JPH10333243A - Electronic still camera also using silver salt film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically and quickly execute switching operation when an optical object image obtained by a photographing lens optical system is photographed by selectively switching to either a silver salt film or a photoelectric conversion image pickup sensor. SOLUTION: The photoelectric conversion image pickup sensor 38 is integrated in a movable assembly 22 freely moved in a back-and-forth direction along the optical axis of the photographing optical system. Then, the silver salt film is held by the assembly 22. The assembly 22 is selectively moved between a first photographing position and a second photographing position. When the assembly 22 is set at the first photographing position by a solenoid actuator, the recording surface of the silver salt film is made to coincide with the image forming surface of the photographing optical system. When it is set at the second photographing position by the solenoid actuator, the photodetector surface of the sensor 38 is made to coincide with the image forming surface of the photographing optical system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid camera capable of selectively photographing an optical object image obtained by a photographing optical system on one of a silver halide film and a photoelectric conversion image sensor, that is, a silver halide film. The present invention relates to a combined electronic still camera.

[0002]

2. Description of the Related Art In recent years, an electronic object image is captured by a photoelectric conversion image sensor, pixel signals obtained by the photoelectric conversion image sensor are appropriately processed, and then recorded on a recording medium such as a memory card or a magnetic floppy disk. Still cameras have attracted attention, but hybrid cameras that can selectively photograph an optical object image obtained by a photographing optical system on one of a silver halide film and a photoelectric conversion imaging sensor, that is, a dual use of a silver halide film Electronic still cameras have also been developed.

[0003] As an example of a conventional electronic still camera combined with a silver halide film, there is known one in which two units can be detachably attached to the inside of a back cover of the camera body. That is, one unit is a pressure plate unit having a silver salt film pressure plate, and the other unit is an electronic image pickup unit having a photoelectric conversion image sensor. One of these two units is mounted inside the back cover. Thus, such a camera is used as a normal photographic camera or as an electronic still camera.

[0004]

However, in such a conventional electronic camera combined with a silver halide film, every time one of the photographing camera and the electronic still camera is switched to the other, the operation of replacing the pressure plate unit and the electronic imaging unit is performed. Accordingly, such an exchange operation becomes very complicated.

Accordingly, an object of the present invention is to provide a hybrid camera, that is, a silver halide film capable of selectively photographing an optical object image obtained by a photographing optical system on one of a silver halide film and a photoelectric conversion image sensor. An object of the present invention is to provide a dual-purpose electronic still camera which does not require any complicated exchange operation as in the related art.

[0006]

The electronic still camera combined with a silver halide film according to the present invention can selectively capture an optical object image obtained by an imaging optical system on one of a silver halide film and a photoelectric conversion image sensor. A movable assembly movable in the front-rear direction along the optical axis defined by the imaging optical system, and the movable assembly being moved between a first imaging position and a second imaging position. And selective positioning drive means for selectively moving between them.
The movable assembly is provided with a restraining means for restraining the silver halide film at a predetermined position, and a transparent pressure plate which cooperates with the restraining means to define a recording surface of the silver halide film at a predetermined surface position. The photoelectric conversion image sensor is incorporated in the assembly on the rear side of the transparent pressure plate. When the movable assembly is positioned at the first photographing position by the selective positioning drive means, the recording surface of the silver halide film is made to coincide with the imaging surface of the photographing optical system, and the movable assembly is moved by the selective positioning drive means. Second
, The light receiving surface of the photoelectric conversion image sensor is made to coincide with the image forming surface of the imaging optical system.

According to the present invention, preferably, the movable assembly comprises a first sub-assembly and a second sub-assembly, the first sub-assembly being located in front of the second sub-assembly. Be placed.
In this case, the first sub-assembly includes the restraining means, and the second sub-assembly includes the transparent pressure plate and the photoelectric conversion image sensor.

[0008] Where the movable assembly comprises a first subassembly and a second subassembly, the first subassembly is preferably resiliently biased relative to the second subassembly. And first elastic spring means for resiliently biasing the second subassembly relative to the first subassembly, thereby providing first and second elastic assembly means. Are resiliently biased to abut each other and are moved together by a selective positioning drive.

According to the present invention, preferably, the movable assembly is provided with film detecting means for detecting the presence or absence of a silver halide film, and when the presence of the silver halide film is detected by the detecting means, selective positioning is performed. Driving means are driven to position the movable assembly at the first imaging position;
When the presence of the silver halide film is not detected by the detecting means, the selective positioning driving means is driven to position the movable assembly at the second photographing position. More preferably, there is provided positioning detection means for determining whether or not the movable assembly is properly positioned at one of the first imaging position and the second imaging position, and the movable assembly is moved by the positioning detection means. When it is determined that the positioning is not properly performed at any of the first operating position and the second operating position, a photographing operation disabling unit that invalidates the photographing operation command signal is provided.

