JPS6236295Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flag-shaped terminal in a thyristor or the like.

A power semiconductor device such as a thyristor or SCR (silicon controlled rectifier) has a bolt-shaped anode electrode 1a on one side, a cylindrical cathode electrode 1b and a pin-shaped gate electrode 1c on the other side, as shown in FIG.
An integrated element main body 1 is constructed, each of which has a protruding structure.

The anode electrode 1a is connected to the tangential portion of a predetermined circuit through its screw portion, and the gate electrode 1c is connected to the corresponding tangential portion of a predetermined circuit by soldering a lead wire with a lug terminal. On the other hand, as shown in FIG. 2, the cathode electrode 1b has a lead terminal A with a terminal formed by crimping a terminal 2 with a mounting hole 2a at the tip and a bonding cap 3 at the base end to a stranded wire 4, or the bonding cap 3.
The connection is made by fitting and then crimping or soldering, and is screwed into the corresponding connection part of a predetermined circuit with bolts and nuts through the attachment hole 2a.

The lead terminal A with a terminal has the advantage that it has a stranded wire 4 or is flexible, and can be freely bent and connected to the cathode electrode 1b in either direction. There are problems with the crimping process and its strength in No. 2 and the embossed process and strength of the proximal end joining cap 3. There are problems with the workability, cost, and conductivity of the stranded wire 4. Furthermore, there are many applications in which terminals do not require much flexibility and can be mounted on a structure between an anode and a cathode arranged at a very short predetermined interval, so it is desirable to develop a terminal that can provide a reliable connection at low cost. It was rare.

Therefore, the object of the present invention is to provide a flag-shaped terminal for a thyristor etc. that meets these requirements.

The embodiments of the invention will be described in detail below based on the drawings. Fig. 3 shows the support part 5, Fig. 4 shows the parts of the flag-shaped piece 6, and Fig. 5 shows the flag-shaped terminal of the invention composed of these parts. It is an overall view of B.

The mass support portion 5 has a split groove 5a provided along the axial direction at the tip of a conductive metal rod such as copper, and a knurl 5b carved at the base end of the rod. The shaft diameter on which the knurling 5b is formed is slightly larger than the cylindrical inner diameter of the cathode electrode 1b of the thyristor body 1.

Next, the flag-shaped piece 6 is also formed of a conductive metal plate such as copper, and on one flat plate side, a mounting hole 6a is bored for connecting to the other connecting part to the cathode electrode 1b via a bolt and a nut. On the other flat plate side, there is a fitting piece 6b that is press-fitted into the split groove 5a of the support part 5.
are provided, and the two flat plates are joined in a stepped manner so that the mounting bolts or nuts do not protrude.

A fitting piece 6b formed at the end of the flag-shaped piece 6
is press-fitted into the split groove 5a of the support portion 5, and the two are joined together by brazing or soldering to form the flag-shaped terminal B.

The flag-shaped terminal B of the present invention having the above-mentioned structure is attached to the inside of the cylindrical portion of the cathode electrode 1b of the element body 1 by press-fitting the knurled portion 5b, and is joined integrally by caulking, soldering or the like.

At this time, the uneven surface of the knurling 5b is held against the cylindrical inner wall of the cathode electrode 1b, preventing rattling and maintaining an upright state, thereby facilitating subsequent bonding. Incidentally, these flag-shaped terminals are coated with tin plating, etc., if desired, to prevent rust.

In this way, the flag-shaped terminal of the present application has an extremely simple structure in which a supporting part made of a conductive metal rod and a flag-shaped piece with a mounting hole formed in a conductive metal plate are fitted and integrated, and is low-cost. I can do it. In particular, since the support part is an integrated conductive metal rod, the cost of the wire itself is lower than that of conventional wires made by twisting together multiple wires.
Further, it has various advantages such as extremely simple processing of the connecting portions at both ends and good conductivity.

Further, by knurling the base end of the support part, there is an effect of facilitating joining and improving contact performance.
Note that the support portion can be made to have any length depending on the purpose, and in this case, a certain degree of flexibility can be imparted.

[Brief explanation of the drawing]

Figure 1 shows the semiconductor device body to which the flag-shaped terminal of the present invention is attached, Figure 2 shows the conventional lead wire with terminal, and Figure 3 shows the lead wire with a conventional terminal.
4 and 4 show the supporting part and the flag-shaped piece which are the constituent parts, and FIG. 5 shows the flag-shaped terminal of the present invention. Explanation of symbols, 1...Element body, 1a...Anode electrode, 1b...Cathode electrode, 1c...Gate electrode, 2...Terminal, 2a...Mounting hole, 3...Joining cap, 4...Twisted wire , 5... support part, 5a...
...Divided groove, 5b...Knurl, 6...Flag-shaped piece, 6
a...Mating piece, A...Lead wire with terminal, B...Flag terminal.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A supporting part with a groove provided at the tip of a conductive metal rod, and a flag-shaped piece made of a conductive metal plate with a mounting hole for the mating connection part in the center. A flag-shaped terminal for a thyristor or the like, characterized in that the flag-shaped terminal is provided and one end of the flag-shaped part is fitted into the split groove and joined together. (2) A flag-shaped terminal in a thyristor or the like according to claim (1), characterized in that a knurl is carved at the base end of the support portion.