JPH08255440A - Suspension and disc apparatus - Google Patents

Abstract

PURPOSE: To prevent the destruction of data by arranging a recessed part sunk across the thickness of a spacer on the side of a base end part of a suspension and a terminal on the bottom part thereof to expand the interval between the suspension side and a recording medium. CONSTITUTION: In this disc device, as a terminal 52 is provided on the bottom part of a recessed part 55, a wire connected to the terminal 52 and soldering formed on the terminal 52 are housed into the recessed part 55, so that the interval is made broader than ever between the suspension side and the recording medium. Thus, even when an impact works on the device to vibrate the side of the recording medium and the suspension side, the side of suspension 50 becomes less liable to contact the recording medium thereof preventing the destruction of data of the recording medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a head provided on the distal end side, a spacer mounting surface formed on the proximal end side, and terminals for wiring connected to the head on the proximal end side. The formed suspension, a recording medium that is rotationally driven, a head that reads / writes data from / to the recording medium, the head is provided via the suspension, and the head is used to track a track of the recording medium. The present invention relates to a disk device including a carriage that is driven in a transverse direction.

In recent years, there has been a rapid demand for higher capacity disk drives. As a method of satisfying this, a method of increasing the recording density per unit area by improving the head and the recording medium, a method of reducing the number of parts to be used in the apparatus by increasing the number of the recording heads and the number of recording media to be used, etc. There is.

[0003]

2. Description of the Related Art Next, a conventional example will be described with reference to the drawings.
8 is a partially cutaway plan view of a magnetic disk device as an example of the disk device, FIG. 9 is a sectional view taken along the line AA in FIG. 8, and FIG.
0 is a perspective view of the spring arm in FIG.

First, the overall structure of the magnetic disk device will be described with reference to FIGS. In these figures, 1 is an enclosure. The enclosure 1 is composed of a base portion 2 whose top and corners are open, and a lid 3 which covers the top. A spindle hub 4 which is rotationally driven (for example, 3600 rpm) by an inner hub motor (not shown) is provided on the base portion 2. A plurality of magnetic disks 6 (six in the conventional example) are attached to the outer cylindrical surface of the spindle hub 4 via a spacer 5.

Further, a shaft 7 is erected on the base portion 2. A carriage 9 is rotatably provided on the shaft 7 via a bearing 8. A head arm 10 is formed at one rotation end of the carriage 9 so as to extend in the recording surface direction of each magnetic disk 6 and rotate in a direction traversing the track of the magnetic disk 6.

A magnetic circuit 11 is provided at a corner of the enclosure 1. The magnetic circuit 11 covers the corners of the base 2 and the lid 3 and forms an outer shell of the magnetic disk device, an inner yoke 14 connected to the outer yoke 13, and the outer yokes 13. Inner yoke 14
A magnetic gap 16 is formed between the outer yoke 13 and the inner yoke 14 with a magnet 15 provided on the opposing surface.

A coil 17 disposed in the magnetic gap 16 of the magnetic circuit 11 is attached to the other rotating end of the carriage 9. A head 19 for reading / writing data from / to the recording surface of the magnetic disk 6 via a suspension 18 is provided at the tip of a head arm 10 formed at one rotating end of the carriage 9.

Reference numeral 20 is an FPC for transmitting and receiving signals to and from the head 19 provided on each head arm 10. Next, the suspension 18 will be described with reference to FIG. In the figure, reference numeral 21 denotes a spring arm to which the head 19 is attached to the tip end portion thereof via a gimbal spring 22. The base end of the spring arm 21 is a spacer 23.
It is attached to the tip of the head arm 10 via. Reference numeral 24 is a lead wire for transmitting / receiving a signal to / from the head 19, and 25 is a tube for protecting the lead wire 24.

Next, the operation of the magnetic disk device having the above structure will be described. When the magnetic disk device is off, the head 19 is pressed against the magnetic disk 6 by the urging force of the spring arm 21.

