Harada Industry Co., Ltd.

Japan Aviation Electronics Industry, Limited

Mazda Motor Corporation

Katsushiro Ishibayashi

Hiroyuki Maeda

Kazuya Nakano

Kazuhiko Furukatsu

Satoshi Nagasawa

Makoto Hayashi

Kentaro Toda

Tatsuaki Taniguchi

Kazuo Shigeta

Yoshihiro Sugii

Hajime Saito

A connecting device has a locking mechanism for locking fitting between a first connecting member and a mating side. The locking mechanism has a first elastic body and a second elastic body. The first elastic body has a first contact portion adapted to contact the mating side. The second elastic body has a second contact portion adapted to contact the mating side. At least one of the first elastic body and the second elastic body has a locking portion adapted to lock fitting to the mating side.

Connecting device having a locking mechanism

An antenna main body comprises an antenna element, female connectors provided at a first connector, a female screw section, and an engagement claw inserted into an antenna mount hole H to make engagement with a lower side face of a roof panel R. A fixing member comprises cables, male connectors provided at a second connector, the male connectors being provided to make mechanical engagement with, and electrical connection to, female connectors, and being connected to the cable, and a male screw section helically fitted to a female screw section, thereby tightening the female connectors, the male connectors, and a roof panel R with one another.

Antenna device

Comprised of an antenna base in which a protruding portion is formed on a bottom face and tapered faces are formed on shoulder portions of the protruding portion, a legged washer in which leg portions whose tip ends have an external diameter larger than the internal diameter of a mounting hole and which has an elasticity and leg portions, which are bent into a crank-like section so that the diameter of the tip ends is increased and in which the inside face of the crank portion makes contact with the tapered faces when the axial length of the bolt is decreased with respect to the antenna base by tightening the bolt so that the tip ends are expanded, are formed integrally with the ring portion, and a bolt which is fastened to the protruding portion of the antenna base through the legged washer.

Vehicle roof antenna attachment

In an antenna apparatus for a vehicle, the antenna apparatus being provided on the vehicle in which at least a part of an outside plank panel of the vehicle is constituted by an outer panel made of a synthetic resin material, the antenna apparatus has at least one non-earthed type antenna, the non-earthed type antenna is provided with a first antenna element connected to an inner conductor of a coaxial cable via a first feeding point, and a second antenna element connected to an outer conductor of the coaxial cable via a second feeding point, and at least both the first and second antenna elements and both the first and second feeding points are arranged in a portion which is inside the outer panel made of the synthetic resin material and is apart from the earthed conductor on the part of the vehicle body, thereby it is possible to improve a receiving performance of a radio wave having a short wavelength, and can restrict an influence of a noise.

Antenna apparatus for vehicle

An amplifier comprising a transformer and a plurality of FETs, for example, three FETs. An input terminal, which receives a signal from an FM antenna, is connected to one end of the primary winding of the transformer. A power-supply voltage is applied to one end of the secondary winding of the transformer. A given middle part of the secondary winding is connected to an output terminal. The transistors have their source connected in parallel to the other end of the primary winding of the transformer, their drains connected in parallel to the other end of the secondary winding, and their gates connected to the ground.

Growing community of inventors

Tokyo, Japan

Katsushiro Ishibayashi