摘要:
A pinion shaft rotated by a steering wheel has a pinion gear formed thereon. A rack bar has at a front surface thereof a toothed rack portion meshed with the pinion gear of the pinion shaft. A rotating member is arranged to support a rear surface of the rack bar while being permitted to rotate when the rack bar moves axially. A biasing mechanism that biases the rotating member toward an actually meshed portion between the toothed rack portion and the pinion gear. A supporting member is arranged to slidably support the rear surface of the rack bar.
摘要:
A steering apparatus includes an axle housing rotatably supporting a wheel hub on which a steered road wheel is installed, and a lower suspension-system control arm adapted to be oscillatingly supported at one end on a vehicle body and having a turning portion provided at the other end for pivotably supporting the axle housing by the turning portion. An electric motor is installed on the lower arm for turning the axle housing by a driving force produced by the motor. A rotation axis of the motor and a pivot of the axle housing are arranged to be offset from each other.
摘要:
An apparatus and method for displaying a difference in the Abbe number of an ocular optical lens to facilitate visual appreciation and understanding of the difference by a layperson. The apparatus and method indicates a degree of chromatic aberration at each point of a spectacle lens by inputting data corresponding to an Abbe number and outputting a representation of a region of comfortable vision. A plurality of the data may be obtained using a plurality of spectacle lenses having different Abbe numbers. On a single screen, the invention displays an image of the shape of a spectacle frame, a plurality of regions of comfortable vision (as a circle, ellipse or another closed curve, for example) and the difference in vision due to the difference in the Abbe number is evaluated from the display.
摘要:
A electric motor, which drives a fluid pressure pump used to derive a steering assist force, is controlled in a required manner using a simplified arrangement. Specifically, a pump 11 which feeds a fluid pressure in order to produce an assist force is driven by a D.C. brushless motor 11 which is provided with means 18 for detecting a rotational position of a rotor 23 thereof. Motor control means 14, 15 drives and controls the motor to rotate at a given number of revolutions. Vehicle speed detecting means 16 detects a running speed of a vehicle. The motor control means controls the number of revolutions of the brushless motor on the basis of information representing a vehicle speed, a number of revolutions of the rotor which is determined by utilizing a signal from the rotor position detecting means, and information from means which detect a steer angle and a steering angular rate.
摘要:
The invention provides an automatic lens meter comprising an optical system forming a pattern image by projecting a pattern created by a pattern creating member and measuring optical properties of a lens based on the displacement of the pattern image from a baseline position wherein the examined lens is not in the path of rays in the optical system to a measuring position wherein the examined lens is in the path of the rays. The lens meter includes an image sensor for detecting the position of the pattern image using four line sensors 10a, 10b, 10c and 10d disposed on a pattern image forming plane and arranged in a cross shape, and the pattern creating member forms a pattern image having a quadrangular shape on the pattern image forming plane so that each line sensor intersects a side of the quadrangle, thereby facilitating accurate measurement of desired optical properties.
摘要:
Disclosed is a power steering system comprising: a control valve disposed in the steering mechanism to selectably supply a working liquid supplied from a first pump or a second pump to a pair of pressure chambers of a power cylinder providing a steering force for at least one steered wheel in accordance with a rotational steering operation of a steering wheel; a first switching valve disposed between the first pump and the control valve to switch a communication and an interruption of the working liquid between the first pump and the control valve; and a second switching valve disposed between the second pump and the control valve to switch the communication and the interruption of the working liquid between the second pump and the control valve, a communication state and an interruption state being selectably formed in the second switching valve when the first switching valve is in the communication state.
摘要:
The present invention provides an inexpensive and convenient method and apparatus for measuring light transmittance of an optical lens having refractive power. The method comprises obtaining the light transmittance of an examined lens from a value corresponding to a ratio between the intensity of measured light detected by a light detector when the examined lens is placed in the path of the measured light emitted from a light source and an intensity of measured light detected by the light detector when there is no lens undergoing examination placed in the path of the measured light so that the measured light does not pass through an examined lens and provides a baseline value. Specifically, the present invention focuses (converges) the measured light at or in a vicinity of a position where the examined lens is disposed when the examined lens is placed in the path of the measured light.
摘要:
A spectacle lens image sensing processing apparatus irradiates the convex surface of a lens to be examined with light from a light source, projects an image of the convex surface onto a reflection screen placed on the concave surface side of the lens. The apparatus senses the image of the convex surface, projected on the reflection screen, by using an image sensing unit, and performs image processing for the image of the convex surface sensed by the image sensing unit by using an image processing unit, thereby detecting optical characteristics of the lens. The image sensing unit is placed together with the light source on the convex surface side of the lens. The image of the convex surface of the lens is reflected by the reflection screen to return to the convex surface side of the lens, thereby forming the image on the image sensing unit. A spectacle lens positioning method is also disclosed.
摘要:
The present invention provides a method and apparatus for automatically and continuously conducting the layout analysis, the blocking (attachment) of an uncut lens to a lens holder, and the process of grinding an edge of three types of lenses, such as a single-vision lens, a progressing multifocal lens and a multifocal lens, utilizing a calculated approximation of the optical center of the uncut lens and by determining the position to which a lens holder should attach to the uncut lens.
摘要:
An electric motor for driving an oil pressure pump which feeds pressurized oil to a power cylinder comprises a brushless d.c. motor. An onboard main battery comprises a main battery which is onboard an electrically driven vehicle and which is constructed as a high tension d.c. voltage source delivering a high voltage on the order of 96 to 600V. The battery is directly connected to the motor, and a controller is connected therebetween to provide a pulse width modulated variable voltage signal to the motor from the battery.