JP5212752B2 - Terminal metal fitting structure and method - Google Patents

Description

  The present invention relates to a terminal metal connection structure and a connection method.

  Conventionally, for example, in a terminal fitting used for a coil component, as shown in Patent Document 1, a lead wire is fixed to a terminal fitting by bending and fixing a fixing portion, and then connected by welding.

JP 2007-67206 A

  As described above, in the configuration in which the fixing portion is caulked, there is a risk that the lead wire may be damaged due to the caulking pressure. If the conductor is sufficiently thick, the strength is only slightly reduced. However, in the case of a thin conductor, special handling is required. Therefore, an object of the present invention is to provide a connection structure and a connection method of a terminal metal fitting in which damage to a conducting wire to be connected is suppressed.

In order to solve the above problems, the present invention provides a connection structure of a terminal fitting to which a conducting wire is connected, the terminal fitting having a connecting portion to which the conducting wire is connected, and the connecting portion is a terminal. A pedestal portion on which the lead wire routed toward the metal fitting is placed, a holding portion that extends from the pedestal portion and holds the lead wire placed on the pedestal portion, and extends from the pedestal portion and welded to the lead wire The holding portion is located on the distal end side in the extending direction extending from the pedestal portion and is in contact with or close to the surface of the pedestal portion, and is located on the proximal end side in the extending direction. And a spring part that suppresses the separation of the receiving part from the surface of the pedestal part, the receiving part is in contact with or close to the pedestal part, and the distal end is located on the distal side from the facing part in the extending direction. And a separation portion that is separated from the pedestal portion as it goes to the side, and the distance from the facing portion to the pedestal portion is smaller than the diameter of the conducting wire Together becomes, the distance to the pedestal is configured to be larger than the diameter of the conductor at the most advanced position of the separation portion, the connecting wire structure of the terminal fitting to retain the wire resiliently between the receiving portion and the base portion provide.

  According to such a structure, since it is the structure which inserts a conducting wire between the receiving part which is a location closed beforehand, and a base part, and hold | maintains a conducting wire, a conducting wire is hold | maintained only with the spring force of a holding part. Therefore, it is possible to prevent the conductor from being damaged by setting the spring force to an appropriate strength in advance.

  According to such a configuration, the lead wire can be easily inserted and held between the receiving portion and the pedestal portion.

  The receiving portion has a receiving surface that faces the pedestal portion and holds the conductive wire together with the surface of the pedestal portion, and the receiving surface defines an edge portion located upstream in the drawing direction of the conductive wire, and the edge portion is a surface. It is preferable that it is processed.

  According to such a configuration, damage to the conducting wire can be further suppressed.

  Moreover, it is preferable that the spring part is comprised by the gentle arc shape from a base part to a receiving part.

  According to such a structure, the characteristic of a spring part can be improved and it can hold | maintain suitably from a thin conducting wire to a thick conducting wire.

  Moreover, the conducting wire may be a stranded wire formed by twisting a plurality of wires.

Further, in order to solve the above problems, the present invention is a connecting method for connecting a conductor to a terminal fitting, and a pedestal portion on which a conductor led to the terminal fitting is placed, and a pedestal extending from the pedestal portion. A holding portion that holds the lead wire that is pulled out and placed on the pedestal portion; and a weld piece that extends from the pedestal portion and is welded to the lead wire, the holding portion extending in the extending direction from the pedestal portion a receiving portion located on the side in contact with or close to the pedestal surface, possess a suppressing spring portion spaced apart from the base portion surface of the receiving portion is positioned in the direction base end side extending, receiving portion A distance between the facing portion and the pedestal portion, and a facing portion that is in contact with or close to the pedestal portion; Becomes smaller than the diameter of the conducting wire, and the distance to the pedestal at the most advanced position of the separated portion A preparation step of preparing a terminal fitting that is configured to be larger than the diameter of the wire, from an opening formed between the separation portion and the base portion, the pushed-in wires between the receiving portion and the base portion, Conductive wire holding step of placing the conductive wire on the pedestal portion while elastically holding between the receiving portion and the pedestal portion , attaching the weld piece to the conductive wire placed on the pedestal portion, and conducting wire and weld piece And a connecting method of the terminal fitting for connecting the conducting wire to the terminal fitting.

