JPH0675149B2 - camera - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera in which at least a part of a lens system can take two positions, a lens proximity position close to an image pickup surface and a lens separation position separated from the image pickup surface. Is.

(Background of the Invention) Conventionally, a so-called collapsible camera, which moves a shooting lens to a remote position away from an image pickup surface when the camera is used, and moves the shooting lens to a close position to the image pickup surface when the camera is not used, The shooting lens is composed of a master lens and a conversion lens, the first focal length is obtained only by the master lens, the master lens is moved along the optical axis in a direction away from the image pickup surface by a predetermined amount, and then behind the master lens. There is known a so-called bifocal camera in which a conversion lens is arranged to obtain a second focal length. Here, also in this bifocal camera, on the telephoto side, the master lens is moved to a remote position away from the imaging surface,
On the wide angle side, the master lens is moved to a close position close to the image pickup surface.

This type of camera has a switching means for selecting the position of the taking lens and a lens driving means, and switches the switching means to the lens retracting position to energize the lens driving means to drive at least a part of the lens system. The lens system is moved to the close position and switched to the lens feeding position to move at least a part of the lens system to the separated position.

By the way, in such a camera, since the lens barrel projects from the camera body when the taking lens is in the separated position, it is desirable to always place the lens barrel in the close position to protect the lens barrel when the camera is not used. . In particular, after the use of the camera, the consciousness is concentrated on the film rewinding, and it is easy to neglect to store the lens barrel. Therefore, there is a device that detects that the film is completely rewound and drives the lens barrel to be housed in response to the result, or stores the lens barrel in response to the operation of the rewind switch. Proposed.

However, in this proposed camera, although the lens barrel is actually stored, the switching means for selecting the position of the photographing lens is located at the position where the lens barrel is projected and the operator is confused. was there. It should be noted that the term "storing the lens barrel" as used herein is used not only to completely store the lens barrel in the camera body but also to include a case where only a part of the lens barrel is stored in the camera body.

(Object of the Invention) In order to solve such a problem, an object of the present invention is to switch when the photographing lens is moved to a close position close to the image pickup surface due to an operation other than the switching means, in conjunction with it. It is an object of the present invention to provide a lens shutter camera in which the means is automatically switched to the lens retracting position.

(Summary of the Invention) The present invention provides a switching unit that can be selectively switched between two positions, that is, a lens retracting position and a lens retracting position, and a lens system of all or a part of a photographing lens that is biased by the switching unit. Lens driving means movable to two positions, a lens proximity position close to the imaging surface and a lens separation position distant from the imaging surface;
Holding means for holding the switching means at the lens feeding position, and when the switching means is operated to the lens feeding position, the switching means is held at that position by the holding means, and a predetermined operation of the camera other than the switching means is performed. In response, the urging means for urging the lens driving means to move the photographic lens to the lens proximity position, and the urging of the lens driving means by the urging means drives the photographic lens toward the proximity position. And releasing means for releasing the holding of the switching means by the holding means to return the switching means to the lens retracted position.

(Embodiment) FIG. 1 shows an embodiment of a camera according to the present invention. In this embodiment, a single motor provided in a film winding spool is used to (A) open and close a lens cover (B). 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 term “projection of the lens barrel” means that the photographing lens provided in the lens barrel is moved together with the lens barrel to a remote position away from the imaging surface. It means moving the taking lens together with the lens barrel to a 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 to take an image. For example, a photographic 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 to obtain a wide-angle lens. This includes the concept of retracting the conversion lens from the optical axis of the lens at the time of shooting and 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 stored state. .

Throughout this specification, the projection of the flash unit light emitting unit means moving the light emitting unit to a position away from the optical axis of the photographing lens, that is, a distant position. This means moving to a position, 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 than in the case of performing flash photography on the telephoto side.

In FIG. 1, a substrate 1 fixed to a camera body (not shown) has a lens barrel (shown by a chain double-dashed line in FIGS. 3A and 3B) 2 on which a photographing lens is provided. An opening 1a larger than the diameter is formed, and two elongated holes 1b are formed around the opening 1a. Rods 3a and 3b are inserted into the long holes 1b, and fulcrums A1 and A2 are attached to one end of each rod.
Lens covers 4a and 4b which are rotatable around the respective are held. 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 drive ring 5 is a member that constitutes a cover drive system which will be described in detail later, and the rotation of the drive ring 5 around the optical axis opens and closes the covers 4a and 4b and drives the flash device drive system. The flash device block 6c is projected and stored.

