Pressure actuated circuit breaker with frangible printed circuit board
First Claim
1. A pressure actuated breaker comprising:
- a box formed of an insulating material and defining an opening;
a pressure receiving member disposed to cover the opening of said box, the pressure receiving member being formed from a flexible material such that the pressure receiving member is deformed inwardly into the box by external pressure;
an operating member having a higher rigidity than said pressure receiving member and being located inside of the box adjacent the pressure receiving member such that the operating member is pressed away from the opening by said deformation of said pressure receiving member; and
a breakable member contained in said box, said breakable member including a substrate and a conductive path formed on the substrate, said substrate being formed from a breakable material and being supported in said box such that when the breakable member is pressed by said operating member with a force exceeding a predetermined value, the substrate is cracked, thereby breaking said conductive path.
1 Assignment
0 Petitions
Accused Products
Abstract
A pressure actuated breaker for cutting-off current flow in and from a battery in response to a relatively low internal pressure rise within the battery. The pressure cut-off sensor includes a box having an opening and being formed of an insulating material, a bendable packing for covering the opening and which is deformed into the box by external pressure, an actuator having a higher elasticity than the packing and being pressed by the deformation of the packing, and a breakable element supported in the box, the breakable member including a substrate and a conductive path formed on the substrate. When pressure within the battery exceeds a predetermined amount, the packing is pressed inward into the box, thereby pressing the actuator against the breakable member such that the substrate is cracked, thereby breaking the conductive path.
21 Citations
11 Claims
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1. A pressure actuated breaker comprising:
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a box formed of an insulating material and defining an opening; a pressure receiving member disposed to cover the opening of said box, the pressure receiving member being formed from a flexible material such that the pressure receiving member is deformed inwardly into the box by external pressure; an operating member having a higher rigidity than said pressure receiving member and being located inside of the box adjacent the pressure receiving member such that the operating member is pressed away from the opening by said deformation of said pressure receiving member; and a breakable member contained in said box, said breakable member including a substrate and a conductive path formed on the substrate, said substrate being formed from a breakable material and being supported in said box such that when the breakable member is pressed by said operating member with a force exceeding a predetermined value, the substrate is cracked, thereby breaking said conductive path. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A pressure actuated breaker comprising:
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a box formed of an insulating material and defining an opening; a pressure receiving member disposed to cover the opening of said box, the pressure receiving member being formed from a flexible material such that the pressure receiving member is deformed inwardly into the box by external pressure; a breakable member contained in said box, said breakable member including a substrate and a conductive path formed on the substrate, said substrate being formed from a breakable material and being supported in said box such that when the breakable member is pressed by the pressure receiving member with a force exceeding a predetermined value, the substrate is cracked, thereby breaking said conductive path; a pair of connecting members having conductivity connected to said conductive path; and a pair of terminals joined to said connecting members within said box and being insert-molded to said box, wherein said box is provided with a depression extending to the back of terminals of the joining portion between said connecting members and said terminals. - View Dependent Claims (9)
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10. A pressure actuated breaker comprising:
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a box formed of an insulating material and defining an opening; a pressure receiving member for closing the opening of said box and being deformed by pressure; a breakable member contained in said box, said breakable member comprising a substrate having a conductive path formed on a surface thereof, said conductive path having an elongation modulus, the substrate being formed from a material having a smaller elongation modulus than that of said conductive path, and a coating member formed integrally on said conductive path and being formed from a material having a smaller elongation modulus than that of said conductive path, said substrate being supported in said box such that when the breakable member is pressed by the pressure receiving member with a force exceeding a predetermined value, the substrate is cracked, thereby breaking said conductive path; and a pair of connecting terminals in conduction with said conductive path and being extended outside of said box. - View Dependent Claims (11)
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Specification