JPS60118815A - Camera - Google Patents

Abstract

PURPOSE:To recognize clearly a fault of a camera by constituting the titled camera so that it is inhibited to shift to the next sequence even when a photographic lens is not moved to a focused position while the detention of the photographic lens is released. CONSTITUTION:This camera is provided with the first detecting means switch S5 for detecting a fact that the detention of a lens is released from a set position of the lens, the second detecting means switch S4 for detecting a fact that the lens is moved to a focused position when a solenoid 42 is driven, and a comparator 22. When a fact that the lens is moved to the focused position is not detected by this second detecting means, and a fact that a detention of the lens is released is detected by the first detecting means, it is inhibited to proceed to the next photographing sequence by a controlling circuit, and an inhibiting means consisting of a timer 31, etc. for inhibiting continuously to proceed to the next photographing sequence by turning off a main switch S2 and executing continuously an electric conduction to the controlling circuit is provided additionally. In such a way, a fault of a camera is recognized clearly.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a camera, particularly a camera that performs autofocus, automatic exposure, and automatic film winding.

Conventional autofocus operation, 1st! In so-called V's shutter cameras, which have the functions of automatic film winding and automatic film winding, the power source is a dry battery, which is commonly used as a training source for the photographer's convenience.

Nuclear power! Release, autofocus operation,
Sequence control is performed in the order of automatic exposure operation and automatic film winding, but during automatic film winding, the power supply voltage decreases due to the load on the film drive motor, so when using a control Tk of one peak c d. There was a fear that the control Tk would malfunction and the sequence operation of the camera would not be performed normally. For this reason, the control Tb that controls the camera sequence is divided into two parts: It, which controls autofocus operation and automatic exposure operation, and T3, which controls automatic winding operation. The second method is to prevent the voltage of the power supply battery from dropping during automatic winding, which is shown in the 70-chart in Figure 2. A method was used in which the power to the Tb, which controls the autofocus function, automatic exposure control function, and automatic winding function, was maintained until all photographic sequences were completed.

Here, Fig. 1 and Fig. 2 show the state of the conventional camera in the south, [LKNSg S'lRT?] is the state that performs the 4-output control operation of the photographing lens, and the [timer] is the state that measures enough time for automatic exposure control. The state 1-'ilt g release is a state in which the power of the control circuit is released, and the state "AW" is a state in which automatic winding is performed. Among the autofocus functions of Josui cameras, the lens drive generally involves a solenoid and a solenoid for releasing the tension of a member that locks the movement of a spring that drives the photographic lens in one direction, for example from close range to infinity. This is done by energizing both solenoids of the solenoid that stops the photographing lens being driven after the tension is released at timings corresponding to distance measurement information.

Therefore, if the above-mentioned autofocus function is disturbed due to a disconnection of the solenoid, etc., in the first method and the second method of VC Josui, the shooting sequence after the will be the heel.

That is, in the first method, if the solenoid that releases the tension of the photographic lens does not operate, the camera cannot proceed to the next sequence, so nothing moves, and the user can recognize that there is a malfunction. However, if the solenoid X that releases the tension of the photographic lens operates normally, but the solenoid that stops the photographic lens does not operate, the autofocus operation will not be completed, and the autofocus operation and auto exposure operation will not be performed. The power control for the It) was stopped to prevent out-of-focus photographs. However, in preparation for the autofocus operation for the next shooting, the shooting lens is released from the lock at the -6 cent position as in normal conditions, so the film is automatically wound to return the shooting lens to the set position. It had a fatal flaw in that the winding continued without exposure.