In accordance with the present invention, preferably, the selective positioning drive means comprises a solenoid actuator having a plunger engaged with the movable assembly, and further comprising a first operating position. The plunger is configured to be selectively driven into and out of a second operating position, and when the plunger is in its first operating position, the movable assembly is positioned in the first imaging position and the plunger is moved to its first position. When the movable assembly is in the second operating position, the movable assembly is positioned at the second photographing position.

In the present invention, the transparent pressure plate can be formed from a transparent plate glass. In this case, the transparent plate glass is preferably provided with infrared shielding plate glass characteristics.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electronic still camera for a silver halide film according to the present invention.

First, referring to FIG. 1, the main internal structure of a silver halide film / electronic still camera according to the present invention is schematically shown. In this embodiment, the silver halide film / electronic still camera is a so-called single-lens reflex camera. Is configured as The electronic camera with a silver halide film includes a camera body 10 and a lens barrel 12 which is detachably mounted substantially at the center of the front side of the camera body 10. An imaging optical system is provided in the lens barrel 12, and an optical axis defined by the imaging optical system is indicated by a dashed line. A back cover 13 is attached to the back side of the camera body 10, and a part of the outline of the back cover 13 is shown by a two-dot chain line in FIG.

A quick return mirror 14 is provided in the camera body 10.
Reference numeral 4 is disposed on the rear side of the lens barrel 12 behind the photographing optical system. The quick return mirror 14 is rotatable between a down position indicated by a solid line, ie, an inclined position, and an up position indicated by a broken line, ie, a horizontal position. Normally, the quick return mirror 14 is located at the down position.
It is rotated from the down position to the up position and stopped at the up position for a predetermined time. The rotation of the quick return mirror 14 can be controlled in a known manner.

A focusing plate 16 is disposed above the quick return mirror 14, and the focusing plate 16 forms a part of a finder optical system indicated by reference numeral 18. When the quick return mirror 14 is at the down position, the optical axis of the photographing optical system of the lens barrel 12 is deflected by the quick return mirror 14 toward the focusing plate 16. That is, an optical object image captured by the imaging optical system of the lens barrel 12 is formed on the focus plate 16, and the optical object image is observed by the photographer through the finder optical system 18.

A shutter 20 is provided on the rear side of the quick return mirror 14. The shutter 20 is opened for a predetermined time in conjunction with the rotation of the quick return mirror 14 from the down position to the up position during a photographing operation. In addition, like the case of the quick return mirror 14,
The opening control of the shutter 20 can be performed in a known manner.

A movable assembly 22 is located behind the shutter 20.
The movable assembly 22 is movable in the front-rear direction over a predetermined range along the optical axis of the photographing optical system of the lens barrel 12. In the present embodiment, the movable assembly 22 includes a first sub-assembly 22A and a second sub-assembly 22B.
The movement of the first sub-assembly 22A is guided by guide means (not shown) provided appropriately in the camera body 10, and the second sub-assembly 22B is
It is guided by guide means (not shown) appropriately provided in the inside.

As best shown in FIG. 2, the first sub-assembly 22A comprises a rectangular frame 24, in the center of which is a rectangular opening 2 defining an exposure area.
6 are formed. A pair of guide rails 28 and 30 are attached to the rear surface of the rectangular frame 24 along the upper and lower edges of the rectangular opening 26. On the rear surface of the rectangular frame 24, three guide pieces 32 are further mounted on the upper side along the upper guide rail 28, and three guide pieces 34 on the lower side along the lower guide rail 30. Is attached. A pair of guide rails 28, 30 and 6
The two guide pieces 32 and 34 function as restraining means for restraining the silver halide film F with respect to the first subassembly.

In the present embodiment, the silver halide film F is stored in a patrone (film cartridge) in the form of a roll, and the patrone is opened by opening the back cover of the camera body 1.
A winding spool (not shown) for the silver halide film F is provided at one side of the inside of the cartridge 0, and at the other side of the side. The silver halide film F withdrawn from the patrone passes through a film path defined by a pair of guide rails 28 and 30 and six guide pieces 32 and 34, and the leading end thereof is engaged with the above-described winding spool. Thereafter, when the back cover 13 is closed, the silver halide film F is restrained and guided by the pair of guide rails 28 and 30 and the six guide pieces 32 and 34 while the rectangular opening 2 is being guided.
6 are moved by one frame at a time, and then sequentially wound by the winding spool described above.

The second sub-assembly 22B includes a transparent pressure plate 36 formed of a suitable transparent plate glass, a photoelectric conversion image sensor 38 mounted behind the transparent pressure plate 36, and an operation of the photoelectric conversion image sensor 38. A control circuit board 40 mounted on the rear side of the photoelectric conversion image sensor 38 for control.
Consisting of As the transparent glass forming the transparent pressure plate 36, a glass exhibiting infrared shielding properties is preferably used. The photoelectric conversion image sensor 38 is configured as an area image sensor from a suitable solid-state image sensor, for example, a CCD (Charge-Coupled Device). The front surface of the photoelectric conversion image sensor 38 is a light receiving surface, and this light receiving surface is brought into close contact with the rear surface of the transparent pressure plate 36.

