KR0157516B1 - Electronic shutter operating method of a camera and its apparatus - Google Patents

Abstract

[Objective] Shorten the moving distance of the focusing lens to be extracted by the calculated distance from the subject, and shorten the time required for focusing. By eliminating the locking mechanism that stops the rotation of the focusing ring at the time when focusing is completed, the structural stability of the product, the improvement of productivity, and the reduction of production cost are achieved.

[Configuration] With the focusing lens placed at the midpoint between the maximum and minimum feeding positions, the focusing lens is positioned so that the initial focus of the focusing lens feeding is at the middle end of the entire stage of the auto focusing position. Setting an initial focus of the rotating member interlocking with the lens; When operating the shutter switch, the rotating member interlocked with the first driving means is rotated in one direction or the opposite direction from the initial focus position, in order to direct the focus adjusting lens to the auto focus position set by the calculation value calculated by the distance measuring circuit section. Adjusting the focus position while moving the focus adjusting lens to a maximum or minimum feeding position; When the focal position adjustment is completed, the automatic exposure is opened by opening and closing the sector held by the elastic member in accordance with the exposure value calculated by the photometric circuit unit in conjunction with the second driving means that rotates in both directions in accordance with the direction of application of the electrode. A method of driving an electronic shutter of a camera comprising at least a step of performing the same, and a driving device for realizing the same.

Description

Camera electronic shutter driving method and device

1 is a diagram for explaining an electronic shutter driving method of a camera according to the present invention.

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

3 is a longitudinal sectional view showing a first drive means according to the present invention;

4 is a bottom view showing first and second driving means according to the present invention;

5 and 6 are a longitudinal sectional view and a plan view showing a coupling state of the focusing lens and the rotating member according to the present invention.

7 is a longitudinal sectional view showing a support structure of the lens barrel according to the present invention.

8 is a plan view showing a sector according to the present invention.

9 is a view for explaining an initial position detecting means according to the present invention.

10 is a block diagram illustrating an initial position detection method according to the present invention.

11 is a view showing an initial state of a power source according to the present invention.

12 is a diagram showing a normal signal of a photoreflector and an exposure start point of a sector according to the present invention.

Fig. 13 (a-d) is a diagram showing an error signal of the photoreflector according to the present invention.

14 is a diagram for explaining an electronic shutter driving procedure of a conventionally known camera.

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a method of driving an electronic shutter of a camera and a driving apparatus thereof.

[Prior art]

In general, the electronic shutter of the camera has an auto focus control for directing a focusing lens to an arbitrary distance of a subject by the distance measured, and an auto exposure control for controlling a combination of an aperture and a shutter speed for an appropriate exposure amount of a subject. It is configured to be performed sequentially or automatically.

As the electronic shutter of such a camera, conventionally known US Patent Nos. 4,918,480 (October 27, 1988), 4,634,254 (June 20, 1985), 5,111,230 (August 28, 1990) and Japan Korean Patent Publication No. 61-9632 (January 17, 1986).

The prior arts in common include a focus adjusting ring for directing a focus adjusting lens with respect to a subject by its distanced distance, and a locking mechanism for stopping rotation of the focus adjusting ring when the focus adjusting lens is moved to a focus position. do.

In addition, the sector opening and closing means for opening and closing 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 initial to return the focus control ring and the exposure control ring to the initial position at the end of the automatic exposure And a power source for operating the focus adjustment ring, the exposure control ring and the locking mechanism.

In the driving method for feeding the focus adjusting lens, the related arts operate such that the focus adjusting ring sequentially moves the focus adjusting lens from the minimum feeding position to the maximum feeding position, or from the maximum feeding position to the minimum feeding position. .

Here, the minimum feeding position refers to the focusing position of the focusing lens for the set farthest object, and the maximum feeding position refers to the focusing position of the focusing lens on the closest subject.

More specifically, the driving sequence of the electronic shutter, which is conventionally known and described in US Pat. No. 5,111,230, is well illustrated in FIG.

As can be seen from the figure, the focus adjusting lens is fed from the minimum feeding position j to the maximum feeding position k by the focus adjusting ring.

