JPH058588Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention includes a battery and a powered circuit that operates by receiving power from the battery, and the powered circuit operates in response to a start signal. This invention relates to a camera that starts operating from an initial state and transitions to another state as the operation progresses.

[Conventional technology and its problems]

Conventionally, in some cameras of this type, when the power supply is cut off due to battery replacement, the power-supplied circuit becomes unstable, and this circuit no longer operates as expected after the battery is replaced.

Therefore, an object of the present invention is to provide a camera in which the powered circuit operates as expected even after battery replacement.

[Means for solving problems]

The configuration for achieving this purpose is as follows, with the reference numerals of an embodiment of the present invention attached.

The powered circuit C1 has a battery 103 and a powered circuit C1 that operates by receiving power from the battery 103. A camera including a response circuit Q5 that responds to charging of the battery, further comprising a switch means SW5 that short-circuits the capacitor C1 in response to the battery replacement operation, and the switch means sets the capacitor to the discharge state. a setting means SW that enables the capacitor to be charged and the response circuit to operate;
5, 100, and 101 is adopted.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the camera of this embodiment as seen from the front (lens side), showing a state in which the back cover (not shown) is closed and the shutter charge is completed.

The back cover interlocking plate 1 includes a plate 2 extending in the front and back direction of the camera.
It has two long holes. Pins 2 and 3 erected on the camera body pass through both elongated holes, thereby allowing the interlocking plate 1 to slide in the front and back direction.
The interlocking plate 1 is biased toward the back (backward) of the camera by a spring 4, but when the back cover is closed, it is held in the front (front) position due to interference from the back cover as shown in the figure. When the camera back is opened, the interference is removed and the lens is displaced backwards. Pins 1a and 1b are erected on one end and the middle of the interlocking plate 1, respectively. A first idle feed lever 5 is swingably supported on the pin 1a at its right end. The lever 5
is biased in the counterclockwise direction by a spring 6. The pin 1b comes into contact with the intermediate portion of the lever 5 when the interlocking plate 1 is displaced when the back cover is opened. Therefore, when the back cover is opened, the lever 5 moves rearward together with the interlocking plate 1, and is rotated to the right by the pin 1b against the biasing force of the spring 6. An upright portion 5a is provided in the middle of the lever 5, and as shown in the figure, the upright portion 5a is formed when the camera back is closed.
A is pressed against the outer circumference of the film counter plate 7 by the biasing force of the spring 6. The counter plate 7 is biased in the clockwise direction by a spring (not shown).
As the film is advanced one frame at a time, it rotates to the left by a constant angle against the urging force. A protrusion 7a is provided on the outer periphery of the counter plate 7 over a predetermined angle.
This protrusion 7a defines the period of the idle feeding operation. As the back cover is opened, the upright portion 5a rotates to the right and separates from the outer periphery of the counter plate 7. Along with that,
When the counter mechanism (not shown) is unlocked, the counter plate 7 is rotated to the right by the biasing force of the spring.
It stops when the protruding portion 7a and the vertically bent portion 5a face each other. The first idle feed lever 5 has a pin 5 at the left end.
b has a bent portion 5c at its free end. When the back cover is opened, the pin 5b rotates to the right and presses the movable piece of the switch SW1, turning it on. switch
When SW1 is turned on, the timer circuit becomes inactive. This timer circuit regulates the energization time to the film winding motor within a predetermined time, and the motor is energized when the motor is stopped due to overload, such as when all film winding is completed. Prevent it from getting stuck.

A second idle feed lever 8 is swingably supported on the pin 2 . The left end of the lever 8 has a downwardly extending portion 8a.
is provided, and the lever 8 as a whole is biased in the clockwise direction by a spring 9 applied thereto. This biasing force causes the lower extending portion 8a to close the changeover switch SW.
It can come into contact with the second movable piece. However, when the interlocking plate 1 moves backward with the opening of the back cover, the right end of the second idle feed lever 8 is pressed by the upright portion 1c provided in the middle of the interlocking plate 1, and the biasing force of the spring 9 Rotate to the left against. Further, as the first idle feed lever 5 rotates to the left, the bent portion 5c presses the downwardly extending portion 8a, and the second idle feed lever 8 rotates to the left.

