JP2003077406A - Deflecting yoke device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflecting yoke device which can easily make an alignment adjustment by way of positioning in the go-around direction of a ferrite core and can fix the ferrite core in free removal without relying on an adhesive. SOLUTION: With the deflecting yoke device in which a nearly conical cylinder-shaped separator 1 is fitted with nearly a conical cylinder-shaped ferrite core fit for the contour of the separator, a plurality of recesses 4 are arranged in a given pitch at an end edge part of the ferrite core, and at same time, a protrusion 5 fitting to the recesses 4 is provided at a corresponding position of a separator 1 to make it a positioning means. A dent part 7 is formed at an outer periphery of the ferrite core on a wide-open side, and a stopping piece 8 with a protrusion is mechanically fixed with a screw 9 or the like at a corresponding position of a flange part 6 of the separator 1, while, the ferrite core 2 is fixed by coordinating the protrusion of the stopping piece 8 with the dent part 7. Alignment is adjusted by shifting a recess 4 insertion-coupling with the protrusion 5 one by one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke device that bends the trajectory of an electron beam by electromagnetic deflection, and more specifically, a ferrite core forming the magnetic core of a deflection coil is supported by a support base thereof. The present invention relates to the improvement of the assembly structure to a certain separator.

[0002]

BACKGROUND OF THE INVENTION A deflection yoke device, as shown in FIG.
A cathode-ray tube has a substantially conical tubular separator 1 which is surrounded by a neck portion, and a substantially conical tubular ferrite core 2 which fits the outer shape of the separator and a deflection coil for horizontal and vertical deflection. In addition, in FIG.
Although illustration of the deflection coil is omitted, the deflection yoke device includes a saddle-saddle type in which both the horizontal deflection coil and the vertical deflection coil are attached to the ferrite core 2 from the outside.
Two types, a saddle-toroidal type in which one of the horizontal deflection coil and the vertical deflection coil is wound around the ferrite core 2, are well known.

In the deflection yoke device, it is necessary to perform alignment adjustment for horizontal and vertical deflection with respect to the cathode ray tube. For this purpose, the ferrite core 2 temporarily attached to the separator 1 is rotated in the circumferential direction to perform image adjustment. The ferrite core 2 is fixed by the adhesive 3 at the position where the matching image is obtained.

However, in such alignment adjustment, the positional relationship between the two must be maintained until the adhesive 3 is cured, and if the holding is insufficient, it may deviate from the position that should have been adjusted. . Therefore, it requires great care and is time-consuming. further,
Workability is poor because the next process work cannot be performed until the curing of the adhesive 3 is completed.

On the other hand, as the cathode ray tube becomes wider and thinner, the deflection yoke device is required to deflect at a large angle. Therefore, since a larger exciting current is passed for deflection control, the amount of heat generated in the deflection coil tends to increase. For this reason, the adhesive 3 to which the ferrite core 2 is fixed is softened, and there is a concern that the position may be displaced.

[0006] In recent years, it has been required from the viewpoint of resource recycling and the like that separation is easy at the time of disposal. Therefore, for example, the adhesive 3 or the like becomes a source of harmful substances at the time of incineration, so that it is preferable to keep the amount used to the minimum necessary amount, and it is best if the constitution which is not necessary can be adopted. Further, as a matter of course, since the separator 1 and the ferrite core 2 are made of different materials, it is necessary to separate them at the time of disposal, but if they are integrated with the adhesive 3, there is a problem that they are difficult to separate.

The present invention has been made in view of the above background, and an object of the present invention is to solve the above problems and to easily perform alignment adjustment for aligning the ferrite core in the circumferential direction. It is an object of the present invention to provide a deflection yoke device capable of removing the ferrite core without using an adhesive agent.

[0008]

In order to achieve the above object, a deflection yoke device according to the present invention is mounted on a neck portion of a cathode ray tube to bend an electron beam trajectory by a magnetic field. In a deflection yoke device in which a substantially conical-cylindrical separator that covers the neck portion is fitted with a substantially conical-cylindrical ferrite core and a deflection coil for horizontal and vertical deflection, the ferrite core is attached to the separator. The fixing means is fixed by a mechanical structure, and the positioning means is configured to prevent rotation of the ferrite core in the circumferential direction so as to be rotatable.

