JP2005032395A - Head suspension assembly and recording disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head suspension assembly and a recording disk drive by which the vibration of an actuator arm can be comparatively simply suppressed. <P>SOLUTION: In the recording disk drive 11, a groove 31 is formed on an actuator arm 18. Inwall surfaces 31a, 31b which are mutually faced are regulated in the groove 31. The groove 31 receives a flexible printed board (FPC) 28. An elastic part 28c for pressing the FPC 28 to the inwall surfaces 31a, 31b is sectioned in the FPC 28. The elastic part 28c is formed on the basis of the wave of the FPC 28. In the recording disk drive 11, the FPC 28 is pressed to the inwall surfaces 31a, 31b by the action of the elastic part 28c. Even when an air current is generated on the surface of the recording disk 13, the vertical movement of the FPC 28 can be surely interrupted in the groove 31. Consequently the vibration of the actuator arm 18 can be comparatively simply suppressed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a head suspension assembly incorporated in a recording disk drive device such as a hard disk drive device (HDD), and in particular, a head suspension that extends in the front-rear direction and supports the head slider at the front end, and is connected to the head slider. And a flexible printed circuit board extending rearward from the head suspension assembly.

The hard disk drive (HDD) incorporates an actuator block that is mounted on a support shaft that extends in the vertical direction. The actuator block holds an actuator arm extending in the horizontal direction from the support shaft. A head slider is supported at the tip of the actuator arm. When the actuator arm rotates about the spindle, the head slider can be positioned on a desired recording track on the magnetic disk.
JP 2002-269712 A

  A flexible printed circuit board (FPC) extending rearward from the head slider is attached to the actuator arm. Such an FPC extends along a horizontal plane parallel to the surface of the magnetic disk. If an air flow is generated on the surface of the magnetic disk based on the rotation of the magnetic disk, the FPC moves up and down. Such vertical movement causes vibration of the actuator arm. Positioning of the head slider is hindered.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a head suspension assembly and a recording disk drive device that can suppress vibration of an actuator arm relatively easily.

  In order to achieve the above object, according to the first invention, an actuator arm extending in a horizontal direction from a support shaft extending in a vertical direction, a groove formed on the actuator arm and defining inner wall surfaces facing each other, and an actuator And a flexible printed circuit board received in the groove of the arm, and the flexible printed circuit board is provided with an elastic portion for pressing the flexible printed circuit board on an inner wall surface of the groove.

  In such a recording disk drive, the flexible printed circuit board is pressed against the inner wall surface of the groove by the action of the elastic portion. Even if an air flow is generated on the surface of the recording disk based on the rotation of the recording disk, the vertical movement of the flexible printed circuit board can be reliably prevented in the groove. The vibration of the actuator arm can be suppressed relatively easily.

  Such an elastic part should just be formed based on the wave | undulation of a flexible printed circuit board. On the other hand, the elastic part may be formed based on the bending of the flexible printed circuit board. According to such undulation and bending, the flexible printed circuit board can be elastically fitted into the groove. The vertical movement of the flexible printed circuit board can be reliably prevented in the groove. In addition, the flexible printed circuit board is not easily bent in the width direction due to the action of undulation and bending. The rigidity of the flexible printed circuit board can be increased.

  Such a recording disk drive device is mounted on a support shaft to hold an actuator arm, a printed circuit board disposed on the actuator block, an engaged member disposed on the printed circuit board, a flexible An engagement member that is disposed on the printed circuit board and engages with the engaged member may further be provided. In such a recording disk drive device, the engaged member can be engaged with the engaging member relatively easily when the flexible printed circuit board is attached. The flexible printed circuit board and the printed circuit board can be easily positioned.

