JPH0531874B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a camera, and more particularly, to a camera comprising an imaging means and recording an image signal on a record carrier through a recording head based on an imaging signal obtained by the imaging means. Regarding the camera.

[Background technology]

Various proposals have already been made regarding the above-mentioned cameras, but in this type of camera, for example, a rotating magnetic disk or drum is used as a record carrier, and a concentric or annular shape is used as the record carrier. If a predetermined amount of image signals, for example, video signals for one field or one frame, are recorded on each recording track through the recording heads while forming recording tracks, unless a multi-head configuration is adopted, An arrangement is required to move the recording head relative to the record carrier.

On the other hand, considering the recent trend of auto-focus in silver-halide film cameras, it seems natural that auto-focus is becoming popular in this type of magnetic recording camera as well. This is a latent demand. In this case, the still camera is an automatic focusing device that includes a power storage means such as a spring, and is configured to drive and focus the photographic lens using the power stored in the power storage means. However, it is advantageous in terms of not impairing the so-called continuous shooting performance of the camera, and also in terms of reducing the price.

[Problem that the invention seeks to solve]

In this way, this type of camera must be equipped with various and disparate operating devices and means depending on its configuration, but here we will explain each of these operating devices and means. If the energizing means and driving sources were arranged separately, the mechanism would be very large and complicated, making it difficult to make the camera smaller and smaller.
This greatly impedes downsizing and increases the risk of malfunction or failure of the device.

[Means for solving problems]

The present invention has been made with the aim of solving the above-mentioned problems, and includes: a focus-adjustable photographic lens; an automatic focusing means for driving the photographic lens to focus it on a subject; an imaging means for converting an image of a subject formed by the photographing lens into an imaging signal corresponding to the image; and a recording head for recording the imaging signal outputted from the imaging means on a rotating record carrier. , head moving means for moving the recording head in a direction perpendicular to the rotational direction of the record carrier to each recording track on the record carrier; and a head moving means for driving the photographing lens in the automatic focusing means. A single driving source for accumulating driving force and operating the head moving means, transmitting the driving force of the driving source to the automatic focusing means and the head moving means, and controlling the recording head by the recording head. Each time a recording operation on the record carrier is completed, a driving force for driving the photographing lens is stored in the automatic focusing means, and the head moving means is driven to move the recording head to the next recording track. The structure includes a drive control means for moving the robot.

[Effect]

This simplifies the configuration of the drive system for the recording head moving means and automatic focusing means, and prevents the internal mechanism from becoming large-scale and complicated.
This can greatly contribute to miniaturization and compactness.

[Explanation based on examples]

Hereinafter, the means taken in the present invention to achieve the above object will be illustrated and explained using Examples.

First, an example of a record carrier used in an embodiment of the present invention will be explained with reference to FIG.

In FIG. 1, reference numeral 1 denotes a flexible magnetic disk as a recording carrier, and a center core 2 is fixed to the center of the disk for connection with a driving spindle, which will be described later. The center core 2 is in pressure contact with the driving spindle at three surfaces 2a, 2b, and 2c of the five surfaces forming the pentagonal opening at the center, and a magnetic material is fixed to the back surface 2d. It is attracted by the magnet provided on the flange of the cage drive spindle. 2e is a magnetic pin for obtaining a rotational phase signal of one pulse per rotation.

Reference numeral 3 designates a cassette that rotatably stores the magnetic disk 1, and has openings 3a and 3 as shown in the figure.
It has b. Further, the cassette 3 is provided with positioning holes 3c and 3d for determining the loading position in the camera-side loading chamber. 3e is cassette 3
This is a write-inhibiting claw provided in the claw 3e.
The camera is constructed so that when the claw 3e remains, information can be written to the magnetic disk 1, and when the claw 3e is removed from the cassette 3, writing of information to the magnetic disk 1 is prohibited.

Reference numeral 4 designates a counter provided on the cassette 3, and has ratchet teeth 4a formed on its outer periphery, with which a locking portion 5 made of an elastic member meshes. This counter 4 is rotated by a predetermined angle (one ratchet tooth) when information is recorded on the magnetic disk 1 and the recording head is moved to the next recording position, as will be described later.
Therefore, the keyway 4c of the counter drive hole 4b indicates the recording track amount or remaining track amount of the magnetic disk 1 on a scale formed on the housing of the cassette 3 according to the phase indicated by the keyway 4c.

Incidentally, concentric recording tracks are formed on the magnetic disk 1 in this embodiment.

Next, FIG. 2 shows one embodiment of the present invention, in particular,
The main parts of the exposure system will be explained.

In Fig. 2, 11 is an example of an imaging means.
It is a CCD solid-state image sensor, and 12 is a shutter board. The shutter substrate 12 has an exposure opening 1.
2a is formed, and behind it is an image sensor 11.
However, the light receiving portion 11a is arranged to face the opening portion 12a. 13 and 14 are shutter leading blades and trailing blades that run vertically in the figure with respect to the opening 12a on the front surface of the shutter board 12, and shafts 15a, 16a and 17a, respectively.
The arms 15, 16 and 17, 18 are rotatably attached to the base plate 12 by 18a and are attached to the ends of arms 15, 16 and 17, 18, which together with the blades 13 and 14 constitute a parallel link mechanism. Also, arms 15 and 17
Springs 15c and 17c for running the blades are applied to the blades, respectively. 67 and 68 are attached to arms 15 and 17 by sucking suction pieces 15d and 17d attached to parts of arms 15 and 17, respectively.
7, and therefore the blades 13 and 14 in the illustrated state,
That is, it is a blade holding electromagnet that holds the springs 15c and 17c in a charged state, and is fixed on the shutter board 12, and both coils are wound around permanent magnets, and when each coil is energized, it becomes a permanent magnet. The suction force of the suction pieces 15d and 17 is eliminated.
A structure is used that releases d.

A shutter charge lever 19 is rotatably attached to the shutter board 12 by a shaft 19d, and its arm 19a engages with an arm 24e of a main drive lever 24, which will be described later. 19c indicates pins 15a and 15 implanted in the aforementioned arms 15 and 17, respectively, upon rotation in the clockwise direction.
b, 17a and 17b, and charges the shutter blade running springs 15c and 17c mentioned above. Reference numeral 21 denotes a movable mirror for the viewfinder, and as is well known, when not photographing (when observing a subject), the light beam from a photographing lens (not shown) is reflected toward the viewfinder. Note that the mirror 21 is rotatable about a shaft 22. Reference numeral 21a denotes a mirror drive pin installed on the side of the mirror 21.

Reference numeral 23 denotes a substrate for supporting levers and the like for driving the mirror, which will be described later. The substrate 23 has a shaft 2
A main drive lever 24 biased counterclockwise by a spring 25 about 4a is rotatably pivoted by the shaft 24a, and a mirror drive lever 28 biased clockwise by a spring 29 Also axis 2
It is rotatably supported by the shaft 4a. The arm portion 28a of the mirror drive lever 28 engages with the mirror drive pin 21a described above, and its counterclockwise rotation causes the mirror 21 to rotate clockwise about the shaft 22. Reference numeral 30 designates a driving lever, which is rotatably supported by a shaft 30a implanted in the arm portion 24b of the main drive lever 24, and biased clockwise by a spring 31 to bend the driving lever 30. Part 3
0b is engaged with the stepped portion 28b of the mirror drive lever 28 in the charging completed state shown in FIG. Reference numeral 26 denotes a tension lever, which is rotatably supported by a shaft 26a implanted in the base plate 23 and biased clockwise by a spring 27.
In the state shown in FIG. 2, the tip step portion 26b is engaged with the arm portion 24c of the main drive lever 24 mentioned above. 3
Reference numeral 2 designates a mirror up release lever, and the release lever 32 is rotatably supported by a shaft 23a embedded in the base plate 23, and is biased clockwise by a spring 33, with one end 32b It engages with an end 62b of a mirror lowering control lever 62, which will be described later, and the other end 32c is formed so that it can engage with one end 30c of the entraining lever 30 when the mirror 21 is in the up position. Furthermore, the board 23 has a shaft 3.
4a, and is rotatably supported by a spring 3.
A charge shaft lock release lever 34, which is biased counterclockwise at 5, is attached. One end 34b of the lever 34 is in contact with one end 60b of a charge shaft locking lever 60, which will be described later, and when the mirror 21 mentioned above rises, the one end 34c is pushed by the mirror drive pin 21a and rotates clockwise. It is configured to do so. 20, when the mirror 21 is completely raised, the contact piece 20a is pushed by the pin 21b implanted on the side of the mirror 21, and the contact piece 2
This is a switch that generates a mirror raising completion signal when it comes into contact with 0b.

Reference numeral 36 denotes a substrate, and the substrate 36 is provided with an electromagnet 37 for starting the raising of the mirror, etc. The electromagnet 37 is composed of a permanent magnet 37a and a coil 37b, and is configured so that the attractive force of the permanent magnet 37a is canceled by energizing the coil 37b. 38 is a charge lever, and the charge lever 38 is connected to a shaft 38 embedded in the base plate 36.
During charging, the tip 38b is pressed against a pin 56c of a main charge lever 56, which will be described later, thereby causing the charge lever 38 to rotate counterclockwise. Note that 38b is the arm portion 24d of the main drive lever 24.
It seems to be engaged with both. 41 is the start
The start lever 41 is rotatably supported by a shaft 41a embedded in the base plate 36;
Further, it is biased clockwise by a spring 42, and a suction piece 43 that is attracted to the electromagnet 37 described above is mounted on one end 41d. Furthermore, the second
In the state shown in the figure, the attraction piece 43 is attracted to the electromagnet 37. Furthermore, the arm portion 41b of the start lever 41 is adapted to engage with a pin 38c implanted in the charge lever 38, and the arm portion 41c is engageable with one end 26c of the tension lever 26. It's summery. Reference numeral 39 denotes an aperture operating lever, and the aperture operating lever 39 is connected to a shaft 39 embedded in the base plate 36.
a and is urged counterclockwise by a spring 40, and a rising portion 39c at one end is connected to the arm portion 28c of the mirror drive lever 28.
is engaged with. As is well known, the falling portion 39b of the diaphragm operating lever 39 narrows down the diaphragm installed in the photographic lens until it reaches a predetermined value.

Reference numeral 51 designates a motor as a drive source for energizing a recording head moving mechanism to be described later and for charging each of the aforementioned mechanisms.The driving force of the motor 51 is transmitted to a gear 53 via a gear train 52. 54
A charge shaft is rotatably supported by a substrate (not shown), and the above-mentioned gear 53, cams 55, 57, 58, and 59 are integrally connected to the charge shaft 54. Reference numeral 56 designates a main charge lever, which is rotatably supported by a shaft 56a and biased counterclockwise by a spring (not shown), and a cam follower implanted in the lever 56. - The pin 56b is configured so as to be in constant contact with the cam 55. Further, a pin 56c is implanted at the tip of the main charge lever 56, and this pin 56c is connected to the arm 38b of the charge lever 38.
come into contact with. Note that the cam 55 rotates clockwise,
When the main charge lever 56 is also rotated clockwise, the charge lever 38 is rotated via the pin 56c.
is rotated counterclockwise.

60 is a charge shaft locking lever;
is rotatably supported by a shaft 65 and biased clockwise by a spring 61, and its distal end locking portion 60a is pressed against the outer periphery of the cam 57. Further, the tail end 60b is connected to the release lever 34 described above.
It is in contact with one end 34b of. Furthermore lever 60
A switch operation pin 60c is implanted near the tail end of the switch, and operates the contact pieces 63a and 64a of the switches 63 and 64 as described later. Reference numeral 57 denotes a cam fixed to the aforementioned charge shaft 54. The cam 57 is provided with a recess 57a, and as shown in FIG. 60a falls into the recess 57a, and the charge shaft 54 is locked. 62 is a mirror lowering control lever rotatably supported by a shaft 65, like the charge shaft locking lever 60 described above, and one end 62a of the lever is pressed against a convex portion 58a of a cam 58 provided on the charge shaft 54. The other end 62b is connected to the arm 32b of the lever 32.
is in contact with. Reference numeral 59 denotes a cam attached to the charge shaft 54, and during its rotation, the protrusion 59a of the cam 59 presses an arm 131b of a pawl drive lever 131 that constitutes a head moving mechanism to be described later.
The lever 131 is rotated counterclockwise about the shaft 131a in FIG. 2. Reference numeral 66 denotes a counter drive shaft interlocking lever, and this lever 66 is connected to the phase of the keyway 4c of the counter 4 of the cassette loaded in the camera (FIG. 1) and the tip boss portion 126a of the camera side counter drive shaft 126 as described later. If the phase of the key 126b (FIG. 5) provided in the
Axis 126 is to the left in Figure 2 (to the right in Figure 4)
By protruding, the tip protrusion 66b is pushed and rotated counterclockwise about the shaft 66a. A pin 66c is implanted at the other end of the lever 66, and when the lever 66 is rotated counterclockwise, the pin 66c presses the one end 60b of the charge shaft locking lever 60, causing the lever to move. 60 forcibly rotated counterclockwise. Therefore, even if the tip locking portion 60a of the lever 60 falls into the recess 57a of the cam 57 as shown in FIG. 2, their engagement is released. 63 and 64 are switches operated by the pin 60c of the lever 60;
and 64, as shown in FIG. 3a, when the end locking portion 60a of the lever 60 falls into the recess 57a of the cam 57, the switch 63 is on and the switch 64 is off, and the locking portion 60a is removed from the recess 57a. When the switch 63 is disconnected, the switch 63 is turned off and the switch 64 is turned on.

In addition, in Fig. 2, 101 indicates the disk and head.
The drive unit and 102 indicate a disk rotation motor, which will be explained in detail later in FIG.

The operation of the exposure mechanism shown in FIG. 2 will now be explained with further reference to FIGS. 3a and 3b.

The electromagnet 37 is in the charging completed state shown in FIG.
When the coil 37b is energized, the attraction of the attraction piece 43 is released, and the start lever 41 is rotated clockwise by the force of the spring 42, and at this time, the arm 41c moves the tension lever 26 counterclockwise. direction. This rotation causes the stepped portion 2 of the tension lever 26 to
6b and the tail end 24c of the main drive lever 24 is released, and the main drive lever 24 is rotated counterclockwise by the biasing force of the spring 25. At this time, the arm 24b releases the pressure on the arm 19a of the shutter charge lever 19. Also, at this time, the stepped portion 28b of the mirror drive lever 28 and the bent portion 30b of the entraining lever 30 remain engaged, so the mirror drive lever 28 rotates counterclockwise together with the main drive lever 24. , the mirror 21 is rotated and raised via a pin 21a implanted in the mirror 21. On the other hand, the aperture operating lever 39 is rotated clockwise by the arm 28c of the mirror drive lever 28, and at this time, the aperture in the photographing lens (not shown) is predetermined at the falling portion 39b, as is well known. Narrow down the search until you reach the desired value. By the counterclockwise rotation of the main drive lever 24, the shutter charge lever 19 is released from the pressure on its arm 19a by the arm 24e of the lever 24, and the arms 15 and 17 are thereby released. rotation, that is, the movement of the blades 13 and 14 becomes possible. When the mirror 21 further rotates upward and reaches its final stop position,
At this time, the pin 21a moves the charge shaft lock release lever 60 through the charge shaft lock release lever 34.
is rotated counterclockwise to release the engagement between the locking portion 60a and the recess 57a of the cam 57. At this point, switch 63 is off and switches 64 and 20 are on.

Next, the arm 15 is released by energizing the coil of the electromagnet 67 in synchronization with the reading cycle of the output from the image sensor 11, and the shutter leading blade 1 is released.
3 is made to run by the force of the spring 15c, and after a predetermined time, the coil of the electromagnet 68 is energized and the arm 17 is released, causing the rear shutter blade 14 to run by the force of the spring 17c. As a result, the image sensor 11 is exposed to light.

When the exposure of the image sensor 11 is completed and the recording of one field or one frame worth of video signals on the magnetic disk 1 based on the output is completed, the motor 51 starts to be energized as described later, and the charge shaft 54 is rotated clockwise. As the charge shaft 54 rotates, the tip 62a of the mirror lowering control lever 62 is first pressed by the convex portion 58a of the cam 58, as shown in FIG. 3b. , clockwise, and at this time, the mirror up release lever 32 is rotated counterclockwise in FIG. 2 at its end 62b. This rotation causes the lever 32 to push down the one end 30c of the entraining lever 30 through its end 32c and rotate the lever 30 counterclockwise, thereby causing the bent portion 30b of the lever 30 and the mirror drive lever 28
The engagement with the stepped portion 28b is released. Accordingly, the mirror drive lever 28 is rotated clockwise by the biasing force of the spring 29, thereby returning the mirror 21 to the position shown in FIG.