As is apparent from FIGS. 1 and 2, a suitable elastic spring element, for example, a compression coil spring element 42 acts on each of the four corners on the front face of the rectangular frame 24 of the first subassembly 22A. Therefore, the first sub-assembly 22A is elastically biased with respect to the second sub-assembly 22B. On the other hand, a suitable elastic spring element, for example, a leaf spring element 44 is also applied to the second sub-assembly 22B, so that the second sub-assembly 22B is elastically biased with respect to the first sub-assembly 22A. Let me do. In FIG. 1, the leaf spring element 44 is symbolically shown. In this embodiment, the elastic biasing force of the four compression coil spring elements 42 is made smaller than the elastic biasing force of the leaf spring element 44, so that the movable assembly 22 is always elastically biased forward.

More specifically, each compression coil spring element 42 is restrained between a suitable chassis structure within the camera body 10 and the rectangular frame 24 of the first subassembly 22A, whereby the first The subassembly 22A receives an elastic biasing force toward the second subassembly 22B. On the other hand, a pair of projections (not shown) are provided on the inner wall surface of the back cover 13, and cutout recesses 44 </ b> A are formed at both ends of the leaf spring element 44 so as to receive one of the pair of projections. You. That is, the leaf spring element 44 is mounted in such a manner as to be constrained between the above-mentioned pair of projections.
As shown in the figure, the second sub-assembly 22B is curved in a convex shape toward the second sub-assembly 22B, whereby the second sub-assembly 22B
Of the sub-assembly 22A. Accordingly, the first and second subassemblies 22A and 22B will elastically abut each other, but as described above,
Since the elastic biasing force of the two compression coil spring elements 42 is smaller than the elastic biasing force of the leaf spring element 44, the whole, that is, the movable assembly 22 itself is elastically biased forward.

As is apparent from FIG.
Is formed as a plate material whose both ends are curved, and one curved end is pivotally attached to the camera body 10, whereby the back cover 13 is opened and closed with respect to the camera body 10.

As shown in FIG. 2, the first sub-assembly 22A
A solenoid actuator (SO1, SO2, SO3, SO4) 46 is disposed at each of the four corners on the rear surface of the rectangular frame 24, and each solenoid actuator 46 has a cylindrical housing 48 as shown in FIG. And this cylindrical housing 4
8 and a plunger 52 movably housed within cylindrical housing 48 along its central axis and formed of a suitable magnetic material to cooperate with permanent magnet 50. , And a solenoid 54 disposed around the movement passage of the plunger 52. The cylindrical housing 48 of each solenoid actuator 46 is appropriately fixed and supported by a chassis structure in the camera body 10, and the outer end of the plunger 52 is fixed to the rectangular frame 24 of the first subassembly 22A.

As is apparent from FIG. 3, the inner end face of the plunger 52 is opposed to the N extreme face of the permanent magnet 50, and the plunger 52 has the inner end face of the N magnet of the permanent magnet 50 in accordance with the direction of energization to the solenoid 54. The retracted position (solid line position) in contact with the extreme surface and the inner end face
It is moved between a protruding position (a broken line position) separated from the extreme surface. That is, the plunger 52 is a solenoid 54
One of the retracted position and the protruding position can be selectively taken in accordance with the direction of power supply to the power supply.

More specifically, assuming that the plunger 52 is at the projecting position (broken line position), for example, the solenoid 54
When the current is supplied in the direction indicated by the solid line (the direction of the current is defined as positive current for the sake of convenience), the inner end face of the plunger 52 becomes an S pole, so that the plunger 52 is
Is moved toward the retreat position (solid line position) by the magnetic attraction of
Abuts on the N extreme surface of the permanent magnet 50 and is magnetically attracted thereto, and thus the plunger 52 is positioned at the retracted position. Thereafter, even if the positive energization to the solenoid 54 is turned off, the plunger 52 is maintained in the state of being attracted by the permanent magnet 50 and is stopped at the retracted position.

When the solenoid 54 is energized in the direction shown by the broken line while the plunger 52 is in the retracted position, that is, when reverse energization is performed, the inner end face of the plunger 52 becomes the N pole, 52 receives a magnetic repulsive force from the permanent magnet 50 and is moved from the retracted position to the projected position.

Referring again to FIG. 2, the movable assembly 22A
Four positioning pins 56 are provided on the front side. In the figure, one of the four positioning pins 56 cannot be seen because of the rectangular frame 24. The four positioning pins 56 are provided on the rectangular frame 2 of the first subassembly 22A.
The positioning pins 56 are arranged at positions corresponding to the four corners of the front surface of the camera body 4, and are fixed and supported by a chassis structure in the camera body 10.

