JP2002175765A - Cathode-ray tube device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cathode-ray tube device including a deflection yoke of non-bend-up type whereby assembly of an insulating frame and holder can be made in a simple constitution and by simple method and also their removal can be made easily. SOLUTION: The deflection yoke of this cathode-ray tube device is composed of insulating frame 7 furnished internally with a horizontally deflecting coil, a vertically deflecting coil 8 which is installed on the outside of the frame 7 and whose farthest part from panel is shaped as tracing the funnel, and an auxiliary coil 10 installed on the holder 13, wherein the frame 7 and holder 13 are inserted one into another and engaged with each other by a resilient claw 15 provided on either of them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube used for a television set and a monitor display, and more particularly to a deflection yoke thereof.

[0002]

2. Description of the Related Art A deflection yoke attached to a cathode ray tube apparatus is mainly of a bend-up type in which an electron gun side end is bent from a surface of a funnel to a direction perpendicular to a tube axis. In recent years, in order to reduce the power consumption and cost of the tube, a bend-upless type in which the shape of the end portion on the electron gun side remains along the surface of the funnel has increased.

[0003] Generally, an auxiliary coil such as a coma aberration correction coil is attached to the deflection yoke. In the case of the bend-upless type deflection yoke as described above, an insulating coil is provided to arrange the auxiliary coil at a desired position. The frame and the holder for holding the coma aberration correction coil, the terminal plate and the like are separate parts, and these are engaged and fixed to each other. As such a technique, Japanese Patent Laid-Open No. 11-185665 discloses
When engaging and fixing a holder (described as “small cover” in JP-A-11-185665) and an insulating frame,
It has been proposed to insert an insulating frame into a holder and rotate it at a desired position to engage these two parts.

[0004]

However, in such a technique, two operations of insertion and rotation are required at the time of assembling, and it takes a long time to assemble. For example, a terminal having a circuit pattern or an element of a deflecting device is required. When the area of the board is large, the insulating frame and the terminal board are likely to come into contact with each other, and it is difficult to rotate the holder particularly when engaging the insulating frame.

Although such a mechanism is suitable for securely engaging and fixing the holder and the insulating frame, it is necessary to disassemble and collect the parts for the purpose of recycling, which has been regarded as important in recent years. No special consideration was given until removal.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and enables a bend-upless deflection yoke to be assembled with an insulating frame and a holder by a simple structure and method. It is an object of the present invention to provide a cathode ray tube device in which a holder and a holder can be easily removed.

[0007]

In order to solve the above problems, a cathode ray tube device according to the present invention comprises a cathode ray tube having an envelope formed by a panel and a funnel, and a cathode ray tube which is provided outside the funnel of the cathode ray tube. In a cathode ray tube device comprising a deflection yoke disposed, the deflection yoke has an insulating frame provided with a horizontal deflection coil inside, and at least a portion furthest from the panel provided outside the insulating frame extends along the funnel. Having a vertical deflection coil having an inclined shape, and an auxiliary coil provided in a holder, wherein the insulating frame and the holder have elastic claws, one of which is inserted into the other, and the other of which is provided. Parts are engaged with each other.

[0008] By doing so, assembly and removal of the insulating frame and the holder can be easily performed.

Further, the cathode ray tube device of the present invention has at least one of the insulating frame and the holder having the claw portion and a guide portion facing the tip of the claw portion, and the other includes the claw portion. A holding portion located between the portion and the guide portion.

[0010] By doing so, the holder and the insulating frame are securely fixed.

Further, in the cathode ray tube device according to the present invention, the claw portion is cut and raised.

By doing so, it is possible to easily form the claw having elasticity.

Further, in the cathode ray tube device of the present invention, the tip of the claw portion has a partially chamfered or arcuate cross section.

By doing so, the removal of the insulating frame and the holder becomes easy.

[0015]

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

FIG. 2 shows an external view of the cathode ray tube device according to the present embodiment. The cathode ray tube device 1 has a cathode ray tube 5 in which an envelope is composed of a panel 2 having a phosphor screen therein and a funnel 4 having an electron gun inside a neck portion 3. A deflection yoke 6 is provided on the neck side for deflecting the electron beam emitted from the electron gun to almost the entire surface of the phosphor screen by the magnetic field distribution.

