JPS61258233A - Camera - Google Patents

Abstract

PURPOSE:To switch an operation only with the operation of an operating member by providing a lock mechanism which is interlocked with the operation of a rewinding operation member and inhibits the operation of a lens moving operation member when the rewinding operation member is operated erroneously. CONSTITUTION:When a rewinding button 61 is slid in the direction of an arrow A, a projection 67 presses the bending part 97 of a bell crank 94 to rotate the bell crank 94 counterclockwise, and a switch lever 91 is turned clockwise by the other bending part 96. As the result, a switch 100 is operated similarly to the case of lens moving to start the reverse rotation of a motor when the rewinding button 61 is released, and the first clutch lever 15 is rotated counterclockwise more than the case of lens moving after being disengaged from a reel gear G1 and engages a planetary gear 17 with a rewinding gear 31, and the gear 31 is rotated counterclockwise. Thus, switching operations are selected optionally with one motor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera in which film winding, rewinding and lens movement are also driven by a single motor.

[Conventional technology]

In recent small cameras (especially compact) W cameras, automation of camera operation has progressed following the automation of exposure and focus adjustment, and now cameras have small, high-performance motors built into them to advance and rewind the film. Furthermore, there are cameras that automatically set the shutter and the like simply by operating a switch.

The structure of the drive system of this type of camera is that each operation, such as film winding, rewinding, and shutter setting, as described above, is carried out separately and independently by switching the rotational direction of the motor and a simple latch mechanism. If you wish to add more activated functions, the power transmission and
A switching mechanism must be provided completely separately (this results in a drawback that the structure and operation become more complicated).

For example, in order to realize a camera in which this motor can perform completely separate operations such as film winding and rewinding, such as changing the focal length, it is necessary to have a simple structure, low power loss, and easy operation. There is a need for a new efficient power transmission device that is easy to operate and free from the risk of erroneous operation.

[The problem that the invention aims to address]

The present invention provides a camera in which film rewinding or focal length switching can be performed from the film winding state by simply operating either the film rewinding or focal length switching operation member. .

[Means for solving problems]

The present invention provides two clutch levers each having a planetary gear that revolves depending on the direction of rotation of the motor, and when the motor rotates in the forward direction, the planetary gear meshes with the film take-up reel gear and the sprocket gear, respectively. Film winding is performed by transmitting the rotational motion of the two motors, and when the motor is switched to reverse rotation, the swinging of the first clutch lever due to the revolution of the planetary gear is restricted to a predetermined position, and the second
Either the planetary gear of the second clutch lever is meshed with the lens driving gear for focus switching and its rotational movement is transmitted L7 to move the lens, or the swinging of the second clutch lever is restricted to a predetermined position and the second clutch lever is In a power camera configured to rewind the film by meshing the planetary gear of the first clutch lever with the film rewinding gear and transmitting its rotational motion, the swinging of the second clutch lever is restricted to a predetermined position. This device is constructed so that a locking mechanism is activated to prevent lens movement when the lens is moved.It has a rewind operation member and a lens movement operation member, and in a camera in which rewind and lens movement are performed by the same motor, the rewind operation is This is achieved by a camera characterized by a locking mechanism interlocked with the operation of the member (~erroneous rewinding operation member) which prevents operation of the lens movement operation member.

〔Example〕

An embodiment of the invention is shown in FIGS. 1 and 2.

FIG. 1 is a perspective view of the bottom of the camera body viewed from the direction of the camera, showing each component in its mounting position.

Reference numeral 1 designates a bottom base plate forming the bottom surface of the camera body, which is integrally connected to the camera body after the components shown in the figure are assembled, and the functions of each drive system are connected thereto.

11, 12, and 13 are all 2fl large and small! The gear 110 is rotatably attached to the shaft or shaft hole on the bottom base plate 1, and the gear (not shown) on the motor shaft is the large gear 110, and the small gear 11 is the gear 12. A reduction gear train is formed in which the small gear of the gear 12 meshes with the large gear of the gear 13 in sequence.

