Steering system
First Claim
1. A steering system that is capable of tilt adjustment, comprising:
- a steering shaft, to one end of which a steering member is coupled;
a tubular steering column that supports the steering shaft;
a first bracket that is fixed to a vehicle body and that includes a pair of first side plates;
a second bracket that is fixed to the steering column and that includes a pair of second side plates; and
a lock device that locks the steering column in position and that includes a tightening shaft inserted through tilt long grooves of the first side plates and insertion grooves of the second side plates, an operation lever that rotates together with the tightening shaft, and a pair of tightening members that include a pressing surface, that are supported by the tightening shaft to move in accompaniment with the tightening shaft and the steering column during tilt adjustment, and that tighten each of the first side plates to a corresponding one of the second side plates as the operation lever is operated to rotate in a lock direction, wherein;
the tilt long grooves each include a pair of longitudinal edge portions that extend in a tilt direction;
the lock device further includesa tongue piece unit that includes a support portion provided along at least one of the longitudinal edge portions of at least one of the first side plates, and a plurality of elastic tongue pieces supported in a cantilever manner by the support portion to extend from the support portion in a direction that is generally orthogonal to the tilt direction to form a row that extends in the tilt direction, the elastic tongue pieces being pressed by the pressing surface of the corresponding tightening member and warped when the steering column is locked, andpartitioning elements, between which a plurality of grooves are formed to house the elastic tongue pieces so as to be projectable, that are capable of restrict movement of the corresponding elastic tongue pieces in the tilt direction, and that are formed on an outer surface of the corresponding first side plate or a member held on the outer surface; and
when the steering column is locked, the pressing surface of the corresponding tightening member presses some of the elastic tongue pieces to retract the elastic tongue pieces into the grooves so that the corresponding tightening member is interposed between the elastic tongue pieces projecting from the grooves in the tilt direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A lock device of a steering system includes a tongue piece unit and a frame plate held on a first side plate. The tongue piece unit includes elastic tongue pieces supported in a cantilever manner by a vertical frame provided along at least one of longitudinal edge portions of at least one of first side plates to form a row that extends in a tilt direction. The frame plate includes partitioning portions, between which a plurality of grooves are formed to house the elastic tongue pieces so as to be projectable. When a steering column is locked, some of the elastic tongue pieces are pressed by a pressing surface of a tightening member to be retracted into grooves. Consequently, the tightening member is interposed between the elastic tongue pieces projecting from the grooves in the tilt direction.
33 Citations
20 Claims
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1. A steering system that is capable of tilt adjustment, comprising:
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a steering shaft, to one end of which a steering member is coupled; a tubular steering column that supports the steering shaft; a first bracket that is fixed to a vehicle body and that includes a pair of first side plates; a second bracket that is fixed to the steering column and that includes a pair of second side plates; and a lock device that locks the steering column in position and that includes a tightening shaft inserted through tilt long grooves of the first side plates and insertion grooves of the second side plates, an operation lever that rotates together with the tightening shaft, and a pair of tightening members that include a pressing surface, that are supported by the tightening shaft to move in accompaniment with the tightening shaft and the steering column during tilt adjustment, and that tighten each of the first side plates to a corresponding one of the second side plates as the operation lever is operated to rotate in a lock direction, wherein; the tilt long grooves each include a pair of longitudinal edge portions that extend in a tilt direction; the lock device further includes a tongue piece unit that includes a support portion provided along at least one of the longitudinal edge portions of at least one of the first side plates, and a plurality of elastic tongue pieces supported in a cantilever manner by the support portion to extend from the support portion in a direction that is generally orthogonal to the tilt direction to form a row that extends in the tilt direction, the elastic tongue pieces being pressed by the pressing surface of the corresponding tightening member and warped when the steering column is locked, and partitioning elements, between which a plurality of grooves are formed to house the elastic tongue pieces so as to be projectable, that are capable of restrict movement of the corresponding elastic tongue pieces in the tilt direction, and that are formed on an outer surface of the corresponding first side plate or a member held on the outer surface; and when the steering column is locked, the pressing surface of the corresponding tightening member presses some of the elastic tongue pieces to retract the elastic tongue pieces into the grooves so that the corresponding tightening member is interposed between the elastic tongue pieces projecting from the grooves in the tilt direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A steering system that is capable of telescopic adjustment, comprising:
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a steering shaft, to one end of which a steering member is coupled; a tubular steering column that supports the steering shaft; a first bracket that is fixed to a vehicle body and that includes a pair of first side plates; a second bracket that is fixed to the steering column and that includes a pair of second side plates; and a lock device that locks the steering column in position and that includes a tightening shaft inserted through insertion grooves of the first side plates and telescopic long grooves of the second side plates, an operation lever that rotates together with the tightening shaft, and a pair of tightening members that include a pressing surface, that are supported by the tightening shaft to move in accompaniment with the tightening shaft and the steering column during telescopic adjustment, and that tighten each of the first side plates to a corresponding one of the second side plates as the operation lever is operated to rotate in a lock direction, wherein; the telescopic long grooves each include a pair of longitudinal edge portions that extend in a telescopic direction; the lock device further includes a tongue piece unit that includes a support portion provided along at least one of the longitudinal edge portions of at least one of the second side plates, and a plurality of elastic tongue pieces supported in a cantilever manner by the support portion to extend from the support portion in a direction that is generally orthogonal to the telescopic direction to form a row that extends in the telescopic direction, the elastic tongue pieces being pressed by a pressing surface of the corresponding first side plate and warped when the steering column is locked, and partitioning elements, between which a plurality of grooves are formed to house the elastic tongue pieces so as to be projectable, that are capable of restrict movement of the corresponding elastic tongue pieces in the telescopic direction, and that are formed on an outer surface of the corresponding second side plate or a member held on the outer surface; and when the steering column is locked, the pressing surface of the corresponding first side plate presses some of the elastic tongue pieces to retract the elastic tongue pieces into the grooves so that the corresponding first side plate is interposed between the elastic tongue pieces projecting from the grooves in the telescopic direction. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification