Dynamic magnetic information storage or retrieval – Head mounting – For shifting head between tracks
Reexamination Certificate
1999-08-11
2001-06-26
Renner, Craig A. (Department: 2652)
Dynamic magnetic information storage or retrieval
Head mounting
For shifting head between tracks
Reexamination Certificate
active
06252746
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a hard disk drive, and more particularly to an actuator of a hard disk drive, which has a bobbin structured such that it can experience a uniform shrinkage while radiating heat after being injection-molded.
2. Related Art
Generally, a hard disk drive is used as an auxiliary memory of a computer, for recording information on a disk being a recording medium by converting a digital electronic pulse into a more permanent magnetic field or for reading out recorded information from the disk. Such a hard disk drive includes a disk for storing information data thereon, an actuator having a head for recording information to or reading information from the disk, a voice coil motor (VCM) for pivoting the actuator around a pivot shaft to a precise data position on the disk, and an interface for connecting electronic circuits and drives controlling the above components to a computer body.
I have found that unstable formations of bobbins of actuators can be extremely inconvenient. Efforts have been made to improve bobbins and actuators.
Exemplars of recent efforts in the art include U.S. Pat. No. 5,734,528 for Disc Drive Actuator Incorporating Injection Molding, Flying Leads, and Locking Flanges issued to Jabbari et al, U.S. Pat. No. 5,555,228 for Optical Head Having a Vertical Flat Plate Shaped Magnetic Circuit Containing a Tracking Coil and a Focusing Coil issued to Izuka, U.S. Pat. No. 5,404,258 for Hard Disk Drive Precision Head Positioner Having a Self-aligning Head Positioner/magnetic Coil Bobbin Interface issued to Arin et al., U.S. Pat. No. 5,305,169 for Rotary Actuator Disk Drive issued to Anderson et al., U.S. Pat. No. 5,289,445 for Suspension System for Focus Actuator of an Optical Disk Drive issued to Luecke, U.S. Pat. No. 5,043,964 for Linear Pickup Actuator for Moving an Optical Pickup in a Radial Direction of a Disk issued to Suzuki, and U.S. Pat. No. 4,702,555 for Optical System Drive for Optical Recording/reproducing Apparatus issued to Iguma et al.
While these recent efforts provide advantages, I note that they fail to adequately provide an efficiently improved actuator of a hard disk drive having an improved bobbin.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made in an effort to solve the problems occurring in the related art, and a primary object of the present invention is to provide an actuator of a hard disk drive, which has a bobbin structured such that it can experience a uniform shrinkage while radiating heat after being injection-molded.
Another object of the present invention is to provide an actuator of a hard disk drive, which has a bobbin structured such that it can prevent the actuator from being wrongly operated due to a nonuniform distribution of resonance frequencies.
In order to achieve the above objects and others, according to the present invention, there is provided an actuator of a hard disk drive, comprising: a bobbin having an outside bobbin part made of plastic, an inside bobbin part of a height lower than the outside bobbin part, and a coil intervened between the outside bobbin part and the inside bobbin part by insert molding; a rib portion having a predetermined width and formed along a boundary region between the inside bobbin part and the coil such that it has the same height as the outside bobbin part; and a plurality of connecting portions having a selected width and each being branched from a center portion of the inside bobbin part and linked to a desired position on the rib portion such that it has the same height as the rib portion.
To achieve these and other objects in accordance with the principles of the present invention, as embodied and broadly described, the present invention provides an apparatus, comprising: an actuator of a hard disk drive unit, said actuator having a first end including at least one read/write is head reading data from or writing data to at least one disk, and said actuator having a second end; a bobbin unit being located at said second end of said actuator, said bobbin unit including an outer region having a first height, an inner region having a second height less than said first height, and a coil separating said outer region from said inner region; a rib unit having a height equal to said first height and having a first predetermined width, said rib unit extending along a boundary region between said inner region and said coil, said boundary region being located at an outer periphery of said inner region away from a center area of said inner region; and a plurality of connecting units each having a respective first and second end, said first ends of said plurality of connecting units being coupled to said center area of said inner region, said second ends of said plurality of connecting units being coupled to said rib unit, said connecting units having a height equal to said first height.
To achieve these and other objects in accordance with the principles of the present invention, as embodied and broadly described, the present invention provides an apparatus, comprising: an actuator of a hard disk drive unit, said actuator having a first end including at least one read/write head reading data from or writing data to at least one disk, and said actuator having a second end; a bobbin unit being located at said second end of said actuator, said bobbin unit including an outer region, an inner region, and a coil separating said outer region from said inner region; a rib unit extending along a boundary region between said inner region and said coil, said boundary region being located at an outer periphery of said inner region away from a center area of said inner region; and a plurality of connecting units each having a respective first and second end, said first ends of said plurality of connecting units being coupled to said center area of said inner region, said second ends of said plurality of connecting units being coupled to said rib unit.
To achieve these and other objects in accordance with the principles of the present invention, as embodied and broadly described, the present invention provides an apparatus, comprising: an actuator of a hard disk drive unit, said actuator having a first end including at least one read/write head reading data from or writing data to at least one disk, said actuator having a second end, said actuator pivoting around a pivot shaft located between said first and second ends of said actuator; a bobbin unit being located at said second end of said actuator, said bobbin unit including an outer region, an inner region, and a coil separating said outer region from said inner region; a rib unit extending along a boundary region between said inner region and said coil, said boundary region being located at an outer periphery of said inner region away from a center area of said inner region, said rib unit having a first predetermined width; and a plurality of connecting units each having a respective first and second end, said first ends of said plurality of connecting units being coupled to said center area of said inner region, said second ends of said plurality of connecting units being coupled to said rib unit, said plurality of connecting units having a second predetermined width.
The present invention is more specifically described in the following paragraphs by reference to the drawings attached only by way of example. Other advantages and features will become apparent from the following description and from the claims.
REFERENCES:
patent: 4702555 (1987-10-01), Iguma et al.
patent: 5043964 (1991-08-01), Suzuki
patent: 5289445 (1994-02-01), Luecke
patent: 5305169 (1994-04-01), Anderson et al.
patent: 5404258 (1995-04-01), Arin et al.
patent: 5555228 (1996-09-01), Izuka
patent: 5734528 (1998-03-01), Jabbari et al.
patent: 5790348 (1998-08-01), Alfred et al.
patent: 6061206 (2000-05-01), Foisy et al.
patent: WO 92/10833 A1 (1992-06-01), None
Bushnell , Esq. Robert E.
Renner Craig A.
Samsung Electronics Co,. Ltd.
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