JPH0434727B2 - - Google Patents

Description

Detailed Description of the Invention The present invention provides signals generated in synchronization with the movement of movable members such as mirrors and shutters that move during photographing, such as a camera shutter start signal, a mirror return signal to the observation position, and an X contact signal. The present invention relates to a generator.

Conventionally, this type of signal was generated directly from the moving member or its drive system. For example, the signal for returning the mirror to the observation position was generated directly from the drive member of the shutter closing member, which could impede the movement of the shutter closing member and cause uneven exposure, or cause the shutter closing member to fly in incorrectly. I felt relaxed. If the above-described defective insertion occurs, overexposure or the screen may remain open, and the film may be wasted due to light leakage. Also, due to the camera sequence, there are some cameras in which the double winding prevention mechanism is released when the shutter closing member jumps in, but in such cameras, if the shutter closing member jumps in, the double winding prevention mechanism is released. The prevention mechanism will not be released and subsequent photography will not be possible. Similarly, when winding with a motor drive, the motor switch is turned on when the shutter closing member jumps in.
Therefore, when the jump failure occurs, the switch is not turned on and winding by the motor drive becomes impossible. Furthermore, in the past, the shutter opening member was unlocked by the movement of the mirror itself, which may result in failure of the mirror to move out of the photographic optical path.

In order to solve these drawbacks, the present invention does not extract signals from the moving member or its drive system, but by providing a signal generating member that moves in synchronization with the movement of the moving member by an independent drive source. The object of the present invention is to obtain a signal generating device for a camera whose members can be moved without any hindrance.