On the other hand, since the mirror drive lever 28 rotates clockwise, the aperture operating lever 39 is also returned to the position shown in FIG. 2 by the biasing force of the spring 40.

The motor 51 continues to rotate, and during approximately the first half rotation of the charge shaft 54, the head moving mechanism is energized by the cam 59 as will be described later. Then, when the charge shaft 54 rotates approximately half a turn further and makes exactly one revolution, the state shown in FIGS. 2 and 3a is reached, and the motor 51 stops. Main charge lever 56
is rotated clockwise and its pin 5
6c, the charge lever 38 is rotated counterclockwise, and its tip 38b pushes the main drive lever 24 against its arm 24d, and the pin 38c causes the start lever 41 to push its side. are reset to the state shown in FIG. 2. That is, the start lever 41 is rotated counterclockwise so that its attracting piece 43 is attracted to the electromagnet 37, while the main drive lever 24 is rotated clockwise, as shown in FIG. At the position shown in FIG. The curved portion 30b is the mirror drive lever 2
At this time, the spring 25 becomes charged. At the same time, the arm 19a of the shutter charge lever 19 is rotated clockwise by being pushed by the arm 24e of the main drive lever 24, and at this time, the shutter charge lever 19 is rotated clockwise through its arms 19b and 19c, respectively.
and 17b to rotate the arms 15 and 17 counterclockwise, thereby resetting the shutter blades 13 and 14 and the arms 15, 16 and 17, 18 to the reset position shown in FIG. At this time, springs 15c and 17c become charged. In this reset state, arms 15 and 17 are attracted and held by electromagnets 67 and 68, respectively.

Next, the automatic focusing mechanism will be explained with reference to FIG.

In the figure, 71 is a focusing lens in a photographic lens system having an optical axis O, and 72 is a distance adjustment ring rotatable around the optical axis O. It is connected to the focusing lens 71 via a mechanism, and the focusing lens 7 is connected by rotating the adjustment ring 72.
1 is moved forward and backward along the optical axis O. In this embodiment, the focusing lens 71 is moved back along the optical axis O from the closest focusing position to the infinite focusing position by rotating the adjusting ring 72 clockwise (not shown). A lens moving mechanism is configured. 72a is a distance cam formed on the rear end surface of the adjusting ring 72; 72b is a pin also fixed to the rear end surface of the adjusting ring 72; 73 is a distance cam formed on the rear end surface of the adjusting ring 72; 73 is a distance cam formed on the rear end surface of the adjusting ring 72; This is an adjustment ring drive spring serving as an energy accumulating means that is hung on the adjustment ring 72 to move the adjustment ring 72. 74 is a ratchet tooth provided on the outer periphery of the adjusting ring 72, and 75 is a stopper member rotatably supported by a shaft 75a, which has a claw portion 75b for engaging with the ratchet tooth 74. , and spring 76
Accordingly, the claw portion 75b is urged clockwise around the shaft 75a, that is, in the direction in which the claw portion 75b engages with the ratchet tooth 74. Reference numeral 77 denotes an electromagnet consisting of a coil 77b wound around an iron core 77a, and when it is energized, it attracts the bent portion 75c of the stopper member 75 to rotate the stopper member 75 counterclockwise against the spring 76. The claw portion 75a and the ratchet tooth 7
4 to release the engagement.

A sweep lever 78 is rotatably supported by a shaft 78a, and a cam follower pin 78b fixed to the tip of one arm of the sweep lever 78 is connected to the adjustment ring 72.
The spring 7 is in contact with the distance cam 72a at all times.
9 in a clockwise direction about a shaft 78a, and supports a light-emitting element (here, a light-emitting diode) 80 on a raised part 78c provided at the tip of the other arm. Reference numeral 82 denotes a light projection lens fixedly arranged in front of the light emitting element 80 in order to project the light emitted from the light emitting element 80 toward a subject, and 83 represents a predetermined base line in the lateral direction with respect to the light projection lens 82. A light-receiving lens 81 is fixedly arranged across the length of the light-receiving lens, and 81 is a light-receiving element (here, a silicon photo cell) arranged approximately at the focal point of the light-receiving lens 83 to receive light from the light-receiving lens 83. ), and has a light-receiving sensitivity that shows a peak at the emission wavelength of the light-emitting element 80. still,
Distance cam 72 formed at the rear end of the adjustment ring 72
a is that when the adjustment ring 72 is rotated clockwise, the sweep lever 78 is rotated clockwise under the action of the spring 79, and at this time the light emitting element 80 is displaced clockwise, so that the projection It is formed in such a shape that the chief ray of the light beam projected through the optical lens 82 is continuously swept from the closest object that can be photographed by this camera to an infinitely distant object. Further, the lens 82,
Reference numeral 83 is fixedly arranged so that each optical axis thereof is substantially parallel to the optical axis O of the photographing lens.

84 is a gear attached to the lowermost end of the charge shaft 54 explained in FIG. 2; 85 is a gear having the same diameter and the same number of teeth as the gear 84 and meshing with the gear 84;
86 is a gear coaxially integrated with the gear, and 87 is the gear 8.
The gear 86 is a pinion gear that meshes with the pinion gear 87, and the gear 86 has a notch 86 in a part thereof for releasing the mesh with the pinion gear 87, and the locking lever 60 of the charge shaft 54 explained in FIG. In the locked state, the notch 86a is connected to the gear 85 so as to face the pinion gear 87 as shown in the figure. 8
Reference numeral 8 denotes a slide member having a rack portion 88a that meshes with the pinion gear 87, and a pin 89 engaging with the slot 88c, so that it can slide left and right in the figure. Rear end pin 72
When the charge shaft 54 is rotated clockwise to move the hook portion 88b to the right in the figure, the hook portion 88b can be engaged with the hook portion 88b.
and the adjustment ring 72 through engagement with the pin 72b.
is rotated counterclockwise against the spring 73 until the most distal tooth portion 74a of the ratchet tooth 74 is locked by the claw portion 75b of the stopper member 75. At this time, the spring 73 is charged. Note that the slide member 88 is biased to the left in the figure by a spring 90 applied between the pin 88d and the pin 89. 91 is a stopper pin for the adjusting ring 72, and pin 7 of the adjusting ring 72
2b abuts against the stopper pin 91, the focusing lens 71 is stopped at the infinity focus position.

92 is a camera release button; 93 is a release rod integrated with the release button 92;
93a is a pin inserted so as to pass through the release rod 93 from the side; 94 is a pin 93;
A spring 95 urges the release rod 93 upward through a, and a release switch 95 is turned on by a pin 93a when the release rod 93 is pressed down.

The operation of the automatic focusing mechanism having the above configuration will now be explained.

First, when the charge is completed as shown in the figure, press the release button 92 to release the release rod 93 from the spring 9.
4, the release switch 95 is turned on at this time, and an automatic focus circuit, which will be described later, is activated. The autofocus circuit drives the light emitting element 80 and excites the electromagnet 77 by energizing the coil 77b of the electromagnet 77, so that the light emitting element 80 emits light and the stopper member 75 moves the electromagnet 77. , and is rotated counterclockwise against the spring 76. Therefore, the distance adjustment ring 72 is rotated clockwise by the acting force charged in the adjustment ring drive spring 73 in order to release the locking of the tooth portion 74a at the tip of the ratchet tooth 74 by the stopper member 75. As a result, the focusing lens 71 is moved from the closest focusing position to the infinity focusing position, and the sweep lever 78 is also rotated clockwise. As a result, the light emitting elements 80 are rotated in a sweeping manner in the same direction. Then, in the process of moving the lens 71 and sweeping the light emitting element 80, when the autofocus circuit detects the peak of the reflected light based on the output of the light receiving element 81, that is, the in-focus position on the lens 71, it cuts off the power to the electromagnet 77. As a result, the stopper member 75 is released from the attraction by the electromagnet 77, and thus engages the ratchet teeth 74 under the action of the spring 76, thereby stopping the rotation of the adjusting ring 72. In this way, the photographic lens can be brought into focus on the subject.

When the focus adjustment of the photographic lens is completed, the focus adjustment completion signal from the automatic focus circuit initiates the release of the exposure mechanism, which begins with energization of the electromagnet 37 in FIG. 2, which will be described later. .