When the magnetic disk device is turned on, the magnetic disk 6 is rotationally driven at high speed by an inner hub motor (not shown) (for example, 3600 rpm). Magnetic disk 6
A negative pressure is generated in the negative pressure generating portion of the head 19 by the air flow generated by the rotation of the head 19, and the head 19 floats above the magnetic disk 6 with a minute gap against the biasing force of the spring arm 21.

The control unit (not shown) is the magnetic circuit 11
When a current is passed through the coil 17, the thrust force that rotates the carriage 9 is generated in the coil 17, the head arm 10 rotates in the direction crossing the track of the magnetic disk 6, and the head 19 moves to the target track. Data is read / written from / to the magnetic disk 6.

The gimbal spring 22 has a damper action and softly supports the head 19 with respect to the spring arm 21. Further, in recent years, a suspension having a shape as shown in FIG. 11 has also been used. The suspension 30 is a spring arm and gimbal spring integrated type.

In the drawing, 31 is a spring arm portion. The base end portion of the spring arm portion 31 is attached to the tip end portion of the head arm of the carriage via a spacer 32. Further, on both sides of the spring arm portion 31, rib portions 33 are formed which are bent substantially at right angles to the tip end portion except the base end portion. Therefore, the spring arm 3
The base end portion where the rib portion 33 of No. 1 is not formed is the rib portion 3
As compared with the portion where 3 is formed, the rigidity is weak and it has flexibility.

A gimbal spring portion 34 having a slit is formed at the tip of the spring arm portion 31 by a method such as electric discharge machining. A head 35 that reads / writes data from / to the magnetic disk is attached to the gimbal spring portion 34.

Reference numeral 36 is a wire which is formed on the suspension 30 and which connects the terminal 37 provided on the base end of the spring arm portion 31 and the head 35 to send and receive signals to and from the head 35. .

[0016]

On the other hand, in recent years, due to high density mounting of the magnetic disks 6, the distance between the magnetic disks 6 is increased.
L is getting shorter.

However, when the suspension 30 having the above structure is used, as shown in FIG.
A lead wire 40 for transmitting a signal to a circuit on the side of the disk device main body is connected to a terminal 37 provided at the base end portion of the using a solder 41.

Therefore, when some impact is applied to the magnetic disk device, the magnetic disk 6 and the head arm 10 vibrate, the solder 41 and the lead wire 40 on the terminal 37 come into contact with the magnetic disk 6, and There is a problem that the data recorded on the disk 6 is destroyed.

The present invention has been made in view of the above problems, and an object thereof is to provide a suspension and a disk device which do not cause data destruction even when a recording medium is mounted at a high density.

[0020]

FIG. 1 is a principle view of the first invention, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a front view. In the figure, 50 is provided with a head 51 on the tip end side, a spacer mounting surface 50a is formed on the base end side, and terminals 52 of wiring 53 connected to the head 51 are formed on the base end side. It is a suspension.

On the base end side of the suspension 50, a spacer 54 provided on the spacer mounting surface 50a.
A recessed portion 55 is formed in the thickness direction of the
A terminal 52 is provided on the bottom of the device 5.

Here, as the mode of the wiring 53, there are a wiring directly formed on the suspension 50 and an FPC (flexible printed circuit). Further, in order to suppress the vibration of the suspension, it is desirable to form a recess, which is stacked with the recess formed in the base end portion of the head arm, in the spacer attached to the spacer attachment surface.

Further, in order to suppress the vibration of the suspension, it is desirable to form a rib portion bent on a side portion of the spacer in a direction substantially orthogonal to the recording surface of the recording medium.
According to a second aspect of the present invention, a recording medium that is rotationally driven, a head that reads / writes data from / to the recording medium, a head is provided on the tip end side, and a spacer mounting surface is formed on the base end side. And a suspension in which the terminal of the wiring connected to the head is formed on the base end side, and a carriage to which the suspension is attached via a spacer and which drives the head in a direction traversing the track of the recording medium. In the disk device including the above, a recessed portion that is recessed in the thickness direction of the spacer provided on the spacer mounting surface is provided on the base end side of the suspension, and the terminal is provided at the bottom of the recessed portion.

