Patent ID: 7936893
Filing Date: 2011-05-03
Classification: H04R

Abstract:
1. A hearing aid, comprising: an ear hook bent for attachment to an ear; an earphone linked to a front end side of the ear hook; a main body case linked to a rear end side of the ear hook; and a battery case attached to the main body case, wherein the main body case is formed in a shape that curves downward in a parabolic shape from a front end portion toward a rear end portion, the battery case is installed inside the rear end portion of the main body case, and is removable by turning, the main body case has a fitting-use first communication terminal provided on the radial outside in the main body case, the first communication terminal is electrically connected to a fitting-use second communication terminal inserted from outside the main body case for fitting work, the first communication terminal and the second communication terminal can be visually checked from outside the main body case when the battery case is removed by turning, the battery case has a first locking protrusion that is engaged with the main body case when the battery case is turned for installation, and a pressing protrusion that is opposite the first communication terminal and presses the second communication terminal to the first communication terminal when the battery case is installed for the fitting work, and the turning axis of the battery case is provided on the radial inside in the main body case, and is located above the first locking protrusion of the battery case when the battery case is turned for installation.