Vibration proof supporting structure for disk-type information memory unit
First Claim
1. In a file memory unit having a casing for accommodating a disk-shaped recording medium and a head positioning mechanism for positioning a read-write head along a path to an intended position on said recording medium and thereby producing head vibration, and a frame for supporting said casing through a vibration and impact absorbing means, wherein said casing accommodates a rotational drive mechanism for rotating said disk-shaped recording medium and the head positioning mechanism which produces the drive force for moving said readwrite head along the path to the intended position on said recording medium, and wherein said vibration and impact absorbing means is intended to absorb the vibration along the path that is attributable to the drive force of said head positioning mechanism within said casing and the vibration along the path that is applied to said frame from the outside of the file memory unit, wherein the improvement comprises:
- said vibration and impact absorbing means having a first spring constant along said path that is small enough to allow the movement of the head vibration for a small first displacement along the path, of said casing relative to said frame without encountering a substantialsaid vibration and impact absorbing means having a second spring constant along said path that is greater than said first spring constant for absorbing the vibration between said casing and said frame applied along said path to said frame from the outside of said frame for a second displacement along the path of said casing relative to said frame, with said second displacement occurring serially after said first displacement;
and said vibration and impact absorbing means having a third spring constant along said path that is greater than said second spring constant for absorbing a large impact applied to said frame from the outside of said frame that produces a third displacement along the path of movement of said casing relative to said frame, with said third displacement occurring serially after said second displacement.
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Accused Products
Abstract
Disclosed is a file memory unit having a casing for accommodating a head positioning mechanism and a magnetic recording disk virtually in sealed manner, and a frame for supporting the casing resiliently. The unit has the provision of a shock absorbing facility for absorbing the vibration created by the head positioning mechanism and the vibration and impact applied from the outside. The shock absorbing facility has a unitary structure having a first spring constant for absorbing relatively small vibration created by the casing, a second spring constant for absorbing the vibration applied from the outside, and a third spring constant for absorbing the impact applied from the outside.
63 Citations
10 Claims
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1. In a file memory unit having a casing for accommodating a disk-shaped recording medium and a head positioning mechanism for positioning a read-write head along a path to an intended position on said recording medium and thereby producing head vibration, and a frame for supporting said casing through a vibration and impact absorbing means, wherein said casing accommodates a rotational drive mechanism for rotating said disk-shaped recording medium and the head positioning mechanism which produces the drive force for moving said readwrite head along the path to the intended position on said recording medium, and wherein said vibration and impact absorbing means is intended to absorb the vibration along the path that is attributable to the drive force of said head positioning mechanism within said casing and the vibration along the path that is applied to said frame from the outside of the file memory unit, wherein the improvement comprises:
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said vibration and impact absorbing means having a first spring constant along said path that is small enough to allow the movement of the head vibration for a small first displacement along the path, of said casing relative to said frame without encountering a substantial said vibration and impact absorbing means having a second spring constant along said path that is greater than said first spring constant for absorbing the vibration between said casing and said frame applied along said path to said frame from the outside of said frame for a second displacement along the path of said casing relative to said frame, with said second displacement occurring serially after said first displacement; and said vibration and impact absorbing means having a third spring constant along said path that is greater than said second spring constant for absorbing a large impact applied to said frame from the outside of said frame that produces a third displacement along the path of movement of said casing relative to said frame, with said third displacement occurring serially after said second displacement. - View Dependent Claims (2, 3, 4, 5)
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6. In a vibration proof supporting structure for a disctype information memory unit, comprising:
a casing for accommodating therein a disc-shaped recording medium and a positioning mechanism for moving a read/write head along a path for positioning said read/write head at an intended position on said disc-shaped recording medium and thereby producing head vibration; a frame for mounting fixedly said casing, and a plurality of vibration absorbing members serving for connecting said casing and said frame to each other and serving for absorbing vibrations along the path of high frequencies generated in said casing in accompaniment to the movement of said read/write head as well as vibrations along the path of low frequencies transmitted to said frame externally thereof, wherein the improvement comprises; each of said vibration absorbing members including a first joint portion at which said vibration absorbing member is connected to said casing and a second joint portion located in opposition to said first joint portion and at which said vibration absorbing member is connected to said frame; each of said vibration absorbing members being of such an external configuration that the cross-section of said vibration absorbing member parallel to said first joint portion is substantially circular; and each of said vibration absorbing members having a cylindrical recess extending to a predetermined depth from said first joint portion toward said second joint portion for forming at least two separate and substantially different valued spring constants correspsonding to two serially adjacent relative movements along said path between said frame and casing and thereby correspondingly between said first joint portion and said second joint portion. - View Dependent Claims (7, 8, 9, 10)
Specification