Abstract: A steering system steers wheels of a vehicle through a shift of a steering shaft. The steering system includes: an electric motor; transmission device that transmits an output of the electric motor to the steering shaft; and a malfunction detector that detects a malfunction of the transmission device based on a rotational angle of the electric motor and a shift distance of the steering shaft.

Abstract: A liquid ejecting head including a flow path forming substrate in which a pressure chamber in communication with a nozzle is formed, a diaphragm formed on the flow path forming substrate, and a piezoelectric actuator including a first electrode, a piezoelectric layer, and a second electrode that are formed on the diaphragm. In the liquid ejecting head, a center portion of the diaphragm is not provided with an active portion, which is a portion where the piezoelectric layer is interposed between the first electrode and the second electrode, a protective film that covers the diaphragm is formed in the center portion, and compressive stress of the protective film is larger than that of the diaphragm.

Abstract: There is provided an automatic transmission capable of preventing deterioration of driving performance even when an engagement mechanism is not switched due to a failure. An automatic transmission includes a first brake which is always in a fixed state from a first forward gear stage to a predetermined gear stage and is in an open state at a gear stage with a higher speed than the predetermined gear stage, and a hydraulic sensor configured to detect whether the first brake is switched to the fixed state. When a transmission control device instructs the first brake to switch to the fixed state, and it is confirmed that the first brake is in an open state, the transmission control device instructs engagement mechanisms other than the first brake to perform switching so that a preliminary gear stage is able to be set.

Abstract: Provided is a hydraulic pressure control device. A hydraulic pressure control device includes a solenoid valve configured to supply hydraulic pressure to switch between an engaged state and a released state of a lock-up clutch, and a transmission control device configured to control the solenoid valve. The solenoid valve supplies hydraulic pressure to switch between a parking locked state and a parking released state of a parking lock mechanism, in addition to switching of the lock-up clutch.

Abstract: The electric power steering apparatus according to the present disclosure includes a steering assist mechanism and a controller. The steering assist mechanism is driven by a motor and assists operation of a steering wheel by a driver. The controller acquires the position of the steering wheel and sets a target value of a steering reaction torque acting on the steering wheel. Then, the controller calculates a position target of the steering assist mechanism based on the position of the steering wheel and the target value of the steering reaction torque, and controls the motor of the steering assist mechanism according to the position target of the steering assist mechanism.

Abstract: The lubrication loop 5 includes a first lubrication flow path L4, a release flow path L6, a low pressure fluid discharge valve 13, a return flow path L7, and a discharge flow path L8. In the low pressure fluid discharge valve 13, an accumulator piston 22 is biased to the other end side of a piston housing chamber 21 by a spring 26 when a pressure of the fluid applied to a piston position control chamber 27 is less than a predetermined pressure so that a supply port 24 and a discharge port 25 communicate with each other via a spool groove 32.

Abstract: Information indicating a shape of a screen, a shape of a viewing area and a relative positional relationship between the viewing area and the screen is acquired. A shared area in which a three-dimensional image presented by a three-dimensional display is to be arranged in order to be observed from any position in the viewing area is created based on the acquired information. Based on the acquired information, a specific area in which a three-dimensional image presented by the three-dimensional display is to be arranged in order to be observed from a specific position in the viewing area is created. The data indicating the created shared area and the data indicating the specific area are generated.

Abstract: When hydraulic information is not available for use, a lock mechanism control unit of a transmission's rotating shaft operated by hydraulic pressure sets the shift range to a non-running range and sets a parking lock to an unlocked state if a vehicle is in a running state and rotation speed of a drive unit is equal to or higher than a predetermined value, but sets the shift range to a parking range and sets the parking lock to a locked state if the vehicle is in a non-running state or the rotation speed is lower than the predetermined value.

Abstract: An actuator having sufficiently high detection accuracy while having a simple configuration is provided. An actuator includes a cylinder (51), a piston (52) that moves inside the cylinder (51), a stroke sensor (53) that detects a position of the piston (52), an edge portion (51a1) that restricts rotation to one side, and a restriction protrusion (51b) that restricts rotation to the other side. The amount of rotation allowed by the edge portion (51a1) is larger than the amount of rotation allowed by the restriction protrusion (51b). A center of a sensor (53c) of the stroke sensor (53) is shifted to one side from a center of a member to be detected (53b) fixed to the piston (52).

Abstract: A three-dimensional display, wherein an area in which eyes of observers are to be positioned when the observers observe a three-dimensional image is predefined as a viewing area, the viewing area is defined to be circular and surround a light ray controller at a position farther upward than a top board of a table, a light ray group is emitted to an outer peripheral surface of the light ray controller from a light ray generator arranged below the top board, and the light ray controller is formed such that the plurality of light rays emitted to a plurality of portions that are different from one another and arranged in a ridge line direction are transmitted through the plurality of portions while respectively being diffused in a virtual plane, and is formed such that center lines of a plurality of transmitted diffused light rays pass through the viewing area.

