JP2005159006A - Inductor, terminal for inductor, and manufacturing method for inductor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an inductor, a terminal for the inductor, and a manufacturing method of the inductor, in which the handling of a terminal in assembling is simplified with the reduced number of processes, no tension is applied to a lead wire, and an oversize due to excessive winding is prevented. <P>SOLUTION: The inductor comprises a magnetic material core composed of a plate shaped magnetic core 5 and a pot shaped magnetic core 5a, a winding 1, and a terminal 4a for an inductor. The terminal 4a for the inductor is disposed on the plate shaped magnetic core 5. The terminal 4a for the inductor comprises a fixed part 2 and a wire holding part 3 folded substantially at a right angle from the fixed part 2. The wire holding part 3 has an air gap in its surface opposite to the fixed part 2, and further has a circular hollow part at its center communicating with the air gap. The wire end 7a of the wiring 1 is disposed at the circular hollow part and tentatively fixed vertically by the caulking of the wire holding part 3 and processed with solder 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

   The present invention relates to an inductor, an inductor terminal, and an inductor manufacturing method suitable for use mainly in portable terminals, power supply devices, and the like.

  Conventional inductors such as coils and transformers are composed of a magnetic material, a winding, and a coil bobbin.A terminal is disposed on the bobbin, and a lead wire of the winding is wound around the terminal. A configuration in which soldering is performed is common.

  Patent Document 1 describes a method of winding and fixing a winding portion around a terminal mounting portion of a coil bobbin of a coil. Patent Document 2 describes a method of winding and fixing a primary winding and a secondary winding around a terminal mounting portion of a coil bobbin with a transformer.

  FIG. 3 is a perspective view showing a part of another conventional inductor. This conventional inductor is an inductor composed of a magnetic material core, a winding 11 and an inductor terminal 41a, and is configured by combining the components of FIG. 3 with a pot-shaped magnetic core not shown here. Is done. The inductor terminal 41a is disposed on a plate-shaped magnetic core 51 of the magnetic material core, and the inductor terminal 41a is a fixed portion 21 and a wire holding member bent at a substantially right angle from the fixed portion 21. The wire holding portion 31 has a U-shape, and the wire end portions 71 a and 71 b of the winding 11 are wound around the U-shape portion of the wire holding portion 31. As a result, the solder 61 is soldered.

JP 2002-299131 A JP 2002-231538 A

A conventional inductor is wound about two turns around a terminal and soldered. In this case, there are the following problems.
(1) Since the end of the wire is wound around the terminal for about two turns, the manufacturing man-hour is required.
(2) When the wire end is pulled out, tension is applied to the wire, and the tension remains even after soldering.
(3) When the wire end is wound around the terminal, the size of the outer periphery of the inductor exceeds the winding thickness.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an inductor, an inductor terminal, and an inductor manufacturing method in which terminal processing during assembly is simple, man-hours are reduced, no tension is applied to a lead wire, and an excess of dimensions due to winding is prevented Is to provide.

  The inductor of the present invention is an inductor composed of a magnetic material core composed of a plate-shaped magnetic core, a pot-shaped magnetic core, a winding and an inductor terminal, wherein the inductor terminal is the plate The inductor terminal is arranged on a magnetic core or a pot-shaped magnetic core, and the inductor terminal is composed of a fixed portion and a wire holding portion bent at a substantially right angle from the fixed portion, and the wire holding portion is A gap portion on the surface opposite to the fixed portion, a circular hollow portion communicating with the gap portion in the center, and a wire end of the winding is disposed in the circular hollow portion. In the inductor, the wire end portion is temporarily fixed in the vertical direction and soldered so as not to be separated from the gap portion by caulking of the wire holding portion.

  Further, the present invention is an inductor terminal composed of a fixed portion and a wire holding portion that is bent at a substantially right angle from the fixed portion, and the wire holding portion is a surface opposite to the fixed portion. The center is a circular hollow portion communicating with the gap, and the fixed portion is disposed on a plate-like magnetic core or a pot-like magnetic core constituting the inductor, and the wire The shape of the holding part has a gap on the surface opposite to the fixed part, a circular hollow part communicating with the gap at the center, and the wire end of the winding of the inductor is connected to the circle. It is an inductor terminal that can be fixed in a vertical direction so as to be disposed in a hollow portion of the shape and to prevent the wire end portion from being detached from the gap portion by caulking of the wire holding portion.

  According to another aspect of the present invention, there is provided an inductor manufacturing method in which a magnetic material core including a plate-shaped magnetic core, a pot-shaped magnetic core, a winding, and an inductor terminal are assembled. The inductor terminal is disposed on the plate-shaped magnetic core or the pot-shaped magnetic core, and the inductor terminal includes a fixed portion and a wire holding portion bent at a substantially right angle from the fixed portion, and the wire holding portion Has a void portion on the surface opposite to the fixed portion, has a circular hollow portion communicating with the void portion in the center, and passes the wire end of the winding through the void portion, It is placed in the circular hollow part, and then the wire end is temporarily fixed by caulking the wire holding part, soldered, and a pot-like magnetic core or plate-like magnetic core is formed so as to form a magnetic core. Body core An inductor manufacturing method of the.

  According to the present invention, it is possible to provide an inductor, an inductor terminal, and an inductor manufacturing method in which terminal processing during assembly is simple, man-hours are reduced, a lead wire is not tensioned, and an excess of dimensions due to winding thickness is prevented. .

