JPS5824406Y2 - 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 having a coil wound therein is provided inside a pair of pot cores, and the pot cores are tightened and integrated with a metal fitting.

Conventionally, a structure in which a protrusion is formed on a part of the brim of a bobbin and the protrusion is engaged with a pot core to prevent rotation of the bobbin is generally known.

However, since the metal fitting for tightening and integrating the pot core and the bobbin are not related to each other, the metal fitting 1 has a bent part 2 for pressing the side surface of the pot core, as shown in Fig. 1. There is a need.

Therefore, the number of man-hours required to manufacture the metal fittings is high, resulting in high costs, and the work of tightening and fixing the pot core is troublesome.

In view of the above points, the present invention aims to provide an inductance element that allows easy positioning of the bobbin, core, and metal fittings and improves assembly workability.

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

2 and 3 show a first embodiment.

In these figures, fan-shaped notches A are symmetrically formed in the upper collar 11 of the bobbin 10, and an engaging portion 12 is formed perpendicularly and outwardly to the upper collar 11 along these notches A. has been done.

Similarly, an engaging portion 14 is also formed on the lower collar 13 of the bobbin 10.

A coil 15 is wound around the bobbin 10.

The pot cores 20A and 20B have a flat disk portion 21.
, an outer shell portion 22 integrally formed on the periphery thereof, and a cylindrical slug portion 23 integrally formed at the center of the disk portion 21, and the disk portion 21 has the same width as the slug portion 23. Alternatively, a substantially tapered portion is formed so as to have a smaller width.

The engaging parts 12 and 14 of the bobbin 10 are connected to the disc part 2.
1 so that it can be engaged with.

A metal fitting 30 for tightening and integrating the pot cores 20A and 20B has an upper surface 31 and both side surfaces 32 having U-shaped elastic curved surfaces, and a locking portion 33 with the tips of both side surfaces 32 bent inward. The upper surface 31 is formed such that at least a portion of the upper surface 31 is in contact with the inner surface of the engaging portion 12 of the bobbin 10 and can be held therein.

To assemble each member, the disk portions 21 of the pot cores 2OA and 20B are attached to the bobbin 10 provided with the coil 15.
The pot cores 20 A and 20 B are fitted from above and below so as to be engaged with the engaging parts 12 and 14, respectively, and further so that the upper surface 31 of the metal fitting 30 is engaged with the engaging part 12,
This is done by attaching the metal fittings 30 around the pot cores 20A, 20B and tightening the pot cores 20A, 20B together.

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

(1) Since the engaging portion 12 is formed on the bobbin 10 so that it can be secured to the pot core 20A and the metal fitting 30, positioning of the pot cores 20A, 20B and the metal fitting 30 is easy, and it is possible to improve assembly work efficiency. It is.

(2) The shape of the metal fitting 30 is simplified, and the number of man-hours and costs for manufacturing the metal fitting 30 can be reduced.

(3) Since the engaging portions 12.14 formed on the bobbin 10 cover the side portions of the pot cores 20A, 20B and the metal fittings 30, it is possible to insulate and protect the lead wire from the coil 15.

(4) Retaining portion 14 formed on the lower collar 13 of the bobbin 10
Due to the presence of the inductance element, a gap is created between the lower surface of the bot core 20B and the printed circuit board when the inductance element is attached to the printed circuit board.

Therefore, there is no problem of short-circuiting patterns on the printed circuit board.

FIG. 4 shows a second embodiment of the invention.

In this figure, the upper collar 41 of the bobbin with pin 40 has
Fan-shaped notches B are formed symmetrically, and a retaining part 42 extends perpendicularly to the upper collar 41 and outwards along the notches B.
is formed.

Further, a step 44 is formed on the lower collar 43 of the bobbin 40, so that a part of the inner surface of the lower collar 43 becomes a step surface 45 that is one step lower.

A piece 46 is formed on the stepped surface 45, and a pin 47 serving as a terminal is provided on the piece 46.

The pot cores 20A and 20B are respectively fitted into the pin-equipped bobbin 40 from above and below so that the disk portion 21 of the pot core 20A engages with the engaging portion 42 of the bobbin 40, and the upper surface of the metal fitting 30 is fitted into the above-mentioned bobbin 40. The metal fittings 30 are connected to the pot cores 20A and 20B so as to engage with the engaging portions 42.
is attached around the

According to the embodiment shown in FIG. 4, in addition to the effects of the above-mentioned embodiment,
By forming the step 44 on the lower collar 43 of the pin bobbin 40, there is an effect that the lead wire can be easily drawn out to the pin 47 and insulated.

5 and 6 show a third embodiment of the present invention.

In these figures, the upper collar 51 of the pin bobbin 50 extends to the inside of the engaging portion 52, and a narrow fan-shaped notch C is symmetrically formed therein.

Further, a step 54 is formed on the lower collar 53 of the bobbin 50 at a position corresponding to the cutout portion C, so that the lower collar 53
A part of the inner surface of No. 3 is a stepped surface 55 that is one step lower.

A piece 56 is formed on the stepped surface 55, and a pin 57 serving as a terminal is provided on the piece 56.

Furthermore, a spacer 58 is formed on the outer surface of the lower flange 53 and projects along the pot core 20D.

This spacer 58 eliminates the inconvenience that the winding part of the pin 57 directly touches the mounting board, and also ensures the necessary creepage distance between the winding part and the pot core 20D.

Pot cores 20C and 20D are fitted into such a bobbin 50 with a pin from the top and bottom, respectively, and a metal fitting 30A is fitted into the bobbin 50 with a pin.
pot core 20C so that it engages with the engaging portion 52,
It is attached around the 20D.

According to the third embodiment, since the widths of the notch C and the stepped surface 55 are narrowed, there is an advantage that winding is easy even when the wire diameter of the winding wire is small.

As shown above, according to the present invention, an inductance element is obtained in which the positioning of the bobbin, core, and metal fittings is easy and the assembly workability can be improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a metal fitting for integrating core tightening in a conventional inductance element, Fig. 2 is a perspective view showing a first embodiment of the inductance element according to the present invention, and Fig. 3 is an exploded perspective view of the same. , FIG. 4 is an exploded perspective view showing a second embodiment of the present invention, FIG. 5 is an exploded perspective view showing a third embodiment, and FIG. 6 is a bottom view of the same. 1.30.30A...Metal fittings, 10...
Bobbin, 11.41. 51... Upper brim, 12, 14, 42.52...
...Engagement part, 13,43゜53...Lower rib, 15...Coil, 20A to 20 D...
... Pot core, 40.50 ... Bobbin with pin, 44.54 ... Step, 45.55 ...
...Step surface.

Claims (1)

[Scope of utility model registration request] In a set of pot cores, a part of which is approximately tapered so that the disk part has the same width or a smaller width than the slug part,
In an inductance element comprising a bobbin for winding a coil and integrally tightening the pot core with a metal fitting, at least one brim of the bobbin has a substantially tapered shape having the same width or a width smaller than that of the slug portion of the pot core. An inductance element characterized in that a fan-shaped engaging portion is formed outward so as to engage with the disk portion and the metal fitting, both of which are formed as a part of the disk portion.