JPH043407Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of the Invention] The present invention relates to an airtight terminal for circuit components.

[Background of the idea]

Conventionally, an airtight terminal, for example, an airtight terminal with an integrated lead wire sealed, has a base 1 as shown in FIG.
and a side wall 2 erected on this base 1,
A plurality of lead wire insertion holes 3 bored in the side wall 2
Lead wires 4, 4, . . . are inserted into the lead wires 4, 4, . The outer sides of the lead wires 4, 4... are integrally connected by a plate (not shown), and the lead wires 4, 4... are bent and the plate is cut.
It is designed to be connected to a circuit board 6.

Such an airtight terminal includes the lead wire main body 4,
4, . The lead wire 4 is bent and connected to the circuit board 6 in an upright position.

In this way, the airtight package for circuit components composed of the airtight terminals shown in FIG.
As shown in the figure, four peripheral walls 2 were prepared and formed by adhering them to the peripheral edge of a rectangular base 1. Therefore, the manufacture of airtight terminals is time-consuming and costly.

[Summary of the idea]

This idea was created with these points in mind.
It is an object of the present invention to provide an airtight terminal that is inexpensive and comparable in airtightness or sealing strength to conventional airtight terminals.

Therefore, the airtight terminal according to the present invention integrally forms the bottom and the peripheral wall standing on the bottom,
Further, a lead wire insertion hole is provided in the peripheral wall of the airtight terminal main body having a sealing flange formed outwardly on the peripheral wall, and a lead wire is inserted into the lead wire insertion hole,
The lead wire is sealed by embedding an insulating material in the lower part of the sealing flange and the lead wire insertion hole.

[Specific explanation of the idea]

An embodiment of the present invention will be described based on the drawings.

FIG. 2 is a perspective view of an embodiment of the present invention.
As is clear from FIG. 2, the box-shaped airtight terminal main body 10 has a bottom portion 21 and a peripheral wall 22 that stands continuously from the bottom portion 21.
A lead wire insertion hole 3 is drilled in a part of 2. Further, a sealing flange 23 is connected to the peripheral wall 22 and extends outward, and a lower portion of the sealing flange 23 is filled with an insulating material 5.

As shown in FIG. 3, the lead wires 4, 4, . By filling the lower part of the lead wire insertion hole 3 and the sealing flange 23 with an insulating material 5, the lead wires 4, 4...
is sealed. An adhesive flange 230 is formed on the outer edge of the sealing flange 23, and after connecting the circuit component 7 to the lead wire 4, the cover 8 is attached.
When bonding the terminal body 10 to the airtight terminal body 10, the bonding is performed at the bonding flange 230. By providing such an adhesive flange 230, it becomes possible to crimp the airtight terminal body 10 and the cover 8 without applying pressure to the insulating material 5 filled in the lower part of the sealing flange 23. Therefore, there is an advantage that there is no possibility of cracks occurring in the insulating material 5 due to pressure load. Therefore, the airtightness of the airtight terminal is not impaired, and the manufacturing yield is also improved.

According to the present invention, as is clear from Fig. 3,
The airtight terminal main body 20 does not have a structure in which a plurality of side walls 2 are respectively erected on the periphery of the base 1 as in the conventional case, but has a box shape such as a rectangular shape, and has a bottom part 21, The peripheral wall 22 and the sealing flange 23 have a structure in which they are integrally manufactured by drawing or the like. Furthermore, these bottom portion 21 and peripheral wall 22 are made thinner than the bottom portion (base 1) and side wall 2 of the conventional hermetic terminal, as is clear from FIG. That is, in order to ensure the sealing strength of the lead wires 4, 4... and the airtightness of the airtight terminal, the lead wires 4, 4...
It is necessary to make the length l of the portion sealed with the insulating material 5 of 4... to be a sufficient length. In conventional airtight terminals, the dimensions of the lead wire insertion hole 3 correspond to this sealing length l, and the dimensions of the lead wire insertion hole 3 are controlled by the thickness of the side wall 2. The side wall 2 in which the insertion hole 3 was formed needed to be thick enough to maintain sufficient sealing strength.

However, in the airtight terminal according to the present invention, since the sealing flange 23 is formed and the lower part of the sealing flange 23 is filled with the insulating material 5, the peripheral wall 22 of the airtight terminal body 10
The thickness of the lead wire 4 can be made thin regardless of the sealing strength of the lead wire 4. That is, the sealing strength is mainly controlled by the thickness of the insulating material 5 formed under the sealing flange 23.

FIG. 4 is a cross-sectional view of the lead wire sealing part of another embodiment of the present invention, and in this embodiment,
The lead wire 4 has a crank-shaped cross section.
21, one tip 40 of this lead wire 4 is inserted into the lead wire insertion hole 3, and the bent part 41 connected to this tip 40 is at the same level as the side surface of the insulating material 5, The other tip 42 is exposed and sealed with an insulating material 5 so as to extend outward. This type of airtight terminal has an outwardly extending tip 42 cut off and is bonded to the circuit board 6 with solder or the like at a vertically extending bent part 41, thereby reducing the volume occupied by the airtight package. It has the advantage of being able to

FIG. 5 is a sectional view of the sealing part of the third embodiment of the present invention, in which the insulating material 5 is
is curved and inclined from the tip of the sealing flange 23 to the bottom 21 of the airtight terminal body 10. In such an airtight terminal, a lead wire 4 is inserted into a lead wire insertion hole 3, an unpreformed insulating material 5 is placed, and the insulating material 5 is heated and melted to form a curved insulation material due to the surface tension of the insulating material 5. Five layers of material can be formed. Therefore, there is an advantage that the sealing can be carried out without using the preformed insulating material 5 as in the embodiment shown in FIG. 3, and without using a mold to hold the shape.

[Effect of idea]

As explained above, according to the airtight terminal of the present invention, a sealing flange is formed and the lower part of the flange is filled with an insulating material to seal the lead wire, which reduces the sealing strength of the lead wire. This has the advantage that the wall thickness of the airtight terminal body can be made thinner without increasing the thickness. Furthermore, since the airtight terminal main body can be manufactured integrally by drawing or the like, there is an advantage that manufacturing costs can be reduced.

Further, by forming an adhesive flange on the outer edge of the sealing flange, there is an advantage that the cover can be crimped without applying pressure load to the insulating material, and the yield can also be improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional airtight terminal, Fig. 2 is a perspective view of an embodiment of the airtight terminal according to the present invention, Fig. 3 is a cross-sectional view of the sealed portion of the embodiment, and Fig. 4 is a perspective view of the airtight terminal according to the present invention. A cross-sectional view of the sealing part of another embodiment of the airtight terminal according to
FIG. 5 is a sectional view of the sealing part of the third embodiment of the present invention. 1...Base, 2...Side wall, 3...Leat, 6
... Circuit board, 10 ... Airtight terminal body, 21 ...
bottom, 22... peripheral wall, 23... sealing flange,
230...Adhesive flange.

Claims (1)

[Claims for Utility Model Registration] (1) A lead wire is inserted into the peripheral wall of an airtight terminal body, which has a bottom and a peripheral wall standing on the bottom integrally formed, and a sealing flange formed outward on the peripheral wall. An airtight terminal characterized in that a hole is provided, a lead wire is inserted into the lead insertion hole, and an insulating material is provided at the lower part of the sealing flange and the lead wire insertion hole. (2) The hermetic terminal according to claim 1, which is a registered utility model, characterized in that a crimp flange is provided at the tip of the sealing flange.