JPH10260440A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always start up a camera only by the operation of a main switch from a condition that a lens barrel is collapsed, and to eliminate the occurrence of unnecessary mechanical load by immediately stopping the lens barrel from extending and moving it on a collapsing position when the lens barrel is detected not to be extended in the middle of extending the lens barrel. SOLUTION: When extending abnormality occurs in a process that the lens barrel 51 is extended to the initial position of normal photographing or close-up photographing from a position where the collapsing of the lens barrel 51 is stopped; energizing to a motor 170 is stopped, so that the lens barrel 51 is stopped at the position. When the lens barrel 51 is detected that it stops for a specified time in the middle of extending, the lens barrel 51 is moved to the collapsing position. When extending abnormality occurs in the process of AF lens drive that the lens barrel 51 is extended to the initial position of the normal photographing or the close-up photographing to a focusing position, and AF lens drive abnormality occurs; the lens barrel 51 retreats to the position where collapsing of the lens barrel is stopped. In either case, a driving means is protected when the extending abnormality occurs in the middle of extending the lens barrel 51, and a user can easily recognize the abnormality occurrence.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for compensating a normal operation of a taking lens.

[0002]

2. Description of the Related Art Some cameras, for example, retract a photographing lens by driving a motor, and perform photographing by moving the photographing lens from an initial position to a predetermined position during photographing.

[0003]

In a collapsible camera or a camera in which the amount of extension of the lens barrel changes in accordance with a change in photographing conditions and photographing modes, the lens barrel extension operation is an essential operation. Further, when performing a focusing operation, there may be a case where an accompanying extension operation is required. Cameras like these are
In general, there is no factor that causes the lens barrel to be retracted, but when the lens barrel is extended, it may not be able to operate due to obstacles.

In some cases, the power switch is accidentally operated while the camera is being carried, and the lens barrel is extended. If it is attempted to forcibly extend in a state where there is an obstacle, the mechanical load is large, and even if the robot stops at a point where it cannot be operated, the lens barrel is left protruding, which is not preferable. This is a serious problem especially when carrying.

The present invention has been made in view of the above circumstances, and a user can always start the camera only by operating the main switch from the collapsed state, and when the lens barrel cannot be extended, useless mechanical burden is required. It is an object of the present invention to provide a camera that does not cause the problem and allows the user to recognize that there is an abnormality or a failure.

[0006]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.

According to a first aspect of the present invention, there is provided a camera for retracting a lens barrel into a main body in a belt state and moving the lens barrel to an extension area in a photographing state for photographing. A main switch for switching the lens barrel, a release switch for performing a shooting operation, and switching means for changing the amount of extension of the lens barrel. When it is detected that the lens barrel has stopped for a predetermined time during the extension, the lens barrel is Moving the camera to the retracted position. ].

According to the first aspect of the present invention, when it is detected that the lens barrel cannot be extended during the extension of the lens barrel,
Immediately stop this and move the lens barrel to the retracted position, so even if the power switch is operated by mistake,
The user can always start the camera only by operating the main switch from the collapsed state.

Further, when the extension amount of the lens barrel changes according to the change of the photographing conditions and the photographing mode, and when the lens barrel cannot be extended even if the extension is performed in accordance with the focusing operation, immediately, Since the feeding is stopped and the lens barrel is moved to the retracted position, there is no unnecessary mechanical burden, and the user can be made aware that there is an abnormality or an obstacle.

[0010]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 to 6 show a camera to which the present invention is applied. FIG. 1 is a front view of the camera, FIG. 2 is a rear view of the camera, FIG. 3 is a plan view, and FIG. FIG. 5 and FIG. 5 are views showing the display of the viewfinder, and FIG. 6 is a view showing the display of the back cover.

The camera body comprises a main body 10, a front cover 20, a decorative panel 30, and a back cover 40, as shown in FIG.
The decorative panel 30 is engaged with the front side of the front cover 20.
Are engaged and screwed so as to cover the main body 10. Back cover 4
The battery cover 41 and the battery cover 41 are integrally attached to a bearing portion 42a of the main body mounting body 42 via a hinge shaft 43, and the main body mounting body 42 is engaged with the main body 10 and further fixed with screws.

An unexposed film accommodating chamber 14 and an exposed film accommodating chamber 15 are formed in the main body 10 with an image frame section 13 interposed therebetween. The unexposed film accommodating chamber 14 accommodates the patrone 1 and is exposed. The film F is wound on a reel 16 provided in the exposure film storage chamber 15.

A front base plate 17 is provided at the center of the main body 10. A lens barrel frame 22 provided with a photographing lens 50 is provided on the front base plate 17 so as to be integrally movable with the lens barrel 51 in the optical axis direction. It is supposed to.

Further, a release button 2, a close-up button 3 and a main switch button 4 are provided on the upper surface of the front cover 20.

The photographing lens 50 is composed of four groups and includes four lenses. The photographing lens 50 is mounted on the lens barrel 22 via supports 52 and 53, and the lens barrel 22 is mounted on the lens barrel 51. As the photographing lens 50, a between-type in which a shutter 54 is disposed between the lenses is used.

Finder Mechanism As the finder mechanism, an Albada-type bright frame see-through finder is used. This finder 60
5 is provided with a display as shown in FIG. 5, there are shooting range frames 61 and 62, an AF frame 63, a distance measurement completion (lighting), a distance warning (flashing) display 64, and a close-up mode (lighting) display. 65, a blitz mark 66 and the like.

[0018] Upon focusing mechanism focusing mechanism photographing, change the distance between the imaging lens 50 and the film surface according to the distance to the subject, thereby adjusting the focus so that the image of the subject is focused correctly film surface. Projection AF as distance measuring mechanism for focus adjustment
A lens 70 and a light-receiving AF lens 71 are provided above the front base plate 17 and are covered with AF windows 72 and 73 of the decorative panel 30, and an infrared non-scan active type automatic ranging is employed. The lens barrel 51 holding the photographing lens 50 is extended by driving the motor 170, and the lens group is driven straight to adjust the focus. The lens barrel 51 has a photographing window 55 on the front side. The photographing window 55 is covered with a lens barrier 140 to protect the photographing lens 50 inside.

The lens barrier 140 starts to open when the lens barrel 51 is extended, opens completely when it reaches the initial position for normal photographing, and retracts when the lens barrel 51 retreats to a stop position for collapsing. It has become. That is, the lens barrel 5
If 1 is retracted and the camera is mobile,
The lens barrier 140 has a completely closed structure.

