Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electrical power distribution systems and devices
Reexamination Certificate
2000-01-19
2001-12-04
Picard, Leo P. (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
06327140
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. 7 and 8
is suggested.
As shown in
FIGS. 7 and 8
, 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 transpiration 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 pair of main body side terminals, 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 pair of main body side terminals are supported in the apparatus main body movably in a direction crossing substantially perpendicularly to a fitting/detaching direction, and one of the pair of main body side terminals is connected with the power supply, and the other terminal is connected with the load. Moreover, 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 the pitch of the pair of main body side terminals differs from the pitch of the pair of plug side terminals, the pair of main body side terminals are movable in the direction crossing perpendicularly to the terminal fitting/detaching direction, and the pair of the main body side terminals move so as to accord with the pitch of the pair of plug side terminals. As a result, the difference of pitches can be absorbed securely, and a fitting/detaching force between both the terminals can be approximately constant.
As a result, operability of the plug can be improved efficiently.
In addition, the pair of the main body side terminals can be connected respectively with electric wires which move freely.
The fuse is provided between one of the pair of the main body side terminals and the power supply.
In addition, the power-supply breaker apparatus can be structured that an operation lever is provided and it is supported rotatively to the apparatus main body, and the plug is movable in the fitting direction of the terminal fitting/detaching direction by operating the operation lever.
According to this structure, since the plug can be moved in the terminal fitting direction by operating the operation lever, the operability of the plug can be further improved.
In addition, it is preferable that the pair of main body side terminals are formed by substantially cylindrical female terminals and the pair of plug side terminals are formed by round pin shaped male terminals.
According to this structure, since the main body side terminals are composed of the substantially cylindrical female terminals for general purpose, the cost can be lowered, and a maintenance performance can be securely improved.
In addition, it is preferable that a rectangular projected surface is provided to the plug, and the pair of plug side terminals are positioned on a diagonal line of the projected surface.
According to this structure, since an area of the terminal projected surface of the plug can be small, the plug and the whole apparatus can be further miniaturized.
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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Hashizawa Shigemi
Karamatsu Masayuki
Kuboshima Hidehiko
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Picard Leo P.
Vortman Anatoly
Yazaki -Corporation
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