JPH0668283U - Deflection yoke device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a deflection yoke device having a compensating coil for reducing a magnetic field leaking to the outside, in which the assembly process of the deflection yoke device is simplified and the productivity is excellent. A coil bobbin 10 is formed by injection molding or the like so that two rings 11 and 12 are formed in a shape that intersects in a substantially X shape, and a compensation coil 13 is connected in series to a horizontal deflection coil.
The two rings 11, 12 so that they are in opposite directions.
Winding is performed in the coil guide grooves 11a and 12a provided in the.
With the configuration in which the coil bobbin 10 wound in this way is attached to the outer peripheral portion of the deflection yoke, it is possible to obtain substantially the same magnetic field as that in which the ring-shaped compensating coils are provided independently above and below.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a deflection yoke device mounted on a cathode ray tube such as a television receiver or a CRT display device, and more particularly to a deflection yoke device provided with a compensation coil for reducing a magnetic field leaking to the outside.

[0002]

[Prior art]

 The deflection yoke attached to the cathode ray tube supplies a horizontal deflection current of about 15.75 KHz to 120 KHz to the horizontal deflection coil and a vertical deflection current of about 60 Hz to the vertical deflection coil. The electron beam is deflected by utilizing the horizontal and vertical deflection magnetic fields that are generated. At this time, a leakage magnetic field is also generated outside the deflection yoke, and a horizontal deflection magnetic field with a high frequency in the leakage magnetic field becomes unnecessary radiation, which may affect the human body and high-frequency compatible terminal equipment such as a computer. However, due to self-regulation, the deflection yoke itself was required to reduce unnecessary radiation.

In a conventional deflection yoke device, as shown in FIG. 6, a compensation coil 2 wound around a coil bobbin 1 formed in a ring shape by plastic injection molding or the like is used as shown in FIG. The magnetic field as indicated by the broken line arrow was generated by attaching two pairs at approximately symmetrical positions to the front end of No. 3 to cancel the leakage magnetic field from the horizontal deflection coil indicated by the solid line arrow. As shown in FIG. 8, the pair of compensation coils 2 are connected in series with the horizontal deflection coil 4 to generate a magnetic field that cancels the alternating magnetic field of the horizontal deflection frequency generated from the deflection yoke 3. I am letting you.

[0004]

[Problems to be solved by the device]

 However, in the conventional deflection yoke device, in order to generate the canceling magnetic field as described above, the compensating coil 2 wound in a ring shape is arranged at the upper and lower independent positions of the deflection yoke 3, so that Since it is difficult to wind the two compensation coils 2 in succession, the two compensation coils 2 are wound separately, and the four lead wires at the beginning and end of each compensation coil are placed horizontally. There was a problem that the work to connect to the deflection coil was necessary, the number of assembly processes increased, and the productivity was poor.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems of the conventional technology, the present invention provides (1) a deflection yoke device comprising a compensation coil for reducing a magnetic field leaking from the deflection yoke to the outside, wherein the compensation coil is a front surface of a cathode ray tube. As seen from the above, the deflection yoke is composed of first and second winding portions wound so as to surround the upper, lower, left, and right outer peripheral portions, and the first winding portion and the second winding portion are The first winding wire and the second winding wire portion are continuous and are formed by being wound in directions opposite to each other, and are connected in series to a horizontal deflection coil, and are connected to the first and second winding wires. The winding part is provided on the left and right sides of the deflection yoke, and the winding part of the deflection yoke is provided with intersecting parts. (2) Compensation for reducing the magnetic field leaking from the deflection yoke to the outside A deflection yoke device comprising a coil, wherein the compensation coil is a cathode The first winding portion and the second winding portion are formed by winding first and second winding portions so as to surround upper, lower, left and right outer peripheral portions of the deflection yoke when viewed from the front surface of the tube. And the first winding wire and the second winding wire portion are formed by being wound in opposite directions to each other, and are connected to the horizontal deflection coil in series, and The second winding part provides a deflection yoke device characterized in that it is a portion located on the left and right sides of the deflection yoke and intersects with each other in a substantially X shape. (3) Leakage to the outside from the deflection yoke A deflection yoke device comprising a compensation coil for reducing a magnetic field, wherein the compensation coil includes first and second winding coils wound so as to surround upper, lower, left and right outer peripheral portions of the deflection yoke when viewed from the front surface of the cathode ray tube. The first winding portion and the second winding portion are continuous, The first winding part and the second winding part are formed by being wound in opposite directions to each other, and are connected in series to the horizontal deflection coil, and the first and second winding parts are provided with a deflection coil. Provided is a deflection yoke device characterized in that it is provided with portions that are located on the left and right sides of the yoke and that intersect with portions that extend along each other.

[0006]

【Example】

 Hereinafter, the deflection yoke device of the present invention will be described with reference to the accompanying drawings. 1 is a schematic side view showing a deflection yoke device of the present invention, FIG. 2 is a schematic perspective view showing a coil bobbin of a compensation coil used in the deflection yoke device of the present invention, and FIG. 3 is a schematic view showing another coil bobbin of the present invention. FIG. 4 is a perspective view showing a deflection yoke device having the coil bobbin shown in FIG. 3, and FIG. 5 is a schematic side view showing another embodiment of the present invention.

First, the coil bobbin of the compensation coil used in the deflection yoke device of the present invention will be described. As shown in FIG. 2A, the coil bobbin 10 is formed by plastic injection molding or the like so that the two rings 11 and 12 intersect in a substantially X shape. 2A, the thickness of the coil bobbin 10 is shown in a simplified manner, and the sectional shapes of the rings 11 and 12 of the coil bobbin 10 are as shown in FIG. 2B. Coil guide grooves 11a and 12a for winding the compensation coil 13 are provided over the entire circumference.

