JPH02213026A - Manufacture of color cathode-ray tube - Google Patents

Abstract

PURPOSE:To prevent falling of an engaging stopper so as to improve working efficiency in assembling a combination of a panel and a mask by having the engaging piece held by a clip, which is stopped in engagement with the panel so as to fix the engaging piece. CONSTITUTION:An engaging piece 12 to be welded to an elastic support body 7a in which a loose fitting hole 11 that loosely fits to a stud pin 9 is provided on the loose edge, is held by a clip 22 and is fixed. When a shadow mask 4 is tentatively supported, it can be prevented from falling even if a panel 1 is moved or the shadow mask 4, etc., contacts the engaging piece 12. Working efficiency in assembling a combination of a panel and a mask can thus be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing a color cathode ray tube, and more particularly to a method for manufacturing a color cathode ray tube by improving a method for assembling a panel-mask combination.

(Prior Art) In general, a shadow mask type color cathode ray tube is a substantially rectangular panel that is joined together as shown in FIG.
1) and a funnel-shaped funnel (2), and a phosphor screen (3) consisting of a three-color phosphor layer is formed on the inner surface of the panel (1). A substantially rectangular shadow mask (4) is mounted on the inside thereof, facing each other and spaced apart from each other by a predetermined distance. This shadow mask (4) has a mask body (5) in which a large number of electron beam passing holes are formed.
) and a mask frame (6) that supports the peripheral portion thereof, and as shown in FIGS. 8 to 10, approximately U-shaped elastic supports ( 7) and stud pins (9) which are implanted on the inner surface of the four corners of the skirt portion of the panel (1) and into which the sliding holes (8) provided at the free ends of each of the elastic supports (7) are fitted. ) is supported inside the panel (1) by a mask support means consisting of.

To manufacture a color cathode ray tube, a panel-mask combination is assembled by welding the elastic support (7) to the mask frame (6) of the shadow mask (4), and the panel of the panel-mask combination and the shadow mask are assembled together. As a set, a phosphor screen (3) is formed on the inner surface of a panel (1), and then various steps such as joining the panel and funnel, enclosing an electron gun, and exhausting are performed.

By the way, if all the elastic supports (A) supporting the shadow mask (4) are slidably fitted to the stud pins (9) as described above, in addition to assembly errors when assembling the panel-mask combination, , the positional deviation during the repeated attachment and detachment of the shadow mask in the phosphor screen forming process is added, and the three-color phosphor layer and shadow mask (which make up the phosphor screen (3)) are
4) is misaligned, leading to deterioration of color purity.

Therefore, when assembling the panel-mask combination, at least one of the elastic supports welded to the mask frame is inserted into the loose fitting hole (11) that loosely fits into the stud pin (9) as shown in FIG. provided elastic support (7a)
In addition to this elastic support (7a), a stud pin (
After slidingly fitting the locking piece (12) provided with a sliding hole to be fitted to the stud pin (8), the elastic support body (7) is slidably fitted to the stud pin (8).
) and (7a), the attached shadow mask is temporarily supported on the panel <1), the distance between the panel (i) and the shadow mask is adjusted, and the elastic support (7a) and the locking piece (12) are adjusted.
) to assemble the panel-mask combination.

According to this method, it is possible to not only reduce the assembly error of the panel-mask combination, but also to reduce the positional deviation caused by the repeated attachment and detachment of the shadow mask in the subsequent phosphor screen forming process. Color purity deterioration can be prevented. However, in the method for assembling the panel-mask combination described above, the shadow mask (4) is attached to the panel (1).
), the locking piece (12) is only locked by sliding engagement with the stud pin (8), that is, contact resistance with the stud pin (8), so the shadow mask (4 ), the panel (1) may move or the shadow mask (4) may come into contact with it and fall off from the stud pin (8).

(Problems to be Solved by the Invention) As mentioned above, for color cathode ray tubes, it is possible to reduce assembly errors when assembling a panel-mask combination,
In addition, in order to reduce the positional shift of the shadow mask that is repeatedly attached and detached in the subsequent manufacturing process, a loose fitting hole is provided for loosely fitting at least one of the plurality of elastic supports attached to the mask frame into the stud pin. In some cases, a shadow mask is supported by welding an elastic support to a locking piece that slides onto a stud pin. However, in the conventional method of assembling a panel-mask combination, the locking piece is locked only by contact resistance with the stud pin, and then an elastic support that slides onto the stud pin and a loose fitting hole are provided. Since this is a method of temporarily supporting and assembling the shadow mask to which the elastic support is attached,
The panel may move when temporarily supporting the shadow mask,
Alternatively, the locking piece may fall off due to contact with a shadow mask, etc., resulting in poor workability.

