JPH0792550A - Magnetic data recording camera - Google Patents

Abstract

PURPOSE:To make a camera advantageous in the viewpoint of space and cost without using an exclusive actuator by using a mechanically charging motor as the drive source of the advancing/retreating mechanism of a magnetic head, at the time of providing it. CONSTITUTION:This magnetic data recording camera is equipped with a first motor M1 mechanically charging a shutter, a mirror, a diaphragm, etc., and simultaneously driving the magnetic head (or pad) for advancing/retreating and a second motor M2 for feeding a film (feeding motor). A first rotation cam part 22 is driven to rotate by the output of the charging motor M1 via a speed reduction system 21. The rotation of the one rotation cam part 22 is transmitted to the magnetic head, a mechanical part for charging 23 and a diaphragm driving unit 51 via each driving mechanism, to drive them. A take-up spool 14 and a rewinding fork 28 are driven while being changed over by the output of the feeding motor M2 via a speed reduction system 26 and a winding and rewinding switching mechanism 27. The rotation of a notch gear for driving the diaphragm 50 is transmitted to the diaphragm driving unit 51 and a diaphragm driving spring 52.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic data recording camera which uses a film with a magnetic storage unit for magnetically storing photographed data and writes or reads magnetic data to or from the magnetic storage unit.

[0002]

2. Description of the Related Art Conventionally, in a magnetic data recording camera using this type of film with a magnetic storage portion, it is necessary to bring a magnetic head or the like into contact with the film surface for recording when the film is fed. However, if the magnetic head etc. is always kept in contact with the film surface, partial force is applied to the film at the time of shooting, the flatness of the film may be damaged, or the magnetic head may stick to the film surface after being left for a long time. There is a problem. Therefore, a drive mechanism for retracting the magnetic head or the like from the film surface is required.

In a camera equipped with such a mechanism,
There is one in which the magnetic head is retracted from the film surface abutting position by a head retracting mechanism except when writing and reading the magnetic data to and from the magnetic memory portion of the film (for example, Japanese Patent Laid-Open No. 3-200131). See the bulletin). Further, there is a film feeding time of a film is measured by a timer or the like, and a pad is driven to move in and out so that the magnetic head can be operated in a required time (Japanese Patent Laid-Open No. 4-301).
833 and 4-301834). In order to prevent the shooting light from being vignetted, when the film is fed and magnetically recorded, the pad that presses the magnetic head is moved into the shooting optical path, and the pad is retracted from the shooting optical path when shooting. There is one (Japanese Patent Laid-Open No. 4-28)
9843).

Further, there is one in which the magnetic head and the pad are retracted so as not to get in the way when the film is loaded, and the magnetic head is moved by using the driving force of the film feeding motor during the magnetic recording. 4-68334
Issue). Further, there is a film feeding motor in which a magnetic head or a pad is driven to an operating position and the state is held by an electromagnet (Japanese Patent Laid-Open No. 3-288639).
(See Japanese Patent Publication).

[0005]

By the way, the above-mentioned JP-A-3-200131, JP-A-4-301833, and JP-A-4-301833.
In the apparatus disclosed in Japanese Patent No. 301834, No. 4-289843, etc., the contact and retreat of the magnetic head or the like with respect to the film surface are performed by using an actuator for that purpose. This has been a constraint for saving space and reducing the cost of the camera.

Further, Japanese Patent Laid-Open Nos. 4-68334 and 3-2.
In the camera shown in Japanese Patent No. 88639, the film feeding motor provided in the camera is used to bring the magnetic head or the like into contact with and withdraw from it. However, in the case where the film feeding motor is used as the drive source of the magnetic head as described above, since the contact timing of the magnetic head is normally during the film feeding, the magnetic head in the retracted position contacts the film. After the contact, the film was wound up, and then the magnetic head was retracted, and the operation had to be sequential, and there was a limit to increasing the operating speed.

