Sintai Optical (shenzhen) Co., Ltd.

Asia Optical International Ltd.

Asia Optical Co., Ltd.

Naofumi Imai

Tomoya Takahashi

Takayuki Karasawa

Chikashi Tsuchiya

I-Jen Lai

Masahiro Koike

A rotating cylinder device includes a cylindrical belt having an axis line, several plate-shaped parts, several link mechanisms, and a cylindrical casing. The plate-shaped parts are disposed outside the belt and arranged symmetrically across the axis line. The link mechanisms are pivotally connected to the respective plate-shaped parts and each have a moving protrusion. The moving protrusions are adapted to move along a first direction parallel to the axis line. The cylindrical casing is adapted to rotate about the axis line and is coupled to the moving protrusions. When the cylindrical casing rotates about the axis line, the moving protrusions are driven to move along the first direction, and the plate-shaped parts are driven by the link mechanisms to move along a second direction perpendicular to the axis line, to contract the belt.

Rotating cylinder device

A headphone is provided. The headphone includes a housing and an speaker. The housing includes a first layer structure, a first receiving space, a first output path, a first trench and a sound output side. The speaker is located in the first receiving space, wherein the speaker includes a first speaker orientation, and the first speaker orientation corresponds to the first output path. The first output path includes the first trench, which is located at the first layer structure, extends around the speaker, and is connected to the sound output side.

Headphone

A headphone is provided. The headphone includes a housing, a first speaker and a second speaker. The housing includes a sound output side, a first layer structure, a first output path, a first trench, a first recess, and a second recess. The first speaker is disposed in the first recess, wherein the first speaker includes a first speaker orientation, and the first speaker orientation corresponds to the first output path. The second speaker is disposed in the second recess. The first output path includes the first trench, which is located at the first layer structure, that extends around the first speaker, and is connected to the sound output side.

A headphone device includes a container and a first electrical connector. The container includes a first loudspeaker disposed in the container, a second loudspeaker disposed in the container, and a first cross-feed loudspeaker disposed in the container. The first electrical connector is disposed on the container, and is electrically connected to the first loudspeaker, the second loudspeaker and the first cross-feed loudspeaker.

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Taichung, Taiwan

Naofumi Imai