JP3041761B2 - Carriage structure of disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carriage structure of a disk drive, and more particularly, to a head signal processing IC for exchanging signals with a head and a control IC such as a servo IC for a carriage constituting a head actuator. Regarding the mounted structure. In recent years, disk devices such as magnetic disk devices and optical disk devices have been used as external storage devices for computers. The storage capacity of such a disk device has been increasing year by year, and the speed of signal exchange between the head and the control circuit of the disk device is increasing, and the influence of noise on the read / write signal of the head cannot be ignored. .

In order to amplify a small signal read from a head in a disk drive, reduce a noise at the time of reading / writing of a head for controlling a write signal to the head, and cope with a high-speed signal transfer. And control ICs such as a head signal processing IC (hereinafter simply referred to as a head IC) for processing a head read / write signal and a servo IC.
Is desirably located as close as possible to the head. Therefore, attempts have been made to mount a head IC or a servo IC on a carriage constituting a head actuator. However, even if a sufficiently small head IC and servo IC that can be considered at the present stage are used, there is not enough space on the carriage to mount the head IC, servo IC, and other necessary elements, and still, The head IC, the servo IC, and their peripheral circuits are often fixed on the base of the disk device. Therefore,
A structure that can fix the head IC, the servo IC, and their peripheral circuits near the carriage is desired.

[0003]

2. Description of the Related Art FIG. 9 shows the structure of an example of a conventional magnetic disk drive 70. 9, reference numeral 71 denotes a base; 72, a disk; 73, a spindle motor for rotating the disk 72; 74, an actuator including a carriage 75 having a head 76 at the tip and a voice coil motor 77; 80, a cover; This is a gasket provided between the cover 71 and the cover 80. In such a magnetic disk device 70, the signal reproduced by the head 76 is drawn out of the actuator 74 by a flexible circuit board 78 attached to the side surface of the carriage 75, and the fixed substrate projected on the bottom surface of the base 71. It is led on 79. A head IC and a servo IC for demodulating a read signal by the head 76 are mounted on the fixed substrate 79.

Therefore, the conventional magnetic disk device 70 has a problem that the noise tends to increase when reading / writing the head 76, and the transfer speed does not increase. Therefore, attempts have been made to mount a head IC or a servo IC on a carriage constituting a head actuator.

[0005]

However, in order to mount a head IC or a servo IC on a carriage, the first method is required.
Is very difficult, secondly, there is a problem in positioning when the flexible circuit board is mounted on the carriage, and thirdly, there is a problem of heat generation of the head IC and the servo IC. Also need to be considered.

In view of the above, the present invention provides a locking member having a specific shape on a carriage and connects the flexible circuit board to the carriage via the locking member to increase the mounting area on the carriage side. the carriage of the disk apparatus capable of enabling a head IC and the servo IC to the connection portion, and a peripheral circuit while considering the heat radiation mounting with, while reducing noise during head read / write, to increase the transfer rate It is intended to provide structure.

[0007]

According to a first aspect of the present invention, there is provided a disk drive having a carriage structure for reading / writing data from / to a recording disk incorporated in the disk drive.
A carriage structure including an arm portion provided with a head for performing writing at a distal end portion, a main body provided with a rotating shaft, and a rotor portion serving as a rotor of a voice coil motor, wherein a flat portion is provided on a side surface of the carriage main body. A locking member made of sheet metal is attached to the flat portion, and the locking member includes a flat portion that contacts the flat portion and an extension that does not contact the flat portion. the Ri Contact is extended in a direction away from the carriage body in a state where the locking member is attached to the planar portion, a flexible circuit board connected to the carriage to extract the signal line connected to the heads to the outside, engaging Before the stop member is attached to the flat portion, the free end of the flat plate portion on the front side of the stop member is wound around the stop member, and the signal line from the head is
An IC for processing a signal from the head is mounted on the flexible circuit board connected to the front end of the flexible circuit board wound around the locking member and on the front side of the locking member.

