Flexible conductors and electrical equipment

Abstract

A flexible conductor having a small electrical resistance is provided by having a plurality of copper foils stacked in the thickness direction, and at both ends of the copper foils in the elongation direction, the plurality of stacked copper foils are ultrasonically contacted with each other. Additionally, an electrical device is provided having the flexible conductor, a movable part connected to the first end and a terminal connected to the second end among the first end and the second end of the flexible conductor.

Description

Technology Field

[0001] The present disclosure relates to an ultrasonically bonded flexible conductor and an electrical device comprising said flexible conductor. Background Technology

[0002] In the prior art, a flexible conductor is disclosed having a flexible portion having conductivity and flexibility formed by laminating a plurality of copper thin plates and terminal portions provided at both ends of the flexible portion. In manufacturing the flexible conductor, tin plating is applied to the thin plates, and the tin plating is melted by resistance welding or the like to join the laminated thin plates together (e.g., Patent Document 1). Prior art literature

[0003] Patent Document 1: Japanese Published Patent Application No. 2013-131434 The problem to be solved

[0004] However, in the conventional method of joining copper foils by melting tin plating, since the plating layer is placed between the copper foils, when current is applied, current flows through the tin plating layer, which has a higher electrical resistance value than copper, and there was a problem that the electrical resistance value increased compared to the flexible conductor of copper foil without tin plating.

[0005] The present disclosure is made to solve the above-mentioned problems and aims to provide a flexible conductor in which a plurality of copper foils are ultrasonically bonded, and an electrical device equipped with said flexible conductor. means of solving the problem

[0006] A flexible conductor according to the present disclosure comprises a plurality of copper foils stacked in the thickness direction, and at both ends of the copper foils in the elongation direction, the plurality of stacked copper foils are ultrasonically bonded to each other.

[0007] In addition, the electric device according to the present disclosure comprises the above-mentioned flexible conductor, a movable part connected to the first end and the second end of the flexible conductor, and a terminal connected to the second end. Effects of the invention

[0008] According to the flexible conductor of the present disclosure, compared to a flexible conductor in which copper foils stacked in the past are bonded by tin plating, a flexible conductor having a low electrical resistance value when current is applied can be provided. In addition, according to the electrical device of the present disclosure, an electrical device having a low electrical resistance value can be provided. Brief explanation of the drawing

[0009] FIG. 1 is a schematic side view showing a state in which a switch including a flexible conductor according to Embodiment 1 of the present disclosure is in an open state. FIG. 2 is a schematic side view showing a closed state of a switch including a flexible conductor according to Embodiment 1 of the present disclosure. FIG. 3 is a perspective view of a flexible conductor according to Embodiment 1 of the present disclosure. FIG. 4 is a perspective view of a flexible conductor according to embodiment 2 of the present disclosure. FIG. 5 is a perspective view of a flexible conductor according to embodiment 3 of the present disclosure. FIG. 6 is a schematic diagram corresponding to a cross-section of a flexible conductor according to embodiment 3 of the present disclosure, viewed in the direction of the arrow along the line A-A′ of FIG. 5. Specific details for implementing the invention

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Furthermore, the drawings are schematically illustrated, and the interrelationships of sizes and positions shown in different drawings are not necessarily accurately described and may be appropriately modified. Additionally, in the following description, identical components are illustrated using the same reference numerals, and their names and functions are also considered identical or similar. Accordingly, detailed descriptions of these may be omitted.

[0011] Embodiment 1.

[0012] The flexible conductor (1) in Embodiment 1 will be explained using FIGS. 1, 2, and 3. FIG. 1 is a schematic side view showing the state in which the switch (11) including the flexible conductor (1) of Embodiment 1 is open, that is, the state in which the movable contact (4) and the fixed contact (5) described later are not in contact. In addition, FIG. 1 shows the interior of the vacuum valve (16) by omitting a part of the front surface of the vacuum valve (16) for convenience of explanation.

