KR100796681B1 - Explosion proof band and cathode ray tube therewith - Google Patents

Abstract

The present invention relates to an explosion-proof band for cathode ray tubes that prevents glass from scattering when cracks are caused by cracks, and that element coils are positioned on the front surface corresponding to the color sorting device, thereby increasing the effect of the device on the color sorting device.

The explosion-proof band comprises: a rectangular band body surrounding the outer peripheral surface of the skirt portion of the face panel; Ears attached to four corner portions of the band body, respectively; The long and short sides of the band body are bent and deformed so as to overlap the band body from one edge of the band body opposite the face panel, and a plurality of openings are continuous along the circumferential direction of the band body at one end facing the opposite edge of the band body. And an element coil support portion configured to support the element coil through the opening, wherein the opening center line connecting the plurality of opening centers along the circumferential direction of the explosion-proof band is connected from the ear center line connecting the four ear centers to the face panel side. Are spaced apart.

Cathode ray tube, explosion-proof band, element coil, color sorting device, face panel, funnel, ear, element

Description

Explosion proof band and cathode ray tube with same {EXPLOSION PROOF BAND AND CATHODE RAY TUBE THEREWITH}

1 is a perspective view of a cathode ray tube bulb equipped with an explosion-proof band according to the present invention.

FIG. 2 is a partial plan view of the cathode ray tube bulb shown in FIG. 1; FIG.

3 is a cross-sectional view taken along line II of FIG. 2.

4 is a partial plan view of the cathode ray tube bulb shown in FIG. 1;

Fig. 5 is a partial cross-sectional view of a cathode ray tube bulb for explaining a positional relationship between a color screening device and an element coil.

6 is a partial plan view of a cathode ray tube bulb equipped with an element coil;

7 is a cross-sectional view taken along the line II-II of FIG. 6.

8 is a schematic view for explaining an element coil supporting state using a fixing bracket.

9 is a perspective view of a cathode ray tube bulb according to the prior art;

The present invention relates to a cathode ray tube, and more particularly, to an explosion-proof band for a cathode ray tube having an element coil support for installing element coils while preventing glass from scattering when the bulb is expanded by cracks.

In general, a cathodic screen consisting of a shadow mask for separating the three-beam electron beam so that the three-beam electron beam emitted from the electron gun reaches the corresponding R, G, and B phosphors of the fluorescent screen, and a mask frame for supporting the shadow mask. Metal parts, such as inner shields, which shield the electron beam path emitted from the electron gun from the geomagnetic field are mounted.

These metal parts are magnetized by a geomagnetic field to form a magnetic field around them, which causes so-called mislanding that the electron beam does not reach the specified phosphor by changing the path of the electron beam traveling through the bulb.

Therefore, in the conventional cathode ray tube, as shown in FIG. 9, the element coil 3 is provided on the outer circumferential surface of the bulb 1 and the element current is supplied to the element coil 3 for 3 to 4 seconds each time the cathode ray tube is turned on. Therefore, the degaussing process removes the magnetization state magnetized inside the metal part during the previous cathode ray tube operation.

Here, in order to increase the effect of the device on both the color screening device and the inner shield, it is preferable to provide the device coil 3 over a wider area on the outer peripheral surface of the bulb 1. However, since the explosion-proof band 5 and the ear 7 of the bulb 1 are attached to the front part of the bulb 1, it is difficult to install the element coil 3 in the front part of the bulb 1, so that the effect of the device on the color screening device is reduced. It is not excellent.

Therefore, in recent years, a technique for installing an element coil using the explosion-proof band (5) has been researched, and the prior art related to this, US Patent No. 5,057,929 and US Patent No. 5,181,123 have a large number of protrusions on the outer periphery of the explosion-proof band Disclosed is a tab or clip receiving portion to form a device coil through it.

However, since the conventional explosion-proof band has to change the shape of the explosion-proof band according to the mounting conditions of the device coil, such as changing the position of the protruding tab or the clip housing when the mounting conditions of the device coil change, It is difficult to satisfy the installation conditions at the same time.

In addition, since the protruding tab or clip receiving portion is manufactured by conventional punching or piercing processing, sharp burrs are likely to occur at the edge of the protruding tab or clip receiving portion. Such a burr causes a problem of inducing a bulb rupture when the bulb surface is scratched by impacting the bulb.

In addition, the conventional explosion-proof band is provided with the above-described protruding tab or clip receiving portion at one edge of the explosion-proof band opposite to the rear portion of the bulb, so that even if the element coil is supported by the explosion-proof band, the device effect does not reach the front portion.

As a result, the conventional cathode ray tube does not have an excellent device effect on the color screening device, and there is a limit in that the magnetization state magnetized inside the color screening device may not be completely removed during the previous cathode ray tube operation.

