KR0174488B1 - Method and apparatus for operating the electronic shutter of a camera - Google Patents

Abstract

A method for shortening the focusing time by performing automatic focusing of a focusing lens in both directions is provided in a shutter system of a camera including a focal point adjusting lens for focusing, focusing on the focusing lens with respect to the set longest subject. Setting an initial position of the focusing lens at a point between the focusing position of the focusing lens with respect to the position and the set nearest distance subject and the focusing position of the focusing lens with respect to the set nearest distance subject, and operating a shutter switch; In this case, in order to move the focus adjusting lens to the focusing position set in accordance with the calculation value calculated by the distance measuring circuit unit, rotating the focusing ring linked to the driving means in one direction or the opposite direction to perform the focus adjustment, Focusing of the focusing lens is completed. When the exposure control ring is rotated by the driving means in the same direction as the focus control ring and the focus control ring is stopped at the position of unlocking the sector opening and closing means, the sector opening and closing means operates to calculate the Performing exposure by the exposure value.

Description

Method of driving an electronic shutter of a camera and a driving device of the electronic shutter

1 is a plan view of an electronic shutter driving apparatus according to the present invention.

2 is an exploded perspective view of the electronic shutter driving apparatus according to the present invention.

3 is a side cross-sectional view of the electronic shutter driving apparatus according to the present invention.

4 is a plan view of a focusing cam applied to the electronic shutter driving apparatus according to the present invention.

5 is a diagram showing an exposure diagram of the electronic shutter driving apparatus of the present invention according to a time change.

6 is a side sectional view showing a positional relationship between a focusing ring and an exposure control ring and a magnet according to the present invention;

7 is a view showing a positional relationship between a sector and a sector open lever according to the present invention.

8 is a state diagram when the drive of the electronic shutter according to the present invention opens a sector.

9 is a view for explaining the electronic shutter driving method according to the present invention.

A), b), c), and d) are diagrams for explaining a driving state of a stepped steady-state control method motor used for driving the electronic shutter of the present invention.

11 is a view for explaining the electronic shutter drive control method according to the present invention, a flow chart in the case of normal exposure.

12 is a view for explaining the electronic shutter drive control method according to the present invention, in the case of bulb exposure flow chart.

13 is a view for explaining the electronic shutter driving method according to the present invention, a view for explaining the general exposure when the exposure adjustment ring is rotated in the clockwise direction.

14 is a view for explaining the electronic shutter driving method according to the present invention, a view for explaining the general exposure when the exposure adjustment ring rotates in the counterclockwise direction.

FIG. 15 is a view for explaining an electronic shutter driving method according to the present invention, and for explaining bulb exposure when the exposure adjustment ring rotates clockwise.

FIG. 16 is a view for explaining the electronic shutter driving method according to the present invention, which illustrates bulb exposure when the exposure adjustment ring rotates in a counterclockwise direction.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving an electronic shutter of a camera and a driving device of an electronic shutter, and more particularly, an electronic shortening of a time required for focusing by shortening a moving distance of a focusing lens that is moved according to a distance from a subject. A method of driving a shutter and a driving device thereof.

The camera employing the electronic shutter performs autofocusing to move the focusing lens to a position measured relative to an arbitrary distance of the subject, and autoexposure adjustment to control the aperture size of the aperture according to the brightness of the subject. Have a system.

Techniques for a camera employing such an electronic shutter have been proposed in US Pat. Nos. 4,918,480, 4,634,254, 5,111,230, and Japanese Patent Laid-Open No. 61-9632.

These prior arts focus on a focusing ring that measures the distance to the subject and moves the focusing lens according to the distance, and a locking mechanism that stops rotation of the focusing ring when the focusing lens is moved to the focusing position. It is included.

In addition, the sector opening and closing means for opening and closing the sector according to the brightness of the subject, the exposure control ring for operating the sector opening and closing means to the set position, and the focus control ring and the exposure control ring described above when the automatic exposure is completed to the initial position. An initial in-situ return mechanism for returning, and a power source for actuating the focus adjustment ring, exposure adjustment ring and locking mechanism described above.

In this regard, a camera employing a conventional electronic shutter has a structurally complex system.

In addition, the camera applying the electronic shutter is a method of moving the focus adjusting lens, because the focus adjusting ring is a method of feeding the focus adjusting lens from the minimum feeding position to the maximum feeding position and vice versa. There is a disadvantage that the feeding time of the lens is longer than necessary.

In particular, a camera using a conventional electronic shutter tends to multi-stage the focusing step between the minimum focusing position and the maximum focusing position of the focusing lens to reinforce the focusing function on the subject. Since the focus adjustment is performed only by rotating from the initial position to an arbitrary position, the focus adjustment time is long in proportion to the number of stages.

The present invention is invented to solve the problems of the prior art as described above, the object of the present invention is to shorten the moving distance of the focusing lens to shorten the focusing time to improve the operation response of the electronic shutter An electronic shutter driving method of a camera is provided.

It is another object of the present invention to provide an electronic shutter driving apparatus of a camera which can simplify the structure of the system while realizing the above object.

In order to realize the objects of the present invention as described above, in a shutter system of a camera including a focusing lens for focusing, the focusing lens of the focusing lens relative to the set longest subject and the closest subject Setting an initial position of the focusing lens at a point between the focus positions of the focusing lens, and when the shutter switch is operated, moving the focusing lens to a confocal position set according to an operation value calculated by a ranging circuit unit In order to adjust the focus, the focus adjustment ring linked to the driving means is rotated in one direction or the opposite direction to perform focus adjustment, and when the focus adjustment of the focus adjusting lens is completed, the driving means is driven in the same direction as the focus adjustment ring. The rotating exposure adjustment ring is unlocked by the sector opening and closing means. The electronic shutter driving method of the camera having the step of performing the exposure by the exposure value calculated in the photometric circuit part by operating the sector opening and closing means by stopping with the focusing ring at the light.

