KR100439638B1 - Deflection yoke apparatus - Google Patents

Abstract

An object of the present invention is to provide a high quality deflection yoke device capable of achieving both a suppression of a magnetic field that does not contribute to the deflection of an electron beam and the ease of a holding structure.

As a deflection coil, the deflection coil 10 which provided the small band 14 only in the front part was used. The deflection coil 10 is wound into a coil separator by using the front side small band 14 of the deflection coil 10 and the tongue piece 26 or the constriction provided in the front side box portion 23 of the coil separator 20. 20) can be easily and reliably mounted, and it is possible to maintain an effect of suppressing unnecessary magnetic fields that do not contribute to the deflection of the electron beam.

Description

Deflection Yoke Device {DEFLECTION YOKE APPARATUS}

BACKGROUND OF THE INVENTION The present invention relates to a deflection yoke device in which a horizontal deflection coil can be easily and reliably mounted to a coil mounting frame even when a bandless type is employed as, for example, a horizontal deflection coil. will be.

Currently, cathode ray tubes (hereinafter, referred to as CRTs) and liquid crystal display panels are mainly used as display devices such as television receivers. In the display device employing the CRT, a deflection yoke device is used to deflect the electron beam of the CRT.

Various improvements have also been made in this deflection yoke device, and in recent years, development of a deflection yoke device with high precision and easy assembly has been performed.

The conventional deflection yoke device is mounted at a position that transitions from the neck portion of the CRT to the cone portion, and each coil has a troidle in a pair of segmented troidal cores. (troidal) winding to form a pair of vertical deflection coil (vertical deflection coil), and also for the horizontal deflection coil divided into two coils each in a saddle (saddle) form a pair of horizontal deflection coil, The cone-side and neck-side ends were raised outward with respect to the tube axis to form a front bend portion and a neck bend portion, respectively.

These horizontal deflection coils and vertical deflection coils were mounted on the inner and outer sides of a coil separator as a coil mounting frame composed of two divided synthetic resins, and the two deflection coils were separated and positioned by the coil separator.

Specifically, a pair of horizontal deflection coils is disposed inside the coil separator having a shape that extends from the neck side to the front side, and each band portion of the neck side and the front side of the horizontal deflection coil is provided at each band storage portion of the coil separator. It accommodates and holds and positions a horizontal deflection coil. On the other hand, in the vertical deflection coil, a pair of vertical deflection coils wound around the core in a trolley shape is arranged outside the coil separator and positioned, and the deflection yoke device is configured by fixing the core.

Fig. 6 shows an example of the horizontal deflection coil having the band portion described above. FIG. 6A is a perspective view schematically showing the appearance of the horizontal deflection coil 60, and FIG. 6B is a side view.

The horizontal deflection coil 60 shown in FIG. 6A bends outward portions 61 and 61 which generate a horizontal deflection magnetic field as a function of the deflection yoke, and an overhead connection wire which does not contribute to the deflection of the electron beam. And the band portions 62 and 63 formed thereon. Reference numeral 64 denotes a window portion of the wound coil.

The advantage of such a deflection coil is that the band portions 62 and 63 can be used for the positioning mechanism in the axial direction, and both ends of the horizontal deflection coil are bent to form the band portions 62 and 63, thereby reducing the overall length of the horizontal deflection coil. It can be mentioned. On the other hand, there is a problem in that the band portions 62 and 63 generate a magnetic field (621, 631 (see FIG. 6 (b)) which does not contribute to the deflection of the electron beam).

Moreover, the bandless type deflection coil which flattened the said band part 62 and 63 is also used generally. In the bandless type deflection coil, since the entire coil has a shape along the CRT tube surface, generation of a magnetic field that does not contribute to the deflection of the electron beam can be suppressed compared to the deflection coil having the band portion, and the deflection sensitivity can be improved. It is effective.

However, because of the bandless structure, positioning becomes difficult when the deflection coil is held in the coil separator, and there is a problem that coating film breakage of the coil wire may occur because an adhesive is used as a method of fixing the coil.

