WO2018128026A1

WO2018128026A1 - Wire fixing method and wire fixing structure

Info

Publication number: WO2018128026A1
Application number: PCT/JP2017/042091
Authority: WO
Inventors: 晴崇近藤
Original assignee: オリンパス株式会社
Priority date: 2017-01-05
Filing date: 2017-11-22
Publication date: 2018-07-12

Abstract

This wire fixing method is a wire fixing method for fixing a wire to a fixing target member, the wire fixing method including: a holding member installing step for installing a holding member, which holds the wire, on one end in a longitudinal direction of the wire; a closely contacting step for bring the holding member into close contact with a first surface of the fixing target member; and a bonding step in which the fixing target member and the holding member are bonded by irradiating at least one portion of a second surface on the reverse side of the first surface of the fixing target member with a laser beam which has an optical axis twisted with respect to the central axis of the wire and has a beam light flux region that does not pass through the wire and passes through the holding member.

Description

Wire fixing method and wire fixing structure

The present invention relates to a wire fixing method and a wire fixing structure for a plate-like member.

Conventionally, as a technique for fixing a wire to a plate-like member, laser welding is known in which a laser beam is irradiated to melt and solidify. For example, in an insertion portion of an endoscope that is inserted into the body of a subject, a caulking member is fixed to a wire on a bending piece located on the distal end side of a plurality of cylindrical bending pieces, and the caulking member is laser-welded. (See, for example, Patent Document 1). The wire is a stranded wire formed by bundling a plurality of strands, and an end portion on the side connected to the bending piece is held by a caulking member.

FIG. 10 is a partial cross-sectional view for explaining a conventional wire fixing method. First, the wire 204 is inserted into the plurality of bending pieces (the bending pieces 201 to 203 in FIG. 10). At this time, a caulking member 205 that holds the wire 204 is provided at the end of the wire 204. The wire 204 is inserted into the wire receiver 201a formed in the bending piece 201 located at the tip of the plurality of bending pieces until the caulking member 205 is disposed. Thereafter, the wire receiver 201a and the caulking member 205 are irradiated with laser light to be melted and solidified. Thereby, the wire 204 is fixed to the bending piece 201.

Japanese Patent Laid-Open No. 5-207964

However, since the conventional wire fixing method described above irradiates the crimping member with laser light, the quality of the wire inside the crimping member deteriorates due to the thermal effect of the laser irradiation, and the desired wire strength cannot be obtained. . Therefore, a wire fixing method that does not cause deterioration of the strength of the wire has been demanded.

The present invention has been made in view of the above, and an object of the present invention is to provide a wire fixing method and a wire fixing structure that do not cause deterioration of the quality of the wire with respect to a member to be fixed.

In order to solve the above-described problems and achieve the object, a wire fixing method according to the present invention is a wire fixing method for fixing a wire to a member to be fixed, and the wire is fixed to one end in the longitudinal direction of the wire. A holding member disposing step of disposing a retaining member that retains the wire; a close-contacting step of bringing the holding member into intimate contact with the first surface of the member to be fixed; and an optical axis twisted with the central axis of the wire A laser beam having a relationship in which a beam beam region of the laser beam does not pass through the wire and passes through the holding member is changed to a laser beam on the back side of the first surface of the member to be fixed. A joining step of joining the fixing target member and the holding member by irradiating at least one portion of the surface of the second surface.

In the wire fixing method according to the present invention, in the above invention, the intimate step is formed in the member to be fixed, and the holding member is formed in a hole that penetrates between the first surface and the second surface. The holding member is brought into close contact with the first surface of the member to be fixed while accommodating a part of the fixing target member, and the joining step is performed at one or more locations on the second surface along an edge of the hole portion. Are bonded by irradiating the laser beam.

In the wire fixing method according to the present invention, in the above invention, the laser beam is applied only to the fixing target member to melt the fixing target member, and the holding member is heated by heat transmitted through the fixing target member. It is characterized in that a part of each is melted and joined.

The wire fixing structure according to the present invention is a wire fixing structure for fixing a wire to a member to be fixed, and includes a holding member that is provided at one end in the longitudinal direction of the wire and holds the wire. A part of the member is in close contact with the first surface of the member to be fixed, reaches the first surface from a second surface on the back side of the first surface of the member to be fixed, and the holding member At least one weld that joins the member to be fixed and the holding member that does not reach the wire is provided.

