Vibration damping means for optical recording/reproducing apparatus
A vibration damping means ( 30 ) for an optical reproducing/recording apparatus ( 100 ) includes a first damper ( 4 ), and a second damper ( 5 ) received in the first damper. The first damper has a damp coefficient adapted to absorb vibrations generated due to the spindle motor rotating. The first damper includes first and second engaging portions ( 41, 42 ) at opposite ends thereof, and a deformable portion ( 43 ) between the first and second engaging portions. A flange ( 45 ) extends from an interior surface of the deformable portion. The second damper defines a groove ( 52 ) engagingly receiving the flange of the first damper. If the apparatus sustains an impact or shock, the first and second dampers are deformed together. The overall damp coefficient of each damping means equals the sum of the damp coefficients of the first and second dampers. This larger damp coefficient enables the damping means to satisfactorily absorb the large intensity vibration.
1. A vibration damping means for an optical reproducing/recording apparatus, comprising:
a first damper with a damp coefficient adapted to absorb vibrations generated when a spindle motor of the apparatus operates, wherein the first damper defines an axial hole, and comprises first and second engaging portions located at opposite ends thereof, and a deformable portion located between the first and second engaging portions; and
a second damper received in the axial hole of the first damper, wherein opposite ends of the second damper respectively abut the first and second engaging portions of the first damper, and at least one space is defined between the first damper and the second damper.
2. The vibration damping means in accordance with claim 1 , wherein the deformable portion is thinner than the first and second engaging portions.
3. The vibration damping means in accordance with claim 1 , wherein a flange extends from an interior surface of the deformable portion.
4. The vibration damping means in accordance with claim 3 , wherein a periphery of the second damper defines a groove, and the groove engagingly receives the flange of the first damper.
5. The vibration damping means in accordance with claim 1 , wherein a periphery of the deformable portion defines a holding recess.
6. The vibration damping means in accordance with claim 1 , wherein a plurality of contact protrusions is respectively formed on end surfaces of the first and second engaging portions.
7. The vibration damping means in accordance with claim 1 , wherein the second damper defines an axial hole.
8. The vibration damping means in accordance with claim 1 , wherein the first damper and the second damper are made of elastic material.
9. An optical recording and/or reproducing apparatus comprising:
a base member;
a frame for supporting the base member;
a spindle motor located on the base member for rotating an optical disk located thereon;
an optical pickup unit mounted on the base member for transmitting laser beams onto the optical disk and receiving laser beams returned from the optical disk; and
a vibration damping means connecting the base member with the frame, the vibration damping means including:
a first damper with a damp coefficient adapted to absorb vibrations generated when the spindle motor rotates, wherein the first damper defines an axial hole, and comprises first and second engaging portions located at opposite ends thereof, and a deformable portion located between the first and second engaging portions; and
a second damper received in the axial hole of the first damper, wherein opposite ends of the second damper respectively abut the first and second engaging portions of the first damper, and at least one space is defined between the first damper and the second damper.
10. The optical recording and/or reproducing apparatus in accordance with claim 9 , wherein a flange extends from an interior surface of the deformable portion, a periphery of the second damper defines a groove, and the groove engagingly receives the flange of the first damper.
11. A vibration damping means for an optical reproducing/recording apparatus having a vibration-sensitive component installed in a frame of said apparatus, comprising:
a first damper installed between said frame and said component, and having damping engagement with said frame and said component respectively, wherein the first damper defines an axial hole, and comprises first and second engaging portions located at opposite ends thereof, and a deformable portion located between the first and second engaging portions, a flange extends from an interior surface of the deformable portion; and
a second damper installed next to said first damper, and having damping engagement with said frame and said first damper respectively, wherein the second damper is received in the axial hole of said first damper, a periphery of the second damper defines a groove, the groove engagingly receives the flange of the first damper, and at least one space is defined between the first damper and the second damper.
12. The vibration damping means in accordance with claim 11 , wherein said first damper has a plurality of contact protrusions extending therefrom to have said damping engagement with said frame.
13. The vibration damping means in accordance with claim 11 , wherein said first damper is cylindrical.
14. The vibration damping means in accordance with claim 13 , wherein said second damper is cylindrical.
15. The vibration damping means in accordance with claim 14 , wherein said second damper has an axial second hole to allow a screw passing therethrough and retaining said second damper to said frame.
16. The vibration damping means in accordance with claim 11 , wherein opposite ends of the second damper respectively abut the first and second engaging portions of the first damper.