KR910009037Y1 - Automatic photographing control circuit for steel camera - Google Patents

Abstract

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Description

Automatic Continuous Shooting Control Circuit for Still Cameras

1 is a circuit diagram according to the present invention.

* Explanation of symbols for the main parts of the drawings

SO: main switch S1-S2: 1st, 2nd release switch

S3: Selection switch R1-R7: Resistance

Q1-Q2: transistor NAD1: NAND gate

NOR1: Noah gate Mg: Magnet

The present invention relates to an automatic continuous shooting control circuit in a still camera, and in particular, continuous continuous shooting with a signal corresponding to an initial release generated electronically by recognizing an automatic continuous shooting designation signal and an operating state signal of the camera. The present invention relates to an automatic continuous shooting control circuit in a still camera.

In general, high-end cameras use a motor driver as an accessory, and automatically detect the camera's charge lever and take a continuous shooting. Recently, a mid-range compact camera uses a built-in motor to perform continuous shooting.

However, most of the conventional cameras are designed to operate the release device mechanically, so that continuous mechanical shooting is difficult when continuous shooting is required, and continuous shooting is difficult when electronic. Due to the complexity of the input signal processing according to the operating state, continuous shooting was not possible.

Therefore, an object of the present invention is to detect the automatic continuous shooting mode selection signal and the operating state signal of the camera and generate a signal corresponding to the first release of the camera by the detection signal so as not to disassemble the automatic continuous shooting mode selection switch. It is to provide a circuit that allows continuous shooting by a second stage release switch.

Another object of the present invention is to provide a camera circuit that can quickly take a moving subject.

Another object of the present invention is to provide a circuit for enabling continuous shooting by a switch operation without using an auxiliary accessory.

In order to accomplish the above object, the present invention provides an automatic photographing control circuit for a still camera including a main switch, a 1-2 release switch and a magnet, a shutter unit, a motor driver, and a strobe unit, wherein the shutter operation switch and selection of the shutter unit are performed. Logic the switch signal and latch the latch signal by the output of the first signal stage of the motor driver and the stove unit according to the logic signal and latch the latch signal by the output of the first signal stage of the motor driver and the stove unit. First means for generating a signal corresponding to the first release switch by logicalizing a signal by the outputs of the second signal stage of the motor driver and the Stove part, and switching the signal according to the output of the first means; The second means for applying the battery power through the power supply and the second release switch by the power supply according to the operation of the second means And which it is characterized by configured by a third means for driving the magnet to keep the continuous recording.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram according to the present invention, BA is a battery power supply, SO is the main power switch of the camera, S1 is a first release switch that is operated by being connected to the first release button, S2 is connected to the second release button Is a second release switch, S3 is a continuous shooting selector switch, MG is a magnet for electronic release, R1-R7 is a resistor, Q1-Q3 is a transistor, C1 is a capacitor, F / F is a dip-flop, NADl is a NAND gate, NOR1 is a noah gate, SB is a shutter portion, and MD is a motor driver and strobe portion.

The lens cap is open and the main switch SO is turned on. Accordingly, the battery BA is supplied to the node 1, and the resistor R5 and the emitter of the transistor Q1 are connected to the node 1. The first release switch S1 and the continuous shooting selection switch S3 are connected to the node 1, and the continuous shooting selection switch S3 is connected to the input node 2 of the NAND gate NDL. The resistor R8 is connected and grounded from the node 2, the resistor R1 is connected to the first release switch S1, and is connected to the base node 3 of the transistor Q2. The resistor R2 is connected in parallel to the ground from R1), and the shutter operation switching output signal stage STSW is applied to a signal generated according to the operation of the switch SW of the shutter unit SB interlocked with the magnet MG. Is connected to be input to the type force terminal of the NAND gate NDA1, and the output terminal of the NAND gate NAD1 is a flip-flop (F). / F) is connected to the clock terminal (CK), the motor driving signal, such as the film feed of the motor driver and the Stove (MD) is reset to the reset stage (R) of the flip-flop (F / F) It is applied through one output stage (MDTS), the output of the flip-flop (F / F) is connected to the input terminal of the NOR gate (NOR1), the accidental exposure of the motor driver and the Stove (MD) A signal for prevention is connected to a type force terminal of the noah gate NOR1 through a second output terminal 1NH, and an output terminal of the noite NOR1 is coupled to the node 3 through a resistor R3. The ground is connected to the emitter of the transistor Q2 through the resistor R4, the collector of the transistor Q2 is connected to the node 4, and the resistor R5 between the base and the emitter of the transistor Q1. Is connected, and a second release switch S2 is connected to the collector-side node 5 of the frame resistor Q1 to transmit through a resistor R6. The base axis node 6 of Q3 is connected, the resistor R7 is connected to ground from the node 6, and the magnet MG is connected to the collector of the transistor Q3. And a capacitor C1 connected in parallel between the node 7 and ground.