Next, when the photographing is completed and the charge shaft 54 is rotated clockwise, the slide member 88 is slid to the right against the spring 90 through the gears 84 to 86, and at this time, the adjustment ring 72 is moved to the right. The pin 72b is pushed by the hook portion 88b of the slide member 88, causing it to rotate counterclockwise, thereby moving the focusing lens 71 toward the closest focusing position. At this time,
The sweep lever 78 is rotated counterclockwise against the spring 79, and the adjusting ring drive spring 73 is charged. When the charge shaft 54 rotates exactly once, the notch 86a of the gear 86 faces the pinion gear 87, so the slide member 8
8 returns to the left sliding position shown in the figure by the force of the spring 90, and therefore the adjusting ring 72 tries to rotate clockwise by the spring 73.
At this time, since the electromagnet 77 is de-energized, the claw portion 75b of the stopper member 75 comes to engage with the tooth portion 74a at the tip of the ratchet tooth 74, and therefore, the adjustment ring is held at the reset position shown in the figure. It becomes like being done. This completes charging the automatic focusing mechanism.

Next, referring to FIG. 5, the above-mentioned disk and head drive unit 10 including the head moving mechanism will be explained.
Let me explain about point 1.

In the figure, reference numeral 105 denotes a recording magnetic head, which is brought into contact with the magnetic disk 1 described above.
The magnetic head 105 is inserted into the hole 1 of the carriage 106.
06c, and the carriage 106
The disk is moved toward the center of the disk rotation spindle 103. Incidentally, the spindle 103 is connected to the rotating shaft of the disk rotation motor 102 shown in FIG. A permanent magnet 104 is attached. A rail 107 has a V-groove for guiding the carriage 106, and faces the V-groove provided on the side of the carriage 106 via a ball 108. A return spring 110 is hung on the carriage 106 via an arm member 109, and the arm portion 106a of the carriage 106
A cam follower 111 provided at the cam follower 111 applies an urging force so as to press against the cam surface of a cam 122, which will be described later.

121 is a ratchet wheel having ratchet teeth on its outer periphery; a cam 122; a cylindrical member 12;
3. Pinion gear 124 and pulley 12
5, and is rotatably disposed on the substrate of the disk and head drive unit 101 (FIG. 2). 126 is a counter drive shaft, and a key 126b formed on the boss portion 126a is fitted into a slit 123a provided in the cylindrical member 123 described above, and also fitted into a keyway 4c of the counter 4 of the cassette 3. It's becoming possible. Furthermore, the counter drive shaft 12
6 has its central shaft passing through the aforementioned ratchet ring 121, and its tail end reaches the back side of the pulley 125, making it movable in the axial direction. The drive shaft 126 is biased by a spring 127 toward the open end of the cylindrical member 123, that is, to the left in the figure (in the protruding direction). It is prevented from falling out. Therefore, the drive shaft 126 is connected to the key 12
6b and the keyway 4c of the counter 4 on the cassette 3 side are pushed to the right against the spring 127. When the phases match, the spring 12
The key 126b and the keyway 4c engage with each other with an acting force of 7. The counter drive shaft interlocking lever 66 of FIG. 2 responds to such axial displacement of the drive shaft 126.

128 is connected to the pulley 12 via the wire 129
5. Therefore, it is a spring that applies a clockwise biasing force to the ratchet wheel 121. Incidentally, at the time of resetting, which will be described later, the pin 121a installed in the ratchet wheel 121 comes into contact with the stopper 139 and is regulated.

A slide plate 140 is guided by a shaft 141 in the elongated hole and is movable in the direction of the elongated hole, and a part thereof has a rack portion 140b that meshes with the aforementioned pinion gear 124. Carriage 10
It has a carriage anti-vibration pin 140a that fits into an elongated hole 106a provided in 6. As will be described later, when the ratchet wheel 121 rotates counterclockwise, the slide plate 140 moves downward in the figure.

Reference numeral 131 designates a pawl drive lever, which is biased counterclockwise around a shaft 131a by a spring 132, and has a feed pawl 135 rotatably supported on a shaft 135a at one end thereof. ing. Note that 136 is a spring that biases the feed pawl 135 in the counterclockwise direction, and 133 is a spring that biases the pawl drive lever 13.
1 is a stopper for the feed claw 135, and 134 is a stopper for the feed claw 135. Further, the other end of the pawl drive lever 131 is formed as a bent portion 131b, and is connected to the charge shaft 5 described in FIG.
4 is driven by the motor 51 and makes one rotation clockwise, the bent portion 131b is pressed by the cam 59 and rotated clockwise about the shaft 131a,
The ratchet wheel 121 is rotated counterclockwise via the drive pawl 135. 137 is a locking pawl, which is attached to the shaft 13.
It is rotatably supported by a shaft 7a and biased counterclockwise by a spring 138, and is locked by engaging with the ratchet teeth of the ratchet wheel 121.

Here, the cam 122 corresponds to the feed amount of one tooth of the ratchet wheel 121 by one rotation of the charge shaft 54.
If the cam lift amount is set to be one track pitch on the magnetic disk 1, the head 105 will be moved one track pitch each time the cam 59 rotates once.

Reference numeral 142 denotes a reset lever, which is rotatable around a shaft 142a, and a pin 142b formed at one end of the lever is lowered in conjunction with, for example, opening of the cassette loading chamber cover of the camera or removal of the cassette 3. the operating member 146, and
The other end 142c is the protrusion 1 of the locking claw release lever 143.
43c. Locking claw release lever 143
is guided by the shaft 143a in the elongated hole, and in the figure,
It is movable in the vertical direction, and the pin 143b implanted therein is connected to one end 137b of the locking claw 137.
It is possible to engage with. Reference numeral 144 denotes a drive claw release lever, which is rotatable around a shaft 144a, and is driven by a spring 1.
45 in the counterclockwise direction, and normally a pin 144b implanted at one end presses the terminal end 143d of the aforementioned locking pawl 137. Also, a pin 144c implanted in the drive claw release lever 144
can be engaged with the drive claw 135.

147, when the head 105 is further moved by one track pitch beyond the final recording position within the predetermined recording area on the disk 1, the contact piece 147a is moved by the pin 121a of the ratchet wheel 121.
This is an end detection switch disposed so as to be turned off when the switch is separated from the contact piece 147b.

The operation of the disk and head drive unit 101 including the head moving mechanism having the above configuration is as follows.

First, the cassette 3 shown in FIG. 1 is loaded into a cassette loading chamber (not shown) formed close to the top of the head carriage 106. At this time, a cassette loading detection switch (to be described later) is turned on, and the cassette loading chamber 3 is turned on. Center of magnetic disk 1 in cassette 3
The core 2 is fitted into the disk drive spindle 103 in its center hole until its back surface abuts and is regulated by the flange portion 103a of the spindle 103, and is mounted. At this time, the magnetic material attached to the back surface of the center core 2 is attached to the flange portion 103.
It is attracted to the permanent magnet 104 attached to a,
Further, the head 105 enters the opening 3a of the cassette 3 and comes into contact with the disk 1. Also, this cassette 3
As the reset lever 142 is loaded, the operating member 146 releases the pin 142b of the reset lever 142.

When the cassette 3 is loaded into the camera as described above, the ratchet wheel 121 is in the reset position shown, and therefore the carriage 106 and the head 10
5. The slide plate 140 and the carriage anti-vibration pin 140a attached thereto are also in the reset position shown. Also, at this time, the keyway 4c of the counter 4 of the loaded cassette 3 and the counter drive shaft 126
If the key 126b is not in phase with the key 126b, the drive shaft 126 is pushed to the right against the spring 127 as the key 126b is pressed against the lower surface of the counter 4. As a result, the counter drive shaft interlocking lever 66 is rotated counterclockwise, and at this time,
In FIG. 2, the charge shaft locking lever 60 is rotated counterclockwise by the pin 66c, and the locking portion 60a of the lever 60 locks the cam 57 and therefore the charge shaft 54. Release. Further, the rotation of the lever 60 at this time turns off the switch 63 and turns on the switch 64. When a power switch, which will be described later, is turned on in this state, the charge motor 51 shown in FIG. 2 is energized, and the charge shaft 54 is rotated clockwise in FIG. Then, when the charge shaft 54 is rotated clockwise, the claw drive lever 131 is pushed by the bent portion 131b by the cam 59 attached to its tip during approximately half a rotation in the first half, and is rotated clockwise. As a result, the feed pawl 135 attached to the tip of the lever 131 rotates the ratchet wheel 121 counterclockwise by one ratchet tooth thereof. As a result, the head carriage 106 is moved to the right in the figure by the cam 122 by a cam lift amount corresponding to one tooth rotation of the ratchet wheel 121.
As a result, the head 105 is moved, for example, from the reset position to a position corresponding to the first recording track within a predetermined recording area of the disk 1. The ratchet wheel 121 is rotated by one ratchet tooth by the driving pawl 135 and then held by the locking pawl 137.

