JPH09197482A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a barrier from abutting on a lens by switching the driving transmitting state of a 2nd transmitting mechanism for driving a lens when a 1st transmitting mechanism for driving a barrier sets the barrier in a state of an opening position. SOLUTION: A main driving part switches and performs operation such as winding film, rewinding the film, driving a lens barrel and barriering a lens by the driving of one driving motor 11. A driving transmitting mechanism transmitting the driving force of the motor 11 and driving the lens and the barrier is provided with the 1st transmitting mechanisms 30 and 33 transmitting the driving force of the motor 11 so as to drive the barrier and the 2nd transmitting mechanisms 16, 34, 36 and 38 transmitting the driving force of the motor 11 so as to drive the lens. Then, driving switching mechanisms 15, 32, 33a and 35 switch the driving transmitting states of the mechanisms 16, 34, 36 and 38 by the driving force of the motor 11 so that the mechanisms 16, 34, 36 and 38 can transmit the driving force in a state where the mechanisms 30 and 33 set the barrier at the opening position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera in which a taking lens can move between a protruding state and a retracted state.

[0002]

2. Description of the Related Art There is a camera in which a motor provided in a camera body causes a photographing lens to project from the camera body when photographing, and a retracted state which is housed in the camera body so as to be portable when not photographing. . Further, there is a camera provided with a barrier that covers the entire surface of the lens in order to protect the lens in the retracted state. Further, there is also a camera having a drive mechanism for transmitting the drive force of one motor provided in the camera body by switching to a plurality of systems such as lens drive and film transport by using a planetary gear (for example, JP-A-6- No. 202209).

When the lens is extended in order to bring the lens into the projecting state in the closed position where the barrier covers the lens, the lens comes into contact with the barrier and a drive transmission member such as a gear for transmitting the driving force of the lens. , The barrier and the mechanism that supports it may be damaged. Therefore, there is a camera that detects the open / closed state of the barrier and controls the lens drive according to the detection.

[0004]

However, when the lens drive is controlled by detecting the open / closed state of the barrier, erroneous detection may occur and the lens may be driven even when the barrier is not in the open position. . In addition, even when the driving force transmission path of one motor is switched using a planetary gear to drive the lens and the barrier, the driving force for driving the lens can be transmitted regardless of the opening / closing state of the barrier. Therefore, the lens may be driven even when the barrier is not in the open position.

The present invention has been made in view of the above problems, and it is possible to reliably prevent contact between the barrier and the lens without driving the lens when the barrier is not in the open position. The purpose is to provide a camera.

[0006]

In order to solve the above-mentioned problems, the present invention is a camera in which a lens can be retracted, the lens (3) being movable in an optical axis direction, and a lens (3) when the lens is retracted. A barrier (5) capable of moving between a closed position covering the lens and an open position retracted from the movement path of the lens, a motor (11), and a drive transmission mechanism for transmitting the driving force of the motor to drive the lens and the barrier. (1), and the drive transmission mechanism includes a first transmission mechanism (30, 33, 6) for transmitting the driving force of the motor for driving the barrier.
2) and a second transmission mechanism (16, 34, 36, 38) for transmitting the driving force of the motor for driving the lens.
And drive transmission of the second transmission mechanism by the driving force of the motor so that the second transmission mechanism can transmit the driving force when the first transmission mechanism has the barrier in the open position. Drive switching mechanism (15, 3) for switching the state
2, 33a, 35).

[0007]

1 is a front view of a camera according to an embodiment of the present invention. Reference numeral 1 denotes a main drive unit, which has an output unit that switches four operations of film winding, film rewinding, lens barrel driving (including focus control), and lens barrier by driving one driving motor 11. Reference numeral 2 denotes a lens barrel driving unit, which is a driving unit for performing a retracting and extending operation of the lens barrel 3 by an output from the main driving unit 1. The lens barrel 3 has a photographing lens group and a lens shutter. 4 is a lens barrier drive unit,
This is a drive unit that opens and closes the lens barrier 5. The lens barrier 5 has an open position and a closed position. At this open position, the lens barrel 3 is retracted to a retractable state, and at the closed position, the lens barrel 3 is covered to protect the lens barrel 3.

Reference numeral 6 denotes a film winding spool, which has a gear portion 23 which meshes with an output gear 22 of the main drive portion 1 which will be described later.
And a claw portion 6a engaging with the perforation of the film
Having. The spool 6 is rotated by the output of the main drive unit 1, and the claw portion 6a is engaged with the perforation of the film, so that the spool 6 winds the film. A rewinding fork 7 meshes with the spool shaft of the film cartridge. The rewinding fork 7 can rotate integrally with the gear 8, and the output of the main drive unit 1 rotates the gear 8 to wind the drawn film into the film cartridge.

FIG. 2 shows a bottom view of the camera. The main drive unit 1 has output units 1a, 1b, 1c from the drive motor 11, and the output unit 1a (gear 38 described later) is for driving the lens barrel, and is on the front side of the camera near the lens barrel. It is located in. Further, the lens barrel driving section 2 is also arranged in the front part of the camera near the lens barrel. The output unit 1b (gear 27 described later) is for film rewinding and is arranged on the camera rear side (film surface side) with respect to the lens barrel driving output unit 1a. The output of the drive motor 11 is transmitted to 8, and the film pulled out by rotating the gear 8 is wound on the film cartridge. The output unit 1c (gear 22 described later) is for film winding, is located farther from the lens barrel 3 than the output unit 1a for driving the lens barrel, and is more lens than the output unit 1b for film rewinding. It is arranged at a position far from the lens barrel 3 and meshes with a gear 23 (described later) provided on the spool 6 to rotate the spool 6 in the film winding direction.

The lens barrier 5 is located in front of the lens barrel 3 when the power of the camera is off, and
Is protected. When the power of the camera is turned on, the lens barrier 5 is driven by the lens barrier drive unit 4 to a position retracted from the lens barrel 3, and the lens barrel 3 can be extended.

Next, the main drive unit 1 will be described with reference to FIGS. First, a description will be given with reference to FIG. The main drive unit 1 has a drive motor 11. Drive motor 1
1 is + Vcc for the positive terminal (not shown) and GN for the negative terminal
When D is added, it rotates counterclockwise in the figure, and when GND is added to the plus terminal and + Vcc is added to the minus terminal, it rotates counterclockwise in the figure. The gear 12 is press-fitted into the rotation shaft of the motor 11. When the motor 11 is energized in the normal rotation direction, the gear 12 rotates counterclockwise, and when the motor 11 is energized in the reverse rotation direction, the gear 12 is rotated. Rotate in the direction.

The gear 13 having P1 as its rotation axis is a gear 12
Further, the gear 14 provided coaxially with the gear 13 rotates integrally with the gear 13 via an overload preventing mechanism such as a slip clutch. Also, the axis P1 is
A lever 15 is attached which is rotatable about the rotation axis. The lever 15 has locked portions 15a and 15b, and also supports a planetary gear 16 that meshes with the gear 14. A weak friction mechanism is provided between the lever 15 and the planetary gear 16, and when the gear 14 rotates, the friction also causes the lever 15 to rotate in the same direction as the gear 14.