The present invention solves the above problems,
In a camera provided with a motor for mechanically charging a shutter, a mirror, or an aperture, and a motor for performing film feeding, when providing a retracting mechanism of a magnetic head for writing or reading magnetic data, By using the mechanical charging motor as the drive source for the retracting mechanism,
To provide a magnetic data recording camera which is advantageous in terms of space and cost in the camera without using a dedicated actuator, and in which mechanical charge and film feeding can be performed at almost the same timing, thereby improving the operation speed performance. With the goal.

[0008]

To achieve the above object, the present invention provides a magnetic head for writing or reading magnetic data to or from a magnetic storage portion on a film, and the magnetic head or the film for the magnetic head. In a magnetic data recording camera provided with a drive mechanism for moving the pads facing each other across the magnetic storage unit to and from a working position for writing or reading magnetic data and a non-working position retracted from the film surface, A device provided with a first motor that mechanically charges a shutter, a mirror, or an aperture, and that is connected to the drive mechanism and that drives the magnetic head or the pad to move in and out, and a second motor that feeds the film. Is.

[0009]

According to the above construction, the magnetic head for writing or reading the magnetic data to or from the magnetic storage portion on the film or the pad facing the magnetic head with the film sandwiched between the magnetic head and the magnetic data is driven by the drive mechanism. Is moved to and from a working position where writing or reading is performed and a non-working position retracted from the film surface. This drive mechanism is performed by a first motor that mechanically charges a shutter, a mirror, or a diaphragm, and the film is fed by a second motor. At this time, it is necessary to set a timing such that the first motor drives the magnetic head or the pad to the working position, and then the second motor feeds the film. The film feeding by the motor No. 2 originally has only to be performed at substantially the same timing, which is convenient for improving the operation speed performance.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a transverse cross-sectional view showing a schematic configuration of a single-lens reflex camera capable of recording magnetic data using a film with a magnetic storage unit. In the figure, a film cartridge 12 is loaded in a chamber formed in a camera body 11 in a camera body 10.
3 is drawn out, passes through the exposure image frame portion, and is wound up and fed to the winding spool 14 for each photographing. In front of the exposure image frame portion, a mirror unit 16 on which light passing through the taking lens is incident is arranged, and a shutter unit 15 is arranged between the mirror unit 16 and the film 13. Also,
A magnetic head 17 and a pad 18 are arranged on the downstream side of the exposure image frame portion in the feeding direction of the film 13 with the film 13 interposed therebetween.

FIG. 2 is a diagram showing a motor drive mechanism of this camera. This camera includes a first motor M1 (referred to as a charge motor) that mechanically charges a shutter, a mirror, a diaphragm, and the like, and drives the magnetic head 17 (or the pad 18) to move in and out, and a second motor M1 for film feeding. Motor M2
(Referred to as a feeding motor). The output of the charge motor M1 passes through the speed reduction system 21 and rotationally drives the one-rotation cam portion 22. The one-rotation cam portion 22 is integrally formed with a magnetic head ejection drive cam 30, a mechanical charge cam 40, and a diaphragm drive notch gear 50.

The rotation of the one-rotation cam portion 22 is transmitted to the magnetic head 17 (not shown in FIG. 2), the charge mechanism portion 23, and the diaphragm drive unit 51 via the respective drive mechanisms to drive them. . The output of the feeding motor M2 is rotationally driven while switching between the winding spool 14 and the rewinding fork 28 via a speed reduction system 26 and a winding / rewinding switching mechanism 27. The rotation of the aperture drive notch gear 50 is transmitted to the aperture drive unit 51 and the aperture drive spring 52. Reference numeral 15a is a shutter charge lever, and 16a is a mirror charge lever. Details of a drive mechanism of the magnetic head 17 and a drive mechanism of the charge mechanical section 23 including these will be described later.

FIG. 3 shows a magnetic head advance / retreat drive cam 3 in the one-rotation cam 22 driven by the charge motor M1.
The angle distribution of 0 and the mechanical charge cam 40 is shown. The switches SA and SB are for timing the drive of the charge motor M1, and the specific configuration of each cam is shown in FIGS. 6 to 9 described later. According to the rotation angle of the one-rotation cam 22, the magnetic head advance / retreat drive cam 30 moves in the head pressing section (30a).
And a head retreat section (30b) are formed, and the mechanical charge cam 40 includes a mechanical charge section (40b, 40c).
A waiting section and a release section (40a) are formed. The head pressing section corresponds to the mechanical charge section, and the head retracting section corresponds to the standby section and the release section.