[0013] As shown in FIG. 1, the switch (11) according to the present embodiment comprises a flexible conductor (1), a first terminal (12) (a fixed terminal on the flexible conductor side that is electrically connected to a movable contact (4) through the flexible conductor (1)), a driving device tip (13), a first movable part (14) (a movable part connected to the movable contact (4)), a vacuum valve (16), a fixed part (17) (a movable part connected to a fixed contact (5)), a second terminal (19) (a fixed terminal on the vacuum valve side that is electrically connected to the fixed contact (5)), a bolt (20) and a nut (23) that fix the first terminal (12) and the flexible conductor (1), a bolt (21) that fixes the fixed part (17) and the second terminal (19), and a nut (22) that fixes the first movable part (14), the flexible conductor (1) and the driving device tip (13). The switch (11) includes a fixed contact (5) and a fixed part (17) as fixed members, and a movable contact (4) and a first movable part (14) as movable parts.

[0014] A flexible conductor (1) includes a flexible portion (38) having conductivity and flexibility, a first end portion (32), and a second end portion (33). The first end portion (32) and the second end portion (33) are positioned to be sandwiched between both ends of the flexible portion (38). Here, the first end portion (32) and the second end portion (33) may be parts of one end or the other end of the flexible portion (38). That is, the first end portion (32) and the second end portion (33) of the flexible conductor (1) are not limited to edge portions, etc., and may be parts excluding the flexible portion (38). For example, if the flexible portion (38) is not at the center of the flexible conductor (1) but at a position off from the center, one end portion may be at the center of the flexible conductor (1).

[0015] The first end (32) of the flexible conductor (1) is connected to the driving device tip (13) and the first movable part (14) by, for example, a nut (22). That is, the first end (32) of the flexible conductor (1) is connected to the movable part of the switch (11). That is, the first end (32) of the flexible conductor (1) is electrically connected to the first movable part (14).

[0016] Additionally, the first end (32) of the flexible conductor (1) may be connected to the first movable part (14) and may not be connected to the driving device tip (13).

[0017] The driving device tip (13) and the first movable part (14) are connected by a nut (22).

[0018] Additionally, the driving device tip (13) is connected to an external driving device not shown. The driving device is driven, for example, by the force of a spring. Additionally, the driving device includes an insulating rod connected to the first movable part (14).

[0019] The second end (33) of the flexible conductor (1) is connected to the first terminal (12) by, for example, a bolt (20) and a nut (23). That is, the second end (33) of the flexible conductor (1) of the switch (11) is connected to the fixed part of the switch (11). In addition, the second end (33) of the flexible conductor (1) is electrically connected to the first terminal (12).

[0020] In addition, the first end (32) and the second end (33) coupled to the driving device tip (13), the first movable part (14), and the first terminal (12) as counterpart members do not refer only to the outer circumference or end of the flexible conductor (1), and the part coupled to the counterpart member may be located on the central side rather than the outer circumference of the flexible conductor (1).

[0021] The fixed part (17) and the second terminal (19) are fastened together by a bolt (21). Additionally, the fixed part (17) and the second terminal (19) are electrically connected.

[0022] FIG. 2 is a schematic side view showing a state in which a switch (11) including a flexible conductor (1) of Embodiment 1 is closed, that is, a state in which a movable contact (4) and a fixed contact (5) are in contact. In FIG. 2, for convenience of explanation, a part of the front of the vacuum valve (16) is omitted to show the interior of the vacuum valve (16). In FIG. 2, the same reference numerals as in FIG. 1 indicate the same configuration, so the description is omitted.

[0023] As shown in FIG. 2, the movable contact (4) and the fixed contact (5) inside the vacuum valve (16) are in contact. That is, the circuit of the switch (11) is in a closed state.

[0024] Power moving in the direction of the arrow shown in FIG. 2 is transmitted to the driving device tip (13) by the driving device. By transmitting power to the driving device tip (13), power is transmitted to the first movable part (14) connected to the driving device tip (13).

[0025] As power is transmitted from the driving device tip (13) to the first movable part (14), the movable contact (4) moves in a direction that approaches the fixed contact (5). As the movable contact (4) moves, the movable contact (4) and the fixed contact (5) come into contact, and the open switch (11) shown in FIG. 1 transitions to the closed switch (11) shown in FIG. 2.

[0026] The flexible conductor (1) follows the movement of the first movable part (14) when the switch (11) transitions from an open state to a closed state and when it transitions from a closed state to an open state.

[0027] In addition, the switch (11) to which the flexible conductor (1) of the present invention is applied is not limited to a circuit breaker that uses a vacuum valve, but may also be other electrical devices such as a disconnector in which a fixed part and a movable part are electrically connected. The flexible conductor (1) can be easily used for other electrical devices and switch (11) with a configuration different from that of the switch (11) of the present embodiment.