The gear 17 having P2 as its rotation axis is a gear 1
8 is integrally formed. Also, the axis P2 is the axis P2.
A lever 19 is attached which is rotatable about the rotation axis. The lever 19 has a locked portion 19 a, and also supports a planetary gear 20 that meshes with the gear 18. A weak friction mechanism is provided between the lever 19 and the planetary gear 20. When the gear 18 rotates, the friction also causes the lever 19 to rotate in the same direction as the gear 18.

The gear 27 is the gear of the film rewinding output section 1b described above. A lever 25 is attached to the rotary shaft P3 of the gear 27 so as to be rotatable about the shaft P3. The lever 25 is a planetary gear 2 that meshes with the gear 27.
Support 6. Although the lever 25 is biased counterclockwise in the figure by a spring (not shown), the end 25b of the lever 25 is in contact with a cam surface 31a of a cam 31 described later, and the lever 25 is counterclockwise. The rotation of is regulated by the cam 31.

In FIG. 3, the locking portion 25a of the lever 25 is retracted outside the rotation range of the locked portion 19a of the lever 19,
When the drive motor 11 rotates counterclockwise and the gear 18 rotates clockwise, the lever 19 rotates clockwise,
As shown in FIG. 4, the planetary gear 20 meshes with the gear 21,
The gear 21 rotates clockwise.

The gear 21 is formed integrally with the gear 22 of the film winding output section 1c. This gear 2
2 meshes with a gear 23 integrally formed with the spool 6. At least one claw portion 6a that engages with the perforation hole of the film is formed on the spool 6, and when the gear 22 rotates clockwise and the gear 23 rotates counterclockwise, the spool 6 also rotates. The film is wound around the spool 6 by rotating clockwise and the film is wound up.

In FIG. 3, a gear 28 meshing with the planetary gear 20 meshes with a gear 29, and a cam 30, a cam 31, and a cam 32 are integrally formed on the gear 29. One rotation of the gear 29 is divided into eight sections, that is, a film winding section, a film rewinding section, a retracting section, a lens feeding section, and a lever switching section between the sections. , SW4, SW
Depending on the combination of on / off of 5, the cams 30, 31,
The state of 32, that is, the rotational position of the gear 29 is detected.

In the state of FIG. 3, when the drive motor 11 rotates clockwise, the cam 31 also rotates clockwise,
The contact between the end 25b of the lever 25 and the cam surface 31a of the cam 31 is released, the lever 25 is rotated counterclockwise by a spring force (not shown), and the lever 25 is brought into the state shown in FIG. The planetary gear 26 thus engaged meshes with the gear 18.

In the state shown in FIG. 5, when the drive motor 11 rotates counterclockwise and the gear 18 rotates clockwise, the lever 19 rotates clockwise. However, as shown in FIG. 6, when the locked portion 19a of the lever 19 abuts on the locking portion 25a of the lever 25, the shaft P of the planetary gear 20 is stopped.
The rotation about 2 stops before meshing with the gear 21. In this state, the clockwise rotation of the gear 18 is transmitted only to the planet gear 26. The rotation of the gear 27 that meshes with the planetary gear 26 is transmitted to the gear 8 of FIG. 2 via a gear train (not shown), and the rewinding fork 7 rotates in the direction of rewinding the film to the cartridge.

When the cam 31 further rotates in the clockwise direction from the state shown in FIG. 5, the end 25b of the lever 25 contacts the cam surface 31b of the cam 31, and as the cam 31 rotates further, the lever 25 has a spring force (not shown). Against this, the planetary gear 26 and the gear 18 are disengaged by rotating clockwise around the axis P3. As shown in FIG. 7, when the end portion 25b of the lever 25 comes into contact with the cam surface 31a, the planetary gear 26 and the gear 18 are held out of engagement with each other.

The lever 33 is rotatably supported about the axis P4 and is urged clockwise by a spring (not shown), but the lever 33 is more biased than the state shown in FIG. 3 by a locking portion (not shown). It does not rotate clockwise. The lever 33 contacts the locked portion 15a of the lever 15 to prevent the lever 15 from rotating in the clockwise direction, and the cam portion 33b to contact the cam surfaces 30a and 30b of the cam 30 described above. Have. When the gear 29 rotates clockwise from the state of FIG. 3, the cam surface 30a of the cam 30 and the cam surface 33b of the lever 33 come into contact with each other, and when the gear 30 further rotates clockwise, the lever 33 resists a spring force (not shown). Then, it rotates around the axis P4 in the counterclockwise direction. And the cam surface 33b is the cam surface 3
0b, the locking portion 33a of the lever 33 and the locked portion 15a of the lever 15 are held in a released state,
As shown in FIGS. 7 to 10, the lever 15 can be rotated clockwise. Further, the lever 33 is provided with an end portion 33c, and when the lever 33 rotates in the counterclockwise direction around the axis P4, the end portion 33c will move to the action surface 6 of the lever 62 described later.
2a is contacted and the lens barrier 5 is moved to the open position.

The lever 35 is rotatably supported about the axis P4 and is urged counterclockwise by a spring (not shown). Also does not rotate counterclockwise. Lever 35
Rotatably supports the planetary gear 34, and the planetary gear 3
Reference numeral 4 meshes with the planetary gear 16, a gear 38 described later, or the planetary gear 36 according to the rotating state of the lever 35.

When the gear 29 rotates clockwise from the state shown in FIG. 3, the end portion 35a of the lever 35 causes the cam surface 3 of the cam 32 to move.
When the gear 29 comes into contact with 2a and further rotates in the clockwise direction, the lever 35 rotates in the clockwise direction around the axis P4 against a spring force (not shown). Then, as shown in FIG. 7, when the end portion 35a of the lever 35 comes into contact with the cam surface 32b of the cam 32, the clockwise rotation of the lever 35 around the axis P4 ends. The lever 35 has end faces 35b and 35c, and the end face 3
5b and 35c are in contact with a shaft 40 formed on a lever 37, which will be described later, and the rotation of the lever 35 causes the lever 37 to rotate about the axis P5.

The gear 38 is the gear of the above-mentioned lens barrel driving output section 1a, and the gear 38 is provided with a lever 37 which is rotatable about a rotation axis P5. Lever 37
Supports the planetary gear 36 in mesh with the gear 38. When the gear 29 rotates clockwise from the state of FIG. 5, the end 35a of the lever 35 and the cam surface 32a of the cam 32 are rotated.
The lever 35 rotates in the clockwise direction against the spring force (not shown) due to the abutment with, and the planetary gear 34 and the gear 38 are disengaged. On the other hand, when the lever 35 rotates clockwise against the spring force (not shown) from the state of FIG. 5, the end surface 35b of the lever 35 and the shaft 40 provided on the lever 37 come into contact with each other so that the lever 37 rotates around the shaft P5. Is rotated counterclockwise, and the planetary gear 36 starts to mesh with the planetary gear 34. Then, as shown in FIG. 7, when the end portion 35 a of the lever 35 contacts the cam surface 32 b of the cam 32, the planetary gear 36 meshes with the planetary gear 34.