Moreover, rods 7a and 7b are erected on the substrate 1, and the rods 7a and 7b are
Is fitted in a lens barrel block 8 provided with a lens barrel 2, a shutter mechanism (not shown), a focus adjustment mechanism (not shown), etc., and a rod 7b is fitted in a U-shaped groove provided in the block. As a result, the block 8 is held slidably. Therefore, the lens barrel block 8 can be moved back and forth on the rods 7a and 7b along the optical axis by the lens drive system described later, and the photographing lens can be brought into and out of contact with the film surface as the image pickup surface.

Next, each drive system described above will be described in detail. Here, the cover drive system and the lens drive system have a common cam member 11 that is rotationally driven by a motor 10 provided in the film spool 9, and the power transmission mechanism from the motor 10 to the cam member 11 is common. Therefore, 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 attached to the output shaft of the motor 10 meshes with the reduction gear 13, and the reduction gear 13 passes through reduction gear trains 14 to 16 arranged to sequentially transmit rotation. Sun Sun Gear
Connected to 17. A planetary gear 18 is pivotally supported on an arm 17a attached to the sun gear 17, so that the planetary gear 18 can be rotated when the motor reverses.
18 is configured to mesh with the reduction gear 19. Reduction gear
19 is connected to a sun gear 21 via a 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 meshes with a gear 24 provided on the shaft of the cam member 11 to drive the cam member 11 to rotate. 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 part, and is rotatably supported on the camera body about a fulcrum A5. Face cam 25
Is connected to the cover drive system, and the grooved cam 26 is connected to the lens drive system. The cam member 11 will be described later.

(II) Cover drive system The cover drive system has a lever 28 axially supported by the substrate 1 via a shaft portion 28a, and one end of the lever 28 is parallel to the lens cover holding rods 3a, 3b. An extending rod 28b is provided, and the tip of the rod 28b is engageable with the surface cam 25. A rod 28c extending on the opposite side of the rod 28b is provided at the other end of the lever 28.
Is inserted into the elongated hole 5a of the drive ring 5. And
The lever 28 is constantly urged by a spring 29 in the clockwise direction about the shaft portion 28a.

The drive ring 5 is further provided with two elongated holes 5b and 5c, and rods 3a and 3b attached to the lens covers 4a and 4b are inserted into the elongated holes, respectively. The drive ring 5 supported in this way always has a spring 30.
Is urged counterclockwise by the
It can be rotated clockwise and counterclockwise about the optical axis according to the state of engagement with b. The covers 4a and 4b are opened by the clockwise rotation of the drive ring 5, and the covers are rotated by the counterclockwise rotation. It is configured so that 4a and 4b are closed.

(III) Lens drive system The lens drive system is attached to the camera body so as to be rotatable around a fulcrum A3, and has a lever 31, and a pin 31a standing on one end of the lever 31 is loosely fitted in the groove cam 26. ing. 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 latch pin 31c is provided at the other end of the lever 31, and a toggle spring 38 is provided between the lever 31 and the latch portion 32 provided in the camera body.

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 distance position away from the film surface and a proximity position close to the film surface.

(IV) Flash device drive system The flash device drive system has a lever 33 attached to the camera body so as to be rotatable around a fulcrum A4, and a drive ring 5 is attached to a fork 33a formed on one side of the lever 33. The pin 5a standing upright is engaged. The gear 33b formed on the other side of the lever 33 includes a gear 3 pivotally supported by the camera body.
4 is meshed, and its 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, and a slide plate 6a is erected on the bottom surface of the block 6c.
The arm 6b protruding from the rack 3 extends between the two protruding portions 35a and 35b protruding from the rack 35, and the compression spring 36 is interposed between the arm 6b and the protruding portion 35b. Therefore, the arm 6b is connected to the spring 36 and the protrusion.
It means that it is pressed and held by 35a. Then, when the rack 35 rises, the flash device block is connected via the spring 36.
When the 6c moves up and the rack 35 moves down, the protrusion 35a moves toward the arm 6b.
The flash device block 6c is configured to move downward while pushing down. In this embodiment, the light emitting section is designed not to emit light when the flash device is stored. The sliding plate 6a is constantly urged downward by a tension spring 37 that is sufficiently weaker than the compression spring 36.

