JPS61278829A - Electrically driven camera - Google Patents

Abstract

PURPOSE:To obtain an electrically driven camera characterized by easy handling and multi-function and prevented from misoperation by executing plural operations of the camera by the one-way rotation of a motor and starting the motor for plural operations by one switch. CONSTITUTION:Since gears 16, 20 are driven in the reverse directions each other by the rotation of the motor, planetary gears 17, 21 are also rotated around respective axes in the reverse directions each other and also revoluted in the reverse directions against respective self-rotation and the 1st and 2nd clatch levers 15, 19 are rotated to constitute a clatch mechanism for switching power transmission systems. A planet gear device 50 to be a driving device for executing one operation of the camera moves lenses to switch a focal distance. When a driving gear 51 is rotated, a planetary gear 52 rotates around its axis simultaneously with its revolution while engaging with a fixed inner gear 53 having twice the knurled circumference of the gear 52, so that a driving pin 54 planted on the knurled circumference of the gear 52 through a fitting plate 54a is straight moved with strokes corresponding to the knurled circumference of the gear 53 in the optical axis direction of the camera.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric camera that can be driven by a single motor that incorporates film winding, rewinding, and other camera operations.

[Conventional technology]

In recent years, small cameras, especially compact cameras, have been automating camera operations following the automation of exposure and focus adjustment. Cameras have now been provided that can automatically return the shutter and set the shutter simply by operating a switch.

Up to this stage of camera automation, it is sufficient to have two drive systems that operate by simply switching the motor to forward or reverse rotation, and the mechanism is relatively simple and easy to operate. It is now possible to organize the system into a structure that does not pose any risk of erroneous operation.

[Problem that the invention seeks to solve]

However, when a camera operation other than film transport, such as lens movement for focal length switching, is added to such a camera and this operation is also driven by the aforementioned motor, one of the drive systems or two systems may be used. Therefore, it is necessary to perform a switching operation of the drive mechanism related to this, and at the same time, it is also necessary to switch the control circuit in order to control the rotation time of the motor in accordance with the switching.

One possible method for switching this control circuit is to provide dedicated switches for film transport and lens movement, and operate either one of them, but since there are two operation switches, it is easy to make erroneous operations. As the number of inputs increases, the scale of the control device becomes large and expensive, resulting in an increase in the cost of the camera.

The present invention solves this problem and improves it, thereby providing an electric camera that is free from the risk of erroneous operation (and capable of controlling the rotation of the motor in one direction to two drive systems using a relatively small-scale control device). The purpose is to

[Means for solving problems]

The above object is characterized in that a plurality of operations of the camera are performed by rotating one motor in one direction, and the activation of the motor for the plurality of operations is performed by one switch. Achieved by a motorized camera.

〔Example〕

One embodiment of the invention is shown in FIGS. 1-4.

FIG. 1 is a perspective view of the bottom of the camera body as viewed from the direction of the back cover, and shows each component expanded 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, ] 2.13 is rotatably attached to the shaft or shaft hole on the bottom base plate 1 as one unit with two large and small gears, and the gear (not shown) on the motor shaft is connected to the dog gear 110, Further, the small gear of the gear 11 meshes with the dog gear 120, and the small gear of the gear 12 meshes with the large gear 130, forming a reduction gear train.

Reference numerals 15.19 and 15.19 denote first and second flange levers respectively pivoted on the shafts 10.20 & of the bottom base plate 1;
The gear 1 is located at the center of rotation 15a of the clutch lever 15.
A gear 16 that meshes with the small gear 3 is attached to the end thereof, and a planetary gear 17 that meshes with the gear 16 is attached to the end thereof. A gear adder meshes with the pinion via an intermediate gear 14, and a planetary gear 21 that meshes with the gear adder 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 to rotate the first and second clutch levers 15 and 19 to switch the power transmission system.

18 and n are the first and second clazotilever 15, respectively.
．． The above-mentioned clutch mechanism is controlled by operating an engagement pin installed at 19 and regulating its position as described later.

Reference numerals 31 and 41 refer to a rewinding gear and a lens driving gear which are rotatably mounted on the shafts (9) and 40 of the bottom base plate 1, respectively, so as to be able to rotate in free directions. The lens drive gear 41 is in mesh with the large return gear 32, and the lens drive gear 41 is in mesh with a large lens drive gear 42 which is pivotally attached to the shaft 40a.