In addition, in the second method, if the solenoid that releases the tension of the photographic lens does not operate, the camera will not proceed to the next sequence, as in the first method, and nothing will move, and the user will know that there is a malfunction, but the selected lens will not work. If the solenoid that releases the tension of HICh+ operates in the positive direction, and the solenoid that stops the photographic lens does not operate at 9, the photographic lens is released to the cent position. From then on, as if I were a man, I'd go out on my own and dispatch 1'
li A E and automatic winding AW were not performed and the power was turned off 7
``L.1%fj'' As in the case described above, in this type of camera where the taking lens is released from the tension and the taking lens is driven by the force of a spring, if the taking lens is not at the cent position i4, it will take a picture as is. In order to prevent this, the autofocus operation is disabled.In order to prevent this from occurring, each time the release is performed, a check is made to determine whether the photographing lens is in the set position IF or not. When the photographing lens is in the cent position, the camera moves to the next sequence after autofocus movement t'h, and if the photographing lens is not in the set position, it automatically winds up to bring the photographic lens to the set position. Therefore, in a camera that normally performs autofocus operation, automatic exposure control, and automatic winding one after another with a single release operation, the solenoid that releases the tension of the photographic lens operates normally and the camera is able to take a picture. If the solenoid that stops the lens does not operate properly, automatic exposure control and automatic winding will not occur.7
The camera will stop operating, but if you try to release the camera again, it will wind up automatically for the reason mentioned above. When the film is released twice, the film automatically winds up and the camera moves abnormally compared to normal camera operation, but the user tends to think that the film is being filmed because it is able to wind the film, and the film is not being developed. The drawback was that you would realize after taking it out that the film was unexposed.

Also, while preparing for shooting, check for disconnections in the solenoid.
It is possible to solve the above-mentioned drawback by not taking pictures when the wire is broken, but in this case, for example, the driving part of the photographing lens may be clogged with dust, etc.
Although there is no disconnection, it is not possible to detect a failure in which the magnet does not function properly.

In view of the above-mentioned points, the present invention provides a photographic lens with a focus position of 11[J].
It is prohibited to move on to the next sequence even when the camera lens is not tightened and the shooting lens is released.
The aim is to further eliminate the disadvantages of clean water.

The present invention will be described in detail below using the drawings.

Figure 5 is a flowchart showing the sequence of an embodiment of the present invention. As shown in Figure 3, in the present invention, when the photographing lens does not turn back to the in-focus position 1#, K detects whether or not the photographing lens is unlocked.

When the shooting lens is not locked, the camera moves to the next sequence of automatic winding (AW), and when the shooting lens is unlocked, the camera moves to the next sequence of automatic winding (AW). Hold and stop the power supply of the circuit that controls the exposed part [(Aln), and drain the battery.
The watch is configured to proceed to an automatic winding (AV) sequence.