According to the present invention, there is an effect that the wire can be fixed to the member to be fixed without causing the quality deterioration of the wire.

FIG. 1 is a schematic diagram showing a configuration of a connection structure having a connection structure according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a diagram for explaining a wire fixing method of the connection structure according to Embodiment 1 of the present invention. FIG. 4 is a diagram for explaining a wire fixing method of the connection structure according to Embodiment 1 of the present invention. FIG. 5 is a diagram for explaining a wire fixing method for a connection structure according to a modification of the first embodiment of the present invention. FIG. 6 is a schematic diagram showing a configuration of a connection structure having a connection structure according to Embodiment 2 of the present invention. 7 is a cross-sectional view taken along line BB in FIG. FIG. 8 is a diagram for explaining a wire fixing method of the connection structure according to Embodiment 2 of the present invention. FIG. 9 is a diagram for explaining a wire fixing method for a connection structure according to Embodiment 2 of the present invention. FIG. 10 is a partial cross-sectional view for explaining a conventional wire fixing method.

Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. In addition, drawing is typical and the relationship and ratio of the dimension of each part differ from reality. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings is contained.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a configuration of a connection structure having a connection structure according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along line AA in FIG. The connection structure 1 shown in the figure includes a tubular member 10, a wire 20 that extends inside the tubular member 10, extends from the tubular member 10, and a crimping member 21 that holds the wire 20. This connection structure 1 can be applied to, for example, a connection between a bending piece and an operation wire at a bending portion of an insertion portion provided in an endoscope.

The cylindrical member 10 is an annular member formed by circling a plate-like member. The member to be fixed according to the present invention has a thickness that can be melted from the laser light irradiation surface to the back surface by a laser beam, which will be described later, such as a cylindrical member or a flat member. The member to be fixed.

The wire 20 is a stranded wire formed by bundling a plurality of strands. The wire 20 may be composed of one strand in addition to the stranded wire.

The caulking member 21 is an end portion of the wire 20 and is a holding member that holds the wire 20 by being crimped to the end portion on the tubular member 10 side. The outer diameter formed by the outer surface of the caulking member 21 and the outer surface formed by the outer surface intersecting with the plane orthogonal to the central axis of the wire 20 is larger than the diameter of the wire 20. The caulking member 21 is formed by crimping an annular or cylindrical member to the wire 20. As a caulking method, known crimping methods such as crimping and crimping such as drawing and tapping and swaging that performs drawing while cold forging can be used. By providing the caulking member 21, the wire 20 can be held firmly. By adjusting the axial length of the crimping member 21, the fixing strength of the crimping member 21 can be made larger than the tensile strength of the wire 20 alone.

The cylindrical member 10 and the wire 20 are connected via a caulking member 21. Specifically, the cylindrical member 10 and the caulking member 21 are connected by spot welding using a laser beam. The tubular member 10 and the crimping member 21 are spot-welded at a plurality of locations, and a plurality of welds 11 are formed on the tubular member 10 as shown in FIG. The welded portion 11 is hardened after a part of the tubular member 10 and a part of the surface of the caulking member 21 are dissolved. The welded portion 11 has a formation region from the back surface (second surface described later) of the inner wall surface (first surface described later) on the side where the crimp member 21 of the cylindrical member 10 is in close contact with the crimp member 21. Reaches the inner wall surface (first surface) on the close side, includes a part of the crimping member 21, and does not reach the wire 20. Although Embodiment 1 demonstrates as what is spot-welded along the central-axis direction of the cylindrical member 10, the location to weld is not restricted to the five locations shown in FIG. What is necessary is just the number of locations and positions where the caulking member 21 can be fixed.

Next, a method for fixing the wire of the connection structure 1 described above will be described with reference to FIGS. 3 and 4. 3 and 4 are diagrams for explaining a wire fixing method of the connection structure according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view in which a plane perpendicular to the central axis N ₁₀ of the cylindrical member 10 is a cut surface. Figure 4 is a partial cross-sectional view taken along the plane passing through the central axis N ₂₀ of the central axis N ₁₀ and the wire 20 of the tubular member 10 shown in FIG. 3, when viewed from the left side of FIG. 3 It is a fragmentary sectional view.