Next, the cam member 11 will be described.

As shown in FIG. 2, 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 cam surface for opening the cover.
And a flat surface 25b connected to it and an inclined surface 25a connected to it
Inclined surface which is a cam surface for closing the cover having a slope opposite to
25c and when the block 8 is in the storage position,
As shown by the solid line, the tip of the rod 28b is separated from the flat surface 25b by a distance Δ.
It is located at a distance h above. Therefore, when the surface cam 25 rotates in the direction of the arrow, the rod 28b is displaced upward while contacting the inclined surface 25a, and is lowered along the inclined surface 25c (due to the spring force of the spring 29). The lens covers 4a and 4b are controlled to be opened and closed via.

As shown in FIGS. 3A and 3B, 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 A5 of the cam member 11 is A groove 26a having a constant curvature with a radius r as the center and a lens feeding cam surface in which the curvature gradually decreases when the groove cam 26 rotates clockwise in the drawing and the pin 31a abuts on the outer peripheral surface. A certain groove portion 26b and a groove portion 26c which is a lens retraction cam surface whose curvature gradually increases when rotating similarly and the pin 31a abuts on the inner peripheral surface of the inside, are shown in FIG. In this state, the lens barrel block 8 is held at the lens storage position, and when the lens barrel block 8 is rotated in the direction of the arrow from there to reach the state shown in FIG. 3B, the lens barrel block 8 is held at the lens protruding position. .

The drive system described above is driven in the first mode and the second mode in response to the operation of the lens position selection lever 40. Hereinafter, that point will be described in detail.

The lens position selection lever 40 is slidably attached to the camera body and is always urged to the right in the figure by a spring 41. A knob 40d is provided at the tip of the lever 40 extending to the camera body 39, and the lens position selection lever 40 is moved to the first position by operating the knob 40d in the direction of the arrow in the figure.
It is possible to switch to the lens extension position corresponding to the mode. To switch from this lens extension position to the lens extension position corresponding to the second mode, the lever 40 may be manually operated in the reverse direction of the arrow, but as will be described later,
At the end of the operation of storing the lens barrel by detecting the end of shooting of all the films, the mode is automatically switched to the second mode, that is, the lens retraction 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 biased counterclockwise by a spring 48, which acts on the click lever 45 via the engaging portion 46c to bias the click lever 45 counterclockwise as well. On the other hand, a spring 47 is hooked on the spring hooking pins 45a and 46a of both levers 45 and 46, which causes the click lever 45 to move clockwise and the depression lever 46a.
Is biased counterclockwise. Since the clockwise biasing force applied to the click lever 45 by the spring 47 is stronger than the counterclockwise biasing force by the spring 48, the claw portion 45b of the click lever 45 is attached to the side wall 4 of the lens position selection lever 40.
0b and when the lens position selection lever 40 is operated to the left in the figure, the claw portion 45b engages with the recess 40c in the side wall of the lens position selection lever 40 to move the lens position selection lever 40 to the first position. It is configured to hold the lens at the lens extension position corresponding to the mode. The holding means is composed of these members.

On the other hand, the claw portion 46b at the tip of the depression lever 46 is the cam member 11
The notch cam 27 is pressed against the peripheral surface of the notch cam 27.
When it rotates to the lens protruding position, it falls into the notch 27a, which causes the click lever 45 to engage through the locking portion 46c.
Is driven counterclockwise, and its claw 45b is disengaged from the recess 40c of the lens position selection lever 40, whereby the lens position selection lever 40 is returned by the spring 41 to the lens retracted position corresponding to the second mode. Is configured to be. In this embodiment, these members constitute the releasing means.

Next, in this embodiment, the film is automatically wound by one frame in response to the release operation, and the winding drive system will be described below.