In this case, the focus adjusting lens is returned to the minimum feeding position j by the reverse driving of the focus adjusting ring when it is fed out by the measured distance L of the subject (when the focus adjusting position is reached).

[Problem to Solve Invention]

On the other hand, in recent years, the electronic shutter of the camera has set a multi-stage focusing step from the minimum focusing position to the maximum focusing position of the focusing lens in order to enhance the focus control function on the subject.

This multistage tendency of focus adjustment eventually lengthens the time taken to adjust the focus, thereby prolonging the responsiveness of the electronic shutter.

More specifically, in the conventional camera, the initial position of the focus adjustment ring is set at the minimum feeding position end or the maximum feeding position end.

Therefore, the focusing ring is rotated from the initial position, i.e., the minimum feeding position or the maximum feeding position end, to an arbitrary position so that the focusing lens can be adjusted by focusing the focusing lens by the distance of the subject. Only then, focusing of the focusing lens is possible.

In this driving method, if it takes [X] ms to drive the first stage of the focusing ring, the time taken from the beginning to the end (that is, the maximum feeding position) reaches [maximum stage × X] ms to achieve focus adjustment. This results in excessive time consuming problems.

In addition, the electronic shutter of the camera related to the prior art must have a locking mechanism which stops the rotation of the focusing ring at the time when the focusing lens is extracted by the distance of the subject, which makes the structure complicated.

[Means to solve the problem]

The present invention has been made to solve the problems of the prior art as described above, the purpose of which is to shorten the moving distance of the focusing lens to be fed by the calculated value measured relative to the distance of the subject, the time required for focusing The present invention provides a method for driving an electronic shutter of a camera excellent in response to an electronic shutter.

Still another object of the present invention is to remove the locking mechanism for stopping the rotation of the focusing ring at the time when focus adjustment is completed, thereby achieving structural simplicity and stability, as well as an electronic shutter of a camera for realizing the above-described driving method. In providing a drive device.

In order to realize the above object, the present invention provides a focus adjusting lens at a midpoint between the maximum feeding position and the minimum feeding position so that the initial position of the focusing lens feeding is located at the middle end of all the steps of the auto focus adjusting position. Setting an initial position of a rotating member interlocked with the focus adjusting lens in the arranged state; When the shutter switch is operated, the rotating member interlocked with the first driving means is moved in one direction or from the initial position, in order to direct the lens to the focal position corresponding to the focal position set by the calculation value calculated by the distance measuring circuit unit. Rotating in the opposite direction to adjust the focusing position while moving the focusing lens to the maximum or minimum feeding position; When the focal position adjustment is completed, the automatic exposure is opened by opening and closing the sector held by the elastic member in accordance with the exposure value calculated by the photometric circuit unit in conjunction with the second driving means that rotates in both directions in accordance with the direction of application of the electrode. It proposes a method of driving an electronic shutter of a camera comprising the step of performing.

In the electronic shutter driving method of the present invention, the initial position setting of the rotating member is performed when the shutter switch is operated to calculate the distance and the exposure value of the subject in the range circuit unit and the photometric circuit unit, and in conjunction with the shutter, the shutter starts to operate, or When the power is turned off and on in the electronic circuit unit, the position of the rotating member interlocking with the focusing lens is detected by the initial position detecting means, and the rotating member is positioned until the rotating member is positioned at the initial position by the initial position adjusting means. By adjusting it.

In addition, the stepping motor, which is the first driving means used in the present invention, has a peak (45 °, -135 °, -225 ° based on 11th degree) while the rotating rotor is magnetically stabilized only when power is applied to the coil of the stator. , -315 ° rotation point) and a stable stability point (90 °, -180 °, -270 °, -360 ° rotation point of 11th degree) which is magnetically stable even when the power is cut off. Therefore, since an additional security mechanism (locking mechanism) is required to position the focusing lens at the vertex while in the present invention, the focusing lens is stably positioned without additional supplementary mechanism in the present invention by using only the stable point.