On the other hand, as a prior art of a deflection yoke having a bend-up type deflection coil, there is one described in Japanese Patent Laid-Open No. 10-64449. The publication applies a deflection yoke for winding a horizontal deflection coil and a vertical deflection coil in a saddle shape so that the convergence characteristics and the image distortion characteristics can be easily and easily matched with the funnel when viewed from the display screen side of the cathode ray tube. It is described to form the deflection coils H such that the band (funnel bend: front-bend) becomes a circular rectangle. However, the bandless type deflection coil and the holding structure in the case of employing such a deflection coil, the method of suppressing the unnecessary magnetic field generated when the band is formed on the front side, and the like are not described at all.

As mentioned above, in the conventional bandless type deflection coil (especially when using as a horizontal deflection coil), there existed a problem that the holding structure to a coil separator was difficult.

Accordingly, an object of the present invention is to provide a higher quality deflection yoke device that can achieve both of the suppression of a magnetic field that does not contribute to the deflection of an electron beam and the ease of a holding structure.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the deflection yoke apparatus of one Embodiment of this invention.

2 is an exploded perspective view of the deflection yoke device;

3 illustrates one embodiment of a retaining structure for holding a small band.

4 shows another embodiment of a retaining structure for holding a small band.

5 is a diagram illustrating an internal structure of a coil separator for explaining a method of fixing a deflection coil in a direction other than the tube axis direction of the coil separator.

6 shows a horizontal deflection coil of the bandup type.

<Explanation of symbols for main parts of drawing>

10: bandless type deflection coil

14: small band

20: coil separator (coil mounting frame)

23: front side box part

26: tongue

27: turning

The deflection yoke device according to the present invention is mounted on the outer circumference of the cathode ray tube, forms a shape that extends from the neck side of the cathode ray tube toward the front side, and generates a main body portion and a neck side overhead connection wire and front side over which a deflection magnetic field is generated. It has a head connection wire, The said neck side overhead connection wire is a bandless structure, The deflection coil which formed the small band at the front end part by making most of the front side overhead connection wire into a bandless structure is characterized by the above-mentioned. It is done.

In addition, the deflection yoke apparatus according to the present invention is mounted on the outer circumference of the cathode ray tube, forms a shape that extends from the neck side of the cathode ray tube toward the front side, and generates a main body portion and a neck side overhead connection wire and front which generate a deflection magnetic field. A deflection coil having a side overhead connection wire, the neck side overhead connection wire having a bandless structure, and a majority of the front side overhead connection wire having a bandless structure, and forming a small band at the front end;

A mounting frame having a shape that extends from the neck side toward the front side and to which the deflection coil is mounted, comprising a coil mounting frame having a holding part for holding a band of the deflection coil on the front side of the mounting frame. It is done.

According to the above invention, by providing a small band only in the front portion of the deflection coil, the structure for holding the deflection coil in the coil mounting frame while almost maintaining the effect of suppressing unnecessary magnetic fields in the deflection yoke, which is an advantage of the bandless type coil, is provided. You can easily create.

The holding portion is provided in the front portion of the coil mounting frame, characterized in that it consists of a flexible tongue piece for receiving a band of the deflection coil to give a pressing force toward the neck side of the coil mounting frame. do.

Alternatively, the holding portion is provided in the front portion of the coil mounting frame, characterized in that it is composed of a narrowing portion for positioning by inserting the band of the deflection coil.

According to this holding part, the deflection coil can be easily and reliably attached to the coil mounting frame.

Embodiments of the invention will be described with reference to the drawings.

1 is a perspective view illustrating a deflection yoke device of an embodiment of the present invention.

1, the bandless type horizontal deflection coil 10 is shown as a deflection coil. FIG. 1A is a perspective view showing the appearance of the horizontal deflection coil 10, and FIG. 1B is a side view of the coil portion generating the horizontal deflection magnetic field in FIG. (C) is a front view seen from the front side (large diameter part) in FIG. 1 (a), and FIG. 1 (d) shows the side view seen from the coil window part side in FIG. 1 (a), respectively.

