Disk drive suspension

Abstract

A suspension (10A) according to an embodiment includes a first actuator (AC1) including piezoelectric elements (30R, 30L), a second actuator (AC2) including a piezoelectric element (40R), and a third actuator (AC3) including a piezoelectric element (40L). A first conductor (33) supplies a first alternating current to the first actuator (AC1). A second conductor (41) supplies a second alternating current to the second actuator (AC2). A third conductor (42) supplies a third alternating current having a phase opposite to that of the second alternating current to the third actuator (AC3). The first conductor (33) includes a first adjacent portion (45) and a second adjacent portion (46). The first adjacent portion (45) extends longitudinally along the second conductor (41) with the wiring unit (21). The second adjacent portion (46) extends longitudinally along the third conductor (42) with the wiring unit (21).

Description

Technical Field

[0001] The present invention relates to a disk drive suspension comprising a plurality of actuators, such as piezoelectric elements. Background Technology

[0002] A hard disk drive (HDD) is used in information processing devices. Hereinafter referred to as a disk drive, the disk drive includes a disk that rotates about a spindle, a carriage that rotates about a pivot, and so on. A disk drive suspension is mounted on an arm of the carriage. Hereinafter referred to simply as a suspension.

[0003] The suspension includes a base plate, a load beam, and a flexural member arranged along the load beam. A slider is disposed on a gimbal portion formed near the distal end of the flexural member. Elements for performing access (e.g., reading or writing data recorded on a disk) are disposed on the slider.

[0004] To increase the recording density of a hard disk, it is necessary to position the read / write head relative to the recording surface of the disk more quickly and accurately. To this end, suspensions equipped with coarse and fine actuators have been developed. Piezoelectric elements that operate in response to voltage are known fine actuators.

[0005] The suspension disclosed in JP2013-246840A (Patent Document 1) has an actuator mounted near the suspension base plate. The suspension disclosed in JP2014-22015A (Patent Document 2) has a fine-motion actuator mounted on the universal joint. Suspensions including both coarse-motion and fine-motion actuators are also known.

[0006] A multi-stage actuator type suspension, comprising an actuator disposed at a first position and an actuator disposed at a second position, is also known. For example, a suspension comprising a first actuator disposed at a first position in the longitudinal direction of the suspension, and a second and a third actuator disposed at a second position of the suspension, is also known. The first position is, for example, located near the suspension base plate. The second position is, for example, located near the distal end of the suspension.

[0007] An alternating current for driving is applied to the first actuator through the first conductor of the wiring unit. Alternating currents with opposite phases are applied to the second and third actuators through the second and third conductors of the wiring unit, respectively. The second and third actuators are arranged in pairs. Therefore, the second and third conductors are also arranged in pairs. Thus, in a conventional wiring unit, the second and third conductors are typically located on one side of the first conductor and are adjacent to each other.

[0008] To ensure proper suspension function, it is necessary to accurately understand its vibration characteristics. Therefore, the inventors conducted an experiment to measure the vibration characteristics of the suspension. In the experiment, the suspension itself was made to vibrate by providing vibration signals to the second and third actuators, respectively.

[0009] Depending on the disk drive specifications, a first suspension facing a first side of a single disk and a second suspension facing a second side of the disk may be provided. The first suspension is configured such that the air bearing surface of the slider faces the first side (e.g., the surface) of the disk. The second suspension is configured such that the air bearing surface of the slider faces the second side (e.g., the back side) of the disk. The first and second suspensions have mirror-symmetrical shapes in a manner that clamps the disk.

[0010] Therefore, in vibration tests, if the vibration signals supplied to the first suspension and the second suspension are the same, then the vibration waveforms of the first suspension and the second suspension should be the same. However, during in-depth research, the inventors discovered that there are inconsistencies between the vibration waveforms of the first suspension and the second suspension.

[0011] The inventors conducted an in-depth study into the reasons why the vibration waveforms of the first and second suspensions differ from each other. For example, when vibration signals are supplied to the second and third conductors of the wiring unit, crosstalk is detected in the first conductor on the non-excitation side. The inventors have realized that this phenomenon is caused by the difference in vibration waveforms between the first and second suspensions. Since crosstalk can affect the operation of the actuator, it is necessary to suppress it. Summary of the Invention

[0012] The purpose of this invention is to provide a disk drive suspension that includes multiple actuators and is capable of suppressing crosstalk occurring in the wiring unit.

