JPH02123515A - Method for adjusting position for magnetic head - Google Patents

Abstract

PURPOSE:To execute highly accurate adjustment by fixing a dummy head carriage in parallel to the center shaft of a magnetic head for a side plane to a table and while the head carriage is observed by a microscope, setting the relative position in the X, Y and Z shaft directions of the table and the microscope. CONSTITUTION:A turn table 110 and a Y shaft table 111 are driven, a surface 102 and the X shaft of a dummy carriage 100 are coincident, after the moving quantity of a Y shaft table 110 is stored into a memory, an X shaft table 106 is driven, matched to the coordinates on a monitor TV 113 and the value of the X shaft is stored. Next, an interference microscope 114 is moved in a Z shaft direction, focused to an upper plane 101 and the value of the Z shaft is stored. Thus, after the value of respective gauges 115, 116 and 117 of the X shaft, Y shaft and Z shaft of a head adjusting device is set by a dummy carriage 100, the dummy carriage 100 is removed, a head carriage 42 is fixed to an X shaft table 106 while a guide shaft 44 and a lead screw 40 are stuck, and then, the head carriage 42 is in the state equivalent to that in the case where it is mounted in a main body 28 of an actual magnetic recording and reproducing device.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a method for adjusting a magnetic head, and in particular to a method for adjusting a magnetic head used in magnetic disks and/or playback devices such as electronic still cameras. be.

(b) Conventional technology A still image is recorded with an electronic camera on a rotating magnetic sheet of a floppy disk called a video floppy, and a still image is recorded on a monitor T.
An electronic still camera system has been developed that is capable of reproducing images in V or the like.

By the way, this type of magnetic sheet used in electronic still cameras and the like, unlike the -m magnetic sheet, still image information and the like are recorded at high density, and moreover, it rotates at high speed. Therefore, a magnetic head that contacts a magnetic sheet to perform recording and/or reproduction on the magnetic sheet is required to be accurately aligned with respect to the magnetic sheet.

From this point of view, magnetic heads for recording and reproducing used in electronic still cameras and the like require five adjustments: (1) protrusion amount, (2) tilt angle, (2) center shift, (2) azimuth angle, and (2) tilt. .

Figures 4 to 6 show these five adjustment procedures. In Figure 4, (10) is a rotating magnetic sheet, (12)
) is a magnetic head used for recording and/or reproducing on this magnetic sheet (1θ), (14) is provided at a position facing the magnetic head (12) with the magnetic sheet (10) in between,
This is a regulating plate that aligns the magnetic sheet (10) with the magnetic head (12). The magnetic head (12) is a magnetic sheet (10)
The protrusion amount (Ea) is required to be within a predetermined range, and precise adjustment is required in order to perform better recording and reproduction and prevent wear of the magnetic head and recording medium.

In addition, in order to obtain good reproduced images even when the same recording medium is loaded into different playback machines, the recording head and the playback head are separated, as in the case where the recorder and the playback machine are configured separately. When used as a magnetic head, the inclination angle θa as shown in FIG. 4, the amount of deviation Eb and azimuth angle θb of the magnetic head (12) with respect to the center of the magnetic sheet (10) shown in FIG. 5, and the angle θb as shown in FIG. Magnetic sheet (lO)
The tilt angle θC of the magnetic head (12) relative to each other is I
It needs to be within a predetermined range with Q properties.

FIG. 7 shows a plan view of a magnetic seat back used in a magnetic recording and/or reproducing device such as an electronic still camera, and FIG. 8 is a sectional view taken along the line V--V in FIG. 7.

As shown in FIG. 7, the magnetic seat back (16) has a substantially rectangular shape, and a magnetic sheet (18) on which information such as information on one still image is recorded is rotatably housed inside the magnetic seat back (16). A center core (20) as a reinforcing member is provided in the center of the magnetic sheet (18).
) is the circular opening (22) of the magnetic seat back (16).
) is exposed to the outside. Magnetic seat back (16)
A window (24) in which a magnetic head is located is opened, and this magnetic head window (24) is opened and closed by a slideable shutter (26). That is, the shutter (26)
Before the magnetic sheet back (16) is inserted into the inner packet of the player, the window (24) is closed and the magnetic sheet (
When the magnetic seat back (16) is inserted into the inner packet, the shutter (2) is
6) moves downward in FIG. 7 to open the head window (24), making it possible to record and reproduce information on the magnetic sheet (18).

FIG. 9 shows a magnetic recording and reproducing device, which is composed of a main body (28), an inner packet (30), and a top cover (32). A motor (34) for driving the magnetic seat is disposed in the device body (28), and the drive shaft (36) of this motor (34) is connected to the center core (20) of the magnetic seat back (16) shown in FIG. Center hole (21
) and rotate the magnetic sheet (18) at a predetermined number of rotations within the magnetic seat back (16). In Fig. 9, (38) is the magnetic head feeding motor, (40) is the lead screw connected to the output shaft of this motor (3, 9), and (42) is the lead screw (4G). A head carriage (46) that is screwed together and moved while being guided by a guide shaft (44) is a magnetic head provided on this head carriage (42).

