JPS6113727B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention has a motor built into the camera, and the motor drives the film, shutter (mirror), etc.
The present invention relates to a motor drive camera that enables film winding and film rewinding operations.

Generally, what is called a motor drive camera is a camera that has a connecting part that can be connected to a separate motor drive device.
There were some problems with operability. In addition, due to the mechanism configuration, the film and shutter are simultaneously wound from one winding system, so there is a large transmission loss, which places a heavy burden on the motor drive device, especially the motor. It had the major drawback of requiring a high power supply voltage.

The motor drive camera according to the present invention minimizes transmission loss in the transmission system by separating the film winding motor from the shutter charge or mirror charge motor, and uses a small motor that can be driven with a low voltage power supply. The present invention provides a motor drive camera that is built into the camera and has a rational mechanical configuration that enables winding, rewinding, and multiple exposure by motor drive without engaging or disconnecting the transmission system.

The embodiment will be explained below with reference to the drawings. Fig. 1 shows the configuration of the embodiment, and Fig. 2 to 5
The figure is a detailed diagram showing the relationship between the film winding, shutter charge or mirror charge end detection member, and the switch and shutter release member. In Figure 1, 1 indicates the camera body, 2
is the drive motor for film winding, and the spool 3
is stored inside. Reference numeral 4 designates the output shaft of the motor 2, which is frictionally connected to the gear 5 by a known friction member 4a, and the friction member 4a is a so-called slip mechanism designed to prevent overload from being applied to the film. The gears 6 and 7 are integrally connected gears, and the motor driving force is transmitted to the spool gear 8 through the gears 6 and 7.
and sprocket gear 9, respectively. The spool gear 8 and the spool 3 are frictionally connected by a known friction member (not shown). A disc 12 integral with the sprocket gear 9 is provided with a cylinder having a film winding angle regulating groove 12b and a long groove 12a. Sprocket gear 9 and disk 12
A pin 10 is attached to the sprocket shaft 10 which is inserted into the sprocket shaft 10.
The pin 10c is placed in the long groove 12a, and the pin 10f is placed in the long groove 11 of the sprocket 11.
a, the sprocket shaft 10 is movable in the vertical direction, and rotates integrally with the sprocket gear 9, disc 12, and sprocket 11 in the radial direction. Film winding angle regulation lever 1
3 is rotatably supported by the main body 1 and given levorotation by a spring 13e, one end 13a of which engages with the groove 12b of the disc 12 due to its levorotation when one frame of film has been wound. . Further, a pin 13b is implanted in one end 13a, and the pin 13b and one end 55
The locking lever 55 that abuts at point a is rotatably supported by the main body 1, and is given left rotation by a spring 55c that is weaker than the spring 13e. The other end 55b of the locking lever 55 engages with the shutter release interlocking member 56, and in the state in which film winding is completed in FIG. Since the shutter release interlocking member 56 is outside the motion locus, the shutter release can be operated, but as shown in FIGS. Since it is within the movement locus of the member 56, the shutter release operation cannot be performed. A pin 13d is implanted at the other end of the film winding angle regulating lever 13, and comes into contact with a film winding end switch 16. When film winding is finished, the one end 13a engages with the groove 12b, and the switch 16 Switch from closed to open, cut off the electricity to the film winding motor circuit, and at the end of release (at the end of trailing curtain travel or at the end of mirror restoration) switch from open to closed as explained below.
When the motor is energized and the film is being wound, the outer peripheral portion 12d of the disc 12 keeps it closed. 15 is a shutter rear curtain interlocking member (or mirror restoration interlocking member) that operates in conjunction with the shutter rear curtain drive member (or mirror drive member), and is used for shutter charge (or mirror charge) and shutter release (or mirror release). This is a known member that performs reciprocating motion by a spring 13e and a spring 1 described later.
Needless to say, it is more powerful than 4b and 57d. A linking lever 14 coaxially supported with the lever 13 is given dextrorotation by a spring 14b,
One end 14c abuts on the member 15, the other end abuts on one end 57a of the switching lever 57 at the outer peripheral portion 14d, and engages with the one end 57a at the notch 14a. The switching lever 57 is rotatably supported by the main body 1, is given right-handed rotation by a spring 57d, and one end 57a engages with the switching lever 14.
The other end 57c is in contact with the member 15, and a pin 57b is implanted in the other end, which is a shutter charge (or mirror charge) end switch 17.
It is arranged so that it is in contact with the FIG. 4 shows the shutter charge in progress, and FIG. 2 shows the state in which the shutter charge is completed. As will be described later, the shutter charge is performed by the shutter charge motor 19, and the member 15 is 15b→15c→1