As shown in FIG. 3, the deflection yoke 6 is a horizontal deflection coil (not shown) wound inside the insulating frame 7.
A vertical deflection coil 8 wound outside the insulating frame 7;
Ferrite core 9 arranged outside vertical deflection coil 8
Behind the insulating frame 7 (when mounted on a cathode ray tube, the tube axis Z
And a holder 13 for holding a coma aberration correction coil 10 as an auxiliary coil, a convergence yoke 11, a terminal plate 12, and the like.

FIG. 1 is a diagram showing the configuration of the deflection yoke more clearly. The insulating frame 7 provided with a horizontal deflection coil (not shown), a vertical deflection coil 8 and a ferrite core 9 has a funnel shape, and when it is moved in a direction along the tube axis Z, its cylindrical portion 14 It is inserted into 13 openings and assembled.

As shown in FIG. 4, the cylindrical portion 14 of the insulating frame 7 is provided with a claw portion 15, a guide portion 16 and a projection 17 which are cut and raised, and the claw portion 15 has elasticity. . On the other hand, as shown in FIG. 5, the holder 13 includes a pedestal portion 18 and a cylindrical portion 19, and a part of the cylindrical portion 19 includes
It has a holding part 20 arranged substantially perpendicular to the wall of the cylindrical part 19.

When the insulating frame 7 and the holder 13 are assembled, the cylindrical portion 14 of the insulating frame 7 inserted into the opening 21 of the holder 13 has its claw 15 elastically deformed and the holder 20 of the holder. After passing through the opening 21 at the end, as shown in FIG.
Are fixed substantially in contact with the surface of the holding portion 20. In this state, the claw portion 15 is engaged with the holding portion 20 of the holder, and the holding portion 20 is sandwiched between the claw portion 15 and the guide portion 16, so that the insulating frame and the holder are engaged and fixed. Here, the thickness of the holding portion 20 is substantially the same as the distance between the claw portion 15 and the guide portion 16.

According to such a configuration, it is possible to assemble them simply by pushing the insulating frame into the holder. In addition, the holder and the insulating frame which have been assembled once are prevented from spontaneously coming off or shifting in that state. It can be fixed securely. Therefore, since the auxiliary coil provided in the holder can be securely held at a desired position, the image quality and color purity of the cathode ray tube can be improved.

Further, according to the above configuration, when the holder and the insulating frame are removed for recycling or adjustment of parts, the claws are pressed by a jig or the like toward the inside of the cylindrical portion of the insulating frame. It can be easily removed by removing the insulating frame from the holder. In addition, at this time, since the claw portion has a cut-and-raised shape that is easily elastically deformed, there is an operational effect that the claw portion is not easily damaged.

FIG. 7 is a view of the holder 13 as viewed from above. After the insulating frame and the holder are assembled, the claw portions provided on the cylindrical portion of the insulating frame are located at four positions 23a to 23d indicated by broken lines of the holding portion 20 of the holder 13. Here, it is preferable that at least three places for holding the claw part are provided.
More than the point is desirable. In the case of four tubes as in the present embodiment, the positions are desirably arranged symmetrically with respect to the tube axis Z of the cathode ray tube, and two positions close to each other and symmetrically with respect to the tube axis Z as in the present embodiment. They may be arranged, or a total of four places may be arranged on a 90-degree diagonal line of the circumference of the holding portion.

The holding portion 20 of the holder 13 is formed with depressions 24a and 24b. These depressions are located at positions corresponding to the projections 17 of the cylindrical portion 14 of the insulating frame shown in FIG. , Projection 17. Thereby, the holder and the insulating frame can be reliably fixed not only in the direction along the tube axis Z but also in the direction rotating with respect to the tube axis Z.

Here, an example of the size of the claw portion will be described with reference to FIG. The width W1 of the claw portion, the width W2 of the groove, and the length L of the claw portion can be appropriately selected depending on the thickness of the cylindrical portion of the insulating frame and the number of the claw portions. Insertion is easy, but the rigidity of the claw part is insufficient and it is easy to break,
On the other hand, if the claw portion is too thick, the rigidity is increased, but the elasticity is poor, and assembly is difficult. Appropriate dimensions of the claw are such that the width W1 of the claw is 3 to 8 mm and the length L of the claw is 6-1.
5 mm, the groove W2 around the claw portion is 0.5 to 1.5 mm.

