JP2005197378A - Coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil wherein a lead that has high rigidity and can be easily routed is formed by a lead wire led from a winding part. <P>SOLUTION: A covered lead wire 3 extending from the winding part 2 of a coil 1 is folded forward and backward, and it is bundled flat and is fixed to form a lead 10. A soldered connector 12 is formed at a tip of the lead 10, and a soldered base end connector 13 is formed at a base. The base end connector 13 is soldered to a land 21 on a panel 20, so that the lead 10 can be led out to the outside. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a coil in which a lead portion formed of a coated conducting wire extending from a winding portion has a predetermined rigidity so that the lead portion can be easily routed.

  Conventionally, a coil is used by being mounted on a circuit board in various electronic devices, or is incorporated in a speaker or an actuator. Coils include an air-core structure in which only a coated conductor is wound, and a coil in which a coated conductor is wound around a bobbin.

  In the conventional coil, a winding portion is formed with a coated conductor, and the leading end portion of the conductor drawn from the winding portion is used as a land portion formed on a circuit board or a terminal provided on the circuit board. Soldering. Furthermore, when wiring from the circuit board or the like to the outside, the end of the flexible cable is soldered to another land portion that is conductive to the land portion, or the end of the flexible cable is soldered to the terminal, and this flexible cable is connected to the outside. The structure of pulling out is adopted.

Patent Document 1 below discloses a structure in which a wire is twisted and covered with a tube.
Utility model registration No. 3092944

  As described above, in the wiring structure in which the coated conductor drawn from the coil is soldered to a land portion or a terminal, and the flexible cable is provided outside by using the land portion or the terminal as a relay, Since it is necessary, the number of parts increases. At the same time, since it is necessary to solder both the coil-coated conductor and the flexible cable to the relay portion such as the land portion and the terminal, the wiring work becomes complicated.

  Moreover, in the device described in Patent Document 1, the strength of the lead portion is increased by twisting the conducting wire and covering the tube. However, the operation of covering the tube is complicated with manpower, and no invention is disclosed in which this lead portion is pulled out, for example, toward the outside of the circuit board.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a coil that can lead out a lead portion from a coil and can also be pulled out outside via a land portion. Yes.

The present invention relates to a coil having a winding part formed by winding with a coated conductor, and a lead part in which the coated conductor extends from the wound part,
In the lead portion, a plurality of line portions located between the folding point and the folding point are formed on the same coated conductive wire by bending the same coated conductive wire back and forth multiple times, and each line portion is bundled to The wire portions are fixed to each other, and at the tip portion or the vicinity thereof away from the winding portion of the lead portion, the covering of the covered conductor is removed to form a connection portion. .

  This coil forms a lead portion by stacking and bundling a plurality of wire portions of a coated conductor extending from a winding portion, and fixing the plurality of wire portions to each other. Therefore, the rigidity of the lead portion can be increased, and the lead portion can be handled in the same manner as the flexible cable and pulled out to the outside.

  For example, in the present invention, in the connection portion, the plurality of line portions are joined to each other with molten metal in a state where the coating is removed.

  For example, when the wire portions are joined with solder, which is a molten metal, the connecting portion can be easily formed.

  Similarly, at the proximal end of the lead portion closer to the winding portion, a plurality of the wire portions are joined to each other via a molten metal to form a proximal end connection portion. Even at the base portion, the line portions can be easily joined.

  In this case, the base end connecting portion of the lead portion can be fixed to the relay portion with molten metal, and the lead portion can be pulled out in a state of being fixed to the relay portion.

  As described above, when the base end connection portion is fixed to the relay portion such as the land portion or the terminal with solder or the like, the lead portion can be stably pulled out with the base end fixed.

  Further, in the lead portion, the covering conductor coverings forming the wire portion may be fused to each other.

  The coil is usually formed by a very thin coated conductor, and the single coated conductor drawn from the winding portion is thin and easily deformed. However, in the present invention, since the lead wires are formed by bundling and fixing the coated conductors, the rigidity of the lead portions can be increased, and it can be handled and wired to the outside in the same manner as a flexible cable.

  1 and 2 are end views showing a process of forming a lead portion of the coil 1 according to the first embodiment of the present invention. FIG. 3 is a perspective view showing an example of a lead-out structure when the coil is mounted.

  A coil 1 shown in FIGS. 1 and 2 is an air-core coil having no bobbin, and is formed by a very thin coated conductor 3. The coated conductive wire 3 is obtained by coating the surface of a low-resistance metal conductive wire such as copper with an insulating resin.

  The winding part 2 is wound in a cylindrical shape or a rectangular tube shape by the covered conducting wire 3. In the case of an air-core coil, the covered conductors 3 are bonded to each other at the winding part 2 with an adhesive. Alternatively, when the outermost surface of the insulation coating of the coated conductor 3 is a heat-sealing layer, the heat-sealing layers are bonded together by heat to keep the shape of the winding part 2.

  On the winding start end side and the winding end side of the winding part 2, the covered conducting wire 3 is extended to the outside of the winding part 2 to form lead parts 4 and 4. In this embodiment, lead portions 10 and 10 having a predetermined length as shown in FIG. 2 are formed by the covered conducting wires 3 of the lead portions 4 and 4. Since the paired lead portions 10 and 10 have the same structure, only one lead portion 10 will be described below.

  As shown in FIG. 1, in the lead-out portion 4, the coated conductor 3 is folded back and forth at folding points 5 a, 5 b, 5 c, 5 d, and so on, and at this time, a line located between the folding points The portions 6a, 6b, 6c, 6d,... Are folded back so that the lengths are aligned with each other.