The present invention also provides an electronic shutter driving method of a camera in which a focus adjusting lens moves to a focus position in association with a focus adjusting ring, and a sector is opened and closed in conjunction with an exposure adjusting ring. The focus adjusting lens at a midpoint between the focus position of the focus adjusting lens for the set longest subject and the focus position of the focus adjusting lens for the set closest subject so as to be located at an intermediate end of the entire step of the focus adjusting position; In the state of arranging, setting the initial position of the focusing ring for driving the focusing lens, and connecting the focusing ring and the exposure control ring to rotate in the same direction by a drive means, sector opening and closing means The exposure when the direction of rotation of the drive means is reversed so that it can be operated. Allowing the focusing ring to be rotated after one step rotation of the cutting ring is preceded, and in order to perform focusing by moving the focusing lens to a position calculated by the distance measuring circuit unit when the shutter switch is operated. Rotating the focusing ring in one direction or the opposite direction to adjust the focusing position while moving the focusing lens in the sector or the subject toward the stage, and in the state where the focusing is performed, an appropriate value according to the exposure value incident from the subject. A recess and a convex part are alternately formed around the circumference of the exposure adjusting ring so that the exposure can be made, and the convex part has an exposure adjusting ring having a protruding end for locking the sector cloth lever. Positioned to be positioned to effect exposure, and by the protruding end of the When the closing cloth lever is locked, the exposure control ring is rotated one step in the opposite direction with the focusing ring stopped, and in that state, the exposure control ring is stopped together with the focusing ring to the exposure value calculated by the photometric circuit unit. And performing exposure by adjusting the opening / closing time of the sector by controlling the on / off time of the magnet by rotating the sector cloth lever, and rotating the exposure adjusting ring in which the exposure is performed by one step clockwise. And restoring the focus adjustment ring and the exposure adjustment ring to initialize the system by engaging the projection end and closing the sector.

The technical means for enabling the method include a driving means including a power source and transmitting the rotational force, and engaged with the driving means to rotate in the same direction as the power source, and after stopping for one step when the rotation direction of the power source is reversed. And a focus adjustment ring for feeding the focus adjusting lens by the calculated value calculated by the distance measuring circuit unit by the rotational force, an exposure adjustment ring engaged with the driving means and rotating in the same direction as the power source, and the focus and exposure adjustment ring. The locking is released by stopping all of the rotation operation of the, the sector opening and closing means for opening and closing the sector by the exposure value calculated in the photometric circuit portion, and a magnet for controlling the opening time of the sector to adjust the opening and closing time of the sector An electronic shutter driving device of a camera is provided.

In another aspect, the present invention is the electronic shutter drive of the camera in which the lens is moved to the focus position in conjunction with the focus adjustment ring, the opening and closing of the sector is carried out in conjunction with the exposure adjustment ring, the power source is engaged with the power source to transmit the rotational force, Decelerating means which rotates after stopping for one step and rotates in the same direction as the power source when the gear is rotated in the same direction as the power source when the rotation direction is reversed, and extracts the focusing lens by the calculated value calculated by the ranging circuit unit by the rotational force. A focus adjustment ring, an exposure control ring which is interposed between the power source and a gear, and which rotates in the same direction as the power source, and the sector of the sector as the rotation operation of the exposure control ring stops together with the focus control ring. The locking is released by the sector open lever for opening and the exposure adjustment ring, and the exposure value calculated by the photometric circuit unit is applied. As to the power-off of the exposure control magnet, it provides an electronic shutter drive device for a camera comprising a sector Claus lever for closing the sector.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

1 is an assembled state plan view of an electronic shutter driving apparatus of a camera according to the present invention, FIG. 2 is an exploded perspective view of an electronic shutter driving apparatus of a camera according to the present invention, and FIG. 3 is an electronic shutter driving apparatus of a camera according to the present invention. 4 is a plan view of a focusing cam according to the present invention, and reference numeral 2 of FIG. 3 denotes a shutter base.

The lens barrel 4 is located inside the shutter base 2, which is positioned inside the focusing cam barrel 6, and the amount of rotation of the focusing cam barrel 6 and It is comprised so that feeding may be made to the axial direction of this cam barrel according to a rotation direction.

Such lens feeding can usually be realized by following the cam curve and moving to the lens barrel. The focusing cam barrel 6 of the present embodiment has a cam portion 8 on its inner side.

The cam portion 8 includes a horizontal portion 10 corresponding to an initial position, a first cam portion 12 extending forward from the horizontal portion along the inner surface of the focusing cam barrel 6, and from the horizontal portion. The second cam portion 14 extends backward along the inner side of the focusing cam barrel 6.

The focusing cam barrel 6 has a fork 16 formed on one side thereof, and the fork 16 rotates the rotational force of the focusing ring 18 which is rotatably installed on the outer circumferential surface of the shutter base 2. It is provided as a means for receiving.

The focusing ring 18 has a pin 20 coupled to the fork 16, and teeth 22 are formed on the outer circumferential surface over approximately one half of the focusing ring. The protrusion 23 which protrudes outward from the outer peripheral surface is hold | maintained.

The tooth 22 is configured to receive the rotational force of the stepping motor M by the final gear of the reduction gear 24 is toothed.

The deceleration part 24 receives the rotational force from a single power source and divides the rotational force for focusing and the rotational force for exposure control, and transmits the rotational force to the focusing ring 18 and the exposure control ring 28, respectively. Configure the gear train.

Therefore, the reduction unit 24 has a reduction gear 30 for exposure control, and a plurality of reduction gears 32a, 32b, 32c, 32d, and 32e for focus adjustment, and the motor gear 34. Are gears coupled to the reduction gear 30 and the lower gear 32a-2 as second gears, respectively.

According to the arrangement of the gears, the tooth 22 is geared with the reduction gear 32e, which is the final gear of the reduction unit, to receive the rotational force.

Among the reduction gears described above, the first reduction gear 32a includes a shaft in which the upper gear 32a-1 and the lower gear 32a-2 are integrally formed in the shutter base 2 as shown in FIG. In the (S) spaced up and down is installed rotatably.

The shaft S has a configuration in which a stage is formed so that the upper and lower gears 32a-1 and 32a-2 rotate in a predetermined interval.

