JP2008305454A - HEAD ACTUATOR ASSEMBLY, DISK DEVICE EQUIPPED WITH THE SAME, AND METHOD FOR MANUFACTURING HEAD ACTUATOR ASSEMBLY - Google Patents

Abstract

A method of manufacturing a head actuator assembly and a disk device capable of improving manufacturing efficiency.
A head actuator assembly includes a carriage and a substrate unit connected to the carriage. The carriage has a bearing portion 24, a plurality of arms, a suspension, a head 33 mounted on the extended end of each suspension, and a relay FPC that is electrically connected to the head. The board unit has a base portion and a main FPC 42 extending from the base portion. The main FPC is attached to the carriage and connected to the connecting portion of the relay FPC. The connecting end portion 42a is connected from the connecting end portion to the base portion. And a folded portion 42d that is folded back. A holding member 80 is attached to the carriage. The holding member includes a support portion 82 attached to the carriage, and an engagement portion 84 that extends from the support portion and engages with the folded portion of the main FPC and is held in the folded state.
[Selection] Figure 3

Description

  The present invention relates to a head actuator assembly including a carriage that supports a head, a disk device including the head actuator assembly, and a method of manufacturing the head actuator assembly.

  As a disk device, for example, a magnetic disk device is generally a magnetic disk disposed in a case, a spindle motor that supports and rotates a magnetic disk, a carriage that supports a magnetic head, a voice coil motor that drives a carriage, a flexible A printed circuit board unit (hereinafter referred to as an FPC unit) or the like is provided.

  The carriage includes a bearing portion attached to the case and a plurality of arms stacked on the bearing portion and extending from the bearing portion, and a magnetic head is attached to each arm via a suspension. The FPC unit is integrally formed with a base portion on which electronic components, connectors, and the like are mounted, and a main flexible printed circuit board (hereinafter referred to as a main FPC) extending from the base portion to the vicinity of the bearing portion. . The extended end portion of the main FPC constitutes a connection portion. The connection portion is provided with a plurality of connection pads and screwed to the bearing portion of the carriage.

  A relay flexible printed circuit board (hereinafter referred to as a relay FPC) is fixed on each arm and suspension of the carriage, one end of which is connected to the magnetic head, and the other end is connected to a connection portion of the main FPC. A plurality of connection pads are provided on the other end of each relay FPC, and by soldering these connection pads to connection pads provided on the connection portion side of the main FPC, the relay FPC and the main FPC are electrically and Mechanically connected. Thereby, each magnetic head supported on the suspension is electrically connected to the FPC unit via the relay FPC and the main FPC.

The main FPC is folded back from the connection portion attached to the carriage and extends to the base portion of the FPC unit due to the arrangement of components such as the carriage and the FPC unit. In order to hold such a main FPC in a properly folded state, a holder is attached to a folded portion of the main FPC, and a hook of the holder is engaged with the folded main FPC (for example, Patent Documents 1 and 2). ).
JP 2005-190503 A JP 2001-24356 A

  According to the magnetic disk apparatus configured as described above, at the time of assembly, a holder is attached in advance to the folded portion of the main FPC, and the connecting portion of the main FPC is fixed to the carriage, and then the hook of the holder is attached to the holder main body and By fitting into the main FPC, the main FPC is held in a folded state.

  However, as described above, at the time of assembling, two steps of attaching the holder to the main FPC in advance and fitting the hook of the holder after the main FPC is folded back are required. For this reason, the number of assembly steps is large and the production efficiency is lowered.

  The present invention has been made in view of the above points, and an object of the present invention is to manufacture a head actuator assembly capable of reducing the number of assembling steps and improving manufacturing efficiency, a disk device including the head actuator assembly, and manufacturing a head actuator assembly. It is to provide a method.

In order to achieve the above object, a head actuator assembly according to an aspect of the present invention includes a bearing portion, a plurality of arms each extending from the bearing portion, a suspension extending from an extension end of each arm, Relay flexible print having a head mounted on the extended end, one end portion mounted on the arm and suspension, respectively, electrically connected to the head, and a connecting portion located on the base end side of the arm A carriage having a circuit board; and
A base portion on which electronic components are mounted; a connection end portion that extends from the base portion and is attached to the carriage and connected to a connection portion of the relay flexible printed circuit board; and the base portion from the connection end portion A main flexible printed circuit board having a folded portion folded toward the board, and a board unit comprising:
A support member attached to the carriage; and a holding member that extends from the support member and engages with a folded portion of the main flexible printed circuit board and is held in a folded state. Yes.