The solenoid actuator 46 and the positioning pin 56 described above cooperate with the compression coil spring element 42 and the leaf spring element 44 described above, so that the movable assembly 22 can selectively take two photographing positions. That is, this will be described below with reference to FIGS.

FIGS. 4 (a) and 4 (b) correspond to FIGS. 5 (a) and 5 (b), respectively, and FIGS. 5 (a) and 5 (b) correspond to FIG. 4 (a). 4 and FIG. 4B are partially enlarged views. 4 and 5 do not show some of the components shown in FIG. 2 in order to avoid complicating the drawing, but FIG. 5 shows the structure of the chassis structure in the camera body 10. The state where the solenoid actuator 46 is fixedly supported by the part 58 is shown.

In FIG. 5A, each solenoid actuator 46
Of the plunger 52 is in its retracted position.
As is clear from FIG. 5, the light receiving surface of the silver halide film F is positioned at an image forming plane position defined by the photographing optical system of the lens barrel 12. In short, when the silver halide film is loaded in the electronic still camera combined with the silver halide film according to the present invention, the plungers 52 of the respective solenoid actuators 46 are stopped at the retracted positions, and at this time, the movable assembly 22 is in the first position. A photographing position (a position where photographing is performed on the silver halide film F) is taken.

On the other hand, when the silver halide film F is not loaded in the electronic still camera combined with the silver halide film according to the present invention, or when the silver halide film F is loaded and is rewound to the cartridge. In this case, it is possible to take a picture by the photoelectric conversion image sensor 38. In such a case, the solenoid 54 is moved to move the plunger 52 of each solenoid actuator 46 from the retracted position to the projected position.
Is reversely energized. That is, the plunger 52 is
The movable assembly 22 is moved forward from the retracted position toward the extended position by receiving a magnetic repulsive force from the movable member 22 due to the elastic biasing force of the leaf spring element 44.
As described above, the four compression coil spring elements 42
Is smaller than the elastic biasing force of the leaf spring element 44.

By moving the movable assembly 22 forward,
When the rectangular frame body of the first sub-assembly 22A is brought into contact with the four positioning pins 56, the movable assembly 22
4A from the first photographing position shown in FIG.
It is moved to the second photographing position shown in FIG. 5B and FIG. 5B, and is stopped at the second photographing position by the elastic biasing force of the leaf spring element 44. At this time, the light receiving surface of the photoelectric conversion image sensor 38 is positioned at an image plane position defined by the photographing optical system of the lens barrel 12.

Four solenoid actuators (SO1, SO
(2, SO3, SO4) 46
And four movable assembly detection switches (SW1, SW2, S) on the front side of the movable assembly 22A in order to detect whether or not the positioning to the second photographing position is properly performed.
W3, SW4) 60 are provided. Each of the four movable assembly detection switches 60 is disposed adjacent to the positioning pins 56 at the four corners on the front surface of the rectangular frame 24 of the first sub-assembly 22A. And is fixedly supported by the chassis structure therein. In FIG. 2, one of the four movable assembly detection switches 60 cannot be seen because of the rectangular frame 24 as in the case of the positioning pin 56.

The movable assembly 22 includes a solenoid actuator (SO
(1, SO2, SO3, SO4) 46, the first photographing position (photographing on the silver halide film F) is moved to the second photographing position (photographing on the photoelectric conversion image sensor 38). The sub-assembly 22A comes into contact with the positioning pin 56 and the movable assembly detection switches (SW1, SW2,
SW3, SW4) 60 are turned on. Of course, when the movable assembly 22 is in the first photographing position,
Movable assembly detection switch (SW1, SW2, SW3, S
W4) 60 is turned off.

Here, four solenoid actuators (SO
Movable assembly 2 by (1, SO2, SO3, SO4) 46
The reason why the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are used to detect whether or not the positioning of the second to the first and second photographing positions is properly performed. Stated differently, when the camera body 10 receives an impact, the movable assembly 22 is deviated from the first photographing position, or the first or second movable assembly 22 is moved due to intrusion of dust or the like into the camera body 10. This is because proper positioning to the second shooting position can be hindered.

For example, each solenoid actuator (SO1, S
When the plunger 52 of (O2, SO3, SO4) 46 is in the retracted position, the plunger 52 may be physically released from magnetic attraction to the permanent magnet 50 by an external impact. 52 is displaced toward the projecting position due to the elastic biasing force of the leaf spring element 44, so that the movable assembly 22 is displaced from the first photographing position. When all of the four plungers 52 are physically released from the magnetic attraction to the permanent magnet 50, the movable assembly 22 is originally in the first position.
Should be positioned at the shooting position
Can be moved to the shooting position. On the other hand, if dust or the like that has entered the camera body 10 can impede normal movement of the movable assembly 22, the movable assembly 22 cannot be properly positioned at the first or second photographing position.