Abstract: An actuator in which the abrasion of a piston and a cylinder can be prevented and it is difficult for the smooth movement of the piston to be hindered is provided. The actuator includes a cylinder (51), a piston (52) that moves inside the cylinder (51) according to a supplied fluid pressure, and a detent mechanism (54) that fixes a position of the piston (52) until the fluid pressure exceeds a predetermined value. The detent mechanism (54) includes a first elastic member 54a and a second elastic member 54b which are arranged to face each other with an axis (a) of the piston (52) interposed therebetween and press the piston (52) so as to sandwich the piston (52) therebetween.

Abstract: A three-dimensional image observation system includes a three-dimensional display (100) and a guide frame (410). The three-dimensional display is constituted by a light ray controller (1), a plurality of light ray generators (2), a control device (3) and a storage device (4). Further, the three-dimensional display (100) is provided at a table (5). In the three-dimensional display (100), the area where eyes of observers (10) are to be positioned when the observers observe a three-dimensional image is predefined as a viewing area (500), and the guide frame (410) visually guides the eyes of the observers (10) from the outside of the viewing area (500) to the inside of the viewing area.

Abstract: The present application discloses a gear device provided with: an outer cylinder; an internal member at least partially housed in the outer cylinder and configured to rotate relative to the outer cylinder about a predetermined rotation axis; a first main bearing fitted into an annular space formed between the outer cylinder and the internal member; and a second main bearing fitted into the annular space and configured to define the rotation axis in cooperation with the first main bearing. A distance between a first intersection where a load action line of the first main bearing intersects with the rotation axis and a second intersection where a load action line of the second main bearing intersects with the rotation axis is set to fall within a range expressed by a predetermined inequality expression.

Abstract: A gear device includes an outer cylinder; an internal member at least partially housed in the outer cylinder and configured to rotate relative to the outer cylinder about a predetermined rotation axis; a first main bearing fitted into an annular space formed between the outer cylinder and the internal member; and a second main bearing fitted into the annular space and configured to define the rotation axis in cooperation with the first main bearing. A distance between a first intersection where a load action line of the first main bearing intersects with the rotation axis and a second intersection where a load action line of the second main bearing intersects with the rotation axis is set to fall within a range expressed by a predetermined inequality expression.

Abstract: A three-dimensional display, wherein an area in which eyes of observers are to be positioned when the observers observe a three-dimensional image is predefined as a viewing area, the viewing area is defined to be circular and surround a light ray controller at a position farther upward than a top board of a table, a light ray group is emitted to an outer peripheral surface of the light ray controller from a light ray generator arranged below the top board, and the light ray controller is formed such that the plurality of light rays emitted to a plurality of portions that are different from one another and arranged in a ridge line direction are transmitted through the plurality of portions while respectively being diffused in a virtual plane, and is formed such that center lines of a plurality of transmitted diffused light rays pass through the viewing area.

Abstract: A hydraulic accumulator includes a limiting portion that is fitted into a ring end gap of a snap ring to limit a decrease in a diameter of the snap ring. The snap ring is stamped from a metal sheet by a press machine. Therefore, one of two opposed surfaces of a portion of the snap ring, which is fitted into a groove, forms a sloped surface as a result of shear droop. The limiting portion is fitted into the ring end gap of the snap ring to limit the decrease in the diameter of the snap ring. Thus, it is possible to limit riding of the sloped surface of the snap ring on a corner of the groove, and thereby it is possible to limit removal of the snap ring from the groove.

Abstract: A parking lock apparatus includes an engaging mechanism, a slider, a hydraulic circuit, and a processor. The engaging mechanism is to prevent a rotation of a rotating body when the engaging mechanism is in a mechanical engagement state. The slider is to switch a state of the engaging mechanism between the mechanical engagement state and a mechanical disengagement state in accordance with a position of the slider. The hydraulic circuit is to change the position of the slider. The processor is configured to increase line pressure in the hydraulic circuit when the engaging mechanism is in the mechanical engagement state.

Abstract: An actuator capable of preventing the inside of a cylinder from being scratched is provided. A two-way piston includes a cylinder having an opening, a piston, and a stroke sensor that detects a position of the piston. The stroke sensor includes a stay that extends from a portion exposed from the opening of the piston to the outside of the cylinder, a member to be detected that is attached to the stay, and a sensor that detects a position of the member to be detected. The piston including a fixing hole having a depth smaller than a diameter of the piston in the portion exposed from the opening. The stay is fixed by a bolt that is inserted into the fixing hole.

Abstract: A steering system steers wheels of a vehicle through a shift of a steering shaft. The steering system includes: an electric motor; transmission device that transmits an output of the electric motor to the steering shaft; and a malfunction detector that detects a malfunction of the transmission device based on a rotational angle of the electric motor and a shift distance of the steering shaft.

Abstract: A three-dimensional image observation system includes a three-dimensional display (100) and a guide frame (410). The three-dimensional display is constituted by a light ray controller (1), a plurality of light ray generators (2), a control device (3) and a storage device (4). Further, the three-dimensional display (100) is provided at a table (5). In the three-dimensional display (100), the area where eyes of observers (10) are to be positioned when the observers observe a three-dimensional image is predefined as a viewing area (500), and the guide frame (410) visually guides the eyes of the observers (10) from the outside of the viewing area (500) to the inside of the viewing area.