Disk drive device having airtight structure with improved airtightness
A disk drive device is configured such that a wall of a base plate is provided with a through hole that guides a lead from a drive unit outside. The through hole is covered by a sealing sheet having an insertion hole. The lead is guided from inside the housing via the insertion hole of the sealing sheet. The sealing sheet carries a curable resin. The curable resin, temporarily softened during a curing process, flows into a space between the base plate and the through hole and a space between the insertion hole and the lead. The curable resin is cured in this state, ensuring the airtightness of the housing.
1. A disk drive device comprising:
a housing;
a bearing unit provided in the housing and operative to rotatably support a recording disk with respect to the housing; and
a drive unit operative to drive the recording disk supported by the bearing unit into rotation, wherein
the housing is provided with a through hole that guides a lead from the drive unit outside the housing, and
a sealing sheet formed with an insertion hole for guiding the lead that carries, on a base permeable to air due to a mesh structure or fiber structure, a curable resin temporarily softened during a curing process and cured afterwards, and that seals the insertion hole and the through hole so as to form a closed space in the housing.
2. The disk drive device according to claim 1 , wherein the diameter of the insertion hole is substantially equal to the diameter of the lead inserted.
3. The disk drive device according to claim 1 , wherein the base of the sealing sheet has elasticity.
4. The disk drive device according to claim 3 , wherein the diameter of the insertion hole is equal to or smaller less than the diameter of the lead inserted.
5. The disk drive device according to claim 1 , wherein a part of the sealing sheet is formed in conformity with the shape of the through hole so as to enter the through hole.
6. The disk drive device according to claim 1 , wherein the sealing sheet is placed such that the center of the insertion hole formed in the sealing sheet corresponds to the center of the through hole of the housing.
7. The disk drive device according to claim 1 , wherein the diameter of the insertion hole is sized so that a plurality of leads are bundled and guided through, and the insertion hole operates to bundle and secure a plurality of leads.
8. The disk drive device according to claim 1 , wherein the insertion hole is provided with a filler for preventing the inflow of an out-gas from the sealing sheet installed in its place to the interior of the housing.
9. The disk drive device according to claim 1 , wherein a cut that extends from the end of the sealing sheet to the insertion hole and that is closed by the curing of the curable resin is formed in the sealing sheet.
10. The disk drive device according to claim 1 , wherein the sealing sheet is provided with a plurality of insertion holes so that a plurality of leads are separated before being inserted into the holes.
11. The disk drive device according to claim 1 , wherein a cover sealing sheet carrying a curable resin on a base permeable to air, due to a mesh structure or fiber structure, is placed to cover the through hole and a part of the lead guided along the outer surface of the housing via the through hole, the curable resin being softened temporarily during a curing process and cured afterwards.