Therefore, when the motor (38) is rotated at a predetermined number of rotations, the head carriage (46) is rotated by the lead screw (4).
0), the magnetic head (46) is moved in the axial direction of the guide shaft (44) at predetermined pitches, and thereby the magnetic head (46) is moved in the radial direction (direction of arrow A) of the magnetic sheet (18). ) above the still image information 1
Each track can be recorded or played back. There are brackets (48) at the ends of the device body (28).
The bracket (48) is provided with an inner packet (30) and a top lid (32) via a bottle (50).
) are centrally supported. As shown in the figure, the upper lid (32i) has a shape that can accommodate the inner packet (30).
3 (30) separates from the apparatus body (28) and the upper W (321) to open the magnetic sheet pack insertion slot (52) of the inner packet (30).

The left end surface (54) of the inner packet (30) in FIG.
) has a locking member (58) swingably supported via a shaft (56). Locking claw (60) of locking member (58)
is inserted into a recess (not shown) in the magnetic seat back (16) to attach the magnetic seat back (16) to the inner packet (30).
held within.

On the back surface of the top cover (32), plate springs (62) (62) bent into a crank shape are provided at predetermined intervals, and a regulating plate holder (64) is attached to the plate springs (62) (621). The regulating plate holder (64) has a length corresponding to approximately the entire width of the main body (28), and furthermore, the regulating plate holder (64) has a position that faces the magnetic head (46) when the top cover (32) is closed. A regulation plate (66) is provided at the regulation plate (66).
A groove (68) is formed in the direction of movement of the magnetic head (46).

Regarding the magnetic recording/reproducing device having the above structure,
As described in Publication No. 83215 (GLIB 5156), a magnetic head adjustment mechanism in a magnetic recording/reproducing apparatus having such a configuration is configured as shown in FIG. 10, for example.

That is, FIG. 10 shows details around the head carriage in FIG. 9, and (42) shows the lead screw (40).
) is inserted through the screw hole (70) and the guide shaft (4
4) is fitted into the guide recess (71), and (72) is the spring screw (7).
3) (73) By (73) the carriage (4)
2), a part of this plate (72) is a gear part (74), and a part of this plate (72) is a gear part (74).
) is engaged with a gear screw (75). (76) is an L-shaped metal fitting whose one end side is fixed to the plate (72) with a screw (77), and the other end of this metal fitting (76) is a head member having a head chip with a screw (79). (78) is attached. And the spring screw (7
3) (73) The amount of protrusion, tilt, and centering of the head can be adjusted using (73), the azimuth angle can be adjusted using the gear screw (75), and the inclination of the head can be adjusted using the screw (79). . Incidentally, the center deviation can also be adjusted using a screw (77).

(c) Problems to be Solved by the Invention By the way, the conventional method for adjusting a magnetic head is to attach the carriage (42) as shown in FIG. 10 to the main body (28) in the state shown in FIG. Use this to check the condition of the head (46)! ! ! While carefully tightening the screws (73) (75) (7
7) (79) was adjusted to set the attitude of the head (46) to a desired state.

However, with the method of adjusting the head by mounting a carriage with such a head attached inside the main body, the workability is extremely poor, and the processing accuracy of the main body cannot be expected, so it is impossible to adjust the head with accuracy. It becomes.

(d) Means for Solving the Problems The present invention provides a head that is guided and driven by a guide shaft and a lead screw driven by a motor, and is moved in the radial direction of a rotating magnetic sheet fitted on a spindle of a rotating seat base. A method for adjusting the position of a magnetic head provided on a carriage, the regulating portion having a mirrored upper plane and a side plane perpendicular to the upper plane;
a base portion having a bottom surface parallel to the upper plane and provided integrally with the defining portion, the upper plane matching the protrusion amount of the magnetic head and parallel to a plane perpendicular to the center axis of the magnetic head; A dummy head carriage whose side planes are parallel to the center axis of the magnetic head is used, this dummy head carriage is fixed to a table, an interference microscope is placed at a position facing the table, and the head In this magnetic head position adjustment method, the relative positions of the table and the microscope in the X, 'r', and Z axis directions are set while observing the carriage with the 5it mirror.

(E) Effect (F) Example The method for adjusting the position of a magnetic head according to the present invention will be described below, assuming that the magnetic recording/reproducing apparatus to be used is the same as that shown in FIGS. 4 to 10.

FIG. 1 shows a dummy carriage used in the present invention,
FIG. 2 shows a device for adjusting the head.

