Hearing aid with adjustable flexible connection member

A hearing aid comprising:

• a first unit including a housing with an amplifier located therein,
• a second unit including an ear plug for insertion in the ear and having an electro-acoustic transducer located therein,
• electrical connecting means for interconnecting the transducer to the amplifier,
• mechanical coupling means for mechanically coupling the first and second units and including a tubular element having a first end coupled to one unit of said first and second units,
• the other unit of said first and second units having a duct in which the tubular element is adapted to slide in a longitudinal direction so that the overall length of the duct and tubular element together is adjustable,
• said electrical connecting means being adapted to pass through the duct and tubular element and having a minimum length so that upon adjustment of the tubular element to a maximum overall length the electrical connecting means is long enough to electrically interconnect the amplifier and transducer,
• and wherein at least one unit of said first and second units includes a space therein for storing any excess length of the electrical connecting means upon adjustment of the tubular element to a position less than said maximum overall length.

A unit adapted to cooperate with an other unit which together form a hearing aid which includes an amplifier and an electro-acoustic transducer, said unit comprising:

• first connecting means adapted for electrically coupling the electro-acoustic transducer to the amplifier,
• an electric terminal electrically coupled to one end of the first connecting means,
• a tubular element having a first end coupled to the said unit, said tubular element accommodating at least a part of the first connecting means, said tubular element being adapted to slide within a duct of the other unit over at least a part of its length and in a longitudinal direction of said duct, and
• the first connecting means being of a length so as to permit electrical coupling between said units when the tubular element has been slid out of the said duct to the maximum permissible extent.

An other unit, adapted to cooperate with a unit having a tubular element, said unit and said other unit together forming a hearing aid which includes an amplifier and an electro-acoustic transducer;

• said unit comprising:
• first connecting means adapted for electrically coupling the electro-acoustic transducer to the amplifier,
• an electrical terminal electrically coupled to one end of the first connecting means,
• a tubular element having a first end coupled to the said unit, said tubular element accommodating at least a part of the first connecting means, said tubular element being adapted to slide within a duct of the other unit over at least a part of its length and in a longitudinal direction of said duct, and
• the first connecting means being of a length so as to permit electrical coupling between said units when the tubular element has been slid out of the said duct to the maximum permissible extent,
• said other unit comprising:
• a duct having a diameter larger than the outer diameter of the tubular element of the unit and adapted to cooperate with the tubular element so that said tubular element can be slid in said duct over at least a part of its length and in the longitudinal direction of said duct, and
• an electrical terminal adapted to be electrically coupled to an end of the first connecting means of the unit.