JP2010034338A - Relaying method and relaying structure of coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relaying method and relaying structure of a coil component for reliably relaying a wire and a terminal by eliminating the step and equipment for cutting the wire and suppressing the projection of the wire at cut part. <P>SOLUTION: A relaying structure includes a body part 31 with a base 33 supporting a lead wire 4 while being extended from a skeleton in a drawing direction of the lead wire 4, a supporting part 32 extended from the body part 31 in a direction crossing the extended direction of the body part 31, and a welded piece 32A extended from the supporting part 32 in the drawing direction of the lead wire 4. A coil component relaying method includes: a wire arranging step of arranging the lead wire 4 on the base 33 along the extended direction of the body part 31; a welded-piece adhered arrangement step of allowing the welded piece 32A and the lead wire 4 to adhere to each other; and a relaying step of forming a welded ball 32B at the supporting part 32 by welding the welded piece 32A and the part of the lead wire 4 adhering to the welded piece 32A and removing the lead wire 4 on the more opposite side of the skeleton than the welded ball 32B at the same time. The relaying structure is formed by the method. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coil component connecting method and a connecting structure.

2. Description of the Related Art Conventionally, when connecting a thin wire to a terminal of a coil component by welding, particularly in a coil component or the like, there is a method of connecting by laser bonding as shown in Patent Document 1, for example. In the case of this method, after connecting the wire drawn from the core part of the coil component, unnecessary wires are cut to manufacture the coil component.
JP-A-5-205839

  When a wire is cut with a cutter or the like after connecting, the wire cannot always be cut in the vicinity of the connecting point, so the cut wire protrudes from the connecting point, and the protruding wire is caught by other electronic components, etc. There was a fear. Moreover, it was necessary to provide the process and equipment for wire cutting. Therefore, the present invention eliminates the steps and equipment related to the cutting of the wire, suppresses the protrusion of the wire at the cutting point, and reliably connects the wire and the terminal of the coil component and the connecting structure. The purpose is to provide.

  In order to solve the above-mentioned problem, the present invention is a method for connecting a wire to a connecting portion of a terminal fitting, wherein the connecting portion is constituted by a connecting equivalent portion in a state before connecting, and the wire is formed from the housing. A main body portion having a base portion for supporting the wire while extending in the direction of pulling out the wire, a support portion extending from the main body portion in a direction intersecting the extending direction of the main body portion, and extending in the wire pulling direction from the support portion A preparation step for preparing a connecting wire equivalent portion including a welding piece to be performed, a wire placement step for placing the wire on the base portion so as to follow the extending direction of the main body portion, and the welding piece and the wire are in close contact with each other Welding the weld piece close-contact arrangement step to be combined with the portion where the wire and the weld piece are in close contact and overlapping to form a weld ball on the support portion, and at the same time, the wire located on the side of the rod body from the weld ball is removed from the weld ball. A connecting process to be removed, and It provides a connecting wire method yl components.

  According to such a method, since the welding ball which is a connecting portion is formed by welding and the wire is removed from the welding ball at the same time, the step of cutting the wire is not necessary, and the process related to the connecting can be shortened. it can. In addition, since the welded ball is formed, the cut portion of the wire is taken into the weld ball, so that the wire is prevented from protruding from the weld ball that is the connection point, and the connection defect is reliably reduced. In addition, the wire and the support portion can be electrically and physically joined to each other by a welding ball.

  In the above connecting method, the connecting process step includes an irradiation step of irradiating the welding piece and the wire with laser light, the focal diameter of the laser light is configured to be larger than the width in the drawing direction of the welding piece, and the laser light is welded. It is preferable that irradiation is performed so as to straddle the piece and the wire extending from the welded piece to the side of the rod body, and the center of the focal diameter is located on the downstream side of the wire drawing direction from the width center of the welded piece.

  According to such a method, since the laser beam is surely irradiated to the wire and the welded piece in the vicinity of the wire, the wire and the welded piece can be surely melted and fused, and reliably joined electrically. be able to.

  Moreover, it is preferable that a welding piece close_contact | positioning arrangement | positioning process is equipped with the clamping process which clamps a wire with a support part and a base part.

  According to such a method, since the wire is clamped and fixed, it is possible to prevent the wire from coming off the position of the weld piece when forming the weld ball. Further, since the base portion and the wire come into contact with each other, the base portion is melted together when the wire is melted, and the weld piece, the wire, and the base portion can be integrated to form a weld ball.

  Moreover, it is preferable that a welding piece close_contact | positioning arrangement | positioning process includes the spraying process which applies the air which flows to the direction which goes to a welding piece from a wire to a wire, and makes a wire contact | adhere to a welding piece.