  On the other hand, the recording disk drive is connected to the actuator block mounted on the support shaft and holding the actuator arm, the printed circuit board disposed on the actuator block, the wiring pattern extending on the printed circuit board, and the wiring pattern. And a conductive engagement member that is connected to the wiring pattern on the flexible printed circuit board and is engaged with the engagement member. In such a recording disk drive, the engaged member can be engaged with the engaging member relatively easily. In attaching the flexible printed circuit board, the flexible printed circuit board and the printed circuit board can be easily positioned. Thus, the electrical connection between the flexible printed circuit board and the printed circuit board can be easily established.

  In assembling the recording disk drive as described above, a flexible print is provided which includes a head suspension extending in the front-rear direction and supporting the head slider at the front end, and a flexible printed circuit board connected to the head slider and extending rearward from the head suspension. A head suspension assembly may be used, which is characterized in that a swell is formed on the substrate. In such a head head suspension assembly, the undulation may be repeated multiple times.

  In such a head suspension assembly, the connecting member may be disposed on the flexible printed board behind the swell. Similarly, the head suspension assembly may include a wiring pattern that is formed on the flexible printed board and extends rearward from the waviness, and a conductive coupling member that is connected to the wiring pattern behind the waviness. Such a connecting member may be formed in a bowl shape, for example.

  According to the second invention, an actuator arm that is rotatably mounted on the support shaft, a groove that is formed on the actuator arm and that defines an inner wall surface facing each other, and a flexible printed circuit board that is received in the groove of the actuator arm And a recording disk drive device comprising an elastic body that presses the flexible printed circuit board against the inner wall surface of the groove.

  In such a recording disk drive device, as described above, the flexible printed circuit board is pressed against the inner wall surface of the groove by the action of the elastic portion. Even if an air flow is generated on the surface of the recording disk based on the rotation of the recording disk, the vertical movement of the flexible printed circuit board can be reliably prevented in the groove. The vibration of the actuator arm can be suppressed relatively easily. Such an elastic body may be made of a resin material, for example.

  According to the third invention, the actuator block mounted on the support shaft extending in the vertical direction, the actuator arm held by the actuator block and extending in the horizontal direction from the support shaft, the groove formed in the actuator arm, and the actuator arm A flexible printed circuit board received in the groove of the actuator, a printed circuit board disposed on the actuator block, an engaged member disposed on the printed circuit board, and an engaged member disposed on the flexible printed circuit board There is provided a recording disk driving device including an engaging member.

  In such a recording disk drive device, the engaged member can be engaged with the engaging member relatively easily when the flexible printed circuit board is attached. The flexible printed circuit board and the printed circuit board can be easily positioned.

  According to the fourth invention, the actuator block mounted on the support shaft extending in the vertical direction, the actuator arm held in the actuator block and extending in the horizontal direction from the support shaft, the groove formed in the actuator arm, and the actuator arm A flexible printed circuit board received in the groove, a printed circuit board disposed on the actuator block, a wiring pattern extending on the printed circuit board, a conductive mating member connected to the wiring pattern, and the flexible printed circuit board. There is provided a recording disk drive device including a conductive engagement member that is connected to a wiring pattern and is engaged with an engaged member.

  In such a recording disk drive device, the engaged member can be engaged with the engaging member relatively easily when the flexible printed circuit board is attached. The flexible printed circuit board and the printed circuit board can be easily positioned. Thus, the electrical connection between the flexible printed circuit board and the printed circuit board can be easily established.

  As described above, according to the present invention, it is possible to provide a head suspension assembly and a recording disk drive device that can suppress vibration of the actuator arm relatively easily.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 schematically shows an internal structure of a hard disk drive (HDD) 11 as a specific example of a recording disk drive. The HDD 11 includes, for example, a box-shaped housing body 12 that partitions a flat rectangular parallelepiped housing space. In the accommodation space, one or more magnetic disks 13 as recording media are accommodated. The magnetic disk 13 is mounted on the rotating shaft 14 of the spindle motor. The spindle motor 14 can rotate the magnetic disk 13 at a high speed such as 7200 rpm, 10000 rpm, or 15000 rpm. A lid body, that is, a cover (not shown) that seals the housing space with the housing body 12 is coupled to the housing body 12.