In addition, the present invention includes a first driving means including a power source that is step-driven to reduce and transmit the rotational force; A rotating member engaged with the driving means and rotating in the same direction as a power source, and feeding the focus adjusting lens by the calculated value calculated by the ranging circuit unit by the rotational force; The position of the rotating member when the shutter switch is operated to calculate the distance and exposure value of the subject in the range circuit section and the photometric circuit section, and when the shutter starts to operate in conjunction with it, or when the electronic circuit section is turned off and on. An initial position detecting and adjusting means for detecting a and adjusting the rotating member to a predetermined initial position when the rotating member interlocked with the focus adjusting lens is not positioned at the initial position; An electronic shutter driving apparatus of the camera, characterized in that it comprises at least a second driving means which is held by the elastic member to keep the sector closed at all times, and drives when the power is applied according to the exposure value calculated by the photometric circuit unit to open and close the sector. Suggest.

EXAMPLE

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment for realizing the present invention will be described below with reference to the accompanying drawings.

1 is a view for explaining a method of driving an electronic shutter of a camera according to the present invention, in which reference numeral a denotes an initial position of a focusing lens.

The initial position (a) of the focusing lens is set at an intermediate end between the minimum feeding position (b) and the maximum feeding position (c), and is used for adjusting the focus by the calculated value of the ranged distance measuring circuit for an arbitrary distance of the subject. The lens can be fed by the first driving means.

Here, the initial position (a) of the lens for adjusting the focus is 20 stages, which is the intermediate stage, assuming that the entire stage of the auto focus adjustment is 40 stages, the maximum feeding position (c) and the minimum feeding position (b) are It can be seen that it becomes 40 steps and 1 step, respectively.

More specifically, the electronic shutter driving method of the present invention sets the initial position (a) of the focusing lens feeding as the starting point of the auto focusing position adjustment, and rotates the rotating member interlocked with the lens clockwise or counterclockwise. By bidirectional driving in the direction CCW, automatic focusing of the focusing lens is performed.

Therefore, according to the present invention, it is possible to achieve a reduction in focus adjustment time of at least two times or more, as compared with the conventional method of feeding the focus adjusting lens from the minimum feeding position to the maximum feeding position or from the maximum feeding position to the minimum feeding position.

The electronic shutter driving apparatus of the camera for realizing the technical idea of the present invention as described above is shown in FIGS.

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

Reference numeral 1 denotes a power source as first driving means. This power source 1 is composed of a rotor 2, a four-pole permanent magnet, a motor gear 3 integrally formed with the rotor 2, and a pair of stators 5.

In this case, the power source 1 is rotated clockwise or counterclockwise by 90 degrees in one step manual operation, and one step is composed of two driving pulses. The power source 1 is located on the motor base 10, the motor cover 20 is coupled to the upper side.

In addition, the first driving means includes a reduction gear portion that is engaged with the power source 1 and transmits rotational force. The reduction gear portion is made up of a combination of a plurality of second gears 7, 9, 11, as shown in more detail in FIGS. 3 and 4.

Here, the gear 7 is meshed with the motor gear 3 of the power source 1, and another gear 11 is meshed with a rotating member interlocked with the lens for adjusting the focus. The reduction gear unit configured as described above is positioned in the shutter base 30 and coupled to the lower side of the motor base 10.

The rotating member is a focus adjusting ring 13 which is engaged with the reduction gear unit and rotates in the same direction as the power source 1.

As shown in FIG. 5, the focus adjustment ring 13 forms a helicoid portion (not shown) on an inner circumferential surface thereof and engages with the lens holder 15. In addition, the lens holder 15 is integrally coupled with the lens barrel 17.

At this time, the focus adjustment ring 13 is rotatably supported between the shutter base 30 and the motor base 10.

In addition, as shown in FIG. 6, the lens holder 15 has a motor cover such that the anti-rotation protrusion 19 formed on the outer circumferential surface thereof is fitted with the anti-rotation groove 21 formed on the motor cover 20. It is inserted in the inner peripheral surface of (20).

Accordingly, the lens holder 15 has the focus control ring 13 interlocked with the power source 1 by bidirectional rotation, along the anti-rotation groove 21 of the motor cover 20. Will be moved to.

