Matsushita Electric Industrial Co., Ltd.

Nsk Corporation

Panasonic Corporation

Hiroshi Nishizawa

Hitoshi Watanabe

Makoto Imai

Norihiro Aoki

Koji Takano

Takafumi Yasuhara

Haruo Sekido

Masaru Kuge

Chikara Matsuzawa

Takuya Imaoka

Tatsuo Kobayashi

Katsuaki Kanaya

Manabu Murata

Yutaka Oshima

You Tsuchida

Kouichi Yanagawa

Takashi Shimokawa

Kouji Ugawa

Kimio Tokuda

A martensitic stainless steel containing, by mass %, C: 0.20% to 0.40%, N: 0.1% or less, Mo: 3% or less, and Cr: 12.0% to 16.0%, such that 0.3%&#x2264;C+N&#x2264;0.4% and a PI value (=Cr+3.3Mo+16N) is 18 or more, with the remainder being substantially Fe and unavoidable impurities is quenched from a temperature of 1,030&#xb0; C. to 1,140&#xb0; C. and subjected to a subzero treatment and tempering so as to obtain a prior austenite crystal grain size of a surface layer of 30 &#x3bc;m to 100 &#x3bc;m and a surface hardness of 58 HRc to 62 HRc.

Manufacturing method of mechanical component using martensitic stainless steel, rotating device, rolling bearing and rolling bearing unit

Bearing for a yo-yo

Bearing for yo-yo

A shaft, which supports an inner ring of a bearing and is integrally attached to a linear motion type slider, has a through hole in a center portion thereof. Since correction of the shaft may be performed by grasping a separate shaft to be inserted to the through hole, the shaft is not scratched. Additionally, even after press fitting the bearing, the posture may be corrected without grasping the bearing.

Slide device

A pivot bearingincludes: a shaft; and a plurality of ball bearingswhich are arranged in an axial direction with respect to the shaftand each of which has an inner ringfixed to the shaftand an outer ringfixed to a fixing holeof an armvia a tolerance ring, the pivot bearing being configured to swing around the shaft. The number of balls of each ball bearingand the number of concave portions of the tolerance ring, which are configured to press the outer ring, are relatively prime to each other. Accordingly, it is possible to inexpensively make the reliable pivot bearing that achieves high precision with a simple structure, and thus a reliable high density magnetic recording apparatus is provided.

Pivot bearing and magnetic recording apparatus using the same

An imaging device includes a lens (), an optical filter (), a semiconductor imaging element () having a light receiving section, and a tridimensional substrate () on which the semiconductor imaging element () and the optical filter () are mounted, wherein the tridimensional substrate () has an opening () corresponding to the light receiving section of the semiconductor imaging element (), the semiconductor imaging element () and the optical filter () are located on one side of the opening (), the lens () is located on the other side of the opening (), and the semiconductor imaging element () and the optical filter () are fixed to the tridimensional substrate () under the condition that the semiconductor imaging element () and the optical filter () are curved, and have respective centers moved in a direction away from the lens ().

Imaging device, method for manufacturing the imaging device and cellular phone

An actuator device includes: a piezoelectric element; a weight secured to one end of the piezoelectric element along an expansion-contraction direction thereof; and a drive member secured to another end of the piezoelectric element. The piezoelectric element and the weight are in contact so as to have a spatial overlap with respect to the expansion-contraction direction of the piezoelectric element, and the center of gravity of the weight is positioned in the vicinity of a plane that contains a contact plane in which the piezoelectric element and the weight are in contact.

Piezoelectric actuator device, image pickup unit and mobile terminal apparatus

A lens is provided which is configured so that the dimensional accuracy of the lens surface can be evaluated easily and accurately, and the control of the accuracy of the lens can be easily performed. The lens comprises a lens effective part having lens surfaces formed around an optical axis as the center and an edge part in a doughnut shape as viewed in a plan view, which is extended along the outer periphery of the lens effective part. The edge part and the lens effective part are molded simultaneously, and annular indices around the optical axis as the center, with which the dimensional accuracy of the lens surfaces can be detected, are formed on both the surfaces of the edge part.

