COIL UNIT AND ELECTRONIC APPARATUS USING THE SAME

• US 20090278651A1
• Filed: 05/01/2009
• Published: 11/12/2009
• Est. Priority Date: 05/12/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: KONDO, Yoichiro, OKADA, Hirofumi
• Granted Patent: US 8,378,774 B2
• Time in Patent Office: Days
• US Class Current: 336/200
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 27/402 Association of measuring or protective means
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10

Abstract

A coil unit includes a coil including a coil wire, a magnetic substance for receiving magnetic force lines generated by the coil, a first substrate, and a temperature detection element disposed on the first substrate.

Claims

1. A coil unit, comprising:

a coil including a coil wire;

a magnetic substance that receives magnetic lines of force generated by the coil;

a first substrate; and

a temperature detection element disposed on the first substrate.

2. The coil unit according to claim 1,

the coil being a flat coil formed by winding the coil wire,

the magnetic substance being a magnetic sheet, and

the first substrate being a flexible substrate.

3. The coil unit according to claim 1,

the first substrate being disposed between the coil and the magnetic substance.

4. The coil unit according to claim 1,

the coil being an air-core coil, and

the temperature detection element being disposed in an air-core of the air-core coil.

5. The coil unit according to claim 1,

if one surface of the coil is referred to as a transmission surface and the other surface of the coil is referred to as a non-transmission surface, the magnetic substance is disposed on a side of the non-transmission surface of the coil, and

the first substrate being disposed between the non-transmission surface of the coil and the magnetic substance.

6. The coil unit according to claim 5, further comprising

a second substrate having a coil housing,

a side surface of the coil housing being one of side surfaces of the second substrate,

the coil being housed in the coil housing,

a first electrode provided on the first substrate being connected to a second electrode provided on the second substrate.

7. The coil unit according to claim 6,

each of the first substrate and the second substrate having a positioning hole through which a fixture is passed at a time of assembly so that the first substrate and the second substrate are positioned.

8. The coil unit according to claim 1,

the coil wire being wound around the magnetic substance so that the magnetic substance is a magnetic core of the coil, and

if one surface of the magnetic substance is referred to as a transmission surface of the coil and the other surface of the magnetic substance is referred to as a non-transmission surface of the coil, the first substrate is disposed on a side of the transmission surface of the coil.

9. The coil unit according to claim 1,

the coil wire being wound around the magnetic substance so that the magnetic substance is a magnetic core of the coil, and

if one surface of the magnetic substance is referred to as a transmission surface of the coil and the other surface of the magnetic substance is referred to as a non-transmission surface of the coil, the first substrate is disposed on a side of the non-transmission surface of the coil.

10. An electronic apparatus comprising

the coil unit according to claim 1.