JPS5816442A - Color picture tube - Google Patents

Abstract

PURPOSE:To prevent a permanent deformation from occurring in the positional relationship of a support body structure during a thermal treatment process by jointing in lamination a central elastic metal piece with almost the same coefficient of thermal expansion as that of a mask frame, a metal piece with a high coefficient of thermal expansion on one side of the lengthwise direction, and a metal piece with a low coefficient of thermal expansion on the other side to form the mask support body structure. CONSTITUTION:A shadow mask support body 30 is composed of a fine stripe- shaped central elastic metal piece 31 with almost the same coefficient of thermal expansion as that of a mask frame 17, a fine stripe-shaped metal piece 32 with a higher coefficient of thermal expansion than that of the central metal piece 31, and a fine stripe-shaped metal piece 33 with a lower coefficient of thermal expansion, both jointed in lamination along one edge portion of the lengthwise direction of the central piece, and individual metal pieces 31-33 are partially welded so as to form a convex cross section and to function as an elastic body. One end of this support body structure 30 is fixed to the mask frame 17, and the other end is coupled with a panel pin 20 planted on a panel inner wall.

Description

DETAILED DESCRIPTION OF THE INVENTION The eleventh aspect of the present invention relates to a color picture tube having a black mask as a color selection electrode, and features 1: its black mask support structure C;

In a color picture tube with a Kuyadoku mask, Il
The Jinshin Shadoku mask was heated by the impact of the electronic beam, and Shima*fli Shikuyadu! Color shifts occur because the electron beam path to the fluorescent screen defined by the electron beam transmission apertures in the screen changes. For this reason, the shadow mask support structure I: supports the master in close proximity to the fluorescent screen in the outer layer. Compensation means is provided to bring the light closer to the fluorescent screen.

As such compensation means, for example, special meeting 1844-3
Low thermal expansion metal plate and high heat 11!
A bimetal bonded with a metal plate is used as a part of the shadow mask support structure, or
119141!8 Report or US Patent No. 3513! S27
No. 1: As described, it is known that a shadow grower support structure is formed of a bimetallic material in which two types of metal plates, a low thermal expansion metal plate and a high thermal expansion metal plate, are arranged side by side in the longitudinal direction C.

In each of these known shadow mask support structures, one end is welded to a mask frame holding a black mask, and the other end is secured to a panel. In this case, in order to force the fixation of the mask-7 layer and the V-Yadok Master support structure, the mask frame and V-YFfpff must be fixed. It is welded to the support structure at multiple locations.

Although the shadow mask support structure described above has a sufficient function of preventing the electron beam from landing on the specific detection phosphor due to the temperature rise during operation of the color picture tube, It has become clear that the high-temperature heat received during the manufacturing process causes the following properties to deteriorate.

That is, in the manufacturing process 1 of the color picture tube, for example, in the exhaust process, the temperature is 400 to 450°C, and the temperature during operation of the color picture tube is 970°C.
Extremely high temperature heat l & luck is performed compared to 80Ci. As a result, in this process, Kuyadoku Mask, Mask 7 Ray ^
and Kuyado! The disk support structure also undergoes thermal expansion. By the way, the Kuyado mask support structure is made of bimetal, and the mask 7
The coefficient of thermal expansion is different from that of R, and thermal strain occurs at the joint C between the two. In other words, the supporting structure must be kept in line with the shadow master structure! On the side of the staff frame, the number is on the ai part.
They are fixed by spot welding at the welding point Z, and the thermal stress based on the sudden expansion difference between the two members acts on the welding point Z. High heating tin temperature 6; This thermal stress is extremely thick (, ・It may cause permanent deformation of the mask frame or shadow mask support structure mouth, and the relative positional relationship between the V Yado master and the fluorescent screen may shift. This can cause the color reproducibility of color picture tubes to deteriorate.Moreover, in order to reduce the effects of the original island distortion, it was essential to stabilize the island through a varnishing furnace.・The present invention prevents the occurrence of permanent deformation in the positional relationship between the mask frame and the mask frame I-holding structure in the production process of color picture tubes, and improves the relationship between a predetermined shadow mask and fluorescent screen. It is an object of the present invention to provide a color picture tube having a V-shaped mask support ellipse that is mechanically strong to maintain a positional relationship and has a strong spring constant of 1*M.

Next, one embodiment of the color picture tube of the present invention will be explained with reference to FIGS. 1 to 184.

That is, the envelope constituting the color picture tube with the black mask I consists of the panel 1, the luminescent light 2, and the base material U, the inward direction 12 of the spring kaυ is red, and the fluorescent screen o4I that actually lights up. Adhesion is formed.