Reference numerals 15 and 19 denote first and second clutch levers which are respectively attached to the shaft 10 of the bottom base plate 1, and which mesh with the pinion of the gear 13 at the rotation center 15m of the first clutch lever 15. A planetary sprocket 17 that meshes with the gear 16 is pivotally attached to the end of the gear 16, and an intermediate gear 14 is attached to the rotation center portion 19a of the second clutch lever 19 in contrast to the pinion of the gear 13. A gear turn that meshes with the gear cylinder is attached to the end thereof, and a planetary gear 21 that meshes with the gear cylinder is pivotally attached to the end.

That is, since the gear 16 and the gear are driven in opposite directions by the rotation of the motor, the planetary gear 17.21
The clutch mechanism rotates in opposite directions and also revolves in the opposite direction of rotation to rotate the eleventh and second clutch levers 15 and 19 to switch the power transmission system.

18 and 22 are the first and second clutch levers 1, respectively.
The above-mentioned nine clutch mechanism is controlled by operating the engaging pin installed in 5.19 and regulating its position as described later.

31. 41 is a rewinding gear and a lens drive gear which are rotatably mounted on the shafts (9) and 40 of the bottom base plate 1, respectively, and the rewinding gear jlL31 is mounted on the shaft 30a [7]. The lens driving gear 41 meshes with a large lens driving gear 42 which is pivotally attached to the shaft 401.

33. 34 is a timing belt boolean which is coaxially integrated with the large unwinding gear 32. When the boolean IJ 33 is rotated, the pulley is driven via the timing belt TV, The film is rewound by rotating the rewinding clutch.

Numeral 43 is a gear coaxially integrated with the lens driving large gear 42, and the gear 43 is simply a large tooth of a gear 44 that is pivotally attached to the shaft 40b.
Furthermore, the small gear of the gear 44 is attached to the shaft 40c, and the nine gear 4
5, the gear 45 then meshes with the drive gear 51 of the planetary gear set 50, forming a reduction gear train with these gears 43, 44, 45.

The idling gear device is a device that performs another operation operated by the drive system of the camera, that is, in this embodiment, a device that moves the lens for focal length switching.

In this example, switching the focal length of the H[la lens is as follows:
The convergecon lens is inserted into and removed from the optical axis by moving the lens barrel in the optical axis direction, that is, extending and collapsing the lens barrel. Therefore, in order to change the focal length, a relatively large distance in the optical axis direction is required. This requires a stroke drive member. This embodiment shows an example in which the stroke is obtained from the FM moving bin.

That is, when the drive gear 51 rotates, the planet gear 52 eccentrically attached to the drive gear 51 meshes with an internal gear wheel having a stepped circle diameter twice as large as the planet gear 520, and simultaneously rotates and rotates around the planet. The driving pin fixed to the position of the notched circle of the gear 52 via the support 54a is caused to move linearly from the illustrated position in the direction of the optical axis of the camera with a stroke corresponding to the notched circle diameter of the internal teeth. It has a structure.

On the other hand, the bottom base plate 1 in which the above driving members are installed
The upper surface of the device is covered with a partition plate (not shown), and each operating member described below is attached to the partition plate (not shown).

Reference numeral 61 denotes a rewind button which is a rewind operation member that can be slid on the partition plate in the direction of arrow A, and the claw hook exposed outside the camera is operated by a knob 62 against the tension spring 153. The return button 61 has the partition plate 't-pierced (
It is provided with a protrusion 154, a bar, and a bolt, and a protrusion 67 on the side surface.

The protrusion 64 locks the side surface of the first protruding end 73 of the lever 71 attached to the shaft 70K9 of the bottom base plate 1 and biased counterclockwise by the torsion spring 72. Engagement pin 1 on the first clutch lever 15
The protrusion 66 is located at a position slightly 1.7 points away from the engagement pin a on the second clutch lever 19.

On the other hand, the second protruding end 74 of the Tsukuku lever 71 occupies a position facing the pin 83 of the release lever 81 which is pivoted between the axes of the bottom base plate l and is biased counterclockwise by a torsion spring 82. , since the protrusion of the release lever 81 is locked by a protrusion 85 of the back cover (not shown) that is required to be in the closed state with respect to the camera body, the second protrusion 74
and the bottle B are kept in a slightly frowning state.

