JPH0792976B2 - Recording or playback device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a recording or reproducing apparatus, and more particularly to a recording or reproducing apparatus using a rotating recording medium.

(Prior Art) For example, various devices are known that record or reproduce information using a recording medium such as a rotating magnetic sheet. In such an apparatus, it is necessary to surely attach the connecting portion of the recording medium to the rotary drive shaft on the apparatus side. That is, if the recording medium is not properly mounted, the recording track is eccentric with respect to the rotation axis, and for example, when the recorded recording medium is reproduced by another reproducing device, the recording track cannot be traced well. Such a situation may occur. If the recording medium and the head are not properly attached, the contact between the recording medium and the head will not be performed properly, and the conversion of signals between the recording medium and the head will be hindered. May occur.

As a method for eliminating the above-mentioned drawbacks, the coupling portion of the recording medium may be press-fitted into the device-side rotation drive shaft,
Conventionally known is a mounting method for reducing the above-mentioned eccentricity by, for example, tapering the rotary drive shaft. In such a mounting method, for example, as a means for positioning the recording medium at a predetermined position, a permanent magnet is arranged on the rotary drive shaft, and a magnetic material is provided at the corresponding position of the coupling portion of the recording medium. , The suction force between the two positions the coupling portion of the recording medium to a predetermined position with respect to the rotation drive shaft, and when the recording medium is loaded, the coupling portion of the recording medium is forced against the rotation drive shaft. A mechanism provided with a pressing unit that is pushed into a predetermined position to rotate integrally with the recording medium at the time of recording or reproducing or to maintain a contact state. However, in the case of the former method using a permanent magnet, it is necessary to increase the attractive force of the permanent magnet sufficiently, so that the volume of the permanent magnet must be increased and an expensive rare earth material must be used. In addition, in the case of a recording medium such as a magnetic sheet, increasing the attractive force of the permanent magnet is limited because it has a magnetic effect on the recording / reproducing of information. Further, in the latter mechanism for pressing the recording medium forcibly with respect to the rotation drive shaft to rotate integrally with the recording medium or to maintain the contact state, the accuracy of rotation of the recording medium is Is greatly unfavorable, and is not suitable for a recording or reproducing apparatus using a small rotating magnetic sheet.

By the way, in this type of device, in consideration of speeding up the recording / reproducing operation, immediately after the recording medium is securely attached to the rotary drive shaft, the recording or reproducing head is immediately moved to a predetermined position. That is, it is very convenient if it is located at a position where signal recording or reproduction can be performed immediately. In particular, in a still image recording device such as a still video camera, it is very useful in that the chance of recording (corresponding to a so-called shutter chance) referred to as a camera is less likely to be missed. .

(Purpose) The present invention has been made in view of the above-mentioned circumstances, and is characterized in that it is a rotary drive that is coupled to a coupling portion provided in the central portion of a recording medium and rotates the coupling portion. Means, a recording or reproducing head for recording or reproducing a signal on or from the recording medium, a head moving means for moving the head with respect to the recording medium, and a detachable position for receiving the recording medium. Recording medium transfer means for transferring the recording medium to a predetermined loading position capable of being coupled to the rotation driving means and capable of recording or reproducing a signal by the head, and the recording medium transfer means by which the recording medium is attached or detached. From the recording medium to the loading position, the coupling portion of the recording medium is temporarily pressed against the rotation driving means to couple it, and the pressing is performed after the coupling operation is completed. When the transfer of the recording medium from the attachment / detachment position to the loading position by the pressing unit for releasing the recording medium and the recording medium transfer unit is completed, the recording medium transfer unit is locked to load the recording medium into the loading position. Holding means for holding the recording medium to the loading position, and the recording medium transfer means to move the recording medium to the loading position, and the pressing means presses the coupling portion in response to the movement of the recording medium transfer means. After the operation is completed, the pressing operation is released, and the detecting means for detecting that the locking means has completed the locking of the recording medium transfer means, and the head movement based on the output of the detecting means. Means for controlling the head to move the head to the next recording or reproduction start position on the recording medium and actuating the rotation driving means to rotate the recording medium to a standby state. Recording / reproducing apparatus using a rotating recording medium, particularly recording / reproducing using the recording medium with its coupling part coupled to the rotation driving part of the rotation driving means. As a device, the position of the recording or reproducing head is controlled immediately after the recording medium is securely attached to the rotation driving unit, so that the signal recording or reproducing operation can be speeded up.

(Explanation by Examples) Hereinafter, means taken in the present invention in order to achieve the above object will be described by way of examples.

