JPS60224203A - Inductor - Google Patents

Abstract

PURPOSE:To prevent the coil from disconnecting at the vicinities of the wiring position due to stress applied to the wiring position when bending the lead terminal, and to make it possible to produce in miniature, by bending at a right angle the portion of the lead terminal joining with the drum core and by separating the drawing out position of the lead terminal with the wiring position of the coil. CONSTITUTION:The lead terminal 2 bended at a right angle at the tip is bonded with adhesive 4 to an end face of drum core 1 around which a coil 5 is wound. After the coil 5 is soldered to the lead terminal at the position 6, the whole is covered with insulating material 7. In this way, an inductor can be provided, in which stress is not applied to the soldering position 6 of the lead terminal 2 and the coil 5 when the lead terminal 2 is bended, and in which a joining hole in which the lead terminal 2 is bonded to the drum core 1 can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fixed inductor element used in various electronic devices.

Conventional structure and its problems A conventional inductor element of this type was constructed as shown in FIG. That is, the lead terminal 2 is inserted into the lead terminal joining hole 3 of the drum-shaped core 1 and fixed with adhesive 4, and the coil 5 wound around the drum-shaped core 1 is wired and soldered at the lead terminals 2 and 6. attached, and the whole is covered with insulating material 7
It was designed to be covered with

In this case, when the lead terminal 2 is bent, the stress is applied to the wiring portion of the coil 5 at the base of the lead terminal 2, and the coil 5 may break near the wiring portion.

Furthermore, if the dimensions of the drum-shaped core 1 are reduced in order to achieve downsizing, the lead terminal joining holes 3 must be made shallower, which reduces the joining strength of the lead terminals 2, making downsizing difficult. Ta.

OBJECTS OF THE INVENTION The present invention eliminates such conventional drawbacks, and prevents the coil from breaking near the wiring location due to stress applied to the wiring location when bending the lead terminal.
Moreover, the purpose is to realize miniaturization.

Structure of the Invention In order to achieve this object, the present invention bends the lead terminal by bending the joint part of the lead terminal with the drum-shaped core at right angles and separating the buried terminal drawing direction and the coil wiring location. The structure is such that the stress generated when

First, the present invention has a configuration in which radial grooves are provided on the joint surface of the lead terminal of the drum-shaped core to facilitate positioning of the lead terminal during jointing.

Furthermore, in the inductor element having the above configuration, the center line of the lead terminal and the center line of the drum-shaped core are made different, thereby making it possible to change the thickness of the insulating material on the surface of the wiring part of the lead terminal and the direction opposite to this. The thickness of the insulating material on the outer peripheral surface of the drum-shaped core is the same, and the lead terminal is located in the center of the inductor element, making it possible to further reduce the size.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 to 5. In addition, in FIGS. 2 to 5, the same parts as in FIG. 1 are given the same numbers.

FIG. 2 is a sectional view showing an embodiment of the present invention, in which a lead terminal 2 whose tip is bent at right angles is bonded to the end face of a drum-shaped core 1 with an adhesive 4, and a coil is attached to the drum-shaped core 1. 6 is wound, wiring and soldering are performed at the locations 6, and then the whole is covered with an insulating material 7.

FIG. 3 is a perspective view showing another embodiment of the present invention, in which grooves 8 for connecting lead terminals are provided in the radial direction on the end face of the drum-shaped core 1, and lead terminals 2 are adhesively bonded to the grooves 8. ing. FIG. 4 is a perspective view showing still another embodiment of the present invention, in which grooves 8 for connecting lead terminals are provided in the diametrical direction on the end surface of the drum-shaped core 1, and lead terminals 2 are adhesively bonded to the grooves 8. The structure is as follows.

FIG. 6 is a sectional view showing another embodiment of the present invention, in which the center line 9 of the lead terminal 2 and the center line 10 of the drum-shaped core 1 are different, but the center line of the inductor element is constructed such that it coincides with the center line of the lead terminal 2.

Effects of the Invention As described above, the inductor element of the present invention has a structure in which the stress that occurs when the lead terminals are bent is not applied to the soldered area between the lead terminals and the coil, so that the stress that occurs when the lead terminals are bent is reduced. Breakage defects can be eliminated.

Further, when joining the lead terminal to the drum-shaped core, the joining holes provided in conventional products are not required, so miniaturization can be easily achieved.

Furthermore, since the end face of the drum-shaped core is provided with a groove for joining the lead terminals, positioning when adhesively joining the lead terminals is facilitated, and productivity and production yield can be improved.

Further, by making the center line of the lead terminal different from the center line of the drum-shaped core, further miniaturization can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional inductor element, FIG. 2 is a sectional view showing an embodiment of the inductor element of the present invention,
3 and 4 are perspective views of essential parts of another embodiment of the inductor element of the present invention, and FIG. 6 is a sectional view of still another embodiment of the inductor element of the present invention. 1...Drum-shaped core, 2...Lead terminal, 4...Adhesive, 6...Coil, 6
...Wiring/soldering locations, 7...Insulating material, 8...Groove for joining, 9...Center line of lead terminal, 10...・・・・・・Center line of drum-shaped core.

Claims (1)

[Claims] (1) A shell consisting of a drum-shaped core, a coil wound around the drum-shaped core, and a lead terminal for electrically connecting the coil to wiring and a printed circuit board; An inductor element characterized by bending the connection part to the drum-shaped core at right angles, and separating the lead terminal direction and the coil wiring location. ? ) The inductor element according to claim 1, wherein a radial groove is provided on the coupling surface of the lead terminal of the drum-shaped core. (3) The inductor element according to claim 1, wherein the center line of the lead terminal and the center line of the drum-shaped core are different from each other.