Kabushiki Kaisha Audio Technica

Mitsuo Miyata

Hiroyuki Suzuki

Yosuke Sato

Okitsugu Furuya

Hideto Hikichi

A moving-magnet type pickup cartridge is disclosed, which includes a cantilever, a stylus chip attached to a front end part in a longitudinal direction of the cantilever, a damper disposed at a base end part in the longitudinal direction of the cantilever and configured to support the cantilever in a swingable manner, a magnet disposed in the longitudinal direction of the cantilever and immediately above the stylus chip at the front end part of the cantilever, and configured to vibrate with vibration of the stylus chip, and a yoke formed in a U-shape, having generating coils being wound thereon, and having magnetic poles at both leg parts thereof being disposed to face the magnet. With this configuration, there is provided a moving-magnet type pickup cartridge enables not only to ensure a large output signal but also to obtain a faithfully reproduced sound with little distortion.

Moving-magnet type pickup cartridge

Provided are a vibration unit which includes a pair of right and left coils that vibrate in response to vibration of a stylus attached to a cantilever and a magnetic circuit which includes a magnet and a pair of yokes and forms a magnetic path. The coils to be disposed in a gap between the pair of yokes are flat coils having perfect circular shapes, and V-shaped notches are formed on opposing surfaces, with the coils interposed therebetween, of the pair of yokes. An intersection angle of the V-shaped notch is set to be an angle to allow channel separation between right and left output signals to be obtained by the pair of coils to be equal to or larger than 20 db.

Moving-coil type stereo pickup cartridge

Headphones capable of giving an optimum mounting feeling to the head of everybody by merely being mounted and without special adjustment, and also capable of being mounted for many hours without giving stress to the user. A headphone cabinet is connected to one end of a link arm, a head pad is provided at the other end of the link arm, and a lateral pressure produced by a spring member is distributed to the headphone cabinet and the head pad via the link arm.

Headphone

In headphones in which headphone units are worn on the head via a headband having a predetermined urging force, a substantially constant urging force is always obtained without being influenced by a difference in width and shape of the user's head. In headphonesincluding a headphone unitin which an electroacoustic transducer is incorporated in a housing; and a head wearing means (for example, a headband) for supporting the headphone unitvia a hanger member, the headphone unitbeing held at the ear position of the head in a state of being urged by the head wearing means, the hanger member is a support framearranged around the housingof the headphone unit, and the headphone unitis supported on the support framevia a plurality of constant force spiral springs

Headphones

A marking device is disclosed which efficiently reduces damage affecting the gimbal mechanism even when such is used under sever conditions and is dropped from a high position. A marking device has a support mounted inside a housing, a light source unit holder swingably suspended by the support through a gimbal mechanism, and a light source unit mounted on the light source unit holder so as to diffuse a light flux only in a single direction to radiate a line of light. The support is coupled with said housing 1 through dampers with upper portion and lower portion formed of an impact absorber, and when outside impact is applied, the damper absorbs impact energy to prevent the impact force from being transmitting to the support.

Marking device

A head-phone having a case member storing therein a headphone unit, wherein a coating film containing a light discolor pigment to be discolored by irradiation of sun light is provided on the whole surface or a predetermined surface of the case member.

Growing community of inventors

Machida, Japan

Mitsuo Miyata