Hosiden Corporation

Nec Corporation

Yamaha Corporation

Hosiden Electronics Co., Ltd.

Tomohiko Kamimura

Satoru Fujiwara

Hideo Yuasa

Tomohiro Oda

Koji Nasu

Naoya Fujimoto

Toyofumi Hayashi

Kenji Fukazawa

Hidenori Motonaga

Shushin Noda

Hiroyoshi Shinozuka

Katsunari Fujita

Jinlong Ren

Toshiya Inubushi

Shingo Sato

Masahito Ikeda

Shigeru Sugino

Takuro Michinomoto

Kouji Saitou

Kenji c/o Nec Saitama Ltd Fukazawa

A connection device includes: a pedestal having a placement face; a connector provided in the placement face of the pedestal; a support provided adjacent to the pedestal and extended in a direction crossing the placement surface of the pedestal and having a face to define a space for placing a portable terminal on the connector and on a contact face in the face of the support, the contact face being movable in a thickness direction of the support; and an elastic member that is deformed by the movement of the contact face and applies an elastic force generated by the deformation in a direction of blocking the movement of the contact face with respect to the thickness direction of the support.

Connection device

An electroacoustic transducing device such as a small speaker or receiver used in a portable telephone or the like. A yoke-integral frame is formed by a simple process, and the number of components and production steps for producing the electroacoustic transducing device are reduced, thereby improving productivity. The transducing device having: a magnetic circuit having a yoke, a magnet, and a pole piece; a vibration system having a diaphragm and a voice coil; and a frame which holds the magnetic circuit and the vibration system. The voice coil is placed in a magnetic gap, and the frame is formed by performing a pressing process on one sheet-like metal material into a bottomed tubular shape, and at least two places of the bottom plate being cut and raised to form a bottom frame-like yoke portion, thereby being formed into a yoke-integral type.

Electroacoustic transducing device

The present invention provides a dome-shaped diaphragm fabricated based on a film base of polyethylene terephthalate resin film. The diaphragm includes a first vibrating part of a dome shape or a flat shape, and a second vibrating part of an annular shape. The second vibrating part includes a peripheral portion of the film base provided around a central portion of the film base. The first vibrating part includes the central portion of the film base, a thermosensitive adhesive resin film, provided on the central portion, and a fiber sheet made of a woven fabric using carbon fiber or an embossed nonwoven fabric. The fiber sheet is layered over the central portion with the thermosensitive adhesive resin film interposed therebetween.

Diaphragm including a first vibrating part of a dome shape or flat shape and a second vibrating part of an annular shape and a loudspeaker using the diaphragm

The invention provides a speaker in which a damper is effectively added without impairing the thinness of the speaker, and which, although the speaker is thin and small, exhibits high withstand input and high output power performances. A damper () is disposed between the lower end of a voice coil bobbin () and a magnet () of a magnetic circuit (), and supports a vibration system () in a manner that the system is vibratable with respect to the magnet ().

Speaker

The invention relates to a small speaker. A speakercomprises: a magnetic circuithaving a yoke, a magnet, and a pole piece; a vibration systemhaving a voice coiland diaphragmwhich are joined to each other through a voice coil bobbin; and a framewhich holds the magnetic circuitand the vibration system. The voice coil is placed in a magnetic gap. In the speaker, damperswhich are extended respectively from a plurality of places of an opening side end portion of the voice coil bobbin are disposed, and tip end portions of said dampers are bonded and fixed to the frame. The voice coil bobbin is supported from the lower side. The resistance to input is improved without impairing the thinness of the speaker, and while suppressing the increase of the production cost.

In a portable communication apparatus of the invention, an inner wall () of an openable/closable member () faces the front face of a diaphragm of a close-talking microphone () via a sound path (), and an outer sound hole () faces the rear face of the diaphragm of the close-talking microphone () via a sound path (). An inner sound hole () is biasedly located in a position which is close to a free end of the openable/closable member (), and the outer sound hole () is biasedly located in a position which is close to the center position of opening and closing movements of the openable/closable member (), thereby obtaining a speech quality of a very high S/N ratio at a substantially same degree in both the cases where the openable/closable member () is opened, and where the member is closed.

Portable communication apparatus and microphone device for the apparatus

The present invention relates to an electric acoustic converter used as a speaker or a receiver of a mobile communication device such as a portable telephone or the like. In the electric acoustic converter according to the present invention, the size reduction and thinning of the thickness of the electric acoustic converter can be promoted by providing surface-like rear surface terminals 81 and 82 on the exposed surface 33 which is a rear surface of the yoke 3.

Electric acoustic converter having a rear surface terminal

A hand-free apparatus having improved portability is disclosed. The apparatus includes an apparatus body including a transmitter and a receiver, an input/output cable connected with the transmitter and the receiver and extending outside from the apparatus body, a cable case incorporating a cable spool capable of taking up the cable and a retaining member capable of detachably retaining the apparatus body on the cable case. The apparatus body when retained by the retaining member extends along a peripheral face of the cable spool.

Hand-free apparatus

First ends of first and second band pieces with a shape of a circular arc are rotatably connected with each other such that the angle formed therebetween is prevented from exceeding a predetermined angle. End pieces are slidably mounted respectively on the other ends of the first and second band pieces along the direction of extension thereof and receivers of the headphone are mounted on the respective ends of the end pieces.

Growing community of inventors

Habikino, Japan

Tomohiko Kamimura