The release plate 10 extends in the vertical direction of the camera 2.
It has two long holes. Two pins 11 and 12 implanted in the camera body pass through both elongated holes, so that the release plate 10 can be slid in the vertical direction. The release plate 10 has a spring 1
3, the release plate 10 is normally at the upper limit position as shown in the figure, but when a release button (not shown) is pressed, the release plate 10 moves downward. A protrusion 10a is provided in the middle of the release plate 10. A left end 14a of the release lever 14 projects into the movement path of the projection 10a. The lever 14 is pivotally supported by the camera body, and biased by a spring 15 in the clockwise rotation direction. Further, the lever 14 has a bent portion 14b, and the bent portion 14b locks a protrusion 16a of the shutter/charge plate 16. The charge plate 16 has two elongated holes extending in the left-right direction of the camera. The figure only shows the elongated holes through which the pins have passed, and similar pins have also penetrated into elongated holes (not shown). This allows the charge plate 16 to slide in the left and right directions of the camera. The charge plate 16 has a spring 1
7, the charge plate 1 is biased to the left by the bending portion 14b against this biasing force.
6 is shown locked in the right position. At this time, charging of the shutter mechanism (not shown) has been completed. The shutter mechanism is a charge plate 1
6 moves to the left position, the release is released and the exposure operation begins.

As the release plate 10 moves downward, the protrusion 10
The release lever 14 is pressed by the left end 14a and rotates to the left. Along with this, the bent portion 14b
releases the charge plate 16.

The release plate 18 is slidable in the left-right direction through two elongated holes and two pins inserted into each hole, and is urged leftward by a spring 19. An upright portion 18a provided at the right end can engage with a bent portion 16b of the charge plate 16. When the charge plate 16 is in the shutter/charge position as shown in FIG. 1, the bent portion 16b holds the release plate 18 in the right position against the urging force of the spring 19. As the release plate 10 moves downward, the charge plate 16 moves to the left, so the release plate 1 is moved by the bent portion 16b.
8 is released, but release plate 1 is released instead.
The first bent portion 10b of 0 is the rising portion 18 of the release plate 18.
Since the distal end portion 18b of the distal end portion 18a is opposed to the left side, the leftward movement of the release plate 18 is still prevented. Release plate 1
0 is locked and held in the lower position until the exposure is completed by a mechanism not shown, and after the exposure is completed, the lock is released and returns to the upper position. Accordingly, the locking of the release plate 18 by the first bent portion 10b is released, and the release plate 18 moves to the left. At this time, the tip portion 18b is located directly below the first bent portion 10b of the release plate 10, and prevents the release plate 10 from moving downward. Release plate 18
During the movement path of the left end portion 18c, the locking lever 2
There is a right end portion 20a of 0. The locking lever 20 is pivotably supported by a pin of the camera body, and has a vertically bent portion 20b in the middle. The locking lever 20 has a spring 2
Although the release plate 18 is biased in the left rotation direction by
As it moves leftward, the left end 18c presses the right end 20a, causing it to rotate to the right. First start lever 22
is pivotally supported by the camera body, and biased in the clockwise rotation direction by a spring 23. As shown in the figure, the vertical bending portion 20b resists this biasing force to
Locks the right rotation of the lever 22. The second start lever 24 is pivotably supported by the camera body, and is rotated to the right by being pressed by its upright portion 22a as the first start lever 22 rotates to the right. The second start lever 24 has a protrusion 24a, and as the lever 24 swings, the protrusion 24a interferes with the movable piece of the changeover switch SW2 to switch the switch SW2. The switch SW2 can be selectively switched between the a terminal side for stopping the motor and the b terminal side for starting the motor.
figure).