The lower gear 32a-2 has a parallax protrusion 36 and 38 formed at an angle corresponding to one step, and the upper gear 32a-1 has a slide located between the parallax protrusions. The projection 40 is formed.

The parallax protrusions 36 and 38 and the slide protrusion 40 may be formed on the upper gear 32a-1 and the lower gear 32a-2.

The upper gear 32a-1 of the reduction gear 32a is disposed to transmit power by gear coupling with another reduction gear 32b adjacent thereto, and the lower gear 23a-2 is connected to the motor gear 34. Tooth bite has a configuration that can receive the rotational force of the stepping motor.

The exposure control ring 28 is formed with a plurality of projections (29, 31, 33 ....) on the circumferential surface, these projections are arranged at intervals of 22.5 degrees, one over the other than these projections A further end 35 is provided which protrudes outward.

Meanwhile, the exposure control ring 28 is rotatably positioned on the shutter base 2 in the concentric circle with the focus control ring 18, and the sector opening and closing means are provided at the periphery of the focus control ring and the exposure control ring to provide a sector. It is configured to open and close the.

In the sector opening and closing means according to the present embodiment, the sector cloth lever 46 and the sector open lever 48 are respectively rotatably coupled through the pins 50 and 52 of the shutter base 2, respectively, the elastic members 54. 56 is installed in the state receiving a rotational force in the clockwise direction as shown in the drawing.

This action is made possible by one end of the elastic members 54 and 56 being locked to the shutter base 2 and the other end to the sector cloth lever 46 and the sector open lever 48, respectively.

One side of the sector open lever 48 is provided with a governor means to control the exposure. The governor means of the present embodiment is integrally formed at one end of the lever 48 with the worm gear 58. And a worm wheel 60 in which the worm gear is toothed, a governor gear 62 installed on the same shaft as the worm wheel and rotating together, and an anchor 64 which is caught by the governor gear.

The worm wheel 60, the governor gear 62, and the anchor 64 are rotatably coupled to the shutter base 2.

As shown in FIG. 7, the other side of the sector open lever 48 is connected to a pair of sectors S1 and S2 by a pin 66 to open a sector.

The sector cloth lever 46 is restrained or released from the restraint by the magnet 68 which is the exposure driving source. The lever 46 is restrained when power is applied to the magnet and is released from restraint when power is not applied. .

This action is possible by providing a sector cloth pin 70 to the sector cloth lever 46 so as to place this pin 70 in the groove 74 of the restraining member 72 where the pin is advanced back and forth by the magnet 68. Done.

In the present embodiment, the step motor M, which is used as a driving source for driving the motor gear 34 in the energetic direction, is divided into four parts (90 degrees-180 degrees-270 degrees-360 degrees) and magnetized rotor R is built-in. (See Figure 10)

Such a step motor continuously supplies power for at least 20 ms for magnetic stability before turning off the power, thereby preventing an unstable state when the power is turned off.

The electronic shutter driving apparatus of the present invention thus formed performs auto focus adjustment of the lens in the driving sequence as shown in FIG.

In other words, the initial position (a) of the focusing lens is set at the intermediate end between the most recent feeding position (b) and the most recent feeding position (c), and then the calculated value of the distance measuring circuit is measured for any distance of the subject. As much as the focus adjustment lens is driven by the drive means.

Here, the initial position (a) of the focusing lens is assumed that the entire stage of the auto focus adjustment is 40 stages, the middle stage is 20 stages, and the most recent feeding position (c) and the most recent feeding position (b) 40 stages and 1 stage, respectively.

The initial position (a) of the lens is set as the cam follower (F) of the lens barrel (4) is positioned in the horizontal portion (10) from the cam portion (8) of the focusing cam barrel (6), or by the present applicant It can be set to the focusing ring control method disclosed in the proposed Republic of Korea Patent Application No. 95-33888.

With such a stage, auto focusing can shorten the focusing time by setting the initial position (a) as the starting point of auto focusing and driving the focusing ring linked to the lens clockwise or counterclockwise. There will be described auto focusing and auto exposure according to the embodiment below.

When the ranging and metering are completed in a conventional manner and the shutter starts to operate, first, power is applied to the magnet 68 and the restraining member 72 is attracted by the magnetic force of the magnet 68, so that the groove 74 of this member The sector cloth lever 46 located at is constrained by the sector cloth pin 70.

In this state, if the step motor continues to rotate, the sector open lever 48 is out of the projection 23 of the focusing ring 18. By this action, the sector open lever 48 is elastic member 56. The rotational force is received in the clockwise direction by the elastic force of the drawing.

The clockwise rotational force transmitted to the sector open lever 48 is transmitted to the worm gear 58 of the governor means to rotate the worm wheel 60, so that the governor gear 62 rotates together to the anchor 64. Is done as soon as possible.

That is, the worm gear 62, which receives the rotational force from the sector open lever 48 via the worm wheel 60, is about to rotate, but both ends of the anchor 64 are alternately engaged with the governor gear 62. As a result, the rotation is resisted.

Therefore, the rotational speed of the sector open lever 48 is slower than the rotational speed of the exposure adjustment ring 28 to show the exposure diagram as shown in FIG.

At this time, the step motor is rotated by 90 degrees as shown in FIG. 10. By this rotation, the focus adjustment ring 18 is rotated by a predetermined angle, and the exposure adjustment ring 28 is pitched by 1 pitch (22.5 degrees). Will rotate.

However, the sector open lever 48 has a time out of the projection 23 of the focusing ring 18. During this time, since the focusing should not be performed, in this embodiment, the cam portion of the focusing cam barrel 6 The horizontal portion 10 is provided at (8) to prevent focus adjustment during that time.

Hereinafter, the exposure method according to the rotational direction of the step motor will be described with reference to FIGS. 11 to 16 by dividing the general exposure and the bulb exposure.