(V) Film winding drive system The film winding drive system has a motor forward rotation signal generator 104 (see FIG. 5) that operates in response to the operation of a release button (not shown). Motor 10 by rotation signal
Is normally rotated, and the pinion gear 12 provided on the output shaft of the motor 10 is connected to the planetary gear 17 through the same system path as the cam drive system described above. When the film is wound, the motor 10 rotates in the normal direction, so that the arm 17a of the sun gear 17 swings clockwise, and the planet gear 18 is meshed with the gear 50. Gear 50
Is connected to a spool gear 52 at the lower end of the spool 9 via a gear 51.

The shutter mechanism and the like are charged in preparation for the next shooting in response to the film winding, and the charging mechanism will be described below.

(VI) Charging mechanism An arm 54a is attached to a sun gear 54 that is coaxially fixed to a sprocket 53 that is arranged to engage with the perforation of the film, and the tip of the arm 54a rotates with respect to the arm 54a. A free planet gear 55 is mounted in mesh with the sun gear 54. A charge gear 56 is provided so as to be able to mesh with the planet gear 55, and a sector gear 57 is provided on the upper side and a cam switch 58 is provided on the lower side coaxially with the gear 56. The sector gear 57 meshes with the rack portion 59 of the charge member 59 slidably provided on the camera body,
As the sector gear 57 rotates, it slides to the right in the figure. The charging member 59 is constantly urged to the left by the spring 60. The charging member 59 has an arm 59b that extends downward by bending, and is configured such 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 adjustment mechanism provided in the lens barrel block 8 are charged to prepare for the next release.

In this embodiment, the following mechanism is provided in order to rotate the gear 56 and obtain the mode stop signal from the switch S6 described later even when the film is not loaded.

A sun gear 62 is fixed to the gear 50 via a rod 50a,
The planetary 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. Motor 10
The number of teeth of each gear is determined so that the rotation speed of the planetary gears 63 due to the rotation speed is smaller than the rotation speed of the sprocket 53 due to the film transfer.

The camera of this embodiment has a film rewinding drive system, which is driven by manually operating the rewinding lever 65 or in response to the film being completely wound up. . The rewinding drive system will be described below.

(VII) Rewinding Drive System The rewinding drive system has a drive system common to the above-mentioned cam drive system from the pinion gear 12 provided on the output shaft of the motor 10 to the planet gears 22. The planet gear 22 is meshed with the gear 66 in association with the operation of a rewinding lever 65 described later. The gear 66 is provided with a fork 67 that engages with the film cartridge.

The rewind lever 65 is slidably provided on the camera body,
The spring 49 constantly urges it to the left in the figure. A switch S5 is provided on the movement locus of the rewind lever 65. Further, a magnet 80 that 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 that detects the lens position described later is provided, and an armature that is attracted to the magnet 80 at one end.
The transmission system switching lever 81 is provided on the camera body so as to be rotatable about a fulcrum A6, and the transmission system switching lever 81 is provided with an arm 81b that is provided with 81a and the other end has an arm 81b that engages with the leg 22a of the planetary gear 22. The lever 81 is always urged clockwise around a fulcrum A6 by a spring (not shown). Except in the rewinding mode, as shown in FIG. 4 (a), the switching lever 81 and the leg of the planetary gear 22 are set. Department
22a, which is separated from the planetary gear 22a by the reverse rotation of the motor 10.
Meshes with the gear 23, and in the rewinding mode, as shown in FIG. 4 (b), the magnet 80 is excited and the switching lever 81 rotates counterclockwise to press the planet gear leg 22a. Therefore, the planetary gear 22 is meshed with the rewinding gear 66.

The film rewinding lever 65 is provided with a locking lever 69, which is constantly urged clockwise by a spring 68, so that the film rewinding lever 65 can swing, and when the lever 65 is operated to the rewinding position, it is imagined in FIG. As shown by the line, the hook 69a of the locking lever 69 is locked to the pin 70a of the reset lever 70 slidably provided on the camera body, whereby the rewinding lever 65 is in that position, that is, in the rewinding position. It is supposed to be locked. 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. 5 is a block diagram of the mode control system in this embodiment. In this embodiment, each drive system is controlled by using forward and reverse rotations of the motor 10 as follows.

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. A power supply 102 is connected to a motor control unit 101 that controls rotation, and a motor reverse rotation signal generation unit 103, a motor forward rotation signal generation unit 104, a motor stop signal generation unit 105, and a film end detection signal generation unit 106 are connected. To be done.