First, the caulking member 21 is disposed at the tip of the wire 20 and the caulking member 21 is caulked (fixing member disposing step). Thereafter, the wire 20 is inserted into the tubular member 10 from the side where the crimping member 21 is disposed, and the crimping member 21 is brought into close contact with the inner wall surface of the tubular member 10 (contact step). At this time, for example, the image is captured by a camera or the like, and the position of the caulking member 21 is confirmed by the captured image. When the caulking member 21 is brought into close contact, an actuator such as an air cylinder, a collet chuck, or the like is used to bring the caulking member 21 into close contact with the inner wall surface of the tubular member 10. This is preferable in that the position can be fixed. In the first embodiment, the inner wall surface to close the caulking member 21 and the first surface in the cylindrical member 10, the center axis N ₂₀ of the central axis N ₁₀ and the wire 20 of the tubular member 10 is parallel to Yes.

After the caulking member 21 is disposed on the tubular member 10, the laser light source 100 irradiates the laser beam L. At this time, the laser beam L is applied to the rear surface of the surface (front surface) of the cylindrical member 10 on the side where the caulking member 21 is disposed. In the first embodiment, the second surface is the laser irradiation surface and the back surface of the first surface where the caulking member 21 is in close contact. As shown in FIGS. 3 and 4, when the laser beam L is irradiated, a part of the cylindrical member 10 is melted and flows toward the caulking member 21 due to its own weight. A part of the caulking member 21 is melted by the heat of the melted tubular member 10. Thereafter, when the irradiation of the laser beam L is stopped and the heat is cooled, a part of the melted tubular member 10 and a part of the caulking member 21 are cured. Thereby, the one welding part 11 is formed and the cylindrical member 10 and the crimping member 21 are joined. If along the central axis N ₁₀ direction of the cylindrical member 10 side of the caulking member 21 only to closely, can be reliably and firmly bonded.

At this time, as shown in FIG. 3, the irradiation position of the laser beam L to the cylindrical member 10 is a position shifted from the central axis N ₂₀ of the wire 20, that is, the central axis N ₂₀ and the optical axis N _L of the laser light L. The position where it does not intersect. The central axis N ₂₀ and the optical axis N _L of the laser beam L have a twisted relationship. Further, the beam flux region R _{L of} the laser light L does not pass through the wire 20 and passes through the crimping member 21. The beam flux region R _L is, for example, a region that extends in the direction of the optical axis N _{L of} the laser light L, and is a region through which the light flux that constitutes the laser light L passes. In the first embodiment, the axis N ₃₀ passing through the center axis N ₂₀ of the central axis N ₁₀ and the wire 20 of the tubular member 10 and the optical axis N _L of the laser beam L, and parallel to each other.

After that, for example, by irradiating the laser beam L along the longitudinal direction of the wire 20, the connection structure 1 in which the welded portion 11 as shown in FIG. 1 is formed is produced (joining step). The laser beam L is a pulsed laser beam that can be controlled in nanoseconds to several seconds. A plurality of welds 11 are formed by irradiating the cylindrical member 10 with the laser light L intermittently while moving the laser light source 100 along the central axis N ₁₀ of the cylindrical member 10. The irradiation interval of the laser beams L adjacent in time series is larger than the spot diameter of the laser beam L as a distance. The cylindrical member 10 may be moved with respect to the laser light source 100. Moreover, although demonstrated in FIG. 1 that the some welding part 11 is formed along the longitudinal direction of the wire 20, if the cylindrical member 10 and the crimping member 21 can be connected, it will not restrict to this. For example, the welded portions 11 may be formed and connected in two rows along the direction of the central axis N ₁₀ of the cylindrical member 10 on the opposite sides via the wire 20, or the center of the cylindrical member 10 may be connected. along the axial N ₁₀ direction, it may be connected to form a welded portion 11 alternately via the wire 20.

In the first embodiment of the present invention described above, one end of the wire 20 is fixed by the caulking member 21, and the wire 20 is inserted into the tubular member 10 from the side where the caulking member 21 is disposed. The laser beam L whose axis N _L has a twisted relationship with the central axis (center axis N ₂₀ ) of the wire 20 is irradiated to the back surface of the cylindrical member 10 on the side where the crimping member 21 is disposed, and one of the cylindrical members 10 is irradiated. The cylindrical member 10 and the caulking member 21 are bonded together by dissolving and then curing a part of the caulking member 21. Thereby, a wire can be simply fixed with respect to the member of fixation object, without forming a wire receiver like the past.