  According to the connection structure and connection method of the terminal fitting of the present invention, it is possible to suppress damage to the conducting wire to be connected.

The perspective view of the coil components which concern on embodiment of this invention. The perspective view of the component main body of the coil component which concerns on embodiment of this invention. The (a) side view, (b) bottom view, (c) top view, (d) front view of the core of the coil component which concerns on embodiment of this invention. The (a) side view, (b) bottom view, (c) front view of the terminal fitting of the coil component which concerns on embodiment of this invention. The partial side view in the state which attached the terminal metal fitting to the collar part of the coil component which concerns on embodiment of this invention. The partial bottom view in the state where the terminal metal fitting was attached to the collar part of the coil component concerning an embodiment of the invention. The figure which shows the magnitude relationship between the holding | maintenance part of a terminal metal fitting and conducting wire which concern on this Embodiment. The figure which shows the process of making the conducting wire of the coil components which concerns on embodiment of this invention into a strand wire. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The figure which concerns on a conducting wire holding process. The figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The figure of the state which has wound conducting wire around the core part. The figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The figure of the state which fixed the conducting wire. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The figure which concerns on a coating | peeling peeling process. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The figure which concerns on a welding process.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. A coil component 1 shown in FIG. 1 is an antenna coil that is soldered to land patterns 10A and 10A on a mounting substrate 10 and has a length of about 8 in the longitudinal direction (the axial direction of a core portion 3 described later). 0.0 mm, the vertical direction perpendicular to the longitudinal direction (the direction from the mounting substrate 10 toward the coil component 1 is defined as upward), and the vertical direction and the width direction perpendicular to the longitudinal direction are each about 2.7 mm. The coil component 1 includes a main body 1A and a case 1B that covers the main body 1A. The case 1B is a substantially rectangular parallelepiped insulating resin case that is open on one side and that defines a space for housing the main body 1A therein, and is provided with a plurality of claws for fixing the main body 1A.

  As shown in FIG. 2, the main body 1 </ b> A mainly includes a core 2, a pair of terminal fittings 6 and 7, and a conductive wire 8, and is 7.0 mm in the longitudinal direction, the width direction, and the vertical direction, It is configured to be 2.0 mm and 1.8 mm.

  As shown in FIG. 3A, the core 2 is provided at the winding core portion 3 and at one end and the other end in the longitudinal direction of the winding core portion 3. It is configured. Since the collar part 4 and the collar part 5 have the same shape and configuration, the collar part 4 will be described as a representative.

  The core portion 3 has a substantially rectangular cross section perpendicular to the longitudinal direction, and is positioned at the center in the width direction with respect to the pair of flange portions 4 and 5 as shown in FIG. Are arranged to be.

  The flange portion 4 faces the mounting substrate 10 in a state where the coil component 1 is mounted on the mounting substrate 10 and, as shown in FIG. 3A, a mounting surface 41 substantially parallel to the axis of the core portion 3. And a connecting surface 42 which is opposite to the mounting surface 41 and parallel to the mounting surface 41 with respect to a virtual line X in which the axis of the winding core portion 3 is extended to the flange portion 4 side, and intersects the width direction and the mounting surface Side surfaces 43 and 43 (FIG. 3D) located between 41 and the connecting surface 42 are provided. As shown in FIG. 3B, the mounting surface 41 is formed with a pair of mounting-side recesses 41a and 41a arranged in the width direction. As shown in FIG. 3C, the connecting surface 42 is formed with one connecting-side recess 42a at the center position in the width direction. Further, as shown in FIG. 3D, in the flange portion 4, side surfaces 43 and 43 are provided with step portions 43a and 43a, respectively. These stepped portions 43a and 43a are hooked by a claw (not shown) in the case 1B when the main body 1A is inserted into the case 1B, thereby preventing the main body 1A from falling off the case 1B.

  The pair of terminal fittings 6 and 7 are made of phosphor bronze plates and have the same shape and the same configuration. Therefore, the terminal metal fitting 6 is demonstrated as a representative.

  As shown in FIG. 4 (a), the terminal fitting 6 includes a mounting portion 61 and a connecting portion 62 that extend substantially parallel to each other, and a connecting portion 63 that connects the mounting portion 61 and the connecting portion 62. It is configured in a letter shape. The mounting part 61 and the connecting part 62 are arranged in a distance that allows the flange part 4 to be sandwiched between the mounting face 41 and the connecting face 42 while being in contact with the mounting face 41 and the connecting face 42.