Shutter Mechanism The shutter mechanism has a function of temporally providing a necessary exposure amount to the film and a function of blocking unnecessary light except for the exposure time. A shutter motor 80 is driven to open and close the shutter 54. The shutter 54 is a programmed shutter, and further uses a self-timer.

The self-timer is operated by operating a mode selection button SS1, which will be described later, to set a self-timer mode.
The shutter 54 is activated when the release button 2 is pressed, and opens and closes about 10 seconds after the release button 2 is pressed. While the self-timer is operating, the self-timer display light emitting diode SLED 214 is turned on for about 7 seconds, and then blinks for about 3 seconds. When the opening / closing operation of the shutter 54 is completed, the self-timer mode is automatically released, and the mode returns to the automatic flash emission mode. To release the self-timer mode, the main switch button 4 may be pressed.

Automatic exposure mechanism In order to give an appropriate exposure to the film, the exposure amount is adjusted by measuring the brightness of light on the object side which fits on the screen. A CdS (cadmium sulfide) light receiving element 90 is used to convert an electric signal according to the amount of incident light. The light receiving element 90 is attached to the front base plate 17 and is covered with the AE light receiving window 91 of the decorative panel 30.

The interlocking range of the exposure control is the film sensitivity ISO
100, the EV of the subject brightness is in the range of 5 to 17,
If the EV value is 9 or less, the mode is automatically switched to strobe automatic emission.

This camera uses a patrone film with a DX code. When the film is inserted into the camera, the film speed ISO 50 to 3200 is automatically set, and all non-DX films are automatically set to the speed ISO 100. You.

The flash tube 100 of the strobe mechanism flash mechanism is fixed above the unexposed film chamber 14 of the body 10 is covered with the window 101 of the decorative panel 30. In the strobe automatic flash mode, the flash is automatically emitted when the subject brightness is lower than a predetermined value, and the flash is always automatically charged. The capacitor 7 of the charging circuit is arranged close to the exposure film storage chamber 15 of the main body 10.

The film winding mechanism employs an automatic winding system using a motor 110, and is driven via a winding unit 111. This is an auto-loading method that is started by operating the release button 2 after the back cover 40 is closed.

Film rewinding mechanism The film rewinding mechanism is automatically rewound when the last frame is photographed, and automatically stopped when rewinding is completed. Rewinding decrements the film counter and displays the film feed mark in the reverse direction.

In the case of the DX film, the rewinding is automatically stopped after the leading end of the film is wound into the cartridge, and in the case of the non-DX film, the rewinding is automatically stopped leaving the leading end of the film.

The control display unit 12 of the auto-date and shooting information on the back cover back cover 40
0 is provided via a back cover base plate 44, and a film confirmation window 6 is further formed. The date display unit 121 and the photographing information display unit 12
2 are provided. Further, a mode switching button SS1
And a date mode switching button SS2, a correction location selection button SS3 for selecting a correction location for the date, hour and minute, and an addition button SS4 for adding the date display.

Each time the mode switching button SS1 is pressed, the automatic light emission mode, the forced light emission mode, the non-light emission mode and the self-timer mode are switched in this order.
In the automatic flash mode, the flash automatically emits light when the subject brightness is equal to or lower than the luminance. In the forced flash mode, the flash always emits light every time a picture is taken.

In the non-emission mode, when the mode switch button SS1 is continuously pressed, the mode is switched to the film rewind mode via the self-timer mode, and the release button 2 is pressed while the mode switch button SS1 is pressed. Then, rewinding of the film is started. When the rewinding is completed, the mode automatically returns to the automatic flash emission mode.

One 3V lithium battery 8 is stored in the battery chamber 18 of the power supply body 10 and can be replaced by opening and closing the battery cover 41 by the user. Furthermore, it functions as an auto-date function and also functions as a backup power source for the main power source.
One V coin battery 9 is provided in the battery storage chamber 45 of the back cover 40.

Automatic date A digital clock of a liquid crystal display is built in the control display unit 120 as an automatic date, and the date display unit 121 provided on the LCD unit decoration plate 130 of the back cover 40 displays “date” and “date”.
“Month / Year”, “Day / Month / Year”, “Date and Time” or “OFF Mode” is displayed, and the above-mentioned date mode switching button SS2, a correction point selection button for selecting a correction point of the year, month, day and hour respectively. The adjustment is made by operating the addition button SS4 for adding the date display SS3 and date display.

[0034] photographing information display unit 122 of the photographing information display back cover 40, a battery remaining amount display 122a as shown in FIG. 6, the film counter 12
2b and a film feed display 122c are provided.
In addition, the flash 122d and the self-timer mode 122e, the automatic flash mode 122f, the forced flash mode 122g, and the non-flash mode 122h are switched and displayed, all of which are liquid crystal displays.

The barrel operating mechanism 7 through 10 shows a lens barrel of the actuating mechanism, FIG. 7 is a sectional view of the barrel body, FIG. 8 ¬ over ¬ sectional view of FIG. 7, FIG. 9 7 FIG. 10 is a cross-sectional view of FIG. 8.

As shown in FIG. 8, a support frame 21 is provided on the front base plate 17, and a lens barrel 51 is provided on the support frame 21 so as to be able to advance and retreat in the optical axis direction, and the lens barrel 51 is collapsed. Further, the lens barrel frame 22 is fixed to the lens barrel 51, and both operate integrally.

A support portion 22 formed at the lower end of the barrel frame 22
a is slidably supported on a guide shaft 158 via a bearing 157, and as shown in FIG.
9 so as to be movable on a drive shaft 160. One end of the guide shaft 158 is fixed to the holding plate 161, the other end is fixed to the front base plate 17, one end of the drive shaft 160 is rotatably supported by the holding plate 161 fixed to the front base plate 17, and the other end is the front base plate. 17 is rotatably supported via a bearing 162, and the rotation of the drive shaft 160 causes the lens barrel frame 22 to move linearly in the optical axis direction. The position restricting member 1 inserted into the front base plate 17 is provided on the support portion 22 a of the lens barrel frame 22.
63 is in contact with the front end plate 163a via a spring 164.
, The female screw bearing 1 of the drive shaft 160 and the lens barrel frame 22
The backlash between the lens barrel 59 and the lens barrel 59 is absorbed, so that the lens barrel frame 22 operates accurately. The female screw bearing 159 is supported by a pressing plate 165 fixed to the support portion 22 a of the lens barrel frame 22, and the female screw bearing 159 is prevented from falling out of the lens barrel frame 22 by this pressing plate 165. .