  The head actuator 15 is further accommodated in the accommodation space. The head actuator 15 includes an actuator block 16. The actuator block 16 is rotatably supported by a support shaft 17 extending in the vertical direction. The head actuator 15 includes a rigid actuator arm 18 extending horizontally from the support shaft 17. The actuator arm 18 is held by the actuator block 16. As is well known, when a plurality of magnetic disks 13 are incorporated into the housing body 12, one actuator arm 18 is disposed between adjacent magnetic disks 13. The actuator block 16 and the actuator arm 18 may be integrally formed from aluminum based on casting, for example.

  A head suspension assembly 19 is attached to the tip of the actuator arm 18. The head suspension assembly 19 includes a head suspension 21 that extends forward from the front end of the actuator arm 18. The head suspension 21 is connected to the front end of the actuator arm 18 in a so-called elastic bending region. A predetermined pressing force acts on the front end of the head suspension 21 toward the surface of the magnetic disk 13 by the action of the elastic bending region. Here, one head suspension assembly 19 is attached to the uppermost actuator arm 18 and the lowermost actuator arm 18. Two head suspension assemblies 19 are attached to an intermediate actuator arm 18 disposed between adjacent magnetic disks 13.

  A flexure 22 is fixed to the front end of the head suspension 21. A flying head slider 23 is fixed to the flexure 22. The flying head slider 23 is received by the flexure 22 so that its posture can be freely changed. Thus, the flying head slider 23 faces the surface of the magnetic disk 13.

  A so-called magnetic head, that is, an electromagnetic transducer (not shown) is mounted on the flying head slider 23. This electromagnetic conversion element is, for example, a read element such as a giant magnetoresistive effect (GMR) element or a tunnel junction magnetoresistive effect (TMR) element that reads information from the magnetic disk 13 by utilizing a resistance change of a spin valve film or a tunnel junction film. And a writing element such as a thin film magnetic head for writing information on the magnetic disk 13 using a magnetic field generated by the thin film coil pattern.

  When an airflow is generated on the surface of the magnetic disk 13 based on the rotation of the magnetic disk 13, positive pressure, that is, buoyancy or negative pressure acts on the flying head slider 23 by the action of the airflow. As the buoyancy and negative pressure balance with the pressing force of the head suspension 21, the flying head slider 23 can continue to fly with relatively high rigidity during the rotation of the magnetic disk 13.

  A power source 24 such as a voice coil motor (VCM) is connected to the actuator block 16. The actuator block 16 can rotate around the support shaft 17 by the action of the power source 24. Based on such rotation of the actuator block 16, the swing of the actuator arm 18 and the head suspension assembly 19 is realized. When the actuator arm 18 swings around the support shaft 17 while the flying head slider 23 is flying, the flying head slider 23 can cross the surface of the magnetic disk 13 in the radial direction. Based on the movement of the flying head slider 23, the electromagnetic conversion element can be positioned with respect to the target recording track.

  As is clear from FIG. 1, a printed circuit board, that is, a flexible printed circuit board (FPC) unit 25 is disposed on the actuator block 16. A head IC (integrated circuit), that is, a preamplifier IC 26 is mounted on the FPC board unit 25. At the time of reading magnetic information, a sense current is supplied from the print amplifier IC 26 toward the reading element. Similarly, when writing magnetic information, a write current is supplied from the preamplifier IC 26 toward the write element. The preamplifier IC 26 on the FPC board unit 25 has a sense current and a write current from a small circuit board 27 arranged in the accommodation space or a printed wiring board (not shown) attached to the back side of the bottom plate of the housing body 12. Is supplied.

