JP2536381B2 - camera - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera in which a lens driving means, a film winding means and a film rewinding means are driven by a motor.

[0002]

2. Description of the Related Art In a camera that uses a motor to change the lens position and to wind and rewind the film, a motor for driving the lens and a motor for winding and rewinding the film are separately provided.

[0003]

As the number of motors increases, the size of the camera increases due to the increase in the installation space for the motors. It also causes a cost increase.

An object of the present invention is to provide a camera capable of driving a lens, winding a film and rewinding a film with a common motor.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a switching operation member capable of switching between shooting and non-shooting states, and a lens drive for driving a shooting lens between a projecting state and a retracted state. Means and winding means for winding the film,
It is applied to a camera equipped with a rewinding means for rewinding a film and a motor capable of forward and reverse rotation. Then, transmission means for selectively transmitting the rotation of the motor to any one of the lens driving means, the winding means and the rewinding means, the completion of photographing of all the frames of the film, or the fact that the film rewinding operation has been performed. First detecting means for detecting and outputting a first signal, second detecting means for detecting that the taking lens is in the storage position and outputting a second signal, and a switching operation member in a photographing ready state. When the switching operation member is in the photographing disabled state, the motor rewinds so that the rotation in one direction is transmitted to the winding means and the rotation in the other direction is transmitted to the lens driving means. The transmission means is controlled so that the rotation transmission from the motor to at least one of the winding means and the lens driving means is prohibited, and the first signal is output and the second signal is output. Is output, the transmission means is controlled so that the rotation of the motor is transmitted to the lens driving means to drive the photographing lens to the storage position, and the second signal is output after the first signal is output. And a control means for controlling the transmission means so that the rotation of the motor is transmitted to the rewinding means for rewinding, thereby solving the above problems.

[0006]

When the switching operation member is in a state capable of photographing, the rotation of the motor in one direction is transmitted to the winding means and the rotation in the other direction is transmitted to the lens driving means. When the switching operation member is in a photographing disabled state, the rotation of the motor is transmitted to the rewinding means and the rotation transmission from the motor to at least one of the winding means and the lens driving means is prohibited. Further, when the first signal is output and the second signal is not output, that is, when the photographing of all the frames of the film is completed or the film rewinding operation is performed in a state where the photographing lens is not in the retracted position, First, the photographing lens is driven to the storage position by the lens driving means. When the storage position is reached, a second signal is output, and in accordance with this, the film is rewound by the rewinding means.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a camera according to the present invention. In this embodiment, (A) lens cover is opened and closed (B) lens by a single motor provided in a film winding spool. Projection and storage of lens barrel (C) Projection and storage of light emitting part of flash device (D) Film winding (E) Charge of shutter mechanism etc. (F) Film rewinding is controlled.

Throughout this specification, the projection of the lens barrel means that the photographing lens provided in the lens barrel is moved together with the lens barrel to a separated position away from the image pickup surface. Storing means moving the photographing lens together with the lens barrel to a close position close to the image pickup surface, and does not necessarily mean a state in which the lens barrel cannot be completely stored in the camera body for photographing. For example, a shooting lens is composed of a master lens and a conversion lens, and in telephoto shooting, the master lens is moved to a separated position away from the image pickup surface, and then a conversion lens is arranged between the master lens and the image pickup surface for wide-angle shooting. It sometimes includes the concept of retracting the conversion lens from the optical axis of the lens and then moving the master lens to a close position close to the image pickup surface, and further includes the case where the lens barrel projects from the camera body in the housed state.

Throughout this specification, the projection of the light emitting portion of the flash device means that the light emitting portion is moved to a position away from the optical axis of the photographing lens, that is, a distant position. It means moving to a position close to the axis, that is, a near position, and does not necessarily mean that the flash unit cannot be used by storing the light emitting unit in the camera body. For example, in the case of performing flash photography on the wide-angle side as in a bifocal camera, this is a concept including the case where the light emitting unit is made to emit light closer to the optical axis of the photographing lens, as compared with the case of performing flash photography on the telephoto side.

In FIGS. 1 and 2, a lens barrel having a taking lens provided on a substrate 1 fixed to a camera body (not shown) (shown by a two-dot chain line in FIGS. 5A and 5B). The opening 1a larger than the outer diameter of 2) is opened, and two slots 1b are formed around the opening 1a. Rods 3a and 3b are inserted into the elongated hole 1b, and lens covers 4a and 4b rotatable around fulcrums A1 and A2 are held at one end of each rod. Here, the lens covers 4a and 4b function as a protective cover that covers the front surface of the taking lens. The other end of the rod is connected to a drive ring 5 described later.
A flash device 6 is connected to the drive ring 5 via a flash device drive system described later. Here, the covers 4a and 4b are opened and closed by the rotation of the drive ring 5 about the optical axis, and the flash device drive system is driven to project and store the flash device block 6c.

Further, rods 7a and 7b are erected on the substrate 1, and the rod 7a is provided with a lens barrel 2, a shutter mechanism (not shown), a focus adjusting mechanism (not shown) and the like. 8, the rod 7b is fitted in a U-shaped groove provided in the block, and thereby the block 8 is held slidably. Therefore, the lens barrel block 8 is connected to the rods 7a, 7 by the lens drive system described later.
By moving back and forth on b along the optical axis, the taking lens can be brought into and out of contact with the film surface as an imaging surface.