[0028] FIG. 3 is a perspective view of a flexible conductor (1) according to embodiment 1.

[0029] The flexible conductor (1) has a plurality of copper foils (41) laminated in the thickness direction. The plurality of copper foils (41) are, for example, rectangular, having a long side and a short side. The thickness of the copper foils (41) is, for example, about 0.1 mm.

[0030] Additionally, the flexible conductor (1) includes an ultrasonic bonding portion (34), a fastening surface (35), and a fastening hole (36). For example, the ultrasonic bonding portion (34) is located at both ends in the long side direction of a plurality of copper foils (41).

[0031] As shown in FIG. 3, among the plurality of copper foils (41) included in the flexible conductor (1), the outermost copper foil (42) has a surface different from the laminated surface, that is, when the plurality of copper foils (41) are laminated, the two copper foils located outermost in the lamination direction have a surface different from the laminated surface, and each has a fastening surface (35) that is fastened to a counterpart member. Hereinafter, the fastening surface is not the entire surface of the surface layer of the flexible conductor (1), but the surface of the surface layer excluding the flexible part (38) is referred to as the fastening surface. The area where the flexible conductor (1) is fastened to a counterpart member may be a part of the fastening surface (35), and, for example, may be in contact with the first movable part (14) in the fastening area (37) shown in FIG. 3.

[0032] In the ultrasonic bonding portion (34) of the flexible conductor (1), a plurality of stacked copper foils (41) are ultrasonically bonded to each other. The ultrasonic bonding portion (34) refers to a portion where a plurality of stacked copper foils (41) are ultrasonically bonded to each other.

[0033] As shown in FIG. 3, the flexible conductor (1) according to the present embodiment has an ultrasonic bonding portion (34) located at a location corresponding to the four corners of the copper foil (41) among the bonding surfaces (35).

[0034] The × mark shown in FIG. 3 is a processing mark that occurs on the surface of a conductor during ultrasonic bonding. The processing mark occurs at a location that is sandwiched between the horn and the anvil of the device performing the ultrasonic bonding. FIG. 3 shows a case where there are three processing marks at each of the four corners of the copper foil (41) where the ultrasonic bonding part (34) is located, but the number of processing marks is not limited to three.

[0035] In addition, the location of the ultrasonic joint (34) is not limited to the four corners of the copper foil (41) as long as the flexible conductor (1) is at a location that does not impair flexibility.

[0036] In addition, the ultrasonic bonding portion (34) where ultrasonic bonding is performed is not limited to the outer circumference of the flexible conductor (1) as shown in FIG. 4, but may be provided in the central portion, such as a portion adjacent to the fastening hole (36). In addition, it may be provided outside the fastening area (37).

[0037] The ultrasonic bonding portion (34) of the flexible conductor (1) is bonded and integrated with adjacent copper foils (41) by applying ultrasonic vibrations to the copper foil (41) when ultrasonic bonding is performed.

[0038] Since the ultrasonic joint (34) of the flexible conductor (1) is joined so that a plurality of copper foils (41) are integrated in the thickness direction, when mounting the flexible conductor (1) to a movable part or terminal, the copper foils (41) are not scattered, and the flexible conductor (1) can be easily electrically connected to the driving device tip (13) of the switch (11), the first movable part (14), and the first terminal (12), etc.

[0039] In parts other than the ultrasonic joint (34) of the flexible conductor (1), the copper foil (41) is not joined to each other. Because the copper foil (41) is not joined to each other, the copper foil (41) can be freely bent, and the flexible conductor (1) can follow the movement of the first movable part (14).

[0040] It is preferable that multiple copper foils (41) of the flexible conductor (1) be ultrasonically bonded to each other in an area corresponding to the bonding surface (35). Additionally, it is preferable that the ultrasonically bonded portion (34) overlaps at least partially with the area corresponding to the bonding area (37). The area corresponding to the bonding surface (35) refers to the area of ​​the copper foil (41) where the bonding surface (35) is projected in the thickness direction of the flexible conductor (1).

[0041] By performing ultrasonic bonding on an ultrasonic bonding portion (34) that overlaps with at least a part of the bonding area (37), the bonding in the ultrasonic bonding portion (34) can suppress contact resistance by pressing the bonding area (37) when the flexible conductor (1) is mounted in addition to the bonding by ultrasonic bonding, so that the electrical resistance can be lowered compared to simply ultrasonic bonding.

