JP2565295B2 - Spindle motor of disk device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor for a disk drive, and more particularly to a mechanical structure of the spindle motor.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional spindle motor of a disk device comprises a guide member 17 for guiding the center hole of the disk, a center of the center hole of the disk, and a spindle 19 which is a component of the spindle motor 18. A center adjusting member 20 having a function of making the axes concentric, a spring member 21 supporting the center adjusting member 20, a turntable 22 for setting a disc, and a guide member 17 and a turntable 22 fixed to one end thereof. Adjusting member 20
Is held slidably, and the other end has a permanent magnet 23 fixed via a bracket 24 to the spindle 19, a bearing 25 for rotatably supporting the spindle 19, and a holding member 26 for holding the bearing 25. An electromagnet 27 installed near the magnet 23 and fixed to the device. The center adjusting member 20 and the turntable 22 are respectively the spindle 1
Boss portions 28 and 29 are provided for stable engagement with 9.

Next, the operation will be described. The disc is
Guided by the guide member 17, it is set on the turntable 22 while resisting the spring member 21 and aligning the center of the center hole of the disk with the axis of the spindle 19 by the center adjusting member 20. At this time, between the boss portion 28 of the center adjusting member 20 and the turntable 22,
A gap is provided so that the center adjusting member 20 can operate.

On the other hand, as a conventional example aiming to reduce the thickness in relation to the spindle motor, one in which the installation configuration of the permanent magnet and the electromagnet is changed (for example, JP-A-62-14).
1675).

[0005]

The spindle motor of this conventional disk drive, for example, the spindle motor shown in FIG. 2 requires a boss portion on the center adjusting member and the turntable in the longitudinal direction of the spindle. Was an obstacle to making the product thinner.

Further, in another conventional example aiming at thinning in relation to a spindle motor, for example, Japanese Patent Laid-Open No. 62-141
In Japanese Patent Laid-Open No. 675, the spindle motor drive system is circumferentially opposed, and in order to generate a required drive torque, both the permanent magnet and the electromagnet must be thick, and it is impossible to make the spindle motor thin.

[0007]

A spindle motor of a disk device according to the present invention comprises a guide member, a center adjusting member, and a turntable which are constructed so as to overlap with each other in a fixed portion and a sliding portion of the spindle in a longitudinal direction of the spindle. Is equipped with.

[0008]

The present invention will be described below with reference to the drawings. 1A is a sectional side view of an embodiment of the present invention, FIG.
FIG. 3B is a perspective view of a main portion (turntable portion) of the embodiment of the present invention.

The spindle motor 1 of the present invention has a guide member 2 for guiding the center hole of the disc, a center adjusting member having a function of aligning the center of the center hole of the disc with the spindle 3 which is a component of the spindle motor 1. Four
A spring member 5 for supporting the center adjusting member 4, a turntable 6 for setting a disc, and a center adjusting member 4
Slidably holding the guide member 2 and the turntable at one end.
Cable 6 is fixed, and a permanent magnet 7 is attached to bracket 8 on the other end.
Via the spindle 3, a bearing 9 for supporting the spindle 3, a holding member 10 for holding the bearing 9, and an electromagnet 11 installed near the permanent magnet 7 and fixed to the apparatus.
And

The spindle motor 1 of the present invention is characterized by the shape of a turntable portion 12 composed of a guide member 2, a center adjusting member 4 and a turntable 6, and the turntable portion 12 includes a spindle 3 and Groove 13 of the guide member 2 formed in the engaging portion of the center adjusting member 4 and the protrusion rib 14 of the center adjusting member 4 formed in the engaging portion of the spindle 3
Are configured to fit together, and the center adjustment member 4
A groove 15 is also formed in the engaging portion of the turntable 6 with the spindle 3, and the groove 15 is configured to fit with the protruding rib 16 formed in the engaging portion of the turntable 6 with the spindle 3.

Next, the operation of the present invention will be described. The disc is guided by the guide member 2 and set on the turntable 6 while resisting the spring member 5 and aligning the center of the center hole of the disc with the axis of the spindle 3 by the center adjusting member 4. Figure 1 before inserting the disc
Grooves 13 of the projections rib 14 and the guide member 2 of the center adjusting member 4 as shown in (A) are each other fit tightly, but upon insertion of the disc outer surface is the center tone of the center hole of the disk
Slide the leveling member 4 along the spindle 3 along the protruding rib 14.
In order to push down the spring member 5 against the spring member 5, the protruding rib 16 of the turntable 6 and the groove 1 of the center adjusting member 4 are turned.
5 comes to fit closely.

[0012]

As described above, according to the present invention, in the turntable portion which constitutes the spindle motor of the disk device, the groove of the guide member and the protruding rib of the center adjusting member,
Make sure that the groove on the center adjustment member and the rib on the turntable
Each of them was fitted in the longitudinal direction of the spindle.
In, it can reduce the height of the spindle motor, thus have effects that thinner disk apparatus becomes possible.

[Brief description of drawings]

1A and 1B are diagrams showing an embodiment of the present invention, in which FIG. 1A is a sectional side view and FIG. 1B is a perspective view of a main part.

2A and 2B are views showing a structure of a conventional spindle motor, in which FIG. 2A is a sectional side view and FIG. 2B is a perspective view of a main part.

[Explanation of symbols]

1 Spindle Motor 2 Guide Member 3 Spindle 4 Center Adjusting Member 5 Spring Member 6 Turntable 7 Permanent Magnet 11 Electromagnet 13; 15 Groove 14; 16 Protrusion Rib

Claims (1)

(57) [Claims] 1. A guide member for guiding a center hole of a disk, a center adjusting member for aligning a center of the center hole of the disk with a shaft center of a spindle of a spindle motor, a spring member for supporting the center adjusting member, and a disk set. A turntable, a spindle having a guide member and a turntable fixed to one end, a center adjusting member slidably held, and a permanent magnet fixed to the other end, and a spindle installed near the permanent magnet and fixed to the device. In a spindle motor of a disk device for rotating a disk including an electromagnet, a groove is formed in the guide member, a groove and a protruding rib are formed in the center adjusting member, and a protruding rib is formed in the turntable. The groove of the guide member fits with the protruding rib of the center adjusting member, and the groove of the center adjusting member engages with the turntable. The spindle motor of a disk device having the features that are configured to mate with protrusions rib Bull.