JPH02271511A - Manufacture of chip-type inductor - Google Patents

Abstract

PURPOSE:To obtain a productivity suitable for mass production by a method wherein, after a coil has been wound continuously on one core, it is separated into a plurality of inductors. CONSTITUTION:A core 10 which is provided with a plurality of winding grooves 12 and many guards 14 is used; electrodes 20 are formed on circumferential side faces of the guards 14. A wire material 40 is wound continuously on the respective winding grooves 12 in the prescribed number each; the wire material 40 which strides the individual guards 14 is connected to the electrodes 20; after that, the core 10 is cut in parts of the winding grooves 12 at prescribed intervals. Accordingly, the number of mounting operations of the core 10 on a chuck 30 of a winding machine are reduced; the electrodes 20 can be connected simultaneously to the wire material 40 for a plurality of pieces. Thereby, a productivity can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for manufacturing a chip-type inductor in which a wire is wound around a drum-shaped core.

[Conventional technology]

Conventionally, after each core was mounted on a chuck of a winding machine and the wire was wound, the terminal end was connected to an electrode attached to the core using means such as a solder dip.

[Problem to be solved by the invention]

However, since each wire is wound around a small core, handling is troublesome and time-consuming, and complicated soldering equipment is required, resulting in low productivity.

An object of the present invention is to provide a highly productive method for manufacturing a chip-type inductor suitable for mass production.

[Means to solve the problem]

The present invention uses a core having a plurality of winding grooves and a large number of flanges,
After forming electrodes on the circumferential side of the tsuba and connecting the wires that span each tsuba by continuously winding the wire a predetermined number of times in each of the winding grooves, the core is inserted into the winding groove at predetermined intervals. The method for manufacturing a chip-type inductor is characterized by cutting at the portion.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a core 10 used in the manufacturing method according to the present invention. The core 10 includes a plurality of winding grooves 12 and a large number of flanges 14 integrally formed at both ends of the winding grooves 12. Almost the entire circumferential surface of each collar 12 is provided with an electrode 20 made of a conductive film formed by silver printing, metallization, or the like.

A wire 40 made of a conducting wire covered with an insulating film is wound around the core 10 as shown in FIG. 2, for example.

In the figure, 30 is a chuck of a winding machine that rotates while holding one end of the core 10, 32 is a steady rest member that rotatably holds the other end of the core 10, and 50 is a wire rod 40 supplied from a winding frame (not shown). It is a cylindrical nozzle that discharges.

One end of the wire rod 40 is connected and fixed to the electrode 20 of the collar 14 at the left end in the figure by means such as soldering or welding, and the chuck 30 is rotated while sequentially moving the wire rod supply nozzle 50 to the right in the figure. and each winding groove 12 beyond the collar 14.
The wire rod 40 is continuously wound a predetermined number of times. At this time, winding grooves 12 in which the wire 40 is wound only once, or winding grooves 12 in which it is not wound at all, are provided at regular intervals. In this example,
Every other winding groove 12 is provided in which the wire 40 is wound only once. Further, on each collar 14, a wire 40 is connected to the electrode 20 by soldering or the like.

Next, by cutting the core 10 and the wire 40 at the positions indicated by dashed lines, three chip-type inductors 60 as shown in FIG. 3 are obtained.

The inductor 60 may be used by directly soldering the electrode 20 to a conductive pattern on a printed circuit board, but it may also be configured by attaching a new terminal 72 and sealing it in a resin 80 as shown in FIG. . To obtain such a resin-sealed inductor, for example, as shown in FIG. 5, the inductor 60 is attached to a lead frame 70 having a terminal portion 72 and a connecting portion 74, and the electrode 20 is bonded to the terminal portion 72 before being sealed with resin. What is necessary is to seal the terminal portion 72 in the terminal portion 80 and then bend the terminal portion 72 separated from the connecting portion 74.

Note that instead of the core 10 having a round flange 14, a core 10' having a rectangular flange 14' as shown in FIG. 6 may be used.The present invention is not limited to a two-piece tsuba; It can also be applied to the manufacture of inductors having a flange.

〔Effect of the invention〕

Since the manufacturing method of the present invention involves continuously winding a wire around one core and then separating it into multiple inductors, the number of times the core is attached to the chuck of the winding machine is reduced, and the connection between the electrode and the wire is also reduced. Productivity can be significantly improved by allowing simultaneous processing of multiple items.

[Brief explanation of drawings]

The drawings all show embodiments of the present invention; Fig. 1 is a perspective view of the core before winding, Fig. 2 is a front view showing the winding process, Fig. 3 is a front view of the inductor, and Fig. 4 is a perspective view of the core before winding. 5 is a partially cutaway perspective view showing the manufacturing process thereof, and FIG. 6 is a perspective view showing a modified example of the core. 11i 10-... Core 20 ・--- Electrode 12-- Winding groove 40 ・-----
−・Wire rod 14・−・−・・Tsuba Figure 3

Claims (1)

[Claims] An electrode is formed on the circumferential surface of the flange of a core having a plurality of winding grooves and a flange integrally formed at both ends of the winding groove, and a wire is continuously wound a predetermined number of times in each winding groove, After connecting the wire rod passing over each collar to the electrode, the core and wire are cut at predetermined intervals at the winding grooves to obtain a chip-type inductor having a plurality of collars. A method of manufacturing a chip type inductor.