On the other hand, the lens barrel 17 is supported by the motor cover 20 via the coil spring 23, which is an elastic member, which is generated by the engagement of the focus adjustment ring 13 and the lens holder 15. It is to prevent the play.

More specifically, the lens barrel 17 has a groove 25 formed in the projection 29 of the lens barrel 17 and a pin formed in the motor cover 20, as shown in more detail in FIG. It is comprised so that a force may be always received upward of the figure through the coil spring 23 between (27).

In addition, the electronic shutter driving apparatus of the present invention operates the shutter switch to calculate the distance and exposure value of the subject in the range circuit unit and the photometric circuit unit, and when the shutter starts to operate in conjunction with the shutter switch, or when the electronic circuit unit is turned off and on. When it is in the state, the position of the focus adjustment ring 13 is detected, and when the focus adjustment ring 13 is not located at the set initial position, the initial stage for adjusting the focus adjustment ring 13 to the initial position Position detection and adjustment means.

As shown in FIG. 4, the initial position detecting and adjusting means includes a protrusion 131 formed on the focus adjusting ring 13, a gear part 132, and a photo interrupter 31.

Here, when the protrusion 131 of the focus adjustment ring 13 is out of the initial position, the photo interrupter 31 sends a signal to the power source 1 to turn the focus adjustment ring 13 clockwise or counterclockwise. Rotate it to its initial position.

In addition to the auto focus adjusting apparatus described above, the electronic shutter driving apparatus of the present invention includes an automatic exposure adjusting apparatus for opening and closing a sector.

This automatic exposure control device includes a separate second drive means.

As shown in FIGS. 2 and 4, the automatic exposure meta 41 as the second driving means has a boss 43 which rotates in one direction or the opposite direction in accordance with the direction in which the current is applied.

The boss 43 is engaged with the engaging jaw 47 of the gear lever 45 that is rotatably supported by the shutter base 30. In this case, the gear lever 45 is supported by the shutter base 30 via the elastic member 49.

Therefore, the automatic exposure meta 41 is always subjected to the elastic force in the counterclockwise direction, and rotates to overcome the force of the elastic member 49 during the clockwise driving.

In addition, the gear lever 45 is engaged with the sector lever 51 rotatably coupled to the shutter base 30, and the sector lever 51 has a sector pin 53 to hold two sectors ( 57, 59) at the same time.

Through this configuration, it can be seen that the sectors 57 and 59 are locked to the position which is always closed by the elastic member 49. In addition, as the second driving means of the present invention, the automatic exposure meta 41 overcomes the force of the elastic member 49 and opens the sectors 57 and 59 by the clockwise rotation thereof.

Here, as shown in FIGS. 2 and 8, the sectors 57 and 59 have a known structure and are mounted and supported by the shutter base 30, and the sector cover 40 is coupled to the lower side.

However, at least one sector 57 has a slot 61 formed therein, and the slot 61 is detected by the photo extractor 63 fixed to the shutter base 30, and thus the starting point of the automatic exposure control. Will be set.

Specifically, the sectors 57 and 59 are opened like the virtual lines 57 'and 59' by the clockwise rotation of the automatic exposure meta 41, wherein the photoreflector 63 is a sector. By recognizing the starting point of the opening 57, accurate control of the exposure value calculated by the photometric circuit unit is performed.

Based on the electronic shutter driving apparatus described above, the electronic shutter driving method of the present invention and its operation will be described in more detail.

First, the present invention sets the initial position so that the initial position of the focusing lens extraction is located at the intermediate end (a) of all the steps of the auto focusing position.

At this time, the initial position detecting and adjusting means detects the position of the focus adjusting ring 13 interlocked with the focus adjusting lens, and adjusts the focus adjusting ring 13 to the initial position. It demonstrates based on FIG. 10. FIG.

The power source 1 when the shutter switch is operated to calculate the distance and exposure value of the subject in the range circuit section and the photometric circuit section, and in conjunction with the shutter, or when the power is turned off and on in the electronic circuit section. Rotates clockwise so that the focus adjustment ring 13 of FIG. 9 interlocks clockwise.

