JP3336346B2 - Chip inductance element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small chip inductance element which can be mounted on a substrate surface, and more particularly to a simple and inexpensive chip inductance element.

[0002]

2. Description of the Related Art Various small chip inductance elements used in electronic equipment have been proposed in the past. For example, the chip inductance element described in Japanese Utility Model Publication No. 7-23929 is configured as shown in FIG.

In FIG. 6, a core 1 has two flanges 2 each having an end surface and a peripheral surface and one coil winding portion 3 formed concentrically and integrally. An arc-shaped concave portion 5 is formed on each side of the end face of one flange 2 via a relatively wide partition 4 formed on the diameter. Plane corners 6 are formed at four corners defined by the recess 5 and the partition 4, and the partition 4 and the corner 6 are located on the same plane. Further, a blocking wall 7 is provided on a side surface of the partition portion 4 adjacent to the concave portion 5, and the surfaces of the concave portion 5 and the corner portion 6 excluding the partition portion 4 are covered with a continuous electrode layer 8.

In the chip inductance element configured as described above, the terminal portions 9 at both ends of the coil wound around the coil winding portion 3 are connected to the electrodes on the surfaces of the concave portions 5 on both sides partitioned by the partition portions 4. Connected to layer 8. Therefore, when the chip inductance element is mounted on the surface of the substrate, a gap is formed between the substrate surface and the end surface of the flange portion 2, and plays a role of escaping the molten solder. Further, the terminal portions 9 of the pair of coils are isolated by the blocking wall 7, so that the outflow of the molten solder is prevented, and the short circuit of the terminal portions 9 can be prevented.

[0005]

However, in the conventional chip inductance element configured as described above, the partition 4 and the recess 5 having a complicated shape must be formed on the end face of the one flange 2 of the core 1. And the electrode layer 8
In this case, there is a problem that the cost is increased because of the necessity of coating.

The present invention has been made in view of such circumstances, and has as its object to provide an inexpensive chip inductance element with a simple structure.

[0007]

Means for Solving the Problems A chip-in according to the present invention
The ductance element includes a core wound with a coil and having flanges at both ends, a plate-shaped base on which the core is mounted, and the base
At the bottom surface of the substrate, facing the first side of the base.
A groove formed toward the second side portion, and a side of the base.
So that it is in close contact with the
A pair of pinches positioned at both ends of the side portion
Part and the pair of holding parts, and
And a connecting portion having a protruding portion fitted into the groove portion of the base.
Having a pair of metal plate terminals having
Each terminal is provided on a first side and a second side of the base.
Each end of the coil pulled out from the coil
It is characterized by being electrically connected to the protruding portion of another metal plate terminal .

[0008]

In the chip inductance element according to the present invention , since the metal plate terminal is fitted to the base, it is not necessary to form an electrode on the core or perform complicated processing, and the cost can be reduced.

In the chip inductance element of the present invention , the metal plate terminal can be held on the base via the holding portions formed at both ends of the metal plate terminal, and the protrusion formed at the center is formed on the base. By fitting the metal plate terminal into the base, the positioning at the time of mounting the metal plate terminal on the base body is ensured, and the metal plate terminal can be firmly mounted. In addition, the terminal portions at both ends of the coil can be guided to the metal plate terminals through the groove portions, thereby facilitating connection .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A configuration example of a preferred embodiment of a chip inductance element according to the present invention will be described below with reference to the drawings. FIG. 1 is an assembly front view showing a configuration example of a chip inductance element of the present invention, FIG. 2 is a top view of FIG. 1, and FIG. 3 is a bottom view of FIG. 4 is a top view of the base 11 of FIG. 1, and FIG. 5 is a perspective view showing the shape of the metal plate terminal 14 of FIG.
In these figures, portions corresponding to those of the conventional example shown in FIG. 6 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

1 to 3, the core 1 has a pair of upper and lower flange portions 2 and a coil winding portion 3 formed concentrically and integrally as in the conventional example. However, the end face of the flange 2 is not formed with the partition 4, the recess 5, the corner 6, the blocking wall 7, and the electrode layer 8 as shown in FIG. The core 1 is mounted on a square plate-shaped base 11 having an insulating property.

As shown in FIG. 4, the base 11
At the center of the side, a groove 12 having a rectangular cross section is cut and formed. A circular concave portion 13 is formed at the center of the upper surface of the base 11 so that a circular convex portion (not shown) formed at the center of the end surface of the lower flange portion 2 of the core 1 is fitted and positioned. Further, metal plate terminals 1 are provided on two opposite sides of the base 11, respectively.
4 is fitted and mounted. The position of the metal plate terminal 14 in the longitudinal direction is determined by a protrusion 12 a formed to protrude outside the inner periphery of the groove 12.

As shown in FIG. 5, the metal plate terminal 14 has a protruding portion 14b which protrudes inward at the center in the longitudinal direction, and has a U-shaped cross section on both sides. A holding portion 14a is provided. When the metal plate terminal 14 is fitted and mounted on two opposing sides of the base 11, the protruding portion 14b is fitted and positioned in the groove 12 of the base 11, and the holding portion 14a is formed at a corner of the groove 12. A convex portion 12a and a ridge portion 1 formed on both sides of the base 11
2b between the base 11 and the base 11 so as to sandwich both sides of the base 11.

According to the chip inductance element shown in the present embodiment, the metal plate terminal 14 to which the coil end portion 9 is connected is fitted to two opposing sides of the base 11 on which the core 1 is mounted. Therefore, there is no need to perform complicated processing on the end face of the flange portion of the core 1, and it is not necessary to form an expensive electrode layer, so that the structure can be simplified and the cost can be reduced. Further, since the metal plate terminals 14 are separately mounted on two opposing sides of the base 11, the metal plate terminals 14 are not entangled at the time of soldering.

[0016]

As described above, according to the chip inductance element of the present invention, the opposing first side portion of the base is provided.
Since the metal plate terminals to which both ends of the coil are connected are fitted to the second side and the second side , the structure can be simplified and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an assembly front view showing a configuration example of an embodiment of a chip inductance element of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a top view showing the configuration of the base body of FIG.

FIG. 5 is a perspective view showing a shape of the metal plate terminal of FIG. 1;

FIG. 6 is a perspective view showing a configuration of an example of a conventional chip inductance element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core 2 Flange part 3 Coil winding part (coil) 9 Coil terminal part 11 Base 12 Groove part 14 Metal plate terminal 14a Clamping part 14b Projection

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01F 27/29

Claims (1)

(57) [Claims] 1. A core on which a coil is wound and having flanges at both ends, a plate-shaped base on which the core is mounted, and a first side of the base on a bottom surface of the base.
A groove portion formed toward the second side of Luo opposing said substrate in the thickness direction as well as in close contact with the side of the base body
Positioned at both ends of the side so as to pinch
And a pair of holding portions and the pair of holding portions
A projection is provided at a central portion to fit into the groove of the base.
And a pair of metal plate terminals each having a connecting portion, wherein each of the pair of metal plate terminals is a first side portion of the base.
And both ends provided on the second side and drawn out of the coil
Terminals of each metal plate terminal
A chip inductance element characterized by being electrically connected .