JPS5921007B2 - camera electric drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric drive device for a camera, and more particularly to an electric drive device for a camera that can sequentially repeat a winding operation for charging a shutter, winding a film, etc., and a shutter release operation.

When taking a photograph, it is essential that the film be exposed immediately after pressing the shutter release button.

In recent cameras, various improvements have been made, and various operations such as aperture determination using the exposure meter, automatic aperture, mirror up, etc., are performed from the time the release button is pressed until the film is actually exposed. It seems like it is being done. However, on the other hand, this means that the time delay between actuating the release button and actually exposing the film has increased. In particular, when taking pictures with an electric drive device attached to the camera, it is necessary to operate the release start member in the electric drive device, transmit the release signal to the camera body side, and then operate the release button on the camera body side. , the above-mentioned time delay is becoming larger and larger. For example, in a conventional electric drive device, one cycle from the release operation to the winding operation is controlled by rotating a rotating member within the device once, but in this case, when the winding is completed, that is, the release is The stopping position of the rotating member in the standby state is regulated by a locking member, and at the time of release, a release start member in the electric drive device is actuated to escape the locking member and rotate the rotating member. This has the disadvantage that a considerable time delay occurs because the shutter release is performed by the shutter release. In addition, in the electric drive device configured as described above, when the voltage of the power supply in the electric circuit of the device decreases, the driving force of the electric motor that causes the aforementioned locking member to escape is weakened, and therefore, the aforementioned time period is reduced. The drawback was that the delays were increasing. The present invention solves the above-mentioned drawbacks and improves the electrical circuit j.
The shutter release button of the electric drive device is actuated by keeping the stop position of the rotating member, which has the above-mentioned function, in the release operation waiting state always constant regardless of any fluctuations in the power supply voltage within the camera. The purpose of this device is to provide an electric drive device for a camera that can eliminate the time delay until the release is performed. An electric motor connected to a rotating member that controls winding operation and shutter release operation is electrically controlled to stop the rotating member accurately at a position where the shutter release operation is expected, and the electric drive device The braking start timing of the motor is controlled by a delay time circuit that can change the control start timing depending on the voltage state of the power supply, and the stopping position of the circuit member in the state in which the shutter release operation is expected is determined by the voltage state of the power supply. The reason lies in the fact that it is made so that it always remains constant regardless of the situation.

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

1 to 5 are diagrams showing the configuration of the main parts of the electrode driving device according to the present invention.
The structure of the mechanism for performing shutter charge, etc. and shutter release will be explained. In FIG. 1, M is a motor as a driving source, and this motor M is a slip mechanism 1,
A gear system 5 as a rotating system is driven via gear trains 2, 3, and 4. The bevel gear 3 and the spur gear 4 are a one-way clutch 5
6, and the one-way clutch 56 transmits the driving force of the motor to the gear 4 only when the motor M rotates in the direction of arrow A in FIG. The gear system 5 includes a gear 6 as a rotating member, and four planetary rotating bodies rotatably supported by four shafts 59 fixed on the gear 6 with a phase difference of, for example, 90 degrees. It consists of a planetary gear 7 as a planetary gear 7, and sun gears 8 and 9 as first and second sun rotating bodies meshing with the planetary gear 7. The gear 6 meshes with the gear 4, and a fixed shaft 57 is provided with a reversal prevention spring 58 to prevent the gear 6 from reversing (rotation in the opposite direction to the arrow). The planet gear 7 revolves around the sun gears 8 and 9 as the gear 6 rotates. A cam 10 is fixed to the end surface of the fixed hollow shaft 60 of the second sun gear 9, and the cam 10 has an active end 10a and an upper surface thereof.
A η pin 61 is fixedly provided. Further, a shaft 62 is fixed to the first sun gear 8, and the shaft 62 is connected to the second sun gear 9.
The hollow shaft 60 is rotatably inserted and extends, and the winding connection member 11 is engaged with the extending end.

The winding connecting member 11 has a notch 11b for connecting to a winding shaft on the camera body side (not shown) and a long hole 11a on the side surface.
A pin 12 fixedly attached to the side surface of 2 engages with the pin 12, thereby allowing the winding connection member 11 to slide in the vertical direction.
13 is a compression coil spring provided between the winding connection member 11 and the electric drive device housing.

The first and second sun gears 8 and 9 are constructed such that the difference in the number of teeth thereof corresponds to a multiple of the number of planetary gears, and in this embodiment, the number of teeth of the first sun gear 8 is has four more teeth than the second sun gear 9 (because the meshing pitch circles match, the first and second sun gears 8 and 9 are shifted so that they can mesh with the planetary gear r). It's summery.

). Regarding the relationship between the planetary gear 7 and the first and second sun gears 8 and 9, when the gear 6 rotates in the direction of the arrow in FIG. 1, the second sun gear 9 is prevented from rotating. Then, the first sun gear 8 also rotates in the direction of the arrow, and the first sun gear 8
When the rotation of the second sun gear 9 is blocked, the second sun gear 9 rotates in the direction opposite to the direction indicated by the arrow. Furthermore, when both sun gears 8 and 9 are released from the restraint and one of them is driven to rotate, both sun gears 8 and 9 will have a speed difference corresponding to the difference in the number of teeth, independent of the rotation of gear 6. It can be rotated freely while maintaining the same. Therefore, if the second sun gear 9 is prevented from rotating and the planetary gear 7 is made to make one revolution with respect to the second sun gear 9, the first sun gear 8 will move in the direction indicated by the arrow in FIG. direction from the absolute position by the difference in the number of teeth (4 teeth) with the second sun gear 9, thereby rotating the winding connection member 11. This planetary gear 7 is 1
This is achieved by the first sun gear 8 rotating by the difference in the number of teeth when it revolves. The first sun gear 8 rotates a winding shaft (not shown) on the camera body side via a winding connecting member 11, thereby performing winding operations such as shirt charge and film winding. At this time, a locking member (not shown) may be provided in the winding mechanism on the camera body side, and the locking member may be configured to prevent movement of the winding mechanism on the camera body side when the winding operation is completed. For example, the camera body side winding shaft (not shown) is prevented from rotating when the winding operation on the camera body side is completed, and therefore the rotation of the first sun gear 8 is also prevented. As a result, the second sun gear 9 now rotates in the direction opposite to the direction indicated by the arrow. Reference numeral 14 denotes a regulation lever for regulating the rotation of the second sun gear 9. The lever 14 is rotatably supported by a fixed shaft 65 of the electric drive device housing, and one of the protruding parts 14a A shaft 63 rotatably supports a roller 64 that can be engaged with the working end 10a of the cam 10, and a U-shaped elongated hole 14b is provided in the other protrusion of the lever 14. It is formed.