[Operation immediately after the sector open lever 48 is out of the projection 23 of the focusing ring 18]

1) In case of normal exposure (when the stepping motor rotates four steps when the focusing ring and the exposure adjustment ring rotate clockwise), the driving direction of the stepping motor M at the initial position (step 100) is clockwise. In step 120, it is determined whether the driving step of the stepping motor is even or odd in the step 120. In this case, the driving direction of the stepping motor is clockwise and the number of steps is even from step 130.

The initial position starts at the position where the parallax protrusion 36 of the lower gear 32a-2 of the reduction gear 32a is in contact with the slide protrusion 40 of the upper gear 32a-1.

Since the parallax protrusion 36 and the slide protrusion 40 are in contact with each other, the rotational force of the stepping motor is transmitted to the focus adjustment ring 18 as it is, and the focus adjustment ring is rotated by four steps.

At this time, the exposure control ring 28 linked to the exposure reduction gear 30 is moved by 4 steps by receiving power in a clockwise direction.

While the focus adjustment is performed by the power of the stepping motor M, the sector open lever 48 receives a force to rotate clockwise about the pin 52, but the anchor 64 is connected to the governor gear 62. Since the engagement adjustment ring 28 restricts the rotation of the sector open lever 48 by the projection adjustment rings 28 before the sector open lever is rotated to the open position because of the engagement, the sector open lever is in focus adjustment time. While it prevents the sector from opening by interfering with the rotation.

This is made possible by limiting the movement of the sector open lever to the open position because the angular velocity of the exposure adjustment ring 28 is greater than the angular velocity of the sector open lever 48.

When the focus adjustment is completed during this operation, the sector cloth lever 46 is in contact with the end 35 of the exposure adjustment ring 28 and thus cannot be rotated, but the stepping motor M is Exposure can be controlled by rotating one step counterclockwise (step 150).

That is, while the stepping motor M rotates one step in the counterclockwise direction, the lower gear 32a-2 is rotated one step in the clockwise direction so that the exposure adjusting ring 28 is set to 1 while the focus steering ring 18 does not rotate. Step is rotated counterclockwise to release the restraint of the sector cloth lever 46.

At this time, since the magnet 68 sucks the sector cloth lever 46 by magnetic force, the cloth lever remains as it is, but the sector open lever 48 rotates to the open position by the elastic force of the elastic member 56 to open the sector. When the exposure is completed, the magnet 68 for adjusting the exposure is turned off and the sector cloth lever 46 is rotated by the elastic force of the elastic member 54 to close the sector.

In this state, the changed position of each part is initially adjusted by the stepping motor M to adjust the focus by rotating the lower gear 32a-2 counterclockwise (4 steps) by the amount first measured. In order to rotate one step clockwise, three steps are rotated counterclockwise as a result, and the slide projection 40 of the reduction gear moves from the initial left to the right.

That is, the focusing ring 18 is rotated by four steps in the clockwise direction by the stepping motor M, and the parallax projection (1) even if the lower gear 32a-2 rotates one step clockwise for exposure. 38) and the slide projection 40 is in a state that is not rotated.

Since the exposure adjustment ring 28 is rotated four steps in the clockwise direction and then rotated one step in the counterclockwise direction for exposure, the exposure adjustment ring 28 is the result of being rotated three steps in the clockwise direction.

After exposure in this state, the CPU (not shown) issues an initialization command to initialize the shutter.

Then, the stepping motor is rotated one step clockwise to rotate the sector cloth lever 46 counterclockwise to free the rotation of the exposure adjustment ring 28. (Step 160).

At this time, since the parallax projection 38 of the lower gear 32a-2 and the slide projection 40 of the upper gear 32a-1 are in contact with each other, the focus adjustment ring 18 does not rotate, but the exposure adjustment ring 28 Is rotated one step clockwise, so that the focusing ring 18 and the exposure adjustment ring 28 are rotated four steps in the clockwise direction at the initial position.

In this state, while the magnet 68 connected to the sector cloth lever 46 is turned on (step 170), the step adjustment motor returns the focusing ring 18 to the initial position while rotating the counterclockwise by 5 steps. In order to return the exposure adjustment ring 28 which is one step over-run in the clockwise direction to the initial position, it is rotated one step clockwise to return the initial position of the exposure adjustment ring 28 and the time difference projection 36 and the slide protrusion 40. The mechanical initialization is completed by touching.

When the mechanical initialization is completed (step 180) and the magnet 68 is turned off (step 190), the control operation is completed (step 200).

2) For normal exposure (when the stepping motor rotates 7 steps when the focusing ring and the adjustment ring rotate clockwise).

The reduction gear 3a rotates 7 steps in the counterclockwise direction (step 130-1). In this case, the focus control ring 18 and the exposure control ring 28 rotate in the same manner, and the sector cloth lever ( 46 is not constrained to the exposure adjustment ring 28, since the magnet 68 restrains the sector cloth lever 46 so that the sector cloth lever does not operate at all.

Therefore, the sector remains open. When the exposure is completed, the magnet 68 is turned off to close the sector.

Initializing the post-exposure sector is as follows.

When the initialization command is issued from the CPU as in the case described above, in order to freely rotate the exposure control ring 28 by rotating the sector cloth lever 46 counterclockwise, the stepping motor M is rotated in the clockwise direction. The step will rotate.

At this time, since the parallax protrusion 36 formed in the lower gear 32a-2 of the reduction gear 32a and the slide protrusion 40 formed in the upper gear 32a-1 are in contact with each other, the focusing ring 18 and the exposure adjustment 18 are controlled. The ring 28 is rotated one step clockwise, so that the focusing ring 18 and the exposure adjustment ring 28 are rotated eight steps clockwise when viewed from the initial position.

At this time, when the magnet 68 restraining the sector cloth lever 46 is turned on, when the stepping motor M rotates to rotate the lower gear 32a-2 clockwise 9 steps, the focusing ring 18 is initialized. Although the exposure adjustment ring 28 is rotated one step further, the step adjustment motor is rotated one step in the opposite direction to return the exposure adjustment ring to the initial position and at the same time, the parallax projection 36 and the slide projection 40 ) To complete the initialization and turn off the magnet.

