JPS6026203B2 - motor drive camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor drive camera, and more particularly to a motor drive camera in which a motor for winding a film, charging a shutter, and driving a mirror is housed within a camera body.

When developing a camera in which a motor drive device is integrated into the camera, the following points must be kept in mind.

1. Even if the motor is built into the camera, the external shape will not be too large compared to the camera without the built-in motor.
2. Therefore, it is desirable to use only one motor from the viewpoint of downsizing and parts cost.

3 It is preferable that the motor be as small as possible due to space constraints.

It is preferable to use a motor that is smaller than the motor of a conventional external winder, but the smaller the motor, the lower the output. 4. When using such a small motor, in order to effectively utilize its output, it is necessary to avoid applying unnecessary energy to mechanical members and causing impact, resulting in loss of energy. , transmission loss should be minimized as much as possible.

In view of the above, an object of the present invention is to provide a motor-driven camera that can be made smaller as a whole by effectively utilizing the output of the motor.

In order to achieve the above object, a motor drive camera according to the present invention includes a motor capable of forward and reverse rotation, and a first motor of the motor.
A shutter charge and a film winding machine are coupled through a first clutch that transmits rotation of the motor in a second direction, and a lowering motor is coupled via a second clutch that transmits rotation of the motor in a second direction. a mirror mechanism provided with a behavior, a means for releasing and releasing the shutter by raising the mirror, and rotating the motor in a second direction in response to a release signal, by a rotational force transmitted via the second clutch. The control circuit includes a control circuit that raises the mirror, stops the motor in response to a signal detecting the mirror's elevation, rotates the motor in a first direction in response to a shutter close signal, and stops the motor in response to a winding end signal. ing.

According to the above configuration, the output of the motor can be rationally distributed and extracted, and the object of the present invention can be completely achieved. The present invention will be explained in more detail below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an example of the mechanism in the device of the present invention.

In this example, the motor 1 is assembled into the inner cylinder 2 of the spool. The output shaft la of the motor drives the shutter charge film winding point, and the output shaft lb drives the mirror quick return mechanism and the automatic diaphragm. The shutter charge, film winding mechanism, mirror quick return mechanism, and automatic aperture mechanism are driven by switching the direction of rotation of the motor 1 between forward and reverse rotation.

That is, when interlocking the shirt charge and film winding sideways by rotating the motor in the forward direction, the interlocking with the mirror quick return and automatic aperture mechanisms is performed by rotating the motor in the reverse direction. A clutch plate 3a is attached to the motor output shaft la.
, a clutch cam 4a is integrally attached, and a clutch gear 7a is coaxially engaged with a ball 5a and a spring 6a (see FIG. 2).

When the motor 1 rotates counterclockwise, the clutch plate 3a, which is integral with the output shaft la, and the clutch cam 4a also rotate integrally in the counterclockwise direction, but at this time, the ball 5a moves between the clutch cam 4a and the clutch gear 7a. Since it is inserted into the narrower gap, the clutch gear 7a also rotates together. When the clutch gear 7a rotates, the rotation is transmitted to the one-rotation shaft 9 via the reduction gear train 8. The reduction gear train 8 is provided with a friction spring 8a that absorbs a sudden start-up of the motor and an overrunning until the rotation stops due to cutting off of the motor current. The one-rotation shaft 9 is integrated with the one-rotation limiting plate 10 and the idle gear 13.
The shirt charge mechanism is linked to the film winding iso foundation through the .

When the one-rotation limiting plate 10 makes one rotation clockwise, the one-rotation limiting lever 11 enters the notch 10a by the spring 12, cutting off the mechanical movement and at the same time, the rotation from the motor 1 is stopped by the movement of a switch to be described later. .

The idle gear 13 is interlocked with the spool gear 14,
The spool is rotated via a friction spring 15 to absorb excess rotation, and the idle gear 13 is interlocked with the sprocket gear 16 to rotate the spool.

When the bucket 18 is rotated, it is interlocked to the shutter side by a partially toothed gear 17 integrated with the sprocket gear 16. When the shirt charge is completed and the film is wound by the specified amount, the one-turn limit lever 11 enters the notch 1 of the one-turn limit plate 10 and stops interlocking, as described above. 11, switches S2 and S
3, the motor 1 is switched to rotate in the reverse direction (clockwise), and at the same time, the switches S4 and S6 are also switched.