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

FIG. 1 shows an embodiment in which the present invention is applied to a mirror, and shows a state in which charging of the mirror is completed.
The shaft 23 is a member that rotates counterclockwise by a charging operation. The charge member 21 is fixed to a shaft 23 and biased clockwise by a spring 22. The spring 22 has one end fixed to the charge member 21 and the other end fixed to the camera body. Axis 2
4 is fixed to the charge member 21, and its cylindrical portion is in contact with a drive member 25 for returning the mirror to the observation position. The drive member 25 is rotatably supported by a shaft 26, biased clockwise by springs 27 and 28, and locked by a locking lever 29. The spring 27 has one end fixed to the drive member 25 for returning the mirror to the observation position, and the other end fixed to the camera body. The spring 28 has one end fixed to the drive member 25 for returning the mirror to the observation position, and the other end fixed to the mirror drive member 32. The locking lever 29 is rotatably supported by a shaft 31 and biased clockwise by a spring 30. The spring 30 has one end fixed to the lever 29 and the other end fixed to the camera body. The mirror drive member 32 is rotatably supported by a shaft 33 and urged counterclockwise by a spring 28. The locking member 34 is
A mirror drive member 32 rotatably supported on a shaft 37
, and is biased counterclockwise by a spring 35. The shaft 37 has one end fixed to a magnetic lever 38. The shaft 36 has one end fixed to a magnetic lever 38, is urged upward by a spring 35, and is in contact with the lower portion 34a of the locking member 34. The spring 35 has one end fixed to the locking member 34 and the other end fixed to the shaft 36. The magnet lever 38 is rotatably supported by a shaft 39 and biased clockwise by a spring 40. The magnet 41 attracts and holds the magnet lever 38. The mirror 1 has shafts 2 and 4. The shaft 2 is rotatably supported by the camera body by a bearing 3, and the shaft 4 is fitted into a grooved cam 32a of a mirror drive member 32. The signal generating member 5 has a shaft 6 and a shaft 11, and is rotatably supported on the camera body by a bearing 7.
It is biased counterclockwise by a spring 12.
The spring 12 has one end fixed to the shaft 11 and the other end fixed to the camera body. The signal transmission member 8 is a shaft 9
It is rotatably supported by a spring 10 and biased counterclockwise by a spring 10. The spring 10 has one end fixed to the signal transmission member 8 and the other end fixed to the camera body. The locking member 13 locks the signal generating member 5, is rotatably supported by a shaft 16, and is biased clockwise by a spring 14. The spring 14 is fixed to the locking member 13 at one end and to the shaft 15 at the other end. The shaft 15 is fixed to a magnetic lever 18,
By the action of the spring 14, the bottom part 1 of the locking member 13
It is in contact with 3a. The magnet lever 18 has shafts 15 and 16, is rotatably supported by a shaft 20, is biased clockwise by a spring 17, and is held by attraction by a magnet 19. The spring 17 has one end fixed to the magnet lever 18 and the other end fixed to the camera body. Next, the operation of this device will be explained. The magnets 41, 1 are removed from an electric circuit (not shown) by the shutter release operation.
9 is energized. As a result, the magnet 41,
At the same time, the magnet lever 38, which does not lose its attraction force, is rotated clockwise under the action of the spring 40. At this time, the locking member 34 also rotates via the shafts 36 and 37, and the claw portion 32b of the mirror drive member 32 is unlocked. The unlocked mirror drive member 32 is rotated counterclockwise under the action of the spring 28.
A shaft 4 fixed to the mirror 1 is a mirror drive member 32
Since the mirror is fitted into the groove 32a, the mirror is rotated out of the photographing optical path. On the other hand, magnet lever 1
8 rotates clockwise under the action of a spring 17.
At this time, the locking member 13 also rotates via the shafts 15 and 16, and the signal generating member 5 is unlocked. The unlocked signal generating member 5 rotates counterclockwise under the action of the spring 12. Near the end of this rotation, the side surface 8a of the signal transmission member 8 is pushed against the spring 10, and the claw 8b releases the locking member that locks the leading blade of the shutter. This opens the screen and performs the well-known shutter operation. Then, the locking member 29 is rotated counterclockwise against the spring 30 in a well-known manner by a signal generated by the shutter device to return the mirror to the observation position. Then, the claw portion 29a of the locking member 29 releases the lock of the drive member 25 for returning the mirror to the observation position. The drive member 25 is then rotated clockwise by the action of the spring 27. At this time, the mirror drive member 32 moves its side surface 32c to the return drive member 2 to the observation position of the mirror.
Since the protrusion 25a of No. 5 is in contact with the protrusion 25a, it similarly rotates clockwise. Then, the shaft 4 fitted in the grooved cam 32a rotates in the opposite direction to the direction in which the mirror was retracted out of the photographing optical path, and the mirror returns to the observation position.
In the charging operation of this device, the magnet levers 18 and 38 are moved by the springs 17 and 40 in the first stage of charging.
The magnet 1 rotates against the
9, 41 and hold it by suction. At this time, the locking member 34
The claw 34b is located at a position where rotation of the claw 32b of the mirror drive member 32 is restricted. In the second stage of charging, the shaft 23 is rotated counterclockwise against the spring 22 by means not shown. The charge member 21 is the shaft 2
Since it is fixed at 3, it similarly rotates counterclockwise. At this time, the cam surface 21a of the charge member 21
pushes the shaft 11, the signal generating member 5 rotates clockwise against the spring 12, passes over the locking member 13, and is then locked by the locking member 13. On the other hand, since the shaft 24 provided on the charge member 21 is in contact with the drive member 25 for returning the mirror to the observation position,
After rotating this member 25 counterclockwise and riding over the claw portion 29a of the locking member 29, the member 25
is locked. At this time, the springs 28 and 27 are also charged at the same time, and the charging operation is completed.

The signal generating member 5 of this embodiment starts and stops at the same time as the mirror 1, and since the direction of movement is opposite to that of the mirror, it has the effect of reducing vibrations accompanying the movement and stopping of the mirror 1 and preventing camera shake. Furthermore, if the momentum of both is made equal, the effect becomes more pronounced. Further, in this case, if the mass of the signal generating member 5 is made larger than that of the mirror 1, the moving distance of the member 5 can be made smaller than that of the mirror 1, and a vibration damping effect can be obtained without increasing the size of the device. Further, the signal generating member 5 has the effect of blocking light leakage from below the mirror 1 located at the observation position. Furthermore, by attaching a mirror to the signal generating member 5, the mirror can guide the photographing light beam to the photometric element, or the photographing light beam that cannot be completely reflected by the mirror 1 alone can be guided to the finder system.