The cam plate 25 is driven by a motor (not shown) and has a large cam portion 25a and a small cam portion 25b. The large cam portion 25a is the second start lever 2
It slides into contact with the outer circumferential part of 4 and rotates as a result. The small cam portion 25b comes into sliding contact with a roller portion 26a provided at one end of the set lever 26. The set lever 26 is pivotably supported by the camera body, is biased in the clockwise direction by a spring (not shown), and is rotated by the small cam portion 25b.
A pin 26 is provided on the lower surface of the other end 26b of the lever 26.
The shutter charge plate 16 and the release lock plate 27 are located in the swing path of the other end 26b. The release lock plate 27 is capable of reciprocating in the left-right direction of the camera by a sliding mechanism similar to that of the shutter/charge plate 16, and is urged leftward by a spring 28. Each of the charge plate 16 and the lock plate 27 is displaced from the left position to the right position by the other end 26b and the pin 26c as the lever 26 rotates to the left. Set lever 2
6 rotates to the left, its one end 26d engages with the upright portion 22a of the first start lever 22, causing the first start lever 22 to rotate to the left. Lock plate 27
has a bent portion 27a, and a pin 27b is planted on the upper surface of the bent portion 27a. When the lock plate 27 is in the right position, the bent portion 27a is located on the release plate 1.
0, and prevents the release plate 10 from being pressed down. The pin 27b is engageable with an arm portion 8b extending from the right end of the lever 8,
When the lock plate 27 is in the left position, the arm portion 8b
and the arm portion 8b when in the right position.
can be engaged with the right side surface 8d.

Next, the operation of this embodiment will be explained with reference to FIG. 1 and FIGS. 2 to 6, which are partial plan views thereof.

When you open the back cover from the state shown in Figure 1, the back cover interlocking plate 1 appears.
and the first idle feed lever 5 are displaced rearward. 1st
The idle feed lever 5 is also rotated to the right by the pin 1b.
As a result, the upright portion 5a separates from the outer peripheral portion of the counter plate 7. At the same time, the counter plate 7 rotates to the right, and as shown in FIG.
a is opposite. At this time, the display of a film counter (not shown) is reset. As shown in FIG. 2, at this time the pin 5b presses the movable piece of the switch SW1 to turn on the switch SW1. This causes the aforementioned timer circuit to become inactive. Therefore, even if you accidentally press the sprocket with your hand when opening the back cover, the timer circuit will not work and cut off the power to the motor.

When the back cover is opened, the vertical part 1c of the interlocking plate 1 moves to the second position.
The idle feed lever 8 is rotated to the left so that the lower extending portion 8a cannot come into contact with the movable piece of the switch SW2. Therefore, the switch SW2 is the second start lever 2.
Controlled only by 4.

When a film is loaded and the back cover is closed, the interlocking plate 1 is displaced forward as shown in FIG. Accordingly, the second idle feed lever 8 rotates to the right, and the tip end surface 8c comes into contact with the pin 27b as shown in FIG. Further, as shown in FIG. 4, the upright portion 5a of the first idle feed lever 5 comes into contact with the circumferential surface of the protruding portion 7a of the counter plate 7. At this time, switch SW1 is still in the on state. Therefore, the above-mentioned timer circuit remains inactive even during the subsequent idle feeding operation.

To start the blank feed operation, press the release button. When the release plate 10 moves downward, the release lever 14 rotates to the left, and the shutter charge plate 16 moves to the left. When a shutter mechanism (not shown) is activated and exposure for one frame is completed, the release plate 10 returns upward. As a result, the release plate 18 is released from the lock by the first bent portion 10b and moves to the left, and the tip portion 18b prevents the release plate 10 from moving downward, and the left end portion 18c locks the locking lever 20. Rotate to the right.
The first start lever 22 is released from the lock by the vertical portion 20b and rotates to the right, and the second start lever 24 is rotated to the right by the vertical portion 22a. As shown in FIG. 5, the second start lever 24 contacts the movable piece of the switch SW2 and switches it to the b terminal side (FIG. 8) for starting the motor.

