JP2001167715A - Deflection yoke fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a deflection yoke to a CRT in an exact and easy manner. SOLUTION: The funnel of a CRT 1 has protrusions 20a, 20b. Also, on a separator 13 of a deflection yoke 4, there are formed locking nails 21a, 21b at portions (window part) where a horizontal deflection coil 10 is not wound. Upon fixing the deflection yoke, the protrusions 20a, 20b and the locking nails 21a, 21b are fitted with each other and fixed at the exact position, only by mounting the reflection yoke 4 on the CRT 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke fixing mechanism for fixing a deflection yoke to a cathode ray tube (CRT) such as a television and a computer display.

[0002]

2. Description of the Related Art Conventionally, in a CRT used for a television or a computer display, a deflection yoke for scanning an electron beam from an electron gun is provided outside the CRT. The deflection yoke is fixed to a CRT after its position is adjusted so that the display characteristics are best. Conventionally, there are the following mechanisms for fixing the deflection yoke.

FIGS. 9A and 9B are a side view and a front view showing an example of a deflection yoke fixing mechanism most frequently used at present. As shown, the cathode ray tube 1
The band 2 is screwed on the neck side of the
By inserting up to four rubber wedges 3a, 3b,... Into the gap between the CRT 1 and the deflection yoke 4, the deflection yoke 4
It is fixed to T1. Rubber wedges 3a, 3b, ...
A double-sided tape (not shown) is provided, and the CRT 1 and the rubber wedges 3a, 3b,. .. May be fixed with silicone rubber (not shown) to prevent the rubber wedges 3a, 3b,.

FIG. 10 is a side view showing an example of another deflection yoke fixing mechanism according to the prior art. FIG.
5A, screws 5a and 5 provided on the deflection yoke 4 side are used.
By pressing b, ... against the funnel of CRT1,
The deflection yoke 4 is fixed. In FIG. 10B, blocks 6a, 6b,... Having a surface parallel to the Z axis are attached to the funnel of the CRT 1, and screws 7a, 7b,. , 6
The deflection yoke 4 is fixed by pressing against the b. In FIG. 10C, a slide pin 8 that slides integrally with the deflection yoke 4 is provided on the opening side of the deflection yoke 4.
are provided, and the slide pins 8a, 8b,... are pressed against the funnel portion of the CRT 1, and when the positions are determined, the slide pins 8a, 8b,. Thus, the deflection yoke 4 is fixed.

Next, FIG. 11 is a conceptual diagram showing an example of a landing pattern on the phosphor screen of the CRT 1 depending on the position (front and rear) of the deflection yoke attached to the CRT. G
When adjusting the landing of (green), if the deflection yoke 4 is attached to the panel (fluorescent screen = front) side,
As shown in FIG. 11A, R (red), G (green) and B (blue) appear as landing patterns on the phosphor screen. When the deflection yoke 4 is mounted on the gun (= electron gun, rear) side, as shown in FIG. 11B, a landing pattern is formed on the phosphor screen as a landing pattern.
B (blue), G (green), and R (red) appear. Further, when the deflection yoke 4 is attached to the exposed position (normal position), only G (green) appears as a landing pattern on the phosphor screen as shown in FIG. If the mounting position of the deflection yoke 4 is not ensured, mislanding occurs and the color purity is reduced.

Next, FIGS. 12A and 12B are conceptual diagrams showing convergence of R (red) and B (blue) beams depending on the position (up, down, left and right) of a deflection yoke attached to a CRT. 12C and 12D are conceptual diagrams showing the distortion of the raster depending on the position (up, down, left and right) of the deflection yoke attached to the CRT. When the position of the deflection yoke 4 is shifted downward with respect to the CRT 1, FIG.
As shown in (a), a rotational shift of the R (red) and B (blue) beams occurs. FIG. 12B shows that when the position of the deflection yoke 4 is shifted to the left with respect to the CRT 1, R
The size of the (red) and B (blue) beams is shifted. The G (green) beam is omitted because it is located between the R (red) and B (blue) beams. Similarly, when the position of the deflection yoke 4 is shifted downward, as shown in FIG. 12C, raster distortion (image distortion) having a width different in the vertical direction occurs. Similarly, when the deflection yoke 4 is shifted to the left, raster distortion (image distortion) in which the right and left heights are different is generated as shown in FIG. If the mounting position of the deflection yoke 4 is not ensured in this way, the color bleeding increases, and surface distortion occurs, resulting in a screen that is difficult to see.