[0008] The extended portion may be an inclined plate portion inclined at a predetermined angle with respect to the plane of the flat plate portion. Further, in the first embodiment, at least one pin for positioning the flexible circuit board is protruded at a predetermined position on at least the front surface of the flat plate portion of the locking member, and the flexible circuit board has a mounting pin corresponding to the pin. Holes or notches may be provided. At the time of projecting the pin, at least one through hole is provided at a predetermined position of the flat plate portion of the locking member, and the flat plate portions on both sides of the through hole have a diameter larger than the diameter of the through hole. A pin for positioning the flexible circuit board having a protrusion is provided by molding of a resin material, and a flat portion is provided on a side surface of the main body, and an accommodation hole for receiving the pin provided on the locking member is provided. A mounting hole or notch corresponding to the pin may be provided on the substrate.

The locking member may be attached to a flat surface of the carriage by a screw, or a pin protruding from a side of the locking member attached to the flat surface of the carriage body, and a flat portion for receiving the pin. The mounting holes are fitted so as to be fixed.
On the other hand, in a second embodiment of the present invention that achieves the above object, in the carriage structure of any of the disk devices described above, the flat plate portion of the locking member is attached to a flat surface of the side surface of the carriage body. The spacer is characterized in that a spacer having an inclined surface having a larger thickness at the free end side of the flat plate portion is formed integrally with the pin by molding a resin material. In this case, a concave portion for accommodating the spacer may be provided in a flat portion on the side surface of the carriage body.

According to the carriage structure of the disk drive of the first aspect of the present invention, the flexible circuit board is attached to the locking member having the flat portion attached to the flat portion on the side surface of the main body of the carriage and the extension portion. The signal line from the head is connected to the tip of the flexible circuit board wound around the locking member, and the free end of the locking member is connected to the front end of the locking member. Since the IC for processing the signal from the head is mounted on the flexible circuit board, noise at the time of reading / writing of the head is reduced, and the data transfer speed is increased.

In this case, if a pin is provided at a predetermined position on at least the front surface of the flat plate portion of the locking member, and the flexible circuit board is provided with a mounting hole or notch corresponding to the pin. In addition, the flexible circuit board can be easily fixed to the locking member. In addition, if a pin having a diameter larger than the diameter of the through hole is provided on both sides of the through hole provided at a predetermined position of the flat plate portion of the locking member by molding with a resin material, the flexible circuit board is provided with this pin. Mounting and positioning corresponding to the pins are facilitated. In the above-described carriage structure of the disk device, the locking member is easily attached to the flat portion of the carriage by a screw. However, if the pin and the mounting hole are fitted to each other, the locking member can be mounted on the flat surface of the carriage. The part is fixed without using screws.

Further, according to the carriage structure of the disk device of the second aspect of the present invention, since the flat portion of the locking member is attached to the flat surface of the side surface of the carriage body by the spacer, the flexible circuit is provided. The take-out angle of the board from the locking member is reduced, and the fatigue of the flexible circuit board is reduced, and the durability is improved. In this case, if the concave portion for accommodating the spacer is provided on the carriage side, the spacer of the locking member is accommodated in the concave portion provided on the flat portion of the side surface of the carriage body, so that the locking member protrudes from the side surface of the carriage main body. do not do.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a carriage structure of a disk drive according to the present invention will be described below in detail with reference to the accompanying drawings based on a specific example of a magnetic disk drive. FIG. 1 shows a magnetic disk drive 10 to which a carriage structure according to an embodiment of the present invention is applied, with its cover removed. On the base 5, the carriage 1 on which the head 7 is mounted, the actuator 4 including the voice coil motor 9, the spindle motor 8 on which the disk 8D is mounted, and the like are provided.

The carriage 1 comprises an arm 11 on which the head 7 is mounted at the tip, a carriage main body 13 provided with a rotating shaft 12, and a rotor 14 serving as a rotor of the voice coil motor 9. One end of the flexible circuit board 2 is fixed to and attached to a side surface of the carriage 1 by a flexible circuit board holder 3 (hereinafter, referred to as an FPC holder 3) which is a locking member. connector 51 is provided, is mounted et the through hole 50 on the base 5 in. The base 5 is joined to the cover 6 via the gasket 6.

In the magnetic disk drive 10 configured as described above, according to the present invention, a head IC and a servo IC for demodulating a read signal by the head 7 and a chip-shaped peripheral circuit are mounted on the carriage 1 in a flexible manner. It is provided at a portion wound around the FPC holder 3 at the tip of the circuit board 2. The detailed configuration will be described below with reference to FIGS.