  According to such a method, since the wire can be brought into close contact with the welded piece without being bent, the wire and the welded piece can be easily fused and integrated when melted.

  Moreover, it is preferable to comprise a welding piece thinner than a support part in a preparatory process. According to such a method, it becomes easier for heat to enter the welded piece than the support portion. Accordingly, the weld piece is easily melted, and welding can be easily performed. In addition, since the support portion is less likely to melt than the weld piece, a weld ball can be suitably attached to the support portion.

  In addition, the wire placement step includes forming a first hooking portion for hooking the wire on a part of the outer peripheral surface on the upstream side in the wire drawing direction from the welding piece, and then a main body on the downstream side in the wire drawing direction from the welding piece. It is preferable to include a latching step of forming a second latching portion that latches the wire on a part of the outer peripheral surface of the portion. Moreover, it is preferable to provide the removal process which removes a 2nd latching | locking part after a connection process process.

  According to such a method, the wire can be reliably fixed to the connecting wire corresponding portion along the main body portion. And after welding, since a 2nd latching | locking part becomes unnecessary, size reduction of a coil component can be achieved by removing this.

  In order to solve the above-mentioned problem, the present invention is composed of a connecting portion and a wire connected to the connecting portion, and the connecting portion extends from the housing of the electronic component in the wire drawing direction. A main part, a base part that extends from one side of the extending direction of the main part of the wire part in a direction crossing the extending direction and carries the drawn wire, and the extending direction of the connecting part main body A support portion extending in a direction crossing the extending direction from the side portion, and a connection portion that is integrally supported by the support portion and welded to the wire to form a weld ball shape. A coil having a wire stopper that is erected toward the surface side carrying the wire at the front end portion of the base portion. Provide a connecting structure for parts.

  According to such a configuration, the presence of the wire stopper makes it difficult for the wire to come off from the base portion at the time of connection, and the position of the connection portion can be reliably controlled. Therefore, a suitable weld ball can be formed in the connection portion, and the connection failure can be reduced and the wire and the support portion can be reliably electrically connected.

  Moreover, in the connection structure of the said structure, it is preferable that the wire diameter of a wire is 100 micrometers or less.

  According to the connecting method and the connecting structure of the present invention, it is possible to eliminate the steps and equipment related to the cutting of the wire, suppress the protrusion of the wire at the cutting point, and reliably connect the wire and the terminal.

  Hereinafter, a connection structure and a connection method for coil parts according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10.

  A coil component 1 shown in FIG. 1 mainly includes a bobbin 2 that is a casing and wound with a wire, a terminal fitting 3 that is a connecting wire equivalent portion, and a conductive wire 4 that is a wire. In addition, as shown in FIG. 10, the final coil component 1 has a conductive wire 4 electrically connected to the terminal fitting 3 to form a welding ball 32B, which will be described later. The hook 31B and the position restricting portion 34) are provided in a removed state.

  The bobbin 2 is made of a resin such as a liquid crystal polymer, has a winding portion (not shown) around which the conducting wire 4 is wound, and a groove 2a for guiding the conducting wire 4 from the winding portion (not shown) to the terminal fitting 3 is formed. Has been. The groove 2 a is formed on one surface of the bobbin 2 and opens to one end surface where the terminal fitting 3 is provided.

  As shown in FIGS. 2 and 3, the terminal fitting 3 is made of phosphor bronze with tin (Sn) plating, and in a state before connection, the main body portion 31, the support portion 32, and the base portion 33. And the position restricting portion 34. The conductor 4 is connected to the terminal fitting 3 to provide a wire connection structure in the coil component 1. The main body 31 is composed of a long plate material, and one end in the longitudinal direction is the tip, and the base end is embedded and held in the bobbin 2. A first hook 31A is defined at the base end portion of the main body 31, and a second hook 31B is erected from one side edge of the tip portion toward one surface of the main body 31. Is provided.

  In the first latching portion 31A, as shown in FIG. 4, four corners are chamfered in a cross section orthogonal to the longitudinal direction. Therefore, when the conducting wire 4 is wound around the first latching portion 31A, it is suppressed that the conducting wire 4 is damaged at the corners of the first latching portion 31A.

