JPS603556Y2 - inductance element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inductance element, and more particularly to an inductance element having a structure in which a bobbin with a pin in which a coil is wound is provided in a set of pot cores, and the pot cores are tightened and integrated with a metal fitting.

Generally, a bobbin with a pin used for this type of inductance element has a structure in which a piece is formed in the collar of the bobbin, and a pin as a terminal is provided in the piece.

FIGS. 1 and 2 show a typical bobbin with a pin.

In this figure, pieces 3 are formed on both sides of the lower collar 2 of a bobbin with a pin, and each piece 3 has a pin 4 serving as a terminal.
will be provided.

Furthermore, a protrusion 5 is formed on the bottom of the piece 3 to prevent the piece 3 and the mounting board from coming into close contact with each other and protect the exposed portion of the lead wire to the pin 4.

By the way, when an inductance element is constructed by combining the bobbin with pin 1 and the pot core as described above, the metal fitting for tightening and integrating the pot core and the bobbin with pin 1 are not related to each other, so the metal fitting is attached to the pot core. It is necessary to adopt a structure that prevents the inductance element from coming off the substrate and allows easy positioning of the inductance element on the substrate, resulting in a complicated metal fitting structure and high cost.

In addition, when used as a high-voltage transformer, etc. where high voltage is applied, the inner surface of the lower rib 2 of the pin bobbin 1 (the surface on which the winding is wound) is a flat surface, so the lead wire can be drawn out from the winding. Insulation between the pin 4 and the pot core, to which high voltage is applied, becomes a problem.

In view of the above points, the present invention provides an inductance element that allows easy positioning of the bobbin with pin, pot core, and metal fittings, improves assembly workability, and improves insulation performance. This is what I am trying to do.

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

In FIGS. 3 to 5, an engaging portion 12 is formed on the upper collar 11 of the pin bobbin 10 in a vertical and outward direction.

Moreover, the collar 11 extends to the inside of the engaging part 12,
A narrow sector-shaped notch A is formed symmetrically.

Further, a step 14 is formed on the lower flange 13 of the pin bobbin 10, so that a part of the inner surface of the lower flange 13 becomes a step surface 15 that is one step lower.

A piece 16 is formed on the stepped surface 15, and a pin 17 serving as a terminal is provided on the piece 16.

Furthermore, a spacer 18 is formed on the bottom surface of the piece 16 and projects along the pot core 20B.

Furthermore, a notch display 19 is formed at one corner of the piece 16 to display the No. 1 terminal.

The pot cores 2OA and 20B include a disk portion 21, an outer shell portion 22 integrally formed on the periphery of the disk portion 21, and a disk portion 21.
The engaging portion 12 and piece 16 of the bobbin with pin 10 are formed so as to be able to engage with the disc portion 21.

Pot core 20A. A metal fitting 30 for tightening and integrating 20B has a U-shape with an upper surface 31 and an inner surface 32 having an elastic curved surface, and mounting legs 33 are integrally formed at the lower ends of both sides 32, and the mounting legs 33 are integrally formed at the lower ends of both sides 32. A locking portion 34 is formed at the base of 33 and is bent inward.

To assemble each member, use a bobbin 10 with a pin provided with a coil 40.
Then, the pot cores 2GA and 20B are fitted from above and below, respectively, so that the disk portions 21 of the pot cores 20A and 20B engage with the engagement portion 12 and the piece 16 of the pot bin 10, and furthermore, the upper surface 31 of the metal fitting 30 engages with the engagement portion 12 and the piece 16 of the pot core 10. This is done by fitting the metal fittings 30 around the pot cores 20A, 20B so as to engage with the pot cores 12, and tightening the pot cores 20A, 20B to integrate them.

According to the above embodiment, the following effects can be achieved.

(1) Attach the engaging portion 12 to the bobbin 10 with the pin to the pot core 20
Since the pot cores 20A, 20B and the metal fitting 30 are formed so as to be able to engage with each other, the pot cores 20A, 20B and the metal fitting 30 can be easily positioned, and the assembly work efficiency can be improved.

(2) Since the step surface 15 is formed on the lower brim 13, the coil 4
It is possible to easily draw out and insulate the zero lead wire.

As a result, when used in a high-voltage transformer or the like to which high voltage is applied, it is possible to prevent short-circuit accidents in the lead wire portion.

(3) Attach the spacer 18 to the bottom of the piece 16 of the lower brim 13.
Since it is formed so as to be in contact with the pot core 20B, it is possible to improve the withstand voltage by improving the insulation between the pin 17 and the pot core 20B.

Further, it is possible to eliminate the inconvenience of the exposed portion of the pin 17 directly touching the mounting board.

FIG. 6 shows another embodiment of the invention.

In this figure, a spacer 18A is provided on the bottom surface of the piece 16 of the pin bobbin 10 along the pot core 20B only in a narrow portion of the piece 16.

Note that the other parts are the same as in the previous embodiment.

According to the embodiment of FIG. 6, the pin 17 and the pot core 20
Since the part with a narrow distance from B can be insulated and isolated, the same effect as in the above-mentioned embodiment can be achieved.

As mentioned above, according to the present invention, a bobbin with a pin, a core,
To obtain an inductance element that allows easy positioning of three parts of metal fittings, improves assembly workability, and improves insulation performance.

[Brief explanation of drawings]

Figure 1 is a perspective view of a typical bobbin with a pin used in conventional inductance elements, Figure 2 is a bottom view of the bobbin, and Figure 3 is a bottom view of the bobbin.
The figures are a perspective view showing an embodiment of the inductance element according to the present invention, FIG. 4 is a bottom view of the same, FIG. 5 is an exploded perspective view of the same, and FIG.
The figure is a bottom view showing another embodiment of the present invention. 1.10...Bobbin with pin, 2,13...
...Lower brim, 3.16... Piece, 4.17...
...Pin, 11...Top brim, 12...
Engaging portion, 14...Step, 15...Step surface, 18, 18A...Spacer, 20A, 20
B...Pot core, 30...Metal fittings, 4
0...Coil〇

Claims (1)

[Scope of utility model registration request] In an inductance element in which a bobbin with a pin for winding a coil is provided inside a set of pot cores, and the pot cores are tightened and integrated with a metal fitting, an engaging portion that engages with the pot core and the metal fitting is attached to the brim of the bobbin. A step is formed on the rib of the bobbin on the side where the pin is provided, and 1. a spacer is formed at the bottom of the piece formed on the rib to be in contact with at least a part of the pot core. inductance element.