The rewind signal from the switch S5 which is opened and closed by the rewind lever 65 is connected to the AND gate 108 via the OR gate 107, and is output from the end detection signal generation unit 106 when the shooting of all the frames of the film is completed. The termination detection signal is also input to the AND gate 108 via the OR gate 107.
Furthermore, the signal from the switch S3 that is closed when the lens barrel is stored is input to the AND gate 108,
The output of the AND gate 108 is input to the magnet control unit 109, and this control 109 is also supplied with a signal from the switch S7 which is opened when the film is completely rewound. The output of the magnet control circuit 109 controls demagnetization and excitation of the magnet 80 supplied to the magnet 80.

Next, each part of the motor control system will be described.

The motor reverse signal generation unit 103 includes switches S1 and S2 for detecting the position of the lens position selection lever 40, and a switch S3 for detecting the position of the lens barrel block 8 as switching means.
Switch S5 that detects the position of S4 and rewind lever 65
Have.

Switches S1, S2 Referring to FIG. 1, the lever 40 is provided with an arm 40a,
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.
A conductor pattern 42a (common pattern), 42b and 42c of a book is formed, a brush 40b indicated by a chain double-dashed line is configured to slide on the conductor pattern 42a, and a switch including the conductor patterns 42a and 42b at the lens retraction position P1. S1 is opened, the switch S2 including 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.

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 extended position. Switch S3 that electrically detects the position of
1 and S4 are constituted by a brush gear 43 having a brush 43a and a printed circuit board 44 facing the brush gear 43, as shown in FIG. The gear 43 is meshed with the gear 23 so that it makes one revolution when the cam member 11 makes one revolution. The brush 43a shown in FIG. The conductor patterns 44a-44c shown are formed, and in the patterns 44a and 44c, the switch S3 is
The switch S4 is composed of a and 44b. Note that the pattern
44a is grounded.

FIG. 7 shows the states of the switches S3 and S4 in the lens retracted position, in which case the switch S4 composed of the conductor patterns 44a and 44b is opened and the conductor patterns 44a and 44c are opened.
The switch S3 composed of is closed. Cam member 11 is 18
When the lens barrel block 8 is rotated by 0 degree and protrudes from the camera body to the lens protruding position, the switch
S4 is closed and switch S3 is open.

Switch S5 As described above, the switch S5 is arranged in the sliding area of the lever 65, and the contact piece 70 contacts the contact piece 71 when the lever 65 is operated rightward in the drawing for the rewinding operation. Then, the switch S5 is closed and the motor 10 is rotated in the reverse direction.

The motor stop signal generator 105 has a switch S6 which is closed when one film of film is wound up and a switch S7 which is opened when the film is completely rewound.

Switch S6 Referring to FIG. 1, a switch cam 72 coaxial with the charge gear 56 is constantly in contact with a switch contact 72, and the switch contact 72 is separated from the switch contact 73.
S6 is open. When only one film 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.

Switch S7 Referring to FIG. 1, 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 energize the motor 10. It is supposed to be shut 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.

The motor normal rotation signal generation unit 104 outputs a normal rotation signal in response to the operation of the release button, and the end detection signal generation unit 106 detects it when all frames of the film have been photographed. A motor stop signal is output to the motor 10.

The operation of the retractable camera according to this embodiment having the above configuration 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, The claw portion 45b of the click lever 45 engages with the recess 40c of the lever 40, which holds the lever 40 at that position, and the brush 40b is attached to the pattern substrate 4
Sliding on 2, switch S1 is closed and 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. start.

When the motor 10 reversely rotates, the rotation is transmitted to the sun gear 17 via the pinion gear 12 and the reduction gear trains 14-16. Since the sun gear 17 is rotated counterclockwise, the arm 17a swings counterclockwise and the planet gear 18 meshes with the gear 19. Also gear
The rotation of 19 is transmitted to the sun gear 21 via the gear 20 and its arm
The planet gear 22 meshes with the gear 23 because 21a swings counterclockwise. 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 forming 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. The drive ring 5 rotates clockwise against the spring 30 according to the movement of the lever 28, 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 is further rotated, the rod 28b rides on the upper surface 25d of the surface cam 25, so that the rotation of the lever 28b is stopped, whereby the rotation of the drive ring 5 is also stopped, so that the covers 4a, 4b.
Is completely opened.