When the electric circuit is activated by pressing the release button in this state, the motor 1 starts to rotate in the opposite direction (clockwise) and is linked to the mirror up automatic aperture mechanism by the mechanism described later. The gear train that moves is in a stopped state because the one-rotation limiting lever 11 has entered the notch 10a of the one-rotation limiting plate 10, but the clutch mechanism A prevents the clutch plate 3a, which is integrated with the motor output shaft la, and the clutch Only the cam 4a rotates in the opposite direction. That is, when the motor 1 rotates in reverse, the ball 5a moves to the wider gap between the clutch cam 4a and the clutch 7a, so the clutch gear 7a becomes free.
The clutch mechanism A attached to the output shaft la of the motor is configured as described above, so when the motor 1 rotates counterclockwise, the clutch gear 7a also rotates integrally, thereby performing shutter charging and film winding. When the clutch plate 3a and the clutch cam 4a are rotated in the reverse clockwise direction, only the clutch plate 3a and the clutch cam 4a rotate.

Next, power transmission from the motor 1 to the mirror quick return mechanism and automatic aperture mechanism will be explained.

Interlocking with the mirror quick return mechanism and automatic diaphragm mechanism is performed via the other output shaft lb of motor 1, and rotation is opposite to the rotational direction (counterclockwise) of interlocking with the shutter charge film winding (clockwise direction). This is done using

Therefore, a clutch mechanism B that operates in reverse to the clutch mechanism A described above is attached to the output shaft lb of the motor. That is, the clutch cam 4b is attached to the output shaft 1b with the front and back sides of the clutch cam 4a being reversed, and the ball 5 and the spring 6 are also attached in opposite directions. Therefore, during the above-mentioned shirt charge and film winding (when the motor 1 rotates counterclockwise), the clutch plate 3b of the clutch mechanism B, which is integrated with the motor output shaft lb,
, only the clutch cam 4b rotates, the clutch gear 7b does not rotate, and is not interlocked with the mirror quick return mechanism or automatic diaphragm mechanism. When the shutter charge and film winding are completed, the motor 1 is temporarily stopped by the movement of the one-rotation limiting plate 10, the one-rotation limiting lever 11, and the switches linked thereto, and is then switched to reverse rotation. In response to the Lease signal, the motor 1 rotates the clutch gear 7b via the clutch mechanism B, and rotates the mirror up gear 21 counterclockwise via the reduction gear train 20. Incidentally, this gear train 20 is equipped with a friction SP 20'a which has the above-mentioned role during winding. The mirror up gear 21 rotates within 1800 degrees, and in the embodiment of the present invention, it rotates within 1800 degrees.
It is a 20o rotation.

Furthermore, the gear 21 is transmitted to a mirror-up limiting gear 22, to which a mirror-up limiting plate 23 is integrally fixed, and these are regulated to rotate within one rotation. When the mirror up is completed, the mirror up limit lever 24 is inserted into the notch 23a of the mirror up limit plate 23.
is inserted by the spring 25, and the mechanical interlock is cut off.At the same time, the electric circuit is also cut off by the switch interlock, which will be described later.
The linkage to the mirror-up and aperture mechanisms has been cut off, and the motor is in good working order. (State of Fig. 3-2) The mirror up gear 21 is provided with a pin 21a for moving the sliding plate 32 in the direction of the arrow.
is pulled in the direction opposite to the arrow by a restoring spring 33 for restoring it, and is restricted by a fixing pin 34.

When the mirror up gear 21 rotates counterclockwise due to the clockwise rotation of the motor 1 described above, the piston 21a slides the sliding plate 32 in the direction of the arrow against the restoring spring 33.

This sliding plate 32 is provided with grooves 32a and 32b in addition to the groove that engages with the pin 21a, and 32a pushes the pin 35a of the mirror up lever 35 to rotate the mirror up lever 35 around the shaft 36. Rotate clockwise,
Furthermore, the groove 32b pushes the pin 37a of the narrowing lever 37, and the narrowing lever 37 is rotated clockwise about the shaft 38 as well.

