JP2546986Y2 - Deflection yoke - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a deflection yoke.
In particular, the present invention relates to a deflection yoke suitable for mounting on a cathode ray tube configured such that the outer diameter of the deflection yoke mounting portion on the linear portion side is smaller than the outer diameter of the electron gun housing portion.

[0002]

2. Description of the Related Art In recent years, the horizontal deflection frequency has been increased with the increase in the resolution of a cathode ray tube display. And
Heat generation in the deflection yoke due to the increase in the horizontal deflection frequency is a problem in terms of characteristics and safety.

One method of reducing the heat generated by the deflection yoke is to reduce the outer diameter of the neck of the cathode ray tube and the inner diameter of the deflection yoke. According to this method, since the deflection efficiency of the deflection yoke can be improved and the deflection current can be reduced, heat generation in the deflection yoke can be suppressed.
However, in the case of a cathode ray tube, if the diameter is reduced to the lens diameter of the electron gun, the focus characteristic deteriorates . The outer diameter is smaller than the outer diameter of the electron gun housing.

Therefore, the deflection yoke assembled alone cannot be directly inserted into the deflection yoke mounting portion from the electron gun housing portion side into the cathode ray tube configured as described above.

For this reason, the deflection yoke is mounted on the cathode ray tube by forming the deflection yoke with a plurality of dividable parts and assembling the divided parts at a deflection yoke mounting portion.

FIG. 5 is a schematic sectional view showing a state in which such a deflection yoke 51 is mounted on the cathode ray tube 11. As shown in the drawing, the cathode ray tube 11 is formed such that the outer diameter φ1 of the deflection yoke mounting portion 12 on the straight portion side is smaller than the outer diameter φ2 of the electron gun housing portion 13. A saddle-type horizontal deflection coil 52 constituting the deflection yoke 51; a toroidal-type vertical deflection coil 54 wound around a core 53;
2 and a separator 55 for insulating the vertical deflection coil 54 from each other are formed in pairs. It should be noted that only one of the pair is shown, and the other is omitted with a broken line.

[0007]

In the conventional deflection yoke, in order to mount the deflection yoke on the cathode ray tube, it is necessary to assemble each of the plurality of divided parts in the deflection yoke mounting portion, and it is necessary to separately assemble them in advance. The assembled deflection yoke could not be mounted directly.

[0008] Accordingly, there is a problem in that the workability of assembling the deflection yoke is poor, and it requires skill in operations such as crosstalk adjustment, convergence adjustment and distortion adjustment performed by attaching a ferrite sheet to the inner peripheral surface of the deflection yoke.

An object of the present invention is to provide a cathode ray tube having a deflection yoke mounting portion having a straight portion formed at least smaller than the outer diameter of the electron gun housing portion, which is preliminarily assembled with the deflection yoke alone, and each adjustment operation is simple. To provide a deflection yoke that can be easily mounted.

[0010]

The deflection yoke according to the present invention comprises a horizontal deflection coil and a vertical deflection coil which are mounted on a cathode ray tube whose outer diameter on the side of the straight portion of the deflection yoke mounting portion is smaller than the outer diameter of the electron gun housing portion. And a pair of inner horizontal deflection coils having at least a rear bend portion having an inner diameter smaller than an outer diameter of an electron gun housing portion of the cathode ray tube, and at least a rear bend portion having the electron bend. An outer horizontal deflection coil having a larger diameter than the outer diameter of the gun housing and having the inner horizontal deflection coil detachably fitted to the inner peripheral side thereof.

[0011]

In the deflection yoke of the present invention, the horizontal deflection coil has
A pair of inner horizontal deflection coils having at least a rear bend part side having an inner diameter smaller than the outer diameter of the electron gun housing part of the cathode ray tube;
An inner diameter larger than an outer diameter of the electron gun housing;
The pair of inner horizontal deflection coils are detachably fitted to the inner peripheral side of the pair of outer horizontal deflection coils. For this reason, the deflection yoke is assembled as a single deflection yoke by adjusting the mounting position of each deflection coil to the coil separator in advance. And, from the deflection yoke, the inner water
If only the flat deflection coil is removed and mounted on the deflection yoke mounting portion of the cathode ray tube, the deflection yoke from which the inner horizontal deflection coil has been removed is directly inserted from the electron gun housing portion side to the deflection yoke mounting portion side, and the inner horizontal deflection is performed. The coil and the outer horizontal deflection coil are fitted together and a deflection yoke is mounted.

As described above, since the deflection yoke is assembled independently, the workability of the crosstalk adjustment, the convergence adjustment, and the distortion adjustment work can be improved as well as the workability of assembling the deflection yoke to the cathode ray tube.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiment shown in the drawings. Note that this does not limit the present invention. FIG. 1 is a schematic sectional view illustrating a state in which a deflection yoke according to an embodiment of the present invention is mounted on a cathode ray tube. In the figure, reference numeral 11 denotes a cathode ray tube,
The outer diameter φ1 of the deflection yoke mounting portion 12 on the straight portion side 12A is formed smaller than the outer diameter φ2 of the electron gun housing portion 13.
Reference numeral 1 denotes a deflection yoke, which includes an inner horizontal deflection coil 2a, an outer horizontal deflection coil 2b, a core 3, a vertical deflection coil 4, and a separator 5 . In the drawings, only one of each pair is shown, and one of the pairs is omitted by a broken line.

