JPH04118640A - Film supply device for camera - Google Patents

Abstract

PURPOSE:To prevent the movement of an object from lacking consistency and to prevent a photographer from having the sense of irregular operation by inhibiting the simultaneous setting of a consecutive photographing mode and a feeding mode in which a film is fed by two frames. CONSTITUTION:In this camera, a single photographing mode and the consecutive photographing mode a2 are switched by a photographing mode switching means (a), and a 1st feeding mode in which the film is fed by one frame after one frame photographing and a 2nd feeding mode b2 in which the film is fed by two frames after one frame photographing are switched by a feeding mode switching means (b). Based on an output signal from the means (a) and (b) and an output signal from a frame detection means (c), a winding control means (d) controls a film feeding means (g). Furthermore, the mode a2 can not be set in the case of a mode b2 and, on the contrary, the mode b2 is inhibited in the case of the mode a2.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a film feeding device that winds and rewinds a film using an electric motor, and in particular, to feed the film efficiently by feeding the film two frames at a time. The present invention relates to a film feeding device that can be fed.

[Conventional technology]

Conventionally, a film feeding device that efficiently feeds a film by feeding it two frames at a time is described in Japanese Patent Application Laid-Open No. 1-202723, and as shown in Section 10, a film feeding device 300 using an electric motor and a frame are used. A conventional film feeding device includes a frame signal generating means 100 for identification, a winding control means 200 for winding two frames at a time, a reversing control means 500 for reversing the film, and a rewinding control means 400 for rewinding two frames at a time. , Since the configuration is as described above, in the mode that feeds two frames at a time, the film is taken while winding two frames at a time, and after winding is finished, the film feed is reversed and unexposed frames are taken while rewinding two frames at a time. can do.

In the reversal control means 500, there is a method of controlling by the amount of winding when the final exposure frame of winding is detected;
A method is used in which the final exposure frame is determined and controlled based on the film DX coat and the number of winding frames.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional example, when both the film feeding mode and the continuous shooting mode, in which the camera feeds the film for two frames after shooting one frame, and the continuous shooting mode are set at the same time,
In advance film feeding mode, the feeding time is longer than usual, so the release interval is also longer. Therefore, continuous shooting in a unit time is hindered, and the original function of the continuous shooting mode is greatly impaired. Furthermore, when reversing the film, the brake is applied to stop the film feeding in the winding direction, and then the film is reversed in the rewinding direction and feeding begins. The release interval time changes and becomes particularly long, which greatly impairs the continuous shooting function. I also feel a sense of discomfort when taking pictures. Moreover, when a series of continuous movements are photographed, the order of the movements does not match the order of the frames, which is very inconvenient in terms of organizing the photographs.

Therefore, the present invention is designed to reduce the number of frames taken per second due to the lengthening of the release interval during continuous shooting, making it impossible to capture changes in a fast-moving subject in a short time, or to prevent the subject from becoming uneven in the release interval. It is an object of the present invention to provide a film feeding device that does not impair the function of continuous shooting such as inconsistent changes in film.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a shooting mode switching means that switches between a single shooting mode and a continuous shooting mode, a first feeding mode that feeds the film one frame at a time after shooting one frame, and a first feeding mode that feeds the film one frame at a time after shooting one frame; A feeding mode switching means for switching to a second feeding mode for feeding the film for the next two frames, a film detecting means for identifying the frame of the film, a film winding means for controlling the winding of the film, and a film rewinding means. The film rewinding means that controls this, and the feeding is reversed when the film winding is finished! It further includes a reversal control means for starting =1 reversal, a film feeding means for winding and rewinding the film using an electric motor, and a mode control means, and the mode control means is configured to switch between the continuous shooting mode and the second shooting mode. is configured to prohibit simultaneous setting of feeding modes.

