Magnetic head apparatus, magnetic head supporting mechanism and magnetic recording apparatus

• US 20040090710A1
• Filed: 06/27/2003
• Published: 05/13/2004
• Est. Priority Date: 06/28/2002
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation), TDK Corporation
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation), TDK Corporation
• Inventors: Kurihara, Katsuki, Honda, Takashi, Ueno, Yoshihiro, Kuwajima, Hideki
• Granted Patent: US 7,035,054 B2
• Time in Patent Office: Days
• US Class Current: 360/244.8
• CPC Class Codes: G11B 5/484 Integrated arm assemblies, e.g. formed by material deposition or by etching from single piece of metal or by lamination of materials forming a single arm/suspension/head unit

Abstract

A load beam is provided with a base plate and a slider. A magnetic head apparatus is fixed to a head arm via a base plate. In a mechanism or structure for supporting such a magnetic head supporting mechanism, an elastically deformable portion is provided between the base plate and the load beam. Thus, a floating structure that allows the load beam to swing is formed about the elastically deformable portion. In addition, a weight of the load beam is balanced with respect to the elastically deformable portion. Furthermore, a contact portion for applying pressure to the load beam is provided on the head arm so that a pressing load to a recording medium would be set by an amount of rotation of the load beam caused by the pressure applied by the contact portion.

Claims

1. A magnetic head apparatus comprising:

a load beam to which a floating type slider is attached;

an elastically deformable portion provided on the load beam, so that a floating structure that allows said load beam to swing is formed about said elastically deformable portion; and

a load generating portion;

wherein, a position of said load generating portion is adapted to coincide with a center of mass of said load beam; and

a pressing load of said slider against a recording medium is set by a pressure generated at said load generating portion.

2. A magnetic head apparatus according to claim 1, wherein balancing about said center of mass is attained by means of a dead weight made of a vibration damping member.

3. A magnetic head apparatus according to claim 2, wherein said dead weight is made of a resin.

4. A magnetic head apparatus according to claim 1, wherein said load beam is made of a resin.

5. A magnetic head apparatus according to claim 4, wherein said resin comprises an electrically conductive resin so that it would be in electrical contact with an external member.

6. A magnetic head apparatus according to claim 4, wherein an electrically conductive coating is formed on said resin so that it would be in electrical contact with an external member.

7. A magnetic head apparatus according to claim 1, further comprising a head arm that is supported in such a way as to be pivotable to move in a radial direction of said recording medium, said head arm has a strengthen plate that is attached to said head arm perpendicularly in such a way that it would not interfere with said recording medium.

29. A magnetic recording apparatus equipped with a magnetic head apparatus according to claim 1.

8. A magnetic head apparatus comprising:

a load beam to which a floating type slider is attached;

an elastically deformable portion provided on the load beam, so that a floating structure that allows said load beam to swing is formed about said elastically deformable portion;

a projecting portion for generating a load disposed in the vicinity of said elastically deformable portion of said load beam; and

a pressure receiving surface provided on said load beam for receiving a pressure from said projecting portion;

wherein, a position of said projecting portion for generating a load is adapted to coincide with a center of mass; and

a pressing load of said slider against a recording medium is set by a pressure applied to said pressure receiving surface.

9. A magnetic head apparatus according to claim 8, wherein balancing about said center of mass is attained by means of a dead weight made of a vibration damping member.

10. A magnetic head apparatus according to claim 9, wherein said dead weight is made of a resin.

11. A magnetic head apparatus according to claim 8, wherein said load beam is made of a resin.

12. A magnetic head apparatus according to claim 11, wherein said resin comprises an electrically conductive resin so that it would be in electrical contact with an external member.

13. A magnetic head apparatus according to claim 11, wherein an electrically conductive coating is formed on said resin so that it would be in electrical contact with an external member.

14. A magnetic head apparatus according to claim 8, further comprising a head arm that is supported in such a way as to be pivotable to move in a radial direction of said recording medium, said head arm has a strengthen plate that is attached to said head arm perpendicularly in such a way that it would not interfere with said recording medium.

30. A magnetic recording apparatus equipped with a magnetic head apparatus according to claim 8.

15. A magnetic head apparatus comprising:

a base plate adapted to be attached to a head arm;

a load beam that extends from the base plate;

a floating type slider attached to said load beam;

an elastically deformable portion provided between said base plate and said load beam, so that a floating structure that allows said load beam to swing is formed about said elastically deformable portion;

a projecting portion for generating a load disposed in the vicinity of said elastically deformable portion of said load beam;

a pressure receiving surface provided on said load beam;

wherein, a position of said projecting portion for generating a load is adapted to coincide with a center of mass;

a pressing load is applied to a surface of a recording medium via said floating type slider; and

a pressing load of said slider against the recording medium is set by a pressure applied to said pressure receiving surface.

16. A magnetic head apparatus according to claim 15, wherein balancing about said center of mass is attained by means of a dead weight made of a vibration damping member.

17. A magnetic head apparatus according to claim 16, wherein said dead weight is made of a resin.

18. A magnetic head apparatus according to claim 15, wherein said load beam is made of a resin.

19. A magnetic head apparatus according to claim 18, wherein said resin comprises an electrically conductive resin so that it would be in electrical contact with an external member.

20. A magnetic head apparatus according to claim 18, wherein an electrically conductive coating is formed on said resin so that it would be in electrical contact with an external member.

21. A magnetic head apparatus according to claim 15, further comprising a head arm that is supported in such a way as to be pivotable to move in a radial direction of said recording medium, said head arm has a strengthen plate that is attached to said head arm perpendicularly in such a way that it would not interfere with said recording medium.

31. A magnetic recording apparatus equipped with a magnetic head apparatus according to claim 15.

22. A magnetic head supporting mechanism comprising:

a magnetic head apparatus including a base plate and a load beam extending from the base plate;

a head arm attached to said base plate;

a floating type slider attached to said load beam;

an elastically deformable portion that is flexible provided between said base plate and said load beam so that a floating structure that allows said load beam to swing is formed about said elastically deformable portion; and

a projecting portion for generating a load disposed in the vicinity of said elastically deformable portion of said load beam, said projecting portion for generating a load being provided on said head arm and being adapted to apply a pressure to said load beam;

wherein a position of said projecting portion for generating a load is adapted to coincide with a center of mass;

a pressing load is applied to a recording medium via said floating type slider; and

said pressing load to said recording medium is set by an amount of rotation of said load beam caused by the pressure applied by said projecting portion for generating a load.

23. A magnetic head supporting mechanism apparatus according to claim 22, wherein balancing about said center of mass is attained by a dead weight made of a vibration damping member.

24. A magnetic head supporting mechanism according to claim 23, wherein said dead weight is made of a resin.

25. A magnetic head supporting mechanism according to claim 22, wherein said load beam is made of a resin.

26. A magnetic head supporting mechanism according to claim 25, wherein said resin comprises an electrically conductive resin so that it would be in electrical contact with an external member.

27. A magnetic head supporting mechanism according to claim 26, wherein an electrically conductive coating is formed on said resin so that it would be in electrical contact with an external member.

28. A magnetic head supporting mechanism according to claim 22, further comprising said head arm is supported in such a way as to be pivotable in a radial direction of said recording medium, said head arm has a strengthen plate that is attached to said head arm perpendicularly in such a way that it would not interfere with said recording medium.

32. A magnetic recording apparatus equipped with a magnetic head supporting mechanism according to claim 22.