Therefore, the present invention is to solve the above problems, an object of the present invention is to allow the device coil to be installed in various conditions in a variety of conditions, and to place the device coil on the front of the ear device effect on the color screening device It is to provide an explosion-proof band for strengthening and a cathode ray tube having the same.

In order to achieve the above object, the present invention,

The band body surrounding the skirt circumferential surface of the face panel, the ear attached to each of the four corner portions of the band body, and bent to overlap the band body from one side edge of the band body opposite the face panel at the long and short sides of the band body. A deformed, element coil support for continuously forming a plurality of openings along the circumferential direction of the band body at one end facing the opposite edge of the band body, and connecting the plurality of opening centers along the circumferential direction of the explosion-proof band; An opening center line provides an explosion-proof band for a cathode ray tube located on the face panel side from an ear center line connecting four ear centers.

As a result, the explosion-proof band according to the present invention installs the element coil on the front part corresponding to the color screening device to increase the effect of the device on the color screening device, and to facilitate the device coil under various conditions without changing the shape of the explosion-proof band. Has the advantage of installing.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a cathode ray tube bulb equipped with an explosion-proof band according to an embodiment of the present invention, and FIG. 2 is a partial plan view of the cathode ray tube bulb shown in FIG. 1.

As shown in the drawing, the cathode ray tube bulb 2 has a face panel 4 having a fluorescent screen (not shown) formed therein and having a color screening device (not shown), and a neck portion having an electron gun 6 mounted therein. (8) and the funnel (10) connecting the face panel (4) and the neck (8) is made integrally, and the inside maintains a high vacuum of about 10 ^-7 torr (torr).

The cathode ray tube bulb 2 is equipped with an explosion-proof band 12 on the outer circumferential surface of the skirt portion 4a of the face panel 4, and the explosion-proof band 12 has a circumferential length of the inner circumferential surface of the skirt portion 4a in a non-heated state. It is made slightly smaller than the circumferential length of the outer circumferential surface. Therefore, when the explosion-proof band 12 is inserted into the outer peripheral surface of the skirt portion 4a in a state of thermal expansion and cooling, the explosion-proof band 12 contracts and exerts a compressive force on the bulb 2.

Here, the explosion-proof band 12 according to the present embodiment is such that the element coil is easily installed under various conditions through the element coil support 14 described below, and the element coil is positioned at the front portion of the ear 16 so that the color Enhance device effects on sorting devices.

More specifically, the explosion-proof band 12 has a pair of long side portions 18a which are disposed to face the short axis direction (Y-axis in the figure) corresponding to the shape of the skirt portion 4a, and the long axis direction of the screen (in the figure). Band main body 18 which consists of a pair of short side part 18b arrange | positioned in the X-axis), and four corner parts 18c which connect the long side part 18a and the short side part 18b, and to which the ear 16 is attached. ) As the basic configuration.

The explosion-proof band 12 is bent from one edge of the band body 18 opposite the face panel 4 at the long and short sides 18a and 18b of the band body 18, and the band body 18 A plurality of openings 20 are continuously formed at one end toward the opposite edge of the device, and the device coil support 14 supports the device coil through the opening 20.

FIG. 3 is a cross-sectional view taken along line II of FIG. 2, wherein the element coil support 14 is bent from one edge of the band body 18 opposite the face panel 4 to be in contact with the band body 18. ), The inclined portion 24 bent at an angle from the end of the overlapping portion 22 toward the outside of the band main body 18, and the band main body toward the opposite edge of the band main body 18 from the inclined portion 24 end. And a coil support 26 that is bent at an angle to be parallel to 18.

The coil support portion 26 has a separation distance indicated by H from the surface of the skirt portion 4a, and includes an inclined portion 24 and a coil inclined portion 26 along the width direction (Z axis in the drawing) of the band body 18. Has a width of W1 and the inclined portion 24 has a width of W2. A plurality of openings 20 penetrating the coil support 26 are formed in the coil support 26, and a plurality of these openings 20 are continuously provided along the circumferential direction of the explosion-proof band 12.

In particular, the plurality of openings 20 formed in the coil support 26 are rectangular, as shown in FIG. 2, along the circumferential direction of the explosion-proof band 12 (X-axis in the figure) and the long side length of the L1 and the explosion-proof band. It has a rectangular shape with a short side width of W3 along the width direction (Z-axis in drawing) of (12), and the several opening 20 is mutually the same shape.

At this time, the explosion-proof band 12 according to the present embodiment, as shown in Figure 4, the opening center line connecting the center of the plurality of openings 20 in the circumferential direction (X-axis in the figure) of the explosion-proof band 12 (Indicated by an A line) is located on the face panel 4 side at intervals of Δd1 from an ear center line (indicated by a B line) connecting the four ear 16 centers.

