JPH01311544A - Color cathode-ray tube device - Google Patents

Abstract

PURPOSE:To prevent mis-convergence from occurring by constituting so that a deflection device is held to have a space between itself and a cathode-ray tube, and a phosphor side end is made of an insulating, nonmagnetic solidified body and secured to a surrounding part of the cathode-ray tube via a stress absorbing body. CONSTITUTION:A deflection device 3 is held to hale a space 13 between itself and a cathode-ray tube 2. The phosphor side end of the deflection device 8 is made of silicon resin and secured to the cathode-ray tube 2 by means of an attachment body 14 of insulating, non-magnetic property. The attachment body 14 is glued to the circumference of a surrounding part 4 of the cathode-ray tube 2 and at the same time is glued to the end circumference on the phosphor 6 side of the deflection device 3 so that the deflection device 3 is firmly secured to the cathode-ray tube 2. Further, a stress absorbing section 15 is provided to relax thermal stresses caused by heat generated during the functioning of the cathode-ray tube 2. Displacement of the deflection device due to external forces and thermal stresses caused by the heat from the cathode-ray tube is prevented. As a result, misconvergence on the periphery of the picture screen is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a color cathode ray tube device, and particularly relates to the structure of attaching a deflection device to a cathode ray tube.

(Prior Art) A cathode ray tube device consists of an electron gun that emits an electron beam and a phosphor layer that emits red, green, and blue colors.
A cathode ray tube has a phosphor screen that projects an image using the electron beam, a shadow mask placed close to the phosphor screen, and a cathode ray tube that is fixed to the envelope of the cathode ray tube and that emits an electron beam from an electron gun. It consists of a deflection device that deflects the electron beam so as to scan the fluorescent screen. When this deflection device is attached to a cathode ray tube, the deflection device must be aligned and fixed to the cathode ray tube envelope to avoid color shift on the phosphor screen and deterioration of screen quality. . When attaching this deflection device, a method is usually adopted in which a wedge is used to adjust the position of the deflection device on the cathode ray tube. That is, as shown in FIG. 6, first, the position of the cathode ray tube (61) in the tube axis direction is adjusted so that the electron beam transmitted through the shadow mask lands on a predetermined phosphor layer of the phosphor screen. Then, tighten one end of the electron gun side of the deflection device (62) with the ring (63) to secure the cathode ray tube (61).
of the envelope (64) at a predetermined position. Next, in order to achieve convergence over the entire surface of the phosphor screen, the other end of the deflection device (62) on the phosphor screen side is swung vertically and horizontally using a plurality of rubber wedges (65). )
After adjusting the inclination of the wedge (65) and the deflection device (
The deflection device (62) is fixed by bonding the other end of the deflection device (62) with a silicone resin (66). This wedge (6
Double-sided adhesive tape is attached to the surface in contact with the envelope (64) of 5), and this tape allows the wedge (65)
is fixed to the envelope (64).

By the way, in a cathode ray tube device in which the deflection device is fastened to the cathode ray tube using a ring and a wedge, the contact area between the wedge, the cathode ray tube, and the deflection device is very small, and it is difficult to firmly fix each other. Because of this, the cathode ray tube is vulnerable to impacts in the direction perpendicular to the axis of the tube and forces acting in a direction that twists the cathode ray tube and the deflection device, and when such forces act, the deflection device becomes misaligned. This causes misconvergence around the screen.

Furthermore, when a cathode ray tube device is used in an aircraft, ship, or mobile equipment, the cathode ray tube is potted into a shield case made of high magnetic permeability material for reasons such as shielding the earth's magnetism and mitigating external shocks. Although it is used as
In recent years, there has been a demand for smaller and lighter shield cases. In response to this request, as shown in FIG.
), this not only becomes an obstacle to miniaturization and weight reduction, but also causes misalignment of the deflection device, causing misconvergence around the screen.

In order to solve these problems, without using a wedge,
It has been proposed to fix the deflection device by filling the gap between the anode ray tube and the deflection device with a heat conductive member such as silicone resin (see Japanese Patent Laid-Open No. 62-252049).
. However, when the gap between the cathode ray tube and the deflection device is filled with silicone resin, the center axis of the deflection device whose position has been adjusted does not always align with the tube axis of the cathode ray tube, and the installation may be tilted. Therefore, the shape of the silicone resin cured between the cathode ray tube and the deflection device is not axially symmetrical with respect to the tube axis. For this reason, when the silicone resin thermally expands due to an increase in environmental temperature or heat generation from the cathode ray tube, the thermal stress that occurs does not work evenly between the cathode ray tube and the deflection device.
The deflection device is tilted, causing misconvergence around the screen.

