JPS61172127A - Motor-driven camera - Google Patents

Abstract

PURPOSE:To allow one motor to execute normal and reverse drives and to drive separate driven parts independently by executing normal and reverse drives by means of a revolution inhibiting means with the use of a planet gear mechanism for a motor drive system and releasing the inhibiting means by an electromagnetic means so as to switch a transmission system. CONSTITUTION:In the photographing state, an arm 34 is attracted and held by a holding type magnet 37, and the planet gear 33 is engaged with the upper gear 35a of a two-staged gear 35. Accordingly, when the motor 30 is normally rotated, its drive force is transmitted to a rack 36 for interlocking with a zoom mechanism through a pinion 31 and gears 32, 33 and 35, and zoomed at the side of a telescope. When the coil 37a of the holding type magnet 37 is conducted and reversely excited, the motor 30 rotates reversely. As a result, holding force with respect to the arm 34 of the magnet 37 is deactuated, and the planet gear 33 revolves counterclockwise and is moved to the position where it is engaged with the upper gear 35a of a two-staged gear 38. Then the drive force of the motor 30 is transmitted to a rewinding fork 40 through a rewinding gear 39, thereby rewinding a film.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an electrically driven camera, and particularly to an electrically driven camera that independently drives a plurality of driven parts by switching the motor drive transmission system. .

<Conventional technology> Conventionally, this type of electrically driven camera mechanically detects the load and switches the clutch, and drives multiple driven parts by condylar switching, but the rotation direction is only one direction, and the clutch Further, the mechanism is complicated, and the noise generated when the clutch is switched is annoying.

Next, a device was proposed that uses planetary gears to switch the transmission system, but it was easy to control and quiet because the transmission system was switched depending on the rotational direction of the motor, but since the transmission system was switched by the rotational force, each transmission drive The rotation direction was only one direction, and reverse rotation was not possible.

Conventionally, when driving a driven part in the forward and reverse directions, for example, in autofocus, power zoom, etc., a motor was placed in each drive part, and the forward and reverse rotation of the motor was directly transmitted. However, in this case, the number of motors used increases, the cost becomes high, and there is no significant advantage in terms of form.

<Problems to be solved by the invention> In order to solve this problem, the gear interlocking system can be mechanically switched using an external operating member, so that one motor can drive multiple targets and drive parts, and can also be driven in forward and reverse directions. A device has been proposed, but it requires external operation as necessary.
It was cumbersome and didn't have a good feel of operation. Furthermore, an automated system has been proposed in which electromagnetic clutches are placed on both output shafts of the motor, but this requires the use of two expensive electromagnetic clutches outside the motor, making it extremely expensive and Current also flows through the electromagnetic clutch, and since the electromagnetic clutch is energy inefficient and has a large moment of inertia, it has drawbacks such as poor controllability when stopping at a predetermined position.

The present invention eliminates the drawbacks of the conventional example described above, and by controlling the orbital motion of the planetary gear, multiple drive units can be driven independently, and forward and reverse driving is possible, making more complex driving possible with fewer drive sources. The aim is to provide a full range of electrically driven cameras.

<Means for Solving the Problems> The present invention will be explained using FIGS. 1 to 3 corresponding to embodiments. The gear train of the motor 30 includes a sun gear 32, a planetary gear 33 supported by a rotating arm 34 so as to be able to revolve around the sun gear 32, and a plurality of transmission gears 35° 38 that selectively mesh with the planetary gear 33. In an electric drive camera having a planetary gear transmission switching mechanism consisting of the planetary gear 33
and the planetary gear 33 at the meshing position with one of the transmission gears 35.
The rotating arm 34 is held by a blocking means 37 such as a holding type magnet so as to prevent the rotational movement of the motor 30, and the forward and reverse rotations of the motor 30 can be transmitted to the one transmission gear 35. 37 by electromagnetic means,
For example, the planetary gear 33 is released by reverse excitation, causing the planetary gear 33 to revolve, and the transmission system is switched to the other transmission gear 38.

