JP6541542B2 - Winding parts - Google Patents

Description

  The present invention relates to pin-mounted wire-wound components such as horizontal type transformers and coils.

  In a transformer used for a power supply module or the like, it is necessary to secure a certain distance in order to satisfy the insulation performance between the windings or between the windings and the core.

  FIGS. 7 to 9 show a bobbin in a conventional horizontal ER type transformer, and this bobbin 10 is a terminal mounting portion at flanges 11a of both ends in the axial direction of a cylindrical winding portion 11 to which a winding is applied. A plurality of (six in the drawing) terminals 13 are embedded in one row at equal intervals in the direction orthogonal to the above axis, and are formed integrally with the terminal mounting portion 12. A guide groove 15 into which the lead wire 14 of the winding wound around the terminal 13 is inserted is formed to extend in the axial direction.

  In the horizontal ER type transformer using the bobbin 10 having the above configuration, as shown in FIG. 10, the outer leg 16 of the core extends along the axial direction in the outside of the winding wound around the winding portion 11 Are arranged. Incidentally, in this transformer, the inner surface of the outer foot 16 is formed in an arc shape in cross section along the outer periphery of the winding.

  For this reason, in the lead wire 14 of the winding, in particular, the predetermined insulation performance is established between the lead wire 14 inserted in the guide groove 15 (15a) closest to the outer foot 16 of the core and the outer foot 16 of the core. In many cases, it is difficult to secure a spatial distance for obtaining the above, and in such a case, there has been a problem that the lead wire 14 has to be insulated and protected by a tape or a tube.

As a result, there is a problem that the work requires much time and labor and is not economical.
A similar configuration of the transformer is also disclosed in Patent Document 1 below.

JP-A-8-264348

  The present invention has been made in view of the above circumstances, and it is possible to secure insulation performance without separately performing insulation protection with a tape or the like even if the insulation specification is not possible with the conventional bobbin shape. It is an object of the present invention to provide a winding part which is easy to assemble and which can realize higher quality.

  In order to solve the above-mentioned subject, in the invention according to claim 1, the terminal mounting part is formed in one at the end of the direction of an axis of a bobbin by which winding was given to winding part. The terminal of the book is implanted at a distance in the direction orthogonal to the axis, and a guide groove extending in the axial direction is formed between the terminals, and the lead wire of the winding wound around the terminal Is a winding component in which the core is disposed along the axial direction outside the winding while being inserted into the guiding groove, the bottom surface of the guiding groove having the shortest distance to the core, At a position close to the wall surface on the axis line side in the guide groove, a protrusion whose outer surface is formed into a three-dimensional convex curved surface is formed, and a groove where the lead wire is guided is formed on the wall surface facing the protrusion. It is characterized in that it is formed.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the winding component is a transformer, and the lead wire is a lead wire to be wound on the high voltage side terminal. It is said that.

  Furthermore, in the invention according to claim 3, in the invention according to claim 1 or 2, the winding is a litz wire obtained by twisting 5 to 30 thin wires of 0.1 to 0.2 mm in diameter. It is a feature.

  According to the invention as set forth in any one of claims 1 to 3, in the bottom surface of the guide groove of the terminal mounting portion, a protrusion whose outer surface is formed in a three-dimensional convex curved surface is close to the wall on the axis line side of the guide groove. In addition to the groove formed on the wall surface opposite to the protrusion, the lead wire is formed in the position, and the groove is inserted into the guide groove between the winding portion of the bobbin and the terminal. The lead wire of the winding can be guided along the three-dimensional convex curved surface of the protrusion to the wall side in the direction away from the core and inserted into the groove formed in the wall surface.

  As a result, compared with the case where the lead wire is simply inserted into the guide groove, a large insulation distance between the lead wire and the core can be secured, and hence the insulation specification is impossible in the conventional bobbin shape. Also, the insulation performance can be secured without separately performing insulation protection with a tape or the like. In addition, it is easy to assemble, and it is possible to realize higher quality.

  In particular, as in the invention according to claim 2, in the case where the winding component is a transformer and the lead wire is a lead wire which can be wound on a terminal on the high voltage side, between the lead wire and the core A significant effect can be obtained because a larger insulation distance can be secured.

  Furthermore, since the outer surface of the protrusion is formed by a three-dimensional convex curved surface, when wiring between the winding portion of the bobbin and the terminal, the lead wire is not unreasonable along the three-dimensional convex curved surface It can guide automatically to the optimal and shortest route.

  In addition, since the projection does not have an edge portion for locally bending the lead wire, as in the invention according to claim 3, the thin wire of 0.1 to 0.2 mmφ is used as the winding. Even in the case of using a litz wire in which 30 to 30 strands are combined, it is possible to reliably prevent an adverse effect such as breakage of a thin wire located on the outer periphery due to excessive bending in the edge portion or the like.

It is a front view which shows the bobbin shape in one Embodiment of this invention. It is the sectional view on the AA line of FIG. It is an enlarged view of the principal part of FIG. It is a BB sectional view taken on the line of FIG. It is a perspective view of FIG. It is sectional drawing which shows the state which has arrange | positioned the leader line and core of winding to the bobbin of FIG. The bobbin shape in the conventional horizontal ER type transformer is shown, (a) is a side view, (b) is a front view, (c) is a top view. It is CC sectional view taken on the line of FIG.7 (b). It is a perspective view of FIG. It is sectional drawing which shows the state which has arrange | positioned the leader line and core of winding to the bobbin of FIG.