  The support part 32 is extended in the direction which cross | intersects a longitudinal direction from the one side edge of the main-body part 31 close to 31 A of 1st latching parts. A welding piece 32A that protrudes toward the front end in the longitudinal direction is provided at the front end side in the longitudinal direction of the support portion 32 in the extending direction. The weld piece 32A has a longitudinal width (projection amount) W of about 0.2 mm. As shown in FIG. 5, the weld piece 32A includes the support portion 32 and the main body portion 31. When it is bent along one surface, it is arranged so as to be located on a straight line between the base portion 33 and the position restricting portion 34 and from the base portion 33 toward the position restricting portion 34. Further, the weld piece 32 </ b> A is configured to be thinner than the support portion 32.

  The base portion 33 protrudes in a direction orthogonal to the longitudinal direction from the other side edge of the main body portion 31 adjacent to the first hooking portion 31A. The side portion connected to the first hook portion 31A of the base portion 33 is chamfered in the same manner as the first hook portion 31A. Therefore, when the conducting wire 4 drawn out from the first latching portion 31 </ b> A is hung on the base portion 33, the conducting wire 4 is suppressed from being damaged.

  Further, as shown in FIGS. 3 and 4, a wire stopper 33 </ b> A is provided at the distal end portion of the base portion 33 so as to stand toward one surface side of the main body portion 31. As shown in FIG. 4, the distance L1 from the support portion 32 to the wire stopper 33A is set so that the tip of the support portion 32 does not interfere with the wire stopper 33A when the support portion 32 is bent.

  The position restricting portion 34 protrudes in a direction perpendicular to the longitudinal direction from the other side edge of the main body portion 31 adjacent to the second hooking portion 31B, on the tip side from the base portion 33.

  The conducting wire 4 is a coated conducting wire coated with AI (polyamideimide), and has a wire diameter including an insulating coating of about 30 μm.

  Hereinafter, a method of connecting the lead wire 4 to the terminal fitting 3 will be described. First, the main body 31 shown in FIG. 2 is prepared (preparation process), and the lead wire 4 wound around the winding portion (not shown) of the bobbin 2 as shown in FIG. The main body part 31 is routed up to one surface, and the lead wire 4 is arranged from one side of the main body part 31 to one side edge, and the lead wire 4 is hooked on the first hook part 31A for about a half turn. In this case, since the first hooking portion 31A is chamfered, it is possible to prevent the lead wire 4 from being damaged, prevent disconnection or the like, and wind it appropriately.

  The conductive wire 4 is hooked to one side edge in the first hooking portion 31A and then routed to the lower surface and wired to the vicinity of the base portion 33, and then drawn from the other side edge side of the first hooking portion 31A. It is hooked on the base portion 33. Since the base portion 33 is also chamfered in the same manner as the first hooking portion 31A, disconnection of the conductive wire 4 is suppressed. The conductive wire 4 hooked and drawn out by the base portion 33 is wired on one surface of the base portion 33 and extends in the longitudinal direction to a position on one surface of the position restricting portion 34. The conducting wire 4 extending to the position restricting portion 34 is wired from the position on the front end side of the position restricting portion 34 to the lower surface side of the main body portion 31, and is led out from one side edge in the vicinity of the second hooking portion 31B. It is hooked around the stopper 31B (latching process) and fixed to the terminal fitting 3 (wire arranging process).

  In this state, the portion between the base portion 33 and the position restricting portion 34 of the conducting wire 4 is in a floating state. Therefore, in this state, the covering of the conductive wire 4 between the base portion 33 and the position restricting portion 34 is peeled off by a laser oscillator (not shown) or the like. At this time, since the position of the conducting wire 4 is fixed by the base portion 33 and the position restricting portion 34, the conducting wire 4 is not moved by an impact at the time of peeling and can be suitably peeled off.

  After the covering of the conducting wire 4 is peeled off, as shown in FIG. 5 and FIG. 6A, the support portion 32 is bent along one surface of the main body portion 31 and cooperates with the base portion 33 to conduct the conducting wire. 4 is clamped (clamping process). In this case, the weld piece 32 </ b> A is disposed above the conductive wire 4 positioned between the base portion 33 and the position restricting portion 34.

  The conducting wire 4 between the base portion 33 and the position restricting portion 34 is peeled off as described above, and may hang down as shown in FIG. 6A due to an impact at the time of peeling. In this case, since a gap is formed between the weld piece 32A and the conductive wire 4, even if each of the weld piece 32A and the conductive wire 4 is melted, there is a possibility that a poor connection will occur without being fused. Therefore, in order to suppress this connection failure, as shown in FIG. 6 (b), high-pressure air is blown with an unillustrated injector so that the conductive wire 4 is brought into close contact with the weld piece 32A (spraying process). . Thereby, the conducting wire 4 adheres closely to the welding piece 32A (welding piece contact arrangement process). In the spraying process, before the support portion 32 is bent, the conductor 4 may be moved in advance to the support portion 32 side by blowing air. Further, the spraying step is not necessarily performed if the conductor does not sag as shown in FIG.