5a, the one end 14c of the linking lever 14 is rotated to the right, and the one end 57a of the switching lever 57, which was held by the outer circumference 14d of the other end, is brought into engagement with the notch 14a of the lever 14. The lever 57 is turned to the right, and the pin 57b on the other end of the lever 57 is used to switch the switch 17 from closed to open, thereby cutting off the power to the shutter charge (or mirror charge) motor circuit. On the other hand, when the shutter is released as shown in FIG.
5a → 15b, but at the end of the movement, the film winding angle regulating lever 13 and the switching lever 57 come into contact with the ends 13c and 57c at the same time, and in the former, the film winding end switch 16 is opened → In the latter case, the shutter charge end switch 17 is switched from open to closed, and the film winding motor circuit and the shutter charge motor circuit are energized almost simultaneously. FIG. 5 is a diagram showing a state where the film winding has stopped midway, and the film winding angle regulating lever 13 is attached to the disk 1.
2, the locking lever 55 is located within the movement locus of the shutter release interlocking member 56 due to the pin 13b on the lever 13. Since the film winding is completed in this state, the film winding motor idles in the slipper groove 4a, and no overload is applied to the film. On the other hand, since the shutter charge motor 19 is independent from the film winding motor 2, it continues to rotate.
When the shutter charge is completed, the shutter charge end switch 17 switches from open to closed as explained above, and as explained later, the switch 17 connected in series to the power supply is opened to start the film winding operation. Power to motor 2 is also cut off. Next, even if an attempt is made to operate the shutter release, the locking lever 55 prevents the shutter release operation as described above, informs the photographer that film winding is complete, prevents multiple exposure of the final frame, and prevents multiple exposure of the final frame. It also prevents wastage of power. 19 is a drive motor for shutter charge, motor output shaft 19
A is integrated with a gear 20a by a one-way clutch 20 when the motor turns left. Also, a known friction member 2
Gears 21 and 22 are frictionally connected by 1a, and the friction member 21a is a so-called slip mechanism designed to prevent overload from reaching the shutter and mirror drive systems. Motor driving force is connected to gear 20
It is transmitted to gear 26 via a, 21, 22, 23, 24, and 25. A charge lever 27 is rotatably supported on the gear 26 and is given left-handed rotation by a spring (not shown). 29 is shutter 30
A disc 28 that engages with the charge lever 27 is integrally attached to the winding drum, and is rotatably fitted into the connecting gear 26. The motor driving force is transmitted to the shutter take-up drum 29 via the charge lever 27 and the disc 28, and the drum 29 rotates in the direction of the solid line arrow in FIG.
0 is charged, and at the end of charging, the shutter charge end switch 17 changes from closed to open as described above, and the power to the motor 19 is cut off, completing the charging. On the other hand, as the shutter release interlocking member 34, which operates in conjunction with a shutter release member (not shown), moves in the direction of the arrow in FIG. As a result, the shutter take-up drum 29 rotates in the direction of the dotted line arrow in FIG. 1, and the shutter 30 travels. 35
is a cam disk integrated with the connecting gear 24, and one rotation of the cam disk 35 causes the mirror charge lever 36 to be activated.
is configured to reciprocate through rollers 37 to charge a mirror driving member (not shown). The other output shaft 19b of the shutter charge motor 19 is integrated with a gear 38a when turning the motor to the right by a one-way clutch 38, and the motor driving force is transmitted to a connecting gear 39. When rewinding the film, an N key 40 is inserted into the connecting gear 39 to engage with a film cartridge key (not shown).
is located at the bottom of the cartridge, and when the rewind operation member 41 is operated, the N key shaft moves in the thrust direction and engages with the cartridge key, and the concave portion 39a of the connecting gear 39 and the convex portion of the N key shaft portion move. 40
a is engaged, the motor driving force is transmitted to the N key 40, and the film is being rewound. A shaft 42 rotatably fitted into the main body 1 is fixed to the film rewinding operation member 41, and an interlocking lever 43 is fixed to the other end of the shaft 42, and is integral with the operation member 41 at least in the radial direction. It's summery. Pins 43a and 43b are implanted at one end of the lever 43, and the pin 43
The end 43c is located under the collar of the N key 40. 46 is a sprocket release lever, which is rotatably supported by the main body 1, with one end facing below the collar 10a of the sprocket shaft 10, which is given dextrorotation by a spring 47 and stopped by a stopper 45. There is. Further, the pin 46a attached to the other end of the lever 46 and the pin 43a are connected by a connecting member 44, and are interlocked by operation of the film rewinding operation member 41. 51 is the shutter release button, 52 is the shutter release button 5
The pin 50 implanted at 1 is a release interlocking switch, and the switch 50 changes from closed to open when the shutter release button is pressed, and from open to closed when the shutter release button is released. 53 is a power switch, and 54 is a power source.