When the coil of the magnet serving as the blocking member 3T is not energized, the rotating arm 34 is held by suction and the planetary gear 33 does not revolve, so the driving force of the motor 30 in the forward and reverse directions is transferred to the sun gear 32. It is transmitted to the transmission gear 35 via the planetary gear 33 and rotated forward and backward. (Figures 1 and 2) On the other hand, the coil of the magnet 37 is energized and the magnet 3
7 is reversely excited, the attraction to the rotating arm 34 is released, and when the motor 30 reverses (rotates clockwise), the planetary gear 33 revolves counterclockwise around the sun gear 32 and transmits the signal. The motor 30 meshes with the gear 38, and the driving force of the motor 30 is transmitted to the transmission gear 38 and rotated. (FIG. 3) <Embodiment> Next, an embodiment of the present invention will be described based on FIGS. 1 to 5.

In FIGS. 1 to 3, reference numeral 1 denotes a first motor, which is installed inside a take-up spool 8, which will be described later, and has a pinion 2 fixed to its output shaft. 3 is a two-stage gear, the upper gear 3a meshes with the pinion 2, and the lower gear 3b meshes with the pinion 2.
It meshes with the lower gear 4b of the stepped gear 4. Reference numeral 5 denotes a planetary gear, which meshes with the upper gear 4a of the second gear 4 and is pivotally supported by the arm 6 so as to be able to revolve around the gear 4a as a sun gear, and which is connected to the lower gear 7b of the second gear 7 and the second gear 4. 9 can be selectively engaged with the upper gear 9a. The upper gear 7a of the second gear T meshes with the lower gear 8a of the winding system spool 8, and the lower gear 9b of the second gear 9 meshes with the charge gear 10. Reference numeral 11 denotes a charge lever, which is biased clockwise by a spring 12 and pivotably supported, and one end of which is in contact with a charge pin 10a protruding from the charge gear 10.

Reference numeral 13 denotes a sprocket, which is rotatably arranged to engage with the film perforation, and rotates once when one frame of film is transferred.A film detection disc 14 having a conductive pattern portion 148t is located at the bottom of the rotation shaft. It is provided. Reference numeral 15 denotes a film detection switch, which turns into ion when it comes into contact with the conductive pattern portion 1a. Reference numeral 16 denotes a shutter device, in which shutter blades 19 are opened and closed by the operation of a holding type magnet 17 for controlling the leading curtain and a holding type magnet 18 for controlling the trailing curtain. Reference numeral 20 denotes a holding type magnet for diaphragm control, which is held against a spring 22 that urges the diaphragm control pawl 21 counterclockwise when the magnet is not energized. 23 is a holding type magnet for autofocus control, and when the power is not energized, the focus control claw 2
4 is held against a spring 25 that urges it counterclockwise. Reference numeral 26 denotes a lens barrel, which is equipped with an aperture 27, and is controlled to a desired aperture value by engaging the aperture control claw 21 with a claw portion 28 of an aperture ring that interlocks with the aperture 27;
Further, an autofocus claw portion 29 of the focus ring is provided in conjunction with the autofocus mechanism, and focus control is performed when the claw portion 29 engages with the autofocus control claw 24. 30 is a second motor, and a pinion 31 is fixed to its output shaft. 3
2 is a two-stage gear, the lower gear 32b of which is connected to the pinion 31.
It meshes with. A planetary gear 33 meshes with the upper gear 32a of the two-stage gear 32 and is pivotally supported by the arm 34 so as to be able to revolve around the gear 32a as a sun gear.
The upper gear 35a of the stepped gear 35 and the upper gear 38a of the second gear 38 can be selectively engaged with each other. The lower gear 35b of the two-stage gear 35 meshes with a rack 36 that is interlocked with a zoom mechanism (not shown) inside the lens barrel 26. 37 is a holding type magnet having a coil 373t which serves as a blocking member, and when not energized, the arm 34
is held by suction to prevent the orbital movement of the planetary gear 33,
The planetary gear 33 and the upper gear 35a of the second gear 35 are kept in mesh with each other. The second gear 38 is
The lower gear 38b meshes with a rewind gear 39 that rotates integrally with the rewind fork 40.

Furthermore, FIGS. 4 and 5 show electrical circuits for operating the apparatus constructed as described above.

41 is a power supply, and a camera control circuit 42. A photometry circuit 43 and a distance measurement circuit 44 are connected to each other, and the photometry circuit 43. The output of the distance measuring circuit 44 is input to the camera control circuit 42. Further, the power source 41 includes a transistor Tr for the first motor 1.

A bridge circuit constituted by Tr, Tr, a coil 37a of a holding type magnet 37, a transistor Tr, a holding type magnet 17 for front curtain control, and a transistor Tr. , trailing curtain control magnet 18 and transistor Tr, 1. Holding type magnet 20 and l for aperture control
- transistor 12 + focus control holding type magnet 23 and transistor Tr, .

