Seat belt buckle system
A seat belt buckle ( 1 ) and a belt tongue ( 2 ) which can be inserted into the seat belt buckle ( 1 ). An RFID responder ( 3 ) is arranged in or on the belt tongue ( 2 ) and an RFID reading unit ( 4 ) is arranged in the seat belt buckle ( 1 ) and is designed in such a way that a coupling between the RFID reading unit ( 4 ) and the RFID transponder ( 3 ) is only possible if the belt tongue ( 2 ) is inserted into the seat belt buckle ( 1 ).
1. A seat belt buckle system comprising, a seat belt buckle and a belt tongue inserted into the seat belt buckle in an inserted state, wherein an RFID transponder is arranged in or on the belt tongue and an RFID reading unit is arranged in the seat belt buckle, wherein the RFID transponder is arranged inside a blind hole with an opening formed in a metal plate of the belt tongue, and wherein radiation emitted by the RFID transponder is directed to the opening of the blind hole faced to the RFID reading unit of the seat belt buckle defined as a predetermined orientation of the belt tongue such that the RFID reading unit and the RFID transponder are coupled when the belt tongue is inserted into the seatbelt buckle in the predetermined orientation, and wherein the coupling between the RFID reading unit and the RFID transponder is possible at a distance between the RFID reading unit and the RFID transponder of up to 3 cm.
2. The seat belt buckle system according to claim 1 , wherein the RFID transponder is arranged in or on a section of the belt tongue which can be inserted into the seat belt buckle in the inserted state.
3. The seat belt buckle system according to claim 2 , wherein the RFID transponder is arranged in or on a section of a plastic overmold of the belt tongue which, in the inserted state, extends into the seat belt buckle.
4. A seat belt buckle system comprising, a seat belt buckle and a belt tongue inserted into the seat belt buckle in an inserted state, wherein an RFID transponder is arranged in or on the belt tongue and an RFID reading unit is arranged in the seat belt buckle, and the RFID reading unit and the RFID transponder coupled when the belt tongue is inserted into the seat belt buckle in a single orientation, wherein the RFID transponder is embedded in a separate plastic housing formed with a latching connection such that the plastic housing having the RFID transponder is connected to a metal plate of the belt tongue in a force-fitting or a positive-locking manner, and wherein the plastic housing having the RFID transponder is mounted to the metal plate of the belt tongue and the RFID transponder is spaced apart from the metal plate, and wherein the coupling between the RFID reading unit and the RFID transponder is possible at a distance between the RFID reading unit and the RFID transponder of up to 3 cm.
5. The seat belt buckle system according to claim 4 , wherein the plastic housing is at least partially overmolded by a plastic overmold of the belt tongue.
6. The seat belt buckle system according to claim 1 , wherein the seat belt buckle is designed in such a way that the radiation emitted by the RFID transponder is at least attenuated in at least one direction so that a coupling between the RFID transponder and the RFID reading unit is not possible when the belt tongue is not in the inserted state in the predetermined orientation.
7. The seat belt buckle system according to claim 6 , wherein at least one shielding plate is arranged in the seat belt buckle.
8. The seat belt buckle system according to claim 1 , wherein the RFID reading unit outputs a discrete signal when coupled with the RFID transponder.
9. The seat belt buckle system according to claim 1 , wherein the RFID reading unit is connected to a vehicle BUS system.
10. The seat belt buckle system according to claim 1 , wherein no additional switch or sensor is provided for detecting the belt tongue inserted into the seat belt buckle.
11. The seat belt buckle system according to claim 4 , wherein the separate plastic housing is configured for spacing the RFID transponder apart from the metal plate.