JP2634363B2 - Anode cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anode cap for connecting a high-voltage power supply line to an anode of a cathode ray tube.

[0002]

2. Description of the Related Art A conventional anode cap is formed integrally with a bowl-shaped elastic insulator apex in an outer tangential direction at the top.
The terminal has a shape in which a cylindrical electric wire holding portion for holding a high voltage power supply line and a terminal piece is mounted therein, and a through hole reaching the terminal piece is provided inside a bowl-shaped apex of the elastic insulator. A connecting piece for connecting the piece and the anode of the cathode ray tube has one end connected to the terminal piece through the through hole, and the other end of the connecting piece protrudes a predetermined length inside the apex of the bowl-shaped elastic insulator. In addition, an engaging hook that engages with the anode of the cathode ray tube when the bowl-shaped elastic insulator is attached to the outside of the anode portion of the cathode ray tube is provided.

When the conventional anode cap is attached to the outside of the anode part of the cathode ray tube, the bowl-shaped elastic insulator is turned upside down, and the engaging hook of the connection piece is turned upside down. The engagement hook is engaged with the anode of the cathode ray tube so as to protrude outside the elastic insulator having the shape, and then the bowl-shaped elastic insulator is turned back. With this configuration, the connection piece presses the bowl-shaped elastic insulator against the cathode ray tube through the terminal piece to adhere to the cathode ray tube, and the opening of the bowl-shaped elastic insulator is expanded. It elastically adheres to the outside of the anode part of the cathode ray tube, and achieves the effects of holding, insulating and moisture-proof.

[0004]

However, in the above-mentioned structure of the prior art, the holding force is ensured by the connection piece, but there is a problem that the insulation and moisture proof effects are not sufficient.

If the pressing force of the connecting piece is insufficient, the portion of the cathode ray tube that is in close contact with the outside of the anode is only the tip of the inner surface of the bowl-shaped elastic insulating body. In addition, there is a problem in that the tip of the inner surface of the elastic insulating body in the shape of a bowl that is in close contact rises, and the insulation and moisture-proof effect are deteriorated.

When the pressing force of the connection piece is sufficient, the portion of the cathode ray tube which is in close contact with the outside of the anode portion is a wide portion inside from the tip of the inner surface of the bowl-shaped elastic insulating body. However, there is a problem in that the moisture that has entered the above-mentioned contact portion due to the capillary phenomenon reaches the electrode portion inside the contact portion, so that a current leaks from the anode, which induces corona and causes insulation deterioration. .

When the bowl-shaped elastic insulator is attached to the outside of the anode part of the cathode ray tube, if a part of the bowl-shaped elastic insulator is formed so as to rise from the outside of the anode part of the cathode ray tube over the entire circumference, it will be lifted. The inside of the
Combined with the pressing force of the connecting piece, it secures a strong holding force, absorbs the force applied by routing the high voltage power supply line, and does not transmit the routing force to the close contact on the outside, so the outside of the raised part This is convenient because the adhesion is stable and the moisture that has entered the outer contact portion due to the capillary action stops at the raised portion and does not enter the inner contact portion. However, in the bowl-shaped elastic insulator of the related art, the whole body has a curved surface that is convex outward. Therefore, when the bowl-shaped elastic insulator is attached to the outside of the anode part of the cathode ray tube, one of the bowl-shaped elastic insulators is formed. However, there is a problem that it is difficult to form such a shape that the portion rises from the outside of the anode portion of the cathode ray tube over the entire circumference.

[0008] It is an object of the present invention to solve the above-mentioned problems and to provide an anode cap in which the effects of insulation and moisture resistance are not deteriorated.

[0009]

In order to solve the above problems, the anode cap of the present invention has a bowl-shaped elastic insulator having a hollow conical shape, the thickness of which is thicker at the apex side and gradually increases toward the opening side. together formed to be thin, near its open end, it is spread facing away conical, have a refractive portion changing the direction slightly inward direction, against the cathode ray tube vacuum
When it is adsorbed using pressure,
And a gap is formed between the cathode ray tube and the gap.
Structure so that the outer and inner circumferences are in close contact with the cathode ray tube
It is characterized by having been done .

[0010]

According to the present invention, the bowl-shaped elastic insulator is formed into a hollow conical shape, so that the whole is formed into a curved surface obtained by bending a plane.
The above-mentioned floating refraction part is easily formed. The refracting portion has an outwardly convex shape, and when the hollow conical elastic insulator is pressed to the outside of the anode portion of the cathode ray tube, even if it is elastically deformed together with other portions, the outwardly convex portion is formed. So that it rises from the outside of the anode part of the cathode ray tube. In this case, since the refraction portion rises to form a gap, even if moisture enters the outer contact portion due to capillary action, the capillary phenomenon stops at the gap portion and does not enter the inner contact portion. .

The thickness of the hollow conical elastic insulator is
Use the vacuum pressure by pressing the anode cap against the cathode ray tube because it is thicker at the top and gradually thinner toward the opening
The thin part on the outer peripheral side reverses and warps
Can be prevented, the familiarity with the cathode ray tube is good,
Evenly and tightly close, shut off the outside air and protect the inside.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the anode cap of the present invention will be described with reference to FIGS.