Further, in the first embodiment, the laser beam L in which the optical axis N _L has a twisted relationship with the central axis (central axis N ₂₀ ) of the wire 20 is transmitted from the back surface of the cylindrical member 10 on the caulking member 21 side. By irradiating only the tubular member 10, a part of the tubular member 10 is melted, and a part of the caulking member 21 is melted by heat conduction of the melted tubular member 10. Thereby, it can suppress that the internal stress of the crimping member 21 is open | released with a heat | fever, As a result, the fall of the crimping | compression-bonding load to the wire 20 of the crimping member 21 can be suppressed.

Further, according to the first embodiment, since the cylindrical member 10 is irradiated with the laser light L that is pulsed light, the caulking member 21 at the time of laser welding is compared with the irradiation of the continuous wave laser light. Can be reduced, and deterioration before and after irradiation with laser light can be suppressed. Further, since the cylindrical member 10 is irradiated with the laser light L, which is pulsed light, the thermal effect on the wire 20 is not affected so much as to be annealed. Can be prevented.

Further, according to the first embodiment, since the laser beam L is irradiated so that the beam flux region _RL of the laser beam L does not pass through the wire 20, heat conduction to the wire 20 is suppressed. The strength reduction of the wire 20 can be suppressed.

In the first embodiment described above, the holding member has been described as the caulking member 21 having a hollow cylindrical shape as shown in FIG. 4. However, even if the holding member has a cap structure with one end sealed. Good. When the holding member has a cap structure, the caulking member 21 is not required to be caulked, and the holding member can be disposed by being attached to the wire 20.

In the first embodiment described above, the laser beam L is described as a pulsed laser beam. However, as long as the cylindrical member 10 can be melted and cured, the present invention is not limited to this, and a continuous wave laser is used. Light irradiation may be performed. Moreover, in Embodiment 1 mentioned above, although demonstrated as what irradiates a laser beam to several places and forms the several welding part 11, if the set joining intensity | strength can be satisfy | filled, a laser beam will be carried out to only one place. May be used to form one weld 11. Further, when one or a plurality of welds are formed by irradiating a laser beam a plurality of times with respect to a certain laser beam irradiation site, the number of irradiation sites is one.

Also, those in the first embodiment described above, the caulking member 21 in the state of being closely in the tubular member 10, the center axis N ₂₀ of the central axis N ₁₀ and the wire 20 of the tubular member 10 are parallel to each However, as long as the cylindrical member 10 and the crimping member 21 can be joined, the central axis N ₁₀ and the central axis N ₂₀ may be non-parallel.

(Modification of Embodiment 1)
FIG. 5 is a diagram for explaining a wire fixing method for a connection structure according to a modification of the first embodiment of the present invention. In the first embodiment described above, the axis N ₃₀ passing through the center axis N ₂₀ of the central axis N ₁₀ and the wire 20 of the tubular member 10, as the optical axis N _L of the laser beam L, and parallel to each other As described above, in this modification, the optical axis N _L is inclined with respect to the axis N ₃₀ . In this case, an axis N ₃₀ on a plane including the optical axis N _L and orthogonal to the central axes N ₁₀ and N ₂₀ intersects the optical axis N _L. As shown in FIG. 5, even when the optical axis N _L relative to the axis N ₃₀ is inclined, the optical axis N _L has a twist relationship with the central axis of the wire 20 (the central axis N ₂₀₎ The back surface of the cylindrical member 10 on the side where the crimping member 21 is disposed is irradiated with the laser beam L to dissolve a part of the cylindrical member 10 and a part of the surface of the crimping member 21. Also in this modification, the irradiation position of the laser beam L, the beam light beam region R _L of the laser beam L does not pass through the wire 20, and a position passing through the caulking member 21.

Even if the optical axis N _L is inclined with respect to the axis N ₃₀ as in the present modification, the positional relationship between the optical axis N _L and the central axis N ₂₀ and the beam flux region of the laser light L When the positional relationship between R _L and the wire 20 and the caulking member 21 satisfies the relationship described above, the same effect as in the first embodiment can be obtained.

(Embodiment 2)
FIG. 6 is a schematic diagram showing a configuration of a connection structure having a connection structure according to Embodiment 2 of the present invention. 7 is a cross-sectional view taken along line BB in FIG. In the second embodiment, a hole for arranging the caulking member 21 is formed in the cylindrical member 10 described above. A connection structure 1A shown in the figure includes a cylindrical member 10A, a wire 20 extending from the cylindrical member 10A, and extending from the cylindrical member 10A, and a crimping member 21 that holds the wire 20.