A disc apparatus according to another aspect of the present invention includes a disc having a recording area, a drive unit that supports and rotates the disc, a head that records and reproduces information on the disc, and the head is attached to the disc A head actuator assembly that is movably supported and positioned at an arbitrary position with respect to the disk,
The head actuator assembly includes:
A bearing portion, a plurality of arms each extending from the bearing portion, a suspension extending from the extending end of each arm, a head mounted on the extending end of each suspension, and each mounted on the arm and the suspension. A relay flexible printed circuit board having one end electrically connected to the head and a connecting portion located on the base end side of the arm, and a carriage,
A base portion on which electronic components are mounted; a connection end portion that extends from the base portion and is attached to the carriage and connected to a connection portion of the relay flexible printed circuit board; and the base portion from the connection end portion A main flexible printed circuit board having a folded portion folded toward the board, and a board unit comprising:
A support member attached to the carriage; and a holding member that extends from the support member and engages with a folded portion of the main flexible printed circuit board and is held in a folded state. Yes.

  In a method of manufacturing a head actuator assembly according to another aspect of the present invention, a connection end portion of a main flexible printed circuit board is fixed to a carriage, and a connection portion of a relay flexible printed circuit board is connected to a connection end portion of the main flexible printed circuit board. The holding member is attached to the carriage, and the folded portion of the main flexible printed circuit board is folded and held in a predetermined direction by the engaging portion of the holding member.

  According to the above configuration, the folded portion of the main flexible printed circuit board can be formed and held by only one step of mounting the holding member on the carriage, thereby reducing the number of assembly steps and improving the manufacturing efficiency. A possible head actuator assembly, a disk apparatus including the head actuator assembly, and a method of manufacturing the head actuator assembly can be provided.

  An embodiment in which the present invention is applied to a hard disk drive (hereinafter referred to as HDD) as a disk device will be described in detail below with reference to the drawings.

  As shown in FIG. 1, the HDD has a rectangular box-shaped case 10 having an upper surface opened, and a top cover (not shown) that is screwed to the case with a plurality of screws to close the upper end opening of the case. .

  In the case 10, there are two magnetic disks 12a and 12b as recording media, a spindle motor 13 for supporting and rotating these magnetic disks, a plurality of magnetic heads for recording and reproducing information with respect to the magnetic disks, these The carriage 14 is movably supported with respect to the magnetic disks 12a and 12b, the voice coil motor (hereinafter referred to as VCM) 16 for rotating and positioning the carriage, and the magnetic head is moved to the outermost periphery of the magnetic disk. A ramp loading mechanism 18 that holds the magnetic head at a position away from the magnetic disk, an inertia latch mechanism 20 that holds the carriage in the retracted position when an impact or the like is applied to the HDD, and a flexible mounted electronic component such as a preamplifier. Printed circuit board unit (hereinafter referred to as FPC unit) That) 17 is housed. The carriage 14 and the FPC unit 17 constitute a head actuator assembly that drives a magnetic head.

  A printed circuit board (not shown) that controls the operation of the spindle motor 13, the VCM 16, and the magnetic head via the FPC unit 17 is screwed to the outer surface of the case 10 and is positioned facing the bottom wall of the case. Yes.

  Each of the magnetic disks 12a and 12b is formed with a diameter of 65 mm (2.5 inches), for example, and has magnetic recording layers on the upper surface and the lower surface. The two magnetic disks 12a and 12b are coaxially fitted to a hub (not shown) of the spindle motor 13 and clamped by a clamp spring 21, and are stacked at a predetermined interval in the axial direction of the hub. . The magnetic disks 12a and 12b are rotated at a predetermined speed by a spindle motor 13 as a drive unit.

