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Vibration damping device and vehicle seat provided with the vibration damping device

  • US 10,252,649 B2
  • Filed: 10/16/2017
  • Issued: 04/09/2019
  • Est. Priority Date: 10/20/2016
  • Status: Active Grant
First Claim
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1. A vibration damping device comprising:

  • a spindle member through which a shaft portion is inserted, the spindle member being movable along a length direction of the shaft portion;

    a first coil spring disposed between the spindle member and a first end portion of the shaft portion in the length direction, the first portion of the shaft portion being inserted through the first coil spring, and the first coil spring urging the spindle member toward a side of a second end portion of the shaft portion in the length direction; and

    a second coil spring disposed between the second end portion of the shaft portion and the spindle member, the second end portion of the shaft portion being inserted through the second coil spring, and the second coil spring urging the spindle member toward a side of the first end portion of the shaft portion,wherein,an outer side of the shaft portion is covered with a collar member fabricated of resin, and the collar member being disposed between;

    the shaft portion andthe spindle member, the first coil spring and the second coil spring.

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