Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – Terminal block
Reexamination Certificate
2001-10-23
2003-09-09
Martin, David (Department: 2841)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
Terminal block
C361S760000, C361S807000, C174S260000, C439S076200
Reexamination Certificate
active
06618272
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an electric-component connecting structure for connecting electric components to bus bars and, more particularly, to the structure for securely fixing and connecting electric components to bus bars without the use of solder.
Conventionally, in order to structure an electric circuit by arranging electric components, it has been a general practice to use a substrate for connecting conductors to the electric components. Naturally, solder connection has been used in connection to the electric components.
However, in solder connection, there is a problem with solder-crack occurrence in the temperature impact test based on the user's specification. Meanwhile, in the recent environmental problems, there is an emphasized problem for establishing a Pb-free structure free of Pb use.
SUMMARY OF THE INVENTION
Accordingly, in order to solve such a problem, it is an object of the present invention to provide an electric-component connecting structure that is free from crack occurrence in the temperature impact test, higher in reliability than solder connection and of a Pb-free structure.
The outline of the present invention will be explained with FIG.
1
. In
FIG. 1
,
1
is a resin case,
2
to
5
are bus bars,
6
to
10
are electric components,
11
is a hole,
21
is a projection and
61
is a lead leg.
The object of the invention can be achieved by the following structures (1) to (3).
(1) The electric component connecting structure includes: a resin case
1
; a bus bar
2
to
5
made of metal fixed on the resin case; and a welding projection
21
formed in the bus bar
2
to
5
, for connection to a lead leg
61
of an electric component
6
to
10
, wherein electric connection is made between the electric component
6
to
10
and the bus bar
2
to
5
by welding the welding projection
21
with the lead leg
61
of the electric component.
(2) In the electric component connecting structure of the above (1), fixing part is formed on the resin case to position or temporarily fix the electric component.
(3) The electric component connecting structure includes: a resin substrate; a bus bar made of metal fixed on the resin case; and a welding projection formed in the bus bar, for connection to a lead leg of an electric component, wherein electric connection is made between the electric component and the bus bar by welding the welding projection with the lead leg of the electric component.
This provides the below operation effects.
(1) By providing a bus bar
2
to
5
made of metal fixed on a resin case
1
, forming a welding projection
21
for welding to a lead leg
61
of each of a plurality of electric components
6
to
10
and welding the welding projection
21
to the electric-component lead leg
61
, electric connection is made between the electric component
6
to
10
and the bus bar
2
to
5
. Accordingly, it is possible to provide an electric component connecting structure which is free from crack occurrence in the connection even due to temperature impact test, free of Pb and higher in reliability than solder connection.
(2) Because the resin case is formed with fixing part to position or temporarily fix the electric component, it is possible, in advance of welding, to correctly position between the electric component and the welding projection. Thus, welding connection can be made with efficiency and correctness.
(3) By providing a bus bar made of metal fixed on a resin substrate, providing a plurality of welding projections for welding to lead legs of a plurality of electric components and welding the welding projection with the electric-component lead leg, electric connection is made between the electric component and the bus bar. Accordingly, it is possible to provide an electric component connecting structure which is free from crack occurrence in the connection even due to temperature impact test, free of Pb and higher in reliability than solder connection.
REFERENCES:
patent: 3013188 (1961-12-01), Kohler
patent: 4088828 (1978-05-01), Yamamoto et al.
patent: 4869675 (1989-09-01), Ogawa
patent: 5699235 (1997-12-01), Tsurumiya et al.
patent: 5872333 (1999-02-01), Uezono et al.
patent: 6015302 (2000-01-01), Butts et al.
patent: 6194656 (2001-02-01), Kondo et al.
patent: 6264510 (2001-07-01), Onizuka et al.
patent: 6283769 (2001-09-01), Asao et al.
patent: 6372998 (2002-04-01), Suzuki et al.
Hashimoto Akihiro
Sugata Morio
Tsuchiya Takahiro
Levi Dameon E.
Martin David
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
TDK Corporation
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