Reference numeral 91 denotes a switch lever which is biased counterclockwise by a tension spring 93 using a shaft hole 92 as a fulcrum in the side part of the partition plate, and its right end part is similarly pivoted to the side part of the partition plate and is not easily torsioned. A bell crank 94 biased counterclockwise by a spring 95 is locked by receiving its bent portion 96, and its left end is connected to the right end of a swing lever 98 pivoted on the same side surface. 17').

The contact piece 103 is pushed down by an electric circuit switch that causes the 100 Fi motor to rotate in the reverse direction, exposed from the contact piece 101, once brought into contact with the contact piece 102, and then turned back to the contact piece 101 as shown in the figure.
By making contact with the motor, an electric circuit for reverse rotation is maintained, and when a predetermined operation is completed, the electric circuit is cut off by the accompanying signal and the motor is stopped.

A lens movement button 110 is a lens movement member that can be operated from outside the camera in the same way as the rewind button 62, and when it slides against the tension spring 112 in the direction of arrow B using the length 1111 as a guide, it The provided bin 113 comes into contact with the switch lever 91 and acts to rotate it clockwise.

Each operation of film winding, film rewinding, and lens movement according to the present invention and the operations thereof will be explained below.

In FIG. 1, when the release button of the camera is pressed, the motor rotates clockwise, the gear 11 rotates counterclockwise, the gear 12 rotates clockwise, and the gear 13 rotates counterclockwise.

Therefore, the gear 16 that meshes with the gear 13 rotates clockwise, and the first clutch lever 15, which is in frictional contact with the gear 16, is also rotated clockwise to wrap the planetary gear 17 into a film. It meshes with the reel gear G1. Since the planetary gear 17 is rotated counterclockwise by the gear 1G, the reel gear G1 is rotated clockwise to wind up the film.

On the other hand, at the same time, the gear 13 rotates the gear (9) counterclockwise via the intermediate gear 14, so that the second clutch lever 19, which is in frictional contact with the gear, is also rotated counterclockwise. Move the planetary gear 21
mesh with the rotary gear G2. Therefore, the planetary gear 21t
Since the gear is rotated clockwise, the sprocket gear G2 rotates counterclockwise to feed the film.

In other words, after the film is fed by a sprocket, it is viewed upside down by a take-up reel (none of which is shown), and the rotation of the motor is controlled based on a signal detected from the rotation angle of the sprocket. Appropriate means are provided so that one frame of film is wound up each time the film is stopped.

Next, in the state shown in FIG.
When the switch lever 91 is slid in the direction of arrow B, the switch lever 91 is rotated clockwise by the pin 113, and its left end rotates the swing lever 98 counterclockwise, causing the contact piece 103 to rotate in the counterclockwise direction.
When the user releases the lens movement button 110, the above-described through switch 100 is activated to rotate the motor in the reverse direction.

As a result, the gear 16 rotates counterclockwise, so the first clutch lever 15 is also rotated counterclockwise, but the engaging pin 18 is rotated at the position where the planetary gear 17 is disengaged from the reel gear G1. is locked by the protrusion of the rewind button 61. Therefore, the planetary gear 17 idles at that position and does not transmit its rotation to any drive system.

On the other hand, at the same time, the gear m rotates clockwise and the second gear m rotates clockwise.
Since the clutch lever 19 is also rotated clockwise, the above-mentioned It will be in a state of meshing with the lens drive gear 41.

Therefore, the rotation of the motor is from the lens drive gear 41 to the lens drive large gear 42 and then to the gears 43 and 114.
5 to the planetary gear set [50].

The lens barrel is extended and retracted by the linear movement of the drive bin diagram in the planetary gear system gL5o, and the focal length of the photographing lens is changed, but the rotation of the motor is stopped by a signal that detects a half rotation of the drive gear 51. l-
This completes one round trip or one round trip of the lens.

Therefore, when the release button is pressed from this state, the motor starts to rotate forward again and the first and second clutch levers 15, 19 are returned to the positions shown in FIG. 1, allowing the film to be wound. I can do it.

On the other hand, when the rewind button 61 is slid in the direction of arrow A in the state shown in FIG. Since the release lever 81 comes into contact with the bin 83 and is stopped, even if the rewind button 61 is released, the protrusion B
is supported by the first protruding end 73, and the rewind button 61 is held in the sliding position.