A pin 66 fixed on the sliding plate 15 is engaged with the elongated hole 14b, and the sliding plate 15 has its guide holes 15a, 1
Fixed pins 17 of the electric drive device housing that engage with each of 5b
, 67, and has a bent portion 1 at one end thereof.
5c, and is biased in the direction of arrow C in FIG. 1 by a spring 16 provided between the bent portion 15c and the pin 17. The sliding plate 15 further has a protrusion 15d, and a pin 68 is fixed to the other protrusion. 18
is a first interlocking lever that is rotatably supported by a shaft 69 fixed to the electric drive device housing, one end 18a of which is in contact with the fixed pin 68 of the sliding plate 15, and the other end of which is rotatably supported. An L-shaped bent portion 18b is provided.

Reference numeral 19 denotes a second interlocking lever rotatably supported by a shaft 70 fixed to the electric drive device housing, one end of which is 19a.
is locked by a bent portion 18b of the first interlocking lever 18, and the other end 19b engages with a lower groove 20a of a release bar 20, which will be described later.

As described above, the release rod 20 has a lower groove 20a for engaging with the second interlocking lever 19, and an active end 20 for operating the shutter release member on the camera body side (not shown).
b, and is slidable in the vertical direction guided by a cylinder 71 fixed to the electric drive device housing, and is normally biased downward in FIG. 1 by a spring 21. . Accordingly, the release bar 20 is pushed up against the spring 21 via the first and second interlocking levers 18 and 19 as the sliding plate 15 moves in the direction of arrow C in FIG. This actuates a release member on the camera body side (not shown). Reference numeral 23 denotes an engagement lever, which is rotatably supported by a fixed shaft 72 of the electric drive device housing, and is normally biased by the spring 22 in the direction opposite to the direction indicated by the arrow.

The engagement lever 23 has a protrusion 23a that can engage with the protrusion 15d of the sliding plate 15, and a bent piece 23b for operating a counter feeding member 29 (shown in FIG. 2), which will be described later. .

73 is a pin fixed to the upper surface of the engagement lever 23, and the pin 73 is a common movable contact piece S56b of the switches S5 and S6.
is operated to control the on/off of switches S5 and S6.

74 is a pin fixed to the lower surface of the engagement lever 23;
One arm 24 of the letter-shaped lever 24 is rotatably supported on the pin 74 by a fixed shaft 76 of the electric drive device housing.
a can be contacted.

The other arm 24b of the V-shaped lever 24 projects above the cam 10 and is engageable with a fixed pin 61 on the cam 10.
Further, rotation of the letter-shaped lever 24 in the direction opposite to the direction of the arrow in FIG. 1 is restricted by a pin 75 fixed to the electric drive device housing. When the protrusion 23a of the engagement lever 23 is engaged with the protrusion 15d of the sliding plate 15, the common movable contact piece S56b of the switches S5 and S6 relies on its own elastic force to close the fixed contact of the switch S5. Although the switch S5 is turned on and the switch S6 is turned off by contacting the piece S5a,
When the lever 23 is rotated by the V-shaped lever 24 against the spring 22 in the direction of arrow H, the common movable contact piece S56b uses its own elasticity due to the fixed pin 73 of the engagement lever 23. It is pushed against the force, turning off the switch S5. The switch S6 engages the engagement at the time when the rotational displacement of the engagement lever 23 in the direction of the arrow H reaches its maximum (that is, at the time when the rotational displacement of the letter-shaped lever 24 in the direction of the arrow W reaches its maximum). It is turned on only when the fixed pin 73 of the lever 23 causes the common movable contact piece S56b of the switches S5 and S6 to come into contact with the fixed contact piece S6a of the switch S6.
When the engagement lever 23 is disengaged between the fixed pin 61 of the cam 10 and the arm 24b of the V-shaped lever 24, the engagement lever 23 immediately rotates in the direction opposite to the direction indicated by the arrow C by the margin angle due to the action of the spring 22. Since the common movable contact piece S56b returns to its original position, it immediately releases contact with the fixed contact piece S6a due to its own elastic force. Therefore,
The switch S6 is a switch that is momentarily turned on in response to the movement of the figure-shaped lever 24. Tl, t2, t3, t4 are terminals t'1, t"2, t"3, t"4 on the camera body side
This is a terminal electrically connected to (shown in FIG. 7). Next, the film counter mechanism will be explained.

In FIG. 2, a film disc 25 is rotatably supported by a counter shaft 26 fixed to the housing of the electric drive device, and a ratchet wheel 25a is formed around the counter shaft 26. The number board 25 is biased around the counter shaft 26 in the direction of arrow R by a spring 27, and therefore, the claw portion 32a of the feed claw 32 and the locking claw 34a of the locking lever 34, which will be described later, are connected to each other. When the engagement with the ratchet wheel 25a is released, the number plate 25 is moved by the spring 27 until the protrusion 25b thereof is locked by a pin 28 fixed to the electric drive device housing.
It is rotated in the direction of arrow R by the action of . Further, when the number board 25 reaches the position where it is locked by the pin 28, the character "36" on the number board 25 is configured to match the counter index C-1. The counter feed member is rotatably supported by the counter shaft 26 and is biased by a spring 30 in the direction of arrow N.

Reference numeral 29a denotes a bent portion of the counter feeding member 29, and the bent portion 23b of the aforementioned engagement lever 23 (shown in the first figure) is in contact with the bent portion 29a. Matching lever 2
3 is rotated around the shaft 72 in the direction of arrow H against the spring 22, the counter feed member 29 moves against the spring 3.
0 and rotates around the shaft 26 in the direction opposite to the arrow ``nu''.