A drive gear 166 is provided on the drive shaft 160. As shown in FIG. 7, the drive gear 166 meshes with an output gear 171 of a motor 170 via intermediate gears 167, 168, and 169. By driving the motor 170, its power is transmitted to these intermediate gears 167, 168, 16
9 to the drive gear 166, whereby the drive shaft 160 is rotated.

The motor 170 is provided with rotating blades 172, and the number of rotations is detected by a photocoupler 173, and is used as control information for moving the lens barrel 51 in the optical axis direction. The photocoupler is a detection element in which a light source and a light receiving element are arranged to face each other, and detects whether there is an opaque object between the light source and the light reception.

FIG. 8 shows a mounting portion 22a of the lens barrel frame 22.
As shown in the figure, an operating member 174 is provided, and the operating member 174 is provided with a contact piece 175. This piece 1
Reference numeral 75 slides on the control board 176 in conjunction with the lens barrel 51, as shown in FIGS. The control board 176 is attached to the wall 17b of the front base plate 17, and the control board 176 is provided with a power contact 175b and camera body side contacts 175c to 175g.
When 1 is extended in the optical axis direction, the contact piece 175 is retracted at the stop position Y1, the normal photographing initial position Y2, the normal photographing amount count base Y3, the close-up photographing initial position Y4, and the close-up photographing amount count. Information on the base point Y5 is provided to the control unit, and these constitute a switch for detecting the position of the photographing lens 50. This switch functions as a lens position switch or an AF trigger switch depending on the relationship with the camera body side contacts 175c to 175g.

The control board 176 has a protrusion 176a at one end.
Into the recess 17c of the front base plate 17, and the other end 176
b is engaged between stoppers 177 and 178 of a holding plate 161 fixed to the front base plate 17, and is supported movably in the optical axis direction. The control board 176 has a position adjustment window 17.
6c, and the adjusting bolt 179 is attached to the wall 17 of the front base plate 17 through the position adjusting window 176c.
b. The mounting shaft 179a of the adjustment bolt 179 is at a position deviated from the center of the head 179b, and the control board 176 is rotated by the rotation of the adjustment bolt 179.
Moves in the optical axis direction to adjust the position.

As shown in FIG. 7, a shutter drive mechanism is disposed inside the lens barrel 51, and a release button 2 is provided.
The motor 80 is driven by the operation of
Is transmitted to the teeth 86a of the shutter ring 86 via the intermediate gears 82, 83, 84, 85, thereby rotating the shutter ring 86 and opening and closing the three shutter blades 54c. Each of the shutter blades 54c is rotatably supported by the lens barrel 51 via a support pin 87. An engagement hole 54a is formed at the base of the shutter blade 54c, and a shutter ring is formed in the engagement hole 54a. An operating pin 88 fixed to 86 is engaged,
The rotation of the shutter ring 86 opens and closes the shutter blade 54c.

The shutter ring 86 always has its projection 86
b is set so as to come into contact with a stopper 89a fixed to the lens barrel 51 side, and the stopper 89b regulates the position during the opening operation.

A contact piece 54b is formed on the shutter blade 54c, and the photocoupler 99 detects the contact piece 54b to perform time management of shutter control and detect an abnormal shutter.

The photographing lens switching mechanism in the camera of this embodiment, when pressing the release button 2, a series of operations is started about photography, it is terminated by winding one frame of exposed film, the release button 2 pressing In the initial stroke, the first release switch S
1 is turned on, and in the subsequent stroke, the second release switch S2 is turned on. First release switch S1
Is turned on, shooting preparation operations such as distance measurement for subject distance measurement and photometry for subject brightness measurement are performed. When the second release switch S2 is turned on, opening and closing of a shutter, filming and filming, and the like are performed. The processing operation after photographing is performed.

The shortest photographable distance of a general camera is 0.6 to
Although there are many cases where the distance is set to about 1.2 m, the camera according to this embodiment enables a so-called close-up photographing of a subject at a closer distance to expand the photographable distance range. A close-up shooting mode is provided.
In the normal shooting mode, it is possible to shoot a subject in a range from a predetermined normal shooting close range to infinity (this range is referred to as a normal shooting range). It is possible to shoot a subject at a long distance (this range is called a close-up shooting range), and furthermore, the normal shooting range and the close-up shooting range are made continuous by matching the close-up distance for normal shooting and the close-up shooting distance.
However, for example, three shooting modes of a short-range shooting mode, a middle-range shooting mode, and a long-range shooting mode may be provided,
Two or more shooting modes such as a super close-up shooting mode, a close-up shooting mode, and a normal shooting mode may be provided.

The close-up button 3 is a button for switching the photographing mode. When the button is pressed in the normal photographing mode in which the lens barrel 51 is at the initial position Y2 for normal photographing, the close-up switch is turned on, and the lens barrel 51 is turned on.
Reaches the initial position Y4 for close-up shooting and stops, and the camera switches to the close-up shooting mode. When the close-up button 3 is pressed while the camera is in the close-up shooting mode,
When the close-up switch is turned on, the lens barrel 51 moves backward, reaches the initial position Y2 for normal photographing and stops, and the camera switches to the normal photographing mode.

When the main switch button 4 is pressed while the lens barrel 51 is in the retracted stop position Y1 and the camera is in the portable posture, the main switch is turned on, the power is excited, and the MAINCPU 201 described later operates. Is started, the power hold for holding the excited state of the power supply is performed, the lens barrel 51 is extended, reaches the initial position Y2 for normal photographing and stops, the camera enters the normal photographing mode, and the power hold is released. When the camera is in the normal shooting mode or the close-up shooting mode, when the main switch button 4 is pressed, the main switch is turned on, the power is held in the same manner as described above, the lens barrel 51 is retracted, and the lens barrel 51 is retracted to the stop position Y1. Stops and the camera is in a mobile position,
Power hold is released. The lens barrier 140 covering the photographing window 55 in conjunction with the extension of the lens barrel 51.
Is opened, and the lens barrier 140 is linked with the retraction of the lens barrel 51.
Is closed to cover the imaging window 55 and protect the imaging lens 50. Further, when the camera is in the portable posture, other operations except for the automatic loading of the film and the rewinding of the film in the middle cannot be performed.

The control circuit 11 is a schematic circuit block diagram of a camera to which the present invention is applied.

This camera has a MAINCPU 201 and an S
The UBCPU 202 is used, and information is exchanged alternately with a serial interface. MAINCP
U201 executes a control sequence of a drive system requiring a large current and a control sequence of a photographing operation of the camera, and the SUBCPU 202 drives a photographing information display unit 122 of the back cover unit 203,
Also, the switch information is given to the MAINCPU 201, and M
The AINCPU 201 is caused to perform various controls.

