JP3689238B2 - Silver still film combined electronic still camera - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hybrid camera capable of selectively photographing an optical subject image obtained by a photographing optical system on either a silver salt film or a photoelectric conversion imaging sensor, that is, an electronic still camera combined with a silver salt film.
[0002]
[Prior art]
2. Description of the Related Art In recent years, an electronic still camera that captures an optical subject image with a photoelectric conversion imaging sensor and appropriately processes a pixel signal obtained by the photoelectric conversion imaging sensor and records it on a recording medium such as a memory card or a magnetic floppy disk has attracted attention. However, we have also developed a hybrid camera that can selectively shoot an optical subject image obtained by the photographic optical system on either a silver salt film or a photoelectric conversion imaging sensor, that is, an electronic still camera combined with a silver salt film. Has been.
[0003]
As an example of a conventional electronic still camera combined with a silver salt film, there is known one in which two units can be detachably attached to the inside of the back cover of the camera body. That is, one unit is a pressure plate unit having a pressure plate for a silver salt film, and the other unit is an electronic image pickup unit having a photoelectric conversion image sensor, and one of these two units is mounted inside the back cover. Thus, the camera is used as a normal photography camera or an electronic still camera.
[0004]
[Problems to be solved by the invention]
However, in such a conventional silver halide film combined electronic camera, every time the photographic camera and the electronic still camera are switched from one to the other, the replacement operation of the pressure plate unit and the electronic imaging unit is accompanied. It becomes very complicated.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hybrid camera that can selectively photograph an optical subject image obtained by a photographing optical system on either a silver salt film or a photoelectric conversion image sensor. An object of the present invention is to provide a silver salt film combined electronic still camera which is a camera and does not require any complicated exchange operation as in the prior art.
[0006]
[Means for Solving the Problems]
The silver still film combined electronic still camera according to the present invention is capable of selectively photographing an optical subject image obtained by a photographing optical system on either a silver salt film or a photoelectric conversion imaging sensor, A movable assembly that is movable in the front-rear direction along the optical axis defined by the photographing optical system, and for selectively moving the movable assembly between the first photographing position and the second photographing position. Selective positioning drive means. The movable assembly is provided with a restraining means for restraining the silver salt film at a predetermined position, and a transparent pressure plate for defining the recording surface of the silver salt film at a predetermined surface position in cooperation with the restraining means. A photoelectric conversion image sensor is incorporated into 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 driving 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 driving means. When positioned at the second imaging position, the light receiving surface of the photoelectric conversion imaging sensor is made to coincide with the imaging surface of the imaging optical system.
[0007]
According to the present invention, preferably, the movable assembly includes a first subassembly and a second subassembly, and the first subassembly is disposed on the front side of the second subassembly. . In this case, the first subassembly includes a restraining means, and the second subassembly includes a transparent pressure plate and a photoelectric conversion imaging sensor.
[0008]
If the movable assembly comprises a first subassembly and a second subassembly, preferably for elastically biasing the first subassembly relative to the second subassembly. First elastic spring means and second elastic spring means for elastically biasing the second subassembly relative to the first subassembly are provided, whereby the first and second subassemblies are provided. The three-dimensional objects are elastically biased so as to abut each other and are moved together by selective positioning driving means.
[0009]
According to the present invention, preferably, the movable assembly is provided with film detecting means for detecting the presence or absence of a silver salt film, and when the presence of the silver salt film is detected by the detecting means, the selective positioning driving means is provided. When the movable assembly is driven to be positioned at the first photographing position and the presence of the silver halide film is not detected by the detecting means, the selective positioning driving means is adapted to position the movable assembly at the second photographing position. Driven. More preferably, positioning detection means for determining whether or not the movable assembly is properly positioned at either the first imaging position or the second imaging position is provided. When it is determined that neither the first operation position nor the second operation position is properly positioned, a photographing operation disabling unit that invalidates the photographing operation command signal is provided.
[0010]
In accordance with the present invention, preferably the selective positioning drive means comprises a solenoid actuator, the solenoid actuator having a plunger engaged with the movable assembly, and having a first operating position and a second operating position. When the plunger is in its first operating position, the movable assembly is positioned in the first imaging position and the plunger is in its second operating position. When in position, the movable assembly is positioned at the second imaging position.
[0011]
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]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of an electronic still camera combined with a silver salt film according to the present invention will be described below with reference to the accompanying drawings.