First, referring to FIG. 1, in FIG. 1, reference numeral 1 denotes a cassette as a recording medium storage container in which a rotating magnetic sheet 2 as a recording medium is stored. At the center of the magnetic sheet 2, there is provided a center core 3 as a connecting portion formed of synthetic resin or the like, and a magnetic body (not shown) is fixed to the lower surface of the center core 3. The cassette 1 is provided with upper and lower openings 1a and 1b, into which a stabilizing plate (described later) for stabilizing the rotation of the seat 2 can be inserted. The magnetic head 5 for recording or reproducing is attached to the sheet 2 from the opening 1b on the lower surface side.
Abutted against. Reference numeral 6 denotes a spindle, which is rotationally driven by a seat rotation motor (not shown), as a rotational drive unit for the seat 2. When the lower surface of the center core 3 comes into contact with the flange portion 6a of the spindle, the magnetic sheet 2
Is defined with respect to the head 5. Spindle 6
A permanent magnet 7 is provided on the flange portion 6a of the above and attracts a magnetic body (not shown) provided on the center core 3 described above. 1c and 1d are openings on the upper and lower surfaces of the cassette 1 corresponding to the center core 3.

The fitting portion of the center core 3 with respect to the spindle 6 is formed by the two inclined surface portions 3b and the spring portion 3a. When the cassette 1 is mounted, the center portion of the center core 3 is fixed to the spindle 6 by the spring portion 3a. It is attached so that the sloped part 3b of the above contacts. Then, the spindle 6 is pressed by the pressure contact force between the center core 3 and the spindle 6 and the attractive force of the permanent magnet 7.
The sheet 2 and the sheet 2 are integrally connected and rotated, and recording / reproduction of a signal is performed by the head 5 described above.

Reference numeral 4 denotes a counter having a ratchet tooth on the outer periphery thereof as a recording amount or remaining amount display member, and a hole 4a for engaging a counter driving connecting shaft 8 provided on the recording or reproducing device side at the center thereof. A keyway 4b is provided so as to be continuous therewith. Key portion provided on the key groove 4b and the drive connecting shaft 8
8a engages. An elastic clip stop member (not shown) as a positioning member is provided so as to engage with the ratchet teeth on the outer circumference. Here, one pitch of the ratchet teeth on the outer circumference of the counter 4 is set so as to correspond to one recording track / pitch on the magnetic sheet 2, and the connecting shaft 8 of the moving mechanism for the magnetic head 5 is described later. It is configured to rotate in relation to the head movement operation. The connecting shaft 8 has a key portion 8a and a display member 4
When they are in phase with the key groove 4b, they are engaged with each other, and a switch that is turned on / off in association with the vertical movement of the connecting shaft 8 at this time is provided. 1e and 1f are openings on the upper and lower surfaces of the cassette 1 corresponding to the counter 4, and a recording track number scale 1 is provided around the opening 1e on the upper surface side.
g is formed, the counter 4 has the key groove 4b, the scale 1g
The track number is displayed depending on the position relative to.

In the mounting method of the magnetic sheet 2 as described above, when the pressure contact force between the spring portion 3a and the inclined surface portion 3b of the center core 3 and the spindle 6 is large, the attraction force by the permanent magnet 7 causes the center core 3 to be flanged. In some cases, pressure contact up to 6a may not be possible. This is because it is affected by the dimensional accuracy of the spindle 6 and the center core 3, the finish state, the temperature, etc. However, if the mounting is incomplete, the head 5 and the seat 2
This may cause an accident such that the recording / reproducing performance of the signal is extremely deteriorated due to the poor contact with the sheet 2, or the sheet 2 is damaged by the stabilizer described later.

On the other hand, after mounting the magnetic sheet 2 on the spindle 6,
If the magnetic head 5 is immediately moved to a predetermined position for recording or reproduction and the rotation of the spindle 6 is started, recording or reproduction can be performed immediately when a recording or reproduction start signal is issued. It's very convenient. In particular, considering the start-up time of the motor for rotating the spindle 6 and the like, starting the seat rotation motor immediately after mounting the seat is beneficial in terms of time saving.

Next, an embodiment of the present invention will be described with reference to FIG.

First, the cassette loading and magnetic sheet mounting mechanism in this embodiment will be described with reference to FIGS.

Referring to FIG. 2, in the same figure, 11 indicates a main body of the recording or reproducing apparatus, and the main body of the spindle 6 is mentioned above.
A permanent magnet 7, a display member driving connecting shaft 8 and a head 5 are rotatably and movably provided, respectively.
Further, the main body 11 is provided with a hinge shaft 12. 16 is the main body
11 is a side plate provided on the side plate 16. A shaft 17 is erected on the side plate 16, and a tightening lever 18 to which a biasing force is applied to the shaft 17 in a clockwise direction by a spring 19 is rotatable. It is provided. Further, a pair of pins 20 are erected on the same side plate 16, and two lock levers 21 and 23 which are slidable by being guided by the pins 20 are provided by springs 22 and 24 urged to the left in the figure. ing. Incidentally, 41 and 42 are spring hooking pins for the springs 22 and 24, which are planted in the side plate 16.

Reference numeral 31 is a holder as a cassette receiving portion, and the holder 31 is rotatably attached to the main body 11 about the hinge shaft 12 by the hinge portion 31e thereof.
The holder 31 is provided with an opening 31f for receiving the above-mentioned cassette 1 at one end, and the cassette 1 is inserted through the opening 31f. The openings 31a and 31b provided in the holder 31 are for inserting stabilizers 37 and 15 which will be described later, respectively, and the openings 31c and 31d are for inserting the spindle 6 and a pressing spring 38 which will be described later, respectively. It is for.