  As shown in FIGS. 1 to 3, the carriage 14 includes a bearing assembly 24 fixed on the bottom wall of the case 10. The bearing assembly 24 that functions as a bearing portion includes a pivot 23 that is erected on the bottom wall of the case 10, and a cylindrical hub 26 that is rotatably supported on the pivot via a pair of bearings. Yes. An annular flange 29 is formed at the upper end of the hub 26, and a screw portion 26b is formed at the outer periphery of the lower end portion of the hub.

  The carriage 14 includes four arms 27a, 27b, 27c and 27d attached to the hub 26, four suspensions 32 extending from the respective arms, a magnetic head 33 supported by the extension end of the suspension, and 3 Two spacer rings 28a, 28b, 28c are provided.

  Each of the arms 27a to 27d is formed into a thin flat plate having a thickness of about 350 μm, for example, of a stainless steel material such as SUS304, and a circular through hole 31 is formed at one end, that is, the base end. ing. Each arm 27a to 27d has a protrusion protruding from its base end, and a positioning hole 35 is formed in the protrusion.

  Each suspension 32 is constituted by an elongated leaf spring having a plate thickness of 60 to 70 μm, and its base end is fixed to the tip of the arms 27a to 27d by spot welding or adhesion, and extends from the arm. Note that the suspension and the arm may be integrally formed of the same material.

  Each magnetic head 33 has a substantially rectangular slider (not shown) and an MR (magnetoresistive) head for recording / reproduction formed on the slider, and is fixed to a gimbal portion formed at the tip of the suspension 32. Yes. Each magnetic head 33 has a plurality of electrodes (not shown).

  As shown in FIG. 2, each magnetic head 33 of the carriage 14 is electrically connected to a main FPC 42 described later via a relay flexible printed circuit board (hereinafter referred to as a relay FPC) 62. The relay FPC 62 is attached to each arm of the carriage 14 and the surface of the suspension 32, and extends from the distal end of the suspension to the pivot base end of the arm. The relay FPC 62 is formed in an elongated strip shape as a whole, and its tip is electrically connected to the electrode of the magnetic head 33. The base end portion of the relay FPC 62 extends outward from the base end of the arm, and constitutes a connection portion 64 having a plurality of connection pads.

  As shown in FIGS. 2 and 3, the four arms 27 a, 27 b, 27 c, and 27 d to which the magnetic head 33, the suspension 32, and the relay FPC 62 are attached are inserted into the through holes 31 through the hub 26. It is fitted on the outer periphery of the hub while being laminated on the flange 29 along the axial direction of 26. The spacer ring 28a is fitted between the arms 27a and 27b, the spacer ring 28b is fitted between the arms 27c and 27d, and the spacer ring 28c is fitted between the nut 37 and the arm 27d, which will be described later. Are combined. Each of the spacer rings 28a to 28c has a protrusion on the outside, and a positioning hole 39 is formed in the protrusion.

  The four arms 27a to 27d fitted to the outer periphery of the hub 26 and the spacer rings 28a, 28b, and 28c are sandwiched between a nut 37 and a flange 29 that are screwed into the screw portion 26b of the hub 26, It is fixedly held on the outer periphery of the hub 26. A positioning screw 41 is inserted from above into the positioning hole 35 provided in the arms 27a to 27d and the positioning hole 39 provided in the spacer rings 28a to 28c, and screwed into the positioning hole of the lowermost spacer ring 28c. It is. Accordingly, the arms 27a to 27d and the spacer rings 28a to 28c are positioned at predetermined positions with respect to the circumferential direction of the hub 26. The four arms 27 a to 27 d extend from the hub 26 in the same direction, and these arms and the suspension 32 can rotate integrally with the hub 26.

  The arms 27a and 27b are positioned in parallel with each other at a predetermined interval, and the suspension 32 and the magnetic head 33 attached to these arms are positioned to face each other. The arms 27c and 27d are positioned in parallel with each other at a predetermined interval, and the suspension 32 and the magnetic head 33 attached to these arms are positioned to face each other.

  As shown in FIGS. 1 to 3, the spacer ring 28b has a support frame 34 extending in the direction opposite to the arms 27a to 27d, and is integrally formed of synthetic resin or the like. A voice coil 36 constituting a part of the VCM 16 is embedded in the support frame 34 to constitute a coil assembly. Two pin-shaped terminals 43 protrude from the support frame 34, and these terminals are electrically connected to the voice coil 36 via wiring (not shown) embedded in the support frame 34.

