JP2004071541A - Deflection yoke and cathode-ray tube device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase flexibility of a wire-wound pattern as well as to make sure isolation between both of horizontal/vertical deflection coils, in one with a slot core. <P>SOLUTION: In the deflection yoke, core projections R1 to R20 ribbed along in a tube axis direction are formed in a predetermined interval in a circumferential direction in an area close to an electron gun on an inside surface of a ferrite core, and core grooves S1 to S20 are formed by respective adjacent core projections R1-R20. A horizontal deflection coil 30 and a vertical deflection coil 26 are wound in the core grooves S1 to S20. A funnel-shaped isolating frame 28 pinched by the horizontal and vertical deflection coils 30, 26 and isolates the both deflection coils 30, 26 is attached to the ferrite core. Guide grooves G1 to G26 for guiding the horizontal deflection coil 30 are formed on an inside surface on the side closer to a phosphor screen than the side of the core projections R1-R20 in a tube axis direction of the isolating frame 28. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cathode ray tube device used for a television, a computer display, and the like, and a deflection yoke used for the cathode ray tube device, and particularly to a structure of the deflection yoke.
[0002]
[Prior art]
One type of deflection yoke includes a so-called slot core. The slot core is formed by forming a plurality of grooves from a small diameter side to a large diameter side in a circumferential direction on an inner surface of a ferrite core having a trapezoid shape. A vertical deflection coil and a horizontal deflection coil are wound around the ferrite core while being guided by the grooves.
[0003]
The deflection yoke having such a configuration has the following advantages over a deflection yoke formed of a ferrite core having a simple trumpet shape and having a smooth inner surface.
Since the ferrite core can be closer to the cathode ray tube, the deflection sensitivity is improved. Further, since the magnetic flux is less likely to be linked to the deflection coil, eddy current loss is reduced, and heat generation of the deflection yoke is suppressed.
[0004]
[Patent Document 1]
JP-A-11-7891
[Patent Document 2]
Japanese Utility Model Publication No. 7-35289
[Problems to be solved by the invention]
By the way, one of the problems in the deflection yoke employing the slot core is how to insulate the vertical deflection coil and the horizontal deflection coil while maintaining the productivity of the deflection yoke. In other words, in the case of the above ferrite core having a simple trumpet shape, simply sandwiching an insulating frame also having a simple trumpet shape between the vertical deflection coil and the horizontal deflection coil disposed on the inner side thereof, the two coils Can be insulated. However, in the case of a slot core, a vertical deflection coil and a horizontal deflection coil are provided in each groove, so that it is not easy.
[0007]
As a solution to the above problem, there is a deflection yoke disclosed in Patent Document 1, for example. In this deflection yoke, the whole of the trumpet-shaped insulating frame is formed to have irregularities according to the groove shape of the slot core. Then, after the vertical deflection coil is directly wound around the groove of the slot core, the insulating frame is fitted to the groove of the slot core. Next, a horizontal deflection coil is wound around a groove on the inner surface side of the insulating frame. According to this, both the deflection coils can be insulated by a very simple operation of fitting the insulating frame formed in accordance with the groove of the slot core into the slot core after winding the vertical coil, thereby impairing productivity. Nothing.
[0008]
Another problem in the deflection yoke employing the slot core is how to obtain a desired deflection magnetic field distribution. This is due to the following circumstances. That is, as described above, in the slot core, since the deflection coil is wound along the groove, the winding pattern of the deflection coil that determines the deflection magnetic field distribution is restricted by the groove shape (groove pattern). You. On the other hand, the slot core (ferrite core) has a low degree of freedom in a groove pattern that can be formed, for reasons of manufacturing. In the deflection yoke disclosed in Patent Document 1, not only the vertical deflection coil wound directly around the slot core, but also the horizontal deflection coil, the winding pattern is constrained by the groove pattern of the slot core. In short, the degree of freedom is low.
[0009]
For example, there is a deflection yoke disclosed in Patent Document 2 as a solution to the above another problem. The trumpet-shaped ferrite core used for this deflection yoke has a groove formed only in the small-diameter half, and the inner surface of the large-diameter half is a smooth surface without irregularities. The purpose is to secure the degree of freedom of the winding pattern. However, Patent Literature 2 does not disclose any specific means for guiding the deflection coils, nor any means for insulating both deflection coils.
