JPS62200516A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify the structure of a magnetic head block, by supporting a placing table turnable freely on a carriage main body in the azimuth direction of a magnetic head, and pressing the placing table at an adjusting shaft energized in one direction with a spring and whose moving quantity is set as adjustable. CONSTITUTION:The titled device is a recording and reproducing device in which a magnetic head block 37 supporting a magnetic head 16 which brings into contact with a revolving magnetic sheet 12 and performs a recording and a reproduction, at a prescribed position, is loaded loadably and unloadably freely at the prescribed position on a placing plane 20 provided at the head carriage 21 of a device main body. A placing table 25 formed on the placing plane 20 is supported at the carriage main body turnably freely in the azimuth direction of the magnetic head 16 loaded at the placing table and also, the placing table 25 is energized with a spring 35 in one direction, and is pressed with an adjusting shaft 37 whose moving quantity is set as adjustable.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a recording/reproducing device in which a magnetic head block holding a magnetic head in advance is detachably attached to the main body of the device by VVC, and in particular, the present invention relates to Regarding the adjustment mechanism.

<Prior Art> In an image recording system using an already standardized electronic still camera, a magnetic sheet pack containing a magnetic sheet is used as a recording medium. FIG. 4 is a plan view of this magnetic sheet pack, and FIG. 5 is a sectional view taken along the line V-■ in FIG. A magnetic sheet 12 on which still image information and the like are recorded is rotatably housed. A center core 13 as a reinforcing member is provided in the center of the magnetic sheet 12, and this center core 13 is exposed to the outside through a circular opening 14 of the magnetic jacket 11, and the magnetic sheet pack 11 is connected to the rotating magnetic sheet. When loaded into the device, this center core 13 is connected to the spindle motor rotation shaft 15.
It is designed to be chucked by. Magnetic sheet/
A window portion 17 in which a magnetic head 16 is located is opened in the #trick 11, and this magnetic head window portion 17 is opened and closed by a slideable shutter 18. That is, the shutter 18 closes the window 17 to prevent dust from adhering to the magnetic sheet pack 12 before the magnetic sheet pack 11 is loaded into the recording/reproducing apparatus, and the shutter 18 closes the window 17 to prevent dust from adhering to the magnetic sheet pack 11. When loaded, the shutter 18 moves downward in FIG. 4 to open the head window 17, making it possible to record and reproduce information on the magnetic sheet 12. Then, this magnetic sheet 12 is heated at high speed (
While rotating at a speed of 3600 rpm), the magnetic head 16 is applied to the recording surface with a predetermined contact pressure (normally, the magnetic sheet 12
Magnetic recording and magnetic reproduction are performed by pushing the magnetic sheet 12 up by about 100 μm, for example.
Fifty-two magnetic tracks with a width of 0.0618 are formed with a pitch interval of 1 M.

Therefore, in order to be able to accurately trace the magnetic track formed as described above during recording, and during reproduction, the magnetic head 16 itself must be made of extremely fine material. is used and high precision is applied to its positioning. For these reasons, the magnetic head 16 used in electronic still cameras etc. has a protrusion IEa and an inclination angle θa with respect to the magnetic sheet 12 shown in FIG. 6, and a magnetic sheet 12 shown in FIG.
The deviation 1Eb from the center and the azimuth angle θb, ! 8
It is necessary that the tilt angle θC shown in the figure is within a predetermined tolerance range. In FIG. 6, reference numeral 19 denotes a regulating plate that is provided at a position facing the magnetic head 16 with the magnetic sheet 12 interposed therebetween, and allows the magnetic sheet 12 to align with the magnetic head 16.

By the way, if the highly sensitive magnetic head 16 is used in contact with the magnetic seam 12 with a certain contact pressure as described above, the magnetic head 16 will wear out. Then, the magnetic head 16 for the magnetic head 12
This results in a decrease in the contact pressure of the disc, making it impossible to maintain proper recording and reproducing operations. If such a problem occurs, the head 16 will have to be replaced. For example, in a commercial magnetic recording device that extracts a video signal from a photo image taken with a conventional photo camera and writes it to a magnetic head 12, the wear of the magnetic head 16 progresses due to natural enemy processing. As a result, the number of replacement operations for the magnetic head 16 inevitably increases. In order to install a new magnetic head 16 during this replacement, it is necessary to simultaneously satisfy the adjustment in the horizontal direction as described above, and special adjustment jigs and measuring instruments are required for such work. There is a problem in that the work requires skill.

Therefore, in order to simplify the replacement work of the magnetic head 16, the magnetic head 16 is accurately positioned using a jig and held in the magnetic head Glock, and the magnetic head Glock is inserted into the main body of the device. A device that is detachably attached to a predetermined position on a mounting surface provided on a RAD carriage has been considered. In this way, the magnetic head 16 can be positioned by accurately attaching the magnetic head Glock to the mounting surface, and since the magnetic head 010 can be positioned relatively easily, the work of replacing the magnetic head 16 is reduced. This makes it possible to simplify the process.