FIG. 2 shows an embodiment in which the present invention is applied to a shutter. This figure shows a state in which the shutter has been fully charged. The shaft 50 is a member that rotates counterclockwise by a charging operation. The charge member 51 is fixed to the shaft 50 and has cam surfaces 51a, 51b,
It has arms 51c and 51d, and is biased clockwise by a spring 52. One end of the spring 52 is fixed to the charge member 51, and the other end is fixed to the camera body. The shaft 53 is a signal generating member 54 that interlocks with the leading blade.
The cam surface 51a of the charge member 51 is fixed on the
It is possible to contact with. A signal generating member 54 interlocking with the leading blade is connected to a shaft 5 provided on a shutter board 55.
6, and is biased counterclockwise by a spring 57. The spring 57 has both ends fixed to a pin 58 provided on the shutter board 55 and a protrusion 54a of the signal generating member 54. The shaft 59 is fixed on the leading blade drive member 60,
It can come into contact with the arm 51c of the charge member 51.
The leading blade driving member 60 is rotatably supported on a shaft 61 fixed on the shutter board 55, and is supported by a spring 6.
2 in the counterclockwise direction. Spring 6
2 is a pin 63 provided on the leading blade driving member 60
One end is locked to the shaft 61, and the other end is fixed to the shaft 61. The blade drive pin 64 is provided on the leading blade driving member 60, and is fitted into a hole in the leading blade driving link on the lower side of the shutter board 55 through an arcuate groove 55a of the shutter board 55. The locking member 65 is rotatably supported on a shaft 66 implanted in the shutter base plate 55, and the leading blade drive member 60 is supported by the protrusion 65a.
The leading blade signal generating member 54 is locked by the protrusion 65b, and is biased clockwise by the spring 12. The spring 67 has one end fixed to the locking member 65,
The other end is a pin 6 planted on the shutter board 55.
It is fixed at 8. The shaft 69 is the rear blade drive member 7
Cam surface 51 of charge member 51 fixed on
b. The rear blade drive member 70 is rotatably supported on a shaft 71 fixed on the shutter base plate 55, and is biased counterclockwise by a spring 72. The spring 72 has one end locked to a pin 73 fixed on the drive member 70 and the other end to the shaft 7
It is fixed at 1. The rear blade drive pin 74 is fixed to the drive member 70 and fits into a hole in the rear blade drive link through an arcuate groove 55b provided in the shutter board 55. The shaft 75 is fixed on a signal generating member 76 that interlocks with the rear blade, and can come into contact with the arm 51d of the charge member 51. A signal generating member 76 that operates in conjunction with the rear blade is rotatably supported by a shaft 77 fixed to the shutter board 55, and is biased counterclockwise by a spring 78. The spring 78 has one end fixed to a pin 79 fixed on the shutter board 55, and the other end fixed to the signal generating member 76. The locking member 80 is connected to the rear blade drive member 70
A spring 82 is rotatably supported on a shaft 81 fixed to the shutter board 55.
is biased counterclockwise by. spring 82
has one end fixed to a shaft 83 fixed on the shutter board 55, and the other end fixed to a locking member 80. Next, the operation of this shutter device will be explained. When the shutter is released, the signal generating member (5 in Fig. 1) that works with the mirror moves the lever 8 to the spring 1.
0 and rotate counterclockwise. Then, the key part 8b of the lever 8 engages the arm part 65c of the locking member 65.
is pressed, the locking member 65 rotates counterclockwise against the spring 67, and the leading blade driving member 60 and the signal generating member 54 are unlocked at the same time. Leading blade drive member 6
0 rotates counterclockwise under the action of a spring 62, and a pin 64 fixed to the drive member 60 moves the leading blade group 100 shown in FIG. 3 upward to open the screen.
On the other hand, the signal generating member 54 is rotated counterclockwise by the action of the spring 57. After the leading blade fully opens the screen, the protrusion 54b of the signal generating member 54 pushes the movable piece 84a of the synchronization switch of the flash device, that is, the X contact switch 84, and contacts the fixed piece 84b, turning the switch 84 ON. Then, the buffer member 54c of the signal generating member 54 hits the pin 85 fixed to the shutter board 55, and its movement is stopped. Further, at the moment when the locking member 65 releases the locking of the drive member 60 and the signal generating member 54, the protrusion 65d of the locking member 65 pushes the movable piece 86a of the normally closed switch 86, cutting off contact with the fixed piece 86b. , a circuit not shown begins counting the exposure time. After a predetermined exposure time has elapsed, a current is applied to the magnet 87 from a circuit not shown. Then, the suction piece 8 fixed to one end of the locking member 80
The magnet 87 that was attracting 0c loses its attraction force, and the locking member 80 rotates counterclockwise under the action of the spring 82. By this counterclockwise rotation, the rear blade driving member 70 and the rear blade signal generating member 76 are unlocked. Unlatched rear blade drive member 70
The pin 74 rotates counterclockwise under the action of a spring 72 and is fixed on the rear blade drive member 70.
Move the rear blade group 101 shown in the figure to close the screen.

