Sony Corporation

Osamu Onodera

Heikichi Sato

Katsumi Sakata

Kaoru Aoki

Hitoshi Kimura

Makoto Nagata

Nobuyuki Hara

Dai Yoneya

Yoshihisa Wada

Shinichi Ueda

A cabinet of a projection type display unit includes a base cabinet on which main component parts are mounted, and a top cover made from sheet metal which is mounted so as to cover the base cabinet, wherein a rear face portion of the top cover is formed in the shape of a curved surface being laid-down U-shaped in side view. The U-shaped curved surface is formed on an ergonomic basis, so that the rear face portion can be gripped securely even with one hand. On the back side of the top cover, bosses are integrally formed by use of a resin which is a different material from the sheet metal of the top cover, and the base cabinet and the top cover are fixed by fastening screws to the bosses from the base cabinet side.

Projection type display unit having a curved housing

A magnetic head having a sliding surface () on which a magnetic recording medium is slid, a magnetic gap g formed in the sliding surface for exchanging information signals with the magnetic recording medium, a track width controlling portion for prescribing a track width Tw of the magnetic gap g, with the track width controlling portion being formed by abutting a pair of magnetic core halves () together, there being track width controlling grooves (to) formed in each of the magnetic core halves, metal magnetic films (to) provided in association with the magnetic gap g and with the track width controlling portion, and a groove () formed in at least one end of the magnetic gap g for extending substantially parallel to the sliding direction of the magnetic recording medium. A length L in &#x3bc;m between a first point of intersection P between the track width controlling groove () formed in one of the magnetic core halves () and one lateral edge of the groove () and a second point of intersection Q between the magnetic gap g and the other lateral edge of the groove is related with an intensity of the recording current I [mA] by L&#x2267;11.3&#xd7;ln I&#x2212;21.9. With the magnetic head, demagnetization produced in the recording track of the magnetic tape is prevented from being produced.

Magnetic head

A magnetic head having a sliding surface () on which a magnetic recording medium is slid, a magnetic gap g formed in the sliding surface for exchanging information signals with the magnetic recording medium, a track width controlling portion for prescribing a track width Tw of the magnetic gap g, with the track width controlling portion being formed by abutting a pair of magnetic core halves () together, there being track width controlling grooves (to) formed in each of the magnetic core halves, metal magnetic films (to) provided in association with the magnetic gap g and with the track width controlling portion, and a groove () formed in at least one end of the magnetic gap g for extending substantially parallel to the sliding direction of the magnetic recording medium. A length L in &#x3bc;m between a first point of intersection P between the track width controlling groove () formed in one of the magnetic core halves () and one lateral edge of the groove () and a second point of intersection Q between the magnetic gap g and the other lateral edge of the groove is related with an intensity of the recording current I [mA] by L&#x2267;11.3&#xd7;1nI&#x2212;21.9. With the magnetic head, demagnetization produced in the recording track of the magnetic tape is prevented from being produced.

A magnetic head having a pair of magnetic core halves, at least one of which is formed of a magnetic oxide material portion, a winding groove and a magnetic metal thin film formed on a surface having the winding groove of the magnetic oxide material portion, which are abutted so that a magnetic gap is formed on an abutment surface of the magnetic metal thin film, wherein an entire surface of the winding groove is slanted with angles of 0.degree. to 60.degree. with respect to gap surfaces constituting the magnetic gap.

Growing community of inventors

Saitama, Japan

Osamu Onodera