[0013]
First, referring to FIG. 1, the main internal configuration of a silver salt film combined electronic still camera according to the present invention is schematically shown. This silver salt film combined electronic still camera is configured as a so-called single-lens reflex camera in this embodiment. The The electronic still camera also used as a silver salt film includes a camera body 10 and a lens barrel 12 that is detachably mounted at substantially the center of the front side of the camera body 10. A photographing optical system is provided in the lens barrel 12, and an optical axis defined by the photographing optical system is indicated by a one-dot chain 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 indicated by a two-dot chain line in FIG.
[0014]
A quick return mirror 14 is provided in the camera body 10, and the quick return mirror 14 is disposed on the rear side of the photographing optical system of the lens barrel 12. The quick return mirror 14 is rotatable between a down position indicated by a solid line, that is, an inclined position, and an up position indicated by a broken line, that is, a horizontal position. Normally, the quick return mirror 14 is placed in the down position, but when the photographing operation is performed, the quick return mirror 14 is rotated from the down position to the up position and stopped at the up position for a predetermined time. The rotation control of the quick return mirror 14 can be performed in a known manner.
[0015]
A focus plate 16 is disposed above the quick return mirror 14, and the focus plate 16 forms part of a finder optical system indicated by reference numeral 18. When the quick return mirror 14 is in the down position, the optical axis of the photographing optical system of the lens barrel 12 is deflected toward the focusing plate 16 by the quick return mirror 14. That is, the optical subject image captured by the photographing optical system of the lens barrel 12 is formed on the focusing plate 16 and the optical subject image is observed by the photographer through the finder optical system 18.
[0016]
A shutter 20 is provided on the rear side of the quick return mirror 14, and 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 photographing operation. As in the case of the quick return mirror 14, the opening control of the shutter 20 can be performed in a known manner.
[0017]
A movable assembly 22 is provided on the rear side of the shutter 20, and 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 subassembly 22A and a second subassembly 22B, and the movement of the first subassembly 22A is appropriately provided in the camera body 10. Guided by guide means (not shown), and the second subassembly 22B is guided by guide means (not shown) appropriately provided in the back cover 13.
[0018]
As best shown in FIG. 2, the first subassembly 22 </ b> A is composed of a rectangular frame 24, and a rectangular opening 26 that defines an exposure region is formed at the center of the rectangular frame 24. The 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. Three guide pieces 32 are further attached to the rear surface of the rectangular frame 24 along the upper guide rail 28 on the upper side, and three guide pieces 34 are provided on the lower side along the lower guide rail 30. Is attached. The pair of guide rails 28 and 30 and the six guide pieces 32 and 34 function as restraining means for restraining the silver salt film F with respect to the first subassembly.
[0019]
In the present embodiment, the silver salt film F is stored in a cartridge (film cartridge) in the form of a roll, and the cartridge is stored in one position in the camera body 10 with the back cover open, and on the opposite side. At the position, a take-up spool (not shown) of the silver salt film F is provided. The silver salt film F drawn out from the cartridge passes through a film passage defined by the pair of guide rails 28 and 30 and the six guide pieces 32 and 34, and its tip is engaged with the take-up spool. Thereafter, when the back cover 13 is closed, the silver salt film F moves by one frame so as to cross the rectangular opening 26 while being guided by being restrained by the pair of guide rails 28 and 30 and the six guide pieces 32 and 34. And then sequentially wound by the winding spool described above.
[0020]
The second sub-assembly 22B is configured to control a transparent pressure plate 36 formed of a suitable transparent plate glass, a photoelectric conversion image sensor 38 attached to the rear of the transparent pressure plate 36, and the operation of the photoelectric conversion image sensor 38. And a control circuit board 40 mounted on the rear side of the photoelectric conversion image sensor 38. As the transparent glass for forming the transparent pressure plate 36, those showing infrared shielding properties are preferably used. The photoelectric conversion imaging sensor 38 is configured as an area image sensor from a suitable solid-state imaging device such as a CCD (Charge-Coupled Device). The front surface of the photoelectric conversion imaging 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.
[0021]
As is apparent from FIGS. 1 and 2, a suitable elastic spring element such as a compression coil spring element 42 is applied to each of the four corners of the front face of the rectangular frame 24 of the first subassembly 22A. Therefore, the first subassembly 22A is elastically biased with respect to the second subassembly 22B. On the other hand, an appropriate elastic spring element such as a leaf spring element 44 is also applied to the second subassembly 22B, so that the second subassembly 22B is elastically biased with respect to the first subassembly 22A. Be made. In FIG. 1, the leaf spring element 44 is symbolically symbolized. 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.