On the other hand, with the rotation of the ratchet wheel 121, the counter drive shaft 126 is also rotated integrally with it, and at the movement position of the head 105, its key 126b and the keyway 4c of the counter 4 of the cassette 3 are rotated. When the phases match, the boss portion 126a and the key 126b fit into the hole 4b and the key groove 4c of the counter 4 under the action of the spring 127 and become engaged. If the phase of the keyway 4c of the counter 4 and the key 126b of the drive shaft 126 does not match because the disk 1 has already recorded up to an area in the middle, the interlocking lever 66 and therefore the locking lever 60 are still Since the switch 63 is in the state of being rotated counterclockwise, the switch 63 remains off, which causes the motor 5 to turn off.
1 is maintained, and the motor 51 continues to rotate. When the motor 51 rotates during this time, the exposure mechanism and automatic focusing mechanism explained in FIGS. 2 and 4 have already been charged, so the second
The main charge lever 56, the mirror lowering control lever 62, the mirror up release lever 32 shown in the figure, and the slide member 88 shown in FIG. do not have. By the rotation of the cam 59 caused by the rotation of the motor 51, only the stepwise feeding of the head 105 and the indexing rotation of the counter drive shaft 126 are performed as described above.

In the above manner, the head 105 is fed incrementally and the counter drive shaft 126 is indexed and rotated so that the phase of the key 126b of the drive shaft 126 matches the phase of the keyway 4c of the counter 4 on the cassette 3 side. At this point, the drive shaft 126 is displaced to the left in FIG. 5 due to the acting force of the spring 127, and its boss portion 126a and key 126b come to fit into the drive hole 4b and key groove 4c of the counter 4. . As the drive shaft 126 is displaced at this time, the interlocking lever 66 rotates clockwise in FIG.
Charge shaft locking lever 60 with its pin 66c
The pressure on one end 60b of is released. As a result, the locking lever 60 locks the concave portion 57a of the cam 57 with its tip locking portion 60a under the action of the spring 61, and therefore, the charge shaft 54 is locked. Also, at this time, the switch 63 is turned on, thereby stopping the motor 51. In this case, after the above head feeding and counter drive shaft indexing rotation by the cam 59 are completed, the recess 57a of the cam 57 is removed.
The mutual mounting angle of the cams 57 and 59 on the charge shaft 54 or the locking portion 60a of the lever 60 is such that the cams 57 and 59 face the locking portion 60a of the lever 60.
The location is determined.

When the rotation of the charge shaft 54 is stopped as described above, the head 105 faces the unrecorded track immediately after the recorded track on the disk 1. Therefore, when the camera is released in this state, the automatic focusing mechanism and then the exposure mechanism operate as described above to focus the photographic lens, and then expose the image sensor 11. Next, based on the image pickup signal obtained from the image pickup device 11, a video signal for one field or one frame is recorded on the unrecorded track on the disk 1 through the head 105. Note that when recording one field or one frame of video signals based on the NTSC system, the disk 1 is moved by the motor 102.
It can be rotated at 3600 rpm (field recording) or 1800 rpm (frame recording).

As described above, when exposing the image sensor 11, as shown in FIG. 60 is rotated counterclockwise to release the locking of the cam 57 by the locking portion 60a, the motor 51 is started at the same time as the recording of the video signal onto the magnetic disk 1 is completed, according to the configuration described later. Then, the charge shaft 54 is rotated clockwise. As previously explained with reference to FIG. 2, first, the mirror lowering control lever 62 is rotated clockwise by the cam 58, and thereby the mirror raising release lever 32 is rotated counterclockwise. Therefore, the mirror 21 is lowered. Then, during approximately the first half rotation of the charge shaft 54, the pawl drive lever 131 is actuated by the cam 59 as described above, and the head 105 is moved to the next track position and the teeth of the counter 4 are advanced as described above. . Then, during approximately the second half rotation of the charge shaft 54 in FIG. 2, the main charge lever 56 is rotated clockwise by the cam 55, and the exposure mechanism is charged or reset as described above. . Of course, as mentioned above, when the charge shaft 54 has made exactly one rotation,
The charge shaft 54 is locked by the locking portion 62a of the locking lever 62 engaging with the recessed portion of the cam 57, and at this time, the motor 51 is also stopped by turning on the switch 63. Further, while the charge shaft 54 makes one revolution, the automatic focusing mechanism is also charged as explained in FIG. 4.

In this way, during one rotation of the charge shaft 54, the head feeding mechanism is energized during approximately the first half rotation, and the exposure mechanism is charged or reset during approximately the subsequent half rotation. This configuration is effective in distributing the load on the motor 51, thereby reducing its torque, extending its life, and reducing its power consumption. On the other hand, in this case,
As explained in FIG. 4, the charging system of the automatic focusing mechanism is configured so that it is charged using approximately one rotation of the charge shaft 54, but considering the load on the motor 51, By changing the diameter of the gear 86 and the dimensions of its notch 86a in FIG. 4, the automatic focusing mechanism can be charged while the head 105 moves during the first half of the rotation when the load is relatively light. Alternatively, the cams 55 and 59 for the charge shaft 54
Depending on the mounting angle and the design of the gear 86, the movement of the head 105, the charging of the exposure mechanism, and the charging of the automatic focusing mechanism may all be performed in a time-sharing manner.

Incidentally, when the recording operation as described above is repeated to finish recording on the last track within a predetermined recording area on the disk 1, and then the head 105 is moved to a further track position,
At this point, the end detection switch 147 is turned off by the pin 121a of the ratchet wheel 121, and then the charge shaft 54 rotates exactly once and is locked by the locking lever 60, and the switch 6 is turned off.
4 is turned off, power is cut off to all circuits of the camera, and the camera stops operating, regardless of whether the power switch is turned on, as will be described later.

Also, when the lid of the cassette loading chamber is opened or the cassette 3 is taken out to take out the cassette 3 from the camera, at this time, the operating member 146 in FIG.
To lower the reset lever 142, the reset lever 142 is rotated counterclockwise. As a result, the locking claw release lever 143 is raised so that its pin 1
43b rotates the locking pawl 137 clockwise to release it from the ratchet wheel 121, and since the drive pawl release lever 144 is rotated clockwise as the lever 143 rises, its pin 144
c, the drive pawl 135 is rotated clockwise to separate it from the ratchet wheel 121. When the cassette 3 is taken out and the engagement between the counter 4 and the counter drive shaft 126 is released, the ratchet wheel 121 becomes free and the pin 121a is moved to the stopper 139 by the action force of the spring 128.
The counter drive shaft 126 is rotated clockwise together with the counter drive shaft 126 until it is regulated by colliding with the counter drive shaft 126 and returned to the reset position. Also, at this time, pinion gear 12
4 is also rotated clockwise, the slide plate 140 is raised, and therefore the head carriage 106 is also rotated clockwise by the action of the spring 110.
2 and pin 140a.

Next, the electric circuit system of the camera having the above mechanical configuration will be explained with reference to FIG.

In the figure, 201 is an imaging signal processing circuit (video processing circuit) that processes the imaging signal output from the imaging device 11 in a well-known manner, and 202 modulates the video signal output from the imaging signal processing circuit 201. ,
A recording processing circuit 203 processes the recording signal for recording, a gate circuit 204 gates the recording signal output from the recording processing circuit 202, and 204 gates the recording signal gated by the gate circuit 203 to the head 10.
5 is a recording circuit for recording on the magnetic disk 1, and 205 is a timing signal generation circuit that generates various vertical and horizontal synchronization signals or timing signals, the output of which is sent to the processing circuits 201 and 202. granted. Reference numeral 206 designates the image sensor 11 based on the output of the timing signal generation circuit 205.
207 is a timing control circuit that controls the shutter operation timing and signal recording timing based on the vertical synchronization signal V _D from the timing signal generation circuit 205 in response to turning on the second illustrated switch 20. The output of the circuit is applied to the gate circuit 203, a motor control circuit for controlling the operation of the charge motor 51, a motor control circuit for the disk rotation motor 102, and a shutter control circuit, which will be described later. 2
08 is the output of the timing control circuit 207, the output of an inverter (described later) whose output changes from high to low when the second illustrated switch 63 is turned on, and the output from the first power up clear circuit (described later) when the power is turned on. Power up clear signal
A motor control circuit 209 controls the operation of the charge motor 51 based on the PUC 1, and a motor drive circuit 209 drives the motor 51 under the control of the motor control circuit 208. Furthermore, 210 and 211
2 and 4 are conceptual diagrams showing an exposure system charge mechanism and a head moving mechanism energized by the motor 51 described in FIGS. 2 and 4, respectively. 212 is a motor control circuit for controlling the rotation of the disk rotation motor 102, which connects the FG signal (rotation tacho signal) from the motor 102 and the center core 2 of the disk 1.
Based on the output of the rotational phase detector 213, which generates one pulse per rotation of the disk 1 by detecting the magnetic pin 2e provided on the magnetic pin 2e, and the vertical synchronization signal V _D from the timing signal generation circuit 205, As mentioned above, disk 1 is 3600rpm (or
The motor 102 is controlled so as to rotate at a speed (1800 rpm) and a predetermined phase (that is, it has a speed servo and a phase servo).