[0013] One embodiment is a disc drive suspension, which includes a first actuator disposed at a first position, a second actuator and a third actuator disposed at a second position, and a wiring unit. The wiring unit includes a first conductor, a second conductor, and a third conductor. The first conductor is electrically connected to the first actuator and supplies a first alternating current to the first actuator. The second conductor is electrically connected to the second actuator and supplies a second alternating current to the second actuator. The third conductor is electrically connected to the third actuator and supplies a third alternating current with a phase opposite to the second alternating current to the third actuator. The first conductor includes a first adjacent portion and a second adjacent portion. The first adjacent portion is disposed closer to the second conductor than the third conductor and extends along the second conductor in the longitudinal direction of the wiring unit. The second adjacent portion is disposed closer to the third conductor than the second conductor and extends along the third conductor in the longitudinal direction of the wiring unit.

[0014] Similar to Figure 5In the illustrated embodiment, the first conductor may be disposed between the second conductor and the third conductor. The first conductor includes a first adjacent portion extending longitudinally along the second conductor in the wiring unit and a second adjacent portion extending longitudinally along the third conductor in the wiring unit.

[0015] Similar to Figure 8 In the illustrated embodiment, the second conductor and the third conductor may be arranged adjacent to each other. The first conductor has a first energized portion and a second energized portion. The first energized portion is disposed outside the second conductor and extends longitudinally along the second conductor via the wiring unit. The first energized portion includes the first adjacent portion. The second energized portion is disposed outside the third conductor and extends longitudinally along the third conductor via the wiring unit. The second energized portion includes the second adjacent portion. The first energized portion and the second energized portion may be connected to each other via a jumper conductor.

[0016] Similar to Figure 9 In the illustrated embodiment, the first conductor may be disposed between the second conductor and the third conductor. The first conductor has a first energized portion and a second energized portion. The first energized portion extends longitudinally along the second conductor through the wiring unit and includes the first adjacent portion. The second energized portion extends longitudinally along the third conductor through the wiring unit and includes the second adjacent portion.

[0017] Similar to Figure 10 In the illustrated embodiment, the first conductor may have a first energized portion and a second energized portion. In this case, the first energized portion is disposed outside the second conductor and extends longitudinally along the second conductor using the wiring unit. The first energized portion includes the first adjacent portion. Furthermore, the second energized portion is disposed between the second conductor and the third conductor and extends longitudinally along the third conductor using the wiring unit. The second energized portion includes the second adjacent portion. The first energized portion and the second energized portion can be connected to each other via a jumper conductor.

[0018] According to one embodiment, crosstalk occurring within a wiring unit can be suppressed in a disk drive suspension that includes a plurality of actuators and wiring units that supply drive signals to these actuators.

[0019] Other objects and advantages of the present invention will be set forth in the following description, some of which may be obvious from the description or may be learned by practicing the invention. The objects and advantages of the present invention may be realized and obtained by means and combinations particularly pointed out below. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the general description given above and the detailed description of embodiments given below, serve to explain the principles of the invention.

[0021] Figure 1This is a 3D view showing an example of a disk drive.

[0022] Figure 2 This is a schematic cross-sectional view of the disk drive.

[0023] Figure 3 This is a plan view illustrating a first suspension example of the first embodiment.

[0024] Figure 4 It is shown schematically. Figure 3 The diagram shows the plan view of the first suspension.

[0025] Figure 5 This is a schematic plan view showing a portion of the wiring unit of the first suspension.

[0026] Figure 6 It is a graph showing the relationship between the drive signal and crosstalk voltage of the first suspension.

[0027] Figure 7 This is a schematic plan view illustrating the second suspension of the first embodiment.

[0028] Figure 8 This is a plan view schematically showing a portion of the wiring unit of the second embodiment.

[0029] Figure 9 This is a plan view schematically showing a portion of the wiring unit of the third embodiment.

