Patent attributes
An earphone includes a sound guide tube extending in a uniaxial direction; a speaker offset to one side of a direction orthogonal to the uniaxial direction and on side of a base end of the sound guide tube; a wireless communication board on side of a back face of the speaker with respect to the sound guide tube; and a housing including a front part and rear part, the front part supporting the base end of the sound guide tube and expanding from the base end to the one side via an inclined surface inclining to the uniaxial direction, to accommodate the speaker, and the rear part expanding from the base end to other side of the orthogonal direction to accommodate the wireless communication board, and a distance between central axes of the speaker and the sound guide tube is smaller than an internal radius of the sound guide tube.