  A flexible printed circuit board (FPC) 28 is used to supply the sense current and the write current. The FPC 28 is arranged for each head suspension assembly 19. The FPC 28 includes a thin metal plate such as stainless steel, and an insulating layer, a conductive layer, and a protective layer that are sequentially stacked on the thin metal plate. The conductive layer constitutes a wiring pattern (not shown) extending on the FPC 28. A conductive material such as Cu may be used for the conductive layer. A resin material such as polyimide resin may be used for the insulating layer and the protective layer.

  For example, as shown in FIG. 2, the FPC 28 is fixed to the flexure 23 at one end. The wiring pattern on the FPC 28 is connected to the flying head slider 23. The FPC 28 may be attached to the head suspension 18 based on, for example, an adhesive. The FPC 28 extends rearward along the side surface of the actuator arm 18 from the head suspension 21. The FPC 28 is connected to the FPC board unit 25 at the other end. The wiring pattern is connected to a wiring pattern (not shown) on the FPC board unit 25. Thus, the flying head slider 23 and the FPC board unit 25 are electrically connected.

  FIG. 3 schematically shows the structure of the head suspension assembly 19 according to the first embodiment of the present invention. In the head suspension assembly 19, undulations are formed in the FPC 28. The undulation is repeated a plurality of times, for example. Such FPC 28 is received in a groove 31 formed on the side surface of the actuator arm 18. The undulation of the FPC 28 may be formed at least in the groove 31. The groove 31 defines inner wall surfaces 31 a and 31 b that face each other.

  The FPC 28 contacts the inner wall surface 31a at the plurality of first contact portions 28a based on the above-described swell, and simultaneously contacts the inner wall surface 31b at the plurality of second contact portions 28b. An elastic portion 28c is defined between the first and second contact portions 28a and 28b. The first and second contact portions 28a, 28b are moved away from each other based on the elastic force exerted by the elastic portion 28c. The FPC 28 is pressed against the inner wall surfaces 31a and 31b of the groove 31 by the action of the elastic portion 28c. As apparent from FIG. 3, the FPC 28 protrudes outward from the entrance of the groove 31. However, the FPC 28 may be completely accommodated in the groove 31.

  As shown in FIG. 4, a conductive engagement member 32 is disposed on the FPC board unit 25. Each engaged member 32 is connected to a wiring pattern (not shown) extending on the FPC board unit 25. The engaged member 32 rises from the surface of the FPC board unit 25 in, for example, a bowl shape. The engaged member 32 is bent toward the rear of the actuator arm 18, for example.

  On the other hand, the FPC 28 is provided with a conductive connecting member, that is, an engaging member 33 behind the above-described swell. Each engagement member 33 is connected to the wiring pattern 34 on the FPC 28 behind the undulation. The engaging member 33 rises from the surface of the FPC 28 in, for example, a bowl shape, like the above-described engaged member 32. For example, the engaging member 33 is bent toward the front of the actuator arm 18. In this way, the engaged member 32 is engaged with the engaging member 33. The FPC 28 and the FPC board unit 25 are electrically connected. However, the engaged member 32 and the engaging member 33 may be joined to each other by, for example, a solder material.

  In the HDD 11 as described above, the first and second contact portions 28a and 28b are moved away from each other by the action of the elastic portion 28c. The FPC 28 is elastically fitted into the groove 31. The vertical movement of the FPC 28 in the groove 31 can be reliably prevented. Moreover, the FPC 28 is unlikely to bend in the width direction due to the action of the swell. The rigidity of the FPC 28 can be increased. Even if an air flow is generated on the surface of the magnetic disk 13 based on the rotation of the magnetic disk 13, the vibration of the actuator arm 18 can be suppressed relatively easily. The flying head slider 23, that is, the electromagnetic transducer can be accurately positioned on a predetermined recording track.

