JPH0211710Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a deflection yoke suitable for use in an in-line color picture tube.

(b) Prior Art As shown in FIGS. 7 and 8, a conventional deflection yoke has a coil separator 1 equipped with a horizontal deflection coil (not shown) inside, a toroidal ferrite core 3 and a vertical coil 4 on the outside. A first portion 6 to which the vertical coil device 2 is attached and which is close to the left and right sides of the vertical coil device 2, and a second portion 7 extending forward at the corners of the deflection yoke corresponding to the four corners of the screen. A magnetic plate 5 consisting of a magnetic plate 5 was fixed to the enlarged front portion 8 of the coil separator 1.
The magnetic plate 5 is provided to apply a pink tension magnetic field to the electron beam at the corner to correct raster pink tension distortion, and the first portion 6 prevents leakage from the vertical coil device 2. It absorbs the magnetic field, sends it to the second part 7, and causes the second part to apply the magnetic field to the electron beam. At this time, the effective magnetic field of the vertical coil device 2 that acts on the electron beam has a barrel shape on the opening side (front side) of the deflection yoke, and the pink tension magnetic field by the magnetic plate 5 distorts the raster into a pink tension shape. Therefore, it is corrected. Such a deflection yoke is known, for example, from Utility Model Application No. 58-91944 (Utility Model Application No.
59-195659).

Incidentally, when attaching the magnetic plate 5, as shown in FIG. 9, displacement in the X direction is prevented by a locking part 10 formed on the rising part 9 of the front enlarged cylindrical part 8 of the coil separator 1, and the coil separator The magnetic plate 5 is fitted into the housing part 11 formed in the magnetic plate 1 by fitting into the fitting part 12 of the magnetic plate 5 so as to prevent displacement in the Y direction and the Z direction.

The magnetic plate mounting portion will be described in more detail with reference to FIGS. 9 to 11. The locking portion 10 consists of an elastic tongue piece 10a extending toward the center of the tube axis from the outside and a protrusion 10b at the tip thereof.
In order to make a elastically deformable, it is necessary to form a space around it.

On the other hand, conventionally, when molding a coil separator with resin, a female mold is placed on the outside of the coil separator and a male mold is placed on the inside, and the male mold is pulled out in the horizontal direction as shown in Figure 10. The elastic tongue piece 1
In order to form a space around 0a, it is necessary to provide a protrusion corresponding to this space on the male die, and to remove this protrusion in the horizontal direction.

Therefore, a molded hole 13 is formed in the vicinity of the elastic tongue piece 10a on the rising portion 9, passing through the inside and outside of the coil separator on the rising portion 9 having a shape as shown in FIG.

Therefore, as shown in FIG. 10, there was a drawback that the insulation level between the vertical coil 2 or the magnetic plate 5 and the horizontal coil 14 was lowered.

(c) Problems to be solved by the invention This invention solves the above-mentioned drawbacks, and even if the coil separator is molded, the insulation level between the vertical coil or magnetic plate and the horizontal coil is reduced. It provides a deflection yoke that does not.

(d) Means for solving the problem The deflection yoke of the present invention has an upright wall that is approximately perpendicular to the upright portion at a position slightly set back in the direction of the tube axis from the front enlarged cylindrical portion, and a vertical wall that extends from the upright wall toward the tube axis. The coil separator is integrally molded with an elastic tongue extending in a direction opposite to the center and having a protrusion at its tip.

(e) Effect By the above-mentioned means, in the deflection yoke of the present invention, molding holes are not formed on the rising portion when the coil separator is molded with resin.

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3 showing a plan view, a side view, and a perspective view of essential parts of the deflection yoke in this embodiment, parts that are the same as those in the conventional example are given the same figure numbers, and explanations thereof will be omitted.

In the figure, an elastic tongue piece 15c extends outward from the tube axis side to lock the insertion part 12 of the magnetic plate 5 on the rising part 15b of the front enlarged cylindrical part 15a of the coil separator 15. and a protrusion 15 at its tip.
d is formed to prevent displacement in the X direction. Furthermore, a storage section 15 that holds both sides of the fitting section 12 is provided.
e, 15e are formed to prevent displacement in the Y direction.

