摘要:
A surface machining method to be adopted when machining a valve mechanism component member is provided so as to manufacture a product assuring a specific pulsation-reducing effect over an extended period of time with a high level of reliability. A plurality of recesses 60 are formed through laser machining over an area (seat surface 51) at a valve plate 2 around an suction port 24, which comes into contact with an suction valve 30, or an area of the suction valve 30 that comes into contact with the valve plate 2. Projections 61 may also be formed through laser machining around the recesses 60. Such projections 61 should be formed so as to assure hardness greater than the hardness of the other areas through radiation of laser light.
摘要:
According to an aspect, an electronic device includes a display unit, and a control unit. The display unit displays information. The control unit determines a scrolling speed of the information in accordance with a speed of an operation, and changes a display size of the information to be scrolled on the display unit in accordance with the scrolling speed.
摘要:
A zoom lens including first to fifth lens units in order from an object side toward an image. The refractive powers of the first to the fifth lens units are positive, negative, positive, negative and positive, respectively. The distance between the first and the second lens units is increased at the time of zooming from the wide angle end to the telephoto end, and the distance between the second and the third lens unit is decreased at the time of zooming from the wide angle end to the telephoto end. The first lens unit and the fourth lens unit are fixed for the zooming. When M2 and M3 are the amounts of movement of the second lens unit and the third lens unit at the time of zooming from the wide angle end to the telephoto end, respectively, the conditional expression; 0.2
摘要:
A zoom lens system includes, in order from an object side to an image side, first, second, third, and fourth lens units having positive, negative, positive, and positive optical powers, respectively. The first lens unit includes one negative lens element and two positive lens elements, and moves during zooming. The zoom lens system satisfies the following condition: 0.05
摘要:
A compact wide converter lens having a small front-lens diameter. When attached to an object side of a main lens system, the wide converter lens provides reduced degradation of aberrations to achieve high optical performance. The wide converter lens includes a first negative lens element disposed most proximate to the object side and whose object-side surface is concave, a second positive lens element disposed at an image side of the first lens element, and a third negative lens element disposed at an image side of the second lens element. The following conditions are satisfied: 1.0
摘要:
Herein disclosed is an illuminated push-button switch structure in which, when the push button is pushed, the push-button guide member united to the button is depressed while being supported to slide by the switch base. Then, the switch lever of the switch mechanism associated with the push-button guide member is abruptly turned back with a predetermined depression stroke to afford a switching feel. This turn prevents further movement of the push button in a predetermined depression direction in order to eliminate any undesired vibration of the push button. Even if the push button is obliquely pushed, it is always prevented from being inclined to provide the stable switching operation at all times.
摘要:
A zoom lens includes a first lens unit with a negative refractive power, a second lens unit with a positive refractive power, and a third lens unit with a positive refractive power in order from the object side to the image side. The first lens unit includes a negative lens and a positive lens. When the curvature radius of the object side surface and that of the image side surface of the negative lens are respectively defined as R11 and R12 and the curvature radius of the object side surface and that of the image side surface of the positive lens are respectively defined as R21 and R22, the following conditional expression is satisfied: −5.6
摘要:
A zoom lens includes, in order from an object side to an image side, first through fourth lens units. The first lens unit has positive refractive power, and the second lens unit has negative refractive power. The third lens unit has positive refractive power, the third lens unit having at least one positive lens and a plurality of negative lenses that include, in order from the object side to the image side, a first positive lens, a first negative lens, and a second negative lens. The fourth lens unit has positive refractive power. The zoom lens performs zooming by changing the distance between the lens units. The first positive lens is a positive lens closest to the object side among the at least one positive lens. The first negative lens is a negative lens closest to the object side among the plurality of negative lenses.
摘要:
A zoom lens has a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, which is moved during zooming, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power, which is moved during zooming, arranged in the mentioned order from the object side to the image side. The zoom lens satisfies the following conditions: 0.15
摘要:
A single vibration sensor producing multistage outputs corresponding to various vibrational acceleration values is disclosed. This vibration sensor is the type in which vibrational acceleration causes a movable gravitation element to move, and the movement of the element exerts pressure on a plunger which actuates a switch mechanism and outputs a signal. A feature of this vibration sensor is the switch mechanism includes a number of discrete switch units each having a different operating sensitivity. The switch units have a number of movable members which are displaced by the plunger when the vibrational acceleration causes the movable gravitation element to move, and a number of fixed contacts corresponding to these movable members with which the movable contacts come in contact. The spatial relationship of the fixed contacts with respect to the movable members is a feature which determines the operational sensitivity.