FIG. 4 shows two motors M in this camera.
It is a circuit diagram which controls 1 and M2. In the figure, only the part related to motor control is shown. The CPU 55, which is a control microprocessor, has a release switch S2 for shooting commands and switches SA, S for discriminating the section of the one-rotation cam 22 rotated by the charge motor M1.
B, the film perforation detector 56 is connected. The film perforation detector 56 detects the amount of movement of the film driven by the feeding motor M2, and is used to accurately wind one frame. CPU55
Is based on the output of each switch and the detector 56,
A control signal is sent to the motor driver 57 to drive and control the charge motor M1 and the feeding motor M2.

FIG. 5 shows the operation in the case of shooting one film with this camera. Film cartridge 12 for camera
Is loaded (# 1), initially loaded (# 2),
It goes into a standby state (# 3). In the one-frame exposure (# 4), the shutter of the mirror unit 16 is retracted from the exposure optical path by the release mechanism, and then the shutter curtain is run while the shutter unit 15 is controlled at the time. At the time of this exposure, in order to secure the flatness of the film, the magnetic head 17 is previously retracted to a position (non-acting position) where the film 13 is not touched. In the mechanical charge and the one-frame winding (# 5) after the end of exposure, the shutter and the mirror that travel in the spring are charged by the mechanical charge mechanism driven by the charge motor M1 and locked. In parallel with this, one frame of the film 13 is wound up by the feeding motor M2. At this time, the magnetic head 17 provided next to the exposure image frame portion cooperates with the pad 18 facing it. do it,
The magnetic data is read and written by coming into contact with the magnetic storage portion of the film 13.

When the power is turned off (# 6), the magnetic head 17 may be left as it is for a long time. Therefore, in order to prevent the magnetic head 17 from sticking to the film, the magnetic head 17 is retracted to the inoperative position. After exposing to the last frame,
The film is rewound (# 7), the film is wound into the film cartridge 12, and the film cartridge 12
Take out (# 8). In this camera, the magnetic head 17 is retracted to the non-acting position at least during release exposure and when the power of the camera is turned off.

Next, by adding FIGS. 6 to 9 to the above drawings, the magnetic head advance / retreat drive cam 30 and the mechanical charge cam 40 and the drive mechanism thereof at the main timing of the one-rotation cam 22 in this camera. Each operating state will be described. 6 shows the magnetic head 17 retracted, and FIG. 7 shows the magnetic head 1.
7 is in contact with the film 13, FIG. 8 is in a release operation, and FIG. 9 is in a mechanical charge.

During standby (# 3 in FIG. 5), the cam is in the standby section (for the section, see FIG. 3, the same applies below), and the magnetic head 17 is retracted. During exposure (# 4), the rotation of the charge motor M1 causes the cam to enter the release section, retract the mirror of the mirror unit 16 and drive the diaphragm, and stop within the release section. The stop operation in the release section can be performed using signals from the switches SA and SB (SA on and SB off in the release section) which are turned on and off in synchronization with the one-rotation cam 22.

During this standby / exposure, as shown in FIG. 6, the surface of the magnetic head ejecting / retracting drive cam 30 is on the head retracting cam surface 30b, and one end of the lever 31 pivotally supported by the shaft 32 is on the head retracting cam surface 30b. The other end of the lever 31 is urged by the spring 34 to move the magnetic head lever 33 urged by the spring 34 in the direction of contacting the film 13 against the urging force of the spring 34 to move the magnetic head 17 to the non-acting position. Have been evacuated to. In addition, as shown in FIG.
The surface is on the standby / release section cam surface 40a, the lever 41 pivotally supported by the shaft 42 and biased by the spring 43 in the cam surface direction is rotated in the spring biasing direction, and the mechanical charge lever 44 is set to the release position. I'm back.