[0022]
Specifically, each compression coil spring element 42 is constrained between a suitable chassis structure in the camera body 10 and the rectangular frame 24 of the first subassembly 22A, thereby providing a first subassembly. 22A receives an elastic biasing force toward the second subassembly 22B side. On the other hand, a pair of protrusions (not shown) are provided on the inner wall surface of the back cover 13, and a notch recess 44 </ b> A adapted to receive one of the pair of protrusions is formed at both ends of the leaf spring element 44. The That is, the leaf spring element 44 is mounted in such a manner as to be restrained between the pair of protrusions described above, and at this time, the leaf spring element 44 is convex toward the second subassembly 22B side as shown in FIG. Accordingly, the second subassembly 22B receives an elastic biasing force toward the first subassembly 22A. Accordingly, the first and second subassemblies 22A and 22B elastically abut each other. As described above, the elastic biasing force of the four compression coil spring elements 42 is different from that of the leaf spring element 44. Since it is smaller than the elastic biasing force, the whole, that is, the movable assembly 22 itself is elastically biased forward.
[0023]
As is apparent from FIG. 2, the back cover 13 is configured as a plate material whose both ends are curved, and one curved end portion thereof is pivotally attached to the camera body 10, whereby the back cover 13 is attached to the camera body 10. It can be opened and closed.
[0024]
As shown in FIG. 2, solenoid actuators (SO1, SO2, SO3, SO4) 46 are disposed at the four corners of the rear surface of the rectangular frame 24 of the first subassembly 22A, and each solenoid actuator is provided. As shown in FIG. 3, 46 is housed in a cylindrical housing 48, a permanent magnet 50 suitably provided in the cylindrical housing 48, and movably accommodated in the cylindrical housing 48 along its central axis. It comprises a plunger 52 formed of a suitable magnetic material to cooperate with the permanent magnet 50 and a solenoid 54 disposed around the movement path of the plunger 52. A cylindrical housing 48 of each solenoid actuator 46 is fixed and supported as appropriate 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.
[0025]
As is clear from FIG. 3, the inner end surface of the plunger 52 is made to face the N extreme surface of the permanent magnet 50, and the plunger 52 has its inner end surface turned to the N extreme surface of the permanent magnet 50 in accordance with the energization direction to the solenoid 54. It is moved between a retracted position (solid line position) in a contact state and a protruding position (broken line position) in which the inner end face is separated from the N extreme surface of the permanent magnet. That is, the plunger 52 can selectively take either the retracted position or the protruding position according to the energization direction of the solenoid 54.
[0026]
More specifically, assuming that the plunger 52 is in the protruding position (broken line position), for example, when the solenoid 54 is energized in the direction indicated by the solid line (this energization direction is defined as positive energization for convenience), the plunger 52 Therefore, the plunger 52 is moved toward the retracted position (solid line position) by the magnetic attraction action of the permanent magnet 50, and the inner end face (S pole) of the plunger 52 is the permanent magnet 50. Abuts against the N extreme surface 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 attracted state by the permanent magnet 50 and is stopped at the retracted position.
[0027]
When the solenoid 52 is energized in the direction indicated by the broken line with the plunger 52 in the retracted position, that is, when reverse energization is performed, the inner end surface of the plunger 52 becomes the N pole, and at this time, the plunger 52 is permanently In response to a magnetic repulsive force from the magnet 50, the magnet 50 is moved from the retracted position toward the protruding position.
[0028]
Referring again to FIG. 2, four positioning pins 56 are provided on the front side of the movable assembly 22A. 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 disposed at positions corresponding to the four corners of the front surface of the rectangular frame 24 of the first subassembly 22A, and each positioning pin 56 is fixedly supported by the chassis structure in the camera body 10. .
[0029]
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. This will be described below with reference to FIGS.
[0030]
4 (a) and 4 (b) correspond to FIGS. 5 (a) and 5 (b), respectively, and FIGS. 5 (a) and 5 (b) correspond to FIGS. 4 (a) and 4 (b), respectively. A part of each of (b) is enlarged and shown. In FIGS. 4 and 5, some of the components shown in FIG. 2 are not shown in order to avoid complication of illustration, but in FIG. 5, the chassis structure in the camera body 10 is not shown. The state in which the solenoid actuator 46 is fixedly supported by the part 58 is shown.
