Magnetic disk device flexible parts

Abstract

A flexible member (15) includes a metal base (40), a base insulating layer (41) formed on the metal base (40), a terminal (61) formed on the base insulating layer (41), a conductor portion (45a) electrically conductive with the terminal (61), and a detour extension portion (70) formed on the conductor portion (45a). The conductor portion (45a) includes a conductor (42a) and a covering layer (43a) covering the conductor (42a). A conductive adhesive (50) is provided to the terminal (61). The detour extension portion (70) is formed in the longitudinal middle of the conductor portion (45a) and extends from a side surface (80) of the conductor portion (45a) along the base insulating layer (41) in a direction intersecting the length of the conductor portion (45a).

Description

Technical Field

[0001] The present invention relates to a magnetic disk device used in an information processing device, and more particularly to a wiring portion of a flexible member of the magnetic disk device. Background Art

[0002] In some cases, an actuator made of a piezoelectric element is mounted on the flexure of a suspension used in a magnetic disk device. JP 2020-135906 A (Patent Document 1) describes an example of a flexure having an actuator. In order to fix the actuator to the universal joint portion of the flexure, a conductive adhesive can be used. The conductive adhesive contains a conductive material, such as silver particles. The conductive adhesive has the function of fixing the actuator to the terminal of the universal joint portion and the function of electrically connecting the actuator to the wiring portion.

[0003] Before curing, liquid conductive adhesive is fluid. Therefore, some of the conductive adhesive may flow from the terminals to the wiring portion. The wiring portion of the flexure includes a parallel conductor section, which comprises multiple conductor sections. This parallel conductor section includes a narrow gap between each pair of adjacent conductor sections. The gap extends along the length of the conductor section.

[0004] Conductive glue is supplied to the terminals of the actuator mounting section. There have been cases where liquid conductive glue supplied to the terminals has migrated through the conductors to locations outside the terminals. For example, in the aforementioned parallel conductor section, a narrow gap exists between adjacent pairs of conductors. Due to this structure, there is concern that the conductive glue could be carried to distant locations by capillary action.

[0005] Conductive adhesive contains conductive material, such as silver particles. Conductive material that migrates along the conductive portion may adhere to unexpected locations. In addition, the conductive material (conductive particles) that adhere to unexpected locations may fall off from the wiring portion for some reason. Conductive material that falls off from the wiring portion may cause the circuit of the magnetic disk device to malfunction or cause the magnetic disk device to crash. Therefore, it is necessary to prevent the liquid conductive adhesive from moving through the wiring portion.

[0006] JP 2019-046517 A (Patent Document 2) discloses a flexible member including a wall portion to prevent the migration of liquid conductive adhesive. The wall portion prevents the conductive adhesive from migrating toward the component to be protected (e.g., a reference hole). The liquid conductive adhesive is supplied to the terminal of the actuator mounting portion. The wall portion forms an island-shaped protrusion between the terminal and the component to be protected. Note that the height of the wall portion is greater than the height of the terminal.

[0007] The wall prevents liquid conductive adhesive from flowing toward the component to be protected. However, conventional walls have island-shaped protrusions that are independent of the wiring section. This wall structure can prevent liquid conductive adhesive from flowing out of the terminals before the component to be protected. However, conventional walls cannot prevent conductive adhesive supplied to the terminals from migrating through the wiring section.

[0008] An object of the present invention is to provide a flexure for a magnetic disk device that can prevent liquid conductive paste supplied to a terminal from migrating to a location other than the terminal through a wiring portion. Summary of the Invention

[0009] According to one embodiment, a flexible member for a magnetic disk device is provided, comprising a metal base, a base insulating layer, a terminal, a conductive portion electrically conductive to the terminal, and a detour extending portion. The base insulating layer is formed on the metal base. The conductive portion includes a conductor formed on the base insulating layer and a covering layer covering the conductor. Conductive adhesive is applied to the terminal. The detour extending portion is formed longitudinally in the middle of the conductive portion.