As shown in FIG. 6, the cylindrical member 10A is formed with a hole 10a which is a through hole. The hole 10a has a rectangular opening shape. The connection structure 1A is joined in a state in which a part of the caulking member 21 protrudes from the hole 10a of the cylindrical member 10A. A plurality of welds 12 by laser light are formed at the joint portion. The welded portion 12 is formed along the central axis of the cylindrical member 10A. In the second embodiment, it is assumed that the welds 12 are formed in two rows along the central axis direction of the cylindrical member 10 A on opposite sides via the wire 20.

Next, a method of fixing the connection structure 1A described above will be described with reference to FIGS. 8 and 9 are diagrams for explaining a wire fixing method for a connection structure according to Embodiment 2 of the present invention. FIG. 8 is a diagram for explaining a main part of the connection structure 1A, and is a schematic diagram showing a configuration of the cylindrical member 10A before welding with a laser beam. As shown in FIG. 8, the cylindrical member 10 A is formed with a hole portion 10 a that is a through hole through which the outer peripheral side and the inner peripheral side pass.

First, as described above, the caulking member 21 is disposed at the tip of the wire 20 and the caulking member 21 is caulked. Thereafter, the wire 20 is inserted into the cylindrical member 10A from the side where the crimping member 21 is disposed, and the crimping member 21 is brought into close contact with the inner wall surface of the cylindrical member 10A. At this time, the caulking member 21 is in close contact with the wall surface of the cylindrical member 10A and connected to the opening of the hole portion 10a, and a part of the caulking member 21 protrudes from the hole portion 10a of the cylindrical member 10A. ing. In order to bring the caulking member 21 into close contact with the inner wall surface of the cylindrical member 10A, an actuator such as an air cylinder, a collet chuck, or the like may be used as in the first embodiment. Moreover, in this Embodiment 2, although the crimping member 21 is crimped | bonded to the internal wall surface of 10 A of cylindrical members, it demonstrates as a part of the crimping member 21 projecting from the hole 10a. Depending on the diameter and the size of the opening of the hole 10a, the crimping member 21 may not protrude from the hole 10a.

After the caulking member 21 is disposed on the cylindrical member 10A, the laser light source 100 irradiates the laser light L. At this time, the laser beam L is applied to the outer surface of the cylindrical member 10A, that is, the back surface on the caulking member 21 side, in the vicinity of the hole 10a. When the laser beam L is irradiated, a part of the cylindrical member 10A, for example, the opening part of the hole 10a is dissolved, and a part of the crimping member 21 is dissolved by the heat conduction of the dissolved cylindrical member 10A. At this time, depending on the irradiation range of the laser light L, the caulking member 21 is also irradiated with the laser light L, and a part of the surface of the caulking member 21 is dissolved. Thereafter, when the irradiation of the laser beam L is stopped and the heat is cooled, a part of the melted cylindrical member 10A and a part of the caulking member 21 are cured. Thereby, the one welding part 12 is formed and 10 A of cylindrical members and the crimping member 21 are joined.

At this time, the irradiation position of the laser beam L relative to the tubular member 10A, as shown in FIG. 9, a position shifted from the center axis N ₂₀ of the wire 20, and the optical axis N _L of the central axis N ₂₀ with the laser beam L The position where it does not intersect. The central axis N ₂₀ and the optical axis N _L of the laser beam L have a twisted relationship. Further, the beam flux region R _{L of} the laser light L does not pass through the wire 20 and passes through the crimping member 21.

After that, for example, the connection structure in which the welded portion 12 as shown in FIG. 6 is formed by irradiating the laser beam L along the edge extending in the longitudinal direction of the wire 20 among the edges formed by the opening of the hole 10a. A body 1A is produced.

In the second embodiment of the present invention described above, one end of the wire 20 is fixed by the caulking member 21, and the wire 20 is inserted into the cylindrical member 10A from the side where the caulking member 21 is disposed. The axis N _L irradiates the back surface of the cylindrical member 10A on the side where the caulking member 21 is disposed with the laser beam L having a twisted relationship with the central axis (the central axis N ₂₀ ) of the wire 20 to form one of the cylindrical members 10A. The cylindrical member 10 A and the caulking member 21 are bonded together by dissolving a part of the surface of the caulking member 21 and the caulking member 21. Thereby, a wire can be simply fixed with respect to the member of fixation object, without forming a wire receiver like the past.