[0031]
In FIG. 5 (a), the plunger 52 of each solenoid actuator 46 is in its retracted position. At this time, the light receiving surface of the silver salt film F is the photographing optical system of the lens barrel 12, as is apparent from FIGS. It is positioned at the image plane position defined by. In short, when the silver salt film is loaded in the silver still film combined electronic still camera according to the present invention, the plunger 52 of each solenoid actuator 46 is stopped at its retracted position, and at this time, the movable assembly 22 is moved to the first position. The photographing position (position where photographing is performed on the silver salt film F) is taken.
[0032]
On the other hand, when the silver salt film F is not loaded in the electronic still camera combined with the silver salt film according to the present invention, or when the silver salt film F is loaded, the photoelectric conversion is performed. Shooting by the image sensor 38 is possible, and in such a case, the solenoid 54 is reversely energized to move the plunger 52 of each solenoid actuator 46 from its retracted position to the protruding position. That is, the plunger 52 receives a magnetic repulsive force from the permanent magnet 50 and is moved from the retracted position toward the protruding position, and the movable assembly 22 is moved forward due to the elastic biasing force of the leaf spring element 44. It is done. As described above, the elastic biasing force of the four compression coil spring elements 42 is smaller than the elastic biasing force of the leaf spring element 44.
[0033]
When the rectangular frame body of the first sub-assembly 22A is brought into contact with the four positioning pins 56 by the movement of the movable assembly 22 to the front side, the movable assembly 22 is shown in FIGS. It is moved from the first shooting position shown in FIG. 4A to the second shooting position shown in FIGS. 4B and 5B, and the elastic biasing force of the leaf spring element 44 is moved to the second shooting position. You can stop it. At this time, the light receiving surface of the photoelectric conversion image sensor 38 is positioned at the image plane position defined by the photographing optical system of the lens barrel 12.
[0034]
In order to detect whether the movable assembly 22 is properly positioned to the first and second photographing positions by the four solenoid actuators (SO1, SO2, SO3, SO4) 46, the movable assembly is detected. Four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are provided on the front side of 22A. Each of the four movable assembly detection switches 60 is disposed adjacent to positioning pins 56 at the four corners of the front surface of the rectangular frame 24 of the first subassembly 22A, and each movable assembly switch 60 is connected to the camera body 10. It is fixedly supported by the inner chassis structure. In FIG. 2, as in the case of the positioning pin 56, one of the four movable assembly detection switches 60 cannot be seen because of the rectangular frame 24.
[0035]
The movable assembly 22 is moved from the first photographing position (photographing on the silver salt film F) to the second photographing position (photographing on the photoelectric conversion image sensor 38) by the solenoid actuator (SO1, SO2, SO3, SO4) 46. When moved, the first sub-assembly 22A abuts on the positioning pin 56 and the movable assembly detection switch (SW1, SW2, SW3, SW4) 60 is turned on. Of course, when the movable assembly 22 is in the first photographing position, the movable assembly detection switch (SW1, SW2, SW3, SW4) 60 is turned off.
[0036]
Here, in order to detect whether or not the positioning of the movable assembly 22 to the first and second imaging positions by the four solenoid actuators (SO1, SO2, SO3, SO4) 46 is properly performed, The reason why the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are used will be described. When the camera body 10 receives an impact, the movable assembly 22 is displaced from the first photographing position. Alternatively, the proper positioning of the movable assembly 22 to the first or second photographing position may be hindered due to the entry of dust or the like into the camera body 10.
[0037]
For example, when the plunger 52 of each solenoid actuator (SO 1, SO 2, SO 3, SO 4) 46 is placed in the retracted position, the plunger 52 is physically released from the magnetic attraction to the permanent magnet 50 by an external impact. At this time, the plunger 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. Further, 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 positioned at the first imaging position, but the second It can be moved to the shooting position. On the other hand, if dust or the like that has entered the camera body 10 may prevent the movable assembly 22 from moving normally, the movable assembly 22 cannot be properly positioned at the first or second imaging position.
[0038]
Accordingly, when it is assumed that the movable assembly 22 is properly positioned at the first imaging position, all the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are in the OFF state. If it is assumed that the movable assembly 22 is properly positioned at the second photographing position, all four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned on. It must be in a state. Therefore, by monitoring the on / off states 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 imaging position.