Neck A31: is equipped with an electron gun. Shadow 1 made of soft iron. The mask has a large number of circular, rectangular, etc. electron beam permeable holes, and selectively allows the electrons and beams emitted from the electron gun 0 to reach the fluorescent screen 9-64. Fluorescent dots or stripes of a specific luminescent color are excited and emit light. An iron plate is formed around the shadow mask axis, and is held by mask frames a and η in the shape of rectangular rods, for example. The Kuyadoku mask a and the mask frame I are joined by spot welding locally. The shadow mask ae and the mask frame ^aη constitute a shadow mask s body ast.

Outer wall approximately parallel to tube axis CrJ of one 7-ray A6n -
2) 3 or 4 locations around the mask frame d: The shadow mask support structure (to) is identified by welding or the like. On the other hand, the skirt portion C of the panel riD is implanted so as to protrude into the envelope. To lock this Kuyado mask support structure (toward) in the panel bin
Therefore, the Kuyadu mask structure 0 is held elastically at a certain elasticity within the external device, and the shadow mask axis is fixed to the fluorescent station.
@4 are placed close to each other at a predetermined interval.

The 211th and 3rd rlA are Kuyadoku! The screen holding structure (2) is shown in the master frame (lηC is kept constant).

In other words, the V Yadoku mask support structure ■ is the master 7 frame ◆η
A strip-shaped central elastic metal piece (2) having the same coefficient of thermal expansion and a central elastic metal piece laminated and bonded along one longitudinal edge C of the principal surface of the central elastic metal piece (2). Laminated and bonded along the other edge in the longitudinal direction of the main surface of the strip-shaped high am tensile metal piece (to) having a higher coefficient of thermal expansion than the metal piece Al and the central elastic metal piece (2) It consists of a strip-shaped low thermal expansion metal piece (2) with a lower thermal ** coefficient than the central elastic metal piece (2).

The metal piece swam is partially or entirely welded to have a convex cross section, and acts as an elastic body as a whole.

Such a glossy bear trout! One end of the support structure ■ and the other,
The end 1 is the center part @C: and the phase 7LL is folded at a predetermined angle in the opposite direction. This V-yado? trout! The structure (to) is! 04 is welded to one end 11 on the outer side II@ which is almost parallel to the envelope axis of the mask frame @η, that is, the tube axis a■ - in this case, the S* part ■ with the mask frame pass is the central elastic metal piece.・Set several places on the layer part and attach it to 1gll1 (support). ! Attach the high thermal expansion metal piece (2) to the fin of the frame so that the fluorescent screen is positioned at the receiving side 6: On the other hand, attach the panel bin to a part of the central elastic metal piece at the other end (toward) of the V Yadoku mask support structure. Locking hole for fitting with -
is provided.

Vya Fri! The support structure (to) is color picture tube manufacturing 1.
The structure of the mask is a panel bottle @c: It is attached and detached many times, and in order to obtain vibration resistance, it is required to be a fairly strong elastic body. Furthermore, it is desirable that the elasticity not be impaired even by heat treatment at a high temperature of 400-450° C. in the color picture tube manufacturing process 1iLS.

! Use it for Star 7 Ray ^Iη! The cold rolled steel plate used has a thermal coefficient of 120X10 /C
Therefore, in this example, precipitation hardening type IXtl standard 6B1 (170r
-) ML-At-f's, island ini coefficient 116X10
/Cat-1000C, and annealed at 480° C. for 1 hour after rolling and forming. Bunnelby y (19c unusable material is glass island of panel 6υ *ii coefficient is 115X107011 degrees) 180r-ν・
Since it is made of an alloy, the central elastic metal piece 01 is similar to this.
The coefficient of 100-130X10 /C is the support structure (to)
, the engagement between the panel bins &: is also preferred. The panel bin (2) has a tapered side wall, into which the locking hole (to) of the support structure (to) is removably fitted, but if there is a large difference in the heat** coefficient between the two, 1. Both of them cause undesired bite, making it impossible to hold the Shadoku Master structure sea bream with precision.However, in this embodiment, such a problem does not occur.

Low I&Mabari metal piece (2) is 36 like amber
11-64Ps alloy (thermal J1-coefficient 15 x 10/c) is layered, while high heat** metal piece (total) is 8tf1m0
2 (III-! 0r-811-ν・, thermal expansion coefficient 173X10/C)
was used.

Details of the shadow mask support structure of the above-mentioned embodiment As shown in No. 411, each metal piece (
to) ai (to) each 1(・,)(・,)(・,
5゜Plate thickness ((11 was selected as 0.8■, and the length of the support structure (to) at one end (B) 4) is 27■ The length at the center (to) 4) is 42IIm, The length of the other end (to) is 4
) is 15m 1# The diameter of the locking hole ■ with the panel bin is 8m
The width (·4) (·l) of the laminated joint was set to approximately 2 m r−. # When using amber as a low thermal expansion metal piece (to), amber is mechanically weak at J] 1 degree, so considering the mechanical strength of the shadow mask support structure ω, the width of amber should be 173 or less of the total width of the support structure. desirable.

