JP2568514B2 - Camera shutter device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter charging device in a camera that performs shutter charging simultaneously with winding of a filter by a built-in motor.

2. Description of the Related Art In recent years, the use of motorized cameras has advanced, and most cameras, particularly referred to as compact cameras, have a built-in motor, and the motor performs winding, rewinding, and shutter charging of a filter.

At this time, it is needless to say that a smaller load is preferably applied to the motor, and that an excessive load may be applied to the filter depending on a winding method of the filter.

Now, as a camera which takes the above points into consideration, for example, there is a camera described in Japanese Patent Application Laid-Open No. 60-86532.

In this publication, a planetary gear mechanism is used in a gear transmission system of a charge gear and a motor for performing shutter charging, and the planetary gear is forcibly released when the filter leader unit is wound up, and clockwise during normal winding. The automatic rewinding is realized by a system in which the planetary gear meshes with the transmission system by the revolving motion and the film is fed by sprocket by releasing the planetary gear by revolving in the counterclockwise direction during rewinding. There is disclosed an electric camera capable of performing high-efficiency filter feeding without applying an unnecessary load in the state of winding up or normal winding.

Problems to be Solved by the Invention However, even in the above-described electric camera, the load on the motor has not yet been sufficiently reduced.

In other words, the charge gear is separated from the motor when the filter leader is wound, and the load on the motor is light. However, when looking at the normal winding, the charge gear meshes with the motor drive power transmission system. In addition, a known friction mechanism is provided, and since the rotation of the motor is stopped by one rotation of the charge gear to control the winding of the filter, the charge gear rotates during the winding operation, and the motor in the friction mechanism is rotated. Considering the consumption of the driving force, it is difficult to say that the load applied to the motor is sufficiently small.

The present invention has been made in consideration of the above points, and has as its object to provide a shutter charging device capable of sufficiently reducing a load applied to a built-in motor by a charging operation.

Means for Solving the Problems A shutter charging device for a camera according to the present invention includes a charging member that performs shutter charging by moving from a charge release position to a charge completion position, and a first member that abuts when the charge member is at the charge release position. And a charging lever for rotating the charging member in the direction of the charging completion position by rotating in a predetermined direction against the urging, and rotating. As a result, the charge lever comes into contact with a cam pin provided on the charge lever, rotates the charge lever in a predetermined direction against the urging thereof, and moves the charge lever in a predetermined direction according to the urging when the charging member moves to the charging completion position. And a charge gear having a charge cam having a cam surface to be rotated. The charge system moves the charge member from the charge release position to the charge completion position, and engages with the charge gear to transmit the driving force of the built-in motor to the charge system to charge the charge member from the charge release position. An oscillating gear that is moved between a first position for performing movement to the completion position and a second position for preventing transmission of the driving force of the built-in motor to the charging system without engaging with the charging gear; The gear is rotatably supported and biased to rotate in a direction to move the swing gear to the first position, and the swing gear is moved to the first position by rotating according to the bias, It has a rocking lever that moves to the second position by rotating against the bias, and an end that can rotate and abut the charging member. The charging member is urged to be located at a position where it can come into contact with the charging member in the process of moving from the charge completion position to the charge releasing position. When the charging member moves to the charge releasing position, the charging member rotates against the bias and is charged. A release lever for detecting the movement of the member to the charge release position, and a release lever which is provided integrally with the charge lever and abuts on the swinging lever to follow the bias of the charge lever when the charge member is moved to the charge completion position. A second control end for pivoting the rocking lever in a direction opposite to the bias by the rotation in the direction to position the rocking gear in the second position, and a release lever provided integrally with the charge lever and When the charge member moves to the charge release position when the charge member moves to the charge release position, the charge lever rotates in the direction opposite to the bias of the release lever. By rotating the swing lever in the direction opposite to the bias, the control of the swing lever by the second control end is released, and the swing lever is rotated in the direction according to the bias to rotate the swing gear. And a third control end for positioning the control mechanism in the first position.

