Patent ID: 11968508
Assignee: PANASONIC AUTOMOTIVE SYSTEMS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electroacoustic transducer comprising:
a diaphragm which vibrates to produce sound or which is vibrated by sound;
a first sliding component which is tube-shaped and surrounds an outer peripheral portion of the diaphragm;
a second sliding component which is ring-shaped and is attached to an outer rim of the diaphragm; and
a first low-friction membrane which is interposed between the inner peripheral surface of the first sliding component and an outer peripheral surface of the second sliding component, the second sliding component being slidable against the first low-friction membrane such that the second sliding component is slidable relative to the first sliding component,
wherein the first low-friction membrane includes:
a swollen body which includes a first polymer chain and a plurality of second polymer chains which branch from the first polymer chain as side chains; and
a grease which permeates the plurality of second polymer chains.