FIG. 4 is a circuit diagram of an embodiment of the present invention. In Figure 4, 1 is the camera's power battery, 2' is a transistor connected to battery 1 and controls the supply of power VCO for the control circuit, 6 is a resistor that limits the base current of transistor 2, and 81 is, for example, a S2 is a switch that is turned on and off in conjunction with opening and closing, etc. S2 is a switch that is turned on and off in conjunction with the first stroke of the release button, and 4 is a switch that allows the camera to perform sequence operations even when switch S1 or switch S2 is off. 5 is a resistor that limits the base current of transistor 40, and 6 and 7 are D-type transistors that determine the operating mode of the camera. A flip-flop, 8, is an AND gate that receives the i output of the D-type flip-flop 6 and the ζ output of the D-type flip-flop 7, and outputs a signal indicating that the camera is in the first operation mode; 9 is a p-type flip flop 6
10 is an AND gate that receives the ζ output of the D-type flip-flop 7 and the ζ output of the D-type flip-flop 7 and outputs a signal indicating that the camera is in the second operation mode. An AND gate which receives the ζ output of the flip-flop 7 and outputs a signal indicating that the camera is in the sixth operation mode; 11 is the ζ of the D-type flip-flop prop 6;
output and the ζ output of the D-type flip-flop 7, and outputs No. 48 indicating that the camera is in the fourth operation mode.The first operation mode is ``release after the camera barrier is opened. The operating mode from when the π1 stroke of the button is pressed until the lateral pressure for automatic focusing is completed, the second operating mode focuses the taking lens and the fifth operating mode completes the exposure of the film. This corresponds to Am shown in FIG. The fourth operation mode is an fth operation mode in which the power is turned off after film exposure. 12 is an OR gate connected to the clock input of the D-type flip 70 tube 6 and outputs a clock for advancing the camera's operating mode; 13ij is connected to the OR gate 12 and outputs a clock for advancing the camera's operating mode from the first operating mode to the second operating mode; AND gate to output, 14 is OR gate 12
15 is connected to the OR gate 12 and outputs a clock for advancing from the second operating mode to the third operating mode; and 15 is connected to the OR gate 12 for outputting a clock for advancing from the third operating mode to the fourth operating mode. Output and all gate days 5
16 is a pull-up resistor connected between the switch 83 and the power supply VCC, 17 is an inverter whose input is the switch S6 and the resistor 16, and 18 is a switch that turns on and off in conjunction with the second stroke of the release button. When the switch S3 is turned on after distance measurement is completed in the first operation mode, a large AND gate outputs a signal to start self-holding of am. 19 is a transistor 4 which is passed through a resistor 5 when the Q output is at H level. An ER type rough flip-flop 20, which flows a base current of A comparator that compares the amount of movement of the photographing lens and the 6111 distance result, 23 is the distance measuring device IT.
It is configured to output an H level signal when the distance is completed. S4 is an AND gate that outputs a pulse indicating the amount of movement of the photographing lens in the second operation mode to the clock input of the counter 21;
A switch that repeats on and off to output a pulse proportional to the amount, 25 is the switch S4 and the power supply yal:! 26 is a pull-up resistor connected between the lens movement i
27 is an inverter that receives the output of the OR gate 26, and 28 stops the photographing lens. Magnet 4, which will be described later, controls the amount of movement of the photographic lens by
29 an AND gate that outputs an energization signal to 2; 29 a clock generation circuit; 50 an AND gate that outputs a clock in the second operation mode, that is, the mode for driving the photographic lens to the in-focus position; 51 a second operation; The above-mentioned timer circuit S5, which measures the mode time and stops counting when a predetermined time elapses, is turned on when the photographing lens is at a predetermined set position and turned off when it starts moving from the set position to the focus position. switch, 32 is switch S5 and electric @
A stone pull-up resistor 55 is connected between VCa and an inverter whose inputs are switch S5 and resistor 52;
Reference numeral 4 denotes an AND gate which performs an AND operation between the output of the timer circuit 31 and the output of the inverter 56, and outputs whether or not the photographing lens is at the set position when the time set in the timer circuit 51 has elapsed. 56 is an inverter connected to the input of the large AND gate 55; 57 is an inverter connected to the input of the large AND gate 55; 57 is an inverter connected to the input of the large AND gate 55; Exposure control circuit that determines exposure time.

3B is a power-up/clear circuit that resets the flip-flop of the circuit by applying an IH force at H level for a predetermined period of time when the power supply VCO is applied; 39 is a power-up/clear circuit that resets the flip-flop of the circuit when the power supply VCO is applied; 39 releases the photographing lens from the set position by passing rtt. 40 is a transistor for energizing the magnet 59; 41 is a resistor for limiting the base current of the transistor 40; 42 is a magnet that stops the photographing lens at the in-focus position when the energization 1 is stopped; 45 is a magnet 42
A transistor for conducting electricity, 44 is a transistor 45
A resistor 45 is included in the shutter mechanism (not shown) and is energized to open the shutter from the trap and close the shutter when the energization is stopped. 46 is the magnet 46 for energizing the magnet 45. , 47 is the base f of the transistor 46
This is a resistance that limits the L flow.

Next, nine works of the embodiment of the present invention constructed as described above will be explained using time charts shown in FIGS. 5, 6, and 7.