  A mold is prepared for forming the FPC 28. For example, a curved surface corresponding to the swell may be formed on the mold. The FPC 28 is sandwiched between molds. The height of the swell may be set slightly larger than the width of the groove 31. Thereafter, the FPC 28 is attached to the head suspension 21. For example, an adhesive may be used for attachment. A wiring pattern extending on the FPC 28 is connected to the flying head slider 23. Thus, the head suspension assembly 19 is manufactured.

  The head suspension assembly 19 is connected to the front end of the actuator arm 18. The FPC 28 is inserted into the groove 31. For insertion, the FPC 28 is stretched behind the actuator arm 18. The amplitude of the swell is reduced. Thus, the FPC 28 can be inserted without contacting the inner wall surfaces 31a, 31b of the groove 31. When the restraining force is released, the amplitude of the swell increases. When the amplitude increases, the FPC 28 contacts the inner wall surfaces 31a and 31b of the groove 31 at the first and second contact portions 28a and 28b. At the same time, the other end of the FPC 28 is pulled forward of the actuator arm 18. At this time, the engaged member 32 is engaged with the engaging member 33. Thus, the electrical connection between the FPC 28 and the FPC board unit 25 can be established simultaneously with the mounting of the FPC 28.

  As described above, the two head suspension assemblies 19 are disposed on the intermediate actuator arm 18. Two FPCs 28, 28 are received in the groove 31. At this time, for example, as shown in FIG. 5, undulations may be formed in the two FPCs 28, 28. For example, the height of the swell may be set slightly larger than the width of the groove 31 as described above. The FPCs 28 and 28 may be inserted into the groove 31 in contact with each other. In such an HDD 11, the first and second contact portions 28a, 28b are moved away from each other based on the elastic force exerted by the elastic portion 28c. The FPCs 28 and 28 are elastically fitted into the grooves 31. In addition, the FPCs 28 and 28 are not easily bent in the width direction due to the action of the undulations. The rigidity of the FPC 28 can be increased. The vertical movement of the FPCs 28 and 28 in the groove 31 can be reliably prevented. The vibration of the actuator arm 18 can be suppressed relatively easily. In addition, since the engaged member 32 can be engaged with the engaging member 33 relatively easily, the electrical connection between the FPC 28 and the FPC board unit 25 can be easily established.

  In addition, as shown in FIG. 6, for example, undulation may be formed only on one FPC 28. The other FPC 28 may be inserted into the groove 31 in the form of a flat plate, for example. One FPC 28 is partitioned with an elastic portion 28c as described above. Based on the elastic force exerted by the elastic portion 28 c, the first and second contact portions 28 a and 28 b are moved away from each other in one FPC 28. One FPC 28 is pressed against the inner wall surface 31 a of the groove 31 and the surface of the other FPC 28 by the action of the elastic portion 28 c. Thus, the other FPC 28 is pressed against the inner wall surface 31 b of the groove 31. In such an HDD 11, one FPC 28 is elastically fitted into the groove 31. Moreover, one FPC 28 is unlikely to bend in the width direction due to the action of the undulation. The rigidity of one FPC 28 can be increased. The vertical movement of the FPCs 28 and 28 in the groove 31 can be reliably prevented. The vibration of the actuator arm 18 can be suppressed relatively easily. In addition, since the engaged member 32 can be engaged with the engaging member 33 relatively easily, the electrical connection between the FPC 28 and the FPC board unit 25 can be easily established.

  FIG. 7 schematically shows the structure of a head suspension assembly 19a according to a second embodiment of the present invention. In the head suspension assembly 19a, the FPC 38 is formed with an elastic portion 38c based on the bending. The bending may be repeated multiple times. At this time, flat surfaces are defined in the first and second contact portions 38a and 38b. Based on the elastic force of the elastic part 38c, the first and second contact parts 38a, 38b are moved away from each other. The FPC 38 is pressed against the inner wall surfaces 31 a and 31 b of the groove 31. The bending of the FPC 38, that is, the height of the step may be set to be slightly larger than the width of the groove 31, for example. In addition, the same reference numerals are assigned to configurations and structures equivalent to those of the above-described embodiment. Thus, the FPC 38 is elastically fitted into the groove 31 as described above. Moreover, the FPC 38 is not easily bent in the width direction due to the action of bending. The rigidity of the FPC 38 can be increased. The vertical movement of the FPC 38 in the groove 31 can be reliably prevented. The vibration of the actuator arm 18 can be avoided relatively easily.