<Problems to be Solved by the Invention> Conventionally, when attaching the magnetic head 16 to a magnetic head Glock, the IT extraction of the magnetic head 16 is performed while observing interference fringes with a microscope from above the magnetic head 16. In this case, it is difficult to accurately adjust the azimuth direction of the magnetic head 16. Therefore, in order to adjust the azimuth direction of the magnetic head 16, after installing the magnetic head 16 in the main body of the device, a standard magnetic sheet is attached to the magnetic head 16.
Adjustments are made by rotating the magnetic head 16 so that the output signal is maximized while reproducing the data. Therefore, the magnetic head 16 attached to the conventional magnetic head block
As a result, the structure of the magnetic head Glock becomes complicated, which not only deteriorates the positioning degree but also increases the cost of the magnetic head Glock.

The present invention solves these conventional problems, and provides a recording/reproducing device equipped with an azimuth adjustment mechanism for a magnetic head Glock, which can reduce the cost of the magnetic head Glock and improve accuracy. The purpose is to

Means for Solving the Problems> To achieve this object, the recording/reproducing apparatus according to the present invention has a configuration in which a magnetic head that performs recording and reproduction by contacting a rotating magnetic sheet is placed at a predetermined position. The held magnetic head Glock is provided on the head carriage of the apparatus main body. It is characterized in that it is biased in one direction by a spring and can be suppressed by an adjustment shaft that allows adjustment of the mobile device.

<Operation> By changing the moving machine of the adjustment axis, the mounting table pressed by it rotates, and thereby the magnetic head Glock mounted on the mounting table rotates in the atomic direction, thereby adjusting the atomass of the magnetic head. Adjustments are made. Therefore, the magnetic head Glock itself does not require an azimuth adjustment mechanism, while sufficient space can be secured for the rotation mechanism of the mounting table, improving its mechanical precision.

Example of implementation Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 (4) is a plan view of the main parts of a magnetic recording device according to an embodiment of the present invention, and FIG.
As shown in the figure, there is a magnetic head Glock mounting surface 20 on the top surface.
The head carriage horn 21 having a magnetic sheet 12 is supported so as to be movable in the radial direction of the magnetic sheet 12 as a whole. The main body of the head carriage 21 includes a base 22 and wedge-shaped lower and upper movable bases 23 and 24. The base 22 is rotatably supported around the asomas rotation center -726.
The magnetic sheet 12 is supported by a rail 28 on a sliding table 27 fixed to the device main body (not shown) so as to be freely movable in the radial direction of the magnetic sheet 12, and is fed by a stepping motor 29 via a feed screw (not shown). It has become. Further, a lower movable base 23 having an inclined upper surface is movably supported on the base 22, and one end of the lower movable base 23 is fixed to the base 22 and attached to the nine bracket 30. It is pressed against the shaft 32 of the micrometer head 31 by a spring 33. Lower movable stand 23
An upper movable table 24 having an inclined surface that engages with this inclined surface is supported on the upper surface so as to be movable up and down, and is pressed against the upper surface of the lower movable table 23 by a spring 34. Therefore, micrometer head 3
By adjusting the protrusion 1 of the shaft 32 of 1, the lower part 0] moving base 23
moves, thereby causing the upper moving table 24 to move up and down via the 11Afp+ plane. Furthermore, 1i
! The mounting table 25 is a bracket 3 fixed to the upper moving table 24.
The micrometer bed 36 attached to the racket 34 is biased clockwise in FIG. It is pressed to 37. Therefore, by operating the micrometer head 36 and changing the movement of the adjustment shaft 37, the mounting table 25 can be adjusted to the assomatic rotation center pin 2.
Rotates around 6. Further, a lock plate 38 is fixed to the mounting table 25 along the upper surface of the upper moving table 24.
As shown in FIG. 2, which is a cross-sectional view taken along line B-■ in FIG. ing. A hole is bored in these lock plate 38 and pressing plate 39, and a lock screw 40 is screwed into the upper moving table 24 through the hole. The rotation angle position of the mounting table 25 can be locked by pressing the lock plate 38 against the upper moving table 24. Here, the upper moving table 24, the lock plate 38,
A gap is not formed between the pressing plates 390 to prevent the lock plate 38 from being twisted when the I/C lock screw 40 is tightened and affecting the rotation angle position of the mounting table 25.

The azimuth rotation center pin 26 protrudes onto the mounting surface 20, and a positioning pin 41 is protruded from the mounting surface 20 behind the azimuth rotation center pin 26. Also, i1
! A permanent magnet 42 is embedded in the mounting device 0, and support stands 43 are erected on both sides of the azimuth rotation center pin 26, and permanent magnets 44 are also embedded in the support stands 43. Furthermore, a flat reference surface 45 is formed on the upper surface of the mounting surface 20 and is machined with high precision.