A power supply is connected to the DC-DC converter 204, and the DC-DC converter 204 turns on the main switch or turns on the first release switch S1.
It is started by power control from the SUBCPU 202 started at N. As a result, the voltage Vdd becomes M
Given to the AINCPU 201,
Starts. Further, the voltage Vcc from the DC-DC converter 204 is changed to the power of the control switches other than the release switches S1 and S2, the main switch, the close-up switch, and the mode switch, and the voltage Vdd is set to each CPU.
And the voltage Vb of the lithium battery 8
Is a power supply of the SUBCPU 202 and the strobe unit, and a voltage Vb 'of the lithium battery 8 is a power supply of a driving system requiring a large current. Further, a DC-DC converter different from 204 is provided in the strobe unit 205.

The activated MAIN CPU 201 receives, as analog information 206, battery check information BC, photometric information AV, temperature information TH for temperature compensation of the motor driver, and shutter trigger delay time information STD for correcting shutter opening. You. This battery check information BC is transmitted to the SUBCPU2 by the serial interface.
02, the SUBCPU 202 displays this information as a battery level display 122a. Further, switch information 207 of a DX switch, a lens position switch, and an AF trigger switch is input to the MAIN CPU 201.

Further, the distance measurement information is fetched from the AF unit 208 as an analog signal, and if the result of the distance measurement is within the photographable distance range corresponding to the photographing mode selected at that time, the display control in F by the MAIN CPU 201 is performed. To turn on the AFLED, to turn on the CULED in the close-up shooting mode, and to turn on the LBLED when the subject brightness is below a predetermined value in the automatic light emission mode. Distance measurement completion and distance warning display 64 in the viewfinder,
It is displayed as a close-up mode display 65 and a blitz mark 66, respectively. The AFLED blinks when the result of the distance measurement is out of the photographable distance range according to the photographing mode selected at that time, the LBLED lights up in the forced light emission mode, and the subject brightness is set to a predetermined value in the non-lighting mode. Flashes when the value is less than the value.

When the second release switch S2 is turned on, the MAIN CPU 201 performs lens motor control for controlling the lens motor driver 210 based on the distance measurement information, drives the motor 170, extends the photographing lens 50, and stops at a predetermined position. Let it. At this time, the contact piece 17
The trigger information of the AF trigger switch that comes out of the photocoupler 5 when it comes into contact with the main body side contact 175e or 175G,
The position of the photographing lens 50 is controlled based on the information on the number of rotations of the motor 3. Since the photographing lens 50 is extended in accordance with the distance measurement information, the extension amount count base point Y3 or Y5 (depending on the selected photographing mode) of the photographing lens 50 is detected by the trigger information from the AF trigger switch. Count base point Y3 or Y5
From when the motor 170 is rotated a predetermined number of times. Then, according to the photometric information AV, a shutter motor control for controlling the shutter motor driver 211 is performed, and the motor 80 is driven to control the shutter 5.
Activate 4 to expose the film. At this time, the opening and closing of the shutter 54 is detected by the photocoupler 99.

When the exposure is completed, the lens motor driver 210 is controlled again to move the photographing lens 50 to the initial position Y2 or Y4 (depending on the selected photographing mode).
The film motor is controlled by controlling the film motor driver 212, and the motor 110 is driven to wind the film. At this time, while reading the switch information from the perforation switch 213, it is checked whether or not the film has been wound by one frame.

A charging signal is sent from the SUBCPU 202 to the strobe unit 205, and the strobe unit 205
Sends a charge completion signal to the SUBCPU 202, and EF control is performed between the two. The flash control of the strobe unit 205 is MAINC
The flash tube 100 emits light from the PU 201. The self-timer display SLED 214 is the SUBCPU 202
Controlled by an external display control.

The SUBCPU 202 is driven by a coin battery disposed on the back cover 40, a voltage Vdd from the DC-DC converter 204 and a voltage Vb from the lithium battery 8 via a backup circuit 215 and a reset circuit 216.

Further, switch information 217 such as a release switch, a main switch, a close-up switch, and a back cover switch is input to the SUBCPU 202, a date module 218 is provided in the back cover unit 203, and a date module 218 is provided in the date module 218. Switch information 2 from mode switch, select switch and set switch
19 is inputted, and an LCD drive for outputting a liquid crystal display drive signal for imprinting a date and displaying a date is performed. Further, the SUBCPU 202 outputs a counter disposed on the back cover unit 203 and other signals for driving a liquid crystal display, and performs a counter LCD drive. A mode changeover switch 220 is provided on the back cover unit 203, and the mode can be switched by manual operation.

The switch information 219 from the switch is input, and an LCD drive for outputting a liquid crystal display drive signal for imprinting a date and displaying a date is performed. Also, S
The UBCPU 202 outputs a counter disposed on the back cover unit 203 and other signals for driving a liquid crystal display, and performs a counter LCD drive. Back cover unit 2
03 is provided with a mode changeover switch 220 so that the mode can be switched by manual operation.

Operation Sequence of Control Circuit FIG. 12 shows an operation sequence of the circuit block of the present invention.
It is divided into a sequence of the CPU 202.

The SUBCPU 202 outputs a reset signal ACL
Is reset in the IRSub routine, and is activated from the start to monitor the input of information to the microcomputer from the determination of MODE = 1. Then, when the first release switch S1 is turned ON in the determination of S1 = 1, the flag ф
When the film release error is determined by the determination of AL = 1, if the first release switch S1 is ON and an automatic load error occurs, the automatic load error is displayed in the ALSub routine (2) and the processing is terminated. Also,
If the flag No. REW-END = 1 is determined and the rewinding of the film has been completed, the process proceeds to the REWSSub routine (3) to display the completion of the film rewinding. Even if the first release switch S1 is ON, the back cover is opened. If you do not open it will not work. Further, when the flag фSTT = 1 is determined and the shutter is abnormal, the signal is branched and the signal is not received.

When these flags are not set,
Put the power hold on PH ← 1 and start the power supply.
The AINCPU 201 is started. MAINCPU201
Is started, I / OSET and RAMCLR are used to set the I / O port and clear the RAM, a BCSub routine performs a battery check, and DXSu
DX switch information is read in the routine b.

The information is read, and the battery check information, DX switch information, and test information are serially transferred to the SUBCPU 202 as 4-bit information using the serial interface in So, and
The remaining battery level is displayed in the C display Sub routine.
Here, if the remaining amount of the battery 8 is equal to or less than the predetermined value, the operation is stopped as an error E.