[0010] The detour extending portion extends from the side surface of the conductor portion along the base insulating layer in a direction intersecting the longitudinal direction of the conductor portion. The detour extending portion is integrally formed with the conductor portion and is continuous with the side surface of the conductor portion.

[0011] According to the flexible member of the embodiment, the meandering extension portion prevents the liquid conductive paste supplied to the terminal from migrating along the conductive portion to a position outside the terminal.

[0012] This embodiment may include a conductor parallel section. The conductor parallel section includes a conductor section electrically conductive with the terminal and a plurality of other conductor sections arranged parallel to one another. A gap is formed between each pair of adjacent conductor sections in the conductor parallel section. The gap extends along the length of the conductor section. A circuitous extension section may be provided between the conductor parallel section and the terminal.

[0013] The height of the detour extension from the base insulating layer may be equal to the height of the conductor portion from the base insulating layer. One of the two side surfaces of the conductor portion that is electrically conductive with the terminal may be continuous with the gap in the parallel conductor portion. In this case, the detour extension may extend from one side surface of the conductor portion in a direction intersecting the longitudinal direction of the conductor portion.

[0014] like Figure 4 In the example shown, the winding extension portion may extend from one side of the conductor portion in a direction perpendicular to the length direction of the conductor portion. Figure 8 In the example shown, the winding extension portion may include a neck portion and a wide portion. The neck portion is continuous with the side surface of the conductor portion. The wide portion is continuous with the neck portion and has a width greater than that of the neck portion. Figure 9 In the example shown, the meandering extension may include a neck portion and a plurality of fork-shaped protrusions, wherein the neck portion is continuous with the side surface of the conductor portion and the fork-shaped protrusions are continuous with the neck portion.

[0015] like Figure 10 In the example shown, the winding extension portion may include a neck portion and a plurality of protrusions. The neck portion is continuous with the side surface of the conductor portion. The protrusion portion is continuous with the neck portion and extends in a direction opposite to the terminal. Figure 11In the example shown, the winding extension portion may have a spiral convex portion. The spiral convex portion is continuous with the side surface of the conductor portion. Figure 12 In the example shown, the portion may include a first meandering extension portion and a second meandering extension portion. The first meandering extension portion is continuous with one side surface of the conductor portion, the conductor portion being electrically conductive to the terminal. The second meandering extension portion is continuous with the other side surface of the conductor portion.

[0016] The following description will set forth other objects and advantages of the present invention, and some of these other objects and advantages will become apparent from the following description, or may be learned by practicing the present invention. The objects and advantages of the present invention are realized and obtained by the means and combinations particularly pointed out below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the summary given above and the detailed description given below, serve to explain the principles of the invention.

[0018] Figure 1 It is a perspective view showing an example of a magnetic disk device.

[0019] Figure 2 is a plan view showing an example of a suspension used for a magnetic disk device.

[0020] Figure 3 is a partial plan view showing the flexure according to the first embodiment.

[0021] Figure 4 yes Figure 3 An enlarged partial plan view of the flexible member shown.

[0022] Figure 5 It means along Figure 4 A cross-sectional view of the wiring portion taken along line VV in FIG.

[0023] Figure 6 It is along Figure 4 A cross-sectional view of the wiring portion taken along line VI-VI in FIG.

[0024] Figure 7 It is along Figure 4 A cross-sectional view of the wiring portion taken along line VII-VII in FIG.

[0025] Figure 8 is a partial plan view of a flexure according to a second embodiment.

[0026] Figure 9 is a partial plan view of a flexure according to a third embodiment.

[0027] Figure 10 is a partial plan view of a flexure according to a fourth embodiment.

[0028] Figure 11 is a partial plan view of a flexure according to a fifth embodiment.