Next, each drive system described above will be described in detail. Here, as shown in FIGS. 1 and 3, the cover drive system and the lens drive system are a common cam member 11 which is rotationally driven by a motor 10 provided in the film spool 9.
Since the power transmission mechanism from the motor 10 to the cam member 11 is common, the transmission mechanism will be referred to as a cam drive system and will be described first.

(I) Cam drive system The pinion gear 12 mounted on the output shaft of the motor 10 is meshed with the reduction gear 13, and the reduction gear 13 is arranged so as to sequentially transmit rotation. It is connected to the sun gear 17 via 16. A planet gear 18 is rotatably supported by an arm 17a attached to the sun gear 17, and the planet gear 18 meshes with the reduction gear 19 when the motor rotates in the reverse direction. The reduction gear 19 is connected to the sun gear 21 via the reduction gear 20. The sun gear 21 is provided with a planetary gear 22 via an arm 21a and is connected to the gear 23 at the time of reverse rotation of the motor except during film rewinding described later. The gear 23 is the gear 2 provided on the shaft of the cam member 11.
4, the cam member 11 is rotationally driven. The gear 23 is also meshed with a brush gear 43 described later. The cam member 11 includes a surface cam 25 as a cover controlling cam means formed on the uppermost peripheral surface, a groove cam 26 as a lens controlling cam means formed on the uppermost upper surface, and a central gear. 24 and a cutout cam 27 at the lowermost portion, and is rotatably supported on the camera body about a fulcrum A5. The surface cam 25 is connected to the cover drive system, and the groove cam 26 is connected to the lens drive system. The cam member 11 will be described later.

(II) Cover drive system As shown in FIGS. 1 and 2, the cover drive system includes a shaft portion 2.
8a has a lever 28 pivotally supported on the substrate 1, and one end of the lever 28 is provided with a rod 28b extending parallel to the lens cover holding rods 3a and 3b.
The tip of the rod 28b can be engaged with the surface cam 25 (see FIG. 3). Further, a rod 28c extending to the opposite side of the rod 28b is provided at the other end of the lever 28,
The rod 28c is inserted into the elongated hole 5a of the drive ring 5. Then, the lever 28 is moved by the spring 29 to the shaft portion 2
It is always biased clockwise around 8a. The drive ring 5 is further provided with two long holes 5b and 5c, and the lens covers 4a and 4b are provided in the respective long holes.
The rods 3a and 3b respectively attached to are inserted. The drive ring 5 supported in this manner is normally urged counterclockwise by the spring 30.
5 is rotatable about the optical axis in the clockwise direction and the counterclockwise direction according to the engagement state between the rod 5 and the rod 28b. The clockwise rotation of the drive ring 5 opens the covers 4a and 4b to rotate the counterclockwise direction. The covers 4a and 4b are configured to be closed by movement.

(III) Lens Drive System As shown in FIGS. 1 and 3, the lens drive system has a lever 31 attached to the camera body so as to be rotatable around a fulcrum A3, and one end of the lever 31 is provided. An upright pin 31 a is loosely fitted in the groove cam 26. The lever 31 has an elongated hole 31b, and a pin 8a erected on the bottom surface of the lens barrel block 8 is inserted into the elongated hole 31b.
A locking pin 31c is provided on the other end of the lever 31, and the toggle spring 3 is provided between the lever 31 and a hooking portion 32 provided on the camera body.
8 are provided. The lever 31 swings around the fulcrum A3 as the groove cam 26 rotates, the lever 31 rotates counterclockwise to project the lens barrel block 8, and the lever 31 rotates clockwise to rotate the lens. The lens barrel block 8 is configured to be housed. In other words, the lens barrel block 8 is configured to be movable between a separated position away from the film surface and an adjacent position close to the film surface.

(IV) Flash Device Drive System As shown in FIGS. 1 and 2, the flash device drive system has a lever 33 rotatably attached to the camera body about a fulcrum A4. The fork 33a formed on one side has a pin 5 that is erected from the drive ring 5.
d is engaged. The gear 33b formed on the other side of the lever 33 is meshed with a gear 34 axially supported by the camera body, and the gear 34 is meshed with a rack 35 supported by the camera body so as to be vertically movable. The light emitting portion of the flash device 6 is provided inside the flash device block 6c, a slide plate 6a is erected on the bottom surface of the block 6c, and an arm 6b projecting from the slide plate 6a is provided from the rack 35. The arm 6b extends between the two protruding portions 35a and 35b.
A compression spring 36 is interposed between the spring 36 and the protrusion 35a, so that the arm 6b is pressed and sandwiched between the spring 36 and the protrusion 35a. Then, when the rack 35 rises, the flash device block 6c rises via the spring 36, and when the rack 35 descends, the flash device block 6c descends while the protrusion 35a pushes the arm 6b downward. Is configured. In this embodiment, the light emitting section is designed not to emit light when the flash device is stored. The sliding plate 6a
Is always urged downward by a tension spring 37 that is sufficiently weaker than the compression spring 36.

