Abstract: A screen device is configured to be attached to a helmet and includes a support and a combiner. The support includes a rail portion that supports the combiner. The combiner includes a projection surface, onto which an image projected from a projector attached to the helmet is presented, and a supported portion, supported by the rail portion. The rail portion supports the supported portion to be movable between a display position where the projection surface is arranged in front of a wearer of the helmet and a retraction position where the projection surface is retracted away from the front of the wearer. The support further includes a positioner that positions the supported portion supported by the rail portion. The positioner is configured to position the supported portion when the positioner is externally operated in at least one of the display position and the retraction position.

Abstract: A shield lock mechanism for attachment to a shell includes a holding member configured to be moved by an external operation between a holding position at which a shield is held and an attachment-detachment position at which the shield can be attached or detached, a biasing member configured to constantly bias the holding member toward the holding position, and a restriction member configured to be moved by an external operation between a restricting position at which of the holding member arranged at the holding position is restricted and a cancelling position at which the restriction is cancelled.

Abstract: A screen device includes a combiner that shows an image projected by a helmet at the helmet; and a vertical movement mechanism attached to a shell of the helmet, wherein the vertical movement mechanism supports the combiner so that the combiner is movable in a vertical direction and so that an inclination of the combiner is changeable with respect to the vertical direction.

Abstract: A visor locking mechanism is applied to a helmet equipped with a visor. The visor is provided on an inner side of an outer shell of the helmet which has a facial opening in a front side thereof. The visor is attached to a pair of left and right holders which are pivotably attached to the outer shell. The visor is configured to close or open at least part of the facial opening. A lock member that has an operation portion and a catch portion is disposed near at least one of the pair of holders. The operation portion allows the catch portion to fit together with or disengage from a catch counterpart portion provided at the pair of holders, whereby the visor becomes anchored or released.

Abstract: A visor locking mechanism is applied to a helmet equipped with a visor. The visor is provided on an inner side of an outer shell of the helmet which has a facial opening in a front side thereof. The visor is attached to a pair of left and right holders which are pivotably attached to the outer shell. The visor is configured to close or open at least part of the facial opening. A lock member that has an operation portion and a catch portion is disposed near at least one of the pair of holders. The operation portion allows the catch portion to fit together with or disengage from a catch counterpart portion provided at the pair of holders, whereby the visor becomes anchored or released.

Abstract: An aerodynamic control device includes a void opening. The void opening decreases a resistance of a turbulence generated by a component part located behind a center of a longitudinal width of a helmet and is formed so that one end is connected to the helmet and the other end protrudes backward from the helmet.

Abstract: A shield includes one or more protrusion members having shapes protruding from an outer surface of the shield are provided or, alternatively, one or more recesses having shapes depressed from the outer surface of the shield are carved. The one or more protrusion members or the one or more recesses are located at vicinities of both side positions on the shield for covering a face where the lateral width of the shield in right and left directions becomes a maximum.

Abstract: An aerodynamic control device includes a void opening. The void opening decreases a resistance of a turbulence generated by a component part located behind a center of a longitudinal width of a helmet and is formed so that one end is connected to the helmet and the other end protrudes backward from the helmet.

Abstract: In a valve timing adjusting device, a vane rotor includes a second supply oil passage connectable to a first supply oil passage of a second shaft. A check valve is provided between the vane rotor and the second shaft, and permits a flow from the first supply oil passage toward the second supply oil passage and prevents a flow from the second supply oil passage toward the first supply oil passage. A fixing unit is provided between the check valve and the second shaft, and fixes the check valve between the fixing unit and the vane rotor. The fixing unit includes a third supply oil passage which connects the first supply oil passage and the second supply oil passage. A filter is provided for the fixing unit and can capture foreign substances flowing through the third supply oil passage.

Abstract: This invention provides a helmet shield attaching mechanism capable of relatively easily and relatively accurately performing an adjustment operation for satisfactorily bringing the inner surface of a shield in a substantially fully-closed state into close contact with the window opening rim portion of a head protecting body. The holding position of stopped means of a movable base member, whose position is held by stopper means of a stationary base member in an at least substantially fully-closed state of the shield, can be selected from one of a plurality of portions of the movable base member substantially in the back-and-forth direction.

Abstract: A shield includes one or more protrusion members having shapes protruding from an outer surface of the shield are provided or, alternatively, one or more recesses having shapes depressed from the outer surface of the shield are carved. The one or more protrusion members or the one or more recesses are located at vicinities of both side positions on the shield for covering a face where the lateral width of the shield in right and left directions becomes a maximum.

Abstract: In this invention, a visor is configured to be inserted into a slit of a movable plate. One of an engaging projecting portion and an engaging concave portion is provided on the visor, and the other is provided on the movable plate. When the visor pivots in a first direction about the engaging projecting portion, a concave corner portion of the visor comes into contact with a first position regulating portion of the movable plate, thereby impeding the pivotal movement of the visor. When the visor pivots in a second direction, the outer wall surface of the visor comes into contact with wall portions of the movable plate, thereby impeding the pivotal movement of the visor.

Abstract: In a valve timing adjusting device, a vane rotor includes a second supply oil passage connectable to a first supply oil passage of a second shaft. A check valve is provided between the vane rotor and the second shaft, and permits a flow from the first supply oil passage toward the second supply oil passage and prevents a flow from the second supply oil passage toward the first supply oil passage. A fixing unit is provided between the check valve and the second shaft, and fixes the check valve between the fixing unit and the vane rotor. The fixing unit includes a third supply oil passage which connects the first supply oil passage and the second supply oil passage. A filter is provided for the fixing unit and can capture foreign substances flowing through the third supply oil passage.

Abstract: This invention provides a helmet shield attaching mechanism capable of relatively easily and relatively accurately performing an adjustment operation for satisfactorily bringing the inner surface of a shield in a substantially fully-closed state into close contact with the window opening rim portion of a head protecting body. The holding position of stopped means of a movable base member, whose position is held by stopper means of a stationary base member in an at least substantially fully-closed state of the shield, can be selected from one of a plurality of portions of the movable base member substantially in the back-and-forth direction.