Abstract: A crankshaft bearing structure is provided capable of properly lubricating a thrust bearing even when low-viscosity oil is used in an engine. The crankshaft bearing structure includes a crankshaft, a cylinder block, plural journal bearings, and thrust bearings. Each of the plural journal bearings is annularly attached to a respective one of plural crank journals when the crankshaft is rotating. The thrust bearings are attached to a shaft support section, which supports the crank journal, in the cylinder block, to restrict movement of the crankshaft in a direction along an axis. The upper journal bearing annularly attached to the crank journal has a circumferential groove provided in an inner circumferential surface, connected to an oil hole, and extending in a circumferential direction.

Abstract: A crankshaft bearing structure is provided, in which a crankshaft includes a first crank journal and a second crank journal, and a crank pin disposed therebetween. First upper-and-lower journal bearings and second upper-and-lower journal bearings are attached to the respective crank journals, and each upper bearing includes an oil hole connected to an oil passage to supply oil to between the crank journal and the journal bearings. An in-shaft oil passage is formed in the crankshaft to draw oil from an outer circumferential surface of the second crank journal to an outer circumferential surface of the crank pin. The second upper journal bearing has, on an inner circumferential surface thereof, a circumferential groove connected to the oil hole. The oil is supplied to between the first upper-and-lower journal bearings and the first crank journal, only through a passage passing through the oil hole of the first upper journal bearing.

Abstract: A crankshaft bearing structure is provided, in which a crankshaft includes a first crank journal and a second crank journal, and a crank pin disposed therebetween. First upper-and-lower journal bearings and second upper-and-lower journal bearings are attached to the respective crank journals, and each upper bearing includes an oil hole connected to an oil passage to supply oil to between the crank journal and the journal bearings. An in-shaft oil passage is formed in the crankshaft to draw oil from an outer circumferential surface of the second crank journal to an outer circumferential surface of the crank pin. The second upper journal bearing has, on an inner circumferential surface thereof, a circumferential groove connected to the oil hole. The oil is supplied to between the first upper-and-lower journal bearings and the first crank journal, only through a passage passing through the oil hole of the first upper journal bearing.

Abstract: According to one embodiment, a vehicle-seat slide device includes a rail to be fixed to a floor, the rail extending in a vehicle front-back direction; a slider slidably attached to the rail and fixed to a seat; a lock member being movable between a lock position at which the slider is locked to one of slide positions on the rail and a lock release position at which the slider is released from being locked to the rail; a support member fixed to the slider; and an operational member supported by the support member to be rotatable about a rotational center extending in a vehicle lateral direction. The operational member receives an input from an input member to rotate in a first rotational direction around the rotational center to thereby move the lock member from the lock position to the lock release position.

Abstract: A vehicle seat slide device includes an upper rail, a lower rail, a lock mechanism, and a lock release mechanism. The lock mechanism restricts relative movement of the upper rail. The upper rail includes two side walls and an upper wall. The lock release mechanism includes a lever member, a push portion, and a spring member. The push portion pushes an unlock element of the lock mechanism and performs an unlocking action with the lock mechanism when the lever member is pivoted based on an operation force. The spring member applies an urging force to the lever member in a direction opposite to the direction in which the lever member is pivoted. The spring member includes an engagement end, which engages the lever member, and a spring body. At least the spring body is arranged in an inner space of the upper rail defined below the upper wall.

Abstract: A vehicle seat slide device is capable of improving an operational feeling of an unlocking member. The vehicle seat slide device includes: a lower rail; an upper rail that is movably attached to the lower rail and supports a seat; a lock spring that is attached to the upper rail, has a lock part engaging with the lower rail to restrict movement of the upper rail, and is formed in an annular shape; and an unlocking member that is attached to the upper rail and displaces the lock spring to disengage the lock spring and the lower rail to clear the restriction on the movement of the upper rail. The unlocking member is positioned more inside than the lock spring as seen in both a longitudinal direction and a width direction of the upper rail.

