JP2683146B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a camera capable of winding and rewinding a film by rotating one driving source in the same direction.

[Prior Art] Conventionally, a planetary gear clutch has been used as a film feeding mechanism of a camera with a built-in motor, and the rotational force of the motor is selectively switched between the film winding upper side and the film rewinding side. Rotate to wind the film,
The present applicant has already proposed a method in which rewinding can be performed. In the proposed device, in order to perform winding and rewinding by rotating the motor in the same direction, a winding transmission system,
The rewinding transmission system is distributed to the upper and lower surfaces of the camera to correspond to each. The first and second planetary clutches are also distributed to the same upper and lower surfaces, and either one of the two planetary clutches is inactive (drive transmission system and meshing engagement) depending on whether the operation mode of the camera is winding or rewinding. By arranging the levers so that the respective operating portions are located on the upper and lower surfaces of the camera, the hoisting and rewinding are selectively performed. The return of the lever to the initial state is linked to the opening and closing of the back cover.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional proposal method, two planetary clutches are arranged on the upper and lower surfaces of the camera, respectively,
In addition, the lever for selectively limiting the revolution of one planetary gear also needs to be a large lever body so that the two operating portions are located on the upper and lower surfaces of the camera, resulting in an increase in the size of the entire camera. The problem arises. Further, since each operating portion of the lever becomes longer than the swing center, it is required to improve the accuracy of parts and the mounting accuracy. If there is an error, both planetary gears of the hoisting system and the rewinding system are At the same time, an accident occurs in which the gears mesh with the respective transmission gears, and the two transmission systems bulge through the film.
Furthermore, in order to return the initial state by interlocking the opening and closing of the back cover with the lever, it is necessary to always apply a spring stronger than the spring for switching and swinging the lever through the back cover. . This always gives the back lid a spring force that resists a large moment caused by the long length from the swing center of the lever body to the operating portion, and causes a problem of deformation of the back lid. It will be.

[Means for Solving the Problems] In the invention according to claim 1 of the present application, the film winding operation and the film rewinding operation are performed by the same drive source, and the film winding transmission system and the drive source are connected and disconnected. The first planetary clutch mechanism, and the second planetary clutch mechanism that connects and disconnects the film rewinding transmission system and the drive source.
And the planetary gears included in the second planetary clutch mechanism are selectively revolvable so that the first drive source
In a camera that performs a film winding operation and a film rewinding operation by rotating in the direction of, the first planetary clutch mechanism and the second planetary clutch mechanism are arranged on one side of the camera, and the drive is performed on the one side. A lever that swings when the source rotates in a second direction is provided, and the swing of the lever permits the revolution of the planetary gear included in the first planetary clutch mechanism, and the lever is included in the second planetary clutch mechanism. Switching from a state in which the revolution of the planetary gear is restricted to a state in which the revolution of the planetary gear included in the first planetary clutch mechanism is limited and the revolution of the planetary gear included in the second planetary clutch mechanism is permitted. Characterize.

The invention according to claim 2 of the present application is a pre-winding type camera in which all the frames are wound up when the film is loaded, and thereafter, the film is rewound for each photographing, and the film is wound and wound by the same drive source. A first planetary clutch mechanism that connects and disconnects the film winding transmission system and the drive source, and a second planetary clutch mechanism that connects and disconnects the film rewinding transmission system and the drive source for returning. A camera that is provided to allow the planetary gears included in the first and second planetary clutch mechanisms to selectively revolve, thereby performing a film winding operation and a film rewinding operation by the first direction rotation of the drive source. In the above, the first planetary clutch mechanism and the second planetary clutch mechanism are arranged on one side of the camera, and the one side of the camera rotates in the second direction. A lever that swings in conjunction with the opening / closing operation of the back cover is provided, and the swing of the lever that interlocks with the rotation of the drive source in the second direction causes the revolution of the planetary gears included in the first planetary clutch mechanism. The first permitting and limiting the revolution of the planetary gears included in the second planetary clutch mechanism
From the state of 2), the revolution of the planetary gear included in the first planetary clutch mechanism is restricted, and the state is switched to the second state of permitting the revolution of the planetary gear included in the second planetary clutch mechanism. The second state is switched to the first state by swinging the lever in conjunction with the opening / closing operation of.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
1 to 4 show the film feeding mechanism of the camera according to this embodiment, and are shown as plan views seen from the lower surface of the camera body.