Next, the cam member 11 will be described. FIG.
As shown in FIG. 5, the surface cam 25 is formed along the peripheral edge of the uppermost part of the cam member, and is an inclined surface 25a which is a cover opening cam surface.
And a flat surface 25b connected to it and a slope 25c which is a cam surface for closing the cover and has a slope opposite to that of the sloped surface 25a, which is continuous with the flat surface 25b. Further, the tip of the rod 28b is located above the flat surface 25b by a distance Δh. Therefore, when the surface cam 25 rotates in the direction of the arrow, the rod 28b
Moves upward while contacting the inclined surface 25a and descends along the inclined surface 25c (due to the spring force of the spring 29), thereby controlling the opening and closing of the lens covers 4a and 4b via the drive ring 5.

As shown in FIGS. 5A and 5B, the groove cam 26 is a substantially elliptical groove having a center point eccentric from the rotation center A5 of the cam member 11, and the rotation center of the cam member 11. A groove portion 26a having a constant curvature with a radius r centered on A5
When the groove cam 26 rotates in the clockwise direction in the figure, its curvature gradually decreases and the pin 31a contacts the outer inner peripheral surface. The curvature gradually increases and pin 3
1a has a groove portion 26c which is a lens retraction cam surface that abuts the inner peripheral surface of the inner side, and in the state of FIG. 5A, holds the lens barrel block 8 at the lens storage position, and from there the arrow mark When the lens barrel block 8 is rotated in the direction to the state of FIG. 5B, the lens barrel block 8 is held at the lens protruding position.

The above-mentioned drive system includes the lens position selection lever 4
It is driven in the first mode and the second mode in response to the operation of 0. Hereinafter, that point will be described in detail. As shown in FIGS. 1 and 3, the lens position selection lever 40 is slidably attached to the camera body, and is constantly urged rightward in the drawings by a spring 41. The lever 40 has a tip extending to the camera body 39 and provided with a knob 40d.
By operating the knob 40d in the direction of the arrow in the figure, the position of the lens position selection lever 40 can be switched to the lens extension position corresponding to the first mode. To switch from this lens feed-out position to the lens feed-in position corresponding to the second mode, the lever 40 may be manually operated in the reverse direction of the arrow. However, as will be described later, the end of shooting of all films is detected. When the operation of housing the lens barrel is completed, the mode is automatically switched to the second mode, that is, the lens retracting position.

Further, in relation to the lens position selection lever 40, a click lever 45 and a depression lever 46 are coaxially supported by the camera body. The depression lever 46 is constantly urged in the counterclockwise direction by the spring 48, and it acts on the click lever 45 through the engaging portion 46c to urge the click lever 45 in the counterclockwise direction. On the other hand, the spring retaining pin 45a of both levers 45 and 46
A spring 47 is hooked on and 46a, whereby the click lever 45 is urged clockwise and the depression lever 46 is urged counterclockwise. Since the clockwise urging force applied to the click lever 45 by the spring 47 is stronger than the counterclockwise urging force of the spring 48, the claw portion 45b of the click lever 45 has the lens position selecting lever 4a.
The lens position selection lever 40.
Is operated to the left in the figure, the claw portion 45b is engaged with the recess 40c of the side wall of the lens position selection lever 40 to hold the lens position selection lever 40 at the lens extension position corresponding to the first mode. Is configured as follows.

On the other hand, the claw portion 4 at the tip of the depression lever 46
6b is pressed against the peripheral surface of the notch cam 27 of the cam member 11, and when the notch cam 27 rotates to the lens projecting position, it falls into the notch 27a, whereby the locking portion 46.
The click lever 45 is driven counterclockwise via c, and the claw portion 45b is disengaged from the concave portion 40c of the lens position selection lever 40, so that the lens position selection lever 40 corresponds to the second mode by the spring 41. It is configured to return to the lens retracted position.

Next, in this embodiment, the film is automatically wound by one frame in response to the release operation. The winding drive system will be described below. (V) Film winding drive system The film winding drive system has a motor forward rotation signal generation unit 104 (see FIG. 7) that operates in response to the operation of a release button (not shown), and the motor forward rotation system from there. Motor 1 by signal
0 is normally rotated, and the pinion gear 12 provided on the output shaft of the motor 10 is connected to the planetary gear 18 through the same system path as the above-mentioned cam drive system. Since the motor 10 rotates in the normal direction when winding the film, the arm 1 of the sun gear 17
The planetary gear 18 is meshed with the gear 50 by swinging 7a clockwise. The gear 50 is connected to the spool gear 52 at the lower end of the spool 9 via the gear 51.

The shutter mechanism and the like are charged in preparation for the next photographing in response to the film winding, and the charging mechanism will be described below. (VI) Charging Mechanism As shown in FIGS. 1 and 2, an arm 54a is attached to a sun gear 54 that is coaxially fixed to a sprocket 53 that is arranged so as to engage with the perforation of the film. A planetary gear 55, which is rotatable with respect to the arm 54a, is attached to the tip end in a state of meshing with the sun gear 54. A charge gear 56 is provided so as to be capable of meshing with the planet gear 55. A sector gear 57 is provided above the coaxial gear 56, and a cam switch 58 is provided below the coaxial gear 56. The sector gear 57 meshes with a rack portion 59a of a charge member 59 slidably provided on the camera body, and slides to the right in the figure as the sector gear 57 rotates. The charging member 59 is constantly urged to the left by a spring 60. The charging member 59 has an arm 59b that is bent and extends downward, and is configured so that the traveling plate 61 slidably provided on the lens barrel block 8 and the arm 59b are engaged with each other. By driving the traveling plate 61, the shutter mechanism and the automatic focus adjusting mechanism provided in the lens barrel block 8 are charged to prepare for the next release.