  As shown in FIG. 2, the spacer ring 28b is integrally provided with a protruding portion 70 that protrudes to a position that is substantially flush with one side edge of the arms 27c and 27d, and this protruding portion is connected to a main FPC to be described later. A screw hole 73 for screwing the end portion 42a is formed. The support frame 34 or the spacer ring 28b is formed with a mounting portion 72 for mounting a later-described holding clip.

  As shown in FIG. 1, the FPC unit 17 includes a base portion 40 formed by bending a flexible printed circuit board into a substantially rectangular shape, and an elongated strip-like main flexible printed circuit board (hereinafter referred to as a main FPC) that extends from the base portion. 42) and is integrally formed of a common flexible printed circuit board. A plurality of electronic components such as capacitors and connectors are mounted on the base portion 40. The base portion 40 is fixed on the bottom wall of the case 10.

  As shown in FIGS. 1 to 3, the extended end portion of the main FPC 42 extending from the base portion 40 constitutes a connection end portion 42a. A large number of connection pads 45 are formed on one surface of the connection end portion 42a, and each connection pad is electrically connected to the base portion 40 side through a conductor wiring (not shown) of the main FPC 42. A plurality of capacitors 46 and a head IC 47 are mounted on the surface of the connection end 42a. A substantially rectangular reinforcing plate 50 is fixed to the other surface of the connection end 42a.

  The connection end 42a of the main FPC 42 is positioned so that the reinforcing plate 50 faces the side surface of the bearing assembly 24 of the carriage 14, and the fixing screw 74 is inserted into the screw hole 73 of the spacer ring 28b through the connection end 42a and the reinforcing plate 50. By screwing into the carriage, it is screwed to the carriage.

  The connection portions 64 of the relay FPC 62 extending from the arms 27a to 27d are positioned on the connection end portion 42a of the main FPC 42, and the connection pads of each connection portion 64 are connected to the corresponding connection pads 45 on the connection end portion 42a side. Soldered. The terminal 43 of the voice coil 36 is soldered to the connection pad of the connection end 42a. Accordingly, the main FPC 42, the four relay FPCs 62, and the terminals 43 are electrically and mechanically connected. That is, the carriage 14 and the FPC unit 17 are electrically and mechanically connected to form a head actuator assembly.

  The main FPC 42 extends from the connection end 42 a to the coil assembly side, and then is folded back in a loop shape toward the opposite direction, that is, the front end direction of the carriage 14 at the folded-back portion 42 d and extends to the base portion 40. . The folded portion 42 d is held in a folded state by a holding clip 80 attached to the carriage 14.

  As shown in FIG. 4, the holding clip 80 functioning as a holding member has a support portion 82 attached to the carriage 14 and an arm portion 84 extending from the support portion, and is integrally molded with a synthetic resin or the like. ing. The support portion 82 is formed in a substantially rectangular tube shape and has a pair of positioning portions 85 extending in parallel with each other. Moreover, the support part 82 has a pair of engaging claw part 86 extended so that elastic deformation was possible. Each engaging claw portion 86 has a claw 86 a extending at a tip portion thereof in a direction away from the support portion 82.

  The arm portion 84 that functions as an engaging portion extends obliquely from the support portion 82, that is, along the direction in which the main FPC 42 is folded back. A projecting portion 88 that protrudes along the width direction of the main FPC 42 is formed at the extending end of the arm portion 84.

  On the other hand, the mounting portion 72 of the carriage 14 to which the holding clip 80 is mounted is a rail-shaped guide portion 74 formed on the support frame 34 or the spacer ring 28b, as shown in FIGS. And a pair of fixing portions 76. The guide portion 74 extends in a direction substantially parallel to the connection end portion 42a of the main FPC 42 fixed to the carriage 14, and faces the connection end portion with a gap.