Abstract: A slide device includes a lower rail, an upper rail, a lock member, and a lock release member. The upper rail is coupled to the lower rail in a movable manner. The lock member is configured to restrict movement of the upper rail relative to the lower rail. The lock release member is configured to release a lock by the lock member. The lock release member includes a bracket fixed to the upper rail. A cover is attached to the bracket.

Abstract: A slide device includes a lower rail, an upper rail, a lock member, and a lock release member. The upper rail is coupled to the lower rail in a movable manner. The lock member is configured to restrict movement of the upper rail relative to the lower rail. The lock release member is configured to release a lock by the lock member. The lock release member includes a bracket fixed to the upper rail. A cover is attached to the bracket.

Abstract: A vehicle seat slide device is capable of improving an operational feeling of an unlocking member. The vehicle seat slide device includes: a lower rail; an upper rail that is movably attached to the lower rail and supports a seat; a lock spring that is attached to the upper rail, has a lock part engaging with the lower rail to restrict movement of the upper rail, and is formed in an annular shape; and an unlocking member that is attached to the upper rail and displaces the lock spring to disengage the lock spring and the lower rail to clear the restriction on the movement of the upper rail. The unlocking member is positioned more inside than the lock spring as seen in both a longitudinal direction and a width direction of the upper rail.

Abstract: According to one embodiment, a vehicle-seat slide device includes a rail to be fixed to a floor, the rail extending in a vehicle front-back direction; a slider slidably attached to the rail and fixed to a seat; a lock member being movable between a lock position at which the slider is locked to one of slide positions on the rail and a lock release position at which the slider is released from being locked to the rail; a support member fixed to the slider; and an operational member supported by the support member to be rotatable about a rotational center extending in a vehicle lateral direction. The operational member receives an input from an input member to rotate in a first rotational direction around the rotational center to thereby move the lock member from the lock position to the lock release position.

Abstract: A vehicle seat slide device includes an upper rail, a lower rail, a lock mechanism, and a lock release mechanism. The lock mechanism restricts relative movement of the upper rail. The upper rail includes two side walls and an upper wall. The lock release mechanism includes a lever member, a push portion, and a spring member. The push portion pushes an unlock element of the lock mechanism and performs an unlocking action with the lock mechanism when the lever member is pivoted based on an operation force. The spring member applies an urging force to the lever member in a direction opposite to the direction in which the lever member is pivoted. The spring member includes an engagement end, which engages the lever member, and a spring body. At least the spring body is arranged in an inner space of the upper rail defined below the upper wall.

Abstract: According to one embodiment, a vehicle slide rail structure includes: a lower rail including a bottom wall extending in a first direction; an upper rail attached to the lower rail; a member including a first surface, two ends in a second direction intersecting the first direction, a continuous region, a first fitting element, and a second fitting element and attached to the bottom wall, the first surface facing the bottom wall, the two ends being on the first surface, the continuous region being of the first surface continuous between the two ends in the second direction; and a projection located between the first fitting element and the second fitting element in the first direction, protruding from the continuous region, and configured to abut against the bottom wall to elastically deform the member such that the first fitting element and the second fitting element are pressed against the bottom wall.

Abstract: A vehicle seat slide device includes: a lower rail including side wall portions provided to extend in a front-rear direction of a vehicle, a connecting wall portion connecting bottom ends of the side wall portions in a width direction, inward-extending wall portions overhanging from top ends of the side wall portions to inside in the width direction, and downward-extending wall portions overhanging downward from tips of the inward-extending wall portions; an upper rail including a main body portion and flanges; a locking member capable of restricting movement of the upper rail in the front-rear direction relative to the lower rail; and a reinforcement member bonded to a rear end of the lower rail and including a side wall reinforcement portion and an inward-extending wall reinforcement portion, and in which a cutout is formed in a rear end of the inward-extending wall reinforcement portion.