When the gear 29 rotates clockwise from the state shown in FIG. 7, the end portion 35a of the lever 35 and the cam surface 3 of the cam 32 are rotated.
The contact with 2b is released, and the lever 35 is pressed by a spring force (not shown).
Rotates counterclockwise around the axis P4, and the planetary gear 34 starts to mesh with the gear 38. On the other hand, when the lever 35 is rotated counterclockwise by a spring (not shown), the lever 37 is rotated clockwise by the contact between the end surface portion 35c of the lever 35 and the shaft 40 provided on the lever 37, and the planetary gear 34 is rotated. And the planetary gear 36 disengage. The lever 35 is shown in FIG.
Then, the planetary gear 34 meshes with the gear 38. At this time, the tips of the planetary gear 34, the planetary gear 36, and the gear 38 are prevented from contacting at the same time, that is, the clockwise rotation of the cam 32 causes the lever 35 and the lever 37 to move from the state of FIG. 5 to the state of FIG. When rotating, the tip of the gear 38 and the planetary gear 34
The planetary gear 36 and the planetary gear 34 start to mesh with each other after the tooth tops of the planetary gears are separated from each other, and when the lever 35 and the lever 37 rotate from the state of FIG. 7 to the state of FIG. The end faces 35b, 3 of the shaft 40 and the lever 35 are set so that the gear 38 and the planetary gear 34 start to mesh with each other after the tooth tips are separated.
The position with 5c is set.

Reference numeral 39 is an encoder that rotates integrally with the gear 38. The encoder 39 is arranged between photo couplers (not shown) and outputs pulses from the photo couplers.

Next, the lens driving mechanism 2 shown in FIGS. 11, 12, 16 to 18 will be described. In FIG. 11, 5
Reference numeral 1 is a rotation transmission shaft, and 52 is a worm.
The gear 38 and the encoder 39 described above are attached to the device 1. The rotation of the rotating shaft 51 is vertically converted by the worm 52 and the worm wheel 53 into a rotating direction having the optical axis direction of the lens as the rotating shaft, and is transmitted to the feed screw 54 that rotates integrally with the worm wheel 53. The feed screw 54 is screwed into a female screw portion provided on the lens barrel 3, and the lens barrel 3 provided with a photographing lens group and a lens shutter (not shown) is moved by the rotational force of the feed screw 54 in the optical axis direction. Go straight to.

That is, the rotational force of the motor 11 is transmitted to the gear 38, the lens barrel 3 advances in the optical axis direction when the gear 38 rotates counterclockwise, and the lens barrel 3 rotates when the gear 38 rotates clockwise. Retreat in the direction of the optical axis. By moving the lens barrel 3 forward and backward, the taking lens unit (not shown) is retracted, extended, and focused. At this time, when the encoder 39 rotates, a photo coupler (not shown) outputs a pulse AP, and the rotation amount of the rotation transmission shaft 51 is detected.

Reference numeral 55 denotes a rectilinear movement member, and a female screw portion formed on the rectilinear movement member 55 is screwed with a male screw portion 51a provided on the rotation transmission shaft 51, and the lens is rotated by the rotation of the rotation transmission shaft 51. In conjunction with the movement of the lens barrel 3 in the optical axis direction, the lens barrel 3 moves straight along the axial direction on the rotation transmission shaft 51. Also,
The straight-moving member 55 is provided with SW6, and the movement of the straight-moving member 55 causes the SW6 to output a signal corresponding to the position of the lens barrel 3, and the output signal causes the position of the photographing lens group (not shown) to be changed. To be detected. That is, as shown in FIG. 18, the SW 6 outputs an OFF signal when the rectilinear movement member 55 is at a position corresponding to between the retracted position and the standby position.

The worm wheel 53 is provided with SW7. The SW7 outputs one ON pulse for each rotation of the worm wheel 53, and the rotation amount of the worm wheel 53 is detected by the number of pulses.

The lever 56 is rotatable about a rotation axis P6, and a shaft 56a provided on the lever 56 supports a torsion spring 57 whose one mounting portion is supported on the shaft P7. Torsion spring 5 shown in FIGS. 16c and 17b
The most compressed state of 7 is biased in both directions to the neutral point. Further, the cam surfaces 56b and 5 provided on the lever 56
6c comes into contact with the protrusion 55a provided on the rectilinear movement member 55 by the rectilinear movement of the rectilinear movement member 55, and the lever 56
Rotates until it exceeds the neutral point. Further, between the cam surfaces 56d and 56e provided on the lever 56, a pin 58a provided on a lever 58 which is rotatable around the rotation axis P8 is arranged, and the lever 58 responds to the rotation of the lever 56. It rotates between two positions that come into contact with a stopper (not shown). In the state of FIG. 16a, the locking portion 58b provided on the lever 58 comes out of contact with the locked portion 15b of the lever 15 described above, and in FIGS. 3 to 9, the lever 15 rotates counterclockwise around the axis P1. 17a, the engaging portion 58b is engaged with the engaged portion 15b in the state of FIG. 17a, as shown in FIG.
And the counterclockwise rotation of the lever 15 is prevented.

Next, the barrier drive mechanism 4 shown in FIGS. 14 to 16 will be described. The lens barrier 5 can be opened and closed in front of the lens barrel 3 at the time of sinking. In FIG.
The lens barrier 5 is integrally formed with a gear 5a having a link portion 5b provided on a lever 62 rotatable about a rotation axis P9 as a rotation center, while an internal gear having a center on the axis P9. 61 is fixed to the body, and this gear 5
a and the internal gear 61 mesh with each other. The lens barrier 5 is rotated around the link portion 5b by the rotation of the lever 62. Here, the lever 33 of the main drive unit 1 described above is connected to the shaft P4.
When it is rotated counterclockwise, the working surface 6 of the lever 62 is
2a contacts the end portion 33c of the lever 33, and the lens barrier 5 moves from the closed position shown in FIG. 14 to the open position shown in FIG.

The lever 63 is rotatable about the rotation axis P10, and a spring 64 is attached to the end portion of the lever 63 so that the axis P1 can be rotated.
It is biased clockwise around 0, and a pin 62b attached to the lever 62 is in contact with an elongated hole portion 63a of the lever 63. Therefore, the spring force of the spring 64 urges the lens barrier 5 in the closing direction.

The linearly moving member 65 is guided along the axial direction on the axis of the rotation transmitting shaft 51 and is urged downward by a spring 66. Further, in FIGS. 14 and 16a, the rectilinear movement member 65 is in contact with the rectilinear movement member 55,
The straight-moving member 65 is shown in FIG.
Of the cam surface 63b provided on the lever 63
The linearly moving member 55 follows the linear movement of the linearly moving member 55 until it comes into contact with.

From the above, when the lens barrier 5 is in the open state and the lens barrel 3 is extended by a predetermined amount, the projecting portion 65a of the rectilinear movement member 65 contacts the cam surface 63b of the lever 63, as shown in FIG. 16b. The rotation of the lever 63 in the clockwise direction is blocked, that is, the closing operation of the lens barrier 5 is blocked.

