JPH0468334A - Camera provided with magnetic head - Google Patents

Abstract

PURPOSE:To eliminate the disturbance of a magnetic head part when a film is loaded by providing an energizing means for setting the magnetic head part to a retreating position and a driving means for setting the magnetic head part to a data processing position by making use of the power of a motor for film traveling on a magnetic head driving mechanism. CONSTITUTION:The magnetic head part 1 and the magnetic head driving mechanism 4 for setting the magnetic head part 1 to the data processing position where the head part 1 is made to closely contact with the film and to the retreating position where it is apart from the film are provided. And the magnetic head driving mechanism 4 is provided with the energizing means 14 for setting the magnetic head part 1 to the retreating position by energizing the magnetic head part 1 in a direction where it is apart from the film and the driving means 8, 9, and 10 for setting the magnetic head part 1 to the data processing position by resisting to the energizing power of the energizing means 14 by the power of the motor for the film traveling while the film is traveling. Thus, the disturbance of the magnetic head part 1 is eliminated when the film is loaded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a camera equipped with one magnetic head for writing and reading data on a film having a magnetic surface for recording photographic data.

[Conventional technology]

Conventionally, a film having a magnetic surface made of a magnetic material has been disclosed in JP-A-59-79236 and JP-A-60-17447 so that photographic data can be read and written. ing. Cameras that use such film to process photographic data require a magnetic head, and in order to process data by bringing the magnetic surface of the film into close contact with the magnetic head, for example, It is also necessary to provide a pad for sandwiching the film between the magnetic head and the magnetic head. By the way, by fixing the magnetic head and the pad 7 at the positions where data is processed relative to the film, the film is passed between the magnetic head and the bed when the photographic data is processed. Considering that it must be loaded in the camera, it is obvious that this will hinder loading. It's a magnetic bellybutton!
In some cases, when loading the film, unlike the data processing position where the film is sandwiched between the magnetic head and the butt,
It is preferable that it can be set at a separate retracted position between these and the film.

[Invention or problem to be solved]

In this way, in order to configure the magnetic head section so that it can be set at the data processing position for the film and at the retracted position away from the film, a mechanical section for driving the magnetic head section between the above-mentioned positions is required. It becomes necessary to newly provide this in the body. Providing a mechanism to drive the magnetic head in this way may cause the camera to become larger, and the number of mechanical parts that operate the magnetic head increases compared to conventional cameras. control tends to become complicated. Therefore, the technical problem to be solved by the present invention is that in a camera using film with a magnetic surface, for example, in order to prevent the magnetic head or pad from getting in the way when loading the film, the magnetic head part is used to store data. It is configured so that it can be set at a processing position and a position evacuated from there, and the magnetic nod part can be driven between each position with a simple mechanism that does not increase the size of the camera, and is easy to do. It is about being able to control it.

[Means to solve the problem]

A camera with a magnetic head according to the present invention is configured as follows in order to solve the above technical problem. In other words, there is a magnetic head section for writing and reading data on a film having a magnetic surface for recording photographic data, a data processing position where the magnetic head section is placed in close contact with the film, and a data processing position where the magnetic head section is placed in close contact with the film. The magnetic head drive mechanism biases the magnetic head part away from the film and sets it in the retracted position. and a driving means for setting the magnetic head part at the data processing position against the urging force of the urging means by using the power of the film running motor for pH when the film is running. .