In this embodiment, the gear 56 is rotated even when the film is not loaded, and the switch S, which will be described later, is operated.
The following mechanism is provided in order to obtain the motor stop signal from 6. The gear 50 (see FIG. 3) has a rod 50a.
The sun gear 62 is fixed via the arm gear 62, and the planet gear 63 is meshed with the sun gear 62 via the arm 62a. The clockwise rotation of the sun gear 62 causes the arm 62a to swing clockwise, and the planetary gear 63 meshes with the gear 54. The number of teeth of each gear is determined so that the number of rotations of the planetary gear 63 by the motor 10 is smaller than the number of rotations by the sprocket 53 by the film transfer.

Further, the camera of this embodiment has a film rewinding drive system which is operated manually by operating the rewinding lever 65 or in response to the film being completely wound up. Driven. The rewinding drive system will be described below. (VII) Rewinding Drive System As shown in FIGS. 1 and 3, the rewinding drive system has a common drive from the above-described cam drive system from the pinion gear 12 provided on the output shaft of the motor 10 to the planetary gear 22. Have a system. The planetary gear 22 is meshed with the gear 66 in association with the operation of the rewinding lever 65 described later. The gear 66 is provided with a fork 67 that engages with the film cartridge.

The rewinding lever 65 is slidably provided on the camera body, and is constantly urged to the left in the figure by a spring 49. The switch S is placed on the movement path of the rewind lever 65.
5 are provided. Further, a magnet 80 is provided which is excited according to the result of the logical product of the rewinding signal from the switch S5 and the signal from the switch S3 which detects a lens position described later, and an armature attracted to the magnet 80 at one end. 81a is provided, and a transmission system path switching lever 81 having an arm 81b that engages with the leg 22a of the planetary gear 22 is provided at the other end of the camera body so as to be rotatable about a fulcrum A6. The lever 81 is always urged clockwise around a fulcrum A6 by a spring (not shown).
As shown in (a), the switching lever 81 and the leg portion 22a of the planetary gear 22 are separated from each other, and the planetary gear 22 is meshed with the gear 23 by the reverse rotation of the motor 10. In the rewinding mode, as shown in FIG. ), The magnet 80 is excited and the switching lever 81 rotates counterclockwise to press the planet gear leg 22a, so that the planet gear 22 rewinds the gear 66.
It is designed to be meshed with.

A spring 68 is attached to the film rewinding lever 65.
A locking lever 69, which is always urged clockwise by, is swingably provided, and when the lever 65 is operated to the rewinding position, it is attached to the camera body as shown by imaginary lines in FIGS. The hook 70a of the locking lever 69 is locked to the pin 70a of the slidably provided reset lever 70, whereby the rewinding lever 65 is locked at that position, that is, at the rewinding position. . The reset lever 70 is constantly urged in the direction of the arrow by a spring 71, but its movement is suppressed by a stopper 72 provided on a camera back cover (not shown).

FIG. 7 is a block diagram of the motor control system in this embodiment. In this embodiment, the forward and reverse rotations of the motor 10 are used as follows to control each drive system. Motor forward rotation ...
Film winding (charge of shutter mechanism, etc.) Motor reverse rotation: film rewinding, lens cover opening / closing, lens barrel block feeding / feeding, flash device raising / lowering

Referring to FIG. 7, a power source 102 is connected to a motor control unit 101 for controlling the rotation of the motor 10, and a motor reverse rotation signal generation unit 103, a motor forward rotation signal generation unit 104, and a motor stop signal generation are also provided. The unit 105 and the film end detection signal generation unit 106 are connected to each other.

The rewinding signal from the switch S5 which is opened and closed by the reverse rewinding lever 65 is connected to the AND gate 108 via the OR gate 107, and when the photographing of all the frames of the film is completed, the end detection signal generating section. The termination detection signal output from 106 is also input to the AND gate 108 via the OR gate 107. Further, the signal from the switch S3 which is closed when the lens barrel is housed is input to the AND gate 108, and the output of the AND gate 108 is input to the magnet control unit 109, which then controls the control unit 109. Is also supplied with a signal from a switch S7 which is opened when the film is completely rewound. The output of the magnet control circuit 109 is the magnet 80.
Demagnetization and excitation of are controlled.

Next, each part of the motor control system will be described. The motor reverse signal generator 103 is a switch S1 for detecting the position of the lens position selection lever 40 as a switching means.
And S2, switches S3 and S4 for detecting the position of the lens barrel block 8, and switch S5 for detecting the position of the rewind lever 65.

A. Switches S1, S2 Referring to FIGS. 1 and 3, the lever 40 includes an arm 40a.
And the brush 40b provided on the arm 40a slides on the pattern formed on the printed board 42. The lens retracted position biased by the spring 41 corresponds to the storage position of the lens barrel block 8, and the lens retracted position when the lever 40 is operated to the left in the figure against the spring 41 is the protrusion of the lens barrel block 8. Corresponds to position. As shown in FIG. 8, three conductor patterns 42a are formed on the printed circuit board 42.
(Common pattern), 42b and 42c are formed, and a brush 40b indicated by a chain double-dashed line is configured to slide on the common pattern, and the conductor pattern 42a is formed at the lens retraction position P1.
The switch S1 formed by the switches 42b and 42b is opened, the switch S2 formed by the conductor patterns 42a and 42c is closed, and the switch S1 is closed but the switch S2 is opened at the lens feeding position P2.