[0010]
The present invention has been made in view of the above-described problems, and provides a deflection yoke in which insulation between a horizontal deflection coil and a vertical deflection coil is ensured and a degree of freedom of a winding pattern is increased, and a cathode ray tube device using the deflection yoke. The purpose is to provide.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a deflection yoke according to the present invention is a deflection yoke arranged on the outer periphery of a cathode ray tube, is made of a funnel-shaped magnetic material, and has a large diameter from the small diameter side end on the inner peripheral surface. A plurality of ridge-shaped protrusions are formed at predetermined intervals in the circumferential direction until reaching the side end, and a core groove is formed by an adjacent protrusion, and the remaining portion near the large diameter side end is formed. A core whose periphery is finished to a smooth surface, a first deflection coil partially guided by the core groove and wound around the core, and disposed inside the first deflection coil; A second deflection coil, a frame sandwiched between the first deflection coil and the second deflection coil, and a portion corresponding to the smooth surface of the core and / or the large-diameter end portion A guide groove along the tube axis direction is provided at a portion of the cathode ray tube protruding in the tube axis direction from the front. And a circumferentially formed by plural rows formed insulating frame, said second deflection coil, characterized in that a portion of which is wound by being guided by the guide groove.
[0012]
Further, the guide groove is formed at an interval different from the core groove in the circumferential direction.
Further, a part of the second deflection coil is disposed in the core groove, and the insulating frame extends from the part corresponding to the smooth surface for each core groove, and has a strip shape. It is characterized by having a strip-shaped portion.
[0013]
Further, the insulating frame has a ring portion connecting each end of the band-shaped portion.
Further, a part of the second deflection coil is disposed in the core groove, and the insulating frame extends from the part corresponding to the smooth surface for each of the core grooves, Is characterized in that it has a band-shaped portion formed in a cross section adapted to the cross section shape of the above.
[0014]
Further, the insulating frame is characterized in that a portion of the core corresponding to the region where the core groove exists has a pleated cylindrical portion adapted to the unevenness of the region.
The second deflection coil is partially wound around the core groove, and the guide groove is provided at a predetermined distance from the core groove in the tube axis direction. It is characterized by having.
[0015]
In order to achieve the above object, a cathode ray tube device according to the present invention includes a cathode ray tube and the above-described deflection yoke arranged on an outer periphery of the cathode ray tube.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a schematic side view of a color cathode ray tube device 10 according to an embodiment. The color cathode ray tube device 10 includes an envelope 16 in which a front flat panel 12 in which a phosphor screen is formed and a funnel 14 are joined, an electron gun 18 installed in a neck portion of the funnel 14, and a funnel 14 , A deflection yoke 20 and a convergence yoke 22 arranged on the outer periphery. FIG. 1 shows only the positional relationship among the above members, and the members including the deflection yoke 20 are shown in a very simplified manner.
[0017]
FIG. 2 is a front view of the deflection yoke 20 as viewed from the phosphor screen side. In this specification, X indicates a horizontal axis, and Y indicates a vertical axis. At the origin (point 0) where the two axes intersect, the axis that intersects the two axes at right angles is the Z axis (tube axis).
FIG. 3 shows an AA cross section in FIG. FIG. 4 also shows a BB cross section.
[0018]
As shown in FIGS. 2 to 4, the deflection yoke 20 has a funnel-shaped core 24 made of a magnetic material. Inside the core 24, a vertical deflection coil 26, an insulating frame 28, and a horizontal deflection coil 30 are provided. Are arranged in this order. In this embodiment, ferrite is used as the magnetic material. Hereinafter, the core 24 is referred to as a ferrite core 24.
[0019]
As shown in FIG. 1, the ferrite core 24 has a trumpet shape in which the diameter at the end of the phosphor screen (front flat panel 12) is larger than the diameter at the end of the electron gun 18. I have. That is, the ferrite core 24 has a substantially cylindrical shape whose diameter increases from the electron gun 18 toward the phosphor screen.
FIG. 5 is a front view of the ferrite core 24 around which the vertical deflection coil 26 is wound.
[0020]
On the inner surface of the ferrite core 24, ridge-shaped protrusions (hereinafter, referred to as “core protrusions”) R projecting toward the Z-axis along the Z-axis (tube axis) direction are equally spaced in the circumferential direction. Are formed. In the present example, twenty are formed at intervals of 18 °. As shown in FIG. 4 and FIG. 5, the core convex portion R is formed from the small diameter side end (electron gun side end) to the large diameter side end (phosphor screen side end) almost in the middle. . As shown in FIG. 5, when the ferrite core 24 is viewed from the front (from the phosphor screen side), it can be seen that the core protrusions R are provided radially. Here, among the core protrusions R on the X-axis, the core protrusion on the right side as viewed in FIG. 5 is designated as R1, and a serial number is given in a counterclockwise direction from R1. To R20.