FIG. 19 shows a circuit diagram. Reference numeral 81 denotes a camera control microcomputer that performs functions such as camera sequence control and exposure calculation control, and is connected to the following circuits via a data bus, input / output terminals, and the like. M is the drive motor 11 described above, which performs film rotation, film rewinding, lens barrel extension, collapsing, barrier drive, and switching of each operation by performing normal rotation and reverse rotation.

Reference numeral 82 is a photometric circuit for measuring the brightness of the object, which is composed of a photoelectric conversion element for receiving light, an A / D conversion section, a reference voltage source for A / D conversion, a section for exchanging with the CPU 81, and the like.
Photometry is performed according to an instruction from the CPU 81, and an aperture value and a shutter speed are calculated.

Reference numeral 83 is a distance measuring circuit for measuring the distance to the object. The distance measuring circuit 83 measures the distance to the object according to an instruction from the CPU and calculates the amount of extension of the lens barrel 3.

Reference numeral 84 is an encoder section composed of a light emitting diode 84a and a phototransistor 84b, and outputs a pulse signal AP according to the rotation of the encoder 39 described above.

SW1 is a photometry / distance measurement start switch which is turned on in the first step of pressing down the release button, and CPU8
When SW1 is turned on, the signal No. 1 outputs a photometry start signal to the photometry circuit 82, and outputs a range measurement start signal to the range measurement circuit 83. SW2 is a release switch that is turned on in the second step of pressing down the release button, and when SW2 is turned on while the shutter is ready for release, the CPU 81 instructs the release operation. Note that when the release switch SW2 is turned on, the photometric switch SW1 is also kept in the on state.

SW8 is a main switch for switching whether to supply the power of the camera to the CPU. If the main switch SW8 is off, the power is not supplied to the CPU, and if the main switch SW8 is on, the power is supplied to the CPU. To do. SREW is a film midway rewind switch, and S
When REW is turned on, rewinding in the middle of the film is started. RESET is a reset terminal that is pulled up to VDD by the resistor R1 and resets the CPU when the L level changes to the H level. X is the CPU 81
It is a crystal oscillator for giving a clock signal to.

Next, the operation of the camera will be described with reference to the flowchart. FIG. 20 is a flowchart showing the operation when the main switch is turned on. When the main switch SW8 is off, the main drive unit 1 is in the state shown in FIG. In FIG. 3, when the main switch SW8 is turned on, step # 1
In step 01, the motor 11 (M) is energized in the reverse direction (clockwise in FIG. 3). When the motor 11 reversely rotates, the gear 12 rotates clockwise, and the rotation of the gear 12 causes the gear 13 and the gear 1 to rotate.
4, gear 16, gear 17, gear 18, gear 20, gear 2
8 is transmitted to the gear 29, and the gear 29 rotates clockwise. When the gear 29 rotates clockwise, the cam section is switched, and at the same time, the states of SW3, SW4 and SW5 change. The state of the cam 30, the cam 31, the cam 32, and the SW3, SW4, and SW5 of FIG. 3 is the film winding section, but when the gear 29 rotates clockwise, the rewinding section of FIG. 5 and the collapsing section of FIG. After that, the cam 30, cam 31, cam 32 and SW3, SW in the lens extension section of FIG.
4, SW5 state. SW3 in step # 102
When it is detected by SW4 and SW5 that the cam 30, cam 31, and cam 32 have reached the lens extension section, the process proceeds to step # 103, and the motor 11 is braked for t1 hour.

The main operation in step # 101 will be described. When the gear 29 rotates clockwise, the cam 30 integrated with the gear 29 rotates clockwise, and the cam surface 33b of the lever 33 abuts the cam surface 30a of the cam 30.
The lever 33 rotates in the counterclockwise direction around the axis P4 in accordance with the clockwise rotation of. When the lever 33 rotates in the counterclockwise direction around the axis P4, the end portion 33c of the lever 33 comes into contact with the working surface 62a of the lever 62 in FIG.
With the counterclockwise rotation, the lever 62 rotates clockwise about the axis P9 against the spring 64, and the lens barrier 5
Rotates in the opening direction. Further, in FIG. 3, when the lever 33 rotates counterclockwise around the axis P4, the engaged portion 15a of the lever 15 and the engaging portion 33a of the lever 33 are disengaged. The cam surface 33b of the lever 33 is the cam surface 3 of the cam 30.
When the contact with the cam surface 30b is changed to the contact with the cam surface 30b, the rotation of the lever 33 around the axis P4 is completed, and the lens barrier 5 is held at the open position as shown in FIG.

When the braking for the time t1 in step # 103 is completed, the process proceeds to step # 104, and the motor 11 is energized in the normal direction. In FIG. 9, when the motor 11 rotates in the normal direction, the gear 12 rotates counterclockwise, the gears 13 and 14 rotate clockwise, and the lever 15 rotates clockwise around the axis P1 as shown in FIG. Like planetary gear 16
Is engaged with the planetary gear 34 away from the engagement with the gear 17. When the motor 11 is further energized in the normal direction, the normal rotation of the motor 11 is transmitted to the gear 38 via the gear 12, the gear 13, the gear 14, the planetary gear 16, and the planetary gear 34.
The gear 38 rotates counterclockwise, the encoder 39 formed integrally with the gear 38 rotates, and the pulse AP is output. When the gear 38 rotates counterclockwise, the rotation transmission shaft 51 that rotates integrally with the gear 38 rotates counterclockwise, and the linear movement member 55 moves downward in FIG. 16a. When the main switch is off, the lens barrel 3 is in the retracted position, and the SW6 is on at this time, but when the rectilinear movement member 55 moves downward, SW6 changes to the off state. In step # 105, it is waiting for SW6 to turn off, and when SW6 turns off, step # 10
Waiting for SW6 to turn from OFF to ON. During this time, in FIG. 12, the lens barrel 3 is moved forward of the optical axis of the camera via the worm 52, the worm wheel 53, and the feed screw 54. Also, when the rectilinear moving member 55 moves downward, the rectilinear moving member 5 in FIG.
The projecting portion 65a of the rectilinear movement member 65 that is in contact with 5 moves downward due to the urging force of the spring 66, and comes into contact with the cam surface 63b of the lever 63 and stops as shown in FIG. 16b. When the rectilinear movement member 55 further moves downward, the protrusion 55
a contacts the cam surface 56c of the lever 56, the lever 56 rotates counterclockwise around the axis P6 while compressing the torsion spring 57, and reaches the neutral point in FIG. 16c. Lever 5
After 6 exceeds the neutral point, 6 is rotated counterclockwise by the release force of the torsion spring 57, and the cam surface 56c and the rectilinear movement member 55 are moved.
The contact with the projecting portion 55a is released. The lever 58 rotates clockwise about the axis P8 by the counterclockwise rotation of the lever 56 by the torsion spring 57, and stops the rotation by contact with a stopper (not shown). Becomes In the state of FIG. 17a, the lever 58 has the locking portion 58b contact the locked portion 15b of the lever 15 as shown in FIG.

The motor 11 continues to be energized in the forward direction, and S
When W6 is turned on again, the routine proceeds to step # 107, and the motor 11 is braked for t2 hours.

