JPH0718065Y2 - Standard disc recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a recording apparatus for recording a reference track on a reference disk.

SUMMARY OF THE INVENTION The present invention relates to a reference disk recording apparatus for recording reference tracks on opposite signal recording surfaces of both sides of a reference disk, and a slider moving mechanism for moving a head slider in a radial direction of the reference disk. The head reversing table supported by the head slider is mounted on the radial line of the reference disk 180
A rotating reversing mechanism, and a head mechanism in which a recording head and a recording / reproducing head are attached to the head reversing base so as to face each other, and the recording / reproducing head is positioned based on a reproduction signal of a reference track recorded by the recording head. By doing so, a pair of reference tracks with no displacement can be produced in a short time.

[Prior Art] In a disc player for recording / reproducing a removable recording disc of double-sided recording, if a pair of recording / reproducing heads facing each other are attached in a state of being displaced in the radial direction of the recording disc, a pair of recording / reproducing It takes time to track servo when switching heads. In particular, as the density of recording tracks increases due to high-density recording, the positioning of the pair of recording / reproducing heads in the radial direction of the recording disk is required with higher accuracy. For this reason, in this type of disc player, a pair of recording / reproducing heads are aligned using a reference disc in which a reference track on which a servo signal is recorded is recorded in advance. Then, FIG. 3 shows a conventional recording apparatus for recording a reference track on a reference disk.

In FIG. 3, the reference disk 1 is the disk table 50.
The disk table 50 is rotated by a motor 51. The head slider 52 is the reference disk 1
The head slider 52 is provided with a pair of recording heads 55 and 56 facing each other via a pair of head assemblies 53 and 54.
The reference disc 1 is rotationally driven to drive the upper and lower signal recording surfaces 1a, 1b.
A pair of reference tracks were recorded at the same position. Since the relative positions of the pair of recording heads 55 and 56 are easily displaced due to the assembly error of the head assemblies 53 and 54 and the recording heads 55 and 56, the relative alignment is recorded on the reference disk 1. Although it is corrected by observing the magnetization pattern of the reference track and optically measuring these positions, and finely adjusting the positions of the pair of recording heads 55 and 56 so as to match the positions of them. , This fine adjustment work required a lot of labor and skill. Therefore, in order to solve the above-mentioned drawbacks, the present applicant has proposed a reference disk recording apparatus shown in FIG.
No. 25 application documents).

In FIG. 4, two motors 61 and 62 are attached to a chassis 60, and a disk table 63 is fixed to the rotary shaft of one motor 61. The reference disk 1 is mounted on the disk table 63 and is rotationally driven by the motor 61. A feed screw 64 is fixed to the rotating shaft of the other motor 62, and a half nut 65 is engaged with the feed screw 64. The half nut 65 is fixed to a head slider 66, and the head slider 66 moves in the radial direction of the reference disk 1 (direction of arrow a in FIG. 4) by the rotation of the motor 62. The head slider 66 rotatably supports a reversing shaft 67 having a radius line b of the reference disk 1 as an axis, and a gear is provided at one end thereof.
68 is inserted. A gear 70 fixed to the rotating shaft of a motor 69 meshes with the gear 68. A head reversing base 71 is fixed to the other end of the reversing shaft 67, and the head reversing base 71 is rotated 180 ° by the drive of the motor 69, and is located at the solid line position in FIG. 4 and the alternate long and short dash line position in FIG. . The head reversing table
A head mounting arm 72 is rotatably supported by a shaft 73 on the 71, and a head assembly 74 is mounted on the head mounting arm 72.
A recording head 75 is attached via. Further, the iron core 77 of the plunger solenoid 76 is locked to the head mounting arm 72 and the spring force of the spring 78 acts. When the plunger solenoid 76 is turned on, it moves in the direction of arrow e in FIG. 4, the recording head 75 moves to the non-pressure contact position shown by the chain double-dashed line in FIG. 4, and when the plunger solenoid 76 is turned off, the spring force of the spring 78 changes. The recording head 75 moves to the pressure contact position shown by the solid line in FIG.

Then, the plunger solenoid 76 is turned on and the recording head 75
The reference disk 1 is rotationally driven in a state where it is in the non-press contact position. When this rotation reaches a predetermined rotation speed, the plunger solenoid 76 is turned off and the recording head 75 is brought into a pressure contact position to record a reference track on the lower signal recording surface 1b. Next, the head reversing table 71 is rotated 180 ° to the position shown by the alternate long and short dash line in FIG. 4, and the reference track is recorded on the upper signal recording surface 1a in the same manner as described above. In this way, since one recording head 75 is reversed and recording is performed on the upper and lower signal recording surfaces 1a and 1b, it is possible to exactly match by simply managing the mechanical accuracy for reversing the recording head 75 by 180 °. A pair of reference tracks can be recorded. Therefore, as in the conventional example, a pair of reference tracks are displaced due to an assembly error of the pair of head assemblies 53, 54 and the pair of recording heads 55, 56, and a lot of labor and skill are required to correct this. There is no need to perform the necessary fine adjustment work of the recording head 75.

