Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electrical power distribution systems and devices
Reexamination Certificate
2000-01-19
2001-12-25
Picard, Leo P. (Department: 2836)
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
06333845
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 an 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. 8 and 9
is suggested.
As shown in
FIGS. 8 and 9
, 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 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. 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 parallel with the first bus bar so as to be composed as the other terminal of the pair of main body side terminals. Respective terminal insertion widths of the pair of plug side terminals are wider than the corresponding widths of the pair of main body side terminals. When the plug moves in the fitting/detaching direction, the pair of plug side terminals are freely fitted into and detached from the pair of main body side terminals.
In this structure, if an error such as mounting looseness occurs when the one end of the second bus bar is fixed to an electrode fixing section, a displacement due to the error occurs in a widthwise direction of the main body side terminal of the second bus bar. Since the width of the terminal insertion portion of the plug side terminal is large, the mounting error of the second bus bar can be absorbed.
Therefore, a fitting/detaching force between the main body side terminals and the plug side terminals can be approximately constant.
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.
In addition, it is suitable for convenience in the structure that the pair of plug side terminals are formed by one plate member.
In addition, a pair of conduciveness detection-use terminals for detecting the conductive state of the electric circuit may be provided in the apparatus main body and the plug.
According to this structure, the conductive and breaking states of the electric circuit can be detected easily and securely.
In addition, the plug may have a plug main body and a slider which is movable in the terminal fitting/detaching direction with respect to the plug main body.
According to this structure, connection between the main body side terminals and the plug side terminals can be secured.
More specifically, in the case where the plug main body is not fitted to the terminal fit completing position of the apparatus main body, the plug main body is not engaged with the slider. For this reason, even if the slider of the plug is tried to be moved in the terminal fitting direction with respect to the plug main body, the plug cannot be moved. As a result, an operator can know that the plug main body is in the middle of the fitting, and thus the incomplete fitting of the plug into the apparatus main body can be prevented previously.
More concretely, it is more preferable that the pair of plug side terminals are provided to the plug main body, and the pair of conduciveness detection-use terminals of the plug are provided to the slider.
According to this structure, the conductive and breaking states of the electric circuit can be detected more easily and securely by the simple structure.
In addition, it is preferable that the plug main body is freely engaged and detached according to a movement of the slider in the fitting/detaching direction in order to secure this operation.
In addition, it is preferable that fitting/detaching timing of the pair of plug side terminals and the pair of main body side terminals differs from timing of the pair of conduciveness detection-use terminals of the apparatus main body and the pair of conduciveness detection-use terminals of the plug.
According to this structure, a difference of time is set in the fitting/detaching timing of the pair of main body side terminals and the pair of plug side terminals so that the pair of conduciveness detection-use terminals on the apparatus main body side can be fitted into and detached from the pair of conduciveness detection-use terminals on the slider side of the plug. As a result, an influence of a residual electric current can be suppressed efficiently.
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patent: 0411216-
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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