[0042] Ultrasonic bonding can solid-state bond copper foils of the substrate. Since the flexible conductor (1) according to the present embodiment is bonded as a copper foil of the substrate by ultrasonic bonding, unlike the method of bonding copper foils by melting tin plating through spot welding or the like, there is no need to perform plating of tin or the like on each copper foil (41) for bonding.

[0043] In this way, by directly joining the copper foils (41) while they are in the form of copper foils without using tin plating, which has a higher electrical resistance value than copper foil, the electrical resistance value of the flexible conductor (1) can be lowered compared to that of a connection made by plating as in the past. Therefore, when making a flexible conductor with an equivalent resistance value, the number of copper foils (41) forming the flexible conductor (1) can be reduced compared to a flexible conductor using tin plating.

[0044] In addition, since plating is not performed on each copper foil (41), the process of plating on the copper foil (41) can be omitted, thereby reducing manufacturing costs.

[0045] In addition, there is a method of spot welding copper foil of a substrate to create a flexible conductor, but since copper melts at high temperatures, an oxide film is formed on the surface, so it is necessary to remove the oxide film. In the case of ultrasonic bonding, since bonding is performed in a solid state, bonding can be done below the melting point of the base material such as copper, so an oxide film is not formed.

[0046] Additionally, in the ultrasonic bonding part (34), it is preferable that the laminated copper foil (41) be ultrasonically bonded without a plating layer in between, but it is also acceptable for some layers to be bonded with a plating layer in between.

[0047] As shown in FIG. 3, the flexible conductor (1) has a fastening hole (36) on the fastening surface (35). The flexible conductor (1) is fastened to a mating member by the fastening hole (36). When fastened, a bolt (20), a nut (22), and a nut (23) are used. When the flexible conductor (1) is fastened to a mating member by the fastening hole (36), the fastening is not limited to bolts and nuts, and means such as insertion or welding may also be used.

[0048] By having a connecting hole (36) in the flexible conductor (1), it becomes easier to use it for a switch and other electrical equipment different from the switch (11) of the present embodiment compared to the case where it does not have a connecting hole (36).

[0049] In addition, it is not necessary to provide a fastening hole (36).

[0050] Next, a method for manufacturing the switch (11) of the present embodiment will be described.

[0051] First, a flexible conductor (1) of Embodiment 1, that is, a flexible conductor (1) in which each layer is ultrasonically bonded to one another, a vacuum valve (16), and a switch (11) in which the vacuum valve is mounted (excluding the vacuum valve (16) or the flexible conductor (1), etc.) are prepared. The ultrasonically bonded flexible conductor (1) can be manufactured by applying ultrasonic vibrations between copper foils (41) stacked in the thickness direction. In addition, details of the method for manufacturing the flexible conductor (1) will be described later.

[0052] Next, the vacuum valve (16) is mounted on the switch (11), and then the flexible conductor (1) is mounted on the first movable part (14) (movable electrode rod) connected to the vacuum valve (16). The first movable part (14) is mounted through the fastening hole (36) of the flexible conductor (1) so that the first movable part (14) passes through the fastening hole (36) of the flexible conductor (1), and the first movable part (14) and the flexible conductor (1) are combined. At this time, each copper foil (41) of the flexible conductor (1) is ultrasonically bonded at the ultrasonic bonding part (34), and since each copper foil (41) does not scatter, it can be easily mounted on the first movable part (14). The mounting of the first movable part (14) and the flexible conductor (1) can be done by fastening with a nut. The mounting of the first movable part (14) and the flexible conductor (1) is not limited to fastening by a nut, and may be mounted by other methods such as insertion.

[0053] Next, a flexible conductor (1) is mounted on the first terminal (12). The mounting can be achieved by aligning the position of the fastening hole of the first terminal (12) with the fastening hole (36) of the flexible conductor (1) and securing it with a nut (23) through a bolt (20). The mounting of the first movable part (14) and the flexible conductor (1) is not limited to fastening by a bolt, but may be mounted by other methods such as insertion.

[0054] In addition, the order of installation is not limited to the above, and the order of installation may be appropriately changed, such as by pre-assembling a part of the flexible conductor (1) before installing the vacuum valve (16) on the switch (11). Also, although the method of manufacturing the switch (11) having the vacuum valve (16) has been described here, other electrical devices such as disconnectors can be manufactured in the same way.