When the remaining amount of the battery 8 exceeds the predetermined value, the SUBCPU 202 executes the MAINCPU2
01 LD2S to shift to the LD2Sub routine
is sent, the SI of the MAINCPU 201 is sent.
Performs a branch 1 determination. When the process shifts to the LD2Sub routine, the lens position is checked, and the collapsing stop position and the like are determined by the flag φSEP determination.

In the LD2Sub routine, when the lens position is at the initial position for normal photographing, the MAINCPU2
At 01, the flow shifts to SI branch 1 determination. On the other hand, SUBC
In the PU 202, if the lens position is the initial position of the normal shooting and the rewinding has been completed by the determination of the flag $ REW = 1, the REWSSub instruction information is set to MAINC in So.
Transfer to PU 201 and end.

According to the back cover switch information in the Sb = 0 judgment,
If the back cover is open, the flag $ ALB = 1 and the WS
The subroutine proceeds to the subroutine, and transfers the WSub instruction information to the SI branch 2 determination of the MAINCPU 201. Flag фC
= 0, and if the counter is zero, the flag фDX =
It is determined in step 1 whether the loaded film is a DX film or not.
ALSU for MAINCPU 201 SI branch 2 determination
b, the SUBCPU 202 waits for an auto load, and the MAINCPU 201 sets the AL
The automatic loading operation is performed by the Sub routine.

When the film has been counted up and when the counter is zero and the film is a DX film, L
The information transferred by the D2 Sub-Litin is determined. If SEP = 11, the lens barrel 51 is at the initial position of the normal shooting or the close-up shooting, and shooting is possible.
In the case of EP = 00, the lens barrel 51 is at the retracting stop position, so the procedure is terminated. In the case of фSEP = 01, the lens barrel 51 was extended, but stopped at an indefinite position. Since it is at the stop position, the mode is returned to the automatic light emission mode, and the processing ends.

When the lens barrel 51 is at the initial position for normal shooting or close-up shooting, if S1 = 1 is determined and the first release switch S1 is OFF, the strobe main capacitor is charged and turned ON in the CHGSSub routine. In this case, the flag $ TEST = 1 is determined. If the test mode is set, the test process is performed. If the test mode is not set, the transfer is performed by the serial interface at So. Here, the main routine instruction of MainRout, the mode information of the flag $ MODE, and the counter information of the flag $ C are 4-bit information, and are transferred to the MAINCPU 201 in the SI branch 2 determination.

The SUBCPU 202 waits in the AFSub routine, the MAINCPU 201 makes a branch 2 determination in SI, reads the photometry information when the process moves to the AESub routine, reads the distance measurement information in the AFSub routine, and reads the distance measurement information. SUBCPU20
2 to the AFSub routine. This distance measurement information is R [AF] or R [CAF], where R [AF] is RAM information for distance measurement in the normal shooting mode, and R [CAF] is RAM information for distance measurement in the close-up shooting mode. 4 bits to 2
Transferred repeatedly.

The SUBCPU 202 waits for the second release switch S2 to be turned on in the determination of S2 = 1, and the MAINCPU 201 turns on the AFLED for distance measurement in the FLEDSub routine. Indicates that the CULED is turned on, the LBLED is turned on when the subject brightness is lower than a predetermined value in the automatic light emission mode or in the forced light emission mode, and the AFLED is used when the distance measurement result is closer or farther than the photographable distance range. Blinks, and the LBLED blinks and waits when the subject brightness is lower than a predetermined value in the non-emission mode.

When the second release switch S2 is turned on in the determination of S2 = 1 by the SUBCPU 202, the serial transfer port of Sin changes the normal low state to the high state by Sin ← 1, and sends the information of Sin = 1 to the MAINCPU 201. , SUBCPU 202 waits for 16 ms and waits for Si
Set n ← 0 and set FLEDSub of MAINCPU201.
The routine surely shifts from the routine to the SI, and then the self-timer mode is determined by the flag $ MODE determination.

If the self-timer mode is not set, S
o, R [STD] information is 8 bits, MAINCPU2
Transfer to 01. This STD information is 8-bit information of a shutter trigger relay time film. After the film is wound, information is exchanged by a WSub routine. The information is read by the WSub routine of the MAINCPU 201, transferred to the SUBCPU 202, and transferred to the SUBCPU 202.
202 stores this information.
It is sent to the NCPU 201. In the case of the self-timer mode, the mode shifts to the SELFSub-reach, and then R [S
TD].

When the STD information is sent to the MAIN CPU 201, the processing exits the SI, and the SUB CPU 202 executes the SDS.
The MAINCPU 201 waits in the ub routine, determines whether the zone is equal to or higher than ISO zone 4, determines whether
TET ← 1 is set, and the lighting time for imprinting is switched. And set DATEX ← 1 to
This signal is for imprinting a date and emits light, and this signal is output for 5 ms. When this signal is output, about several tens of meters
The s light is emitted and the date is imprinted.

When this is completed, DATEX ← 0, DA
Initialization is performed by setting TET ← 0, the taking lens 50 is extended in the AFLDSub routine, and the shutter 54 is opened and closed in the SDSub routine. This shutter 54
If the operation signal of the shutter 54 does not come in the middle of opening or closing, the flag $ STT is raised. If a failure occurs during the opening or closing of the shutter, the flag фSTT = 1 is set, and this information is stored in the SUBCPU 202.
Is sent to to make a trouble determination.

If there is no abnormality, the flag фSTT = 0 is sent, and the MAIN CPU 201 returns the photographing lens 50 in the LDRSub routine, shifts to the WSub routine, and winds the film.

In the SUBCPU 202, the flag $ MODE
To determine whether the mode is the self-time mode. If the mode is not the self-time mode, the flow shifts to film winding in the WSub routine. In the case of the self-timer mode, the mode display is set to the automatic light-emitting mode, the flag φMODE is set to the automatic light-emitting mode, and then the process proceeds to the winding of the WSub-retin film.

The above-described operation sequence is performed. However, the SUBCPU 202 operates from the start and sets the MOD before the first release switch S1 is pressed.
In the E = 1 judgment, ON / OFF of the mode switch is judged. If MODE is 1, that is, the mode switch is ON, the shutter trouble is judged by the flag $ STT = 1 judgment. In the case of abnormality, a signal is received thereafter. Absent. If the status is normal, the mode display is switched and the flag фMOD
The mode information is also switched by E, and the self-timer mode is determined by the flag $ MODE. If the mode is not the self-timer mode, the MODE = 0 determination is waited until the mode switch is released, and the mode returns to the MODE = 1 determination again.