FIG. 2A shows the FPC holder 3 mounted on the carriage 1 of the magnetic disk drive 10 shown in FIG. 1, and FIG. 2B shows only the sheet metal constituting the FPC holder 3. It is. The FPC holder 3 includes a flat plate portion 30 attached to the carriage 1 and an extension portion 31. In this embodiment, the extension portion 31 is an inclined plate portion 31 bent from the flat plate portion 30.
The flat plate portion 30 is provided with a through hole 33 for projecting a pin and a screw hole 34 for attaching the FPC holder 3 to the carriage 1. In this embodiment, two pins 32 are protrudingly provided on both sides of the flat plate portion 30 in this embodiment to facilitate the work of attaching the flexible circuit board 2 to the FPC holder 3. This pin 32 can be made by molding a resin material.

The reason why two pins 32 are provided is that two pins 3
2 is used as a reference position for attaching the flexible circuit board 2 to the FPC holder 3 to improve assemblability.
Further, the rigidity of the molded pin 32 is increased by providing the through hole 33 in the FPC holder 3 and projecting the pin 32 at the same position on both sides of the through hole 33 in a state of being connected via the through hole 33. This is because the strength can be maintained even with a small mold pin 32.

The FPC holder 3 configured as described above
The surface on the side where the inclined plate portion 31 is bent is the surface farther from the carriage 1 and is the side exposed to the front. Therefore,
When attached to the carriage 1, the F
The surface of the PC holder 3 is hereinafter referred to as the front surface, and similarly, the FPC holder 3 on the side attached to the carriage 1.
Is referred to as a back surface.

FIG. 2 (c) shows the F of only the sheet metal shown in FIG. 2 (b).
This shows an example of a method of projecting the pins 32 by molding a resin material on the PC holder 3. In this example, a mold 40 including an upper mold 41 and a lower mold 42 is prepared. A cavity 47 is formed on the parting line 43 of the upper die 41 to accommodate the FPC holder 3 made of only sheet metal. When the FPC holder 3 is inserted into the cavity 47, the upper die 41 corresponding to the through hole 33 is formed with the upper die cavity 44 of the pin, and the lower die 42 is formed with the lower die cavity 45 of the pin. Is formed. The cavities 44 and 45 are both thicker than the diameter of the through hole 33. Each of the cavities 44 and 45 is provided with a gate 46.
Thereby, the upper die 41 and the lower die 42 communicate with each other. If such a mold 40 is filled with a resin material in a fluid state that has been overheated and melted through a gate 46, and after cooling, the upper mold 41 and the lower mold 42 are separated by a parting line 43, as shown in FIG. Thus, the FPC holder 3 having the pins 32 protruding on both sides of the flat plate portion 30 is completed. The pins 32 projecting from both sides of the flat plate portion 30 are integrally formed through the through holes 33 having a diameter smaller than the diameter of the pin 32, so that the pins 32 do not fall out of the flat plate portion 32.

FIG. 3 is a plan view showing the structure of the flexible circuit board 2 used in the present invention. The flexible circuit board 2 has a flat plate portion 30 of the FPC holder 3 from its free end side.
A surface 2A superimposed on the front surface of B, B surface 2B superimposed on the front surface of the inclined plate portion 31, C surface 2C superimposed on the back surface of the inclined portion 31, and the back surface of the flat plate portion 30 2D, and an E surface 2E superimposed on the D surface 2D are formed in this order, and the E surface 2E is followed by a swing surface 2X. Then, the E ′ surface 2 that is folded back and overlaps the E surface 2E on the side below the E surface 2E.
E 'is provided, and a swing surface 2X of this E' surface 2E 'is provided.
On the same side as, there is provided an F ′ surface 2F ′ that is folded back on the F surface 2F and overlaps the F surface 2F. Further, a base surface 2Y that is parallel to the base of the magnetic disk drive is connected to an end of the swing surface 2X, and a connector connection surface 2Z is provided at an end of the base surface 2Y. 2Z, a through hole 5 provided on the base 5 shown in FIG.
Install them connector 51 is connected to zero.