[0039]
As shown in FIG. 2, a film detection sensor 62 for detecting the presence of the silver salt film F is incorporated in the first subassembly 22 </ b> A of the movable assembly 22, and the film detection sensor 62 is formed of the rectangular frame body 24. It is arranged in the film passage on the rear surface. When the silver salt film F is present in the film path, the film detection sensor 62 outputs a high level signal, for example, and when the silver salt film F is not present in the film path, the film detection sensor 62 outputs a low level signal.
[0040]
Referring to FIG. 6, a block diagram of an electronic still camera combined with a silver salt film according to the present invention is shown, and components related to the present invention are shown therein. The system controller 64 is responsible for overall control of the silver still film combined electronic still camera according to the present invention, and is composed of, for example, a microcomputer. The microcomputer executes a central processing unit (CPU) and executes various routines. Are provided with a read-only memory (ROM) for storing the programs and constants, a writable / readable memory (RAM) for temporarily storing data, and an input / output interface circuit (I / O).
[0041]
The system controller 64 drives four solenoid actuators (SO 1, SO 2, SO 3, SO 4) 46 through a solenoid drive circuit 66. Further, the system controller 64 is configured to take in on / off signals from the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60. Further, the system controller 64 takes in a signal from the film detection sensor 62.
[0042]
In FIG. 6, reference numeral 67 denotes a back cover open / close detection sensor for detecting the open / closed state of the back cover 13 of the camera body 10. The back cover open / close detection sensor 67 outputs a low level signal when the back cover 13 is closed. When the back cover 13 is opened, a high level signal is output. Reference numeral 68 denotes a liquid crystal display (LCD) panel provided on, for example, the upper surface of the camera body 10, and the liquid crystal display panel 68 is connected to a system controller 64 via a drive circuit 70, and the liquid crystal display panel 68 The camera setting conditions and various messages are displayed as necessary. Further, reference numeral 72 denotes a power on / off switch, and a power on / off signal is output to the system controller 64 by the power on / off switch 72. Furthermore, reference numeral 74 denotes a release switch, and a release signal is output to the system controller 64 by the release switch 74.
[0043]
7 and 8, a flowchart of a movable assembly driving routine executed by the system controller 64 is shown, and the driving of the movable assembly 22 is controlled according to the movable assembly driving routine. The movable assembly driving routine is an interrupt routine executed at an appropriate time interval, for example, 200 ms. The execution is started by turning on the power on / off switch 72.
[0044]
In step 701, it is determined whether the back cover 13 is closed. That is, it is determined whether or not 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. This routine is executed again after 200 ms, but no progress is made as long as the back cover 13 is opened.
[0045]
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 zero. Since F1 = 0 in the initial stage, the process proceeds to step 703 where it is determined whether or not the flag F2 is zero. In the initial stage, since F2 = 0, the routine proceeds to step 704, where the presence or absence of the silver salt 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.
[0046]
In step 704, when the level of the film detection signal signal from the film detection sensor 62 is high, that is, when the presence of the silver salt film F in the movable assembly 22 is detected (only photographing on the silver salt film F is performed). Proceeding to step 705, it is determined whether the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are on / off (steps 705 to 708). When any one of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 is ON, that is, the movable assembly 22 is suitable for the first photographing position (photographing on the silver salt film F). If not, the process proceeds to step 709 where the release signal is invalidated. Therefore, at this time, even if the release switch 74 is turned on, the release signal is invalidated. When all the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are on, the movable assembly 22 is in the second imaging position (photographing to the photoelectric conversion imaging sensor 38). In this case, the process proceeds to step 709.
[0047]
In step 710, 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 imaging position. Next, in step 711, the flag F1 and the flag F2 are each rewritten to 1, and this routine is once ended.
[0048]
This routine is executed again after 200 ms. At this time, since F1 = 1, the routine proceeds from step 702 to step 712, where the flag F1 is written back from 1 to 0, and the routine is temporarily terminated. When the next routine is executed, the routine proceeds from step 703 to step 713 (F1 = 0, F2 = 1), where the positive energization of the solenoids 54 of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 is off. Is done. That is, the positive energization of the solenoids 54 of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 has been performed for 400 ms.
[0049]
In step 714, the flag F2 is written back from 1 to 0, and then in step 715, it is determined whether or not the count number of the counter N has reached 10. Since N = 0 in the initial stage, the process proceeds to step 716, where the count number of the counter N is incremented by 1, and then this routine is temporarily terminated.