In the figure, 1 is the camera body, 2 is a part of the back cover,
Reference numeral 3 indicates a film take-up spool. Reference numeral 4 is a motor, and 5 is a pinion gear, which is fixed to the shaft of the motor 4. 6 and 7 are reduction gears, 8 and 9 are sun gears, and 10 and 11 are planetary gears that revolve around the sun gear 8 and the sun gear 9, respectively. Reference numerals 12 and 13 denote planetary levers that hold the planetary gears 10 and 11, and are rotatably supported coaxially with the sun gears 8 and 9, respectively. Reference numeral 14 is a hoisting transmission gear, 15 is a spool gear meshing with the hoisting transmission gear, and the spool gear 15 and the spool 3 are configured to rotate integrally. Reference numerals 16 and 17 denote rewinding transmission gears, which are interlocked with a film rewinding fork (not shown). 18 is a charge cam gear, a charge cam 18a
Are integrally configured. Reference numeral 19 is a lever-shaped restricting member that restricts the revolution of the planet gears 10 and 11, and the arm portions 19a, 19b, 19c and 19
While having d, it is rotatably supported coaxially with the sun gear 8 and is constantly urged clockwise by a spring 20. Reference numeral 21 denotes a reset lever for rotating the restriction member 19 counterclockwise against the force of the spring 20, which is rotatably supported by a shaft 21a and is rotated clockwise by a spring 22 stronger than the spring 20. Being energized. The reset lever 21 has an abutting portion 21b portion against the back cover 2 and an abutting portion 21c portion against the regulating member. Reference numeral 23 is a locking lever that locks the regulating member 19 in the first illustrated state. The locking lever 23 is rotatably supported by a shaft 23a and is biased counterclockwise by a spring 24 to the locking lever 23. Is provided with a locking portion 23b that engages with the restriction member 19 and a contact portion 23c that is pushed up by the charge cam 18a. 25 is rotatably supported by a charge lever 25a that charges a shutter (not shown). The charge lever 25 has a roller 26 as a cam follower at the contact portion with the charge cam, and an operation portion 25b portion for pressing the shutter charge member 27.

Next, the operation of the present embodiment will be described. The film feeding system in this embodiment employs a so-called pre-wide system (pre-winding system). When the camera is loaded with the film and the back cover is closed, the film in the cartridge is once wound on a spool. This is a method of shooting (prewind) and then rewinding each frame and shooting. FIG. 1 shows the state during this prewind. In this state, the regulation member
The arm portion 19a of 19 is locked by the locking portion 23b of the locking lever 23. In this state, when the motor 4 rotates clockwise, the sun gear 8 rotates counterclockwise and the planetary gear 10 rotates.
Also revolves counterclockwise. At this time, the planetary lever as shown
Since there is a gap between the pin 12a of 12 and the arm portion 19b of the restriction member 19, the planetary gear 10 is not restricted in its revolution.
This meshes with the transmission gear 14, whereby the rotational force of the motor 4 is transmitted to the spool gear 15, and the spool 3 is rotated clockwise to wind up the film. Meanwhile, at this time, the sun gear 9
Is rotating clockwise, so another planetary gear
11 also tries to revolve clockwise, but since the contact portion 13a of the planetary lever 13 contacts the arm portion 19c of the regulation member 19, the revolution is restricted at the position shown. As a result, the planetary gear 11 only meshes with the sun gear 9 and runs idle, and the rotational force of the motor is not transmitted to the transmission gear 16 and the rewinding fork interlocked therewith, so The film is smoothly wound by the rotation of the spool 3.

Next, when the prewind is completed, the rewinding state for photographing is switched. FIG. 2 shows the state of this switching operation. The motor 4 is rotated counterclockwise to switch from prewind to rewind. As a result, the planetary gears 10 and 11 revolve in the opposite directions to the above. The planet gear 10 revolves clockwise, but the tip of the planet lever 12
12b comes into contact with the stopper pin 28 and stops at the position shown,
The planetary gear 10 is in the idling state. The planetary gear 11 revolves counterclockwise and meshes with the charge cam gear 18, thereby rotationally driving the charge cam gear 18 counterclockwise and stopping the energization of the motor 4 when the charge cam gear 18 makes one rotation. Here, when the charge cam gear 18 makes one rotation, the charge cam 18a pushes up the contact portion 23c of the locking lever 23 and rotates the locking lever 23 clockwise. As a result, the locking of the restriction member 19 by the locking lever 23 is released,
The restriction member 19 is rotated clockwise by the force of the spring 20.
The regulating member 19 rotates clockwise to the second illustrated position, and the switching operation is completed. Then, when the motor 4 is rotated clockwise in this state, the film rewinding operation is performed. This is the state shown in FIG. That is, although the planetary gear 10 tries to revolve counterclockwise by the clockwise rotation of the motor 4, the pin 12a of the planetary lever 12 and the regulating member 19b contact each other, and the regulating member 19 is Since it is urged to rotate clockwise by the spring 20, this urging force is
If you set it higher than the revolution force of the planetary gear 10, the planetary gear
10 cannot revolve more than the position shown in FIG.
On the other hand, the regulating member 19 has already rotated clockwise and the arm portion 19c
Since 13a of the planetary lever 13 is in a position where it does not contact, there is nothing to restrict the revolution of the planetary gear 11, so the planetary gear 11 revolves clockwise and meshes with the transmission gear 16 to form the rewinding force. Rotate to rewind. When the rewinding of one frame is completed and the camera is released, the shutter charging member 27 moves in the direction of arrow A in the figure, but to charge it again, rotate the motor 4 counterclockwise. Then, the planet gear 11 meshes with the charge cam gear 18 and rotates the charge cam 18a, thereby rotating the charge lever 25 in the clockwise direction, and the operating portion 25b charges the shutter charge member 27 again to the position shown in the figure. Therefore, in this state, the film rewinding and the shutter charging can be arbitrarily performed by the forward and reverse rotations of the motor.