B. Switches S3, S4 The lens barrel block 8 is moved from the retracted position to the projected position in response to the lens position selection lever 40 being operated from the lens retracted position to the lens retracted position. The switches S3 and S4 for electrically detecting the position of are constituted by a brush gear 43 having a brush 43a and a printed circuit board 44 facing the brush gear 43a, as shown in FIGS. This gear 43 is made to rotate once when the cam member 11 makes one rotation.
The brush 43a shown in FIGS. 1 and 3 is attached to the upper surface of the printed circuit board 44, and the brush 43a shown in FIG.
Conductive patterns 44a to 44c shown in FIG.
The switch S4 is composed of a and 44b. The pattern 44a is grounded.

FIG. 9 shows the switch S in the lens storage position.
3 and S4, in this case, the conductor pattern 44a
The switch S4 composed of the conductor patterns 44a and 44b is opened, and the switch S4 composed of the conductor patterns 44a and 44c is opened.
3 is closed. When the cam member 11 rotates by 180 degrees and the lens barrel block 8 projects from the camera body to the lens projecting position, the switch S4 is closed and the switch S3 is opened.

C. Switch S5 As described above, the switch S5 is provided in the sliding area of the lever 65.
5, the contact piece 70 comes into contact with the contact piece 71 when the lever 65 is operated rightward in the drawing for the rewinding operation, and the switch S5 is closed to reverse the motor 10. Has been done. The motor stop signal generator 105 has a switch S6 that closes when one film of film is wound up and a switch S7 that opens when the film is completely rewound.

D. Switch S6 Referring to FIGS. 1 and 2, a switch contact piece 72 is always in contact with a switch cam 58 coaxial with the charge gear 56, and the switch contact piece 72 is separated from the switch contact piece 73, and thus the switch S6. Is open. When only one frame of film is wound up, the protrusion of the switch cam 58 presses the switch contact piece 72, the switch contact piece 72 contacts the switch contact piece 73, and the switch S6 is closed, whereby the motor 10 is stopped. It has become so.

E. Switch S7 Referring to FIGS. 1 and 2, a switch S7 for detecting the end of film rewinding is provided along the film transfer path, and when the film is completely rewound, the switch S7 is opened to feed the motor 10. The power is cut off. That is, the switch contact piece 74 is constantly biased toward the film surface, and the switch contact piece 74 and the switch contact piece 75 are kept in contact with each other while the detection pin 76 provided on the contact piece 74 is in contact with the film. When the switch S7 is closed by contact, the film is rewound and the detection pin 76 is released from the film and projects rearward from the film transfer path, the switch contact pieces 74 and 75 are separated from each other and the switch S7 is opened. Is configured. Motor forward rotation signal generator 1
Reference numeral 04 denotes a normal rotation signal output in response to the operation of the release button, and the end detection signal generation unit 106 detects it when the filming of all the frames of the film is completed and stops the motor 10 to rotate the reverse rotation signal. Is output.

The operation of the retractable camera according to this embodiment having the above-mentioned structure will be described below. (I) Opening the cover, projecting the lens, and raising the flash device When the lens position selection lever 40 for switching the lens retracted position to the lens retracted position is manually operated to the left in the figure against the spring 41, Claw 4 of click lever 45
5b engages with the recess 40c of the lever 40, which holds the lever 40 in its position and allows the brush 40
b slides on the pattern substrate 42, the switch S1 is closed, and the switch S2 is opened. Now, since the photographing lens is in the retracted position and the lens position detection switch S3 is in the closed state, the motor reverse signal is output to the motor control circuit 101 through the switches S1 and S3 in FIG. 7, and the motor 10 starts reverse rotation. .

When the motor 10 rotates in the reverse direction, its rotation is transmitted through the pinion gear 12 and the reduction gear trains 14 to 16 to the sun gear 1.
7 is transmitted. Since the sun gear 17 is rotated counterclockwise, the arm 17a swings counterclockwise and the planet gear 18 meshes with the gear 19. The rotation of the gear 19 is the
Is transmitted to the sun gear 21 via the arm 21a and swings in the counterclockwise direction, so that the planetary gear 22 meshes with the gear 23. As a result, the cam member 11 rotates clockwise and the gear 43 also rotates clockwise.

When the cam member 11 rotates clockwise, the rod 28b constituting the cover drive system is displaced upward by the inclined surface 25a of the surface cam 25, so that the lever 28 rotates counterclockwise against the spring 29. Move. According to the movement of the lever 28, the drive ring 5 rotates clockwise against the spring 30, and the lens covers 4a and 4b are opened via the rods 3a and 3b. At this time, since the lever 33 of the flash device drive system connected to the drive ring 5 rotates counterclockwise, the gear 34 rotates clockwise, the rack 35 rises, and the flash device block 6c moves through the spring 36. To rise. At this time, even if the rise of the flash device block 6c is blocked, the transmission force of the rack 35 is absorbed by the spring 36, so that the flash device drive mechanism is not damaged at all.

