JP3408977B2 - Anode connection structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anode connection structure for introducing a high voltage into a cathode ray tube. FIG. 1 is a sectional view of a cathode ray tube. The cathode ray tube 1 comprises a funnel 2 which is usually an outer container, an electron gun 3 for emitting electrons, and a face plate 4 provided with a fluorescent film which emits light by electron collision to draw an image. here,
The funnel 2 of the cathode ray tube 1 and a part of the inner surface of the face plate 4 (the part from the vicinity of the electron gun to the fluorescent film) are provided with the conductive films 5 and 8, and a high voltage is applied thereto. FIG. 2 is a partial cross-sectional view showing the vicinity of a funnel cone of a conventional cathode ray tube. A metal component 6 called an anode button for introducing a high voltage into the funnel is embedded and welded to the funnel cone portion 2a. A conductive film 5 is disposed on the inner surface of the funnel cone portion 2a, and a high voltage is applied to the conductive film 5 via an anode contact 7. A conductive film 8 is formed on the face plate 4, and a high voltage is applied through the anode contact 7. FIG. 3 is a front view showing the vicinity of an anode contact showing a conventional anode connection structure, and FIG. 4 is a side view. The cathode ray tube has a flat face plate 4 on the open end face of the funnel cone portion 2a and a frit glass 9 on the open end face.
The structure is welded by Funnel cone 2a
An anode button 6 is welded to the base member, and a pin 10 is fixed to the bottom of the anode button. Inside the funnel cone portion 2a, the conductive film 5 is formed on one surface including the surface of the anode button 6. Face plate 4
, A fluorescent film (not shown) is formed at the center, and a light-shielding conductive film 8 is formed therearound. A metal film (not shown) called a metal back is formed on the upper surface of the fluorescent film. The outer periphery of the conductive film 8 is welded to the open end of the funnel cone portion 2a by the frit glass 9. The anode contact 7 is a stepped pin 1 fixed to the anode button 6.
0 and is rotatably fixed at one end, and one end thereof is in contact with the conductive film 8 formed on the face plate 4. With this anode connection structure, the high voltage supplied to the anode button 6 is supplied to the conductive film 5 formed on the funnel, the conductive film 8 formed on the face plate 4, and the metal back. The bottom portion of the anode button 6 has a diameter of 6 mm and the maximum outer diameter is about 10 mm. The small diameter portion 10a of the stepped pin 10 fixed to the anode button 6 has a diameter of 1 mm and a length of 3 mm.
It is a very small part such as mm. Anode button 6
An end surface of a portion of the stepped pin 10 having a large outer diameter is fixed to the bottom surface of the pin. By fitting and fixing the anode contact 7, the distance from the bottom surface of the anode button 6 is arbitrarily set (determined by the length of the large-diameter portion) to be constant. As shown in FIG. 3, the anode contact 7 has a Y-shape (or a substantially T-shape). A hole is formed by pressing from a thin strip of material and is engaged with the small diameter portion 10 a of the stepped pin 10 fixed to the anode button 6. A dowel 7a for contacting the conductive film 5 formed on the funnel cone portion 2a is formed substantially at the center. Extending to both sides at the top are terminals for contacting the conductive film 8 formed on the face plate 4 at the tip, and have a spring property so that the tip 7b can move downward in the figure. . When the anode contact 7 is attached, the terminal portion 7b protrudes above the open end face of the funnel cone portion 2a, but the conductive film 8 formed on the face plate 4 is brought into contact with the terminal portion 7b of the anode contact 7. The face plate 4 is pressed against the open end face of the funnel via the frit glass 9 and welded, thereby
The terminal portion 7b of the anode contact 7 and the conductive film 8 of the face plate 4 are configured to be electrically connected by spring pressure. [0008] In connection with a high voltage, a problem arises when the contact resistance is large.