Oh, when the timing belt pulley is rotated, the pulley A is driven via the timing belt TV, and the rewinding clutch is coaxially integrated with the pulley for the timing belt. The film is rewound by rotating A.

43 is a coaxially integrated gear with the large gear 42 for driving the lens, and the gear 43 is connected to a dog gear 440 which is pivotally attached to the shaft 40b.
Furthermore, a gear 4 in which a small gear of the gear 44 is pivotally attached to a shaft 40c
50 large gear, which in turn forms a reduction gear train in which the gear 45 meshes with the drive gear 51 of the planetary gear blade.

The planetary gear blade is an example of a drive device for performing one operation of the camera, and in this embodiment, it is a device for moving a lens for switching the focal length.

In this embodiment, the focal length is switched by moving the lens barrel in the optical axis direction, that is, by collapsing and extending the lens barrel to insert and remove it from the optical axis. This requires a drive member with a relatively large stroke, and this embodiment shows an example in which the stroke is obtained from the drive bottle.

That is, when the driving gear 51 rotates, the planetary gear 52 pivotally attached to it meshes with a fixed internal gear 53 having a stepped circle diameter twice as large as the planetary gear 520. The driving bottle bowl, which is installed on the notched circle diameter of the gear 52 via the mounting plate 54a, is linearly moved in the direction of the optical axis of the camera from the position shown in the figure with a stroke corresponding to the notched circle diameter of the internal gear 53. It has a structure that allows it to rise.

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 mounted on the partition plate (not shown).

Reference numeral 61 denotes a rewind button that can be slid in the direction of arrow A on the partition plate, and the claw hook exposed outside the camera is operated by a knob 62 against a tension spring 63; On the lower surface, a protruding material, 65, is inserted through the partition plate,
A protrusion 67 is provided on the side surface.

The front protrusion stops in a state where it is in contact with the side surface of the first protrusion 73 of the hook lever 71 which is pivoted on the shaft 7o of the bottom base plate 1 and biased counterclockwise by the torsion spring 72, and the The protrusion 65 occupies a position slightly apart from the engagement pin 18 on the first clutch lever 15, and the distance between the protrusions is the engagement pin η on the second clutch lever 19! They are placed in widely separated locations.

On the other hand, the second protruding end 74 of the hook lever 71 occupies a position facing the bin 83 of the release lever 81 which is pivoted between the axes of the bottom base plate 1 and is biased counterclockwise by a torsion spring 82. Since the protruding end of the release lever 81 is locked by the protrusion & of the back cover (not shown) which is closed to the camera body, the second protruding end 74 and the bottle wing are slightly separated from each other. It is maintained.

Reference numeral 91 denotes a switch lever that is biased counterclockwise by a tension spring 93 using a shaft hole 92 as a fulcrum on the side surface of the partition plate, and its right end is also pivoted on the side surface of the partition plate and is biased by a weak torsion spring. The bell crank 94, which is biased counterclockwise by the bell crank 95, is locked by receiving its bent portion, and its left end is connected to the right end of the swing lever Yu, which is pivoted on the same side surface. is in contact with

The SSR is a switch that is activated by one reciprocating swing of the swing lever, and the contact piece 103 is pushed down and released from the contact SSR2, once brought into contact with the contact SSR1, and then brought into contact with the contact SSR2 again as shown in the figure. By doing so, it is possible to instruct the microcomputer shown in FIG. 2 to rotate the motor M in the reverse direction.

Numeral 110 is a lens movement button 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 long groove 111 as a guide, the implanted bottle 113 moves. The switch lever 91
It comes into contact with and rotates clockwise.

SE is a cam 51 &
is turned ON at a position where the drive bin 54 is slightly rotated, and the driving bin 54 is turned ON at both ends of the linear movement described above, that is, at a position where the photographing lens is set at either a long focal length or a short focal length.
The ON and OFF signals of these switches are input manually to the microcomputer.

On the other hand, the film F(y) is inside the film chamber of the camera.
The film F (1
) A driven sprocket 121 that rotates following the movement, and a cam 122 that can rotate integrally therewith are provided, and when the film F moves during winding or rewinding, the cam 122 activates the switch ssP accordingly. A film detection lever 12 is turned ON and OFF every time one frame is fed, and the signal is inputted to the microcomputer.
3 is also provided, and a signal from a switch SF, which is turned off when the rewinding of the film F is completed, is also input to the microcomputer.

