JP3460427B2 - Deflection yoke - Google Patents

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 cathode ray tube device, and more specifically, it can reduce a leakage electric field from the deflection yoke.

[0002]

2. Description of the Related Art In recent years, the effect of high (low) frequency electric fields on nearby electronic devices and human bodies has become a hot topic. In a cathode ray tube device or the like, the horizontal deflection coil of the deflection yoke corresponds to the vertical deflection coil and is responsible for swaying the electron beam of the cathode ray tube to the left and right, but since the deflection cycle is significantly higher than the vertical cycle, The applied pulse voltage becomes a high voltage, and a high frequency electric field is emitted from the deflection yoke to the outside by the pulse voltage.

FIG. 5 is an explanatory view of a conventional cathode ray tube device in which emission of an electric field is reduced. In this conventional example, the entire cathode ray tube device 1 is covered with a shield 3 fixed to a ground potential. With such a shield structure, the leakage electric field is reduced by the shield 3 without taking any measures against the deflection yoke 5, and it is possible to prevent the electronic device and the human body in the vicinity of the cathode ray tube device 1 from being affected.

FIG. 6 is a plan view of the deflection yoke as viewed from above,
FIG. 7 is a side view of the deflection yoke in which the terminal plate is divided.
As shown in FIG. 6, a terminal plate 7 for wiring a coil or the like used in the deflection yoke 5 is attached to the deflection yoke 5 at an upper side portion in use. This terminal board 7
, The terminal releases the leakage electric field (hereinafter, referred to as "field emission terminal") T _H is disposed. Generally, the field emission terminal T _H corresponds to a portion connected to a horizontal deflection coil or circuit. The field emission terminals T _H, the frequency 15kH _z ~120kH _z, 1.4kV~2.5kV
It emits a pulsed voltage of the order of magnitude.

Therefore, such a field emission terminal T _H is
As shown in FIG. 7, a separate terminal plate 9 is divided, and this separate terminal plate 9 is attached to a lower part of the deflection yoke 5 in a used state.
The leakage electric field could be reduced by utilizing the shielding effect due to (see FIG. 5).

[0006]

However, in the case of shielding the entire cathode ray tube device 1 as shown in FIG. 5, it is common to use a metal for the shield 3, which greatly increases the cost of parts. However, the weight becomes heavy, and various disadvantages such as the necessity of increasing the reliability in the mechanical design are generated. Further, as shown in FIG. 7, in the case where the terminal plates 7 and 9 are divided into two and the terminal plate 9 which emits the leakage electric field is disposed below the deflection yoke 5, the upper and lower sides of the deflection yoke 5 are Since the wiring w has to be provided on each side by soldering work, there is a problem that the number of parts increases, the number of work steps also increases, and the manufacturing cost increases. The present invention has been made in view of the above circumstances, and provides a deflection yoke capable of reducing a leakage electric field with a simple structure without providing a large shield and without dividing a terminal plate. The purpose is to reduce the manufacturing cost of the yoke and improve the workability of assembly.

[0007]

The structure of a deflection yoke according to the present invention for achieving the above-mentioned object is constituted by a vertical deflection coil and
A pair of low potential side ends corresponding to each of the horizontal deflection coils
A terminal board having a child and a high-potential side terminal, and the terminal board
Enclosed to reduce leakage of electric field from the terminal board
Elastically contacts the low-potential side terminal of the vertical deflection coil.
It has a terminal cover in which the contact piece is integrally formed of conductive material.
And are characterized. Or the vertical deflection coil and the horizontal deflection coil
A pair of low potential side terminal and high potential corresponding to each
A terminal plate having side terminals and an end surrounding the terminal plate
Connect the child cover to the horizontal deflection coil or circuit.
The field emission terminal surrounding the field emission terminal
The leakage of the electric field from the
The lower deflection side terminal of the vertical deflection coil and elastic
A shield plate with the contact piece that contacts is integrally formed of conductive material.
It is characterized by having.

In the deflection yoke having such a structure, the shield means surrounding the field emission terminal is provided on the terminal plate, and only the field emission terminal can be shielded, and the shield means is small and simple. Further, in the deflection yoke in which the terminal cover is provided with the shield means surrounding the field emission terminal, the shield means which is a single component is unnecessary. Further, in the deflection yoke in which the contact piece is provided instead of the lead wire,
The shield means is connected to the low potential terminal via the contact piece,
A shield structure can be constructed with a small number of parts. Then, the low-potential side terminal of the contact piece that contacts is used as the low-potential side terminal of the vertical coil arranged on the terminal plate, so that the contact piece is connected to the low-potential side terminal at the same time when the terminal cover is attached. Is possible.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a deflection yoke according to the present invention will be described in detail below with reference to the drawings. Figure 1 is a diagram showing a first reference example of the polarization direction yoke (A) is a plan view of the deflection yoke from the top (B) is a rear view of the deflection yoke from the rear. A terminal plate 13 for wiring such as a coil used in the deflection yoke 11 is attached to a portion on the upper side when the deflection yoke 11 is used. A field emission terminal TH (see FIG. 6) is arranged on the terminal plate 13.

