JPH02141959A - Disk drive mechanism for floppy disk device - Google Patents

Abstract

PURPOSE:To easily attain various adjustments by providing a means fixing a spindle motor to a frame and adjusting minutely the motor in forward/ backward/left/right directions of a plane orthogonal to the direction of the rotary shaft of the motor in the adjustment. CONSTITUTION:A spindle motor 10 and a frame 16 are semi-fixed by a screw through long holes 10b, 16a and the motor 10 is moved minutely in the direction X in the tracking adjustment. The direction X is a seek direction of a carriage mechanism 13. Thus, a stepping motor 14 is adjusted for the drive relatively to adjust the movement of the mechanism 13. On the other hand, in the azimuth adjustment or index position adjustment, the motor 10 is moved minutely along the long hole 16a of a frame 16 in the direction Y. Thus, the adjustment is implemented similarly to the tilt adjustment of the magnetic head mounted on the mechanism 13 or the position adjustment of the index sensor relatively. When a proper signal is obtained, the screw is tightened to fix the motor 10 to the frame 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention particularly relates to a disk rotation mechanism of a direct drive type floppy disk device.

(Prior Art) Conventionally, a disk drive for a floppy disk device is roughly divided into a disk rotation mechanism that rotationally drives a magnetic recording medium, a carriage mechanism equipped with a magnetic head that contacts the magnetic recording medium and seeks in the radial direction of the magnetic recording medium, and a stepping motor. It consists of a drive mechanism that drives the carriage mechanism by driving the carriage mechanism. The disk rotation mechanism includes a spindle motor fixed to a frame constituting the apparatus main body, and a spindle hub that holds the magnetic recording medium and rotates the magnetic recording medium by the rotational driving force of the spindle motor. The spindle motor is usually a direct drive type DC motor.

Incidentally, in the process of assembling a disk drive, various adjustment operations such as tracking adjustment, azimuth adjustment, and index position adjustment are required. What is tracking adjustment? CE
(Custoa+er Engineer) Measures the positioning accuracy of a magnetic head with respect to a predetermined track using a disk, and adjusts the positioning error of the magnetic head with respect to a reference position.

Azimuth adjustment is the inclination of the magnetic head with respect to the track (
angle). Further, index position adjustment means adjusting the rising timing of an index pulse that is outputted one pulse per rotation of the magnetic recording medium. Tracking adjustment is performed by adjusting the rotation of a stepping motor of a drive mechanism that drives the carriage. Azimuth adjustment is done by mounting the magnetic head: A adjustment.

Further, index position adjustment is usually performed by adjusting the position of an index sensor attached to a spindle motor.

(Problem WB to be Solved by the Invention) As described above, in the assembly process of a disk drive, each adjustment work of tracking adjustment, azimuth adjustment, and index position adjustment is required.

However, in each adjustment work, the stepper motor.

Position adjustment work is required for each individual component, such as the magnetic head and index sensor. For this reason, the adjustment work becomes complicated, which becomes a factor that reduces the efficiency of the entire assembly process.

An object of the present invention is to simplify the adjustment work of tracking adjustment, azimuth adjustment, and index position adjustment necessary for the assembly process of a disk drive, and to improve the efficiency of the entire assembly process. Our goal is to provide the following.

[Structure of the Invention (Means and Effects for Solving the Problems) The present invention provides a disk rotation mechanism equipped with a spindle motor that rotates a magnetic recording medium, in which the spindle motor is connected to a frame constituting the main body of the disk drive. A mechanism that is fixed and equipped with a position adjustment mechanism for making minute position adjustments of the spindle motor in the front, back, left and right directions of a plane perpendicular to the rotational axis direction of the spindle motor when adjusting the relative position of the magnetic recording medium. It is.

With this configuration, the relative position adjustment of the magnetic recording medium is performed in accordance with the position adjustment of the spindle motor, and each adjustment work of tracking adjustment, azimuth adjustment, and index position adjustment can be performed by adjusting the position of one component only. It can be made possible.