Sufficient contact pressure is required. Further, in the conductive film of the face plate, the anode contact needs to be brought into contact with a position where the contact anode contact is not projected on this image portion in order to draw an image. As described above, the contact pressure and the contact position accuracy are required for the anode contact for the contact, and it is conceivable to make the plate material of the anode contact thicker for the former contact pressure. Difficult and problematic in operation. Regarding the latter contact position accuracy, when the elastic force of the anode contact is reduced, the forcing force is reduced, and the position is greatly shifted in the direction A in FIG. 4, and in some cases, the elastic body is reflected in the image. Problems arise. An object of the present invention is to provide an anode connection structure capable of securing sufficient contact pressure and contact position accuracy without lowering workability. SUMMARY OF THE INVENTION The present invention provides an anode button which penetrates a funnel cone to introduce a high voltage from the outside into a cathode ray tube, and which is mounted on a portion of the anode button located inside the cathode ray tube. In the anode connection structure formed by fitting an anode contact to the pin,
One end of an elastic body is fixed to the anode contact, and the other end of the elastic body and the anode button are fixed with the pin of the anode button sandwiched therebetween. An embodiment of the present invention will be described below with reference to FIGS. FIG. 5 is a front view of the vicinity of an anode contact showing an anode connection structure according to an embodiment of the present invention, and FIG. 6 is a side view. A stepped pin 10 fixed by, for example, welding is attached to a portion of the anode button 6 buried and fixed in the funnel cone portion 2a located inside the cathode ray tube, and an anode contact 7 is fitted to the pin. Conductive film 8 of face plate 4
And the conductive film 5 inside the funnel cone portion 2a. Up to now, the configuration is the same as that of the above-described conventional technology. The anode contact 7 is an elastic body having a spring property, and is made of a thin plate material of, for example, 0.1 mm due to its function and ease of manufacture. However, the elastic force has sufficient fixing force (contact pressure)
Therefore, the elastic body 11 having a further spring property is attached for reinforcement. One end of the plate-like elastic body 11 is fixed to the anode contact 7 by welding or the like. The other end of the elastic body 11 is brought into contact with the small-diameter portion 10a of the pin by fitting the anode contact 7 to which the elastic body 11 is fixed to the small-diameter portion 10a of the pin (to be pressed),
The pin 10 of the anode button 6 is fixed by the elastic body 11 and the anode button 6 with the pin 10 sandwiched therebetween. Therefore,
The anode contact 7 is pushed by the elastic body 11 in the direction of the arrow B in FIG. 6, and is kept pressed inside the funnel cone 2a. With this structure, it is possible to prevent displacement in the direction A opposite to the direction B. As a method of attaching the elastic body 11 to the pin small-diameter portion 10a side, a hole (not shown) for engaging the pin with the small-diameter portion is provided in the elastic body 11 and the pin small-diameter portion 10a is provided. May be fitted by the holes. Further, if a step is provided in the small-diameter portion 10a of the pin, the elastic body is positioned and the displacement of the stepped pin 10 toward the step (the inner surface of the funnel cone 2a) is prevented. According to the present invention, an anode contact is fitted and fixed to a pin of an anode button, and at the same time, an elastic body is attached while sandwiching the pin. Can be satisfied with respect to the design value. The present invention is suitable for application to, for example, a small cathode ray tube having an anode button of about 10 mm.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a cathode ray tube. FIG. 2 is a partial cross-sectional view showing the vicinity of a funnel cone of a conventional cathode ray tube. FIG. 3 is a front view showing the vicinity of an anode contact showing a conventional anode connection structure. FIG. 4 is a side view of the vicinity of an anode contact showing a conventional anode connection structure. FIG. 5 is a front view showing the vicinity of an anode contact showing an anode connection structure in one embodiment of the present invention. FIG. 6 is a side view showing the vicinity of an anode contact showing an anode connection structure in one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 cathode ray tube 2 funnel 2 a funnel cone part 3 electron gun 4 face plate 5 conductive film 6 anode button 7 anode contact 8 conductive film 9 frit glass 10 stepped pin 10 a stepped pin small diameter section 11 elastic body

Claims (1)

(1) An anode button that penetrates through a funnel cone to introduce a high voltage from the outside into the cathode ray tube, and is mounted on a portion of the anode button located inside the cathode ray tube. In a pin and an anode connection structure formed by fitting an anode contact to the pin, one end of an elastic body is fixed to the anode contact, and the pin of the anode button is sandwiched between the other end of the elastic body and the anode button. An anode connection structure characterized by being fixed.