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US 4,736,430 AGranted
Hearing aid
AssigneeRobert Bosch GmbH
InventorKarl-Heinz Schroder
Life of this patent
Estimating the term…
Abstract
To provide for better fitting and pleasing out appearance of a hearing aid having an element introducible into the ear canal of a user, and an externally accessible housing which retains electronic components, a battery, and ON/OFF switch and volume control elements, the housing is formed in spherical or, rather, truncated-spherical shape, removably fitted on a fitting element introduced into the ear canal. This spherical shape is less obtrusive than others, and may be formed similar to costume jewelry.
Claims11
Hearing aid having
- a body defining a housing (11) adapted to be located, at least in part, against an ear canal of an ear of a wearer;
- operating components (20, 22, 27) located within the housing;
- means for defining a sound duct (19) coupled to the housing to transfer sound towards the inner ear of the wearer;
- wherein
- the body defining the housing is essentially in the shape of a truncated sphere formed with a flattened surface (16), said flattened surface extending parallel to a diametrical plane;
- the body is divided along a separating plane (13) essentially parallel to said flattened surface into two parts defining first and second parts (14, 15);
- wherein the first part (14) extends from said separating plane to said flattened surface, and
- the second part (15) is shaped to define an essentially spherical cap, fitted against said separating plane,
- is rotatable with respect to said first part (14), and forms a movable means coupled to the operating components in the housing for controlling volume of sound being transferred to the sound duct (19);
- wherein a hollow cylindrical stub (17) is provided, extending from said flattened surface (16);
- and
- wherein the means for defining the sound duct (19) are fitted against said stub, the sound duct extending through said stub.
9 more elements
A hearing aid having
- a rotation-symmetrical body defining a housing (11) adapted to be located, at least in part, against an ear canal of an ear of a wearer,
- operating components (20, 22, 27) located within the housing;
- means for defining a sound duct (19) coupled to the housing to transfer sound towards the inner ear of the wearer;
- wherein the body defining the housing is essentially in the shape of a truncated sphere formed with a flattened surface parallel to a diametrical plane;
- and an adjustment ring (41) on the housing and forming a movable means, coupled to the operating components in the housing for controlling the volume of sound being transferred to the sound duct.
2 more elements
Dependencies are inferred from the claim text.