(State of FIG. 3-1) The mirror up lever 35 pushes up the pin 39 which is integral with the mirror and the mirror frame, so the mirror rotates upward about the shaft 40.

Furthermore, the shutter interlocking lever 41 is the mirror up lever 3.
Since the mirror up lever 35 is rotated clockwise, the mirror up lever 35 is rotated counterclockwise via the link lever 42 with the shaft 43 serving as the rotation axis. When the mirror up and narrowing down are completed, the mirror up limit lever 2 is inserted into the notch 23a of the mirror up limit plate 23.
4 enters and breaks the mechanical interlock and electrical circuit (see Figure 3-2), but at the same time the shutter interlock lever 41
releases the leading hook (not shown), the leading curtain starts running, and the shutter mechanism is activated. The front curtain is started by a shutter mechanism (not shown), and the rear curtain also starts running, but during this time, the power supply to the motor is cut off by a switch movement described later, so the motor does not rotate in either direction. Next, the rear curtain pane drum 51, which is integrated with the rear curtain, is in gear 5.
2 and interlocks with the interlocking gear 53 within one rotation. On the other hand, a pinion gear 55 that is integral with the trailing curtain winding shaft 54 is interlocked with the trailing curtain gear 56. When the rear curtain runs, the motion gear 53
rotates counterclockwise, and the trailing gear 56 also rotates counterclockwise. Near the completion of trailing travel, the pin 53a of the interlocking gear 53 pushes the mirror up limiting lever 24 and rotates it clockwise, causing the notch 23 of the mirror up limiting plate 23 to
At the same time, the pin 56a of the rear curtain gear 56 pushes the one-rotation limiting lever 11 and rotates it in the clockwise direction, thereby releasing the one-rotation limiting plate 10. unlock.

When the contact between these two limit plates and the limit lever is released, power is supplied to the motors 1-3' by switching the SW linked to the limit lever, and the motor 1 starts rotating counterclockwise. , film winding is started, but at the same time, the output shaft lb is moved by the clutch mechanism 8 to the latch plate 3b and the clutch cam 4, which are integrated with the output shaft lb.
It is in a state where it is rotated counterclockwise at the angle b. However, the mechanical movements associated with mirror up and aperture are limited to the mirror up limit plate 23 and the mirror up limit lever 24.
Since the exposure has been canceled, the output shaft of the motor
When b rotates counterclockwise, the restoring spring 33 provided on the sliding plate 32 returns the sliding plate 32 in the opposite direction of the arrow, so the mirror up gear 21 that is linked to this moves in the opposite direction to when the mirror is up. The gear train that is interlocked with this starts to rotate in the opposite direction (clockwise, opposite to the arrow), and the sliding plate 32 rotates in the opposite direction until it is constrained by the fixed pin 34. Stop.

At this time, the notch 23a and the mirror-up limiting lever 24 of the mirror-up limiting plate 23 are disengaged, and the mirror-up limiting plate 23 rotates together with the mirror-up limiting gear 22 due to the mirror down.
Further, the interlocking gear 53 is also rotated by the shutter charge, so that the mirror up limiting lever 53a is in contact with the outer periphery of the mirror up limiting plate 23.

(Situation in Figure 3-1) That is, at the same time as the shutter charge and film winding, the mirror down and the aperture are released by the function of the restoration 1 imitation 33, but compared to the reduction ratio for the shirt charge and film winding. Since the reduction ratio that moves the mirror up is smaller, mirror down aperture cancellation is completed faster, but after this is completed, the motor output shaft lb is moved by the clutch mechanism B, so that the clutch cam 4b and the clutch plate 3b are integrated. Just rotate it counterclockwise.

When the shirt charge is completed and the film is wound by a specified amount, the one-rotation limiting plate 10 and the one-rotation limiting lever 11
Rotation is stopped, and by switching the switch in conjunction with this, motor 1 is now able to rotate in the opposite direction (clockwise), and all preparations for shooting are completed, and shooting can begin in conjunction with the release. can. FIG. 4 is a circuit diagram showing the basics of an electric circuit for controlling the driving operations and interlocking operations of each of the aforementioned mechanical sections.