The positioning means may have a structure in which a plurality of concave portions are provided at a predetermined pitch on the edge portion of the ferrite core, and convex portions which fit into the concave portions are provided at corresponding positions of the separator, or The ferrite core is provided with a convex portion at an edge portion thereof, and a plurality of concave portions which are fitted into the convex portion are arranged side by side at corresponding positions of the separator.

Further, the fixing means has a recess formed on the outer periphery of the ferrite core on the wide open end side, and a stopper having a protrusion is mechanically fixed to a corresponding position of the flange of the separator by a screw or the like. When fixing, the ferrite core may be fixed by linking the protrusion of the stopper piece to the recess, or a threaded portion may be provided on the outer periphery of the separator on the side of the narrow opening, and the threaded portion In addition, a pressing plate provided with a corresponding thread portion on the inner circumference of the opening is screwed together, and the pressing plate is provided with a plurality of pressing springs in pairs facing the narrow open end of the ferrite core. As the plate is screwed together, the narrow open end is pressed and fixed by the pressing spring.

Therefore, according to the present invention, since the positioning means for rotatably stopping the position of the ferrite core in the orbiting direction is provided, the positioning can be performed while the rotation is stopped. That is, since the ferrite core and the separator are provided with recesses and protrusions and fitted together, rotation can be prevented, and alignment adjustment can be performed by changing the fitting relationship between the recesses and protrusions.

Further, since the fixing means for fixing the ferrite core to the separator by a mechanical structure is provided, the ferrite core can be easily removed. That is, since the ferrite core is fixed by mechanically linking it with a stopper piece or fixed by pressing it with a holding spring of a holding plate, it can be easily removed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 2 and 3 show a first embodiment of the present invention. The deflection yoke device according to the present embodiment is similar to the conventional device described above in that a substantially conical cylindrical separator 1 that covers the neck portion of the cathode ray tube and a substantially conical cylindrical ferrite core 2 that fits the outer shape of the separator. In addition, a deflection coil is attached for horizontal and vertical deflection. The deflection coil is not shown in FIG.

In this deflection yoke device, fixing means for fixing the ferrite core 2 to the synthetic resin separator 1 by a mechanical structure, and the position of the ferrite core 2 in the circumferential direction are rotatably fixed. Positioning means.

As the positioning means, the ferrite core 2
A plurality of concave portions 4 ... Are provided at a predetermined pitch at the end edge portion of, and a convex portion 5 that fits into the concave portions 4 ... In this case, the concave portions 4 are formed side by side in the outer peripheral portion of the ferrite core 2 on the wide open end side in the circumferential direction of the axis, and the convex portions 5 are oriented in the orientation corresponding to the flange portion 6 of the separator 1 on the wide open end side. Take the configuration to be attached with. The arrangement pitch of the recesses 4 can be set appropriately, and for example, it may be set to about 1 degree when viewed from the radial angle from the axial center of the separator 1.

The pair of the concave portions 4 ... And the convex portions 5 may be formed on the narrow open end side of the separator 1. Also,
As the positioning means, the concave portions 4 ... And the convex portions 5 may be arranged in reverse. In other words, a configuration may be employed in which the edge portion of the ferrite core 2 is provided with a convex portion, and a plurality of concave portions that fit with the convex portion are arranged side by side at corresponding positions of the separator 1.

As a fixing means, a recessed portion 7 is formed on the outer periphery of the ferrite core 2 on the wide open end side, and a stopper piece 8 having a projection is provided at a corresponding position of the flange portion 6 of the separator 1 as shown in FIG. It is configured such that it is mechanically fixed by screws 9 or the like. At the time of the fixing, the ferrite core 2 is fixed by linking the projection of the stopper piece 8 with the recess 7. Then, a pair of the recessed portion 7 and the stopper piece 8 is also provided at a position on the opposite side opposite to the axial center of the separator 1.

The arrangement of the recessed portion 7 and the stopper piece 8 as the fixing means is not limited to the structure provided at two opposing positions, and for example, the peripheral portion of the flange portion 6 is divided into three parts. You may adopt the composition provided in each place,
One set is enough.