Fig. 5 is a time chart showing the sequence in which the camera operates normally, and Fig. 6 is a time chart showing the sequence in which the camera operates normally. Figure 7 is a time chart showing the sequence of operations when the tension of the photographic lens is not released, and shows the second solenoid that continues the movement of the photographic lens even though the tension of the photographic lens has been released. 12 is a time chart showing the sequence of operations when the photographing lens does not move to the in-focus position because the magnet is broken @tb. In FIGS. 5, 6, and 7, (a) is the main switch S1.
(b) is the on/off timing of the first stroke switch S2 of the release button, (C) is the on/off timing of the second stroke switch S5 of the release button, ( d) is the on/off timing of the switch S4, which indicates the amount of movement of the photographic lens; (e) is the on/off timing of the switch S5, which indicates the movement of the photographic lens from the set position; (f) is the circuit voltage fiVo. (+ on/off timing, (g)
is the on/off timing of the transistor 4 indicating the power supply self-holding period, (h) is the distance measurement completion signal output from the distance measurement @ station 25, (1) is the communication signal to the magnet 59 and the magnet 42, fj) is a timer count/amplifier signal output from the timer circuit 31, (k) is an energization signal to the magnet 45, and ('i) is a film winding signal from a winding mechanism (not shown).

First, a sea dance in which the camera 2 operates normally will be described using diagram i5.

When the first stroke of the release button is pressed after a lens barrier (not shown) is opened and the main main 9-01 is turned on, the switch S2 is turned on and the transistor 2 is connected to the resistor 6 and the switch s1. s2'c, the base current flows, and transistor 2 is turned on. As a result, the entire circuit is connected to the power source and is supplied with power. Immediately after the transistor 2 is turned on, the power-up signal circuit 58 outputs an H level signal for a very short time, for example, 10 mθθC, and each of the seven lip-flops is reset. Therefore, the outputs q of D-FIl' 6.7 both go to L level, and the outputs Q of D-FIl' 6.7 both go to H level, so that the output of AND gate 8 goes to H level. When the camera user presses the release button to the second stroke, the inverter 17
The output is at ■level. Further, when the measuring device 23 completes distance measurement, an H level signal is output.

Therefore, the output of AND gate 18 becomes H level and 5
The R-FF 19 is set, the output Q is at H level, and the transistor 4 is turned on. The transistor 4 is turned on until the rounding 5R-FF19 is reset and the output Q is inverted to the H level or 1-)L level, and when the user releases the camera's release button, the switch S2, which is linked to the first stroke, is turned on. Even when turned off, transistor 2 remains on and the circuit is connected to the power supply.

Also, since the output of AND gate 8 is at H level, 5R-
At the same time as FF19 is set, the output of AND gate 15 becomes H level, the clock input of D-FF6 is inverted from L level to H level, D-FF6 is set, and the output Q changes from L level to H level. , the output Q is inverted from H level to L level. Therefore, AND gate 8 is inverted from H level to L level, AND gate 9 is inverted from L level to H level, and the camera enters the second operation mode. At the same time, the output of the AND gate 16 also becomes L level. Furthermore, before the photographing lens is moved i#, the output of the comparator 22 is at the L level, so the output of the inverter 27 is at the H level via the OR gate 26. Therefore, the output of the AND gate 28 is inverted from the L level to the H level, the transistor 40 is turned on, the magnet 59 is conductive, and the photographing lens is tightened or released. At this time switch S
5 switches from the on state to the off state. On the other hand, when the output of the AND gate 2B becomes low level, the base current flows to the transistor 43 through the resistor 44, and the transistor 4
3 is turned on, and the magnet 42 is energized. While the magnet 42 is energized, the photographing lens continues to be moved from the set position by a mechanism not shown. At this time, the switch S4 is turned on and off repeatedly as the photographing lens moves, so the output of the AND gate 24 returns between the L level and the H level. Normally, chattering occurs when the switch S4 is turned on and off, so it is desirable to connect a chatter-linda absorption circuit to the output of the AND narrow gate 24. The clock input of the counter 21 has an AND processing gate 24.
Since the output of the counter 21 is connected to the switch S
The amount of movement of the photographing lens is output by counting the number of times the lens is turned on and off. The output of the comparator 22 is
7tl? at which the distance measurement result outputted from the counter 21 and the position of the photographing lens outputted from the counter 21 are equal? lc Changes from L level to H level. At this time, the output of the OR gate 26 is also at H level, and the output of the inverter 27 is at L level, so the output of the AND gate 28 is at L level. Therefore, since transistor 40 and transistor 45 are turned off, magnet 59 and magnet 4
2 Turn off the power. When A'fl of the magnet 42 is stopped, the movement of the photographing lens is stopped by a mechanism (not shown), so that the photographing lens stops at the in-focus position.

