Abstract A new and improved arrangement of a seat belt buckle mainly comprises a magnetic reed switch and a permanent magnet which are juxtaposed to each other in such a manner that the reed switch is subject to a magnetic field of the permanent magnet with a space provided therebetween. When, with this arrangement, the seat belt is attached to the vehicle occupant with a tongue plate thereof inserted into the space and automatically locked at the position by a locking means, the magnetic field established between the reed switch and the magnet is obstructed by the tongue plate situated therebetween so that the reed switch is actuated to open or close. In particular, the buckle according to the present invention may be arranged to dispose the reed switch in a circuit of any electrically constructed apparatus such as an acceleration switch.
A seat belt buckle for use in a motor vehicle, comprising a magnetic reed switch disposed in a circuit of electrically arranged apparatus; a permanent magnet juxtaposed to said magnetic reed switch with a space defined therebetween, a tongue plate of the seat belt being adapted to be inserted into said space; and a locking means to automatically lock said tongue plate in said space; whereby in accordance with attachment of the seat belt to a vehicle occupant, a magnetic field established between said magnetic reed switch and permanent magnet is obstructed by said tongue plate and said reed switch is opened or closed to actuate the electrically arranged apparatus.
Claim 2
Dependent Claim
110 words
A seat belt buckle for use in a motor vehicle, comprising a magnetic reed switch disposed in a circuit of electrically arranged apparatus; a permanent magnet juxtaposed to said magnetic reed switch with a space defined therebetween, a tongue plate of the seat belt being adapted to be inserted into said space; and a locking means to automatically lock said tongue plate in said space; whereby in accordance with attachment of the seat belt to a vehicle occupant, a magnetic field established between said magnetic reed switch and permanent magnet is obstructed by said tongue plate and said reed switch is opened or closed to actuate the electrically arranged apparatus.