Further, in the illustrated example, the stopper piece 8 is separately formed and fixed to the flange portion 6 of the separator 1 with the screw 9, but the stopper piece 8 may be integrally formed with the separator 1. That is, since the separator 1 is made of synthetic resin, it can be elastically deformed to some extent, and therefore the ferrite core 2 can be fixed by utilizing the elastic deformation.

Furthermore, in this embodiment, an example in which the ferrite core 2 is provided with the recessed portion 7 is shown. However, when the ferrite core 2 can be fixed by the stopper piece 8, the recessed portion 7 is not particularly provided. Is also good.

In this embodiment, by setting the ferrite core 2 in the separator 1, any of the concave portions 4 ... Fits with the convex portion 5. Therefore, in the alignment adjustment, the convex portion 5 and the concave portion 4 which is fitted are sequentially shifted, and the fitting relationship in which the aligned image is obtained becomes the optimum position. At this time, any one of the plurality of concave portions 4 is fitted into the convex portion 5, so that it is not necessary to maintain the adjusted positional relationship as in the conventional case, and the fitting of the concave portion 4 and the convex portion 5 is made of ferrite. It will prevent the core 2 from rotating. Then, in this state, the stopper piece 8 is fixed to the flange portion 6 with the screw 9 to complete the fixing of the ferrite core 2.

Therefore, according to the present invention, by merely changing the fitting relationship between the concave portion 4 of the ferrite core 2 and the convex portion 5 of the separator 1, it is possible to perform alignment while preventing rotation. That is, alignment adjustment can be easily performed.

Then, the stopper piece 8 is screwed to the flange portion 6 with a screw 9
The fixing of the ferrite core 2 can be completed by fixing the ferrite core 2 by means of, and the fixing is mechanical fixing by the screw 9 without using an adhesive, so that the ferrite core 2 can be easily removed. Therefore, it can be easily separated at the time of disposal and is preferable for recycling.

4 and 5 show a second embodiment of the present invention. In the second embodiment, the configurations of the positioning means and the fixing means are changed. In other words, as the positioning means, the recesses 4 are provided on the wide open end side of the ferrite core 2, but are formed not on the outer peripheral portion thereof but on the surface facing the flange portion 6 of the separator 1 in the circumferential direction of the axis. Then, the convex portion 5 is attached to the facing surface of the flange portion 6 in a corresponding orientation.

On the other hand, as a fixing means, as shown in FIG. 5, a threaded portion 10 is provided on the outer periphery of the separator 1 on the side of the narrow open end, and the threaded portion 10 is provided with a threaded portion corresponding to the inner periphery of the opening hole 11. The pressing plate 13 provided with the portion 12 is screwed together. Then, the ferrite core 2 is attached to the holding plate 13.
A plurality of pressing springs 14 are provided in a pair facing the narrow open end of the pressing spring 13, and the pressing springs 14
Then, the narrow open end of the ferrite core 2 is pressed and fixed.

With this structure, the ferrite core 2 is set in the separator 1 and the pressing plate 13 is screwed into the pressing plate 13 so that the pressing spring 14 presses and holds the narrow open end of the ferrite core 2. At this time, any one of the concave portions 4 fits into the convex portion 5. Therefore, in alignment adjustment, the ferrite core 2 is pulled up against the restraining force of the restraining spring 14, and the fitting of the concave portion 4 and the convex portion 5 is first removed. And the convex portion 5
The recesses 4 for fitting with each other are sequentially shifted, and the fitting relationship for which a matching image is obtained becomes the optimum position. At this time, any one of the plurality of concave portions 4 is fitted into the convex portion 5, so that it is not necessary to maintain the adjusted positional relationship as in the conventional case, and the fitting of the concave portion 4 and the convex portion 5 is made of ferrite. It will prevent the core 2 from rotating. Further, here, since the pressing spring 14 of the pressing plate 13 exerts the pressing force, the fixing of the ferrite core 2 is completed by keeping the fitting at the optimum position.

Therefore, this embodiment is also similar to the first embodiment, and the recesses 4 of the ferrite core 2 and the projections 5 of the separator 1 can be aligned while being prevented from rotating by simply changing the fitting relationship, that is, , Alignment adjustment can be done easily.