[0029] Figure 12 is a partial plan view of a flexure according to a sixth embodiment. DETAILED DESCRIPTION

[0030] [First embodiment]

[0031] The following will refer to Figures 1 to 7 A flexure of a magnetic disk device according to a first embodiment will be described.

[0032] Figure 1 is a perspective view showing a hard disk drive as an example of a magnetic disk device. Figure 1 The magnetic disk device 1 shown includes a housing 2, a magnetic disk 4 that rotates around a spindle 3, a carriage 6 that pivots around a pivot 5, a voice coil motor 7 that drives the carriage 6, a controller 8, and the like.

[0033] An arm 10 is provided on the carriage 6. A magnetic disk device suspension (hereinafter referred to as the "suspension") 11 is mounted on the front end of the arm 10. A slider 12, which constitutes the magnetic head, is mounted on the distal end of the suspension 11. As the magnetic disk 4 rotates, an air bearing is formed between the magnetic disk 4 and the slider 12. As the carriage 6 pivots via the voice coil motor 7, the slider 12 moves to a desired track on the magnetic disk 4.

[0034] Figure 2 FIG1 shows a plan view of an example of a suspension 11. The suspension 11 includes a base plate 13, a load beam 14, and a flexure 15. The base plate 13 is fixed to the arm 10 (eg, Figure 1 shown). Figure 2 The direction indicated by the double-headed arrow X in represents the length direction of the suspension 11. In this specification, the direction indicated by the arrow X1 may be referred to as the front of the suspension 11, and the direction indicated by the arrow X2 may be referred to as the rear of the suspension 11.

[0035] The flexible member 15 is provided along the load beam 14. The flexible member 15 includes a tail portion 16 extending behind the suspension 11. A gimbal portion 17 is provided near the distal end of the flexible member 15. The slider 12 is provided on the gimbal portion 17.

[0036] Figure 3The distal end of the flexure 15 is shown. The gimbal portion 17 of the flexure 15 includes a swingable tongue 20. The slider 12 is attached to the tongue 20. The slider 12 serves as a magnetic head for accessing the magnetic disk 4, for example, to write and read data from the magnetic disk 4. The end of the slider 12 is provided with multiple elements 21, such as MR elements. The elements 21 convert magnetic signals into electrical signals. The suspension 11 and slider 12 constitute a head gimbal assembly. The slider 12 includes a connection terminal 22 connected to the wiring portion 30 of the flexure 15.

[0037] like Figure 3 As shown, a first actuator mounting portion 31 and a second actuator mounting portion 32 are provided on the universal joint portion 17. A first actuator 33 is provided on the first actuator mounting portion 31. The first actuator 33 is located near one side surface 12a of the slider 12. A second actuator 34 is provided on the second actuator mounting portion 32. The second actuator 34 is located near the other side surface 12b of the slider 12.

[0038] The first actuator 33 and the second actuator 34 each include a piezoelectric element. The piezoelectric element is made of a piezoelectric material such as lead zirconate titanate (PZT). When a voltage is applied to the piezoelectric element, the first actuator 33 and the second actuator 34 are deformed. Due to this deformation, the slider 12 moves in the swing direction (by the Figure 3 The double-headed arrow Y in the figure indicates movement.

[0039] Figure 3 The universal joint portion 17 of the flexible member 15 shown in the figure is roughly bilaterally symmetrical with the center line Z1 as the axis of symmetry. The center line Z1 extends along the length direction of the flexible member 15. For example, the shapes of the left and right sides of the universal joint portion 17 can be slightly different, and the number of wires on the left and right sides can be different. The wiring portion 30 includes a first wiring portion 30a and a second wiring portion 30b. The first wiring portion 30a is arranged along one side surface 12a of the slider 12. The second wiring portion 30b is arranged along the other side surface 12b of the slider 12. This article mainly describes the first wiring portion 30a. The structure of the second wiring portion 30b is roughly the same as that of the first wiring portion 30a.