  In addition, when two FPCs 38 and 38 are received in the groove 31, for example, as shown in FIG. 8, only one FPC 38 may be bent. The other FPC 38 may be inserted into the groove 31 in the form of a flat plate, for example. One FPC 38 is partitioned with an elastic portion 38c as described above. Based on the elastic force exerted by the elastic portion 38c, in one FPC 38, the first and second contact portions 38a and 38b are moved away from each other. One FPC 38 is pressed against the inner wall surface 31 a of the groove 31 and the surface of the other FPC 38 by the action of the elastic portion 38 c. The other FPC 38 is pressed against the inner wall surface 31 b of the groove 31. Thus, the FPCs 38 and 38 are elastically fitted into the grooves 31. The vertical movement of the FPCs 38 and 38 in the groove 31 can be reliably prevented. The vibration of the actuator arm 18 can be suppressed relatively easily.

  In addition, for example, as shown in FIG. 9, the two FPCs 38 and 38 may be bent. At this time, the second contact portions 38b may be overlapped with each other. Similarly to the above, the first and second contact portions 38a, 38b are moved away from each other in the FPCs 38, 38 based on the elastic force exerted by the elastic portion 38c. One FPC 38 is pressed against the inner wall surface 31 a of the groove 31, and at the same time, the other FPC 38 is pressed against the inner wall surface 31 b of the groove 31. Thus, the FPCs 38 and 38 are elastically fitted into the grooves 31. The vertical movement of the FPCs 38 and 38 in the groove 31 can be reliably prevented. The vibration of the actuator arm 18 can be suppressed relatively easily.

  In such a head suspension assembly 19a, a conductive pad 39 is arranged on the FPC board unit 25 as shown in FIG. The conductive pads 39 are connected to a wiring pattern (not shown) extending on the FPC board unit 25. A wiring pattern (not shown) extending on the FPC 38 may be bonded to the conductive pad 39 based on, for example, a solder material 41. As described above, the FPC 38 is pressed against the inner wall surfaces 31 a and 31 b of the groove 31. The FPC 38 is elastically fitted into the groove 31. Movement of the FPC 38 in the groove 31 is prevented. Therefore, the wiring pattern of the FPC 38 can be easily positioned on the conductive pad 39 of the FPC board unit 25. However, the engaged member and the engaging member may be arranged in the FPC 38 and the FPC board unit 25 as in the above-described embodiment.

  FIG. 11 schematically shows the structure of a head suspension assembly 19b according to a third embodiment of the present invention. In the head suspension assembly 19b, the FPC 48 is formed in a flat plate shape. One FPC 48 is received in the groove 31 in the upper and lower actuator arms 18. For example, in the upper actuator arm 18, the elastic body 49 is received between the inner wall surface 31 a of the groove 31 and the FPC 48. In the intermediate actuator arm 18, two FPCs 48 and 48 are received in the groove 31. In the intermediate actuator arm 18, the elastic body 49 is received between the FPCs 48. In addition, the same reference numerals are assigned to configurations and structures equivalent to those of the above-described embodiment.

  For example, a material such as polyimide resin or VEM (viscoelastic material) can be used for the elastic body 49. The elastic body 49 may be fixed to the FPC 48 based on an adhesive, for example. However, the elastic body 49 may be inserted into the groove 31 after the FPC 48 is inserted. The height of the elastic body 49 may be set slightly larger than the width of the groove 31. The elastic body 49 may be received over the entire length of the groove 31 or may be received in a part of the groove 31. The elastic body 49 may be accommodated in the groove 31 as shown in FIG.

