Coil unit and electronic apparatus using the same

• US 8,378,774 B2
• Filed: 05/01/2009
• Issued: 02/19/2013
• Est. Priority Date: 05/12/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Okada, Hirofumi, Kondo, Yoichiro
• Primary Examiner(s): Musleh, Mohamad
• Assistant Examiner(s): Chan, Tsz
• Application Number:
  US12/434,258
• Publication Number:
  US 20090278651A1
• Time in Patent Office: 1,390 Days
• Field of Search: 336/55, 336/179, 336/200
• 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, wherein;

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 is disposed between the non-transmission surface of the coil and the magnetic substance, and directly contacts the magnetic substance.

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 coil being an air-core coil, and

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

4. The coil unit according to claim 1, 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.

5. The coil unit according to claim 4, 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.

6. The coil unit according to claim 5,

the magnetic sheet being a flexible material.

7. The coil unit according to claim 6,

the magnetic sheet contacting the coil and the first substrate.

8. The coil unit according to claim 7, further comprising:

a protection sheet that protects at least the coil and covers both the transmission surface of the first substrate and the coil,

the protection sheet having a position hole that corresponds to a position hole on the second substrate.

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.

11. A coil unit, comprising:

a coil including a coil wire, the coil being an air-core coil and having an air-core;

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, the temperature detection element being disposed in the air-core of the coil, wherein;

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 is disposed between the non-transmission surface of the coil and the magnetic substance.