[Problems to be Solved by the Invention] However, in the recording apparatus in which one recording head 75 is inverted to record a pair of reference tracks as described above, one reference track of one surface is used to produce the reference disk 1. Recording work → reversing work of the recording head 75 → recording work on the reference track on the other surface requires a long time to manufacture the reference disk 1 and is not suitable for mass production.

Therefore, it is an object of the present invention to provide a reference disc recording apparatus capable of quickly recording a pair of reference tracks without positional deviation and producing a reference disc in a short time.

[Means for Solving Problems] A reference disk recording apparatus according to the present invention for achieving the above object uses a disk-shaped reference disk having signal recording surfaces on both sides, and the reference disk is detachable. A disk rotating mechanism for rotating the mounted reference disk with respect to the chassis; a slider moving mechanism for providing a head slider on the chassis and moving the head slider in a radial direction of the reference disk; The head reversing table is supported by the head reversing table with the radial line of the reference disk as an axis.
A reversing mechanism for rotating the head reversing table, and
A recording head and a recording / reproducing head are provided so that recording can be performed on the signal recording surfaces on both sides at the 0 ° position, and the recording / reproducing head is positioned based on the reproduction signal of the reference track recorded by the recording head. It consists of

[Operation] Therefore, since the recording / reproducing head is positioned based on the reproduction signal of the reference track recorded by the recording head, the pair of reference tracks recorded by the recording / reproducing head and the recording head are recorded without misalignment. To be done. Then, the reference disk can be manufactured by simultaneously recording on both sides of the signal recording surfaces by the recording head and the recording / reproducing head.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, the reference disk 1 has a substantially disk shape, and a hub hole (not shown) is formed in the center thereof, and signal recording surfaces 1a and 1b are formed on both upper and lower surfaces.

In the disc rotating mechanism 2, a motor 4 is fixed to a chassis 3, and a disc table 5 is press-fitted on a rotating shaft of the motor 4. The rotation shaft of the motor 4 projects on the upper surface of the disk table 5, and the disk holder 6 is inserted into the projecting portion from above the reference disk 1. Then, the hub hole of the reference disk 1 is inserted into the rotary shaft on the upper surface of the disk table 5, and the disk holder 6 is inserted into the rotary shaft protruding from the reference disk 1, so that the reference disk 1 is mounted. The reference disc 1 mounted in can be removed. The mounted reference disk 1 is a motor 4
Is rotated together with the disk table 5.

The slider moving mechanism 7 includes a step motor 8 on the chassis 3.
Is fixed, and one end side of the feed screw 9 is fixed to the rotary shaft of the step motor 8. The other end of the feed screw 9 is rotatably supported by the chassis 3 via a bearing 10. A half nut 11 is engaged with the feed screw 9, and the head slider 12 is attached to the half nut 11 with a mounting screw.
It is fixed at 13. A guide hole (not shown) is formed in the head slider 12, and a guide rod (not shown) extending in the same direction as the feed screw 9 is inserted into the guide hole. When the step motor 8 is driven, the head slider 12 moves in the radial direction a of the reference disk 1 at the pitch of the feed screw 9.

In the reversing mechanism 14, a shaft hole 15 is formed in the head slider 12, and a reversing shaft 16 having a radius line (a line passing through the radius) b of the reference disk 1 as an axis is inserted into the shaft hole 15. . Bearings 17 are interposed between the reversing shaft 16 and the head slider 12 at two positions, and a bearing spacer 18 is interposed between the bearings 17 at the two positions, so that the reversing shaft 16 can be rotated by the head slider 12. Supported by. Both ends of the reversing shaft 16 project from the front and rear surfaces of the head slider 12. A driven side gear 19 is fixed to one end of the protruding inversion shaft 16, and the driven side gear 19 is a driving side gear.
Twenty engaged. The drive gear 20 is fixed to a rotary shaft 21a of a step motor 21, and the motor 21 is attached to a mounting base 22 of the head slider 12. The other end of the protruding reversing shaft 6 is press-fitted into the press-fitting hole 24 of the head reversing table 23, and the hand reversing table 23 is centered on the reversing shaft 16, that is, the radius line of the reference disk 1 (the line passing through the radius). It is rotatably supported as indicated by an arrow c in FIGS. 1 and 2 with b as an axis. Head inversion table 23 and the head slider
The head reversing table 23 has a positioning groove 25 at a 180 ° rotation position on the facing surface of the head reversing table 23.
A hard sphere 27 urged by a spring 26 is provided so as to project from the opposing surface of the.