At this time, in the grooved cam 26, the inner peripheral surface outside the grooved portion 26b reaches the immediate vicinity of the pin 31a, and when the cam member 11 continues to rotate, the inner peripheral surface pushes the pin 31a, so that the lever 31 is a toggle spring. It begins to rotate counterclockwise against 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. lever
When 31 further rotates in the counterclockwise direction 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 lens barrel block 8 moves along the inner peripheral surface inside the groove 26b. The lens barrel block 8 further advances while the pin 31a slides. When the groove cam rotates 180 degrees (Fig. 3 (b))
The protrusion 8b of the lens barrel block 8 contacts the substrate 1 (see FIG. At this time, the brush 43a has rotated 180 degrees from the state of FIG. 7, the switch S3 is opened and the switch S4 is closed, whereby the motor reverse signal is deenergized and the motor is rotated.
10 stops. Therefore, the cam member 11 and the brush gear 43
Also stops rotating. 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 an image is taken by operating the film winding release button, the motor normal rotation signal is output from the motor normal rotation signal generator 104 shown in FIG. The rotation of the motor 10 is the pinion gear 1
2, transmitted to the sun gear 17 via the reduction gear trains 13 to 16. At this time, the sun gear 17 rotates clockwise, so that the arm 17 is rotated.
a swings clockwise. Therefore, the planet gear 18 is replaced by the gear 50.
The rotation of the motor 10 is further transmitted to the spool gear 52 via the gear 51, whereby the film is wound up.

When the sprocket 53 rotates clockwise as the film moves, the arm 54a provided on the gear 54 integrated with the sprocket 53 swings clockwise and the planet gear 55 pivotally supported by the arm 54a charges the charge gear. Mesh with 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 done. The sector gear 57 rotates further and its notch 57a
When the abutting contact with the rack portion 59a, the charging member 59 is returned to the 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 is a contact piece.
72 is pressed into contact with contact piece 73, which causes switch S6
Is closed, the motor stop signal is supplied to the motor control circuit 101, and the motor 10 is stopped.

Since the gear 62 that rotates together with the gear 50 rotates clockwise and its arm 62a swings clockwise, the planet gear 63 pivotally supported by the arm 62a tries to mesh with the gear 54. Since the rotation speed of the sprocket 53 accompanying the transfer is set to be higher than the rotation speed of the planetary gear 63 transmitted from the motor 10 side and driven, the planetary gear 63 is splashed counterclockwise.

(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 can be closed, the lens can be housed, the flash device block 6c can be housed, and when the shooting 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 to the right in the figure against the click force of the click lever 45, in other words, when the lens extension position is switched to the lens extension position, the brush is pressed. 40b is the pattern board 4
By sliding on 2, the switch S1 is opened and the switch S2 is closed. At this time, the brush gear is moved by the lens protruding operation.
43 is stopped at a position rotated 180 degrees from the state of FIG. 7, switch S3 is open, and switch S4 is closed. Therefore, a reverse rotation signal is output from the reverse rotation signal generator 103 (see FIG. 5) and sent to the motor control circuit 101, whereby the motor 10 starts 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. 3B, 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. 3 (b), the pin 31a is pressed against the inner peripheral surface inside the groove 26c, the lever 31 rotates clockwise, and the toggle spring 38 is rotated. Against this, the lens barrel block 8 is retracted from its protruding position toward the storage position. When the lens barrel block 8 retracts and the toggle spring 38 exceeds its dead center, the lens barrel block 8 retracts as the groove cam 26 rotates, and the area of the groove portion 26a of the groove cam 26 reaches the position of the pin 31a. Then, the curvature r of the groove cam 26 becomes constant and the backward movement of the lens barrel block 8 stops, and that state is the lens storage position.

At this time, the starting point of the slope 25c having a downward slope is located in the vicinity of the rod 28b, and when the cam member 11 further rotates, the spring 29
The spring force causes the rod 28b to start descending along its inclined surface 25c, which causes the lever 28 to rotate clockwise. Along with this, the drive ring 5 rotates counterclockwise and the lever covers 4a and 4b are closed. The movement of the drive ring 5 is also transmitted to the flash device drive system described above, and the arm 35a of the rack 35 is transmitted.
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. 7, 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 rotation signal is deenergized, whereby the reverse rotation of the motor 10 is stopped.