The opening 31g provided on the lower surface side is an opening for inserting the contact piece 51a of the cassette sensing switch 51 and the connecting shaft 8 provided in the main body 11 described above. Further, the circular opening 31h provided on the upper surface side allows the counter 4 of the cassette 1 to be observed together with the scale 1g on the upper surface of the cassette 1.

Reference numeral 35 denotes an outer casing member, that is, an outer cover, and the outer cover 35 is rotatably attached to the main body 11 about the hinge shaft 12 by the hinge portion 35a. Lock pins 36a, 36b are planted on the tip side surface 35c of the outer cover 35, and a hook member 40 for the holder 31 is provided. The outer cover 35 is a counter 4 of the cassette 1.
A protective glass 45 is fitted with a circular opening for making it possible to observe with the scale 1g on the upper surface of the cassette 1. 37
Is an upper stabilizer attached to the ceiling part of the outer cover 35, and vibration and deformation when the seat 2 is rotated by vertically inserting the seat 2 together with the lower stabilizer 15 provided on the main body 11 side. Prevent. In this case, each stabilizer 37,1
Their positions are set so that an appropriate air layer is formed between the sheet 5 and the sheet 2. The head 5 is a lower stabilizer.
It projects through an opening 15a provided at the center of 15. 38 is a T-shaped leaf spring whose tail end 38b is fixed to the ceiling portion of the outer cover 35 by means of a screw or the like and is a T-shaped leaf spring, and its tip 38a projects downward as shown. The protrusion 38a is arranged so as to come to the upper part of the spindle 6 in a state where an initial force is applied by the position regulating member 39 fixed to the ceiling portion of the outer cover 35.

The spring 13 arranged on the hinge shaft 12 is the holder 31 described above.
The arms are applied to the outer cover 35 and the outer cover 35, respectively, and a rotational force in the opening direction is applied between them. Further, one arm of the spring 14 is brought into contact with the main body 11 and the other arm thereof is brought into contact with the outer cover 35, thereby imparting a counterclockwise rotating force to the outer cover 35.

Switches 51 and 52 are provided on the main body 11, and when the cassette 1 is inserted in the holder 31, the switch 51 has its contact piece 51a, 51a, at the position of the holder 31 shown in FIG. It is a cassette sensing switch that closes 51b, and switch 52 is a switch control arm of the lock lever 23.
23d is a seat attachment completion detecting switch which is an example of a center / core pressing release detecting means for pressing the contact piece 52a by 23d and closing the contact pieces 52a, 52b in the state shown in FIG. 7 described later.

In this structure, in order to load the cassette 1, the outer cover 35 is rotated counterclockwise about the hinge shaft 12 by the urging force of the spring 14 with respect to the main body 11 and opened. , One end 35b thereof is brought into contact with the main body wall 11a to be stopped. In this case, the holder 31 is pressed by the biasing force of the spring 13.
Tries to rotate clockwise with respect to the outer cover 35,
The hook member 40 provided on the outer cover 35 allows the outer cover 35 to be restrained at the position shown in FIG.

Here, the states of the levers provided on the side plate 16 will be described. When the outer cover 35 and the holder 31 are opened as shown in FIG. 3, as shown in FIG. The hook portion 18b of 18 and the claw portion 21d of the lock lever 21 are engaged with each other. Also, the bent portion 21 of the lever 21
c and one end 23c of the lock lever 23 are in contact with each other, so that both lock levers 21 and 23 are locked at the positions displaced to the right against the springs 22 and 24, respectively. . or,
Claws 21a and 23 provided on both lock levers 21 and 23
a, 21b and 23b are locks planted in the outer cover 35.
It is located outside the movement trajectory of the pins 36a and 36b. In this state, the contact pieces 52a and 52b of the attachment completion detection switch 52 described above are open.

Returning to FIG. 3 again, the opening portion of the holder 31 in the illustrated state
When the cassette 1 is inserted from 31f and the outer cover 35 is rotated clockwise about the hinge shaft 12 against the biasing force of the spring 14, the holder 31 also rotates about the hinge shaft 12 in the same direction. ,
At the position corresponding to the cassette mounting and seat mounting completion position shown in FIG. 5, the spindle 6 is opened by the opening 31c of the holder 31.
Through the center hole of the center core 3 of the seat 2, and the lower stabilizer 15 and the upper stabilizer 37 are also holders, respectively.
It enters into the openings 1b and 1a of the cassette 1 through the openings 31b and 31a of 31. Then, at this time, the outer cover 35 is attached to the fourth
As shown in the drawing, when the sheet spring is further pushed in the direction of arrow F from the position corresponding to the cassette mounting and seat mounting completion position shown in FIG. 5, the leaf springs provided on the outer cover 35 at this time.
The center core 3 of the seat 2 is formed by the protruding portion 38a of the tip 38.
Will be urged toward the spindle 6 side. At this time, the quantitative difference between the pushing stroke of the outer cover 35 and the required pushing amount of the center core 3 is absorbed as the bending of the leaf spring 38. If the cassette 1 is inserted into the holder 31 as described above, the contact pieces 51a and 51b of the cassette sensing switch 51 are pressed by the cassette 1 and closed in the states shown in FIGS. Of course, when the cassette 1 is taken out, it remains open.

