JPH04116111U - linearity coil - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a linearity coil that is stably supported on a substrate against horizontal vibration. [Structure] A coil 3 is wound around a magnetic core 1 which has flanges at both ends of a columnar winding part, and its terminal is tied around the base of a lead wire 2 planted in one of the flanges, and the coil 3 is wound around a pair of flanges of the magnetic core 1. The lower ends of the pair of magnets 4, 4 for magnetic bias to be joined are made to protrude from the collar to the same level as or lower than the tangled part of the lead wire 2, and when placed on the board 5, the bottom ends of the pair of magnets 4, 4 are The linearity coil is supported by the end face and the lead wire 2 soldered to the conductive part of the board 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to linearity coils used in television receivers, for example. Ru.

0002

[Conventional technology]

Conventionally, as shown in FIG. A magnet b is attached to the outer surface of the tsuba, and a pair of lead wires c and c are planted on the outer surface of the lower tsuba. Then, tie the ends of the coil d wound around the columnar winding part to the lead wires c and c, and linearly To ensure stability of the coil on the printed circuit board (not shown), a magnetic coil is attached. A is glued onto a resin base e, and lead wires c and c are led out from the bottom surface of the base e. I was trying to do that.

0003

[Problem that the idea aims to solve]

According to the conventional linearity coil, the magnet b is located on the top of the magnetic core a, and If a large magnetic bias is applied to the magnetic core, the center of gravity will be on the upper side. Therefore, there was still concern about stability against horizontal vibrations. This invention The purpose of this is to eliminate these disadvantages of conventional linearity coils. It is something to do.

0004

[Means to solve the problem]

In order to achieve the above object, the present invention has developed a magnetic core with flanges at both ends of the columnar winding part. In a linearity coil formed by bonding a magnet to a core, the outside of the flange of the magnetic core A lead wire is planted perpendicularly to the outer surface of the surface, and a pillar of the magnetic core is attached to the lead wire. The ends of the coil wound around the shaped winding core are tied together, and the magnet is joined to a pair of flanges of the magnetic core. At the same time, one end surface in the length direction is connected to the tangle of the lead wire from the outer surface of the collar. It is made to protrude at the same level or lower than the part.

[0005]

[Effect]

The magnet is not attached to the upper collar of the magnetic core, but to the upper and lower collars. The center of gravity then moves downward. The lower end face in the length direction of the magnet is connected to the lip provided on the lower flange. The lead wire is made to protrude from the coil end, making it easy to place the lead wire on the printed circuit board. When soldered to the wire part, the linearity coil is located below the pair of lead wires and the magnet. The end face is stably supported on the printed circuit board.

[0006]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is made of ferrite, for example, and has flanges at both ends of a columnar winding part. It is a magnetic core, and a pair of lead wires 2 are planted perpendicularly to the outer surface of the lower collar. The terminal of the coil 3 wound around the columnar winding part is tied to this lead wire 2, and the end of the coil 3 is wound in half. It is being planted. The magnetic core 1 is joined to a pair of flanges so as to sandwich the pair of flanges. A pair of arc-shaped plate-shaped magnets 4 are provided, and the lower end surfaces of the pair of magnets 4, 4 are provided. protrudes from the lower collar of the magnetic core 1 by approximately the same length as the tangled portion of the lead wire 2. It is. According to this configuration, it is mounted on the printed circuit board 5 and the lead wire 2 is inserted through the hole 6. When soldered to the wiring part, the linearity coil is connected to a pair of magnets 4 and 4 and a pair of leads. It is stably supported by the lead wires 2, 2.

[0007] Note that a ring-shaped magnet can be used instead of the pair of arc-shaped plate-shaped magnets. .

[0008] 2 and 3 show another embodiment of the present invention using one arc-shaped plate magnet. In the one shown in FIG. 2, the magnet 4a regulates the protrusion length from the lower collar of the magnetic core 1. This is an example in which a stepped portion 7 is formed for the purpose of In addition, a step 8 that engages with the upper collar is formed to reduce the length of the protrusion from the lower collar. This is an example in which the magnetic resistance of the magnet 4b to the magnetic flux is reduced.

[0009] FIG. 4 shows still another embodiment of the present invention using one rectangular parallelepiped magnet. In this embodiment, the magnet 4c has a magnetic surface attached to the magnetic core 1 with an adhesive. An arcuate surface is formed so as to be in close contact with the two flanges of the magnetic core 1, and the lower flanges of the magnetic core 1 It protrudes from the lead wire 2 by approximately the same length as the tangled portion of the lead wire 2.

0010

[Effect of the idea]

Since the present invention is configured as described above, it is possible to prevent horizontal vibrations from occurring on the board. It has the effect of being stably supported.

[Brief explanation of drawings]

[Figure 1] Cross-sectional view of one embodiment of the present invention

[Fig. 2] Cross-sectional view of another embodiment of the present invention

[Figure 3] Cross-sectional view of a modification of the linearity coil shown in Figure 2

[Figure 4] A perspective view of another modification of the linearity coil shown in Figure 2.

[Figure 5] Cross-sectional view of a conventional linearity coil

[Explanation of symbols]

1 Magnetic core 2 Lead wire 3 coil 4 magnet 5 Printed circuit board

Claims (1)

[Scope of utility model registration request] [Claim 1] A linearity coil formed by joining a magnet to a magnetic core having a flange at both ends of a columnar winding part, in which a lead wire is planted perpendicularly to the outer surface of the flange of the magnetic core. Then, the end of the coil wound around the columnar winding part of the magnetic core is tied to the lead wire, the magnet is joined to the pair of flanges of the magnetic core, and one end surface in the longitudinal direction is connected to the lead wire.
A linearity coil that is made to protrude from the outer surface of the collar to the same level as or lower than the tangled part of the lead wire.