JPH06275446A - Bobbin terminal and coil device with bobbin terminal - Google Patents

Abstract

PURPOSE:To connect an extraction wire of a coil to a bobbin terminal easily and surely by locating the extraction wire of the coil of a coil device at a supporting section of a bobbin terminal and holding the extraction wire by bending an extraction wire holding section of the bobbin terminal and then by connecting the extraction wire holding section of the bobbin terminal and the extraction wire of the coil electrically. CONSTITUTION:This device is provided with a supporting section 11 which supports an extraction wire, a pair of extraction wire holding sections 12 which are so formed as to project on both sides of the supporting section 11 in the width direction, and a lead electrode section 13 which is extended from one end 11a of the supporting section 11 and is formed narrower than the supporting section 11. It also has a burried section 14 which, being formed narrower than the supporting section, is extended from the other end 11b of the supporting section 11 and is to be burried in a flange of a resin-made bobbin. This bobbin terminal 10 is made monobloc from conductive and flexible metal material by insert molding or press punching. Therefore, the extraction wire can be easily and surely connected to the bobbin terminal and the number of assemblies of the coil device can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin terminal capable of easily and surely connecting a lead wire of a coil of a coil device and a coil device with a bobbin terminal using the bobbin terminal.

[0002]

2. Description of the Related Art A coil device such as a transformer and a reactor which has been widely used in the past has a cavity 3c into which a core 6 is inserted and a pair of flanges 3a and 3b, as shown in the transformer of FIGS. A bobbin 3 made of resin,
The primary winding 1 and the secondary windings 2 and 2'wound between the pair of flanges 3a and 3b of the bobbin 3, and the flange 3 of the bobbin 3.
a plurality of recesses 3d formed in a, and lead lines 1a, 2a, 2b of primary and secondary windings 2 and 2'fixed near the plurality of recesses 3d and drawn out from the plurality of recesses 3d, 2c, 2d
And a pin-shaped bobbin terminal 7 for electrically connecting Each of the primary winding 1 and the secondary windings 2 and 2'used in this transformer is, for example, a wire conductor 4 provided with a triple insulating layer 5 on the outer periphery thereof as shown in FIG. The insulating layer 5 includes a first layer 5a that adheres to the linear conductor 4 and a first layer 5a.
Has a second layer 5b coated thereon and a third layer 5c coated on the second layer 5b. The primary winding 1 and the secondary winding 2 are wound in the order of the primary winding 1, the secondary winding 2 and 2'over the entire space between the pair of flanges 3a and 3b of the bobbin 3,
It is attached to the core 6. As shown in FIGS. 6 and 7,
Each lead wire 1a, 2a, 2b, 2c, 2d of the primary winding 1 and the secondary winding 2, 2'of this transformer has a pin shape fixed near a plurality of recesses 3d of the flange 3a of the bobbin 3. Each bobbin terminal 7 is wound around and fixed with solder or the like.

[0003]

In the above transformer, the lead wires 1a, 2a, 2b, 2c, 2d of the primary winding 1 and the secondary windings 2 and 2'and the pin-shaped bobbin terminal 7 are provided.
In order to ensure the electrical connection of the lead wire 1a, 2a, 2b, 2c, 2d of the primary winding 1 and the secondary winding 2, 2 ', each is wound around a pin-shaped bobbin terminal 7 and soldered. Since they are fixed by attachment or the like, there are drawbacks such that the assembling work becomes complicated and the number of assembling steps increases. These drawbacks are not preferable from the viewpoint of cost reduction.

Therefore, an object of the present invention is to provide a bobbin terminal capable of easily and surely connecting a lead wire of a winding wire of a coil device and a coil device with a bobbin terminal using the bobbin terminal.

[0005]

A bobbin terminal according to the present invention comprises a support portion for supporting a lead wire, a lead wire holding portion projecting in the width direction of the support portion, and a length direction of the support portion. A lead electrode portion extending from one end of the support portion and narrower than the support portion, and a resin bobbin extending from the other end in the length direction of the support portion and narrower than the support portion. And an embedded portion embedded in the flange of, and is integrally formed of a conductive and flexible metal material. In the illustrated embodiment, the lead wire temporary fixing portion is provided in parallel with the lead wire holding portion and is formed to project in the width direction of the support portion, and is formed to project in the width direction of the embedded portion. Equipped with a stopper.

