JPS6325529Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a magnetic head mounting mechanism for a device that forms a large number of concentric tracks in the radial direction of a disk-shaped recording medium, and the reproduction output characteristics are averaged on each track on the inner and outer peripheries. This is what we are trying to do.

When a single magnetic head is associated with a disk-shaped magnetic sheet that levitates and rotates relative to a stationary table and many tracks are formed in the radial direction of the sheet, the magnetic head is attached to a head mount provided on the access shaft. It is necessary to configure the fixed head base so that it can be adjusted so that the magnetic head is brought into contact with the magnetic sheet in an optimal positional relationship at each track on the inner and outer peripheries. This mutual contact between the magnetic sheet and the magnetic head (hereinafter referred to as head touch)
For the adjustment, the angles α and β and the height H shown in FIGS. 1 and 2 must be defined. Here, the angle α is the direction perpendicular to the medium contact surface of the magnetic head with respect to the advancing direction of the access axis (more precisely, the Y axis that is parallel to the stationary table surface and passes through the center of rotation of the magnetic sheet and the track width direction of the magnetic head). (Z
The angle β is the angle formed by the Z axis with respect to the X axis perpendicular to the Y axis of the stationary table surface, and the height H is the distance between the medium contact surface and the stationary table surface. be. In each figure, 1 is a stationary table having a head guide hole 1a, 2 is a magnetic head, 3 is a head base, and 4 is an abrasive sheet.

In the conventional mechanism, as shown in FIGS. 3 and 4, the head base 3 on which the magnetic head 2 is fixed is configured to be adjustable with respect to the head mount 6 attached to the access shaft 5, and the factors β and H are defined. Then, as shown in FIG. 2, the factor α is defined by polishing with a polishing sheet 4 corresponding to a magnetic sheet. That is, to adjust the height H, the movable head mount half 6B is moved vertically by the adjuster 8 against the spring 7 or in response to the head mount half 6A fixed to the access shaft 5. To adjust the angle β (first angle adjustment), insert the head base into the movable head mount half 6B by inserting the head into the elongated first and second notch holes 3a and 3b provided in the head base 3. first and second screws 9A for fixing;
9B as a guide, the head base 3 is oscillated by the adjuster 11 against or in response to the spring 10, and the adjustment of the angle α (second angle adjustment) is performed using the magnetic head as described above. This was done by wrapping the second medium contact surface 2a.

By the way, in a device in which a magnetic head is accessed in the radial direction of a magnetic sheet to form a multi-channel, the values of factors α, β, and H that exhibit the optimum head touch are different for each track on the inner and outer peripheries. -No. 102925 (Unexamined Japanese Patent Publication No. 53-
In the invention described in No. 27007, factor β,
Although a method has been proposed in which H is changed to an optimal value depending on the track position, the correspondence regarding factor α has not been resolved. According to experiments, as shown in FIG. 5, the angle is set to Δα1 (for example,
When tilted so that the angle becomes smaller by 30',
The reproduction output on the innermost track can be maximized. Therefore, in order to extract the optimum output through each track on the inner and outer peripheries, the angle α should be inclined by Δα2 (approximately half of Δα1) from the above reference value. In contrast, in the conventional example,
Wrapping is performed after installing the head base on the head mount half and adjusting the factors β and H. However, if the angle α0 in the initial state is close to the target value (for example, in the range of about 10′). case)
Although it is easy to obtain the optimum angle by this wrapping, it becomes difficult if the angle deviates greatly from the target value. Incidentally, the deviation is about ±1°. If the adjustment fails, H and β must be adjusted again, and then wrapping must be performed. As this process is repeated, the magnetic head may be damaged due to excessive wrapping.

The present invention was devised in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a structure in which the angle α can be adjusted reversibly, thereby allowing the optimum angle α to be obtained without going through the wrapping process. That is.

FIG. 6 shows an embodiment of the present invention,
This figure corresponds to FIG. 4 of the conventional mechanism, and there is no difference in the structure of the conventional mechanism except that an elastic body is provided between the head mount 6 and the head base 3. Therefore, other components are given the same drawing numbers to avoid duplication of explanation. The first and second elastic bodies 12A and 12B have spring properties, such as wave-shaped washers, and are mounted on the first and second screws 9A and 9B, respectively, so as to separate the head base 3 from the head mount 6. It is energizing. Therefore, by tightening the upper first screw 9A, the angle α can be reduced, and by tightening the lower second screw 9B, the angle α can be increased.

In addition, by adjusting the two screws to make the undulations of the elastic body the same, the head base (therefore, the magnetic head) can be adjusted to move in the Y direction (direction away from the head mount 6) at the same α. You can also.

In order to specify the angle α to a predetermined value using this mechanism, after specifying the factors β and H, for example, the reproduction output characteristic (characteristic A in Fig. 5) at the outermost track
A reference value is set from , and then the target angle is determined by tightening the upper screw 9A so that the angle becomes smaller by Δα2 or by loosening the lower screw. Reproduction output characteristics on the innermost track (fifth
It goes without saying that the target angle may be determined based on the graphical characteristic B).

In addition, in the magnetic head mounting mechanism of the present invention, the first
By adjusting the screw 9A and the second screw 9B serving as a guide, the angle α and the movement of the magnetic head 2 in the Y direction are adjusted.
B allows at least two angle adjustments and one movement adjustment of the magnetic head 2. Furthermore, by pressing the protrusion 13 formed on the head base 3 with an adjuster attached to the head mount, the second screw 9B is rotated around the first screw 9A, so that the angle β can be precisely and accurately adjusted. It can be done.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of factors α, β, and H, and FIGS. 3 and 4 are a perspective view and a side sectional view of the conventional mechanism. FIG. 5 is a reproduction output characteristic diagram.
FIG. 6 is a side sectional view of the mechanism of the present invention. 2...Magnetic head, 3...Head base, 3
a, 3b...first and second notch holes, 6...head mount, 9A, 9B...first and second screws, 11...
...adjuster, 13... protrusion.

Claims (1)

[Scope of utility model registration request] A head base having a magnetic head attached to an end thereof is provided with a protruding piece, and a first notch hole and a second elongated notch hole are provided on a diagonal line of the head base that intersects with a straight line connecting the protruding piece and the mounting position of the magnetic head. the head base is attached to the head mount by first and second screws inserted through the first and second notch holes, and the protrusion is moved against a spring by an adjuster attached to the head mount. Press,
In the magnetic head mounting mechanism for adjusting the first angle of the magnetic head by moving the head base around the first screw using the second screw as a guide, the head base is spaced apart from the head mount. First and second biasing elastic bodies are inserted into the first and second screws, and the first and second screws adjust the second angle of the magnetic head and move it away from the head mount. Magnetic head mounting mechanism for adjusting movement.