[Action/effect] In the above configuration, when the film is not running, the magnetic head section is urged away from the film by the urging means provided in the magnetic head drive mechanism and set to the retracted position. Therefore, when loading the film, the magnetic head section does not get in the way and prevent the film from being loaded, and the user does not have to worry about loading the film. On the other hand, when the film is running, the magnetic head portion is set at the data processing position against the biasing force of the biasing unit by a driving unit that operates using the power of the film running motor. Therefore, the head portion, which had not been in contact with the film, now comes into close contact with the film, making it possible to reliably read and write photographic data on the film. In this way, in the above configuration, based on the fact that reading and writing of photographic data is performed only while the film is running, the driving force of the film running motor, which is the drive source for film running, is controlled by setting the position of the magnetic head unit. This also serves as a driving force for the magnetic head, eliminating the need for a new motor or the like to drive the magnetic head between each position. Therefore, according to this configuration, it is possible to suppress an increase in the size of the camera and an increase in power consumption, and since there is no need to add a motor, it is also possible to prevent the control of the camera from becoming complicated. (Margin below) 【Example】

Embodiments of the camera with a magnetic head according to the present invention will be described in detail below with reference to FIGS. 1 to 27. The camera of this embodiment has a mechanism, which will be described in detail later, that when the film is stored inside the case and placed in a predetermined position in the body, the camera drives the film to wind it around the spool. It is constructed so that it can be delivered to a single nickel cartridge. This camera has a magnetic head 2 fixed to the body of the camera, and a magnetic head 2, as shown in FIG. The magnetic head part I is comprised of a pad 3 that is driven by a drive mechanism 4 and moves between a position pressed against the pad 2 and a position slightly separated from the position. The photographing information is read and written to the magnetic head unit 1 or the film at the data processing position where the butt 3 is pressed against the magnetic head 2 and the film is sandwiched between them. The magnetic head section 1 is set at a retracted position where the film can be moved freely between the bat 3 and the magnetic head 2 by being located away from them. The magnetic head section 1 is provided at a predetermined position between a film cartridge 6 and a spool 7 around which the film is wound. A drive mechanism 4 that moves the bat 3 between the above positions and sets the head 1 to either the data processing position or the retracted position is fixed to one end of the pad 3 and rotates in a direction perpendicular to the film surface. \First part configured to be movable
0 point 87, a 20th point 9 for moving this 10th point 8 and setting its position, a drive lever IO that swings to move this 20th point 9, and a drive lever 10. The stopper 11 is configured to restrict the movement of the 20th rod 9 against the driving force. The tenth hole 8 has an elongated hole 13 into which two fixing pins 12 provided on the body side are fitted, so that
At the same time as the movement direction is regulated, the difference between the distance between each pin 12 and the length of the elongated hole 13 is set as the amount of movement. Further, since a tension spring 14 is provided between the first rod 8 and the body 5a, the action of this spring 14 normally causes the pad 3 to be separated from the head 2 and set at the T2 position. The 20th Sodo 9 has two fixed pinots 1
5 is fitted into the elongated hole 16, and the moving direction and amount of movement are regulated. At the same time, the position of the 20th bolt 9 relative to the 10th bolt 8 is adjusted by bringing the claw 8a formed on the 10th bolt 8 into contact with the claw 9a formed on the 20th bolt 9. It is connected to the first rod 8 via a tension spring 17 so as to restrict the relationship in one direction. In order to move this 20th rod 9 toward the magnetic head 2 along the elongated hole 16, the drive lever IO is driven by a motor (see FIG. 2, reference numeral 24) as a drive source via a friction transmission mechanism. It is composed of Further, the stopper 11 is composed of a 30th prong 18, a lever 22, and a plunger 23. The 30th throat 18 has a claw 18a that controls the movement of the 20th throat 9 by engaging with a claw 9b formed on the 20th throat 9. In order to restrict the direction and amount of movement of the two fixed pins 19 so as to engage and release them from each other, there are elongated holes 20 into which the two fixed pins 19 are inserted. In order to actually perform such a ζ operation, the 30th node I8 moves a lever 2 that swings around a fulcrum 21.
2 to the planter 23. This camera uses a prewind method in which the film stored in the Cartlitz 6 is wound onto a spool in advance, and then the film is wound into the Cartridge 6 in order from the frame that has been photographed. Each of the film winding and winding operations and the operation of the drive mechanism 4 described above are performed by the same motor, and the configuration of the drive system for the film winding and winding operations, including the motor that drives these, is shown in Figure 2. The configuration will be explained here. In the figure, 24 indicates a motor that is a drive source for each of the above-mentioned operations. This motor 24 is connected to an input gear 26 via a reduction gear system 25 (in the figure, all the gears are represented by f2 for simplification, and only the pitch circle diameter is shown by a solid line). An output gear 27 having the same rotation center as the input gear 26 is attached to the input gear 26 . input gear 2
As shown in FIG. 3, which shows the cross section taken along the line ■-■ in FIG. The output gear 27 is formed with a hole 27a that fits into the projection 26a, and an arcuate groove 27b that follows the trajectory of the projection 26b as the input gear 26 rotates. The rotation of the output gear 27 is controlled by the input gear 28 for driving the spool.
and are transmitted to each of the driving input gears 39 of the forks 36 that operate the film via a gear train (not shown) (indicated by broken lines). A planetary carrier 31 holding a planetary gear 29 with this gear 28 as a sun gear is rotatably attached to a shaft 37 that supports the spool input gear 28. By engaging or disengaging the planetary gear 29 or the spool gear 30, driving or non-driving of the spool 7 can be selected. Further, on the shaft 38 supporting the fork input gear 39, an L-shaped planetary carrier 3 holding two planetary gears 32 and 33 with this gear 39 as a sun gear is attached.