31 is a notch 2 around the counter feeding member 29.
9b, an eccentric pin is fixed to the electric drive device housing to restrict rotation of the counter feed member 29 in the direction of the arrow ``nu''.

Reference numeral 32 denotes a feed pawl, which is rotatably supported by a pin J mo V fixed on the counter feed member 29, and is attached around the pin J mo V in the direction of the arrow R by a spring 33. Forced.

The feed pawl 32 engages with the ratchet wheel 25a of the sheet counting board 25, and the counter feeding member 29 rotates in the direction opposite to the direction of the arrow N, thereby moving the sheet counting board 25 against the spring 27 in the opposite direction to the direction of the arrow R. The claw portion 32a. ' and the bent part 32b
and has. Reference numeral 34 is a locking lever that is rotatably supported by an eccentric pin 35 fixed to the electric drive device housing and biased around the pin 35 in the direction of arrow O by a spring 36.

The locking lever 34 is provided with a locking pawl 34a, which engages with a ratchet wheel 25a of the number plate 25 and causes the number plate 25 to move in the direction of arrow R under the action of the spring 27. Prevent rotation. Therefore, the advance of the number board 25 is performed as follows.

That is, as the counter feed member 29 rotates around the counter shaft 26 in the direction opposite to the arrow ``N'' to the position where it is regulated by the pin 31 in the notch 29b, the feed pawl 32 moves its pawl. The number plate 25 is advanced by one frame of film in the opposite direction to the arrow 32a. (The locking claw 34a of the locking lever 34 is connected to the ratchet wheel 25a of the number plate 25.
With respect to the rotation in the direction opposite to the arrow , the number board 25 is always in the escape direction, so the number board 25 can be rotated clockwise. )
Next, due to the action of the spring 30, the counter feeding member 2
9 rotates in the direction of the arrow and returns to its original position, so the feed pawl 32 also returns to its original position, but the number board 25 is locked by the locking pawl 34a of the locking lever 34. , maintain the position where the film is advanced by one frame. The bent portion 32b of the feed pawl 32 is formed to extend above the locking lever 34, so that the locking lever 34 can be moved around the pin 35 against the spring 36 in the direction opposite to the arrow O. When rotated, the feed pawl 32 is pushed up by the locking lever 34 and rotated against the spring 33 around the pins J and V in the direction opposite to the direction indicated by the arrow.

As a result, the number plate 25 is connected to the ratchet wheel 25a and the locking lever 3.
Since the locking pawl 34a of No. 4 and the pawl portion 32a of the feed pawl 32 are both disengaged, the character "36" on the number plate 25 changes to the counter index C by the action of the spring 27. It rotates in the direction of arrow R to the position corresponding to -1.Also, there is a missing part 25 of the pawl in the pawl wheel 25a of the number plate 25.
c is formed, and when this counter is not used (for example, when using a long film magazine), the claw portion 32a of the feed claw 32 can be positioned in the cutout portion 25c of the claw. (At this time, the counter index C-1 is configured so that the characters "F-C" on the number board 25 match.) When the claw portion 32a of the feed claw 32 is located in the cutout portion 25c of the claw, the rotation of the counter feed member 29 is not transmitted to the sheet number board 25, and therefore the sheet number board 25 does not advance. . SlOa has 25 discs.
The contact piece SlOa also constitutes an automatic stop switch SlO (not shown in Figure 6), and the contact piece SlOa is in contact with the back surface of the number board 25.

As shown in FIG. 4, the back surface of the number board 25 has an electrically insulating member 25d embedded in a part of the contact rotation area of the contact piece SlOa, and the number board 25 is a good electrical conductor and also serves as a counter shaft. 26 etc., the switch SlO is on when the contact piece SlOa is on the conductive part of the number board 25, but the contact pieces S and Oa are If it is above the insulating member 25d, switch S
lO is turned off. Therefore, the contact piece S,. a is insulating member 2
If the phase arriving on the number plate 5d is configured to be the phase when the letter "O" on the number board 25 matches the counter index C-1, the switch SlO will match the character "O" on the number board 25.
] corresponds to the counter index C-1, that is, when a predetermined number of films have been photographed, it becomes an automatic stop switch that is automatically turned off. 48 is a counter set dial, which is rotatably supported by the counter shaft 26 and urged by a spring 49 in the direction of the arrow force.

A convex portion 48a that can engage with the concave portion 25e of the number board 25 is formed at the end of the counter set dial 48.
After pushing the counter set dial 48 against the spring 49 and engaging the convex part 48a of the counter set dial 48 with the concave part 25e of the number plate 25, the counter set dial 48 is rotated around the counter shaft 26 by an arrow arrow. By rotating the number board 25 in the opposite direction, the number board 25 can be set at any desired position. Next, the structure of the electric film rewinding mechanism will be explained.

In FIG. 1, 2a is a gear integrally constructed with the bevel gear 2, and the gear 2a forms a gear train together with gears 37 and 38. A worm gear 39 is provided integrally with the gear 38, and the worm gear 39 meshes with a worm wheel 40 rotatably supported by an unwinding shaft 41.

The worm wheel 40 has a protruding cylinder 40a as shown in FIG. 2, and a pin 7 is provided on the outer peripheral surface of the protruding cylinder 40a.
8 is fixed. A pin 79 is fixed to the upper side surface of the rewinding shaft 41, and a cylinder 80 having a clutch hole 80a is fixed to the lower end thereof. A spring 42 is provided between the cylinder 80 and the electric drive device housing, and the unwinding shaft 41 is urged downward in FIG. 2 by this spring 42. Reference numeral 50 denotes a rewinding engagement member supported by the upper extending end of the rewinding shaft 41, which has a claw portion 50b for connection with a film cartridge (not shown) and a long groove 50a on the side surface.
A fixed pin 79 of the rewinding shaft 41 engages with the long groove 50a.

As a result, the rewinding engagement member 50 is movable in the vertical direction in FIG. Reference numeral 51 denotes a compression coil spring provided between the rewinding engagement member 50 and the disk portion 41a of the rewinding shaft 41.

