JP2826932B2 - Chip electronic components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductor-like electronic component mounted on a circuit board, and more particularly, to a junction of a chip-like electronic component in which a plate-like electrode lead is joined to a lead wire of an axial lead-type electronic component. The structure of the plate-like electrode lead.

[0002]

2. Description of the Related Art As shown in FIG.
Using a plate-shaped electrode lead d provided with a cut c at the bottom of the cut-out recess b formed at the edge a, the lead wire f of the axial lead type electronic component e is connected to the cut-out recess b of the plate-like electrode lead d.
And a chip-shaped electronic component in which a lead wire f and a plate-shaped electrode lead d are joined by solder (not shown).

According to this chip-shaped electronic component, the plate-shaped electrode lead d has a greater degree of freedom in opening and closing the notch recess b due to the spring elastic force of the notch c. It has the feature of stably supporting the embedded lead wire f.

[0004]

However, in the above-mentioned chip-shaped electronic component, the contact area between the lead wire f and the plate-shaped electrode lead d is small because the plate-shaped electrode lead d is thin, so that the lead wire The bonding strength between f and the plate electrode lead d is weak. The present invention relates to an improvement of the previously proposed one,
It is an object of the present invention to provide a highly reliable chip-shaped electronic component having a high bonding strength between a lead wire and a plate-shaped electrode lead.

[0005]

According to a first aspect of the present invention, there is provided a chip-type electronic component comprising a plate-like electrode lead provided with a notch at a bottom of a notch recess formed at an edge. The chip-shaped electronic component, wherein a lead wire of the axial lead type electronic component is fitted into a cutout recess of the plate-shaped electrode lead, and the lead wire and the plate-shaped electrode lead are joined by a conductive bonding agent, Notch cut at the bottom of the notch
Width of the end portion of the missing concave side is narrower than the width of the other portions of the cut, the periphery of the cut recess, in that a said protruding portion that protrudes in the extending direction of the lead wire fitting The chip-shaped electronic component according to claim 2, wherein a plate-shaped electrode lead provided with a notch at the bottom of a cutout recess formed at an edge portion is used, and a lead wire of an axial lead-type electronic component is connected to the plate-shaped electrode. In a chip-shaped electronic component which is fitted into a cutout recess of a lead and the lead wire and a plate-shaped electrode lead are joined by a conductive bonding agent , the cutout is sandwiched by a separation strip at the bottom of the cutout recess.
And a width narrower than the width of the slit
Through the notch recess and the slit formed in the separation strip
That is composed of a cut, the periphery of the cut recess, characterized in that a protruding portion that protrudes in the extending direction of the lead wire fitting.

[0006]

SUMMARY OF] According to the present invention described in claims 1 and 2, the peripheral edge of the cutout recess of the plate-like electrode lead, the projecting portion
Since protruding extension direction of the lead wire to be fitted by forming, it increases the contact area between the lead in cutout recess of the plate-like electrode lead, to improve the bonding strength by soldering.

When press-forming a plate-like electrode lead,
It is difficult to punch into a narrow and narrow shape in the hand direction due to the design of the mold . According to the present invention, the cut is formed by cutting the cut.
The width of the end on the side of the recess is narrower than the width of the other part of the cut
Or place the separating strip at the bottom of the notch
And a width smaller than the width of the slit and
A cut formed in the strip to communicate the notch recess with the slit
With the configuration with the eyes, the circumference of the bonding agent between the notch recess and the lead wire is improved, and the bonding strength is further improved even if the amount of the bonding agent is small. In addition , the contact area between the lead wire and the notch recess is further increased, so that the bonding strength is improved.

[0008]

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

FIG. 1 shows a partially cut-away side view of one embodiment of the present invention applied to an inductor.

[0010] In the figure, 1 is a axial lead type b <br/> Ndaku data body, the inductor body 1, a drum-shaped magnetic core 2 wound around 3 are wound, the terminal 4 is a drum-shaped magnetic cores 2 And is soldered to the base end of a lead wire 5 having a circular cross section extending in the axial direction from both end surfaces thereof, and a plate-like electrode lead 7 is joined to the lead wire 5 by soldering. The plate-like electrode lead 7 covered with an insulating sheath 6 formed by molding with an insulating material such as a resin and joined to the lead wire 5 is exposed from the insulating sheath 6 and extends along the lower surface thereof. The electrode 8 is bent to form an electrode 8.