As shown in FIG. 4, when the outer cover 35 is pushed in, of the lock pins 36a, 36b which are planted in the outer cover 35, the pin 36b pushes down the tail end 18a of the tensioning lever 18 and springs the lever 18. 1
By rotating the shaft 17 counterclockwise around 9 against the shaft 9, the engagement between the hook portion 18b and the claw portion 21d of the lock lever 21 is released. Due to this disengagement, the lock lever 21 travels leftward by the biasing force of the spring 22, and at this time, the claw portions 21a and 21b thereof are positioned above the lock pins 36a and 36b, respectively. After that, when the pushing of the outer cover 35 is released, the outer cover 35 tries to rotate counterclockwise about the hinge shaft 12 by the urging force of the spring 14, but at this time, the lock pin
36a and 36b and the claw portions 21a and 21b of the lock lever 21 are engaged with each other to prohibit the rotation thereof. At this time, the lock lever 23 is moved to the left by the biasing force of the spring 24.
It runs until it is regulated by the bent portion 21c of 21 and its claw portion 23
The a and 23b and the lock pins 36a and 36b are engaged as shown in FIG. That is, the outer cover 35 is fixed to the main body 11 at this point. In this state, the switch control arm 23d of the lock lever 23 detects the attachment completion switch 5
The two contact pieces 52a, 52b are closed, and the tip 38a of the leaf spring 38 provided on the outer cover 35 cuts off the contact with the center core 3 as shown in FIG. In this state, the spindle 6 is securely engaged.
Can be rotated by the rotation of.

Incidentally, in order to take out the cassette 1, the bent portion 21e of the lock lever 21 protruding from the slot-like opening 16 of the side plate 16
7 against the springs 22 and 24 by pushing it to the right in FIG. 7 so that the lock lever 21 is locked by the tightening lever 18 as shown in FIG. 6, whereby the lock lever 23 is locked. It will not be necessary to explain in detail that the outer cover 35 and the holder 31 are brought into the state of FIG. 3 by the action of the springs 13 and 14 while the switch 52 is returned to the original position and the switch 52 is opened.

In FIGS. 3 to 5, reference numeral 43 denotes a positioning member for the cassette 1 provided at the bottom inside the holder 31. For this positioning member 43, for example, at the ceiling portion of the outer cover 35, the outer cover is provided. A holder is provided with a leaf spring 44 or the like for pressing the cassette 1 toward the positioning member in relation to the closing of 35.
The cassette 1 can be surely positioned with respect to 31.

Now, in the configuration of the cassette loading and the magnetic sheet mounting mechanism described above, the seat formed by the protrusion 38a of the leaf spring 38 provided on the outer cover 35 in the cassette loading and seat mounting completion state shown in FIG. Since the bias of the center core 3 of 2 is released, the rotation of the sheet 2 for recording / reproducing does not have any adverse effect. The position of the pin 35 is restrained in both the opening direction and the closing direction by holding the pins 36a, 36b between the two locking levers 21, 23 by locking the pins 36a, 36b. Even if an external force is applied to the outer cover 35 in the state where the cassette loading seat is completely attached, the outer cover 35 remains immovable, and the adverse effect of this external force on the seat 2 and the center core 3 can be prevented. Outside hippo -35 lock is the cover 35
As shown in FIG. 4, it is not evoked unless it is further pushed in beyond the position corresponding to the cassette loading seat mounting completed state in FIG. 5, and in the further pushing, the center of the seat 2 by the leaf spring 38 is pushed. Since the biasing of the core 3 in the direction of the spindle 6 is induced, the coupling between the center core 3 and the spindle 6 can be surely guaranteed, and the permanent magnet 7 of the spindle 6 can be secured by this. The advantage is that it can be made small, or can be made completely unnecessary.

Here, as a modification of the cassette loading and the seat device mechanism described above, for example, the holder 31 is omitted, and instead of this, the shape of the cassette 1 is formed in the space sandwiched by the hinge shaft 12 of the main body 11 and the side plate 16. A fixed cassette receiving portion may be formed by a frame body having a shape conforming to the above, and the cassette 1 may be thrown into the receiving portion. In that case, for example, the outer cover 35 has its ceiling portion. An elastic member such as a leaf spring, sponge, or soft rubber is attached to the
It is possible to provide the cassette 1 so as to press the cassette 1 against the main body 11 in the locked state of the outer cover 35 so that the cassette 1 can be held in a fixed state with respect to the main body 11. Further, in this case, it is possible to add a means for ejecting the cassette 1 from the receiving portion of the main body 11, which can be manually operated or interlocked with the opening operation of the outer cover 35. .

