MAGNETIC HEAD DEVICE

• US 20070146933A1
• Filed: 12/20/2006
• Published: 06/28/2007
• Est. Priority Date: 12/28/2005
• Status: Abandoned Application

• Current Assignee: TDK Corporation
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Matsumoto, Tsuyoshi
• Application Number:
  US11/613,928
• Publication Number:
  US 20070146933A1
• Time in Patent Office: Days
• US Class Current: 360/234.300
• CPC Class Codes: G11B 5/6005 Specially adapted for spacing from a rotating disc using a fluid cushion

Abstract

A magnetic head device is provided. The magnetic head device includes a slider that has a facing side which faces a recording medium, and a pressing side on which a pressing force to a recording medium acts. A magnetic device is provided on the trailing side of the slider. The facing side of the slider is provided with a front positive pressure surface located on the leading side of the slider and a rear positive pressure surface located on the trailing side of the slider. The magnetic device is provided in the vicinity behind the rear positive pressure surface. Air guide grooves are respectively formed on both sides of the rear positive pressure surface, and a part of the rear positive pressure surface exists further behind than the air guide grooves.

Claims

1. A magnetic head device comprising:

a slider that has a facing side, which faces a recording medium, and a pressing side on which a pressing force to a recording medium acts, and

a magnetic device provided on the trailing side of the slider to exhibit at least one function of magnetic recording and magnetic reproducing,

wherein the facing side of the slider is provided with a front positive pressure surface located on the leading side of the slider and a rear positive pressure surface located on the trailing side of the slider, and the magnetic device is provided in the vicinity behind the rear positive pressure surface,

wherein air guide grooves are respectively formed on both sides of the rear positive pressure surface with respect to a reference line that is a virtual straight line which extends from the leading side to the trailing side through the center of the magnetic device, and a part of the rear positive pressure surface exists further behind than the air guide grooves.

2. The magnetic head device according to claim 1, wherein each of the air guide grooves is inclined such that an inside inner wall thereof on the side of the reference line is gradually away from the reference line as it goes to the trailing side.

3. The magnetic head device according to claim 2,

wherein an outside inner wall which faces the inside inner wall of each air guide groove inclines in the same direction as the inside inner wall.

4. The magnetic head device according to claim 2,

wherein an outside inner wall, which faces the inside inner wall of each air guide groove, extends parallel to the reference line.

5. The magnetic head device according to claim 4,

wherein an internal angle between the reference line and the inside inner wall is greater than a maximum value of a tilt angle when the slider moves on the recording medium.

6. The magnetic head device according to claim 1,

wherein the rear positive pressure surface is formed such that its central portion located on the reference line protrudes or is allowed to protrude nearer to the recording medium than its side parts located further behind than a rear end of the air guide groove.

7. The magnetic head device according to claim 5,

wherein the slider is provided with a heater which heats the magnetic device, and the central portion is allowed to protrude by the heat of the heater.

8. The magnetic head device according to claim 1, wherein the magnetic device is operative to perform magnetic recording or magnetic reproducing.

9. The magnetic head device according to claim 1, wherein each of the air guide grooves is inclined linearly or curvedly.

13. The magnetic head device according to claim 1,

wherein an outside inner wall, which faces the inside inner wall of each air guide groove, extends parallel to the reference line.

14. The magnetic head device according to claim 13,

wherein an internal angle between the reference line and the inside inner wall is greater than a maximum value of a tilt angle when the slider moves on the recording medium.

10. A magnetic head device comprising:

a slider that has a facing side which faces a recording medium, and a pressing side on which a pressing force to a recording medium acts, and

a magnetic device provided on the trailing side of the slider,

wherein the facing side of the slider is provided with a front positive pressure surface located on the leading side of the slider and a rear positive pressure surface located on the trailing side of the slider, and the magnetic device is provided in the rear positive pressure surface,

wherein air guide grooves are respectively formed on both sides of the rear positive pressure surface with respect to a reference line that is a virtual straight line which extends from the leading side to the trailing side through the center of the magnetic device, and a part of the rear positive pressure surface exists further behind than the air guide grooves, and

wherein each of the air guide grooves are inclined.

11. The magnetic head device according to claim 10, wherein each of the air guide grooves are inclined linearly or curvedly such that an inside inner wall thereof on the side of the reference line is gradually away from the reference line as it goes to the trailing side.

12. The magnetic head device according to claim 11,

wherein an outside inner wall, which faces the inside inner wall of each air guide groove, inclines in the same direction as the inside inner wall.

15. The magnetic head device according to claim 10,

wherein the rear positive pressure surface is formed such that its central portion located on the reference line protrudes or is allowed to protrude nearer to the recording medium than its side parts located further behind than a rear end of the air guide groove.

16. The magnetic head device according to claim 15,

wherein the slider is provided with a heater which heats the magnetic device, and the central portion is allowed to protrude by the heat of the heater.

17. The magnetic head device according to claim 10, wherein the magnetic device is operative to perform magnetic recording or magnetic reproducing.