Further, the coil device with bobbin terminals according to the present invention comprises a resin bobbin having a cavity for inserting a core and a pair of flanges, a winding wound between the pair of flanges of the bobbin, and A plurality of recesses formed on one of the flanges of the bobbin, and a bobbin terminal that is electrically connected to the lead wire of the winding fixed in the vicinity of the plurality of recesses and drawn from the plurality of recesses, The bobbin terminal includes a support portion that supports the lead wire of the winding wire, a lead wire holding portion that is formed to project in the width direction of the support portion, and extends from one end in the length direction of the support portion and A lead electrode portion formed to be narrower than the support portion, and extending from the other end in the length direction of the support portion, formed to be narrower than the support portion, and embedded in one flange of the bobbin. And an embedded portion.

[0007]

[Function] After the lead wire of the winding of the coil device pulled out from the flange of the resin bobbin is arranged on the support portion of the bobbin terminal, the lead wire holding portion is bent inward in the width direction of the support portion and the lead wire is held. By electrically connecting the lead wire holding portion of the bobbin terminal and the lead wire of the winding by welding, soldering or the like, the lead wire of the winding of the coil device can be easily and surely connected to the bobbin terminal.

[0008]

Embodiments of the present invention will be described below with reference to FIGS. However, in these drawings, the same parts as those shown in FIGS. 5 to 7 are designated by the same reference numerals, and the description thereof will be omitted. As shown in FIG. 1 (A), the bobbin terminal 10 according to the present invention includes a support portion 11 for supporting a lead wire and a support portion 1.
1, a pair of lead wire holding portions 12 formed so as to project to both sides in the width direction, a lead electrode portion 13 extending from one end 11a of the support portion 11 and formed narrower than the support portion 11, The embedded portion 14 extends from the other end 11b, is narrower than the support portion 11, and is embedded in the flange of the resin bobbin. The support portion 11 is provided with a pair of lead wire temporary fixing portions 15 which are arranged in parallel to the pair of lead wire holding portions 12 in the length direction thereof and project to both sides in the width direction of the support portion 11. A pair of retaining projections 16 is formed on the base 14 so as to protrude on both sides in the width direction. The width dimension of the lead electrode portion 13 is actually slightly smaller than the diameter of the through hole of the printed wiring board. Therefore, for example, when the lead electrode portion 13 is inserted into the through hole of the printed wiring board, one end 11a of the support portion 11 is
Since the through-hole engaging portion 11c formed on the contact surface abuts on the surface of the through-hole, it is possible to prevent excessive solder rising onto the bobbin terminal 10 during solder dipping. A locking portion 11d is formed on the other end 11b of the support portion 11, and the embedding portion 14 is embedded in the flange of the bobbin so that the bobbin terminal 1
When 0 is fixed, the bobbin terminal 10 is prevented from slipping into the bobbin flange more than necessary. Also, the embedded part 1
It is possible to prevent the bobbin terminal 10 from falling off by the pair of retaining protrusions 16 of 4. The bobbin terminal 10 is manufactured by integrally molding a metallic material having conductivity and flexibility, for example, a tin-plated phosphor bronze plate by insert molding or press punching. The pair of lead wire holding portions 12 and the pair of lead wire temporary fixing portions 15 are each bent into a C shape by a press or the like as shown in FIG. 1 (B).