  In such an HDD 11, the elastic body 49 can be elastically sandwiched in the groove 31. The FPC 48 is pressed against the inner wall surfaces 31 a and 31 b of the groove 31 based on the elastic force exerted by the elastic body 49. Thus, the vertical movement of the FPC 48 in the groove 31 can be reliably prevented. The vibration of the actuator arm 18 can be suppressed relatively easily. In addition, the wiring pattern extending on the FPC 48 can be easily positioned on the conductive pad 39 of the FPC board unit 48. However, the above-described engaged member and the engaging member may be disposed on the FPC 48 and the FPC board unit 25.

  (Appendix 1) An actuator arm extending in a horizontal direction from a support shaft extending in a vertical direction, a groove formed on the actuator arm and defining inner wall surfaces facing each other, and a flexible printed circuit board received in the groove of the actuator arm And a flexible printed circuit board having an elastic portion for pressing the flexible printed circuit board against an inner wall surface of the groove.

  (Additional remark 2) The recording disk drive apparatus of Additional remark 1 WHEREIN: The said elastic part is formed based on the wave | undulation of a flexible printed circuit board, The recording disk drive apparatus characterized by the above-mentioned.

  (Additional remark 3) The recording disk drive apparatus of Additional remark 1 WHEREIN: The said elastic part is formed based on the bending of a flexible printed circuit board, The recording disk drive apparatus characterized by the above-mentioned.

  (Supplementary note 4) In the recording disk drive device according to any one of supplementary notes 1 to 3, an actuator block mounted on the support shaft and holding the actuator arm, a printed circuit board disposed on the actuator block, and a print A recording disk drive device further comprising an engaged member disposed on a substrate and an engaging member disposed on the flexible printed board and engaged with the engaged member.

  (Supplementary Note 5) In the recording disk drive device according to any one of Supplementary Notes 1 to 3, an actuator block mounted on the support shaft and holding the actuator arm, a printed circuit board disposed on the actuator block, and a print A wiring pattern extending on the substrate; a conductive engagement member connected to the wiring pattern; and a conductive engagement member connected to the wiring pattern on the flexible printed circuit board and engaged with the engagement member. A recording disk drive device further comprising:

  (Appendix 6) An actuator arm rotatably mounted on a support shaft, a groove formed on the actuator arm and defining inner wall surfaces facing each other, a flexible printed circuit board received in the groove of the actuator arm, A recording disk drive comprising: an elastic body that presses a flexible printed circuit board against an inner wall surface.

  (Additional remark 7) The recording disk drive apparatus of Additional remark 6 WHEREIN: The said elastic body is comprised from a resin material, The recording disk drive apparatus characterized by the above-mentioned.

  (Appendix 8) An actuator block mounted on a support shaft extending in the vertical direction, an actuator arm held in the actuator block and extending horizontally from the support shaft, a groove formed in the actuator arm, and a groove of the actuator arm Accepted flexible printed circuit board, printed circuit board disposed on actuator block, engaged member disposed on printed circuit board, and engaged member disposed on flexible printed circuit board and engaged with engaged member A recording disk drive comprising:

  (Supplementary Note 9) An actuator block mounted on a support shaft extending in the vertical direction, an actuator arm held in the actuator block and extending horizontally from the support shaft, a groove formed in the actuator arm, and a groove of the actuator arm Acceptable flexible printed circuit board, printed circuit board disposed on actuator block, wiring pattern extending on the printed circuit board, conductive mating member connected to the wiring pattern, and wiring pattern on the flexible printed circuit board A recording disk drive device comprising: a conductive engagement member connected to and engaged with an engaged member.

  (Supplementary Note 10) A head suspension that extends in the front-rear direction and supports the head slider at the front end, and a flexible printed circuit board that is connected to the head slider and extends rearward from the head suspension. A head suspension assembly.