[0030] Figure 10 This is a plan view schematically showing a portion of the wiring unit of the fourth embodiment. Detailed Implementation

[0031] [First Embodiment]

[0032] The following will refer to Figures 1 to 7 The first suspension 10A and the second suspension 10B of the first embodiment are described.

[0033] Figure 1 This is a perspective view showing an example of a hard disk drive (HDD). This hard disk drive will be referred to as a disk drive below. Figure 2 This is a schematic cross-sectional view of the disk drive 1. The disk drive 1 includes a housing 2, a disk 4 that rotates about a spindle 3, a bracket 6, a positioning motor 7, etc. The bracket 6 rotates about a pivot 5. The motor 7 causes the bracket 6 to rotate. The housing 2 is sealed by a cover (not shown).

[0034] like Figure 2As shown, the first suspension 10A is mounted on the first surface of each arm 6a of the bracket 6. The second suspension 10B is mounted on the second surface of each arm 6a (i.e., the surface opposite to the first surface). The first suspension 10A and the second suspension 10B are opposite to each other in a manner that clamps the disk 4.

[0035] Figure 3 This is a plan view showing an example of the first suspension 10A. Figure 4 This is a schematic plan view of the first suspension 10A. The first suspension 10A includes a base plate 11, a load beam 12, a flexure member 13, an actuator mounting portion 14 disposed in a first position, and an actuator mounting portion 15 disposed in a second position.

[0036] As described herein, the first position refers to a location near the base plate 11 in the longitudinal direction of the suspension 10A. The second position is located near the distal end of the suspension 10A. The base plate 11 and the load beam 12 are formed of, for example, stainless steel sheet. A circular boss 16 is formed in the base plate 11. This boss 16 is fixed to the arm 6a of the bracket 6 (e.g., ...). Figure 2 (As shown).

[0037] The flexural element 13 includes a metal substrate 20 and a wiring unit 21. Figure 5 This is a schematic plan view showing a portion of the wiring unit 21. Figure 4 and Figure 5 In the diagram, the double arrow Y indicates the longitudinal direction of the wiring unit 21. The metal substrate 20 is formed of a stainless steel plate that is thinner than the load beam 12. The wiring unit 21 is disposed along the metal substrate 20.

[0038] A swingable gimbal portion 25 is formed near the distal end of the flexure 13. A slider 26, which serves as a magnetic head, is mounted on the gimbal portion 25. Elements for magnetically recording data on the disk 4 and elements for reading data recorded on the disk 4 are provided on the slider 26.

[0039] A pair of piezoelectric elements 30R and 30L are disposed as a first actuator AC1 on the actuator mounting portion 14 at a first position. Each piezoelectric element 30R and 30L is made of lead zirconate titanate (PZT) or the like. The piezoelectric elements 30R and 30L have the same structure, but are disposed in the actuator mounting portion 14 with opposite polarities (positive and negative).

[0040] exist Figure 3 and Figure 4 In the wiring unit 21, the first conductor 33 is connected to one electrode of the right-side piezoelectric element 30R via a terminal 31. The other electrode of the piezoelectric element 30R is electrically connected to a metal portion (e.g., substrate 11) that constitutes the grounding side circuit of the first suspension 10A.

[0041] exist Figure 3 and Figure 4In the circuit, the first conductor 33 is connected to one electrode of the left-side piezoelectric element 30L via terminal 32. The other electrode of the piezoelectric element 30L is electrically connected to the metal portion constituting the grounding side circuit of the first suspension 10A. A first alternating current flows through terminal 33a of the first conductor 33 (e.g., ...). Figure 4 (As shown) is supplied to these piezoelectric elements 30R and 30L.

[0042] When a first alternating current is supplied to piezoelectric elements 30R and 30L, the piezoelectric elements 30R and 30L extend and retract in opposite directions. As a result, the distal end of the first suspension 10A can move slightly in the swing direction. Figure 3 (The direction indicated by the double arrow A1). For example, when the piezoelectric element 30R retracts and the piezoelectric element 30L extends, the distal end of the first suspension 10A moves along a first direction. When the piezoelectric element 30R extends and the piezoelectric element 30L retracts, the distal end of the first suspension 10A moves along a second direction. As described herein, "movement of the distal end of the suspension" means that the position of the element (read / write element) located at the slider 26 moves along either the first or second direction.

