Device with rechargeable battery

• US 20020043957A1
• Filed: 04/12/2000
• Published: 04/18/2002
• Est. Priority Date: 04/14/1999
• Status: Abandoned Application

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Krainer, Erich
• Application Number:
  US09/548,305
• Publication Number:
  US 20020043957A1
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: A61C 17/224 Electrical recharging arrangements
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

In a device (1) with a housing (2) and a rechargeable battery (5) accommodated in the housing (2), the rechargeable battery (5) lies at least with a portion (28) thereof inside a secondary coil (9) of a transformer (10) of charging means (8), while preferably magnetic field shielding means (29) are provided which are arranged parallel to the rechargeable battery (5), which lie with a portion (30) thereof inside the secondary coil (9), and by means of which the magnetic field permeating the secondary coil (9) can be concentrated and thus be kept away from the rechargeable battery (5).

Claims

1. A device (1)

with a housing (2),

with a rechargeable battery (5) accommodated in the housing (2), and with charging means (8) which are arranged in the housing (2), which are designed for charging the battery (5), and which comprise a substantially hollow cylindrical secondary coil (9) of a transformer (10) whose primary coil (22) is arranged in a charging station (25) for the device (1), characterized in that the rechargeable battery (5) lies at least with a portion (28) thereof inside the secondary coil (9).

2. A device (1) as claimed in claim 1, characterized in that the rechargeable battery (5) has a substantially elongate and preferably cylindrical shape and projects fully through the secondary coil (9).

3. A device (1) as claimed in claim 2, characterized in that magnetic field shielding means (29) are provided which are arranged substantially parallel to the longitudinal direction of the rechargeable battery (5), which lie at least with a portion (30) thereof inside the secondary coil (9), and by means of which the magnetic field permeating the secondary coil (9) can be concentrated and thus be kept away from the rechargeable battery (5).

4. A device (1) as claimed in claim 3, characterized in that the magnetic field shielding means (29) comprise a ferrite part which is present next to the rechargeable battery (5) and which projects through the full length of the secondary coil (9).

5. A device (1) as claimed in claim 4, characterized in that the ferrite part forming the magnetic field shielding means (29) has the form of a cylindrical rod which projects through the full length of the secondary coil (9).

6. A device (1) as claimed in claim 3, characterized in that the magnetic field shielding means (29) comprise a short-circuiting winding in the form of a hollow cylinder which surrounds the rechargeable battery (5) at least in the region of a portion (L1) of its longitudinal dimension and which projects through the full length of the secondary coil (9).

7. A device (1) as claimed in claim 6, characterized in that the short-circuiting winding forming the magnetic field shielding means (29) is formed by a hollow cylindrical metal part.

8. A device (1) as claimed in claim 7, characterized in that the metal part is formed by a deep-drawn tube.

9. A device (1) as claimed in claim 6, characterized in that the magnetic field shielding means (29) comprise in addition to the hollow cylindrical short-circuiting winding a ferrite part which is arranged next to the rechargeable battery and which projects through the full length of the secondary coil.

10. A device (1) as claimed in claim 1, characterized in that the device (1) is constructed as an electrically operable toothbrush.