JPH067575Y2 - Airtight terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an airtight terminal, and more particularly to an airtight terminal capable of hermetically sealing circuit parts such as a crystal unit and a semiconductor device.

(Prior Art) FIG. 1 is a perspective view of a conventional airtight terminal. As is clear from this figure, the airtight terminal forms a box-shaped airtight space 2 with an insulating material 1 such as glass or ceramic. At the same time, the lead terminal 3 is sealed on the side surface 11 of the insulating material 1 so as to penetrate the inside and outside of the airtight space 2. Then, a metal frame 4 is provided on the upper end of the box-shaped insulating material 1.
Is provided.

When a circuit component is hermetically sealed using such an airtight terminal, a circuit component (not shown) is loaded in the airtight space 2 and the circuit component is mounted on the lead terminal 3 exposed in the airtight space 2. Are connected, the cover 5 is covered, and the cover 5 is pressure-bonded to hermetically seal the circuit component.

In such an airtight terminal, since the main body forming the airtight space 2 is the insulating material 1 such as glass or ceramics, there is an advantage that it is lightweight and inexpensive, but the circuit component is mounted in the airtight space 2. After that, when the cover 5 is pressure-bonded to the metal frame 4, the pressure of the pressure-bonding may cause cracks in the insulating material 1.

Further, in recent years, a situation has been considered in which the circuit component malfunctions due to radio interference. However, generally, the insulating material 1 such as glass or ceramic has a property of transmitting radio waves, and in particular, it has become unsuitable as a sealed terminal for a sealed container of a circuit component of an electric device in which a malfunction is fatal.

(Object of the Invention) The present invention has been made in view of the above points, and an object of the present invention is to provide an airtight terminal that does not cause cracks or the like in the insulating material when the cover is pressure-bonded and can prevent radio interference. Is.

In order to achieve the above object, the airtight terminal according to the present invention is provided with outwardly projecting flanges at the upper and lower ends of a metal box-shaped body, and the lead terminals are inserted through the side surfaces of the box-shaped body. It is characterized in that a hole is formed, the lead terminal is inserted into the lead terminal insertion hole, and then an insulating material is filled in a sealing gap composed of a protruding flange and a side surface of the box-shaped body.

(Embodiment) FIG. 2 is a perspective view of an embodiment of the present invention. As is apparent from this figure, the airtight terminal according to the present invention also has an airtight space 2.
A lead terminal 3 penetrating in and out of is sealed by an insulating material 1.

The airtight terminal body 6 which constitutes the airtight terminal of the present invention is basically a metal box-shaped body, and a side surface 61 thereof is provided with a lead terminal insertion hole 62 for inserting the lead terminal 3. Has become. The airtight terminal main body 6 has an upper end provided with an outwardly projecting mounting flange 63 over the entire circumference, and a lower end provided with an outwardly projected flange 64 over the entire circumference. There is. Therefore, the airtight space 2 has a lead terminal insertion hole 62.
And the structure is covered with metal except the upper opening.

The lead terminal 3 is inserted into the lead terminal insertion hole 62 of the airtight terminal body 6 and the space formed by the side surface 61, the mounting flange 63 and the flange 64 is filled with the insulating material 1 to seal the lead terminal 3. I'm wearing it.

When the airtight terminal having such a structure is used, after mounting the circuit component in the airtight space 2 as in the conventional case, it is connected to the lead terminal 3, the cover 5 is covered, and the mounting flange 63 is crimped. In this case, since the insulating material 1 is filled in the space surrounded by the side surface 61 of the airtight terminal body 6, the mounting flange 63 and the flange 64, the pressure load at the time of crimping can be suppressed to a minimum. Does not easily crack. Further, the airtight space 2 is a metal cover 5
Also, since it is composed of the airtight terminal body 6 and is surrounded by metal, radio wave interference is not caused.

It is also possible to provide an insulating material layer (not shown) on the bottom surface of such an airtight terminal and directly mount it on a circuit board or the like.

FIG. 4 is a sectional view of the second embodiment according to the present invention.
As is apparent from this figure, the second embodiment has a structure in which the attachment flange 63 is provided with a welding projection 65. In the case of the structure shown in FIG. 4, the cover 5 can be attached by welding.

FIG. 5 is a perspective view of the third embodiment of the present invention. As is apparent from this figure, the flange 63 is directly provided with the ground ground 7 therein. In this case, it is not necessary to ground at least one of the lead terminals 3.

The airtight terminal body having the above structure can be easily manufactured by extrusion.

(Effect of the Invention) As described above, according to the airtight terminal of the present invention,
Since the airtight space is surrounded by metal, there is no fear of radio wave interference. Furthermore, since the insulating material 1 is also filled in the space surrounded by the metal, there is an advantage that a crack is not generated at the time of pressure bonding or welding. Further, if the airtight terminal body is manufactured by extrusion processing, there is an advantage that it can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a conventional airtight terminal, FIG. 2 is a perspective view of an embodiment according to the present invention, FIG. 3 is a sectional view of the embodiment, and FIG. 4 is a second embodiment of the present invention. A sectional view and FIG. 5 are perspective views of a third embodiment according to the present invention. 1 ... Insulation material, 2 ... Airtight space, 3 ... Lead terminal, 4
…… Metal frame, 5 …… Cover, 6 …… Airtight terminal body, 61
...... Side face, 62 ...... Lead terminal insertion hole, 63 ...... Mounting flange, 64 ...... Flange, 7 ...... Ground ground.

Claims (1)

[Scope of utility model registration request] 1. A metal box-shaped body is provided with outwardly projecting flanges at the upper and lower ends thereof, and lead terminal insertion holes are formed on the side surfaces of the box-shaped body. The lead terminal insertion holes are provided in the lead terminal insertion holes. An airtight terminal characterized in that an insulating material is filled in a sealing gap formed by a protruding flange and a side surface of a box-shaped body after the insertion.