[0024]

In the suspension of the first invention shown in FIG. 1, since the terminal 52 is provided at the bottom of the recess 55,
The wire connected to the terminal 52 and the solder formed on the terminal 52 are accommodated in the recess 55. Therefore, the distance between the suspension side and the recording medium becomes wider than before, and even if the recording medium side and the suspension 50 side vibrate due to the impact on the device, the suspension side is less likely to contact the recording medium, and the data of the recording medium is Is less likely to be destroyed.

Further, by forming a recess, which is laminated with the recess formed in the base end portion of the head arm, in the spacer attached to the spacer attachment surface, the rigidity of the base end portion of the suspension is increased and the suspension The amplitude can be reduced, and the data on the recording medium is less likely to be destroyed.

Further, by forming a rib portion bent in a direction substantially perpendicular to the recording surface of the recording medium on the side portion of the spacer, the rigidity of the spacer is enhanced and the amplitude of the suspension can be further reduced. It is even more difficult for data on the recording medium to be destroyed.

In the disk device according to the second aspect of the present invention, a recess recessed in the thickness direction of the spacer provided on the spacer mounting surface is provided on the base end side of the suspension,
Since the terminal is provided at the bottom of the recess by providing the terminal at the bottom of the recess, the wire connected to the terminal and the solder formed on the terminal fit into the recess. Therefore, the distance between the recording medium and the recording medium becomes wider than before, and even if an impact is applied to the device and the recording medium and the suspension side vibrate, the suspension side is less likely to contact the recording medium and data destruction of the recording medium is less likely to occur. .

[0028]

Embodiments of the present invention will be described with reference to the drawings. 2 is a perspective view of a suspension according to the first embodiment of the present invention, FIG. 3 is a partially cutaway plan view of a magnetic disk device as a disk device provided with the suspension shown in FIG. 2, and FIG. It is a figure.

First, the overall structure of the disk device of this embodiment will be described with reference to FIGS. In these figures, 61 is an enclosure. The enclosure 61 is composed of a base portion 62 whose top and corners are open, and a lid 63 which covers the top. The inner hub motor (not shown) drives the base 62 to rotate.
A spindle hub 64 (for example, 3600 rpm) is provided. A plurality of magnetic disks 66 (six in this embodiment) are attached to the outer cylindrical surface of the spindle hub 64 via a spacer 65.

Further, a shaft 67 is provided on the base portion 62.
Is erected. The shaft 67 has a bearing 68.
A carriage 69 is rotatably provided via the.
A head arm 70 that extends in the recording surface direction of each magnetic disk 66 and that rotates in a direction traversing the track of the magnetic disk 66 is formed at one rotating end of the carriage 69.

A magnetic circuit 71 is provided at a corner of the enclosure 61. The magnetic circuit 71 covers the corners of the base 62 and the lid 63 and forms an outer shell of the magnetic disk device, an inner yoke 74 connected to the outer yoke 73, and the outer yoke 73. And a magnet 75 provided on the surface facing the inner yoke 74, and a magnetic gap 76 is formed between the outer yoke 73 and the inner yoke 74.

At the other rotating end of the carriage 69, a coil 77 arranged in the magnetic gap 76 of the magnetic circuit 71.
Is installed. A head 79 for reading / writing data from / to the recording surface of the magnetic disk 66 via a suspension 78 is provided at the tip of a head arm 70 formed at one rotating end of the carriage 69.

Reference numeral 80 denotes an FPC that sends and receives signals to and from the head 79 provided on each head arm 70. Next, the suspension 78 will be described with reference to FIG.
In the figure, 90 is a spring arm part. A spacer attachment surface 90 to which a spacer 91 is attached is formed at the base end portion of the spring arm portion 90, and the suspension 78 is attached to the tip end of the head arm 70 of the carriage 69 via the spacer 91 attached to the spacer attachment surface 90a. It is attached to the section.

A gimbal spring portion 92 having a slit is formed at the tip of the spring arm portion 91 by a method such as electric discharge machining. A head 79 for reading / writing data from / to the magnetic disk is attached to the gimbal spring portion 92.