Next, when the motor 11 is energized in the reverse rotation direction in step # 108, the gear 14 rotates counterclockwise, and the lever 15 tries to rotate counterclockwise around the axis P1. The locked portion 15b of 15 is the lever 58
Since the lever 15 cannot be rotated in the counterclockwise direction because it is locked to the locking portion 58b, the reverse rotation of the motor 11 causes the gear 38 to pass through the gear 12, the gear 13, the gear 14, the planetary gear 16, and the planetary gear 34. The gear 38 rotates clockwise.

When the gear 38 rotates clockwise, the gear 3
The rotation transmitting shaft 51 that rotates integrally with 8 rotates clockwise, and the worm 52, the worm wheel 53, and the feed screw 5
The lens barrel 3 moves to the rear of the optical axis of the camera via 4.
Further, the straight moving member 55 moves upward, and SW6 also moves to return from the ON state to the OFF section. In step # 109, S
Waiting for W6 to turn off. When SW6 turns off, the process proceeds to step # 110 to brake the motor 11.
Take 2 hours. As a result, SW6 is turned off, and the lens barrel 3 is in the standby position. After braking for t2 hours in step # 110, the motor 11 is operated in step # 111.
To the standby state shown in FIG. 17a at step # 112.

21 and 22 are flowcharts showing the photographing operation. When the photometry SW1 is turned on in the standby state of FIGS. 10, 13 and 17a, the distance to the subject is measured in step # 121, and the amount of extension of the lens barrel (SW7
Is calculated, and the motor 11 is energized in the forward direction in step # 122.
When the motor 11 is energized in the normal direction, the gear 3 in FIG.
8 rotates in the counterclockwise direction, the encoder 39 formed integrally with the gear 38 rotates, and the pulse AP is output.
With the rotation of the gear 38, the rotation transmission shaft 51 also rotates counterclockwise, and the linear movement member 55 moves downward in FIG. 17a.

When the rotation transmitting shaft 51 rotates counterclockwise, the lens barrel 3 moves in the front direction of the camera optical axis via the worm 52, the worm wheel 53, and the feed screw 54 in FIG. When the worm wheel 53 rotates, the SW7 outputs an ON / OFF signal.

In step # 123, it waits for SW6 to turn on, and then in step # 124, waits for SW7 to turn on. When SW7 is turned on, the pulse AP generated by the rotation of the encoder 39 is counted in step # 125. In step # 126, the counted pulse A
Predetermined pulse AP whose P number is calculated in step # 121
Wait for the number. When the counted number of pulses AP reaches a predetermined value, the process proceeds to step # 127, the motor 11 is braked for t3 hours, and the power supply to the motor 11 is stopped in step # 128. As a result, the lens barrel 3 stops at the in-focus position.

Next, in step # 129, the brightness of the subject is measured, the exposure is calculated to calculate the exposure value, and the aperture value and the shutter speed are determined.

In step # 130, it is determined whether the release switch SW2 (not shown) is on or off. If it is off, the process returns to step # 129 to repeat photometry.

If the release switch SW2 is on, the process proceeds to step # 131 to open and close the lens shutter (not shown) incorporated in the lens barrel to expose the film.

When the film exposure operation is completed in step # 131, the process proceeds to step # 132, and the motor 11 is energized in the reverse direction. According to the rotation of the motor 11, the gear 12 of FIG.
4 rotates counterclockwise. When the gear 14 rotates counterclockwise, the lever 15 tries to rotate counterclockwise around the axis P1, but the locked portion 15b of the lever 15 is locked by the locking portion 58b of the lever 58. For lever 15
Cannot rotate counterclockwise and the reverse rotation of the motor 11 causes the gear 1
2, gear 13, gear 14, planetary gear 16, planetary gear 34
To the gear 38, and the gear 38 rotates in the clockwise direction. When the gear 38 rotates clockwise, the rotation transmission shaft 51 that rotates integrally with the gear 38 rotates clockwise,
The lens barrel 3 moves rearward of the optical axis of the camera via the worm 52, the worm wheel 53, and the feed screw 54. Also, when the rotation transmission shaft 51 rotates clockwise, as shown in FIG.
In, the linear movement member 55 moves upward. Then, when the SW6 provided on the straight-moving member 55 is changed from on to off and the motor 11 is continuously energized in the reverse direction, the protrusion 55a of the straight-moving member 55 moves upward, and the cam of the lever 56 moves. Abutting on the surface 56b, the lever 56 rotates clockwise about the axis P6 while compressing the torsion spring 57, and reaches the neutral point in FIG. 17b. Lever 56
After the neutral point is exceeded, it is rotated clockwise by the release force of the torsion spring 57, and abuts on a stopper (not shown).
The rotation is stopped in the state shown in 7C. The rotation of the lever 56 causes the lever 58 to rotate in the counterclockwise direction, and the locking portion 58.
b retracts from the locking position of the locking portion 15b of the lever 15.

Therefore, the lever 15 can rotate in the counterclockwise direction about the axis P1, the planetary gear 16 moves from the meshing position with the planetary gear 34, and the gear 17 as shown in FIG.
Mesh with. On the other hand, since the meshing between the planetary gear 34 and the planetary gear 16 is disengaged, the planetary gear 34 stops and the lens barrel 3 also stops.

When the planetary gear 16 meshes with the gear 17, the gears 17 and 18 rotate counterclockwise and the lever 19 also rotates counterclockwise so that the planetary gear 20 meshes with the gear 28 and meshes with the gear 28. The rotating gear 29 rotates clockwise. When the gear 29 rotates clockwise, the cams 30,
The cams 31 and 32 also rotate clockwise, and the combination of ON / OFF of SW3, SW4, and SW5 (not shown) provided on the gear 29 changes. In step # 133,
When it is detected that the cam 30, the cam 31, and the cam 32 are located in the winding section shown in FIG. 3 based on the outputs of the SW3, SW4, and SW5, the process proceeds to step # 134 and the motor 1
Apply 1 to brake for t1 hours.

The operation in step # 133 will be described below.
In FIG. 9, when the cam 30 rotates clockwise, the cam 3
The cam surface 30b of 0 and the cam surface 33b of the lever 33 are disengaged from each other, the lever 33 is rotated clockwise about the axis P4 by a spring force (not shown), and the lever 33 is in the state of FIG.
The locking portion 33 a of the lever 33 is the locked portion 15 of the lever 15.
Contact a. At this time, since the lever 33 rotates clockwise around the axis P4, the contact between the end portion 33c of the lever 33 and the working surface 62a of the lever 62 is released, and the lever 63 also does not rotate around the axis P10 in FIG. 16c. 17C, the lens barrier 5 tries to move in the closing direction, but the cam surface 63b of the lever 63 comes into contact with the protrusion 65a of the rectilinear movement member 65 in FIG. 17c. By this, the clockwise rotation of the lever 63 about the axis P10 is blocked, and the lens barrier 5 does not come into contact with the lens barrel 3 protruding from the front surface of the camera.