Function Since the shutter charging device for a camera according to the present invention is configured as described above, one shutter charging operation is completed by appropriately setting the amount of rotation of the charge gear and the amount of winding of the filter necessary for shutter charging. Thereafter, the transmission of the motor driving force to the charge gear is interrupted by the swing gear, that is, after the charge operation is completed, the charge system including the charge gear does not become a load on the motor,
The load on the motor can be reduced.

Embodiment FIG. 1 is a plan view showing a main part of an embodiment of a shutter charging device for a camera according to the present invention.

In the figure, reference numeral 1 denotes a drive gear which is connected to a motor (not shown) which performs filter transfer and which outputs a driving force when the filter is wound by the motor in a counterclockwise direction.

Reference numeral 2 denotes a swing gear, which is rotatably supported by a shaft 3a on a rotatable swing lever 3 provided coaxially with the drive gear 1 and meshes with the drive gear 1. The state shown in the figure is a state in which shutter charging has been completed, as will be described later, and the swing gear 2 does not mesh with the charge gear 6 described later.

4 is a pin 5 provided on a camera fixing portion (not shown).
A spring provided between the swing lever 3 and the locking portion 3d of the swing lever 3 urges counterclockwise about the shaft 3b of the swing lever 3. The rotation of the swing lever 3 in the counterclockwise direction is controlled by contact between a pin 3c provided on the lever 3 and a control end 8c of a charge lever 8 described later.

Reference numeral 6 denotes a charge gear which is rotatably supported by a camera fixing portion about a shaft 6a and has a charge cam 7. In this embodiment, the charge gear 6 rotates counterclockwise when the film is wound by meshing with the swing gear 2.

Reference numeral 8 denotes a charge lever, which is rotatably supported by a camera fixing portion about a shaft 8a and urged counterclockwise by a spring 9. The charge lever 8 has a control end 8b that contacts a charge member 11 described below, a control end 8c that contacts the pin 3c, and a control end 8d that contacts an end 12c of a release lever 12 described below. A cam pin 8e which comes into contact with the cam surface of the charge cam 7 indicated by a broken line, and a locking pin 8f which locks the spring 9 between the pin 10 provided on the camera fixing portion.

Reference numeral 11 denotes a charging member whose position is a shutter charging completion position, which moves to a charge releasing position indicated by a broken line when the charging state is released by the shutter operation.

Reference numeral 12 denotes a release lever which is provided on the camera fixing portion so as to be rotatable about a shaft 12a and is urged clockwise by a spring 13.When the charge member 11 is moved to the charge release position, the release lever 11 It has a control section 12b that comes into contact with the control end section 8d of the charge lever 8 and a control end section 12c that can come into contact with the control end section 8d.
And a locking pin 12d for locking the spring 13 between them.

Reference numeral 15 denotes a pin provided on the camera fixing portion, and a release lever 12 is provided.
The rotation of the lever 12 in the clockwise direction by the spring 13 is restricted by contact with the control end portion 12c.

The elastic force of each of the springs 4, 9, 13 is set such that the elastic force of the spring 9 is the strongest.

Next, the shutter charging operation of this embodiment
The operation will be described with reference to FIGS.

In the state shown in FIG. 1, the charging member 11 for performing shutter charging is in the charging completed position as described above, and the shutter charging is completed, that is, the next shutter operation is possible.

Now, in the above state, if the charging operation is released by performing the shutter operation, the charging member 11 starts moving from the position shown in FIG. 1 in the direction of arrow A, that is, toward the charge releasing position shown by the broken line. .

The charging member 11 is moved to the release lever 12 during the movement.
And rotates the lever 12 counterclockwise about the shaft 12a against the urging force of the spring 13.

When the release lever 12 rotates counterclockwise, its control end
Reference numeral 12c abuts against and presses the control end 8d of the charge lever 8, and rotates the lever 8 clockwise about the shaft 8a against the urging force of the spring 9.