Next, the motor drive circuit 60 will be explained.
In the figure, the film winding motor 2 and shutter charge (or mirror charge) motor 19 are connected in parallel to a power supply 54, and a power switch 53, a release interlocking switch interlocking switch 50, and a shutter charge interlocking switch 50 are connected in parallel. An end switch 17 and a rewind switch 58 parallel to the switch 17 are connected in series. Further, a film winding end switch 16 and a film winding stop switch 18 are connected in series with the film winding motor 2. Shutter charge motor 19 Reverse switch 4 for automatic rewind
Among 8 and 49, the neutral terminal 48b is the motor 1
9 terminal, 49b to motor 19 terminal, 4
8c, 49a to power terminal (ground), 48c.
49c are connected to the power terminals respectively, and are used for normal shutter charge (or mirror charge)
In this state, the motor 19 is energized through the power terminals -48c-48b-motor-49b-49a, and the motor 19 rotates to the left, but during rewinding, the power terminals -49c-49b-motor-48b-48a - Motor 1 through the power terminal
9 is energized, and the motor 19 rotates to the right. on the other hand,
The rewinding switch 58 connected in parallel with the shutter charge end switch 17 is normally open when the film winding is completed as described above. It supplies power at the same time. In the motor drive circuit 60, a shutter charge (or mirror charge) end switch 17 is connected in series with the power supply, but this takes longer time to perform shutter charge (or mirror charge) than to wind the film. Of course, this assumes that it is long. That is, if the shutter charge ends earlier than the film winding, the electricity will be cut off by opening the shutter charge end switch 17 before the film winding is completed.
At the very least, shutter charging has to take longer than film winding, but creating a time difference between film winding and shutter charging is a mechanical advantage that will not be explained in detail here. This can be easily implemented (for example, by making a difference in the reduction gear ratio or by making a difference in the rotational speed of the motor) or electrically (for example, by providing a delay circuit).

Next, to explain the operation, FIGS. 1 and 2 show a state in which film winding and shutter charge (mirror charge) are completed, and even if the power switch 53 is closed, the shutter charge end switch 1
7 is open, the motor is not energized. When the shutter release button 51 is pressed, the release interlocking switch 50 opens, and as long as the shutter release button 51 is kept pressed, the motor is not energized, and the release interlocking member 34 is activated in conjunction with a shutter release member (not shown). When the shutter 30 moves in the direction of the arrow in FIG. 1 and releases the engagement of the disc 28 of the charge lever 27, the shutter 30 runs. Further, in a single-lens reflex camera, the mirror raising drive member is released in conjunction with the shutter release button 51, and the release interlocking member 34 moves in the direction of the arrow in FIG. 1 in conjunction with the end of the mirror raising. At the end of the shutter trailing curtain run as shown in FIG. 3, as explained above, the shutter trailing curtain interlocking member 15
The film winding end switch 16 and the shutter charge end switch 17 are switched from open to closed, respectively, and the motor becomes ready to be energized.If the release interlocking switch 50 is closed at this time, the film winding and shutter charge motor 2 is turned on. ,19
are energized almost simultaneously and start winding. That is, even if the shutter release button 51 is released immediately, the motor will not be energized unless the rear curtain completes its travel. In addition, in a single-lens reflex camera, the mirror restoration drive member is released in conjunction with the end of the rear curtain travel, and the mirror restoration interlocking member 15, which is linked to the drive member, moves as shown by the arrow in FIG. 3 at the end of the mirror restoration. Switches 16 and 17 are closed in the same manner as described above. but,
When the shutter release button 51 is released, that is, when film winding and shutter charge (and mirror charge) are completed, as shown in FIGS. 1 and 2, the motor is always stopped.

Next, to explain multiple exposure, the sprocket shaft 10 protruding from the bottom of the main body 1 from the state shown in FIG.
When b is pushed up, the film winding stop switch 18 changes from closed to open, and the film winding motor drive circuit becomes open. In this state, after releasing the shutter by pressing and releasing the shutter release button 51, the shutter charge motor 19
Only the shutter (and mirror) is charged, and a predetermined multiple exposure is performed. Further, although the film winding stop switch 18 is provided separately, a film winding end switch 16 may also be used, and the switch 16 is opened during multiple exposures in conjunction with the multiple exposure operating member or the ON-OFF operating member. Even if the state is maintained, the function is satisfied.

Next, automatic rewinding will be explained. When the automatic rewinding operation member 41 is turned left in the direction of the arrow from the state shown in FIG. 1, the sprocket release lever 46 is turned left via the interlocking lever 43 and the connecting member 44.