Next, regarding the magnetic head moving mechanism and its control circuit,
It will be explained with reference to FIG.

First, referring to FIG. 8, in the figure, 5 is the above-mentioned magnetic head, and the head / carrier 46 fixed to the head / carrier 46 via the head mounting substrate 9 has a sliding ball 48. Supported by the guide rail 47 through
It is possible to move along the rail 47, and the magnetic sheet 2
The head 5 can be moved in the direction of a spindle 6 for rotating the head. A cam follower is attached to the tip of the arm portion 46a of the head carrier 46 via a shaft 46c.
49 is rotatably mounted. Further, the head carrier 46 is provided with a spring 50 through a spring hooking portion 46b thereof in the figure,
It is biased upward. Incidentally, 46d is an elongated hole for allowing the spindle 6 to escape. Reference numeral 8 denotes the counter driving connecting shaft, which is not shown in the drawing because it is concentrically and integrally rotated with the cam 51 and the ratchet gear 52 as head moving members and is also movable in the axial direction. It is biased by a spring so as to project toward the counter 4 on the cassette 1 side. Therefore, the connecting shaft 8 axially escapes downward until the key groove 4b of the counter 4 and the key portion 8a of the counter 4 are in phase with each other. ,Or later,
The counter 4 can be driven. Although not shown here, an engagement detecting switch that is turned on or off when the connecting shaft 8 is correctly engaged with the counter 4 is provided for the connecting shaft 8.

The above-described cam follower 49 is in contact with the outer cam surface of the cam 51. The ratchet gear 52 is provided with ratchet teeth 52a on its outer peripheral portion, and is further provided with a restoring force in the clockwise direction by a restoring spring 53. Reference numeral 54 is a control pawl as a positioning means for the connecting shaft 8 and the cam 51. A counterclockwise biasing force is applied by a spring 56 about the shaft 55, and the tip pawl portion 54a thereof has a ratchet-type.
It engages with the ratchet teeth 52a of the gear 52. Reference numeral 57 denotes a drive claw, which is rotatably supported by a shaft 58 provided at one end of the drive lever 60, and is urged clockwise by a spring 59. The tip claw portion 57a is an arrow-shaped ratchet.
It can be engaged with the ratchet teeth 52a of the gear 52. The drive lever 60 is capable of moving up and down in the figure by engaging with the pin 61 in its long hole 60b, and
It is urged downward in the figure by a spring 62. Incidentally, in the state shown in the figure, the tip of the drive claw 57 comes into contact with the pin 65 to stop.

An arm member (movable suction piece) 63 of a plunger 64 is connected to the arm portion 60a of the drive lever 60. Incidentally, here, the moving mechanism for the head 5 is constituted by the elements indicated by 46 to 64 described above.

In such a structure, when the plunger 64 is energized, the armature 63 is absorbed, so that the drive lever 60 moves upward in the drawing through the arm portion 60a thereof, and at this time, the drive claw 57 causes the ratchet to move. The gear 52 is rotated counterclockwise against the return spring 53. At that time, the inclined portion of the drive claw 57
57c and the pin 66 come into contact with each other to restrict the upward movement of the drive claw 57, thereby preventing the ratchet gear 52 from rotating more than necessary.

When the plunger 64 is de-energized, the drive lever 60 and drive pawl 57
The spring 62 returns to the position shown in the figure, but at this time, the ratchet gear 52 is held by the control pawl 54 at a position moved by one ratchet tooth 52a. If the lift amount of the cam 51 with respect to the rotation of the ratchet tooth 52a by one tooth is set to the head movement amount of one track / pitch on the magnetic sheet 2, the head 5 moves by one track / track by the movement of the head / carrier 46. The stepwise movement is performed for each pitch. At this time, the connecting shaft 8 is also rotated counterclockwise.
The ratchet tooth 52a of the gear 52 is rotated by one tooth. Therefore, if the connecting shaft 8 is connected to the counter 4 on the cassette 1 side at this time, the counter 4 is also counterclockwise. -One tooth of the ratchet tooth 52a of the gear 52 will be rotated. Then, at this time, the pitch of the ratchet teeth (not shown) on the outer circumference of the counter 4 is changed to the ratchet gear.
When the counter 4 is aligned with the pitch of the 52 ratchet teeth 52a, the counter 4 at the stepping position has an elastic click, not shown.
It is positioned by a stop member, and at that position, the track position at that time is indicated by the position of the key groove 4b with respect to the scale 1g on the upper surface of the cassette 1.