Now, the shadow mask support structure (to) constructed as described above is fixed by welding to the mask frame wholesale number, and the central elastic metal piece (goods) fitted with the panel bin ■ is approximately equal to both metals. Since it has a coefficient of thermal expansion, the high-temperature heat field jl (-
In this case, the thermal expansion of both members of the mask frame aη and the shadow mask support structure (to) at the welding point is almost equal, and the thermal stress acting on the welding point is extremely small due to the difference in the amount of thermal expansion. Welding part 1: Permanent deformation caused by shadow mask tAe and fluorescent mask 9-
A high thermal expansion metal piece (to) and a low thermal expansion metal piece (to) are floating from the mask frame an in the vicinity of the welding point 07), which does not cause a fatal defect in the color picture tube such as a misalignment of the positional relationship of the lens I. So 7 Yado Mask αe is Mask Frame Q? ) 4-Evacuation during holding is obtained, freedom in selecting the position of mounting the support structure circle is increased, and undesired stress is not generated during thermal deformation of the support structure. In other words, since the high thermal expansion metal piece (to) and the low thermal expansion metal piece (to) are fixed on the same side of the central elastic metal piece 0υ, when thermal expansion occurs, the short side of the support structure perpendicular to the longitudinal direction C The stress generated on both sides of the central elastic metal piece Gυ works in opposite directions and is canceled out as a whole, so that no undesired stress is generated.
- The cross-sectional thickness formed by the central elastic metal piece 01, the high thermal expansion metal piece 01, and the low thermal expansion metal piece is almost convex and has a mechanically strong shape, so it has elasticity as a support structure. The toughness increases, and therefore the thickness of each material can also be reduced. Therefore, the heat treatment of passing it through a stabilizing furnace, which was indispensable in the past, is not necessary (the two-piece collar holder reduces the manufacturing cost of the tube, and also simplifies the manufacturing of the support structure ω. It also simplifies the process of locking the tube with the panel bin (to). Even after heating, it is possible to make a contribution by maintaining a predetermined distance between the mask and the fluorescent screen even after heating.

In the above embodiment, the Tayadoku mask holding structure is composed of three metal pieces having different thermal expansion coefficients: a central elastic metal piece and high and low thermal expansion metal pieces provided on both sides of the central elastic metal piece through laminated joints. However, when moving the color picture tube 5
To compensate for the thermal expansion of the shadow master in the mask, an elastic metal piece having an expansion coefficient m approximately equal to that of the mask 7 frames, and one main surface of this elastic metal piece along one end edge in the longitudinal direction are used to compensate for thermal expansion of the shadow master. It is also possible to use a combination structure of high or low thermal expansion metal pieces laminated and bonded together. However, in this combination structure of the two, the difference in thermal expansion coefficient between the two metal pieces is inevitably small, and in order to completely compensate for the ffi degree change C:, it is necessary to weld the shadow mask support structure to the mask 7 frame. It is necessary to increase the distance between the point and the connecting part of the barrel, which means that the length of the mask support structure must be increased.The shadow master support structure with such a long length will cause vibration 1; Twisting and deformation in the thickness direction <Support structure C for supporting a heavy shadow mask structure does not satisfy the required characteristics. In contrast, the V mask support structure of the embodiment uses a low thermal expansion metal. It is possible to obtain the same eccentric position as that of a bimetal in which the pieces are brought together with their narrow sides, without causing an increase in the length of the support structure.

This has the advantage of not causing torsional deformation even when the color picture tube vibrates.

Figure 185 shows a shadow mask support structure used in another embodiment of the color picture tube of the present invention.

That is, the shadow mask support structure consists of a central elastic metal piece (43) made of ENJ1631, a low thermal expansion metal piece (43) made of umber, and a high heat*ii metal piece (42) made of 808302, each of which has metal pieces (41) (42). ) (
The lengths of the sheets 43) are 3.8m, 3.8m, and 3.8m, respectively, and two locking holes (44) for connecting to the panel bin are provided so that the central elastic metal piece 41υ is accommodated therein. In addition, the metal pieces (42) and (43) are laminated and joined by spot welding using a CI method, as shown by the x marks. In this embodiment, the locking hole portion (44) is connected to the central elastic metal piece.
Since only 1; is included, there is an advantage that the V-hat mask support structure is less likely to get caught in the panel bin during the manufacture of color picture tubes. Also, each metal piece (
41) (42) Since the difference in thermal expansion coefficient is small in the joints of (42) and (43), the thermal stress at the joints is not small even when the support structure is thermally placed. ■C: There was no need to join, and the mechanical strength was sufficient by spot welding as in this example.In this way, when the two metal pieces were spotted and joined by welding, welding was easy and took a short time. Since the bonding can be carried out at a low temperature, less heat is generated during bonding, the support structure is less likely to be deformed during the production of the shadow master support structure, and a support structure with an S degree can be obtained at a low cost.