214 is a battery as a power source; 215 is the aforementioned cassette loading detection switch that is turned on in response to loading of the cassette 3;
The power supply battery 214 is connected to the power supply battery 214 through a parallel connection circuit. 216 is a battery switch connected in series to the detection switch 215; 217 is a switching circuit for controlling power supply to required circuits;
Reference numeral 218 is a falling synchronization type RS-flip-flop that controls the switching circuit 217, and 219 and 220 turn on the power in response to turning on the power switch 216 and turning on the switching circuit 217, respectively.
first and second power up clear circuits outputting up clear signals PUC1 and PUC2;
221 is the first power up clear circuit 21
222 is an AND gate that receives the output of the delay circuit 221 and a signal that becomes high when the switch 63 is turned on;
3 receives the output of the AND gate 222 and the output of an inverter to be described later whose output changes from high to low when the switch 63 is turned on.
gate, whose output is the flip-flop 2 above.
18 set inputs S. The flip-flop 218 is configured to be reset by the power-up clear signal UC1 from the first power-up clear circuit 219, and the switching circuit 217 is reset by the power-up clear signal UC1 from the first power-up clear circuit 219.
It is connected so that it is turned on when the Q output of the flop 218 is high.

224 and 225 are inverters connected so that their output changes from high to low when the switches 63 and 95 change from off to on, respectively, and the output of the inverter 224 is connected to the motor control circuit 208 and OR gate 223. Additionally, the output of the inverter 225 is applied to an autofocus circuit.
Reference numeral 226 denotes the above-mentioned autofocus circuit, which is triggered by the fall of the inverter 225 to drive the light emitting element 80 and energize the coil 77b of the electromagnet 77, and also detects the peak of the output of the light receiving element 81. At this time, it has a configuration of a known active autofocus circuit of the so-called infrared projection type, which cuts off the power to the coil 77b and stops driving the light emitting element 80. Note that the autofocus circuit 226 includes a coil 77b.
While the power is being applied to the output terminal 226a, a signal that is maintained high is output from the output terminal 226a. 227 is the second
It is reset by the clear signal UC2 from the power up clear circuit 220 and the fall of the output of the OR gate 228 which receives the potential at the connection point between the release switch 95 and the resistor connected thereto. , 229 is a fall synchronized R-flip-flop connected to be set by the fall of the output signal from the output terminal 226a of the autofocus circuit 226; for a predetermined duration in response to the falling edge of the output signal, i.e., the second illustrated electromagnet 37
A one-shot circuit 230 outputs a single pulse with a period sufficient to release the attraction piece 43 of the lever 41 when the permanent magnet 37a is energized to the coil 37b. an excitation circuit that energizes the coil during
31 determines the exposure time as a digital value based on a luminance signal from a TTL photometric element 232 disposed in the well-known viewfinder optical path and digital preset aperture value data from a preset aperture value data input circuit 233. A well-known digital exposure time determining circuit 234 responds to and stores the low output of flip-flop 227.
is a shutter control circuit that controls the running timing of the second illustrated shutter leading blade 13 and the second shutter blade 14 based on the timing signal from the timing signal generating circuit 207 and the exposure time data from the exposure time determining circuit 231; Controls energization of the coil 67a of the leading blade holding electromagnet 67 and the coil 68a of the trailing blade holding electromagnet 68 shown in the figure.

In the above configuration, 51, 63, 208, 20
9, 218 and 221 to 224 are connected to the power supply battery 2 by turning on the power switch 216.
14 directly, i.e. the switching circuit 21
7, while 11, 2
Circuit elements indicated by 0, 95, 102, 201 to 207, 212, and 225 to 234 are connected to be supplied with power through a switching circuit 217. Also, the power up clear circuit 2 in Figure 2
Power up clear signal from 20 PUC2
is also provided to circuits other than the OR gate 228, such as 205 to 207 and 231.

Here, specific configurations of the timing control circuit 207, motor control circuit 208, and shutter control circuit 233 will be specifically explained with reference to FIG.

First, the timing control circuit 207 includes three falling synchronized D-flip-flops 301, 302, and 303 connected in series and an AND gate 3.
It consists of 04. 3 flip flops 30
1 to 303 are all power up clear signals from the second power up clear circuit 220.
The flip-flop 301 is reset by the PUC 2 and is connected to be triggered by the fall of the vertical synchronizing signal V _D from the timing signal generation circuit 207. It is connected so that its D input receives the potential at the connection point with the connected resistor.
AND gate 304 receives the Q output of middle-stage flip-flop 302 and the output of final-stage flip-flop 303, and its output is applied to gate circuit 203. In addition, flip flop 3
Each output of 02 and 303 is sent to the shutter control circuit 2.
33 and motor control circuit 208 as a timing control signal.

Next, the motor control circuit 208 connects the OR gate 31
1 and 314, a delay circuit 312, an AND gate 313, and a falling synchronous RS-flip-flop 311. The OR gate 311 receives the power up clear signal PUC1 from the first power up clear circuit 219 and the output of the inverter 224, and its output is a flip-up clear signal PUC1.
It is applied to the reset input R of the flop 315.
The delay circuit 312 delays the clear signal PUC1 by a small amount of time, the AND gate 313 receives the output of the delay circuit 312 and the output of the inverter 224, and the OR gate receives the output of the AND gate 313. The output from flip-flop 303 in timing control circuit 207 is applied to the set input of flip-flop 315. and the flip-flop 315
The Q output of is given to the motor drive circuit 209 as a control signal.

Next, the shutter control circuit 234 includes one-shot circuits 321 and 328, excitation circuits 322 and 32
9, an oscillation circuit 323, a counter 324, a digital comparator 325, an inverter 326, and an AND gate 327. One-shot circuit 321 outputs a single pulse in response to the falling edge of the output of flip-flop 301 in timing control circuit 207, and excitation circuit 322 responsively outputs a single pulse during the high period of this pulse. By energizing 67a, the shutter leading blade 13
Release the button. On the other hand, the counter 324 is reset by the high output of the flip-flop 301, and is enabled for counting by the low output, and counts the output clock of the oscillation circuit 323. Then, the comparator 325 converts the count value (A) of the counter 324 into the exposure time determining circuit 2.
31, and when the two match (A=B), the "A=B" output is made high.
The "A=B" output is inverted by an inverter 326 and applied to an AND gate 327 receiving the output of flip-flop 302 in timing control circuit 207. As will be understood from the explanation below, the counter 324, the comparator 325, and the inverter 326 control the shutters 13 and 1 based on the output data of the exposure time determining circuit 231.
Configure a circuit to control the opening time of 4, and at that time,
AND gate 327 is timing control circuit 20
Timing signal from 7 (flip-flop 3
This circuit constitutes a circuit that defines the long-term upper limit of the shutter opening time to a period corresponding to one field of a video signal, that is, 1/60 second in this case, based on the output of 02. One-shot circuit 328 outputs a single pulse in response to the fall of the output of AND gate 327, and excitation circuit 329 responds by energizing coil 68a during the high period of this pulse. The rear shutter blade 14
Release the button. Note that the one-shot circuits 321 and 328, similar to the one-shot circuit 224 in FIG.
The time constant etc. of No. 4 are selected so as to output a single pulse that maintains a high level for a period sufficient to release the attraction and holding by the permanent magnet.

Next, the operation of the electric circuit system having the above configuration will be further explained with reference to FIG.