At this time, when assuming that the photo interrupter 31 is positioned in the gear unit 132 of the focus adjustment ring 13 for the first time, a circuit (not shown) refers to a means for countering the number of driving pulse signals. It clears to 0 'and determines whether the current state of the photo interrupter 31 is' H' or 'L'.

Here, the state of the photo interrupter 31 is an output signal obtained by the light emitting portion and the light receiving portion, where 'H' represents a state where the signal of the light emitting portion is blocked and does not reach the light receiving portion, and 'L' represents a state of reaching the light receiving portion. .

Then, a clockwise driving pulse is applied and again, the state of the photo interrupter 31 is judged as 'H' or 'L', and if it is the same state, '1' is added to the counter means. 'To clear it.

Even when the clockwise driving pulse is subsequently applied, since the photo interrupter 31 is located in the gear portion 132 of the focus adjustment ring 13, the counter means is repeatedly cleared to '0'.

When the photo interrupter 31 is positioned on the projection 131 of the focus adjustment ring 13 by the clockwise driving pulse as described above, the photo interrupter 31 is in a state of 'H', and the counter means It will have more than a certain value (eg 8).

As a result, the circuit (not shown) detects that the current position of the focus adjustment ring 13 is the projection 131. Then, the clock interrupt pulse is applied to the photo interrupter 31 in the state of 'H'. Detects the time point changed to 'L'.

Finally, the circuit (not shown) confirms whether the power supply state of the step driving power source 1 is the initial state shown in FIG. 11, and turns off the power supply in that state.

However, if the state of the step driving power source 1 is not the same as the state of FIG. 11, the clockwise driving pulse is continuously applied, the power is turned off in the state coinciding with the state of FIG. Adjust

In this case, the step driving power source 1 shown in FIG. 11 shows a state in which 'H' power is applied to the 1,3 coils. Since one step of the step driving power source 1 is composed of two drive spreads, two 'H' or 'L' can be determined during one step driving.

On the contrary, in the second case, when the photo interrupter 31 is positioned at the opening 133 of the focus adjustment ring 13, a circuit not shown clears the means for counting the number of driving pulse signals to '0'. The photo interrupter 31 is operated to determine whether the current state is 'H' or 'L'.

In this case, the 'L' state is naturally detected, and the step driving power source 1 is rotated clockwise until the counter means reaches a value higher than a predetermined value (for example, 8).

Rotation until the counter means has a value equal to or greater than a predetermined value is for accurately determining the position of the focus adjustment ring 13 when the initial state of the step driving power source 1 is out of the state of FIG.

When the counter means has a value greater than or equal to a certain value by the continuous clockwise rotation, a circuit (not shown) detects that the current position of the focus adjustment ring 13 is the opening portion 133, and steps in the counterclockwise direction. The drive pulse is reversed to rotate the drive power source 1.

The focus adjustment ring 13 rotates counterclockwise by the inversion driving pulse, and detects a time point at which the state of the first photo interrupter 31 (not shown) is changed from 'L' to 'H'.

The circuit (not shown) rotates the focus adjustment ring 13 clockwise by switching the driving pulse back to a normal pulse after detecting the changed time point, and thereafter, the focus adjustment ring 13 is rotated in the same manner as the first case described above. Adjust the initial position.

After the initial position of the focusing lens and the focusing ring 13 is set, the present invention, by operating the shutter switch, by directing the focusing lens to the auto-focusing position set by the calculated value calculated by the ranging circuit unit to adjust the autofocusing Will be done.

At this time, as the first driving means, the power source 1 rotates the focus adjustment ring 13 in one direction or the opposite direction, thereby moving the focus adjusting lens to the maximum or minimum feeding position.

Here, the focus adjusting lens is integrally coupled with the lens holder 15, and since the lens holder 15 is prevented from rotating by the motor cover member 20, the rotation operation of the focus adjustment ring 13 The focusing lens is moved straight.

More specifically, the power source 1 rotates the focus adjustment ring 13 clockwise (see FIG. 4) via the reduction gear unit so that the focus adjusting lens is directed toward the sector side (lower side of FIG. 5). The lens for focusing is directed toward the subject by rotating in the opposite direction.