The end of the coil support 26 (indicated by a C line) is also positioned on the face panel 4 at intervals of Δd2 from the ear center line (B line) connecting the centers of the four ears 16.

Therefore, in the present embodiment, when the element coil is hung on the opening 20 provided in the coil support 26, the element coil is positioned at the front portion of the ear 16. 4) The device coil 34 is disposed outside the color screening device 32 including the shadow mask 28 and the mask frame 30 to increase the effect of the device on the color screening device 32.

In addition, the element coil support 14 is configured to satisfy the six modification conditions described below, thereby taking a structurally stable form without affecting the tension strength of the explosion-proof band 12.

First, the length of one element coil support portion 14 along the circumferential direction of the explosion-proof band 12 among the four element coil support portions 14 provided at each of the long and short sides 18a and 18b of the band body 18. Is L2, and the sum of the lengths of the long sides of the openings 20 provided in the element coil support 14 is ΣL1, where L1 and L2 satisfy the following conditions.

ΣL1 <0.5L2

This is because if the value of ΣL1 exceeds 50% of the length of L2, deformation of the explosion-proof band 12 is caused when the opening 20 is processed.

And when the circumferential length of the band main body 18 is L3, the total length (Sigma) L2 of the element coil support part 14 along the circumferential direction of the explosion-proof band 12 satisfy | fills the following conditions.

0.5L3 <ΣL2 ≤1.0L3

This is because the length of ΣL2 may be equal to L3, and the element coil support portion 14 is not required because the corner portion 18c of the band main body 18 on which the ear 16 is provided does not need to structurally process the element coil support portion 14. The total length of may exceed 50% of the periphery length L3 of the band main body 18.

On the other hand, when the thickness of the band main body 18 is t, the maximum raising height of the element coil support 14 with respect to the surface of the skirt portion 4a, that is, the separation of the coil support 26 with respect to the surface of the skirt portion 4a. The distance H satisfies the following conditions.

2.0t <H

This means that the distance H of the coil support 26 to the surface of the skirt 4a must be at least twice the thickness t of the band body 18 so as to provide a space for the tie band or fixing bracket for element coil support. This is because it can be secured.

And the short side width W3 of the opening 20 provided in the coil support part 26 satisfies the full width W1 of the inclination part 24 and the coil support part 26, and the following conditions.

0.5W1> W3

When the value occupied by the short side width W3 of the opening 20 provided in the coil support part 26 with respect to the total width W1 of the coil support part 26 exceeds 50%, the strength of the coil support part 26 falls and overlaps. This is because the formation of the inclined portion 24 with respect to the portion 22 becomes difficult.

Incidentally, the inclination angle α of the inclined portion 24 with respect to the overlapping portion 22 satisfies the following condition.

α≥90 °

This is because when the inclination angle α of the inclined portion 24 with respect to the overlapping portion 22 is less than 90 °, the shape of the coil support 26 may be sharpened, which may be a hazard to the operator, and the workability of manufacturing may be deteriorated.

Finally, the overall width W1 of the inclined portion 24 and the coil support portion 26 satisfies the following condition with respect to the width W2 of the inclined portion 24.

(W1-W2) ≥0

This is because when the width W2 of the inclined portion 24 is larger than the overall width W1 of the coil support portion 26, the opening 20 cannot be formed in the coil support portion 26, so the width W2 of the inclined portion 24 must be the coil support portion. It is because it should be smaller than the total width W1 of (26).

In the present embodiment including the element coil support 14 having the above-described configuration, the bulb 2 is provided as the opening 20 provided in the coil support 26 has a distance of H from the surface of the skirt portion 4a. Without damaging the inner surface, the element coil 34 can be installed on the front of the ear 16 to increase the element effect on the color screening device 32.

6 to 8 are schematic views showing various configurations in which the element coils are provided in the explosion-proof band described above, and the element coils (eg, in the explosion-proof band 12 through the fixing member formed of the tie band 36 or the fixing bracket 38). 34 shows an example of installing.

First, as shown in FIGS. 6 and 7, the element coil 34 is positioned at the end of the coil support 26, and the tie band 36 is penetrated through the opening 20 of the explosion-proof band 12. By tying 34, the element coil 34 is fixed to the explosion-proof band 12.

On the other hand, as shown in Figure 8, the fixing bracket 38 used as a substitute for the tie band has a semi-circular annular portion (38a) to hang the element coil 34 to support, and the opening (opposite to the annular portion 38a) A fixing protrusion 38b penetrating 20 is provided to prevent the fixing bracket 38 from being separated from the explosion-proof band 12.