When the cam member 11 rotates further, the rod 28
Since b rides on the upper surface 25d of the surface cam 25, the lever 2
The rotation of the drive ring 5 is stopped, and the covers 4a and 4b are completely opened. At this time, in the grooved cam 26, the inner peripheral surface on the outer side of the grooved portion 26b reaches the immediate vicinity of the pin 31a, and the cam member 11
When is continuously rotated, its inner peripheral surface pushes the pin 31a, so that the lever 31 starts to rotate counterclockwise against the toggle spring 38. In association with the movement of the lever 31, the lens barrel block 8 is guided by the rods 7a and 7b to move forward. When the lever 31 further rotates counterclockwise and the toggle spring 38 exceeds its dead center, the lens barrel block 8 is biased forward by the toggle spring 38, so that the groove 2
The lens barrel block 8 further advances while the pin 31a slides along the inner peripheral surface of the inside of 6b. Groove cam is 180
When rotated once (see FIG. 5B), the projection 8b of the lens barrel block 8 contacts the substrate 1. At this time, the brush 43a has rotated 180 degrees from the state of FIG. 9, the switch S3 is opened and the switch S4 is closed, whereby the motor reverse rotation signal is deenergized and the motor 10 is stopped. Therefore, the rotation of the cam member 11 and the brush gear 43 also stops. In this state, the lens barrel block 8, in other words, the photographing lens is in the projecting position and is biased forward by the toggle spring 38.

(II) When filming is performed by operating the film winding release button, a normal rotation signal is output from the motor normal rotation signal generator 104 shown in FIG. 7 and the motor 10 is rotated in the normal direction. The rotation of the motor 10 is performed by the sun gear 17 via the pinion gear 12 and the reduction gear trains 13 to 16.
At this time, the sun gear 17 rotates clockwise, so that the arm 17a swings clockwise. Therefore, the planet gear 18 meshes with the gear 50, and the rotation of the motor 10 is further transmitted to the spool gear 52 via the gear 51, whereby the film is wound.

As the film is transferred, the sprocket 53
When is rotated clockwise, the arm 54a provided on the gear 54 integrated with the sprocket 53 swings clockwise and the arm 5
The planet gear 55 pivotally supported by 4a meshes with the charge gear 56. As a result, the sector gear 57 rotates and the charge member 59 is displaced rightward in the figure against the spring 60 to drive the traveling plate 61 provided on the lens barrel block 8, thereby charging the shutter mechanism and the like. Is performed. When the sector gear 57 further rotates and its notch 57a comes into contact with the rack portion 59a, the charge member 59 is returned to its original position by the spring 60. In parallel with this movement, the cam switch 58 rotates integrally with the charge gear 56, but when one film of film is wound up, the projection of the cam switch 58 presses the contact piece 72 to bring it into contact with the contact piece 73. , This allows
The switch S6 is closed and a motor stop signal is supplied to the motor control circuit 101 to stop the motor 10. Since the gear 62 that rotates integrally with the gear 50 rotates clockwise and its arm 62a swings clockwise, the planetary gear 63 pivotally supported by the arm 62a tries to mesh with the gear 54. The number of rotations of the sprocket 53 accompanying the transfer is
Since the rotation speed of the planetary gear 63 is set to be higher than that of the planetary gear 63 that is transmitted from the motor 10 and driven, the planetary gear 63 is repelled in the counterclockwise direction.

(III) Cover Closing, Lens Storage, Flash Device Storage In this embodiment, by manually returning the lens position selection lever 40 to the lens retracted position, the covers 4a and 4b are closed to close the lens. The flash device block 6c can be housed and stored, and when the photographing of all frames of the film is completed, it can be detected and these controls can be automatically performed.

Manual Operation When the lens position selection lever 40 held at the lens extension position is operated rightward in the figure against the click force of the click lever 45, in other words, from the lens extension position to the lens extension position. When switched, the brush 40b slides on the pattern substrate 42 to open the switch S1 and close the switch S2. At this time, the brush gear 43 is stopped at the position rotated by 180 degrees from the state of FIG. 9 due to the lens protruding operation, the switch S3 is opened, and the switch S4 is opened.
Is closed. Therefore, the reverse signal generator 103 (see FIG.
A reference signal) outputs a reverse rotation signal to the motor control unit 101, which causes the motor 10 to start reverse rotation as described above.

Similarly to the above, the reverse rotation of the motor 10 causes the cam member 11 to rotate clockwise. In the lens protruding state, as shown in FIG. 5B, the rod 28b rides on the upper surface 25d of the surface cam 25, and the pin 31a is located at the boundary between the groove portions 26b and 26c of the groove cam 26.
When the cam member 11 rotates clockwise from the state shown in FIG. 5B, the pin 31a is pressed against the inner peripheral surface inside the groove 26c, the lever 31 rotates clockwise, and the toggle spring 38 moves. On the contrary, the lens barrel block 8 is retracted from the protruding position toward the storage position. When the lens barrel block 8 retracts and the toggle spring 38 crosses its dead point,
The lens barrel block 8 retracts as the groove cam 26 rotates, and when the region of the groove 26a of the groove cam 26 reaches the position of the pin 31a, the curvature r of the groove cam 26 becomes constant and the lens barrel block 8 stops retracting. , That state is the lens storage position.