When the step motor 21 is driven, this rotational force is transmitted to the drive-side gear 20 and the driven-side gear 19, the reversing shaft 16 rotates, and the head reversing table 23 rotates. This head inversion stand 23
At the 180 ° rotation position, the hard ball 27 enters the positioning groove 25,
0 ° position shown in FIG. 1 (position indicated by alternate long and short dash line in FIG. 2)
And the 180 ° position shown by the solid line in FIG.

The head mechanism 28 has a head mounting arm 29, and a head mounting portion 30 of the head mounting arm 29 and a head mounting portion 31 projecting from the head reversing base 23 and integrally provided are arranged at opposing positions. ing. A head assembly 33 having a recording head 32 fixed to the tip thereof and a head assembly 35 having a recording / reproducing head 34 fixed to the tip thereof are attached to the head attaching portions 30 and 31 by attaching screws 36, respectively. The recording head 32 and the recording / reproducing head 34 are arranged to face each other at a pressure contact position,
The elastic force of the head assemblies 33, 35 applies a predetermined head pressure to the upper and lower signal recording surfaces 1a, 1b to bring them into contact with each other. Further, the base end of the head mounting arm 20 is supported by the head reversing table 23 by a pivot shaft 37 and is rotated in a direction perpendicular to the radial line b of the reference disk 1 in the center. The head mounting arm 29 is formed with two insertion three holes 8 and 39,
The iron core 41 of the plunger solenoid 40 is inserted into the one insertion hole 38.
The piston shafts 43 of the oil dampers 42 are inserted into the other insertion holes 39, respectively. Both the plunger solenoid 40 and the oil damper 42 are fixed to the head reversing table 23. A coil spring 44 is interposed between the plunger solenoid 40 and the head mounting arm 29, and this spring force causes the head mounting arm to move.
29 is in contact with the reference surface 45 of the head reversing table 23, and the recording head 32 is located at the press contact position. The piston shaft 43 of the oil damper 42 is biased in the direction of the arrow d in FIG. 1 by a biasing means (not shown), but this biasing force is set to be weaker than the spring force. E-rings 46, 46 are attached to the tips of the iron core 41 and the piston shaft 43, and the E-rings 46, 46 are locked to the head attachment arm 29. When the plunger solenoid 40 is turned on,
The iron core 41 moves in the direction of the arrow e in FIG. 1 against the spring force of the coil spring 44, the head mounting arm 29 rotates in the direction of the arrow f in FIG. 1, and the recording head 32 moves in the alternate long and two short dashes line in FIG. It is located at the non-pressure contact position indicated by. The piston shaft 43 of the oil damper 42 is slowly moved in the direction of arrow d by the urging force of the urging means, and the E ring 46 thereof is again locked to the head mounting arm 29. When the plunger solenoid 40 is turned off, the head mounting arm 29 is rotated in the direction of arrow g in FIG. 1 by the spring force of the coil spring 44, and the recording head 32 is positioned at the pressure contact position shown by the solid line in FIG. When the head mounting arm 29 is moved to the press contact position, the piston shaft 43 of the oil damper 42 is locked and rotates together with the piston shaft 43, so that the recording head 32 slowly moves to the press contact position. That is, it is possible to prevent the recording head 32 from being impulsively pressed against the signal recording surface 1a and prevent damage to both.

Further, the pre-recording / reproducing head 34 is arranged in the radial direction a of the reference disk 1.
On the other hand, the recording head 32 is positioned based on the reproduced signal recorded, and the position is adjusted as follows. That is, as shown in FIG.
Then, the recording head 32 is set to the non-contact position shown by the chain double-dashed line in FIG. 2 and the reference disk 1 is rotationally driven. When the rotation of the reference disk 1 reaches a constant speed, the plunger solenoid 40 is turned off to bring the recording head 32 into the pressure contact position, and the reference track is recorded on the signal recording surface 1b below the reference disk 1. When the recording of the reference track is completed, the plunger solenoid 40 is turned on to bring the recording head 32 into the non-contact position again and the head reversing table 23 is rotated to the 0 ° position shown by the one-dot chain line in FIG. Then, the head assembly 35 of the recording / reproducing head 34 is temporarily fixed to the head mounting portion 31 with the mounting screw 36, and the reference disk 1 is rotationally driven. Then, the recording / reproducing head 34 runs on the lower signal recording surface 1b, and the recording / reproducing head 34 causes the recording head 32 to move.
The output signal of the reference track recorded by is reproduced. The recording / reproducing head 34 is moved in the radial direction a of the reference disk 1 to find the position where the output signal of the reference track becomes maximum, and the head assembly 35 is finally fixed by the mounting screw 36 at that position, and the operation is completed.