To return the head moving mechanism to the initial position, for example, the pin 67 is moved downward in FIG. 8 in association with the rightward sliding of the lock lever 21 in FIG. 7, and the control pawl is moved. By pressing one end 54b of 54 and one end 57b of the driving claw 57, the control claw 54 is rotated clockwise and the driving claw 57 is rotated counterclockwise, respectively.
Rotate against the ratchet teeth of the ratchet gear 52
The engagement with 52a is released. Where the ratchet gear 52
Since the connecting shaft 8 is still engaged with the counter 4 on the cassette 1 side by simply disengaging the control pawl 54 and the drive pawl 57 from the control claw 54 (that is, the engagement of the click / stop member acting on the counter 4). Since the stopping force is a strong acting force of the return spring 53 acting on the ratchet gear 52, the connecting shaft 8
(There is no clockwise rotation), but there is no change in the mechanism shown in FIG. 8, but the outer cover 35 and the holder 31 are closed by sliding the lock lever 21 to the right. The lock in the state is released, and these are released by the action of the springs 13 and 14. At this time, since the counter 4 of the cassette 1 and the connecting shaft 8 are released from each other, the connecting shaft 8 is unloaded. Accordingly, the springs 53 and 50 return the ratchet gear 52, the cam 51 and the connecting shaft 8, and the head carrier 46 to their initial positions, respectively. Incidentally, the initial position of the head 5 which is returned at this time is further moved to the outer peripheral side by one track / pitch when the outermost track of the recording area of the magnetic sheet 2 is set as the first track. It is a predetermined position. Further, as will be understood from the above, when the cassette 1 is taken out from the recording or reproducing apparatus, the counter 4 is taken out because the elastic click / stop member 5 is engaged with the ratchet teeth on the outer periphery thereof. The display position at that time, that is, the track number is held. Therefore, the counter 4 of this cassette 1
Is a memory of the recording position (usage amount) of the magnetic sheet 2, and in the case where recording is performed using the cassette 1 in which the magnetic sheet 2 which has been recorded halfway is used for recording, By using the signal of the switch interlocked with the connecting shaft 8, it is possible to perform recording from the subsequent unrecorded track without causing the danger of double recording on the already recorded track. Therefore,
In that sense, it is preferable to take measures to keep the connecting shaft 8 inoperative during reproduction.

Next, referring to FIG. 9, a control circuit for the head moving mechanism and the seat rotation motor will be described.

In the same figure, the cassette sensing switch 51 and the mounting completion detecting switch 52 shown in FIG. 2 are connected together with the resistors R ₁ and R ₂ when forming a series circuit with the power source (+ Vcc) as shown. Reference numeral 68 is a connection shaft-counter engagement detection switch for detecting the engagement of the connection shaft 8 with the counter 4 on the side of the cassette 1. Although not shown in detail,
When the connecting shaft 8 is disengaged from the counter 4,
Is by connexion closed the protruding into its lower, with its engaging a normally open switch disposed so as to by connexion open to self-sliding property, as shown, in series with resistor R ₃ to the resistor R ₁ It is connected. A switching switch 69 is connected to the connection point a between the switch 52 and the resistor R ₂ and is connected to the terminal RC side in the recording mode and to the terminal PB side in the reproducing mode. 70
Responds to a high level signal applied through the terminal RC of the switch 69 to generate a head shift pulse having a constant period, and responds to a low potential at the connection point b between the switch 68 and the resistor R _3. The pulse generator circuit 71 is designed to stop the generation of the pulse, and 71 is adapted to receive the output pulse of the pulse generator circuit 70, the signal at the terminal RC of the switch 69, and the potential at the connection point b. An AND circuit, 72 is an inverter for inverting the potential of the connection point b, 73 is a recording enable by the output of the inverter 72 being high, and a recording command is given in this state so that a predetermined one of the recording input signals is given. Part (eg: 1 field or 1 frame of video signal in the case of a still video recorder)
Is a recording circuit configured to record on the sheet 2 through the head 5, and is configured to output a recording end signal d when the recording of the signal of the predetermined portion is completed. 74
Is an AND circuit that receives the signal at the terminal RC of the switch 69 and the recording end signal d from the recording circuit 73. 75 is a one-shot circuit (mono-multi-vibrator) that outputs a single pulse in response to a high level signal applied through the terminal PB of the switch 69, and 76 is also enabled by the high terminal PB of the switch 69. In addition, in this state, a reproduction track switching circuit which outputs a head shift pulse for switching the reproduction track by giving a reproduction track switching command in this state, 77 is the output of the AND circuits 71 and 74 and the one circuit An OR circuit for receiving the output of the short circuit 75 and the output of the reproduction reproduction switching circuit 76, a plunger drive circuit 78 for driving the plunger 64 of FIG. 8 in response to the head shift pulse applied through the OR circuit 77. Is.

79 is a reproducing circuit for reproducing the recording signal of the sheet 2 through the head 5, and 80 is a recording circuit for the head 5 in the recording mode (RC).
A switching switch adapted to connect the head 5 to the output of 73 or in the reproducing mode (PB) to the input of the reproducing circuit 79, which is arranged in interlocking relation with the switching switch 69.

Reference numeral 81 is a motor drive circuit which operates the seat rotation motor 82 for rotating the spindle 6 in response to the high potential at the connection point a. Incidentally, when recording / reproducing still video, according to the NTSC system, the motor drive circuit 81 is configured to rotate the motor 82 at a constant speed of 3,600 rpm to 1,800 rpm. As a result, it is possible to record / reproduce one field or one frame of video signal for one rotation of the sheet 2.

