JP2019161058A - Winding component - Google Patents

Abstract

To provide a winding component improving connection reliability between an end part of a winding and a terminal.SOLUTION: A winding component comprises: a winding core 2; a winding 3 wound to the winding core 2; and a terminal 4 to which an end part 3a of the winding 3 is electrically connected. The terminal 4 includes: a pedestal part 5 to which the end part 3a of the winding 3 is contacted; a first bending piece 6 bent opposite to the pedestal part 5; and an inclination part 8 making the end part 3a of the winding 3 contacted to the pedestal part 5 to be inclined to the side approaching the first bending piece 6. The end part 3a of the winding 3 is arranged along the inclination part 8 and is integrally combined to the terminal 4 in the state of being nipped between the pedestal part 5 and the first bending piece 6.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a winding component.

  Conventionally, there is a winding component in which a winding coil is wound around a winding core (see, for example, Patent Document 1 below). In such a winding component, it is possible to supply electric power from the outside through an electrode terminal electrically connected to the end of the winding coil.

JP 2017-195282 A

  By the way, in the winding component described above, the end of the winding coil and the electrode terminal are integrally joined by laser welding. Specifically, the electrode terminal is provided with a pedestal that is in contact with the end of the winding coil, and a bent piece that is bent so as to face the pedestal, and between the pedestal and the bent piece. The end of the winding coil is sandwiched. From this state, the ends of the winding coils are joined together with the bent pieces by laser welding.

  However, in the conventional winding component, a gap is generated between the end of the winding coil and the bent piece during the laser welding described above. In some cases, welding defects occurred.

  The present invention has been proposed in view of such conventional circumstances, and an object of the present invention is to provide a winding component in which the connection reliability between the end of the winding and the terminal is improved.

In order to achieve the above object, the present invention provides the following means.
[1] winding core,
A winding wound around the winding core;
A terminal to which an end of the winding is electrically connected;
The terminal includes a pedestal portion with which an end portion of the winding is in contact, a first bent piece that is bent to face the pedestal portion, and an end portion of the winding that is in contact with the pedestal portion. And an inclined portion that inclines toward the side closer to the first bent piece,
An end portion of the winding is disposed along the inclined portion and is integrally joined to the terminal in a state of being sandwiched between the pedestal portion and the first bent piece. Winding parts.
[2] The winding component according to [1], wherein the inclined portion is configured by a groove portion formed in the pedestal portion.
[3] The groove portion has a pair of inclined surfaces inclined in opposite directions to each other, and has a depth toward the tip end side of the end portion of the winding disposed between the pair of inclined surfaces. The winding part according to [2], wherein the winding part has a shape that gradually becomes shallower.
[4] The terminal includes a second bent piece that is positioned closer to the base end side of the end of the winding than the first bent piece and is bent to face the pedestal portion.
The winding according to any one of [1] to [3], wherein an end of the winding is sandwiched between the pedestal and the second bent piece. parts.
[5] The end of the winding is joined in a melted state together with the first bent piece by laser welding, according to any one of [1] to [4], Winding parts.
[6] The winding component according to any one of [1] to [5], wherein the terminal is attached to the winding core.

  As described above, according to the present invention, since the end of the winding is inclined toward the side closer to the first bent piece, the end of the winding is joined integrally with the terminal. It is possible to provide a winding component with improved connection reliability between the terminal and the terminal.

It is a perspective view which shows schematic structure of the coil | winding components which concern on one Embodiment of this invention. It is a perspective view which expands and shows the junction part of the winding coil with which the winding component shown in FIG. 1 is equipped, and an electrode terminal. It is sectional drawing which shows the junction part of the winding coil shown in FIG. 2, and an electrode terminal. It is a perspective view which shows the structure of the electrode terminal shown in FIG. It is sectional drawing which shows the junction part of the winding coil shown as a reference example, and an electrode terminal.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In addition, in the drawings used in the following description, in order to make the features easy to understand, there are cases where the portions that become the features are enlarged for the sake of convenience, and the dimensional ratios of the respective components are not always the same as the actual ones. Make it not exist. In addition, the materials, dimensions, and the like exemplified in the following description are merely examples, and the present invention is not necessarily limited thereto, and can be appropriately modified and implemented without departing from the scope of the invention. .