A recess 90b recessed toward the spacer 91 is formed at the base end of the spring arm 90, and a rib 90c bent at a substantially right angle is formed on the side. Further, 94 is a wiring which is formed on the suspension 78 and which connects the terminal 93 provided on the bottom of the recess 90b of the spring arm portion 90 with the head 79 and transmits / receives a signal to / from the head 79.

Next, the operation of the magnetic disk device having the above structure will be described. When the magnetic disk device is off, the head 79 is pressed against the magnetic disk 66 by the urging force of the spring arm portion 90 of the suspension 78.

When the magnetic disk device is turned on, the magnetic disk 66 is rotationally driven at high speed by an inner hub motor (not shown) (for example, 3600 rpm). The head 7 is moved by the air flow generated by the rotation of the magnetic disk 66.
Negative pressure is generated in the negative pressure generating portion 9 of the spring arm 9
The head 79 flies above the magnetic disk 66 with a minute interval against the biasing force of zero.

The control unit (not shown) is a magnetic circuit 71.
When an electric current is applied to the coil 77, a thrust force for rotating the carriage 69 is generated in the coil 77, and the head arm 70 is rotated.
Rotates across the tracks on the magnetic disk 66,
The head 79 moves to a target track, and data reading / writing is performed on the magnetic disk 66.

Next, the manufacturing process of the suspension having the above structure will be described with reference to FIG. (1) An insulating film, a conductive film, and a protective film are formed on a stainless steel thin plate according to the patterns of the wiring 94 and the terminal 93 (step 1).

(2) After the film formation, the stainless thin plate is formed into a desired outer shape of the suspension 78 by a punching method, an electric discharge machining method, or the like (step 2). (3) Next, using the bending method, the recess 90b and the rib 9 are formed.
0c is formed (step 3).

(4) Mount the spacer 91 and the head 79 (step 4). According to the above configuration, since the terminal 93 is provided at the bottom of the recess 90 of the suspension 78, the wire connected to the terminal 93 and the solder formed on the terminal 93 do not contact the recess 90b.
Housed within. Therefore, the gap between the suspension 78 side and the magnetic disk 66 serving as a recording medium becomes wider than in the conventional case, and even if a shock is applied to the device and the magnetic disk 66 side and the suspension 78 side vibrate, the suspension 7
The 8 side is less likely to contact the magnetic disk 66, and the data on the magnetic disk 66 is less likely to be destroyed.

In the above embodiment, the wiring 94 is formed on the suspension 78, but the FPC is used.
May be. Next, a second embodiment of the present invention will be described with reference to FIG. The difference between this embodiment and the first embodiment is the shape of the spacer, and the other portions are the same as those in the first embodiment, so the description of the same portions will be omitted.

At the tip of the spacer 100, a recess 100a is formed which is laminated on the recess 90b of the spring arm 90 of the suspension 78. According to the above configuration, in addition to the effect of the first embodiment, the rigidity of the base end portion of the spring arm portion 90 of the suspension 78 is increased, and the suspension 78 generated by the impact applied to the device.
Can be made smaller, and the data on the magnetic disk 66 is less likely to be destroyed.

Next, a third embodiment of the present invention will be described with reference to FIG. (a) is a diagram for explaining a main part, and (b) is a cross-sectional view taken along the line CC in (a). The difference between the present embodiment and the first embodiment is the shape of the spacer, and the other parts are the same as those of the first embodiment, so the description of the same parts will be omitted.

At the tip of the spacer 110, a recess 110a is formed which is laminated on the recess 90b of the spring arm 90 of the suspension 78. Further, rib portions 110b bent in a direction substantially orthogonal to the recording surface of the magnetic disk 66 are formed on both sides of the spacer 110.

According to the above construction, in addition to the effects of the first and second embodiments, the rigidity of the spacer 110 is increased, and the vibration amplitude of the suspension 78 generated by the impact applied to the device can be reduced, Furthermore, the data on the magnetic disk 66 is less likely to be destroyed.