[0043] The piezoelectric element 40R, serving as the second actuator AC2, and the piezoelectric element 40L, serving as the third actuator AC3, are disposed on the actuator mounting portion 15 at the second position. The piezoelectric elements 40R and 40L are made of PZT or the like.

[0044] exist Figure 3 and Figure 4 In the wiring unit 21, the second conductor 41 is connected to one electrode of the right-side piezoelectric element 40R. The other electrode of the piezoelectric element 40R is electrically connected to the ground side circuit of the first suspension 10A. The second conductor 41 is connected via a terminal portion 41a (such as...). Figure 4 (As shown) A second alternating current is supplied to the piezoelectric element 40R. For ease of description, the second conductor 41 is... Figure 4 and Figure 5 The middle section is represented by cross-sectional lines.

[0045] exist Figure 3 and Figure 4 In the wiring unit 21, the third conductor 42 is connected to one electrode of the left piezoelectric element 40L. The other electrode of the piezoelectric element 40L is electrically connected to the grounding side circuit of the first suspension 10A. The third conductor 42 is connected via a terminal portion 42a (such as...). Figure 4 As shown, a third alternating current is supplied to the piezoelectric element 40L. The phase of this third alternating current is opposite to the phase of the second alternating current. In other words, there is a 180° phase difference. For ease of description, the third conductor 42... Figure 4 and Figure 5 The pattern is represented by sand dots. The longitudinal direction Y of the wiring unit 21 is also the longitudinal direction of conductors 33, 41 and 42.

[0046] When a second alternating current is supplied to the second conductor 41 and a third alternating current is supplied to the third conductor 42, the piezoelectric elements 40R and 40L extend and retract. As a result, the distal end of the first suspension 10A can move slightly in the swing direction. Figure 3 (The direction indicated by the double arrow A1).

[0047] For example, when piezoelectric element 40R retracts and piezoelectric element 40L extends, the distal end of the first suspension 10A (i.e., the position of the element (read / write element) disposed on slider 26) moves in a first direction. When piezoelectric element 40R extends and piezoelectric element 40L retracts, the distal end of the first suspension 10A moves in a second direction. The strokes of piezoelectric elements 40R and 40L are less than the strokes of piezoelectric elements 30R and 30L at the first position.

[0048] like Figure 4 and Figure 5 As shown, a first conductor 33 is disposed between a second conductor 41 and a third conductor 42. An insulating portion 35 for electrical insulation is formed between the first conductor 33 and the second conductor 41. An insulating portion 36 for electrical insulation is formed between the first conductor 33 and the third conductor 42.

[0049] The first conductor 33 includes a first adjacent portion 45 and a second adjacent portion 46. The first adjacent portion 45 is located closer to the second conductor 41 than the third conductor 42 and is disposed adjacent to the second conductor 41. The first adjacent portion 45 extends along the second conductor 41 in the longitudinal direction of the wiring unit 21.

[0050] The second adjacent portion 46 is located closer to the third conductor 42 than the second conductor 41 and is disposed adjacent to the third conductor 42. The second adjacent portion 46 extends along the third conductor 42 in the longitudinal direction of the wiring unit 21. When the piezoelectric elements 40R and 40L are operated, alternating currents with opposite phases are supplied to the second conductor 41 and the third conductor 42.

[0051] The inventors are concerned with crosstalk generated in the first conductor 33 when driving signals are supplied to the second conductor 41 and the third conductor 42. Using an oscilloscope 47 (e.g., Figure 4 (As shown) Detect the crosstalk. For example... Figure 4 As shown, the first connection CH1 of the oscilloscope 47 is connected to the third conductor 42, and the second connection CH2 is connected to the first conductor 33. GND refers to ground (ground signal).

[0052] A first alternating current is supplied from signal source E1 to the second conductor 41, and a second alternating current is supplied from signal source E2 to the third conductor 42. The first and second alternating currents are sinusoidal waves with an amplitude of 8V and a frequency of 1kHz, respectively, and have a 180° phase difference. Crosstalk generated in the first conductor 33 is detected by oscilloscope 47.