At this time, the starting point of the descending slope 25c is located in the immediate vicinity of the rod 28b, and when the cam member 11 further rotates, the spring force of the spring 29 causes the rod 28b to descend along the slope 25c. Beginning, this causes the lever 28 to rotate clockwise. Along with this, the drive ring 5 rotates counterclockwise to move the lever covers 4a and 4b.
Closes. The movement of the drive ring 5 is also transmitted to the above-mentioned flash device drive system, and the arm 35a of the rack 35 directly presses the leg portion 6a of the flash device block 6c to lower and store the flash device block 6c. When the cam member 11 further rotates and the rod 28b descends to the flat surface 25b of the surface cam 25, the brush 43a of the brush gear 43 becomes as shown in FIG. 9, and the switch S3 is closed and the switch S4 is opened. At this time, since the lens position selection switch S1 has already been opened, the motor reverse signal is deenergized,
This stops the reverse rotation of the motor 10.

Automatic command When the film is no longer pulled out after the filming of all the frames of the film is completed, the well-known film end detection signal generator 106
Detects it and supplies a motor stop reverse rotation signal to the motor control unit 101 to stop the motor 10 and reverse it. In response to the reverse rotation of the motor 10, the lens barrel block 8 moves to the lens storage position in the same manner as when the manual command is issued. When the lens barrel block 8 reaches its storage position, the drop lever 46 drops into the notch 27 a of the notch cam 27 of the cam member 11. The click lever 45 is rotated counterclockwise in conjunction with the movement, and the claw portion 45b of the click lever 45 is moved to the lens position selection lever 4.
The lens position selection lever 40 moves to the right in the drawing by the spring 41 and returns to the lens retracted position by being released from the recessed portion 40c of 0.

(IV) Film rewinding In this embodiment, the signal generator 10 detects that the film has been photographed and all the frames of the film are no longer wound.
When the film end detection signal is output from 6, the film is automatically rewound in response to the signal, and the film is also rewound by the manual operation of the rewinding lever 65. First, the operation of automatic rewinding will be described.

Automatic Rewinding When the film end detection signal is output while the lens barrel block 8 is held at the projecting position, the motor 10 starts reverse rotation by the signal. As a result, the lens barrel block 8 moves toward the storage position as described above, and when the lens barrel block 8 reaches the storage position, the switch S3 is closed and the switch S4 is opened. At this time, AND gate 108
The signal from the switch S3 and the film end detection signal via the OR gate 107 are supplied to the two input terminals of the AND gate 108.
A magnet excitation signal is supplied to 9, and the magnet 80 is excited thereby. At this time, since the armature 81a is attracted to the magnet 80, the switching lever 81 rotates counterclockwise and the planetary gear leg 2 as shown in FIG. 6 (b).
Press 2a. Therefore, the planetary gear 22 is rewound by the rewinding gear 6
Meshed with 6. On the other hand, since the film end detection signal is also supplied to the motor control unit 101, the motor 10 is rotated in the reverse direction. That is, the film end detection signal and the signal from the switch S3 function as a rewind signal.

Then, the planetary gear 18 is used as described above.
Is engaged with the gear 19 and the rotation of the motor 10 is caused by the sun gear 21.
Is transmitted to Here, the arm 21a of the sun gear 21 tries to swing counterclockwise, but as described above, the planet gear 2
Since the second leg 22a is regulated by the transmission path switching lever 81, the planet gear 22 meshes with the rewinding gear 66, whereby the rotation of the motor 10 is transmitted to the rewinding gear 66. Is rewound. The rewinding of the film causes the spool 9 to rotate, which causes the gear 50 to rotate, so that the gear 62 rotates counterclockwise via the rod 50a and the arm 62a swings counterclockwise. Therefore, the arm 62
The planetary gear 63 pivotally supported by a is separated from the sprocket gear 54. Further, since the sprocket 53 rotates counterclockwise by the film rewinding direction transfer, the arm 54a
Swings counterclockwise, which separates the planetary gear 55 from the charge gear 56, so that the charge member 59 does not slide during film rewinding, and the cam switch S6
Also, that is, the open state is maintained.

Here, when the film is completely rewound,
Since the film end detection pin 76 whose urging force is suppressed by the film is opened, the switch S7 is opened, whereby the motor stop signal is supplied to the motor control unit 101 and the motor 10 is stopped. On the other hand, switch S7
Is also supplied to the magnet control unit 109, which demagnetizes the magnet 80. Then, the switching lever 81 is rotated clockwise by a spring (not shown) to move to a position separated from the planetary gear leg portion 22a, that is, to a position where the movement of the planetary gear 22 meshing with the gear 23 is not restricted. When the photographing lens is housed, the film end detection signal is not output, so there is no automatic rewind function. When the lens barrel block 8 is stored by the above-described automatic film rewinding, the lens position selection lever 40 automatically returns to the lens retracted position in the same manner as described above.

Manual rewinding In this case, the film can be rewound regardless of whether the taking lens is protruding or housed. When the rewinding lever 65 is operated in a state where the taking lens is projected, first, the switch S5 is closed and the motor reverse rotation signal is output from the reverse rotation signal generation unit 103 to reverse the motor 10, whereby the same as described above. The lens barrel block 8 starts to be stored in the. When the lens barrel block 8 is completely housed, the switch S3 is closed, so that a closing signal is supplied to the AND gate 108. At this time, since the closing signal of the switch S5 is also input to the AND gate 108 via the OR gate 107, an excitation signal is output from the AND gate 108 to the magnet control unit 109, whereby the magnet 80 is excited. As a result, the armature 81a is attracted to the magnet 80 and the switching lever 81 displaces the planetary gear 22 as described above, so that the planetary gear 22 meshes with the rewinding gear 66, thereby rewinding.
Here, the signals from the switch S5 and the switch S3 function as a rewind signal. When the rewinding of the film is completed, the switch S7 is opened, so that the motor 10 is stopped and the magnet 80 is demagnetized as described above. In this case as well, the lens position selection lever 40 automatically returns to the lens retracted position as described above.

