Solar powered hearing aid

• US 5,253,300 A
• Filed: 06/25/1991
• Issued: 10/12/1993
• Est. Priority Date: 03/22/1991
• Status: Expired due to Fees

• Current Assignee: H C Knapp Sound Technology Incorporated
• Original Assignee: H C Knapp Sound Technology Incorporated
• Inventors: Knapp, Herbert C.
• Primary Examiner(s): Ng, Jin F.
• Assistant Examiner(s): Le, Huyen D.
• Application Number:
  US07/720,654
• Time in Patent Office: 840 Days
• Field of Search: 381/69.2, 381/69, 381/68.7, 381/68, 381/68.4, 381/68.2, 381/68.6, 136/256, 136/291, 439/39, 439/38, 439/40
• US Class Current: 381/323
• CPC Class Codes: H04R 2225/31 Aspects of the use of accumulators in hearing aids, e.g. rechargeable batteries or fuel cells
• CPC Class Codes: H04R 25/602 of batteries
• CPC Class Codes: Y10S 136/291 Applications

Abstract

Hearing aids include rechargeable batteries and contacts accessible from outside of the hearing aid casing for the battery. A charging case includes solar cells mounted on the charging case for outputting energy for charging the batteries in the hearing aids. The charging case may include silos for supporting an over-the-ear hearing aid or a recess for receiving a volume control on the hearing aid.

Claims

1. In combination, a charger for a hearing aid and a hearing aid including a battery, comprising:

a charger box, said box including contacts carried on a surface of said casing, said contacts coupled to a source of charging energy; and

terminals on said hearing aid coupled to said hearing aid battery, said terminals on said hearing aid adapted to connect with said contacts;

wherein said contacts and said terminals are magnetic and one of said contacts and said terminals has a magnetic force which magnetically attracts the other one of said contacts and said terminals whereby said hearing aid is attracted to a position where the hearing aid terminals are connected to the contacts such that energy from said source of charging energy is input to said battery and said battery is charged when said contacts on said box and said hearing aid terminals are interconnected, and said charger box further includes a recess and said hearing aid further includes a volume control, whereby said volume control is received in said recess when said hearing aid terminals are connected to said contacts to insure the polarity of the hearing aid batteries is the same as the polarity of the charger contacts.

2. The charger and hearing aid as defined in claim 1, wherein one of said contacts at least partially encircles said recess and another one of said contacts at least partially encircles said one of said charger contacts.

3. The charger and hearing aid as defined in claim 1, wherein said hearing aid is an in-the-canal hearing aid.

4. The charger and hearing aid as defined in claim 1, wherein said hearing aid is an in-the-ear hearing aid which includes internal solar cells.

7. The charger as defined in claim 1, wherein one contact of said charger connector at least partially encircles said recess and another contact of said charger connector at least partially encircles said one charger contact.

8. The charger as defined in claim 1 wherein said source includes a solar cell.

5. A charger for a hearing aid having a rechargeable battery and magnetic terminals coupled to the rechargeable battery, comprising:

a casing including a source of charging energy carried in said casing;

at least one connector coupled to said source of charging energy, said at least one connector adapted to connect with first and second terminals of a hearing aid whereby energy output by said source of charging energy can be coupled to a battery mounted within the hearing aid;

wherein said at least one connector includes at least one magnetic contact such that the terminals of the hearing aid and said at least one contact are magnetically attracted to assist in positioning the terminals of the hearing aid on said contacts for charging the battery in the hearing aid from said source of charging energy, and said casing further includes a recess whereby a volume control on the hearing aid is received in said recess when terminals of the hearing aid are connected to said at least one connector to insure the polarity of the hearing aid battery is the same as the polarity of said at least one contact of said connector.

6. The charger as defined in claim 5, wherein said casing further includes an LED coupled to said at least contact which is illuminated when the hearing aid terminals are connected to said at least one contact such that a circuit within said charger is completed by the hearing aid.