  As shown in FIGS. 5A and 5B, the holding clip 80 is inserted into the mounting portion 72 from the rear of the carriage 14 in the direction of arrow A, that is, along the folding direction of the folding portion 42d. It is installed. At this time, the guide portion 74 of the mounting portion 72 is inserted into the support portion 82 and engaged with the positioning portion 85 to guide the mounting of the holding clip 80 and to position the support portion 82. When the support portion 82 is inserted to a predetermined position, the pair of engaging claws 86 engage with the fixing portion 76 of the mounting portion 72 to lock the holding clip 80 at the predetermined position.

  The arm portion 84 of the holding clip 80 engages the main FPC with the folded portion 42d of the main FPC 42 sandwiched between the support portion 82 from the outside, and holds the folded portion in a desired folded state. At this time, the extended end portion of the arm portion 84 including the convex portion 88 is engaged with the substantially central portion in the width direction of the main FPC 42.

  As can be seen from FIG. 1, the head actuator assembly configured as described above is disposed in the HDD case 10, and the bearing assembly 24 of the carriage 14 is fixed on the bottom wall of the case. The base portion 40 of the FPC unit 17 is fixed to the bottom wall of the case 10 with screws.

  In a state where the carriage 14 is incorporated in the case 10, the magnetic disk 12a is positioned between the arms 27a and 27b, and the magnetic disk 12b is positioned between the arms 27c and 27d.

  During the operation of the HDD, the magnetic heads 33 attached to the arms 27a and 27b face the upper and lower surfaces of the magnetic disk 12a, respectively, and sandwich the magnetic disk 12a from both sides. Similarly, the magnetic head 33 attached to the arms 27c and 27d faces the upper and lower surfaces of the magnetic disk 12b, and holds the magnetic disk 12b from both sides.

  The voice coil 36 fixed to the support frame 34 of the carriage 14 is positioned between a pair of yokes 38 fixed on the case 10, and the VCM 16 is mounted together with these yokes and a magnet (not shown) fixed to one of the yokes. It is composed. When the voice coil 36 is energized, the carriage 14 rotates, and the magnetic head 33 is moved and positioned on the desired tracks of the magnetic disks 12a and 12b.

Next, a method for manufacturing the HDD, in particular, a method for assembling the head actuator assembly will be described.
First, four sets of suspension assemblies including an arm, a suspension 32, a relay FPC 62, and a magnetic head 33 are prepared. . In addition, an FPC unit 17 is prepared in advance.

  Subsequently, as shown in FIG. 6, the connection end portion 42 a of the main FPC 42 is positioned in a state where the reinforcing plate 50 faces the side surface on the base end side of the carriage 14, and is screwed to the base end portion of the carriage by the fixing screw 74. To do. Next, the connection portions 64 of the relay FPC 62 extending from the arms 27a to 27d are positioned on the connection end portions 42a of the main FPC 42, and the connection pads of each connection portion 64 are corresponding connection pads on the connection end portion 42a side. Solder to 45. Further, the terminal 43 of the voice coil 36 is soldered to the connection end 42a. Accordingly, the main FPC 42, the four relay FPCs 62, and the terminals 43 are electrically and mechanically connected.

  Subsequently, after various inspections of the carriage assembly including the magnetic head 33 and the FPC unit 17 are performed, the main FPC 42 is folded back to the magnetic head 33 side of the carriage 14 at the rear portion of the connection end 42a as shown in FIG. In this state, as shown in FIGS. 5A, 5B, 7 and 8, the holding clip 80 is mounted on the carriage mounting portion 72 from the rear of the carriage 14 along the arrow A direction. Then, it is inserted along the guide portion 74 to a predetermined position. The engaging claw portion 86 of the holding clip 80 engages with the fixing portion 76, and the holding clip 80 is attached to a predetermined position of the carriage 14. At this time, the folded portion 42d of the main FPC 42 is pressed and sandwiched by the arm portion 84 of the holding clip 80 from the outside. As a result, the folded portion 42d of the main FPC 42 is held in a folded state in a loop shape.

  The head actuator assembly is assembled and manufactured through the above steps. The head actuator assembly thus assembled is disposed in the HDD case 10, and the bearing assembly 24 of the carriage 14 is fixed on the bottom wall of the case. Further, the base portion 40 of the FPC unit 17 is fixed to the bottom wall of the case 10 with screws.

