Abstract: An electric vehicle capable of protecting a coupling portion between a wheel and an axle from disturbance. An electric vehicle includes an axle that is a hollow cylindrical shaft passing substantially coaxially through a wheel in a manner extending from both sides of the wheel. A motor shaft is inserted into a hollow portion of the axle substantially coaxially with the axle in a manner extending from both ends of the axle. In this case, a motor is connected to a base end of the motor shaft extending from one end of the axle. Between the wheel and the motor, there are provided a coupling portion for coupling between the one end of the axle and the wheel, and a labyrinth structure for sealing between the wheel and the motor in a manner surrounding the coupling portion.

Abstract: An electric vehicle includes an axle that is a hollow cylindrical shaft. A motor shaft is inserted into a hollow portion of the axle substantially coaxially with the axle. In this case, on one side of a wheel, a motor is connected to a base end of the motor shaft extending from one end of the axle. Also, on the other side of the wheel, a reduction mechanism is connected to a leading end of the motor shaft extending from the other end of the axle.

Abstract: An electric vehicle includes a double-sided swing arm that supports a motor shaft, an axle, and a wheel by supporting a motor on one side of the wheel and a reduction mechanism on the other side of the wheel. In this case, the swing arm is composed of, on the one side of the wheel, plural separable arm portions. The arm portions have respective separation points on an outside or outer periphery of the wheel. With the components arranged in this manner, weight balance of the electric vehicle is easily achieved, and the operational efficiency of mounting, removal, and replacement of the wheel and the motor is improved.

Abstract: A mounting structure is provided which is capable of easily attaching a heat sink irrespective of a thickness of an LSI (Large-Scale Integration circuit) mounted on a printed circuit board. Each female screw metal fitting of each female screw portion is attached on an upper surface of a cylindrical gel in a stacked manner and a lower surface of the cylindrical gel is attached to the printed circuit board. An end portion of each male screw is made to pass through each through-hole of the heat sink so as to be screwed into each of the female screw portions. With a progress of screwing therein, each of the female screw portions is elevated and the cylindrical gel is pulled and elongated. Since a restoring force occurs when the cylindrical gel is elongated, the heat sink is pulled by each of the female screw portions toward the LSI. Thus, variations in height can be accommodated.

Abstract: In an internal combustion engine, a variable valve-actuating mechanism includes a trigger pin operable to permit axial movement of a rocker arm concurrently with a axial movement of a rocker arm shaft. A retention member has an insertion aperture formed therein, in which the trigger pin is inserted, and which slidably supports the trigger pin in the inserting direction. The trigger pin includes upper and lower expanded portions disposed on both sides thereof in the inserting direction. The upper and lower expanded portions of the trigger pin are operable to disable sliding motion of the trigger pin, relative to the retention member, beyond a predetermined range. The upper and lower expanded portions allow the trigger pin to be integrally assembled in the insertion aperture of the retention member, so as to be selectively retained therein.

Abstract: The disclosed structure achieves a desired balance between higher-rigidity and weight saving in a connection-type rocker arm which integrally rocks a plural of arm portions. The rocker arm has a plurality of arm portions integrally formed on a swinging base end side of the rocker arm which are forked and extend towards a swinging end of the rocker arm, a connecting portion which integrally connects each swinging end of the arm portions, and a concave thinning portion which overlaps a swinging trajectory of the connecting portion, when viewed in the axis direction of the pivot shaft of the rocker arm.

Abstract: An internal combustion engine is equipped with a variable valve controlling system, in which the single actuator is disposed in a cylinder head on one side where one ends of the rocker-arm shafts are disposed, while enabling the single actuator to activate the rocker arms irrespective of the arrangement of the rocker-arm shafts. In the internal combustion engine, a hydraulic cylinder of a hydraulic actuator is disposed so as to transverse a timing chamber. Operation elements extend respectively from sidewalls of a plunger in the hydraulic cylinder, and activate respective rocker-arm shafts. In a motorcycle on which the engine is mounted, a frame member of a vehicle frame is disposed outside the hydraulic actuator.

Abstract: A small-sized vehicle has an oil control valve for a hydraulically-actuated mechanism of an engine, and provides good cooling of the oil control valve. A small-sized vehicle includes a spool valve for adjusting a hydraulic pressure for a hydraulically-actuated mechanism of an engine. The spool valve is disposed sideways of a cylinder portion (cylinder head) such that an axis of the spool valve extends substantially in parallel with an axis of the cylinder portion. Further, the spool valve is disposed at a position that is rearward of a radiator and that falls within a vertical span of the radiator in a vehicle side view.

Abstract: In an internal combustion engine, a variable valve-actuating mechanism includes a trigger pin operable to permit axial movement of a rocker arm concurrently with a axial movement of a rocker arm shaft. A retention member has an insertion aperture formed therein, in which the trigger pin is inserted, and which slidably supports the trigger pin in the inserting direction. The trigger pin includes upper and lower expanded portions disposed on both sides thereof in the inserting direction. The upper and lower expanded portions of the trigger pin are operable to disable sliding motion of the trigger pin, relative to the retention member, beyond a predetermined range. The upper and lower expanded portions allow the trigger pin to be integrally assembled in the insertion aperture of the retention member, so as to be selectively retained therein.

