KR910004058Y1 - Spring for supporting mask of cathode ray tube - Google Patents

Abstract

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Description

Spring for mask support of CRT

1 is a schematic configuration diagram of a CRT.

2 is a conventional mask support spring.

3 is a perspective view of a spring-supported mask supporter of the present invention.

4 is a perspective view of the present invention.

5 is a plan view of the present invention.

6 is a cross-sectional view of the present invention.

* Explanation of symbols for main parts of the drawings

1 high expansion metal plate 2 low expansion metal plate

3: stud pin hole 4,4 ': weld face

5 protrusion 6,6 'groove part

The present invention relates to a leaf spring for elastically coupling the mask support installed in the inside of the color-brown tube to the panel, in particular, a structure in which elasticity is applied from both sides from the center of force to impart elasticity to a large standard. To provide a leaf spring.

In general, the shadow mask S and the inner shield I embedded in the color-brown tube are assembled to the frame F to form a mask support, which is embedded in the inner wall of the panel P as shown in FIG. Coupled to the studpin (studpin) that is made, during the manufacturing process, the panel (P) is repeatedly removed and mounted several times to form a screen surface on the inner surface. At the time of mounting, the plate spring (K) attached to the frame (F) has elasticity to be fitted or detached from the stud pin (T). The conventional spring is inclined plate spring body as shown in FIG. One side is welded on the frame F to (K), and a pin hole is drilled in the end portion floating in the air so that the stud pin T is fitted.

That is, the spring (K) is to cushion the one end, and because the hook (H) is interposed in the part welded to the frame (F), when the internal heat is conducted, the hook is bent while bimetallic action The mask support (shadow mask + frame + inner shield) with the stud pin (T) as a fixed point is moved forward to compensate for the deviation of the beam scan line against thermal expansion of the shadow mask (S). .

Therefore, the spring (K) and the hook (Hook) is a common technique until now to compensate for the removal, mounting and movement of the mask support, but this is effective in the small-brown tube, but difficult enough for the rigidity of the elastic modulus in large specifications It is inherent.

In order to solve the above problems, the present invention has a plurality of welding contacts, and its purpose is to be able to receive the elasticity of the pressure divided on both sides.

Another object of the present invention is to compensate for the action that the leaf spring is bent forward during thermal deformation of the shadow mask by bonding the thermal expansion to different materials based on the horizontal center line.

In order to achieve the above objects are described in detail with reference to the accompanying drawings, the characteristic configuration, operation and effects of the present invention as follows.

4 is a perspective view showing the configuration of the present invention, and welded to the center of the frame (F) of the mask support shown in FIG. In other words, in forming the rectangular plate body K, the two sides are joined to each other by the high-expansion metal plate 1 and the low-expansion metal plate 2 for thermal deformation, with the lateral center line X as a reference line, The stud pin hole 3 was punched out, and it was bent when it was left at right angles at both sides, and the welding edge 4 and 4 'were formed.

The above configuration as a whole In the front high-expansion metal plate 1, a protruding portion 5 is formed in the center to form a clearance gap for the stud pin hole 3, and grooves 6 and 6 'are elongated from the inner side thereof. It formed a range that bends over time.

According to the present invention configured as described above, when the spring is placed at the center of the outer periphery of the frame F and attached to the welding surface 4, 4 'by electric resistance welding, the stud pin hole 3 is fixed. Elasticity is given around

Therefore, when the frame F is detached and mounted on the inner surface of the panel P, it is to be detached or mounted from the stud pin T by pressing the center of the spring as shown in Fig. 6. As the spring force is acted on both sides, the elasticity is doubled. Not only torsional deformation can be prevented.

In addition, as shown in FIG. 5, when the shadow mask S starts to thermally expand due to the heat generated inside the CRT during use, the high expansion metal plate 1 of the spring has a coefficient of expansion compared to the low expansion metal plate 2. As it becomes larger and bends forward, it plays a role of compensating for the deformation of the shadow mask.

The present invention as described above firmly supports the inner mask supporter, and has a function of compensating for the weakening of the spring force and compensating for the thermal deformation without torsion, thereby providing an excellent effect in the manufacture of large CRT tubes, which have been difficult to date. It is a useful design to provide.

Claims (1)

In constructing the rectangular plate body K, the high-expansion metal plate 1 and the low-expansion metal plate 2 are bonded to each other in the transverse direction, and the stud pin holes 3 are drilled in the center, and both sides are bent stepwise. A CRT mask comprising a weld surface 4, 4 ', and having a protrusion 5 formed at the center of the high-expansion metal plate 1, and having grooves 6, 6' long on both sides thereof. Spring for the support.