[0021]
As a result of the formation of the core protrusions R as described above, a groove (hereinafter, referred to as a “core groove”) S is formed by the adjacent core protrusions R. Here, a core groove formed by the core convex portion R1 and the core convex portion R2 is defined as S1, and a serial number is added counterclockwise from S1 to distinguish each of the core grooves S1 to S20.
Further, the remaining portion of the inner surface of the ferrite core 24 where the core convex portion R is not formed (the core groove S is not formed) in the Z-axis (tube axis) direction is finished to a smooth surface without irregularities. I have.
[0022]
Hereinafter, on the inner surface of the ferrite core 24, a region where the core groove S is formed is referred to as a core groove portion, and a region finished to the smooth surface is referred to as a flat portion.
Further, a protrusion P is provided at a position corresponding to an extension of each of the core protrusions R1 to R20 on the outer periphery near the large-diameter end of the ferrite core 24. The protrusion P is formed by bonding a pin made of a synthetic resin to the outer periphery of the ferrite core 24. Here, the respective projections P are also given the same serial numbers as the core projections R to be distinguished.
[0023]
A saddle type vertical deflection coil 26 is directly wound around the ferrite core 24 having the above configuration.
The vertical deflection coil 26 is wound around the core grooves so as to be disposed in the core grooves S2 to S9 and S12 to S19 except for the core grooves S1, S10, S11, and S20. Thus, the vertical deflection coil 26 is wound at the winding angle defined by the core grooves S2 to S9 and S12 to S19 in the core groove.
[0024]
The vertical deflection coil 26 is wound around the projections P on the outer periphery near the large-diameter end of the ferrite core 24. That is, a desired winding distribution is realized in the flat portion by being wound at the winding angle defined by the protrusion P. In addition, the installation position of the protrusion P is not limited to the above-described one, and may be installed at an arbitrary position regardless of the position of the core protrusion. As a result, a winding distribution that is not so much restricted by the position of the core groove is realized in the flat portion.
[0025]
FIG. 6 is a partially cutaway front view of the insulating frame 28, and FIG. 7 is a plan view of the insulating frame 28.
The insulating frame 28 has a synthetic resin body 29 having a cone shape along the outer shape of the funnel 14, and electrically insulates the vertical deflection coil 26 from the horizontal deflection coil 30.
[0026]
The main body 29 includes an insulating frame cone portion 32 extending toward the phosphor screen and an insulating frame neck portion 34 extending toward the electron gun.
On the inner surface of the insulating frame cone portion 32, ridge-shaped projections (hereinafter, referred to as “guide projections”) Q projecting toward the Z-axis along the Z-axis (tube axis) direction are provided at predetermined intervals in the circumferential direction. It is provided in. The projection Q is formed by bonding a bent synthetic resin bar material to the inner surface of the main body 29. As shown in FIGS. 6 and 7, the protrusion Q is provided near the large-diameter end of the main body 29 (the end of the phosphor screen). As shown in FIG. 6, when the insulating frame 28 is viewed from the front (from the phosphor screen side), it can be seen that the projections Q are provided radially. Here, among the guide protrusions Q on the X axis, the guide protrusion on the right side as viewed in the plane of FIG. 6 is designated as Q1, and a serial number is assigned counterclockwise from Q1 to designate each of the guide protrusions Q1 to Q26. It will be distinguished. The phosphor screen side end of each of the guide projections Q1 to Q26 is separated from the inner surface of the main body 29 (insulating frame cone portion 32), and a gap is formed between the inner surface and the inner surface. As described later, the horizontal deflection coil 30 is hooked and wound around a portion of the guide projection Q corresponding to the gap.
[0027]
Further, as a result of the formation of the guide protrusions Q as described above, a groove (hereinafter, referred to as a “guide groove”) G is formed by the adjacent guide protrusions Q. The region where the guide groove G is formed is a flat portion of the ferrite core 24 and / or a portion closer to the phosphor screen side. That is, as shown in FIG. 4, the insulating frame 28 has a portion protruding from the ferrite core 24 toward the phosphor screen in the tube axis (Z-axis) direction. Instead of being formed from the portion corresponding to the flat portion of the ferrite core 24 to the protruding portion, the ferrite core 24 may be formed only on the portion corresponding to the flat portion, or may be formed only on the protruding portion. It doesn't matter. Here, the guide groove formed by the guide protrusion Q1 and the guide protrusion Q2 is defined as G1, and the guide grooves G1 to G26 are distinguished from each other by adding a serial number counterclockwise from G1.