  According to the HDD configured as described above, the folded portion of the main FPC can be held by only one step of mounting the holding clip, which is a single member, on the carriage, reducing the number of assembling steps and manufacturing efficiency. Can be improved. Further, as shown in FIG. 6, since the main FPC is folded after the main FPC and the relay FPC are connected to the main FPC, the folded portion of the main FPC does not interfere during the solder connection and is high. Workability can be ensured.

  Furthermore, it is not necessary to provide a recess or opening for attaching a hook or the like for holding the folded portion at the connection end of the main FPC, so that the mounting area of the connection end can be widened and the degree of freedom in design is increased. In addition, the connection workability can be improved.

  From the above, it is possible to obtain a head actuator assembly capable of improving the manufacturing efficiency, a disk device including the head actuator assembly, and a method of manufacturing the head actuator assembly.

Next, an HDD according to another embodiment will be described.
As shown in FIG. 9, according to the second embodiment, the holding clip 80 has a protrusion 90 protruding from the extending end of the arm portion 84 toward the main FPC 42 side. In addition, a slit 92 is formed in the vicinity of the folded portion 42d of the main FPC 42, and the projection 90 of the holding clip 80 is inserted through this slit.

  According to such a configuration, the main FPC 42 can be prevented from being displaced with respect to the holding clip 80, and the folded state of the folded portion 42d can be held more reliably.

  As shown in FIG. 10, according to the third embodiment, the holding clip 80 has a pair of engaging claw portions 86 extending from the support portion 82, and these engaging claw portions face each other. It has the nail | claw 86a extended to. In this case, the mounting portion of the carriage 14 to which the holding clip 80 is mounted is formed with a recess in which the claw 86a is engaged as a fixing portion.

  In the second and third embodiments described above, the other configurations of the HDD are the same as those of the first embodiment described above, and the same reference numerals are given to the same portions, and detailed descriptions thereof are omitted. . Even when the holding clips according to the second and third embodiments are used, the same effects as those of the first embodiment described above can be obtained.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  For example, the disk device of the present invention is not limited to a disk diameter of 2.5 inches, and can be applied to a disk device having a disk diameter of 1 inch or 1.8 inches, for example. The number of magnetic disks and magnetic heads is not limited to the above-described embodiment, and can be increased as necessary.

FIG. 1 is a perspective view showing the inside of an HDD according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of a carriage assembly provided in the HDD. FIG. 3 is a perspective view of the carriage assembly. FIG. 4 is a perspective view showing a holding clip. FIG. 5 is a plan view showing a state before and after mounting the holding clip in the carriage assembly. FIG. 6 is a perspective view showing a carriage to which a main FPC is connected. FIG. 7 is a perspective view showing the carriage in a state where the main FPC is folded. FIG. 8 is a perspective view showing a carriage to which the holding clip is attached. FIG. 9 is a perspective view showing a carriage and a holding clip portion of an HDD according to the second embodiment of the present invention. FIG. 10 is a perspective view showing a holding clip of an HDD according to the third embodiment of the present invention.

Explanation of symbols

12a, 12b ... magnetic disk, 14 ... carriage, 16 ... voice coil motor,
17 ... FPC unit, 24 ... Bearing assembly,
27a, 27b, 27c, 27d ... arms,
28a, 28b, 28c ... spacer ring, 32 ... suspension,
33 ... Magnetic head, 42 ... Main FPC, 42a ... Connection end,
42d ... folded portion, 62 ... relay FPC, 64 ... connection portion, 72 ... mounting portion,
74 ... guide part, 76 ... fixing part, 80 ... holding clip, 82 ... support part,
84 ... arm part, 85 ... positioning part, 86 ... engagement claw part, 90 ... projection,
92 ... Slit

Claims (10)