Here, the power source 1 is rotated by 90 degrees when driving one step, and rotates the focus control ring 13 by one step for one step driving of the power source. In addition, the focus adjustment ring 13 has a multi-stage focusing step.

On the other hand, when the focus adjustment is completed as described above, the power source 13 is to set a stabilization period of at least 20ms, which is to suppress the overrun phenomenon of the power source 1 as a stepping motor.

When the focus position adjustment is completed as described above, the present invention performs automatic exposure according to the exposure value calculated by the photometric circuit unit as the second driving means is operated.

At this time, the auto-exposure meta 41 as the second driving means rotates in the clockwise direction (see FIG. 4) and overcomes the force of the elastic member 49 as the current is applied, and the gear lever 45 interlocked therewith. The sectors 57 and 59 are opened by the rotation of the sector lever 51.

Here, the present invention detects the starting point of the exposure in order to accurately control the opening time of the sectors 57 and 59, that is, the exposure amount. This detection is done by the photoreflector 63 knowing the slot 61 position of the sector 57, the output signal of which is well illustrated in FIG.

That is, the photoreflector 63 generates two low pulse signals and two high pulse signals corresponding to the slot 61 of the sector 57, and one of the pulse signals is used as a starting point of exposure control. Precise control of the dosage can be achieved.

On the other hand, Fig. 13 (a-d) shows an error signal of the photoselector 63. Figs.

As shown, when the signal of the photo-collector 63 appears as one of (a), (b), (c) and (d), the control circuit (not shown) detects that the state is an error at that time, Display an error message on an undisplayed display.

On the other hand, the sectors 57 and 59 are closed by applying an opposite current to the auto-exposure meta 41. At this time, the elastic member 49 rotates the gear lever 45 counterclockwise with a restoring force. Let's do it.

[Effects of the Invention]

As in the above-described embodiment, it can be seen that the method of driving the electronic shutter of the camera according to the present invention shortens the moving distance of the focusing lens feeding, thereby shortening the time required for auto focusing of the camera.

That is, according to the present invention, the focusing lens starts the initial position at the intermediate stage of the entire focusing step, and is bidirectionally driven to the maximum and minimum feeding positions, thereby moving the lens to a minimum or maximum feeding position compared with the prior art. You can cut it in half.

In addition, the electronic shutter driving apparatus of the camera according to the present invention can realize structural simplification and stability by removing the locking mechanism for stopping the rotation of the rotating member when the focus adjustment is completed.

Claims (15)