As shown in FIGS. 1 and 2, the inner horizontal deflection coil 2a is a saddle-shaped coil formed by a mold winding having no bend-up portion on the electron gun housing portion 13 side of the cathode ray tube 11, and the inner diameter of the bend portion 2e side not I than the outer diameter φ1 of the linear portion 12A side of the deflection yoke mounting portion 12 of the cathode ray tube 11
Crab is formed large . The outer diameter of the rear bend portion 2e side of the inner horizontal deflection coil 2a is substantially equal to the outer diameter φ2 of the cathode ray tube 11 on the electron gun housing portion 13 side.

The inner horizontal deflection coil 2a thus formed is mounted on the cathode ray tube 11 so as to cover the outer periphery of the deflection yoke mounting portion 12, and fitted to the outer horizontal deflection coil 2b.

As shown in FIGS. 1 and 3, the outer horizontal deflection coil 2b is a saddle-shaped coil formed by a die winding having front and rear bend-up portions. The inner diameter of the outer horizontal deflection coil 2b is equal to the outer diameter φ of the electron gun housing 13.
It is formed larger than 2. The dimensions of each part are determined on the inner peripheral side of the outer horizontal deflection coil 2b so that the inner horizontal deflection coil 2a is detachably fitted.

When the outer horizontal deflection coil 2b thus formed is combined, it is formed into a substantially cylindrical body having an opening with an inner diameter larger than the outer diameter φ2 of the electron gun housing 13 of the cathode ray tube 11 at the front and back.

The vertical deflection coil 4 is toroidally wound around the core 3, and the outer horizontal deflection coil 2
b.

First, the deflection yoke 1 of the present invention is mounted on the inner peripheral side of the pair of separators 5 while positioning the pair of outer horizontal deflection coils 2b. Next, a pair of inner horizontal deflection coils 2 is provided on the inner peripheral side of the pair of outer horizontal deflection coils 2b.
a is adjusted by positioning. At this time, the inner horizontal deflection coil 2a is positioned by the outer horizontal deflection coil 2b and is removably fitted to the outer horizontal deflection coil 2b. Then, the vertical deflection coil 4 is positioned and mounted on the outer peripheral side of the separator 5, and the single deflection yoke 1
Assembled as

In order to mount the thus assembled deflection yoke 1 on the cathode ray tube 11, first, a pair of inner horizontal deflection coils 2a are removed from the deflection yoke. Then, each of the removed pair of inner horizontal deflection coils 2a is connected to the cathode ray tube 1
The deflection yoke mounting portion 12 is mounted on the deflection yoke mounting portion 12 so as to cover the outer periphery of the deflection yoke mounting portion 12. Next, the deflection yoke 1 with the pair of inner horizontal deflection coils 2a being removed.
Is inserted directly from the electron gun accommodating portion 13 side of the cathode ray tube 11 to the deflection yoke mounting portion 12 side. The inner horizontal deflection coil 2a is fitted on the inner peripheral side of the outer horizontal deflection coil 2b.

Since the mounting positions of the coils of the deflection yoke mounted in this manner are adjusted in advance and aligned, the adjustment of crosstalk, convergence , distortion, etc. is performed on average, and the adjustment workability is improved. Is done.

In the embodiment, the horizontal deflection coil is formed by winding a die, but may be wound by a bobbin.

Furthermore, although the vertical deflection coil has been described as an example of a toroidal type, it may be of a saddle type or a bobbin.

[0024]

According to the deflection yoke of the present invention, it is preferable to mount the deflection yoke to the cathode ray tube having a smaller outer diameter than the outer diameter of the electron gun housing at least by a simple means. As a result, there is an effect that the deflection yoke with improved crosstalk, convergence and distortion adjustment workability can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view illustrating a mounting state of a deflection yoke according to the present invention.

FIG. 2 is a perspective view of an inner horizontal deflection coil.

FIG. 3 is a perspective view of an outer horizontal deflection coil.

FIG. 4 is an example of a connection diagram of a horizontal deflection coil according to the present invention.

FIG. 5 is a schematic cross-sectional view illustrating a mounting state of a conventional deflection yoke.

FIG. 6 It is a perspective view of a cathode ray tube.

[Explanation of symbols]

 Reference Signs List 1 deflection yoke 2a inner horizontal deflection coil 2b outer horizontal deflection coil 3 core 4 vertical deflection coil 5 separator 11 cathode ray tube 12 deflection yoke mounting part 13 electron gun storage part

Claims (1)

(57) [Scope of request for utility model registration] 1. A deflection yoke comprising: a horizontal deflection coil and a vertical deflection coil mounted on a cathode ray tube having an outer diameter on a linear portion side of a deflection yoke mounting portion smaller than an outer diameter of an electron gun housing portion; The coil has an inner diameter smaller than the outer diameter of the electron gun housing portion of the cathode ray tube at least on the rear bend portion side.
A pair of inner horizontal deflection coils, and at least a rear bend portion having an inner diameter larger than the outer diameter of the electron gun housing portion, and an outer horizontal deflection removably fitted to the inner circumference of the pair of inner horizontal deflection coils. A deflection yoke comprising a coil.