A bearing portion, a plurality of arms each extending from the bearing portion, a suspension extending from the extending end of each arm, a head mounted on the extending end of each suspension, and each mounted on the arm and the suspension. A relay flexible printed circuit board having one end electrically connected to the head and a connecting portion located on the base end side of the arm, and a carriage,
A base portion on which electronic components are mounted, a connection end portion that extends from the base portion, is attached to the carriage and is connected to a connection portion of the relay flexible printed circuit board, and the vicinity of the connection end portion A main flexible printed circuit board having a folded portion folded toward the base portion, and a board unit comprising:
A holding member having a support part attached to the carriage, and an engagement part extending from the support part and engaging with the folded part of the main flexible printed circuit board and held in a folded state;
Head actuator assembly with The support portion of the holding member has a positioning portion that is positioned by being engaged with the carriage, and an engaging claw portion that holds the support portion in an attachment position.
2. The head according to claim 1, wherein the engagement portion includes an arm portion that extends obliquely from the support portion and sandwiches the folded portion of the main flexible circuit board between the support portion and the outside. Actuator assembly.   The carriage has a mounting portion to which a support portion of the holding member is attached, and the mounting portion guides and positions the positioning portion of the holding member along the folding direction of the folding portion; and The head actuator assembly according to claim 2, further comprising a fixing portion engaged with the engaging claw portion.   The head actuator assembly according to claim 3, wherein the carriage has a coil assembly that holds a coil and extends from the bearing portion, and the mounting portion is formed in the coil assembly.   2. The head according to claim 1, wherein the main flexible printed circuit board has a slit formed in the folded portion, and the holding member has a protrusion protruding from the engaging portion and inserted through the slit. Actuator assembly. A disc having a recording area;
A drive for supporting and rotating the disk;
A head for recording and reproducing information on the disk;
A head actuator assembly that supports the head movably with respect to the disk and positions the head at an arbitrary position with respect to the disk;
The head actuator assembly includes:
A bearing portion, a plurality of arms each extending from the bearing portion, a suspension extending from the extending end of each arm, a head mounted on the extending end of each suspension, and each mounted on the arm and the suspension. A relay flexible printed circuit board having one end electrically connected to the head and a connecting portion located on the base end side of the arm, and a carriage,
A base portion on which electronic components are mounted, a connection end portion that extends from the base portion, is attached to the carriage and is connected to a connection portion of the relay flexible printed circuit board, and the vicinity of the connection end portion A main flexible printed circuit board having a folded portion folded toward the base portion, and a board unit comprising:
A holding member having a support part attached to the carriage, and an engagement part extending from the support part and engaging with the folded part of the main flexible printed circuit board and held in a folded state;
A disk device comprising: The support portion of the holding member has a positioning portion that is positioned by being engaged with the carriage, and an engaging claw portion that holds the support portion in an attachment position.
The disk according to claim 6, wherein the engaging portion has an arm portion that extends obliquely from the support portion and sandwiches the folded portion of the main flexible circuit board between the support portion and the outside. apparatus.   The carriage has a mounting portion to which a support portion of the holding member is attached, and the mounting portion guides and positions the positioning portion of the holding member along the folding direction of the folding portion; and The disk device according to claim 7, further comprising a fixing portion to which the engaging claw portion is engaged. A bearing portion, a plurality of arms each extending from the bearing portion, a suspension extending from the extending end of each arm, a head mounted on the extending end of each suspension, and each mounted on the arm and the suspension. A relay flexible printed circuit board having one end electrically connected to the head and a connecting portion located on the base end side of the arm, and a carriage,
A base portion on which electronic components are mounted, a connection end portion that extends from the base portion, is attached to the carriage and is connected to a connection portion of the relay flexible printed circuit board, and the vicinity of the connection end portion A main flexible printed circuit board having a folded portion folded toward the base portion, and a board unit comprising:
A head comprising: a support portion attached to the carriage; and a holding member extending from the support portion and engaging with the folded portion of the main flexible printed circuit board and held in a folded state. A method for manufacturing an actuator assembly, comprising:
Fixing the connection end of the main flexible printed circuit board to the carriage;
Connecting the connecting portion of the relay flexible printed circuit board to the connecting end of the main flexible printed circuit board;
A method of manufacturing a head actuator assembly, wherein a support portion of the holding member is attached to the carriage, and the folded portion of the main flexible printed circuit board is folded and held in a predetermined direction by the engaging portion.   The holding member is attached to the carriage along a folding direction of the folded portion, and the folded portion is sandwiched between the support portion and the engaging portion from the outside to be held in a folded state. A manufacturing method of the head actuator assembly as described.

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