Next, when shooting of all frames is completed, the back cover 2 is opened to take out the cartridge in the camera. This state is shown in FIG. When the back cover 2 is opened from the state shown in FIG. 3, the reset lever 21 is rotated clockwise by the urging force of the spring 22. This allows the tip 21 of the reset lever 21 to
C contacts the arm portion 19d of the restriction member 19. At this time, since the biasing force of the spring 22 is set to be stronger than the biasing force of the spring 20, the regulating member 19 is rotated counterclockwise against the biasing force of the spring 20. When returned to the position shown in FIG. 4, the locking lever 23
The arm portion 19a of the restriction member 19 is again locked. When the back cover 2 is closed in this state, the prewinding operation shown in FIG. 1 is again enabled.

The characteristic feature of the above-described embodiment is that the two planetary clutches 8.10.12 and 9.11.
.By arranging 13 and the regulating member 19 on the lower surface side of the camera, the deceleration transmission system from the pinion gear 5 as a drive source can be shortened and the det space of the planetary clutch can be made small, so that the entire camera can be made compact. Was realized. This also means that the lengths of the arm portions 19b and 19c of the restricting member 19 that selectively restricts the revolution of the planetary gears 10 and 11 can be shortened from the swing center, so that part accuracy and position accuracy are not so great. Reliable planetary gears 1 without high precision
It is possible to limit 0 and 11, and it is possible to prevent both planet gears 10 and 11 from meshing with the transmission gears 14 and 16 at the same time. Furthermore, since the length of each arm portion 19b, 19c of the regulating member 19 can be shortened from the swing center, the spring force of the spring 20 that overcomes the revolution force of the planetary gear 10 does not have to be so strong (the revolution force is Determined by the moment based on the distance from the center),
The spring 22 for returning the restricting member 19 to the initial state does not need to be so strong either. Therefore, the back lid 2 which is constantly pressed by the spring force of the spring 22 via the reset lever 21.
Does not receive a large load, and problems such as deformation of the back cover 2 do not occur.

In the embodiment, since the regulating member 19 is supported coaxially with the sun gear 8 of the planetary clutch, the length of each arm can be made shorter. Further, since the cam for swinging the locking lever 23 for switching the revolution limit of the regulating member 19 is also used as the charge cam used for the shutter charge, further parts saving and size reduction can be achieved.

In the embodiment, the restricting member 19 is opened by the opening operation of the back cover 2.
Although the return to the initial position has been performed, it goes without saying that the return may be performed by closing the back lid 2.

[Effect of the Invention] The invention according to claim 1 of the present application performs the film winding operation and the film rewinding operation by the same drive source, and a first planetary clutch that connects and disconnects the film winding transmission system and the drive source. And a second planetary clutch mechanism for connecting and disconnecting the film rewinding transmission system and the drive source.
And the planetary gears included in the second planetary clutch mechanism are selectively revolvable so that the first drive source
In a camera that performs a film winding operation and a film rewinding operation by rotating in the direction of, the first planetary clutch mechanism and the second planetary clutch mechanism are arranged on one side of the camera, and the drive is performed on the one side. A lever that swings when the source rotates in a second direction is provided, and the swing of the lever permits the revolution of the planetary gear included in the first planetary clutch mechanism, and the lever is included in the second planetary clutch mechanism. By switching from the state of limiting the revolution of the planetary gear to the state of limiting the revolution of the planetary gear included in the first planetary clutch mechanism and permitting the revolution of the planetary gear included in the second planetary clutch mechanism. , Swinging the lever by improving downsizing of the camera and reliability of the switching control of the lever, and reducing the operating force of the lever. It played a decrease of the load.