Abstract: A vehicle seat slide device includes: a first rail provided to extend in a front-rear direction of a vehicle and including first side wall portions, and first flanges overhanging from tips of the first side wall portions to inside and further folded to a base end side of the first side wall portions; a second rail joined to the first rail to be capable of moving in the front-rear direction and including second side wall portions, a connecting wall portion connecting base ends of the second side wall portions, and second flanges overhanging to an outside and further folded so as to be surrounded by the first side wall portions and the first flanges; and a locking member joined to the second rail to rotate around an axial line extending in the width direction and capable of restricting relative movement of the first and second rails.

Abstract: In a case where an engagement member is assembled on an upper rail, a second rotary shaft portion is inserted to a shaft receiving bore of a first side wall portion from an inner side of an upper rail. After the insertion, the engagement member is rotated so that the second rotary shaft portion is inserted to the shaft receiving bore of the second side wall portion. At this time, because a shaft allowable length is specified to be greater than a shaft maximum rotation length, an interruption of an insertion of the rotary shaft portion because of a contact of the second rotary shaft portion with an edge portion of the shaft receiving bore at the second side wall portion is restrained.

Abstract: A vehicle seat slide device includes: a first rail provided to extend in a front-rear direction of a vehicle and including first side wall portions, and first flanges overhanging from tips of the first side wall portions to inside and further folded to a base end side of the first side wall portions; a second rail joined to the first rail to be capable of moving in the front-rear direction and including second side wall portions, a connecting wall portion connecting base ends of the second side wall portions, and second flanges overhanging to an outside and further folded so as to be surrounded by the first side wall portions and the first flanges; and a locking member joined to the second rail to rotate around an axial line extending in the width direction and capable of restricting relative movement of the first and second rails.

Abstract: A vehicle seat slide device includes: a lower rail including side wall portions provided to extend in a front-rear direction of a vehicle, a connecting wall portion connecting bottom ends of the side wall portions in a width direction, inward-extending wall portions overhanging from top ends of the side wall portions to inside in the width direction, and downward-extending wall portions overhanging downward from tips of the inward-extending wall portions; an upper rail including a main body portion and flanges; a locking member capable of restricting movement of the upper rail in the front-rear direction relative to the lower rail; and a reinforcement member bonded to a rear end of the lower rail and including a side wall reinforcement portion and an inward-extending wall reinforcement portion, and in which a cutout is formed in a rear end of the inward-extending wall reinforcement portion.

Abstract: In a case where an engagement member is assembled on an upper rail, a second rotary shaft portion is inserted to a shaft receiving bore of a first side wall portion from an inner side of an upper rail. After the insertion, the engagement member is rotated so that the second rotary shaft portion is inserted to the shaft receiving bore of the second side wall portion. At this time, because a shaft allowable length is specified to be greater than a shaft maximum rotation length, an interruption of an insertion of the rotary shaft portion because of a contact of the second rotary shaft portion with an edge portion of the shaft receiving bore at the second side wall portion is restrained.

Abstract: An optical transmitter for coupling and wavelength-multiplexing optical signals with a different wavelength has 3 or more light sources for emitting parallel optical signals with a different wavelength, and 2 kinds of optical components with a different optical signal reflectance arranged in an optical path of each light source for coupling into one the optical signals emitted from the light sources respectively. The reflectance or transmittance of each of the 2 kinds of optical components is set so that each optical signal has the same optical signal power when reflected off or transmitted through the optical components for being coupled together and output from the optical transmitter.

Abstract: An optical transmitter for coupling and wavelength-multiplexing optical signals with a different wavelength has 3 or more light sources for emitting parallel optical signals with a different wavelength, and 2 kinds of optical components with a different optical signal reflectance arranged in an optical path of each light source for coupling into one the optical signals emitted from the light sources respectively. The reflectance or transmittance of each of the 2 kinds of optical components is set so that each optical signal has the same optical signal power when reflected off or transmitted through the optical components for being coupled together and output from the optical transmitter.