When the motor 11 is energized in the forward rotation direction in step # 135 after the braking for t1 time in step # 134, the lever 15 tries to rotate clockwise about the axis P1. Stop 33a is lever 1
Since the locked portion 15a of No. 5 is locked, the lever 15 cannot rotate clockwise about the axis P1, the planetary gear 16 remains engaged with the gear 17, and the gear 17 rotates clockwise. To do. When the gear 17 rotates clockwise, the lever 1
9 rotates in the clockwise direction around the axis P2, the planetary gear 20 meshes with the disengagement gear 21 from meshing with the gear 28, and the spool 6 rotates counterclockwise. A film drawn from a cartridge (not shown) is wound around the spool 6, and the film is further drawn from the cartridge by the counterclockwise rotation of the spool 6 and wound around the spool. At this time, a film feed detection unit (not shown) generates a pulse SP corresponding to the perforation of the film, and the amount of movement of the film is detected. Step # 136
This pulse SP is counted in step # 137, and when the count number of pulse SP reaches a predetermined value (feeding one frame) in step # 137, the process proceeds to step # 138 and the motor 11 is braked for t4 hours to feed one frame of film. Complete the sending.

Next, in step # 139, the motor 11 is energized in the reverse direction. In response to the rotation of the motor 11, the gear 17 rotates counterclockwise and the lever 19 rotates counterclockwise around the axis P2, so that the planetary gear 20 meshes with the gear 28 apart from the mesh with the gear 21. The gear 28 rotates counterclockwise and the gear 29 rotates clockwise.
The gear 29 rotates in the clockwise direction, and from the film winding section shown in FIG. 3, the film rewinding section of FIG. 5, the collapsing section of FIG.
1. When the position of the cam 32 is detected in step # 140, the process proceeds to step # 141, and the motor 11 is braked for t1 hours.

The main operation in step # 140 will be described. When the gear 29 rotates clockwise, the cam 30 integrated with the gear 29 rotates clockwise, and the cam surface 33b of the lever 33 abuts the cam surface 30a of the cam 30.
The lever 33 rotates in the counterclockwise direction around the axis P4 in accordance with the clockwise rotation of. In FIG. 3, when the lever 33 rotates about the axis P4 in the counterclockwise direction, the locked portion 1 of the lever 15 is rotated.
5a and the engaging portion 33a of the lever 33 are disengaged. Further, in step # 133, since the protrusion 65a of the rectilinear movement member 65 and the cam surface 63b of the lever 63 are in contact with each other, the lens barrier 5 is held in the open state, so that the end 33c of the lever 33 is , Cam surface 3 of lever 33
3b moves from the cam surface 30a of the cam 30 to the contact of the cam surface 30b, and when the rotation of the lever 33 around the axis P4 is completed,
The open state of the lens barrier 5 is maintained by contacting the working surface 62a of the lever 62.

When the braking for the time t1 in step # 141 is completed, the process proceeds to step # 142 to energize the motor 11 in the normal direction. After that, the process proceeds to step # 106 of FIG.

FIG. 23 is a flowchart showing the operation when SW1 is off without turning on SW2 after turning on SW1.

When the photometry SW1 is turned on, the process proceeds from step # 121 to step # 129 as shown in the description of the photographing operation in FIG. 21, the lens barrel 3 is stopped at the in-focus position, and the release SW2 is reached in step # 130. Is waiting to turn on. At this time, S2 without turning on SW2
When W1 turns off, an interrupt occurs, and step # 15
In step 1, the motor 11 is energized in the reverse direction. When the motor 11 is energized in the reverse direction, the gear 12 in FIG.
Rotates clockwise, and the gears 13 and 14 rotate counterclockwise. When the gear 14 rotates counterclockwise, the lever 15 tries to rotate counterclockwise around the axis P1, but the locked portion 15b of the lever 15 is locked by the locking portion 58b of the lever 58. Therefore, the lever 15 cannot rotate counterclockwise, and the reverse rotation of the motor 11 causes the gear 12 and the gear 1 to rotate.
3, transmitted to the gear 38 via the gear 14, the planetary gear 16, and the planetary gear 34, and the gear 38 rotates clockwise. When the gear 38 rotates clockwise, the rotation transmitting shaft 51 that rotates integrally with the gear 38 rotates clockwise, and the worm 5
2, the lens barrel 3 moves rearward of the camera optical axis via the worm wheel 53 and the feed screw 54. When the rotation transmission shaft 51 rotates clockwise, the linear movement member 55 moves upward in FIG. 17a. Then, the SW6 provided on the straight-moving member 55 changes from on to off. In step # 152, the process waits until SW6 is turned off. When SW6 is turned off, the process proceeds to step # 153, the motor 11 is braked for t2 hours, and the lens barrel 3 is set to the standby position.

FIG. 24 is a flow chart showing the film rewinding operation. When the film rewind switch SREW is turned on in the standby state of FIGS. 10, 13 and 17a, the process proceeds to step # 171, and the motor 11 is energized in the reverse direction. In response to the rotation of the motor 11, the gear 12 in FIG. 10 rotates clockwise, and the gears 13 and 14 rotate counterclockwise. When the gear 14 rotates counterclockwise, the lever 15 tries to rotate counterclockwise around the axis P1, but the locked portion 15b of the lever 15 is locked by the locking portion 58b of the lever 58. Therefore, the lever 15 cannot rotate counterclockwise, and the reverse rotation of the motor 11 is transmitted to the gear 38 via the gear 12, the gear 13, the gear 14, the planet gear 16, and the planet gear 34, and the gear 38 rotates clockwise. Rotate. When the gear 38 rotates in the clockwise direction, the rotation transmission shaft 51 that rotates integrally with the gear 38 rotates in the clockwise direction, and the lens barrel 3 is moved to the rear of the camera optical axis via the worm 52, the worm wheel 53, and the feed screw 54. Move in the direction. Also,
When the rotation transmitting shaft 51 rotates clockwise, the linear movement member 55 moves upward in FIG. 17a. In response to this movement, the protrusion 55a of the linear movement member 55 abuts on the cam surface 56b of the lever 56, and the lever 56 rotates clockwise about the axis P6 while compressing the torsion spring 57, and the neutral point in FIG. Welcome. After the lever 56 has passed the neutral point, the release force of the torsion spring 57 rotates the lever 56 clockwise to the position shown in FIG. 17c. At this time, the lever 58 is shown in FIG.
In the state shown in c, the engagement between the engagement portion 58b and the engagement portion 15b of the lever 15 is released. Therefore, the lever 15 can rotate counterclockwise around the axis P1, the planetary gear 16 is disengaged from the mesh with the planetary gear 34, and meshes with the gear 17 as shown in FIG. Further, since the meshing between the planetary gear 34 and the planetary gear 16 is disengaged, the planetary gear 34
Stops and the lens barrel 3 stops.

When the planetary gear 16 meshes with the gear 17, the gear 17 and the gear 18 rotate counterclockwise and the lever 19 also rotates counterclockwise so that the planetary gear 20 meshes with the gear 28 and the gear 28 counteracts. The gear 29, which rotates in the clockwise direction and meshes with the gear 28, turns in the clockwise direction. When the gear 29 rotates in the clockwise direction, the cam 30, the cam 31, and the cam 32 also rotate in the clockwise direction, and the SW (not shown) provided on the gear 29.
The combination of ON / OFF of 3, SW4 and SW5 changes. At step # 172, the on / off combination of SW3, SW4, and SW5 is waiting for the rewinding section, and when the cam 30, cam 31, and cam 32 enter the rewinding section, the process proceeds to step # 173. Apply the brake to 11 for t1 hour.