  When the conductor 4 is energized and bent by a solid object such as a jig and the conductor 4 is caused to follow the weld piece 32A, the conductor 4 may be cut by the jig. However, when the conductor 4 is blown along with the welding piece 32A by air, only the gas urges the conductor 4 and it is possible to suppress the occurrence of cutting or the like.

  After the weld piece 32A is disposed in close contact with the conductor 4, the laser beam is irradiated toward the weld piece 32A and the conductor 4 as shown in FIG. 7 by an unshown laser welding machine (irradiation process). The laser welder used at this time has a performance of irradiating a YAG laser having a wavelength of about 1064 nm.

  With a laser welder (not shown), the focal diameter of the focal region P of the laser beam is made larger than the width W of the weld piece 32A (about 0.3 mm), and the weld piece 32A and the weld piece 32A are downstream (the rudder side). ) And the center of the focal region P is irradiated from the center of the width W of the weld piece 32A.

  By irradiating in this manner, the laser beam is reliably irradiated to the lead wire 4 and the weld piece 32A in the vicinity of the lead wire 4, so that the lead wire 4 and the weld piece 32A are reliably melted. Moreover, since the conducting wire 4 and the welded piece 32A are in close contact, the conducting wire 4 and the welded piece 32A are melted, so that the conducting wire 4 and the welded piece 32A are fused, and the connection as shown in FIGS. The weld ball 32B which is a part is formed. By forming the weld ball 32B, the conducting wire 4 and the terminal fitting 3 are reliably connected electrically and physically. In addition, since the welding piece 32A is thin compared with the support part 32, it is easy to heat into the welding piece 32A. Therefore, the weld piece 32A is easily melted, and as shown in FIG. 9, the support portion 32 which is the base portion of the weld piece 32A and the base portion 33 holding the conductive wire 4 together with the support portion 32 are welded. A weld ball 32B can be formed.

  During welding, the weld piece 32A and the conductor 4 are melted. However, immediately after melting, the weld ball 32B is also semi-liquid, and therefore the conductor 4 extending from the bobbin 2 cannot be fixed. However, since the lead wire 4 is sandwiched and fixed by the support portion 32 and the base portion 33, the lead wire 4 can be fixed to the base portion 33 even when the half turn lead wire 4 is entangled and hooked by the first hook portion 31 </ b> A. There is no deviation from above, and it can be suitably held at the welding location. Moreover, in the 1st latching | locking part 31A, since it can hold | maintain the conducting wire 4 in a welding location even if it hangs only by half-turning as mentioned above, compared with the state where multiple turns were tied conventionally. Thus, the conducting wire 4 can be shortened, and the electrical resistance of the conducting wire 4 as a whole can be reduced.

  When the conducting wire 4 in the irradiation region P is melted, the conducting wire 4 located downstream from the welding ball 32B is fused at the welding location (connection process step). Since the welding ball 32B, which is a connecting point, is formed by welding, and at the same time, the conductive wire 4 is removed from the welding ball 32B, the process of cutting the conductive wire 4 is not necessary, and the process of connecting the conductive wire 4 to the terminal fitting 3 is performed. It can be shortened. At this time, since the lead wire 4 taken into the weld ball 32B is melted, there is no tip of the melted portion of the lead wire 4 in the weld ball 32B, and the end of the lead wire 4 protrudes from the weld ball 32B. Absent.

  After the welding is performed, as shown in FIG. 10, the position restricting portion 34 and the second hooking portion 31B are cut off, and the terminal fitting 3 is formed so that the welding ball 32B is substantially at the tip position.

  The connecting method and connecting structure of the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims. For example, the conductive wire 4 is coated with flame retardant polyamideimide, but is not limited thereto, and urethane or the like may be used as a coating. In this case, it is not necessary to peel off the coating, and it is possible to enter the welding piece arrangement step immediately after the wire arrangement step and to perform welding thereafter. In this case, the carbonized coating is included in the welded portion. However, since the lead wire related to the welded portion is a single wire, excessive generation of carbides is suppressed, and welding can be suitably performed.

Although the bobbin has been described as a housing, the present invention is not limited thereto, and the connecting method and the connecting structure of the present invention may be applied to a core made of a magnetic material such as ferrite. Further, the present invention can also be applied to a type of coil component that holds a lead wire drawn on a lead frame as disclosed in Japanese Patent Application Laid-Open No. 2006-222223. In addition, although a laser welding machine that irradiates a YAG laser is used, the present invention is not limited to this. For example, a laser that uses SHG that is half the wavelength of a YVO laser, a CO ₂ laser, or a YAG laser, that is, a laser using a second harmonic, LD (Semiconductor) A laser welding machine that emits laser, excimer laser, or the like may be used.