FIGS. 1 to 6 show an embodiment in which the winding parts according to the present invention are applied to the conventional horizontal ER type transformer shown in FIGS. 7 to 10, and the same components as the above-mentioned conventional transformer are shown. The same symbol is attached to simplify the description.
The difference between this transformer and the conventional one is in the shape of the guide groove 15 through which the lead wire 14 is inserted.

  That is, in the bobbin 1 of this transformer, a guide through which the lead wire 14 to be twisted around the two guide grooves 15 closest to the core 16, that is, the terminals 13 at both ends of the terminals 13 arranged in a row is inserted. The protrusions 2 are formed on the bottom of the groove 15 respectively.

  The protrusion 2 is formed in a hemispherical shape in which the outer surface is a hemispherical surface (three-dimensional convex curved surface), and is an end of the bottom surface of the guide groove 15 on the winding portion 11 side. It is formed at a position close to the wall surface 4 on the axial line side of the bobbin 1.

  And the groove part 3 by which the lead-out wire 14 is penetrated is formed in the position which opposes the projection part 2 of this wall surface 4. The groove 3 is a groove which is open at the projection 2 side and the end face 12 a of the terminal mounting part 12 at the winding part 11 side, and the depth dimension gradually increases from the inside of the guide groove 15 toward the end face 12 a. It is formed to be inclined.

  Thus, the lead wire 14 at the winding start side of the winding is inserted from the terminal 13 into the guide groove 15, and the projection 2 is guided to the wall 4 side to guide the groove 3 to the winding 11 of the bobbin 1. It is done. Further, the lead wire 14 on the winding end side of the winding is inserted from the winding portion 11 into the groove portion 3, and the upper portion of the protrusion 2 is guided into the guide groove 15 and wound around the terminal 13.

  By the way, in the present embodiment, a litz wire in which 5 to 30 thin wires of 0.1 to 0.2 mmφ are twisted is used as the winding.

  According to the transformer having the above configuration, the projection 2 having a hemispherical surface is formed on the bottom surface of the guide groove 15 of the terminal mounting portion 12 at a position close to the wall surface 4 on the axis line side of the guide groove 15 The groove portion 3 to which the lead wire 14 is guided is formed on the wall surface 4 opposed to the projection portion 2, so that the groove portion 3 is inserted into the guide groove 15 between the winding portion 11 and the terminal 13 of the bobbin 1 The lead wire 14 of the winding can be guided along the hemispherical surface of the protrusion 2 in a direction away from the core 16 and inserted into the groove 3 formed in the wall surface 4.

  As a result, compared with the case where the lead wire 14 is simply inserted into the guide groove 15, a large insulation distance between the lead wire 14 and the core 16 can be secured, and thus insulation not possible with the conventional bobbin shape. Even with the specifications, the insulation performance can be secured without separately performing insulation protection with a tape or the like. In addition, it is easy to assemble, and it is possible to realize higher quality.

  And since the outer surface of the projection part 2 is formed by the hemispherical surface, when wiring between the winding part 11 of the bobbin 1 and the terminal 13, the lead wire 14 is along the hemispherical surface of the projection part 2. It is possible to automatically guide to an optimal and shortest route without hesitation.

  In addition, since the protrusion 2 does not have an edge portion for locally bending the lead wire 14, a litz wire in which 5 to 30 thin wires of 0.1 to 0.2 mm in diameter are twisted is used as the winding. Even in such a case, it is possible to reliably prevent the occurrence of an adverse effect such as breakage of the thin wire positioned on the outer periphery due to excessive bending in the edge portion or the like.

  In the above embodiment, only the case where the winding component according to the present invention is applied to a horizontal ER type transformer has been described, but the present invention is not limited to this, and other windings such as choke coil etc. The same applies to line parts.

DESCRIPTION OF SYMBOLS 1 bobbin 2 protrusion part 3 groove part 4 wall surface 11 winding part 12 terminal mounting part 13 terminal 14 lead-out wire of 15 winding 15 guide groove 16 outer leg of core

Claims (3)

A terminal mounting portion is integrally formed at an end portion in the axial direction of the bobbin in which the winding portion is wound, and a plurality of terminals are spaced at intervals in a direction orthogonal to the axis at the terminal mounting portion. A guide groove extending in the axial direction is formed between the terminals while being provided, and a lead wire of the winding to be entangled in the terminal is inserted into the guide groove, and an outer side of the winding is formed. In a winding part in which the core is arranged along the axial direction,
A projection having an outer surface formed into a three-dimensional convex curved surface is formed on the bottom surface of the guide groove closest to the core and at a position close to the wall surface on the axis line side of the guide groove. A winding part characterized in that a groove part to which the lead wire is guided is formed on the wall surface facing the part.   The winding component according to claim 1, wherein the winding component is a transformer, and the lead-out wire is a lead-out wire that can be wound around the terminal on the high voltage side.   The winding part according to claim 1 or 2, wherein the winding is a litz wire obtained by twisting 5 to 30 thin wires of 0.1 to 0.2 mm in diameter.

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