In the present invention, unlike the conventional example, FIGS.
As shown in FIG. 1, a bowl-shaped elastic insulator is a hollow conical elastic insulator 1. The material of the hollow conical elastic insulator 1 is silicone rubber. At the apex of the hollow conical elastic insulator 1, the high-voltage power supply line 9 and its terminal piece 8 are formed integrally with the hollow conical elastic insulator 1 laterally from the apex as shown in FIG.
And a cylindrical electric wire holding portion 5 for holding the inside of the wire. Inside the apex of the hollow conical elastic insulator 1, there is a through hole 6 reaching the terminal piece 8, one end is connected to the terminal piece 8 through the through hole 6, and the other end is connected to the hollow conical elastic insulator 1. When the hollow conical elastic insulator 1 is attached to the other end outside the anode portion of the cathode ray tube 20, the engaging hook 10 engages with the anode 22 of the cathode ray tube 20. There is a connecting piece 7 provided with.

The thickness of the hollow conical elastic insulator 1 is thicker at the vertex side 4 and is gradually reduced toward the opening side 3. The conical resilient portion 1 has a refraction portion 2 whose entire outward extension extends slightly inward in the entire circumference near the open end of the hollow conical elastic insulator 1.

FIG. 4 is a sectional view showing a state in which the present embodiment is mounted on the anode part of a cathode ray tube. In the cathode ray tube 20, an anode conductive film 21 is provided inside a glass case 23, and the anode 22 is connected to the glass case. 23 and is connected to the anode conductive film 21. When the anode cap of this embodiment is attached to the outside of the anode 22, the hollow conical elastic insulator 1 is turned upside down in the opposite direction, and the engaging hook 1
0 is outside the inverted hollow conical elastic insulator 1, the engaging hook 10 is engaged with the anode 22 of the cathode ray tube 20, and then the inverted hollow conical elastic insulator 1 is removed. Put it back. As a result, as shown in FIG. 4, the connecting piece 7 presses the hollow conical elastic insulator 1 through the terminal piece 8 against the cathode ray tube 20 to firmly adhere to it, and the hollow conical The opening of the elastic insulator 1 is expanded and pressed at the apex side 4 against the outside of the anode part of the cathode ray tube 20 by the pressing force of the connection piece 7,
An inner contact portion B which is in close contact with the cathode ray tube 20 is formed, and elastically and firmly adheres to achieve the effect of holding, insulating and moisture-proof.

In this case, the outwardly convex refracting portion 2 maintains the outwardly convex shape even if it is spread with other portions of the opening portion of the hollow conical elastic insulator 1. Therefore, a gap A that is raised from the glass case 23 of the cathode ray tube 20 is formed. The opening 3 on the outer side of the bent portion 2 is in close contact with the glass case 23 of the cathode ray tube 20 by its elastic force to form an outer contact portion C. The outer contact portion C has a thinner portion on the opening side 3 and is gradually thinner toward the opening end side, so that the outer contact portion C tightly and uniformly adheres.

In this way, when the high-voltage power supply line 9 is routed, the holding force against the routing force is reduced by the inner contact portion B.
, And the outer contact portion C is not affected by the pulling force, and the outer contact portion C is uniformly and tightly adhered, so that the inside is sufficiently protected.

Further, even if moisture enters the outer contact portion C by capillary action, the capillary action stops at the gap A,
It does not enter the inner contact portion B.

[0019]

The anode cap of the present invention has a refracting portion near the open end of the hollow conical elastic insulator, the outwardly expanding portion of the conical shape slightly reversing the inward direction. However, it floats up from the glass case of the cathode ray tube around the entire circumference of the hollow conical elastic insulator to form a gap, which separates the contact portion from the inner contact portion and the outer contact portion, and the inner contact portion has a holding force. Therefore, even if moisture enters the outer contact portion by capillary action, the capillary action stops in the gap, so that the effect of insulating and moisture-proof can be stabilized.

Further, since the outer contact portion is thinner and gradually thinner toward the opening end side, the outer contact portion is tightly and uniformly adhered to sufficiently protect the inside.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of the anode cap of the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a partial sectional side view of FIG. 1;

FIG. 4 is a sectional view of the embodiment of FIG. 1 in use;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow conical elastic insulator 2 Refraction part 3 Opening side 4 Apex side 5 Cylindrical electric wire holding part 6 Through hole 7 Connection piece 8 Terminal piece 9 High voltage power supply line 10 Engagement hook 20 Cathode ray tube 21 Anode conductive film 22 Anode 23 Glass Case A Void B Inside contact C Outside contact

Claims (1)

(57) [Claims] 1. A bowl-shaped elastic insulator having a hollow conical shape,
With its thickness is formed to gradually decrease toward the thick opening side at the apex side, near the open end, spreads facing away conical, have a refractive portion changing the direction slightly in the direction Is pressed against the cathode ray tube and absorbed using vacuum pressure.
Between the cathode ray tube inside the refraction section
A void portion is formed in the outer peripheral portion and the inner peripheral portion of the void portion.
An anode cap, characterized in that the anode cap is configured to be in close contact with the cathode ray tube .