On the other hand, as shown in mx cause (to), the head is now 2
A motor 46 is disposed in front of the motor 1, and a magnetic sheath 12 is attached to the rotating shaft 15 of the motor 46 so as to be rotationally driven.

On the other hand, Fig. 3 shows the magnetic head Glock, and Fig. 3) is a plan view, Fig. 3 is a side view, and Fig.
) is a front view, and FIG. 0 is a bottom view. As shown in FIG. 3, the magnetic head Glock 47 has a pressing portion 48 with a semicircular cross section that can fit into the azimuth rotation center pin 26 on the front surface thereof, and a pressing portion 48 on the rear surface thereof. A recess I449 into which the positioning pin 41 can be inserted is provided. The magnetic head Glock 47 is made of a non-magnetic material, and has shoulders formed at both ends on its front surface, and a permanent magnet 50 that attracts the permanent magnet 44 embedded in the support base 43 and the permanent magnet 50 is embedded therein. head block 4
A permanent magnet 51 that attracts the permanent magnet 42 on the mounting surface 20 to each other is embedded in the bottom surface of the magnet 7 . Thus, the magnetic head block 47 has its pressing portion 48 pressed against the mounting surface 20.
The positioning pin 41 is positioned by coming into contact with the azimuth rotation center pin 26, and rotation about the azimuth rotation center pin 26 is prevented by fitting the positioning pin 41 into the island 49. Further, the permanent grinding stone 50 embedded in the front surface of the shoulder of the magnetic head Glock 470 attracts the permanent magnet 44 and urges the magnetic head Glock 47 forward.
A permanent magnet 51 embedded in the bottom surface of the magnetic head lock 47 attracts the permanent magnet 42 to bring the magnetic head lock 47 into close contact with the reference surface 45 on the mounting surface 20.

Generally, the magnetic head 16 is mounted on the upper surface of the magnetic head block 47 so that its head gap is on the center axis of the pressing part 48 and on the center axis of the azimuth rotation center pin 26 when it is mounted on the pick mounting surface 20. It is fixed in place. That is, the auxiliary glock 52 is fixed to the upper surface of the magnetic head glock 47 with gel, while the support plate 53 that supports the magnetic head 16 is fixed to the mounting plate 54 with bolts, and the mounting plate 54 is fixed to the auxiliary block 52. The head is fixed using an adhesive while being positioned using a head mounting jig.

Therefore, according to such a configuration, the magnetic head 16
The magnetic head 16 is positioned at the new position by attaching the magnetic head lock 47, which is positioned and fixed, to the head block mounting surface 20 of the magnetic recording device. On the other hand, after the magnetic head Glock 47 is attached, the adjustment shaft 3
When the movement 1tt of 7 is changed, the mounting table 25 rotates around the azimuth rotation center pin 26, and thereby the sensing head 16 rotates around the head gap to perform azimuth adjustment. Then lock screw 4
By tightening 0, the mounting table 25 is locked.

Although this embodiment describes a recording device, it goes without saying that the present invention can also be applied to a reproduction-only device or a device that performs recording and reproduction.

<Effects of the Invention> As described above in detail with reference to one embodiment, the present invention provides a recording/reproducing apparatus in which a magnetic head block holding a magnetic head in advance is removably attached to the main body of the apparatus. Since it is not necessary to provide an azimuth adjustment mechanism in the magnetic head Glock, the structure of the magnetic head GLOCK is simplified, and costs can be reduced. Further, since sufficient space can be secured for the rotating mechanism of the mounting table, the mechanical precision thereof can be improved, and the precision of azimuth adjustment can be improved.

[Brief explanation of drawings]

The first gap is a plan view of the main part of a magnetic recording device according to an embodiment of the present invention, FIG. Fig. 3 shows a magnetic headblock according to an embodiment of the present invention, where the third gap is a plan view, Fig. 3 (h) is a side view, Fig. 3 (Ω) is a front view, and Fig. 3 (g) is a bottom view. 4 is a plan view of the magnetic sheet pick-up, FIG. 5 is a sectional view taken along the line V-■ in FIG. 4, and FIGS. 6 to 8 are explanatory views of positioning the magnetic head. 16 is a magnetic sheet, 16 is a magnetic head, 20 is a magnetic head Glock mounting surface, 21 is a head carriage, 25 is a mounting table, 26 is an azimuth rotation center bin, 35 is a spring, 37 is an adjustment shaft, 47 is a magnetic head Glock. be.

Claims (1)

[Claims] A recording device in which a magnetic head block, which holds a magnetic head in a predetermined position for recording and reproducing by contacting a rotating magnetic sheet, is detachably attached to a predetermined position on a mounting surface provided in a head carriage of the device main body. In the playback device, a mounting base on which the mounting surface is formed is supported by a carriage body so as to be rotatable in the azimuth direction of the magnetic head mounted thereon, and the mounting base is rotated in one direction by a spring. A recording/reproducing device characterized in that it is pressed by an adjustment shaft that is biased and whose movement amount can be adjusted.