JPH056814U - Thin inductor - Google Patents

Abstract

(57) [Summary] [Purpose] Without increasing the height and mounting area,
To provide a thin inductor having a terminal structure configured to be automatically mounted on a substrate. A thin inductor comprising a pair of split-type closed magnetic circuit cores 1 and 2 combined to accommodate an air-core coil 3 made of a conductive material having a lead-out portion 3a, wherein the split-type closed magnetic circuit core 1 has one end The portion has a convex portion 7b for winding the lead-out portion 3a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thin inductor terminal structure composed of a split type closed magnetic circuit core and a conductive material.

[0002]

[Prior Art]

 Conventionally, to mount a thin inductor, which consists of an EE-type core or an EI-type split-type closed magnetic circuit core and its center leg with windings and an air-core coil made of conductive material, to the base plate. , The end of the conductive material of the air-core coil is directly connected. FIG. 4 is a perspective view showing a configuration example of a conventional inductor. In FIG. 4, the inductor has a pair of magnetic cores 51 and 52 in which lead terminals are projected outward to accommodate an air-core coil, and leads 53a are directly drawn out and mounted on a substrate. On the other hand, a terminal block having terminals for board mounting should be bonded to the end of the inductor with such a structure by gluing, and the end of the conductive material should be wound around that end to be mounted on the board. There is an inductor assembled by the above. In this type of inductor, the lead-out end of the lead terminal is connected to the terminal block with the terminal for mounting on the board by gluing, etc., and the end of the conductive material is wound around the end, and the inductor is mounted on the board. It is a thing.

[0003]

[Problems to be solved by the device]

 However, most of the manual work was required to mount the inductor with such a configuration on the board. Further, since it is difficult to hold the substrate and the inductor with only the lead end portion 53a, bonding or the like is required. Therefore, it was difficult to automate the connection of the end of the conductive material directly to the board. On the other hand, the latter inductor with a mounting terminal has a problem that the height or the mounting area becomes large, and the restrictions of the height and the mounting area, which are indispensable for a thin inductor, cannot be cleared and the number of components increases. . Therefore, the technical problem of the present invention is to provide a thin inductor having a terminal structure that can be automatically mounted on a substrate without increasing the height and the mounting area.

[0004]

[Means for Solving the Problems]

 According to the present invention, in a thin inductor in which an air-core coil made of a conductive material having a lead portion is housed in combination with split type closed magnetic circuit cores, one of the pair of split type closed magnetic circuit cores has one end A thin inductor having a convex portion for winding the lead-out portion is obtained.

[0005]

[Action]

 In the thin inductor of the present invention, a protrusion is formed on one end of one of the split type closed magnetic circuit cores, and the lead-out part of the air-core coil made of a conductive material is wound around the protrusion of the split type closed magnetic circuit core. In addition, it is formed by accommodating an air-core coil in combination with the other split type closed magnetic circuit core. Therefore, it is possible to easily mount on the board by this convex portion.

[0006]

【Example】

 1 is a perspective view showing an overall view of a thin inductor according to an embodiment of the present invention, FIG. 2 is a perspective view showing an exploded assembly of the inductor of FIG. 1, and FIG. 3 is an assembly of the inductor of FIG. 1 from the parts shown in FIG. It is a figure for explaining. Referring to FIG. 1, a thin inductor according to an embodiment of the present invention has a pair of magnetic cores 1 and 2, which are split type closed magnetic circuit cores, with entangled portions 8 formed at one end thereof. In FIG. 2, the magnetic core 1 is made of a ferrite sintered plate, and is equivalent to the accommodating hole 5 recessed from the peripheral part 4 in the central part and the peripheral part 4 protruding from the bottom part in the accommodating hole 5. And a core portion 6 having a height plane 6a. The accommodation hole 5 has a ring-shaped groove 5a, extensions 5b and 5c that are narrower than the ring diameter from the groove 5a and extend outward in mutually opposite directions, and the periphery 4 from the extension 5c. It has a stepped base 7a and a pair of protrusions 7b extending in parallel from the base 7a to the side surface. The magnetic core 2 has the same configuration as the magnetic core 1 except that the magnetic core 2 does not have the base portion 7a and the convex portion 7b. The air-core coil 3 is formed by winding a conducting wire 3b made of a conductive material in a substantially concentric shape, and extending the lead-out portions 3a from both ends of the conducting wire 3b in parallel to one side. In FIG. 3, the air-core coil 3 is incorporated into the magnetic core 1, and the projecting portions 7b and 7b are entwined with the lead-out portions 3a and 3a of the air-core coil 3 to form the entanglement portions 8 and 8. Then, the peripheral portion 4 and the core portion 6 are joined to each other, and the lead entanglement portion 8 is soldered to form a board mounting terminal, as shown in FIG. A thin inductor is formed. In this way, the position of the terminal is determined, and by plating the terminal, automatic mounting is possible, and bonding to the board is possible without the need for bonding. If the corners of the protrusions 7b of the magnetic core 1 are chamfered, it becomes easier to bind the lead-out portions 3a to the protrusions 7b. Further, the protruding portions 7b, 7b may be formed by preliminarily solder-plating the lead-out portions 3a, 3a.

[0007]

[Effect of the device]

 As described above, according to the present invention, it is possible to provide a thin inductor that has a small number of components and a small mounting area and can be automatically mounted.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall image of a thin inductor according to an embodiment of the present invention.

2 is an exploded perspective view of the inductor of FIG. 1. FIG.

FIG. 3 is a view for explaining the assembly of the inductor shown in FIG. 1 from the respective parts shown in FIG.

FIG. 4 is a perspective view showing a configuration of a conventional mounted inductor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 magnetic core 2 magnetic core 3 air-core coil 3a lead-out part 3b conducting wire 4 peripheral part 5 accommodation hole 5a groove 5b extension part 5c extension part 6 core part 6a plane 7a base part 7b convex part 8 entanglement part 51 magnetic core 52 magnetic core 53a lead

Continuation of the front page (72) Inventor Kunihito Endo Nihonhon Telegraph and Telephone Co., Ltd. 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo

Claims (1)

Claims for utility model registration: 1. A thin inductor comprising an air-core coil made of a conductive material having a lead portion in combination with a split type closed magnetic circuit core. A thin inductor, wherein one of the cores has a protrusion at one end for winding the lead-out portion.