The series bodies are connected to each other, and the transistors Tr.

The bases of ~Tr, , are connected to the camera control circuit 42 via resistors ~R15t, respectively. The camera control circuit 42 also includes a switch swi corresponding to the film detection switch 15, and a switch sw2 that is turned on when the trailing curtain is completed and turned off when charging is completed.

Rewind start switch SW3, film movement switch SW that repeatedly turns on and off in conjunction with film movement
4, a telephoto side zoom switch SW5, a wide-angle side zoom switch 8W6, and a release switch 8W7 are connected, respectively.

Furthermore, FIG. 5 shows a motor drive and electromagnetic means drive circuit diagram in the camera control circuit 42.

In the same figure, the switch 8W1 is connected to the power supply through a resistor R+4ft, and is connected to the AND gate 5 through one input terminal of the AND gate 53.55 and an inverter 52.
8, respectively, and outputs its off signal, that is, the level. The switch 8W2 is connected to the power supply via the resistor Rts, and is also connected to the one-shot circuit 45, the timer circuit 49, and the other input terminal of the AND gate 58 via the inverter 57. The output terminal of the one-shot circuit 45 is connected to the inverter 61 and the transistor Tr via the resistor Rst'.
, the base and inverter 62. The output terminal of the timer circuit 49 is connected to the base of the transistor Tr via the resistor R1, and the output terminal of the timer circuit 49 is connected to the other input terminal of the AND gate 53 and the other input terminal of the AND gate 55 via the inverter 54. There is. The output terminal of the AND gate 53 is connected to the output terminal of the one-shot circuit 45 and is input to the AND gate 58 via an inverter 74. The output terminal of the AND gate 55 is connected to one input terminal of an OR gate 56, and the output terminal of the OR gate 56 is connected to the output terminal of the AND gate 58 and an inverter 59. The switch SW3 is connected to the base of the transistor Tr2 through the resistor R8 and the base of the transistor Tr2 through the inverter 60° resistor R''zk. The output of the OR gate 56 is still connected to the input S of the flip-flop 51.

The output terminal Q of the flip-flop 51 is connected to the one-shot circuit 47, one input terminal of AND gates 64 and 66 via an inverter 63, and one input terminal of an OR gate 65, respectively. The output terminal of the AND gate 64 is connected to the base of the transistor Tr through a resistor "of", and the output terminal of the AND gate 64 is connected to the other input terminal of the OR gate 65.
W4 is connected to the timer circuit 50, and its output terminal is connected to the input terminal R of the flip-flop 51 and the one-shot circuit 48.
and the output 11111 of the AND gate 66, respectively.

The zoom switch SW5 on the telephoto side is connected to the power supply via a resistor R+ak, and is also connected to the other input terminal of the AND gate 66 via an inverter 72, and the zoom switch SW6 on the wide-angle side is connected via a resistor R+ak to the other input terminal of the AND gate 66. It is connected to a power source and to the other input terminal of the AND gate 64 via an inverter 71.The output terminal of the AND gate 66 is connected to the base of the transistor Tr via an inverter 67 and a resistor. Inverter 68
．． The output terminal of the OR gate 65 is connected to the base of the transistor Tr7 through a resistor R1''fI, and the base of the transistor Tr7 through a resistor R1''fI. and the base of the transistor Tr through a resistor Rat''.

° In addition, D+, the diode connected between both poles of the Dz Fi motor 1 and the negative pole of the power supply 41,
3°D4 are diodes connected between both poles of the motor 30 and the negative pole of the power source 41, respectively.

Therefore, the operation of this embodiment will be explained.

In FIG. 1, a film cartridge (not shown) is loaded onto a full rewind fork 40, a part of the film leader is attached to the spool 8, the back cover is closed, and the film is moved by the motor 1 to the pinion 2. It is fed by a predetermined amount through gears 3° 4, 5, 7 and 8a, and then stopped to prepare for photographing.