[0040] Figure 4 yes Figure 3 FIG. 1 is a partially enlarged plan view of the wiring portion 30 of the flexible member 15 . Figure 5 It is along Figure 4 A partial cross-sectional view of the wiring portion 30 taken along line VV in FIG. Figure 5 As shown, the wiring portion 30 includes a metal base 40, a base insulating layer 41, a plurality of conductors 42, and a cover layer 43 covering the conductors 42. The metal base 40 is formed from a thin stainless steel plate. The base insulating layer 41 is formed on the metal base 40. The conductors 42 are arranged along the base insulating layer 41. The metal base 40 forms the main body of the flexure 15 and is elastically deformable in the thickness direction.

[0041] Conductor 42 is made of a low-resistance metal, such as copper. Base insulating layer 41 and cover layer 43 are each made of an electrically insulating resin, such as polyimide. Base insulating layer 41 has a thickness of, for example, 5 to 20 μm. Conductor 42 has a thickness of, for example, 4 to 16 μm. Cover layer 43 has a thickness of, for example, 2 to 10 μm. Conductor 42 and cover layer 43 constitute conductor portion 45.

[0042] like Figure 4 and 5 As shown, the wiring portion 30 includes a parallel conductor portion 30X. The parallel conductor portion 30X includes a plurality of conductor portions 45 arranged parallel to one another. The parallel conductor portion 30X includes gaps 46. A gap 46 is formed between each pair of adjacent conductor portions 45. The gaps 46 extend along the length of the conductor portions 45. When liquid conductive adhesive 50 enters the gaps 46, it migrates by capillary action. The liquid conductive adhesive 50 that enters the gaps 46 may migrate to unexpected locations along the gaps 46.

[0043] The conductive adhesive 50 contains a conductive material (conductive particles) such as silver particles. The conductive particles contained in the conductive adhesive 50 may migrate through the conductive portion 45. The migrated conductive particles may detach from the wiring portion 30 for some reason. Conductive particles detached from the wiring portion 30 may cause the magnetic disk device to malfunction. Therefore, in this embodiment, the first wiring portion 30a and the second wiring portion 30b are provided with circuitous extension portions 70 and 71. The circuitous extension portions 70 and 71 can suppress the migration of the conductive adhesive 50. The circuitous extension portions 70 and 71 will be described in detail later.

[0044] like Figure 3 As shown, the first actuator mounting portion 31 includes a first terminal 61 and a second terminal 62 formed thereon. One end of the first actuator 33 is fixed to the first terminal 61 via a conductive adhesive 50. The first terminal 61 is electrically conductive with the first conductive portion 45a. The other end of the first actuator 33 is fixed to the second terminal 62 via a conductive adhesive 50. The second terminal 62 is electrically conductive with the second conductor portion 45b.

[0045] The second actuator mounting portion 32 includes a third terminal 63 and a fourth terminal 64 formed therein. One end of the second actuator 34 is secured to the third terminal 63 via conductive adhesive 50. The third terminal 63 is electrically conductive with the third conductor 45 c. The other end of the second actuator 34 is secured to the fourth terminal 64 via conductive adhesive 50. The fourth terminal 64 is electrically conductive with the fourth conductor portion 45 d.

[0046] The first actuator mounting portion 31 and the second actuator mounting portion 32 are substantially bilaterally symmetrical about the imaginary center line Z1. The actuator mounting portions 31 and 32 have substantially the same structure. Therefore, the following description will use the first actuator mounting portion 31 as a representative.

[0047] like Figure 4 As shown in FIG. 1 , a detour extending portion 70 is formed in the first conductor portion 45 a. The first conductor portion 45 a forms a portion of the wiring portion 30. The detour extending portion 70 is formed near the first terminal 61. Figure 4 A double-headed arrow L1 shown in FIG. 4 indicates the length direction of the first conductor portion 45 a , and a double-headed arrow L2 indicates the width direction of the first conductor portion 45 a . Figure 6 It is along Figure 4 A partial cross-sectional view of the wiring portion 30 taken along line VI-VI in FIG. Figure 7 It is along Figure 4 A partial cross-sectional view of the wiring portion 30 taken along line VII-VII in FIG.

