JPH0538512Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a terminal structure for an electron tube, and more particularly to a technique for connecting a detachable terminal to a thin circular metal plate.

[Conventional technology]

Although there are various terminal structures for electron tubes, a method using an enclosure plate made of thin metal is often used to guide the vacuum electrodes of the electron tube to the outer periphery of the vacuum envelope.

For example, as shown in Fig. 1, on both sides of an enclosure plate 1 made of covar or the like, alumina ceramic cylinders 2 and 3, which also serve as a vacuum envelope with metalized ends and electrical insulation, are covered with gold solder or other materials. It consists of terminals 4 which are soldered with silver solder or the like and further arranged to surround the enclosure tray 1.

Here, the terminal 4 is made detachable from the enclosure tray 1 and is removed during the brazing process and the process of exhausting the air inside the electron tube. After the evacuation process is completed, the terminal 4 is fixed to the enclosure pan 1. Conventionally, as shown in FIG. Alternatively, as shown in Fig. 2b, a groove may be provided on the inner circumferential surface of the terminal 4 and two screws may be used in the diameter direction.
Divide it, and when using it, fit the inclusion plate 1 into the groove,
The method used was to combine and tighten two terminals.

[Problem that the invention attempts to solve]

In the structure shown in Fig. 2a, since the terminal 4 is annular, this method cannot be applied to a large number of enclosure plates with the same diameter lined up in the axial direction, and the diameter of the enclosure plates is gradually adjusted to the back. As it progresses, it needs to get bigger, and it can't be made cheaper by using the same parts.

The structure shown in FIG. 2b does not have the above-mentioned drawbacks, but since the diameter of the bottom of the groove of the terminal 4 needs to be the same as or slightly larger than the outer diameter of the enclosure dish 1, the terminal 4 divided into two parts is Even when they are combined, electrical contact with the enclosure dish 1 is made only at points, which makes them unsuitable as a terminal structure for conducting large currents.

The present invention eliminates the drawbacks of the conventional terminal structure and provides an inexpensive terminal for an electron tube that can conduct a large current.

[Means for Solving the Problems] The terminal structure of the present invention includes an enclosure plate made of a disk-shaped metal located on the outer periphery of the vacuum envelope of the electron tube and electrically connected to the electrodes in the vacuum of the electron tube; A metal that is arranged around the outer periphery of the inclusion dish, has an annular shape divided into two in the diametrical direction, and has a groove with a V-shaped bottom on the inner circumferential surface of the annular ring, and has an elastic modulus smaller than that of the inclusion dish. It has a terminal consisting of.

〔Example〕

FIG. 1a is a sectional view of an embodiment of the present invention,
FIG. 1b is a cross-sectional view showing details of the terminal.

Since the enclosure dish 1 needs to be firmly bonded to ceramic, it is often made of cover or the like, and sometimes Kyupro Nickel is used. Its thickness is usually about 1 mm. On the upper and lower surfaces of this enclosure dish 1,
Cylindrical alumina ceramics 2 and 3 are brazed together. Although not shown in the figure, the enclosure dish 1 is connected to an electrode or the like inside the vacuum side. Enclosure dish 1
A terminal 4 made of a metal having a relatively small elastic modulus, such as aluminum, is placed on the outside.
A connecting wire or the like is attached to the terminal 4.

Here, the cross-sectional shape of the terminal 4 consists of a groove 5 provided on the inner circumferential surface of the ring and a V at the bottom of the groove, as shown in Fig. 1b.
It is characterized by the shape of the letters. Further, the terminal 4 is divided into two parts in the diameter direction of the ring, and after being separated and assembled, they can be tightened together with screws or the like.

When the terminal 4 is fitted into the enclosure plate 1 and the two parts are tightened, the terminal 4 is made of aluminum as mentioned above and has a smaller elastic modulus than the enclosure plate 1. 1 is terminal 4
It can be inserted into the V-groove part of the V-groove to maintain good electrical contact.

Further, since the terminal 4 is divided into two parts, it can be used in a large number of enclosure plates having the same diameter arranged in the axial direction.

[Effect of idea]

As described above, by adopting the present invention, it is possible to realize an electron tube terminal structure that is inexpensive and has high reliability of electrical contact because terminals having the same shape can be used.

[Brief explanation of the drawing]

FIG. 1a is a sectional view of the terminal structure of the present invention, the first
Figure b is a sectional view showing details of the terminal of the present invention, the second
Fig. 2a is a sectional view of a conventional terminal structure, and Fig. 2b is a sectional view showing details of another conventional terminal. 1... Enclosure plate, 2, 3... Ceramic, 4...
Terminal, 5...V-shaped groove.

Claims (1)

[Scope of utility model registration request] An enclosure plate made of a disc-shaped metal located on the outer periphery of the vacuum envelope of the electron tube and electrically connected to the vacuum electrodes of the electron tube; In the terminal structure of an electron tube, the terminal has a metal terminal having an annular shape, and after the terminals are separated and assembled, they are tightened and fixed to each other with screws, etc., wherein the bottom part is V-shaped on the inner circumferential surface of the annular ring of the terminal. What is claimed is: 1. A terminal structure for an electron tube, comprising a groove, and wherein the elastic modulus of the metal of the terminal is smaller than the elastic modulus of the enclosure plate.