On the other hand, the trailing blade signal generating member 76, which is unlocked at the same time as the trailing blade driving member 70, rotates counterclockwise under the action of the spring 78. After the rear blade closes the screen, one end 76a of the signal generating member 76 pushes the end of the locking member 29 shown in FIG. 1 to return the mirror 1 to the observation position. Next, the protrusion 76b pushes the movable piece 88a of the switch 88, bringing it into contact with the fixed piece 88b, turning on the trailing curtain switch, and the motor (not shown) starts the winding operation. Then, the buffer member 76c of the signal generating member 76 stops moving as it hits the pin 89 fixed to the shutter board 55. In the shutter charging operation, at the beginning of charging, a lever (not shown) rotates the rear blade locking member 80 clockwise against the spring 82 to attract and lock the attraction piece 80c to the magnet 87. Next, the shaft 50 is rotated counterclockwise. Then, the charge member 51 also rotates counterclockwise against the spring 52. At this time, the cam surface 51a
pushes the shaft 53 that is in contact with this cam surface. Axis 5
3 is fixed on the leading blade signal generating member 54, the signal generating member 54 rotates around the shaft 56,
The protrusion 54d rotates clockwise against the spring 57.
As the mirror returns to the observation position, the mirror passes over the protrusion 65b of the locking member 65, which has returned to its original position, and is locked. Further, the shaft 59 in contact with the arm 51c is also pushed by the counterclockwise rotation of the charge member 51. Since the shaft 59 is fixed on the leading blade drive member 60, the drive member 60 rotates clockwise against the spring 62, and the claw portion 60a of the drive member climbs over the protrusion 65a of the locking member 65. be disrespected. The shaft 69 in contact with the cam surface 51b is pushed by the counterclockwise rotation of the charge member 51. axis 6
9 is fixed on the rear blade drive member 70, the drive member 70 rotates clockwise against the spring 72, and the claw portion 70a of the drive member 70 is returned to its original position by means not shown after the shutter runs. It gets over the protrusion 80a and is locked by the locking member 80 which has been returned to its original position. The shaft 75 in contact with the arm 51d is pushed by the counterclockwise rotation of the charge member 51. Since the shaft 75 is fixed on the trailing blade signal generating member 76, the signal generating member 76 rotates clockwise against the spring 78, and the protrusion 76d of the signal generating member 76 engages with the protrusion of the locking member 80. It is locked by climbing over the portion 80b. Note that the signal generating member 76 and the rear blade driving member 70 are connected to the protrusions 80b and 80a of the locking member 80.
The locking member 80 must be rotated counterclockwise when climbing over the suction piece 80.
c is attracted to the magnet 87, this counterclockwise rotation is realized by elastic deformation of the spring portion 80d of the locking member. After the operation is completed, the shaft 50
is released from restraint by a device not shown. Then, due to the action of the spring 52, the arm 51c rotates clockwise together with the charge member 51, and the arm 51c hits a pin 90 fixed to the camera body, stopping the movement.

The signal generating members 54 and 76 of this embodiment also start and stop at the same time as the shutter blades 100 and 101, and move in the opposite direction to these, so they have the effect of canceling out vibrations caused by the running and stopping of the shutter blades and preventing camera shake. .

As described above, according to the present invention, since the above-described signal generating member is provided, movable members such as shutters and mirrors can move smoothly without wasting energy for generating signals. This can prevent mirror malfunctions.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment in which the present invention is applied to a camera mirror, Fig. 2 is a perspective view of an embodiment in which the invention is applied to a shutter device, and Fig. 3 shows the substrate of the shutter device in Fig. 2. It is a figure which shows the state removed. [Explanation of symbols of main parts], 1...Mirror, 5,
54, 76... Signal generating member, 32... Mirror drive member, 12, 57, 78... Spring, 60... Lead blade drive member, 65, 80... Locking member, 70...
... Rear blade drive member, 100 ... Lead blade group, 101
...hind feather group.

Claims (1)

[Claims] 1. Driven by a drive source that is independent of the drive source of a moving member that moves during photographing, such as a camera shutter or mirror, which moves in synchronization with the moving member and generates a signal related to the movement of the moving member. A signal generating device for a camera, comprising a signal generating member that generates a signal.