A flange 43 is rotatably supported by the lower extending end of the unwinding shaft 41.

44 is a substantially Y-shaped lever integrated with the rewinding lever 81, and the protruding end 44c of one arm 44a is in contact with the back surface of the disk 43a of the flange 43, and furthermore, there is a 8 on the side surface of the protruding portion.
2 is permanently installed.

Further, a pin 83 is fixedly installed on the base extending end 44d of the substantially Y-shaped lever 44, and these pins 82 and 83 act as forward/reverse switching switches for controlling the forward/reverse direction of the motor M, respectively. Controls S7 and S'7. The switch S7,
Each movable contact piece S7a, s'7a of S'7 is normally connected to the husband F,
When the substantially Y-shaped lever 44 is rotated around its fixed shaft 84 in the direction of the arrow y, each of the switches S7 and S'7 is moved by the pins 82 and 83. The contact pieces S7a and s'7a are switched from the F and Y sides to the R and R'' sides, respectively. 52 is a lock spring for preventing malfunction of the rewind lever 81, and one end 52a of the lock spring is fixed to the electric drive device housing. In addition, fixed pins 85 and 86 are provided at the other end.

The pin 85 is normally arranged so as to lock the other cam-shaped arm 44b of the substantially Y-shaped lever 44, and only when the pin 86 is pushed in against the elastic force of the lock spring 52 itself, the pin 85 is locked. 85 is released to enable rotation of the substantially Y-shaped lever 44 in the direction of the arrow y. Reference numeral 45 denotes a communication lever, which is rotatably supported by a shaft 46 fixed to the electric drive device housing and biased by a spring 47 in the direction of arrow W.

Pins 87 and 88 are fixed to both ends of the communication lever 45, respectively, for rotatably supporting rollers 89 and 90. The rollers 89 and 90 are connected to the cam surface 44e of the cam-shaped arm 44b of the substantially Y-shaped lever 44 and the locking lever 34, respectively.
It engages with the protrusion 34b of. 54 is a pin for operating a sprocket release button on the camera body side (not shown), and is supported by a cylinder 55 so as to be movable up and down in FIG.

A shaft 91 is fixed to the pin 54 through a long hole 55a on the side of the cylinder 55, and rotatably supports a collar 92, and the collar 92 engages with the protruding end 34c of the locking lever 34. do.

Therefore, as the locking lever 34 rotates around the pin 35 in the direction opposite to the arrow O, the pin 54 is pushed upward in FIG. 2 via the collar 92 and the shaft 91, not shown. The sprocket is released by operating the sprocket release button on the camera body side. Reference numeral 53 denotes a selector dial, which is rotatably supported by the electric drive device housing, and has a flange 93 fixed to its shaft 53a.

The flange 93 has a bent portion 93a and a fixed pin 94,
The bent portion 93a turns on/off the main switch SM (shown in FIG. 7) for the camera body, and the pin 94 turns the main switch S2 of the electric drive device and the switch S8 for switching between "continuous shooting" and "single shooting". It controls the on/off of
These three switches SM, S2, and S8 are controlled by the position of the selector dial 53 as shown in Table 1. FIG. 6 shows an electric circuit suitable for the electric drive device according to the present invention, and its configuration will be explained.

In the figure, E is a power supply, M is a motor, S2, S7, da,
, S8, and SlO are the switches mentioned in the explanation of FIG. 2, and S5 and S6 are the switches mentioned in the explanation of FIG. 1. S1 is a release switch provided in the electric drive device or the release unit of the electric drive device (Fig. 7), S3 is a release switch used when mechanically releasing from the outside, such as a cable release, and S4
S is a switch that is linked to the shutter on the camera body (not shown), and S is a switch that is linked to the shutter on the camera body (not shown).
This is a switch that turns off when -C is installed. j Transistors Trl, Tr2, resistors R3, R4 constitute a release holding circuit, C1 is a capacitor for preventing malfunction, and resistor R2 and constant voltage diode ZDl are used to set the sensitivity of the external signal input from jack J. It is something.

That is, when the release switches S1 to S3 are turned on, the base current of the transistor Trl flows through the resistor R2 and the constant voltage diode, thereby turning on the transistor Trl and energizing the relay RLl. 1
1 is always N. The contact piece connected to the C side is affected by the relay RLl and is connected to the N. Connected to O side.

When the contact piece 1 is connected to the N, O side and the contact piece 12 is connected to the b side, one end of the resistor R4 is connected to the negative side of the power source E, and therefore the transistor Tr ,,Tr
2 has a self-holding function, and even if the release switch S or S3 is turned off, the transistors Trl and
Tr2 maintains a conductive state and turns on relay RLl. A delay circuit when the voltage of the power source E decreases is configured by the resistors R9 and RlO, the variable resistor RVl capacitor C5, the oscillation element PUT, and the constant voltage diode ZD2. That is, when switch S5 is turned on, transistor Tr4
is turned on, charge is accumulated in capacitor C4, and this charge is accumulated in capacitor C5VC via variable resistor RV and resistor R9. When the charging voltage of the capacitor C5 exceeds the gate potential of the oscillation element PUT, the oscillation element PUT is turned on and a pulse is output from its cathode. This pulse turns on the transistor Tr5 for a moment, energizing the latching relays RL2b and RL3b. Here, the gate potential of the oscillation element PUT is determined by the constant voltage diode ZD2. Therefore, the charging time of the capacitor C5 depends on the voltage of the power source E due to the constant voltage diode ZD2. .
That is, when the voltage of the power source E decreases, the time from when the switch S5 is turned on to when the transistor Tr5 is turned on is delayed depending on the state of the voltage of the power source E by the delay circuit having the above-described configuration. That is why it is done. RI,
l is the contact piece 11. From C side to N. The relays RL2a and RL3a are for switching the contact pieces 12 and 13 from the b side to the a side, respectively, and the RL2b and RL3b are for switching the contact pieces 12 and 13 from the a side to the b side, respectively. The motor M is controlled by the relay and the latching relay through the contact pieces 1, 12, 13.