The motor starts and the cam plate 25 starts rotating to the right.
The set lever 26 is rotated to the left by the small cam portion 25b, and the pin 26c is connected to the charge plate 16 and the release plate 18.
move to the right. As a result, the shutter (not shown) is charged. Since the protruding portion 16a is locked by the bent portion 14b, the shutter/charge plate 16 and the release plate 18 are both held at the shutter/charge position. Further, the upright portion 22a is rotated to the left by one end 26d of the set lever 26, returning to the locked state shown in FIG. However, the second start lever 24 is connected to the large cam portion 25a of the cam plate 25.
Since it is held in the clockwise rotation state, changeover switch SW2
is still held on the b terminal side. The motor therefore continues to rotate. By moving the release plate 18 to the right, the release plate 10 is no longer prevented from being pressed down by the tip 18b, but the release lock plate 27 is moved to the right by the other end 26b, so the bent portion 27a is folded into the second fold. The release plate 10 is located directly below the portion 10c.
prevent downward movement of As a result, shutter release is still impossible during idle feed.

The second idle feed lever 8, which was locked by the pin 27b, is released from the lock by the rightward movement of the lock plate 27 and rotates to the right. The lower extending portion 8a is a changeover switch.
Press the movable piece of SW2 towards the b terminal side. At this time, the changeover switch SW2 is already held on the b terminal side by the second start lever 24, so
There is no change in the status of switch SW2. When the motor continues to rotate and one rotation, that is, one frame's worth of film feeding is completed, each part returns to the state shown in FIG. At this time, the second start lever 24
It rotates to the left following the small diameter part of 5a, and the switch
Move away from the movable piece of SW2. But switch SW
2 is held on the b terminal side by the downwardly extending portion 8a. Therefore, the idle feed operation continues. This state is the sixth
As shown in the figure, the right side surface 8d is maintained while blocking leftward movement of the pin 27b.

When a predetermined amount of idle feeding is performed, the vertical portion 5a falls from the protruding portion 7a to the small diameter portion. This allows the first
The idle feed lever 5 rotates to the left, and the pin 5b switches
Move away from the movable piece of SW1 and turn it off. Further, the bent portion 5c at the free end of the lever 5 is formed by a downwardly extending portion 8.
Press a to rotate the second idle feed lever 8 to the left. The downwardly extending portion 8a is separated from the movable piece of the switch SW2 and no longer interferes with the switch SW2. At this time, the protrusion 7a of the counter plate 7 is set so that it is still in the middle of winding.
2 is a second shaft rotated to the right by the large cam portion 25a.
It is switched to the b terminal side by the start lever 24. As the first idle feed lever 5 rotates to the left, the second
The pin 27b is unlocked by the right side surface 8d of the empty feed lever 8, but while the second start lever 24 is interfering with the switch SW2, the set lever 26 moves the release lock plate 27 to the right position. The release plate 10 is being moved, and downward movement of the release plate 10 is prevented. As the cam plate 25 returns to the position shown in FIG. 1, the set lever 26 rotates to the right to the position shown in FIG. Release lock plate 2
7 moves to the left following this set lever 26, and locks the release lock, that is, the release plate 1.
Remove the downward movement block of 0. The second start lever 24 also rotates to the left following the large cam portion 25a, returning to the state shown in the figure. At this time, switch SW2
The push by the start lever 24 is released and the motor returns to the a terminal side (FIG. 8), thereby stopping the motor. With this, the idle feed operation is completed.

Thereafter, the normal winding operation, that is, each time the release button is pressed, the exposure and winding operations for one frame are repeated.
This operation mostly overlaps with the above-mentioned idle feed operation, so a detailed explanation will be avoided.