On the other hand, when the output of the converter 22 becomes H level, the outputs of the AND gates 1 and 4 also become H level, and the OR gate 1
Since the output of 2 changes from L level to H level, Cl-
The Q output of FF 6 becomes L level and the q output becomes R level. Therefore, the Q output of D-FF7 becomes H level and the Q output becomes L level. Therefore, the output of AND gate 9 is L
Since the output of the AND gate 10 becomes H level, the camera enters the third operation mode for film exposure. The output of the exposure control circuit 37 is "L" until the output of the exposure control circuit 37 outputs an H level signal as a signal for ending film exposure.The output of the inverter 66 is at the H level. When the output of AND gate 10 becomes H level, AND gate 55
Since the output reaches the lid level, a base current flows into the transistor 46 through the resistors 4 and 7, so the transistor 46 is turned on and the magnet 45 is energized. When the magnet 45 is energized, the shutter starts opening by the h mechanism (not shown), and the exposure control circuit 57 starts operating, and when the exposure person to the film becomes appropriate, the output becomes L.
Change from level to H level. At the same time, the output of the inverter 36 changes from the H level to the L level, so the output of the AND gate 55 also goes to the L level, the transistor 46 is turned off, the energization of the shimagnet 45 is stopped, and the shutter is closed by a mechanism not shown. . On the other hand, exposure control circuit 37
When the output of the AND gate 15 becomes H level, the output of the OR gate 12 changes from L level to H level. Therefore, both outputs of D-FF 6 change from H level to L level. , 9Q output goes from L level to H
become the level.

Since the clock input of I)-FF 7 becomes H level or l-1L level, the output does not change. therefore and)
, the output of the gate 10 goes from the U level to the L level, and the output of the AND gate 11 goes from the L level to the H level, so the camera enters the fourth operation mode in which the power is released from being held. When the output of AND gate 11 becomes H level, the output of OR gate 20 also becomes H level, so SR-'F
F19 and transistor 4 turn off &q. At this time, switch S2, which is linked to the first stroke of the release button, is off, so transistor 2 has a base voltage f) IE
Since the current no longer flows, transistor 2 is turned off and the circuit is disconnected from the power supply. At this time, S5 is off, and as a result, the control circuit (not shown) that controls winding is driven, the film is wound one frame, and the photographing lens is charged to a predetermined set position by the 487yl (not shown), and the switch is turned off. It stops when the screw 65 is turned on.

The sequence operation of the camera in the case where the Ususugi lens is not driven from the set position due to the magnet 59 breaking will be described with reference to the timing chart of FIG. 3.