The fragmentary top view which concerns on the latching process of the coil components which concern on embodiment of this invention. The partial top view before winding the conducting wire of the coil component which concerns on embodiment of this invention. The partial perspective view before winding the conducting wire of the coil component which concerns on embodiment of this invention. Sectional drawing along the IV-IV line of FIG. The fragmentary top view which concerns on the welding piece contact | positioning arrangement | positioning process of the coil components which concern on embodiment of this invention. The partial side view which concerns on the coil component which concerns on embodiment of this invention before (a) spraying process, (b) after spraying process. The fragmentary top view which concerns on the irradiation process of the coil components which concern on embodiment of this invention. The fragmentary top view which concerns on the connection process process of the coil components which concern on embodiment of this invention. The partial side view which concerns on the connection process process of the coil components which concern on embodiment of this invention. The fragmentary top view which concerns on the removal process of the coil components which concern on embodiment of this invention.

Explanation of symbols

1 .. Coil parts 2.. Bobbin 2 a... Groove 3.. Terminal fitting 4.. Conductor 31.. Main body part 31 A ... First latch part 31 B ... Second latch part 32 ... Support part 32A・ Welding piece 32B ・ ・ Welding ball 33 ・ ・ Base part 33A ・ ・ Wire stopper 34 ・ ・ Position control part

Claims (9)

It is a method of connecting a wire to a connecting portion of a terminal fitting, and the connecting portion is constituted by a connecting wire equivalent portion in a state before connecting,
A main body portion extending from the housing in the direction in which the wire is pulled out and having a base portion for supporting the wire; a support portion extending from the main body portion in a direction crossing the extending direction of the main body portion; and the support portion A preparation step of preparing the connecting wire equivalent portion comprising a weld piece extending in the wire drawing direction from
A wire placement step of placing the wire on the base portion so as to follow the extending direction of the main body portion;
A welding piece close-contact arrangement step of closely contacting and superimposing the weld piece and the wire;
The portion where the wire and the weld piece are in close contact and overlapping is welded to form a weld ball on the support portion, and at the same time, the wire located on the opposite side of the housing from the weld ball is removed from the weld ball. And a connecting method for connecting the coil component.   The connection processing step includes an irradiation step of irradiating the welding piece and the wire with laser light, the focal diameter of the laser light is configured to be larger than the width of the welding piece in the drawing direction, and the laser light is Irradiating the weld piece and the wire extending from the weld piece to the side of the rod, and the center of the focal point being located downstream from the width center of the weld piece in the wire drawing direction. The method for connecting coil parts according to claim 1, wherein:   The method of connecting coil parts according to claim 1, wherein the welding piece contact and placement step includes a clamping step of clamping the wire by the support portion and the base portion. .   4. The welding piece close placement step includes a spraying step in which air flowing in a direction from the wire toward the weld piece is applied to the wire and the wire is brought into close contact with the weld piece. The coil component connecting method according to any one of the above.   The method of connecting coil parts according to any one of claims 1 to 4, wherein, in the preparation step, the weld piece is configured to be thinner than the support portion.   In the wire arranging step, after forming a first latching portion for latching the wire on a part of the outer peripheral surface on the upstream side in the wire drawing direction from the weld piece, the wire placing step is downstream in the wire drawing direction from the weld piece. The coil component according to any one of claims 1 to 5, further comprising a latching step of forming a second latching portion for latching the wire to a part of the outer peripheral surface of the main body portion on the side. Connection method.   The coil component connecting method according to claim 6, further comprising a removing step of removing the second hooking portion after the connecting processing step. A connection section;
A wire connected to the connecting portion, and
The connecting portion extends from the housing of the electronic component in a direction in which the wire is pulled out, and extends from one side edge of the extending direction of the connecting portion main body in a direction crossing the extending direction. A support part, a base part that extends from the other side edge of the main body part in the extending direction in a direction intersecting the extending direction and carries the drawn wire, and is integrally supported by the supporting part And a connecting portion that is welded to the wire to form a weld ball shape,
The support portion has a front end portion and a rear end portion in the wire drawing direction, the connection portion is located at the front end portion of the support portion, and the base portion is a surface that carries the wire at the front end portion. A coil component connection structure comprising a wire stopper erected toward the side.   The wire structure for a coil component according to claim 8, wherein the wire has a wire diameter of 100 µm or less.

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