JPH03102741A - Method and device for sealing electron gun into cathode-ray tube - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for encapsulating an electron gun in a cathode cotton tube and an apparatus for encapsulating an electron gun.

[Summary of the Invention] The present invention relates to a cathode ray tube electron encapsulation method and an electron gun encapsulation device, and the present invention relates to an electron encapsulation method and an electron gun encapsulation device for a cathode ray tube. When enclosing the electron beam in a non-flare type neck which does not have a flared end at the open end of the electron gun, a guide having a substantially truncated conical surface is disposed at the open end of the neck on the electron gun insertion side, and the electron beam passes through the guide. The tip of the electron gun is inserted into the neck part while pressing the spring inward, and then the guide part is moved from the open end of the neck part to another position so that the terminal pin provided at the base of the electron gun penetrates. The arranged stem is fused to the open end surface of the neck portion to encapsulate the electron gun. Furthermore, when the electron gun encapsulation device according to the present invention is encapsulated in the neck portion of the electron gun, the outer periphery of the non-flare neck portion of the cathode ray tube is sandwiched from the outside, and the electron gun is slid along the neck portion. An electronic device comprising a pair of movable clamping parts, and each clamping part is provided with a guide part having an approximately truncated conical guide surface as a whole with the clamping parts abutting against the outer peripheral surface of the electron gun. To enable a gun enclosing device to smoothly insert an electron gun having a spring into a non-flare type neck part without causing damage.

? BACKGROUND ART In cathode ray tubes used in various displays and display devices including television picture tubes, an electron gun (2) is located within the neck portion (1n) of the cathode ray tube body, as shown in Fig. 1. It is housed concentrically with the section (1n). This electron gun (2) is, for example, red. The cathodes K, , K2, K, which take out electron beams corresponding to each color of green and blue, are arranged, for example, in a straight line when viewed from the front fluorescent screen (not shown) facing the electron gun; 1st grid G in common
2nd grid G2 + 3rd grid G 31 4th grid G41 5th grid G
An invergence means C is arranged.

The electron gun (2) with such a structure has a plurality of, for example, four, tongue-shaped springs (3) at its tip.
is arranged ↓ centered on the axis of the electron gun (2), and its free end is located in the funnel part of the tube body (1).
The spring (3) causes the electron gun (2) to abut against the inner conductive film (4) to which high electrons (anode voltage) are applied. )
The high voltage (anode voltage) applied to the internal conductive film (4) is connected to the fifth grid G of the electron gun (2) and to the lead (5). ) to the connected third grid G3.

On the other hand, on the base side of the electron gun (2), a neck portion (i
A stem (6) is provided to be fused to the open end (lna) of the terminal pin (lna), and a terminal pin (
7) Each electrode of the spirit gun (2), for example, the cathode K, , K2
, K. , the first grid Cz l + the second grid G2 and the cathode K. ,K,,K. Each I
Each terminal pin (7) is connected with J-do (5).
A predetermined power is supplied from the stem, and the electron gun (2) is mechanically held on the stem.

When enclosing the electron gun (2) in the neck of a cathode ray tube with such a configuration, the neck (1n) is usually placed on the open end side of the neck (In) as shown in FIG. A flared portion (If) having an inner diameter that gradually becomes larger toward the tip than the inner diameter at the center is provided, and the electron gun (2), which is pre-installed on the stem (6), is inserted into this large-diameter flared portion (If).
f), the electron gun (2) is inserted into the small diameter neck (In) despite the fact that the electron gun (2) is provided with a spring (3) that biases outward.
2) can be easily and smoothly enclosed without damaging the neck part, and with at least the tip of the electron gun (2) having the spring (3) inserted into the neck part, The flare part (if) is connected to the neck part (I
Cut the cylindrical part of (n) at the position shown by the chain line a, and attach the stem (6) to the open end (lna) created by this cutting.
By fusing them together, as shown in FIG. 1, a desired cathode lii tube in which an electron gun (2) is placed and sealed at a predetermined position within the neck portion (In) is obtained.

However, by providing the flared portion (if) in advance at the neck portion in this way, the loss of material does not become large, and the flared portion (If) can be cut well without causing cracks or the like. There is a problem that the work is complicated, and that there is a risk that glass dust will be scattered during cutting, causing inconveniences such as the production of defective products. In the case of a so-called non-flare type neck that does not have a flared part (1f), insert an opening end of the same diameter into the small neck part (1n), and in a free state, the tip of the neck part is inserted outward from this. It is extremely troublesome to insert the spring (3) located in the neck (In) into the neck (In) without damaging the open end of the neck (In) and without damaging the electron gun (2). .

