Hirose Electric Company, Ltd.

Sansui Electric Co., Ltd.

Oki Electric Industry Co., Ltd.

Gakken Co., Ltd. Kabushiki Kaisha Gakushu Kenkyusha

Fumio Kobayashi

Ikujiro Mitani

Norihide Kawanami

Masaaki Ueno

Kazuyuki Tajima

Junichi Yamamoto

Shozo Koshigoe

Nobuaki Ban

Shigemitsu Fujisawa

Ikujirou Mitani

Yousuke Igeta

Sachio Henmi

Masao Iwaoka

Masanobu Sakurai

The present invention relates to an estimation system that can provide a highly reliable estimation result when the estimation system estimates person-hours required to prepare a film pattern for a circuit to be printed on a board. Upon receiving design conditions from a cline machine, a reference pin calculator of the estimation system calculates a number of reference pins on the basis of a total number of pins extending from parts to be integrated on the printed circuit board and a special specification requirement to be applied to the printed circuit. An additional pin calculator calculates a number of additional pins on the basis of a signal line wiring method. A total estimated pin calculator corrects a sum of the reference pins and the additional pins on the basis of design difficulty, which is determined from a number of signal layers to be made in the printed circuit, a number of signal lines arrangeable between adjacent pins and a pin density, to calculate a total estimated number of pins. A person-hour calculator calculates person-hours required to prepare a pattern film of the printed circuit by dividing the total estimated number of the pins by an average number of pins handleable by a design engineer per a unit time.

System and program for estimating person-hours required to prepare a pattern film of a circuit to be printed on a board

A low profile electrical connector for mounting on a printed circuit board, which includes a substantially rectangular housing (1) made from a conductive material and having a mounting leg (5) extending downwardly from a side thereof; a dielectric block (2) fitted into a bottom of the housing and having a supporting rib (6) extending upwardly from an upper surface thereof and a slot (7) extending downwardly along a side of the supporting rib; a substantially U-shaped contact element (3) made from a conductive sheet and fitted over the supporting rib, the contact element having a short leg (8) bent outwardly for making a resilient contact portion and a long leg (9) projecting downwardly from the dielectric block through the slot for making a connection portion.

Low profile electrical connector for printed circuit board

A coaxial cable connector includes a tubular L-shaped outer conductive shell (1) having a trunk portion (5) with a coupling opening (8) and an arm portion (7) extending laterally from said trunk portion and having a connection opening (9); an L-shaped dielectric body (2) placed in the conductive shell and having an L-shaped channel (12) therein; and an L-shaped central terminal (3) placed in the L-shaped channel and having an annular connection portion (3B) with a slit for connection with a central conductor (24) of a coaxial cable (20).

Connector for coaxial cable

A low profile connector for a coaxial cable, which includes a metal shell (1) with a cable gripper (3) extending from a side thereof for gripping the coaxial cable; a dielectric block (2) fitted into the metal shell and having a partition wall (4) for defining a contact recess (5) and a connection recess (6); and a U-shaped contact element (10) with a pair of leg members (11, 12) fitted into the contact and connection recesses, respectively, such that a leg member with a connection slit (12A) bites into a dielectric body of the coaxial cable and comes into contact with a central conductor by an insulation replacement technique while the other leg member is supported by the partition wall for contact with a contact element of a mating connector.

Low profile coaxial connector

A coaxial cable connector includes a tubular outer conductive shell (1) having a coupling opening (8), a slit (5A) extending upwardly from the coupling opening, and an annular groove (10) on an outside surface adjacent the coupling opening; and a stop ring (11) loosely fitted over the annular groove and having a polygonal inner face.

A female coaxial connector having a substantially cylindrical conductive shell with an opening for receiving the columnar connecting portion of a male coaxial connector, which comprises a female contacting portion provided within the opening and having at least one pair of contact fingers extending in the circumferential direction so as to give elasticity and defining a clearance communicating with the opening, and a protective member provided in contact with or in the proximity of the outside of the female contacting portion for the protection thereof. A method of making a female coaxial connector, which comprises the steps of stamping conductive shells and protective members in integral form, folding the integral conductive shell and protective member at a bend to form a double structure, and making the double structured conductive shell and protective member into cylindrical form, followed by the insertion of an assembly of a dielectric body and a female terminal into the conductive shell.

Female coaxial connector and method of making the same

An L-type coaxial plug connector adapted to be connected to one end of a coaxial cable has a crimp sleeve on the outer sheath of the coaxial cable and adapted to be collapsed so as to fix the coaxial cable to the plug connector. The outer shell has a cylindrical portion holding a dielectric member in which the central terminal is fixed, a cylindrical outer conductor fitting portion adapted to be inserted into the boundary between the inner dielectric layer and the outer conductor of the coaxial cable, and an intermediate portion which extends axially from a portion of the upper circumferential edge of the cylindrical portion so as to connect the portion of the cylindrical portion to the corresponding portion of the lower circumferential edge of the outer conductor fitting portion, such that the axes of said cylindrical portion and the outer conductor fitting portion extend in parallel with each other. The intermediate portion has a U-shaped arm portion which extends from the intermediate portion in the direction perpendicular to the axis of the cylindrical portion, and a cover portion which is adapted to cover the adjacent open end of the cylindrical portion when the intermediate portion is flexed substantially orthogonally towards the U-shaped arm portion.

L-type coaxial plug connector

Audio-visual sheet player

A loudspeaker device comprises a bass reflexing duct formed on an enclosure on which the loudspeaker unit is provided, a passive radiator provided on the enclosure; an acoustic impedance body provided between at least one of the duct and passive radiator and the loudspeaker unit, so that the resonance frequencies of the duct and the passive radiator are different from each other thereby to markedly improve the low acoustic compass characteristic thereof.

Loudspeaker device

A coil mount structure for use in a loudspeaker of moving coil type is disclosed which comprises a generally cylindrical member at around one end portion of which a center peripheral portion of a diaphragm and an inner peripheral edge portion of a damper are removably fixed and at around the other end portion of which a coil is provided.

Coil mount structure

In order to improve characteristics of localization of sound images and a listener's sense of stereophonic perspective, a loudspeaker system for a stereophonic sound reproduction system comprises a main speaker adapted to be driven by audio input signal and radiate acoustic energies toward a listener for stereophonic reproduction, and a subspeaker adapted to be driven by the input signal and radiate out-of-phase acoustic energies which are smaller in magnitude than the acoustic energies provided by the main speaker and reach the listener with a time delay.

Loudspeaker system for use in a stereophonic sound reproduction system

A loudspeaker device, wherein a speaker cabinet fitted with a speaker unit is filled with flexible gas-bearing material and fibrous cotton-like material. According to this invention, it is possible to increase the apparent inner volume of the cabinet, prevent the generation of a standing wave and reproduce sounds with a good quality.

A sound reproducing device comprising a first (low frequency) speaker and a second (high frequency) speaker, the high frequency speaker mounted within its own housing which allows rear-cone radiation out the housing sides, in addition to front-cone radiation out the front, thereby improving radiation efficiency and transient response.

Growing community of inventors

Tokyo, Japan

Fumio Kobayashi