  The mounting portion 61 is a member that becomes a mounting portion when the coil component 1 is mounted on the mounting substrate 10, and is shown on the surface that becomes the substantially U-shaped inner peripheral surface as shown in FIGS. As shown, it has a pair of convex portions 61 </ b> A and 61 </ b> A that are bocce. The pair of convex portions 61A and 61A are inserted into the pair of mounting side concave portions 41a and 41a in a state where the terminal fitting 6 is mounted on the flange portion 4. Further, as shown in FIG. 5, the pair of convex portions 61 </ b> A and 61 </ b> A has a gap between the inner peripheral surface of the mounting portion 61 and the mounting surface 41 with the inner peripheral surface of the mounting portion 61 slightly spaced from the mounting surface 41. Is formed in a size that does not completely fit in the mounting-side recesses 41a and 41a.

  Also, as shown in FIGS. 4B and 6, the mounting portion 61 has a longitudinal direction (first direction) at a terminal position in the longitudinal direction from the flange portion 4 toward the core portion 3 (first direction). An edge 61B extending in two directions is defined, and a notch 61a is formed by cutting away from the edge 61B in a direction opposite to the first direction. A bottom edge 61C extending in the width direction is defined at the deepest portion in the notch 61a. The length in the width direction of the bottom edge portion 61C is configured to be smaller than the opening width in the edge portion 61B of the notch 61a. In addition, as shown in FIG. 6, the notch 61 a is located at a position where the axis of the core portion 3 extends in the plan view of the mounting surface 41 and the imaginary line X obtained by extending the axis of the winding core portion 3 toward the flange portion 4 side. It is formed so as to be arranged at a substantially central position.

  The connecting portion 62 is a member to which the end portion of the conducting wire 8 is connected, and mainly includes a pedestal portion 62A, a holding portion 64, and a weld piece 62B. The pedestal portion 62A is a flat plate that is connected to the connecting portion 63 and substantially parallel to the mounting portion 61, and constitutes a part of the above-described substantially U-shape. As shown in FIG. 4B, the pedestal portion 62A has a convex portion 62C, which is a bocce, on the surface that becomes the substantially U-shaped inner peripheral surface. The convex portion 62C is inserted into the connecting-side concave portion 42a in a state where the terminal fitting 6 is attached to the flange portion 4. Further, as shown in FIG. 5, the convex portion 62 </ b> C has an inner peripheral surface of the pedestal portion 62 </ b> A slightly spaced from the connecting surface 42, and a gap is formed between the inner peripheral surface of the pedestal portion 62 </ b> A and the connecting surface 42. Thus, the size is such that it does not completely fit in the connecting-side recess 42a. Further, in the pedestal portion 62A, an edge portion located on the core portion 3 side on the upper surface and extending in the width direction is chamfered.

  As shown in FIG. 4C, the holding portion 64 extends from the edge intersecting the width direction of the pedestal portion 62A in the width direction and is folded back so that the tip portion is above the upper surface of the pedestal portion 62A. The receiving portion 64A is defined at the distal end side position in the extending direction, and the spring portion 64B is defined at the proximal end side position. As shown in FIG. 7, the receiving portion 64 </ b> A includes a separation portion 64 </ b> C located at the foremost end in the extending direction of the holding portion 64, a space between the separation portion 64 </ b> C and the spring portion 64 </ b> B, and the upper surface of the pedestal portion 62 </ b> A. And a facing portion 64D in contact therewith. In addition, the receiving portion 64A has a distance of a> b in the state where the conductor 8 is not held when the distance to the pedestal portion 62A of the separating portion 64C is a and the distance to the pedestal portion 62A of the facing portion 64D is b. It is configured to bend gently.

  The spring portion 64B is formed by bending the receiving portion 64A into a gentle arc shape so as to dispose the receiving portion 64A on the pedestal portion 62A.

  Further, in the holding portion 64, as shown in FIG. 5, the edge portion of the surface (receiving surface) facing the pedestal portion 62A on the side of the core portion 3 is chamfered.

  The weld piece 62B extends in the width direction from the pedestal portion 62A in the same manner as the holding portion 64, and is welded to the end portion of the conducting wire 8 to constitute the weld portion 65 (FIG. 2). The weld piece 62 </ b> B is provided at a position farther from the holding core 64 in the longitudinal direction than the core portion 3, and the longitudinal width thereof is also wide.