The bandless type horizontal deflection coil 10 shown in Fig. 1A has portions 11 and 11 which give a horizontal deflection magnetic field as a function of deflection yoke to the electron beam, and an overhead which does not contribute to the deflection of the electron beam. It consists of connecting wires 12 and 13. The neck-side overhead connection wire 12 is a bandless type in which no band portion is formed, and most of the front-side overhead connection wire 13 is bandless, but there is a possibility of generating unnecessary magnetic field on the front side. There is no small band 14 enough. Reference numeral 15 is a window portion of the wound coil.

In the configuration shown in Fig. 1, the bandless type coil has a basic shape, but by providing a small band 14 on the front side overhead connection wire 13, it contributes to the deflection of the electron beam, which is an advantage of the bandless type deflection coil. The generation of a magnetic field which is not performed can be suppressed (see magnetic fields 121 and 131 of FIG. 1B), and the front-side small band 14 allows the deflection coil 10 to be a coil separator as a coil mounting frame ( It is possible to easily create a structure to hold (not shown). That is, the horizontal deflection coil 10 can be easily fixed in the tube axis direction with respect to the inner surface of the coil separator using the small band 14.

In addition, the small band 14 formed on the front side is very small, has only the minimum width necessary for coupling with the coil separator (about 1/4 of the conventional surface area), and contributes to the deflection of the electron beam. Unnecessary generation of magnetic fields can be prevented. As a result, the holding structure of the coil can be made, and the extra power required to cancel the generation of unnecessary magnetic fields can be reduced.

Here, a schematic configuration of the deflection yoke device will be described with reference to FIG. 2.

2 shows an exploded perspective view of the deflection yoke device.

In Fig. 2, the deflection yoke device includes a pair of coil separators 20 and 20 'of a two-divided structure (1/2 body structure) formed of synthetic resin such as polypropylene, and the pair of coil separators ( A pair of saddle-shaped horizontal deflection coils 10, 10 'mounted inside the 20, 20' and a pair of trolley-type verticals arranged outside the pair of coil separators 20, 20 '. Deflection coils 30 and 30 ', the horizontal deflection coils 10 and 10' are mounted inside the separator with respect to the pair of coil separators 20 and 20 ', and the vertical deflection coils 30 and 30' are mounted. 30 ') outside the separator, and a pair of mounting brackets 41 and 41' are used to integrate the neck portions of the coil separators 20 and 20 ', thereby completing the completed deflection yoke device. Fastening van after inserting from the large diameter side to the cone side from the neck side of CRT which is not shown in figure. The deflection yoke device is attached to the CRT neck portion by fastening the cylindrical tongue pieces 22, 22 'on the neck side of the coil separators 20, 20' using a rod 42: clamp band.

In the assembled deflection yoke device, the coil separators 20 and 20 'have a shape which is sequentially enlarged from the small diameter portion on the neck side to the large diameter portion on the front side, and are arranged in and out of the coil separators 20 and 20'. Similarly, the horizontal deflection coils 10 and 10 'and the vertical deflection coils 30 and 30' are arranged in such a manner as to sequentially expand from the small diameter portion to the large diameter portion.

The neck portions of the coil separators 20 and 20 'are provided with box portions 21 and 21' respectively used for wiring windings, and the horizontal deflection coils 10 and 10 'are respectively provided on the front sides of the coil separators 20 and 20'. Box portions 23 and 23 'used for holding and positioning a portion of the front side (small bands 14 and 14') of the front side) are provided. In addition, a plurality of tongue pieces 22, 22 'which are connected to the box portions 21 and 21' on the neck side and formed in a cylindrical shape are provided, and the deflection yoke device is fixed to a CRT (not shown). These tongue pieces 22 and 22 'are brought into contact with the outer periphery of the neck portion of the CRT to be fastened and fastened by the fastening band 42. The inner surface of the large diameter portion of the deflection yoke device is fixed to the outer surface of the CRT without interposing the cone portion of the CRT. Reference numeral 31 and 31 'denote cores, such as ferrite, on which the vertical deflection coils 30, 30' are wound.