4 is rotatably installed, and the fork input gear 3
These planetary gears 32 and 33 engage and disengage from the fork gear 35 in response to the rotation of the fork 3.
It is configured such that driving/non-driving and rotation direction when driven can be selected. The operational states of the mechanism described above are shown in Figure 1 from Figure 4.
Although FIG. 7 shows the prewind and winding states of the film, in order to explain these operations using the flowcharts shown in FIGS. 23 to 27,
First, the configuration of the electric circuit of this camera will be explained using the block section shown in FIG. CP shown in the center of the figure represents a microcomputer (hereinafter referred to as a microcomputer) that controls the operation of this camera. The FLS shown above the microcomputer CP is a flannel tube control section, which controls the light emitting operation of the flannel tube through the microcomputer CP. In addition, the furanotsuyu control section F
LM and AF shown at the lower right of LS represent a photometry section and a distance measurement section, respectively, which perform photometry and distance measurement according to commands from the microcomputer CP, and feed back measurement data to the microcomputer CP. DS further below indicates a display control section, which controls the display of various data in a display window provided on the body of the camera. S shown below the display control 11Ds. to S8 indicate various switches, and the operation of the camera is determined depending on the on/off states of these switches. So is the main switch that operates the camera in the off state,
SL is a photometry switch that performs photometry in the on state, and S!
is a release switch that releases the shutter when it is on. Also, this camera is a camera that performs zooming or electrically, and the S3 is turned on by operating the zoom switch button on the camera body to the wide-angle side, and the viewfinder is moved from the telephoto side to the wide-angle side. This is a zoom out switch to change to S.
Reference numeral 4 denotes a zoom-in switch that is turned on by operating the zoom switch button reversely to the telephoto side to change the viewfinder from the wide side to the telephoto side. In addition, since the photographing range changes according to the operation of the viewfinder, the photographing lens may also be zoomed accordingly, or the photographing lens itself may not be zoomed but the print area may be changed to correspond to the changing photographic range. Trimming information is given to the film at the time of shooting to limit it. Also, S shown below S4. shows a cartridge lid switch that is turned on when the opening/closing lid for inserting the cartridge into the body is closed. S8 is a film winding detection switch that is turned on when the film is wound around the spool by a signal from a detection means provided to detect the state in which the film is wound around the spool; This is a magnetic head position detection switch that turns off when the magnetic head is in the position. S8 is a flash switch that controls the flash on/off depending on the on/off state, and S9 is off when the loaded film is unused and when it is used. This is a film usage display detection switch that turns on. Here, a configuration for detecting whether or not a film has been used by turning on and off the film usage indication detection switch will be explained together with the film cartridge used in this camera. First, the cartridge 6 used in this camera has an external shape as shown in FIG.
A film status display means 50 indicating whether the film has been used or not is provided at one end of the film. This film status display means 50 allows the photographer to distinguish between used and unused film at a glance, and also allows the microcomputer CP to determine whether the film is used or not, and performs operations according to the status. Let's go. This film status display means 50 has a concave portion 5 as shown in FIGS.
1 and a slide F'K<H that can be moved laterally within it.
52, and whether the above-mentioned film is used or not is determined according to the position of this slide member 52. Detection means 55 provided on the camera side to detect the position of this slide member 52 includes a film use display detection switch 58 (indicated by S in No. 1811 & Condition recess 5
It consists of a protrusion 53a provided on the body 53 so as to be inserted into the body 53, and an L-shaped detection lever 54 attached to the body 53 with a detection piece 54a protruding toward the cartridge 6 from the through hole 53b. has been done. The detection lever 54 is fitted into a fixing bin 57 or an elongated hole 56 and is attached to the body 53 in a state where it is biased along its length by a tension spring 59. It is located directly to the side. Figure 20 shows how to insert an unused cartridge into the camera body 53.
This shows the state immediately before installation. In an unused cartridge, the slide member 52 is located on the protrusion 53a side of the body 53, so as shown in the figure, the slide member 52 is located on the protrusion 53a side.
contacts the tapered portion 52a of the slide member 52, and at the same time the detection piece 54a of the detection lever 54 contacts the recess 5 of the cartridge.