FIG. 2 shows a circuit diagram for controlling the motor M in the electric camera of the present invention, which is controlled by the switches described above.

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.

That is, in FIG. 2, when the release button is pressed to operate the rotation switch, the switch S1 is turned on, the power supply circuit is connected, and the microcomputer issues an instruction to the driver to rotate the keyer M in the forward direction.

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 16, the reel gear G1 is rotated clockwise to wind up the film.

On the other hand, at the same time, since the gear 13 is rotating the gear side counterclockwise via the intermediate gear 14, the second clutch lever 19, which is in frictional contact with the gear side, is also rotated counterclockwise. The planetary gear 21 is brought into mesh with the tin rocket gear G2.

Since the planetary gear 21 is rotated clockwise by the gear, the sprocket gear G2 is rotated counterclockwise to feed the film.

In other words, after the film is fed by a tin rocket, it is wound upside down on 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. K is arranged so that when the film is stopped, winding of one frame of film is performed.

Next, in the state shown in Fig. 1, the lens movement button ]10
When the switch lever 91 is slid in the direction of arrow B, the switch lever 91 rotates clockwise, and its left end rotates the swing lever 98 counterclockwise and presses down the contact piece 103, so that the lens movement button 110 When you release your hand from the switch, the switch SSR acts as described above and the motor starts rotating in the reverse direction.

As a result, the gear 16 rotates counterclockwise, causing the first clutch V bar 15 to rotate counterclockwise as well, but at a position where the planetary gear 17 is disengaged from the reel gear Gl, the engaging gear 16 is rotated counterclockwise. 18 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 side rotates clockwise and the second
Since the clutch lever 19 is rotated in the same (clockwise) direction, the planetary gear 21 is disengaged from the tin rocket gear G2 and the engagement pin 4 is moved to the protrusion of the rewind button 61 □□
Until it comes into contact with □, it will be in a state of meshing with the lens drive gear 41.

Therefore, the rotation of the motor starts from the lens drive gear 41, passes through the lens drive large gear 42, and then passes through the gears 43, 4, and 4.
5 to the planetary gear set 50.

The linear movement of the driving pin between the planetary gears causes the lens barrel to retract and extend, and the focal length of the photographic lens is changed. As a result of the high-level signal being input to the microcomputer, the microcomputer is instructed to wait for a low-level signal due to the OFF of the switch SE, and the drive gear 51 is actuated by the cam 51a at a position where the drive gear 51 has made one-half rotation. The OFF signal instructs the driver to stop the reverse rotation of the motor M.

Therefore, after this, when the release button is pressed and the switch S1 is turned on, the motor M is rotated in the normal direction again, and the film is ready to be wound.

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 lever 81 comes into contact with B/&3 and is stopped, even if the user releases the rewind button 61, the protrusion is supported by the first protrusion 73, and the rewind button 61 does not slide. held in position.

In this state, the protrusion 65 is attached to the first clutch lever 15.
The other protrusion is moved away from the engagement pin 18 of the second clutch lever 19 to a position where it does not interfere with the 70-rotation range, while the other protrusion is slightly close to the engagement pin n of the second clutch lever 19 to prevent its rotation. It occupies a position that partially regulates the range.

mosquito! When the rewind button 61 is further slid in the direction of the arrow A, the protrusion 67 presses the bent portion 97 of the bell crank 94 and rotates the bell crank 94 counterclockwise. The switch lever 91 is rotated clockwise by the bent portion.

As a result, when the rewind button/61 is released, the switch SSR 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 clutch lever 1
5 is detached from the reel gear 91 and then rotates further counterclockwise than in the case of lens movement to the planetary gear 17.
meshes with the rewinding gear 31, and the rewinding gear 31 is rotated counterclockwise.

Therefore, the rewinding large gear 32 and the boolio rotate clockwise, driving the pulley 34 via the timing belt Tv, and rotating the coaxially integrated rewinding clutch clockwise to wind the film. It is now ready to return.

On the other hand, the second clutch lever 19 rotates clockwise to disengage the planetary gear 21 from the sprocket gear G2 and attempts to rotate further clockwise, but at that position the protrusion 66 engages with the engagement. Since the planetary gear 21 occupies the position where the pin n is locked, the planetary gear 21 idles and does not transmit its rotation to any drive system.