Accordingly, assuming that the movable assembly 22 is properly positioned at the first photographing position, the four movable assembly detection switches (SW1, SW2, SW3,
SW4) 60 must be in the off state, and assuming that the movable assembly 22 is properly positioned at the second photographing position, the four movable assembly detection switches (SW1, SW1) SW2, SW3, SW4) 60
Must be all on. Therefore, by monitoring the on / off state of the four movable assembly detection switches 60, it can be determined whether or not the movable assembly 22 is properly positioned at the first or second photographing position.

As shown in FIG. 2, the first
A film detection sensor 62 for detecting the presence of the silver halide film F is incorporated in the subassembly 22A. The film detection sensor 62 is disposed in the film passage on the rear surface of the rectangular frame 24. When the silver halide film F is present in the film path, the film detection sensor 62 outputs, for example, a high level signal, and when the silver halide film F is not present in the film path, it outputs a low level signal.

Referring to FIG. 6, there is shown a block diagram of a silver halide film / electronic still camera according to the present invention, in which components related to the present invention are shown. The system controller 64 is responsible for the overall control of the silver halide film / electronic still camera according to the present invention, and is composed of, for example, a microcomputer. The microcomputer has a central processing unit (CPU) and executes various routines. A read-only memory (ROM) for storing the program and constants, a writable / readable memory (RAM) for temporarily storing data, and an input / output interface circuit (I / O) are provided.

The system controller 64 sends four solenoid actuators (SO1, SO1) through a solenoid drive circuit 66.
(SO2, SO3, SO4) 46 are driven. Also, the system controller 64 turns on / off the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60
An off signal is taken in. Further, the system controller 64 also receives a signal from the film detection sensor 62.

In FIG. 6, reference numeral 67 denotes a back cover open / close detection sensor for detecting the open / close state of the back cover 13 of the camera body 10. The back cover open / close detection sensor 67 is low when the back cover 13 is closed. It outputs a level signal, and outputs a high level signal when the back cover 13 is open. Reference numeral 68 denotes a liquid crystal display (LCD) panel provided, for example, on the upper surface of the camera body 10. The liquid crystal display panel 68 is connected to a system controller 64 via a drive circuit 70 thereof.
Displays camera setting conditions and various messages as necessary. Reference numeral 72 denotes a power on / off switch. The power on / off switch 72 outputs a power on / off signal to the system controller 64. Further, reference numeral 74 denotes a release switch, and a release signal is output to the system controller 64 by the release switch 74.

Referring to FIGS. 7 and 8, there is shown a flowchart of a movable assembly driving routine executed by the system controller 64, and the driving of the movable assembly 22 is controlled according to the movable assembly driving routine. The movable assembly drive routine is an interrupt routine executed at an appropriate time interval, for example, 200 ms.
It is started when the off switch 72 is turned on.

In step 701, it is determined whether or not the back cover 13 is closed. That is, it is determined whether the signal output from the back cover open / close detection sensor 67 is at a low level. If the back cover 13 is open, that is, if the signal from the back cover open / close detection sensor 67 is at a high level, this routine ends immediately. The routine is executed again after 200 ms, but as long as the back cover 13 is open, no progress is made.

When it is confirmed in step 701 that the back cover 13 is closed, the process proceeds from step 701 to step 702, where it is determined whether or not the flag F1 is 0. Since F1 = 0 in the initial stage, the process proceeds to step 703,
Therefore, it is determined whether or not the flag F2 is 0. At the initial stage, since F2 = 0, the process proceeds to step 704, where the presence or absence of the silver halide film F in the movable assembly 22 is determined. That is, in step 704, it is determined whether or not the level of the film detection signal from the film detection sensor 62 is high.

In step 704, the film detection sensor 62
When the level of the film detection signal from the camera is high, that is, when the presence of the silver halide film F in the movable assembly 22 is detected (only photographing on the silver halide film F is possible), the process proceeds to step 705. The on / off of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 is determined (steps 705 to 70).
8). Four movable assembly detection switches (SW1, SW
2, if any one of SW3, SW4) 60 is ON, that is, if the movable assembly 22 is not properly positioned at the first photographing position (photographing on the silver halide film F), the process proceeds to step 709. Then, the release signal is invalidated there. Therefore, at this time, even if the release switch 74 is turned on, the release signal is invalidated. When all of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are on, the movable assembly 22 is in the second imaging position (imaging on the photoelectric conversion imaging sensor 38). In this case, the process also proceeds to step 709.

In step 710, the positive energization of the solenoids 54 of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 is started to position the movable assembly 22 at the first photographing position. Then, Step 7
At 11, the flag F1 and the flag F2 are rewritten to 1 respectively, and this routine ends once.