  As an embodiment of the present invention, for example, a winding component 1 shown in FIG. 1 will be described. FIG. 1 is a perspective view showing a schematic configuration of the winding component 1. In the drawings shown below, an XYZ orthogonal coordinate system is set, the X-axis direction is the length direction of the winding component 1, the Y-axis direction is the width direction of the winding component 1, and the Z-axis direction is the winding component 1. It shall show as a thickness direction, respectively.

  As shown in FIG. 1, the winding component 1 of the present embodiment includes a winding core (winding core) 2, a winding coil (winding) 3 wound around the winding core 2, and a winding coil 3. The plurality of (four in this embodiment) electrode terminals (terminals) 4 to which the end portions 3a are electrically connected are schematically provided.

  The winding core 2 is made of a soft magnetic material such as ferrite. The core 2 is protruded toward both sides in the thickness direction (Z-axis direction) from both ends of the core portion 2a extending in the axial direction (X-axis direction) and the length direction (X-axis direction) of the core portion 2a. A pair of flange portions 2b and a pair (four in total) of boss portions 2c projecting from both ends in the width direction (Y-axis direction) of each flange portion 2b toward both sides in the width direction (Y-axis direction) is doing.

  In the present embodiment, the core portion 2a, the flange portion 2b, and the boss portion 2c are each formed in a substantially rectangular prism shape, but are not necessarily limited to such a shape, and each shape is appropriately changed. Can be added. For example, the core portion 2a can be formed into a substantially cylindrical shape, and the flange portion 2b and the boss portion 2c can be integrated into a substantially cylindrical shape having a larger diameter than the core portion 2a.

  The winding coil 3 is configured by, for example, winding a pair (two) of copper wires around the core portion 2 a of the core core 2. In FIG. 1, only one end of one copper wire is illustrated as the winding coil 3, but each copper wire extends from one end in the length direction (X-axis direction) of the core portion 2 a. It is drawn in the state wound to the end side.

  The plurality of electrode terminals 4 are made of a conductive metal such as phosphor bronze or copper, and are attached to the boss portions 2 c of the core core 2. The electrode terminal 4 has a flat plate shape that is bent along the shape of the boss 2c so as to surround the periphery of the boss 2c over three surfaces, and is fitted to the boss 2c.

  The electrode terminal 4 is electrically connected to the end 3 a of the winding coil 3 by being integrally joined to the end 3 a of the winding coil 3. That is, both end portions of each copper wire constituting the winding coil 3 are integrally joined to the electrode terminals 4 at the drawn positions as end portions 3 a of the winding coil 3.

  Here, the joint portion between the winding coil 3 and the electrode terminal 4 will be described with reference to FIGS. 2 is an enlarged perspective view showing a joint portion between the winding coil 3 and the electrode terminal 4 shown in FIG. FIG. 3 is a cross-sectional view showing a joint portion between the winding coil 3 and the electrode terminal 4 shown in FIG. FIG. 4 is a perspective view showing a configuration of the electrode terminal 4 shown in FIG. FIG. 5 is a cross-sectional view showing a joint portion between the winding coil 3 and the electrode terminal 4 shown as a reference example.

  As shown in FIGS. 2, 3, and 4, the electrode terminal 4 includes a pedestal portion 5 that is in contact with the end portion 3 a of the winding coil 3 and a first bent portion that is bent to face the pedestal portion 5. It has a piece 6 and a second bent piece 7, and an inclined part 8 for inclining the end 3 a of the winding coil 3 abutted against the pedestal part 5 toward the side approaching the first bent piece 6. is doing.