  (Supplementary note 11) The head suspension assembly according to supplementary note 10, wherein the swell is repeated a plurality of times.

  (Additional remark 12) The head suspension assembly according to Additional remark 10 or 11, wherein the flexible printed circuit board is provided with a connecting member behind the waviness.

  (Supplementary note 13) In the head suspension assembly according to supplementary note 10 or 11, a wiring pattern formed on the flexible printed circuit board and extending rearward from the swell, and a conductive connected to the wiring pattern behind the swell. A head suspension assembly.

  (Supplementary note 14) The head suspension assembly according to Supplementary note 12 or 13, wherein the connecting member is formed in a bowl shape.

1 is a plan view schematically showing an internal structure of a specific example of a recording medium driving device, that is, a hard disk driving device (HDD). It is a rear view which shows roughly the structure of a head actuator. FIG. 3 is an enlarged partial sectional view taken along line 3-3 in FIG. 2, schematically showing the structure of the head suspension assembly according to the first embodiment of the present invention. It is an expanded partial sectional view of a head actuator which shows roughly engagement of an engaging member and an engaged member. FIG. 5 is a view schematically showing a modification of the head suspension assembly according to the first embodiment corresponding to FIG. 3. FIG. 10 is a view schematically showing another modification of the head suspension assembly according to the first embodiment, corresponding to FIG. 3. It is a figure corresponding to Drawing 3 and showing roughly the structure of the head suspension assembly concerning a 2nd embodiment of the present invention. It is a figure corresponding to Drawing 3 and showing roughly a modification of a head suspension assembly concerning a 2nd embodiment. It is a figure corresponding to Drawing 3 and showing roughly other modifications of a head suspension assembly concerning a 2nd embodiment. FIG. 6 is an enlarged partial plan view schematically showing a structure of a head suspension assembly according to a second embodiment. FIG. 6 is an enlarged partial plan view schematically showing the structure of a head suspension assembly according to a third embodiment of the present invention. FIG. 12 is an enlarged partial cross-sectional view taken along line 12-12 of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 Hard disk drive (HDD) as a recording medium drive, 16 Actuator block, 17 Support shaft, 18 Actuator arm, 25 Printed circuit board, 28 Flexible printed circuit board (FPC), 28c Elastic part, 31 Groove, 31a, 31b Inner wall surface 32 Engagement member, 33 Engagement member (connection member), 34 Wiring pattern, 49 Elastic body.

Claims (5)

  An actuator arm that extends in the horizontal direction from a support shaft that extends in the vertical direction, a groove that is formed in the actuator arm and that defines inner wall surfaces that face each other, and a flexible printed circuit board that is received in the groove of the actuator arm. A recording disk drive device, wherein an elastic portion for pressing a flexible printed circuit board is defined on an inner wall surface of a groove on the substrate.   The recording disk drive apparatus according to claim 1, wherein the elastic portion is formed based on waviness of a flexible printed circuit board.   Actuator arm rotatably mounted on the support shaft, groove formed on the actuator arm and defining inner wall surfaces facing each other, flexible printed circuit board received in the groove of the actuator arm, and flexible on the inner wall surface of the groove A recording disk drive device comprising: an elastic body that presses a printed circuit board.   Actuator block mounted on a support shaft extending in the vertical direction, an actuator arm held in the actuator block and extending horizontally from the support shaft, a groove formed in the actuator arm, and a flexible print received in the groove of the actuator arm A recording medium comprising: a substrate; a printed circuit board disposed on the actuator block; an engagement member disposed on the printed circuit board; and an engagement member disposed on the flexible printed circuit board and engaged with the engagement member. Disk drive device.   A head suspension that extends in the front-rear direction and supports the head slider at the front end, and a flexible printed circuit board that is connected to the head slider and extends rearward from the head suspension, wherein the flexible printed circuit board has a swell. Head suspension assembly.

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