Abstract:
PROBLEM TO BE SOLVED: To provide an overcurrent shut-off apparatus capable of performing a highly accurate overcurrent shut-off, and an overcurrent detection element used for the same.SOLUTION: An overcurrent shut-off apparatus 10 includes: a heating part 21 disposed in series in a path from a battery B of a vehicle to a motor M via a wire; and a thermosensitive part 24 having characteristics corresponding to a temperature given by the heating part 21. The overcurrent shut-off apparatus 10 shuts off an overcurrent by operating a switching element 13 based on a signal corresponding to a temperature obtained from the thermosensitive part 24, and includes an overcurrent detection element 20 in which the heating part 21 and the thermosensitive part 24 are covered integrally by a resin molding part 30.
Abstract:
PURPOSE:To form an inductance element without going through a heating process by forming an insulating coil into an inductance element directly on an insulating substrate with a supersonic bonding device after soldering other circuit elements. CONSTITUTION:After conductive routes 2 and 2' are formed on a circuit substrate 1 and a desired circuit element 3 is soldered, a bobbin 5 is arranged on the circuit substrate 1. An end of a coil 7 is supersonically bonded on the conductive route 2 of the substrate 1 with a supersonic bonding device, the insulating coil 7 is wound on a bobbin 5 through revolving the circuit substrate 1, and another end of the insulating coil 7 is supersonically bonded to another conductive route 2'. As, thus, an inductance element can be built in on the circuit substrate 1 besides an IC, a transistor, a chip condenser o a circuit element 3 of chip resistance, external parts can be almost unnecessary, the inductance element is built in after a heating process of soldering, a short circuit never occurs because of heating the insulating coil 7.
Abstract:
PURPOSE:To obtain the inductance elements of extremely small size and low price and to form the elements in an arbitrary position of an insulating substrate continuously by forming the elements on the insulating substrate directly by use of a supersonic bonding device of insulating wires. CONSTITUTION:After a copper foil is stuck to the overall surface of one of the main planes of an insulating substrate 1, the copper foil is etched selectively to form the conductive paths of desired pattern. A winding frame body 3 is placed and fixed on the insulating substrate 1 with being close to the conductive paths by an adhesive 4. The winding frame body 3 has a function of winding the wire for forming an inductance element. One end of a wire 5 is supersonic- bonded on one of the conductive paths 2 by use of a supersonic bonding device. The insulating wire 5 is wound on the winding frame body 3 by providing a capillary chip 9 around the body 3. During this process, the insulating wire 5 is wound on the body 3 only by the predetermined number of tuns in one direction into a coil from thereby obtaining the inductance element of desired value.