By turning the lever 46 to the left, the collar 10a of the sprocket shaft 10 is pushed up at its one end 46b, and the engagement between the groove 12a of the disc 12 integral with the sprocket gear 9 and the pin 10f on the sprocket shaft is released, and the sprocket 11 is released. and open the film winding stop switch 18.
Open the film winding motor drive circuit. On the other hand, by turning the interlocking lever 43 to the left, its one end 43c pushes up the collar portion 40b of the N-key shaft 40, and the connecting gear 39 and the N-key shaft 40 engage with each other, and a film cartridge key (not shown) and the N-key 40 engage with each other. do. In addition, a pin 43b implanted at the other end of the interlocking lever 43 causes the rewinding switch 58 to open and close, and the motor 19 to reverse the rewinding switch 4.
Switch 8 and 49 to the rewind rotation direction, respectively.
The film is automatically rewound by reverse rotation of the shutter charge motor 19.

As described above, by separating the film take-up motor 2 and the shutter charge or film rewind motor 19, the output of each motor can be reduced, that is, the motor can be made smaller, and the mechanism can be separated. This allows the transmission loss of each transmission staff to be minimized, as well as 2.
Since the individual motors can be switched by a circuit, there is no need for individual transmission clutches, and automatic rewinding and multiple exposure can be performed with a simple mechanism, which has great effects.

[Brief explanation of drawings]

FIG. 1 shows a configuration diagram of an embodiment of the present invention, and FIG. 2 is a mechanism-related diagram showing a completed state of film winding and shutter charge (and mirror charge).
FIG. 3 is a diagram showing the release completion state, FIG. 4 is a diagram showing the film winding shutter in the middle of charging,
FIG. 5 is a diagram showing a state in which the film is stopped midway through winding. 1... Camera body, 2... Film winding motor, 3... Spool, 4... Motor output shaft, 5, 6, 4... Connection gear, 8... Spool connection gear, 9... Sprocket gear , 10... Sprocket shaft, 11... Sprocket 12... Disk, 13... Film winding angle regulating lever, 1
4... Linkage lever, 15... Shutter rear curtain interlocking member, 16... Film winding end switch, 1
7...Shutter charge end switch, 18...
...Film winding stop switch, 19...Shutter charge motor, 20...One-way clutch, 21, 22, 23, 24, 25, 26...Connection gear, 27...Charge lever, 28...Disc plate , 29...Shutter winding drum, 30...
Shutter, 34...Shutter release interlocking member, 35...Cam disc, 36...Mirror charge lever, 27...Roller, 38...One-way clutch, 39...Connection gear, 40...N key, 4
DESCRIPTION OF SYMBOLS 1... Rewind operation member, 42... Shaft, 43... Interlocking lever, 44... Connection member, 45... Stopper, 46... Sprocket release lever, 47...
Spring, 48...Motor 19 Reverse switch, 4
9...Motor 19 reverse rotation switch, 50...Release interlock switch, 51...Shutter release button, 52...Pin, 53...Power switch, 5
4...Power source, 55...Latching lever, 56...Release interlocking member, 57...Switching lever, 58...Rewinding switch, 60...Motor drive circuit.

Claims (1)

[Claims] 1. A film winding motor drive circuit in which a film winding motor and a shutter charge or mirror charge motor are provided independently, and both motors are connected in parallel to a power source. and a shutter or mirror charge motor drive circuit are arranged in parallel, and a first switch that moves from a closed position to an open position in conjunction with the release operation of a shutter release member, and a closed position in which the shutter or mirror charge is completed. A second switch is connected in series to both of the drive circuits, and is moved from the open position to the closed position at the end of trailing curtain travel or the end of mirror restoration. In a motor drive camera in which motors are driven simultaneously, the motor drive camera includes an automatic film rewinding operation member, an interlocking member that engages with a film cartridge key in conjunction with the operation member, and the operation member as well. an interlocking member that releases the sprocket in conjunction with the shutter charge or mirror charge motor drive circuit; a motor reverse rotation switch connected to the shutter charge or mirror charge motor drive circuit; and a rewind switch connected in parallel to the second switch. and a switching member that switches the motor reverse rotation switch and rewind switch in conjunction with the operating member, and further includes an automatic rewinding device that switches the motor reverse rotation switch and the rewinding switch from the closed position to the open position in conjunction with the operating member. A displaceable switch is connected to a film winding motor drive circuit, and when the film is automatically rewinded, the film winding motor drive circuit is opened by the operating member, and the drive of the film winding motor is stopped. A motor drive camera characterized in that film is automatically rewound by driving a shutter charge or mirror charge motor in reverse rotation.