The steps from the first operation to the second operation mode are the same as in the normal case described above, so a description thereof will be omitted. In the operation mode of M2, as described above, the AND winter gate 2B goes to H level and the transistor 40 and transistor 1 45 are turned on, but if the magnet 59 is disconnected, the photographing lens will not move from the set position, so the switch B5 will be turned on. The switch s4H remains in the off state. Therefore, since the counter 21 does not count at all, the output of the comparator 22 remains at the L level. On the other hand, in the second operation mode, since the output of the AND gate 9 is at H level, the timer 51 continues to count the pulses of the a-check generating circuit 29. Tie 1-51 is for a predetermined time, e.g. 20
After counting the pulses corresponding to 0m6ec, an H level signal is output, so the output of the OR gate 26 also becomes H level, and a B level signal is applied to the base of the transistor 40.45 via the inverter 27.
45 is turned off, and the energization of magnets 59 and 42 is stopped.

Also, since the switch S5 is in the on state, the output of the inverter 55 is at H level, and the output of the timer 51 is at H level.
When the level is inverted, the output of the AND gate 24 is inverted from L level to H level. Then, the 5R-FF is reset through the OR gate 20, and the Q output is inverted from H level to L level. As a result, the transistor 4 turns from on to off 9, and the transistor 2 also turns from on to off, cutting off the connection between the ML source and the circuit. However, unlike the normal case, since S5 remains on, the winding mechanism (not shown) is not driven. Here, even if Michikage turns off the transistor 2 by turning off the switch S1 or S2, and then turns on the switch S1 and S2 again to supply power to the circuit, the autofocus will still work. Automatic winding does not occur, the camera does not operate at all, and the photographer always notices that there is an abnormality, and does not proceed with shooting without noticing it.

Next, regarding the sequence operation of the camera in the case where, even though the photographic lens has been unfastened from the set position and has started moving, the movement of the round photographic lens cannot continue and has stopped because the magnet 42 is broken, for example. This will be explained using FIG. Since the process from the first operation mode to the second operation mode is the same as that described above, the explanation will be omitted.

In the second operation mode, as described above, the AND gate 2 becomes H level, and the transistors 40 and 45 are turned on. When the transistor 40 is turned on and the magnet 59 is energized, the photographing lens starts moving from the cent position as described above, and the switch S is turned on.
5 is off. However, since the magnet 42 is disconnected, the photographing lens is immediately stopped even if the transistor 45 is turned on, so the switch S4 remains off. Therefore, the count of the counter 21 does not advance, so the output of the comparator 22 is at L level! In summary, the output of the timer circuit 51 becomes H level after a predetermined time, so the transistors 40 and 43 are turned off.

At this time, switch S5 is off, so inverter 55
The output of 9. is L level. Since the output of the AND gate 54 is at L level, the SR type rough flip 70 knob is not reset. Since the output of the comparator 22 remains at the L level, the output from the RND gate 14 also remains at the L level! ft.
Therefore, since no clock is input to the D-type flip 70 tube 6, the operation mode does not proceed. In this case, even if your finger is released from the release button and switch S2 is turned off, the Q output of the SR type frizzo flop remains at the H level, so transistor 4 remains on and transistor 2 also remains on at 4 degrees. Become. Therefore, switch S5 is 4
'However, since the winding circuit is configured not to wind the camera while the power source VaC is outputting Jt, the camera will not move at all. Also, the main
Even if the switch S1 is turned off by closing the barrier, the dose line transistor 2 in which the transistor 4 is turned on also remains in the on state 11111, and the power supply of the control circuit is maintained.

Therefore, as in the first conventional method described above, the power to the control circuit that performs autofocus operation and automatic exposure control is turned off, thereby preventing the film from being wound unexposed. The film is automatically advanced by pressing the shutter release button twice, as in the above method, so the user does not notice that there is a malfunction, and the scene sequence remains stopped, allowing the user to continue using the camera. It is clearly possible to recognize that a failure has occurred.

When the photographer replaces the 'Ilt'R battery, the camera moves to the automatic winding sequence, and the automatic winding circuit (not shown) is energized to wind the film, and when the release is performed again, the next shooting sequence begins. Ru.