At the time of mechanical charging (# 5), the rotation of the charge motor M1 enters the mechanical charging section to restore the mirror of the mirror unit 16 and charge the shutter unit 15, and stop before the standby section. To do. The stop position can be determined by detecting the signals from the switches SA and SB. At the time of this mechanical charging, as shown in FIG. 7, the surface of the magnetic head advance / retreat drive cam 30 is on the head pressing cam surface 30a, and the lever 31 rotates, so that the spring-biased magnetic head lever 33 is , The magnetic head 17 moves in the direction of contacting the film 13. As a result, the magnetic head 17 is pressed against the film 13 whose back side is held by the pad 18. Further, as shown in FIG. 9, the surface of the mechanical charge cam 40 is on the cam surface 40b during mechanical charging, and the lever 41 and the mechanical charge lever 44 are moved against the spring 43 and charged. When the one-turn cam 22 is further rotated counterclockwise, the cam surface reaches the mechanical charge end cam surface 40c,
The mechanical charge ends. At the end of this mechanical charge,
The switch SA is turned off and the switch SB is turned on.

At the time of mechanical charging (# 5), in parallel,
The film is wound up one frame by the feeding motor M2.
Since magnetic recording is performed during winding, it is necessary to press the magnetic head 17 against the film 13 and set it at the working position, so that one frame is wound while the one-rotation cam 22 is in the mechanical charge section. That is, the mechanical charge is started by energizing the charge motor M1, the film winding is started by the feeding motor M2 after the mechanical charge section is started, and the mechanical charge section is left until the film winding is completed and the standby section is reached. The charge motor M1 is controlled so as not to go into When the winding is completed, the one-rotation cam 22 is rotated to the standby section to prepare for the next release.

When the power is off (# 6), the one-rotation cam 22 is first set to the standby section, and then the power is turned off, whereby the magnetic head 17 can be kept in the retracted state.

FIG. 10 is a flowchart of the one-frame shooting sequence. When the release switch S2 is turned on from the standby state (# 21), the one-frame shooting sequence is started, and the mechanical release is first performed (# 22 to # 24). In the mechanical release, the charge motor M1 is energized (# 2
2) The one-rotation cam 22 is moved from the standby section to the release section and stopped (see FIG. 3). In this operation, the edge where the switch SA is turned on is detected (YES in # 23), and the charge motor M1 is braked (# 24) so that the one-rotation cam 22 is stopped within the release section. This is possible by setting the reduction ratio of the drive system. The charge motor M1 performs both release and charge.

Mechanical charging end cam surface 40c in the waiting section
Upon entering the release section, the lever 41 lifted down falls on the release section cam surface 40a (see FIG. 8) and stops after the mechanical release is performed. By this mechanical release, the mirror is retracted (mirror up) and the shutter is unlocked. However, the shutter is
The charged state is maintained by adsorbing the shutter curtain by an electromagnet (not shown) prior to the mechanical release.

In the above mechanical release operation, with respect to the diaphragm, the diaphragm drive notch gear 50 is rotated integrally with the mechanical charge cam 40, and the engagement of the gear portion and the diaphragm drive unit 51 enters the release section. (See Fig. 8). Therefore, the diaphragm is released almost simultaneously with the mirror and the shutter. On the other hand, since the magnetic head ejection / removal cam 30 is on the head retreating cam surface 30b through both the standby and release sections, the magnetic head 17 remains retracted.

Next, when the film exposure (# 25) is started,
Exposure is performed by sequentially moving the shutter curtains that are electromagnetically attracted as described above away from each other.