After 200 ms, this routine is executed again. At this time, since F1 = 1, the process proceeds from step 702 to step 712, where the flag F1 is written back from 1 to 0, and this routine is temporarily terminated. At the time of execution of the next routine, the process proceeds from step 703 to step 713 (F1 = 0, F2 = 1), where the positive energization to the solenoids 54 of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 is turned off. Is done. That is, the positive energization to the solenoid 54 of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 has been performed for 400 ms.

In step 714, the flag F2 is written back from 1 to 0, and then in step 715, it is determined whether the count of the counter N has reached 10 or not. In the initial stage, since N = 0, the process proceeds to step 716, where the count of the counter N is incremented by one, and then the present routine ends once.

When this routine is executed again after 200 ms, the process proceeds from step 701 to step 704 (F1 = 0, F2 = 0), and then again proceeds to step 705, where the four movable assembly detection switches (SW1, SW1) are connected. SW2,
SW3, SW4) ON / OFF of 60 is determined (steps 705 to 708). Solenoid actuator (SO
1, SO 2, SO 3, SO 4) Despite the drive by the positive current, the four movable assembly detection switches (SW)
If any one of (1, SW2, SW3, SW4) 60 is on, that is, if the movable assembly 22 is not properly positioned at the first photographing position, step 709 is performed again.
, Where the release signal is invalidated, and then at step 710, the solenoid actuators (SO1, SO
The positive energization of the solenoid 54 (2, SO3, SO4) 46 is started again, and subsequently, in step 711, the flag F1 and the flag F2 are respectively rewritten to 1.

In short, all four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned off, and it is determined that the movable assembly 22 has been properly positioned at the first photographing position. Up to this point, the drive by the positive energization of the solenoid actuators (SO1, SO2, SO3, SO4) 46 is repeated, and the count of the counter N is incremented by one each time. The solenoid actuators (SO1, SO2, SO3, SO3,
SO4) Even if the driving of 46 is repeated 10 times (N = 10),
Four movable assembly detection switches (SW1, SW2, SW
If not all of the switches 3, 3, SW4) 60 are turned off, the process proceeds to step 717, where a display indicating that photographing is not possible is performed on the liquid crystal display (LCD) panel 68. Note that the count number 10 of the counter N corresponds to a time of 4 seconds.

On the other hand, four movable assembly detection switches (S
If all of W1, SW2, SW3, and SW4) 60 are turned off and it is determined that the movable assembly 22 has been properly positioned at the first photographing position (steps 705 to 708), the process proceeds to step 718. Therefore, the release signal is validated. Therefore, from this point on, when the release switch 74 is turned on for photographing, the release signal is validated, and a series of photographing operations are performed.

In step 719, it is determined whether the count of the counter N is 10 or more. If N <10, the process skips to step 721, the count of the counter N is reset, and the present routine ends once.
Thereafter, this routine is executed every 200 ms, but the presence of the silver halide film F is detected, and the movable assembly detection switches (SW1, SW2, SW3, SW4) 6
As long as all 0s are off, the activation of the release signal is maintained, and the photographing on the silver halide film F is enabled.

In step 717, the liquid crystal display (L
When the power on / off switch 72 is kept on after the display indicating that shooting is not possible is displayed on the CD) panel 68, the solenoid actuators (SO1, SO
2, SO3, SO4) 46 is repeatedly driven by positive current. During this time, all four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned off, and the movable assembly is turned off. In some cases, the solid body 22 can be properly positioned at the first shooting position. For example, even when the movable assembly 22 is not properly positioned at the first photographing position due to the proper movement of the movable assembly 22 being hindered by dust attached to the movable assembly 22, the correct operation of the solenoid actuator 46 is performed. The dust may fall off the movable assembly 22 and be properly positioned at the first photographing position while the drive by the energization is repeated.

Step 719 is prepared for such a situation. If N ≧ 10, a display indicating that photographing is not possible is displayed on the liquid crystal display (LCD) panel 68. As a result, the process proceeds to step 720, where the display is switched to an indication that shooting is possible.

In step 704, the film detection sensor 62
When the level of the film detection signal from is low, that is, when the presence of the silver halide film F in the movable assembly 22 is not detected (only imaging by the photoelectric conversion image sensor 38 is possible), the process proceeds to step 722. ON / OFF of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 is determined (steps 722 to 72).
5). Four movable assembly detection switches (SW1, SW
If any one of the (2, SW3, SW4) 60 is off, that is, if the movable assembly 22 is not properly positioned at the second imaging position (imaging on the photoelectric conversion imaging sensor 38), step 726. , Where the release signal is invalidated. Therefore, as in the case described above, at this time, even if the release switch 74 is turned on, the release signal is invalidated. The four movable assembly detection switches (SW1, SW2, SW3, S
W4) When all of 60 are off, moveable assembly 2
2 is located at the first photographing position (photographing on the silver halide film F).
Go to 6.