  The pedestal portion 5 is configured by one surface of the electrode terminal 4 bent along the shape of the boss portion 2c described above. The pedestal portion 5 forms a flat surface facing one surface of the boss portion 2c.

  The first bent piece 6 is provided so as to extend from the end portion on the side facing the flange portion 2 b of the pedestal portion 5. The first bent piece 6 before joining is in a state of being bent at a substantially right angle with respect to the pedestal portion 5 so as to face one surface of the flange portion 2b.

  Moreover, the 1st bending piece 6 is formed so that the part (henceforth a welding part) 6b facing the base part 5 may become larger than the part (henceforth bending part) 6a to be bent. ing.

  The second bent piece 7 is located closer to the base end side of the end portion 3 a of the winding coil 3 than the first bent piece 6 and from the end portion on the side facing the flange portion 2 b of the pedestal portion 5. It is extended. The second bent piece 7 before joining is in a state of being bent at a substantially right angle with respect to the pedestal portion 5 so as to face one surface of the flange portion 2b.

  Moreover, the 2nd bending piece 7 is formed so that it may become smaller than the 1st bending piece 6 (welding part 6b) as a crimping part.

  The inclined portion 8 is constituted by a groove portion 9 formed in the pedestal portion 5. The groove portion 9 intersects with the bending direction of the first bent piece 6 and the second bent piece 7 from the end portion of the pedestal portion 5 on the side where the winding coil 3 is located (substantially orthogonal in this embodiment). ).

  Moreover, the groove part 9 has a pair of inclined surfaces 9a inclined in opposite directions and is formed in a substantially V-shaped cross section. Further, the groove portion 9 has a shape in which the depth gradually decreases toward the distal end side of the end portion 3a of the winding coil 3 disposed between the pair of inclined surfaces 9a. In addition, about the depth of the groove part 9, it is preferable to set it as about 0.5 to 1 time with respect to the diameter of the winding coil 3, for example in the deepest position.

  Accordingly, the inclined portion 8 can be inclined toward the side approaching the first bent piece 6 by linearly extending the end portion 3a of the winding coil 3 disposed along the groove portion 9. it can. Further, the end portion 3 a of the winding coil 3 is disposed inside the groove portion 9, thereby preventing the positional deviation in the width direction (Y-axis direction) with respect to the base portion 5.

  Moreover, it is preferable that the terminal part of the groove part 9 is located in the 2nd bending piece 7 side rather than the part facing the 1st bending piece 6. FIG. Accordingly, the end portion 3a of the winding coil 3 disposed inside the groove portion 9 is sandwiched between the second bent pieces 7, while the flat surface of the pedestal portion 5 and the welded portion 6b (first bent piece 6). ) Between the ends 3a of the winding coil 3.

  In the winding component 1 of the present embodiment having the above-described configuration, the end 3a of the winding coil 3 and the electrode terminal 4 are integrally joined by laser welding. Specifically, first, the end portion 3a of the winding coil 3 is arranged along the groove portion 9 (inclined portion 8), and the end portion 3a of the winding coil 3 in contact with the pedestal portion 5 is first folded. The state is inclined toward the side approaching the curved piece 6.

  Next, from this state, by bending the second bent piece 7 in a direction approaching the pedestal 5, the end 3 a of the winding coil 3 is moved between the pedestal 5 and the second bent piece 7. It is assumed that it is sandwiched between them (crimped state). As a result, the end 3 a of the winding coil 3 is positioned and fixed (temporarily fixed) with respect to the pedestal 5.

  Next, from this state, by bending the first bent piece 6 in a direction approaching the pedestal 5, the end 3 a of the winding coil 3 is connected to the pedestal 5 and the welded portion 6 b (first bent It is assumed that it is sandwiched between the pieces 6). At this time, since the end 3a of the winding coil 3 is inclined toward the side approaching the weld 6b, the end 3a is in contact with the weld 6b without creating a gap with the weld 6b. can do.