The switch 83 is designed to be opened in the recording mode (RC) and closed in the playback mode (PB) in conjunction with the switching switches 69 and 80, and to be connected to the power source (+ Vcc) together with the resistors R ₄ and R _5. ), A switching switch 84 connected in series with the potential of the connection point a and a connection point c of the switch 83 and the resistor R _5.
And 85 is a switching circuit adapted to energize the plunger 86 only when the output of the AND circuit 84 is high. Here, the plunger 86 is for controlling engagement / disengagement with respect to the connecting shaft 8a and the counter 4, and although a detailed mechanism is not shown, the connecting shaft 8 is held at a lower retracted position by being energized. The key portion 8a and the key groove 4b of the counter 4 are always held in the disengaged state regardless of whether the phases of the key portion 8a and the key groove 4b of the counter 4 are the same or not. Therefore, the connecting shaft 8 engages with the counter 4 only when the key portion 8a and the key groove 4b of the counter 4 are in phase with each other when the plunger 86 is not energized. Incidentally, the structure of the engagement control mechanism for the connecting shaft 8 and the counter 4 utilizing such a plunger 86 is, for example, the structure shown in the embodiment of Japanese Patent Application No. 58-132540 of the applicant of the present application. Is applicable as an example. The same applies to the engagement detection switch 68.

Now, in the above configuration, first, the operation in the recording mode will be described. In the recording mode, the switching switches 69, 80 and 83 are all connected to the terminal RC side. As a result, the output of the AND circuit 84 is always kept low, so that the switching circuit 85 does not energize the plunger 86. Therefore, the connecting shaft 8 can be engaged with the key groove 4b of the counter 4 when the phase of the key portion 8a thereof coincides with that of the key groove 8b. Next, the cassette 1 is loaded and the center core 3 of the seat 2 is loaded as described with reference to FIGS.
When the mounting on the spindle 6 is completed, the switches 51 and 52 are both turned on at this point, so that the potential at the connection point a becomes high, which causes the motor drive circuit 81 to drive the motor.
The drive of 82 is started, and accordingly, the rotation of the sheet 2 is started. On the other hand, when the potential at the connection point a becomes high, the pulse generation circuit 70 starts to generate the head shift pulse. In this state, the head 5 is on the sheet 2 in relation to the eject operation as described above. Is reset to a predetermined position shifted by one track / pitch from the first track to the outer peripheral side. Therefore, since the phase of the key portion 8a of the connecting shaft 8 does not match the key groove 4b of the counter 4. The switch 68 is in the disengaged state and is projected downward, and accordingly, the switch 68 is in the closed state. Accordingly, the AND circuit 71 allows the output pulse of the pulse generating circuit 70 to pass because the potential of the connection point b is high, and 24 is supplied to the plunger drive circuit 78 through the OR circuit 77. Then, the plunger drive circuit 78 energizes the plunger 64 in response to the output pulse of the OR circuit 77 at this time, so that the movement of the head 5 and the rotation of the connecting shaft 8 are performed. Then, when the phase of the key portion 8a coincides with and engages with the key groove 4b of the counter 4 during the rotation of the connecting shaft 8, the switch 68 is opened so that the potential at the connection point b becomes low. Then, the supply of the pulse to the AND circuit 71 is cut off, and the pulse generation circuit 70 stops the generation of the pulse. Therefore, in the head 5, the connecting shaft 8 has the counter 4
That is, the head 5 is set at the track No. position stored in the counter 4, as touched before, which means that the head 5 is set.

On the other hand, when the switch 68 is opened and the potential at the connection point b becomes low, the output of the inverter 72, which has been low until then, becomes high, so that the recording circuit 73 is set to the recording enable state. Therefore, in this state, when a recording command is given by the operation of a recording switch (not shown) or the like, a predetermined portion of the recording input signal is recorded at the previous track position on the sheet 2 through the switch 80 and the head 5. Like When the recording end signal d is output from the recording circuit 73 upon completion of the recording, the AND circuit 74 outputs a pulse in response to this, which is supplied to the plunger drive circuit 78 through the OR circuit 77. The plunger drive circuit 78 energizes the plunger 64 to move the head 5 to the next track position. Of course, along with this, the connecting shaft 8 rotates by a predetermined amount and the next track number is displayed by the counter 4. Hereinafter, such an operation is repeated every time a recording command is given by an operation such as a recording switch.

Next, the operation in the reproducing mode will be described. In the reproducing mode, the switching switches 69, 80 and 83 are all connected to the terminal PB side. In this state, when the loading of the cassette 1 and the pressing and mounting of the seat 2 on the spindle 6 are completed and the switches 51 and 52 are closed and the potential at the connection point a becomes high, the motor 82 is operated as described above. At the same time, the output of the AND circuit 84 goes high, so the switching circuit
85 energizes the plunger 86, and hence the connecting shaft 8 is thereafter held in the disengaged state in which it is pulled down with respect to the counter 4. Further, as a result, the switch 68 is held in the closed state, so that the output of the inverter 72 is held low, and accordingly, the recording circuit 73 is held in the unrecordable state.