The present invention was made to solve the above-mentioned problems, and provides a panel-mask combination using at least one elastic support that loosely fits into the stud pin and a locking piece that slides onto the stud pin. An object of the present invention is to prevent a locking piece from falling off when assembling a panel-mask combination, thereby improving workability when assembling a panel-mask combination.

[Structure of the Invention] (Means for Solving the Problems) A first elastic support body that slides onto a stud pin embedded in a panel of a mask frame of a shadow mask, and at least one elastic support body that fits loosely into the stud pin. The first elastic support welded to the shadow mask is welded to the first elastic support, and the second elastic support is welded to the stud pin. At the same time, the shadow mask is temporarily supported by slidingly fitting the second elastic support into the stud pin to which the engagement piece has been slid, and welding the second elastic support and the engagement piece. In the method for manufacturing a color cathode ray tube in which a panel-mask combination is assembled using a clip, the engaging piece is held in a clip, and the clip is engaged with the panel to fix the engaging piece.

(Function) When the engaging piece is held in the clip as described above, and the clip is locked to the panel, and the engaging piece is slidably supported on the stud pin, the spring and the loop are used to temporarily support the shadow mask. Even if it moves or the shadow mask etc. comes into contact with it,
It is possible to prevent the engagement piece from falling off.

(Example) Hereinafter, the present invention will be described based on an example with reference to the drawings.

First, a rectangular shadow mask (4) is manufactured by welding a mask frame having a cross-sectional shape to the periphery of a spherical mask body in which a large number of electron beam passage holes are formed. Next, as shown in FIG. 1, the rectangular shadow mask (4) is fitted with sliding holes (8) on the outer surface of the three corners of the mask frame (8) that are fitted with stud pins planted in the panel.
) is provided at the free end of the almost U-shaped elastic support (A)
At the same time, weld a roughly U-shaped elastic support (7a) with a loose fitting hole (11) provided at the free end to fit a stud pin implanted on the outer surface of the other corner. do. The elastic supports (7) and (7a) are installed by measuring the position coordinates of the four stud pins installed on the inner surface of the panel to be combined with the shadow mask (4) using a measuring device. It is installed based on the position coordinates.

Next, as shown in FIG. 4, one end of the main body (20) and the tongue (21) of a clip (22) made of an elastic body with a tongue (21) attached inside one end of the U-shaped main body (20). ) is inserted and held between the clip (22) and the stud pin, and the engaging piece (12) held by the clip (22) is inserted into the second As shown in the figure, the elastic support is slidably fitted onto the loosely fitted stud pin (9), and the other end of the main body (20) of the clip (22) is connected to the panel (
1) to fix the engaging piece (12).

Next, as shown in FIG. 3, a distance measuring device (23) is installed on the inner surface of the panel (1) to which the engaging piece (12) is fixed, and then the elastic support is placed on the panel (1). Body (7
) and (7a) attached shadow mask (4)
and slide each elastic support (7) onto the corresponding stud pin (9), and insert the elastic support (7a) into the stud pin (9) with which the engagement piece (12) is slid. loosely fit to temporarily support the shadow mask (4). Thereafter, the clip (22) is removed, the elastic support (7a) and the engagement piece (12) are brought into close contact, and the distance measuring device (23) is brought into close contact with the engagement piece (12).
) to adjust the distance between the inner surface of the panel (1) and the shadow mask (4), and then connect the elastic support (7a) and the engagement piece (12).
Weld with.

Therefore, as mentioned above, there is a stud pin (9) at the free end.
An elastic support (7) provided with a loose fit hole (11) that loosely fits into the
If the engaging piece (12) to be welded to a) is held and fixed by the clip (22), the panel (1) may move or the shadow mask (4) may move when temporarily supporting the shadow mask (4). Even if the engagement piece (12) comes into contact with the engagement piece (12), it can be prevented from falling off, and workability when assembling the panel-mask combination can be improved. Moreover, the elastic support body (7
Since it can be welded to a), the positional shift can be further reduced even when the shadow mask (4) is repeatedly attached and detached in the subsequent phosphor screen forming process, and a color cathode ray tube with good color purity can be obtained. can.