[0007]

By the way, the screens of CRTs such as televisions and computer displays have recently been flattened. In the conventional round screen, as described above, the convergence and the image distortion can be set to the best positions almost simultaneously by the swing adjustment (position adjustment) of the deflection yoke 4. However, when the screen becomes flat, the sensitivity difference between the convergence characteristic and the image distortion characteristic due to the swing adjustment of the deflection yoke 4 increases, and it is difficult to adjust the convergence and the image distortion only by adjusting the position of the deflection yoke 4. It has become to. Some deflection yokes 4 do not adjust the swing. in this case,
The convergence and the image distortion are adjusted by a correction circuit provided in the deflection yoke 4 in order to improve the accuracy. Also,
Image distortion has also been digitized, and is improved by moving a video signal. As described above, when the deflection yoke 4 is not adjusted to swing, the fixing mechanism of the deflection yoke 4 according to the related art as described above deteriorates productivity of a television receiver, a computer display, and the like, and leads to an increase in cost. is there.

Accordingly, an object of the present invention is to provide a deflection yoke fixing mechanism capable of accurately and easily fixing a deflection yoke to a CRT.

[0009]

According to a first aspect of the present invention, there is provided a deflection yoke fixing mechanism for fixing a deflection yoke to a funnel portion of a cathode ray tube. A plurality of protrusions are provided on the portion, and a plurality of protrusions are provided at positions corresponding to the plurality of protrusions on a portion of the deflection yoke on which the horizontal deflection coil mounted on the inner surface of the separator is not wound. The locking yoke is provided, and when the deflection yoke is mounted on the cathode ray tube, the deflection yoke is fixed by fitting the plurality of projections and the plurality of locking claws. I do.

In a preferred embodiment, in the deflection yoke fixing mechanism according to the first aspect, the plurality of locking claws are locked by enclosing the plurality of projections. May be provided.

In a preferred embodiment, in the deflection yoke fixing mechanism according to the first aspect, the plurality of locking claws are locked by sandwiching the plurality of projections. May be provided.

In a preferred embodiment, for example, in the deflection yoke fixing mechanism according to the second or third aspect, the plurality of locking claws are provided so as to mount the deflection yoke on the cathode ray tube. A tongue piece having elasticity for pressing the plurality of protrusions in a state where the tongues are fitted to the plurality of protrusions may be provided.

In a preferred aspect, in the deflection yoke fixing mechanism according to the first aspect, the deflection yoke includes a separator having a structure for accommodating a die-wound coil. The locking claw is
It may be provided on the separator of the deflection yoke, at a portion corresponding to a window of a coil wound coil mounted on the inner surface of the separator.

In a preferred embodiment, in the deflection yoke fixing mechanism according to the fifth aspect, the plurality of locking claws are locked by sandwiching the plurality of projections. May be provided.

In a preferred embodiment, in the deflection yoke fixing mechanism according to the present invention, the plurality of locking claws are provided so as to mount the deflection yoke on the cathode ray tube. A tongue piece having elasticity for pressing a funnel part of the cathode ray tube while being fitted to the plurality of projections may be provided.

According to the present invention, a plurality of projections provided on the funnel portion of the cathode ray tube and a portion on the separator of the deflection yoke where the horizontal deflection coil mounted on the inner surface of the separator is not wound Then, the deflection yoke is fixed by fitting a plurality of locking claws provided at positions corresponding to the plurality of projections. Therefore, the deflection yoke can be accurately and easily fixed to the cathode ray tube.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of the embodiment of the present invention. Parts corresponding to those in FIG. 9 are described with the same reference numerals. In the figure, CRT
An electron gun that emits an electron beam is enclosed in 1, and a deflection yoke 4 that deflects the electron beam emitted from the electron gun is attached outside the CRT 1.

FIG. 2 is a sectional view showing the structure of the deflection yoke of the present embodiment, and FIG. 3 is a front view showing the structure of the deflection yoke. 2, a deflection yoke 4 includes a horizontal deflection coil 10 for deflecting the electron beam to the left and right,
A vertical deflection coil 11 that deflects up and down is combined, and a core 12 made of ferrite is provided outside the vertical deflection coil 11 in order to increase the efficiency of the magnetic field generated by the deflection coils 10 and 11.
Is installed. The vertical deflection coil 11 and the core 12
Is mounted outside the separator 13 and is fixed by hot melt. On the neck side of the deflection yoke 4,
A ring magnet 14 for correcting an assembly error of the electron gun is mounted. The clad horizontal coil 10 is assembled inside the separator 13 and fixed by the separator 13 as shown in FIG.

Next, FIG. 4 is a side view showing an example of the deflection yoke fixing mechanism of the present embodiment. In the funnel of the CRT 1, projections 20a and 20b are formed integrally with the CRT 1. Further, when the deflection yoke 4 is inserted into the separator 13 of the deflection yoke 4 so as to be mounted on the CRT 1, a projection 20 provided on the funnel portion of the CRT 1 is formed.
Locking claws 21a and 21b are provided so as to wrap around the three side surfaces a and 20b.

Mechanically, simply inserting the deflection yoke 4 to mount it on the CRT 1, the projections 20a, 20b and the locking claws 21a, 21b are fitted, and accurate positioning with respect to the CRT 1 is simply performed. I can do it. Still,
When misconvergence or image distortion occurs, adjustment is performed by a correction circuit (not shown) provided in the deflection yoke 4 or a correction mechanism (not shown). These correction circuits or correction mechanisms are well-known and will not be described.

Next, FIG. 5A is a perspective view showing a separator structure of a deflection yoke provided with the above-described locking claw, and FIG. It is sectional drawing which shows the state which fitted. In the deflection yoke 4,
The separator 13 can be divided vertically, as shown in FIG.
(A) shows only the upper half thereof. Inside the separator 13, a plurality of grooves 30a and 30b around which the horizontal deflection coil 10 is wound are formed. The groove 30
a and 30b are formed only near the center of the core, and are not formed near the top. That is, the horizontal deflection coil 10 is not wound near the uppermost portion. Therefore, in the present embodiment, a locking claw 21a that fits so as to wrap around the protrusion 20a of the CRT 1 is provided on the flange portion of the separator 13 where the horizontal deflection coil 10 is not wound. Since this portion corresponds to a portion where a wedge is conventionally inserted, the overall length is longer than that of the existing deflection yoke, but the diameter of the opening is not increased.

The deflection yoke 4 having the above-described structure is connected to a CR
When mounted on T1, as shown in FIG.
The projection 20a is fitted with the locking claw 21a, and the deflection yoke 4 is fixed. It should be noted that the engaging claw 21a, in the fitted state, comes into contact with the protruding portion 20a and is pressed,
An elastic tongue (described later) for preventing the deflection yoke 4 from rattling is provided.

FIG. 6 is a perspective view showing the structure of the box-shaped locking claw shown in FIG. 4 or FIG. The locking claw is
Actually, as described above, a total of two are provided on the upper and lower sides. However, in order to simplify the description, only one locking claw will be described below, and the other has the same structure. Omitted. The protrusions 20a and 20b are CRT
1 and that is formed of glass, there is a taper for removing the funnel from the mold in the process of manufacturing the funnel, and the deflection yoke 4 is moved back and forth to land. Adjustment causes backlash.

Therefore, in the present embodiment, as shown in FIG. 6A, the tongue piece 2 having elasticity is provided at a portion corresponding to the upper and lower portions of the locking claw 21a provided on the separator 13 of the deflection yoke 4.
2 is provided. When the deflection yoke 4 is mounted on the CRT 1, the tongue piece 22 is constantly brought into contact with the corresponding projection 20a provided on the CRT 1 and pressed. Thereby, it is possible to prevent the above-mentioned play due to the taper.

FIG. 6 shows another example of the locking claw 21a.
As shown in (b), tongue pieces 23 and 24 having elasticity are provided at portions corresponding to the side surfaces of the locking claws 21a. And C
In the state where the deflection yoke 4 is mounted on the RT1, the tongue piece 2
The structure is such that 3, 4 are continuously brought into contact with the side surfaces of the corresponding projections 20a provided on the CRT 1 and pressed. Thereby, it is possible to prevent the above-mentioned play due to the taper.

Next, FIG. 7A is a perspective view showing a separator structure of a deflection yoke according to another embodiment of the present invention, and FIG. It is sectional drawing which shows the state which fitted. The corresponding parts shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted. As described above, in the deflection yoke 4, the separator 13 is
It can be vertically divided, and FIG. 6A shows only the upper half thereof. In the present embodiment, a pair of locking claws 25a, 25b are fitted to the flange portion of the separator 13 of the deflection yoke 4 where the horizontal deflection coil 10 is not wound so as to sandwich the projection 20a of the CRT 1.
Are provided along the curve of the funnel portion of the CRT 1.

The deflection yoke 4 having the above-described structure is mounted on a CR
When attached to T1, as shown in FIG.
Of the projection 20a and the locking claws 25a, 25b are fitted, and the deflection yoke 4 is fixed. The locking claws 25a, 25b
Each has a tongue piece 27 having elasticity for preventing backlash of the deflection yoke 4 by contacting and pressing the projection 20a in the fitted state.