Next, the positioning method at the time of mounting the horizontal deflection coil 10 of FIG. 1 to the coil separator which is a coil mounting frame is demonstrated with reference to FIG. 3 and FIG. About the coil separator, only the 1/2 coil coil separator 20 is shown.

The bandless type horizontal deflection coil 10 has a small band 14 formed on its front side overhead connection wire, while the horizontal deflection coil 10 is formed on the box portion 23 of the front portion of the coil separator 20. The structure which holds the small band 14 installed in ()) is provided.

3 shows one embodiment of a holding structure for holding the small band 14. FIG. 3A shows the coil separator 20 arranged in a pair of horizontal deflection coils 10 and 10 'on the left and right of the center rib 24 provided on the inner surface thereof. The side view (however, the cross section is shown about the vertical deflection coils 30 and 30 ') in which the pair of vertical deflection coils 30 and 30' were arrange | positioned outside the separator 20 is shown. FIG. 3B is an enlarged perspective view of the structure of the front side box portion 23 of the coil separator 20, and FIG. 3C is inside the box portion 23 of FIG. 3B. It is a side view which expands and shows the state which arrange | positioned the said small band | band 14 of the front side of the horizontal deflection coil 10. As shown in FIG.

In embodiment of FIG. 3, as shown in FIG.3 (b), the elastic tongue piece 26 is provided in the box part 23 of the front part of the coil separator 20. As shown in FIG. That is, the front side box part 23 is comprised in a U shape at the cross section, and the at least 1 tongue piece 26 which provided elasticity in the front-end | tip part of the c-shaped opening side is provided. The coil separator 20 is disposed with respect to the horizontal deflection coils 10 and 10 'by placing the small band portions 14 and 14' provided in the horizontal deflection coils 10 and 10 'in contact with the tongue piece 26. Is applied to the closed opening (neck side small diameter portion) direction [f: see FIG. 3 (c)] of the horizontal deflection coils 10, 10 'to be the middle portion of the coil separator 20. The positioning is performed by pressing on a curved surface or by pressing on a surface serving as a reference on the neck side of the coil separator 20 (for example, the inner surface 25 of the box portion 21).

In this way, the small bands 14, 14 'are accommodated by the front tongue tongue 26 of the coil separator 20, so that the deflection coils 10, 10' can be easily and reliably attached to the coil separator. Can be.

4 shows another embodiment of a holding structure for holding the small band 14. FIG. 4A shows a pair of horizontal deflection coils 10 and 10 'arranged on the left and right sides of the center rib 24 provided on the inner surface of the coil separator 20, and the coil separator 20 is also provided. The side view (however, the vertical deflection coils 30 and 30 'show a cross section) in a state where the pair of vertical deflection coils 30 and 30' are arranged outside of the X. FIG. 4B is an enlarged side view illustrating a state in which the front side small band 14 of the deflection coil 10 is arranged in an inside of the front side box portion 23 of the coil separator 20.

In the embodiment in Fig. 4, the projections 27 are provided so that the small bands l4 and 14 'provided in the deflection coils 10 and 10' can be fitted to the box portion 23 of the front portion of the coil separator 20. Install it. That is, in the box part 23 whose cross section of the front side is C shape, the processus | protrusion 27 is provided in the C-shaped back side inner surface 23a, and the protrusion 27 and the C-shaped open side inner surface 23b are provided. ) Is to install a narrowing portion to fit the small band (14, 14 '). Thereby, the said small band 14,14 'can be pinched in the front end inner surface 23b of the projection part 27 and the box part 23, and positioning can be performed.

In this manner, the small-sized bands 14 and 14 'are fitted into the front side narrowing portion of the coil separator 20 so that the deflection coils 10 and 10' can be easily and reliably attached to the coil separator.