A head IC 21 for processing a signal from the head is mounted on the A surface 2A provided with the pin insertion hole 23 and the screw insertion hole 24 by a mounting method such as a surface mounting technique, and a tip end thereof is provided. An input terminal 25 for a signal from the head is provided. In addition, servo IC is provided on B side 2B.
22 and a chip component 22 constituting a peripheral circuit are mounted, and the chip component 22 is also mounted on the C surface 2C.
Further, when attached to the FPC holder 3, the A side 2A
In the D surface 2D, E surface 2E, and E 'surface 2E', which are located on the back side, the pin insertion hole 23 (or the pin insertion slit 26) is provided at a position corresponding to the pin 32 and the screw hole 34.
And a screw insertion hole 24 are provided.

FIG. 4 is an assembly perspective view showing a state in which the flexible circuit board 2 configured as shown in FIG. 3 is mounted on the FPC holder 3 shown in FIG. A surface 2A, B surface 2B, C surface 2C, D surface 2D, E surface 2E, E 'surface 2E', F surface 2F, A surface 2A, B surface 2B, C surface 2C, and F surface 2F of the flexible circuit board 2 configured as shown in FIG.
The F 'surface 2F' and the swing surface 2X are bent in the folding direction and the folding angle shown in FIG. 3, and the A surface 2A to the E surface 2E are shown in FIG.
Is attached so as to be wound around the FPC holder 3 as shown in FIG.

FIG. 5A shows a state in which the flexible circuit board 2 constructed as described above is attached to the FPC holder 3, and FIG. 5B is a section Q in FIG. 5A. Is a partially enlarged view of FIG. As shown in FIGS. 5 (a) and 5 (b),
The head IC 20, the servo IC 21, the chip component 22, and the like are located on the sheet metal FPC holder 3, so that even if these elements generate heat, the heat is transferred to the sheet metal FP.
The heat is transmitted to the carriage body 13 side by the C holder 3, and the heat radiation property is improved. Here, if an aluminum material or the like is used as the material of the FPC holder 3, the heat conduction is further improved, and the head IC 2
Heat generation such as 0 can be suppressed.

FIG. 6A shows the carriage 1 of the FPC holder 3 on which the flexible circuit board 2 is mounted as shown in FIG.
This is for explaining the attachment to the camera. As shown in FIGS. 5A and 5B, the F around which the flexible circuit board 2 is wound.
The PC holder 3 is positioned and fitted to the carriage main body 13 by fitting a pin 32 protruding inside the PC holder 3 into a pin accommodating hole 16 provided in the flat portion 15 of the carriage main body 13. When the FPC holder 3 is attached to the flat portion 15 of the carriage main body 13, the screw holes 19 provided in the flat portion 15 of the carriage main body 13 are provided.
The screw hole 34 of the FPC holder 3 and the screw insertion hole 24 provided in the flexible circuit board 2 are aligned with each other.
The holder 3 can be fixed to the carriage body 13.

The pins 32 projecting from the FPC holder 3
And the pin receiving hole 16 provided in the flat portion 15 of the carriage main body 13 in a fitting shape, the FPC holder 3 is fixed to the carriage main body 13 simply by fitting the pin 32 into the pin receiving hole 16. be able to. Then, the input terminal 2 provided at the tip of the flexible circuit board 2 of the FPC holder 3 attached to the carriage body 13
5 includes a connection terminal 28 provided at the tip of a relay flexible circuit board 27 that is attached to each side of the arm 11 of the carriage 1 and exchanges signals with each head provided at the tip of the arm 11. Connected. FIG.
Since the relay flexible circuit board 27 shown in (a) is attached to the uppermost arm portion 11 of the carriage 1 (one attached head), only one set of connection terminals 28 is provided. Since two heads are attached to each of the arm portions 11 except for the upper and lowermost arm portions 11, the shape of the relay flexible circuit board 27 attached to these arm portions 11 is shown in FIG.
It becomes as shown in.

