Abstract:
The present invention is directed to a focus detector, one embodiment of which includes a light source, a collimator lens, a beam splitter and an objective lens. The light emitted by the light source is collimated by the collimator lens and subsequently passed through the beam splitter. The objective lens focuses the light passing through the beam splitter on a rotating disk. The light reflected by the disk passes through the beam splitter and is directed to a sensor lens. The sensor lens directs the light beam to an optical element arranged in a light path adjacent a refocus point of the light beam. The optical element is so arranged that the light beam is split only when it is not refocused at the expected refocus point.
Abstract:
An apparatus for connecting a screw shaft and a drive cable of a shoulder belt position adjusting device of a seat belt includes a first joint coupled to a connecting end of the screw shaft, and a second joint coupled to an connecting end of the drive cable. The first joint includes a rotatable member and a first holder for receiving the rotatable member therein. The second joint includes a coupling member, a second holder for receiving the coupling member, a recess formed on the second holder for receiving the rotatable member, a stopper formed inside the second holder between the recess and a hole for the coupling member, and a spring to urge the coupling member against the stopper. The coupling member and the rotatable member are engaged with each other. The first and second joints are connected together by an engaging element and a receiving element.
Abstract:
A disc apparatus (10) includes an optical lens (14). A laser beam is irradiated onto a recording surface of the magneto-optical disc (68) through the optical lens (14), and a TE signal or an RF signal is detected on the basis of the laser beam reflected by the recording surface. Herein, an MPU (50) replaces the optical lens (14) in an optical axis direction, and a TE signal detection circuit (42) or an RF signal detection circuit (60) detects the TE signal or the RF signal at each of lens positions. A laser power is adjusted by the MPU (50) such that amplitude of each of the TE signal or the RF signal detected is below a saturation value. When a parameter is adjusted, a position of the optical lens (14) is controlled such that the amplitude of the TE signal or the RF signal detected thereafter is maximized.
Abstract:
A disk recording-playback device including a laser drive circuit for feeding a drive signal to an optical head and adjusting the power of a laser beam irradiated by the optical head, an error correcting circuit for detecting an error rate of a reproduced signal, and a system controller for controlling operation of the laser drive circuit for signal reproduction and signal recording based on the output of the error correcting circuit. The system controller successively sets the laser powers to at least three different values, obtains evaluation data for each laser power, approximates the relationships between the laser powers and the evaluation data to a quadratic curve, whereby an optimum laser power is derived corresponding to a vertex of the quadratic curve. Accordingly the optimum reproduction power and recording power are set, to thereby record and reproduce signals with high accuracy.
Abstract:
A motorized seat belt retractor having a load limiter to control the tensile load on a seat belt webbing, especially when the webbing is withdrawn due to an emergency condition. The load limiter controls the tension by controlling the condition of the motor that drives the retractor.
Abstract:
A motorized seat belt retractor having a load limiter to control the tensile load on a seat belt webbing, especially when the webbing is withdrawn due to an emergency condition. The load limiter controls the tension by controlling the condition of the motor that drives the retractor.
Abstract:
A shoulder belt position adjusting device for a seat belt assembly comprises a belt anchor through which a shoulder belt is loosely inserted, an anchor support block supporting the belt anchor, a guide rail for slidably holding the anchor support block, a screw shaft extending along the length of the guide rail and threadably engaged with the anchor support block, a drive cable including an outer cable, and an inner cable inserted into the outer cable and having a front end connected to the screw shaft, and a drive unit connected to the rear end of the inner cable. The screw shaft is rotated to move the anchor support block along the guide rail. A plurality of ribs extend from the outer peripheral surface of the inner cable and are spaced apart from one another along the length of the inner cable.
Abstract:
A pretensioner for a vehicle safety belt system adapted to tighten a webbing that restrains a vehicle occupant by displacing an element of the belt system in a manner such as to tighten the webbing comprises, as the motive power source for displacing the element, a torsion coil spring having a base end portion fixed to the vehicle, a coil portion retained in guided relation to the vehicle, and an operating end portion associated with the element such as to impart a driving force to the element to cause it to displace upon release of energy stored in the coil spring. The element of the belt system displaced by the torsion coil spring may be a portion of the restraint webbing itself or of a webbing associated with the restraint webbing or a buckle by which the webbing is attached to the vehicle.
Abstract:
A position adjusting device for a shoulder belt in a seat belt assembly includes a belt anchor into which the shoulder belt is loosely passed, an anchor support block supporting the belt anchor, a guide rail slidably holding the anchor support block, and a straight screw member which is arranged along a longitudinal direction of the guide rail and is screwed into the anchor support member, so that the anchor support block may be moved along the guide rail by the rotation of the screw member. A surface layer of solid lubricant is formed on at least one of thread surfaces of the screw member and the anchor support block.
Abstract:
To allow a weight type acceleration sensor to be employed as an acceleration sensor of a seat belt retractor which is incorporated in a seat back. A seat belt retractor 80 is attached to a seat back 14 and a cable winder 20 is attached to a portion where a supporting arm 12 and a shaft 18 for inclining the seat back 14 are connected to each other. The supporting arm 12 projects from a seat cushion 10 for supporting the seat back 14. Corresponding to the inclination of the seat back 14, the cable winder 20 rotates so that a cable 70 laid between the cable winder 20 and the seat belt retractor 80 is unwound or wound from/onto the winder 20. The attitude of the acceleration sensor 92 attached to the seat belt retractor 80 is controlled by the unwinding or winding of the cable 70 so that the acceleration sensor 92 always stands perpendicularly.