First, when the cassette 3 is loaded into the camera, the detection switch 215 is turned on, and when the power switch 216 is turned on in this state (FIG. 8a), the power source battery 214 outputs 51, 63, 208, 209,
Power is supplied to circuit elements 15, 218, 219, 221 to 224, thereby causing the first power up clear circuit 219 to output a power up clear signal PUC1 as shown in FIG. 8b.
Then, by this clear signal PUC1, the flip
Flop 218, flip-flop 315 in motor control circuit 208, etc. are reset. Here, if the phase of the key 126b of the counter drive shaft 126 and the phase of the keyway 4c of the counter 4 of the cassette 3 do not match, the switch 63 is off, and the flip-flop 315 sends a clear signal.
After the delay time (Δt) by the delay circuit 312 has elapsed since the reset by the PUC1, it is set by its output and its Q output becomes high as shown in FIG. 8d. As a result, the motor drive circuit 209 starts the charging motor 51, and thus the head 105 is moved by the head moving mechanism 211 as described above.

As described above, the driving of the motor 51 is continued until the phase of the key 126b of the counter drive shaft 126 matches the phase of the keyway 4c of the counter 4 of the cassette 3 and the two are engaged. and drive shaft 12
When the phases of the key 126b of No. 6 and the key groove 4c of the counter 4 match and they engage, at this time, the
As shown in Figure c, the switch 63, which had been off until then,
is turned on, the flip-flop 315 is reset and its Q output becomes low, as shown in FIG. 8d, so that the motor 51 is stopped. When the switch 63 is turned on, the flip-flop 218 is set and its Q output becomes high as shown in FIG.
20,95,102,201-207,212,
Power is now supplied to circuit elements 220, 225-234. At this time, the second power up
The clear circuit 220 is connected to the power supply as shown in FIG. 8f.
The up/clear signal PUC2 is outputted, thereby causing the circuits shown as 205 to 204, 227, 231, etc. to be reset. Therefore, motor 1
02, the rotation of the disk 1 is started, and the imaging system is activated although it is in a non-exposure state, and the recording processing circuit 202 sends the recording signal to the gate circuit 20.
It will be output for 3. At this time, the timing signal generation circuit 205 outputs the vertical synchronization signal V _D to the timing control circuit 207 and the motor control circuit 212 as shown in FIG. 8g. Also, at this time, as shown in Figure 8j, the flip
When the output of the flop 227 becomes high, the exposure time determining circuit 231 determines the appropriate exposure time based on the output of the photometric element 232 and the preset aperture value data from the aperture value data input circuit 233.

In this state, when the release switch 95 is turned on by the release operation (Fig. 8h), the output of the inverter 225 changes from high to low, and the autofocus circuit 226 is triggered, as shown in Fig. 4. As explained above, automatic focus adjustment of the photographic lens is performed, and when this is completed, the output of the output terminal 226a of the automatic focus circuit 226, which went high with the trigger, changes to low, as shown in FIG. 8i. Become. This triggers the flip-flop 227 as shown in FIG.
31 stores or holds the determined exposure time at that point, while the one shot circuit 2
29 outputs a single pulse as shown in FIG. 8k, and in response, the excitation circuit 230 energizes the coil 37b of the electromagnet 37. As a result, the aperture is narrowed down and the mirror 2
When the mirror 21 is raised completely, the switch 63 is turned off as shown in FIG. 8c, and the switch 20 is turned on as shown in FIG. 8l. When the switch 20 is turned on, the flip-flop 301 at the first stage in the timing control circuit 207 is triggered by the fall of the vertical synchronizing signal V _D immediately after that, as shown in FIG. The output changes from low to high, and from high to low. and,
Due to the fall of the output at this time, the one shot circuit 321 in the shutter control circuit 234 is activated as shown in FIG.
As shown in FIG. 2, a single pulse is output, and in response, the excitation circuit 322 energizes the coil 67a of the electromagnet for holding the shutter leading blade, so that the leading shutter blade 13 runs as explained in FIG. Image sensor 11
The exposure will now begin. Also, since the output of the flip-flop 301 goes low, the counter 324 in the shutter control circuit 234 also goes low.
is released from the reset state and starts counting the output pulses of the oscillation circuit 323. and,
The exposure time previously determined by the exposure time determination circuit 231 is shorter than 1/60 second, and therefore, after the flip-flop 301 is triggered, the counter 324 is activated before 1/60 second has elapsed. count value of
When (A) comes to match the output data (B) of the exposure time determining circuit 231, at this point the comparator 3
25's "A=B" output changes from low to high,
Therefore, as shown in FIG. The output of 302 is finally high as shown in FIG. 8p). As a result, the one-shot circuit 328 outputs a single pulse as shown in FIG. As explained in FIG. 2, the rear shutter blade 14 moves and the exposure of the image sensor 11 is completed.

On the other hand, if the exposure time determined by the exposure time determination circuit 231 is 1/60 seconds or more, the timing control circuit 207 triggers the first stage flip-flop 301 and then outputs the next vertical synchronization signal.
V _D triggers the flip-flop 302 to change its Q output from low to high and from high to low as shown in FIGS. 8o and 8p. At this time, as the output changes from high to low, the output of the AND gate 327 changes from high to low in the shutter control circuit 234, so that the one-shot circuit 328 becomes simple as shown by the broken line in FIG. A pulse is output, and therefore, at this point, the shutter rear blade 14 starts running, and eventually,
In this case, the exposure time of the image sensor 11 will be limited to 1/60 second. Incidentally, the broken line in FIG. 8t shows an example of the change in the output of the inverter 326 in this case.

Now, when the Q output of the flip-flop 302 becomes high, the output of the AND gate 304 in the timing control circuit 207 becomes high, as shown in FIG. When reading the image signal obtained by the image sensor 11 during the exposure period, a recording signal based on the read image signal is sent from the recording processing circuit 202 to the recording amplifier 204 via the gate circuit 203.
Eventually, the data will be recorded on one track of disk 1 through head 105. Thereafter, the flip-flop 303 in the timing control circuit 207 is triggered by the next vertical synchronization signal V _D and its output becomes low as shown in FIG. The output becomes low, which turns off the gate circuit 203 and ends recording.

On the other hand, when the output of the flip-flop 303 changes from high to low, the flip-flop 315 in the motor control circuit 208 is set as shown in FIG. 51 is activated, the head moving mechanism 211 moves the head 105 to the next track position, and the exposure system charge mechanism 212 charges the exposure mechanism and the automatic focusing mechanism. Then, the charge shaft 54 is exactly 1
When the switch 63 is turned on as shown in FIG. 8c, the flip-flop 315 is reset and its Q output becomes low as shown in FIG. 8d, thereby stopping the motor 51.

To perform the next photograph, it is sufficient to turn off the release switch 95 and then turn it on again. That is, when the release switch 95 is turned off, the flip-flop 227 is reset and its output goes high again, which causes the exposure time determining circuit 231 to operate again to determine the appropriate exposure time. When the release switch 95 is turned on, the autofocus circuit 226 operates to focus the photographic lens, and upon completion of this, the flip-flop 227 is triggered and its output becomes low, thereby exposing the camera as described above. The time determining circuit 231 stores or holds the determined exposure time data, and the one shot circuit 229 outputs a single pulse to release the mirror 21. On the other hand, at this time, the timing control circuit 207
Now, by turning off the switch 20 in conjunction with the reset of the mirror 21 by the rotation of the charge motor 51, the Q output of each of the flip-flops 301 to 303 is low and the output is high. When the mirror 21 is raised and the switch 20 is turned on again as described above, the travel timing of the shutter blades 13 and 14 and the on/off control of the gate circuit 203 are controlled by the above-described operations. As described above, upon completion of recording, the charging motor 51 is activated to reset the mirror 21, move the head 105 to the next track position, and charge the exposure mechanism thereafter. .

Furthermore, if the power switch 216 is turned off while the motor 51 is stopped, the camera will be powered off with the preparation for the next photograph completed. In this case, the power switch 216 is turned on again, and then
By sequentially turning on the release switch 95, the next photograph can be taken through the above-described operations. Here, in this case, the power switch 216
When the switch 63 is turned on, the switch 63 is already in the on state, and therefore the output of the inverter 224 is low, so the flip-flop 315 in the motor control circuit 208 receives the power up clear signal.
Although it remains reset by PUC 1, it is not set, and therefore motor 51 is not started. or,
Since the switch 63 is on, the flip
Flop 218 is the power up clear signal.
After being reset by PUC1, delay circuit 2
Therefore, in this case, the switching circuit 217 is turned on after the delay time by the delay circuit 221 has elapsed from the power up clear signal PUC1, 20,95,102,20
Power supply to the circuit elements shown by 1 to 207, 212 and 225 to 234 is started.