(Problems to be Solved by the Invention) As described above, in conventional cathode ray tube devices, the end of the deflection device on the phosphor screen side is fixed to the cathode ray tube via a wedge, so it cannot be firmly fixed. There are problems in that the deflection device is easily misaligned due to external force, resulting in misconvergence around the screen, and furthermore, it is inconvenient to store it in a shield case, which hinders miniaturization and weight reduction.

The purpose of the invention is to be able to firmly fix the deflection device to the cathode ray tube without using a wedge, and to prevent the deflection device from shifting due to thermal stress caused by external force or heat from the cathode ray tube, thereby preventing misconvergence around the screen. The object of the present invention is to provide a cathode ray tube whose shield case can be made smaller and lighter without causing any problems.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides an electron gun disposed at one end of the envelope, a fluorescent light source disposed at the other end of the envelope facing the electron gun, a color cathode ray tube having a surface and a shadow mask disposed in close proximity to the phosphor screen; and external to the cathode ray tube, the electron beam from the electron gun can be deflected to scan the phosphor screen. In a color cathode ray tube device having a deflection device arranged at a position, the deflection device is held so as to have a space between the deflection device and an envelope of the cathode ray tube, and the phosphor screen of the deflection device is The side edge is insulating,
This color cathode ray tube device is made of a non-magnetic coagulant and is fixed to the envelope of the cathode ray tube by a mounting body having a stress absorbing portion.

The stress absorbing portion of the mounting body in the cathode ray tube device of the present invention is composed of a plurality of spaces provided in the mounting body.

This space can be created by removing the wedge after the deflection device and cathode ray tube are embedded in silicone resin together with a wedge that adjusts the inclination of the end of the deflection device on the phosphor screen side. In addition, the mounting body of the present invention is made of an insulating, non-magnetic coagulant, and has damper properties in terms of vibration characteristics. Therefore, it has a softness such that the deflection device does not move due to vibration, etc., for example, JIS hardness. It is preferable to have 30. Silicone resin can be used as this type of coagulant.

(Function) In the cathode ray tube device of the present invention, the deflection device is held so that there is a space between the deflection device and the cathode ray tube, and the end of the deflection device on the phosphor screen side is located between the deflection device and the cathode ray tube. Since it is fixed to the cathode ray tube by a mounting body that fills the gap, the contact area is large and the deflection device is firmly fixed, so that the deflection device does not shift due to external force, and misconvergence around the screen does not occur. Furthermore, since this mounting body is provided with a stress absorbing section, the thermal stress accompanying the thermal expansion of the mounting body due to heat from the cathode ray tube that occurs during operation is alleviated by this stress absorbing section, thereby preventing the deflection device from shifting. This eliminates the possibility of misconvergence around the screen.

(Example) Examples of the present invention will be described below. FIG. 1 is a sectional view of a cathode ray tube device illustrating an embodiment, and FIG. 2 is a sectional view taken along line A--A in FIG. 1. A cathode ray tube device (1) consists of a cathode ray tube (2) and a deflection device (3) fixed to the outside thereof.

The cathode ray tube (2) includes an electron gun (5) disposed at one end of the envelope (4), and an electron gun (5) disposed at the other end of the envelope (4) facing the electron gun (5). It has a phosphor screen (6) made of a phosphor layer that emits red, green, and blue colors, and a shadow mask (7) disposed close to the phosphor screen (6). The deflection device (3) also includes a plastic separator (8), a horizontal deflection coil (9) arranged inside the separator (8), and a plastic separator (8).
) and a vertical deflection coil (11) wound around a core (10). This deflection device (3) is fixed at one end on the electron gun side by a tightening ring (12). Further, the deflection device (3) is held so as to have a space (13) between the deflection device (3) and the cathode ray tube (2), and as shown in FIG. ) is made of silicone resin and is fixed to the cathode ray tube (2) by an insulating and non-magnetic mounting body (14). This mounting body (14) is glued around the envelope (4) of the cathode ray tube (2), and also around the end of the deflection device (3) on the phosphor screen (6) side. 3) firmly to the cathode ray tube (2), and then roughly
) has a stress absorbing part (15) for relieving thermal stress due to heat generated during operation.