[0053] Figure 6 The relationship between the drive signals V1 and V2 supplied to piezoelectric elements 40R and 40L and the crosstalk voltage V3 is shown. Figure 6 As shown, the first alternating current (drive signal V1) and the second alternating current (drive signal V2) are out of phase, and their phases are offset by 180°. Therefore, since the leakage currents of drive signals V1 and V2 cancel each other out when they act on the first conductor 33, crosstalk is suppressed.

[0054] like Figure 6 As shown, a small crosstalk voltage V3 is observed on the first conductor 33, but its level is not a problem in practical use. In contrast, in a conventional wiring unit, a relatively large crosstalk voltage V4 is observed on the first conductor due to the leakage current of a conductor adjacent to the first conductor (e.g., the second conductor).

[0055] To effectively suppress crosstalk, the lengths of the first adjacent portion 45 and the second adjacent portion 46 should preferably be equal. However, in practice, if a certain level of crosstalk is acceptable, the lengths of the first adjacent portion 45 and the second adjacent portion 46 can be different. To suppress crosstalk to a level that is practically problem-free, for example, when the length of the first adjacent portion 45 is set to 1, the length of the second adjacent portion 46 is 0.5 or more and 1.5 or less. More preferably, when the length of the first adjacent portion 45 is set to 1, the length of the second adjacent portion 46 can be 0.8 or more and 1.2 or less.

[0056] Figure 7 The second suspension 10B is schematically shown. This second suspension 10B is configured relative to the first suspension 10A to clamp the disk 4 (e.g., Figure 2 The first suspension 10A and the second suspension 10B are mirror-symmetric in the manner shown. The construction of the first suspension 10A and the second suspension 10B is substantially equivalent. Therefore, the second suspension 10B will be briefly described.

[0057] Figure 7 The second suspension 10B shown includes a base plate 51, a load beam 52, an actuator mounting portion 54 disposed at a first position, an actuator mounting portion 55 disposed at a second position, and a wiring unit 61. A boss portion 56 is fixed to the arm 6a of the bracket 6 (e.g., Figure 2 (As shown). A swingable gimbal portion 65 is formed near the distal end of the second suspension 10B. A slider 66 is mounted on the gimbal portion 65.

[0058] Piezoelectric elements 70R and 70L, serving as the first actuator AC1, are disposed on the actuator mounting portion 54 at the first position. Figure 7 In the circuit, the first conductor 73 is connected to one electrode of the right-side piezoelectric element 70R via terminal 71 of the wiring unit 61. The other electrode of the piezoelectric element 70R is electrically connected to the metal portion constituting the grounding side circuit of the second suspension 10B.

[0059] exist Figure 7 In the circuit, the first conductor 73 is connected to one electrode of the left piezoelectric element 70L via terminal 72 of the wiring unit 61. The other electrode of the piezoelectric element 70L is electrically connected to the metal portion constituting the grounding side circuit of the second suspension 10B.

[0060] Piezoelectric elements 70R and 70L have the same structure, but are arranged in the actuator mounting portion 54 with opposite polarities, similar to piezoelectric elements 30R and 30L in the first embodiment (e.g. Figure 3 and Figure 4 (As shown). The first conductor 73 is connected to these piezoelectric elements 70R and 70L.

[0061] The piezoelectric element 80R, serving as the second actuator AC2, and the piezoelectric element 80L, serving as the third actuator AC3, are disposed on the actuator mounting portion 55 at the second position. Figure 7 In the middle, the second conductor 81 is connected to the right-side piezoelectric element 80R. Figure 7 In the middle, the third conductor 82 is connected to the left piezoelectric element 80L.

[0062] The first conductor 73 is disposed between the second conductor 81 and the third conductor 82. The first conductor 73 includes a first adjacent portion 45 and a second adjacent portion 46, similar to the first conductor 33 in the first embodiment (e.g., Figure 4 and Figure 5 (As shown). The first adjacent portion 45 extends along the second conductor 81 in the longitudinal direction of the wiring unit 61. The second adjacent portion 46 extends along the third conductor 82 in the longitudinal direction of the wiring unit 21.

[0063] When piezoelectric elements 80R and 80L are operated, alternating currents with opposite phases are supplied as driving signals to the second conductor 81 and the third conductor 82. By applying these opposite-phase alternating currents to the first conductor 73, crosstalk generated in the first conductor 73 can be suppressed.