That is, the dummy carriage (1001) has a rectangular parallelepiped-shaped defining portion (1001) having a mirror-surfaced upper plane (+01) and a side plane (102) perpendicular to this upper plane <101>.
03) and a bottom surface (104) parallel to the upper plane (101).
1 and a base (105) provided integrally with the defining portion (103), and the main body (28) of the magnetic recording/reproducing device.
) as an actual head carriage, the upper plane +1011 corresponds to the amount of protrusion of the magnetic head (46) (
Ea) and the magnetic head (
46), and the side plane (102) is parallel to the center axis (C) of the magnetic head (46). This means that the dummy carriage (100) is placed on the X-axis table (106) of the head adjustment device (Fig. 3 (a)) and the actual head carriage (42
) placed on the table (106) (Fig. 3(
It can be seen from Figure 3, which compares the

The above dummy carriage (100) is connected to the table shown in FIG.
Support stand installed at 1061 (107) (107)
(It is placed on 10711071, and the stopper (108) (
1081 (108) (1θ8) and screw <109+
(109) (109) Fixed at (109). The table consists of a rotary table +110) and a Y-axis table (I) that can move in the Y-axis direction on this rotary table tllo).
ll) and the X-axis table (1) movable in the X-axis direction.
06+, and the dummy carriage (+001 is
It will be fixed on the axis table (1061).

First, the rotary table +110) and the Y-axis table (11
1) to move the surface (l) of the dummy carriage (+00).
θ2) and the X axis, and at this time Y[I
After storing the movement amount of the I child table 111) in memory,
Drives the X-axis table (1061) and monitor TV (113
), and memorize the value of the X-axis at that time.The interference class FAI1. Mirror (114) [This mirror (114) is connected to a monitor TV (113),
The image observed with the microscope (114) is displayed on the monitor TV (+1
31] in the Z-axis direction, and move the upper plane (1
01) to a position where the interference stripes are visible (in-focus position), and the Z-axis value at this time is stored in the memory.

In this way, with the dummy carriage (100), the head adjustment device's X @ gauge (+151, Y-axis gauge +11
61. After setting the value of the Z-axis gauge (117), remove the dummy carriage (100) and move the head carriage (42) to be adjusted to the guide shaft (44) as shown in Figure 3.
) and lead screw (40) are fixed to the X-axis table (1061), the head carriage (
42) is equivalent to the case where it is mounted inside the main body (28) of an actual magnetic recording/reproducing device.

Therefore, while watching the monitor TV (1131) in this state,
Each screw (731 (75)) of the head carriage (42)
By appropriately adjusting (77) and (79), the deviation from the reference value of the prescribed portion (1031) of the dummy carriage (100) is corrected, and the posture of the head is adjusted to a desired value.

(g) Effects of the Invention As described above, according to the head position adjustment method of the present invention, since the head adjustment can be performed outside the recording/reproducing apparatus, workability is extremely good and highly accurate 1Iil adjustment can be performed.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a dummy carriage used in the present invention, Fig. 2 is a view showing a head adjustment device used in the invention, Fig. 3 is an explanatory diagram thereof, and Fig. 4 is a protrusion of the magnetic head. Figure 5 is an explanatory diagram showing the center deviation and azimuth angle of the magnetic head, Figure 6 is an explanatory diagram showing tilt, Figure 7 is a plan view of the magnetic seat back, and Figure 8 is an explanatory diagram showing the amount and tilt angle. is V-VI! on Figure 7! FIG. 9 is a perspective view of the magnetic recording/reproducing device, and FIG. 10 is a perspective view of the head carriage. (10)... Rotating magnetic sheet, (36)... Rotating shaft (spindle), (38)... Feeding motor, (40
)...Lead screw, <42)...Head carriage, (44)...Guide shaft, (100)
...Dummy head carriage, (101)...Top plane, (102)...Side plane, (103)...Definition part, (104)...Bottom surface, (105)...Base part, <1
063...X-axis table, +114)...Interference microscope. Figure 3 Figure 4 Figure 5 Figure 6 e Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] (1) The position of the magnetic head provided on the head carriage is guided and driven by a lead screw driven by a guide shaft and a motor, and is moved in the radial direction of the rotating magnetic sheet fitted on the spindle of the rotating sheet base. A method for adjustment, comprising: a defining part having a mirrored upper plane, a side plane perpendicular to the upper plane, and a bottom face parallel to the upper plane, and provided integrally with the defining part. The upper plane matches the protrusion amount of the magnetic head and is parallel to a plane perpendicular to the center axis of the magnetic head, and the side plane is parallel to the center axis of the magnetic head. This dummy head carriage is fixed to a table, an interference microscope is placed at a position opposite to this table, and while observing the head carriage with the microscope, the X and Y directions between the table and the microscope are , a magnetic head position adjustment method that sets the relative position in the Z-axis direction.