[0048] A detour extension portion 70 is formed between the first terminal 61 and the conductor parallel portion 30X. The detour extension portion 70 is formed in the longitudinal center of the first conductor portion 45a. The detour extension portion 70 protrudes in the width direction of the first conductor portion 45a as a cape. The detour extension portion 70 extends in a direction intersecting the longitudinal direction of the first conductor portion 45a. For example, the detour extension portion 70 extends in a direction perpendicular to the longitudinal direction of the first conductor portion 45a.

[0049] The detour extension portion 70 is formed integrally with the first conductor 45a. The detour extension portion 70 includes a conductor 42a made of copper and a covering layer 43a covering the conductor 42a.

[0050] Conductor 42a of detour extension 70 is made of copper, the same material used to form conductor 42 of first conductor portion 45a. Detour extension 70 is integrally formed with first conductor portion 45a at the same time as first conductor portion 45a is formed. Therefore, no special manufacturing process is required to form detour extension 70.

[0051] like Figure 6 As shown, the height of the detour extending portion 70 (the height from the base insulating layer 41) is H1. The height of the first conductor portion 45a (the height from the base insulating layer 41) is H2. H1 and H2 are equal to each other. The detour extending portion 70 is formed integrally with the first conductor portion 45a. The detour extending portion 70 is continuous with the first conductor portion 45a in the width direction of the first conductor portion 45a.

[0052] Liquid conductive adhesive 50 (such as Figure 3 The portion of the liquid conductive adhesive 50 supplied to the terminal 61 may be supplied along Figure 4 The liquid conductive adhesive 50 does not flow out immediately after the conductive adhesive 50 is applied. However, when the actuators 33 and 34 are installed, the liquid conductive adhesive 50 may overflow and flow out. For example, Figure 6As shown by the two-dot chain line 50 a in FIG. 5 , it is considered that the conductive adhesive 50 may adhere to the corner formed by the side surface 80 of the first conductive portion 45 a and the base insulating layer 41 .

[0053] The conductive paste (indicated by the double-dashed line 50a) adhered to the corner (the corner formed by the side surface 80 and the base insulating layer 41) can be extended along the Figure 4 However, the conductive adhesive 50 flowing in the direction of the first arrow A1 is blocked by the winding extension 70. Therefore, the conductive adhesive 50 flows around the winding extension 70 as shown by the second arrow A2 (as shown in FIG. Figure 4 As shown in FIG. 3 , the conductive adhesive 50 has a longer migration path due to the meandering extension 70 . Therefore, it is possible to suppress the conductive adhesive 50 from reaching the conductor parallel portion 30X.

[0054] If the conductive paste supplied to the terminal 61 is supplied in the direction of the third arrow A3 ( Figure 4 If the conductive adhesive 50 flows through the conductor parallel portion 30X, the conductive adhesive may migrate toward the conductor parallel portion 30X. However, the side surface 81 of the conductor parallel portion 30X does not include the gap 46. Therefore, the conductive adhesive 50 can be prevented from flowing through the conductor parallel portion 30X by capillary action.

[0055] The description provided above is for the detour extension portion 70 formed in the first wiring portion 30a. The detour extension portion 71 provided in the second wiring portion 30b is the same as the detour extension portion 70 provided in the first wiring portion 30a, so the description of the other extension portion 71 is omitted.

[0056] [Second to Sixth Embodiments]

[0057] Will refer to Figures 8 to 12 The flexures 15A to 15E of the second to sixth embodiments are described. In the flexures 15A-15E, the same components as those of the flexure in the first embodiment are denoted by common reference numerals, and description of these same components is omitted.

