KR890006360Y1 - Crt tube - Google Patents

Abstract

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Description

Cathode ray tube

1 to 6 are explanatory diagrams of a conventional cathode ray tube.

7 to 9 are explanatory views of one embodiment of a shadow mask support spring of a cathode ray tube according to the present invention.

10 to 14 are explanatory views of another embodiment of a shadow mask support spring of a cathode ray tube according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Face panel 2a, 2b, 2c: Panel pin

3: phosphor film 4: shadow mask

5: shadow mask frame 6a, 6b, 6c: support spring

7a, 7b. 7c: fitting hole 8b, 8c: slit

9b.9c: Small hole 10b, l0c: Concave groove

11b, 11c: bend portion 12b, 12c: concave groove

The present invention is suitable for cathodic tubes, in particular, support studs (panel pins) embedded in an inner surface of a face panel and a mask support spring for shadow mask support opposed to an inner surface of a face panel. A structure of a mask support spring with an auxiliary means of fitting in operation.

1 and 2 are main cross-sectional views and main plan views for explaining an example of a cathode ray tube. In this figure, at least three metal panel pins 2a, 2b, which have a truncated cone shape at a predetermined position on the inner wall of the glass face panel 1 as shown in the enlarged cross-sectional view of FIG. (2c) is permanently buried. In addition, a shadow mask 4 in which a phosphor film 3 is deposited on the inner surface of the panel 1 and a plurality of pores are formed in a thin plate facing the phosphor film 3 is formed. Is fixed. The shadow mask 4 is fixed to its peripheral edge by welding to the ring-shaped mask frame 5. On the outer circumferential surface side of the mask frame 5, a leaf spring shape for supporting the shadow mask 4 at a position facing the panel pins 2a, 2b, and 2C as shown in the enlarged plan view in FIG. The supporting springs 6a, 6b, and 6c are welded and fixed. In addition. These support springs 6a, 6b, and 6c have holes 7a, 7b, and 7c that can be fitted with the cone-shaped panel pins 2a, 2b, and 2c, respectively. Are formed respectively, and each of the holes 7a of these support springs 6a, 6b, and 6c. (7b) and (7c) are respectively fitted to each of the panel pins 2a, 2b, and 2c facing each other as shown in the enlarged cross-sectional view of Fig. 5, and are supported on the inclined surface of the pin of the cone shape. By the elastic force, the mask frame 5 is fixed to a predetermined position.

In the cathode ray tube composed of this, the shadow mask 4 needs to be mounted or separated from the face panel 1 during the formation of the phosphor film 3 and the formation of the aluminum deposition film not shown on the upper surface thereof.

Therefore, in order to attach the shadow mask 4 to the face panel 1, one of the support springs of the shadow mask frame 5, for example, the hole 7a of the support spring 6a of the long side shaft is opposed thereto. Insert the panel pin (2a) into the beam. Next, both of the support springs 6b and 6c of the short wall shaft are held together with the mask frame 5 and brought close to the panel pins 2b and 2c facing each other. In this case, the support spring 6a on the long side is separated by the elastic force in the direction away from the panel pin 2a by the elastic force, and in that state, the support springs 6b and 6c on the short axis are supported. When adjacent to the panel pins 2b and 2c facing each other, as shown in FIG. 6, each of the holes 7b and 7c of the support springs 6b and 6c on the short side has the panel pins 2b. Cannot be fitted with (2c). For this reason, the mask frame 5 is pushed strongly in the direction of the panel pin 2a of the long side, and each hole 7b of the support springs 6b and 6c of the short side is provided. In addition to (7c) and panel pins (2b) and (2c), it is necessary to match the positions. In addition, since the support springs 6b and 6c on the short side are positioned in the direction away from the mask frame 5 by the elastic force in the state, the respective holes 7a and 7b are separated from each other. The panel pins 2b face each of the holes 7b and 7c of the support springs 6b and 6c so as to be farther in the direction of the face panel 1 than the tip portions of the panel pins 2b and 2c. Cannot be fitted with (2c). Therefore, it is required that the support springs 6b and 6c of the short side shafts be strongly adhered in the mask frame 5 direction while simultaneously pressing the mask frame 5 in the panel pin 2a direction. Then, when the holes 7b and 7c of the support springs 6b and 6c on the short side are exactly opposed to the panel pins 2b and 2c facing each other, the support spring 6b on the short side , By slowing down the force that was pressed in the mask frame direction in the mask frame direction, the holes 7b and 7c of the support springs 6b and 6c are completely connected to the corresponding panel pins 2b and 2c, respectively. Is fitted.

However, in the mounting means of the shadow mask according to the above configuration, the stress of attaching the support spring 6a on the long side in the direction of the panel pin 2a, and the support springs 6b and 6c on the short side are mask frames. (5) stresses pressed in the direction and the alignment of the support springs (6b), (6c) of the holes (7b), (7c) and the panel pins (2b), (2c) facing them for fitting Since the control of the stress in the other direction is required, the shadow mask 4 is deformed in contact with the face panel 1 during operation, or the support springs 6a, 6b, and 6c are face panel 1 during operation. There is a drawback that the frequency of deterioration of the wind is very high due to deformation in contact with the end of the crank, or damage to the face panel 1.

Therefore, the present invention provides a guide for guiding the panel pin in the vicinity of the panel pin fitting hole of the support spring. An object of the present invention is to provide a cathode ray tube in which a panel pin is positioned near a fitting hole of a support spring so that the shadow mask can be easily and reliably fitted in an appropriate operation.

Next, the present invention will be described in detail with reference to the drawings.

Figure 7 is an enlarged plan view of the main portion seen from the outer side for explaining an embodiment of the shadow mask support spring applied to the cathode ray tube, for example, a 5 inch color CRT tube according to the present invention, the same symbol as the above-described The description is omitted. In this figure, in the fitting hole 7b of the support spring 6b on the short side side, a slit 8b serving as a guide for the panel pin 2b continuously facing the fitting hole 7b is provided in the longitudinal direction. It is formed integrally. Meanwhile. The support spring 6c provided on the short side of the opposite side is integrally formed with the slit 8c as a guide of the panel pin 2c which faces the same fitting hole 7c continuously.

In the support spring 6a on the long side, not shown, only the fitting holes 7a are formed in the panel pins 2a as in the prior art.

In such a configuration, the mounting method of the shadow mask 4 in the face panel 1 is as follows. That is, since the face panel 1 and the shadow mask 4 are small in size, the support springs 6b and 6c of the short side are normally held with one hand, for example, by the thumb and the finger of the right hand, so as to be held in a mask frame. The gap between (5) and the support springs 6b and 6c is kept in a narrowed state, and the panel pin 2a on the long side and the support spring 6a are fitted. Next, panel pins 2b and 2c facing the support springs 6b and 6c with this while the support springs 6b and 6c on the short side supported by the right hand are supported by the right hand. Close to nearby. At this time, the tip portions of the panel pins 2b and 2c in the shape of a truncated cone are continuously formed in the fitting holes 7b and 7c of the support springs 6b and 6, as shown in FIG. It fits into the slit 8b, 8c. In this case, each slit 8b. The width of 8c is approximately the same as or larger than the tip diameter of each panel pin 2b, 2c, and the fitting hole 7b. Since each of the supporting springs 6b and 6c is formed to have a size smaller than the diameter of 7c, each of the supporting springs 6b and 6c is temporarily supported by the respective slits 8b and 8c only at the tip portions of the panel pins 2b and 2c. do. Next, by pushing the entire shadow mask 4, in this case, the mask frame 5 in the direction of the panel pin 2a on the long side, each of the slits 8b and 8c is guided to support each of the supporting springs 6b. And 6c move to the tip ends of the panel pins 2b and 2c, and finally, as shown in Fig. 9, the panel pins 2b and 2c on the short sides are fitted with fitting holes 7b. , 7c is fitted securely. In this case, the width of each of the slits 8b and 8c is equal to or smaller than the diameter of each of the fitting holes 7b and 7c, so that each panel pin is inserted into each of the fitting holes 7b and 7c once. (2b). Although 2c is pressed by the elasticity of each support spring 6b, 6c, it does not return to each slit 8b, 8c at all.

FIG. 10 is an enlarged plan view of a main portion for explaining another embodiment of a shadow mask support spring applied to a cathode ray tube according to the present invention, for example, a 5 inch color brown tube. In this figure, each of the supporting springs 6b and 6c on the short side is provided as a guide for fitting the short side panel pins 2b and 2c, not shown in the drawing, to fit the fitting holes 7b and 7c. ), The small holes 9b and 9c are formed integrally with each other.

According to such a structure, since the center distance of each fitting hole 7b, 7c and each small hole 9b, 9c can be fitted by the above-mentioned means, each support spring ( 6b) and (6c), the displacement amount is small, and thus is most suitable for the application of a small cathode ray tube with a small gap between the mask frame 5 and the inner wall of the face panel 1, which are not shown.

FIG. 11 is an enlarged plan view of a main portion for explaining another embodiment of a shadow mask support spring applied to a cathode ray tube according to the present invention, for example, a 5 inch color brown tube. In this drawing, the support springs 6b and 6c on the short side side are fitting guides 7b and 7c as fitting guides of the short side panel pins 2b and 2c, not shown. ) And each slit 10b having an L shape in succession. 10c is integrally formed, respectively.

Even in such a configuration, the slit (10b) can be fitted by the means as described above and in the mounting and dismounting direction of the mask frame (5), which is omitted simultaneously. Since the 10c is formed, the mounting and detaching operations of the phosphor frame 3 and the mask frame 5 at the time of forming the aluminum intermediate film become very easy.

FIG. 12 is a view for explaining another embodiment of the shadow mask support spring applied to the cathode ray tube according to the present invention, for example, a 5 inch color brown tube, and this figure (a) is an enlarged plan view of a main part, this figure (b) Is a sectional view taken along the line II 'of FIG. (A), and (C) shows a cross-section II-II' of the drawing (a). In these drawings, the supporting springs 6b and 6c on the short side are continuous with the fitting holes 7b and 7c as fitting guides for the panel pins 2b and 2c on the short side. Thus, the recesses 10b and 10c are formed integrally with each other. In this case, the widths of the recessed grooves 10b and 10c are approximately the same as or larger than the tip diameters of the panel pins 2b and 2c, and the fitting holes 7b and 7c have the same width. It is formed with a dimension smaller than the diameter.

According to such a structure, the front-end | tip part of each panel pin 2b, 2c of a short side is inserted in each recessed groove 10b, 10c, and these recessed grooves 10b, 10c serve as a guide, By moving the shadow mask frame 5, which is not shown, in the direction of the panel pin 2a on the long side, the fitting holes 7b and 7c are finally faced to the respective panel pins 2b and 2c. It will fit securely in the

13 is a view for explaining another embodiment of the shadow mask support spring applied to the cathode ray tube according to the present invention, for example, a 5 inch color brown tube, and this figure (a) is an enlarged plan view of the main part, b) is a sectional view taken along the line III-III 'of FIG. In these figures, each of the supporting springs 6b and 6c on the short side is used as a guide for fitting the panel pins 2b and 2c on the short side to each fitting hole 7b and 7c. Next, the bent portions 11b and 11c each having their ends bent in an L-shape are formed. In this case, the axis extending along the bent portion at the center of the fitting holes 7b and 7c and the distance of the bent portion are approximately equal to or larger than t-1 of the tip diameters of the panel pins 2b and 2c. And a size smaller than t-1 of the diameters of the fitting holes 7b and 7c. Also in this configuration, the tip ends of the panel pins 2b and 2c on the short axis contact the bent portions 11b and 11c, respectively, which serve as guides, and the shadows not shown in this contact state are shown. By moving the mask frame 5 in the direction of the panel pin 2a on the long side side, each of the fitting holes 7b and 7c is securely fitted to each of the panel pins 2b and 2c facing each other.

FIG. 14 is a view for explaining another embodiment of the shadow mask support spring applied to the cathode ray tube according to the present invention, for example, a 5 inch color brown tube. FIG. It is sectional drawing IV-IV 'of (a). In these figures, each of the supporting springs 6b and 6c on the short side is provided with fitting holes 7b and 7c as guides for fitting the panel pins 2b and 2c on the short side. The concave grooves 12b and 12c which are successively formed by drawing molding are formed in the respective sections.

Also in this structure, as shown in this figure (b), the front-end | tip part of the panel pins 2b and 2c of the short side is inserted in each recessed groove 12b and 12c, and this acts as a guide, By moving the mask frame 5, not shown, in the fitted state in the direction of the panel pin 2a on the long side, each of the fitting holes 7b and 7c is respectively faced by the panel pins 2b and 2c. Can be fitted securely).

In the above embodiment, only the case where the shadow mask support spring is applied to a small 5-inch color brown tube is described. However, the present invention is not limited thereto, and the present invention is not limited to this. It goes without saying that the above effects are obtained.

In addition, although the case where the support spring was provided in the shadow mask frame in the said Example was demonstrated, this invention is not limited to this, For example, the aperture which fixed this shadow mask integrally in the facing side of the shadow mask, for example, aperture Of course, the same effects as described above can be obtained even when applied to the support spring disposed on the grill.

As described above, the present invention allows the shadow mask to be easily and securely fitted in the proper operation by installing the guide of the panel pin near the panel pin fitting hole of the counter electrode support spring, so that the face panel, the shadow mask, and the support thereof can be fitted. Damage, deformation and the like of the spring can be reliably prevented, productivity can be improved, and a very high quality cathode ray tube can be obtained.

Claims (1)

The panel pins formed on the support springs 6a, 6b, 6c of the opposite electrodes in the panel pins 2a, 2b, 2c embedded to extend toward the observation on an inner wall surface substantially parallel to the observation of the face panel 1. In the cathode ray tube in which the fitting holes 7a, 7b, and 7c are fitted to face and support the counter electrode on the inner surface of the face panel, the panel pin fitting holes 7b of the support springs 6b and 6c are fixed. 7c), the direction in which the portion of the panel pins 2b and 2c to which the panel pins are fitted is smaller than the panel pin fitting hole at all times, and is larger than the panel pin tip dimension and is substantially perpendicular to the tube axis. A cathode ray tube characterized in that a slit (8b, 8c; 9b, 9c; 10b, 10c; 11b, 11c; 12b, 12c) for guiding panel pins having a contraction is formed.