When the charge lever 8 rotates clockwise, the control end
The rotation control of the swing lever 3 in the counterclockwise direction by the spring 4 performed by the contact between the pin 8c and the pin 3c is released. As a result, the swing lever 3 is deflected by the urging force of the spring 4. Rotating clockwise, the swing gear 2 provided on the shaft 3a of the lever 3 meshes with the charge gear 6. At this time, the control end 8b of the charge lever 8 comes into contact with the moved charge member 11.

FIG. 2 shows the state at this time, and as is apparent from the drawing, the charging member 11 moves from the charge completion position shown by the broken line based on the shutter operation to the charge release position shown by the solid line. By moving, release lever 12,
By rotating the charge lever 8 and the swing lever 3 in the counterclockwise, clockwise, and counterclockwise directions, respectively, the swing gear 2 meshes with the charge gear 6. At this time, in this embodiment, the cam pins 8e on the back surface of the charge lever 8 are configured to be separated from the cam surface of the charge cam 7.

Here, when a motor (not shown) is driven for film winding, the driving force is transmitted to the drive gear 1, and the gear 1 rotates counterclockwise.

The rotation of the gear 1 is transmitted to the charge gear 6 through the meshing swing gear 2, and rotates the gear 6 in a counterclockwise direction.

When the charge gear 6 rotates in the counterclockwise direction, the charge cam 7 also rotates in the same direction, and the cam surface that gradually increases from the small diameter portion to the large diameter portion is supplied to the cam pin 8e of the charge lever 8. The lever 8 rotates clockwise around the shaft 8a against the urging force of the spring 9.

The rotation of the charge lever 8 pushes the charge member 11 which has been in contact with the control end 8b in the charge release state, and the charge member 11 is moved to the charge release position with the clockwise rotation of the charge lever 8. Will move toward the charge completion position.

FIG. 3 shows a state in which the maximum diameter portion of the charge cam 7 is supplied to the cam pin 8e of the charge lever 8 by the rotation of the charge gear 6, and as is clear from this drawing, the charge member 11 is The control end portion 8b of the charge lever 8 is moved to the charge completion position, and the charge completion state is set, as shown in FIG. Further, since the release lever 12 is not pressed by the charging member 11 due to the above movement, it is rotated clockwise by the urging force of the spring 13, and its control end 12c
Is in contact with the pin 15.

When the charge gear 6 further rotates in the counterclockwise direction from the state shown in FIG. 3, the cam surface supplied to the cam pin 8e of the charge lever 8 of the charge cam 7 has a minimum diameter portion. Rotates counterclockwise around the axis 8a.

When the charge lever 8 rotates as described above, its control end 8c abuts and presses the pin 3c on the swing lever 3,
The swing lever 3 is rotated clockwise about the shaft 3a against the urging force of the spring 4.

When the swing lever 3 rotates clockwise, the lever 3
The swing gear 2, which is rotatably supported by the gear, also moves in the same direction, and the meshing state with the charge gear 6 up to that point is released. As a result, the driving gear to the charge gear 6 is released.
1, the transmission of the driving force via the swing gear 2 is cut off, and the charge gear 6 stops rotating.

That is, when viewed from a motor (not shown) after the rotation of the swing lever 3, the configuration after the charge gear 6 cannot be a load unlike the drive gear 1 that rotates until the rotation of the motor stops.

Thereafter, when a predetermined film winding operation, for example, one frame winding, is completed, the rotation of the motor (not shown) is stopped, and the rotations of the drive gear 1 and the swing gear 2 are also stopped.

Through the above operation, the apparatus of the present embodiment returns to the shutter charge completed state shown in FIG. 1, and waits for the next charge release operation.

In other words, in this embodiment, the charge member 11 is moved from the charge release position to the charge completion position by one rotation of the charge gear 6 to set the shutter charge completion state, and the drive to the charge gear 6 is performed simultaneously with the completion of the charge. The transmission of the force is interrupted, and the transmission of the driving force is permitted by releasing the charge.