In this way, the rewinding of the film P begins, but as a result of the rotation of the driven Sugerocket 121 and the cam 122, a high level-〇-level alternating signal is input to the microcomputer due to the ON and OFF states of the switch SSP.As a result, the microcomputer switches the switch SF. When the end of the film F passes, the film detection lever 123 rotates and film rewinding is completed, and a signal from the switch SF is input to the microcomputer. An instruction is given to the driver to stop the reverse rotation of the motor M.

When the back cover of the camera is opened after the motor M has stopped, the protrusion retracts in the direction of the arrow, the release lever 81 rotates counterclockwise, and the pin 83 moves to the second position of the hook lever 71.
Pressing the tip 74 acts 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 lens can be moved again by operating the lens movement button.

When the sequence of the control circuit in the lens movement and film rewinding operations explained above is displayed in a time chart, it becomes as shown in Fig. 3, and the power hold time of the reverse rotation operation of the motor in each operation is indicated by the symbol P.
This is illustrated by the chart labeled H.

FIG. 4 is a flowchart showing the functions of the electric camera of the present invention, and the operations are performed in the following order.

When the battery is installed in the camera and the power can be turned on, if the switch SSR is not turned on, the camera is in the shooting position.

Therefore, distance measurement is performed by the first stroke of the release button.
The photometry function operates, and then the second stroke, that is, the second release, drives the lens for focusing and drives the shutter based on the photometry results, completing the exposure. After exposure, when the release button is returned to its original position, the lens is returned to its initial position and the film is wound, thereby completing the frame-to-frame photographing cycle.

On the other hand, when the switch SSR is turned on, the power supply and microcomputer circuit in Fig. 2 are connected, and further SSR is turned on.
Even if the SR is turned off, the circuit enters a power hold state, and the state in which the microcomputer supplies the motor with reverse rotation current continues.

If the switch SE is turned ON at this stage, it is determined that the lens movement sequence is in progress, and the switch 5ELf) is turned OFF, that is, the collapsing or extending of the V-lens lens barrel is completed, and the motor is stopped by turning the switch SE OFF.

Furthermore, if the switch SE is not turned ON at the above-mentioned stage and the switch SSP is in a state where the 0N-OFF signal is repeated, it is determined that the film rewinding sequence has occurred, and the switch SF is turned OFF.
The rotation of the motor is stopped by passing F'F, that is, the end of the film.

That is, a control device such as a microcomputer monitors each operation such as lens movement and rewinding using monitoring means such as switches. Control after the motor is started is performed by a control device such as a microcomputer based on signals from switches serving as monitoring means.

In this way, the electric camera of the present invention is configured so that both lens movement and film rewinding can be performed by utilizing the reverse rotation of the film winding motor, and both operations can be performed by a single motor. It is characterized in that a sequence of reverse rotation of the motor that is started by switching a switch and that immediately responds to each operation is organized by signals from the switch obtained from each of the operations as a monitoring means, and as a result, the rotation direction can be changed. Since only one switch is required, the microcomputer can be small in size, which is economically advantageous, and the space for accommodating the microcomputer is also small, making it an extremely advantageous invention for compact cameras.

In this embodiment, the lens movement and film rewinding operations in the shooting lens are shown as multiple operations activated by rotation of the motor in one direction, but the electric camera of the present invention is not limited to these operations. It can also be applied to all other camera operations.

[Effects of the Invention] According to the present invention, a multi-functional electric camera that is easy to handle and free from erroneous operation can be provided.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the main parts of the electric camera of the present invention. Figure 2 is a circuit diagram for controlling the motor. FIG. 3 is an operation time chart of the circuit. FIG. 4 is an operation flowchart of the circuit. 15... First clutch lever 19... Second clutch lever 31... Rewinding gear 41... Lens drive gear I... Planetary gear mechanism 51a, 122...
Cam 61... Rewind button 110... Lens movement button 121... Followed sprocket 123...
Film detection lever 81... (trigger) switch SSR... (motor reverse) switch SE... (lens movement) switch SSP... (film transport) switch SF... (end of rewind) switch F. ...Film applicant: Roku Konishi Photo Industry Co., Ltd. Figure 2 Figure 3 M PH PH← Figure 4

Claims (2)

[Claims] (1) A motor-driven device characterized in that a plurality of camera operations are performed by rotating one motor in one direction, and the motor for the plurality of operations is activated by a single switch. camera. (2) A control device comprising a means for monitoring each of the plurality of operations and controlling the motor after it is started using a signal from the monitoring means. electric camera.