The electric circuit shown in FIG. 4 will be explained below.

S is a switch, and turning it on activates the circuit.

S2 and S3 are switches for changing the rotational direction of the motor (corresponding to the motor 1), which act on the one-rotation limit lever 11. Further, S4 and S6 are also moved to the one-rotation limit lever 11, and S4 is turned on when winding is completed and turned off when trailing travel is completed, and conversely, S6 is turned off when winding is completed and turned on when trailing travel is completed. S3 is turned off in the mirror-up state, and at other times, during the mirror-up movement, the mirror-gun movement, and when the mirror-down is completed, the switch that is turned on operates the mirror-up limit lever 24.

E indicates a power source. In Figure 4 A, the shutter charge and film winding have been completed, S6 is in the OFF state because winding has been completed, and the cutting SW, S2, and S3 are turned off by the motor in the direction of mirror up drive. M is switched to rotate.

When the shutter switch SWS is turned on in this state, only the lower circuit is activated and the mirror-up movement is started. (State of Mouth) When the mirror up is completed, the mirror up limit lever 24 enters the notch 23a of the mirror up limit plate 23, so the SW flea is turned off. (State C) In this state, the motor M does not rotate in either direction and is in a stopped state.

When the mirror up is completed, the front curtain starts, and then the rear curtain starts, but at the end of the rear curtain advance, the one rotation limit lever 11 and the mirror up limit lever 24 are pressed and rotated clockwise, respectively, and the mechanical interlocking is activated. At the same time as making it free, change the switch. That is, switches S2 and S3 are switched to rotate the motor to the shirt charge and film producer side, and at the same time switch 6 is switched to 1.
Turn on the rotation limit lever 11, wind up the shirt,
Start film winding.

On the other hand, the switch S5 is turned on by the rotation of the mirror up limit lever 24, but at the same time the switch S4 is turned off by the one rotation limit lever, so the mirror up circuit does not work.

At this time, the mirror is mechanically lowered by the action of the spring 33 as described above. Although the mirror up circuit does not operate, the winding side circuit operates, so shutter charging and film winding are performed, and when the specified amount is completed, the one-rotation limiting plate 10 enters the one-rotation limiting lever 11, so each switch is switched. The state returns to the state shown in Fig. 4.

FIG. 5 is a circuit diagram showing a more specific control circuit. This circuit is designed to reduce the number of switch systems and ensure a smooth camera operation sequence.

The camera sequence according to this example is as follows.

Step 1 Start the motor clockwise with the release (this is considered reverse rotation) to start the mirror-up movement.

Step 2 The motor stops when the mirror is raised.

After Step 3 *After driving is complete, turn the motor counterclockwise again (
The mirror is turned down and hoisted up at the same time.

Step 4 The motor stops when winding is complete.

According to the circuit shown in FIG. 5, the above steps are performed automatically in sequence by turning on the shutter switch.

FIGS. 6a and 6b are exploded perspective views of the switch mechanism part that interlocks with the one-rotation limiting plate and the switch mechanism part that interlocks with the mirror-up limiting plate when implemented using the specific control circuit shown in FIG. 5, respectively. . The operation is as follows. Now, power supply S
When WSo is turned on and the release switch S is turned on, the output P of the flip-flop circuit (FF circuit) becomes [H].
It is inverted to [L] and latched.

Due to this output ○, the output of the next inverter lnv is [H
]. The input level of transistor Tr rises, and T
r is switched on. (In addition, at this time, S4
is off. ) Since the switching SWS2 and SWS are both in the position a, the motor M rotates clockwise. As a result, mirror-up is started as described above. When this mirror-up is completed, the bar 24 jumps into the notch 23a of the disk 23, and the switch S4 is turned on.

Since the base of the Tr becomes 0, the Tr is turned off, the current to the motor M stops, and the motor stops. Next, as the starter runs, S2 and S2 are switched from a to b, and the motor is connected in the reverse state.

This causes the motor to rotate in the opposite direction (
forward rotation).

This causes the clutch to escape, so the spring 33
The mirror descends due to the restoring force. At the same time, the winding state is activated. On the other hand, when S2 and S3 are in state b, one peak on the input side of F.F connected to the terminal of motor M through R5 becomes [L], so that the release switch S. If is off, the previous latch will be released.