(Example) The present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view showing the configuration of a disk drive according to the same embodiment, and FIG. 2 is a position y of a spindle motor according to the same embodiment.
FIG. 2 is a schematic plan view for explaining the configuration of a yJ straightening groove machine.

As shown in FIG. 1, the disk drive (for example, 3.5-inch type) of the same embodiment includes a disk rotation mechanism having a spindle motor lO, a receiver mechanism 12 that holds a magnetic recording medium ti, and a carriage equipped with a magnetic head. A lead screw mechanism 15 for driving the carriage mechanism 13 using the mechanism 13 and the stepping motor 14 as drive sources.
It is equipped with

Here, the magnetic recording medium 11 is housed in a hard case made of plastic or the like, and is attached to and detached from the disk rotation mechanism by vertical movement of the receiver mechanism 12. As shown in FIG. 2, the spindle motor IO is fixed to the frame 16 of the disk drive by screws, and rotates the magnetic recording medium 11 using a direct drive method. The spindle motor lO is installed in several places (for example, in three places).
An elongated hole fob is formed in the rotary shaft 10a to guide it in, for example, the X direction on a plane perpendicular to the rotating shaft 10a. On the other hand, in the frame I6, an elongated hole 16a is formed at a position corresponding to the attachment point of the spindle motor 10, and the elongated hole 16a guides in the Y direction perpendicular to the elongated hole of the spindle motor IO. These elongated holes IDb and lea constitute a position adjustment mechanism for adjusting the position of the spindle motor 10 in the front, rear, left and right directions.

Next, the effects of this embodiment will be explained. As shown in FIG. 1, in the assembly process of a disk drive, various mechanisms such as a disk rotation mechanism are attached.

After this, the CE disk is inserted into the receiver mechanism 12, and various adjustment processes such as tracking adjustment, azimuth adjustment, and index position adjustment are performed based on the output signal from the magnetic head that performs a read operation on this CE disk. be done. In this embodiment, each adjustment step is performed by performing minute position adjustment of the spindle motor IO. That is, the long hole 10b,
Through 18a, spindle motor lO and frame 16
are set in a semi-fixed state using screws, and in the tracking adjustment, the spindle motor IO is slightly moved in the X direction. Here, the X direction is the theta direction of the carriage mechanism 13, as shown in FIG. As a result, the same adjustment work as that of relatively adjusting the rotation of the stepping motor 14 and adjusting the movement of the carriage mechanism 13 has been performed.

On the other hand, in azimuth adjustment or index position adjustment, the spindle motor lO is moved through the elongated hole le of the frame 1G in the Y direction.
Move it slightly along a. As a result, the adjustment work is relatively similar to the adjustment work of adjusting the inclination of the magnetic head mounted on the carriage mechanism 13 or adjusting the position of the index sensor.

Each adjustment operation is performed based on the adjustment signal read from the CE disk by the magnetic head so that an appropriate adjustment signal is obtained.

Then, the spindle motor IO is fixed to the frame 16 by tightening the screws through each of the elongated holes 10b and lea.

[Effects of the Invention] As described in detail above, according to the present invention, in the assembly process of a disk drive, each F such as tracking adjustment etc. [Able to perform tidying work.] As a result, in the past, the positions of individual components were adjusted in accordance with various adjustment operations, but in the present invention, various adjustment operations can be performed by adjusting the position of only the spindle motor. Therefore, various adjustment operations such as tracking adjustment can be simplified, and as a result, the efficiency of the entire disk drive assembly process can be improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the configuration of a disk drive according to an embodiment of the present invention, and FIG. 2 is a plan view illustrating the configuration of a position adjustment mechanism of the same embodiment. IO... Spindle motor, 11... Magnetic recording medium, 13... Carriage mechanism, 16... Frame, 1
0b. lea...Long hole. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Scope of Claims] A spindle motor that rotationally drives a spindle hub that holds a magnetic recording medium; and a spindle motor that is fixed to a frame that constitutes a main body of a disk drive, and that controls the relative position adjustment of the magnetic recording medium. a position adjustment mechanism for minutely adjusting the position of the spindle motor in the front, back, left and right directions of a plane orthogonal to the rotational axis direction of the spindle motor; .