  Conductive wire 8 is a heat-resistant insulating coated conductive wire coated with polyamideimide or the like, and is a conductive wire having a diameter of about 30 μm. As shown in FIG. It is held by the holding parts 64 and 74 of the metal fitting 6 and the terminal metal piece 7 and is connected to the welding parts 65 and 75 by welding. In the conducting wire 8, most of the portion wound around the core portion 3 is a single wire, and the winding portion 3 starts and turns several turns, and the winding end turns several turns to one turn. To the holding portions 64 and 74 are formed by twisting three conducting wires 8 (twisted wire 8A). As shown in FIG. 8, the stranded wire 8 </ b> A is folded back so that the single conductor 8 shown in FIG. 8A is folded into three as shown in FIG. 8B, and then, As shown in FIG. 8C, the wire is formed by twisting, is a wire that is stronger than a single wire and stronger against breakage. The diameter of the stranded wire 8A is configured to be smaller than a and larger than b as shown in FIG.

  The land pattern 10A on the mounting substrate 10 on which the coil component 1 having the above configuration is mounted has a shape substantially similar to the shape of the mounting portion 61 including the notch 61a, and the mounting portion 61 is placed on the land pattern 10A. It is comprised so that the surplus part of the grade which can pull a fillet between the periphery of the mounting part 61 in a state is provided. Specifically, the surplus portion is 0.15 mm on the core portion 3 side, 0.85 mm on the non-winding core portion 3 side, and 0.15 mm on the side surface side in the width direction.

  Hereinafter, the manufacturing method of the coil component 1 of the said structure is demonstrated. Also in this description, unless otherwise specified, only the collar portion 4 and the terminal fitting 6 will be described as representatives. Further, in the completed shape of the coil component 1, the conductor 8 will be described by assuming that a portion where the conductor 8 is wound around the winding core portion 3 is an upstream side and an end portion extending from the portion to the terminal fittings 6 and 7 is a downstream side. First, the core 2 having the terminal fittings 6 and 7 attached to the flange portions 4 and 5 is prepared (preparation step), and the core 2 is attached to a jig (not shown). Further, a stranded wire 8A is formed from the conducting wire 8 discharged from the nozzle. In this state, as shown in FIG. 9, the stranded wire 8A is placed on the pedestal portion 62A and held by the holding portion 64 (conductor holding step). Specifically, the stranded wire 8A is pushed into the gap between the receiving portion 64A and the pedestal portion 62A from the opening portion of the separation portion 64C, and is sandwiched between the receiving portion 64A and the pedestal portion 62A. The stranded wire 8 </ b> A is configured to extend from the holding portion 64 to the same position as the tip of the welding piece 62 </ b> B on the side opposite to the winding core 3 on the side opposite to the winding core 3 in the longitudinal direction.

  By holding the stranded wire 8A in this way, the stranded wire 8A can be held only by the spring force of the holding portion 64 (spring force of the spring portion 64B). Since the spring force of the spring part 64B is weaker than the caulking force when caulking and holding the conducting wire with a holding piece or the like, the twisted wire 8A is not damaged or loosened and is held in a suitably twisted state. can do. Since the spring portion 64B that transmits the spring force to the receiving portion 64A is formed in a gentle arc shape, the spring force can be transmitted to the receiving portion 64A even when the receiving portion 64A is wide open. Therefore, even when the diameter of the stranded wire 8A is large, the stranded wire 8A can be suitably held by the holding portion 64.

  Since the space between the spacing portion 64C into which the stranded wire 8A is inserted and the pedestal portion 62A (a in FIG. 7) is larger than the diameter of the stranded wire 8A, the stranded wire 8A can easily reach between the receiving portion 64B and the pedestal portion 62A. Can be pushed in. Further, the stranded wire 8A is drawn from the holding portion 64 toward the core portion 3, and the surface of the holding portion 64 that sandwiches the stranded wire 8A and the core portion 3 side of the upper surface of the pedestal portion 62A are chamfered. Therefore, damage to the stranded wire 8A routed from the terminal fitting 6 to the core portion 3 is suppressed.