[For production]

Since the present invention is configured as described above, the photographing mode switching means switches between the single photographing mode and the continuous photographing mode as necessary. The feeding mode switching means similarly switches between a first feeding mode in which the film is fed one frame at a time after shooting one frame, and a second feeding mode in which the film is fed for two frames after shooting one frame. . Based on the output signal of the photographing mode switching means, the output signal of the feeding mode switching means, and the output signal of the frame detection means, the film feeding means is controlled by the winding control means so as to wind the film in synchronization with the photographing operation. If the feeding mode switching means is set to the second feeding mode in which the film is fed two frames at a time, when the end of film winding is detected, the reversing control means reverses the film feeding and starts rewinding; The rewind control means controls the film feeding means to rewind the film in synchronization with the photographing operation.

Further, according to the present invention, since the mode control means is provided, during the above operation, when the mode is to feed the film for 2 frames, the continuous shooting mode is not set, and conversely, when the continuous shooting mode is set, the continuous shooting mode is not activated. A mode in which the film is fed by one frame is prohibited.

〔Example〕

Examples of the present invention will be described above. FIG. 1 is a control block diagram for controlling the film feeding means g, and the control device according to this embodiment includes a photographing mode switching means a, a feeding mode switching means b, a frame detection means C1, a winding control means d, and a film winding control means d. It is composed of a return control means e and a reversal control means f, each of which performs the functions described in FIGS. 2.3 and 4, and ultimately controls the film feeding means g.

The appearance of the camera body or camera body is substantially the same as the conventional one, as shown in FIG. That is, a feeding mode switching dial 37 for switching the film feeding mode is provided on the top surface of the camera, and a frame detection sensor 38 is provided on the upper portion of the back side. Therefore, when the film 30 comes in front of the sensor 38 built into the camera body so as to face the film 30 side, the light emitted from the light emitting section 38a is reflected by the film 30 and is received by the light receiving section 38b, and the sensor 38 turns on (Figure 7). When the film 30 is further advanced and comes to the hole in the perforation 36 or in front of the sensor 38, the light emitted from the light receiving section 38a passes through the hole and is not reflected, so the sensor 38 is turned off again. sensor 3
The output signal of 8 is shown in FIG. When the pressure signal of the sensor 38 is turned ON and OFF eight times, that is, when eight holes in the perforation 36 of the film 30 have passed,
It is judged as 1 frame.

Further, a photographing mode display button 40, a feeding mode switching button 41, etc. are provided on the lower back side of the camera body.

Next, the operation of the first embodiment will be explained. This example is 1
This is an example in which priority is given to the mode in which two frames are fed after frame photography, that is, the second feeding mode, and settings are made as shown in Figure 2.

First, the feeding mode switching means switches between the feeding mode bl of ¥S1, in which one frame is fed after one frame has been photographed, and the second feeding mode b2. When in the first feeding mode b1, it is possible to switch between single shooting mode a1 and continuous shooting mode a2, and when in the second feeding mode b2, only single shooting mode a1 can be switched to continuous shooting mode a2. will not be accepted.

Further, when the first feeding mode b1 and the continuous shooting mode a2 are set, when switching to the second feeding mode b2, the continuous shooting mode a2 is automatically switched to the single shooting mode a1.

More specifically, this embodiment will be explained with reference to the flowchart of FIG. 4. First, in step 1, initial values used for determination during reversal control are set. This setting value is determined in step 17. In the next step 2, it is determined whether or not a film is loaded. As shown in FIG. 5, the film case 35 is placed in the cartridge chamber 43, the tip of the film 30 is placed on the spool 31, and when the back fi 32 is closed, the film 30 is pressed by the pressure plate 33, and the film loading detection SW 34 is activated.

If film is loaded, that is, if 5W34 is on, autoloading is started (step 2) and the process proceeds to step 4; if it is off, the process proceeds directly to step 4. At this time, the shooting mode switching means The photographing mode and the feeding mode are determined by a and the feeding mode switching means, and the process proceeds to step 4. Here, the photographing mode switching means a and the feeding mode switching means will be explained. When the shooting mode display button 40 is pressed, the camera external display member 4
The mark 45a representing the single shooting mode of the camera shooting mode 45 is shown in 4, and the mark 45a showing the continuous shooting mode
5b is displayed. The switching operation member 37 is used to switch the shooting mode.