That is, the output ○ changes from [L] to [H] and remains stationary. The output side of the inverter lnv is [L], and the Tr is in an off state. Therefore, when winding is completed and S2 and S3 are switched to a, the motor is stopped although it is in a reverse connection state.

At this point, if S remains on, that is, the release button is held down, one camera operation is completed and S2, S2
At the same time as switching from b to a, the output of F・F is 0, [H
], the output of the inverter lnv becomes [L] instead of [L]
Since the current becomes [H], the motor M starts rotating again (clockwise reversely) with the Tr in the ON state, and the next operation of the camera is started again.

In this way, in this circuit, if the user releases his/her finger from the release button during one operation of the camera, the camera will stop moving for one operation, and if the release button is held down, the camera operation will continue over and over again.

As is clear from the above explanation, unlike conventional motor drive cameras, the motor drive camera according to the present invention simultaneously performs shirt charge, film winding, mirror quick return charge, and automatic aperture charge in one motor. Instead, the shutter charge, film top, mirror up, and automatic diaphragm functions are operated separately, so there is no need to use a large, powerful motor.

Therefore, a small motor is sufficient, and the built-in camera can be made compact by being integrated with the camera body. In addition, the mechanism is simplified because the automatic diaphragm for raising the mirror is performed by a motor. Furthermore, since the mirror is raised by a motor, mechanical shock and energy loss are eliminated, and mechanical efficiency can be increased. Since the interlocking with each mechanism is performed by reliably driving the air circuit with an electrical detection signal, excellent effects such as being able to execute a predetermined sequence without any hesitation can be obtained.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the overall configuration of the camera according to the present invention, Fig. 2 is a plan view showing the clutch mechanism that transmits the motor output, and Fig. 3 is an interlocking diagram to explain the raising and lowering of the mirror. A plan view of the mechanism, FIG. 4 is a circuit diagram showing the principle of the electric circuit of the camera according to the present invention, and FIG. 5 is a circuit diagram showing a more specific electric circuit. FIGS. 6a and 6b are exploded perspective views of a switch mechanism part that interlocks with the one-rotation limiting plate and a switch mechanism part that interlocks with the mirror-up limit plate when implemented using the specific control circuit shown in FIG. 5, respectively. 1...Motor, LALB...
Motor output ball, 2... Spool inner cylinder, 3a... Clutch plate, 4a... Clutch cam, 5a... Ball, 7a... Clutch gear, 8... Reduction gear train, 9... 1 rotating shaft,
10-1 rotation limit plate, 13...idle gear, 14.
...Spool gear, 15...Friction spring, 16...Spring. 17... Missing tooth gear, 18... Sprocket, 20... Reduction gear train, 21... Mirror up gear, 22... Mirror up limit gear, 23... Mirror up limit plate, 24... Mirror up limit lever, 3
2... Sardine board, 33... Restoration spring, 34... Fixing pin, 3
5... Mirror up lever, 37... Aperture lever, 38
...Shaft, 41...Shutter interlocking lever, 42...Link lever, 51...Rear curtain spring drum, 53...Interlocking gear, 5
4... Rear winding upper shaft, 55... Pinion gear, 56...
Rear curtain gear, 8...Current, M...Motor, S,...Release switch, S2, S3...(rotation direction) selector switch, S
4, S5, S6...Switch, So...Power switch, F/F...Flip-flop, lnv...Inverter. Figure 2 Vertical Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A motor capable of forward and reverse rotation, a shutter charge and film winding mechanism coupled via a first clutch that transmits the rotation of the motor in a first direction, and a shutter charge and film winding mechanism that transmits the rotation of the motor in a second direction. a mirror mechanism provided with a descending behavior and coupled via a second clutch to release the shutter; means for releasing the shutter by raising the shutter; The mirror is raised by a rotational force transmitted through a clutch, the motor is stopped by a signal detecting the raising of the mirror, the motor is rotated in a first direction by a shutter close signal, and the motor is rotated in a first direction by a winding end signal. A motor drive camera configured from a control circuit that stops the motor.