Next, FIGS. 8A and 8B are perspective views showing a horizontal deflection coil and separator structure of a deflection yoke according to another embodiment of the present invention, and FIG.
It is sectional drawing which shows the state which the protrusion part of T and the latch claw fitted. In the present embodiment, the mold winding coil (upper half) 30 shown in FIG. 8A is replaced with a separator 33 shown in FIG.
This is applied to a deflection yoke having a structure to be housed inside. In this other embodiment, the separator 3 of the deflection yoke is used.
3, locking claws 26 a, 26 b, 27 a, 27 b that fit into portions corresponding to the windows of the mold winding coil 30 so as to sandwich each of the protrusions 20 a, 20 b of the CRT 1.
Are provided along the curve of the funnel portion of the CRT 1.

The deflection yoke having the above-described structure is mounted on a CRT.
8A, the projection 20a of the CRT 1 and the locking claws 26a and 26b, or the projection 20b on the side not shown and the locking claws 27a and 27b are fitted and deflected as shown in FIG. The yoke is fixed. The locking claws 26a, 2
6b, 27a, and 27b in the fitted state,
An elastic tongue piece 28 is provided to abut and press the funnel portion of the CRT 1 to prevent backlash of the deflection yoke.

According to the above-described embodiment, the projections 20a and 20b are provided on the funnel of the CRT 1, and
The locking claws 21 a and 21 are provided on the separator 13 of the deflection yoke 4.
b (or locking claws 25a, 25b, 26a, 26b)
By simply mounting the deflection yoke 4 on the CRT 1, the projections 20a, 20b and the locking claws 21a, 21b are provided.
(Or the locking claws 25a, 25b, 26a, 26b), and accurate positioning with respect to the CRT 1 can be simplified. Therefore, the rubber wedge which is stopped at three or four places as in the related art is not required. Therefore, the productivity of the combination of the CRT 1 and the deflection yoke 4 can be improved and wedges can be eliminated, so that the cost can be reduced.

In the prior art, the mounting position of the deflection yoke 4 shifts in a long-term temperature cycle depending on the force of inserting the rubber wedge. On the other hand, in the present embodiment, the projections 20a, 20b and the locking claws 21a, 21b (or the locking claws 25a, 25b,
6a, 26b), since there is little stress in the fitting portion, there is no concern that the position of the deflection yoke 4 will shift, and the reliability can be improved. Further, by providing elastic tongues at predetermined positions of the locking claws 21a, 21b (or the locking claws 25a, 25b, 26a, 26b), it is possible to prevent the deflection yoke 4 from rattling. Reliable and accurate positioning can be simplified.

According to the embodiment, the separator 13
In FIG. 5, the locking claws 21a and 21b (or the locking claws 25a and 25b) fitted to the projections 20a and 20b formed on the funnel portion of the CRT 1 are provided on the portions (windows) where the horizontal deflection coil 10 is not wound. , 26a, 26b) can be realized without increasing the external dimensions of the deflection yoke 4 or the CRT 1.
Also, the locking claws 21a, 21b (or the locking claws 25a,
25b, 26a, and 26b) are integrated with the separator 13, so that there is an effect that rattling is hardly generated and vibration and impact are strong.

[0033]

According to the first aspect of the present invention, the plurality of projections provided on the funnel of the cathode ray tube and the horizontal deflection mounted on the separator of the deflection yoke and mounted on the inner surface of the separator. Since the deflection yoke is fixed by fitting a plurality of locking claws provided at positions corresponding to the plurality of projections to a portion where the coil is not wound, the cathode ray tube is This has the advantage that the deflection yoke can be fixed accurately and easily.

According to the second aspect of the present invention, since the plurality of projections are locked by enclosing the plurality of projections, the deflection yoke can be accurately positioned with respect to the cathode ray tube. , And can be easily fixed.

According to the third aspect of the present invention, since the plurality of projections are engaged with the plurality of engagement claws to engage the projection, the deflection yoke can be accurately positioned with respect to the cathode ray tube. , And can be easily fixed.

According to the fourth aspect of the present invention, the plurality of locking claws are provided with tongue pieces, and the plurality of projections are fitted to the plurality of projections so as to mount the deflection yoke on the cathode ray tube. Then, since the projection was pressed by the tongue piece,
Advantageously, the deflection yoke can be more accurately and easily fixed to the cathode ray tube, and the deflection yoke can be prevented from rattling.