When the feeding mode switching button 41 is pressed, a second feeding mode is set in which two frames are fed after shooting one frame, and a mark 46 indicating the second feeding mode is displayed on the camera external display member 44. Ru. When the feeding mode switching button 41 is pressed again, the first feeding mode in which one frame is fed after shooting one frame is set, and the mark 46'' displayed on the camera external display member 44 disappears. In other words, the first feeding mode is a state in which the display mark 46 has disappeared.The photographing mode display mark and the feeding mode mark are not limited to those in the embodiment, and other marks may be used as long as they can be used to determine each mode. .

In step 4, it is determined whether the rewind switch 5w39 is pressed, and if it is on, step 5
, the film starts rewinding, and the rewind switch is pressed.
If 39 remains the same, go to step 6. The SWI, which is turned on when the release button 45 is pressed down one step, is turned off and in a standby state unless the release button 45 is pressed (step 6). When SWI is turned on, photometry in step 7 and distance measurement in step 8 are performed, and when the release button 45 is pressed down one more step, the camera enters a standby state for SW2, which is turned on.

When SW2 is turned on, the shutter is driven in step 1o and photographing is started.

At step 11, the film feeding mode is determined. If the film is in the first feeding mode, which feeds one frame at a time, the process proceeds to step 12; if the film is in the second feeding mode, which feeds two frames at a time, the process proceeds to step 16.

In step 12, the film is wound up and fed one frame at a time while controlling the film feeding means g based on the output signals of the frame detection means C and the winding control means d.

After shutter charging (step 13), step 14
, the shooting mode determined by the shooting mode switching means a is first determined, and if it is continuous shooting mode, SW2 is set to O.
Repeat shooting until FF is achieved. If it is the single shooting mode, the process goes to step 15, and at the same time as SW2 is turned off, the end of shooting is detected in step 16. If the photographing has not yet been completed, the process goes to step 4 and the same operation as described above is performed. When the end of shooting is detected, the process goes to step 5 and starts rewinding. If it is determined in step 11 that the feeding mode already determined by the photographing mode switching means a is the second feeding mode, the process proceeds to step 16 after charging the shutter. Here the second
At feeding mode 1, it is determined whether or not photographing in the winding direction has been completed, and since R=φ has been initialized in step 1, the process proceeds to step 2o. The film is wound up and fed two frames at a time while controlling the film feeding means g based on the d force signal from the frame detection means C and the winding control means d mentioned above. In step 21, it is detected whether or not the photographing in the upward direction has been completed, and if it has not been completed, the process is turned OFF and the process directly proceeds to step 4. Then, the same operation as described above is performed.

When the end of photography in the winding direction is detected, R=φ initialized in step 1 is set to R=1 and the process proceeds to step 4.

From step 4 to step 16, the same operations as described above are performed. Since R=1 in step 17, the process goes to step 18.

While controlling the film feeding means g based on the output signals of the frame detection means C and the rewinding control means e mentioned above,
Rewind and feed two frames at a time. Step 19
The completion of photographing is detected at , and if the photographing is not completed, it is turned OFF and the process goes to step 4, where the same operation as described above is performed. When the end of shooting is detected, turn ON and go to 5 to start rewinding the film and winding the film.

Next, a second embodiment will be described with reference to FIG. 3, in which the continuous shooting mode is prioritized over the second feeding mode in which two frames are fed after shooting one frame.

First, the photographing mode switching means a is used to switch between the single photographing mode a1 and the continuous photographing mode a2.In the single photographing mode al, there is a first feeding mode b1 in which one frame is fed after photographing one frame, and the second feeding mode b1. feeding mode b2
It is possible to switch between the
Switching to the second feeding mode b2 is not accepted only in the feeding mode b1.

Further, the single shooting mode a1 and the second feeding mode b
2, when switching to continuous shooting mode a2, the second feeding mode b2 is automatically switched to the first feeding mode al.

Next, the operation of the second embodiment will be explained with reference to the flowchart shown in FIG. Steps 1 to 3 are the same as the operations of the first embodiment. Further, the operations of the photographing mode switching means a and the feeding mode switching means A, the display on the camera external display member 44, etc. are also the same as those of the first embodiment described above.