The operation in step # 172 will be described below.
In FIG. 9, when the cam 30 rotates clockwise, the cam 3
The cam surface 30b of 0 and the cam surface 33b of the lever 33 are disengaged from each other, the lever 33 is rotated clockwise around the axis P4 by a spring force (not shown), and the lever 33 is in the state of FIG.
The locking portion 33 a of the lever 33 is the locked portion 15 of the lever 15.
Contact a. At this time, since the lever 33 rotates clockwise around the axis P4, the end portion 33c of the lever 33 and the working surface 62a of the lever 62 are disengaged, and the lever 63 also rotates around the axis P10 in FIG. 16c. The lens barrier 5 tries to move in the closing direction by being rotated in the clockwise direction by the urging force of the lever 64, but the cam surface 63b of the lever 63 is in contact with the protruding portion 65a of the rectilinear movement member 65. The rotation of the lens barrel 5 around the axis P10 is blocked, and the lens barrier 5 projects from the front surface of the camera.
Never abut. When the cam 31 rotates clockwise, the contact between the cam surface 31a of the cam 31 and the cam surface 25b of the lever 25 is released, and the lever 25 is moved around the axis P3 by the spring force (not shown) to the position shown in FIG. Is rotated counterclockwise, and the planetary gear 26 meshes with the gear 18.

When the motor 11 is energized in the forward rotation direction in step # 174 after the braking for t1 time in step # 173, the lever 15 tries to rotate clockwise about the axis P1, but the lever 33 is locked. Part 33a is lever 1
5, the lever 15 cannot rotate clockwise about the axis P1, the planetary gear 16 remains meshed with the gear 17, and the gear 17 rotates clockwise. . When the gear 17 rotates clockwise, the lever 1
9 rotates in the clockwise direction around the axis P2, the planetary gear 20 is disengaged from the gear 28 and tries to mesh with the gear 21, but the engaging portion 25a of the lever 25 causes the lever 19 to move.
Since the locked portion 19a of the lever 19 is within the turning radius of the locked portion 19a, the locked portion 19a of the lever 19 contacts the locking portion 25a of the lever 25, so that the planetary gear 20 does not mesh with the gear 21. Therefore, the clockwise rotation of the gear 18 causes the planet gear 2 to rotate.
6, the rotation of the planetary gear 26 is transmitted to the gear 27, and the rotation of the gear 27 is transmitted to the gear 8 via a gear train (not shown). Therefore, when the gear 27 rotates clockwise, The rewinding fork 7 rotates, and the film is rewound on the cartridge.

In step # 175, the number of pulses SP generated from the film feed detector is counted, and in step # 176
Wait until the pulse SP count reaches a predetermined value C (the amount of film fed out), and when the pulse SP count reaches the predetermined value C, the process proceeds to step # 177 and the motor 11 is braked for t4 hours. , The film rewinding is completed.

After braking for t2 hours in step # 177, the process proceeds to step # 139 in FIG. 22, further proceeds to step # 106 in FIG. 20, and the standby state is set in step # 112.

FIG. 25 is a flow chart showing the operation when the main switch is off. When the main switch SW8 (not shown) is turned off in the standby state of FIGS. 10, 13 and 17a, an interrupt occurs and the process proceeds to step # 191 to energize the motor 11 in the reverse direction. When the motor 11 is energized in the reverse direction, the gear 12 in FIG. 10 rotates clockwise and the gears 13 and 14 rotate counterclockwise.
When the gear 14 rotates counterclockwise, the lever 15 moves to the axis P.
Attempt to rotate 1 turn counterclockwise, but lever 15
Since the locked portion 15b of the lever is locked to the locking portion 58b of the lever 58, the lever 15 cannot rotate counterclockwise,
The reverse rotation of the motor 11 is transmitted to the gear 38 via the gear 12, the gear 13, the gear 14, the planetary gear 16, and the planetary gear 34, and the gear 38 rotates clockwise. When the gear 38 rotates in the clockwise direction, the rotation transmission shaft 51 that rotates integrally with the gear 38 rotates in the clockwise direction, and the lens barrel 3 is moved to the rear of the camera optical axis via the worm 52, the worm wheel 53, and the feed screw 54. Move in the direction. Further, when the rotation transmission shaft 51 rotates clockwise, in FIG.
Moves upward. When the motor 11 is further energized in the reverse direction, the protrusion 55a of the linear movement member 55 moves upward and contacts the cam surface 56b of the lever 56, and the lever 56 rotates the shaft P6 while compressing the torsion spring 57. Is rotated clockwise to reach the neutral point in FIG. 17b. After the lever 56 has passed the neutral point, it is rotated clockwise by the release force of the torsion spring 57 and stopped at the position shown in FIG. 17c.

In the state of FIG. 17c, the locking portion 58b of the lever 58 and the locked portion 15b of the lever 15 are released from each other, and the lever 15 is rotatable about the axis P1 in the counterclockwise direction. When the lever 15 rotates counterclockwise, the planetary gear 16 disengages from the planetary gear 34 and meshes with the gear 17 as shown in FIG. Due to the disengagement with the planetary gear 16, the rotation of the planetary gear 34 stops and the lens barrel 3 stops.

When the planetary gear 16 meshes with the gear 17, the gear 17 and the gear 18 rotate counterclockwise, the lever 19 rotates counterclockwise, the planetary gear 20 meshes with the gear 28, and the gear 28 counteracts. It rotates clockwise, and the gear 29 meshing with the gear 28 rotates clockwise. When the gear 29 rotates clockwise, the cam 30, the cam 31, and the cam 32 also rotate clockwise, and the SW (not shown) provided on the gear 29
The combination of ON / OFF of 3, SW4 and SW5 changes. In step # 192, the on / off combination of SW3, SW4, and SW5 is waiting for the retractable section. When the cam 30, cam 31, and cam 32 enter the retractable section, the process proceeds to step # 193 and the motor 11 is operated. Apply the brake for t1 hour.

The main operation in step # 192 will be described. When the gear 29 rotates clockwise and the cam 32 also rotates clockwise from the state of FIG. 9, the end portion 35 of the lever 35 is rotated.
a and the cam surface 32a of the cam 32, the lever 35
Rotates clockwise against a spring force (not shown), and the planetary gear 34 and the gear 38 are disengaged from each other. On the other hand, when the gear 29 rotates in the clockwise direction and the cam 32 rotates in the clockwise direction from the state of FIG. 9, the lever 35 rotates in the clockwise direction against the spring force (not shown), and the end surface 35b of the lever 35 is removed. Due to the contact of the shaft 40 provided on the lever 37, the lever 37 rotates counterclockwise around the shaft P5 and the planetary gear 36 starts to mesh with the gear 34. When the gear 29 rotates clockwise and the end portion 35a of the lever 35 contacts the cam surface 32b of the cam 32, the planetary gear 36 meshes with the planetary gear 34 in a communicable state. The end portion 35a of the lever 35 is connected to the cam 32.
When it comes into contact with the cam surface 32b of the above, the clockwise rotation of the lever 35 around the axis P4 is completed in the state shown in FIG.