In addition, an electron gun (2
), for example, there is a proposal for a sealing device disclosed in Japanese Utility Model Publication No. 62-4998. However, in this case, the guide ring must be fitted into the spring one by one, inserted into the neck of the electron gun, and then dropped and removed. The fitting operation is extremely complicated, and problems arise in terms of mass production, such as the difficulty of handling the minute guide rings.

[Problem to be solved by the invention]

In the present invention, when enclosing an electron gun into a cathode ray tube, it is possible to automatically encapsulate the electron gun in a cathode ray tube with a simple structure and operation without generating glass fragments, etc., and without causing material loss due to flare. To provide an electron gun enclosing method and an electron gun enclosing device for a cathode ray tube, which enable the electron gun to be reliably inserted into a non-flare neck part.

[Means for Solving the Problems] In the present invention, as shown in FIG. 1, an electron gun (2) equipped with a spring (3) having a biasing force expanding outward
The opening end of the cathode ray tube body (1) on the side where the electron gun (2) is inserted has a non-flare neck portion (
In), the opening end (lna) of the neck part (1n) on the insertion side of the electron gun (2) has a substantially truncated conical surface as shown by the broken line in FIG. guide(
11), and by passing through the guide (1l), the electron gun (2) is guided by pressing the plurality of springs (3) toward their respective axes, that is, inwardly, and the tip of the electron gun is connected to the neck part. (In), the step of bringing this guide (11) to another position, and the step of inserting the guide (11) into the electron gun (2).
electrons into the cathode ray tube body (1). Carry out gun encapsulation.

Further, the above-mentioned electron gun (2) enclosure device is shown in FIG. 3 in a top view, FIG. 4 in a side view, FIG. As shown in the cross-sectional view taken along the line AA in the figure, the outer periphery of the non-flare neck part (In) of the cathode ray tube tube body (1) is sandwiched from the outside and is slidable along this neck part (In). It has a pair of clamping parts (214) and (21B), each of which has a neck part (218) and (2111).
Corresponding to the opening end (lna) on the electron gun insertion side of In),
A heavy child gun insertion guide section is provided, and these guide sections (II
The inner guide surface of A) and (IIB) is connected to the clamping part (21A
) and (21B) sandwich the neck part (1n), and the opening end (lna) of the neck part (In) as a whole.
) is formed into a substantially truncated conical surface that widens outward from a position having an inner diameter corresponding to the inner diameter of. Here, the term "substantially truncated conical surface" is used not only when the inner circumferential guide surfaces of the guide portions (IIA) and (IIB) form a complete truncated conical surface as a whole, but also when the truncated conical surface is formed as a complete truncated conical surface. It refers to a truncated conical surface at the abutting portion with the spring (3) even if a portion is missing in the circumferential direction.

[Effect]

According to the method and apparatus of the present invention described above, the guy F section (1l)
The guide (1) is inserted by inserting the electron gun (2) into the guide (11) from the tip so as to face the open end (lna) of the neck (1n) of the tube body (1).
Since the spring (3) of the electron gun (2) is pressed inward by 1), it is smoothly guided and inserted into the neck (in) of the non-flare type, and after this insertion, This clamping part (21^) and (21B
) to another part, so for example, by automatically moving this, the stem (6) of the electron gun (2)
) can be sealed without causing any hindrance to welding to the open end (lna) of the neck (In). Therefore, the neck part (ln
) problems such as material loss caused by providing flares, the cumbersome work of cutting flares, and the generation of defective products due to glass dust, etc., are solved.
For example, you can automatically remove the neck part of an electron gun (In) with a simple operation.
It is possible to reliably enclose the material inside the container.

〔Example〕

An example of an electron gun insertion method using the electron gun enclosing device of the present invention will be described.