  Next, from this state, the end 3a of the winding coil 3 is joined together with the welded portion 6b (first bent piece 6) by laser welding. Thereby, the edge part 3a of the winding coil 3 and the electrode terminal 4 can be joined integrally.

  In the winding component 1 of the present embodiment, a groove portion 9 (inclined portion 8) is provided to incline the end portion 3a of the winding coil 3 described above toward the side closer to the welded portion 6b (first bent piece 6). Thus, it is possible to reliably join these by laser welding without generating a gap between the end 3a of the winding coil 3 and the weld 6b.

  On the other hand, when such a groove 9 (inclined part 8) is not provided in the base part 5, as shown in FIG. 5, there is a gap S between the end 3a of the winding coil 3 and the welded part 6b. May occur. In this case, at the time of laser welding, the heat transmitted from the welded part 6b to the end part 3a of the winding coil 3 becomes insufficient, which may cause poor welding.

  As described above, in the winding component 1 of the present embodiment, the connection reliability between the end 3a of the winding coil 3 and the electrode terminal 4 can be improved. In addition, the yield of the winding component 1 can be improved.

In addition, this invention is not necessarily limited to the thing of the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, although the V-shaped groove portion 9 described above is illustrated for the inclined portion 8, the shape of the groove portion 9 is not limited to such a shape, and can be appropriately changed, for example, a U-shape. It is. Further, the groove 9 is not limited to a shape whose depth changes continuously, but may be a shape whose depth changes stepwise.

  Further, the inclined portion 8 is not necessarily limited to the configuration in which the groove portion 9 described above is provided, and the end portion 3a of the winding coil 3 in contact with the pedestal portion 5 is welded to the welded portion 6b (first portion). What is necessary is just to incline to the side approaching the bending piece 6). For example, a configuration in which a stepped portion or the like is provided instead of the above-described groove portion 9 may be employed. On the other hand, the groove 9 described above can be easily and inexpensively formed with respect to the pedestal 5.

  Further, the winding component to which the present invention is applied is not necessarily limited to the one having the form of the winding component 1 described above, and the winding core, the winding wound around the winding core, and the winding The present invention can be widely applied to a winding component including a terminal to which an end of the coil is electrically connected.

  DESCRIPTION OF SYMBOLS 1 ... Winding component 2 ... Winding core (winding core) 3 ... Winding coil (winding) 4 ... Electrode terminal (terminal) 5 ... Base part 6 ... 1st bending piece 7 ... 2nd bending piece 8 ... Inclined part 9 ... Groove part 9a ... Inclined surface

Claims (6)

Winding core,
A winding wound around the winding core;
A terminal to which an end of the winding is electrically connected;
The terminal includes a pedestal portion with which an end portion of the winding is in contact, a first bent piece that is bent to face the pedestal portion, and an end portion of the winding that is in contact with the pedestal portion. And an inclined portion that inclines toward the side closer to the first bent piece,
An end portion of the winding is disposed along the inclined portion and is integrally joined to the terminal in a state of being sandwiched between the pedestal portion and the first bent piece. Winding parts.   The winding component according to claim 1, wherein the inclined portion is configured by a groove portion formed in the pedestal portion.   The groove portion has a pair of inclined surfaces inclined in opposite directions to each other, and the depth gradually decreases toward the distal end side of the end portion of the winding disposed between the pair of inclined surfaces. The winding component according to claim 2, wherein the winding component has a shape as follows. The terminal has a second bent piece that is positioned closer to the base end side of the end of the winding than the first bent piece and is bent to face the pedestal portion,
The end part of the said coil | winding is pinched | interposed between the said base part and the said 2nd bending piece, The winding components as described in any one of Claims 1-3 characterized by the above-mentioned.   The end part of the said coil | winding is joined in the state fuse | melted with the said 1st bending piece by laser welding, The winding components as described in any one of Claims 1-4 characterized by the above-mentioned.   The said terminal is attached to the said core, The winding components as described in any one of Claims 1-5 characterized by the above-mentioned.

Images