Incidentally, when the recording at the last track position in the predetermined recording area on the disk 1 is completed and the head 105 is actually moved to the next track position, at this time, the end detection switch is activated as explained in FIG. 1
47 is turned off, and thereafter, charging of the exposure mechanism is completed and the charge shaft stop lever 60 stops the charge shaft 54, so that the switch 6 is turned off.
4 is turned off, power supply to all circuits is stopped regardless of whether the power switch 216 is turned on, and therefore, the camera comes to stop at this point.

One embodiment of the present invention is as described above, but here, in the embodiment described above, particularly in the configuration of the electric circuit system shown in FIG. 6, the counter drive shaft 126 on the camera side When the phase of the key 126b and the phase of the keyway 4c of the counter 4 on the side of the cassette 3 loaded in the camera do not match, power is supplied exclusively to the charging motor 51 and its accompanying circuit elements. , and only when the phases of the two match and the two engage, power is supplied to the main circuit elements of the camera for focusing the photographic lens, exposure time, imaging, recording, and driving the disk, making it possible to take pictures. However, this is useful in terms of so-called power saving and prevention of unnecessary operations, and is particularly effective in the case of a camera that uses a battery as a power source as in the embodiment.

As understood from the above description, in the above embodiment, the members shown at 72 to 83 in FIG. 4 and the autofocus circuit 226 in FIG. At this time, the adjustment ring drive spring 73 constitutes a storage means for accumulating force for driving the photographing lens. Also, 106 to 1 in Figure 4
Elements 11 and 121 to 138 constitute the head moving means, and further elements 51 to 56 and 59 in FIG. 2 and elements 84 to 90 in FIG. 4 attach the head moving means. and constitutes an energizing mechanism for accumulating energy in the energy accumulating means,
At this time, the motor 51 constitutes a driving source.

Further, in the above embodiment, an example of a well-known infrared projection type active type automatic focusing device is shown, but there are other examples of such automatic focusing devices, such as those disclosed in Japanese Patent Application Laid-open No. Needless to say, various devices such as a passive device as shown in Japanese Patent No. 55-115023 are applicable.

Now, in the embodiment described above, one photograph is taken each time the release switch 95 is turned on, but the camera of the present invention allows such single-shot photographing (hereinafter referred to as This is extremely useful not only when shooting is carried out repeatedly at a predetermined frame rate (hereinafter referred to as continuous shooting) as long as the release switch 95 is kept on (hereinafter referred to as continuous shooting). It is suitable.

An example of such a case will be explained with reference to FIG. Incidentally, FIG. 9 shows an example of a circuit added to the circuit shown in FIG. 6, which is required to enable switching between the single shooting mode and the continuous shooting mode.

In the figure, 235 is the inverter 224 in FIG.
An AND gate 236 is connected to receive the output of the AND gate 235 and the potential at the connection point between the release switch 95 and the resistor connected thereto. 237 is connected to the output of the AND gate 235 and the inverter 2 shown in FIG.
25, and here the output of the OR gate 237 is applied as a trigger signal to the autofocus circuit 226 in FIG. 6 instead of the output of the inverter 225. connected to.

The only changes to the circuit shown in FIG. 6 are as described above.

Now, for such a configuration, first of all, single shot mode S
And gate 2 is set by switch 236 in
OR gate 237 so that the output of 35 is maintained low to ground, and thus the autofocus circuit 22
6 responds only to the output of the inverter 225, and therefore, as in the case of the circuit of FIG. 6, one photograph is taken each time the release switch 95 is turned on.

On the other hand, in continuous shooting mode C, switch 23
6 causes the output of AND gate 235 to be ungrounded, so that OR gate 237 and, therefore, autofocus circuit 226 respond to both the output of inverter 225 and the output of AND gate 235. That is, as explained in FIG.
When the release switch 95 is turned on while the inverter 225 is turned on, the autofocus circuit 226 is triggered by the fall of the output of the inverter 225 to take a picture.
If the switch 95 is kept on, the charging motor 51 is started after the first photographing is completed, and the mirror 21 is reset as described above, the head 105 is moved to the next track position, and the exposure mechanism and When the automatic focusing mechanism is charged and the switch 63, which was turned off at the time of release, is turned on as shown by the dashed line in Fig. 8c, the output of the inverter 224 in Fig. 6 changes from high to low. Since the output of the AND gate 235 changes from high to low, and since the output of the inverter 225 remains low at this point, the output of the OR gate 237 changes from high to low. In FIG. 8i, the autofocus circuit 226 is triggered again, as shown by the dashed line, and photographing is performed again. This operation continues as long as the release switch 95 is kept on, and photography is thus performed in continuous shooting mode C. Incidentally, the dash-dotted lines in FIG. 8 indicate the input and output of each circuit in continuous shooting mode C. Of course, if the release switch 95 is turned off during the process, the current shooting will be completed, and the camera will stop with the above-mentioned preparations for the next shooting completed. By the way, in this continuous shooting mode C, the 8th
As shown by the dashed line in FIG. J, the output of the flip-flop 227 remains low, so the exposure time is fixed at the value determined at the time of the first photographing. Further, in this case, the frame speed, that is, the number of shots per unit time, is determined exclusively by the rotational speed of the motor 51 and the time required for the operation of the mechanism. Therefore, in this case, for example, the rotation speed of the motor 51 may be made variable to make the frame speed during continuous shooting variable.

〔effect〕

As described in detail above, according to the present invention, the camera is equipped with an actuating means for controlling the exposure state of the movable recording head and the imaging means, and the recording head moving means and the automatic focusing device are energized for the auxiliary force accumulating means. The structure of the system is simplified, and the internal mechanism structure does not become large-scale or complicated. This greatly contributes to making the system smaller and more compact, and prevents failures and problems of each device. This reduces the risk of malfunction, and is extremely useful for this type of camera.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a record carrier used in an embodiment of the present invention together with its storage container;
FIG. 2 is a perspective view showing the mechanical structure of the main part of the exposure system according to an embodiment of the present invention, and FIGS. 3a and 3b show the charging shaft and FIG. 4 is a perspective view showing the mechanical configuration of an automatic focusing mechanism according to an embodiment of the present invention; FIG.
The figures are a perspective view showing the mechanical structure of a disk and head drive unit according to an embodiment of the present invention, FIG. 6 is a circuit block diagram showing the structure of an electric circuit system according to an embodiment of the present invention, and FIG. The figure is a circuit block diagram showing specific examples of the timing control circuit, charge motor control circuit, and shutter control circuit in the circuit system shown in Figure 6, and Figure 8 shows the main circuits of the circuit system shown in Figures 6 and 7 during operation. FIG. 9 is a timing chart showing input/output, and is a partial circuit diagram showing an example of a circuit to be added to the circuit system shown in FIG. 6 in order to enable switching between single shooting mode and continuous shooting mode. 1... Recording medium, 11... Imaging means, 72-8
3,226... Components of automatic focusing device (73 is energy storage means), 105... Recording head, 10
6-111, 121-138... Components of head moving means, 51-56, 59, 84-90...
Components of the energizing mechanism (51 is a drive source), 102...
... Record carrier driving motor, 202 ... Recording processing circuit, 203 ... Recording gate circuit, 207 ... Timing control circuit, 208 ... Charge motor control circuit, 231 ... Exposure time determining circuit, 234
... Shutter control circuit, 37, 67, 68 ... Electromagnet, 20, 63, 64, 147, 95, 21
5,216,236...Switch.

Claims (1)

[Scope of Claims] 1. A photographic lens whose focus is adjustable; automatic focusing means for driving the photographic lens to focus it on a subject; and an image of the subject formed by the photographic lens. a recording head for recording the imaging signal output from the imaging means on a rotating record carrier; and a recording head arranged perpendicularly to the rotational direction of the record carrier. head moving means for moving the head in a direction to move the head to each recording track on the record carrier; storing a driving force for driving the photographing lens in the automatic focusing means; a single drive source for operating the recording medium; and transmitting the driving force of the drive source to the automatic focusing means and the head moving means, each time the recording head completes a recording operation on the record carrier. Drive control means for accumulating a driving force for driving the photographing lens in the automatic focusing means and driving the head moving means to move the recording head to the next recording track. Featured camera.