Such that the initial position of the focusing lens extraction is located at an intermediate end between the focus position of the focusing lens for the set farthest subject and the focus position of the focusing lens for the set closest subject during the entire step of the auto focusing position. Setting an initial position of a rotating member interlocking with the focus adjusting lens while the focus adjusting lens is disposed at an intermediate point between the maximum feeding position and the minimum feeding position; When operating the shutter switch, in order to move the focus adjusting lens to the focusing position set according to the calculation value calculated by the ranging circuit unit, the rotating member interlocked with the first driving means is rotated in one direction or the opposite direction from the initial position. To adjust the focus; When the focus adjustment of the focus adjusting lens is completed, the sector opened and closed by the elastic member is interlocked with the second driving means which rotates in both directions in accordance with the direction of application of the electrode, according to the exposure value calculated by the photometric circuit unit. And means for actuating to perform exposure. In a method of driving an electronic shutter of a camera in which a focusing lens moves to a focusing position, and a sector is opened and closed in association with an exposure adjusting member, the initial position of the focusing lens feeding is the middle end of the entire step of the focusing position. The focus adjusting lens while the focus adjusting lens is disposed at an intermediate point between the focus position of the focus adjusting lens for the set farthest subject and the focus position of the focus adjusting lens for the set closest subject. Determining the position of the focus adjustment ring in association with the initial position detecting means, and setting an initial position such that the focus adjusting ring is positioned at an initial position set as the initial position adjusting means; When operating the shutter switch, the focus control ring is rotated in the same direction as the power source via the reduction gear to move the focus adjusting lens to the focusing position set according to the calculation value calculated by the ranging circuit. Rotating the focus clockwise or counterclockwise to adjust the focus position while the focus adjusting lens is multistagely directed toward the sector or the subject; In the state in which the focus position adjustment is performed as described above, in order to achieve automatic exposure by the exposure value incident from the subject, the sector held in the closed state by the elastic member is rotated in one direction as the current is applied. Automatic exposure meta is opened by rotating the force of the elastic member, and closed by restoring force of the elastic member as a result of applying a reverse current to the automatic exposure meta and returning, thereby automatically exposing according to the exposure value calculated in the photometric circuit portion. The electronic shutter driving method of the camera comprising the step of performing. 3. The method of driving an electronic shutter of a camera according to claim 2, wherein the power source of the first driving means rotates one step by 90 degrees. 4. The camera of claim 2 or 3, wherein a stabilization section of the stepping motor is set between applying the power to the auto exposure meta when the focus position adjustment is completed by stopping the focus adjustment ring. How to drive the shutter. The method of claim 4, wherein the stabilization period of the stepping motor is set to at least 20 ms. The initial position setting of the focus adjusting ring is a component of an initial position detecting means, the photo interrupter recognizes the changed position of the focus adjusting ring, and drives the power source to adjust the focus in a direction close to the initial position. The electronic shutter driving method of the camera, characterized in that it is set to the initial position while rotating the ring. The lens of claim 2, wherein the lens for adjusting the focus is moved by moving the lens holder engaged with the focus adjusting ring and slidably coupled while being prevented from rotating by the motor cover member while rotating the focus adjusting ring clockwise or counterclockwise. A method of driving an electronic shutter of a camera, characterized in that it directs toward a sector or a subject. The lens barrel of claim 2 or 7, wherein the lens barrel integrally coupled to the lens holder is subjected to a tension force toward the subject at all times through the elastic member so as to eliminate a gap error generated when the focus adjustment ring and the lens holder are geared together. The electronic shutter driving method of the camera, characterized in that the finger. The method of claim 2, wherein the automatic exposure meta is to overcome the force of the elastic member when the power is applied to rotate in one direction, and rotate the gear coupled sector lever to open the sector interlocked with the sector lever. Electronic shutter driving method. 3. The exposure control according to claim 2, wherein for accurate control of the exposure value calculated by the photometric circuit unit, the photo-collector measures that the slot of the sector opened by the automatic exposure meta is coincident with the slot formed in the shutter base and controls the exposure time. An electronic shutter driving method of a camera, characterized by setting as a starting point. First driving means including a power source and transmitting the deceleration force; A rotating member engaged with the driving means and rotating in the same direction as a power source, and feeding the focus adjusting lens by the calculated value calculated by the ranging circuit unit by the rotational force; Initial position detecting and adjusting means for adjusting the rotating member to an initial position when the rotating member is not located at an intermediate end between the maximum feeding position and the minimum feeding position when the camera is first powered on; An electronic shutter driving device of the camera, characterized in that it comprises at least a second driving means which is held by the elastic member to keep the sector closed at all times and is driven when the power is applied according to the exposure value calculated by the photometric circuit unit to open and close the sector. A power source; A reduction gear unit engaged with the power source and transmitting rotational force; A focus adjustment ring which is engaged with the reduction gear part and rotates in the same direction as a power source, and supplies a lens holder integrally coupled with the lens barrel by the calculated value calculated by the distance measuring circuit part by the rotational force; A photo interrupter for recognizing the changed position of the focus adjustment ring and operating the power source to return the focus adjustment ring to its initial position; An automatic exposure meta which is latched in one direction by the elastic member and overcomes the force of the elastic member and rotates or returns in the opposite direction according to the direction in which the current is applied; And a sector lever for opening and closing a sector in association with rotation of the automatic exposure meta. 13. The electronic shutter driving apparatus of claim 12, wherein the lens holder is screwed to the inner circumferential surface of the focus adjustment ring. 13. The electronic shutter driving apparatus of claim 12, wherein the anti-rotation protrusion formed on the outer circumferential surface of the lens holder is coupled to the anti-rotation groove formed on the motor cover to allow the slide movement. 15. The electronic shutter driving apparatus of the camera according to claim 12 or 14, wherein the lens barrel is supported by the motor cover via the elastic member.