Therefore, if a specific embodiment of the present invention will be described in detail with reference to FIG. 1, first, briefly describe the function of each switch (S0-S4), the main switch (S0) is a main switch for shutting off the battery (BA) power It is linked when the red cap is opened / closed, and is turned on when the lens cap is opened, and turned off when the lens cap is closed.

The first and second release switches S1 and S2 are release switches interlocked with the first and second release buttons of the camera, and the first release switch S1 is turned on while the release button is pressed halfway, and the first release switch S1 2 Release switch (S2) is turned on to operate the camera. The state of the first and second release buttons in the camera can be easily detected by anyone who has used the camera.

Once it is assumed that the lens cap is open, the main switch SO is turned on, so when starting to press the release button to take a picture, the first release switch S1 is turned on, and the battery BA through the main switch S0 is activated. Since power is supplied, transistor Q2 is turned on through resistor R1. At this time, the collector of the transistor Q2 becomes " low " and the transistor Q1 is turned on.

When the transistor Q1 is turned on, the battery BA power through the main switch SO is supplied to each of the shutter unit SB, the motor driver, the strobe unit MD, and the magnet MG. Subsequently, when the second release switch S2 is turned on, the transistor Q3 is turned on by the bias voltages of the resistors R6 and R7 so that the shutter of the shutter SB interlocked with the magnet MG is operated to take a picture. .

Continuous shooting selection normally turns off the continuous shooting selection switch (S3), but in continuous shooting, the continuous shooting selection switch (S3) is in the on position, and the first and second releases are continued until the release button is released. When the switches S1 and S2 are turned on and the outputs of the shutter unit SB, the motor driver and the strobe unit MD, and the continuous shooting selector switch S3 are turned on, the NAND gate NAD1 has a shutter operation switching output stage ( Dependent on the signal of the STSW, the output of the NAND gate NDA1 is opposite to the signal of the shutter-operated switching output stage STSW. This signal is inputted to the clock stage CK of the deflip-flop F / F, and the output stage is latched according to the input of the clock stage CK by latching the state of the data terminal D of the flip-flop F / F. If it occurs at (Q), the transistor is controlled at the second output terminal INH and the NOA gate NOR1 to control the transistor Q2 by driving the resistor R3. In this case, even when the first release switch S1 is turned on, the first release switch S1 is dependent on the output signal of the NOR gate NOR1.

When the transistor Q2 is turned on / off, the power supply is controlled by driving the transistor Q1 to perform continuous shooting while the first and second release switches S1 and S2 are turned on. That is, the shutter of the shutter unit SB is operated by driving the magnet MG by turning on / off the power supply while the first and second release switches S1 and S2 are turned on. When the switch SW is turned on, the shutter operation switch output signal stage STSW becomes " high " and is input to the NAND gate NAD1 so that the output of the NAND gate NAD1 is the clock stage of the flip-flop F / F. CK) clock signal is used.

When the state of the data terminal D is latched by the flip-flop F / F by the clock signal applied to the clock terminal CK, the output terminal Q is converted to " high ", followed by the noar gate NOR1. ) Is also changed to " low " regardless of the state of the second output terminal 1NH to turn off the transistor Q2 and turn off the transistor Q1 to stop the power supply, but the motor drive and strobe part When moving the film from the MD, a "high" signal is generated to the first output terminal MDTS, and the flip-flop F / F is reset to set the output terminal Q to "low" and the second output terminal 1NH. ) Is low, the output of the temporary NOR gate NOR1 is "high" so that the transistor Q2 is turned on and the transistor Q1 is turned on to supply power, thereby driving power through the second release switch S2. The transistor Q3 is turned on to drive the shutter of the shutter unit SB driven in conjunction with the magnet MG. The following is taken automatically cut because of continuous shooting. The switch SW of the shutter unit SB is a switch interlocked with the magnet MG, and is switched on and off according to the operation of the shutter. The switch SW informs whether the shutter is in operation or not.