[0058] Figure 8 1 is a partial plan view of a flexible member 15A according to the second embodiment. The wiring portion 30 of the flexible member 15A includes a detour extension portion 70A having a greater detour distance than the detour extension portion 70 of the first embodiment. The detour extension portion 70A includes a neck portion 90 and a wide portion 91. The neck portion 90 is continuous with the side surface 80 of the first conductor portion 45a. The wide portion 91 is continuous with the neck portion 90. The width W1 of the wide portion 91 is greater than the width of the neck portion 90. The length L3 of the wide portion 91 is greater than the length of the neck portion 90. Figure 8 As shown by the dotted arrow in FIG. 8 , the conductive adhesive flowing out from the terminal 61 meanders around the wide portion 91 .

[0059] Figure 9FIG. 1 is a partial plan view of a flexible member 15B according to a third embodiment. The winding extension portion 70B of the flexible member 15B includes a neck portion 90 and a plurality of fork-shaped protrusions 100 to further increase the winding distance of the conductive adhesive. The neck portion 90 is continuous with the side surface 80 of the first conductor portion 45a. The fork-shaped protrusions 100 are continuous with the neck portion 90. Figure 9 As shown by the dotted arrows in FIG. 8 , the conductive paste flowing out of the terminal 61 meanders around the plurality of protrusions 100 .

[0060] Figure 10 1 is a partial plan view showing a flexible member 15C of the fourth embodiment. The winding extension portion 70C of the flexible member 15C includes a neck portion 90 and a plurality of protrusions 110. The neck portion 90 is continuous with the side surface 80 of the first conductor portion 45a. The plurality of protrusions 110 are continuous with the neck portion 90. In addition, the protrusions 110 extend in a direction opposite to the terminal 61. Figure 10 As shown by the dotted arrow in FIG. 8 , the conductive paste flowing out from the terminal 61 meanders around the protrusion 110 opposite to the terminal 61 .

[0061] Figure 11 FIG. 1 is a partial plan view of a flexible member 15D according to the fifth embodiment. The extension portion 70D of the flexible member 15D includes a spiral protrusion 120 to further increase the winding distance. The spiral protrusion 120 is continuous with the side surface 80 of the first conductor portion 45a. Figure 11 As shown by the dotted arrow, most of the conductive adhesive flowing out of the terminal 61 meanders along the spiral protrusion 120 .

[0062] Figure 12 FIG. 1 is a partial plan view showing a flexible member 15E of the sixth embodiment. The flexible member 15E includes a first detour extending portion 70 and a second detour extending portion 70E. The first detour extending portion 70 is different from the detour extending portion 70 ( Figure 3-Figure 7 ), and is also continuous with one side surface 80 of the conductor portion 45a. The second winding extension portion 70E is continuous with the other side surface 82 of the conductor 45a.

[0063] Figure 12The flexible member 15E shown in FIG. 1 includes a first detour extension 70 and a second detour extension 70E. One side 80 of the conductor portion 45a is continuous with the first detour extension 70. The other side 82 of the conductor portion 45a is continuous with the side 81 of the conductor parallel portion 30X via the second detour extension 70E. This structure prevents conductive adhesive adhered to the other side 82 of the conductor portion 45a from migrating to the side 81 of the conductor parallel portion 30X through capillary action. However, depending on the specifications of the suspension, the conductor portion 45a may be placed between other wiring sections. Even in this case, the second detour extension 70E can prevent conductive adhesive from migrating. For example, conductive adhesive adhered to the other side 82 of the conductor portion 45a can prevent conductive adhesive from migrating through the conductor portion 45a to other wiring sections separated from the terminal 61. In other words, it is effective to provide the first detour extension 70 on one side 80 of the conductor portion 45a and the second detour extension 70E on the other side 82 of the conductor portion 45a.