3) For normal exposure (when the stepper motor rotates 4 steps when the focusing ring and exposure control ring rotate counterclockwise).

In this case, step 125 is performed in step 110. In step 125, it is determined whether the driving of the stepping motor M is an even step or an odd step.

If it is an even step, in step 135 the stepping motor M rotates in an even step.

In this case, since the parallax protrusion 36 provided in the reduction gear 32a and the slide protrusion 40 are in contact with each other, the rotational force is transmitted to the focus adjustment ring 18 one step later so that the focus adjustment ring 18 is counterclockwise. Rotate by 3 steps.

At this time, the exposure adjustment ring 28 that is linked to the reduction gear 30 is transmitted to the power in the clockwise direction as it is to rotate four steps.

When the lower gear 32a-2 is rotated one step in the counterclockwise direction in order to perform exposure in such a state, the slide projection 40 of the upper gear 32a-1 is the parallax protrusion of the lower gear 32a-2. The focus adjustment ring 18 is not rotated because it comes into contact with 36, and only the exposure adjustment ring 28 is rotated one step clockwise, thereby creating a state in which the sector can be opened.

At this time, since the magnet 68 is controlled to the on state, the sector cloth lever 46 is restrained and does not act. The sector open lever 48 rotates by the elastic force of the elastic member 56 to open the sector. do.

After the exposure is finished, the magnet 68 is controlled to the off state, causing the sector cloth lever 46 to rotate to the closed position by the elastic force of the elastic member 54.

At the end of the exposure, the initialization starts by rotating the sector closing lever 46 counterclockwise to rotate the stepping motor M one step clockwise to free the rotation of the exposure adjustment ring 28. do.

At this time, since the parallax projection 36 of the lower gear 32a-2 and the slide projection 40 of the upper gear 32a-1 are in contact with each other, the focus adjustment ring 18 and the exposure adjustment ring 28 are clockwise 1. Step rotation is carried out, and it is in the state which rotates two steps counterclockwise from an initial position, respectively.

In this state, while controlling the magnet 68 to ON, by rotating the stepping motor for initialization by rotating the lower gear 32a-2 two steps counterclockwise, the focus adjustment ring 18 and the exposure adjustment ring 28 Becomes the initial position at the same time, and the initialization is completed by the parallax projection 36 and the slide projection 40 contacting, and the magnet 68 is turned off.

4) For normal exposure (when the stepping motor rotates 7 steps when the focusing ring and exposure control ring rotate counterclockwise).

In this case, in step 125, the step 135-1 of driving the stepping motor M by 7 steps starts.

In this case, since the parallax protrusion 36 and the slide protrusion 40 of the reduction gear 32a contact each other, the focus adjustment ring 18 rotates one step later, and the focus adjustment ring 18 is counterclockwise. Rotates by 6 steps.

Then, the slide protrusion 40 of the upper gear 32a-1 comes into contact with the parallax protrusion 38 of the lower gear 32a-2, and the sector cloth lever 46 is rotated.

At this time, since the magnet 68 restrains the sector cloth lever 46, the lever has no action, and the sector open lever 48 opens the sector while rotating by the elastic force of the elastic member 56.

After the exposure is completed, the sector cloth lever 46 is released from restraint by closing control of the magnet 68 to close the sector by the elastic force of the elastic member 54.

At the end of the exposure, the initialization starts by turning the stepping motor M one step clockwise to rotate the sector cloth lever 46 counterclockwise to free the rotation of the exposure adjustment ring 28. do.

That is, the parallax projection 36 is performed by the stepping motor M rotating one step in a state where the parallax protrusion 38 of the lower gear 32a-2 and the parallax protrusion 40 of the upper gear 32a-1 are in contact with each other. ) And the slide protrusion 40 come into contact with each other, and only the exposure adjustment ring 28 is rotated one step clockwise, and the focus adjustment ring 18 and the exposure adjustment ring 28 are six steps counterclockwise. The result is a rotation.

At this time, as the magnet 68 is controlled to be on, the stepping motor M is rotated 6 steps in the clockwise direction so that the focusing ring 18 and the exposure adjustment ring 28 return to their initial positions, and initialization is completed. ) Is controlled to be off.

5) For bulb exposures (when the stepping motor rotates 4 steps when the focusing ring and exposure control ring rotate clockwise).

Bulb exposure cannot maintain the on state of the magnet 68, which regulates the sector opening time, unlike normal exposure, so that the sector cloth lever 46 is engaged at the end 35 provided in the exposure adjustment ring 28. In this state, the magnet is controlled off to be exposed after the bulb time and initialized, which will be described with reference to FIGS. 12 and 15 and 16.

At the start, the initial position is in contact with the parallax projection 36 provided on the lower gear 32a-2 of the reduction gear 32a and the slide projection 40 provided on the upper gear 32a-1 in the same manner as the normal exposure. (Step 210)

If it is determined in step 220 whether the driving direction of the stepping motor M is clockwise or counterclockwise, and in the clockwise direction, it is determined in step 230 whether the driving step of the stepping motor is even.

In this case, since the stepping motor rotates four steps, if the stepping motor is driven four steps clockwise in step 240, the parallax protrusion 36 and the slide protrusion 40 are in contact with each other, and thus the focusing ring 18 is rotated by the stepping motor step amount.

At this time, since the exposure adjustment ring 28 receives the rotational force through the reduction gear 30, the exposure adjustment ring 28 is in a state of rotating four steps in the clockwise direction.

When the focus adjustment is made by this action, as in step 250, the magnet 68 is controlled off in order to maintain the sector opening for the bulb time set in advance.

By this control, the sector open lever 48 rotates to open the sector, and in this state, the magnet 68 is controlled to the on state after a certain bulb time passes.

At this time, when the bulb exposure is completed to close the sector, if the stepping motor M is rotated one step counterclockwise (step 260), the sector cloth lever 46 is released from the end 35 of the exposure adjustment ring 28. In this state, when the magnet 68 is controlled to the OFF state (step 270), the sector is closed by the elastic force of the elastic member 54 of the sector cloth lever 46.