The reason why the four output terminals 28 are provided at the end of each relay flexible circuit board 27 is that, in this embodiment, the head is a composite head having an inductive head and an MR head. . FIG. 7 shows an example of another embodiment of the carriage structure of the disk drive of the present invention. FIG. 7 (a) shows only the carriage 1 taken out of the magnetic disk drive. In this embodiment, the FPC holder 3 'and the main body 1 of the carriage 1 are
Only the structure of the mounting surface of the FPC holder 3 'is different from that of the above-described embodiment, and the configuration on the flexible circuit board 2 side is exactly the same as that of the above-described embodiment. Therefore, in this embodiment, only the portions of the FPC holder 3 'that are different from the above-described embodiment will be described.

FIG. 8A shows the carriage 1 shown in FIG.
Shows an FPC holder 3 'attached to the
FIG. 8B shows the FPC holder 3 'as viewed from the back side. The sheet metal used for the FPC holder 3 'of this embodiment is the same as the sheet metal of the FPC holder 3 described with reference to FIG. 2B, and is a flat plate portion 30 attached to the carriage 1 and bent from the flat plate portion 30. The flat plate portion 30 is provided with a through hole 33 for projecting a pin and a screw hole 34 for attaching the FPC holder 3 'to the carriage 1. FIG.
(b)).

In the above-described embodiment, the through hole 3
On both sides of 3, two pins 32 were protruded by molding of a resin material. In this embodiment, the pins 32
Is formed by a mold, and the shape of the front side of the FPC holder 3 'is exactly the same as that of the FPC holder 3 of the above-described embodiment. On the other hand, this embodiment is different from the above-described embodiment in that
The difference is that a spacer 35 is formed on the back side of the PC holder 3 ′ by molding a resin material in addition to the pins 32. The spacer 35 is a flat plate portion 3 of the FPC holder 3 '.
The flat plate portion 30 is formed integrally with the pin 32 by molding with a resin material so that the free end side of the flat plate portion 30 has a larger inclined surface on the mounting surface of the carriage body 13 to the flat portion 15. I have.

On the other hand, since the spacer 35 having the inclined surface is formed on the flat plate portion 30 on the back surface side of the FPC holder 3 ', the concave portion 18 for accommodating the spacer 35 is formed on the flat portion 15 of the carriage body 13. Is formed. The shape of the recess 18 may be substantially the same as the spacer 35 formed on the back side of the FPC holder 3 ′. The spacer 35 is accommodated in the recess 18, and the FPC holder 3 ′ is attached to the side surface of the carriage 1. In this case, the front side of the FPC holder 3 ′ may not be protruded extremely from the side surface of the carriage 1.

FIG. 8 (c) shows the F of only the sheet metal shown in FIG. 2 (b).
The FPC holder 3 ′ in which the pins 32 and the spacers 35 are formed by molding a resin material on the PC holder.
1 shows an example of a method for producing a. In this example,
A mold 40 'including an upper mold 41 and a lower mold 42 is prepared. On the parting line 43 of the upper mold 41, in addition to the cavity 47 in which the FPC holder 3 made of only a sheet metal enters,
A cavity 48 for forming the spacer 35 is formed. When the FPC holder 3 is inserted into the cavity 47, an upper die cavity 44 is formed in the upper die 41 corresponding to the through hole 33, and a lower die cavity 45 is formed in the lower die 42. This is the same as FIG. 2 (c). The cavities 44 and 45 are both thicker than the diameter of the through hole 33. And each cavity 4
The gates 4 and 45 communicate with the outside of the upper mold 41 and the lower mold 42 by a gate 46. If such a mold 40 ′ is filled with a resin material in a fluidized state that has been overheated and melted through a gate 46, and after cooling, the upper mold 41 and the lower mold 42 are separated by a parting line 43. The pins 32 as shown in FIGS.
Is an FPC holder 3 'provided only on the back side of the flat plate portion 30.
Is completed. Pins 32 projecting from both sides of the flat plate portion 30
Are integrally formed through the through hole 33 having a diameter smaller than the diameter of the pin 32, so that the pin 32 and the spacer 35 do not fall out of the flat plate portion 32.