As shown in FIGS. 2 and 3, the coil device with bobbin terminals according to the present invention includes a resin bobbin 3 having a cavity 3c into which a core (not shown) is inserted and a pair of flanges 3a and 3b. A pair of flanges 3a of the bobbin 3,
First and second windings 1, 2, 2'wound between 3b,
2 ″, a plurality of recesses 3d formed in the flange 3a of the bobbin 3, and first and second windings 1 and 2 fixed to the vicinity of the plurality of recesses 3d and drawn out from the plurality of recesses 3d,
The bobbin terminal 10 electrically connects the lead wires 1a, 1b, 2a to 2f of 2'and 2 '.
Has the shape shown in FIG. In this embodiment, the lead wires 2b and 2c and the lead wires 2d and 2e are electrically connected to the same bobbin terminal 10 as a set. For each of the first and second windings 1, 2, 2 ′ and 2 ″, a coated conductor wire in which a triple insulating layer 5 is applied to the outer periphery of the linear conductor 4 shown in FIG. The fixing of the terminal 10 to the flange 3a of the bobbin 3 is performed by press-fitting the embedding portion 14 of the bobbin terminal 10 shown in FIG. 1 into holes preliminarily formed in the vicinity of the plurality of recesses 3d of the flange 3a. Be seen.

When connecting the lead wires 1a, 1b, 2a to 2f of the first and second windings 1, 2, 2 ', 2 "to the bobbin terminal 10, as shown in FIG. 4 (A). The lead wires 1a, 1b, 2a to 2f of the first and second windings 1, 2, 2'and 2 "are respectively arranged on the support portion 11 of the bobbin terminal 10. At this time, the pair of lead wire holding portions 12 and the pair of lead wire temporary fixing portions 15 of the bobbin terminal 10 are preliminarily bent into a C shape and fixed in advance in the vicinity of the plurality of recesses 3d of the flange 3a of the bobbin 3. Further, the leading ends of the respective lead lines 1a, 1b, 2a to 2f slightly project from the one end 11a of the support portion 11. Subsequently, as shown in FIG. 4B, the lead wire temporary fixing portions 15 of the bobbin terminal 10 are further bent inward in the width direction of the support portion 11 to temporarily fix the lead wires 1a, 1b, 2a to 2f. . After temporarily fixing the respective lead wires 1a, 1b, 2a to 2f, as shown in FIG. 4 (C), the pair of lead wire holding portions 12 of the bobbin terminal 10 are further bent inward in the width direction of the support portion 11 to bring out the respective lead wires. Line 1a, 1
b Hold 2a to 2f. Next, as shown in FIG. 4 (D), each lead wire 1a protruding from one end 11a of the support portion 11,
Cut 1b, 2a-2f. Finally, as shown in FIG. 4 (E), the pair of lead wire holding portions 12 of the bobbin terminal 10 is spot-welded to form the first and second windings 1, 2,
Each of the lead wires 1a, 1b, 2a to 2f of 2 ', 2 "is electrically connected to the bobbin terminal 10. At this time, each lead wire 1a,
Since the insulating coatings at the tips of 1b, 2a to 2f are melted by the heat generated during spot welding, the lead wires 1a, 1b,
Electrical connection to the bobbin terminals 10 of 2a to 2f can be surely made.

As described above, in this embodiment, the first and second recesses 3d of the flange 3a of the bobbin 3 are drawn out.
Each of the lead wires 1a, 1b, 2a of the windings 1, 2, 2 ', 2 "of
2f is arranged on the support portion 11 of the bobbin terminal 10, and the pair of lead wire holding portions 12 are bent inward in the width direction of the support portion 11 to hold the lead wires 1a, 1b, 2a to 2f, and then the bobbin terminal 10 Since the pair of lead wire holding portions 12 and the lead wires 1a, 1b, 2a to 2f of the first and second windings 1, 2, 2 ', 2 "are electrically connected by spot welding, the coil Leader 1 of each of the first and second windings 1, 2, 2 ', 2 "of the device
The a, 1b, 2a to 2f can be connected to the bobbin terminal 10 easily and reliably. Further, since the pair of lead wire temporary fixing portions 15 of the bobbin terminal 10 are bent inward in the width direction of the support portion 11 to temporarily fix the respective lead wires 1a, 1b, 2a to 2f, each lead wire 1a,
1b, 2a-2f can be connected to the bobbin terminal 10 more reliably.