It is inserted into 1. Therefore, as shown in FIG. 21, when the cartridge 6 is further installed, the slide member 52 moves under the action of the protrusion 53a and presses the detection lever 54 toward the detection switch 58, turning the detection switch 58 on. change in state. Further, FIG. 22 shows the mounting state of a used cartridge in which the film has been photographed halfway or a used cartridge in which the film has been photographed to the end. In this case, the slide member 52 is moved toward the detection lever 54 side. Therefore, when the cartridge 6 is installed, the slide member 52 comes into contact with the detection piece 54a and tilts the detection lever 54, and the detection switch 58 is not operated, so the detection switch 58 is maintained in the OFF state. Ru. In this way, the film status display means 50 is configured to operate the detection means 55 when the film is attached to the camera in an unused state, and at the same time change its own state. If the device has been used, the detection means 55 is not activated and the state of the device itself is checked.
It is configured so that it does not change. On the other hand, in the block diagram shown in FIG.
The DTC shown below P is a data control unit connected to the magnetic head HD for processing photographic data for film. Further, shown on the left side of the microcomputer CP, "2 AC is an actuator driving section, and a first motor M (reference numeral 24 in FIG. 2) for rewinding and winding the film and driving the magnetic head section 1. A second motor M1 that operates the finder between the wide-angle position and the telephoto position, and a blur PL (for regulating the position of the bat 3 described above)
23) in FIG. 1, respectively. Incidentally, the blunt gloss PL is caused by applying a positive pulse voltage to the second. The engagement between Tanikaze 9b and 18a of 9.18 is released to enable the bat 3 to move toward the head 2 side, and by applying a negative pulse voltage, Tanikaze 9b18
a to prevent the bat 3 from moving toward the head 2 side. Further, EX shown below AC is an exposure control section, which controls the operation of the third motor M3 that focuses the photographing lens and drives the camera. EN shown further below is a zoom encoder for detecting the zoom position of the finder. And the P below that
shows a photo ink printer for detecting whether or not the film has been advanced frame by frame. Next, the operation of this camera configured as described above will be explained using the flowcharts shown in FIGS. 23 to 27 and the operation state diagrams shown in FIGS. 4 to 17. Note that in these flowcharts, each operation step is indicated by the symbol S. FIG. 23 shows the main routine for the overall operation of this camera. In step 001, the camera is in a stopped state and is waiting for an input. If any operation is performed in this state, it is determined in step 002 whether the cartridge lid switch S5 has been switched from off to on, that is, whether the cartridge lid has been closed. If the switch S5 changes from OFF to ON due to the cartridge lid being closed, then in step 003, the film is brewinded according to the briwind subroutine shown in FIGS. 24 to 26. After this prewind, and if the switch S5 is not turned on, the main switch S is turned on in step 004. It is determined whether the shutter release is on and the shutter release is possible. And main switch S. is off or the release prohibition flag is set, a display indicating that the main power is off is made in step 005, and then the process returns to step 001 and the state is again set to wait for input. On the other hand, as a result of the determination in step 004, the main switch S. If it is determined that the camera is in a state where it is possible to release the camera, a message indicating that the main power is on is displayed in step 006, and then a message is displayed indicating whether the metering switch S1 has been switched from off to on. (Step 0)
07). If there is no change in the photometry switch S, it is determined in step 008 whether the zoom out switch S is on, and if it is on, a zoom out subroutine is executed accordingly, and the viewfinder zooms. Out is performed (step 009). on the other hand,
If the zoom out switch S is off, step 0
At step 10, it is determined whether the zoom-in switch S4 is on. If it is determined that it is on, a zoom-in subroutine is executed in step 11 to zoom in the finder. These switches S3. S
, are off, the data is displayed in step 012, and then the process returns to step 001 to return to the input waiting state. ''-When it is determined in step 007 that the photometry switch S1 is switched from off to on, a subroutine for photometry is executed in step 013. Then, in step 014, after photometry is performed, it is determined whether the photometry switch S1 is still maintained in the on state. If it is turned off, the process returns to step 001 via step 012, and the input is input again. It will be in a waiting state. On the other hand, if the photometry switch S is maintained in the off state, it is determined in step 015 whether the release switch S is turned off, and if it is off, steps 013 to 015 are repeated. On the other hand, when the release switch S2 is set to ON, a focus detection routine is performed in step 016 as an operation immediately before shutter release in order to ensure focusing, and then the third motor M3 described above The photographic lens is focused in accordance with the detected focal position (step 017), and the shutter is driven to perform exposure control (step 018).