Next, when the release switch SW7 is turned on by the release operation, the photometry circuit 43. When the distance measuring circuit 44 is turned on, the camera is activated, and autofocus operation and aperture control operation are started. The output of the distance measuring circuit energizes the autofocus control holding type magnet 23, and the focus control claw 24 rotates clockwise due to the biasing force of the spring 25 and engages with the autofocus claw portion 29 of the focus ring. This completes the autofocus operation. At the same time, when the aperture value determined by the output of the photometry circuit 43 is reached, the aperture control holding type magnet 2
0, the diaphragm control pawl 21 rotates υ counterclockwise by the biasing force of the spring 22, and engages with the pawl portion 28 of the diaphragm element, thereby completing the diaphragm operation.

When the autofocus operation and the aperture operation are completed, the holding type magnet 17 for controlling the front curtain is energized to start the front curtain, and after the required exposure time has elapsed, the holding type magnet 18 for controlling the trailing curtain is energized, and the holding type magnet 18 for controlling the rear curtain is energized. When the curtain starts, the film is exposed, and the second curtain completes running, switch 8 is pressed.
W2 turns on.

When the switch SW2 is turned on, the one-shot circuit 45
is turned on, the transistor Tr is turned off via the inverter 61 due to the high level output, and at that time,
Switch SW4 is on, but inverter 74
Since the low level output is input to the AND gate 58 via The motor 1 rotates forward (clockwise in FIG. 1) for a predetermined period of time. Then, pinion 2. The planetary gear 5 meshes with the lower gear 7b of the two-stage gear 7 via the gears 3 and 4, transmits the driving force of the motor 1 to the spool 8, and winds the film by 5 degrees. The sprocket 13 is rotated by the film, and the conduction between the conductive pattern portion 14a of the film detection disc 14 and the film detection switch 15 is broken, and the switch SW1 is turned off. Then, the time of the one-shot circuit 45 is determined by the time when the motor 1 starts rotating and the switch S
The time required until W1 turns off may be sufficient.

Furthermore, when the switch 8W2 is turned on, the timer circuit 49
turns on. The timer circuit 49 has a timer time set to be slightly longer than the normal film winding operation time. Therefore, even if the output of the one-shot circuit 45 disappears, the high level output of the timer circuit 49 and the sprocket 1
When the rotation switch SW1 of the motor 3 is turned off, the AND gate 53 outputs a high level output, and the motor 1 continues to rotate normally.

When the transfer of one frame of film is completed, the switch SW1 is turned on again, so the output of the AND gate 53 becomes low level, and the transistor Tr3i! Off, transistor Tr is on, motor 1° transistor Tr4. The motor 1 is stopped due to the short circuit of the diode D1.

As mentioned above, when the film winding is completed, switch S
When WI is turned on, a high level signal is input to the AND gate 58 via the inverter 52, and since the output of the AND gate 53 becomes low level, the NO level output is input to the AND gate 58 via the inverter 73. is input, and at that time, switch SW2 is in the on state, so
The output of the AND gate 58 becomes high level, and the transistor Tr is turned on via the inverter 59. Also, since the transistor Tr4 is on, a current flows in the opposite direction to the motor 1, causing the motor to reverse. When the motor 1 reverses, the planetary gear 5 shifts to the upper gear 4 of the second gear 4, as shown in FIG.
It revolves with a as a sun gear, and the upper gear 9a of the second gear 9
The driving force of motor 1 is applied to pinion 2. gear 3,4
, 5. It is transmitted to the charge gear 10 via the two-stage gear 9, and the charge lever 11 is rotated by the charge pin 10a against the force of the spring 12, and the connection mechanism (not shown) is fully connected to the autofocus mechanism. Camera mechanisms such as the diaphragm mechanism and the shutter mechanism, except for film feeding, are charged, and the magnets 17, 18, 20, and 23 are set to the attracted and held state. Then, when the charging is completed with one rotation of the charging gear 10, the following occurs.

The switch SW2 is turned off. When the switch SW2 is turned off, the AND gate 5
Since a low level is input to the transistor 8 and its output becomes a low level, the transistor Tr is turned off via the inverter 59, and the transistor Tr is turned off via the inverter 60.
, are turned on, transistor p1, transistor Tr2. The motor 1 is stopped by the short circuit of the diode D2, and the film advance and camera charging operations are completed. Therefore, if you keep pressing the release button, continuous shooting will be performed by repeating the above-mentioned operation.

Here, when the telephoto side zoom switch SW5' is turned on, the two-man power of the AND gate 66 becomes high level,
The output is at a high level, and the transistor Tr is turned on via the inverter 67. On the other hand, the OR gate 6
5 outputs a low level, the transistor Tr is not turned on via the inverter 70, and current flows from the power supply to the transistor Tr to the motor 30 to the transistor Tr, and the motor 30 rotates in the normal direction. .

In the normal photographing state shown in FIG. 1, the arm 34 is attracted and held by the holding type magnet 37, so the planetary gear 33 is in mesh with the upper gear 35a of the second gear 35. Therefore, when the motor 30 rotates forward, the pinion 3
1. The driving force is transmitted via gears 32, 33.degree. 35 to a rack 36 that is interlocked with the zoom mechanism, and zooming is performed toward the telephoto side. When the switch sws2 is turned off, the AND gate 66 outputs a low level and the transistor Trs
l'l: Off, Tr6 is not on, motor 30. Transistor Tr6. The motor 30 is stopped due to the short circuit of the diode D4.

Also, when the wide-angle side zoom switch SW6i is turned on,
The output of the AND gate 64 becomes high level, the output of the OR gate 65 also becomes high level, and the AND gate 6
Since the output of 6 is low level.

Transistor 'I''r7. Tr6 is turned on and the motor 30 is reversed. As a result, the motor 30 is
The driving force is transmitted to the rack 36, and zooming is performed to the wide-angle side. In this way, zoom switch SW5.

Power summing is performed by turning sw6'o on and off. This zooming operation is the film winding operation mentioned above,
It can be operated independently of the camera charging operation, and it is also possible to perform zooming operations while winding the film to determine the angle of view and immediately release the camera. Additionally, you can easily take special photos by performing a zooming operation while the shutter is opening so that the image flows toward the center.

Next, when the film is finished, the switch SW2 is turned on to start winding the film, but the switch SWI is not turned on forever. Therefore, timer circuit 49
When the timer time elapses, the output of the AND gate 53 becomes low level, the transistor Tr3 is turned off, the transistor Tr is turned on, and the motor 1 is stopped. At the same time, the output of the AND gate 55 becomes high level, and when the output of the OR gate 56 becomes high level, the one-shot circuit 46 is turned on for a moment, transistors Tr, Tr4 are turned on, and the motor 1 is reversed for a predetermined period of time. As shown in FIG. 3, the planetary gear 5 revolves around the lower gear 7b of the second gear 7.
The spool 8 cuts off power transmission to the motor 1.

Further, the flip-flop 51 is also set by the high level output of the OR gate 56, and its output is set to a high level, the one-shot circuit 47 is turned on for a predetermined time, the transistor Tr is turned on, and the coil 37H of the holding type magnet 37 is turned on. Turn on the power and apply reverse excitation. At the same time, the output of the OR gate 65 becomes high level, and the output of the AND gate 66 becomes low level, so the transistor Tr
,.

Tr is turned on and the motor 30 rotates in reverse.

As a result, the holding force of the magnet 37 against the arm 34 is deenergized and the motor 30 is rotating in reverse, so the planetary gear 33 revolves counterclockwise as shown in FIG. 38a, and the driving force of the motor 30 is transmitted to the rewinding fork 40 via the rewinding gear 39, thereby rewinding the film. At this time, since the spool 8 is separated from the transmission system with the motor 1 as described above, the unwinding load is only the film load, and unwinding is performed without waste.

This rewinding operation causes the film movement switch 8VV4 to turn on and off repeatedly, resetting the timer circuit 50 each time. When the film rewinding is completed and the film movement switch SW4 is no longer turned on or off, the flip-flop 51 is reset by the output of the timer circuit 50, the output of the OR gate 65 becomes low level, the transistor Tr7 is turned off, and the transistor Tr7 is turned off. Tr is turned on and the motor 30 is stopped. One shot circuit 4 at the same time
8 is also turned on, transistor Tr is turned on, and motor 3 is turned on.
0 rotates forward only for a predetermined time, and the planetary gear 33 rotates in the second gear 35.
revolves clockwise until it meshes with the upper gear 35a, while the transistor Tr is turned off and the magnet 37
Since the arm 34 is not energized, the magnet 37
held by.

Note that during film rewinding, the output signal of the inverter 63 causes the outputs of the AND gates 64 and 66 to be at a low level regardless of the zoom switches 8W5 and SW6.
Even if I operate W6, there is no reception.

Also, when rewinding the film in the middle, turn on the rewind start switch SWa, and the OR gate 5
When the output of No. 6 becomes high level, rewinding is performed. When the rewinding is completed, the motor 30 is automatically connected to the zoom drive system, so the zoom switches sws and sw6 have no adverse effect on the rewinding.

FIG. 6 is a diagram showing the main part of a switching mechanism between a zoom mechanism and a rewind mechanism according to another embodiment of the present invention.

In the first embodiment described above, the arm 34 supporting the planetary gear 33 was directly attracted and held by the holding force of the permanent magnet 37, but in this embodiment, the arm 34 is held by a locking lever. Incidentally, the same parts as those in the previous embodiment are given the same reference numerals, and the explanation thereof will be omitted, and only the different points will be explained.

That is, the locking lever 81 is biased counterclockwise by a spring 82, and locks the arm 34 at a position where the planetary gear 33 supported by the arm 34 meshes with the two-stage gear 35 that transmits the zoom mechanism. However, by energizing the suction type magnet 83, the entire locking lever 81 is attracted against the biasing force of the spring 82, and the locking lever 81 is released from the arm 34, and the planetary gear 33 is wound. It is made to be able to revolve so as to mesh with a two-stage gear 38 that is transmitted to the return system. Also, 8
Reference numeral 4 designates a stopper that restricts the arm 34 to the zoom drive side position, and 85 also represents a stopper that restricts the arm 34 to the rewind drive side position.

Therefore, when the planetary gear 33 is connected to the zoom drive system, the arm 34 is fixed on both sides by the stopper 84 and the locking lever 81, so that the revolving force due to the forward and reverse rotation of the motor or the zoom 1 drive is limited to telephoto or wide angle. It is possible to reliably maintain the revolving force when it is carried out to the end. In addition, when rewinding, when the suction type magnet 83 is energized, the locking lever 81 is attracted and released from the arm 34, and the planetary gear 33 revolves and meshes with the second gear 38. It will be done.

Also, as in the previous embodiment, two motors are used,
By arranging motors on both sides of the optical axis, the motor on the spool side winds the film and charges the camera, and the motor on the rewind fork side drives the zoom and rewinds the film. Since the driven part is located close to the motor, the transmission efficiency of the gear train is also very good.

In the embodiment, one of the driven parts is driven in forward and reverse directions, and the other driven in one direction, but it is also possible to provide planetary gear revolution prevention means on both to drive both driven parts in forward and reverse directions.

<Effects of the Invention> As explained above, the present invention uses a planetary gear mechanism in the motor drive system to enable forward and reverse drive by means of revolution prevention means, and also releases the prevention means using electromagnetic means to switch the transmission system. One motor can independently drive forward and reverse drives and other driven parts. Furthermore, when switching, it is sufficient to change the switch, and there is no need for manual operation, which greatly improves operability, and when combined with an electric circuit, automatic switching becomes possible. In addition, the camera can effectively utilize the small space of the camera and can be configured at low cost.

[Brief explanation of drawings]

1 to 3 are schematic perspective views of an electrically driven camera showing an embodiment of the present invention, in which FIG. 1 shows the film winding and zoom drive state, FIG. 2 shows the camera charging state, and FIG. 3 shows the film winding state. 4 is a block circuit diagram for operating the camera, FIG. 5 is a motor drive and electromagnetic means drive circuit diagram in the circuit of FIG. 4, and FIG. 6 is another embodiment of the present invention. FIG. 2 is a configuration diagram of a transmission system switching mechanism. DESCRIPTION OF SYMBOLS 1... First motor, 5... Planetary gear, 8... Spool, 10... Charge gear, 11... Charge lever, 13... Sprocket, 16... Shutter device, 26゛°° Lens barrel, 30... Second motor, 33... Planetary gear, 34... Arm, 36...
Rack interlocked with zoom mechanism, 37... Holding type magnet, 37a... Coil, 40... Rewinding fork, 81... Locking lever, 82... Spring, 83...
...Suction type magnet, 84.85...stopper

Claims (1)

[Claims] 1. In an electrically driven camera having a planetary gear transmission switching mechanism in a motor gear train consisting of a sun gear, a planetary gear, and a plurality of transmission gears that selectively mesh with the planetary gears, the meshing of at least one pair of planetary gears with the transmission gear An electrically driven camera characterized in that forward and reverse rotation of the motor is transmitted to the transmission gear by a blocking means for blocking the orbital movement of the planetary gear at certain positions, and the blocking means is released by electromagnetic means to switch the transmission system.