In this state, the protrusion 65 is attached to the first clutch lever 15.
The other protrusion 66 is retracted to a position that is far away from the engagement pin 18 and does not impede its rotation range;
The clutch lever 19 is in a position slightly close to the engagement pin ρ and partially restricts its rotation range.

When the rewind button 61 is further slid in the direction of arrow A from this state, the protrusion 67 presses the bent portion 97 of the bell crank 94, causing the bell crank 94 to rotate counterclockwise. The switch lever 91 is rotated clockwise by one bent portion 96.

As a result, when the rewind button 61 is released, the switch 1oo is activated and the motor starts to rotate in the reverse direction, as in the case of lens movement described above, so that the first clutching bar 1
5 is detached from the reel gear G1, rotates further counterclockwise than in the case of lens movement, and then rotates to the planetary gear 17.
meshes with the rewinding gear 31 to rotate the rewinding gear 31 counterclockwise.

Therefore, the large rewinding gear 32 and the pulley rotate clockwise, driving the boot IJ 34 via the timing belt TV, and rotate the coaxially integrated rewinding clutch clockwise to film the film. The state is such that rewinding is performed.

On the other hand, the second clutch lever 19 rotates clockwise to shift the planetary gear 21 from the sprocket gear G2 to the I.
l! When the protrusion is pulled out and attempts to rotate further clockwise, the protrusion locks the engagement pin 4 at that position, so the planetary gear 21 idles and its rotation is not controlled by any drive system. It also becomes a state where it is not transmitted.

In this way, the film is rewound, and when the rotation of the motor is stopped based on a signal indicating the end of rewinding obtained from the result of detecting the presence or absence of film, for example, when the back cover of the camera is opened, the protrusion 85 becomes The release lever 81 rotates counterclockwise by retracting in the direction shown C, and the pin 83 presses the second protruding end 74 of the hook lever 71 to rotate the hook lever 71 clockwise. .

Therefore, when the back cover is opened, the rewind button 61 is pressed again to the first position.
When the camera returns to the position shown in the figure and closes the back cover after loading a new film, the film can be wound again by operating the release button.

However, in a camera having such a function, the rewind button 61 must first be slid one step in the direction of arrow A, and the lens movement button/110 may be inadvertently pressed while the hook lever 71 is locked. Even if it is operated in direction B, the motor will rotate in the opposite direction and the film will be rewound.

Such a phenomenon is not a desirable function for a camera in which handling is simplified by configuring the rewind and lens movement to be freely switched by operating only independent dedicated buttons.

Therefore, in the present invention, as shown in FIG. 2, a locking member 61m is provided connected to the rewind button 61, and when the rewind button 61 is locked to the hook lever 71 and the locking member 61a is located above the top 110a of the lens movement button/110, and the lens movement button 11G
It is configured to prevent the sliding of the

As a result, the above-mentioned phenomenon is prevented, and film rewinding is performed only by the normal operation of sliding the rewind button 61 further in the direction of arrow A.

When the camera is placed in the film winding state, the rewind button 61 is disengaged from the hook lever 71 and is at the initial position as shown in FIG. Top portion 110a of lens movement button 110
Since the upper part of the lens is retracted, it is possible to operate the time-limited lens movement.

Note that the present invention is not limited to the embodiments described above, and various modifications are possible. In the above embodiment, the lens is moved by converting the rotary motion of the motor into a linear motion, but the present invention can also be applied to other operations, such as moving a lens cover or moving a flashlight.

〔Effect of the invention〕

The present invention provides an extremely multi-functional compact camera in which the operations of film winding, film rewinding, and photographic lens focus switching can be arbitrarily selected using a single built-in motor with simple operation. Koto＼Nari9.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the main parts of a power transmission mechanism of a camera to which the present invention is applied. FIG. 2 is a perspective view of the operation locking mechanism in the camera of the present invention.

Claims (1)

[Claims] In a camera that has a rewind operation member and a lens movement operation member and uses the same motor to perform rewind and lens movement, the lens movement operation member is moved in conjunction with the operation of the rewind operation member, and when the rewind operation member is operated. A camera characterized by being provided with a locking mechanism that prohibits operation.