Automatic command When the film is no longer pulled out after shooting of all frames of the film is completed, the well-known film end detection signal generation unit 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 causes the notch cam 27 of the cam member 11 to move.
In the notch 27a. The click lever 45 rotates counterclockwise in conjunction with the movement, and the click lever 45 has a claw portion.
45b is disengaged from the recess 40c of the lens position selection lever 40, whereby the lens position selection lever 40 is moved to the right in the figure by the spring 41 and returned to the lens retracted position.

(IV) Film rewinding, in this embodiment, the signal generation unit 106 detects that all the frames of the film have been photographed and the film is no longer wound.
When the film end detection signal is output from the film, the film is automatically rewound in response to the signal, and the film is also rewound by manually operating 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,
When it reaches the storage position, switch S3 is closed
S4 is opened. At this time, the signal from the switch S3 and the OR gate 107 are connected to the two input terminals of the AND gate 108.
Since the film end detection signal is supplied via the, the AND gate 108 supplies a magnet excitation signal to the magnet control unit 109, whereby the magnet 80 is excited. At this time, since the armature 81a is attracted to the magnet 80, the switching lever 81 rotates counterclockwise and presses the planet gear leg 22a as shown in FIG. 4 (b). Therefore, the planetary gear 22 is meshed with the rewinding gear 66. 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, similarly to the above, the planet gear 18 meshes with the gear 19 and the rotation of the motor 10 is transmitted to the sun gear 21. Here, the arm 21a of the sun gear 21 tries to swing in the counterclockwise direction, but since the leg portion 22a of the planetary gear 22 is restricted by the transmission path switching lever 81 as described above, the planetary gear 22 is rewound. The rotation of the motor 10 is transmitted to the rewinding gear 66, and the film is rewound.

The rewinding of the film causes the spool 9 to rotate, which causes the gear 50 to rotate, causing the gear 62 to rotate counterclockwise via the rod 50a and the arm 62a to swing counterclockwise. Therefore, the planetary gear 63 pivotally supported by the arm 62a is replaced by the sprocket gear 5
Move away from 4. Further, since the sprocket 53 rotates counterclockwise due to the transfer of the film in the rewinding direction, 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 remains open, that is, opens. Stay in the state.

Here, when the film is completely rewound, the urging force of the film is suppressed by the film.
Is released, the switch S7 is opened, so that the motor stop signal is supplied to the motor control unit 101 and the motor 10
Stops.

On the other hand, the open signal of the 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 a position separated from the planetary gear leg 22a, that is,
The planetary gear 22 moves 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 housed by the above-described automatic film rewinding, the lens position selection lever 40 automatically returns to the lens retracting 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 stored.

When the rewinding lever 65 is operated in a state where the photographing 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. Lens barrel block 8
Begins to be stored. When the lens barrel block 8 is completely stored, the switch S3 is closed.
Is supplied with a closing signal. At this time, since the closing signal of the switch S5 is also input to the AND gate 108 via the OR gate 107, the magnet control unit 1 is operated from the AND gate 108.
An excitation signal is output to 09, which excites the magnet 80. 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 switches S5 and S3 function as rewinding signals. 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, with the shooting lens stored, the rewind lever
When the switch 65 is operated, first, the switch S5 is closed and a motor reverse rotation signal is output from the reverse rotation signal generation unit 103 to start the reverse rotation of the motor 10. At this time, since the switch S3 is already closed, the closing signal from the switch S3 and the closing signal from the switch S5 are supplied to the AND gate 108, which outputs the excitation signal from the AND gate 108. Magnet 80 is excited. Therefore, as described above, the planet 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, the motor 10 is stopped, and the magnet 80 is demagnetized, 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 due to the opening of the back cover of the camera. Therefore, the locking lever 70 held by the pin 72 moves in the direction of the arrow by the spring 71. As a result, the locking lever 69 is released from the pin 70a, so that the spring 69 returns the rewinding lever 65 to its original position.

