Breaker, safety circuit and secondary battery pack
AssigneeBourns, Inc.
InventorMasaki Yoshioka
Life of this patent
Estimating the term…
Abstract
The breaker comprises a fixed piece, a movable piece, a thermally-actuated element and a resin case. The fixed piece has an embedded portion embedded in the resin case in a region that overlaps with the thermally-actuated element in a plan view viewed in the thickness direction. The resin case has: an outer peripheral portion formed on the outer perimeter of a recessed portion; a first penetrating portion penetrating the recessed portion to expose the embedded portion to the thermally-actuated element side; an island portion interposed between the fixed piece and the thermally-actuated element in the inside of the first through portion; and a connecting portion connecting between the outer peripheral portion and the island portion.
Claims16
A breaker comprising:
- a fixed piece which has a fixed contact;
- a movable piece which has an elastic portion being elastically deformable, and a movable contact in one end portion of the elastic portion, and which presses the movable contact so as to contact with the fixed contact;
- a thermally-actuated element which is deformed in response to temperature changes so as to shift the movable piece from a conductive state in which the movable contact contacts with the fixed contact to a cut-off state in which the movable contact is separated from the fixed contact;
- and
- a resin case which has a recessed portion for accommodating the thermally-actuated element,
- wherein
- the fixed piece has an embedded portion which is embedded in the resin case in a region which, in a plan view viewed in a thickness direction of the fixed piece, overlaps with the thermally-actuated element, and
- the resin case has
- an outer peripheral portion which is formed on the outer perimeter of the recessed portion,
- a first penetrating portion which penetrates the recessed portion so as to expose the embedded portion to a thermally-actuated element side, and
- an island portion which is, in an inside of the first penetrating portion, interposed between the fixed piece and the thermally-actuated element, and
- a connecting portion which connects between the outer peripheral portion and the island portion.
A breaker comprising:
- a fixed piece which has a fixed contact;
- a movable piece which has an elastic portion being elastically deformable, and a movable contact in one end portion of the elastic portion, and which presses the movable contact so as to contact with the fixed contact;
- a thermally-actuated element which is deformed in response to temperature changes so as to shift the movable piece from a conductive state in which the movable contact contacts with the fixed contact to a cut-off state in which the movable contact is separated from the fixed contact;
- and
- a resin case which has a recessed portion for accommodating the thermally-actuated element,
- wherein
- the fixed piece has an embedded portion which is embedded in the resin case in a region which, in a plan view viewed in a thickness direction of the fixed piece, overlaps with the thermally-actuated element, and
- the resin case has
- an outer peripheral portion which is formed on the outer perimeter of the recessed portion,
- a first penetrating portion which penetrates the recessed portion so as to expose the embedded portion to a thermally-actuated element side, and
- an island portion which is, in an inside of the first penetrating portion, interposed between the fixed piece and the thermally-actuated element,
- a bottom portion which covers a bottom surface of the fixed piece, and
- a window portion which penetrates the bottom portion and exposes the bottom surface.
Dependencies are inferred from the claim text.