As shown in FIG. 5, for example, a protrusion (25) is provided on the tongue piece (21) as a clip for holding the engaging piece when making the above-mentioned panel-mask combination.
As shown in the figure, a groove (25) may be formed in the engagement piece (12), and the protrusion (25) may be fitted into the groove (25) to hold the engagement piece (12). With such a holding structure, the tongue piece (21) can be held more firmly than in the embodiment described above, and the engaging piece can be made more difficult to fall off when temporarily supporting the shadow mask.

In addition, in the above embodiment, the case where there is one elastic support body that loosely fits into the stud pin is described, but the present invention can also be applied to the case where there is one or more elastic support bodies that loosely fit on the stud pin. .

[Effects of the Invention] A shadow in which a first elastic support that slides on the stud pin and at least one second elastic support that loosely fits on the stud pin are attached to a panel on which an engagement piece is slid on the stud pin. When the mask is temporarily supported and the second elastic support body and the engaging piece are welded, the engaging piece is held and fixed to the clip, and when the clip is locked to the panel, the shadow mask is temporarily supported. Even if the panel moves or comes into contact with a shadow mask or the like when doing so, the engagement piece can be prevented from falling off, and workability when assembling the panel-mask combination can be improved.

Moreover, since the engagement piece can be welded to the second elastic support with the stud pin properly slidably fitted, it is much easier to attach and detach the shadow mask repeatedly during the phosphor screen forming process after the panel-mask combination. Positional deviation can be reduced, and a color cathode ray tube with good color purity can be obtained.

[Brief explanation of the drawing]

1 to 6 are detailed explanatory diagrams of the present invention, FIG. 1 is an explanatory diagram of the installation process of the first and second elastic supports in one embodiment, and FIG. FIG. 3 is an explanatory diagram of the process of temporarily supporting the shadow mask and welding it to the engaging piece. FIG. 4 is a perspective view showing the structure of the clip that fixes the engaging piece to the panel. , FIG. 5 is a diagram showing the structure of another clip, and FIGS. 8 (a,) and (b) are a plan view and a sectional view taken along the line Vl-Vl of an engaging piece used in combination with the clip shown in FIG. 5. , Fig. 7 is a partially cutaway diagram showing the structure of a color cathode ray tube, Fig. 8 is a diagram showing the combination structure of a conventional spring-lumen massmer, Fig. 9 is a diagram showing the structure of the attachment of the elastic support, and Fig. 1θ. 11 is a diagram showing a shadow mask support structure of an elastic support body that slides on a stud pin, and FIG. 11 is an explanatory diagram of a method of assembling a spring-mass assembly with an elastic support body that loosely fits on a stud pin. 1... Panel 4... Shadow mask L
...Mask frame 7...Elastic support (first elastic support) 7a...Elastic support (second elastic support) 8...Slip hole
9... Stud pin 11... Loose fitting hole 1
2...Engaging piece 22...Clip 111Representative Patent attorney Norifu Ogo No. 3Figure 12~: Figure Figure Figure Figure Figure

Claims (1)

[Claims] A first elastic support member formed with a slip-fitting hole that slides into a stud pin embedded in a panel of the mask frame of the shadow mask, and at least one first elastic support member formed with a loose-fitting hole that fits into the stud pin with a loose fit. a step of welding a plurality of elastic supports made of two elastic supports, and holding in a clip an engagement piece in which a sliding hole is formed for slidingly fitting a stud pin into which the second elastic support is loosely fitted; a step of locking the clip to the panel and slidingly fitting the engagement piece to a stud pin into which the second elastic support member is loosely fitted; and a first elastic member welded to the shadow mask to the stud pin of the panel temporarily supporting the shadow mask on the panel by slidingly fitting the supports and loosely fitting a second elastic support welded to the shadow mask onto the slidingly fitted stud pins of the engagement piece; By temporarily supporting the shadow mask, the distance between the opposing inner surface of the panel and the shadow mask is adjusted, and the engagement piece that is slidably fitted on the stud pin and the second elastic support body that is loosely fitted on the stud pin are adjusted. 1. A method of manufacturing a color cathode ray tube, comprising assembling a panel-mask combination by a welding process.