초록 ▼

A tension sensor (10) for a vehicle seatbelt (12) comprises a base (14) having a pair of guide pin blocks (16) and (18) depending therefrom, and a plurality of spaced upper and lower guide pins, 20 and 22 respectively, for guiding the seatbelt (12). A plunger housing (30) having an orifice (32) ther

A tension sensor (10) for a vehicle seatbelt (12) comprises a base (14) having a pair of guide pin blocks (16) and (18) depending therefrom, and a plurality of spaced upper and lower guide pins, 20 and 22 respectively, for guiding the seatbelt (12). A plunger housing (30) having an orifice (32) therein for acceptance of a movable plunger (40) is secured to the base (14). The plunger (40) has an upper portion (42) shaped to allow the seatbelt (12) to travel over the plunger (40) with minimal friction. A plurality of springs (46) are disposed between the base (14) and the plunger (40) to bias the plunger (40) against the lateral force of the seatbelt (12) when under tension. A permanent magnet (50) secured to the plunger moves into close proximity to a Hall effect sensor (52) when the plunger (40) is depressed by the seatbelt (12). The Hall effect sensor (52) has an output (54) responsive to the magnetic flux therein.

대표청구항 ▼

[I claim:] [1.]a base having first and second opposed guide pin blocks depending therefrom;a plurality of spaced upper guide pins secured to and extending between the opposed guide pin blocks;a plurality of spaced lower guide pins secured to and extending between the opposed guide pin blocks in spac

[I claim:] [1.]a base having first and second opposed guide pin blocks depending therefrom;a plurality of spaced upper guide pins secured to and extending between the opposed guide pin blocks;a plurality of spaced lower guide pins secured to and extending between the opposed guide pin blocks in spaced relation to said plurality of upper guide pins;a plunger housing secured to said base having a plunger orifice and a plurality of detent slots therein;a plunger disposed within the plunger orifice of said plunger housing having an upper portion shaped to allow said seatbelt to move thereacross and having a plurality of detents depending therefrom wherein the detents engage the detent slots of said plunger housing;a plurality of springs disposed between said plunger and said base for biasing said plunger toward said upper guide pins;a permanent magnet secured at a point to said plunger; anda Hall effect sensor secured to said housing at a point wherein the magnetic flux of said permanent magnet varies through said Hall effect sensor when said plunger is biased toward said base, said Hall effect sensor having an output responsive to the magnetic flux therein.