[0064] When implementing the present invention, the specific structures of the metal base, wiring portion, terminals, and the like that constitute the flexure can naturally be varied in various ways. Embodiments of the present invention can also be applied to suspensions that do not have an actuator mounting portion. Embodiments of the present invention can also be applied to terminals to which conductive adhesive is supplied and wiring portions that include conductors connected to the terminals.

[0065] Additional advantages and modifications will readily occur to those skilled in the art. Therefore, in its broadest sense, the present invention is not limited to the specific details and representative embodiments shown and described herein. Therefore, various modifications may 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 flexible member for a magnetic disk device, characterized in that: include: a metal substrate (40); a base insulating layer (41) formed on the metal base (40); a conductor portion (45a) comprising a conductor (42a) formed on the base insulating layer (41) and a covering layer (43a) covering the conductor (42a), wherein the conductor portion (45a) includes a side surface (80); a gap (46) formed between a pair of adjacent conductor portions (45a); a terminal (61) electrically conductive with the conductor (42a) of the conductor portion (45a), liquid conductive glue (50) being supplied to the terminal (61); and A circuitous extension portion (70, 70A, 70B, 70C, 70D) is formed in the middle of the longitudinal direction of the conductor portion (45a), extends from the side surface (80) along the base insulating layer (41) along the width direction of the conductor portion (45a), is continuous with the side surface (80) of the conductor portion (45a), and inhibits the liquid conductive glue (50) supplied to the terminal (61) from moving along the conductor portion (45a) toward the gap (46).

2. The flexible member according to claim 1, wherein: Also includes: a conductor parallel portion (30X), wherein the conductor portion (45a) electrically conductive with the terminal (61) and other conductor portions (45) are arranged in parallel with each other in the conductor parallel portion (30X); The gap (46) is formed between each pair of adjacent conductor portions of the conductor parallel portion (30X) and extends along the conductor portion in the length direction of the conductor portion. in The winding extension portion is formed between the conductor parallel portion (30X) and the terminal (61).

3. The flexible member according to claim 1, wherein: A height (H1) of the winding extension portion from the base insulating layer (41) is equal to a height (H2) of the conductor portion (45a) from the base insulating layer (41).

4. The flexible member according to claim 2, wherein: One of the side surface (80) and the other side surface (82) of the conductor portion (45a) electrically conductive to the terminal (61) is continuous with the gap (46) of the conductor parallel portion (30X), and the winding extension portion (70) extends from the side surface (80) of the conductor portion (45a) in a direction intersecting with the length (L1) of the conductor portion (45a).

5. The flexible member according to claim 4, wherein: The winding extension portion extends from a side surface (80) of the conductor portion (45a) along a direction perpendicular to the length (L1) of the conductor portion (45a).

6. The flexible member according to claim 1, wherein: The winding extension portion comprises a neck portion (90) connected to a side surface (80) of the conductor portion (45a) and a wide portion (91) connected to the neck portion (90), wherein the width of the wide portion (91) is greater than the width of the neck portion (90).

7. The flexible member according to claim 1, wherein: The winding extension portion includes a neck portion (90) continuous with the one side surface (80) of the conductor portion (45a) and a plurality of fork-shaped protrusions (100) continuous with the neck portion (90).

8. The flexible member according to claim 1, wherein: The winding extension portion includes a neck portion (90) connected to a side surface (80) of the conductor portion (45a); and a plurality of protrusions (110) continuous with the neck portion (90) and extending in a direction opposite to the terminal (61).

9. The flexible member according to claim 1, wherein: The winding extension portion includes a spiral convex portion (120), and the spiral convex portion (120) is continuous with a side surface (80) of the conductor portion (45a).

10. The flexible member according to claim 4, wherein: include The circuitous extension portion is continuous with one side surface (80) of the conductor portion (45a), the conductor portion (45a) is electrically conductive with the terminal (61), and a second circuitous extension portion (70E) extends from the other side surface (82) of the conductor portion (45a) in a direction intersecting the length of the conductor portion (45a).

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