JP3094598B2 - Measuring and adjusting device for rotating head device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the measurement of the amount of head protrusion of a rotary head device with respect to a rotary cylinder in a magnetic recording and reproducing apparatus, and the measurement and adjustment of the rotary head device for adjusting the coaxiality of the rotary cylinder with respect to a fixed cylinder. Related to the device.

[0002]

2. Description of the Related Art In recent years, with the remarkable spread of magnetic recording / reproducing devices, demands for higher performance and lower cost have been increasing.

Conventionally, in order to judge whether or not it is time to replace a rotary cylinder of a rotary head device, the amount of protrusion of a head disposed on the rotary cylinder with respect to the rotary cylinder is measured by using a rotary head device that measures the chassis of the magnetic recording / reproducing device. When the measurement is carried out in a state of being mounted on the head, the protrusion amount is measured by a measuring device having a pickup whose height and shape are determined exclusively for measuring the head protrusion amount.

When replacing the rotary cylinder of the rotary head device with the rotary head device mounted on the chassis of the magnetic recording / reproducing device, when adjusting the coaxiality of the rotary cylinder with respect to the fixed cylinder, the above-mentioned head protrusion amount is required. In addition to the measuring device, the coaxiality is adjusted by an adjusting device having a pickup whose height and shape are determined exclusively for adjusting the coaxiality.

[0005]

However, in the measurement and adjustment work required when replacing the rotary cylinder of the conventional rotary head device, a measuring device for measuring the amount of protrusion of the head with respect to the rotary cylinder, and a rotary cylinder. As an adjusting device for adjusting the coaxiality with respect to the fixed cylinder, there is a problem that a separate dedicated measuring and adjusting device must be used.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a measuring / adjusting device for a rotary head device, in which a plurality of measuring and adjusting operations can be performed by a single measuring / adjusting device. I do.

[0007]

In order to achieve the above object, a measuring and adjusting apparatus for a rotary head device according to the present invention can adjust the height of a measuring pickup from a chassis by a height adjusting mechanism provided on a supporting part. It was made. In addition, the contact measuring portion of the measuring pickup is formed in a wedge shape, and is configured to be rotatable and movable only in a direction perpendicular to the outer peripheral surface of the rotary head device according to the application. The measurement is performed with the convex portion of the rotating head device perpendicular to the rotating surface of the rotary head device. When adjusting the coaxiality of the rotating cylinder to the fixed cylinder, the adjustment is performed with the convex portion of the measuring pickup parallel to the rotating head device rotating surface. It has such a configuration.

[0008]

According to the present invention, in the above construction, the measurement of the amount of protrusion of the head from the rotating cylinder and the adjustment of the coaxiality of the rotating cylinder with respect to the fixed cylinder are performed while the rotating head device is mounted on the chassis of the magnetic recording / reproducing apparatus. It can be performed by a single measuring and adjusting device.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the measurement / adjustment device of the rotary head device includes a dial gauge 1, and a dial gauge pickup 2 is linked with a measurement pickup 3 having a wedge-shaped tip, and a chassis of a magnetic recording / reproducing device (shown in FIG. 1). The height of the measurement pickup 3 can be adjusted by a support component 4 provided with a height adjustment mechanism 5a, and the support component 4 is mounted together with the dial gauge 1, the measurement pickup 3 and the like by a rotatable support block 9. It is configured to be.

The measuring / adjusting device for the rotary head device according to the present embodiment having the above-described configuration is shown in FIGS.
The operation will be described with reference to FIG. First, when measuring the amount of protrusion of the head 8 attached to the rotary cylinder 6 with respect to the rotary cylinder 6, the height adjusting mechanism 5a in FIG. 4 is brought into contact with the lower limit 5b of the height adjusting mechanism, and the measurement in FIG. The measurement is performed with the convex portion of the contact measuring unit of the pickup 3 perpendicular to the rotating surface of the rotary head device.

Next, the fixed cylinder 7 of the rotary cylinder 6
In order to adjust the coaxiality with respect to the height, the height adjustment mechanism 5a in FIG. 4 abuts against the height adjustment mechanism upper limit 5c, and the convex portion of the contact measurement unit of the measurement pickup 3 in FIG. Adjust in parallel.

The supporting part shown in FIG.
The height adjustment mechanism 5a is mounted on a chassis (not shown) of the magnetic recording / reproducing apparatus for measurement. The height adjustment mechanism 5a is movable between fixed 5b and 5c.

[0013]

As described above, according to the present invention, the height of the measurement pickup from the chassis is adjusted by the support component having the height adjustment mechanism, and the projection of the contact measurement section of the wedge-shaped measurement pickup is adjusted. By rotating, measurement of the amount of protrusion of the head with respect to the rotating cylinder in a state where the rotating head device is mounted on the chassis of the magnetic recording and reproducing device by a single measuring and adjusting device, and adjustment of the coaxiality of the rotating cylinder with respect to the fixed cylinder, These multiple measurement and adjustment operations can be performed.

[Brief description of the drawings]

FIG. 1 is a front view of a measuring and adjusting device for a rotary head device according to an embodiment of the present invention.

FIG. 2 is a side view of a head protrusion amount measurement pickup of the rotary head device.

FIG. 3 is a side view of a measurement pickup for adjusting the coaxiality of a rotary cylinder of the rotary head device.

FIG. 4 is a side view of a supporting part of the measuring and adjusting device of the rotary head device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dial gauge 2 Dial gauge pickup 3 Measurement pickup 4 Supporting parts 5a Height adjustment mechanism 5b Lower limit of height adjustment mechanism 5c Upper limit of height adjustment mechanism 6 Rotating cylinder 7 Fixed cylinder 8 Head

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 5/53 104 G11B 5/455

Claims (1)

(57) [Claims] 1. A dial gauge, a measurement pickup interlocking with a dial gauge pickup, a wedge-shaped contact measurement section, and a convex section being rotated to move only in a direction perpendicular to the outer peripheral surface of the rotary head device. A supporting part having a mechanism and fixing the dial gauge and the measurement pickup to a chassis of a magnetic recording / reproducing apparatus is provided, and a convex portion of the measurement pickup is perpendicular to a rotation surface of a rotary head device,
When the height adjustment mechanism of the support component is set to the lower limit, the amount of protrusion of the head disposed on the rotary cylinder with respect to the rotary cylinder is measured, and the protrusion of the measurement pickup is made parallel to the rotary head device rotation surface, and A rotary head device measuring / adjusting device arranged to adjust the coaxiality of a rotary cylinder of a rotary head device with respect to a fixed cylinder when a height adjustment mechanism of a component is set to an upper limit.