As shown in FIGS. 3 to 6, in the present invention, a pair of clamping parts (21A) and (21
B) is established and it is intimidating. These holding parts (21A) and (
21B) is a pair of movable bodies (23^) that are able to move in the Y direction in the figure where they are spaced apart from each other and close to each other.
and (23B). In addition, these holding parts (21
^) and (21B) have recesses each having a cylindrical surface with a semicircular or arcuate cross section and a curvature corresponding to the +lb ratio of the outer periphery of the neck (In) of the tube body (1). (22A) and (22B) are arranged facing each other. In the figure, two types of neck parts (ln) with different pipe diameters are shown.
Two pairs of recesses with different curvatures (
22A) and (22B) are provided. In addition, each recess (2) of each of these holding parts (21A) and (21B)
As shown in FIG. 6, guide portions (IIA) and (IIB) are provided below 2A) and (23B). These guide parts (IIA) and (IIB) face the end surface (lna) of the neck part (In) with the end of the neck part (1n) being sandwiched between the holding parts (21^) and (21B). ,
and a conical taper surface whose inner diameter increases from the inner diameter corresponding to the inner diameter of the neck portion (in) toward the side opposite to the neck portion (in) (downward in FIG. 6) and forms a truncated conical surface as a whole. It has an inner circumferential surface of.

The clamping parts (21^) and (21B) having these guide parts (IIA) and (11B) respectively attach these moving bodies (23A) and (23B) to the pair of moving bodies (23A) and (23B).
Regarding the Y direction of the moving direction of A) and (23B), it is possible to move together with these moving bodies (23A) and (23B). Regarding the X direction along the placement surface, the mounting members (25) are arranged via springs (24) so as to be able to move elastically to some extent in the Z axis direction perpendicular to the X and Y axis directions. iI is movably connected to. As described above, as a mechanism for shifting in the Z-axis direction, for example, a guide rail (26) extending in the Z-axis direction is provided at the end of the holding portions (21A) and (21B) and each mounting member (25). A mating slider (27) is provided so that the slider can be moved by sliding between the two.

Both moving bodies (23A) and (23B) are connected to one moving body (
23^) along the Y-axis direction is inserted into a bearing (29), such as a bearing mechanism, provided on the other movable body (23B) so that the guide rods (28) are mutually attached in the Y-axis direction. Both moving bodies (23A) and (23B) are made slidable so that they can move relatively along the Y-axis direction.

Also, between the two moving bodies (23A) and (23B), a first moving drive means (3l) consisting of, for example, an air cylinder is arranged so that the moving direction of its piston (31I') is along the Y-axis. Piston (31P) and cylinder (31
C) are mechanically connected to the movable bodies (23A) and (23B), respectively, and the movable bodies (23A) and (23B) are driven by the first moving drive means (3l) by this air cylinder.
23B) can be moved relative to each other on the Y axis.

In addition, these movable bodies (23A) and (23B) are not only made movable relative to each other in the Y-axis direction as described above, but also as a whole, for example, in the X-axis direction and the Z-axis direction, respectively. It can be moved by second and third movement drive means (32) and (33) consisting of.

This second movement driving means (32) is arranged on a base (30) that can move in the Z-axis direction, and this convex table (30)
The movement drive means (33) causes movement in the Z-axis direction.

An electron gun enclosure arrangement having such a configuration is actually provided as mass production equipment, and for example, 11 to 18 cathode ray tube bodies (1) are arranged on a turntable,
This is index-rotated and brought to a predetermined stopping position, and the neck part (ln) of the cathode cotton tube body (1) brought to the predetermined position is held at its clamping part ) and (21B) in the Y-axis direction, that is, supported by the drive of the first movement drive means (31), and the cathode cotton tube (1) is moved within a predetermined pair of four parts (22A) and (22B). The neck portion (In) of the two is sandwiched. In this case, the clamping part (21^) and (2
1B) respectively have third and second moving drive means (32
) and (33), the cathode ray tube is brought to a predetermined position by the drive of the first moving drive means (3l), and is placed in the above-mentioned predetermined position, for example, in the recess (22A) of one of the clamping parts (21A). When this is stopped by abutting against the outer periphery of the end of the neck part (in) of the tube body (1), it then moves toward the other clamping part (21B) or clamping part (21A), and the corresponding The concave part (22B) is the neck part (
Both clamping parts (21^) abut against the outer peripheral surface on the opposite side of 1n)
and (21B) to sandwich the neck portion (1n).