On the other hand, when the switches 51 and 52 are closed and the potential at the connection point a becomes high, the terminal PB of the switch 69 becomes high, so that the one-shot circuit 75 outputs a single pulse, which is transmitted through the OR circuit 77. A drive circuit 78 is provided, and the plunger drive circuit 78 energizes the plunger 64 once in response to the single pulse at this time. As a result, the head 5 can be moved from the reset position described above to the first track position in the recording area on the sheet 2. Therefore, in this state, the recording signal of the first track is reproduced through the head 5, the switch 80 and the reproducing circuit 79. Incidentally, when the potential of the connection point a becomes high, the reproduction track switching circuit 76 is enabled, and accordingly,
In this state, when a track switching switch (not shown) is operated to give a reproduction track switching command, in response to this, the switching circuit 76 outputs a head sect pulse, which is supplied to the plunger circuit through the OR circuit 77. It is attached to the drive circuit 78. Then, the plunger drive circuit 78 energizes the plunger 64 in response to the pulse at this time, so that the head 5 is shifted to the desired track position.

As will be understood from the above, in the present embodiment, the magnetic head 5 is moved to a predetermined position for recording or reproduction immediately after the mounting of the magnetic sheet 2 on the spindle 6 is completed, Further, since the rotation of the spindle 6 is also started, recording or reproduction can be performed immediately when a recording or reproduction start signal is issued, which is very convenient.
In particular, considering the rise time of the motor 82 for rotating the spindle 6, etc., the motor 82 for rotating the seat immediately after the seat is mounted.
Starting is beneficial in terms of time savings.

In the circuit shown in FIG. 9, the cassette detection switch 51 is provided in series with the seat mounting completion detection switch 52 only when the cassette 1 is inserted in the holder 31. This is for enabling the movement of the switch 5 and the like, and the switch 51 may be omitted if such consideration is not necessary.

(Effect) As described in detail above, according to the present invention, a recording or reproducing apparatus that uses a rotating recording medium, and particularly, a recording that uses the recording medium with its coupling portion coupled to the rotation driving unit of the rotation driving means. Alternatively, as a reproducing device, the recording medium can be promptly recorded or reproduced by controlling the position of the recording or reproducing head immediately after the recording medium is securely attached to the rotation driving unit. Or, it is extremely useful in a reproducing apparatus.

[Brief description of drawings]

FIG. 1 is a perspective view showing a recording medium storage container used in an embodiment of the present invention and a rotary drive unit and a connecting unit on the apparatus side. FIG. 2 is a perspective view of an embodiment of the present invention, particularly cassette loading and An exploded perspective view of the seat mounting mechanism, FIGS. 3, 4, and 5 are sectional views showing various states of the mechanism shown in FIG. 2 taken along the line AA in FIG. 2, FIG. 6, and FIG. FIG. 7 is a plan view showing details of the cover / lock portion in the non-locked and locked states in the second illustrated mechanism, and FIG. 8 is a plan view of an embodiment of the present invention, particularly a head movement mechanism, The drawing is a circuit block diagram mainly showing a control circuit of a head moving mechanism and a seat rotation motor of one embodiment of the present invention. 1 ... Recording medium storage container, 2 ... Recording medium, 3 ... Recording medium coupling part, 5 ... Recording or reproducing head, 46 to 64 ...
Components of head moving means, 82 ... Rotation driving means, 6 ...
… Rotation drive section, 38 …… Pressing means, 51 …… Recording medium loading detecting means, 52 …… Pressing release detecting means, 70,71,75,77,78 ……
Components of head movement control means, 81 ... Rotation drive control means.

Claims (1)

[Claims] 1. A rotation driving means for coupling and rotating a coupling portion provided in a central portion of a recording medium; a recording or reproducing head for recording or reproducing a signal on the recording medium; Head moving means for moving a head with respect to the recording medium, and a predetermined load capable of being coupled to the rotation driving means from a detachable position capable of receiving the recording medium and capable of recording or reproducing a signal by the head. Recording medium transfer means for moving the recording medium to a position, and rotationally driving the coupling part of the recording medium in association with an operation of moving the recording medium from the loading / unloading position to the loading position by the recording medium transfer means. Pressing means for temporarily pressing the means to combine them, and releasing the pressing after completion of the combining operation, and the recording medium transfer means for attaching the recording medium to the recording medium. When the transfer from the position to the loading position is completed, locking means for locking the recording medium transfer means to hold the recording medium at the loading position, and the recording medium transfer means After the recording medium is moved to the loading position, and the pressing operation on the coupling portion is completed by the pressing means according to the movement of the recording medium transporting means, the pressing operation is released and the locking means is Detecting means for detecting the completion of locking of the recording medium transfer means, and controlling the head moving means based on the output of the detecting means to start the next recording or reproduction of the head on the recording medium. A recording or reproducing apparatus comprising: a control unit that moves to a position and operates the rotation driving unit to rotate the recording medium to a standby state.