Moreover, in Embodiment 2 mentioned above, since the hole 10a is formed in the cylindrical member 10A, when the laser beam L is irradiated, the hole 10a suppresses heat conduction in the cylindrical member 10A. Thus, heat is stored in the vicinity of the hole 10a. Thereby, the cylindrical member 10A in the vicinity of the hole 10a can be melted more efficiently. At this time, if only the cylindrical member 10 A is irradiated with the laser light L, the thermal effect of the wire 20 and the crimping member 21 can be suppressed while joining the cylindrical member 10 A and the crimping member 21.

Moreover, in Embodiment 2 mentioned above, since the crimping member 21 was arrange | positioned in the hole 10a formed in 10 A of cylindrical members, the position of the crimping member 21 when it penetrates inside the cylindrical member 10A is set. It can be confirmed, and the arrangement of the caulking member 21 with respect to the cylindrical member 10A can be easily performed as compared with the first embodiment described above.

Moreover, in Embodiment 2 mentioned above, since a part of crimping member 21 is accommodated in the hole 10a formed in the cylindrical member 10A, it is orthogonal to the central axis direction of the cylindrical member 10A of the connection structure 1A. The maximum length in the radial direction can be made smaller than the corresponding length of the connection structure 1 described above. Thereby, the connection structure 1 A can be reduced in size as compared with the connection structure 1 described above.

In the second embodiment described above, the shape formed by the opening of the hole 10a is a rectangular shape, but is not limited thereto. For example, the shape formed by the opening may be a circle, an ellipse, or a polygon. Moreover, the hole 10a is not limited to a through-hole having an opening surrounded by four sides as shown in FIG. 8, and may have a notch shape in which one end of a cylindrical member is notched.

In the second embodiment described above, the description has been made on the assumption that the crimping member 21 is brought into close contact with the edge of the hole 10a. However, depending on the diameter of the crimping member 21 and the shape of the wire 20, the crimping member for the cylindrical member 10A is used. 21 and / or the closeness of the wire 20 is different. For example, when the caulking member 21 is in close contact with the edge of the hole 10a, the wire 20 may come into contact with the cylindrical member 10A or may not come into contact. Further, the caulking member 21, a wall surface continuous with the opening of the hole portion 10a, extends along the central axis N _10, of the two walls that face each other, sometimes closely only one wall.

So far, the embodiment for carrying out the present invention has been described, but the present invention should not be limited only by the embodiment described above.

Thus, the present invention can include various embodiments without departing from the technical idea described in the claims.

As described above, the wire fixing method and the wire fixing structure according to the present invention are useful for suppressing deterioration of the quality of the wire with respect to the member to be fixed.

DESCRIPTION OF

SYMBOLS

1,

1A connection structure

10, 10A Cylindrical member

10a Hole part

11, 12 Welding part 20 Wire 21 Crimp member

Claims

A wire fixing method for fixing a wire to a member to be fixed,
A holding member disposing step of disposing a holding member for holding the wire at one end in the longitudinal direction of the wire;
An intimate step of bringing the holding member into intimate contact with the first surface of the member to be fixed;
Laser light having an optical axis having a twisted relationship with the central axis of the wire, and a laser beam beam region of the laser light that does not pass through the wire and passes through the holding member A joining step for joining the fixing target member and the holding member by irradiating at least one place on the second surface on the back side of the first surface of the member;
A method for fixing a wire, comprising:
The close contact step is formed in the fixing target member, and a part of the holding member is accommodated in a hole portion that penetrates between the first surface and the second surface, and the fixing target member Bringing the holding member into intimate contact with the first surface;
2. The wire fixing method according to claim 1, wherein in the bonding step, the laser beam is irradiated to one or more portions of the second surface along an edge of the hole.
The laser beam is applied only to the fixing target member to melt the fixing target member, and a part of the holding member is melted and joined by heat transmitted through the fixing target member. The wire fixing method according to claim 1 or 2.
A wire fixing structure for fixing a wire to a fixing target member,
A holding member that is provided at one end of the wire in the longitudinal direction and holds the wire;
With
The holding member is partly in close contact with the first surface of the fixing target member,
The fixing target member that reaches the first surface from the second surface on the back side of the first surface of the fixing target member, includes a part of the holding member, and does not reach the wire; and At least one welded portion for joining the holding member is provided.