FIG. 7B shows the FPC shown in FIGS. 8A and 8B.
FIG. 7 is an enlarged view showing a connection portion of the flexible circuit board 2 of the carriage 1 when the holder 3 'is used.
FIG. 2C is an enlarged view showing a connection portion of the flexible circuit board 2 of the carriage 1 when the FPC holder 3 shown in FIG. 2A is used. As shown in FIGS. 7 (b) and (c),
In the case of the FPC holder 3 'provided with the spacer 35, a line H indicating the take-out angle of the swing surface 2X of the flexible circuit board 2 with respect to the line S indicating the mounting surface of the FPC holder 3' to the carriage 1 Is small. on the other hand,
In the FPC holder 3 in which the spacer 35 is not provided,
A line H indicating the take-out angle of the swing surface 2X of the flexible circuit board 2 with respect to a line S indicating the mounting surface to the carriage 1
Is larger than the angle θ1. Therefore, the FPC holder 3 'provided with the spacer 35 has a smaller swing angle of the swing base of the swing portion 2X of the flexible circuit board 2, and the durability of the flexible circuit board 2 is smaller than the FPC holder without the spacer 35. A little better than 3.

Although the carriage structure of the disk device of the present invention has been described with reference to the embodiment of the magnetic disk device, the structure of the present invention can be applied to other disk devices such as an optical disk device. According to the present invention, there are the following advantages. (1) The FPC holder 3 made of a bent sheet metal is mounted on the side surface of the main body 13 of the carriage 1 with the flexible circuit board 2 wound around the FPC holder 3.
By securing the mounting area by the bent portion of the C holder 3, it is possible to mount a circuit component for processing a signal from a head such as the head IC 20 on the side surface of the carriage 1.

(2) To facilitate the work of mounting the flexible circuit board 2 on the carriage 1, the FPC holder 3
The pins 32 are formed on both sides of the FPC by molding, and the mold pins 32 are used as a reference when the flexible circuit board 2 is mounted on the FPC holder 3 and as a reference when the FPC holder 3 is mounted on the carriage 1. 1 can improve the assemblability. At this time, the positions of the mold pins 32 attached to both sides are set to the same position on the front and back of the FPC holder 3, and a through hole 33 is opened in a sheet metal therebetween to connect the mold pins 32 on both sides, thereby increasing the rigidity of the mold pins 32. The strength can be secured even with a sufficiently small mold pin 32.

(3) Regarding the problem of heat generation of the head IC,
By using a sheet metal for the FPC holder 3, heat conduction is improved. Here, if an aluminum material or the like is used, heat conduction is further improved, and heat generation of circuit components mounted on the flexible circuit board 2 wound around the FPC holder 3 can be suppressed. In the embodiment described above, the extension 31 of the FPC holder 3 has been described as the inclined plate 31 which is bent at a predetermined angle from the flat plate 30. However, the shape of the extension 31 is not limited to this embodiment. Not the flat part 30
It may be a curved plate that is extended so as to be curved.

Further, in the structure of the carriage 75 of the conventional magnetic disk device 70 described with reference to FIG. 9, even when the structure of the flat plate portion 30 of the FPC holder 3 of the present invention is adopted, the flexible circuit board 78 Positioning when attaching to the side surface is facilitated.

[0036]

As described above, according to the present invention,
The carriage is provided with a locking member having a specific shape, and the flexible circuit board is connected to the carriage via the locking member to increase the mounting area on the carriage side. It is possible to mount the IC and the peripheral circuits in a state in which heat dissipation is taken into consideration, thereby reducing the noise at the time of reading / writing of the head and increasing the transfer speed.

[Brief description of the drawings]

FIG. 1 is a plan view of a magnetic disk drive employing a carriage structure of a disk drive according to the present invention.

2A is a plan view of an FPC holder attached to a side surface of the main body of the carriage shown in FIG. 1, FIG. 2B is a perspective view of a sheet metal constituting the FPC holder, and FIG. 2C is a manufacturing example of the FPC holder. FIG.

FIG. 3 is a plan view showing a configuration of a flexible circuit board used in the present invention.

4 is an assembly perspective view showing a state in which the flexible circuit board shown in FIG. 3 is attached to the FPC holder shown in FIG. 2;

5A is a plan view of an FPC holder with a flexible circuit board attached thereto, and FIG. 5B is a partially enlarged view of a portion Q in FIG. 5A.

6 (a) is an assembly perspective view for explaining the mounting of the FPC holder on which the flexible circuit board is mounted to the carriage, and FIG. 6 (b) is a portion of the relay flexible circuit board which is mounted on the side surface of the arm section of FIG. 6 (a). It is an enlarged view.

