JPH04237935A - Cathode-ray tube - Google Patents

Abstract

PURPOSE:To provide a structure for mounting a conductive band-shaped spring of which conduction film chin be formed easily without need for peeling off a conduction film on an anode button formed at a funnel part. CONSTITUTION:A nipple shaft 2 is provided on an anode button 3 installed on a funnel part 9, and a nipple slit part 1 is formed on both sides of a nipple head 10 provided at the upper part of the nipple shaft 2, and further both inner edges of a spring slit part 12 of a band-shaped spring 8 is insertion engaged with the nipple slit part 1. With the arrangement, the spring 8 is supported at the nipple slit part 1, and both ends of the spring 8 are respectively supported resiliently on a conduction film 6 of a pannel part 4 and the funnel part 9.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to cathode ray tubes used in television receivers, display monitors, etc., and in particular to a conductive strip plate that electrically connects a conductive film in a panel portion and a conductive film in a funnel portion. This relates to a cathode ray tube characterized by its spring mounting structure.

0002

[Prior Art] FIG. 4 shows, for example, Japanese Patent Application No. 1-1509.
01 is an enlarged cross-sectional view of a main part of a conventional cathode ray tube disclosed in No. . Reference numeral 9 denotes a funnel portion, in which a neck (not shown) for housing an electron gun (not shown) is integrally formed, and a conductive film 6 is formed on the inner surface of the funnel portion.

[0003] The above-mentioned panel portion 4 and funnel portion 9 are bonded together through a frit glass 7 with their respective open ends in contact with each other, thereby forming an envelope.

Further, 8 is a conductive strip-shaped leaf spring,
Specifically, as shown in FIG. 5, two narrow plate parts 8B are formed from the central wide plate part 8A toward both left and right sides.
, 8C are integrally extended, and L is provided on one side of the wide plate portion 8A.
A spring slit portion 12 is formed by cutting and raising the letter-shaped protrusion portion 11 .

[0005] Note that the narrow plate portions 8B and 8C have contact portions 8b and 8C curved into approximately arcuate shapes at the tips thereof, respectively.
These contact portions 8b and 8c are elastically supported on the conductive film 6 on the panel portion 4 side and the conductive film 6 on the funnel portion 9 side.

Further, in FIG. 4, reference numeral 3 denotes an anode button provided in the funnel portion 9, and a nipple shaft 2 having a nipple head 10 on the upper part is fixed to the anode button 3. These are sometimes simply referred to as an anode button with a nipple shaft 3.

Next, a method of attaching the conductive strip-shaped leaf spring to the cathode ray tube will be explained based on FIGS. 4 and 5. First, the strip-shaped leaf spring 8 is attached so that its L-shaped protrusion 11 side faces inward. In this state, the nipple shaft 2 provided on the anode button 9 provided in the funnel portion 9 is fitted into the spring slit portion 12 formed in the wide plate portion 8A at the center, and the nipple shaft is 2. The upper nipple head 10 is housed and held in the space formed between the L-shaped protrusion 11 and the spring slit 12.

[0008] Next, the open end surfaces of the funnel section 9 and the open end surfaces of the panel section 4 are bonded together with a frit glass 7 in a state where they are in contact with each other, thereby obtaining a desired cathode ray tube.

In this way, as shown in FIG. 4, the abutting portions 8b and 8c of the strip-like leaf spring 8 apply elastic pressure to the conductive film 6 of the panel portion 4 and the conductive film 6 of the funnel portion 9, respectively. is supported by the conductive film 6 and the anode button 3.
are electrically connected.

0010

[Problems to be Solved by the Invention] However, according to the above-mentioned cathode ray tube, when attaching the band-shaped leaf spring 8,
The band-shaped leaf spring 8 is slightly bent and flexed, and its spring slit portion 12 is inserted into the nipple shaft 2 of the anode button 3. A conductive film 6 formed on 3
Because of the inconvenience of peeling off the conductive film 6, it was not possible to form the conductive film 6 close to the nipple axis 2.

[0011] Furthermore, it is very difficult to form the conductive film 6 only on the anode button 3, and there are disadvantages such as the conductive film 6 being formed even on the nipple shaft 2.

The present invention was made to solve the above-mentioned disadvantages, and there is no fear of peeling off the conductive film formed on the anode button, and the conductive film can be easily formed on the anode button. The purpose is to provide cathode ray tubes.

[0013]

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a nipple shaft is attached on the anode button of the panel part constituting the cathode ray tube, and the nipple head section attached on the nipple shaft is attached on both sides. A spring slit portion formed by an L-shaped protrusion cut and raised approximately at the center of a conductive strip-shaped leaf spring that electrically connects the conductive film of the panel portion and the conductive film of the funnel portion is provided in the nipple slit portion provided. The present invention is characterized in that the band-shaped leaf spring is elastically supported and fixed on the conductive film of the panel portion and the funnel portion by being inserted and fitted.

