Patent ID: 11895475
Assignee: ALPS ALPINE CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A speaker comprising:
a vibration part that includes a diaphragm and a voice coil;
a magnetic circuit part that applies a magnetic field to the voice coil; and
a supporting body that supports the vibration part and the magnetic circuit part,
wherein the supporting body includes a cover member that covers the vibration part from one of vibration directions of the vibration part, and a duct that causes a space between the vibration part and the cover member to communicate with outside space situated outward of the cover member,
wherein at least a part of the cover member has a recessed portion recessed in a direction away from the vibration part, and an interval between the vibration part and the recessed portion in the vibration directions is wider than an interval at another location in the space between the vibration part and the cover member,
wherein an air flow path is formed in an inside of the recessed portion, and the air flow path communicates with an inside of the duct, and
wherein a circuit part provided on an outer side of the cover member and a heat sink are connected to each other, and at least a part of the heat sink is exposed in the air flow path formed in the recessed portion to allow heat conduction.