The embodiment of the present invention is not limited to the above-mentioned embodiments, and can be modified. For example, in the above-mentioned embodiment, the leader wire holding portion 12 and the leader wire temporary fixing portion 15 are respectively provided in the support portion 1.
Although the example in which the lead wire holding portion 12 and the lead wire temporary fixing portion 15 are formed to project to both sides in the width direction of 1 may be formed to project to one side in the width direction of the support portion 11, respectively. In addition, the lead wires 1a, 1b, 2 of the first and second windings 1, 2, 2 ', 2 "
Before arranging a to 2f on the support portion 11 of the bobbin terminal 10, the insulating coatings on the tips of the lead wires 1a, 1b, and 2a to 2f may be peeled off in advance. In addition, the bobbin terminal 10
A pair of lead wire holding portions 12 and the first and second windings 1,
The lead wires 1a, 1b, 2a to 2f of 2, 2 ', 2 "may be connected by soldering. The secondary windings 2, 2',
Each of the 2 "lead wires 2b, 2c, 2d, 2e may be connected to different bobbin terminals 10. Also, the insulating coating of the insulating coating wire used as the winding is limited to the triple structure shown in FIG. Not done.

[0013]

As described above, according to the present invention, the lead wire of the winding wire of the coil device can be easily and surely connected to the bobbin terminal, so that the number of assembling steps of the coil device can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a plan view of a bobbin terminal showing an embodiment of the present invention.

FIG. 2 is a front view of a coil device with a bobbin terminal showing an embodiment of the present invention.

FIG. 3 is a wiring diagram of each winding of the coil device of FIG.

FIG. 4 is a perspective view showing a process of connecting a lead wire of each winding of the coil device of FIG. 2 to a bobbin terminal.

FIG. 5 is a sectional view showing a transformer as a conventional coil device.

FIG. 6 is a front view showing a drawn state of a winding of a transformer in which the core of FIG. 5 is omitted.

7 is a side view of FIG.

FIG. 8 is a perspective view of a coated wire having a triple insulating layer.

[Explanation of symbols]

1. ． ． Primary winding, 2, 2 ', 2 "... Secondary winding, 1
a, 1b. ． ． Lead wire of primary winding, 2a to 2f. ． ． Lead wire of secondary winding, 3. ． ． Resin bobbins 3a, 3b. ． ．
Flange, 3c. ． ． Cavity, 3d. ． ． Multiple recesses,
4. ． ． Conductor, 5. ． ． Triple insulating layer, 6. ． ． core,
7. ． ． Pin-shaped bobbin terminal, 10. ． ． Bobbin terminal, 11. ． ． Support, 11a. ． ． One end of the support, 1
1b. ． ． The other end of the support, 11c. ． ． Through-hole locking part, 11d. ． ． Locking part, 12. ． ． Leader holding part, 1
3. ． ． Lead electrode portion, 14. ． ． Embedded part, 15. ． ．
Leader wire temporary fixing part, 16. ． ． Retaining protrusion

Claims (4)

[Claims] 1. A support portion for supporting a lead wire, a lead wire holding portion formed so as to project in the width direction of the support portion, and a width extending from one end of the support portion in the length direction and wider than the support portion. A lead electrode portion formed narrowly, and an embedded portion extending from the other end in the length direction of the support portion and formed to be narrower than the support portion and embedded in the flange of the resin bobbin. A bobbin terminal, which is integrally formed of a metal material having conductivity and flexibility. 2. The bobbin terminal according to claim 1, further comprising a lead wire temporary fixing portion formed in parallel with the lead wire holding portion and protruding in the width direction of the support portion. 3. The bobbin terminal according to claim 1, further comprising a retaining projection formed so as to project in the width direction of the embedded portion. 4. A resin bobbin having a cavity for inserting a core and a pair of flanges, a winding wound between the pair of flanges of the bobbin, and a plurality of windings formed on one of the flanges of the bobbin. A bobbin terminal-equipped coil device fixedly provided in the vicinity of the plurality of recesses and electrically connecting lead wires of the windings drawn out from the plurality of recesses. Is a support portion that supports the lead wire of the winding wire, a lead wire holding portion that is formed to project in the width direction of the support portion, and extends from one end of the support portion in the length direction and A lead electrode portion formed to have a narrow width, and an embedded portion extending from the other end in the length direction of the support portion and formed narrower than the support portion and embedded in one flange of the bobbin. And comprising With a bottle terminal coil apparatus.