In the self-timer mode, 1 second is set in the timer by T ← 1 s. If MODE = 1 is determined and the mode switch is ON for 1 second or longer, the timer ends.
In the judgment, the feed display is retracted, the self-display is turned off, and the rewind display blinks. Then, in this blinking state, S2 =
When the second release switch S2 is turned on in the first determination, P
By setting H ← 1, фAL ← 0, the MAINCPU 201 is activated, the feed display is restored, the automatic light emission mode is set, the feed display is turned off, the battery tick display is performed in the BC display Sub routine, and the REWSub instruction is performed in So. The information is serially transferred to the MAINCPU 201, and REWS
Manual rewinding of the film is performed in the ub routine.

If the second release switch S2 is not turned on, the rewind display is turned off if the mode switch is OFF in the judgment of MODE = 1, the feed display is restored, and the automatic light emission mode display is performed. Is performed, and the flag $ MODE is set to the automatic light emission mode, and the processing ends. MO
If the mode switch is ON in the determination of DE = 1, it is waiting for the second release switch S2 to be ON.

Then, when the SUBCPU 202 determines that S1 = 1 and the first release switch S1 is OFF and the main switch is ON and Scn = 1, collapsible switching is performed. Here, the collapse switch flag фScu is 0, and PH ← 1 is set to activate the MAINCPU 201. Also, turn on the close-up switch and set Sc
When u = 1, close-up collapsing switching is performed,
The retract switch flag is set to фScu ← 1.

The flag фBC,
Receiving фDX and фTEST information, battery tic display is performed in the BC display Sub routine, LD1Sub instruction is performed by So serial out, and flag фScu information is MAIN.
The data is transferred to the CPU 201. This information is MAINC
It is sent to the branch 1 determination of the SI of PU 201, and LD1Sub
The lens barrel is driven in a routine, and the flag SEP information
The lens position is transferred to the UBCPU 202 to check the lens position from the flag $ SEP information in the LD1Sub routine. When the flag фSEP = 11, the lens barrel 51 is at the initial position for normal shooting or close-up shooting, and the strobe condenser is charged in the CHGSSub routine. When the flag фSEP = 00, the lens barrel 51 is at the retracting stop position, and when the flag фSEP = 01, the lens barrel 51 is extended but stopped at an indefinite position.
The normal shooting mode is selected, the automatic flash mode is displayed,
The flag φMODE is set to the automatic light emission mode, and the process ends.

In the SBSub routine of the SUBCPU 202, the state of the back cover is monitored at one second intervals, and the back cover switch information is used to monitor that the back cover is opened.

Next, the test mode will be described. In this test mode, the camera is checked, and the test is performed using the counter display on the back cover. When the flag .phi.TEST = 1 is determined, the test mode is confirmed by setting SLED.fwdarw.1 in the test mode, and four types of tests of an automatic light emission mode, a forced light emission mode, a non-light emission mode, and a self-timer mode are performed. When the TEST1 information is transferred in the automatic flash mode and the first release switch S1 is ON, the zone information at the time of photometry is displayed, and the second release switch S2 is turned ON.
Then, the shutter is released, and a test of the automatic exposure mechanism can be performed. Both the photometric information and the exposure amount information are tested.

The TEST2 information is transferred in the forced light emission mode, and the flashing is read from the DX information. DX
Information is displayed for each zone, and a flashmatic control of the aperture value can be performed according to the displayed information. In this test, clear the counter and feed display, set SLED to 0, and set CHGS
Charging is performed in the ub routine. In the non-emission mode, T
The EST3 information is transferred, AF zone information is displayed by the first release switch S1, and the second release switch S2 is displayed.
Then, the lens is driven and the lens is advanced to the AF information, whereby the movement stroke of the photographing lens can be known.

The TEST4 information is transferred in the self-timer mode, and a test is performed to determine whether the shutter has been opened by the first release switch S1.

These mode tests are canceled by the mode switch.

Further, the SUBCPU 202 sets the flag $ S
When TT = 1, the sequence of symbol C is entered, the transfer segment is evacuated, all segments are blinked for a predetermined period of time, returned to lighting, and the first release switch S is determined by S1 = 0.
Wait for 1 to operate and end.

In the above operation sequence, the sequence from the symbol D turns off the power hold at PH ← 0,
After waiting for 00 ms, S1 = 0, MODE = 0, Scn = 0,
The process ends when Scu = 0. In addition, the sequence from the symbol E starts from a battery abnormality or the like, sets the flag $ BC ← 00 to protect the battery, turns off the battery, turns off the power hold in the same manner as described above, and ends.

FIGS. 13 and 14 are flowcharts for returning to the initial position due to an abnormality in the operation of extending the photographing lens, and for switching from the undefined position to the initial mode in conjunction with storage.

The first release switch S1ON is used to judge whether the auto-loading is in progress, the back cover is not opened even after rewinding is completed, or whether a shutter abnormality has occurred. Is set to 1, the power is held, a battery check is performed, the DX code is read, and data transfer is performed (steps 1 to 4).

The remaining battery level is checked from the battery information. If the remaining battery level is equal to or less than a predetermined value, a battery warning is issued, the power hold is turned off, and the process ends (steps 5 to 7). If the remaining battery charge exceeds a predetermined value, the remaining battery charge is displayed, and the lens barrel position is determined (steps 5, 8).

When the lens barrel 51 is at the stop position for collapsing, the initial position for normal photographing, or an undefined position other than the initial position for close-up photographing, a timer for limiting the collapsing operation time is set, and PHM is set to 1. The Vb 'power supply of the large current power supply is held, and the lens barrel 51 starts collapsing (steps 10-1).
2) It is determined whether the lens barrel position has reached the retracting stop position based on whether the lens position signal SEP becomes 1, and if the lens barrel 51 is not at the retracting stop position after a predetermined time has elapsed, the Vb 'power supply is held. The PHM is set to 0, the power hold is released, and the process ends (steps 13 to 15, 7). When the lens barrel 51 reaches the retracting stop position, a pulse counter for setting the number of pulses is set, and the pulse-shaped lens drive signal AFC by the photocoupler 173 becomes AFC = 1 within a predetermined time. Check if AFC = 0, and if AFC = 1 and AFC = 0 within a predetermined time,
Count down the pulse counter (Step 1)
6-24). When the pulse number reaches a predetermined number or when the timer is over in step 22 or 24, the retracting operation is stopped, the shutter blades are initialized, Vb 'power supply hold is released, and the flag ΦSEP is reset. 0
The value is set to 1 (steps 25 to 27-1), and the process jumps to step 28 for determining the stop during rewinding. If the lens barrel 51 is at the stop position for collapsing, the flag φSEP is set to 00, and then the stop during the rewinding in step 28 is determined.
If 1 is at the initial position for normal shooting or close-up shooting,
After the flag ΦSEP is set to 11, it is determined in step 28 that the rewinding is stopped halfway.