For initialization, the lower gear 32a-2 is rotated one step counterclockwise (step 280), and the magnet 68 is controlled to the on state (step 290).

Because of this action, the lower gear 32a-2 is the result of rotating the four steps counterclockwise, so that the four steps must be rotated clockwise for the initialization.

However, since it is in contact with the slide projection 40 of the upper gear (32a-1) and the parallax projection (36) of the lower gear (32a-2), when rotated four steps in the opposite direction, to drive the focusing ring (18) An error of one step occurs.

To compensate for this error, the lower gear 32a-2 is rotated 5 steps in the clockwise direction so that the focusing ring 18 is rotated 4 steps in the counterclockwise direction to the initial position, and then again the lower gear 32a-. 2) and when the lower gear 32a-2 is rotated one step counterclockwise to return the exposure adjustment ring 28 to the initial position, the parallax projection 36 and the slide projection 40 become the initial position. The exposure adjustment ring 28 is also returned to the initial position (step 300).

If the power applied to the magnet 68 is cut off in this state, the control of bulb exposure is completed (step 310).

6) For bulb exposure (when the stepping motor rotates 7 steps when the focusing ring and exposure control ring rotate clockwise).

In the initial state where the parallax projection 36 of the reduction gear 32a and the slide projection 40 contact each other at the start, when the stepping motor M rotates 7 steps clockwise (step 240-1), the lower gear 32a-2 rotates 7 steps counterclockwise, and the focusing ring 18 and the exposure adjusting ring 28 rotate 7 steps clockwise.

For bulb exposure, rotate the lower gear 32a-2 clockwise without rotating the focusing ring 18 so that the sector closing lever 46 can be engaged at the end 35 of the exposure adjustment ring 28. Rotate the step.

Then, the focus adjustment ring 18 does not rotate, and only the exposure adjustment ring 28 rotates one step in the counterclockwise direction so that the sector can be opened while the parallax protrusion 38 and the slide protrusion 40 come into contact with each other. do.

In this state, the magnet 68 is turned off to maintain the sector opening for the set bulb time, and the sector open lever 48 rotates clockwise to completely open the sector.

At this time, since the sector cloth lever 46 is latched on the end 35 of the exposure control ring 28 and has no action, the bulb exposure is performed in this state.

In this state, the exposure adjustment ring 28 is rotated one step further in the counterclockwise direction, resulting in the rotation of the six steps in the clockwise direction, and the initial position at which the parallax protrusion 36 and the slide protrusion 40 come into contact with each other. The parallax protrusion 38 and the slide protrusion 40 are brought into contact with each other.

After the bulb exposure time has elapsed, the magnet 68 is controlled to the on state. In order to close the sector in this state, the sector cloth lever 46 is exposed by rotating the lower gear 32a-2 by one step counterclockwise. When the magnet 68 is turned off and then off from the end 35 of the adjustment ring 28, the sector cloth lever 46 rotates to close the sector.

In this state, when the lower gear 32a-2 is rotated one step counterclockwise and the magnet 68 is turned on, the lower gear 32a-2 is seven steps counterclockwise for focus adjustment. One step in the clockwise direction to open the sector, one step in the counterclockwise direction to close the sector, and one step in the counterclockwise direction to turn the magnet on before re-initialization. Result.

In this state, for the initialization, the lower gear 32a-2 may be rotated 8 steps clockwise.

However, when the gear is rotated clockwise while the parallax protrusion 36 and the slide protrusion 40 of the reduction gear 32a are in contact with each other, an error of one step occurs to drive the focus adjustment ring 18. The lower gear 32a-2 is rotated 9 steps in the clockwise direction to the initial position in which the focus adjusting ring 18 is rotated 8 steps in the counterclockwise direction, and then the lower gear 32a-2 and the exposure adjusting ring ( When the lower gear 32a-2 is rotated one step counterclockwise to return 28 to the initial position (step 300), it moves to the initial position where the parallax protrusion 36 and the slide protrusion 40 contact each other. And the exposure adjustment ring 28 also becomes the initial position.

7) For bulb exposure (when the stepping motor moves 4 steps when the focusing ring and exposure control ring rotate counterclockwise).

In this case, starting from step 235 of determining whether the stem is even (four steps) while the stepping motor M rotates counterclockwise in step 220, the stepping motor drives four steps 245. The explanation starts from.

When the stepping motor M drives four steps counterclockwise, the clockwise four-step rotation of the lower gear 32a-2 that rotates in proportion to the stepping motor M causes the slide protrusion 40 of the upper gear 32a-1 to rotate. Since the drag is taken after one step, the focus adjustment ring 18 is rotated three steps in the counterclockwise direction.

Currently, the parallax protrusion 38 and the slide protrusion 40 are in contact with each other, and in this state, the magnet 68 is turned off to maintain the sector opening for the set bulb time, and the sector open lever 48 rotates clockwise. The sector is fully open and this state is maintained for bulb time.

With the magnet 68 controlled in the on state, the lower gear 32a-2 is rotated one step counterclockwise so that the end 35 of the exposure adjustment ring 28 held by the sector cloth lever 46 is closed. When the magnet 68 is turned off and the magnet 68 is turned off, the sector cloth lever 46 pushes the sector open lever 48 so that the sector is closed and bulb shooting is completed.

Initialization in this state begins by rotating the lower gear 32a-2 counterclockwise and then controlling the magnet 68 to the on state.

Under this control, the lower gear 32a-2 is rotated four steps in the clockwise direction, then rotates one step in the counterclockwise direction to close the sector, and rotates one step in the counterclockwise direction for initialization. When judged, the lower gear 32a-2 is rotated two steps clockwise.

Therefore, for initialization, the lower gear 32a-2 only needs to rotate two steps counterclockwise.

8) For bulb exposures (when the stepper motor rotates 7 steps when the focusing ring and exposure control ring rotate counterclockwise).

