JPH07320658A - Deflection yoke - Google Patents

Abstract

PURPOSE:To eliminate the looseness at the time of installing a vertical deflection coil with a core ring on a slit bobbin of a horizontal deflection coil so as to smoothly rotate the vertical deflecting coil on the slit bobbin and so as to eliminate the generation of damage in the coating film of the vertical deflecting coil. CONSTITUTION:Pedestals 8 having a flat surface with a predetermined area are provided on the respective slit bobbins 1 as contact parts with a core ring of a vertical deflection coil, so that they receive the core ring part on the flat surface. Dispersion of the positioning of the vertical deflection coil in relation to the slit bobbin 1 and looseness thereof are thereby eliminated, and the rotation of the vertical deflection coil on the slit bobbin 1 can be smoothly performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke used in a television receiver (hereinafter referred to as a television) or the like.

[0002]

2. Description of the Related Art In recent years, various CRTs such as a wide-vision display, a high-definition display and a display with a short depth having an aspect ratio of 16: 9 have been developed, and a large number of deflection yokes are mounted on these CRTs. However, the components that make up the deflection yoke are being shared among TV models.

In addition, the vertical deflection coil of the deflection yoke and the horizontal deflection coil of the cathode ray tube are made to coincide with each other in the axial mechanical center to stabilize the electric characteristics (for example, Japanese Utility Model Publication No. 57-58685). Gazette, Actual Kaihei 1-
No. 81852).

The conventional deflection yoke will be described below. As shown in FIGS. 4 to 6, a slit-shaped winding frame is formed on the inner peripheral surface of a pair of slit bobbins 1, and a pair of SP (Slot wound Precision) horizontal deflection coils 2 are provided. Is provided. The horizontal deflection coil 2 has a configuration in which a conductor is wound around a slit-shaped winding frame to reduce variations during winding and improve accuracy. The slit bobbin 1 is a molded product made of resin such as polycarbonate, and plays a role as an electrically insulating component of the horizontal deflection coil 2 in addition to the role of the slit-shaped winding frame.

A ferrite core 4 around which a pair of semi-toroidal type vertical deflection coils 3 are wound is provided with a resin molding core ring 5 having a groove for regulating the winding position at the front and rear, and the outer periphery of the slit bobbin 1 is attached. It is arranged on the surface.

The horizontal deflection coil 2 and the vertical deflection coil 3 arranged on the outer periphery of the horizontal deflection coil 2 constitute a self-convergence deflection yoke. Reference numeral 6 in the figure is a neck cover for fixing the neck portion of the cathode ray tube and the deflection yoke.

In the deflection yoke constructed as described above, the position of the vertical deflection coil 3 with respect to the cathode ray tube axis affects the characteristics of the deflection yoke such as neck shadow and vertical distortion, and there is an appropriate position depending on the TV model. .
The slit bobbin 1 regulates the position of the slit bobbin 1.
A mold for the slit bobbin 1 is shared between different models of TVs by providing a toothed body of resin for position control, which is integrally molded with, and adjusting the height of the toothed body of the geta. I have been trying.

As shown in FIGS. 7 and 8, the toothed body of the geta is formed in a portion of the slit bobbin 1 for receiving the ferrite core 4 and the vertical deflection coil 3, and its shape has a width dimension of about 1 mm. Is formed by two parallel elongated elongated protrusions 7.

Due to the characteristics of the deflection yoke, the orthogonality of the magnetic fields of the vertical deflection coil 3 and the horizontal deflection coil 2 must be maintained. When the vertical deflection coil 3 is placed on the slit bobbin 1 during assembly, An appropriate position is searched while rotating the vertical deflection coil 3. At this time, the protrusion 7 and the core ring 5 that form the toothed body of the position control geta have a positional relationship as shown in FIG. 9, and therefore, when the vertical deflection coil 3 is rotated, The projections 7 hit each other and could not rotate smoothly, and the projections 7 directly hit the conducting wire of the vertical deflection coil 3. Since the way in which the conductor of the vertical deflection coil 3 enters the groove of the core ring 5 is not exactly uniform, the position of the vertical deflection coil 3 in the height direction varies.

Further, since the vertical deflection coil 3 is supported by the protrusion 7 having a width dimension of about 1 mm, the vertical deflection coil 3 rattles, and the variation in the position in the height direction is caused by the convergence characteristic of the deflection yoke. Unbalance of (convergence characteristics on the left and right and top and bottom of the screen in particular), deflection distortion and landing variations occur, and in the case of a deflection yoke for high-vision specifications, a litz wire with a wire diameter of about 0.1 mm is used. The coating of the conductive wire is easily damaged, and when the protrusion 7 directly contacts the conductive wire, the coating of the conductive wire may be damaged.

[0011]

According to the conventional structure in which the slit bobbin 1 is used in common with the mold as described above, the workability of assembling the deflection yoke is poor, the quality is deteriorated, and the reliability is lowered. I had a problem.

