JPH04372781A - Disk drive device - Google Patents

Abstract

PURPOSE:To integrate a guide shaft with a driving shaft, and miniaturize a device by transmitting the driving force of the driving shaft to a head carriage by a driving transmitting part, and moving the carriage along the driving shaft by a driving guiding part. CONSTITUTION:A disk 2 as a recording medium is rotated by a spindle 3, and the signal is read/written by a head 4. And also, the head 4 is moved and guided to the radial of the spindle 3 by the head carriage 5, and the head carriage 5 is driven by a driving shaft 6. At that time, when the driving shaft 6 is rotated by a stepping motor 7, the carriage 5 is moved along the driving shaft 6 to the radial of the spindle 3 by the rotational force of the driving shaft 6. At that time, the driving force of the driving part is transmitted to the carriage 5 by a driving transmitting part 21, and the carriage 5 is moved along the driving shaft 6 by a driving guiding part 22. Then, the transmitting part 21 and the guiding part 22 are integrally provided at the carriage part 5, and the driving shaft 6 is allowed to have a function as the guide shaft, so that this device can be miniaturized.

Description

[Detailed description of the invention]

0001

FIELD OF INDUSTRIAL APPLICATION The present invention moves a head carriage in the radial direction of a spindle by means of a guide shaft and a drive shaft, and records information on a disk rotated by the spindle.
In a disk drive device designed for playback,
By integrating the guide shaft and the drive shaft, the head carriage can run more smoothly and the disk drive device can be made more compact.

0002

2. Description of the Related Art As shown in FIG. 3, a disk drive device includes a spindle 102 for rotating a disk 101 as a recording medium, and a head 103 for reading/writing signals on the disk 101 rotated by the spindle 102. , a head carriage 104 that supports the head 103, a guide shaft 105 that guides movement of the head carriage 104 in the radial direction of the spindle 102, and a drive that moves the head carriage 104 along the guide shaft 105. Shaft (lead screw) 1
06, and by rotating the drive shaft 106 with a stepping motor 107, the guide shaft 10
5 is known in which the head carriage 104 is moved along the line 5.

Reference numeral 108 denotes a connecting plate provided on one side of the head carriage 104 in order to extract the rotational force of the drive shaft 106 as a moving force of the head carriage.

0004

However, in the conventional disk drive device described above, the guide shaft 105 and the drive shaft 106 are formed as separate bodies (separate parts), and the drive shaft 106 is The rotational force is transferred to the head carriage 104.
Since the device was configured to be taken out using a connecting plate 108 provided on one side of the device, there were problems as described below.

(1) There is a distance LA between the guide shaft 105 and the drive shaft 106 as shown in FIG. If a moment f is generated in the drive force transmission path and there is play between the guide shaft and the guide bearing, the head carriage cannot be smoothly fed and the feeding accuracy will be poor.

(2) Since the guide shaft and the drive shaft are separate bodies, assembly workability is poor, it is difficult to achieve positional accuracy between them, and it is also disadvantageous in downsizing the disk drive device.

The present invention solves the above conventional problems by integrating the guide shaft and the drive shaft.

[0008]

[Means for Solving the Problems] A spindle that rotates a disk as a recording medium, a head that reads/writes signals on the disk rotated by the spindle, and a head that is connected to the spindle along a guide axis. In a disk drive device comprising a head carriage that moves in the radial direction of the head carriage, and a drive shaft that drives the head carriage, the guide shaft is integrated with the drive shaft, and the driving force of the drive shaft is applied to the head carriage. and a drive guide section that moves the head carriage along the drive shaft.

[0009]

[Operation] The driving force of the drive shaft is transmitted to the head carriage by the drive transmission section, and the head carriage is moved along the drive shaft by the drive guide section.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to FIGS. 1 and 2.

In FIG. 1, reference numeral 1 indicates a disk drive device of the present invention, and the disk drive device 1 includes a spindle 3 that rotates a disk 2 as a recording medium, and a signal generator for the disk 2 rotated by the spindle 3. A head 4 that reads/writes signals, a head carriage 5 that moves and guides the head 4 in the radial direction of the spindle 3, and a drive shaft that drives the head carriage 5.
When the drive shaft 6 is rotated by a stepping motor 7, the head carriage 5 moves along the drive shaft 6 in the radial direction of the spindle 3 due to the rotational force of the drive shaft 6. It is supposed to be done.

The drive shaft 6 is arranged so that its axial direction is parallel to the radial direction of the spindle 3, and both ends thereof are rotatably mounted on the chassis by bearings 11 and 12.

Further, on one side of the head carriage 5,
A drive transmission section 21 that transmits the driving force of the drive shaft 6 to the head carriage 5 and a drive guide section 22 that moves the head carriage 5 along the drive shaft 6 are provided.

As shown in FIG. 2, the drive transmitting portion 21 includes a connecting plate 23, a groove engaging portion 24 provided on the connecting plate 23, and meshing with the lead groove 6a of the drive shaft 6. It consists of

When the drive shaft 6 is rotated, the rotational force of the drive shaft 6 is converted into a linear force by the groove engagement portion 24 and transmitted to the head carriage 5 via the connection plate 23. It has become.

The drive guide portions 22 are disposed on both sides of the head carriage in the direction of movement of the head carriage, sandwiching the drive transmission portion 21 therebetween.

A bearing hole 25 is provided in each of the drive guide portions 22, and a cylindrical sliding bearing 26 is attached to the inner peripheral surface of the bearing hole 25.

The drive shaft 6 is disposed within the slide bearing 26.
By inserting the head carriage 5, the head carriage 5 can freely slide along the drive shaft 6.

The other side of the head carriage 5 is adapted to slide along a sub-guide portion 31.

Since the disk drive device of the embodiment has the configuration described above, when the stepping motor 7 rotates the drive shaft 6, the rotation of the drive shaft 6 is caused by the groove engagement portion of the drive transmission portion 21. 24 into a linear motion, which is transmitted to the head carriage 5 via the connecting plate 23 to drive the head carriage 5.

The head carriage 5 to which the drive force is transmitted by the drive transmission section 21 is moved in the radial direction of the spindle 3 along the drive shaft 6 by the drive guide section 22.

[0022]

[Effects of the Invention] The disk drive device of the present invention includes a drive transmission section that transmits the driving force of the drive shaft to the head carriage;
By providing the head carriage with a drive guide section for moving the head carriage along the drive shaft, the drive shaft is given a function as a guide shaft, resulting in the following effects.

(1) Since the drive shaft has a function as a guide shaft, the number of parts can be reduced accordingly, and the structure of the disk drive device can be simplified and downsized.

(2) Since the drive transmission section and the drive guide section are arranged on the axis of the drive shaft, it is possible to prevent unnecessary moments such as LA×f from occurring in the drive force transmission path as in the conventional case. Therefore, it becomes possible to accurately move the head carriage or the head with light force.

[Brief explanation of drawings]

FIG. 1 is a plan view of a disk drive device of the present invention.

FIG. 2 is a partially cutaway plan view of main parts.

FIG. 3 is a plan view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Disk drive device, 2... Disk, 3... Spindle, 4... Head, 5... Head carriage, 6... Drive shaft, 21... Drive transmission part, 22... Drive guide part.

Claims (1)

[Claims] 1. A spindle for rotating a disk as a recording medium, a head for reading/writing signals on the disk rotated by the spindle, and a head carriage for moving the head in the radial direction of the spindle. , a drive shaft for driving the head carriage, a drive transmission section for transmitting the driving force of the drive shaft to the head carriage, and a drive guide section for moving the head carriage along the drive shaft. A disk drive device characterized by being provided with.