JPH04332436A - Color picture-tube - Google Patents

Abstract

PURPOSE:To eliminate beam-lending errors due to disorder in the relative positions of a hole in a shadow mask of a photo-absorbent film and three kinds of groups of phosphor dots or groups of strips, all on the inner surface of a face panel so as to obtain a color picture-tube which outputs a distinct picture without dislocation of any color since the deformation of a shadow mask body- structure can be prevented. CONSTITUTION:A plurality of step-formed bent portions 12 are provided in a connecting portion 9 between a joining portion 8 welded to the bimetal supporting member 6 of a spring 7 and a locking portion 10 supported by a panel pin 13.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color picture tube, and more particularly to a support structure for a shadow mask structure.

0002

[Prior Art] Generally, in the manufacture of color picture tubes,
A shadow mask structure is used to form a light-absorbing film and three types of red, green, and blue phosphor dot groups or phosphor stripes on the inner surface of the face panel. Attachment and detachment are repeated each time a film and three types of phosphors are formed.

FIG. 3 is a partially cutaway perspective view showing an example of a welded structure between a spring and a bimetal support member of a conventional color picture tube, and FIG. 4 is a perspective view of the spring shown in FIG. 3.

As shown in FIG. 4, a conventional spring 16
was press-molded using a stainless steel plate for springs with a plate thickness of 0.3 to 1.0 mm.

As shown in FIG. 3, a conventional shadow mask structure 21 has a skirt portion 3 of a shadow mask 2 fixed to a frame 5 by welding, and a bimetal support member 6 fixed to the frame 5, as shown in FIG. The joint portion 17 of the spring 16 is fixed to the bimetal support member 6 by welding. Further, the spring 16 connects the hole 19 provided in the locking portion 20 to the face panel 1 via the connecting portion 18.
The face panel 14 is supported by a plurality of panel pins 13 embedded in the side wall of the face panel 14, and is arranged at a predetermined interval inside the face panel 14.

The shadow mask 2 has a thickness of 0.1 to 0.
After making a large number of holes 4 on a 2mm steel plate, it is press-formed,
A bimetal support member 6 is attached to the skirt portion 3.
Pocket portion 15 is provided so as not to come into contact with.

[0007]

SUMMARY OF THE INVENTION As described above, the spring connecting portion has a rectangular flat plate shape and a plate thickness of 0.5 mm.
Since it is relatively thin at 3 to 1.0 mm, it is easily deformed by external force, which causes the problem of deforming the shadow mask structure.

When the connecting portion of the spring is deformed by external force received during manufacturing, especially after the light-absorbing film and three types of phosphor dot groups or stripe groups are formed on the inner surface of the face panel, the shadow mask There was a problem in that the relative positional relationship between the holes, the light-absorbing film on the inner surface of the face panel, and the three types of phosphor dot groups or stripes was misaligned, resulting in beamlining errors, resulting in color misalignment. .

An object of the present invention is to provide a color picture tube that can prevent deformation of the shadow mask structure and provide clear images without color shift.

0010

[Means for Solving the Problems] The present invention provides a shadow mask, a frame for supporting and reinforcing the shadow mask, a plurality of bimetal support members welded to the frame, and a plurality of springs one end of which is welded to the bimetal support member. In the color picture tube, the shadow mask structure is welded to the bimetal support member of the spring, and the shadow mask structure is held on the face panel by supporting the spring on a panel pin of the face panel. The panel pin is characterized in that a plurality of stepped bent portions are provided at the connecting portion between the connecting portion and the locking portion supported by the panel pin.

[0011]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway perspective view showing a connection structure of a spring bimetal support member according to an embodiment of the present invention, and FIG. 2 is a perspective view of the spring shown in FIG. 1.

As shown in FIG. 2, the spring 7 is formed by pressing a spring stainless steel plate with a plate thickness of 0.3 to 1.0 mm, and includes a joint portion 8, a connecting portion 9, a locking portion 10, and a connecting portion 9. Due to the plurality of (three or more) bending parts 12 in the
The locking part 10 in which the hole 11 is drilled has a spring property with respect to the joint part 8. Due to the plurality of bent portions 12 in the connecting portion 9, the area of the connecting portion 9 has a structure that is not easily deformed by external forces in the thickness direction.

As shown in FIG. 1, this spring 7 is
The joint 8 is fixed to the bimetal support member 6 by welding,
Furthermore, the shadow mask structure 1 is attached to the face panel 14 by fitting the panel pin 13 into the hole 11 in the locking part 10 using the plurality of bent parts 12 in the area of the connecting part 9. Here, the fitting pressure and fitting angle of the hole 11 of the spring 7 with respect to the panel pin 13 can be adjusted by changing the magnitude and direction of the bending angle of the bending part 12 in the connecting part 9.

[0015]

[Effects of the Invention] As explained above, the present invention provides a plurality of bent portions in the connection portion of the spring to make it difficult to deform when external force is applied, thereby preventing deformation of the shadow mask structure. be able to. Therefore, it eliminates beam landing errors caused by disturbances in the relative positional relationships between the hole in the shadow mask, the light-absorbing film on the inner surface of the face panel, and the three types of phosphor dot groups or stripe groups, and produces clear images without color shift. This has the effect of providing a color picture tube.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a connection structure between a spring and a bimetal support member according to an embodiment of the present invention.

FIG. 2 is a perspective view of the spring shown in FIG. 1;

FIG. 3 is a partially cutaway perspective view showing an example of a connection structure between a spring and a bimetal support member of a conventional color picture tube.

FIG. 4 is a perspective view of the spring shown in FIG. 3;

[Explanation of symbols]

1, 21 Shadow mask structure 2 Shadow mask 3 Skirt part 4 Hole 5 Frame 6 Bimetal support member 7, 16 Spring 8, 17 Joint part 9,18 Connecting part 10, 20 Locking part 11, 19 Hole 12 Bending part 13 Panel pin 14 Face panel 15 Pocket part

Claims (1)

[Claims] 1. A shadow mask structure comprising a shadow mask, a frame for supporting and reinforcing the shadow mask, a plurality of bimetallic supporting members welded to the frame, and a plurality of springs having one end welded to the bimetallic supporting member. in a color picture tube in which the shadow mask structure is held on the face panel by supporting the spring on a panel pin of a face panel, a joint portion of the spring welded to the bimetal support member and supported on the panel pin; A color picture tube characterized in that a plurality of step-like bent portions are provided at a connecting portion between the locking portions.