. When the exposure control is completed, the process proceeds to step 019), where the film is wound one frame and the shooting information is recorded on the film according to the subroutine shown in FIG. It will be in a waiting state. Next, the film prewind operation shown in step 003 in this main routine will be explained using the flowcharts shown in FIGS. 24 to 26 and the operation state diagrams shown in FIGS. 1 to 13. . When the prewind routine is executed, first, in step +01, two types of error counters EFL I and EFL2 are each reset to 0 in order to count the number of errors during automatic film loading. And to prohibit photography during prewind, step! At step 02, a release prohibition flag is set. Next, in step 103, it is determined whether the loaded film is unused or already used, and in order to distinguish between used and unused film, a flag NFL is set for the unused cartridge. If so, set to 0,
If the cartridge has been used, it is set to 1. However, even if it detects that the film has already been used and NFL is set to 1, the film may have been removed during shooting and then reloaded, or the film may have already been shot or it may have been reloaded. It is unknown at this point. When the above settings are completed, then in step 104, it is determined whether the magnetic head portion l is in the data processing position or in the retracted position based on the on/off state of the magnetic head position detection switch S7. When S7 is on, that is, when it is determined that the magnetic head portion l is in the retracted position, a negative pulse voltage is applied to the blunt glosser PL in step 105, and first the pad 3 is applied to the head 2 side. movement is prohibited. The head portion I and drive mechanism 4 shown in FIG. 1 represent the state at this time. With the movement of the pad 3 being prohibited in this manner, next, in step 106, the first motor M starts normal rotation. As shown in FIGS. 4 and 5, the operating state at this time is that the drive lever 10 swings due to the rotation of the motor 24 (first motor M,
However, since the claws 9b and 18a are engaged with each other, slipping occurs in the friction transmission mechanism, and the 20th claw 9 remains in that position, maintaining the retracted position of the head part 1. On the other hand, the rotation of the motor 24 is also transmitted to each input gear 28, 39, and the spool gear 30 and fork gear 35 rotate via the planetary gear 2932 in accordance with the rotation, thereby driving the spool 7 and the fork 36. be done. Therefore, the film is gradually pushed out of the cartridge 6 by the rotation of the fork 36, and passes between the magnetic head 2 and the pad 3 toward the spool side, as shown in FIG. Subsequently, in step 107, a timer is started to detect whether a loading error occurs within a predetermined time. Then, in step 108, it is determined from the state of the magnetic head position detection switch S7 whether or not the magnetic head unit 1 is still maintained at the retracted position, and further, in steps +09 and 110, the film winding detection switch is It is determined whether S6 is turned on, that is, whether the film is wound around the spool 7. As a result, when it is detected that the film is being wound around the spool 7, the first motor MI is temporarily stopped in step III. Then, in step 112, a positive pulse voltage is applied to the plano gloss PL so that the 30th point 18 is retracted from the engagement position with the 20th point 9, and in step 113, the PI counter or Then, in step +14, the first motor M1 starts normal rotation again (6th and 7th [k)]. At this time, since the 30th pin 18 has retreated from the engagement position with the 20th pin 9, the second
The spring 9 moves toward the magnetic head 2, and the springs 14 and 17
Due to this action, the magnetic head 2 and the pad 3 are pressed against each other with a predetermined force, and the magnetic head section 1 moves to the data processing position (Fig. 8.9). The spool 7 is driven by a gear train so that its circumferential speed is always faster than the circumferential speed of the fork 36.
After wrapping around the planetary gear 32 and the fork gear 35, the meshing state between the planetary gear 32 and the fork gear 35 is released as shown in FIGS. 7 and 9. Further, in order to check whether the magnetic head unit 1 has been set to the data processing position within a predetermined time by normal rotation of the motor, step 115. At +16.117,
It is determined whether the magnetic head position detection switch S is turned off within the time set by the timer. If this switch S7 is turned off, it means that the positioning of the magnetic head l to the data processing position during pre-winding has been completed, but if it remains on and does not change, it is assumed that an abnormality has occurred, and step +18 is performed. Camera stops working. Thus, in the above configuration, when the cartridge 6 is loaded and the film is fed out, the head l is set to the retracted position where the film can easily pass through, and is set to the data processing position after the film is reliably wound around the spool 7. Ru. Therefore, it is effectively possible to prevent the leading edge of the film from being caught by the magnetic head 2 or pad 3 constituting the magnetic head section 1 during feeding, thereby effectively preventing errors in film loading. By the way, after entering the briwind subroutine, after the error counter etc. are set as described above, if it is determined in step 104 that the magnetic head unit 1 is at the data processing position, first step 119 is performed. The first motor M starts reverse rotation, simultaneously starts a timer, and then detects the state of the magnetic head position detection switch S7 to determine whether the head l has changed to the retracted position within a predetermined time. (step 120.
121.122). When the head portion I changes to the retracted position, the first motor M is activated in step 123. If the operations from step 105 onwards are carried out as described above after the camera stops, or if the head part (3) does not change to the retracted position, it is assumed that an abnormality has occurred and all functions of the camera are stopped in step 124. Also, in step 108, the film spool 7
If it is determined that the Ruzu head 1 has changed to the data processing position even though it is wrapped around the
In step 1, the error counter EFL1 counts 1 and determines whether the counted number is 4 or more, that is, whether the error has occurred 4 or more times.
26. If the error has occurred less than 4 times, step + 19 hesitation is performed and the subsequent operations described above are performed; if the error has occurred 4 or more times, step]
27, the operation stops due to the occurrence of an abnormality. Also, although it was confirmed in step 108 that the head+11 was maintaining the retracted position, the next step 109
If it is determined that the film has not been wound around the spool 7 within a predetermined time, another error counter EFL2 is counted by one (step 12).
8). In this case as well, it is determined in step +29 whether the error has occurred four or more times, and if it is determined that the error has occurred four or more times, the camera function is stopped in step 133 as an abnormality. . On the other hand, if the error occurs less than four times, there is a possibility that the film may have been advanced a little in the previous operation, so the motor M1 is reversed for a predetermined time in steps 130, 131, and 132, and then again in step 104. The following actions will be executed. With the flow as described above, the magnetic head section l or step II6
When the data processing position is set and briwind is started, the operations are sequentially performed in accordance with the flowchart shown in FIG. 25. First, in step 134, a data reading/processing subroutine is entered, where data such as film sensitivity and number of shots are read into the microcomputer and processed. Next, step +14
It is determined in steps 135 and 136 whether or not the photo ink printer PI is switched by the motor operation at 1 to advance the film force q frames, and in that case, whether or not the specified number of sheets of film has been reached. If the value has not been reached, the PI counter is counted by one (step 137). For films that have been shot once, data to that effect is written in the frames that have been shot, so step 1
At step 38, it is detected whether photographic data has been recorded for the switched frame, and at step 139, it is determined whether or not the data exists. As a result, if it is confirmed that no photographic data is recorded in that frame and that it can be photographed, in step 140, a memory map is created to remember that the frame corresponding to the PI counter can be photographed. The shooting permission flag is set in a predetermined memory area in the memory divided into areas as
The operations from step 135 onwards are performed again until the specified number of sheets is reached. On the other hand, if it is recognized in step 139 that data is recorded in that frame, step 1
41, depending on whether the flag is NFL or l,
A check is made to see if the cartridge has been reloaded. If it is a reloaded cartridge, it is natural that photographic data is recorded in that frame, so in step +42, the frame corresponding to that PI counter is stored in a predetermined location in the memory. After the photographing permission flag is set in the memory area, the operations from step 1'35 onwards are executed again until the specified number of images are taken. When the film is pre-wound to the specified number of sheets while reading the photographic data in this manner, the motor M stops -1 in steps 143 and 144, and then
Start reversing for normal winding. In this case, as shown in FIG. 11, the spool gear 30 becomes free when the planetary gear 29 is separated, and the fork gear 35 is reversed by the action of the planetary gear 33 so that the film can be wound up. At the same time, at step +45, the presence or absence of a photographable flag in the memory is checked to see if there are any frames on the loaded film that can be photographed. If there is a photographing permission flag, the number of frames to be fed for that frame is set in step 146, and the film is fed by that number in steps 147 to +49. This state is shown in FIG. 10, and as shown in the figure, the drive lever 10 presses the 20th throat 9 toward the head 2 side even when the motor M (24) is reversed, and the head section 1 is placed in the data processing position. configured to maintain. With this configuration, all frames of the film are read during data reading or prewinding, so a frame that can be photographed is reliably detected and shooting continues from that frame, so no film is wasted. Even if you change the film in the middle of shooting, you can easily take the next shot. Further, since the prewind is used to determine whether or not each frame can be photographed, no special time is required for this detection. When the film is advanced to a frame that can be photographed in the above manner, the motor M starts rotating in the forward direction in step 150.