In step 727, reverse energization of the solenoids 54 of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 is started to position the movable assembly 22 at the second photographing position. Then, Step 7
At 28, the flag F1 and the flag F2 are rewritten to 1 respectively, and this routine ends once.

After 200 ms, the present routine is executed again. At this time, since F1 = 1, the process proceeds from step 702 to step 712, where the flag F1 is written back from 1 to 0, and the present routine ends once. At the time of execution of the next routine, the process proceeds from step 703 to step 713 (F1 = 0, F2 = 1), where the reverse energization of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 to the solenoid 54 is turned off. Is done. That is, as in the case described above, the four solenoid actuators (SO1, SO2, SO
(3, SO4) Reverse energization of the solenoid 54 to the solenoid 54 is 400 ms.
It was done over.

At step 714, the flag F2 is written back from 1 to 0, and then at step 715, it is determined whether the count of the counter N has reached 10 or not. At this stage, since N = 0, the process proceeds to step 716.
Therefore, the count number of the counter N is incremented by one, and then this routine is temporarily terminated.

When this routine is executed again after 200 ms, the process proceeds from step 701 to step 704 (F1 = 0, F2 = 0), and then again proceeds to step 722, where four movable assembly detection switches (SW1, SW2,
SW3, SW4) ON / OFF of 60 is determined (steps 722 to 725). Solenoid actuator (SO
1, SO2, SO3, SO4) despite the drive by the reverse energization of the four movable assembly detection switches (SW
1, if any one of SW2, SW3, SW4) 60 is off, that is, if the movable assembly 22 is not properly positioned at the second photographing position, step 72 is performed again.
6, where the release signal is invalidated, and then in step 727, the solenoid actuators (SO1, S
O 2, SO 3, SO 4) 46 is reversely energized to the solenoid 54 again, and subsequently, at step 728, the flag F 1
And the flag F2 are respectively rewritten to 1.

In short, all the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned on, and it is determined that the movable assembly 22 has been properly positioned at the second photographing position. Up to this point, the drive by the reverse energization of the solenoid actuators (SO1, SO2, SO3, SO4) 46 is repeated, and the count number of the counter N is incremented by one each time. The solenoid actuators (SO1, SO2, SO3, SO3,
SO4) Even if the driving of 46 is repeated 10 times (N = 10),
Four movable assembly detection switches (SW1, SW2, SW
If not all of the switches 3, 3, SW4) 60 are turned on, the process proceeds to step 717 as in the case described above, where a display indicating that photographing is impossible is performed on the liquid crystal display (LCD) panel 68.

On the other hand, four movable assembly detection switches (S
When all of W1, SW2, SW3, SW4) 60 are turned on and it is determined that the movable assembly 22 has been properly positioned at the second photographing position (steps 722 to 725), the process proceeds to step 718. Therefore, the release signal is validated. Therefore, from this point on, when the release switch 74 is turned on for photographing, the release signal is validated, and a series of photographing operations are performed.

In step 719, it is determined whether or not the count number of the counter N is 10 or more. If N <10, the process skips to step 721, the count of the counter N is reset, and the present routine ends once.
Thereafter, this routine is executed every 200 ms, but the presence of the silver halide film F is not detected, and the movable assembly detection switches (SW1, SW2, SW3, SW4)
As long as all 60 are on, the activation of the release signal is maintained, and imaging on the photoelectric conversion image sensor 38 is enabled.

As in the case described above, after the indication that photography is not possible is displayed on the liquid crystal display (LCD) panel 68 in step 717, and the power on / off switch 72 is kept on, , Solenoid actuator (SO
1, SO2, SO3, SO4) 46 is repeatedly driven by the reverse energization, during which the four movable assembly detection switches (SW1, SW2, SW3, SW4)
In some cases, all 60 may be in the ON state and the movable assembly 22 may be properly positioned at the second imaging position. In this case, since N ≧ 10 in step 719, the process proceeds to step 720, where the display indicating that shooting is not possible is switched to the display indicating that shooting is possible.

[0065]

As is apparent from the above description, the electronic still camera combined with a silver halide film according to the present invention has:
If the silver halide film is loaded in a photographable state, the movable assembly is automatically positioned at a position where photographing on the silver halide film is possible, while if the photographing on the silver halide film cannot be performed, Since the movable assembly is automatically positioned at a position where an image can be captured by the photoelectric conversion imaging sensor, the switching from one of the photographic camera and the electronic still camera to the other can be performed automatically and promptly.

[Brief description of the drawings]

FIG. 1 is a schematic view schematically showing a main part of a silver halide film / electronic still camera according to the present invention.