On the other hand, when the rewinding lever 65 is operated with the photographic lens housed, the switch S5 is first closed and the motor reverse signal is output from the reverse signal generator 103 to start the reverse rotation of the motor 10. . At this time, since the switch S3 is already closed, the AND gate 10
8 is supplied with the closing signal from the switch S3 and the closing signal from the switch S5, whereby the AND gate 10
An excitation signal is output from 8 and the magnet 80 is excited. Therefore, as described above, the planetary gear 22 meshes with the rewinding gear 66 to rewind the film. That is, in this case, the rewinding of the film is immediately started by operating the rewinding lever 65. When the film is completely rewound, the switch S7 is opened to stop the motor 10 and demagnetize the magnet 80, as in the case described above.
When the camera back cover (not shown) is opened to take out the rewound film, the pin 72 also moves accordingly.
The locking lever 70, which is restrained by 2, is moved in the arrow direction by the spring 71. This causes the locking lever 69 to move to the pin 7
Since it is released from 0a, the rewind lever 65 returns to the original position by the spring 69.

In the above embodiment, the lens position selection lever 40 is the switching operation member, the lever 31 is the lens driving means, the spool 9 is the winding means, the fork 67 is the rewinding means, and the gears 12-24, 50-. 52 and 66 are transmission means, switch SW5 and film end detection signal generator 106 are first detection means, switches SW3 and SW4 are second detection means, and the control system and magnet 80 shown in FIG. 7 are control means. Respectively. The shape of each cam of the cam member is not limited to the embodiment, and the rod 2
8b may be interlocked with the grooved cam, or the pin 31a may be interlocked with the surface cam.

[0056]

According to the present invention, the rotation of the motor is transmitted to the film winding means and the lens driving means in the first state where the photographing is possible, and the motor is transmitted to the film rewinding means in the second state. Since the rotation is transmitted and the rotation transmission to the lens driving means or the film winding means is prohibited, the rotation of the single motor capable of forward / reverse rotation can be appropriately distributed to any one of the three means. . Also,
When it is necessary to rewind the film, the shooting lens is driven to the retracted position before starting rewinding.
It is possible to prevent the inconvenience that the photographing lens is hit and damaged during rewinding.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing each part of a camera according to the present invention.

FIG. 2 is an enlarged view of the upper part of FIG.

FIG. 3 is an enlarged view of a lower portion of FIG.

FIG. 4 is a front view of the cam member shown in FIG.

5A and 5B are plan views of the cam member shown in FIG. 1, in which FIG. 5A is a plan view at a lens storage position, and FIG. 5B is a plan view at a lens projection position.

FIG. 6 is a plan view showing a rewinding drive system.

FIG. 7 is a block diagram showing a motor control system of a camera according to the present invention.

FIG. 8 is a plan view of a lens position selection switch.

FIG. 9 is a plan view of a lens position detection switch.

[Explanation of symbols]

 2 lens barrel 3a, 3b rod 4a, 4b lens cover 5 drive ring 6 flash device 7a, 7b rod 8 lens barrel block 8a pin 9 spool 10 motor 11 cam member 24 gear 25 surface cam 25a, 25c inclined surface of surface cam 25b Flat surface of cam 26 Groove cam 26a, 26b, 26c Groove of groove cam 28 Lever 31 Lever 31a Pin 33 Lever 34 Gear 35 Rack 36 Spring 40 Lens position selection lever 65 Rewind lever 66 Gear 67 Fork 80 Magnet 81 Transmission path Switching lever 101 Motor control unit 103 Motor reverse rotation signal generation unit 104 Motor forward rotation signal generation unit 105 Motor stop signal generation unit 106 Film end detection signal generation unit 109 Magnet control unit S1, S2, S3, S4, S5, S6, S7 switch

Claims (1)

(57) [Claims] 1. A switch between a photographable state and a photographable state.
Switching operation member that can be replaced and the shooting lens
In a camera equipped with a lens driving means for driving between a stored state, a winding means for winding a film, a rewinding means for rewinding a film, and a motor capable of forward and reverse rotation, the rotation of the motor is controlled by the lens. Transmission means for selectively transmitting to any one of the driving means, the winding means and the rewinding means, and the completion of photographing of all frames of the film, or the film
Detects that the rewind operation has been performed and outputs the first signal
And a first detecting means for detecting that the taking lens is in the storage position.
A second detecting means for outputting a second signal, said when the switch means is in the photographable state is transmitted to the winding means rotates in one direction of the motor rotation is the lens driving in the other direction As described above, when the switching operation member is in the photographing disabled state , the rotation of the motor is transmitted to the rewinding means and at least one of the winding means and the lens driving means is transmitted from the motor. It controls the transfer hand stage as inhibited rotation transmission to the said first signal
When the second signal is output and the second signal is not output, the imaging
Rotation of the motor to drive the shadow lens to the storage position
Is transmitted to the lens driving means.
And the second signal is output after the output of the first signal.
When output, the rotation of the motor will be
Controlling the transmission means so as to be transmitted to the rewinding means.
And a control means for controlling the camera.