Mazda Motor Corporation

Masaaki Sakiyama

Kazufumi Adachi

Yasuhiro Ohi

Hisanobu Ino

Ikuyo Ohsugi

Masahiro Iriguchi

Shotaro Hirosue

Yukinori Monden

A resonance tube of a horn according to one aspect of the present invention includes a first resonance tube and a second resonance tube branching from the first resonance tube at a branching portion. The first resonance tube is a resonance tube that resonates with a first sound contained in a chord generated by a diaphragm. The first resonance tube includes: an input opening surface to which the chord is input; and a first opening surface from which the first sound is output. The second resonance tube is a resonance tube that resonates with a second sound contained in the chord. The second resonance tube includes a second opening surface from which the second sound is output. The second opening surface is displaced from the first opening surface in a normal direction K

Resonance tube of horn

Disclosed is a burglar sensor arrangement structure for arranging, with respect to a vehicle interior member (), a burglar sensor configured to detect an intrusion into a vehicle interior. The burglar sensor arrangement structure comprises an ultrasonic wave generation unit () for generating an ultrasonic wave, and a throat portion () for radiating the ultrasonic wave generated in the ultrasonic wave generation unit, from a outside opening () thereof into the vehicle interior, wherein the vehicle interior member is formed with a groove (), and the outside opening of the throat portion is opened at a bottom surface of the groove.

Burglar sensor arrangement structure

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Hiroshima, Japan

Masaaki Sakiyama