At the same time, in steps 151 and 152153, it is determined whether the head portion l has been switched to the retracted position within a predetermined time. If the head part L is not switched to the retracted position, step 154 is determined to be an error and all functions of the camera are stopped, or if the switch is normal, the motor M is stopped in step +55, and then In step 156, a release prohibition flag is set. This completes the setting of the shooting state, and as a result, the mechanism section is as shown in Fig. 12 and 1.
It is set to the f state shown in Figure 3. The head portion 1 is set to the retracted position within the range in which the protrusion 26b of the input gear 26 slides within the groove 27b without rotating the output gear 27, as shown in the operating state in FIG. input gear 26
If it rotates further, the output gear 27 or the input gear 26 rotate simultaneously to advance the film, and at the same time, the drive lever IO also moves to the 20th gear 9.
is swung so as to press it toward the head 2 side. By the way, step! As a result of the determination in step 45, if it is determined that there are no frames that can be photographed, it means that a film that has already been photographed has been loaded by mistake. The film is rewound until it reaches 0 (steps 157-159). And further step 160
．． At 161, the film fed during autoloading is rewound for a predetermined amount of time, and then in step 1
62, a warning is displayed indicating whether the cartridge is loaded or used, and then the process returns to the main Ludino. In this case, the photographer can remove the cartridge and load a new cartridge. On the other hand, when determining the data for each frame when prewinding the film, it is determined in step 139 that there is shooting data in that frame, but if it is determined in step 14+ that the flag is not NFL Rikizuki, the cartridge Even though the film status display means 50 indicates that the film is unused, photographic data is still being recorded. This happens because the detection means 55 for detecting whether the film has been used or not, which is installed in the camera, is not working properly, or because the slide member 52 of the display means 50, which is installed in the cartridge, is not working properly. The possible cause may be that the camera is moved by f2, but if the image is taken as is, there is a risk that a photographing error such as double photographing may occur, so in such a case, the following measures will be taken. That is, in steps 163 and 164, the motor M is stopped and reversed, and the film is rewound by the number of frames fed from that frame to the frame where the Pr counter reaches O (steps 165 to 167). Then, in steps 168 and 169, the film fed during autoloading is further rewound, and step 1
At 70, after an indication that the loaded cartridge is not suitable, the process returns to the main routine. Therefore, in this case as well, the photographer can take out the cartridge and load a new cartridge, thereby preventing mistakes in photographing. Furthermore, it is also possible to program the cartridge so that it can perform photographing even if it is determined that photographic data has been recorded even though the cartridge is unused. The flow in that case is shown in Fig. 26 (the same operation as in Fig. 25 is performed except for the different portions of correspondence). In this flow, when such contradictory judgments are made at steps +39 and 141, step 171
, it will be displayed that there is such an abnormality in the film. Following this display, in step +42, in order to remember that the frame corresponding to the Pr counter cannot be photographed, the photographable flag is reset in a predetermined memory area in the memory, and then
The operations from step 135 onwards are executed again until the specified number of sheets is reached. That is, in this flow, a tentative warning is given to the photographer, but priority is given to the determined data and settings are made to enable photography. By programming in this way, even if a cartridge 6 in which the film status display means 50 has been moved by mistake is loaded, photography can be carried out normally. The above is the prewind operation that is common to this camera. Next, in the main routine shown in FIG. 23, the subroutine for one-frame winding and information processing is actually executed as step 019, and the flowchart shown in FIG. 27 and the operations shown in FIGS. This will be explained in detail using a state diagram. First, a release prohibition flag is set in step 20+ to prevent the release from being performed while the film is being wound. Then, in step 202, the motor M starts reverse rotation, and at the same time, in step 203, a timer is started. Then, in steps 204 and 205, it is checked whether the head 1 is set at the data processing position by determining the state of the magnetic head position detection switch S7. If the head portion l has not changed from the retracted position, in step 206, all functions of the camera are stopped as an abnormality has occurred. On the other hand, when the head l is set at the data processing position, in step 207, photographing information is written onto the film. This state is shown in FIGS. 14 and 15. Then, as shown in steps 208 and 209, the PI double signal is switched and the film is switched! When it is determined that a frame has been advanced, the motor M1 is stopped. Depending on whether the film is pre-wound before being shot or when it is taken normally without pre-winding, shooting starts from the opposite end of the film. In the case of films that were shot halfway through the film, or films that were shot at both ends of the film by both normal shooting and shooting after prewinding, the next frame after winding one frame has already been shot. There is. Therefore, whether or not the frame can be photographed is determined from the presence or absence of a photographable flag in the memory (step 2] 0). As a result, if the shooting permission flag is set, step 21 determines whether all the film in that cartridge has been taken or not.
