Abstract: A steering device including a steering column supporting a steering shaft to be coupled to a steering wheel. The steering column is sandwiched between a bracket including a first support plate and a second support plate with a tightening shaft penetrating the first support plate and the second support plate and including a male thread at an end of the tightening shaft on a side close to the second support plate having a nut attached thereon. An operation lever is disposed between the nut and the second support plate and penetrated by the tightening shaft. A case including a bottom surface facing an end surface of the tightening shaft is attached to the operation lever, and a coil spring coming into contact with the bottom surface and the tightening shaft.

Abstract: A steering device including a steering column supporting a steering shaft to be coupled to a steering wheel. The steering column is sandwiched between a bracket including a first support plate and a second support plate with a tightening shaft penetrating the first support plate and the second support plate and including a male thread at an end of the tightening shaft on a side close to the second support plate having a nut attached thereon. An operation lever is disposed between the nut and the second support plate and penetrated by the tightening shaft. A case including a bottom surface facing an end surface of the tightening shaft is attached to the operation lever, and a coil spring coming into contact with the bottom surface and the tightening shaft.

Abstract: At least one of the vehicle body side through holes and the column side through hole is an adjusting long hole which is long in a direction in which a position of the steering wheel can be adjusted. A base end portion of the adjusting lever includes a lever side through hole penetrating through the base end portion in the width direction. The adjusting rod is press-fitted into the lever side through hole.

Abstract: An upper surface of a front portion of an outer column is provided with a slit having a substantial T shape as seen from a radial direction and a pair of sandwiched portions. In a rear end side portion of an outer surface of the sandwiched portion, a dented portion is formed to be dented inward in a width direction at a lower half portion thereof. Accordingly, a distance from the position of a force which acts on the sandwiched portions according to an operation on an adjustment lever to a position of a main outer column body which is a fulcrum of elastic deformation becomes longer. Therefore, a structure capable of reducing change of a force necessary for operating the adjustment lever and stably fitting and holding an inner column regardless of the position of a steering wheel in a front-rear direction is implemented.

Abstract: At least one of the vehicle body side through holes and the column side through hole is an adjusting long hole which is long in a direction in which a position of the steering wheel can be adjusted. A base end portion of the adjusting lever includes a lever side through hole penetrating through the base end portion in the width direction. The adjusting rod is press-fitted into the lever side through hole.

Abstract: In a position adjustment device of a steering wheel, a step forming surface is provided in a portion close to one axial end of an adjustment rod. A nut is threadedly fixed to one end portion of the adjustment rod in the axial direction. An adjustment lever is connected to a driving cam of a cam mechanism. The driving cam is sandwiched between the step forming surface and the nut.

Abstract: An upper surface of a front portion of an outer column is provided with a slit having a substantial T shape as seen from a radial direction and a pair of sandwiched portions. In a rear end side portion of an outer surface of the sandwiched portion, a dented portion is formed to be dented inward in a width direction at a lower half portion thereof. Accordingly, a distance from the position of a force which acts on the sandwiched portions according to an operation on an adjustment lever to a position of a main outer column body which is a fulcrum of elastic deformation becomes longer. Therefore, a structure capable of reducing change of a force necessary for operating the adjustment lever and stably fitting and holding an inner column regardless of the position of a steering wheel in a front-rear direction is implemented.

Abstract: Provided is a telescopic shaft having a coated section that reduces sliding resistance, with fluctuation of the sliding resistance according to sliding position of the telescopic shaft being reduced. A female shaft 16B is fitted onto a male shaft in a state of interference, and by causing the male shaft 16A to slide back-and-forth a specified number of times in the axial direction with respect to the female shaft 16B while applying, for example, a load in a direction that bends the male shaft 16A with respect to the female shaft 16B, friction heat is generated between side surfaces 411 of grooves 41 in the female shaft 16B and the coated section 61, which heats the coated section 61 and causes the coated section 61 to expand along the entire length in the axial direction of teeth 51 of the male shaft 16A. Therefore, the coated section 61 plastically deforms along the entire length in the axial direction of the teeth causing compressive strain to occur.

Abstract: In a position adjustment device of a steering wheel, a step forming surface is provided in a portion close to one axial end of an adjustment rod. A nut is threadedly fixed to one end portion of the adjustment rod in the axial direction. An adjustment lever is connected to a driving cam of a cam mechanism. The driving cam is sandwiched between the step forming surface and the nut.