When the stepping motor M is driven at step 245-1 at step 235 in step 235, the parallax protrusion 36 of the reduction gear 32a and the slide protrusion 40 are in contact with each other. In the initial position, the focus adjustment ring 18 is rotated after one step, so the focus adjustment ring 18 is rotated six steps in the counterclockwise direction.

At this time, since the exposure adjustment ring 28 rotates 7 steps in the counterclockwise direction, the focus adjustment ring (28) can be engaged with the sector cloth lever 46 at the end 35 of the exposure adjustment ring 28 for the bulb exposure. 18) rotates the exposure adjustment ring 28 one step clockwise without rotating.

By this action, the lower gear 32a-2 rotates one step, and the parallax protrusion 38 comes into contact with the slide protrusion 40.

The magnet 68 is then turned off to maintain the sector opening for the bulb time set thereafter, and the sector open lever 48 rotates clockwise to fully open the sector.

After the bulb exposure for a certain period of time, the magnet 68 is controlled to the on state, and the lower gear 32a-2 is removed so that the sector cloth lever 46 can be released from the end 35 of the exposure adjustment ring 28. It rotates one step clockwise, and controls the magnet 68 to the off state again.

By this action, the sector cloth lever 46 rotates to close the sector, thereby ending the bulb exposure.

Initialization in this state starts by rotating the lower gear 32a-2 by one step in the counterclockwise direction, and then controlling the magnet 68 in the on state.

At this time, looking at the position change of the reduction gear 32a, the focus adjustment ring 18 and the exposure adjustment ring 28, the reduction gear 32a is seven steps clockwise to adjust the focus, and then maintains the sector in the bulb state. In order to rotate the device one step in the counterclockwise direction, one step in the clockwise direction to close the sector, and one step in the counterclockwise direction for initialization, it is rotated six steps in the counterclockwise direction when judged from the initial position.

The focus adjustment ring 18 is also rotated 6 steps counterclockwise by the reduction gear 32a described above, 0 steps at exposure time, 0 steps to close the sector, and 0 steps for initialization. It is rotated 6 steps.

The exposure adjustment ring 28 rotates 7 steps counterclockwise for focus adjustment, 1 step clockwise upon exposure, 1 step counterclockwise to close the sector, and 1 step clockwise for initialization. If judged by, it is rotated 6 steps counterclockwise.

At this time, since the parallax protrusion 36 and the slide protrusion 40 of the reduction gear 32a are in contact with each other, the stepping motor M is rotated 6 steps clockwise in order to return to the initial position. Is rotated 6 steps counterclockwise, the focus adjustment ring 18 and the exposure adjustment ring 28 is returned to the initial position and at the same time contact with the parallax projection 36 and the slide projection 40, thereby completing the initialization.

After that, the magnet 68 may be controlled to be in an off state.

In this embodiment, the step motor M rotates the four-divided rotor by changing the polarity of the steppers ST1, ST2, ST3, and ST4 as shown in FIG. 10 a) b) c) d). It is possible to prevent the unstable state when the power is turned off by supplying power continuously for about 20ms for the magnetic field stability before power off.

That is, the state is rotated 90 degrees from the initial position, and even if the power is turned off, the power is supplied for 20 ms before the power is turned off, thereby securing an electronic stability point.

Therefore, the electronic shutter driving apparatus according to the present embodiment can prevent the flow of the focusing ring without using the locking means used to prevent the flow of the focusing amount in the state where the conventional focusing is completed.

As described above, the electronic shutter driving apparatus according to the present invention uses only stable peaks by driving the step motors 90 degrees-180 degrees-270 degrees-360 degrees, so that an unstable electron when the power is turned off from the camera using the peaks. Due to the systematic stability point, the structural complexity of using the locking mechanism can be avoided.

In addition, the electronic shutter driving method according to the present invention can shorten the focusing time because the middle stage of the focusing can be moved to the initial position and can be moved in both directions.

Claims (19)

