Magnetic disk device

Patent metadata

Field	Value
Publication number	US-10825482-B2
Application number	US-201916558238-A
Country	US
Kind code	B2
Filing date	Sep 2, 2019
Priority date	Mar 8, 2019
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

A magnetic disk device includes a casing having a box-like base that has a bottom wall and a cover that has a first surface facing the bottom wall, a magnetic disk provided in the casing, a head configured to write data to the magnetic disk and to read data from the magnetic disk, an actuator assembly that supports the head in the casing, a conductive container on the first surface of the cover, and a conductive body in contact with the conductive container and the cover.

First claim

What is claimed is:

1. A magnetic disk device comprising:
a casing having a box-like base that has a bottom wall and a cover that has a first surface facing the bottom wall;
a magnetic disk provided in the casing;
a head configured to write data to the magnetic disk and to read data from the magnetic disk;
an actuator assembly that supports the head in the casing;
a conductive container on the first surface of the cover; and
a conductive body in contact with the conductive container and the cover,
wherein
the conductive body is formed integrally with the conductive container, and
the conductive body is a plate spring and has a projection portion that protrudes from the plate spring toward the cover and makes contact with the cover.

2. The magnetic disk device according to claim 1 , wherein
the conductive container is made of a conductive resin.

3. The magnetic disk device according to claim 1 , wherein
the conductive container accommodates therein a hygroscopic material.

4. A magnetic disk device comprising:
a casing having a box-like base that has a bottom wall and a cover that has a first surface facing the bottom wall;
a magnetic disk provided in the casing;
a head configured to write data to the magnetic disk and to read data from the magnetic disk;
an actuator assembly that supports the head in the casing;
a conductive container on the first surface of the cover;
a conductive body in contact with the conductive container and the cover; and
an adhesive member that adhesively bonds the first surface to the conductive container and that has a through-hole, wherein
the conductive body is located in the through-hole.

5. The magnetic disk device according to claim 4 , wherein
the cover has a first depressed portion that is formed in the first surface of the cover and that faces the through-hole,
the container has a second depressed portion that is formed in a second surface of the container facing the first surface of the cover and that faces the through-hole, and
the conductive body is located between the first depressed portion and the second depressed portion.

6. The magnetic disk device according to claim 5 , wherein
the conductive body is spaced apart from one of the first depressed portion and the second depressed portion.

7. The magnetic disk device according to claim 5 , wherein
the conductive body comes in contact with both the first depressed portion and the second depressed portion.

8. The magnetic disk device according to claim 7 , wherein
the first depressed portion has an inclined first inner wall, and the second depressed portion has a second inner wall inclined in a same direction to a direction in which the first inner wall is inclined, and
the conductive body comes in contact with different portions of the first inner wall and the second inner wall as the conductive body moves within a space between the first inner wall and the second inner wall.

9. The magnetic disk device according to claim 4 , wherein
the conductive body has a spherical shape.

10. The magnetic disk device according to claim 4 , wherein
the adhesive member is a double-sided tape.

11. A magnetic disk device comprising:
a casing having a box-like base that has a bottom wall and a cover that has a first surface facing the bottom wall;
a magnetic disk provided in the casing;
a head configured to write data to the magnetic disk and to read data from the magnetic disk;
an actuator assembly that supports the head in the casing;
a conductive container on the first surface of the cover;
a conductive body in contact with the conductive container and the cover; and
a flexible printed circuit board electrically connected to the actuator assembly in the casing, wherein
the conductive container is located between the actuator assembly and the flexible printed circuit board.

12. A magnetic disk device comprising:
a casing having a box-like base that has a bottom wall and a cover that has a first surface facing the bottom wall;
a magnetic disk rotatably provided in the casing;
a head configured to write data to the magnetic disk and to read data from the magnetic disk;
an actuator assembly that supports the head in the casing;
a flexible printed circuit board electrically connected to the actuator assembly;
a conductive container for storing hygroscopic material, adhesively bonded to the first surface by an insulating adhesive member and located between the actuator assembly and the flexible printed circuit board; and
a conductive body that is formed integrally with the container and comes in contact with the cover.

13. The magnetic disk device according to claim 12 , wherein the conductive container includes an opening through which gas can flow into from the casing.

14. The magnetic disk device according to claim 12 , wherein the conductive body is a plate spring that extends from the conductive body and has a projection that comes into contact with the cover.

15. A magnetic disk device comprising:
a casing having a box-like base that has a bottom wall and a cover that has a first surface facing the bottom wall;
a magnetic disk rotatably provided in the casing;
a head configured to write data to the magnetic disk and to read data from the magnetic disk;
an actuator assembly that supports the head in the casing;
a flexible printed circuit board electrically connected to the actuator assembly;
a conductive container for storing hygroscopic material, adhesively bonded to the first surface by an insulating adhesive member and located between the actuator assembly and the flexible printed circuit board; and
a conductive body located between the first surface of the cover and the conductive container.

16. The magnetic disk device according to claim 15 , wherein the conductive container includes an opening through which gas can flow into from the casing.

17. The magnetic disk device according to claim 15 , wherein
the conductive body is a spherical ball that is arranged between a first depressed portion of the first surface of the cover and a second depressed portion of the container.

18. The magnetic disk device according to claim 17 , wherein
the spherical ball is in contact with both the first depressed portion and the second depressed portion.

Assignees

• Toshiba Kk
• Toshiba Electronic Devices & Storage Corp

Inventors

• Suzuki Hirofumi
• Toukairin Kouichi
• Hasegawa Hisashi
• Kudo Masaya
• Hayasaka Kenji
• Nojima Yusuke

Classifications

• G11B33/1493

  Electro-Magnetic Interference [EMI] or Radio Frequency Interference [RFI] shielding; grounding of static charges · CPC title

• G11B33/1453

  by moisture · CPC title

• G11B33/128

  of the plurality of recording/reproducing devices, e.g. disk drives, onto a chassis · CPC title

• G11B33/045 Primary

  comprising centre hole locking means · CPC title

• G11B5/4846

  Constructional details of the electrical connection between arm and support · CPC title