[0064] [Second Embodiment] Figure 8 )

[0065] Figure 8This is a schematic plan view of the wiring unit 21A according to the second embodiment. The components other than the wiring unit 21A are the same as those described in the first embodiment of the suspension. The wiring unit 21A in this embodiment also includes a first adjacent portion 45 and a second adjacent portion 46. The first adjacent portion 45 of the wiring unit 21A is located closer to the second conductor 41 than the third conductor 42. The first adjacent portion 45 extends along the second conductor 41 in the longitudinal direction of the wiring unit 21A (indicated by a double arrow Y). The second adjacent portion 46 is located closer to the third conductor 42 than the second conductor 41 and extends along the third conductor 42 in the longitudinal direction of the wiring unit 21A.

[0066] like Figure 8 As shown, the second conductor 41 and the third conductor 42 are arranged adjacent to each other. An insulating portion 100 for electrical insulation is formed between the second conductor 41 and the third conductor 42. The first conductor 33 has a first energized portion 101 and a second energized portion 102 in the longitudinal direction (indicated by the double arrow Y) of the wiring unit 21A. The first energized portion 101 is disposed outside the second conductor 41 and extends along the second conductor 41 in the longitudinal direction of the wiring unit 21A. The first energized portion 101 includes a first adjacent portion 45.

[0067] The second conductive portion 102 is disposed outside the third conductor 42 and extends longitudinally along the third conductor 42 in the direction of the wiring unit 21A. The second conductive portion 102 includes a second adjacent portion 46. The first conductive portion 101 and the second conductive portion 102 are connected to each other by a bridging conductor 103. An insulating portion 104 is formed between the second conductor 41 and the first conductive portion 101. An insulating portion 105 is formed between the third conductor 42 and the second conductive portion 102.

[0068] [Third Embodiment] Figure 9 )

[0069] Figure 9 This is a schematic plan view of the wiring unit 21B according to the third embodiment. The components other than the wiring unit 21B are the same as those described in the first embodiment of the suspension. The wiring unit 21B in this embodiment also includes a first adjacent portion 45 and a second adjacent portion 46. The first adjacent portion 45 is located closer to the second conductor 41 than the third conductor 42. The first adjacent portion 45 extends along the second conductor 41 in the longitudinal direction of the wiring unit 21B (indicated by a double arrow Y). The second adjacent portion 46 is located closer to the third conductor 42 than the second conductor 41. The second adjacent portion 46 extends along the third conductor 42 in the longitudinal direction of the wiring unit 21B.

[0070] like Figure 9As shown, a first conductor 33 is positioned between a second conductor 41 and a third conductor 42. The first conductor 33 includes a first energized portion 101, a second energized portion 102, and a connecting portion 110. The first energized portion 101 extends along the second conductor 41 in the longitudinal direction of the wiring unit 21B. The first energized portion 101 includes a first adjacent portion 45. The second energized portion 102 extends along the third conductor 42 in the longitudinal direction of the wiring unit 21B. The second energized portion 102 includes a second adjacent portion 46. An insulating portion 111 is formed between the first conductor 33 and the second conductor 41. An insulating portion 112 is formed between the first conductor 33 and the third conductor 42.

[0071] [Fourth Embodiment] Figure 10 )

[0072] Figure 10 This is a schematic plan view of the wiring unit 21C according to the fourth embodiment. The components other than the wiring unit 21C are the same as those described in the first embodiment of the suspension. The wiring unit 21C in this embodiment also includes a first adjacent portion 45 and a second adjacent portion 46. The first adjacent portion 45 is located closer to the second conductor 41 than the third conductor 42. The first adjacent portion 45 extends along the second conductor 41 in the longitudinal direction of the wiring unit 21C (indicated by a double arrow Y). The second adjacent portion 46 is located closer to the third conductor 42 than the second conductor 41. The second adjacent portion 46 extends along the third conductor 42 in the longitudinal direction of the wiring unit 21C.