After that, the mechanical charge (# 29 to # 32)
And one-frame film feeding (# 26 to # 28) are performed in parallel. First, the mechanical charge operation will be described. The charge motor M1 is energized (# 29), and the one-rotation cam 22 is moved from the release section to the mechanical charge section to the mechanical charge end section. When the switch SB is turned on from off, it can be determined that the mechanical charge section is entered, and at the same time, the magnetic head 17 is pressed against the film 13 by the head pressing cam surface 30a. Next, the magnetic head 17 maintains the pressed state until the switch SB is turned off, that is, until the mechanical charge section ends. The end of the mechanical charge section is determined by detecting the time when the switch SB is turned on and the switch SA is turned from on to off (Y in # 30).
ES). After this is detected, the charge motor M1 is braked (# 32) until the feeding of one frame is completed (NO in # 31).

On the other hand, in the mechanical charge section, the mechanical charge cam 40 is on the cam surface 40b during the mechanical charge, and the lever 41 is lifted to perform mirror return (mirror down) and shutter charge. At the same time, the diaphragm drive unit 51, which was disengaged in the release section and was in the free state, is also held in the charged state in the mechanical charge end section and the subsequent standby section.

The one-frame feeding (# 26 to # 28) which is performed at the same time as the mechanical charging after the film exposure will be described.
Energize the feeding motor M2 (# 26), feed the film while monitoring the film perforation signal, and
When the frames are fed (YES in # 27), the feeding motor M2 is braked (# 28) and stopped. At the time of feeding the film, when the switch SB is turned on during the mechanical charge period, the magnetic head 17 is in contact with the film 13, so that the magnetic data can be read and written. When it is necessary to bring the magnetic head 17 into contact with the film over the entire area during the feeding of one frame, first, the charge motor M1 is energized and driven until the switch SB is turned on, and then the feeding motor M2 is energized. Then you can send it.

Next, the initial return (# 33 to # 35) will be described. When the feeding of one frame is completed, it is not necessary to keep the magnetic head 17 in contact with the film 13, so the charge motor M1 is energized (# 33), and the one-rotation cam 22 is moved from the mechanical charging end section to the standby section. Move to. It can be determined that the standby section is entered at the timing when the switch SA is off and the switch SB is on to off (YE in # 34).
S), brake the charge motor M1 (# 3
5). In this operation, only the magnetic head 17 is retracted.

It should be noted that it is also conceivable to read and write magnetic data at the time of rewinding, other than at the time of winding one frame. In this case, it is sufficient to energize the feeding motor M2 to perform rewinding while keeping the one-rotation cam 22 held in the charging end section.

FIG. 11 is a sequence showing the relationship between each section of standby / release / mechanical charge and head withdrawal / retraction, FIG. 11 (a) shows the case of the above embodiment, and FIG. 11 (b) shows a modified example. Show. In this modified example, the one-rotation cam 22 described above is used.
The feeding section is added to the series in the above section, the magnetic head is retracted in the standby section and the release section, and the magnetic head is pressed in the other mechanical charge section (# 13) and the feeding section (# 14). . As a result, mechanical charging, film feeding, and moving of the magnetic head can be performed with one motor, which is more advantageous in terms of space and cost.

FIG. 12 is a side view showing the construction of one embodiment of the charging mechanism section 23 (FIG. 2), showing the release state. FIG. 13 shows the charge completed state of the same part. The mechanical charge lever 44 is driven via the lever 41 from the mechanical charge cam 40 shown in FIGS. The mechanical charge lever 44 moves the mirror charge pin 16a provided on the mirror up and down to retract and restore the mirror. In FIG. 12, the mirror is in the retracted state, and in FIG. 13, the mirror is in the restored state. The mechanical charge lever 45 gear-coupled to the mechanical charge lever 44 and biased by the mechanical charge lever biasing spring 46 drives the shutter charge lever 15a of the shutter unit 15 upward to perform shutter charging. At the time of release, the shutter unit 1 is temporarily closed by an electromagnet (not shown) in the shutter unit 15.
With the charge state of No. 5 held, the charge mechanism is released, and then the electromagnet is controlled to separate for a second to expose the film.

The output from the aperture drive notch gear 50 shown in FIGS. 8 and 9 is input to the aperture drive unit 51,
The aperture driving spring 52 is charged in the charging section. At the time of release, the notch portion (the portion without gear teeth) of the notch gear 50 for diaphragm drive is located on the diaphragm drive unit 51 side, so that the unit 51 becomes free and the diaphragm drive spring 5 is released.
Rotate in the narrowing direction by 2. This rotation is guided to the diaphragm mechanism in the lens by a coupling mechanism (not shown).