Lens, lens unit, and imaging device using the same

It is an object of the present invention to provide an imaging device that, even if the optical axis of the multifocal lens has a deviation resulting from its decentered surfaces, can prevent an image from being deteriorated by the low precision lens. The imaging device comprises a solid state image sensor for taking an image of an object to produce an image signal indicative of the image, an aspherical single focus lens, a bifocal lens disposed in front of the solid state image sensor, the bifocal lens having two focal distances, and an aperture diaphragm located just before the bifocal lens.

Imaging device

An imaging apparatus includes: a three-dimensional substrate in which a partition wall () having an opening () at a central portion is formed so as to cross an inner cavity; an optical filter () that is fixed on a first flat surface () of both surfaces of the partition wall so as to cover the opening; a semiconductor imaging device () that is face-down mounted on a second flat surface () of the partition wall with an imaging area () facing the opening; and an optical system for forming images that is installed on a side of the optical filter in the inner cavity of the three-dimensional substrate. The opening of the partition wall is dosed on both sides with the optical filter and the semiconductor imaging device so as to form a cavity. An air passage () for allowing communication between the cavity and an exterior of the three-dimensional substrate is formed on the first flat surface, and has a labyrinth structure that causes a flow rate of air passing through the air passage to vary depending on a location in the air passage. This allows air circulation between the exterior and a cavity enclosed by a semiconductor imaging device and an optical filter, while suppressing the entry of foreign matter from the exterior into the cavity via an airflow caused by expansion/contraction of air.

Imaging apparatus and method for manufacturing the same

The imaging apparatuscomprises: a semiconductor imaging devicewhich converts incident light to an electrical signal; an optical filterwhich is opposed to an incident surface of the semiconductor imaging deviceand transmits light of a certain wavelength; and a three-dimensional substratefixing the optical filterby means of adhesion using a filler-containing adhesivewherein the diameter of the filler is smaller than or equal to the pixel size of the semiconductor imaging device. Degradation of image quality of the imaging apparatuscaused by the dropped filler can thus be reduced.

Imaging apparatus

Light that has entered a lens held by a barrel portion of a three-dimensional circuit board transmitting virtually no visible light enters a semiconductor imaging device held inside the three-dimensional circuit board. On the side opposite to the barrel portion, the three-dimensional circuit board is provided with a flexible printed circuit for sending a signal to and receiving a signal from the semiconductor imaging device. The region of the flexible printed circuit facing the semiconductor imaging device has sufficient shielding characteristics in a range sensitive to light reception by the semiconductor imaging device. This makes it possible to provide a sufficient shield against a light beam entering from the back surface of the semiconductor imaging device, so that the image quality does not deteriorate even when a conventional shielding sheet is not used. Since the shielding sheet becomes unnecessary, it is possible to reduce the cost of the shielding sheet itself and the number of steps of bonding the shielding sheet. Furthermore, the thickness corresponding to the shielding sheet and the adhesive can be reduced.

Imaging apparatus with three dimensional circuit board

A winding is wound directly on the magnetic head core formed of a single crystal of Mn&mdash;Zn ferrite. The diameter is 20-30 &mgr;m. A high-saturated magnetic flux density material (iron) having a magnetic flux density which is more than 1.3 T covers walls of the magnetic gap using sputtering. A slider including the magnetic head comprises ceramic including titanium calcium. The magnetic head is adhered to the slider with a low melting point glass. In a magnetic recording apparatus including the above-mentioned magnetic head, the slider includes air bearing surface trains arranged in the driving direction of the magnetic recording medium on a contact surface of the slider. Each bearing surface train includes protruding portions and a hollow portion direction. The hollow portion escapes the air between the protruding portion and the recording medium. The head is evacuated from the magnetic recording medium.

Magnetic head including a slider with a hole, a magnetic head core having a magnetic gap, and a winding wound around the magnetic head core

A motor for moving a magnetic head includes a carriage. A suspension supports the magnetic head, and is connected to the carriage. A coil is fixed to the carriage. A guide rod is centered at the coil. A magnet arrangement consists of only two magnets located at positions opposed diagonally with respect to the guide rod.

Growing community of inventors

Kanagawa, Japan

Hiroshi Nishizawa