The operation of the recording device will be described below.

The head reversing table 23 is positioned at the 0 ° position shown in FIG. 1 by the driving force of the step motor 21, the plunger solenoid 40 is turned on to move the recording head 32 to the non-press contact position shown by the one-dot chain line in FIG. The reference disk 1 for recording the reference track is mounted on the disk table 5. Next, the step motor 8 is driven to move the head slider 12 in the direction of arrow a in FIG. 1 to position the recording head 32 and the recording / reproducing head 34 at a predetermined position where the reference track should be recorded. next,
The motor 4 is driven to rotate the reference disk 1 at, for example, 3600 rpm, and when the rotation rises, the plunger solenoid 40 is turned off. Then, the head mounting arm 29
While receiving the damper force of the oil damper 42, the coil spring 44
The recording head 32 is slowly moved to the press contact position by rotating in the direction of the arrow g in FIG. 1 by the spring force of, and the upper and lower signal recording surfaces 1a, 1
The recording head 32 and the recording / reproducing head 34 respectively run on b. Then, in this state, the recording head 32 and the recording / reproducing head 34 record reference tracks (tracks on which servo signals are recorded) on the upper and lower signal recording surfaces 1a and 1b, respectively. At the time of this recording, both heads 32 and 34 are driven by the step motor 8.
Is moved in the radial direction a of the reference disk 1 to record a reference track in a concentric circle shape or a spiral shape. When the recording of the reference track is completed, the plunger solenoid 40 is turned on again to rotate the recording head 32 to the non-pressure contact position to remove the reference disk 1 from the disk table 5, and the operation is completed. 1 is produced.

The reference disk 1 manufactured in this way is recorded by the recording / reproducing head 34 and the recording head 32 because the recording / reproducing head 34 is position-adjusted based on the reproduction signal of the reference track recorded by the recording head 32. The pair of upper and lower reference tracks are recorded without being displaced from each other.

Further, if the recording apparatus is composed of a recording / reproducing head together with both heads, it can be used as an inspection apparatus for reference tracks, and upper and lower reference tracks can be inspected at one time, so mass production check is possible.

Further, by applying the above technique to the head mechanism of the disc player, a pair of heads can be constructed without positional displacement.

[Advantages of the Invention] As described above, according to the present invention, the slider moving mechanism for moving the head slider in the radial direction of the reference disk and the head reversing table supported by the head slider are connected to the radial line of the reference disk. A reversing mechanism that rotates 180 ° about the axis, and a recording head and a recording / reproducing head are attached to the head reversing base so as to face each other, and the recording / reproducing head is positioned based on the reproduction signal of the reference track recorded by the recording head. By being configured with the mechanism, it is possible to produce a pair of reference tracks without positional deviation in a short time, and it is possible to produce a reference disk which is suitable for mass production and high density recording.

Further, in the recording apparatus which records the reference track on each side with one recording head as in the prior art, there is a disadvantage that the reference disk must be rotated in the reverse direction when the recording head is inverted by 180 °. However, the recording apparatus of the present application does not have such inconvenience in control.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a sectional view of the recording apparatus, and FIG. 2 is a partial sectional view of the recording apparatus showing the position adjusting means of the recording / reproducing head. FIG. 3 is a side view of the recording apparatus of the conventional example, and FIG. 4 is a sectional view of the recording apparatus of the preceding example. DESCRIPTION OF SYMBOLS 1 ... Reference disk, 1a, 1b ... Signal recording surface, 2 ... Disk rotation mechanism, 3 ... Chassis, 7 ... Slider moving mechanism, 12 ...
Head slider, 14 ... Inversion mechanism, 23 ... Head inversion table, 28
… Head mechanism, 32… Recording head, 34… Recording / playback head.

Claims (1)

[Scope of utility model registration request] 1. A disc rotating mechanism that uses a disc-shaped reference disc having signal recording surfaces on both sides, is configured such that the reference disc is detachable, and rotates the attached reference disc with respect to a chassis, and the chassis. A head slider, and a slider moving mechanism for moving the head slider in the radial direction of the reference disk; and a head inversion table supported on the head slider with the radial line of the reference disk as an axis. 180
A reversing mechanism for rotating the head reversing table, and
A recording head and a recording / reproducing head are provided so that recording can be performed on the signal recording surfaces on both sides at the 0 ° position, and the recording / reproducing head is positioned based on the reproduction signal of the reference track recorded by the recording head. A recording device for a reference disc, which is characterized in that