  2, the line portions 6a, 6b, 6c, 6d,... Are aligned and bundled, and the line portions 6a, 6b, 6c, 6d,. The The fixing of the wire portions 6a, 6b, 6c, 6d,... Is performed by removing the insulation coating of the covered conductor 3 of each wire portion 6a, 6b, 6c, 6d,. Then, the conductive wires are joined to each other with solder, which is a molten metal, and the insulation of the covered conductive wire that forms the wire portions 6a, 6b, 6c, 6d,. Is removed and soldered together.

  As a result, a connecting portion 12 by solder coating is formed at the distal end of the lead portion 10, and a proximal end connecting portion 13 by solder coating is formed at the base portion of the lead portion 10.

  In the intermediate portion 11 between the connecting portion 12 and the base end connecting portion 13, the line portions 6a, 6b, 6c, 6d,... Are preferably joined to each other partially or over the entire length. The coated conductor 3 has an insulating coating on the surface of the metal conductor, but the outermost surface of this insulating coating is provided with a heat-sealed portion made of a heat-fusible resin such as polyethylene. Can join the wire portions 6a, 6b, 6c, 6d,... To each other by the heat-seal force of the heat-sealable resin. Or you may join each line part with an adhesive agent.

  In the intermediate portion 11, each line portion may be bundled so that the cross section of the bundle is substantially circular. However, in the intermediate portion 11, each line portion is in a flat state, that is, the cross section of the bundle is rectangular. It is preferable that the line portions are joined together. When the intermediate portion 11 is in a flat state, the lead portion 10 can be handled and wired in the same manner as a flat cable.

  FIG. 3 shows a state where the coil 1 is mounted on a panel 20 such as a circuit board. The winding part 2 of the coil 1 is bonded and fixed to the surface of the panel 20 via an adhesive or the like. The panel 20 is formed with land portions 21 and 21 formed of electrically conductive layers that are electrically independent from each other as a relay portion. The base end connection portions 13 and 13 of the lead portion 10 are fixed to the land portions 21 and 21 by soldering individually. The lead portions 10 and 10 are pulled out to the outside with their base ends firmly fixed on the panel 20, and the connecting portions 12 and 12 at the tips of the lead portions 10 and 10 are connected to an external electric circuit or the like. Is done.

  Therefore, even if an external force is applied to the lead portions 10 and 10 during wiring, disconnection at the lead portion 4 of the coil 1 can be prevented. Moreover, in the lead part 10, since several line parts are mutually fixed, rigidity can be improved and the disconnection at the time of the routing can also be prevented now.

  In addition, when the coil 1 is attached to a mechanism part other than the panel of the circuit board, the base end connection parts 13 and 13 of the lead part 10 may be configured to be connected to the relay terminal as a relay part. It is.

FIG. 4 is a perspective view showing a coil 100 according to the second embodiment of the present invention.
The winding portion 102 of the coil 100 is wound in a cylindrical shape by the covered conducting wire 3. The winding section 102 is used as an actuator for a speaker or other drive device.

  From the winding portion 102, there are provided lead portions 4 and 4 from which the coated conducting wire 3 is drawn. FIG. 4 shows a process in which the lead portion 10 is formed by one lead portion 4, but the structure of the other lead portion 4 is the same.

  In this embodiment, the covered conducting wire 3 of the lead-out portion 4 is wound around a plurality of strips on the peripheral surface of a jig such as a cylinder, an ellipse, or an ellipse. After winding a predetermined number of times, the jig is removed and the wound part is crushed flat. This also makes it possible to form a plurality of folding points and a line portion positioned between the folding points, and to form a flat lead portion 10 similar to that shown in FIGS. The structure for forming the lead part 10 is the same as that of the first embodiment.

  In each of the above embodiments, the air-core coil has been described as an example. However, a coil in which a conducting wire is wound around the bobbin may be used. In this case, it is also possible to solder the base end connection portion 13 of the lead portion 10 to a relay terminal or a land portion provided on the bobbin.

The end view of the coil of the 1st embodiment of the present invention, An end view showing a state in which a lead portion is formed in the lead portion of the coil, The perspective view which shows the state in which the said coil was mounted in the panel, The perspective view which shows the coil of the 2nd Embodiment of this invention,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100 Coil 2,102 Winding part 3 Coated conducting wire 4 Lead-out part 10 Lead part 11 Intermediate part 12 Connection part 13 Base end connection part 20 Panel 21 Land part

Claims (5)

In a coil having a winding part formed by winding with a coated conductor and a lead part in which the coated conductor extends from the wound part,
In the lead portion, a plurality of line portions located between the folding point and the folding point are formed on the same coated conductive wire by bending the same coated conductive wire back and forth multiple times, and each line portion is bundled to A coil, wherein wire portions are fixed, and a connecting portion is formed by removing the covering of the covered conductor at or near the tip portion of the lead portion away from the winding portion.   2. The coil according to claim 1, wherein a plurality of the wire portions are joined to each other by molten metal in the connection portion in a state where the coating is removed.   3. The coil according to claim 1, wherein a plurality of the wire portions are joined to each other through a molten metal at a proximal end of the lead portion close to the winding portion, to form a proximal end connection portion.   The coil according to claim 3, wherein the base end connection portion of the lead portion is fixed to the relay portion with molten metal, and the lead portion is pulled out in a state of being fixed to the relay portion.   The coil according to any one of claims 1 to 4, wherein in the lead portion, the coverings of the covered conductors forming the wire portion are fused to each other.

Images