Transistors Tr6, Tr7, resistor Rl3, contact piece 12
, 13 constitute a motor brake circuit. That is, when the switch S5 is turned on, the transistor Tr5 is turned on after a time determined by the delay circuit described above, and the latching relays RL2b and RL3b are energized, and the contact pieces 12 and 13 are both moved from the a side to the b side. However, at this time, the contact piece 11 is N. If it is not switched to the O side (
That is, if the release switches S1 to S3 are not turned on), the circuit of the motor M is cut off, and the base current of the transistor Tr6 flows through the resistor Rl3 due to the electromotive force of the motor M, and the base current of the transistor Tr6 flows through the resistor Rl3.
is turned on, so the transistor Tr7 is turned on, and both ends of the motor M are short-circuited, the brake is applied, and the motor M is stopped. Also, the contact piece 12 is on the a side, and the contact piece 13 is on the b side.
The transistor Tr
6. Regardless of the operating state of Tr7, both ends of the motor M are short-circuited, the brake is applied, and the motor M is stopped. The operation of the electric drive device configured as above will be explained.

First, before starting shooting, the number of sheets 25 shown in Fig. 2 is set.
Set. If the electric drive unit has finished rewinding the film that has been shot, the character [36] on the number plate 25 will be the counter index C. As will be explained in detail later.
Therefore, when taking a new photo using 36-exposure film, there is no need to reset the number plate 25, but when using film other than 36-exposure film,
For example, when taking a 20-shot film, push the counter set dial 48 against the spring 49, engage the convex part 48a of the counter set dial 48 with the concave part 25e of the number plate 25, and reverse the arrow direction. , and move the letter "20" on the number board 25 to the counter index C. Match l. Next, switch the selector dial 53 from "0FF" depending on the shooting mode, and select the letters "C (continuous shooting)" or [S (single shooting)] on the dial.
] as the index S. Try to match it. By switching the selector dial 53 from "0FF" to "C" or "S", the main switch SM for the camera body is turned on, and the power supply for the camera body (for the photometry circuit, electronic shutter control circuit) is turned on. etc.) is turned on.

Further, the main switch S2 of the electric drive device is also turned on together with the switch SM. First, selector dial 53
The operation when is set to [C (continuous shooting)] will be explained.

If the electric drive is in the phase that has completed winding, cam 1
The operating end 10a of the V-shaped lever 24 is stopped at the position shown in FIG. 23, and therefore, the release bar 20 is in a depressed state by the spring 21. Also, at this time, switch S5 is on and switch S6 is off. When the selector dial 53 is set to "C", switches SM, S2, and S8 are all on as shown in Table 1, and switches S7 and S'7 in the circuit of FIG.
are connected to the F and F' sides, respectively, and the contact pieces 12 and 13 are both connected to the b side. As stated in the explanation of FIG. 6, when the electric drive device and the camera (not shown) have completed winding and are ready for release operation, the release switches S or S3 in FIG. 6 are turned on. Like Transistor Tr
, relay RLl becomes conductive, and the contact piece 11 becomes N.
From C side to N. Switched to O side.

Accordingly, from power supply E to S2 → S, → diode D2 → S
F side of 7→Motor M-+S'F' side of 7→B side of 12→N. Current flows in the path from O side → SlO−+E,
Motor M begins to rotate in the direction of arrow A in Figure 1 (
Also, the contact piece 11 is N. From C side to N. By switching to the O side, one end of the resistor R4 is connected to the negative side of the power supply E, and therefore, as described in the explanation of FIG.
Since Tr1 and Tr2 have a self-holding function, even if release switches Sl and S3 are turned off before the release operation of the electric drive device is completed, relay RLl continues to be energized. is connected to the N-0 side. ). At this time, since the first sun gear 8 is prevented from rotating by a film empty feed prevention mechanism (not shown) on the camera body side, the second sun gear 9 rotates in the opposite direction to the arrow. Begin to. As a result, the pin 61 on the cam 10 pushes the arm 24b of the V-shaped lever 24, causing the lever 24 to rotate in the direction of the arrow. The rotation of the letter-shaped lever 24 in the direction of the arrow is caused by the engagement lever 2 via the pin 74.
3, the engagement lever 23 rotates in the direction of arrow H against the spring 22, and the sliding plate 1 is rotated by the protrusion 23a.
5. Release the lock. Therefore, the sliding plate 15 moves in the direction of arrow C under the action of the spring 16, and the first interlocking lever 1
8 in the direction of the arrow H and the second interlocking lever 19 in the direction of the arrow, the release bar 20 is pushed up, and a release member (not shown) on the camera body side is actuated to release the shutter. Perform the release. Further, the engagement lever 23 rotates in the direction of the arrow
3a, the counter feed member 29 shown in FIG. 2 is rotated against the spring 30 in the direction opposite to the arrow ``nu'' to a position where the amount of rotation of the engagement lever 23 is maximum. As a result, the feed claw 32 moves the number plate 25 by one frame of the film in the direction opposite to the arrow 27 against the spring 27 via its claw portion 32a. On the other hand, as the engagement lever 23 rotates in the direction of the arrow H, the switch S5 is turned off, and the switch S6 is turned on for a moment.

As a result, the latching relay RL2a shown in FIG. 6 is energized and the contact piece 12 is switched from the b side to the a side. At this time, the contact piece 13 is connected to the b side, so both ends of the motor M are short-circuited, and the motor M is braked and immediately stops. The stopping position of the cam 10 at this time is shown in FIG. Tr2 removes the self-holding action and cuts off the energization to relay RL1, so that contact piece 1 is switched to the N.C. side). As the shutter operation on the camera body (not shown) progresses and the shutter closes, a signal generating member (not shown) at the end of the shutter operation is activated and switch S4 in FIG. 6 is turned on.