In this cathode ray tube device (1), the deflection device (3) is attached to the cathode ray tube (2) as follows. As shown in Figure 3, after adjusting the position of the cathode ray tube (2) in the tube axis direction, one end of the deflection device (3) on the electron gun side is fixed with a tightening ring (12), and then , four wedges (16)
By temporarily fixing the phosphor screen (6) of the deflection device (3)
A cathode ray tube device (1) whose inclination is adjusted by swinging the other end up and down and left and right is attached to a cylinder jig (17). The wedge (16) used here is the mounting body (14)
For example, it is made of Teflon resin rubber such as PYTON, which does not adhere to the silicone resin that makes up the material, or it is coated with a release agent on the surface. The cylinder jig (17) is provided with a cylindrical main body (18) and one end of the main body (18), as shown in the front view in FIG. It consists of a rubber ring (19) that is in close contact with the envelope (4), and a spring piece (21) that is slidably attached to the other end of the main body (18) with a screw (20). These main body (18) and rubber ring (19) are made of a material that does not adhere to the silicone resin coagulant, or a material whose surface is coated with a release agent. This cylinder jig (
17) to the cathode ray tube device (1), use the screws (2
0), slide the spring piece (21), lock one end of it to the separator (8) of the deflection device (3), and tighten the screw ( 20) and secure it.

After the cylinder jig (17) is installed in this manner, a coagulant is poured into the cylinder jig (17) and hardened. After the coagulant has completely hardened, remove the cylinder jig (17), cut the hardened coagulant along the broken line in the figure to remove excess coagulant, and remove the wedge (16). , complete the installation of the deflection device. There is no particular problem when removing the wedge (16) because the wedge (16) is deformed. The wedge can also be removed by making a cut in the silicone resin above the wedge in the length direction of the wedge.

FIG. 5 is a sectional view showing a cathode ray tube device according to another embodiment of the present invention housed in a shield case. In this cathode ray tube device (31), the mounting body (34) for fixing the deflection device (33) to the cathode ray tube (32) has a larger space than the mounting body (4) shown in FIG. Since it has the absorption part (35), it is effective for large cathode ray tubes that generate a large amount of heat. As can be seen from FIG. 5, this cathode ray tube device (31) has a mounting body (
34) fixes the deflection device (33) to the cathode ray tube (32), making the shield case (34) smaller and lighter.
36) can be stored without any inconvenience.

[Effects of the Invention] As described above, according to the present invention, the deflection device can be firmly fixed to the cathode ray tube without using a wedge, and the deflection device can be firmly fixed to the cathode ray tube without using a wedge, and the deflection device can be fixed firmly to the cathode ray tube without using a wedge. It is possible to provide a cathode ray tube in which positional shift can be prevented, convergence around the screen does not occur, and the shield case can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a cathode ray tube device showing an embodiment of the present invention;
Figure 2 is a sectional view taken along the line A-A in Figure 1, Figure 3 is a sectional view illustrating the assembly of the cathode ray tube device of the embodiment, and Figure 4 is used for assembling the cathode ray tube device. 5 is a sectional view showing the cathode ray tube device of the embodiment housed in the shield case, FIG. 6 is a sectional view showing the conventional cathode ray tube device, and FIG. 7 is a sectional view showing the conventional cathode ray tube device. FIG. 2 is a cross-sectional view showing a conventional cathode ray tube device housed in a shield case. 1... cathode ray tube device, 2... cathode ray tube, 3...
... Deflection device, 5... Electron gun, 6... Fluorescent screen, 7... Shadow mask, 13...
・Space part, 14... Mounting body, 15...
Stress absorber. Agent Patent Attorney Norio Ogo No. 215ii1 Figure 3 @ 4 Figure 7

Claims (1)

[Claims] An electron gun disposed at one end of the envelope, a phosphor screen provided at the other end of the envelope facing the electron gun, and a collar having a shadow mask disposed close to the phosphor screen. A color cathode ray tube device comprising a cathode ray tube and a deflection device disposed outside the cathode ray tube at a position where the electron beam from the electron gun can be deflected so as to scan the phosphor screen, the deflection device is held in such a way that there is a space between the deflection device and the envelope of the cathode ray tube, and the end of the deflection device on the phosphor screen side is made of an insulating, non-magnetic coagulant and has a stress absorbing portion. 1. A color cathode ray tube device, characterized in that the device is fixed to an envelope of the cathode ray tube by a mounting body having a mounting body.