Gang No. 4 Il! In the structure shown in FIG. 5, when each metal piece is sporally welded as shown in FIG.

When considering mechanical strength, it is desirable to weld continuously at the tip.

No. 6g shows a shadow master support structure (50) used in yet another embodiment-2 of the color picture tube of the present invention.

That is, the shadow mask structure includes a first low heat** metal piece (() precipitation hardening type low heat *a gold metal) made of amber as a low thermal expansion metal piece (53) 1i32-Co14-Ti1.
6-1e, rapid expansion coefficient 511X10 /C1'8000
? 30 analysis 8 hardness (1eX: 11600℃?2411
It is made of a second low thermal expansion metal piece (55) made of (1 am dull)

The central elastic metal piece (51) and the high thermal expansion metal piece (52) are made of gtrsts3t and 5U11302, respectively.

Each metal piece (54), (55), (51), and (52) is 3m, 3m, 5■, 3■ excluding the laminated joint, and the cross-sectional shape is that the metal pieces (51) and (54) are joined at the end surface. If the
This embodiment, which is integrated with 1 ml, has the advantage that the amount of amber having weak spring characteristics can be reduced, and a color receiving tube having a shadow master support structure with better vibration resistance C can be obtained.

[Brief explanation of the drawing]

11th i! FIGS. 4 to 4 are diagrams showing one embodiment of the color picture tube of the present invention. FIG. 1 is a schematic explanatory diagram of the color picture tube, and FIG. show! ! Part plan view, Figure 3 shows the V-yado mask structure mounted on panel 6 by the shadow master support structure.
; Main part cutaway showing the installed state! ! I, Fig. 4 is a perspective view of the shadow mask support, and Fig. S and Fig. 6 are other implementation reports of the color receiving tube of the present invention. It is a cross-supported structure. lO...Envelope 16...V Yadou Master 1
7...Mask frame 30.40,509・Shadokuma master 111 bodies 31
, 41.51... Central elastic metal piece 32.42, 52.
...High thermal expansion metal piece 33.53...Low thermal expansion metal piece Agent Patent attorney Inoue - Male Figure 2

Claims (1)

[Scope of Claims] (b) A kuyadoku mask structure consisting of a shadow mask having a large number of electron beam transmission holes, a frame holding this nyadou mask around the periphery, and a panel forming a self-portrait-two-fired screen; Along with this panel - Futai s!
! and a neck for holding the mask structure in opposition to the fluorescent screen within the neck. In the color picture tube L-, the shadow mask support structure has one end fixed to the mask 7 frame, the other end fixed to a panel bin implanted in the panel, and ! A central elastic metal piece having a coefficient of thermal expansion approximately equal to that of the frame; and a central elastic metal piece having a thermal expansion coefficient higher than that of the central elastic metal piece, which is laminated and bonded along one end edge in the longitudinal direction of the central elastic metal piece. a high thermal expansion metal piece having a coefficient of thermal expansion, and the other longitudinal edge i of one principal surface of the central elastic metal piece.
: A color picture tube comprising: a low heat** metal piece which is laminated and bonded along the central elastic metal piece and has a lower coefficient of thermal expansion than the central elastic metal piece. (2) The central elastic metal piece has a coefficient of thermal expansion of 100 to 130xlO/C, and the high thermal expansion metal piece has a coefficient of thermal expansion of 150x107'
A low thermal expansion metal piece with a coefficient of thermal expansion of C or more is gQXl
The color picture tube according to claim 1, characterized in that the color picture tube has a thermal expansion coefficient of: o/l:: (3)! Claim 1, characterized in that the soufflée is iron, the central elastic metal piece is stainless steel 8T111631, the high heat m1ll image metal piece is stainless steel BT:1B502, and the low thermal expansion metal piece is amber. The color picture tube according to item 1. (4) The color picture tube according to claim 1, wherein each metal piece is locally joined. (5) Low heat** Metal pieces mutually t: 1llk 11gk
, the receiving tube according to item 1 of the patent claim, characterized in that it is made of two types of metals with different coefficients. (6) The color picture tube according to claim 1, characterized in that the coefficient of thermal expansion of the central elastic metal piece is between the coefficient of thermal expansion of the panel bottle and the coefficient of island** of the mask frame. ()) The color picture tube according to claim 3, characterized in that 1 of the umber is less than 1 of all the 1 of the black mask support structure.