At this time, since the plurality of openings 20 are formed continuously in the element coil support 14 along the circumferential direction of the explosion-proof band 12, in this embodiment, the tie band 36 or the fixing bracket 38 is reworked. It is possible to easily change the installation position, the installation interval, and the like of the fixing member without changing or deforming.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

Thus, according to the present invention, the element coil is located in the front part of the ear to increase the element effect of the element coil on the color screening device, and the sharp burr does not contact the surface of the bulb and does not damage the bulb. In addition, the present invention can easily install the element coil under various conditions by arbitrarily modifying the position and installation interval of the tie band or the fixing bracket without structural modification of the explosion-proof band.

Claims (11)

A band body that wraps the outer circumferential surface of the face panel and includes a pair of long sides arranged in the short axis direction of the screen, and a pair of short sides arranged in the longitudinal direction of the screen, and four corner portions connecting the long sides and the short sides. Wow; Ears respectively attached to four corner portions of the band body; And A plurality of openings along the circumferential direction of the band body at one end toward the opposite edge of the band body, being bent and deformed so as to overlap the band body from one edge of the band body opposite the face panel at the long and short sides of the band body. And a device coil support for continuously forming a device to support the device coil through the opening, An explosion-proof band for a cathode ray tube, wherein an opening center line connecting a plurality of opening centers along a circumferential direction of the explosion-proof band is spaced apart from an ear center line connecting four ear centers on a face panel side. The method of claim 1, The element coil support portion overlaps with the band body at one edge of the band body facing the face panel, an inclined portion bent at an angle toward the outside of the band body at the end of the overlapping portion, and a band at the inclined end An explosion-proof band for a cathode ray tube including a coil support portion bent at a predetermined angle to be parallel to the main body and having a separation distance from the band main body, wherein a plurality of openings are formed in the coil support portion. The method of claim 2, Explosion-proof band for cathode ray tube located at the end of the coil support is spaced apart on the face panel side from the ear center line connecting the four ear centers. The method of claim 2, An explosion-proof band for cathode ray tubes, wherein the opening has a rectangular shape having a long side along the circumferential direction of the explosion-proof band and a short side along the width direction of the explosion-proof band, and the plurality of openings have the same shape. The method of claim 2, An explosion-proof band for cathode ray tubes, wherein the element coil support portion satisfies the following conditions. ΣL1 <0.5L2 Here, L2 represents the length of one element coil support portion along the circumferential direction of the explosion-proof band, L1 represents the long side length of any opening formed in the element coil support portion, and Σ L1 represents the long side length of the openings formed in the element coil support portion. The sum of all the values is shown. The method of claim 2, An explosion-proof band for cathode ray tubes, wherein the element coil support portion satisfies the following conditions. 0.5L3 <ΣL2 ≤1.0L3 Here,? L2 represents the entire length of the element coil support along the circumferential direction of the explosion-proof band, and L3 represents the circumferential length of the band body. The method of claim 2, An explosion-proof band for cathode ray tubes, wherein the element coil support portion satisfies the following conditions. 2.0t <H Where t represents the thickness of the band body and H represents the separation distance of the coil support to the skirt surface. The method of claim 2, An explosion-proof band for cathode ray tubes, wherein the element coil support portion satisfies the following conditions. 0.5W1> W3 Here, W1 represents the total width of the inclined portion and the coil support portion along the width direction of the explosion-proof band, and W3 represents the short side width of the opening provided in the coil support portion. The method of claim 2, An explosion-proof band for cathode ray tubes, wherein the element coil support portion satisfies the following conditions. α≥90 ° Here, α represents the inclination angle of the inclined portion with respect to the overlapped portion. The method of claim 2, An explosion-proof band for cathode ray tubes, wherein the element coil support portion satisfies the following conditions. (W1-W2) ≥0 Here, W1 represents the overall width of the inclined portion and the coil support portion along the width direction of the explosion-proof band, and W2 represents the width of the inclined portion along the width direction of the explosion-proof band. A bulb in which a face panel having a fluorescent screen formed on an inner surface thereof, a neck portion having an electron gun mounted therein, and a funnel connecting the face panel and the neck portion integrally; A color screening device having a shadow mask having a plurality of electron beam through-holes for electron beam separation, and a mask frame for supporting the shadow mask and installed inside the face panel; The band body attached to the outer peripheral surface of the skirt portion of the face panel, the ear mounted on the four corner portions of the band body, and the band body so as to overlap the band body from one side edge of the band body opposite the face panel at the long and short sides of the band body. An explosion-proof band having an element coil support, which is bent and deformed, and has a plurality of openings continuously formed at one end toward the opposite edge of the band body in the circumferential direction of the band body; And A device coil fixedly installed at an arbitrary position of the outer circumferential surface of the bulb and the explosion-proof band through a fixing member penetrating the opening of the device coil support, Cathode rays for installing element coils in the ear front portion corresponding to the color discrimination device are spaced apart from the ear center line connecting the four ear centers along the circumferential direction of the explosion-proof band from the ear center line connecting the four ear centers to the face panel side. tube.

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