Further, as the cut-and-raised angle θ of the claw 15 shown in FIG. 6 increases, the area of the tip 22 of the claw 15 engaging with the holder increases, so that secure fixing is possible. A strong force is required to hold down the claw with a jig when removing the claw. The appropriate cut-and-raised angle θ is 10 to 20 degrees.

In the present embodiment, the claw tip 22
Shows an example in which a cross section along the longitudinal direction of the claw portion is substantially flat between two substantially right angles. For example, as shown in FIG. 9, a shape in which a corner of the cross section is partially chamfered, or , FIG.
It is more preferable that the corners of the cross section be partially arcuate as shown in FIG. By doing so, when the claw portion 15 when removing the holder and the insulating frame is pressed toward the tube axis, the area to be engaged with the holder is reduced, and the pressing force with a jig or the like is reduced, or There is an advantage that the holding member 20 is hardly damaged by the holding member 20.

In this embodiment, the deflection yoke for inserting the cylindrical portion of the insulating frame into the holder has been described as an example. However, the present invention is not limited to this. A part may be inserted, and the claw portion may be formed on either side.

[0029]

According to the present invention, in a cathode ray tube device provided with a bend-upless type deflection yoke, the incorporation and removal of the insulating frame of the deflection yoke from the holder can be facilitated. Therefore, it is possible to reliably assemble the components of the deflection yoke, and it is possible to reduce the number of assembling steps and reduce the cost by enabling the components to be recycled.

[Brief description of the drawings]

FIG. 1 is a perspective view of a deflection yoke provided in a cathode ray tube device of the present invention before assembling an insulating frame and a holder.

FIG. 2 is a perspective view showing a cathode ray tube device of the present invention.

FIG. 3 is a perspective view of a deflection yoke provided in the cathode ray tube device of the present invention.

FIG. 4 is a partial perspective view showing a cylindrical portion of an insulating frame of a deflection yoke provided in the cathode ray tube device of the present invention.

FIG. 5 is a perspective view of a deflection yoke holder provided in the cathode ray tube device of the present invention.

FIG. 6 is a partial sectional view showing a claw portion and a guide portion of an insulating frame of a deflection yoke provided in the cathode ray tube device of the present invention, and a holding portion of a holder.

FIG. 7 is a top view of a deflection yoke holder provided in the cathode ray tube device of the present invention.

FIG. 8 is a front view of a claw portion of an insulating frame of a deflection yoke provided in the cathode ray tube device of the present invention.

FIG. 9 is a partial cross-sectional view showing another example of the shape of the claw portion of the insulating frame of the deflection yoke provided in the cathode ray tube device of the present invention.

FIG. 10 is a partial sectional view showing another example of the shape of the claw portion of the insulating frame of the deflection yoke provided in the cathode ray tube device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cathode ray tube device 2 panel 4 funnel 5 cathode ray tube 6 deflection yoke 7 insulating frame 8 vertical deflection coil 10 auxiliary coil 13 holder 15 claw

Claims (4)

[Claims] 1. A cathode ray tube device comprising: a cathode ray tube having an envelope formed by a panel and a funnel; and a deflection yoke arranged outside the funnel of the cathode ray tube, wherein the deflection yoke is provided inside. An insulating frame provided with a horizontal deflection coil, a vertical deflection coil provided outside the insulating frame and at least a portion farthest from the panel is formed along the funnel, and an auxiliary coil provided in a holder A cathode-ray tube device, wherein the insulating frame and the holder are inserted into one of the other and engaged with each other by an elastic claw provided on one of the two. 2. The method according to claim 2, wherein one of the insulating frame and the holder has a claw portion and a guide portion facing a tip of the claw portion, and the other includes a portion between the claw portion and the guide portion. 2. A holding portion located at a position (1).
The cathode ray tube device according to the above. 3. The cathode ray tube device according to claim 1, wherein said claw portion is cut and raised. 4. A tip of the claw portion has a partially chamfered or arcuate cross section.
4. A cathode ray tube device according to any one of claims 1 to 3.