[0050]
When this routine is executed again after 200 ms, the process proceeds from step 701 to step 704 (F1 = 0, F2 = 0), then proceeds again to step 705, and the four movable assembly detection switches (SW1, SW2, SW3). , SW4) 60 is determined (steps 705 to 708). When any one of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 is on despite the solenoid actuator (SO1, SO2, SO3, SO4) 46 being driven by positive energization. That is, when the movable assembly 22 is not properly positioned at the first photographing position, the process proceeds again to step 709, where the release signal is invalidated, and then in step 710, the solenoid actuators (SO1, SO2, SO3). , SO4) 46, the positive energization of the solenoid 54 is started again, and then the flag F1 and the flag F2 are each rewritten to 1 in step 711.
[0051]
In short, the solenoids until all of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned off and the movable assembly 22 is determined to be properly positioned at the first imaging position. The driving by the positive energization of the actuators (SO1, SO2, SO3, SO4) 46 is repeated, and the count number of the counter N is incremented by one each time. Even if the drive of the solenoid actuator (SO1, SO2, SO3, SO4) 46 is repeated 10 times (N = 10) due to malfunction of the solenoid actuator 46 or the like due to malfunction due to entry of dust or the like, If all of the movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are not turned off, the process proceeds to step 717, where an indication that photographing is not possible is displayed on the liquid crystal display (LCD) panel 68. Is called. The count number 10 of the counter N corresponds to a time of 4 seconds.
[0052]
On the other hand, when all of the 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 imaging position (step) 705 to 708), the process proceeds to step 718, where the release signal is validated. Accordingly, 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.
[0053]
In step 719, it is determined whether the count number of the counter N is 10 or more. If N <10, the process skips to step 721, the count number of the counter N is reset, and this routine is temporarily terminated. Thereafter, this routine is executed every 200 ms. As long as the presence of the silver salt film F is detected and all the movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are off, Validation of the release signal is maintained, and photographing on the silver salt film F is enabled.
[0054]
By the way, when the power on / off switch 72 is kept on after the display indicating that photographing is not possible on the liquid crystal display (LCD) panel 68 in step 717, the solenoid actuators (SO1, SO1,. (SO2, SO3, SO4) 46 is driven by positive energization, and during that time all four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned off, and the movable set In some cases, the solid 22 can be properly positioned at the first imaging position. For example, even when the proper movement of the movable assembly 22 is hindered by the dust adhering to the movable assembly 22 and the movable assembly 22 is not properly positioned at the first photographing position, the correctness of the solenoid actuator 46 can be obtained. While the driving by energization is repeated, the dust may fall off the movable assembly 22 and be appropriately positioned at the first photographing position.
[0055]
Step 719 is prepared for such a situation, and if N ≧ 10, the liquid crystal display (LCD) panel 68 has already been displayed indicating that photographing is not possible. Therefore, the process proceeds to step 720, where the display is switched to indicate that photographing is possible.
[0056]
When the level of the film detection signal from the film detection sensor 62 is low in step 704, that is, when the presence of the silver salt film F in the movable assembly 22 is not detected (only photography to the photoelectric conversion imaging sensor 38 is possible). ), The process proceeds to step 722, and it is determined whether the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are on / off (steps 722 to 725). When any one of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 is OFF, that is, the movable assembly 22 is in the second imaging position (photographing to the photoelectric conversion imaging sensor 38). If not properly positioned, the process proceeds to 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. When all of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are off, the movable assembly 22 is positioned at the first photographing position (photographing on the silver salt film F). In this case, the process proceeds to step 726.
[0057]
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 imaging position. Next, at step 728, the flag F1 and the flag F2 are each rewritten to 1, and this routine is once ended.
[0058]
This routine is executed again after 200 ms. At this time, since F1 = 1, the routine proceeds from step 702 to step 712, where the flag F1 is written back from 1 to 0, and the routine is temporarily terminated. When the next routine is executed, the routine proceeds from step 703 to step 713 (F1 = 0, F2 = 1), where the reverse energization of the solenoids 54 of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 is off. Is done. That is, as in the case described above, the reverse energization of the solenoids 54 of the four solenoid actuators (SO1, SO2, SO3, SO4) 46 was performed for 400 ms.
[0059]
In step 714, the flag F2 is written back from 1 to 0, and then in step 715, it is determined whether or not the count number of the counter N has reached 10. At this stage, since N = 0, the routine proceeds to step 716, where the count number of the counter N is incremented by 1, and then this routine is once terminated.
[0060]
When this routine is executed again after 200 ms, after proceeding from step 701 to step 704 (F1 = 0, F2 = 0), the process proceeds again to step 722, and four movable assembly detection switches (SW1, SW2, SW3). , SW4) 60 is determined (steps 722 to 725). When any one of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 is off despite the solenoid actuator (SO1, SO2, SO3, SO4) 46 being driven by reverse energization. That is, when the movable assembly 22 is not properly positioned at the second photographing position, the process proceeds again to step 726 where the release signal is invalidated, and then in step 727, the solenoid actuators (SO1, SO2,. The reverse energization of the solenoid 54 of (SO3, SO4) 46 is started again, and then the flag F1 and the flag F2 are each rewritten to 1 in step 728.
[0061]
In short, the solenoids until all four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned on and it is determined that the movable assembly 22 is properly positioned at the second imaging position. The driving by reverse energization of the actuators (SO1, SO2, SO3, SO4) 46 is repeated, and the count number of the counter N is incremented by one each time. Even if the drive of the solenoid actuator (SO1, SO2, SO3, SO4) 46 is repeated 10 times (N = 10) due to malfunction of the solenoid actuator 46 or the like due to malfunction due to entry of dust or the like, When all of the movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are not turned on, as in the case described above, the process proceeds to step 717, where an indication that photographing is impossible is displayed on the liquid crystal display (LCD ) On panel 68.
[0062]
On the other hand, when all of the four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned on, it is determined that the movable assembly 22 is properly positioned at the second imaging position (step 722 to 725), the process proceeds to step 718, where the release signal is validated. Accordingly, 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.
[0063]
In step 719, it is determined whether the count number of the counter N is 10 or more. If N <10, the process skips to step 721, the count number of the counter N is reset, and this routine is temporarily terminated. Thereafter, this routine is executed every 200 ms. As long as the presence of the silver salt film F is not detected, and all the movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned on. The activation of the release signal is maintained, and the photoelectric conversion image sensor 38 can be imaged.
[0064]
As in the case described above, when the power-on / off switch 72 is kept on after the display indicating that photographing is not possible on the liquid crystal display (LCD) panel 68 in step 717, the solenoid is activated. Drive (SO1, SO2, SO3, SO4) 46 is repeated by reverse energization, and during that time all four movable assembly detection switches (SW1, SW2, SW3, SW4) 60 are turned on. In some cases, the movable assembly 22 can 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]
【The invention's effect】
As is clear from the above description, in the electronic still camera combined with a silver salt film according to the present invention, the movable assembly can be photographed on the silver salt film as long as the silver salt film is loaded in a photographable state. If the movable assembly is in a state where photographing on the silver halide film cannot be performed, the movable assembly is automatically positioned at a position where photographing can be performed on the photoelectric conversion imaging sensor. The electronic still camera can be automatically and quickly switched from one to the other.
[Brief description of the drawings]
FIG. 1 is a schematic view schematically showing a main part of a silver salt film combined electronic still camera according to the present invention.
FIG. 2 is an exploded perspective view showing a movable assembly incorporated in an electronic still camera combined with a silver salt film according to the present invention.
FIG. 3 is a schematic view showing a schematic configuration of a solenoid actuator for driving the movable assembly of FIG. 2;
FIG. 4 compares a silver salt film combined electronic still camera when the movable assembly is positioned at the first photographing position and a silver salt film combined electronic still camera when the movable assembly is positioned at the second photographing position. FIG.
FIG. 5 is a schematic diagram partially showing a main part of FIG. 4 in a partially enlarged manner and contrasted in the same manner as in FIG. 4;
FIG. 6 is a block diagram of a silver salt film combined electronic still camera 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 drive routine.