In each of the above embodiments, the magnetic disk device is used as the disk device.
The disk device is not limited. Alternatively, a magneto-optical disk device or a compact disk device may be used.

[0048]

As described above, according to the suspension of the first invention, since the terminal is provided at the bottom of the recess, the wire connected to the terminal and the solder formed on the terminal are It is accommodated in the recess. Therefore, the distance between the suspension side and the recording medium becomes wider than in the conventional case, and even if an impact is applied to the device and the recording medium side and the suspension side vibrate, it becomes difficult for the suspension side to contact the recording medium,
Data on the recording medium is less likely to be destroyed.

Further, by forming a recess, which is laminated with the recess formed at the base end of the head arm, in the spacer attached to the spacer mounting surface, the rigidity of the base end of the suspension is increased and the suspension The amplitude can be reduced, and the data on the recording medium is less likely to be destroyed.

Further, by forming a rib portion bent in a direction substantially orthogonal to the recording surface of the recording medium on the side portion of the spacer, the rigidity of the spacer is enhanced and the amplitude of the suspension can be further reduced. It is even more difficult for data on the recording medium to be destroyed.

According to the disk device of the second aspect of the present invention, the recessed portion in the thickness direction of the spacer provided on the spacer mounting surface is provided on the base end side of the suspension,
Since the terminal is provided at the bottom of the recess by providing the terminal at the bottom of the recess, the wire connected to the terminal and the solder formed on the terminal fit into the recess. Therefore, the distance between the recording medium and the recording medium becomes wider than before, and even if an impact is applied to the device and the recording medium and the suspension side vibrate, the suspension side is less likely to contact the recording medium and data destruction of the recording medium is less likely to occur. .

[Brief description of drawings]

FIG. 1 is a principle diagram of a first invention.

FIG. 2 is a perspective view of the suspension according to the first embodiment of the present invention.

3 is a partially cutaway plan view of a magnetic disk device provided with the suspension shown in FIG.

4 is a sectional view taken along line BB in FIG.

5 is a flow diagram illustrating a manufacturing process of the suspension shown in FIG. Is.

FIG. 6 is a configuration diagram of a second embodiment of the present invention.

FIG. 7 is a configuration diagram of a third embodiment of the present invention.

FIG. 8 is a partially cutaway plan view of a magnetic disk device as an example of the disk device.

9 is a cross-sectional view taken along the line AA in FIG.

FIG. 10 is a perspective view of a spring arm in FIG.

FIG. 11 is a perspective view of another configuration of the spring arm in FIG.

FIG. 12 is a diagram illustrating a problem.

[Explanation of reference numerals] 50 suspension 50a spacer mounting surface 51 head 52 terminal 53 wiring 54 spacer

Claims (6)

[Claims] 1. A suspension in which a head is provided on the tip end side, a spacer mounting surface is formed on the base end side, and terminals of wiring connected to the head are formed on the base end side, A suspension characterized in that a recessed portion that is recessed in the thickness direction of a spacer provided on the spacer mounting surface is provided on the base end side of the suspension, and the terminal is provided at the bottom of the recessed portion. 2. The suspension according to claim 1, wherein the wiring is directly formed on the suspension. 3. The suspension according to claim 1, wherein the wiring is an FPC (flexible printed circuit). 4. The spacer mounted on the spacer mounting surface is formed with a recess that is stacked with a recess formed in the base end of the head arm.
4. The suspension according to any one of 3 to 3. 5. The suspension according to claim 1, wherein a rib portion bent in a direction substantially orthogonal to a recording surface of the recording medium is formed on a side portion of the spacer. 6. A recording medium that is rotationally driven, a head that reads / writes data from / to the recording medium, a head is provided on the tip end side, and a spacer mounting surface is formed on the base end side. And a suspension in which terminals of wiring connected to the head are formed on the base end side, and a carriage to which the suspension is attached via a spacer and which drives the head in a direction traversing the track of the recording medium. A disk device including: a disk drive characterized in that a recess recessed in the thickness direction of a spacer provided on the spacer mounting surface is provided on the base end side of the suspension, and the terminal is provided at the bottom of the recess. apparatus.