FIG. 14 shows the construction of another embodiment of the drive mechanism for actuating and deactivating the magnetic recording, in which the magnetic head 17 is fixed and the pads 1 facing each other with the film 13 sandwiched therebetween.
I am trying to move 8. In this figure, the magnetic head 1
7 shows a state where 7 is in contact with the film 13. In this example, the magnetic head driving element of the above-described embodiment is replaced with a pad driving element. In particular,
The pad lever 63 biased by the spring 64 in the direction of contacting the film 13 is moved back and forth by the pad rotation driving cam 30 of the one-rotation cam via the lever 61 pivotally supported by the shaft 62. The cam 30 includes a pad contacting cam surface 30a and a pad retracting cam surface 30b. Similar to the first embodiment, the pad pressing section is a mechanical charge section, and the pad retracting section is a standby section and a release section.

[0036]

As described above, according to the present invention, a magnetic head (or pad) for reading and writing magnetic data is used in a camera in which two motors are used to mechanically charge a shutter, a mirror, a diaphragm, etc., and a film is fed. , And so on)
In the case of installing a retracting mechanism for the magnetic head, the magnetic head is driven in and out by driving a motor that performs mechanical charging.
Compared to the conventional actuator using a dedicated actuator, it is advantageous in terms of space and cost. Further, since it is during film feeding that the magnetic head is brought into contact with the film to be in the operating state, it is necessary to carry out the film feeding after the magnetic head is in the operating state. It is necessary to control the operation timing of the motor and the feeding motor, but originally, the mechanical charging and film feeding by the two motors are performed at substantially the same timing, so the operation control of both motors is performed in almost parallel. Can be done
It does not impair the operating speed performance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a camera capable of recording magnetic data according to an embodiment of the present invention.

FIG. 2 is a diagram showing a motor drive mechanism of the present camera.

FIG. 3 is a diagram showing an angular distribution of a magnetic head moving-out cam and a mechanical charge cam.

FIG. 4 is a circuit diagram for controlling two motors in the present camera.

FIG. 5 is a flowchart showing an operation when a single film is taken by the camera.

FIG. 6 is a diagram showing a state where the magnetic head is retracted.

FIG. 7 is a diagram showing a state in which the magnetic head is in contact with the film.

FIG. 8 is a diagram showing a state in which a release operation is being performed.

FIG. 9 is a diagram showing a state in which mechanical charging is being performed.

FIG. 10 is a flowchart of a one-frame shooting sequence.

FIG. 11A shows standby / release / release in this embodiment.
FIG. 6 is a diagram showing a relationship between each section of the mechanical charge and head withdrawal / retraction, and FIG. 6B is an equivalent diagram according to another example.

FIG. 12 is a side view showing a release state in an embodiment configuration of a charge mechanism section.

FIG. 13 is a side view showing a charge completed state of the same portion.

FIG. 14 is a diagram showing another embodiment of the drive mechanism for operating and not operating magnetic recording.

[Explanation of symbols]

 M1 1st motor (charge motor) M2 2nd motor (feed motor) 13 film 17 magnetic head 18 pad 22 1 rotation cam part 30 magnetic head advance / retreat drive cam 40 mechanical charge cam 50 notch gear for aperture drive

Claims (1)

[Claims] 1. A magnetic head for writing or reading magnetic data to or from a magnetic storage unit on a film, and a magnetic head or a pad facing the magnetic head with a film sandwiched between the magnetic head and the magnetic storage unit. In a magnetic data recording camera equipped with a drive mechanism for writing and reading data and a non-acting position retracted from the film surface, in addition to mechanically charging a shutter, a mirror or an aperture, the above drive mechanism A magnetic data recording camera comprising: a first motor connected to the magnetic head or pad to drive the magnetic head or pad to move back and forth; and a second motor to feed a film.