  After the stranded wire 8A is held by the holding portion 64, the stranded wire 8A extending from the holding portion 64 to the non-winding core portion 3 side is positioned corresponding to the cc line in FIG. 8C (near the end of the stranded wire 8A). Then, as shown in FIG. 10, a jig (not shown) is rotated, and the wire 8 is wound around the core portion 3 by so-called bank winding. At this time, at least the first turn of the stranded wire 8 </ b> A is wound around the core portion 3. Therefore, the conducting wire 8 wired between the terminal fitting 6 and the core part 3 (drawing portion) becomes a stranded wire 8A. As described above, the stranded wire 8A has higher strength than the single-wire conducting wire 8, and therefore, disconnection or the like in the lead-out portion can be reduced.

  After winding the conductive wire 8 to the vicinity of the flange portion 5 in the core portion 3, the stranded wire 8 </ b> A is formed again, and the stranded wire 8 </ b> A is wound around the core portion 3 after one to several turns, and then the connecting portion of the terminal fitting 7. As shown in FIG. 11, the stranded wire 8A is held by the holding portion 74, and the stranded wire 8A is cut in the same manner as the terminal fitting 6 side.

  Next, as shown in FIG. 12, the twisting of the stranded wire 8A on the side opposite to the winding core 3 (downstream) from the holding portion 64 is loosened (untwisting step). As a means for loosening the twist, it is performed by unwinding the stranded wire 8A with a comb-like jig (not shown). At this time, since the stranded wire 8 </ b> A is held by the holding portion 64, unwinding of the stranded wire 8 </ b> A on the winding core portion 3 side (upstream side) from the holding portion 64 is suppressed.

  Next, the portion where the twist of the stranded wire 8A is loosened and overlapped when the welding piece 62B is bent toward the pedestal portion 62A is irradiated with laser light by a laser irradiation device (not shown), and the insulating coating layer Is peeled off (coating peeling step). Since the stranded wire 8A is already unwound in the untwisting process, the conductive wires 8 do not overlap excessively. Therefore, the insulating coating of the portion where the stranded wire 8A has been unwound can be easily peeled off by laser irradiation.

  Next, as shown in FIG. 13, the weld piece 62B is bent and welded so as to cover the peeled portion of the stranded wire 8A, thereby forming the welded portion 65 shown in FIG. 2 (welding process). Since the insulation coating is peeled off at the place where the stranded wire 8A is welded, the insulation coating is prevented from entering the welding location during welding, and the weld piece 62B and the stranded wire 8A can be suitably welded. Further, since the stranded wire 8A is held by the holding portion 64, the stranded wire 8A on the core portion 3 side is not loosened or welded from the holding portion 64. Thereby, the conducting wire 8 between the holding part 64 and the core part 3 can be reliably held as the stranded wire 8A, and the strength of the conducting wire 8 between the holding part 64 and the core part 3 is ensured. Can be secured.

  Thereafter, the coil component 1 is completed by mounting the case 1B. In the coil component 1, when energized, a magnetic flux that passes through the flange 4 to the core 3 to the flange 5 is generated. This magnetic flux mainly passes through the surface intersecting with the longitudinal direction of the flange 4 and the flange 5 and goes out of the core 2. At this time, one of the places where the magnetic flux passes most is the core portion 3 side of the mounting surface 41. In the present embodiment, it is possible to suppress the flow of magnetic flux from being blocked by the terminal fitting 6 by notching the core portion 3 side of the mounting portion 61 arranged on the mounting surface 41 to form the notch 61a. .

  Further, the notch 61a expands on the side of the core portion 3 where the influence of the magnetic flux is large and narrows on the bottom edge portion 61C side where the influence of the magnetic flux is small, so that the mounting area can be increased as much as possible without impeding the passage of the magnetic flux.

  In general, in the coil component, an overcurrent loss occurs when the flow of magnetic flux is hindered. However, in the present embodiment, since the configuration does not hinder the flow of magnetic flux as described above, the overcurrent loss is reduced. The Moreover, since it is only notched, the mounting area of the mounting part 61 does not decrease excessively. Therefore, the Q characteristic can be improved with the mounting strength secured.