Referring again to FIG. 2A, when the compensation coil 13 is wound around the coil bobbin 10, the coil 11 is wound in the direction of the arrow D from the intersection of the rings 11 and 12, and then the compensation coil 13 is wound. 13 is continuously wound on the ring 12 in the direction of the arrow E opposite to the direction of winding on the ring 11. Then, the winding of the ring 12 is terminated at the intersection where the coil is first wound, and the horizontal deflection coil is connected in series as in the conventional case. As described above, when the compensation coil 13 is wound on the coil bobbin having a substantially X shape, the windings on the same plane may be wound in two directions at different angles. Very easy to work with. FIG. 1 shows a deflection yoke device of the present invention in which the above-mentioned compensation coil is attached to the deflection yoke. As shown in FIG. 1, the compensating coil 13 continuously wound around the coil bobbin 10 serves as a magnetic field for canceling the leakage magnetic field generated from the deflection yoke. It is possible to generate almost the same magnetic field as the compensating coil 2 composed of a set.

Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4. The circuit board of the deflection yoke device is generally mounted above the deflection yoke body.Because the lead wire of the compensation coil is connected to the terminal etc. arranged on the board, I want to take it as high as possible and eliminate the waste of the leader line. Therefore, the wound coil compensation coil does not intersect at a single point, but as shown in FIG. 3, a coil bobbin 20 is formed in a certain range and having a portion 20a where the compensation coil coexists. In FIG. 3 as well, the thickness of the coil bobbin 20 is omitted in the same manner as in FIG. 2, and a coil guide groove (not shown) is provided over the entire circumference of the coil bobbin 20.

FIG. 4 is a side view of a deflection yoke device in which the coil bobbin 20 is attached to the deflection yoke 3. When the compensating coil 21 is connected to the connecting terminal 23 of the circuit board 22 mounted above the deflection yoke 3, the compensating coil 21 is connected to the upper end of the coil coexisting portion 20a. Can be shortened. Even with such a coil shape, it is possible to generate substantially the same magnetic field as the coil having the substantially X-shape shown in FIG.

Further, FIG. 5 is a schematic side view showing another embodiment of the present invention. As shown in FIG. 5, the coil bobbin is not used, and the compensating coil 31 is hooked on the hooking portion 32 provided on the coil separator 30 and wound so as to intersect in a substantially X shape in the direction indicated by the arrow. One or a plurality of the hooking portions 32 are provided inside the front end upper part, the front end lower part, the rear end upper part, and the rear end lower part of the coil separator 30, respectively. In such an embodiment, a coil having a substantially X shape as shown in FIG. 1 can be formed and a canceling magnetic field can be generated without using a coil bobbin.

[0012]

[Effect of device]

 As described in detail above, the deflection yoke device of the present invention is capable of continuously winding a magnetic field almost the same as the canceling magnetic field generated by the upper and lower independent compensation coils. In addition, the number of lead wires at the beginning and end of the compensation coil is reduced from four to two, which simplifies the work process and improves productivity. effective.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a deflection yoke device of the present invention.

FIG. 2 is a schematic side view showing a coil bobbin of a compensation coil used in the deflection yoke device of the present invention.

FIG. 3 is a schematic perspective view showing another coil bobbin of the present invention.

4 is a schematic side view showing a deflection yoke device to which the coil bobbin shown in FIG. 3 is attached.

FIG. 5 is a schematic side view showing another embodiment of the present invention.

FIG. 6 is a perspective view showing a conventional compensation coil.

FIG. 7 is a diagram showing a conventional deflection yoke device.

FIG. 8 is a circuit diagram showing connection of compensation coils.

[Explanation of symbols]

 3 Deflection yoke 10,20 Coil bobbin 13,21,31 Compensation coil 30 Coil separator 32 Hooking part

Claims (3)

[Scope of utility model registration request] 1. A deflection yoke device comprising a compensation coil for reducing a magnetic field leaking from the deflection yoke to the outside, wherein the compensation coil surrounds the outer peripheral portions of the deflection yoke in the upper, lower, left and right directions as viewed from the front surface of the cathode ray tube. The first winding part and the second winding part are continuous with each other, and the first winding part and the second winding part are continuous with each other. The second winding portion is formed by being wound in mutually opposite directions, and is connected in series to the horizontal deflection coil. The first and second winding portions are portions located on the left and right sides of the deflection yoke. A deflection yoke device, characterized in that the deflection yoke device comprises portions intersecting with each other. 2. A deflection yoke device comprising a compensation coil for reducing a magnetic field leaking from the deflection yoke to the outside, wherein the compensation coil surrounds an upper, lower, left and right outer peripheral portion of the deflection yoke when viewed from the front surface of the cathode ray tube. The first winding part and the second winding part are continuous with each other, and the first winding part and the second winding part are continuous with each other. The second winding portion is formed by being wound in mutually opposite directions, and is connected in series to the horizontal deflection coil. The first and second winding portions are portions located on the left and right sides of the deflection yoke. A deflection yoke device, wherein the deflection yoke devices intersect each other in a substantially X shape. 3. A deflection yoke device comprising a compensation coil for reducing a magnetic field leaking from the deflection yoke to the outside, wherein the compensation coil surrounds an upper, lower, left and right outer peripheral portion of the deflection yoke when viewed from the front surface of the cathode ray tube. The first winding part and the second winding part are continuous with each other, and the first winding part and the second winding part are continuous with each other. The second winding portion is formed by being wound in mutually opposite directions, and is connected in series to the horizontal deflection coil. The first and second winding portions are portions located on the left and right sides of the deflection yoke. A deflection yoke device comprising: a portion that intersects with each other and a portion that intersects with each other.