[0073] like Figure 10 As shown, the first conductor 33 includes a first energized portion 101, a second energized portion 102, and a bridging conductor 103. The first energized portion 101 is disposed outside the second conductor 41 and extends along the second conductor 41 in the longitudinal direction of the wiring unit 21C. The first energized portion 101 includes a first adjacent portion 45. The second energized portion 102 is disposed between the second conductor 41 and the third conductor 42. The second energized portion 102 extends along the third conductor 42 in the longitudinal direction of the wiring unit 21C and is parallel to it. The second energized portion 102 includes a second adjacent portion 46.

[0074] The first energized part 101 and the second energized part 102 are connected to each other via a bridging conductor 103. An insulating part 120 is formed between the second conductor 41 and the first energized part 101. An insulating part 121 is formed between the third conductor 42 and the second energized part 102. An insulating part 122 is formed between the second conductor 41 and the third conductor 42.

[0075] It goes without saying that, in implementing this invention, the specific form of the various components constituting the suspension can be modified in various ways. The wiring unit can also be implemented in various configurations as needed. An actuator mounted on the suspension is, for example, a piezoelectric element, but can also be any component driven by an electrical signal.

[0076] Other advantages and modifications will be readily apparent to those skilled in the art. Therefore, the invention is not limited in its broader aspects to the specific details and representative embodiments shown and described herein. Thus, various modifications can be made without departing from the spirit or scope of the overall inventive concept as defined by the appended claims and their equivalents.

Claims

1. A disk drive suspension, comprising: The first actuator (AC1) is located in the first position; The second actuator (AC2) and the third actuator (AC3) are located in the second position; as well as Wiring units (21)(21A)(21B)(21C), The wiring unit (21)(21A)(21B)(21C) includes: A first conductor (33)(73) electrically connected to the first actuator (AC1) and supplying a first alternating current to the first actuator (AC1); The second conductor (41) and (81) are electrically connected to the second actuator (AC2) and supply the second alternating current to the second actuator (AC2); and A third conductor (42) (82) is electrically connected to the third actuator (AC3) and supplies the third actuator (AC3) with a third alternating current that is opposite in phase to the second alternating current. Its features The first conductor (33)(73) includes: A first adjacent portion (45) is disposed closer to the second conductor (41)(81) than the third conductor (42)(82), and extends longitudinally along the second conductor (41)(81) in the direction of the wiring unit (21)(21A)(21B)(21C); and The second adjacent portion (46) is located closer to the third conductor (42)(82) than the second conductor (41)(81) and extends along the longitudinal direction of the wiring unit (21)(21A)(21B)(21C) with respect to the third conductor (42)(82).

2. The disk drive suspension as described in claim 1, characterized in that, The first conductor (33) is disposed between the second conductor (41) and the third conductor (42), and the first conductor (33) includes: The first adjacent portion (45) extending longitudinally along the second conductor (41) of the wiring unit (21); and The second adjacent portion (46) extends longitudinally along the third conductor (42) of the wiring unit (21).

3. The disk drive suspension as described in claim 1, characterized in that, The second conductor (41) and the third conductor (42) are arranged adjacent to each other, and The first conductor (33) has: A first energized portion (101) is disposed outside the second conductor (41), extending longitudinally along the second conductor (41) with the wiring unit (21A) and including the first adjacent portion (45); and The second energized portion (102) is disposed outside the third conductor (42), extends longitudinally along the third conductor (42) along the wiring unit (21A), and includes the second adjacent portion (46).

4. The disk drive suspension as described in claim 1, characterized in that, The first conductor (33) is disposed between the second conductor (41) and the third conductor (42), and the first conductor (33) has: A first energized portion (101) extends longitudinally along the wiring unit (21B) and parallel to the second conductor (41), and includes the first adjacent portion (45); and The second energized portion (102) extends longitudinally along the third conductor (42) with respect to the wiring unit (21B) and includes the second adjacent portion (46).

5. The disk drive suspension as described in claim 1, characterized in that: The first conductor (33) has: A first energized portion (101) is disposed outside the second conductor (41), extending longitudinally along the second conductor (41) with the wiring unit (21C) and including the first adjacent portion (45); and The second energized portion (102) is disposed between the second conductor (41) and the third conductor (42), extends longitudinally along the third conductor (42) with the wiring unit (21C), and includes the second adjacent portion (46).

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