Further, a pair of first tongue pieces 7a, 7a extending in the circumferential direction from the second portions 7, 7 of the magnetic plate are formed by a pair of protrusions 15f, 15f protruding outward from the rising portion 15b. Locks and prevents displacement in the Z direction.

A feature of this embodiment is that the elastic tongue piece 15c extends outward from the tube axis side. That is, as shown in FIG. 4, a part of the front enlarged cylindrical portion 15a moves back a little toward the tube axis direction, and forms the upright wall 15g.
is formed. This upright wall 15g extends downward at a substantially right angle from the rising portion 15b and is connected to the pair of side walls 15h, 15h. The elastic tongue piece 15c is connected to the upright portion 15b and the upright wall 15g.
Approximately the rising portion 15 extends outward from the connection point with
It extends flush with b. Furthermore, the elastic tongue piece 1
A space is formed around 5c to enable elastic deformation, but a molding hole is not formed above the rising portion 15b, which is formed during molding, as in the prior art.
That is, the space around the elastic tongue piece 15c and the inside of the coil separator 15 are isolated by the upright wall 15g.

Therefore, as shown in FIG. 4, the vertical coil 2 and magnetic plate 5 are insulated from the horizontal coil 14 by a portion of the rising portion 15b.

Next, molding of a coil separator having the above-mentioned shape will be explained.

In order to form a space around the elastic tongue piece 15c, a protrusion is provided in a female mold located outside the coil separator 15. The male mold only needs to be provided with a protrusion for forming the protrusion 15d on the elastic tongue, and the coil separator 15 only needs to have a minute molded hole 15i formed by the protrusion.

Furthermore, in this embodiment, as shown in FIGS. 5 and 6, a pair of second tongue pieces 7b, 7b is formed in the circumferential direction on both outer sides of the second portion 7 of the magnetic plate 5.
b, 7b are locked by locking pieces 15j, 15j extending outward from the rising portion 15b in an L-shape. The inside of these locking pieces 15j, 15j is a cylindrical surface, and the inner diameter thereof is designed to be slightly smaller than the outer diameter of the second tongue, so that the second tongue is pressed in the tube axis direction, and the magnetic This prevents rattling at both ends of the body plate 5.

(g) Effects of the invention As described above, according to the invention, since no molded holes are formed on the rising part of the magnetic plate attachment part of the coil separator, the insulation between the vertical coil and the magnetic plate and the horizontal coil is reduced. A highly reliable deflection yoke can be realized.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a deflection yoke according to an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a perspective view of the same main part, FIG. 4 is a perspective view of the end of a magnetic plate, and FIG. The figure is a sectional view taken along line A-A' in Figure 1, and Figure 6 is a cross-sectional view taken along line B-- in Figure 2.
B' sectional view, Figure 7 is a plan view of a conventional deflection yoke,
8 is a side view of the same, FIG. 9 is a perspective view of the locking portion, FIG. 10 is a sectional view taken along line C-C' in FIG. 7, and FIG. 11 is a plan view of the locking portion. 2...Vertical coil, 14...Horizontal coil, 5...
...Magnetic plate, 1, 15...Coil separator, 1
5c...Elastic tongue piece, 15d...Protrusion, 15e, 1
5e...Storage section, 15g...Upright wall, 15h, 1
5h...side wall.

Claims (1)

[Scope of utility model registration request] a first portion that absorbs a leakage magnetic field due to the vertical coil in proximity to the left and right side portions of the vertical coil, which is formed by winding a vertical coil around a toroidal ferrite core;
At the corners of the deflection yoke corresponding to the four corners of the screen, there is provided a magnetic plate consisting of a second portion that extends forward and applies a pink tension magnetic field to the electron beam at the corner, and is substantially perpendicular to the first portion of the magnetic plate. In a deflection yoke in which a fitting portion is formed that is bent in the direction of the coil separator and is locked with a locking portion formed on a rising portion of the front enlarged cylindrical portion of the coil separator, An upright wall substantially orthogonal to the upright portion at a slightly retracted position, and an elastic tongue extending from the upright wall in a direction opposite to the center of the tube axis and having a protrusion at its tip are integrally molded on the coil separator, A deflection yoke formed by locking the fitting portion with a tongue piece.