Abstract: A steering system includes a column jacket that can extend and contract in an axial direction as a result of relative movement between an inner jacket and an outer jacket that houses the inner jacket, a regulation member fixed to the outer jacket and passing through an insertion hole in the inner jacket, and an elastic member fixed to the outer jacket. At the time of vehicular collision, when the regulation member is sheared by a peripheral portion of the insertion hole in the inner jacket in conjunction with the relative movement between the inner jacket and the outer jacket, a tip portion of the elastic member is fitted in the insertion hole.

Abstract: A steering system includes a column jacket including a lower jacket and an upper jacket; an engagement member; a retaining member; and a buffer member that is retained by the retaining member and contacts the engagement member in a contact direction at a time when the upper jacket is displaced to one sliding end. The retaining member includes a support surface that supports the buffer member; paired holding portions that are respectively disposed on both sides of the buffer member in a circumferential direction of the upper jacket and hold the buffer member toward the support surface; and a restriction portion configured to be engaged with an end of the butler member on a side toward which an opposite direction is directed, so as to restrict movement of the buffer member in the opposite direction, the opposite direction being opposite to the contact direction.

Abstract: A steering system includes an upper jacket that is movable in an axial direction, a first stopper member fixed to the upper jacket, and a second stopper member on a vehicle body. When a lock and unlock mechanism unlocks the upper jacket, the second stopper member moves to an advanced position where the second stopper member faces the first stopper member in the axial direction. When the lock and unlock mechanism locks the upper jacket, the second stopper member moves to a retracted position where the second stopper member retracts from the advanced position.

Abstract: When telescopic locking is released, a second tooth defining member interlocked with rotation of a clamping shaft via an interlocking mechanism (a driving member and a coupling shaft) acts to separate second teeth of the second tooth defining member from first teeth arranged in a column axial direction. At this time, the second teeth rotate in a circular-arc-like trajectory around a central axis of a support shaft, while the support shaft itself slides through a long groove formed in an outer jacket in the column axial direction. Thus, the movement trajectory of the second teeth during release of meshing engagement is in a direction approximately orthogonal to the column axial direction (the direction in which the first teeth are arranged).

Abstract: An outer jacket externally fitted over an inner jacket so as to be slidable in an axial direction relative to the inner jacket has a slit extending straight from an opening formed at a jacket end. A recessed portion is formed at an inner edge of the slit such that a slit width at an inside diameter portion of the outer jacket is larger than a slit width at an outside diameter portion of the outer jacket. An amount of recess of the recessed portion in a circumferential direction of the outer jacket continuously decreases from the opening end to an area end.

Abstract: A second tooth defining member includes a first portion rotatably supported around a support so as to be movable in the column axial direction and a second portion defining second teeth coming into meshing engagement with first teeth moving together with an upper jacket. A guide mechanism guides the second portion in an inclination direction inclined with respect to an orthogonal direction orthogonal to the column axial direction. The guide mechanism includes a guide shaft supported by the lower jacket, and a guide hole that is slot formed in the second portion and extending in the inclination direction. The guide hole has a first end and a second end. The second end of the guide hole is arranged farther from the second teeth than the first end and above the first end in the column axial direction.

Abstract: When telescopic locking is released, a second tooth defining member operating in conjunction with rotation of a clamping shaft acts to separate second teeth of the second tooth defining member from first teeth arranged in a column axial direction. At this time, a second portion of the second tooth defining member on which the second teeth are formed is guided by a second guide mechanism in an orthogonal direction orthogonal to the column axial direction to release meshing engagement between the first teeth and the second teeth. A first portion of the second tooth defining member that is supported so as to be rotatable around a support is guided in a column axial direction by a first guide mechanism so as not to hinder operation of the second guide mechanism.

Abstract: A steering system includes an engaged member fixed to an upper jacket, an engaging member rotatably supported by a lower jacket, and an impact absorbing member including a movable portion that moves together with the engaging member at the time of a secondary collision, to absorb impact made at the time of the secondary collision. The engaged member has a plurality of engaged teeth. The engaging member comes into engagement with the engaged teeth in accordance with an operation of an operation member. At the time of the secondary collision, the engaging member is disengaged from the lower jacket, and moves along with the upper jacket while in engagement with the engaged teeth.

Abstract: A steering system includes an outer jacket including a pair of clamped portions disposed on both sides of a slit, an inner jacket coated with an insulating coating layer all along an outer periphery of the inner jacket except for a predetermined area, an upper bracket that supports the clamped portions and that is fixed to a vehicle body, and a clamping mechanism including a clamping shaft that is supported in clamping shaft insertion holes in the clamped portions so as to be energized. The steering system further includes a conductive elastic member including a first portion engaged with one of a slit inside portion of the clamping shaft positioned in the slit and the predetermined area so as to be energized and a second portion that slide-contacts the other of the slit inside portion and the predetermined area.

Abstract: In a steering system, a pair of first tooth rows that is movable integrally with an upper jacket includes first teeth each of which has a tooth trace extending in an up-down direction Z and which is arranged at a pitch in an axial direction. A tooth member shaped by compression molding includes a pair of second teeth provided on respective side surfaces of a pair of side surfaces of a body portion supported by a lower jacket, the side surfaces extending parallel to each other. The second teeth mesh with the respective first tooth rows in accordance with operation of an operation member that regulates extension and contraction of a column jacket. The second teeth have tooth tips displaced from each other by a distance shorter than a predetermined pitch.