At this time, there is a gap between the end face of the opening end (lna) of the neck part (In) and the edge of the small diameter part side of the guide part (l1), for example, taking into account the error in the shape and size of the neck part (1n). 2
A gap g of about n+a+ is created, and in this state, the electron gun (2) is guided toward the neck (in).
1) is inserted along the inner circumferential surface. At this time, when the spring (3) abuts against the inner peripheral surface of the guide (1l), the electron gun (2) is lifted and the guide (
11) L Therefore, the clamping parts (21A) and (21B) move the guide rail (26) and slider (27) in the Y-axis direction.
) and its guide (11
) abuts against the open end (lna) of the tube (1) to eliminate the gap g. In this state, the electron gun (2) is further lifted and smoothly inserted into the neck (1n). Then, with the tip of the electron gun (2) inserted up to a predetermined position in the neck (in) of the cathode ray tube tube (1), the holding parts (21^) and (21B) move to the lth moving drive. It is opened under the control of the means (31), and is further moved to the position where the neck part (1n) of the other cathode ray tube body is disposed by the second and third swing driving means (32) and (33). . On the other hand, the electron gun (2), which has been evacuated to some extent within the neck part (In), is located between the clamping part (21A) and (
21B), its stem (6) is further lifted to a position where it has a small gap with the open end (lna) of the neck (In) of the tube body (11), and in this state, the parna is brought from the outer periphery. The stem (6) and the open end (lna) are fused to form the neck (I) of the tube body (1) of the electron gun (2).
n) Encapsulation within.

In this way, the neck part (in) of the cathode ray tube body (1) is
The tip-off tube (34) has the thunder gun (2) sealed therein and the exhaust inside the tube body (1) passes through the stem (6).
), and then the tip-off tube (34) is sealed to construct the intended cathode ray tube as explained in FIG.

Further, the electron gun (2) sealed in the neck part (1n) of the tube body (1) in this way has its spring (3) connected to the internal conductive film (4) disposed in the funnel part of the tube body (1). )
The main sub-gun (2) is held on the axis of the neck (In) by cooperation with the stem (6).

〔Effect of the invention〕

-1 As mentioned above, in the present invention, when an electron gun is enclosed in the neck part (1n) of a non-flare type cathode ray tube body, a guide (11) corresponding to the flare is provided, so to speak. Since the electron gun (2) is inserted through this, the spring (3) is connected to the neck part (
Inconveniences such as colliding with the open end (lna) of in) and damaging it or bending the spring (3) are avoided. As a result, the spring (3) is moved while the electron gun (2) is housed in the neck (1n) of the cathode ray tube tube (1).
Defective products such as poor contact with the internal conductive film (4) due to shape change, making it impossible to stably hold the electron gun (2) in the specified position within the neck part (1n), or causing poor power supply. It is possible to reduce the occurrence rate and improve reliability.

In addition, in the device of the present invention, the guide portion (11) is provided in the pair of clamping portions (21A) and (21B) so that they are spaced apart from each other. It is possible to automate the arrangement of so-called dummy flares, and this brings about great practical and industrial benefits, such as making it possible to encapsulate an electron gun in a cathode ray tube with excellent heritage.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of a main part of an example of a cathode ray tube to which the present invention is applied, FIG. 2 is a diagram for explaining a method of encapsulating an electron gun in a cathode ray tube according to the present invention, and FIG. 3 is a diagram according to the present invention. 4 is a side view of an example of an electron gun enclosure device for a cathode ray tube, FIG. 5 is a corresponding top view of a portion of the device in use, and FIG. A sectional view taken along the line A--A in FIG. 5, and FIG. 7 are explanatory diagrams of a conventional electron gun encapsulation method. (1) is the tube body, (1n) is the neck, (lna) is the open end, (2) is the electron gun, (3) is the spring, (6) is the stem, (7) is the terminal pin, (21A) and (21B)
(1l) is a guide, (31), (32) and (33) are first, second and third moving drive means.

Claims (1)

[Scope of Claims] 1. An electron gun equipped with a spring having a biasing force that spreads outward is placed in a non-flare neck portion that does not have a flared end at the open end on the insertion side of the electron gun of the cathode ray tube body. When inserting the electron gun, a guide having a substantially truncated conical surface is arranged at the open end of the neck portion on the insertion side of the electron gun, and the electron gun is passed through the guide while pressing the spring inwardly. a step of inserting the tip of the gun into the neck; a step of bringing the guide to another position; 1. A method for encapsulating an electron gun in a cathode ray tube, the method comprising the step of fusing an electron gun to a cathode ray tube. 2. A pair of clamping parts are arranged to sandwich the outer periphery of the non-flare neck part of the cathode ray tube from the outside and to be able to slide along the neck part, and each of these clamping parts has an electron gun attached to the neck part. An electron gun insertion guide section is provided corresponding to the opening end on the insertion side, and the inner circumferential guide surface of these guide sections corresponds to the inner diameter of the opening end of the neck section as a whole with the neck section being held between the clamping sections. An electron gun enclosure device for a cathode ray tube, characterized in that it has a substantially truncated conical surface expanding outward from an inner diameter.