After the braking for t1 time in step # 193, when the motor 11 is energized in the normal direction in step # 194, the gear 12 rotates counterclockwise and the gears 13 and 14 rotate clockwise, The lever 15 rotates in the clockwise direction around the axis P1, and the planetary gear 16 meshes with the planetary gear 34 away from the mesh with the gear 17, as shown in FIG.
When the motor 11 further rotates, the normal rotation of the motor 11 is transmitted to the gear 38 via the gear 12, the gear 13, the gear 14, the planet gear 16, the planet gear 34, and the planet gear 36, and the gear 38 rotates clockwise. . When the gear 38 rotates clockwise, the rotation transmission shaft 51 that rotates integrally with the gear 38 rotates clockwise, and the worm 52 and the worm wheel 5
3. The lens barrel 3 moves rearward of the optical axis of the camera via the feed screw 54. When the rotation transmission shaft 51 rotates clockwise, the linear movement member 55 moves upward in FIG. 17c. When the straight-moving member 55 moves upward,
In FIG. 16 b, it abuts on the linear movement member 65, and both move upward while resisting the spring 66. At this time, the contact between the protruding portion 65a of the rectilinear movement member 65 and the cam surface 63b of the lever 63 is released. Further, when the straight-movement member 55 moves upward, the SW6 provided on the straight-movement member 55 changes from the off state to the on state. When the SW6 is turned on, the lens barrel 3 is in the retracted position, and step # 195
Then, waiting for SW6 to be turned on, and when SW6 is turned on, the routine proceeds to step # 196, and the motor 11 is braked for t6 hours. As a result, the lens barrel 3 is stored in the camera body.

Next, at step # 197, the motor 11 is energized in the reverse direction. When the motor 11 is energized in the reverse direction, the gear 12 rotates clockwise, and the gear 13 and the gear 14 are rotated.
Rotates counterclockwise, the lever 15 rotates counterclockwise around the axis P1, the planetary gear 16 meshes with the gear 17 apart from the meshing with the planetary gear 34, and the gear 17 rotates counterclockwise. Then, since the lever 19 rotates in the counterclockwise direction about the axis P2, the planetary gear 20 meshes with the gear 28, and the gear 28 rotates counterclockwise. When the gear 28 rotates counterclockwise, the gear 29 rotates clockwise. Gear 2
When 9 rotates clockwise, the states of SW3, SW4, and SW5 change, and the cam section is switched. Cam 3 in Figure 7
0, the cam 31, the cam 32, and the states of SW3, SW4, and SW5 are the retracting section, but when the gear 29 rotates clockwise, the cam 30 and the cam 30 in the winding section of FIG. 31, cam 32 and SW3, SW
4, SW5 state. SW3 in step # 198
If it is detected by SW4 and SW5 that the cam 30, cam 31, and cam 32 have reached the winding section, step # 1
Proceeding to 99, the motor 11 is braked for t1 hour, the power supply to the motor 11 is stopped in Step # 200, and Step # 200
At 201, a standby state is established in which the main switch SW8 is turned on.

The operation in step # 198 will be described below.
In FIG. 7, when the cam 30 rotates clockwise, the cam 3
The contact between the cam surface 30b of 0 and the cam surface 33b of the lever 33 is released, and the lever 33 rotates clockwise around the axis P4,
The state shown in FIG. 3 is brought into contact with a stopper (not shown), and the locking portion 33a of the lever 33 comes into contact with the locked portion 15a of the lever 15. At this time, the lever 33 rotates clockwise about the axis P4, so that the end portion 33c of the lever 33 and the lever 62 are rotated.
15, the lever 62 rotates in the counterclockwise direction around the axis P9 by the urging force of the spring 64, and the lens barrier 5 moves in the closing direction to the closed position in FIG. The lens barrel 3 is protected as shown in FIG.

[0077]

As described above, in the present invention,
The drive switching mechanism switches the drive transmission state of the second transmission mechanism so that the second transmission mechanism can transmit the driving force when the first transmission mechanism is in the open position of the barrier. It is possible to reliably prevent the contact.

[Brief description of drawings]

FIG. 1 is a front view of a camera.

FIG. 2 is a bottom view of the camera.

FIG. 3 is a plan view of a main drive unit.

FIG. 4 is a plan view of a main drive unit.

FIG. 5 is a plan view of a main drive unit.

FIG. 6 is a plan view of a main drive unit.

FIG. 7 is a plan view of a main drive unit.

FIG. 8 is a plan view of a main drive unit.

FIG. 9 is a plan view of a main drive unit.

FIG. 10 is a plan view of a main drive unit.

FIG. 11 is a front view showing a lens driving mechanism.

FIG. 12 is a top view showing a lens driving mechanism.

FIG. 13 is a top view showing a lens driving mechanism.

FIG. 14 is a front view showing a barrier drive mechanism.

FIG. 15 is a front view showing a barrier drive mechanism.

FIG. 16 is a front view showing a lens driving mechanism.

FIG. 17 is a front view showing a lens driving mechanism.

FIG. 18 is a state diagram of signals generated when the lens moves.

FIG. 19 is a circuit diagram of a circuit that controls a camera.

FIG. 20 is a flowchart showing an operation when a main switch is turned on.

FIG. 21 is a flowchart showing a shooting operation.

FIG. 22 is a flowchart showing a shooting operation.

FIG. 23 is a flowchart showing an interrupt operation when the photometric switch is turned off without the release switch being turned on after the photometric switch is turned on.

FIG. 24 is a flowchart showing a film rewinding operation.

FIG. 25 is a flowchart showing an operation when a main switch is turned off.

[Explanation of symbols]

 1: Main drive part 3: Lens barrel 5: Lens barrier 11: Motor 15: Lever 16: Planetary gear 30, 32: Cam 33: Lever 33a: Locking part 34: Planetary gear 35: Lever 36: Planetary gear 38: Gear 62: Lever

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Tanii 2-3-13 Azuchicho, Chuo-ku, Osaka Osaka International Building Minolta Co., Ltd.

Claims (1)

[Claims] 1. A camera in which a lens can be retracted, the lens being movable in an optical axis direction, and a closed position for covering the lens when the lens is retracted and an open position retracted from a movement path of the lens. Possible barrier (5) and motor (1
1) and a drive transmission mechanism (1) for transmitting the drive force of the motor to drive the lens and the barrier, the drive transmission mechanism transmitting the drive force of the motor to drive the barrier. A first transmission mechanism (30, 33, 62), a second transmission mechanism (16, 34, 36, 38) that transmits the driving force of the motor for driving the lens, and the first transmission mechanism is the barrier. Is in the open position, the drive switching mechanism (15, 15) for switching the driving force transmission state of the second transmission mechanism by the driving force of the motor so that the second transmission mechanism can transmit the driving force. Three
2, 33a, 35).