JPH0357148A - Leak preventing device - Google Patents

Abstract

PURPOSE:To prevent leak from an anode contact of a cathode-ray tube by installing a disc-shaped rubber part formed of silicone rubber between the anode contact as a high voltage applying terminal of the cathode-ray tube and an anode gap installed to supply a high voltage to this anode contact. CONSTITUTION:A leak preventing pad 5 is a disc-shaped sheet of silicone rubber and has an aperture at the center. When this leak preventing pad 5 is tightly applied to a cathode-ray tube surface around an anode contact 2 of a cathode- ray tube 4, the tightly applied part of the leak preventing pad 5 to the cathode- ray tube surface is electrically insulated from a high voltage, thereby if a high voltage is applied to the anode contact 2, leak from the outer circumference of leak preventing pad to the external can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a leak prevention device for a cathode ray tube of a television receiver.

Conventional Technology Generally, as a means to prevent leakage from the anode contact, which is a high voltage application terminal of a cathode ray tube, a silicon bond 3 is applied between the anode cap 1 and the cathode ray tube surface around the anode contact 2, as shown in FIG. death,
This prevents leakage from the anode contact 2. Here, 4 indicates a plum tube.

Problems to be Solved by the Invention However, with the method of applying a silicone bond as shown in Figure 3, it takes about 24 hours after the silicone bond is applied in a hard case, so it is difficult to remove the anode cap. The problem is that high pressure cannot be supplied to the cathode ray tube until about 24 hours after attachment, and once the anode cap is attached and hardened with silicone bond, it is difficult to remove the anode cap. There is.

SUMMARY OF THE INVENTION The present invention aims to provide a leak prevention device that can supply high pressure immediately after attaching an anode cap, and also allows easy attachment and detachment of the anode cap.

Means for Solving the Problems The leak prevention device according to the present invention uses a disk-shaped pad made of silicone rubber that can be easily installed and removed. The structure is such that they can be brought into close contact with each other as much as possible.

Function: According to the above structure, leakage from the anode contact of the cathode ray tube is prevented, high pressure can be supplied immediately after the anode cap is attached, and even after the anode cap is attached, it can be attached and removed as many times as needed. can be done easily.

EXAMPLE Hereinafter, an example of the present invention will be explained using FIGS. 1 and 2.

FIG. 1 is a sectional view of a cathode ray tube with a leak prevention pad 5 actually attached to the cathode ray tube 4. As shown in FIG. FIG. 2 shows the leak prevention pad of the present invention, which is a disk-shaped sheet made of silicone rubber and has an opening in the middle. As shown in FIG. 1, since the leak prevention pad 5 of the present invention is in close contact with the cathode ray tube surface around the anode contact 2 of the cathode ray tube 4, the contact area between the leak prevention pad 6 and the cathode ray tube surface has a high electrical withstand voltage. Since it is insulated, even if a high voltage is applied to the anode contact 2, leakage from the anode contact 2 to the outside of the periphery of the leak prevention pad can be prevented. Furthermore, the leak prevention (rubber) panod 5 can be removed from the cathode ray tube surface by removing the anode cap 1 etc., which greatly improves its maintenance and serviceability.

Effects of the Invention According to the present invention, it is possible to prevent leakage from the anode contact of a cathode ray tube, and high voltage can be applied immediately after attaching the anode cap.
Also, the anode cannob can be easily installed and removed any number of times.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of a leak prevention device according to the present invention, and FIG. 2 is a perspective view of a leak prevention pad according to the present invention.
FIG. 3 is a sectional view of a conventional cathode ray tube. 1... Anode cap, 2... Anode contact, 4... Braun tube, 5...
...Leak prevention (rubber) pad.

Claims (1)

[Claims] This leak prevention device is constructed by attaching a disc-shaped rubber pad made of silicone rubber between the anode contact, which is the high voltage application terminal of the cathode ray tube, and the anode cap, which is attached to supply high voltage to the anode contact.