In step 28, it is confirmed whether or not the rewinding has been stopped halfway. If the rewinding has been stopped, rewinding is performed (step 29). When the rewinding is completed, it is confirmed whether the back cover is opened or closed. When the back cover is closed, it is checked whether or not the film counter display is zero or more than zero (steps 30 and 31). It is checked whether the film is a film or not, and in the case of a DX film, it is automatically loaded (steps 32 and 33).

When the back cover is open, when the film counter exceeds zero, or when the film loaded with the film counter is zero is not a DX film, the lens barrel position information is checked by the flag ΦSEP (step 3
4) If the flag ΦSEP = 00, the power hold is released and the process ends (step 35).

If the flag ΦSEP is 01, a predetermined initial mode is set and displayed, the power is held off, and the process is terminated (steps 36 and 7).

If the flag ΦSEP is 11, it is determined whether the first release switch S1 is ON or OFF (step 3).
7) If it is OFF, the strobe condenser 7 is charged (step 38).

If it is ON, it is determined whether or not the test mode has been designated. If the test mode has been designated, a camera test is performed (steps 39 and 40). If the test mode has not been designated, it is determined. Performs distance measurement for photometry, normal photography, or close-up photography, and performs display in the viewfinder based on this information (steps 41 to 43).

Next, the second release switch S2 is turned on.
If the first release switch S1 is ON, the flash capacitor 7 is charged if the first release switch S1 is OFF and the first release switch S1 is OFF (steps 44 to 46). It is determined whether the second release switch S2 is ON or OFF. If the second release switch S2 is ON, the display in the viewfinder is turned off, and if the self-timer mode is set, the process proceeds to a self-subroutine for operating the self-timer (steps 47 to 49). If the self-timer mode is not set, a date emission signal is output, the Vb 'power supply of the large current system is held, and the AF counter is set based on the calculation of the MAIN CPU 201 based on the distance measurement result (steps 50 to 50).
52). Then, the photographing lens 50 is extended to the in-focus position A
Start the F lens drive, set a timer to limit the lens extension time, and set the normal shooting AF trigger signal SA
In response to the NT or close-up photographing AF trigger signal SCAT, the lens barrel 51 moves the normal-photographing feed amount count base point Y within a predetermined time.
It is determined whether or not the lens barrel 51 has reached the feeding amount count base point Y5 for close-up photography (steps 53 to 56), and the AF lens drive in which the lens barrel 51 does not reach any of the above-mentioned feeding amount count base points within a predetermined time. If abnormal, the process jumps to step 57 and performs the retracting operation as described above. However, after the collapsing stop, the hold of the Vb 'power supply is released, the power hold is released, and the process ends.

In step 55, the lens barrel 51 reaches one of the above-mentioned feeding amount count base points, and the AF trigger signal S
When NAT or SCAT is output and the value of the set AF counter is greater than zero, a timer for limiting the lens barrel extension time is set, and the lens drive signal AFC does not become 1 within a predetermined time. In this case, it is determined that the AF lens drive is abnormal and the process jumps to step 57 (steps 73 to 75), and the collapsing operation similar to the above is performed.
If the AFC becomes 1 within the predetermined time, the timer for limiting the lens barrel extension time is set again. If the AFC does not become 0 within the predetermined time, the process jumps to step 57 as an AF lens drive abnormality. (Step 76
-78), if AFC becomes 0 within a predetermined time, A
The F counter is counted down (step 79). Continue until the AF counter becomes zero (step 8
0), such steps 73 to 80 are repeated.

If the AF counter has become zero, or if the AF counter has been set to zero in step 52, the motor 170 is switched to a constant speed operation by the governor (step 81), and a predetermined number of pulses is set. A pulse counter is set, and a timer for limiting the lens barrel extension time is set. If the lens drive signal AFC does not become 1 within a predetermined time, the process jumps to step 57 as an AF lens drive abnormality (steps 82 to 85). If the AFC becomes 1 within the predetermined time, the timer for limiting the lens barrel extension time is set again. If the AFC does not become 0 within the predetermined time, the AF lens drive is determined to be abnormal and the process proceeds to step 57. Jump (Steps 86-8)
8) If AFC becomes 0 within a predetermined time, the pulse counter in which the predetermined number of pulses is set is counted down (steps 89 and 90). Such steps 83 to 90 are repeated until the pulse counter becomes zero (step 90). When the pulse counter becomes zero, the AF lens drive is stopped (step 9).
1). Thereafter, upon confirmation of the stop of the lens drive signal AFC, the shutter is driven to move the photographing lens 50 backward, and when it reaches the initial position of the normal photographing or close-up photographing, the film is wound (steps 92 to 95). Then, the flash capacitor 7 is charged, the hold of the Vb 'power supply is released, the power hold is released, and the process ends (steps 96 and 97).

[0102] photographing lens moving flowchart 17 operation flowchart when moving the photographing lens by operating the main switch button 4, FIG. 18 is a storage time chart of the photographic lens.

The power is held by the main switch SWON by operating the main switch button 4, the battery is checked, the DX code is read, and the data is transferred (steps 1 to 4). Then, a battery check is performed based on the battery information. If the remaining battery charge is equal to or less than a predetermined value, a battery warning is issued, the power hold is released, and the process is terminated (steps 5 to 7). When the remaining battery power exceeds a predetermined value, the remaining battery power is displayed, a timer for limiting the moving time of the lens barrel 51 is set, and the hold signal PHM of the high-current power supply Vb 'is output to output the lens. The lens barrel position is determined based on the value of the position signal SEP (steps 8 to 11). Lens barrel 5 with SEP = 1
When 1 is at the retracted stop position, the lens barrel 51 is extended,
When the lens barrel 51 reaches the initial position for normal photographing and the timer expires before the lens position signal SNP becomes 1, the Vd 'power supply hold and the power hold are turned off and the process ends. When the lens position signal SNP becomes 1 within a predetermined time, a counter is set to set the number of pulses, and a timer for limiting the pulse count time is set (steps 15 and 16). Then, from the output of the pulse-like lens drive signal AFC by the photocoupler, AFC = 1 and AFC = 0 are determined and the number of pulses is counted.
3) Stop feeding (step 24). Then V
b 'The power supply hold is turned off, the main capacitor of the strobe is charged (steps 25 and 26), the power is turned off, and the processing is ended.