[0028]
In the insulating frame neck portion 34, a plurality of slits having a predetermined width and a predetermined length are formed along the Z axis (tube axis) direction. The predetermined width is set according to the width of the core protrusion R of the ferrite core 24, and the predetermined length is set according to the length of the core protrusion R. As a result of the opening of the slits, a plurality of belt-like members extending from the insulating frame cone 32 are formed. As a result of the formation of the belt-shaped member as described above, the insulating frame neck 34 looks comb-shaped as shown in FIG. Here, the reference numeral "L" is assigned to the slit and the reference numeral "T" is assigned to the band-shaped member, and further, as shown in FIG. I decided to.
[0029]
The insulating frame 28 having the above configuration is mounted on the ferrite core 24 (FIG. 5) around which the vertical deflection coil 26 is wound. The ferrite core 24 is inserted from the large diameter side of the ferrite core 24 with the end of the insulating frame 28 on the insulating frame neck 34 side as the head. At this time, the insulating frame 28 is formed so that the corresponding slits L1 to L20 fit into the core convex portions R1 to R2, in other words, the corresponding band-shaped members T1 to T20 enter the core grooves S1 to S20. The ferrite core 24 and the ferrite core 24 are relatively slid in the Z-axis (tube axis) direction and mounted.
[0030]
After the mounting, the free ends (electron gun side ends) of the belt-shaped members T1 to T20 of the insulating frame 28 are connected, and the vertical deflection coil 26 and the horizontal deflection coil 30 are insulated near the connection position. A donut shaped ring member 36 is attached. The connection is adapted to place an arch over the free end. In addition to the above, the ring-shaped member 36 serves to secure mechanical strength at the tip of each of the band-shaped members T1 to T20 and to play a role in dimensional stability. The ring-shaped member may be joined to the band-shaped members T1 and T2 by bonding, or one of the two members may be provided with a convex portion and the other with a concave portion, and the convex portion and the concave portion may be fitted.
[0031]
After the ring member 36 is mounted, a saddle-type horizontal deflection coil 30 is wound around the insulating frame 28 as shown in FIG.
Note that the guide projection Q may be provided only in the region where the horizontal deflection coil 30 is wound. 2 and 6 show examples in which the guide projection Q is not provided near the Y axis. Instead of providing the guide projection Q, a guide groove may be dug in the main body 29 of the insulating frame 28.
[0032]
FIG. 8 is a diagram in which the deflection yoke 20 is cut along a plane perpendicular to the Z axis (tube axis) in a state after the horizontal deflection coil 30 is wound. The cutting position in the Z-axis direction is a position where the core groove of the ferrite core 24 exists. In FIG. 8, the cross section of each deflection coil is indicated by hatching for simplification. As shown in FIG. 8, in the core groove, the vertical deflection coil 26 and the horizontal deflection coil 30 are wound around the core grooves S1 to S20. Further, the two deflection coils are reliably insulated by the belt-shaped member T.
[0033]
On the other hand, in the flat portion of the ferrite core 24, as described above, the vertical deflection coil 26 is hooked and wound on the projection P which can be installed independently of the core groove, so that the vertical deflection coil 26 is not much restrained by the pattern of the core groove portion. A free winding distribution that is not performed can be realized. In the flat portion of the ferrite core 24, the horizontal deflection coil 30
Since it is guided and wound by the guide groove G which can be formed independently of the core groove, a free winding distribution which is not so much restricted by the pattern of the core groove can be realized.
[0034]
In the present embodiment, by forming the guide grooves G at intervals different from the core grooves S, a free winding distribution that is not so much restricted by the core grooves S is realized in the flat portion.
In the present embodiment, the core groove S and the guide groove G are formed at a predetermined interval in the Z-axis (tube axis). Hereinafter, the area with the interval indicated by reference numeral 38 in FIG. 2 is referred to as a “divided area”. Since FIG. 2 is complicated, it is complicated to show the divided area in a diagram, and an area corresponding to the divided area 38 in FIG. 6 is an area surrounded by two large and small circles drawn by broken lines. . By doing so, even if the core groove S and the guide groove G are formed at the same interval in the circumferential direction, it is possible to change the winding direction of the horizontal deflection coil 30 in the division region 38. . For example, it is possible to route the horizontal deflection coil from a certain core groove S to a guide groove adjacent to the guide groove G, which is an extension of the core groove S. This also enables a winding distribution that is not restricted by the pattern of the core groove in the flat portion.
(Embodiment 2)
The second embodiment is basically the same as the first embodiment except that the structure of the insulating frame is different. Therefore, the description of the common parts will be omitted, and the description will focus on the insulating frame.
[0035]
FIG. 9 is a side view of the insulating frame 40 according to the second embodiment, and FIG. 10 is a diagram of the electron gun side end of the insulating frame 40 viewed from the electron gun side. FIG. 11 is a diagram in which the deflection yoke according to the second embodiment is cut along a plane perpendicular to the Z axis (tube axis). The cutting position in the Z-axis direction is a position where the core groove of the ferrite core 24 exists. In FIG. 9, the illustration of the guide projection Q is omitted.
[0036]
The insulating frame 40 differs from the insulating frame 28 in the cross-sectional shape at the insulating frame neck. That is, the cross-sectional shape of the belt-like portion (hereinafter, referred to as “insulating portion in the core groove”) that insulates between the vertical deflection coil and the horizontal deflection coil in the core groove is different.
As shown in FIG. 11, the in-core-groove insulating portion 42 has a pair of ribs 44 on both sides and has a U-shape. Thereby, the insulating portion 42 in the core groove enhances the mechanical strength and enhances the insulation between the vertical deflection coil 26 and the horizontal deflection coil 30.
[0037]
The provision of the ring member 46 is the same as that of the first embodiment.
(Embodiment 3)
Embodiment 3 is basically the same as Embodiments 1 and 2 except that the structure of the insulating frame is different from Embodiments 1 and 2. Therefore, the description of the common parts will be omitted, and the description will focus on the insulating frame.
[0038]
FIG. 12 is a side view of the insulating frame 50 according to the third embodiment. FIG. 13 is a view of the deflection yoke according to the third embodiment cut along a plane perpendicular to the Z axis (tube axis). The cutting position in the Z-axis direction is a position where the core groove of the ferrite core 24 exists. In FIG. 12, the illustration of the guide projection Q and the ring-shaped member is omitted.
The insulating frame 50 differs from the insulating frames 28 and 40 in the cross-sectional shape at the insulating frame neck. As shown in FIG. 13, the insulating frame 50 does not have slits like the insulating frames 28 and 40 and is formed in a shape continuous in the circumferential direction. The insulating frame neck portion 52 of the insulating frame 50 extends from the insulating frame cone portion 54, and is formed in a pleated cylindrical shape adapted to the unevenness of the core groove.
[0039]
Hereinafter, this will be described in more detail.
The insulating frame 50 has a structure in which concave portions 56 (projecting toward the inside) and insulating portions 58 (projecting toward the outside) are alternately arranged in a circle. The concave portion 56 of the insulating frame 50 overlaps the core convex portion R of the ferrite core 24, and the insulating portion 58 of the insulating frame 50 overlaps the core groove S. A space for winding the vertical deflection coil 26 is provided between the core groove S of the ferrite core 24 and the insulating portion 58 of the insulating frame 50. Further, a space for winding the horizontal deflection coil 30 is secured on the inner surface side of the insulating portion 58 of the insulating frame 50.
[0040]
With such a shape, the mechanical strength of the insulating frame neck portion can be further increased, and the insulation between the two deflection coils can be further ensured.
The procedure for assembling the deflection yoke is the same as that in the first embodiment. Therefore, the procedure will be described, although it is partially repeated.
First, the vertical deflection coil 26 is wound along the core groove S of the ferrite core 24. Next, the insulating frame 50 is inserted from the side of the ferrite core 24 on the phosphor screen side (larger diameter side). As shown in FIG. 13, the width (in the circumferential direction) of the opening of the core groove S is smaller than the width of the tip of the insulating portion 58 of the insulating frame 50. Then, the positions of the core groove S and the insulating portion 58 are aligned and slid with each other in the Z-axis direction, and the corresponding insulating portion 58 of the insulating frame 50 is inserted into each core groove R. After integrating the ferrite core 24 and the insulating frame 50 in this way, a ring-shaped member (not shown) is attached, and the horizontal deflection coil 30 is wound along the groove on the inner surface of the insulating portion 58. I do.