When the release button is pressed from the standby state shown in FIG. 1, the release plate 10 is lowered and the release lever 14 is rotated to the left. The shutter charge plate 16 is displaced to the left and exposure is performed. As the release plate 10 rises after exposure is completed, the release plate 18 moves to the left and the locking lever 20 rotates to the right. Both start levers 22 and 24 turn to the right and the switch SW
2 is switched to the b terminal side. The motor starts and winds up one frame of film. During normal winding, switch SW2 is the second start lever 2.
Controlled only by 4. Small cam part 25b accompanying winding
Following the clockwise rotation of the set lever 26, the set lever 26 rotates to the left.
Accordingly, the charge plate 16 and the release plate 18 are displaced to the right. At this time, the release lock plate 27 is also displaced to the right by the set lever 26, prohibiting the release plate 10 from lowering during film winding. When the film winding is completed, the second start lever 24 is rotated to the left by the large cam portion 25a and the switch SW is turned.
Switch 2 to the a terminal side and stop the motor. Each part returns to the standby state shown in FIG.

Next, the rewinding operation will be explained.

FIG. 7 is a perspective view showing the rewinding mechanism. In the figure, first, push up the button 50a fixed to the lower end of the sprocket shaft 50. As a result, the engagement between the sprocket shaft 50 and the sprocket 51 is released, and the two parts, which have been integral with each other in the direction of rotation, become unrelated. This raised state of the sprocket shaft 50 is maintained by the right end portion of the holding lever 52 rotating counterclockwise and falling into the circumferential groove 50b of the sprocket shaft 50 by the biasing force of the spring 53. As the lever 52 rotates to the left, the changeover switch SW3, which has a contact piece on the lever 52, switches to the rewind mode. Further, the left end of the lever 52 is connected to a pressing lever 54.
Press the lower end 54a of to rotate it to the left. The upper end bent portion 54b of the lever 54 is connected to the switch SW2.
Press the movable piece to hold it on the b terminal side.
This is to ensure that the switch SW2 is always on the b terminal side since it is not known where the film winding operation will end at the final end of the film winding. When the switch SW2 is set to the b terminal side, the motor rotates in reverse, driving a rewinding mechanism (not shown) to rewind the film into the cartridge. When the film is rewound until the leading edge faces the photographing aperture, a film presence/absence detection switch, which will be described later, is activated to stop the motor. This completes the rewinding operation.

When the back cover is opened to take out the photographed film, the protrusion 55 that moves in conjunction with this moves backward. The right end bent portion 56a of the back cover lever 56 follows the protrusion 55 and rotates to the left according to the biasing force of the spring 57. The left end bent portion 56b of the back cover lever 56 is connected to the holding lever 52.
The right end portion 52a of the shaft contacts the right end portion 52a of the shaft and rotates it to the right.
Accordingly, the right end portion 52a disengages from the circumferential groove 50b. The sprocket shaft 50 descends and returns to engagement with the sprocket 51. Holding lever 5
2, the switch SW3 returns to the normal rotation position, and the motor is started to perform the hoisting operation until each part is in the standby state shown in FIG.

FIG. 8 shows the electric circuit of this embodiment.
A motor drive circuit is composed of a motor M, switches SW2, SW3, and SW5, transistors Q1 to Q3, a diode D1, a capacitor C1, and resistors R1 to R4. The drive circuit starts and stops motor M according to the switching of switch SW2, and
The rotation direction of the motor M is reversed in response to switching of SW3. As mentioned above, the switch SW4 is turned on when the film is near the photographing aperture and turned off when the film is not near the photographing aperture, and is involved in the automatic stop at the end of film rewinding. This switch SW4 is provided, for example, near the film rail surface.

A latch circuit is constructed from transistors Q4 and Q5, diode D2, resistors R5, R6, R7, and R8, and capacitor C2. The latch circuit is activated by the charging current of the trigger capacitor C1 that flows in response to switching of switch SW2 to the b terminal side in the drive circuit, and keeps the drive circuit in an operating state even if there is no charging current thereafter. .

A timer circuit is composed of transistors Q6 to Q8, varistor D3, capacitors C3 and C4, and resistors R9 to R15. The timer circuit disables the latch circuit and the motor drive circuit when the motor drive time exceeds a predetermined time. As a result, the power supply to the motor M is automatically cut off after the entire film has been wound.

Next, the operation of the electric circuit will be explained.