[Explanation of symbols]
10 Camera body
12 Lens barrel
13 Back cover
22 Movable assembly
22A First subassembly
22B Second subassembly
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 elements
46 Solenoid actuator
56 Positioning pin
60 Movable 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 salt film

Claims (9)

A silver salt film combined electronic still camera capable of selectively photographing an optical subject image obtained by a photographing optical system on either a silver salt film or a photoelectric conversion imaging sensor,
A movable assembly movable in the front-rear direction along the optical axis defined by the photographing optical system;
Selective positioning drive means for selectively moving the movable assembly between a first imaging position and a second imaging position;
The movable assembly is provided with a restraining means for restraining the silver salt film at a predetermined position, and a transparent pressure plate for defining the recording surface of the silver salt film at a predetermined surface position in cooperation with the restraining means, Moreover, the photoelectric conversion imaging sensor is incorporated into the movable assembly at the rear side of the transparent pressure plate,
When the movable assembly is positioned at the first photographing position by the selective positioning driving means, the recording surface of the silver salt film is made to coincide with the imaging surface of the photographing optical system,
When the movable assembly is positioned at the second imaging position by the selective positioning driving means so that the transparent pressure plate is positioned forward of the imaging optical system imaging plane along the optical axis. A silver salt film combined electronic still camera, wherein a light receiving surface of the photoelectric conversion imaging sensor is made to coincide with an imaging surface of the photographing optical system. In the electronic still camera combined with a silver salt film according to claim 1,
The movable assembly includes a first subassembly and a second subassembly, and the first subassembly is disposed on a front side of the second subassembly, and the first subassembly is disposed on the first subassembly. An electronic still camera combined with a silver salt film, wherein the restraint means is included in an assembly, and the transparent pressure plate and the photoelectric conversion imaging sensor are included in the second subassembly. In the electronic still camera combined with a silver salt film according to claim 2,
First elastic spring means for elastically biasing the first subassembly relative to the second subassembly; and the second subassembly relative to the first subassembly. And second elastic spring means for elastically biasing,
Thereby, the first and second sub-assemblies are elastically biased so as to abut each other and are moved together by the selective positioning driving means. Still camera. In the electronic still camera combined with a silver salt film according to any one of claims 1 to 3,
The movable assembly is provided with film detection means for detecting the presence or absence of a silver salt film,
When the detection means detects the presence of the silver salt film, the selective positioning driving means is driven to position the movable assembly at the first photographing position,
When the detection means does not detect the presence of the silver salt film, the selective positioning driving means is driven to position the movable assembly at the second photographing position. Still camera. In the electronic still camera combined with a silver salt film according to claim 4,
Positioning detection means for determining whether or not the movable assembly is properly positioned at either the first imaging position or the second imaging position;
When it is determined by the positioning detection means that the movable assembly is not properly positioned at either the first shooting position or the second shooting position, the shooting operation command signal is invalidated. A silver salt film combined electronic still camera, characterized in that means are provided. In the electronic still camera combined with a silver salt film according to any one of claims 1 to 5,
The selective positioning drive means comprises a solenoid actuator, the solenoid actuator having a plunger engaged with the movable assembly, and selected between a first operating position and a second operating position. Configured to be able to drive
When the plunger is 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 operating position. An electronic still camera combined with a silver salt film, wherein the electronic still camera is positioned at a photographing position. In the electronic still camera combined with a silver salt film according to any one of claims 1 to 6,
A silver salt film combined electronic still camera, wherein the transparent pressure plate is formed of a transparent plate glass. In the electronic still camera combined with a silver salt film according to claim 7,
A silver salt film combined electronic still camera, wherein the transparent plate glass exhibits infrared shielding plate glass characteristics. A silver salt film combined electronic still camera capable of selectively photographing an optical subject image obtained by a photographing optical system on either a silver salt film or a photoelectric conversion imaging sensor,
A movable assembly movable in the front-rear direction along the optical axis defined by the photographing optical system ;
Selective positioning drive means for selectively moving the movable assembly between a first imaging position and a second imaging position;
The movable assembly is provided with a restraining means for restraining the silver salt film at a predetermined position, and a transparent pressure plate for defining the recording surface of the silver salt film at a predetermined surface position in cooperation with the restraining means, Moreover, the photoelectric conversion imaging sensor is incorporated into the movable assembly at the rear side of the transparent pressure plate,
When the movable assembly is positioned at the first photographing position by the selective positioning driving means, the recording surface of the silver salt film is made to coincide with the imaging surface of the photographing optical system ,
When the movable assembly is positioned at the second imaging position by the selective positioning driving means, the light receiving surface of the photoelectric conversion imaging sensor is made to coincide with the imaging surface of the imaging optical system,
The movable assembly includes a first subassembly and a second subassembly, and the first subassembly is disposed on a front side of the second subassembly, and the first subassembly is disposed on the first subassembly. The assembly includes the restraining means, and the second subassembly includes the transparent pressure plate and the photoelectric conversion imaging sensor,
First elastic spring means for elastically biasing the first subassembly relative to the second subassembly; and the second subassembly relative to the first subassembly. And second elastic spring means for elastically biasing,
Thereby, the first and second sub-assemblies are elastically biased so as to abut each other and are moved together by the selective positioning driving means. Still camera.

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