Then, the fixing of the ferrite core 2 can be completed by screwing the pressing plate 13 into the threaded portion 10 of the separator 1, and since the fixing is mechanically fixed by the screw 9 without using an adhesive, the ferrite core 2 is fixed. Easy to remove. Therefore, it can be easily separated at the time of disposal and is preferable for recycling.

It is needless to say that the positioning means and the fixing means are not limited to those in the above embodiment. And
The combination of each means is not limited to the above embodiments. That is, the positioning means of the first embodiment and the fixing means of the second embodiment may be combined, or the fixing means of the first embodiment and the positioning means of the second embodiment may be combined. May be combined. Further, one of the means of each of the embodiments may be realized by another structure not shown.

[0030]

As described above, in the deflection yoke device according to the present invention, since the ferrite core and the separator are provided with the concave portion and the convex portion and are fitted to each other, the rotation can be prevented.
The alignment adjustment can be performed by changing the fitting relationship between the concave portion and the convex portion. Therefore, it is possible to easily perform the alignment adjustment which is the alignment of the ferrite core in the circumferential direction.

Further, since the ferrite core is fixed by mechanically linking it with a stopper piece or fixed by pressing with a holding spring of a holding plate, the ferrite core can be easily removed and fixed. Since it is mechanically fixed by screws without using an adhesive, it can be easily separated at the time of disposal and is suitable for recycling.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a conventional deflection yoke device.

FIG. 2 is a perspective view of the deflection yoke device according to the first embodiment.

FIG. 3 is a cross-sectional view illustrating a portion of a fixing unit in FIG.

FIG. 4 is a perspective view of a deflection yoke device showing a second embodiment.

5 is a cross-sectional view illustrating a portion of the fixing structure of FIG.

[Explanation of symbols]

1 separator 2 Ferrite core 3 adhesive 4 recess 5 convex 6 Flange 7 Dimples 8 stop pieces 9 screws 10 screw thread 11 Open hole 12 Compatible thread strip 13 Rest plate 14 Holding spring

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuya Ikegami             F-de, 5-36-1 Shimbashi, Minato-ku, Tokyo             K.K Co., Ltd. F term (reference) 5C042 FF02 FF05 FF06 FG09 FG14                       FG17 FH10

Claims (5)

[Claims] 1. A cathode-ray tube, which is mounted on a neck portion of a cathode ray tube to bend an orbit of an electron beam by a magnetic field, wherein a substantially conical cylinder-shaped separator surrounding the neck portion is fitted into the outer shape of the separator. In a deflection yoke device for attaching a ferrite core and a deflection coil for horizontal and vertical deflection, fixing means for fixing the ferrite core to the separator by a mechanical structure, and changing the position of the ferrite core in the circumferential direction. A deflection yoke device, comprising: a positioning means for preventing rotation. 2. The positioning means has a structure in which a plurality of concave portions are provided at a predetermined pitch on an edge portion of the ferrite core, and convex portions which fit into the concave portions are provided at corresponding positions of the separator. The deflection yoke apparatus according to claim 1, wherein the deflection yoke apparatus is a deflection yoke apparatus. 3. The positioning means has a structure in which a convex portion is provided on an edge portion of the ferrite core, and a plurality of concave portions that are fitted into the convex portion are arranged side by side at corresponding positions of the separator. The deflection yoke device according to claim 1. 4. The structure in which the fixing means forms a recess on the outer circumference of the ferrite core on the wide open end side, and a stopper having a protrusion is mechanically fixed to a corresponding position of the flange of the separator with a screw or the like. The ferrite core is fixed by linking the projection of the stopper piece with the recess when the fixing is performed.
4. The deflection yoke device according to any one of items 1 to 3. 5. A structure in which the fixing means is provided with a threaded portion on the outer periphery of the separator on the side of the narrow open end, and a retaining plate provided with a corresponding threaded portion on the inner periphery of the opening hole is screwed into the threaded portion. The restraining plate is provided with a plurality of restraining springs in a pair facing the narrow open end of the ferrite core, and the restraining spring is screwed into the restraining plate to fix and hold the narrow open end. The deflection yoke device according to any one of claims 1 to 3, characterized in that: