JP2866532B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates relates to a disc equipment, particularly relates to a disk device having a member for fixing the lead wire disposed between the driving portion and the driven portion.

2. Description of the Related Art In a disk device such as a hard disk device, for example, a head arm (drive portion) that is driven to rotate by a voice coil motor is provided so that a seek operation can be performed at any position on a magnetic disk.

[0003] As described above, the drive unit is provided in the disk device, and the drive unit is also provided with electronic components. Therefore, the electronic components are connected to an external circuit provided in the fixed unit. For this reason, lead wires are used.

[0004] Since the above-mentioned lead wire connects the drive section and the fixed section (non-drive section), it is displaced as the drive section is driven.

[0005] Therefore, there is a demand for a lead wire fixing structure that does not cause disconnection or the like even if the lead wire is displaced with the driving of the driving unit.

[0006]

2. Description of the Related Art Generally, a magnetic disk drive has a head arm rotatably held by a magnetic disk drive main body with respect to a disk (hereinafter simply referred to as a "disk") of a recording medium rotated at a high speed by a spindle motor. A magnetic head fixed to the tip is rotated in the radial direction of the disk by a voice coil motor (hereinafter, simply referred to as "VCM") to access an arbitrary data area of the disk, thereby recording and reproducing data on the disk. Is what you do.

Therefore, it is necessary to connect the signal line of the magnetic head fixed to the tip of the head arm serving as the drive unit to a circuit board or a connector provided on the magnetic disk drive body serving as the non-drive unit.

A lead wire is generally used as the signal line, one end of which is fixed to the head arm side, and the other end of which is fixed to the magnetic disk device body. Further, the lead wire is configured to be drawn out in a curved shape between the above-mentioned fixed portions so that the lead wire can behave following the turning operation of the head arm.

FIG. 4 shows a conventional lead wire 100.
3 shows a fixing structure. In FIG. 1, reference numeral 102 denotes a voice coil motor (hereinafter referred to as VCM) provided in the magnetic disk drive main body.
0 is fixed to the VCM 102. Reference numeral 103 denotes a fixing sheet metal for fixing the lead wire 100 to the VCM 102. Conventionally, this fixed sheet metal 103
Is fixed to the VCM 102 with the screw 104, so that the lead wire 100 is fixed to the VCM 102.

[0010]

As described above, the lead wire 100 is disposed between the head arm serving as the driving unit and the VCM 102 serving as the non-driving unit. It performs an alternating displacement. The displacement associated with the driving of the driving unit has a great effect on the life and reliability of the lead wire 100.

In particular, a portion to which the lead wire 100 is fixed (indicated by an arrow A in the figure) has a problem that a strong stress is easily applied as compared with other portions, and deterioration with time and disconnection are more likely to occur. .

In order to solve this problem, as shown in FIG.
The one provided with 3a has been proposed. However, in the case of this configuration, the lead wire 100 is displaced around the portion indicated by the arrow B in the figure, and stress is concentrated at this portion B, and deterioration with time and disconnection are likely to occur.

Further, a fixed sheet metal 1 provided with a reinforcing portion 103a
No. 03 has a problem that its shape becomes large and hinders downsizing of the magnetic disk drive.

The present invention has been made in view of the above, and an object thereof is to provide a disk equipment to obtain aim to improve the life and reliability of lead.

[0015]

Above problems SUMMARY OF THE INVENTION may lead disposed between the driving portion and the non-drive, in the disk device is fixed at a predetermined position of the non-driving portion by a fixing member, said drive And a lead disposed between the section and the predetermined position.
The portion of the wire that is displaced with the driving of the driving portion is an elastic material.
The problem can be solved by a disk device characterized in that the disk device is covered with a cylindrical body .

[0016]

[0017]

According to the above arrangement, the driving of the lead wire driving section is performed.
A part that is displaced with it, that is, a part where stress concentration is likely to occur
Since the cylinder made of elastic material is coated on the
The behavior of the lead wire in the above site due to movement is suppressed,
The life and reliability of the lead wire can be improved.

[0018]

[0019]

Next, an embodiment of the present invention will be described with reference to the drawings. Figure 2 is an internal plan view of an embodiment der Ru magnetic disk apparatus of the present invention.

In FIG. 1, a magnetic disk (hereinafter simply referred to as a "disk") 1 as a recording medium is fixed on a spindle motor 11 which rotates at a high speed. A magnetic head 2 for recording / reproducing data on / from a disk 1 has a head arm 3
It is fixed to the tip of. Further, the base end side of the head arm 3 VCM (voice coil motor) coil is fixed. The head arm 3 is a magnetic disk drive main body 1
It is rotatably held by a rotating shaft 5 fixed to zero.

Voice coil motor (hereinafter simply referred to as "VCM")
The upper yoke 6a having the VCM magnet 7 fixed to the back surface thereof, the lower yoke 6b disposed below the upper yoke 6a, and the magnetic circuit gap between the VCM magnet 7 and the lower yoke. And a VCM coil (not shown) disposed therebetween with a predetermined magnetic gap therebetween. The upper yoke 6a and the lower yoke 6b are both fixed to the magnetic disk drive main body 10.

A lead wire 12, which is a feature of the present invention, is provided between the head arm 3 driven by the VCM and the upper yoke 6a fixed to the magnetic disk drive main body 10.

The head arm side end of the lead wire 12, for example using an adhesive means or the like is fixed to the head arm 3, the above-mentioned magnetic head 2 and VCM coil is this <br/> leads 12 It is connected to the. In addition, lead wire 12
Is fixed to the side of the lower yoke 6b by a lead wire fixing structure which is an essential part of the present invention , and its end is connected to a connector 13 provided in the magnetic disk drive main body 10. ing. Thus, the magnetic head 2 and VCM coil is configured to be drawn out of the magnetic disk apparatus main body 10 via a lead wire 12.

Next, the operation of the magnetic disk drive having the above configuration will be described.

First, when the power of the magnetic disk drive is turned off, the magnetic head 2 fixed to the tip of the head arm 3 is mounted on a predetermined position of the disk 1 where no data is recorded. In this state, the spindle motor 11 is started, the disk 1 is rotated at a high speed, and an air flow is generated on the disk 1. The air flow causes the magnetic head 2 to float by a very small amount from the disk 1.

Subsequently, a current is supplied to the VCM coil. As a result, the VCM coil has a magnetic flux density formed in the above-mentioned gap according to Fleming's left-hand rule and VCM.
A driving force proportional to the value of the current flowing through the coil acts. With this driving force, the head arm 3 is driven to rotate about the rotation shaft 5.

The driving operation of the VCM is controlled by a host computer (not shown). Then, the VCM is driven by a command from the host computer, and moves the magnetic head 2 to a predetermined track position on the disk 1 on which required data is recorded. In this state,
The magnetic head 2 performs recording and reproduction processing of predetermined data on the disk 1.

As described above, when performing the magnetic recording / reproducing process, it is necessary to move the magnetic head 2 to a predetermined track position on the disk 1. Therefore, the head arm 2 is rotated by the VCM. Accordingly, the lead wire 12 disposed between the head arm 3 serving as a driving unit and the lower yoke 6b serving as a non-driving unit also performs an alternating behavior as the head arm 2 rotates.

Here, the vicinity of the arrangement position of the lead wire 12 is shown in an enlarged manner in FIG. As shown in the drawing, the lead wire fixing structure of the embodiment is characterized in that the buffer member 14 is provided at the position where the lead wire 12 is fixed and at the vicinity thereof. The buffer member 14 is made of, for example, an elastic member such as rubber, and is selected as a material capable of suppressing the displacement of the lead wire 12. However, the cushioning member 14 does not completely restrict the displacement of the lead wire 12.

Further, the arrangement range of the cushioning member 14 is arranged so that stress is easily concentrated when the lead wire 12 is displaced with the rotation of the head arm 3 described above. The arrangement range of the cushioning material 14 varies depending on the rotation angle of the head arm 3, the length of the lead wire 12, the rigidity of the lead wire 12, and the like, and is selected for each magnetic disk device to be applied. It is.

Further, as a specific method of attaching the buffer member 14 to the lead wire 12, a tubular buffer member 14
Is inserted into the lead wire 12, or a method of winding a film-shaped buffer member 14 around the lead wire 12 is conceivable.

The lead wire 12 provided with the buffer member 14 as described above is fixed to the lower yoke 6b by fastening the fixing plate 15 to the lower yoke 6b with the screw 16. When the lead wire 12 repeats the above behavior in the state of being fixed as described above, the most concentrated stress on the lead wire 12 is at the boundary between the edge of the fixed metal plate 15 and the lead wire 12.

However, in the fixing structure according to the present invention, since the buffering member 14 having the buffering function is provided at the above-mentioned boundary portion, the lead wire 1 accompanying the rotation of the head arm 3 is provided.
2 is suppressed by the buffer member 14, and the lead wire 12
Even when the head arm 3 is displaced by the driving of the head arm 3, the concentration of stress generated at the boundary portion is suppressed. This allows
Disconnection, damage, and the like of the lead wire that occur in the conventional fixing structure can be prevented, and the life and reliability of the lead wire 12 can be improved.

By arranging the cushioning member 14 on the lead wire 12 as described above, the fixing plate 15
It is no longer necessary to provide a reinforcing portion on the vehicle. Therefore, the fixed sheet metal 1
5 simply needs to have a shape sufficient to fix the lead wire 12 to the lower yoke 6b, and the shape of the fixing sheet metal 15 can be reduced. Therefore, the fixing position of the lead wire 12 can be reduced, and the size of the magnetic disk device can be reduced.

On the other hand, the portion where stress concentration occurs on the lead wire 12 with the rotation of the head arm 3 is not only at the above-mentioned boundary portion, but also at the curved portion of the lead wire 12 drawn out (indicated by an arrow C in the drawing). Also occurs. Particularly in the vicinity of the tip of this curved portion, an alternating displacement occurs, so that stress concentration is likely to occur. Accordingly, as shown in FIG. 3, the curved portion C of the lead wire 12 has the same configuration as the cushioning member 15 described above with reference to FIG.
The buffer member 17 may be provided. With this configuration, the life and reliability of the lead wire 12 can be improved.

In the above embodiment, a magnetic disk device has been described as an example of a disk device. However, the present invention can be widely applied to a fixed portion of a lead wire connecting a driving portion and a non-driving portion in the device. Is clear from the above description.

[0037]

As described above, according to the present invention, the lead wire
The part displaced with the driving of the drive unit, that is, the concentration of stress
A cylinder body made of an elastic material is coated on the parts that are likely to occur.
Of the lead wire in the above-mentioned area due to the drive of the drive unit
Movement is suppressed and lead life and reliability are improved.
Can be.

[0038]

[Brief description of the drawings]

FIG. 1 is a view for explaining a lead wire fixing structure according to an embodiment of the present invention.

FIG. 2 is a diagram showing a magnetic disk device to which a lead wire fixing structure according to an embodiment of the present invention is applied.

FIG. 3 is a view for explaining a modification of the lead wire fixing structure shown in FIG. 1;

FIG. 4 is a view for explaining a conventional lead wire fixing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disk 2 Magnetic head 3 Head arm 5 Rotating shaft 6a Upper yoke 6b Lower yoke 7 VCM magnet 10 Magnetic disk device main body 11 Spindle motor 12 Lead wire 14, 17 Buffer member 15 Fixed sheet metal

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 21/02 G11B 25/04

Claims (1)

(57) [Claims] 1. A disk drive in which a lead wire provided between a driving unit and a non-driving unit is fixed to a predetermined position of the non-driving unit by a fixing member, wherein a lead wire is provided between the driving unit and the predetermined position. Lead wire arranged in
The part displaced by the driving of the driving part is made of an elastic material.
A disk device covered with a cylindrical body .