The terminal plate 13 is provided with a shell 15 which is a conductive shield means for covering the field emission terminal T _H. The shell 15 is formed in a box shape, for example, and surrounds the field emission terminal T _H. As the material of the shell 15,
In order to reduce the influence on the deflection yoke 11 and the cathode ray tube characteristics, a semi-magnetic material such as aluminum, nickel, copper, stainless steel, or brass, a weak magnetic material, or the like is preferably used.

The shield means may be formed by molding a main body with a resin material and subjecting the surface or the inner surface of the main body to nickel plating or the like.

One end of a lead wire 17 is connected to the shell 15, and the other end of the lead wire 17 is connected to, for example, the ground potential of a cathode ray tube device (not shown).

According to the deflection yoke 11 according to this embodiment, the vicinity of the field emission terminal T _H is fixed to the ground potential, and only the field emission terminal T _H can be shielded. It is possible to prevent the electric field from leaking.

[0014] Figure 2 is a side view of a cathode-ray tube apparatus showing a second reference example of the polarization direction yoke, FIG. 3 is a view of a deflection yoke for use in a cathode ray tube apparatus of FIG. 2 (A) of the deflection yoke from the top The plan view (B) viewed is a rear view of the deflection yoke viewed from the rear. In the deflection yoke 21 according to this embodiment, a terminal cover 23 made of an insulating material for preventing electric shock is attached to the terminal plate 13 described above.

[0015] The terminal cover 23, so as to surround the field emission terminals T _H above, the shield plate 25 is a shielding means is attached. Shield plate 25 may be one that surrounds the whole of the terminal cover 23, but as only field emission terminals T _H as shown in FIG. 3 can be surrounded only partially desired portion of the terminal cover 23 It may be attached.

The shield means used in this embodiment may be a foil material other than the shield plate 25 such as a sheet metal material.

Further, the shield means may be one in which nickel plating or the like is selectively adhered to the surface of the terminal cover 23 made of a resin material.

The material of the shield plate 25 is aluminum, nickel, copper, stainless steel, similar to the shell 15 described above.
A semi-magnetic material such as brass and a weak magnetic material are preferably used.

Shield plate 2 provided on the terminal cover 23
The lead wire 17 is connected to the fifth portion, and the lead wire 17 is connected to the ground potential of the cathode ray tube device circuit as in the case of the shell 15 described above.

According to the deflection yoke 21 of this embodiment, the reduction of the leakage electric field can be achieved, and the shield plate 25 is attached to the terminal cover 23 without forming the special shell 15, so that the field emission can be achieved. The terminal T _H can be surrounded.

[0021] Figure 4 is a view of a deflection yoke illustrating the implementation in the form of a deflection yoke according to the present invention (A) is a plan view of the deflection yoke from the top (B) is a rear view of the deflection yoke from the rear is there. In the deflection yoke 31 according to this embodiment, the terminal cover 23 is provided on the terminal plate 13 (see FIG. 1) as in the second reference example .

A power supply for the deflection coil is supplied to the terminal plate 13, and the power supply comprises two pairs of a high potential side and a low potential side of the horizontal coil and a high potential side and a low potential side of the vertical coil.
Here, the low potential side of the vertical coil has a voltage of about 2 to 3 V, which is sufficiently low without fear of electric shock. In this embodiment, the low potential side terminal T _{C of} this vertical coil is used as a substitute for the ground terminal.

A shield plate 33 as a shield means is attached to the terminal cover 23 so as to surround the above-mentioned field emission terminal T _H (see FIG. 6). A contact piece 35 having elasticity is integrally formed on the shield plate 33.
5 is a low potential side T of the terminal plate 13 that penetrates the terminal cover 23.
It is possible to contact _C.

The shield plate 33 is formed integrally with the terminal cover 23 or is attached to the terminal cover 23 with an adhesive or the like, and is also engaged with a locking means (not shown) (for example, a protrusion or a hole of the terminal cover 23). by elastic locking claws, etc.), a predetermined position of the terminal cover 23, i.e., or may be fixed at a position surrounding the field emission terminals T _H. In the shield plate 33, the relative position between the terminal cover 23 and the contact piece 35 is set so that the contact piece 35 is pressed against the low potential side terminal T _C at the same time when the terminal cover 23 is fixed.