The plate electrode lead 7 is shown in FIG.
As shown in FIGS. 3B and 3C and FIG. 3, a substantially circular cutout recess 10 is provided at the center of the upper edge 9 and a cutout 11 is formed at the bottom thereof. The diameter of the notch 10 is 1 notch
The lead wire 5 is formed to be slightly smaller than the lead wire 5 so as to sandwich the lead wire 5 by the elastic force of the spring 1.
When the lead wire 5 is fitted into the notch recess 10, the diameter of the notch recess 10 is increased so that the lead wire 5 can spread through the elasticity of the notch 11 and pass through the lead wire 5, and the fitted lead wire 5 does not easily come out. It is formed smaller and wider at its outer end so that the lead wire can easily enter.

The notch 11 is a notch recess 10 of the notch 11.
The width of the side end is smaller than the width of the other part of the cut 11
As described above, both corners of the notch recess 10 side end are formed in an arc shape, respectively, and are formed to have a narrow width.
By drawing, protrude extension direction of the lead 5 to be fitted are protrusions 12 formed, thus gap size of the projecting portion 12 by cutting 11甚properly decreased, the notch including a protruding portion 12 The solder (not shown) between the recess 10 and the lead wire 5 spreads almost all around without being interrupted by the gap.

In the above embodiment, a notch 11 is punched out at the bottom of the notch recess 10 so as to be continuous therewith.
After forming the notch concave portion 10 and the slit 11 ′ through the separation strip 13 having a minute width as shown in FIG.
Cut (14) by a method such as pushing a large-diameter member into the notch recess 10 to form a cut narrower than the slit 11 '.
Is formed on the separation strip 13, and the slit 11 ′ and the cut
The notch 11 may be formed by the above.

The present invention can be applied not only to inductors but also to capacitors and other electronic components.

[0015]

According to the present invention, as described above, the bonding strength between the lead wire of the electronic component body and the plate-shaped electrode lead is strong, the reliability as the electronic component is improved, and the conductive bonding is performed. This has the effect that the amount of the agent can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

Figure 2 (A) (B) and (C) is a plan view of the embodiment in more manufacturing processes, a front view and a side view

FIG. 3 is a side view of the plate-shaped electrode lead of the present invention.

FIG. 4 is a side view of another plate electrode lead of the present invention.

FIG. 5 is a perspective view of a main part of a chip-shaped electronic component proposed by the present inventors.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Axial lead type inductor body 5 Lead wire 6 Insulating armor 7 Plate electrode lead 8 Electrode 9 Upper edge 10 Notch recess 11 Notch 12 Projection 13 Separation strip 14 Cutting

Continuation of the front page (56) References JP-A 63-191612 (JP, U) JP-A 58-144809 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01F 27 / 28 H01F 27/29 H01F 27/06 H01F 5/04

Claims (2)

(57) [Claims] 1. A plate-shaped electrode lead having a notch formed at the bottom of a notch recess formed at an end portion, and a lead wire of an axial lead type electronic component is fitted into the notch recess of the plate-shaped electrode lead. In a chip-shaped electronic component in which the lead wire and the plate-shaped electrode lead are bonded by a conductive bonding agent, the notch recess is provided.
The width of the notch provided on the bottom of the notch
Formed narrower than the width of the other parts, on the periphery of the notch recess ,
Electronic chip components, characterized in that a said protruding portion that protrudes in the extending direction of the lead wire fitting. 2. A plate-shaped electrode lead having a notch formed at the bottom of a notch recess formed at an edge portion, and a lead wire of an axial lead type electronic component is fitted into the notch recess of the plate-shaped electrode lead. in the chip-like electronic component formed by joining by the conductive bonding agent and the lead wire and the plate-shaped electrode lead, the notch
To the slit located at the bottom of the notch
And a width smaller than the width of the slit and
Consists of cutout recesses and cuts communicating with slits
And, wherein the notch in the periphery of the concave portion, the chip-like electronic component, characterized in that a protruding portion that protrudes in the extending direction of the lead wire fitting.