Seidensha Electronics Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Katani Sangyo Co., Ltd.

Shigeru Ogaya

Noriaki Matsugishi

Tomotaka Orita

Yasuyuki Sakamoto

Kiyonori Ishida

Masanori Mizutani

Fumio Orito

Kazunori Shimoyama

Toshiyuki Hanada

A pair of thermoplastic resin members are placed on an anvil. A pressing force of a tool horn vibrating ultrasonically in a direction not perpendicular to but along upper surfaces of the pair of thermoplastic resin members is applied to the upper surfaces. The application of the pressing force of the tool horn vibrating ultrasonically allows melting of a vicinity of the upper surfaces of the pair of thermoplastic resin members. A welded structure part is formed on an unwelded structure part, thereby welding the pair of thermoplastic resin members as an overlap structure including the welded structure part arranged on the unwelded structure part. The distance and positional relationship between the pair of thermoplastic resin members after the welding are unchanged before and after the welding. The surfaces, placed on the anvil, of the thermoplastic resin members are neither burned nor discolored.

Ultrasonic welding method, structure welded by ultrasonic welding method, and ultrasonic welding device

A method of securing to an operating lever in the form of an elongated metal plate an operating button made of thermoplastic resin and including a mounting tongue of a generally tubular configuration having a hollow defined therein. An anchor perforation and a stopper pawl are first formed in the operating lever and the operating button is then temporarily mounted on the operating lever with the operating lever slid into the hollow of the mounting tongue until an abutment defined in the mounting tongue and positioned within the hollow is brought into engagement with the stopper pawl. While the operating button is thus temporarily mounted on the operating lever, the operating lever is placed on a support bench with one of opposite surfaces of the operating lever held in contact with the support bench, and a pressure is subsequently applied to an area of the mounting tongue which is substantially aligned with the anchor perforation by means of a presser to thereby form an anchor peg protruding into the anchor perforation in the operating lever.

Method of securing knobs on levers

Growing community of inventors

Osaka, Japan

Shigeru Ogaya