According to the fifth aspect of the present invention, a deflection yoke provided with a separator having a structure for accommodating a mold winding coil is used, and the plurality of locking claws are provided on the deflection yoke separator. The deflection yoke can be accurately and easily fixed to the cathode ray tube since the deflection yoke is provided at a portion corresponding to the window of the die-wound coil.

According to the sixth aspect of the present invention, the plurality of locking claws lock the plurality of projections by sandwiching them, so that the deflection yoke can be accurately positioned with respect to the cathode ray tube. , And can be easily fixed.

According to the present invention, the plurality of locking claws are provided with tongue pieces, and the plurality of projections are fitted to the plurality of projections so that the deflection yoke is mounted on the cathode ray tube. Since the funnel portion of the cathode ray tube is pressed by the tongue, the deflection yoke can be accurately and easily fixed to the cathode ray tube, and the deflection yoke is prevented from rattling. Is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a structure of a deflection yoke according to the embodiment.

FIG. 3 is a front view showing the structure of the deflection yoke of the embodiment.

FIG. 4 is a side view showing an example of a deflection yoke fixing mechanism of the embodiment.

FIG. 5 is a perspective view showing a core structure of a deflection yoke provided with a locking claw, and a cross-sectional view showing a state in which a projection of a CRT is fitted with the locking claw.

FIG. 6 is a perspective view showing the structure of the box-shaped locking claw shown in FIG. 4 or FIG. 5;

FIG. 7 is a perspective view showing a core structure of a deflection yoke according to another embodiment of the present invention, and a cross-sectional view showing a state where a projection of a CRT and a locking claw are fitted.

FIG. 8 is a perspective view showing a horizontal deflection coil and a core structure of a deflection yoke according to another embodiment of the present invention, and a CRT.
FIG. 4 is a cross-sectional view showing a state where the projections of FIG.

FIG. 9 is a side view and a front view showing an example of a deflection yoke fixing mechanism according to the related art.

FIG. 10 is a side view showing another example of a deflection yoke fixing mechanism according to the prior art.

FIG. 11 is a conceptual diagram showing an example of a landing pattern on the phosphor screen of the CRT 1 depending on the position (front and rear) of a deflection yoke attached to the CRT.

FIG. 12 is a conceptual diagram showing convergence and raster distortion depending on the position (up, down, left and right) of a deflection yoke attached to a CRT.

[Explanation of symbols]

1. CRT (cathode ray tube), 2. Band, 4. Deflection yoke, 20a, 20b Projection, 21a, 21b
... locking claw, 22 ... tongue piece, 23, 24 ... tongue piece, 25
a, 25b: locking claw, 27: tongue piece, 26a, 26
b, 27a, 27b: locking claw, 28: tongue piece

Claims (7)

[Claims] 1. A deflection yoke fixing mechanism for fixing a deflection yoke to a funnel portion of a cathode ray tube, wherein a plurality of projections are provided on a funnel portion of the cathode ray tube, and the deflection yoke is on a separator inside the separator. A plurality of locking claws are provided at positions corresponding to the plurality of projections on a portion where the horizontal deflection coil to be mounted is not wound, and when the deflection yoke is mounted on the cathode ray tube, the plurality of locking claws are provided. By fitting the projection and the plurality of locking claws,
A deflection yoke fixing mechanism, wherein the deflection yoke is fixed. 2. The deflection yoke fixing mechanism according to claim 1, wherein the plurality of locking claws have a structure for locking by enclosing the plurality of projections. 3. The deflection yoke fixing mechanism according to claim 1, wherein the plurality of locking claws have a structure for locking by sandwiching the plurality of projections. 4. The tongue having elasticity for pressing the plurality of projections in a state where the plurality of engagement claws are fitted to the plurality of projections in order to mount the deflection yoke on the cathode ray tube. The deflection yoke fixing mechanism according to claim 2, further comprising a piece. 5. The deflection yoke includes a separator having a structure for accommodating a mold winding coil, and the plurality of locking claws are on a separator of the deflection yoke and are mounted on an inner surface of the separator. 2. The deflection yoke fixing mechanism according to claim 1, wherein the deflection yoke fixing mechanism is provided at a portion corresponding to a window of the mold winding coil. 6. The deflection yoke fixing mechanism according to claim 5, wherein the plurality of locking claws have a structure for locking by sandwiching the plurality of projections. 7. The plurality of locking claws have elasticity to press a funnel portion of the cathode ray tube when fitted to the plurality of projections in order to mount the deflection yoke on the cathode ray tube. 7. The deflection yoke fixing mechanism according to claim 6, further comprising a tongue piece.