As a result, the relat- ing relay RL3a is energized and the contact piece 13 is switched from the b side to the a side. Therefore,
From power supply E to S2 → S, → D2 → F side of S7 → motor M
1S'If) F' side → a side of 12 → a side of 13 → S8 →
Current flows through the path SlO→E, and motor M begins to rotate in the direction of arrow A in FIG. The rotation of the motor M is carried out via gear trains 2, 3, 4, and 6 as a gear system 5 as a rotating system.
At this time, the first and second sun gears 8,
In the state of 9, there is a certain amount of load on the first sun gear 8f for operating the winding mechanism on the camera body side (not shown), but there is no load on the second sun gear 9. Therefore, since the planetary gear 7 revolves around both sun gears 8 and 9 in the direction of the arrow, the first sun gear 8 does not rotate and the second The sun gear 9 is at the position where the working end 10a of the cam 10 is locked by the rollers 64 (
(When the electric drive device is in the phase in which it has completed its release operation, the regulating lever 14 is rotated in the direction of arrow 2, and the regulating lever 14 is rotated to the position shown in FIG. A roller 64 rotatably supported by a fixed pin 63 is located in the running path of the working end 10a of the cam 10.

). When the cam 10 is locked by the rollers 64,
Since the rotation of the second sun gear 9 is restricted, the first sun gear 8 is now rotated in the direction of the arrow, and is therefore connected to the camera body (not shown) via the winding connection member 11. The winding shaft on the side is driven, and winding operations such as shutter charge and film winding are started. As the winding operation of the electric drive device progresses, the movement of the winding mechanism on the side of the camera body (not shown) is blocked by a locking member in the mechanism, and when the winding operation on the side of the camera body ends, the camera body (not shown) moves. The winding shaft in the winding mechanism on the main body side is prevented from rotating, and therefore the rotation of the first sun gear 8 is also prevented. Here, both the first and second sun gears 8 and 9 are prevented from rotating, but at this time, the force preventing the rotation of the second sun gear 9 is caused by the spring of the sliding plate 15. 16, and therefore, the second sun gear 9 is forced to act on the active end 10a of the cam 10 by the reaction force at the time when the rotation of the first sun gear 8 is stopped. Push away and start rotating in the opposite direction of the arrow mouth.
As the roller 64 is pushed away by the working end 10a of the cam 10, the regulating lever 14 rotates in the direction opposite to arrow 2, and the pin 66 engaged with the U-shaped elongated hole 14b of the lever 14 is rotated. The sliding plate 15 is moved in the opposite direction of the arrow C through the sliding plate 15, and the protruding part 23a of the engagement lever 23 is engaged with the protruding part 15d of the sliding plate 15, thereby locking the sliding plate 15. . Due to this displacement of the sliding plate 15, the first interlocking lever 18
is released from the lock by pin 68 and moves in the opposite direction of arrow H.
Accordingly, the second interlocking lever 19 can be rotated in the opposite direction to the arrow, and the release rod 20 is pushed up by the spring 21 and ready for release operation. Also, at this time, the switch S5 is turned on due to the slight rotational displacement of the engagement lever 23 in the direction opposite to the direction indicated by the arrow. Switch S5
When R9 is turned on, as described in the explanation of FIG.
RlO, variable resistor R, capacitor C5, oscillation element PU
After a time determined by a delay circuit consisting of a voltage regulator diode ZD2 and a delay circuit according to the voltage state of the power source E, the transistor Tr5 is momentarily turned on by a pulse output from the cathode of the oscillation element PUT, and the latching relay is turned on. - RL2b and RL3b are energized and the contact pieces 12,1
3 are both switched from the a side to the b side. At this time, if the release switches S1 to S3 are turned on, the contact piece 11 moves to the N. It is connected to the O side, therefore, the power supply E
From S2 → S9 → D2 → F side of S7 → Motor M-+S
'7 F Asahi 1 → 12 b side → 11 N. O side → SlO−
) A current flows through the path E, and the motor M begins to rotate in the direction of arrow A in FIG. 1, so that the release operation continues. Follow me! Turn on switch S8, and
If the release switches S1 to S3 are kept pressed, the same cycle as described above is repeated to perform continuous shooting.
When the switches Sl and S3 are turned off, the contact piece 11 is turned off. From the O side to the N. When the winding operation is completed and the switch S5 is turned on, the contact pieces 12 and 1 are switched to the C side.
3 are both switched from the a side to the b side, the motor M
circuit will be cut off. As a result, as described in the explanation of FIG. 6, the transistor Tr7 becomes conductive via the transistor Tr6, and both ends of the motor M are short-circuited, and the motor M is braked and stopped. The stopping position of the cam 10 at this time is shown in FIG. 5a. Therefore,
When the release switches S1 to S3 are turned on again, the release operation is immediately started. Release switch S1
Or, if you leave S3 on until the end, the number board 25 will show that the letter "O" is the counter index C. When the motor moves to a position corresponding to I, the automatic stop switch SlO is turned off as described above, so that the electric power to the motor M is cut off, and the electric drive device stops its function.

Next, the operation when the selector dial 53 is set to "S (single shot)" will be explained.

When the selector dial 53 is set to "S", switches SM and S2 are both on and S8 is off, as shown in Table 1. When the release switch S1 to S3 is turned on for the electric drive device and camera (not shown) that have completed winding and are ready for release operation, the release operation is performed through the same process as in the case of continuous shooting. At the same time, the counter is incremented and the switch S6 is turned on, whereby the contact piece 12 is switched from the b side to the a side via the latching UL/RL2a (at this time, the contact piece 13 is connected to the b side). ). As a result, the motor M stops and the connection of the resistor R4 to the power source E is cut off, so that the transistors Trl and Tr2 release their self-holding action (the stopping position of the cam 10 at this time is shown in FIG. 5b). ). Therefore, if both switches Sl and S3 are turned off at this time, the contact piece 11 will be in the N. Switches from O side to N-C side. Next, when the shirt flap (not shown) on the camera body side is closed, the latching release RL3a is operated as described above, and the contact piece 13 is switched from the b side to the a side. Therefore, from power supply E to S2 → S, → F side of S7 → motor M-+
SI7 V side → 12 a side → 13 a side → 11 N. C
A current flows through the path from side to E, and motor M begins to rotate in the direction of arrow A in FIG. 1, and the winding operation is started in the same manner as in the case of continuous shooting. When the winding operation is completed, switch S5 is turned on and the power is turned on as in the case of continuous shooting.
After a lapse of time depending on the state of the voltage, the contact pieces 12 and 13 are both switched from the a side to the b side by the action of the latching relays RL2b and RL3b. At this time, the contact piece 11 is N
．． It is connected to the C side, and therefore the circuit of the motor M is cut off. As a result, as described in the explanation of FIG. 6, the transistor Tr7 becomes conductive via the transistor Tr6, and since both ends of the motor M are short-circuited, the motor M is braked and stopped. Accordingly, the cam 10 also comes to stop at the release waiting position (the position shown in FIG. 5a). When the release switches S1 to S3 are turned on again, a single picture is taken by following the same operation process as described above. Here, it is necessary that the cam 10 is always accurately stopped at the release waiting position (the position shown in FIG. The amount of rotation is expressed as follows.

That is, in FIG. 1, when the cam 10 pushes away the roller 64 by its working end 10a, the second sun gear 9 becomes rotatable in the direction opposite to the arrow. At this time, the first sun gear 8 has its shaft 62 and the winding coupling member 1.
Since the winding shaft on the camera body side (not shown) tries to return to the winding waiting position after winding is completed, a restoring force is acting through the gear 1, so that the second sun gear 9 is released from its restraint. Together with the first sun gear 8, the film is rotated by the winding angle (120 degrees) in the direction opposite to the direction indicated by the arrow by the restoring force of the winding shaft on the camera body (not shown). Therefore, when the motor M stops after the cam 10 pushes away the roller 64, the release waiting position (
The amount of rotation of the cam 10 until it is stopped at the position shown in FIG. 5a is expressed by equation (1). That is, the cam 10 is always accurately positioned at the release waiting position (Fig. 5a).
In order to stop at the position shown by (4), it is sufficient to keep the angle given by equation (4) constant.

It is clear that the previous term in equation (4) is kept constant. On the other hand, the rotational speed of the motor M changes depending on the voltage of the power source E, but in the present invention, the cam 10 pushes the roller 64 away, so that the rotation speed of the switch S5 is changed.
As mentioned above, the time from when the motor M is turned on until the brake is actually applied to the motor M is determined by the resistors R, , RlO, and RlO in FIG.
Since the delay circuit consisting of the variable resistor, the capacitor C5, and the oscillation element PUTl and the constant voltage diode ZD2 is used to determine the voltage according to the voltage state of the power supply E, the latter term can also be kept constant, and therefore, It becomes possible to always accurately stop the cam 10 at the release waiting position (the position shown in FIG. 5a).

Next, the operation of electric film rewinding will be explained.

After taking a predetermined number of photos, press pin 86 in Figure 2.
is pushed in against the elastic force of the lock spring 52 to release the arm 44b of the Y-shaped lever 44 from the pin 85, allowing the rewind lever 81 to rotate in the direction of the arrow y. . In this state, the rewinding lever 81 is rotated in the direction of the arrow y against the spring 42, and the second rewinding shaft 41 As shown in the figure, the cam surface 44e of the cam-shaped arm 44b of the substantially Y-shaped lever 44 moves the communication lever 45 against the spring 47 in the opposite direction to the direction of the arrow. Rotate it in the direction of. As the communication lever 45 rotates in the direction opposite to the arrow W, the locking lever 34 is rotated via the roller 90 in the opposite direction to the arrow O against the spring 36, and therefore, The locking by the locking pawl 34a of the locking lever 34 of the sheet counting board 25 and the locking by the feed pawl 32 are released, and the sheet counting board 25 has its protrusion 25b contacting the pin 28 due to the action of the spring 27. The contact position (the letter "36" on the number board 25 is the counter index C.I.
) to a position corresponding to
The counter will now be set. Rewind lever 8
When 1 is further rotated in the direction of the arrow y, the locking lever 3
4 pushes up the pin 54 upward in FIG. 2 through the shaft 91 of the collar 92, operates the sprocket release button on the camera body (not shown), and releases the sprocket mechanism on the camera body (not shown). Become. When the pin 54 is pushed up, that is, the sprocket mechanism on the camera body side (not shown) is completely released, the roller 89 comes to pass the top dead center of the cam surface 44e of the approximately Y-shaped lever 44, and therefore the rewind lever 81 can be further rotated in the direction of the arrow y. When the rewind lever 81 is further rotated in the direction of the arrow Y, approximately Y
Fixed pins 82 and 83 of the shape lever 44 are connected to the switch S7,
S'7 is switched from the F and V sides to the R and R' sides, respectively. This causes the current to flow from power source E to S2→S in Figure 6.
9→k side of S'7→motor M→R side of S7→power supply E, and motor M rotates in the reverse direction (rotates in the opposite direction to arrow A in FIG. 1). When the motor M reverses, the gear system 5 as a rotating system does not rotate due to the action of the one-way clutch 56 and the anti-reverse spring 58 shown in FIG. When the rewinding lever 81 is further rotated in the direction of the arrow y, the rewinding shaft 41 is pushed up, so that the claw portion 50b of the rewinding engaging member 50 engages with a film cartridge (not shown) and the clutch of the cylinder 80. The hole 80a comes to engage with the fixed pin 78 on the outer peripheral surface of the protruding cylinder 40a of the worm wheel 40, so that the rotation of the motor M is caused by the gear train 2a, 37, 38, 39, 40, pin 78.
The signal is transmitted to a film cartridge (not shown) via the cylinder 80, the rewinding shaft 41, and the rewinding engaging member 50, and the film is rewound. After rewinding the film is completed, when the rewind lever 81 is released (release the hand holding the rewind lever 81), the rewind shaft 41 is pushed down by the action of the spring 42, and the rewind engaging member 50 is disengaged from a film cartridge (not shown), and the generally Y-shaped lever 44 is rotated in the direction opposite to the arrow Y and automatically returns to the position shown in FIG. As a result, the switches S7 and S''7 are switched from the R and k sides to the F and IlV sides, respectively, and on the other hand, the communication lever 45 is actuated by the spring 47, and the locking lever 34 is moved in the direction of the arrow W. The locking pawl 34a of the locking lever 34 and the pawl portion 32a of the feed pawl 32 rotate in the direction of arrow O under the action of a spring 36.
comes to engage with the ratchet wheel 25a of the number plate 25, and the rewinding operation is completed. FIG. 7 shows a wiring diagram of an electric circuit when other accessories are attached to the electric drive device MD according to the present invention attached to the camera CM.