Further, the invention according to claim 2 of the present application is a pre-winding type camera in which all the frames of the film are wound up when the film is loaded, and thereafter, the film is rewound for each photographing, and the film is wound by the same drive source. , A first planetary clutch mechanism for connecting and disconnecting the film winding transmission system and the drive source to perform rewinding, and a second planetary clutch mechanism for connecting and disconnecting the film rewinding transmission system and the drive source And the planetary gears included in the first and second planetary clutch mechanisms are selectively revolvable, so that the film winding and unwinding operations are performed by the first direction rotation of the drive source. In the camera, the first planetary clutch mechanism and the second planetary clutch mechanism are arranged on one side of the camera, and the second direction rotation of the drive source is arranged on the one side. Alternatively, a lever that swings in conjunction with the opening / closing operation of the back lid is provided, and the swing of the lever that interlocks with the rotation of the drive source in the second direction causes the revolution of the planetary gears included in the first planetary clutch mechanism. From the first state in which the revolution of the planetary gear included in the second planetary clutch mechanism is restricted, the revolution of the planetary gear included in the first planetary clutch mechanism is restricted, and the second planetary gear is included. Switching to a second state in which the planetary gear included in the clutch mechanism is allowed to revolve, and switching from the second state to the first state by swinging the lever in conjunction with the opening / closing operation of the back lid. As a result, the size of the camera is reduced, the reliability of the switching control of the lever is improved, and the operating force of the lever is reduced to reduce the load applied to the swing of the lever.

[Brief description of the drawings]

1 to 4 are plan operational views of a camera as an embodiment of the present invention as seen from the bottom side, FIG. 1 shows a state of film winding when a film is loaded, and FIG. Represents the state in which the revolution limit of the planetary gear is switched,
FIG. 3 shows the film rewinding state, and FIG. 4 shows the state in which the back cover is opened and returned to the initial state. 2 ... Back cover 5 ... Pinion gear as drive rotation source 8,9 ...... Sun gear 10,11 ...... Planetary gear 19 ... Regulating member 21 ... Reset lever 23 ... Locking lever

Claims (2)

(57) [Claims] 1. A first planetary clutch mechanism for connecting and disconnecting a film winding transmission system and the driving source, which is configured to perform a film winding operation and a film rewinding operation by the same drive source, a film rewind transmission system, and A second planetary clutch mechanism that connects and disconnects the drive source, and selectively revolves the planetary gears included in the first and second planetary clutch mechanisms, thereby making In a camera that performs a film winding operation and a film rewinding operation by rotating in one direction, the first planetary clutch mechanism and the second planetary clutch mechanism are arranged on one side of the camera, and the one planetary clutch mechanism is arranged on the one side. A lever that swings when the drive source rotates in the second direction is provided. By swinging the lever, the planet gear included in the first planetary clutch mechanism is allowed to revolve, and the second gear From the state where the revolution of the planetary gear included in the planetary clutch mechanism is limited, the revolution of the planetary gear included in the first planetary clutch mechanism is limited and the revolution of the planetary gear included in the second planetary clutch mechanism is permitted. A camera characterized by switching to a state in which it is turned on. 2. A pre-winding type camera in which all the frames of the film are wound up when the film is loaded, and thereafter, the film is rewound for each photographing, and the film is wound and rewound by the same drive source. A first planetary clutch mechanism for connecting and disconnecting the film winding transmission system and the drive source, and a second planetary clutch mechanism for connecting and disconnecting the film rewinding transmission system and the drive source. In the camera, the planetary gears included in the second planetary clutch mechanism are selectively revolvable to rotate the drive source in the first direction to perform a film winding operation and a film rewinding operation. The planetary clutch mechanism and the second planetary clutch mechanism are disposed on one side of the camera, and the second direction rotation of the drive source or the opening / closing operation of the back lid is performed on the one side. A lever that swings in association with the drive source is provided, and the swing of the lever that interlocks with the rotation of the drive source in the second direction permits the revolution of the planetary gear included in the first planetary clutch mechanism. The planets included in the second planetary clutch mechanism are restricted from the first state in which the revolution of the planetary gears included in the second planetary clutch mechanism is restricted to the revolutions of the planetary gear included in the first planetary clutch mechanism. By switching to a second state in which the revolution of the gear is permitted, and by swinging of the lever linked to the opening / closing operation of the back lid,
A camera characterized by switching from the second state to the first state.