Abstract: An internal combustion engine is equipped with a variable valve controlling system, in which the single actuator is disposed in a cylinder head on one side where one ends of the rocker-arm shafts are disposed, while enabling the single actuator to activate the rocker arms irrespective of the arrangement of the rocker-arm shafts. In the internal combustion engine, a hydraulic cylinder of a hydraulic actuator is disposed so as to transverse a timing chamber. Operation elements extend respectively from sidewalls of a plunger in the hydraulic cylinder, and activate respective rocker-arm shafts. In a motorcycle on which the engine is mounted, a frame member of a vehicle frame is disposed outside the hydraulic actuator.

Abstract: An internal combustion engine is equipped with a variable valve control system which is operable to selectively actuate an engine valve using one of two cams of a camshaft, by sliding a rocker arm in the axial direction of a rocker-arm shaft. The system is capable of restricting the axial-direction movement of the rocker arm within a predetermined range, using a simple structure without unduly increasing the number of component parts. Position-restriction portions are formed in a rocker arm, and abut on a trigger arm to restrict sliding movement of the rocker arm within a predetermined amount, when the trigger arm is disengaged from the rocker arm.

Abstract: A mounting structure is provided which is capable of easily attaching a heat sink irrespective of a thickness of an LSI (Large-Scale Integration circuit) mounted on a printed circuit board. Each female screw metal fitting of each female screw portion is attached on an upper surface of a cylindrical gel in a stacked manner and a lower surface of the cylindrical gel is attached to the printed circuit board. An end portion of each male screw is made to pass through each through-hole of the heat sink so as to be screwed into each of the female screw portions. With a progress of screwing therein, each of the female screw portions is elevated and the cylindrical gel is pulled and elongated. Since a restoring force occurs when the cylindrical gel is elongated, the heat sink is pulled by each of the female screw portions toward the LSI. Thus, variations in height can be accommodated.

Abstract: A mounting structure is provided which is capable of easily attaching a heat sink irrespective of a thickness of an LSI (Large-Scale Integration circuit) mounted on a printed circuit board. Each female screw metal fitting of each female screw portion is attached on an upper surface of a cylindrical gel in a stacked manner and a lower surface of the cylindrical gel is attached to the printed circuit board. An end portion of each male screw is made to pass through each through-hole of the heat sink so as to be screwed into each of the female screw portions. With a progress of screwing therein, each of the female screw portions is elevated and the cylindrical gel is pulled and elongated. Since a restoring force occurs when the cylindrical gel is elongated, the heat sink is pulled by each of the female screw portions toward the LSI. Thus, variations in height can be accommodated.

Abstract: A mounting structure is provided which is capable of easily attaching a heat sink irrespective of a thickness of an LSI (Large-Scale Integration circuit) mounted on a printed circuit board. Each female screw metal fitting of each female screw portion is attached on an upper surface of a cylindrical gel in a stacked manner and a lower surface of the cylindrical gel is attached to the printed circuit board. An end portion of each male screw is made to pass through each through-hole of the heat sink so as to be screwed into each of the female screw portions. With a progress of screwing therein, each of the female screw portions is elevated and the cylindrical gel is pulled and elongated. Since a restoring force occurs when the cylindrical gel is elongated, the heat sink is pulled by each of the female screw portions toward the LSI. Thus, variations in height can be accommodated.

Abstract: A printer includes a supply shaft wound with unused film including contrast agent, a winding shaft wound with used film including used contrast agent, rotation-speed detector for detecting a rotation speed of the supply shaft, and remaining-amount detector for determining an amount of unused film from the detected rotation speed detected. In the printer, the remaining amount of unused film such as ink film, roll paper or the like can be determined accurately.

Abstract: A printer includes a supply shaft wound with unused film including contrast agent, a winding shaft wound with used film including used contrast agent, rotation-speed detector for detecting a rotation speed of the supply shaft, and remaining-amount detector for determining an amount of unused film from the detected rotation speed detected. In the printer, the remaining amount of unused film such as ink film, roll paper or the like can be determined accurately.

Abstract: A user does not have to observe the orientation of a supply-side film core and a roll-up-side film core, when placing them into a case. Shaft sections are disposed at both ends of the supply-side film core and the roll-up-side film core made of resins. The shaft sections have different diameters from each other. Each shaft section has a diameter corresponding to each supporting section. The user can therefore set the ink film in a predetermined position and orientation in the case as a single step.

Abstract: A user does not have to observe the orientation of a supply-side film core and a roll-up-side film core, when placing them into a case. Shaft sections are disposed at both ends of the supply-side film core and the roll-up-side film core made of resins. The shaft sections have different diameters from each other. Each shaft section has a diameter corresponding to each supporting section. The user can therefore set the ink film in a predetermined position and orientation in the case as a single step.

Abstract: A multi-cylinder engine in which a transmission mechanism is provided between a cam shaft linked with intake valves and exhaust valves and a crank shaft rotatably supported by a crank case and a plurality of bearing caps, wherein the transmission mechanism is configured as a chain-type transmission mechanism for making the engine compact. The restriction on the rotatably supporting position of a chain tensioner is moderated and the length of the chain tensioner is set at a relatively large value. The transmission mechanism is configured such that an endless chain, is wound around a drive sprocket, fixed on a crank shaft and a driven sprocket, fixed on a cam shaft. One end portion in the longitudinal direction of a chain tensioner, extending in the running direction of the chain is rotatably supported on one of the plurality of bearing caps in such a manner as to be elastically, slidably in contact with the chain.

Abstract: A printer includes a supply shaft wound with unused film including contrast agent, a winding shaft wound with used film including used contrast agent, rotation-speed detector for detecting a rotation speed of the supply shaft, and remaining-amount detector for determining an amount of unused film from the detected rotation speed detected. In the printer, the remaining amount of unused film such as ink film, roll paper or the like can be determined accurately.