After loading the film, press switch 1 with the camera back closed.
is on, switch SW2 is connected to the A terminal side, switch SW3 is connected to the W terminal side, switch SW4 is connected to the W terminal side.
is on and switch SW5 is off. When the exposure is completed as described above and the release plate 10 is raised, the switch SW2 switches from the a terminal side to the b terminal side. Accordingly, the charging current of the trigger capacitor C1 becomes the base current of the transistor Q5, which turns on. When transistor Q5 is turned on, its collector current becomes the base current of transistor Q4, which turns on. This forms a positive feedback loop, so that even if the charging current of capacitor C1 decreases, transistors Q4 and Q5 remain on. When transistor Q4 is turned on, the base of transistor Q1 is connected to resistor R4, the collector/emitter of transistor Q4, and the switch.
It is pulled to the negative side of battery E through the B terminal side of SW2 and the W terminal side of switch SW3, and is turned on.
The motor M receives power through the transistor Q1 and starts, and the film starts to be fed. When the film is wound up by a predetermined amount, the switch SW2 is connected to the a terminal side, and the transistor Q4 is turned off, and at the same time both terminals of the motor M are short-circuited, so that the motor suddenly stops.

After the empty feed is completed, the switch SW1 is turned off and the timer circuit becomes operational. The trigger capacitor C1 is once charged because it is turned on together with the transistor Q5, but the diode D is charged during film winding.
2. Discharged through transistor Q4 in preparation for the next normal winding.

In the normal winding operation, when the switch SW2 is switched from the a terminal to the b terminal side as the release plate returns to the upward position after completion of exposure, the motor M is activated in the same manner as during idle feeding. When the winding of one frame of film is completed, the switch SW2 is switched from the B terminal side to the A terminal side, and the motor suddenly stops. When the above operation is repeated and the entire film is wound up, the timer circuit is activated and the motor is automatically stopped.

Next, the operation of the timer circuit will be explained.

Charging of the timer capacitor C4 of the timer circuit is started simultaneously with the start of film winding (that is, when transistor Q5 is turned on) via resistors R14, R15, resistor R11, the emitter-base of transistor Q8, and resistor R15. At this time, transistors Q8 and Q7 are both turned on, and transistor Q6 is turned off. When all the films have been wound, the motor becomes unable to rotate in the middle of winding one frame even though it is energized. As time elapses, the charging voltage of the timer capacitor C4 increases and the base current of the transistor Q8 decreases, and when a predetermined time elapses, the transistors Q8 and Q7 are turned off and the transistor Q6 is turned on. This turns off transistors Q4 and Q1, and motor M automatically stops.

The predetermined time of this timer circuit is set to be longer than the time required to wind one frame of film. Therefore, when winding one frame, the motor M is stopped by switching the switch SW2 of the second start lever 24 to the a terminal side before a predetermined time has elapsed, so that the timer circuit does not operate.

Timer capacitor C4 is connected to diode D4, switches SW2 and SW3 when the motor is short-circuited, that is, when switch SW2 is switched to the a terminal side.
The discharge is reset via the .

Next, the function of the integrating circuit consisting of resistor R9 and capacitor C3 will be explained. When the transistor Q4 is turned off by the operation of the timer circuit, the transistor Q5 is temporarily turned off. But diode D
Transistor Q5 is turned on again because trigger capacitor C1, which had been discharged during winding through resistors R5 and R6, is recharged through resistors R5 and R6.

Capacitor C3 keeps transistor Q6 on and transistor Q4 off due to its charged potential, thereby preventing the motor from restarting.

The varistor D3 produces a constant voltage, prevents the timer circuit operation from becoming dependent on the power supply voltage, and also improves the temperature characteristics due to the correlation with the base-emitter voltage of the transistor Q8.

Capacitor C2 functions as a low-pass filter and prevents transistor Q4 from malfunctioning due to noise.

When rewinding, press the switch as shown in Figure 7.
Since SW3 is on the R terminal side and the film presence/absence detection switch SW4 is on, transistor Q2 is on, and at the same time transistors Q4 and Q1 are off, so the motor's power supply direction is reversed from that during winding, and the motor is reversed. The film is rewound until the switch SW4 detects the leading edge of the film and turns off.

Since the switch SW2 is forcibly switched to the b terminal side by the press lever 54 as shown in FIG. 7, there will be no short circuit between both ends of the motor. Also, at the same time as transistor Q2 is turned on, transistor Q3 is turned on, and diode D1 and transistor Q3 are turned on.
Since the capacitor C1 is discharged through the capacitor C1, when the back cover is opened, the switch SW3 is switched from the R terminal side to the W terminal side, and at the same time a trigger is activated to wind up the remainder of the winding. The switch SW5 is a switch that is turned off when the battery is stored and turned off when the battery is not stored.
01. As shown in FIG. 9A, when the battery 103 is housed in the battery chamber 102, the first contact piece 100 and the second contact piece 101 are not in contact with each other. Therefore, switch SW5 is turned off. This is because the electrode contact piece 104 pushes up the insulating pin 100a implanted at the free end of the first contact piece 100. Electrode contact piece 1 is provided integrally with this battery storage switch SW5 and protrudes into the battery chamber.
04 is in contact with the positive electrode of the battery 101 and supplies power to the circuit.

When the battery compartment cover 102a, which is removably provided at the bottom of the battery compartment 102, is removed and the battery 103 is taken out, the electrode contact piece 104 releases the contact with the insulating pin 100a, so that the first contact is removed, as shown in FIG. 9B. 100 pieces
and the second contact piece 101 come into contact and the switch SW5 is turned on. This switch SW5 has a battery 103
The trigger capacitor C1 is discharged in response to the removal of the trigger capacitor C1. The reason for this will be explained below.

When the battery is exhausted and the winding speed decreases, the time required to wind one frame of film may be longer than the predetermined time measured by the timer circuit, in which case the timer circuit will operate and stop the motor. . The trigger capacitor C1 is then recharged because the discharge path of the capacitor C1 through diode D2 and transistor Q4 is cut off.
If this continues, even if a new battery is loaded, charging current will not be able to flow through the capacitor C1, making it impossible to restart the motor. Therefore, the trigger capacitor C1 is discharged in conjunction with battery replacement.

[Effect of idea]

As described above, the camera of the present invention includes a battery and a powered circuit that operates by receiving power from the battery, and this powered circuit changes from a discharged state to a charged state by receiving power from the battery. A camera including a migrating capacitor and a responsive circuit responsive to charging of the capacitor, including switch means for short-circuiting the capacitor in response to a battery replacement operation, the switch means short-circuiting the capacitor to discharge the capacitor. By setting the capacitor to the state, the capacitor can be charged, and the response circuit can be operated.
This allows the powered circuit C1 to operate normally even after the battery 103 is replaced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention as seen from the lens side, showing a state in which the back cover is closed and shutter charging is completed. Figures 2, 3, 4, 5, and 6 are partial plan views of Figure 1;
The figure is a perspective view showing the rewinding mechanism, and FIG. 8 shows the electric circuit of this embodiment. FIG. 9A shows a state in which a battery is housed in the battery chamber, and FIG. 9B shows a state in which a battery is not housed in the battery chamber. Explanation of symbols of main parts, 103...Battery, C1
...Power supplied circuit, SW5, 100, 101...Setting means, Q5...Response circuit.

Claims (1)

[Claims for Utility Model Registration] 1. Comprising a battery and a powered circuit that operates by receiving power from the battery, and the powered circuit transitions from a discharging state to a charging state by receiving power from the battery. A camera including a capacitor and a responsive circuit responsive to charging of the capacitor, further comprising a switch means for short-circuiting the capacitor in response to the battery replacement operation, the switch means setting the capacitor to the discharged state. A camera characterized in that it has a setting means that enables the capacitor to be charged and to operate with the response circuit. 2. Utility model registration claim 1, characterized in that the switching means of the setting means short-circuits the capacitor in response to removal of the battery, and the switching means includes a contact piece that is electrically connected to one pole of the battery.
Camera mentioned in section.