A shutter system of a camera comprising a focusing lens for focusing, wherein the focus is at a point between the focusing position of the focusing lens with respect to the set longest subject and the focusing position of the focusing lens with respect to the set nearest distance subject. Setting the initial position of the adjustment lens and, when the shutter switch is operated, move the focus adjustment ring linked to the driving means to move the focus adjustment lens to the focusing position set according to the calculation value calculated by the ranging circuit unit. Performing focus adjustment by rotating in one direction or the opposite direction, and exposure control ring which rotates in the same direction as the focus adjustment ring by the driving means when the focus adjustment of the focus adjusting lens is completed. Sector opening and closing as stopped with the focus ring in the released position The operation by an electronic shutter drive method of a camera having a step of performing exposure by the exposure value calculated in the metering circuit. In an electronic shutter driving method of a camera in which a focus adjusting lens moves to a focus position in association with a focus adjusting ring, and an opening and closing of a sector is performed in conjunction with an exposure adjusting ring, the initial position of the focusing lens feeding is set to the focus adjusting position. The focus adjusting lens is disposed at an intermediate point between the focus position of the focus lens for the set farthest object and the focus position of the focus lens for the set longest distance subject so as to be positioned at the middle end of the entire stage. In the step of setting the initial position of the focusing ring for driving the lens for the focusing adjustment, connecting the focusing ring and the exposure control ring to rotate in the same direction by a drive means, the sector opening and closing means can be operated If the direction of rotation of the drive means is reversed so as to ensure that the After the preceding step, the focusing ring can be rotated, and when the shutter switch is operated, the focusing ring is rotated in one direction or in order to perform the focusing adjustment of the focusing lens to a position calculated by the distance measuring circuit unit. Adjusting the focusing position by rotating the focusing lens to the sector side or the subject by rotating the focusing lens in the opposite direction, and in order to achieve proper exposure to the exposure value incident from the subject while the focusing is performed. A recess and a convex part are alternately formed around the circumference of the adjustment ring, and the convex part has an exposure adjusting ring having a protruding end for locking the sector cloth lever one by one so as to position the sector open lever so as to be disposed in the concave part to perform exposure. When the sector cloth lever is locked by the protruding end of the convex portion, Rotating the exposure control ring one step in the opposite direction and stopping the exposure control ring together with the focus control ring in such a state that the sector is opened and closed according to the exposure value calculated by the photometric circuit unit to perform exposure; Rotating the exposure control ring one step again so that the sector close lever is locked to the protruding end of the convex portion, and returning the focus control ring and the exposure control ring to initialize the system. How to drive the shutter. 3. The method of driving an electronic shutter of a camera according to claim 2, wherein when the direction of the driving means is switched, the focusing ring rotates after stopping by one step. 4. The method of driving an electronic shutter of a camera according to claim 2 or 3, wherein the focusing ring is directly connected to the clockwise rotation of the driving means and the initial position is set so as to stop one step with respect to the counterclockwise rotation. . 3. The method of driving an electronic shutter of a camera according to claim 2, wherein the power of the drive means rotates one step by 90 degrees. 3. The sector open lever as a sector opening and closing means as set forth in claim 2, wherein the sector open lever as a sector opening and closing means is held at a protruding end formed on an outer circumferential surface of the focusing ring at an initial position of the focusing ring so as to prevent malfunction of the sector due to external impact. Electronic shutter driving method of the configured camera. 7. The method of driving an electronic shutter of a camera according to claim 6, wherein the focus adjusting lens maintains its initial position even when the focusing ring is rotated in a section where the protruding end of the focusing ring engages the sector open lever. . The method of claim 6, wherein the sector open lever is rotated in the direction of opening the sector when the locking state by the convex portion of the focus adjustment ring is released, and rotates slower than the one-step rotation speed of the exposure adjustment ring by the governing means And flowing along the outer circumferential surface of the recess and the convex portion of the exposure control ring. The sector close lever as a sector opening and closing element is held by an exposure control magnet which is turned on when the shutter switch is operated, and closes the sector according to the exposure value calculated in the photometric circuit section. How to drive the electronic shutter of the camera. 10. The exposure control ring magnet according to claim 2 or 9, wherein after the automatic exposure is performed, the sector close lever is locked to the protruding end of the exposure control ring by one-clockwise rotation of the exposure control ring. And the sector cloth lever to be in an on state in a closed state, and to be turned off in a state where the exposure adjustment ring is returned to an initial position. 10. The sector open lever according to any one of claims 2, 8, and 9, wherein the sector open lever stops after the focus adjustment ring performs focus adjustment, and the sector cloth lever is formed at a main portion of the exposure control ring. And open the sector by rotating the sector driving pin clockwise as the exposure control ring stops while the exposure control magnet is latching the sector close lever. The rotation of the power source constituting the drive means is then rotated one step in the opposite direction to the initialization direction, at which point the exposure adjustment ring is automatically exposed and the focus adjustment ring has been returned to the opposite direction and initialized. A method of driving an electronic shutter of a camera in which an initial position is set in direct connection with. 3. The exposure control ring according to claim 2, wherein in the state in which the focus position adjustment is performed, an exposure adjustment ring in which recesses and convex portions are alternately formed around the circumference in order to achieve automatic exposure by the exposure value incident from the subject. The lock is released, and when the sector opening / closing means is locked by the protruding end of the convex portion, the apparatus rotates by one step, and in such a state, the exposure adjustment ring is stopped together with the focus adjustment ring in accordance with the exposure value calculated in the photometric circuit portion. An electronic shutter driving method of a camera, characterized in that the sector is opened and closed to perform exposure. 10. The method according to any one of claims 2, 8, and 9, wherein after the focus position adjustment is performed, the sector cloth lever is held at the protruding end of the exposure control ring, and the sector cloth lever is When the protrusion does not depend on the protruding end of the exposure adjusting ring, the exposure adjusting ring is stopped by the protruding end of the convex part by rotating the exposure adjusting ring by one step, and the exposure adjusting ring is stopped together with the focus adjusting ring to The sector is fully opened by the clockwise rotation, and the exposure adjustment ring is rotated one step clockwise to close the sector by the rotational force of the sectorclose lever, thereby closing the bulb exposure. A method of driving an electronic shutter of a camera to perform. 15. The sector cross lever according to claim 14, wherein the sector cross lever is locked by the exposure control magnet which is turned on when the shutter switch is operated, and is locked by the protruding end of the convex portion of the exposure control ring so that the sector is fully opened. The electronic shutter driving method of the camera to turn off the exposure control ring magnet. A driving means including a power source and transmitting the rotational force, and engaged with the driving means, rotating in the same direction as the power source, rotating after stopping for one step when the rotation direction of the power source is reversed, and calculated by the ranging circuit unit by the rotational force. The locking is released by stopping the focus adjustment ring for extracting the exposure adjustment lens by the calculated value, the exposure adjustment ring engaged with the driving means and rotating in the same direction as the power source, and the rotation operation of the focus and exposure adjustment ring. And sector opening / closing means for opening and closing the sector by the exposure value calculated in the photometric circuit portion. An electronic shutter driving apparatus of a camera in which a lens is moved to a focus position in association with a focus adjusting ring, and a sector is opened and closed in association with an exposure adjusting ring. A deceleration means which rotates after stopping for 1 step and the gear of the deceleration means rotates in the same direction as the power source, and focuses the exposure adjustment lens by the calculated value calculated by the ranging circuit by the rotational force. And a sector opening which is sewed by interposing a gear between the power source, the exposure adjusting ring rotating in the same direction as the power source, and opening the sector as the rotation operation of the exposure adjusting ring stops together with the focusing ring. The locking is released by the lever and the exposure adjustment ring, and the exposure is adjusted by the exposure value calculated by the photometric circuit unit. Dara As the power source of the network turned off, the electronic shutter drive device for a camera comprising a sector Claus lever for closing the sector. 18. The electronic shutter driving apparatus of claim 17, wherein the focusing ring is provided with a protruding end of the focusing ring convex locking the sector open lever in order to prevent a malfunction of the sector due to an external impact. 19. The electronic shutter driving apparatus of claim 18, wherein one end of the sector-open lever is engaged with the sector driving pin, and the other end is engaged with the governor gear whose rotation speed is accelerated by the anchor.