Power-supply breaker apparatus

Details Power-supply breaker apparatus Power-supply breaker apparatus

2000-01-19

2001-11-13

Tolin, Gerald (Department: 2835)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electrical power distribution systems and devices

C361S626000, C361S646000, C337S194000

Reexamination Certificate

active

06317312

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a power-supply breaker apparatus, and more specifically relates to a power-supply breaker apparatus for breaking an electric circuit suitably when operational maintenance for a power-supply circuit and equipments of an electric automobile and the like is performed.
In recent years, since a transportation equipment such as an electric automobile is provided with a high-voltage portion for driving a motor, it is equipped with a power-supply breaker apparatus taking maintenance into consideration.
SUMMARY OF THE INVENTION
According to the examination by the inventors, a power-supply breaker apparatus shown in
FIGS. 5 and 6
is suggested.
As shown in
FIGS. 5 and 6
, a pair of main body side terminals
2
and
3
are provided in an apparatus main body
1
of the power-supply breaker apparatus so as to be fastened thereto by screws
4
.
Base ends of a pair of operation side terminals
5
and
6
are rotatively supported to the apparatus main body
1
, and the ends of the pair of operation side terminals
5
and
6
are connected at a holding section
7
.
In such a structure, the holding section
7
is rotated in a counterclockwise direction in the drawing, and the pair of operation side terminals
5
and
6
are fitted between nipping end pieces
2
a
and
2
a
and between nipping end pieces
3
a
and
3
a
of the pair of main body side terminals
2
and
3
so that the electric circuit is conductive.
Meanwhile, the holding section
7
in this state is rotated in a clockwise direction in the drawing and the pair of operation side terminals
5
and
6
are detached from the pair of main body side terminals
2
and
3
so that the electric circuit is broken.
Therefore, when the transportation equipment equipped with the power-supply breaker apparatus is maintained, the electric circuit can be broken.
However, in this power-supply breaker apparatus, since the pair of main body side terminals
2
and
3
, which are receiving sides of the pair of operation side terminals
5
and
6
, are fixed to the apparatus main body
1
, if a pitch P
1
between the pair of main body side terminals
2
and
3
differs from a pitch P
2
between the pair of operation side terminals
5
and
6
, a fit detaching force between both the terminals increases so that operability of the holding section
7
is deteriorated.
Therefore, the present invention has been achieved in order to solve the above examined problem. It therefore is an object of the present invention to provide a power-supply breaker apparatus in which even in the case where a pitch between one pair of terminals for making conductive/breaking an electric circuit differs from a pitch between the other pair of terminals, a fit detaching force (fitting/detaching force) between both the terminals does not increase and operability of a plug can be improved.
A power-supply breaker apparatus of the present invention includes a fuse provided between a power supply and a load in an electric circuit, an apparatus main body for housing the fuse, a first bus bar whose one end is fixed to one fuse terminal of the fuse, a second bus bar fixed to one of the power supply and the load, a plug housing chamber for housing a plug movably in the fitting/detaching direction in the apparatus main body, and a pair of plug side terminals being conductive with each other in the plug. Here, the electric circuit becomes conductive via the fuse, and the other end of the first bus bar is extended so as to be composed as one terminal of the pair of main body side terminals, and the other end of the second bus bar is extended so as to be composed as the other terminal of the pair of main body side terminals. At least one of the first bus bar and the second bus bar is freely deflected in a direction crossing substantially perpendicularly to the fitting/detaching direction so that a distance between the pair of main body side terminals varies, and the plug moves in the fitting/detaching direction so that the pair of plug side terminals are freely fitted into and detached from the pair, of main body side terminals.
In this structure, even if a pitch of the pair of main body side terminals differs from a pitch of the pair of plug side terminals, at least one of the first bus bar and the second bus bar is deflected so that at least one of the pair of main body side terminals moves in the direction crossing perpendicularly to the terminal fitting/detaching direction, and thus the terminals can shift so that the pitch between the pair of main body side terminals agrees with the pitch between the pair of plug side terminals. As a result, the difference of the pitches can be absorbed, and a fitting/detaching force can be approximately constant.
As a result, operability of the plug can be improved.
Further, since both the first bus bar and the second bus bar are extended so that their other ends are composed as the main body side terminals, a number of parts can be reduced and thus the cost can be lowered.
More concretely, it is preferable that at least one of the first bus bar and the second bus bar has a laminated structure that a plurality of thin electrically conductive plate materials are laminated.
According to this structure, since at least one of the first bus bar and the second bus bar is deflected freely in the direction crossing perpendicularly to the terminal fitting/detaching direction in order to provide the laminated structure that a plurality of thin electrically conductive plate materials are laminated, a predetermined deflection characteristic can be obtained easily and securely by changing a number of the thin electrically conductive plate materials.
In addition, it is preferable that in the apparatus main body and the plug, a pair of conduciveness detection-use terminals, which are fitted into and detached from each other according to fitting and detaching between the pair of main body side terminals and the plug side terminals, are provided respectively.
According to this structure, since the pair of conduciveness detection-use terminals on the apparatus main body side are fitted into and detached from the pair of conduciveness detection-use terminals on the plug side according to the fitting and detaching between the pair of main body side terminals and the pair of plug side terminals, the conductive and breaking states of the electric circuit can be detected easily and securely.


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patent: 11-176507-A (1999-07-01), None

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