For this reason, the gear ratio of the oscillating gear 2 and the like should be set so that one rotation of the charge gear 6 can be sufficiently performed with the minimum required number of rotations of the drive gear 1 required to wind one frame of the film. For example, the shutter charging operation is reliably performed, and the driving force of the motor is not used for driving the charging system such as the charging gear 6 and the charging lever 8 after the charging is completed.

Regarding the winding operation of the film leader,
If the above operation is started by the shutter release operation, the above-described shutter charging operation is performed at the time of the first winding operation of the first frame, and in the subsequent winding operation of the leader section, the swing gear 2 is not engaged with the charging gear 6. It is clear that the operation is performed in the state, that is, the charging system becomes the load of the motor only in the first frame.

Effects of the Invention As described above, the shutter charging device according to the present invention includes a motor that is also a film feeding motor serving as a driving source of the charging operation and a charging gear 6 having a charging cam 7 in the illustrated embodiment for performing the charging operation. In a driving force transmission system including a charge lever 8 and a charging system, a swinging gear 2 supported by a rotatable swinging lever 3 is provided. In the illustrated embodiment, a release lever 12 and a charge lever shared with the charge system are provided. By the control mechanism including the control ends 8c, 8d of 8 and the swing lever 3, the driving force can be transmitted to the charging system for the first time by releasing the charge, and the transmission of the driving force to the charging system is interrupted after the charging is completed. Therefore, there is no need to associate the film winding operation with the shutter charging operation using a friction mechanism, and the load on the motor during the charging operation is eliminated. Becomes a mere driving load of the charge system, therefore, it will have an effect of reducing the load of the charge operation as viewed from the motor.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part showing an embodiment of a shutter charging device for a camera according to the present invention, and FIGS. 2 and 3 are operations for explaining an operation state of the embodiment shown in FIG. It is a state diagram. 1 ... drive gear, 2 ... swing gear, 3 ... swing lever,
4, 9, 13 ... spring, 5, 10, 14, 15 ... pin, 6 ... charge gear, 7 ... charge cam, 8 ... charge lever, 11
…… Charging member, 12 …… Release lever.

Claims (1)

(57) [Claims] A charging member for performing shutter charging by moving from a charge release position to a charge completion position; and a first control end that abuts when the charge member is at the charge release position, and rotates in a predetermined direction. The charging lever moves in the direction opposite to the urging direction to move the charging member in the direction of the charging completion position, and the cam lever provided in the charging lever contacts the cam lever provided in the charging lever. A charge cam having a cam surface for rotating the charge lever in a predetermined direction against the urging thereof and for rotating the charge lever in a predetermined direction according to the urging when the charging member moves to the charging completion position; From the charge release position of the charge member to the charge completion position. A charge system for causing movement between a first position for causing the movement of the charging completion position driving force of the internal motor from the charge release position to the charge member is transmitted to the charge system by the charge gear meshing,
An oscillating gear that is moved between a second position where the transmission of the driving force of the built-in motor to the charging system is interrupted without engaging with the charge gear; The swing gear is biased so as to rotate in the direction of moving to the first position, and the swing gear is moved to the first position by rotating according to the bias, and is rotated to the second position by rotating against the bias. A rocking lever to move to a position,
It has an end portion that can rotate and abut the charging member, and is normally urged so that the one end portion is located at a position where it can abut the charging member in the process of moving from the charge completion position to the charge release position. A release lever for detecting movement of the charge member to the charge release position by rotating against the bias when the charge member moves to the charge release position, and a swing lever provided integrally with the charge lever. When the charging member comes into contact with the charging member and moves to the charge completion position, the charging lever is rotated in a predetermined direction in accordance with the bias of the charging lever, so that the swing lever is rotated in a direction opposite to the bias to rotate the swing gear. A second control end positioned at the second position, and a second control end provided integrally with the charge lever and in contact with the other end of the release lever; By rotating the charge lever in a direction opposite to the bias by the rotation in the direction opposite to the bias of the release lever when the lever is moved, the control of the swing lever by the second control end is controlled. And a third control end for releasing the pivot lever in a direction according to the bias thereof to position the pivot gear in the first position. Shutter charging device.