JPH0227490Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention improves the structure of the lead terminals of large fluorescent display tubes to increase vibration resistance and prevent breakage.

In the conventional fluorescent display tube 1 of this type, the tip end 3 of the lead terminal 2 is formed to be stepped and narrow, as shown in FIG. This made it easier to insert into the hole in the board and also had the function of a stopper.

Since the conventional fluorescent display tube 1 was generally small and lightweight, the stress on the lead terminals 2 was small even when subjected to vibrations, and therefore the lead terminals 2 did not break.

However, if the lead terminal 2 as described above is employed in a large fluorescent display tube having a large number of display bodies, the vibration resistance will deteriorate due to its weight, and the tapered tip portion 3 will easily break. For this reason, if the tip portion 3 is held with rubber or the like, the base portion 4 will break.

On the other hand, since the fluorescent display tube 1 swings vertically and horizontally, an acting force with a torsional component is generated, and in particular, the lead terminals 2A located at both ends as shown in FIG.
Experiments revealed that stress is concentrated at

The present invention has been devised in view of these points, and its contents will be explained below based on the illustrated embodiments.

In FIGS. 3 to 5, 10 is a fluorescent display tube main body, which mainly includes a glass substrate 11, wide lead terminals 12, narrow lead terminals 13, and a cover glass 1.
It consists of 4.

The wide lead terminal 12 and the narrow lead terminal 13 have their bases 15 connected to the glass substrate 11 and the cover glass 1.
A fritted glass (not shown) is used between the 4 and 4 to maintain a narrow bonding pressure.

The wide lead terminal 12 shown in FIG. 5 is provided with a through hole 16 so that the cover glass 14 and the glass substrate 11 can be well bonded and fixed by frit glass.

The wide lead terminal 12 described above is a filament lead terminal and is located at the outermost side of the fluorescent display tube body 10, and is the position where stress is most concentrated when vertical and horizontal forces are applied to the fluorescent display tube body 10. It is.

Therefore, wide lead terminals 12 are disposed on the outermost side of the fluorescent display tube body 10 to improve vibration resistance. Furthermore, even if the large fluorescent display tube main body 10 is heavy, there is no risk of breakage since the wide lead terminals 12 are used.

The narrow lead terminals 13 are appropriately arranged between the wide lead terminals 12 disposed on the outermost side. Reference numeral 17 denotes a narrow portion made narrow by the step of the narrow lead terminal 13.

This narrow lead terminal 13 is a segment and grid lead terminal.

The present invention has the above-mentioned configuration, and in particular, has a wide lead terminal provided on the outermost side of the fluorescent display tube body, so it has excellent vibration resistance and is suitable for use in large, heavy fluorescent displays. Even in the case of the tube body, there is no fear that the lead terminal will break or break, and there is no need to add a holder such as rubber for the lead terminal to the outside, making it inexpensive and having many practical benefits.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the conventional product, Fig. 2 is an explanatory diagram of the stress concentration mode, Fig. 3 is a perspective view of the product of the present invention, Fig. 4 is a plan view of the product of the present invention, and Fig. 5 is a diagram of the product of the present invention. FIG. 3 is an exploded perspective view of main parts. 10...Fluorescent display tube body, 11...Glass substrate, 12...Wide lead terminal.

Claims (1)

[Scope of utility model registration request] A lead terminal structure for a fluorescent display tube in which at least one wide lead terminal 12 is disposed on the left and right outermost sides of a fluorescent display tube main body 10, and a plurality of narrow lead terminals 13 are disposed in between.