  More specifically, the convex portion 61A and the convex portion 62A are inserted into the mounting-side concave portion 41a and the connecting-side concave portion 42a, and the mounting portion 61 and the connecting portion 62 are spaced apart from the mounting surface 41 and the connecting surface 42, respectively. Is formed. Since the magnetic flux can come out of the core 2 from this gap, the overcurrent loss can be further reduced. Further, since the concave and convex portions are engaged as described above, the position of the terminal fitting 6 with respect to the core 2 can be accurately defined, and displacement of the terminal fitting 6 from the core 2 can be suppressed.

1. ・ Coil parts 1A ・ ・ Main body 1B ・ ・ Case 2 ・ ・ Core 3 ・ ・ Core 4、5 ・ ・ Hard 6、7 ・ ・ Terminal fitting 8 ・ ・ Conductor 8A ・ ・ Strand 10 ・ ・ Mounting Substrate 10A, Land pattern 41, Mounting surface 41a, Mounting side recess 42, Connection surface 42a, Connection side recess 43, Side surface 43a, Step portion 61, Mounting portion 61A, Projection portion 61B .. Edge portion 61C .. Bottom edge portion 61a .. Notch 62 .. Connection portion 62A.. Base portion 62B.. Welding piece 62C ... Projection 63 ... Connection part 64A Holding part 64A 64B ... Spring part 64C Separation part 64D Face part 65 ... Welded part

Claims (5)

A connection structure of a terminal fitting to which a conductor is connected,
The terminal fitting has a connecting portion to which the conducting wire is connected,
The connecting portion includes a pedestal portion on which the conducting wire routed toward the terminal fitting is placed, and a holding portion that holds the conducting wire that extends from the pedestal portion and is placed on the pedestal portion. And a weld that extends from the pedestal and is welded to the conductor.
The holding portion is positioned on the distal end side in the extending direction extending from the pedestal portion and is in contact with or close to the surface of the pedestal portion; and the holding portion is positioned on the proximal end side in the extending direction. A spring part that suppresses separation from the surface of the pedestal part,
The receiving portion has a facing portion that comes into contact with or close to the pedestal portion, and a separating portion that is located on the distal end side from the facing portion in the extending direction and is separated from the pedestal portion as it goes to the distal end side. The distance from the facing portion to the pedestal portion is smaller than the diameter of the conducting wire, and the distance to the pedestal portion at the most distal position of the separated portion is configured to be larger than the diameter of the conducting wire,
A connection structure for a terminal fitting, wherein the conductor is elastically held between the receiving portion and the pedestal portion. The receiving portion has a receiving surface facing the pedestal portion and holding the conductive wire together with the surface of the pedestal portion,
  2. The terminal metal joint structure according to claim 1, wherein an edge portion located upstream in the drawing direction of the conducting wire is defined on the receiving surface, and the edge portion is chamfered. . The terminal metal connection structure according to claim 1, wherein the spring portion is formed in a gentle arc shape from the pedestal portion to the receiving portion. The terminal metal connection structure according to any one of claims 1 to 3, wherein the conducting wire is a stranded wire formed by twisting a plurality of wires. A connection method for connecting a conductor to a terminal fitting,
  From the pedestal part on which the conducting wire routed toward the terminal fitting is placed, the holding part that holds the conducting wire extended from the pedestal part and placed on the pedestal part, and from the pedestal part A holding piece that extends and is welded to the conductive wire, and the holding portion is positioned on the front end side in the extending direction from the pedestal portion and is in contact with or close to the surface of the pedestal portion. A spring portion that is positioned on the base end side in the extending direction and suppresses the separation of the receiving portion from the surface of the pedestal portion, and the receiving portion is a facing portion that is in contact with or close to the pedestal portion A distance portion that is located on the distal end side from the facing portion in the extending direction and that is separated from the pedestal portion as it goes to the distal end side, and the distance from the facing portion to the pedestal portion is greater than the diameter of the conductor. As the distance decreases, the distance to the pedestal at the foremost position of the spacing is larger than the diameter of the conductor. A preparation step of preparing a made the terminal fitting,
  The conductive wire pushed between the receiving portion and the pedestal portion is elastically held between the receiving portion and the pedestal portion through an opening formed between the separation portion and the pedestal portion. And conducting wire holding step of placing the conducting wire on the pedestal portion,
  A welding step of attaching the welding piece to the conducting wire placed on the pedestal portion and welding the conducting wire and the welding piece to make a connection;
A method for connecting terminal fittings, comprising connecting the conducting wires to the terminal fittings.

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