FIG. 2 is an exploded perspective view showing a movable assembly incorporated in a silver halide film / electronic still camera according to the present invention.

FIG. 3 is a schematic diagram showing a schematic configuration of a solenoid actuator for driving the movable assembly of FIG. 2;

FIG. 4 is a comparison between a silver halide film / electronic still camera when the movable assembly is positioned at a first shooting position and a silver halide film / electronic still camera when the movable assembly is positioned at a second shooting position. FIG.

FIG. 5 is a schematic view showing a main part of FIG. 4 in a partially enlarged manner and comparing the same with that of FIG. 4;

FIG. 6 is a block diagram of an electronic still camera combined with a silver halide film according to the present invention.

FIG. 7 is a part of a flowchart showing a movable assembly driving routine.

FIG. 8 is the remaining part of the flowchart showing the movable assembly driving routine.

[Explanation of symbols]

 Reference Signs List 10 camera body 12 lens barrel 13 back cover 22 movable assembly 22A first sub-assembly 22B second sub-assembly 24 rectangular frame 26 rectangular opening 28 upper guide rail 30 lower guide rail 32, 34 Guide piece 36 Transparent pressure plate 38 Photoelectric conversion imaging sensor 40 Control circuit board 42 Compression coil spring element 44 Leaf spring element 46 Solenoid actuator 56 Positioning pin 60 Moving assembly detection switch 62 Film detection sensor 64 System controller 66 Solenoid drive circuit 67 Back cover Open / close detection sensor 68 Liquid crystal display (LCD) panel 72 Power on / off switch 74 Release switch F Silver halide film

Claims (8)

[Claims] 1. An electronic still camera combined with a silver halide film, wherein an optical object image obtained by an imaging optical system can be selectively photographed on one of a silver halide film and a photoelectric conversion image sensor. A movable assembly movable in the front-rear direction along an optical axis defined by the imaging optical system; and for selectively moving the movable assembly between a first imaging position and a second imaging position. Selective movement driving means, wherein the movable assembly has a restraining means for restraining the silver halide film at a predetermined position, and cooperating with the restraining means, the recording surface of the silver halide film is a predetermined surface. A transparent pressure plate defining a position, and the photoelectric conversion imaging sensor is incorporated in the movable assembly on the rear side of the transparent pressure plate. The movable assembly is moved to the first position by the selective positioning drive means. When positioned at the shooting position, the recording surface of the silver halide film is aligned with the imaging surface of the shooting optical system, and the movable assembly is positioned at the second shooting position by the selective positioning drive means. A light receiving surface of the photoelectric conversion image sensor is made to coincide with an image forming surface of the photographing optical system. 2. The electronic still camera as claimed in claim 1, wherein said movable assembly comprises a first sub-assembly and a second sub-assembly, and wherein said first sub-assembly comprises: The first sub-assembly is disposed in front of the
The sub-assembly includes the restraining means, and the second sub-assembly includes the transparent pressure plate and the photoelectric conversion image sensor. 3. The electronic still camera according to claim 2, wherein said first sub-assembly is connected to said second sub-assembly.
First resilient spring means for resiliently biasing the subassembly, and a second resilient spring resiliently biasing the second subassembly relative to the first subassembly. Means are provided, whereby said first and second subassemblies are resiliently biased against each other and are moved together by said selective positioning drive means. Electronic still camera combined with silver halide film. 4. The electronic still camera combined with a silver halide film according to claim 1, wherein said movable assembly is provided with film detecting means for detecting the presence or absence of a silver halide film. When the detection means detects the presence of the silver halide film, the selective positioning drive means is driven to position the movable assembly at the first photographing position, and the presence of the silver halide film is detected by the detection means. When no is detected, the selective positioning drive means is driven to position the movable assembly at the second photographing position. 5. The electronic still camera as claimed in claim 4, wherein the movable assembly is properly positioned at any one of the first shooting position and the second shooting position. When the movable assembly is determined not to be properly positioned at either the first operating position or the second operating position, the photographing is performed. An electronic still camera for a silver halide film, further comprising a photographing operation disabling means for invalidating an operation command signal. 6. The electronic still camera combined with a silver halide film according to claim 1, wherein said selective positioning drive means comprises a solenoid actuator.
The solenoid actuator has a plunger engaged with the movable assembly and is configured to be selectively driven between a first operating position and a second operating position, wherein the plunger is When in its first operating position, the movable assembly is positioned in the first imaging position, and when the plunger is in its second operating position, the movable assembly is in the second imaging position. An electronic still camera combined with a silver halide film, characterized in that the electronic still camera is positioned at a predetermined position. 7. The electronic still camera combined with a silver halide film according to claim 1, wherein said transparent pressure plate is formed of a transparent glass plate. . 8. The electronic still camera combined with a silver salt film according to claim 7, wherein said transparent plate glass exhibits infrared shielding plate glass characteristics.