Abstract: A steering device includes: a rotary shaft supported by an upper bracket; a plurality of engaged teeth fixed to an upper jacket; a lock member including engaging teeth to mesh with the engaged teeth; and a support shaft supported by a lower jacket at a position farther away from the engaged teeth than the rotary shaft 35. When the rotary shaft is rotated, a first rotary member is rotated in synchronization with the rotary shaft. A second rotary member moves the lock member to a disengaged position in conjunction with rotation of the first rotary member. The lock member is urged toward a meshing position by an urging member.

Abstract: A fulcrum formation member forming a fulcrum and a first spring engagement portion are provided in a bracket. A lever link that swings about the fulcrum includes a second spring engagement portion forming a point of load, and an elongated hole in which a fastening shaft is fitted so as to be movable in a longitudinal direction in association with tilt adjustment. A point of effort is located at the edge of the elongated hole. One end of a spring member (biasing member) engages with the first spring engagement portion, and the other end thereof engages with the second spring engagement portion. The spring member biases a column jacket toward the upper side in a tilt direction via the lever link and the fastening shaft.

Abstract: When telescopic locking is released, a second tooth defining member interlocked with rotation of a clamping shaft via an interlocking mechanism (a driving member and a coupling shaft) acts to separate second teeth of the second tooth defining member from first teeth arranged in a column axial direction. At this time, the second teeth rotate in a circular-arc-like trajectory around a central axis of a support shaft, while the support shaft itself slides through a long groove formed in an outer jacket in the column axial direction. Thus, the movement trajectory of the second teeth during release of meshing engagement is in a direction approximately orthogonal to the column axial direction (the direction in which the first teeth are arranged).

Abstract: When telescopic locking is released, a second tooth defining member operating in conjunction with rotation of a clamping shaft acts to separate second teeth of the second tooth defining member from first teeth arranged in a column axial direction. At this time, a second portion of the second tooth defining member on which the second teeth are formed is guided by a second guide mechanism in an orthogonal direction orthogonal to the column axial direction to release meshing engagement between the first teeth and the second teeth. A first portion of the second tooth defining member that is supported so as to be rotatable around a support is guided in a column axial direction by a first guide mechanism so as not to hinder operation of the second guide mechanism.

Abstract: A second tooth defining member includes a first portion rotatably supported around a support so as to be movable in the column axial direction and a second portion defining second teeth coming into meshing engagement with first teeth moving together with an upper jacket. A guide mechanism guides the second portion in an inclination direction inclined with respect to an orthogonal direction orthogonal to the column axial direction. The guide mechanism includes a guide shaft supported by the lower jacket, and a guide hole that is slot formed in the second portion and extending in the inclination direction. The guide hole has a first end and a second end. The second end of the guide hole is arranged farther from the second teeth than the first end and above the first end in the column axial direction.

Abstract: A steering system includes a second tooth defining member and an energy absorbing unit. The energy absorbing unit includes energy absorbing portions each including a first portion extending upward in a column axial direction from a restraining portion restrained in the column axial direction and a second portion formed by folding back the energy absorbing portion at a fold-back portion, the energy absorbing portions being separated from each other in a first orthogonal direction, and a coupling portion that couples the second portions together and moves together with the second tooth defining member at the time of the secondary collision. At the time of the secondary collision, the energy absorbing portions allow the fold-back portions to move downward in the column axial direction to absorb impact energy while guiding downward movement of the second tooth defining member in the column axial direction between facing edges of the energy absorbing portions.

Abstract: A steering system includes an outer jacket including a pair of clamped portions disposed on both sides of a slit, an inner jacket coated with an insulating coating layer all along an outer periphery of the inner jacket except for a predetermined area, an upper bracket that supports the clamped portions and that is fixed to a vehicle body, and a clamping mechanism including a clamping shaft that is supported in clamping shaft insertion holes in the clamped portions so as to be energized. The steering system further includes a conductive elastic member including a first portion engaged with one of a slit inside portion of the clamping shaft positioned in the slit and the predetermined area so as to be energized and a second portion that slide-contacts the other of the slit inside portion and the predetermined area.

Abstract: A steering system includes an engaged member fixed to an upper jacket, an engaging member rotatably supported by a lower jacket, and an impact absorbing member including a movable portion that moves together with the engaging member at the time of a secondary collision, to absorb impact made at the time of the secondary collision. The engaged member has a plurality of engaged teeth. The engaging member comes into engagement with the engaged teeth in accordance with an operation of an operation member. At the time of the secondary collision, the engaging member is disengaged from the lower jacket, and moves along with the upper jacket while in engagement with the engaged teeth.

Abstract: An outer jacket externally fitted over an inner jacket so as to be slidable in an axial direction relative to the inner jacket has a slit extending straight from an opening formed at a jacket end. A recessed portion is formed at an inner edge of the slit such that a slit width at an inside diameter portion of the outer jacket is larger than a slit width at an outside diameter portion of the outer jacket. An amount of recess of the recessed portion in a circumferential direction of the outer jacket continuously decreases from the opening end to an area end.

Abstract: A steering system includes an upper jacket that is movable in an axial direction, a first stopper member fixed to the upper jacket, and a second stopper member on a vehicle body. When a lock and unlock mechanism unlocks the upper jacket, the second stopper member moves to an advanced position where the second stopper member faces the first stopper member in the axial direction. When the lock and unlock mechanism locks the upper jacket, the second stopper member moves to a retracted position where the second stopper member retracts from the advanced position.