section, 4... lens data circuit, 5... flash circuit, 6... photometering section, 7... film sensitivity reading section,
...Driver control unit, M,,M,...Drive motor, 81...Aperture encoder, 82...AP Enfug, ICK, 2CMC, FMG...Magnet. Patent applicant: Minolta Camera Co., Ltd. Agent: Patent attorney: Soga Aoyama (2 persons) Figure 2 Figure 3 Figure 11 Figure 1z

Claims (1)

[Claims] (1) A camera that winds film using a motor, which includes a switch that is turned on when a release button is pressed, and a timer that operates for a predetermined period of time if the switch is turned on when film winding is completed. means, a release control means for prohibiting the release operation by pressing the release button while the timer is in operation, and a timer for stopping the operation of the timer when the switch means changes from on to off after the timer starts operating. A camera release mechanism characterized by comprising a stop means.