According to the deflection yoke 31 of this embodiment, since the shield plate 33 is connected to the low potential terminal T _C of the vertical coil, the terminal T _H for emitting the leakage electric field has a low potential fixed potential. Shielded, above-mentioned deflection yoke 1
Like 1 and 21, the leakage electric field can be reduced.

Further, according to the deflection yoke 31, the contact piece 35 is connected to the low potential side terminal T _C at the same time when the terminal cover 23 is attached, so that the assembling property can be improved and the connection can be made. Since the lead wire and the like are unnecessary, the shield structure can be simply configured with a small number of parts.

Also in this embodiment, the terminal cover 23 and the contact piece 35 are integrally molded with a resin material or the like,
By selectively applying nickel plating or the like to this, the same effect can be obtained without using the shield plate 33. If the terminal cover 23 made of such a resin material plated with nickel is used, the terminal cover 23 can be formed in a complicated shape, and the weight and the cost of parts can be reduced.

Further, Shi Rudo means, terminals other than the grounding potential, for example, not limited to the low potential side terminal TC or the terminal TC of the vertical coils, which can be connected to any other terminal if occurring potential effective Is.

[0029]

As described above in detail, according to the deflection yoke of the present invention, the shield means surrounding the field emission terminal is provided on the terminal plate, and the shield means is connected to the ground potential. Only the terminals can be shielded, and the electric field can be prevented from leaking to the outside with a small and simple structure. As a result, the manufacturing cost of the deflection yoke can be reduced and the assembling workability can be improved. Further, according to the deflection yoke in which the terminal cover is provided with the shield means surrounding the field emission terminal, it is possible to surround the field emission terminal without manufacturing a single shield means. Further, in the deflection yoke in which the contact piece is provided instead of the lead wire, the shield means is connected to the low-potential terminal through the contact piece, so that the terminal that emits the leakage electric field is shielded at the low potential and the leakage electric field is reduced. Can be reduced. Further, since a connecting lead wire or the like is unnecessary, the shield structure can be configured with a small number of parts, and the parts cost can be reduced. Then, by making the low-potential-side terminal with which the contact piece contacts the low-potential-side terminal of the vertical coil arranged on the terminal plate,
At the same time when the terminal cover is attached, the contact piece can be connected to the low-potential side terminal, so that the assembling property can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a first reference example of a deflection yoke, FIG. 1A is a plan view of the deflection yoke seen from above, and FIG. 1B is a rear view of the deflection yoke seen from the rear.

FIG. 2 is a side view of a cathode ray tube device showing a second reference example of a deflection yoke .

3A is a diagram of a deflection yoke used in the cathode ray tube apparatus of FIG. 2, FIG. 3A is a plan view of the deflection yoke seen from above, and FIG. 3B is a rear view of the deflection yoke seen from the rear.

[4] The present invention in view of the deflection yoke illustrating the implementation in the form of a deflection yoke according to (A) is a plan view of the deflection yoke from the top (B) is a rear view of the deflection yoke from the rear.

FIG. 5 is an explanatory diagram of a conventional cathode ray tube device in which field emission is reduced.

FIG. 6 is a plan view of a deflection yoke as viewed from above.

FIG. 7 is a side view of a conventional deflection yoke in which a terminal plate is divided.

[Explanation of symbols]

11, 21, 31 Deflection yoke 13 Terminal plate 15 Shell (shielding means) 17 Lead wire
23 terminal cover 25, 33 shield plate (shield means) T _C low potential terminal T _H field emission terminal

Front page continuation (72) Inventor Yuki Yamaguchi 2nd Hinoguchi, Motomiya-cho, Adachi-gun, Fukushima Prefecture, within Sony Hongu Co., Ltd. (56) References JP-A-5-6743 (JP, A) JP-A-6-203767 ( JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01J 29/76

Claims (2)

(57) [Claims] 1. A vertical deflection coil and a horizontal deflection coil, respectively.
Correspondingly, a pair of low potential side terminal and high potential side terminal are arranged
Surrounding the terminal board and the terminal board installed , leakage of electric field from the terminal board is reduced.
The vertical deflection coil low potential side terminal and
And a terminal cover that is made of a conductive material
A deflection yoke having: 2. A vertical deflection coil and a horizontal deflection coil, respectively.
Correspondingly, a pair of low potential side terminal and high potential side terminal are arranged
The terminal plate provided, the terminal cover surrounding the terminal plate, and the portion connected to the horizontal deflection coil or the circuit.
Surrounding the field emission terminal of the
While reducing leakage, penetrate the terminal cover,
Contact for elastic contact with the low potential side terminal of the vertical deflection coil
Having a shield plate with one piece integrally formed of conductive material
Characteristic deflection yoke.