[0041]
【The invention's effect】
As described above, according to the deflection yoke according to the present invention, the portion protruding from the portion corresponding to the smooth surface of the inner surface of the funnel-shaped core and / or the large-diameter end of the core protrudes in the tube axis direction of the cathode ray tube. Since there is an insulating frame in which a plurality of guide grooves along the pipe axis direction are formed in the circumferential direction at a portion where the second deflection coil is guided and wound in the guide grooves, the inside of the core is The degree of freedom of the winding pattern of the second deflection coil can be increased without being restrained much by the core groove formed from the small diameter end to the large diameter end of the peripheral surface.
[0042]
Further, according to the cathode ray tube device of the present invention, since the deflection yoke is arranged on the outer periphery of the cathode ray tube, the same effects as described above can be obtained.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic configuration of a cathode ray tube device.
FIG. 2 is a front view showing a schematic configuration of a deflection yoke.
FIG. 3 is a sectional view taken along line AA in FIG. 2;
FIG. 4 is a sectional view taken along line BB in FIG. 2;
FIG. 5 is a front view of a ferrite core on which a vertical deflection coil is wound.
FIG. 6 is a front view of the insulating frame.
FIG. 7 is a side view showing a part of the insulating frame.
FIG. 8 is a cross-sectional view of the deflection yoke cut along a plane perpendicular to the tube axis of the cathode ray tube.
FIG. 9 is a side view of the insulating frame of the deflection yoke according to the second embodiment.
FIG. 10 is a diagram of only the electron gun side end of the insulating frame according to the second embodiment viewed from the electron gun side.
FIG. 11 is a cross-sectional view of the deflection yoke according to the second embodiment cut along a plane perpendicular to the tube axis of the cathode ray tube.
FIG. 12 is a side view showing a part of the insulating frame of the deflection yoke according to the third embodiment.
FIG. 13 is a sectional view of the deflection yoke according to the third embodiment cut along a plane perpendicular to the tube axis of the cathode ray tube.
[Explanation of symbols]
Reference Signs List 10 color cathode ray tube device 20 deflection yoke 24 ferrite core 26 vertical deflection coils 28, 40, 50 insulating frame 30 horizontal deflection coil 36 ring-shaped member 42 insulating portion in core groove 52 insulating frame neck portions G1 to G20 guide grooves R1 to R20 core Convex portions S1 to S20 Core grooves T1 to T20 Strip member

Claims (8)

A deflection yoke arranged on the outer periphery of the cathode ray tube,
A plurality of ridge-shaped protrusions are formed at predetermined intervals in the circumferential direction from the small-diameter end to the large-diameter end on the inner peripheral surface, and are formed of a funnel-shaped magnetic material. A core having a groove formed therein, and a core whose remaining inner periphery near the large-diameter end is finished to a smooth surface,
A first deflection coil partially guided by the core groove and wound around the core;
A second deflection coil disposed inside the first deflection coil;
A frame body sandwiched between the first deflection coil and the second deflection coil, wherein a tube axis of the cathode ray tube extends from a portion corresponding to the smooth surface of the core and / or the large-diameter end portion A guide groove along the pipe axis direction in a portion protruding in the direction, and an insulating frame formed by forming a plurality of grooves in the circumferential direction;
A deflection yoke, wherein a part of the second deflection coil is wound while being guided by the guide groove. The deflection yoke according to claim 1, wherein the guide groove is formed at an interval different from the core groove in the circumferential direction. A part of the second deflection coil is disposed in the core groove,
The deflection yoke according to claim 1, wherein the insulating frame has a strip-shaped band extending from a portion corresponding to the smooth surface for each of the core grooves. The deflection yoke according to claim 3, wherein the insulating frame has a ring portion that connects each end of the band-shaped portion. A part of the second deflection coil is disposed in the core groove,
The said insulating frame has a strip | belt-shaped part extended from the part corresponding to the said smooth surface for every said core groove | channel, and formed in the cross section suitable for the cross-sectional shape of the said core groove | channel. 3. The deflection yoke according to 1 or 2. The deflection yoke according to claim 1, wherein a portion of the insulating frame corresponding to a region where the core groove of the core is present has a pleated cylindrical portion adapted to the unevenness of the region. . A part of the second deflection coil is arranged and wound in the core groove,
The deflection yoke according to claim 1, wherein the guide groove is provided at a predetermined distance from the core groove in the tube axis direction. A cathode ray tube,
A cathode ray tube device comprising: the deflection yoke according to claim 1, which is arranged on an outer periphery of the cathode ray tube.

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