In the above embodiment, when the lens position selection lever 40 is in the lens extension position, the position of the lever 40 is held by the click lever 45, and the predetermined lever of the camera is operated without manually operating the selection lever 40 to the lens extension position. When the lens barrel is automatically returned to the storage position (proximity position) in conjunction with the operation, the click lever 45 is driven in conjunction with the depression lever 46 that falls into the notch 27a in response to the return operation. Thus, the selection lever 40 is automatically switched to the lens retracted position, but the automatic return of the selection lever 40 to the lens retracted position is not limited to such a structure.

Further, the case of the so-called collapsible camera has been described above, but the present invention can be applied to the bifocal camera as described in the section of the background of the invention. In this case, the lens position selection lever
You can switch between the telephoto switching position (lens extension position) and the wide-angle switching position (lens extension position), and the taking lens (master lens) automatically moves from the telephoto side to the wide-angle side in response to the camera's predetermined operation. The lever switching position is automatically switched in response to the movement to.

Further, in the above-described embodiments, the cam member 11 using the motor 10 is used.
The lens cover is opened and closed, the lens cover is opened and closed, the lens is projected and stored, and the flash device and the flash device are stored and retracted. Each operation may be performed. In this case, the cover closing cam surface 25a and the cover opening cam surface 25c of the cam member 11 can be made common, and the lens feeding cam surface 26b and the lens feeding cam surface 26c can also be made common. It can be simplified. Further, the cam member may be linearly moved to perform each of the above operations.

Furthermore, the shape of each cam of the cam member is not limited to this embodiment, and the rod 28b may be interlocked with the groove cam or the pin 31a may be interlocked with the surface cam. Has a cam surface for opening, a cam surface for opening the cover, a cam surface for retracting the lens, and a cam surface for extending the lens, and the cam member is in the first mode (when the lens position selection lever 40 is operated to the lens extending position). When driven, the lens is extended after the lens cover is opened, and when driven in the second mode (when the lens position selection lever 40 is operated to the lens retracted position or during automatic rewinding), Any cam may be used as long as each cam surface is formed by a single cam member so that the lens cover is closed after the lens is housed. As described above, needless to say, four cam surfaces are not necessary when the cam member is normally or reversely rotated, and only two cam surfaces are required.

(Effect of the Invention) According to the present invention, when the switching means is switched to the lens feeding position, the feeding photographing lens is automatically fed in association with a predetermined operation of a camera other than the switching means. When the lens is retracted and returned to the lens near position, the switching means is automatically returned to the lens retracted position in response to it. Therefore, the operator is not confused at all.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing each part of a camera according to the present invention,
2 is a front view of the cam member shown in FIG. 1, FIGS. 3 (a) and 3 (b) are plan views of the cam member, FIG. 2 (a) shows a lens storage position, and FIG. Is a diagram showing a lens protruding position, FIGS. 4 (a) and 4 (b) are plan views showing a rewinding drive system, FIG. 5 is a block diagram showing a motor control system of a camera according to the present invention, and FIG. FIG. 7 is a plan view of the lens position selection switch, and FIG. 7 is a plan view of the lens position detection switch. 2: Lens barrel, 3a, 3b: Rod 4a, 4b: Lens cover (protective 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 25b: flat surface 26: groove cam 26a to 26c: groove 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 controller 103: Motor reverse signal generator 104: Motor forward signal Generator 105: Motor stop signal generator 106: Film end detection signal generator 109: Magnet controller S1 to S7: Switch

Claims (1)

[Claims] 1. A taking lens capable of taking at least two positions, at least a part of which has a lens approaching position close to an image pickup surface and a lens separating position away from the image pickup surface, and the taking lens, said lens approaching position and said lens It is possible to selectively switch between a lens driving unit that moves between the separated positions and a lens retracting position and a lens retracting position. At the lens retracting position, the lens driving unit is urged to perform the photographing. A camera having a switching means for moving the lens to the close position and for urging the lens driving means to move the photographing lens to the separated position at the lens extension position, wherein the switching means includes the lens extension position. In response to a predetermined operation of the holding means held by the camera and a camera other than the switching means, the photographing lens is moved to the proximity position. As described above, the urging means for urging the lens driving means, and the holding means for responsive to the photographic lens being driven toward the proximity position by the urging of the lens driving means by the urging means. And a releasing means for releasing the holding of the switching means and returning the switching means to the lens retracted position.