In the camera CM, A is a circuit such as the camera control circuit and photometry circuit, j is the power supply for the circuit A, and SM' is the main switch when using the camera CM without installing the electric drive device MD. It is. As explained in FIG. 6, S4 is a switch that is linked to the shirt shutter (not shown) in the camera CM, and t'1, t'2, t'3, and t'4 are power supply driving devices M.
These terminals are connected to terminals Tl, t2, t3, and t4 of D, respectively. In the electric drive device MD, the functions of the elements indicated by the same symbols as the circuit components shown in FIG. 6 and their connection methods are completely the same as in the case of FIG. 6.

T5, t6, and t7 are terminals for connecting to terminals t''5, t''6, and t'7 of the film chamber unit m, respectively;
T8, t9, tlO, and tll are connected to terminals t''8, t''9, and t''1 of the release unit G, which has the function of checking the voltage of the power supply E, via the connecting cord unit CC.
These are terminals for connecting to 0 and t''11, respectively. When the film chamber unit FC is attached to the electric drive mounting MD, the switch S in the electric drive device MD is turned off, and therefore the winding operation is disabled. is carried out by the motor M in the electric drive device MD, and winding of the film is carried out by the motor M! in the film chamber unit FC.

Sll is a switch for detecting the presence or absence of film;
Reference numeral 2 denotes a switch which is turned on via a magnet MF when the opening/closing lid of the film magazine in the film chamber unit FC is opened. Power supply E depending on release unit G
When checking the voltage, the main switch S2 of the electric drive device MD is turned off, and the switch Sl3 in the release unit G is turned on.

As a result, the circuit of the release unit G is energized, and if the voltage of the power source E is equal to or higher than the voltage level defined by the voltage regulator diode ZD3, the transistor Tr8 is turned on, thereby making the transistor Tr9 conductive.
Lamp L will now be lit, but if the voltage of power supply E is below the voltage level specified by voltage regulator diode ZD3, lamp L will not be lit. It is checked whether the voltage is sufficient to drive the electric drive device MD once. RC beam mode switch unit, TA is a timer unit, TB is a self-timer unit, and TC is a short timer unit.The output signals of these units are sent from the jack J to the electric drive unit MD via the workpiece tension unit EC.
is input as an external signal.

As described above, in the electric drive device according to the present invention,
Since the cam 10 as a rotating member is stopped only when the motor M is electrically braked, it is not necessary to lock the rotating member in the release operation waiting position as in conventional devices. No components are required, and a delay time circuit that can change the control start timing according to the voltage state of the power source E is provided in the circuit of the motor M, and the braking start timing of the motor M is determined by the delay time circuit. Because it was made to control, cam 10
The stop position in the release operation waiting state can be kept constant regardless of the voltage state of the power source E.

That is, in FIG. 5a, when the voltage of the power source E is V1, for example, when the cam 10 reaches the position indicated by I, the motor M starts braking and brakes between θ1, as shown by . If the setting is made to stop at the position, when the voltage of the power source E drops to V (V<V), the penetrating force of the motor M will be smaller than when the voltage is VI, so the cam 10 will move. If you start braking when you reach the position shown and brake between θ, the cam 10 will stop at the position shown. (However, at this time, θ1-θ2 is a function of V1-V2. It is necessary to set it so that there is a relationship.) Therefore, the cam 10 always waits for the release operation at the position indicated by , so the fixed pin 61 of the cam 10 immediately engages with the arm 24b of the shaped lever 24 at the time of release. Therefore, it is possible to significantly reduce the time delay between actuation of the release button and actual exposure of the film. In the embodiment shown in the drawings, an electric drive device is provided as an accessory to the camera body. However, it is within the spirit of the present invention to incorporate the camera into the device or to modify the interlocking structure. It falls within range 2.

[Brief explanation of drawings]

1 to 4 are main part configuration diagrams of the electric drive device according to the present invention, FIG. 5a is a partial view showing the stop position of the cam 10 in FIG. 5b is a partial view showing the stop position of the cam 10 when the release operation is completed, FIG. 5e is a partial view showing the stop position of the cam 10 when the electric drive device is performing the winding operation, and FIG. Figure 6 is an electric circuit diagram for the electric drive device shown in Figures 1 and 2, and Figure 7 is an electric circuit diagram when other accessories are attached to the electric drive device attached to the camera commercial. be. 1 to 8, 11 to 13, 56 to 59 and 62...
...... Components of hoisting power transmission mechanism, 9, 10
, 14 to 24, 60, 61, 63 to 76...
・Components of release mechanism, 25 to 36, 48, 49
and 77...Counter mechanism and components of the counter mechanism, 37 to 47, 50 to 52, 78 to 90...Components of the film rewinding mechanism, 5
3, 93, 94... Components of photographing mode selection means, 54, 55, 91, 92... Components of sprocket release means, SM, SM'', S1 to Sl3.
...Switch, Trl to Tr9...Transistor, R1 to Rl3...Resistance,
...Variable resistor, C1 to C5... Capacitor, Dl, D2, ZDl, ZD2, ZD3...
...Diode, RLl, RL2a, RL2b, RL3
a, RL3b...Relay 11A 12A 13゜゜゜1゜゜ contact piece, L-30-lamp, t1 to Tll2t
'1 to t'11 Ft"8 to t"11 t"'8 to t"'11... Connection terminal, M, M'-...
・Motor, J... Jack, PUT...
...Oscillation element, MF...Magnet.

Claims (1)

[Claims] 1. In an electric drive device equipped with a rotating member that starts operation from a shirt tar release operation waiting position and stops at the shirt tar release operation waiting position again, a motor braking circuit is included in the electric circuit of the electric motor connected to the rotating member. A constant voltage circuit, a delay circuit whose operation is started by a switch interlocked with the rotating member, a constant voltage from the constant voltage circuit and the output of the delay circuit are added, and the switching level is switched depending on the constant voltage. An electric drive device for a camera, wherein the switching circuit outputs a braking start signal to the braking circuit after a delay time of the delay circuit depending on a switching level.