When the coil separator adopting the holding structure of any one of Figs. 3 and 4 is combined with the coil shape proposed in the embodiment of the present invention, it is possible to realize a bandless type coil which is easy to maintain and reliable. In other words, a bandless coil capable of making the holding structure easy without reducing the suppression effect of the magnetic field that does not contribute to electron beam deflection becomes possible.

The coil fixing method for the coil separator described in the above embodiment was the fixing method in the tube axis direction, but the fixing method in a direction other than the tube axis direction is as shown in FIG. 5, for example.

It is a figure for demonstrating the fixing method of directions other than the tube axis direction at the time of attaching a deflection coil to a coil separator. (A) is a perspective view which shows the internal structure of the coil separator 20 which comprises a 1/2 body, FIG. 5 (b) is a side view seen from the inner surface side in FIG. 5 (c) is a front view seen from the front (large diameter part) side in FIG. 5 (a).

In order to fix the deflection coil (not shown) in a direction other than the tube axis direction (in particular, the direction in which the center rib 24 is provided on the inner surface of the coil separator 20), the coil shape of the conventional example described above is also included. It is common to all coil shapes. As shown in Fig. 5, the structure is provided with a plurality of projections 28 (four in Fig. 5) in the curved portion of the middle portion of the coil separator 20, or in the box portion 23 on the front side. A plurality of elastic ribs 29 (two in FIG. 5) are provided, and the structure which presses the horizontal deflection coils (for example, 10, 10 ') by the center rib 24 in the coil separator 20 is employ | adopted.

In addition, in the above embodiment, the saddle-type horizontal deflection coil has been described, but the present invention is not limited to this, but can also be applied to a vertical deflection coil having a saddle shape.

As described above, according to the present invention, although the bandless type deflection coil is made, the holding structure to the coil mounting frame can be easily made, and both the suppression of the magnetic field not contributing to the deflection of the electron beam and the ease of the holding structure are achieved. The deflection yoke device can be realized.

Claims (4)

A deflection yoke device mounted on the outer circumference of the cathode ray tube and generating a magnetic field for deflecting the trajectory of the electron beam, comprising: a pair of split coil mounting frames having a shape extending from the neck side to the front side of the cathode ray tube; And a pair of split horizontal deflection coils mounted on the inner circumference of the coil mounting frame and extending from the neck side of the cathode ray tube toward the front side and generating a magnetic field for deflecting the electron beam in the horizontal direction, and the outer circumference of the coil mounting frame. A deflection yoke device comprising: a pair of divided vertical deflection coils mounted on the and extending from the neck side of the cathode ray tube toward the front side and generating a magnetic field for deflecting the electron beam in a vertical direction. Each of the divided horizontal deflection coils has a horizontal deflection magnetic field generating portion, a neck-portion overhead connecting wire and a front-portion overhead connecting wire, The neck side overhead connection wire forms a bend-less structure along the neck circumference of the cathode ray tube, The front side overhead connection wire forms a complex form of the bandless structure portion along the front side outer periphery of the cathode ray tube and the band structure portion perpendicular to the tube axis of the cathode ray tube, The coil mounting frame has a holding part on the front side, And the band structure portion of the front side overhead connection portion of the horizontal deflection coil is held on the outer circumference of the coil mounting frame, so that the horizontal deflection coil is supported on the inner circumference of the coil mounting frame. delete The coil holding frame according to claim 1, wherein the retaining portion has an elastic tongue, and the band structure portion of the front side overhead connection portion of the horizontal deflection coil is formed by the tongue of the retaining portion. A deflection yoke device, characterized in that it is supported on the inner circumference of the coil mounting frame by applying an elastic pressing force in the neck side direction. The horizontal deflection coil according to claim 1, wherein the retaining portion has a constriction portion, and the band structure portion of the front side overhead connection portion of the horizontal deflection coil is constricted to the constriction portion of the retaining portion, so that the horizontal deflection coil is formed in the coil. Deflection yoke device, characterized in that supported on the inner circumference of the mounting frame.