Inductive charger for hand held appliances

• US 9,337,675 B2
• Filed: 01/25/2013
• Issued: 05/10/2016
• Est. Priority Date: 01/27/2012
• Status: Active Grant

• Current Assignee: Braun GmbH (The Procter & Gamble Company)
• Original Assignee: Braun GmbH (The Procter & Gamble Company)
• Inventors: Jung, Philipp, Kunath, Ivo, Petzold, Herbert, Stratmann, Martin
• Primary Examiner(s): Levin, Naum B
• Application Number:
  US13/749,732
• Publication Number:
  US 20130193915A1
• Time in Patent Office: 1,201 Days
• US Class Current: 1/1
• CPC Class Codes: A61C 17/224 Electrical recharging arrangements
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H02J 7/0045 concerning the insertion or the connection of the batteries

Abstract

An inductive charger for charging a hand-held appliance is disclosed. The inductive charger includes a charger coil surrounding a magnetic core, the magnetic core forming at least a part of a charger projection, wherein the charger projection is surrounded by the charger coil which is adapted to be inserted, together with the charger projection of the magnetic core, into a charging recess of the hand-held appliance.

Claims

1. An inductive charger for charging a hand-held appliance comprising:

a charger coil surrounding a magnetic core, the magnetic core forming at least a part of a charger projection, wherein the charger projection is surrounded by the charger coil which is adapted to be inserted, together with the charger projection of the magnetic core, into a charging recess of the hand-held appliance;

wherein a housing is provided for accommodating at least a part of electric supply means connected to said charger coil, said housing having a top side surface surrounding said charger projection which projects from said top side surface in a direction substantially perpendicular thereto forming a thorn-like or mandrel-like, cylindrical housing projection;

wherein the charger coil is covered by an insulating cover, said insulating cover comprising a sleeve-shaped insulating cap that is connected at an edge portion with the supporting body, the insulating cover being present in addition to the housing projection into which the assembly of magnetic core, charger coil and insulating cover extends.

2. The inductive charger according to claim 1, wherein the charger coil is directly contacting a peripheral surface of the charger projection of the magnetic core.

3. The inductive charger according to claim 1, wherein the charger coil is, at least in part, received and held in place within the interior of a housing projection forming holding means for holding the hand-held appliance in a predetermined storage and/or charging position.

4. The inductive charger according to claim 1, wherein the magnetic core is supported by and/or rigidly fixed to a supporting body adapted to extend along a top side housing wall portion.

5. The inductive charger according to claim 1, wherein the supporting body has at least one, supporting wing extending from a holding portion holding the magnetic core, the supporting wing having at least one engagement portion adapted to engage with a housing portion.

6. The inductive charger according to claim 5, wherein the supporting body is provided with a pair of the supporting wings extending to opposite sides of the magnetic core.

7. The inductive charger according to claim 1, wherein the supporting body and a housing portion include form-fitting and/or press-fitting recesses and projections for holding the supporting body in place by means of engagement of the form-fitting and/or press-fitting recesses and projections with each other.

8. The inductive charger according to claim 1, wherein the supporting body is provided with a central receiving recess for receiving a portion of the magnetic core, the receiving recess being adapted to the magnetic core in shape to hold the magnetic core in a defined position relative to the supporting body.

9. The inductive charger according to claim 1, wherein the supporting body is provided with a supporting portion for supporting a circuit board for providing the charger coil with electric power, the supporting body being provided with electrical connectors for connecting the charger coil with the circuit board.

10. The inductive charger according to claim 9, wherein the electrical connectors include connector pins held in place by and extending through the supporting body, the connector pins, at one side of the supporting body being connected to the charger coil and, at an opposite side of the supporting body being connected to the circuit board.

11. The inductive charger according to claim 1, wherein the charger coil is covered by an insulating cover, the insulating cover including a molded insulating layer connected at an edge portion with the supporting body.

12. The inductive charger according to claim 1, wherein the magnetic core has an elongate, pin-like or cylindrical shape.

13. A hand-held appliance for personal care comprising an inductive charger as defined by claim 1, and further comprising a handpiece including a rechargeable battery which is chargeable by the inductive charger.

14. The hand-held appliance according to claim 13, wherein the handpiece includes a charging recess into which the charger projection of the inductive charger is insertable, wherein the handpiece includes a secondary coil surrounding the charging recess such that the charger coil is, at least in part, received within the interior space surrounded by the secondary coil of the handpiece when the charger projection is inserted into the charging recess.

15. The hand-held appliance according to claim 13, wherein the hand-held appliance is an electric toothbrush.