The present invention solves the above-mentioned problems of the prior art by providing a slit bobbin with a common die, and providing a highly reliable deflection yoke which is easy to assemble and does not deteriorate in quality. To aim.

[0013]

In order to achieve this object, the deflection coil of the present invention comprises a vertical deflection coil with a core ring on the outer peripheral portion of a slit bobbin having a horizontal deflection coil wound on the inner peripheral portion, In the slit bobbin, a pedestal having a flat surface with a predetermined area is provided in a portion where the vertical deflection coil contacts the core ring.

[0014]

In this structure, the core ring and the pedestal are in stable contact with each other, the variation in the position of the vertical deflection coil in the axial direction of the cathode ray tube is eliminated, and the horizontal deflection is performed without damaging the conducting wire of the vertical deflection coil. The vertical deflection coil can be smoothly rotated when the orthogonality with the coil is achieved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In one embodiment of the present invention, the same parts as those described in the above-mentioned conventional example are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 1, the feature of this embodiment lies in that a slender projection 7 for regulating the position of the vertical deflection coil 3 of the slit bobbin 1 is used as a pedestal 8 in the conventional construction described above. is there. That is, as shown in FIGS. 2 and 3, the pedestal 8 for regulating the position of the vertical deflection coil 3 is formed of polycarbonate at the contact portion with the core ring 5 of the slit bobbin 1 and is formed integrally with the slit bobbin 1. ing. The pedestal 8 has a horizontal dimension of about 10 mm and a vertical dimension of about 20.
The core ring 5 has a plane of a size in which a plurality of slits of the core ring 5 having a parallelepiped shape of 5 mm (shaded in FIG. 2A) are in contact, and the distance d between the pedestals 8 is about 40 mm h is
Depending on the TV model, the vertical deflection coil 3 and the ferrite core 4 are adjusted so as to be in proper positions.
Further, there is a draft in the molded product, and the slit bobbin 1
Since the height gradually decreases toward the edge of,
The position of the vertical deflection coil 3 is regulated at the point where the core ring 5 contacts.

Since the core ring 5 is supported by the pedestals 8 at a total of four positions, one on each side of the slit bobbin 1 and the other on the other side, rattling when the vertical deflection coil 3 is placed is suppressed.

Since the slits of the core ring 5 are in contact with the pedestal 8 one by one, the conductor wire of the vertical deflection coil 3 does not contact the slit bobbin 1, so that the conductor wire is not deteriorated.

As described above, according to this embodiment, by forming the pedestal 8 having a flat contact portion with the core ring 5 of the slit bobbin 1 on the slit bobbin 1, the die of the slit bobbin 1 is commonly used. In addition to improving the quality of the vertical deflection coil 3 without increasing the positional deviation of the vertical deflection coil 3 in the axial direction of the cathode ray tube and without damaging the conducting wire of the vertical deflection coil 3, the orthogonality with the horizontal deflection coil 3 is improved. The vertical deflection coil 3 can also be smoothly rotated.

[0021]

As is apparent from the above description, according to the present invention, the vertical deflection coil of the slit bobbin is provided with the vertical deflection coil with the core ring on the outer peripheral portion of the slit bobbin in which the horizontal deflection coil is wound around the inner peripheral portion. A slit bobbin can be shared by a structure in which a pedestal having a flat surface of a predetermined area is provided in the portion where the coil contacts the core ring, and the assembly workability is good, and the deflection yoke is highly reliable and does not deteriorate in quality. Can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view of one slit bobbin of a deflection yoke according to an embodiment of the present invention.

2A is a top view of the slit bobbin, FIG. 2B is a front view of the slit bobbin, and FIG. 2C is a side view of the slit bobbin.

FIG. 3 is a combined view of a slit bobbin of the deflection yoke and a vertical deflection coil.

FIG. 4 is a sectional view of a conventional deflection yoke.

FIG. 5 is a top view of the deflection yoke.

FIG. 6 is a side view of the deflection yoke.

FIG. 7 is a perspective view of one slit bobbin of the deflection yoke.

8A is a top view of the slit bobbin, FIG. 8B is a front view of the slit bobbin, and FIG. 8C is a side view of the slit bobbin.

FIG. 9 is a combined view of a slit bobbin of the deflection yoke and a vertical deflection coil.

[Explanation of symbols]

 1 slit bobbin 2 horizontal deflection coil 3 vertical deflection coil 5 core ring 8 pedestal

Claims (1)

[Claims] 1. A deflection yoke comprising a vertical deflection coil with a core ring on an outer peripheral portion of a slit bobbin wound with a horizontal deflection coil on an inner peripheral portion, wherein the vertical deflection coil of the slit bobbin is the core ring. The part that comes in contact with
A deflection yoke comprising a pedestal having a flat surface with a predetermined area.