In addition, in this embodiment, by stopping the self-holding of the circuit that performs autofocus operation and automatic exposure control,
Although the present invention has been applied to a camera using the above-mentioned conventional method 1 in which automatic winding is started, it is also applicable to a camera using the above-mentioned conventional method 2. Of course. In this camera, the distance measuring operation starts when the first stroke of the release button is turned on, and the distance measuring operation starts when the second stroke of the release button is turned on. The autofocus operation was performed to start controlling the position of the photographing lens based on the obtained results, but when the 42nd stroke of the release button was turned on, the photographing lens began to be driven and the distance measurement operation was started. The present invention can also be applied to cameras equipped with a so-called scanning type autofocus device, which stops driving the photographic lens once the process is completed.

, f In this embodiment, 7. A switch S5 is used as a first detection means for detecting that the photographic lens is released from the set position, and a second detection means for detecting that the photographic lens is in the in-focus position is set according to the movement of the photographic lens. It is composed of a switch S4 that repeats on and off, a counter 21, a comparator 22, and a distance measuring device fIt25, and when the photographing lens does not move to the in-focus position by the second detection means, the first detection failure occurs. When detecting that the photographing lens is released, the main type is a flip-flop 19 and a transistor 2.4.

As described above, the present invention includes a main switch that is turned on in conjunction with the shutter button when shooting starts, a first solenoid that releases the shooting lens from being locked in the set position, and a first solenoid that releases the shooting lens from the set position. Electric power is supplied by the main switch and the solenoid 42 whose energization is controlled in order to stop the photographic lens which has started moving by the movement of the photographing lens and perform automatic focusing. In a camera having a control circuit that controls energization of a $2 solenoid and controls self-f/hvs output, a first detection detects that the photographing lens is released from the set position 71; and the second solenoid is driven.
a second detection means for detecting that the photographic lens has moved to the in-focus position; and a second detection means for detecting that the photographic lens has moved to the in-focus position; The detection means detects that the photographing lens is unlocked,
When it is detected that the photographing sequence has occurred, the control circuit prohibits proceeding to the next photographing sequence, turns off the main switch, and continues to notify the control circuit. Since it is equipped with a prohibition means that continues to prohibit the operation, the second solenoid may be disconnected as in conventional cameras.Even if the second solenoid is not disconnected, the photographic lens may not be driven to the in-focus position due to some reason such as clogged with dust. 5 When K, the user is deceased! This is very effective because the camera operation is completely stopped without a clear call and without continuing to take pictures, allowing the user to immediately recognize that there is a malfunction.

[Brief explanation of drawings]

1 and 2 are flowcharts showing the sequence of a conventional camera, FIG. 3 is a flowchart showing the sequence of an embodiment of the present invention, and FIG. 4 is a circuit diagram of an embodiment of the present invention. Figure 5 is a time chart showing the sequence when the camera is operating normally, Figure 6 is a time chart showing the sequence when the shooting lens is not released and Figure 7 is the sequence when the shooting lens is not released. 12 is a time chart showing a sequence in a case where the tension is released but the photographing lens does not move to the in-focus position.

Claims (1)

[Claims] A main switch that is turned on in conjunction with the shutter button when shooting starts, a first solenoid that releases the photographic lens from being locked in the set position, and a first solenoid that starts moving when the shooting lens is released from the set position. Power is supplied to a second solenoid whose energization is controlled to stop the imaging lens and perform automatic focusing, and the main switch to control the energization of the first and second solenoids and perform automatic exposure operation. 41 detecting means for detecting that the photographing lens is unlocked from the set position, and a control circuit for detecting that the photographing lens is activated by driving the second solenoid. a second detection means for detecting that the imaging lens has moved to the in-focus position; Lens staff +
h When it is detected that 2>1 has been released, the control circuit prohibits proceeding to the next #1 shadow sequence, turns off the main switch, and continues to energize the previous control circuit to proceed to the next step. 1. A camera comprising: a prohibiting means for continuously prohibiting proceeding to the photographing sequence.