Patent ID: 6877929

Claim:
A speed hump device, comprising: a housing device with a housing room therein having a first opening; a hump device with a hump member and an arc-shaped member pivoted on said housing device by a first pivot, wherein said hump member can be rotated in and out said housing room from said first opening about said first pivot, and the arc of said arc-shaped member is concentric with said first pivot, and said arc-shaped member has a first gear-teeth portion thereon; a gear set mounted in said housing device at least comprising a first gear and a second gear, wherein said first gear is engaged with said first gear-teeth portion, and when said hump device is rotated about said pivot, said first gear can be driven to rotate by said arc-shaped member to drive said second gear to rotate; a first sliding shaft having a second gear-teeth portion thereon and a first magnet mounted on one terminal of said first sliding shaft, wherein said second gear-teeth portion is engaged with said second gear; a second sliding shaft having a third gear-teeth portion thereon and a second magnet mounted on one terminal of said second sliding shaft, wherein said second magnet faces to and can attract said first magnet; an abutment member having a fourth gear-teeth portion pivoted in said housing device by a second pivot, wherein said fourth gear-teeth portion is engaged with said third gear-teeth portion, and when said second sliding shaft moves, it will drive said abutment member to rotate about said second pivot, wherein said abutment member is used to prevent said hump member from completely been depressing in said housing room when said first magnet is separated form said second magnet; and a rebound device mounted in said housing device used to push said hump device to let said hump member be out said housing room and to push said abutment member to be in the position to prevent said hump member from moving into said housing room, when no force from the outside of said housing room presses on said hump member.