Hereinafter, the operation of each function of FIG. 1 will turn on the main switch SO in order to take a picture. At this time, even if the main switch SO is turned on, power is not supplied to each part of the circuit. In this case, when the first release switch S1 is turned on, the transistor Q2 is turned on, and then the collector of the transistor Q2 is "low", so that the transistor Q1 is turned on and the battery BA is started to be delivered to each part of the circuit. The second release switch S1 is a switch that is continuously turned on after the first release switch S1 is pressed halfway. When the second release switch S2 is turned on, the transistor Q3 is turned on so that the magnet MG is turned on. The shutter is activated automatically.

Therefore, when the continuous shooting selection switch S3 is set to the on position and the first and second release switches S1 and S2 are pressed, the shutter is operated. When the shutter is activated and the shutter operation switch SW is turned on, the shutter operation signal is output. Become me

Once the shutter of the shutter unit SB is operated, the shutter operation switching output stage STSW is switched from "low" to "high" by switching the switch SW, and this signal is applied to the NAND gate NAD1 and continues. Since the photographing selector switch S3 is turned on, the clock is switched to the clock terminal CK due to the change of the output of the NAND gate NAD1, so that the flip-flop F / F changes the "high" state of the data terminal D. By latching, the output of the output terminal Q goes from "low" to "high". At this time, the NOR gate NOR1 is " low " and the transistor Q2 is turned off. At this time, when the transistor Q1 is turned off, the previous supply power becomes the cutoff door "low", and the shutter part SB, the motor driver and the straw part MD are turned off by the "low" of the power supply.

The motor of the motor driver and the strobe part MD is driven to give a "low" output to the second output terminal INH in order to prevent accidental overexposure of the shutter. This indicates that the motor is being driven when the first output stage (MDTS) becomes “high” while driving the motor for moving the film according to the continuous shooting. This signal resets the deflip-flop (F / F) to output stage (Q). ) Becomes "low". At this time, since the output of the NOA gate NOR1 is “low” and the transistor Q2 is turned off, power supply through the transistor Q1 is stopped, so the first and second release switches S1 and S2 are turned on so that the shutter is not driven. When the film movement is completed and the motor is driven, the first output terminal MDTS becomes “low”. When the flip-flop F / F is returned from the reset, the output terminal Q becomes "high" and the output of the NOA gate NOR1 becomes "high". Since the first and second release buttons are continuously pressed by the continuous shooting, the first and second release switches S1 and S2 are continuously turned on so that the transistor Q2 is turned on and the transistor Q1 is turned on to supply power. When the Q3 is turned on to operate the shutter in conjunction with the magnet MG, the next scene is captured.

Here, the capacitor C1 delays the second release switch S2 signal and the circuit part signal for a predetermined time to prevent an error in circuit operation.

Therefore, when the power level of the second release switch S2 becomes the turn-on voltage of the transistor Q3, the magnet MG is operated and the shutter is operated. Therefore, if the release button is kept pressed, the shutter unit SB and the motor driver and The transistors Q2 and Q1 are turned on / off by the operations of the NAND gate NAD1, the flip-flop F / F, and the noar gate NOR1 by signals generated according to the operation of the strobe unit MD. As in the description, it is repeated and shooting continues.

As described above, it is possible to continue shooting until the continuous shooting switch is released. Therefore, the operation of a moving subject can be taken faster than other cameras. Continuous shooting can be performed by operating the switch without using an auxiliary accessory. There is an advantage that can be operated by connecting.

Claims (1)

A magnet (MG) driving circuit comprising a storage (R6, R7) and a transistor (Q3) from the main switch (SO), the 1-2 release switches (S1, S2) and the second release switch (S2), and a shutter; In the automatic photographing control circuit of a still camera having a shutter unit SB having an operation switch SW, a motor driver having second output terminals INH, MDTS, and a strobe unit MD, the shutter unit SB. Inputs the shutter operation switch SW and the selector switch S3 to the NAND gate NAD1, and connects the output signal of the NAND gate NAD1 to the clock terminal CK of the flip-flop F / F. The first output terminal MDTS of the motor driver and the stove part M1 is connected to the reset terminal R of the flip-flop F / F, and the motor driver and the stove part MD The second signal terminal INH is connected to the input terminal of the NOA gate NOR1, and is connected to the base of the transistor Q2 through the resistor R1 from the first release switch S1, The main switch SO is connected to the emitter of the collector transistor Q1 of the transistor Q2, and the second release switch S2, the magnet MG, and the shutter unit SB are connected to the collector of the transistor Q1. And a motor driver and a strobe unit (MD).