[0055] Embodiment 2.

[0056] The flexible conductor (2) in Embodiment 2 will be explained using FIG. 4. The description of the configuration similar to Embodiment 1 will be omitted. Also, in FIG. 4, the same reference numerals as in FIG. 1 to FIG. 3 represent the same or substantial parts.

[0057] FIG. 4 is a perspective view of a flexible conductor (2) according to Embodiment 2. As shown in FIG. 4, the position of the ultrasonic bonding portion (34) of the flexible conductor (2) of this embodiment is different from that of the flexible conductor (1) of Embodiment 1. Below, the differences from the flexible conductor (1) of Embodiment 1 will be explained in detail.

[0058] As shown in FIG. 4, in the flexible conductor (2) according to the present embodiment, the ultrasonic joining portion (34) is located within the range including the fastening hole (36) of the fastening surface (35). That is, the ultrasonic joining portion (34) is included in the fastening surface (35). In addition, the ultrasonic joining portion (34) and the fastening surface (35) may partially overlap.

[0059] In this way, the ultrasonic bonding part (34) can be provided in a portion adjacent to the fastening hole (36). By ultrasonically bonding the portion adjacent to the fastening hole (36), when the flexible conductor (2) is mounted, it is pressed when fastened with a bolt or nut, making the contact strong and further reducing the contact resistance value.

[0060] By performing ultrasonic bonding within a range including the fastening hole (36) which is the current path, the copper foils (41) in the current path portion are strongly bonded together. Since the copper foils (41) are strongly bonded together, the electrical resistance value of the flexible conductor (2) can be lowered compared to when the copper foils (41) are fastened with bolts or nuts. In addition, if there is no need to lower the electrical resistance value of the flexible conductor (2), the number of copper foils (41) forming the flexible conductor (2) can be reduced.

[0061] The × mark shown in FIG. 4 is a processing mark that occurs on the surface of the conductor during ultrasonic bonding. After ultrasonic bonding, a processing mark remains on the bonding surface (35) that is connected to the mating member, but since the processing mark is concave in shape, it does not affect contact with the mating member. The number of processing marks is not limited to the number shown. In addition, the arrangement pattern of the processing marks may be arranged in a grid shape, for example.

[0062] Embodiment 3.

[0063] The flexible conductor (3) in Embodiment 3 will be explained using FIGS. 5 and 6. Description of the configuration similar to Embodiment 1 will be omitted. Additionally, in FIGS. 5 and 6, the same reference numerals as in FIGS. 1 to 4 represent the same or substantial parts.

[0064] FIG. 5 is a perspective view of a flexible conductor (3) according to embodiment 3. FIG. 6 is a schematic diagram of the flexible conductor (3) according to embodiment 3, viewed in the direction of the arrow along the line A-A′ of FIG. 5. The flexible conductor (3) of this embodiment differs from the flexible conductor (1) of embodiment 1 in that a plating layer is provided on the copper foil (42). Below, the differences from the flexible conductor (1) of embodiment 1 will be explained in detail.

[0065] In the flexible conductor (3) according to the present embodiment, a plating layer such as tin is provided on the side of the copper foil (42) that is connected to the counterpart member, which is located on the outermost side among the plurality of copper foils (41) and connected to the counterpart member.

[0066] The area where the plating layer is provided may be the entire side where the copper foil (42) is connected to the counterpart member, or, for example, only the connection surface (35).

[0067] When copper foil is exposed to oxygen for a long time, an oxide film forms on its surface. To prevent the formation of this oxide film, it is advisable to apply plating to the entire copper foil.

[0068] When using a plating that melts due to frictional heat generated by ultrasonic bonding, such as tin plating, the plating melts due to frictional heat generated between the copper foils (41) before the bonding is completed in a solid state, causing slippage between the copper foils. As a result of the slippage, ultrasonic vibrations are not transmitted, and a bonding defect occurs.

[0069] By providing a plating layer only on the side of the copper foil (42) that is connected to the counterpart member, slippage between the copper foils (41) is suppressed, thereby preventing bonding defects. Additionally, since the ultrasonic bonding portion (34) of the copper foil (41) is firmly bonded, no oxide film is formed on the copper foil (41) bonded to another copper foil (41).