Within a predetermined time, AFC = 1 or AFC =
Similarly, when the value does not become 0, the feeding is stopped. Then, the Vb 'power supply hold is turned off, the main capacitor of the strobe is charged, the power is turned off, and the process ends.

On the other hand, in step 11, the lens barrel 51 is
When the lens barrel is at a position other than the stop position of the collapsible lens 1
Is started, the lens barrel 51 reaches the initial position of the collapse,
The photographing lens is moved until the lens position signal SEP becomes 1. When the lens position signal SEP does not become 1 within a predetermined time, the power supply hold and the power hold are turned off, and the processing ends. When the lens position signal SEP becomes 1 within a predetermined time (steps 27 to 2)
9) Set a counter to set the number of pulses, set a timer to limit the pulse count time,
From the output of the lens drive signal AFC, AFC = 1 or A
FC = 0 is determined and the number of pulses is counted. When the number of pulses reaches the specified number of pulses (steps 30 to 38), the motor is reversed at a high speed as shown in FIG. 'The power supply hold is turned off, a predetermined initial mode is set and displayed, and the power hold is turned off and the process is terminated (steps 39 to 41).

If AFC does not become 1 within a predetermined time, the collapsing is stopped in the same manner, the power supply hold is turned off, and a predetermined initial mode is set and displayed.
Release power hold and exit.

In the camera of the present invention, when an operation required for photographing is performed, the photographing lens 50 moves according to the above-described flowchart. The shooting operation when the camera operates normally is performed as follows.

When the main switch button 4 is operated while the camera is in a portable state and the lens barrel 51 is in the retracted stop position, the main switch is turned ON, and the lens barrel 51 is extended according to the flowchart of FIG. Stop at the position. If the close-up button is further operated when the subject is close and close-up shooting is required, the close-up switch SW is turned on. Although not described here, the lens position switch SW is operated in the same procedure as in steps 12 to 24 in FIG. The lens barrel 51 is extended while judging ON and OFF, and stops at the initial position of close-up photography. When the lens barrel 51 stops at the initial position of the normal shooting or the close-up shooting, the release button 2 is operated to turn on the first release switch S1 and the second release switch S2.
According to the flowchart shown in FIG. 3 and FIG. 14, the lens barrel 51 is extended by a required extension amount calculated based on the distance measurement result, stopped at the in-focus position, the shutter 54 is opened and closed, and the lens barrel 51 is operated by operating the release button 2. It retreats to any of the initial positions that it had stopped previously and winds up the film by one frame. According to the flowchart of FIG. 17, if an abnormality occurs during the process in which the lens barrel 51 is extended from the retracted stop position to the initial position of the normal imaging or close-up imaging, the power to the motor 170 is cut off and the lens barrel 51 is moved to that position. Stop at Thus, the user can recognize that the feeding abnormality has occurred. However, even if the user operates the release button 2 without recognizing it,
The lens barrel 51 retreats to the retracted stop position according to the flowchart of FIG. 13, so that it can be recognized that the normal photographing operation was not performed.

When the lens barrel 51 is extended from the initial position of normal photographing or close-up photographing to the in-focus position in the course of the AF lens drive shown in FIG. 14 and an abnormality occurs in the AF lens drive, the lens barrel 51 is collapsed. Is retracted to the stop position, so that the user can recognize the occurrence of the abnormality.

In other words, in any case, if a feeding abnormality occurs during the feeding operation of the lens barrel 51, the driving means is protected and the lens barrel 51 behaves differently from the normal operation. The occurrence of an abnormality can be easily recognized.

If the user attempts to take a picture again,
It is sufficient to perform the operation when the camera is in a portable state, and no special operation is required.

[0111]

As described above, according to the present invention, if it is detected that the lens barrel cannot be extended during the course of the lens barrel extension, this is immediately stopped and the lens barrel is moved to the retracted position. Even if the power switch is operated by mistake, the user can always start the camera only by operating the main switch from the collapsed state.

Further, if the amount of extension of the lens barrel changes according to the change of the photographing conditions and the photographing mode, and if the extension of the lens barrel is not possible even if the extension is performed with the focusing operation, immediately. Since the feeding is stopped and the lens barrel is moved to the retracted position, there is no unnecessary mechanical burden, and the user can be made aware that there is an abnormality or an obstacle.

[Brief description of the drawings]

FIG. 1 is a front view of a camera.

FIG. 2 is a rear view of the camera.

FIG. 3 is a plan view of the camera.

FIG. 4 is a cross-sectional view of FIG. 1;

FIG. 5 is a view showing a display of a finder.

FIG. 6 is a diagram showing a display on a back cover.

FIG. 7 is a sectional view of a lens barrel.

FIG. 8 is a sectional view taken along the line in FIG. 7;

FIG. 9 is a cross-sectional view of FIG. 7;

FIG. 10 is a sectional view taken along the line in FIG.

FIG. 11 is a schematic circuit block diagram of a camera.

FIG. 12 is an operation sequence of a circuit block.

FIG. 13 is a flowchart illustrating a process of returning to an initial position due to an abnormality in an operation of extending a photographing lens, and switching from an undefined position to an initial mode in conjunction with storage.

FIG. 14 is a flowchart for switching to an initial mode by returning to an initial position due to an abnormality in an operation of extending a photographic lens, and switching from an undefined position to storage in conjunction with storage.

FIG. 15 is an abnormality detection time chart of the taking-lens extension operation immediately before the AF lens drive.

FIG. 16 is an abnormality detection time chart of the taking-lens extension operation after the AF lens drive.

FIG. 17 is an operation flowchart when the main switch button 4 is operated to move the taking lens.

FIG. 18 is a storage time chart of the photographing lens.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body 22 Lens frame 50 Shooting lens 51 Lens barrel 170 Motor 201 MAINCPU 202 SUBCPU 210 Lens motor driver 173 Photo interrupter

Claims (1)

[Claims] A main switch for switching between the portable state and the photographing state in a camera for performing photographing by moving the lens barrel to a main body in a belt state and moving the lens barrel to an extension area in a photographing state; A release switch for performing an operation, and switching means for changing an extension amount of the lens barrel, wherein when it is detected that the lens barrel has stopped for a predetermined time during the extension, the lens barrel is moved to a retracted position. A camera characterized by the following.