Abstract: A steering-column apparatus minimizes the force required for expanding or contracting the portion where an inner column fits and is supported and improves the ease of operation for adjusting the position of a steering wheel. A split is provided in the bottom surface of the front section of an outer column includes a main slit section in the axial direction and a sub slit section in the circumferential direction, with the front-end section of the main slit section being open on the edge on the rear side thereof. The length from the main slit section to one end section in the circumferential direction of both end sections in the circumferential direction of the sub slit section, is longer than the length from the main slit section to the other end section in the circumferential direction.

Abstract: Construction is achieved that, when performing operation in order to maintain the position of a steering wheel after adjustment, is capable of reducing the operation torque that is applied to an adjustment lever 14 during the first half of the operation, and is capable of improving operability. Portions (virtual sliding-contact section lines M) of the drive-side cam surfaces 20a that can come in sliding contact with the driven-side continuous surfaces 24a when moving from a state in which the position of the steering wheel can be adjusted to a state in which the adjusted position can be maintained, are inclined toward one side in the circumferential direction at the time when the virtual sliding-contact section lines M overlap one end N1 in the circumferential direction of the driven-side continuous surfaces 24a.

Abstract: Construction of a steering-column apparatus is achieved that is capable of keeping the force required for expanding or contracting the portion 33 where an inner column 10a fits and is supported small, and improves the ease of operation for adjusting the position of a steering wheel 4. A split 19a that is provided in the bottom surface of the front section of an outer column 11a comprises: a main slit section 36 that extends in the axial direction; and a sub slit section 37 that is formed in the circumferential direction of the front-end section of the main slit section 36, with the front-end section of the main slit section 37 being open on the edge on the rear side thereof.

Abstract: Construction is achieved that, when performing operation in order to maintain the position of a steering wheel after adjustment, is capable of reducing the operation torque that is applied to an adjustment lever 14 during the first half of the operation, and is capable of improving operability. Portions (virtual sliding-contact section lines M) of the drive-side cam surfaces 20a that can come in sliding contact with the driven-side continuous surfaces 24a when moving from a state in which the position of the steering wheel can be adjusted to a state in which the adjusted position can be maintained, are inclined toward one side in the circumferential direction at the time when the virtual sliding-contact section lines M overlap one end N1 in the circumferential direction of the driven-side continuous surfaces 24a.

Abstract: Construction is achieved capable of stably maintaining an inner column 43 on the inner diameter side of an outer column 42. The outer column 42, including a support section 46 is formed by using hydroforming to swell a hollow tube outward in the radial direction. A displacement bracket 34 is also integrally formed with the outer column 42 by tube swelling. Furthermore, raised sections 47a, 47b of the support section 46 are formed at three or more location in the circumferential direction on the inner circumferential surface of the outer column 42, and these raised sections 47a, 47b and the outer circumferential surface of the inner column 43 come in contact with each other at three or more locations in the circumferential direction.

Abstract: Provided is a telescopic shaft having a coated section that reduces sliding resistance, with fluctuation of the sliding resistance according to sliding position of the telescopic shaft being reduced. A female shaft 16B is fitted onto a male shaft in a state of interference, and by causing the male shaft 16A to slide back-and-forth a specified number of times in the axial direction with respect to the female shaft 16B while applying, for example, a load in a direction that bends the male shaft 16A with respect to the female shaft 16B, friction heat is generated between side surfaces 411 of grooves 41 in the female shaft 16B and the coated section 61, which heats the coated section 61 and causes the coated section 61 to expand along the entire length in the axial direction of teeth 51 of the male shaft 16A. Therefore, the coated section 61 plastically deforms along the entire length in the axial direction of the teeth causing compressive strain to occur.

Abstract: Construction is achieved capable of stably maintaining an inner column 43 on the inner diameter side of an outer column 42. The outer column 42, including a support section 46 is formed by using hydroforming to swell a hollow tube outward in the radial direction. A displacement bracket 34 is also integrally formed with the outer column 42 by tube swelling. Furthermore, raised sections 47a, 47b of the support section 46 are formed at three or more location in the circumferential direction on the inner circumferential surface of the outer column 42, and these raised sections 47a, 47b and the outer circumferential surface of the inner column 43 come in contact with each other at three or more locations in the circumferential direction.