[0014]

[Function] According to the present invention, the nipple slits formed on both sides of the nipple head attached to the nipple shaft on the anode button provided in the panel part of the cathode ray tube conduct electricity between the conductive film of the panel part and the conductive part of the funnel part. By inserting the spring slit portion of the conductive strip-shaped leaf spring that electrically connects the membrane, both inner edges of the spring slit portion of the strip-shaped leaf spring are engaged with the nipple slit portion, and the nipple head portion is accommodated within the L-shaped protrusion of the band-shaped leaf spring and is supported and fixed. Therefore, the movement of the band-shaped leaf spring in the vertical direction is restricted by the existence of the nipple slit portion. At the same time, the contact portions at both ends of the strip-shaped leaf spring are supported elastically on the conductive film of the panel portion and the conductive film of the funnel portion. In this way, the strip-shaped leaf spring is attached to predetermined portions of the panel portion and the funnel portion, so there is no risk that the conductive film formed near the nipple axis will be peeled off by the spring slit portion of the strip-shaped leaf spring.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of an anode button with a nipple shaft used in a cathode ray tube according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the anode button, and FIG. 3 is an enlarged cross-sectional view of essential parts of a cathode ray tube according to an embodiment of the invention. be.

First, in FIG. 1, 3 is an anode button, and a nipple shaft 2 is attached to the top of this anode button 3, and nipple slits 1 are formed on both sides of the upper part of the nipple shaft 2. nipple head 10
is installed.

In the anode button with a nipple shaft constructed as described above, the anode button 3 is implanted in a predetermined position of the funnel portion 9, as shown in FIG. A conductive film 6 is formed on the inside of the anode button 3, and a phosphor layer 5 and a conductive film 6 are formed on the inside of the panel portion 4.

While slightly bending and bending the band-shaped leaf spring 8 shown in FIG. 5, the spring slit portion 12 formed by cutting and raising the L-shaped protrusion 11 is inserted into the nipple slit of the anode button with nipple shaft shown in FIG. When the strip-shaped leaf spring 8 is inserted into and engaged with the portion, as shown in FIG. 8b and 8c are elastically supported on the conductive film 6 of the panel portion 4 and the conductive film 6 of the funnel portion 9 by the spring elasticity of the band-shaped leaf spring.

Furthermore, the width X of the spring slit portion 12 of the band-shaped leaf spring 8 shown in FIG. Moreover, it goes without saying that the vertical movement of the band-shaped leaf spring 8 is regulated, and the dimensions are such that the engaged state can be ensured without falling off after insertion.

As described above, the conductive film 6 on the panel portion 4 side and the conductive film 6 on the funnel portion 9 side are electrically connected by the conductive strip-shaped leaf spring 8, and moreover, the conductive film 6 on the side of the funnel portion 9 is electrically connected. Since the inner surface of the funnel part 9 of the provided anode button 3 with a nipple shaft is coated with a conductive film 6 so that it can be electrically connected to the anode button 3, it is inevitable that the panel part 4 and a conductive film 6 formed on the funnel part 9 and an anode button 3 with a nipple shaft.
is electrically connected to.

It goes without saying that the panel section 4 and the funnel section 9, to which the band-shaped leaf spring 8 is attached, are bonded together by the frit glass 7 with their open end surfaces in contact with each other.

[0022]

[Effects of the Invention] As described above, according to the present invention, the strip-shaped leaf spring is supported and fixed at the nipple slit of the anode button with a nipple shaft, so that the strip-shaped leaf spring can be attached without peeling off the conductive film. Furthermore, since the conductive film can be formed close to the nipple axis, there is an effect that the resistance between the anode button and the conductive film can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view of an anode button with a nipple shaft used in a cathode ray tube according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of an anode button with a nipple shaft used in a cathode ray tube according to an embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of a cathode ray tube according to an embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part of a conventional cathode ray tube.

FIG. 5 is an enlarged perspective view of a band-shaped leaf spring.

[Explanation of symbols]

1 Nipple slit part 2 Nipple shaft 3 Anode button 4 Panel part 5 Phosphor layer 6 Conductive film 8 Band-shaped leaf spring 9 Funnel part 10 Nipple head 11 L-shaped protrusion 12 Spring slit part

Claims (1)

[Claims] 1. Consisting of a panel part and a funnel part provided with an anode button, the conductive film formed on the phosphor layer inside the panel part and the conductive film formed inside the funnel part are electrically conductive. In a cathode ray tube that is electrically connected by a strip-shaped leaf spring, a nipple shaft is attached to the anode button, and a nipple slit provided on both sides of the nipple head attached to the nipple shaft is inserted approximately in the center of the strip-shaped leaf spring. A cathode ray tube characterized in that the band-shaped leaf spring is supported and fixed on the conductive film of the panel part and the funnel part by inserting a spring slit part formed by an L-shaped projection part cut and raised.