It is determined by 1. If the film has not finished yet, the motor M1 starts normal rotation in step 212, and then, in steps 213 to 215, the magnetic head position detection switch S7 is turned on within a predetermined time, and the magnetic head section 1 has been switched to the retracted position. If it is still not switched,
In step 216, all functions of the camera are stopped as an abnormality, and on the other hand, if they have been switched, the motor M1 is stopped in step 217, and the release prohibition flag is reset in step 218, and the camera is set to a ready state. Ru. This state is shown in FIGS. 16 and 17. As explained above, the head section is normally set at the retracted position and is set at the data processing position using the driving force of the winding motor only when winding the film (including prewinding). There is no need for special means or electric power to hold the heads I in their respective positions, and the position of the head I can be controlled by a simple mechanism, so space and costs can be saved. On the other hand, in step 210 described above, when it is determined whether or not the set frame can be photographed, if it is confirmed that the photographable flag is not set, step 219
The frame number at that time is set in the PI counter. Then, between steps 220 and 223, the film is rewound until the PI counter reaches 0, and in steps 224 and 225, the amount of advance during autoloading is rewound. Then, a message indicating that the film has ended is displayed (step 226), and the process returns to the main routine. If it is determined in step 21+ that the film has ended, the process proceeds to step 227 and jumps to step 224, where the amount of advance during autoloading is rewound, and then a message indicating that the film has ended is displayed ( Step 226) returns to the main routine operation. In this way, all unshot frames are detected during rewinding, and based on that data, the film is rewound when all frames have been shot, so that even partially shot film is not wasted. , you can easily change the film without double exposure. In this camera, the butt 3 of the head portion l is configured to be movable, but it is also possible to configure the magnetic head 2 to be movable while the bat 3 is fixed. Further, instead of the plunger 23 provided for controlling the position of the head portion l, a mechanism may be provided that detects the amount of film feed and switches the position in a flexible manner.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the head section and drive mechanism of a camera with a magnetic head according to the present invention, FIG. 2 is a block diagram of a drive system for film rewinding and winding, and FIG. Line sectional views, Figures 4 to 17 are
FIG. 18 is a block diagram showing the electric circuit of this camera; FIG. 19 is an external view of the cartridge used in this camera; FIG.
22 are partial cross-sectional views showing the structure and operating state of the film use/unuse detecting section, and FIGS. 23 to 27 are flow charts showing the operation of this camera. l...Magnetic head section, 2...Magnetic head, 3 Pad, 41. Drive mechanism, 5. Body, 6. Cartridge,
7...Spool, 8...10th hole, 9...20th hole, 1O drive lever, 11.Stopper 12..Fixing pin, 13..Elongated hole, 14.Tension spring, 15..Fixing Pin, 16・Elongated hole, 17・Tension spring, 18・30th pin, 19・Fixing pin,
20・Elongated hole, 21・Fulcrum pin, 22・Lever 23
・・Plunger, 24・・Motor, 25・・Reduction system, 26・・Input gear, 27・Output gear, 28・Spool input gear, 29・Planet gear, 30・・Spool gear, 3I・・Planetary carrier , 32.33...planetary gear,
34... Planet carrier, 35... Fork gear, 3
6. Fork, 37. 38... Shaft, 39... Fork input gear, 50... Film status display means, 51
... recess, 52, slide member, 53 body, 54
・Detection lever, 55・Detection means, 56・Elongated hole, 57・
・Pin, 58 ・Detection switch, 59-41 tension spring patent Applicant Agent: Minolta Camera Co., Ltd.
Person Patent Attorney Maeda 葆 (and 1 other person)Figure 4Figure 3Figure 6S Figure 6SabaFigure 0tFigure 8Figure 9Figure 12Figure 12tbFigure 14Figure 16Figure 5th Figure 19r Doji

Claims (1)

[Claims] (1) a magnetic head section (1) for writing and reading data on a film having a magnetic surface for recording photographic data;
1), a data processing position in close contact with the film;
a retracted position away from the film; and a magnetic head drive mechanism (4) for setting the magnetic head part (
a biasing means (14) for biasing the magnetic head (1) in a direction away from the film and setting it at the retracted position;
) to a data processing position against the urging force of the urging means (14).