[0070] Additionally, among the copper foils (41), a plating layer may be provided on the entire or part of the copper foil on the opposite side from the connection surface (35) of the copper foil (42), which is located on the outermost side opposite to the copper foil (42) that is connected to the counterpart member.

[0071] Additionally, it is preferable that the plating be performed only on the side of the copper foil (42) that is connected to the counterpart member, but a plating layer may be provided on a part of the side that is not connected to the counterpart member of the copper foil (42), or a plating layer may be provided on a part of the other copper foil (41).

[0072] For plating, a material corresponding to the temperature during ultrasonic bonding, such as tin and silver, may be used.

[0073] In FIG. 6, the copper foil (41) is shown in a state of 10 sheets, but the number of copper foils (41) is not limited to 10 sheets.

[0074] Next, a method for manufacturing a flexible conductor according to embodiments 1 to 3 will be described. The method for manufacturing a flexible conductor according to embodiments 1 to 3 includes a step 101 of stacking a plurality of copper foils (41) in the thickness direction, and a step 102 of ultrasonically bonding the plurality of stacked copper foils (41) to each other at both ends of the stretching direction of the stacked copper foils (41).

[0075] In addition, in the step 102 of ultrasonically bonding a plurality of stacked copper foils (41) to each other, the step 102a of ultrasonically bonding a plurality of stacked copper foils (41) to each other on the fastening surface (35) of a flexible conductor may be included.

[0076] In addition, in the step 102 of ultrasonically bonding a plurality of stacked copper foils (41) to each other, the step 102b of ultrasonically bonding a plurality of stacked copper foils (41) to each other at the corner portions of the stacked copper foils (41) may be included.

[0077] In addition, the method for manufacturing a flexible conductor according to embodiments 1 to 3 includes step 103 of forming a plating layer on the fastening surface (35) of the copper foil (41), and step 103 of forming the plating layer may be performed before step 101, between step 101 and steps 102, 102a, and 102b, and furthermore, after steps 102, 102a, and 102b.

[0078] That is, to produce an ultrasonically bonded flexible conductor, a copper foil (41) stacked in the thickness direction is inserted between a horn and an anvil mounted on an ultrasonical bonder, and ultrasonic vibrations are transmitted to the copper foil (41) while applying pressure. By doing so, oxide films or contaminants on the bonding interface are removed, and the copper foils (41) can be bonded by bringing the crystal grains between each copper foil (41) close to each other until they are at an atomic distance apart.

[0079] In addition, in each of the embodiments described in this specification, the material, dimensions, shape, relative arrangement relationship, or conditions of implementation of each component may be described; however, these are examples in all aspects and are not limited to the described embodiments. Accordingly, countless variations not exemplified are envisioned within the scope of each embodiment. For example, this includes cases where any component is modified, added, or omitted, and furthermore, cases where at least one component from at least one embodiment is extracted and combined with a component of another embodiment. Explanation of the symbols

[0080] 1, 2, 3: Flexible conductor 11: Switch 12: First terminal 14: First movable part 16: Vacuum valve 17: Fixed part 32: First part 33: Second part 35: Fastening surface 36: Fastening hole 41, 42: Copper foil

Claims

Claim 1 A flexible conductor having a plurality of copper foils stacked in the thickness direction, wherein the outermost copper foil among the plurality of copper foils has a fastening surface that is fastened to a counterpart member on a surface different from the stacked surface, and wherein, at the corner portion of the copper foil among the fastening surfaces, the plurality of stacked copper foils are ultrasonically bonded to each other. Claim 2 A flexible conductor having a plurality of copper foils stacked in the thickness direction, wherein the outermost copper foil among the plurality of copper foils is fastened to a counterpart member on a surface different from the stacked surface and has a fastening surface having a plating layer, and furthermore, at both ends of the copper foil in the elongation direction, the plurality of stacked copper foils are ultrasonically bonded to each other in an area corresponding to the fastening surface. Claim 3 A flexible conductor according to claim 1, having a fastening hole on the fastening surface. Claim 4 A flexible conductor according to claim 2, having a fastening hole on the fastening surface. Claim 5 An electric device comprising a flexible conductor as described in any one of claims 1 to 4, a movable part connected to the first end and a second end of the flexible conductor, and a terminal connected to the second end. Claim 6 delete

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