JPH0126057Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a base of an airtight container for accommodating a crystal resonator or the like.

In the base of an airtight container in which a lead wire is inserted into a hole in a metal base and the lead wire is fixed by filling the hole with molten glass, a phenomenon occurs in which the molten glass creeps up around the lead wire. This creeping up of the glass does not look good on the outside, and since it is a thin part of the molten glass and is fragile, if the lead wire is subjected to vibration or shock, it can chip or crack, which can lead to poor airtightness in the airtight container. There are many drawbacks.

The purpose of this invention is to provide an airtight terminal that can prevent molten glass from creeping up.

Hereinafter, the present invention will be explained based on the drawings. In Figs. 1 and 2, 1 is a solid type metal base made of metal such as Kovar, and this solid type metal base 1 has holes 2, 2. It is being 3, 3 are lead wires inserted into the holes 2, 2 of the solid type metal base 1;
A molten glass 4 fills the holes 2, 2 of the solid type metal base 1 and seals the lead wires 3, 3, for example, the holes 2, 2 of the solid type metal base 1,
First, the lead wires 3, 3 are inserted through the solid type metal base 1, and then the holes 2, 2 of the solid type metal base 1 are filled with molten glass 4, 4. In this case, lead wires 3, 3
In the middle part of each, there is a wide protruding large diameter part 5,
5 is provided, and the lower surfaces 6, 6 of the large diameter portions 5, 5 are attached to the upper surface 1a of the solid type metal base 1.
The large diameter portions 5, 5 of the lead wires 3, 3 are arranged in parallel with and sealed to the upper surfaces 7, 7 of the molten glasses 4, 4.

Next, FIG. 3 shows another embodiment of the present invention, in which lead wires 3, 3 are provided with another large diameter portion 5a, 5a at a distance from the large diameter portions 5, 5, and these diameters are The main portions 5, 5a are sealed inside the molten glass 4, 4.

As described above, in the airtight terminal of the present invention, the lead wire is provided with a large-diameter portion, and this large-diameter portion is sealed together with the lead wire to the upper surface of the molten glass that seals the lead wire. It will not be blocked by the large diameter part of the wire and will not creep up around the lead wire.
Since no creeping up part of the glass, which is a thin part of the molten glass, is formed around the lead wire, the glass at the base of the lead wire can be prevented from chipping or cracking due to vibration or impact being applied to the lead wire. In addition, the lead wire has a high pull-out strength and greatly contributes to the stable quality of airtight terminals. In addition, since the metal base is a solid type, the molten glass sealed in the hole penetrating the solid type metal base is stable. The glass, the lead wire, and the solid type metal base are closely interlocked, and the large-diameter portion of the lead wire prevents the molten glass from creeping up, which together reliably prevents the molten glass from breaking due to external force. There is.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a sectional view of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Solid type metal base, 1a... Top surface of metal base, 2, 2... Hole, 3, 3... Lead wire, 4, 4... Molten glass, 5, 5... Large diameter part of lead wire, 6, 6... Bottom surface of large diameter part, 7, 7...
...Top surface of molten glass.

Claims (1)

[Scope of utility model registration request] A solid type metal base 1 having holes 2, 2 through which lead wires 3, 3 are inserted through molten glass 4, 4; a hole 2 in the solid type metal base 1;
2 filled with molten glass 4, 4, a large diameter part 5, 5 protruding in the middle part, and another large diameter part 5a, 5 built in the molten glass 4, 4 below this large diameter part.
It consists of lead wires 3, 3 each having a
The airtight terminal is formed by arranging the lower surfaces 6, 6 of the large diameter portions 5, 5 of the lead wires 3, 3 almost parallel to the upper surface 1a of the solid type metal base 1 and sealing them to the upper surfaces 7, 7 of the molten glass 4, 4.