  FIG. 1 is a perspective view showing a part of an inductor according to an embodiment of the present invention. FIG. 4 is an explanatory view of assembly of the inductor of the present invention. The inductor of the present embodiment is an inductor composed of a magnetic material core composed of a plate-shaped magnetic core 5 and a pot-shaped magnetic core 5a, a winding 1, and inductor terminals 4a and 4b. . The inductor terminals 4 a and 4 b are disposed on the plate-like magnetic core 5. The inductor terminal 4a includes a fixed portion 2 and a wire holding portion 3 bent from the fixed portion 2 at a substantially right angle. The wire holding part 3 has a gap on the surface opposite to the fixed part 2, and the center is a circular hollow part communicating with the gap. The wire end portion 7a of the winding 1 is disposed in the circular hollow portion, and the wire end portion 7a is vertically moved in the figure so as not to escape through the gap portion by caulking of the wire holding portion 3. Temporarily fixing and soldering with the solder 6.

  Next, as shown in FIG. 4, the inductor of the present embodiment is obtained by mounting the pot-shaped magnetic core 5a on the plate-shaped magnetic core 5, the winding 1, and the inductor terminal 4a. In the above description, the inductor terminal 4a is attached to the plate-like magnetic core 5. However, after the inductor terminal 4a is attached to the pot-like magnetic core 5a and the winding 1 is attached, the plate-like magnetic core is attached. 5 may be installed.

  FIG. 2 is an explanatory diagram of an inductor terminal according to the embodiment of the present invention. FIG. 2A is an explanatory diagram of a state before caulking, and FIG. 2B is an explanatory diagram of a state after caulking. As shown in FIG. 2A, the wire end portion 7a of the winding 1 is passed through the gap of the wire holding portion 3 and once held in the hollow portion. Next, as shown in FIG. 2B, the upper side of the wire holding portion 3 is caulked in the direction of the arrow in the drawing, and the wire end portion 7a passes through the gap portion again and is temporarily fixed. Next, a surplus portion of the wire end portion 7a protruding outside the wire holding portion 3 is cut, and then soldered.

  The inductor of the present invention has the following improvements compared to the conventional one. Since the end portion of the wire is not wound around the wire holding portion, the number of manufacturing steps is reduced as compared with the prior art. Further, the wire end portion is fixed to the wire holding portion in a state where no tension is applied. Further, since the wire end portion is not wound, there is no problem that the outer dimension of the inductor exceeds the size due to the thickening of the winding as in the conventional case.

The perspective view which shows a part of inductor by embodiment of this invention. Explanatory drawing of the terminal for inductors by embodiment of this invention. FIG. 2A is an explanatory diagram of a state before caulking, and FIG. 2B is an explanatory diagram of a state after caulking. The perspective view which shows a part of conventional inductor. The assembly explanatory drawing of this invention or the conventional inductor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Winding | winding 3,3a Wire holding part 2,2a Fixed part 4,4a, 4b Inductor terminal 5,51 Plate-shaped magnetic body core
5a Pot-shaped magnetic cores 7a, 7b, 71a, 71b Wire ends 6, 61 Solder

Claims (3)

  In an inductor composed of a magnetic material core composed of a plate-shaped magnetic core, a pot-shaped magnetic core, a winding, and an inductor terminal, the inductor terminal is the plate-shaped magnetic core or The inductor terminal is arranged in a pot-shaped magnetic core, and the inductor terminal includes a fixed portion and a wire holding portion bent at a substantially right angle from the fixed portion, and the wire holding portion is opposite to the fixed portion. The side surface has a gap, the center has a circular hollow that communicates with the gap, the wire end of the winding is disposed in the circular hollow, and the wire end The inductor is characterized by being temporarily fixed and soldered so as not to be separated from the gap portion by caulking of the wire holding portion.   An inductor terminal composed of a fixed portion and a wire holding portion bent at a substantially right angle from the fixed portion, wherein the wire holding portion has a gap portion on a surface opposite to the fixed portion. The center is a circular hollow portion communicating with the gap portion, the fixed portion is disposed on a magnetic core constituting the inductor, and the wire holding portion has a gap portion on a surface opposite to the fixed portion. A circular hollow portion that communicates with the gap portion at the center, the wire end portion of the winding of the inductor is disposed in the circular hollow portion, and the wire end portion is connected to the wire holding portion. An inductor terminal characterized by being fixed so as not to be disengaged from the gap by caulking.   In the manufacturing method of an inductor formed by assembling a magnetic material core composed of a plate-shaped magnetic core, a pot-shaped magnetic core, a winding, and an inductor terminal, the inductor terminal includes the plate-shaped magnetic core. The inductor terminal is arranged on a body core or a pot-shaped magnetic core, and the inductor terminal includes a fixed portion and a wire holding portion bent at a substantially right angle from the fixed portion, and the wire holding portion is connected to the fixed portion. There is a gap on the opposite surface, a circular hollow that communicates with the gap in the center, and the wire end of the winding is placed in the circular hollow, and then the wire is held An inductor characterized by temporarily fixing a wire end by caulking, soldering, and mounting a pot-shaped magnetic core or a plate-shaped magnetic core so as to form the magnetic material core Manufacturing method.

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