7A is a plan view of a carriage according to another embodiment of the carriage structure of the disk device of the present invention, and FIG. 7B is an FP of FIG.
FIG. 3C is a diagram illustrating the direction of taking out the flexible circuit board when the C holder is used, and FIG. 2C is a diagram illustrating the direction of taking out the flexible circuit board when the FPC holder of FIG. 2A is used.

8 (a) is a plan view of an FPC holder attached to a side of the main body of the carriage shown in FIG. 7, (b) is a perspective view of the FPC holder of (a), and (c) is a view of the FPC holder of (a). It is a figure explaining a manufacture example.

FIG. 9 is a perspective view showing a configuration of a conventional magnetic disk drive.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Carriage 2 ... Flexible circuit board 3 ... FPC holder (locking member) 4 ... Actuator 11 ... Arm part 13 ... Carriage main body 15 ... Flat part 16 ... Housing hole 18 ... Depression 20 ... Head IC 22 ... Chip component 23 ... Pin Insertion hole 24 ... Screw insertion hole 25 ... Input terminal 27 ... Relay flexible circuit board 28 ... Connection terminal 30 ... Plate part 31 ... Inclination plate part (extended part) 32 ... Pin 33 ... Through hole 34 ... Screw hole 35 ... Spacer 51 ... connector

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-2844 (JP, A) JP-A-6-68651 (JP, A) JP-A 9-69267 (JP, A) 5296 (JP, U) U.S. Pat. No. 5,095,396 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 21 / 02,25 / 04

Claims (8)

(57) [Claims] 1. An arm provided with a head for reading / writing from / to a recording disk incorporated in a disk device at a tip, a main body provided with a rotating shaft, and a rotor of a voice coil motor. A carriage structure including a rotor portion, wherein a flat portion is provided on a side surface of the main body, and a locking member made of a sheet metal is attached to the flat portion, and the locking member includes the flat portion. are composed of an extension portion not in contact with the flat plate portion in contact with, and extends in a direction away from the body in the extension state where the locking member is attached to the flat portion, the heads The flexible circuit board connected to the carriage to take out the signal line connected to the outside of the flat plate portion of the locking member before the locking member is attached to the flat portion. A signal line from the head is wound around the locking member from the end side, and a signal line from the head is connected to a distal end portion of the flexible circuit board wound around the locking member, and is placed on a flexible circuit board on the front side of the locking member. A carriage structure for a disk drive, wherein an IC for processing a signal from the head is mounted. 2. The carriage structure for a disk drive according to claim 1, wherein said extension portion is an inclined plate portion inclined at a predetermined angle with respect to a plane of said flat plate portion. At least one pin for positioning at least one of the flexible circuit boards protrudes at a predetermined position on at least a front surface of the flat plate portion of the locking member, and is attached to the flexible circuit board at a position corresponding to the pins. 3. The carriage structure for a disk drive according to claim 1, wherein a hole or a notch is provided. 4. At least one through hole is provided at a predetermined position of the flat portion of the locking member, and the flat portions on both sides of the through hole have a diameter larger than the diameter of the through hole. A pin for positioning the flexible circuit board is protruded by molding of a resin material, and a flat portion on a side surface of the main body is provided with a receiving hole for receiving the pin protruded from the locking member, 3. The carriage structure for a disk drive according to claim 1, wherein a mounting hole or a notch corresponding to the pin is provided in the flexible circuit board. 5. The carriage structure according to claim 3, wherein the locking member is screwed to a flat portion of the carriage. 6. The locking member is formed by fitting a pin protruding from a side of the locking member to be attached to the flat portion and a receiving hole provided in the flat portion to receive the pin. The carriage structure for a disk drive according to claim 4, wherein the carriage structure is fixed to a flat portion of the carriage . 7. A resin material mold, wherein a spacer having an inclined surface having a larger thickness at a free end side of the flat plate portion is provided on a mounting surface of the flat plate portion of the locking member to a flat surface portion of the main body. 7. The disk drive according to claim 2, wherein the pin is formed integrally with the pin.
Carriage structure. 8. A concave portion for accommodating the spacer is provided in a plane portion of the main body.
The carriage structure of the disk device according to 1.