Based on the aforementioned setting conditions shown in FIG. 3, the photographing mode and the feeding mode are determined by the photographing mode switching means a and the feeding mode switching means A, and the process proceeds to step 4.

In step 4, it is determined whether the rewind switch 5W39 is pressed, and if it is pressed and turned on,
Go to step 5 and start rewinding the film, and if rewind 5W39 remains the same, go to step 6. The SWI, which is turned on when the release button 45 is pressed down one step, is turned off and in a standby state unless the release button 45 is pressed (step 6). When SW1 is turned on, photometry in step 7 and distance measurement in step 8 are performed, and when the release button 45 is pressed down one step further, the camera enters a standby state for SW2, which is turned on. When SW2 is turned on, the shutter is driven in step 10 and photographing is started. And step 1
In step 1, the film feeding mode is determined, and if the first feeding mode is feeding one frame at a time, step 12
If the second feeding mode is to send two frames at a time, the process advances to step 16.

Here, the frame detection means in step 26 will be explained again. The outline is shown in detail in Fig. 7. When the film 30 comes in front of the sensor 38 built into the camera body so as to face the film 30 side, the light emitted from the light emitting part 38a is reflected by the film 30 and is received by the light receiving part 38b, and the sensor 38 is turned on. do. When the film 30 is further advanced and the hole of the perforation 36 comes in front of the sensor 38, the light emitted from the light receiving section 38a passes through the hole and is not reflected, so the sensor 38 is turned off again. The output signal of sensor 38 is shown in FIG.

When the output signal of the sensor 38 is turned ON and OFF eight times, that is, the perforation 36 of the film 30
When 8 holes have passed, it is judged as one frame.

The operations from step 12 onward are the same as those in the first embodiment described above, so a redundant explanation will not be given.

〔Effect of the invention〕

As detailed above, according to the present invention, the film feeding device has a mode control means, and simultaneous setting of the continuous shooting mode and the feeding mode of 'f%2, which feeds two frames at a time, is prohibited. Therefore, simultaneous settings are prohibited by giving priority to one of the modes, so failures caused by setting them simultaneously, for example, the release interval for continuous shooting will be longer than usual, and you may not be able to develop the photos after shooting. This has the effect of preventing irreversible mistakes, such as realizing that the photograph was not intended for the first time.

In particular, when the film feed is reversed, the release interval suddenly changes, which can cause inconsistent movement of the subject and prevent the photographer from feeling an irregular operation and feeling uncomfortable or thinking there is a malfunction.

Further, by eliminating the rewinding operation after photographing is completed, it is possible to eliminate the disadvantages of installing the second feeding mode in the camera, which has the advantages of securing a photographic opportunity and reducing noise, leaving only the advantages.

[Brief explanation of drawings]

:igt diagram is a block diagram showing a control example of one embodiment of the present invention, Figure 342 is a block diagram showing the operation of the first embodiment,'
FIG. M3 is a block diagram showing the operation of the second embodiment, FIG. 4 is a flowchart, FIG. 5 is a perspective view showing an example of automatic film loading, FIG. 6 is a perspective view of the camera according to this embodiment, Fig. 7 is a perspective view showing an example of a film detection means, Fig. 8 is an explanatory view showing an example of a film frame detection switch, Fig. 9 is a plan view showing an example of a display section, and Fig. 10 is a conventional control. It is a block diagram. 34...Film loading detection switch 37...Switching operation member 38...Frame detection sensor 39...Rewind switch 41...Feeding mode switching button and 4 others

Claims (1)

[Claims] 1. A shooting mode switching means for switching between a single shooting mode and a continuous shooting mode, a first feeding mode for feeding film one frame at a time after shooting one frame, and a second feeding mode for feeding film for two frames after shooting one frame. a feeding mode switching means for switching to a feeding mode; a film detecting means capable of identifying film frames; a film winding means for controlling the winding of the film; a film rewinding means for controlling the rewinding of the film; It further comprises a reversal control means for reversing the feeding at the end and starting rewinding, a film feeding means for winding and rewinding the film using an electric motor, and a mode control means, the mode control means being configured as described above. A film feeding device for a camera, characterized in that simultaneous setting of a continuous shooting mode and a second feeding mode is prohibited.